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kick/kick.c
Andrew Hamilton 50a660860d protocols: honor tearing hints and fractional scale 
Drive the output commit's async-flip flag from the shown surface's
tearing hint (a real tearing flip on DRM; correctly ignored on
headless/nested), with per-object hint tracking that requests a frame
on change. Notify each surface of the output scale at claim so
clients never guess preferred_scale.

wltest gains --tearing and --fractional-out (plus linking the two
protocol stubs it now uses); smoke tests cover the async commit
transition and the notified scale value.
2026-09-04 10:21:30 +10:00

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/* kick.c -- nested kick compositor built on wlroots 0.19.
*
* Renders a headless wlroots output (via wlr_scene) inside a host Wayland
* window (the "host" connection, e.g. labwc). Input from the host is
* forwarded into a wlr_seat, so wlroots handles all sub-surface hit-testing,
* enter/leave, input regions and coordinate translation. Clients are always
* maximized to the host content area; a client's fullscreen request is
* honored and mirrors onto the host window, and vice versa.
*/
#define _GNU_SOURCE
#include <errno.h>
#include <execinfo.h>
#include <fcntl.h>
#include <linux/memfd.h>
#include <poll.h>
#include <signal.h>
#include <stdarg.h>
#include <stdbool.h>
#include <stdint.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <sys/mman.h>
#include <sys/poll.h>
#include <sys/wait.h>
#include <time.h>
#include <unistd.h>
#include <drm_fourcc.h>
#include <wayland-client.h>
#include <wayland-egl.h>
#include <wayland-server.h>
#include <libdecor.h>
#include "xdg-shell-client.h"
#include "xdg-decoration-client.h"
#include "wlr-data-control-client.h"
#include <EGL/egl.h>
#include <EGL/eglext.h>
#include <GLES2/gl2.h>
#include <GLES2/gl2ext.h>
#include <xkbcommon/xkbcommon.h>
/* xkbcommon 1.6 renamed/removed the Mod4 macro: >= 1.7 defines only the
legacy XKB_MOD_NAME_LOGO (kept for compat), < 1.7 defines the modern
XKB_MOD_NAME_MOD4. Prefer the modern name where it exists. */
#ifdef XKB_MOD_NAME_MOD4
#define XKB_PREFIX_MOD4_NAME XKB_MOD_NAME_MOD4
#else
#define XKB_PREFIX_MOD4_NAME XKB_MOD_NAME_LOGO
#endif
#include <ft2build.h>
#include FT_FREETYPE_H
#include <cairo.h>
#include <librsvg/rsvg.h>
#include <png.h>
#include <wlr/backend.h>
#include <wlr/backend/headless.h>
#include <wlr/backend/session.h>
#include <wlr/interfaces/wlr_keyboard.h>
#include <wlr/render/allocator.h>
#include <wlr/render/drm_format_set.h>
#include <wlr/render/egl.h>
#include <wlr/render/gles2.h>
#include <wlr/render/pass.h>
#include <wlr/render/swapchain.h>
#include <wlr/render/wlr_renderer.h>
#include <wlr/render/wlr_texture.h>
#include <wlr/types/wlr_buffer.h>
#include <wlr/types/wlr_compositor.h>
#include <wlr/types/wlr_content_type_v1.h>
#include <wlr/types/wlr_cursor.h>
#include <wlr/types/wlr_cursor_shape_v1.h>
#include <wlr/types/wlr_data_control_v1.h>
#include <wlr/types/wlr_data_device.h>
#include <wlr/types/wlr_ext_foreign_toplevel_list_v1.h>
#include <wlr/types/wlr_foreign_toplevel_management_v1.h>
#include <wlr/types/wlr_fractional_scale_v1.h>
#include <wlr/types/wlr_gamma_control_v1.h>
#include <wlr/types/wlr_idle_inhibit_v1.h>
#include <wlr/types/wlr_idle_notify_v1.h>
#include <wlr/types/wlr_input_device.h>
#include <wlr/types/wlr_layer_shell_v1.h>
#include <wlr/types/wlr_keyboard.h>
#include <wlr/types/wlr_keyboard_shortcuts_inhibit_v1.h>
#include <wlr/types/wlr_linux_dmabuf_v1.h>
#include <wlr/types/wlr_output.h>
#include <wlr/types/wlr_output_layout.h>
#include <wlr/types/wlr_output_power_management_v1.h>
#include <wlr/types/wlr_pointer.h>
#include <wlr/types/wlr_pointer_constraints_v1.h>
#include <wlr/types/wlr_pointer_gestures_v1.h>
#include <wlr/types/wlr_presentation_time.h>
#include <wlr/types/wlr_primary_selection.h>
#include <wlr/types/wlr_primary_selection_v1.h>
#include <wlr/types/wlr_relative_pointer_v1.h>
#include <wlr/types/wlr_scene.h>
#include <wlr/types/wlr_screencopy_v1.h>
#include <wlr/types/wlr_seat.h>
#include <wlr/types/wlr_session_lock_v1.h>
#include <wlr/types/wlr_single_pixel_buffer_v1.h>
#include <wlr/types/wlr_touch.h>
#include <wlr/types/wlr_shm.h>
#include <wlr/types/wlr_subcompositor.h>
#include <wlr/types/wlr_tearing_control_v1.h>
#include <wlr/types/wlr_text_input_v3.h>
#include <wlr/types/wlr_input_method_v2.h>
#include <wlr/types/wlr_viewporter.h>
#include <wlr/types/wlr_virtual_keyboard_v1.h>
#include <wlr/types/wlr_virtual_pointer_v1.h>
#include <wlr/types/wlr_xcursor_manager.h>
#include <wlr/types/wlr_xdg_activation_v1.h>
#include <wlr/types/wlr_xdg_dialog_v1.h>
#include <wlr/types/wlr_xdg_output_v1.h>
#include <wlr/types/wlr_xdg_shell.h>
#include <wlr/util/log.h>
/* XWayland support is on when the linked wlroots was built with it
(WLR_HAS_XWAYLAND in the public <wlr/config.h>) and the xcb dev headers
are available (KICK_HAVE_XCB from meson.build). Anything missing and the
X11 branches below compile away. */
#include <wlr/config.h>
#if defined(WLR_HAS_XWAYLAND) && defined(KICK_HAVE_XCB)
#define HAVE_XWAYLAND 1
#else
#define HAVE_XWAYLAND 0
#endif
#if HAVE_XWAYLAND
#include <wlr/xwayland/xwayland.h>
#endif
/* server.tabs is a plain list of tabs; there is no tab limit. */
/* ===================== Server-side (wlroots) state ===================== */
/* A tab is only an organizing container: a list head holding the windows
that share it. With --tab-groups off, every window gets its own tab
(one window per tab). With --tab-groups on, a second window from the
same client is linked into its owner's window list. A tab carries zero
business data -- every field lives on kick_window. */
struct kick_tab {
struct wl_list link; /* server.tabs */
struct wl_list windows; /* kick_window.link */
};
/* One window. Every surface kick shows -- a command's first toplevel (a
black pending tab is its still-unsurfaced window), a grouped second
window from the same client, an external client's window -- is one
identical kick_window linked into its tab's window list. All state
(launch identity, surface, scene tree, listeners, icon, focus and
lifecycle) lives here; the old kick_app/kick_tab_group_member split is
gone. */
struct kick_window {
struct kick_tab *tab;
struct wl_list link; /* tab->windows */
char *cmd;
pid_t pid;
/* Process group the *connected* client lives in. Command-line commands
are forked all at once at startup (see launch_all_cli), so a CLI tab's
launcher window is claimed by whichever command's client connects --
matched by process group at claim time, not by order; grouped and
external windows claim later. A close must signal the group recorded
at claim time rather than the launcher's pid. */
pid_t pgid;
/* PID of the *connected* client (from claim-time credentials). Used as
the kill target when the client belongs to a process group we do not
own (e.g. one started from the compositor's own shell/terminal), where
signaling the whole group would kill the launcher's session too. */
pid_t client_pid;
struct wlr_xdg_toplevel *toplevel;
/* Foreign toplevel management handles (taskbar/switcher). One
wlr-foreign handle plus one ext-foreign handle per window; taskbars
enumerate these and can request activation/close. Both are NULL until
the window is claimed by a surfaced toplevel (a pending black window
has none). */
struct wlr_foreign_toplevel_handle_v1 *ft_handle;
struct wlr_ext_foreign_toplevel_handle_v1 *ext_handle;
struct wl_listener ft_activate;
struct wl_listener ft_close;
struct wl_listener ft_maximize;
struct wl_listener ft_fullscreen;
struct wl_listener ft_handle_destroy;
struct wl_listener ext_handle_destroy;
#if HAVE_XWAYLAND
/* An X11 window: an Xwayland surface instead of an xdg toplevel
(toplevel is NULL, is_x11 set). Shared window logic goes through the
window_* view helpers; only claim/scene wiring differs per surface
kind. */
bool is_x11;
struct wlr_xwayland_surface *xsurface;
#endif
/* This window's scene tree, a direct child of server.scene->tree. kick
shows exactly one window at a time, so only the focused window of the
active tab's tree is enabled (see show_window). */
struct wlr_scene_tree *tree;
bool mapped;
/* Whether this window is the one currently shown within its tab -- the
tab's rotation cursor. Exactly one window of a tab has it at a time;
kept across tab switches so returning to a tab restores the window
that was focused when the user left. */
bool focused;
/* The user closed this window (Alt+Delete). While set, tab cycling
skips tabs whose windows are all closing, and the SIGKILL escalation
timer (close_timer) may still be armed. */
bool closing;
struct wl_event_source *close_timer;
/* Extra grouped window of an X11 tab (--tab-groups on): a transient --
menu, palette, dialog -- that floats at its client's geometry instead
of being configured to the output size. */
bool transient;
struct wl_listener destroy;
struct wl_listener map;
struct wl_listener unmap;
struct wl_listener commit;
struct wl_listener set_title;
struct wl_listener set_app_id;
struct wl_listener request_maximize;
struct wl_listener request_fullscreen;
struct wl_listener request_minimize;
struct wl_listener request_move;
struct wl_listener request_resize;
/* xdg-dialog wiring: set when the toplevel carries an xdg_dialog_v1
object (modal flag mirrored). dialog_wired guards removal: the
dialog object lives and dies on its own schedule, and a toplevel
may gain a second one after the first is destroyed. */
struct wl_listener dialog_set_modal;
struct wl_listener dialog_destroy;
bool dialog_wired;
bool modal;
/* The wired xdg_dialog_v1 object (wlroots emits set_modal with NULL
data, so the object is recovered here, not from the event). */
struct wlr_xdg_dialog_v1 *dialog;
#if HAVE_XWAYLAND
/* Extra X11-only listeners: surface association and the ICCCM requests
with no xdg counterpart. map/commit/destroy/request_maximize/
request_fullscreen/request_minimize are shared with the xdg path. */
struct wl_listener xs_associate;
struct wl_listener xs_dissociate;
struct wl_listener xs_request_configure;
struct wl_listener xs_request_activate;
struct wl_listener xs_request_close;
struct wl_listener xs_set_title;
struct wl_listener xs_set_class;
/* map/commit listen on the associated wlr_surface; tracked so destroy
never removes links that dissociate already removed. */
bool xs_surface_linked;
#endif
int icon_w, icon_h;
/* Resolved overlay icon (a wlroots texture). */
struct wlr_texture *icon_wlr;
bool icon_resolved; /* true once a load attempt has been made */
char icon_app_id[128];
/* Last cursor-shape-v1 shape requested by this window's client (0 = none
requested yet). Reset on focus change so a switched-from window's
shape never bleeds onto the next one. */
int cursor_shape;
/* Slot awaiting its surface. True from creation until a client claims
the window in handle_new_toplevel (matched by launch process group),
so a CLI tab or a fresh Alt+Shift+T terminal is live-but-black while
its command starts: it shows in the overlay with its command line as
the title, and cycling can land on it (backdrop + title). Cleared on
claim, and again when a black tab is closed. */
bool pending_claim;
/* Where this window came from. ORIGIN_CLI windows hold the command-line
commands and are forked all at once at startup (see launch_all_cli),
so the tab order mirrors the command line. ORIGIN_ADD_TAB is an
Alt+Shift+T terminal. ORIGIN_GROUP is a window from an
already-connected client (a bare second toplevel when --tab-groups is
on) and is glued right of its parent tab. ORIGIN_EXTERNAL is a client
we did not launch (e.g. started from our own shell). */
enum { ORIGIN_CLI, ORIGIN_ADD_TAB, ORIGIN_GROUP, ORIGIN_EXTERNAL } origin;
/* For ORIGIN_GROUP windows that get their own tab: the tab owning the
connected client this window belongs to (the "parent" tab its new tab
is glued right of). */
struct kick_tab *parent_tab;
/* Last overlay chip title drawn for this window; the row shows whichever
window the tab is currently displaying, so this cache lets the overlay
log one line per actual change. */
char row_title[128];
};
struct kick_server {
struct wl_display *wl_display;
struct wl_event_loop *loop;
struct wlr_backend *backend;
struct wlr_renderer *renderer;
struct wlr_allocator *allocator;
struct wlr_scene *scene;
struct wlr_output *output;
struct wlr_scene_output *scene_output;
struct wlr_scene_rect *bg_rect;
/* Transparent full-output sentinel used to force whole-output damage on
overlay transitions; see standalone_overlay_damage(). */
struct wlr_scene_rect *overlay_damage_rect;
/* Standalone-only cursor: a real wlr_cursor so the pointer is visible
(hardware cursor plane on DRM, scene-composited on headless). */
struct wlr_cursor *cursor;
struct wlr_xcursor_manager *xcursor_mgr;
struct wlr_output_layout *output_layout;
struct wlr_seat *seat;
struct wlr_xdg_shell *xdg_shell;
/* Kept for wlr_xwayland_create(), which needs the compositor global. */
struct wlr_compositor *compositor;
#if HAVE_XWAYLAND
/* XWayland: wlroots' XWM plus a lazy Xwayland server (spawned on the
first X11 client connect). or_windows holds the override-redirect
windows (menus, tooltips) that float above the tab trees. */
struct wlr_xwayland *xwayland;
struct wl_listener xwayland_new_surface;
struct wl_listener xwayland_ready;
struct wl_listener xwayland_destroy;
struct wl_list or_windows;
struct wl_list x11_pendings;
/* The tab whose surface held the keyboard before an override-redirect
window took it; restored when that window unmaps. */
struct kick_tab *or_focus_owner;
#endif
/* Client cursor-shape-v1 requests (wlr_cursor_shape_manager_v1). The
manager is passive: it emits request_set_shape and we either apply the
shape to our standalone cursor or forward it to the host pointer. */
struct wlr_cursor_shape_manager_v1 *shape_mgr;
struct wl_listener shape_listener;
/* Protocol managers that only need to outlive the display: presentation
(frame pacing), xdg-output (logical output geometry) and viewporter
(wl_viewport buffer scaling). Kept as fields so the globals are not
garbage collected while clients still hold resources. */
struct wlr_presentation *presentation;
struct wlr_xdg_output_manager_v1 *xdg_output_mgr;
struct wlr_viewporter *viewporter;
/* Content hints (photo/video/game) + single-pixel buffers (1x1 solid
color, no shm pool). Both are passive: wlroots tags/allocates
internally, we only query the type for the debug log. */
struct wlr_content_type_manager_v1 *content_type_mgr;
struct wlr_single_pixel_buffer_manager_v1 *single_pixel_mgr;
/* Primary selection (zwp_primary_selection_v1). Clients request the
selection on their seat device; the request handler below is what
actually installs it on the seat, mirroring the clipboard path. */
struct wlr_primary_selection_v1_device_manager *primary_selection_mgr;
struct wl_listener request_set_primary_selection;
/* Foreign toplevel management (taskbars / switchers). wlr-foreign is the
classic protocol most status bars (waybar taskbar) consume; ext-foreign
is the newer replacement. One handle per live kick window. */
struct wlr_foreign_toplevel_manager_v1 *foreign_mgr;
struct wlr_ext_foreign_toplevel_list_v1 *ext_foreign_list;
/* Idle notification (ext-idle-notify-v1) plus idle-inhibit-v1. Reports
user inactivity to bars/DPMS and lets apps suppress it. */
struct wlr_idle_notifier_v1 *idle_notifier;
bool idle_inhibited;
struct wlr_idle_inhibit_manager_v1 *idle_inhibit_mgr;
struct wl_listener idle_new_inhibitor;
struct wl_listener idle_inhibit_destroy;
struct wl_list idle_inhibitors;
/* Screen capture (wlr-screencopy-unstable-v1) for tools like grim. wlroots
drives the output commit path itself (it locks attach-render and calls
wlr_output_update_needs_frame), so beyond advertising the global there is
nothing to wire up: every output commit that carries a rendered buffer
becomes a copyable frame. */
struct wlr_screencopy_manager_v1 *screencopy_mgr;
/* Tearing (wp-tearing-control-v1) + fractional-scale (wp-fractional-scale):
the shown surface's hint drives the commit's async-flip flag (see
apply_tearing_hint), and each surface learns the output scale at
claim. Per-object tearing listeners live in kick_tearing. */
struct wlr_tearing_control_manager_v1 *tearing_mgr;
struct wl_listener tearing_new_object;
struct wlr_fractional_scale_manager_v1 *fractional_scale_mgr;
/* Output power management (zwlr_output_power_management_v1): a client
(e.g. wlopm) blanks or unblanks a specific output. kick's seatless
headless/standalone output maps to the single server output. */
struct wlr_output_power_manager_v1 *output_power_mgr;
struct wl_listener output_power_set_mode;
bool output_powered;
/* Gamma control (night-light tools like wlsunset/gammastep): a client
sets a per-output ramp; wlroots rejects outputs with no LUT (e.g.
the headless output) itself, so the handler only commits ramps for
the single server output. Only takes visible effect on DRM. */
struct wlr_gamma_control_manager_v1 *gamma_mgr;
struct wl_listener gamma_set;
/* Keyboard shortcuts inhibit (zwp_keyboard_shortcuts_inhibit_v1): lets a
fullscreen game/VM grab the compositor's keyboard shortcuts. While the
focused surface's inhibitor is active, the grab chords in
process_key_event are swallowed (see process_key_event). */
struct wlr_keyboard_shortcuts_inhibit_manager_v1 *kb_inhibit_mgr;
struct wl_listener kb_inhibit_new_inhibitor;
/* Virtual keyboard/pointer (zwp_virtual_keyboard_v1 /
zwp_virtual_pointer_v1): synthesised input from clients like wtype, fed
into the seat just like real devices. */
struct wlr_virtual_keyboard_manager_v1 *virtual_kb_mgr;
struct wl_listener virtual_kb_new;
struct wl_list virtual_kbs;
struct wlr_virtual_pointer_manager_v1 *virtual_ptr_mgr;
struct wl_listener virtual_ptr_new;
struct wl_list virtual_ptrs;
/* Xdg-activation (xdg-activation-v1): lets a launcher focus a window by
token instead of requiring user input at exactly the right time. On a
request_activate we switch to the tab owning that surface. */
struct wlr_xdg_activation_v1 *xdg_activation;
struct wl_listener xdg_activation_request;
/* xdg-dialog (xdg-dialog-v1): modal toplevels demand attention -- on
map (or when set modal while mapped) their tab is shown and the
dialog takes window focus, in both --tab-groups modes. */
struct wlr_xdg_wm_dialog_v1 *dialog_mgr;
struct wl_listener dialog_new;
/* Pointer constraints + relative pointer (zwp_pointer_constraints_v1 /
zwp_relative_pointer_v1). Only the focused surface's constraint is
active; its region lives in the surface's local space, so the surface's
scene origin is cached when the constraint activates. */
struct wlr_pointer_constraints_v1 *pointer_constraints;
struct wlr_relative_pointer_manager_v1 *relative_pointer_mgr;
struct wlr_pointer_constraint_v1 *active_constraint;
struct wl_listener constraint_destroy;
struct wl_listener seat_pointer_focus;
/* Pointer gestures (touchpad swipe/pinch/hold): libinput devices and
the test feed drive the shared forwarders below, which fan out to
gesture clients holding seat pointer focus (see gesture section). */
struct wlr_pointer_gestures_v1 *gestures;
/* Text input + input method (OSK/IME, e.g. fcitx5): the focused tab's
text-input state is relayed to the in-session input method and the
IME's preedit/commit strings back to the focused field (see the
text-input section). Popups (candidate windows) render into
input_popup_tree, above the tab trees. */
struct wlr_text_input_manager_v3 *text_input_mgr;
struct wlr_input_method_manager_v2 *input_method_mgr;
struct wl_listener text_input_new;
struct wl_listener input_method_new;
struct wl_listener seat_keyboard_focus;
struct wlr_scene_tree *input_popup_tree;
struct wl_list input_popups; /* kick_input_popup.link */
struct wl_list input_methods; /* kick_input_method.link */
double constraint_ox, constraint_oy;
double lock_x, lock_y;
double last_ptr_x, last_ptr_y;
/* Last cursor shape applied (standalone) or forwarded (nested), as a
wp_cursor_shape_device_v1 shape value; 0 = nothing applied yet. */
int cursor_shape;
struct wlr_keyboard keyboard;
struct wlr_swapchain *swapchain;
/* Self-pipe used to wake the idle event loop from the SIGUSR1 dump
handler (async-signal-safe write); the drain callback runs in the main
loop and the render gate consumes needs_redraw. */
struct wl_event_source *sigpipe_src;
int sig_pipe[2];
struct wl_listener new_output;
struct wl_listener new_toplevel;
struct wl_listener new_popup;
struct wl_listener frame;
struct wl_listener output_destroy;
struct wl_event_source *ctl_source;
/* The active tab in server.tabs. Set to the last command-line command's
tab at startup, so that tab is active -- black, with its command line
as the overlay title -- from the very first frame and the user only
waits for it. A tab that is active while still pending (no surfaced
window yet) shows the black backdrop and clear seat focus until one
maps. */
struct kick_tab *active_tab;
/* Tabs, in overlay/cycle order: a list of kick_tab, each holding its
window list. */
struct wl_list tabs;
/* wlr-layer-shell (waybar / panels). Layer surfaces render into their
own always-on-top scene tree (layer_tree) instead of being tabs, so a
bar stays visible no matter which tab is focused. The bar's exclusive
zone shrinks the usable area the maximized tabs are sized into. */
struct wlr_layer_shell_v1 *layer_shell;
struct wl_listener new_layer_surface;
struct wlr_scene_tree *layer_tree;
/* xdg_popups from foreign clients (a layer-shell bar such as wf-panel-pi)
that have no live kick-managed parent hang off this dedicated scene
tree, rooted at the output origin, so their positioner geometry maps to
real pixels instead of inheriting a tab tree's bar-offset. Kept on top
like layer_tree. */
struct wlr_scene_tree *popup_tree;
/* Layer surfaces, in reservation order (head = highest layer / lowest
overlap priority); see kick_layer. */
struct wl_list layer_surfaces;
/* ================= ext-session-lock-v1 =================
When a lock client (swaylock) grabs the session, the screen is blanked
and input is held. lock_surface_* mirror the lock client's surface for
the single output; lock_surface_tree is a scene tree that floats above
everything (layer_tree and popup_tree) while locked. Background blanking
uses an opaque black rect beneath the lock surface. The scene grows no
persistent overhead here: lock_surface_tree and lock_backdrop are only
created while a lock request is in flight. */
struct wlr_session_lock_manager_v1 *session_lock_manager;
struct wl_listener session_lock_new_lock;
struct wlr_session_lock_v1 *session_lock;
bool session_locked;
struct wlr_scene_tree *lock_surface_tree;
struct wlr_scene_rect *lock_backdrop;
struct wlr_scene_tree *lock_surface_ssd;
struct wlr_session_lock_surface_v1 *lock_surface;
struct wl_listener lock_surface_destroy;
struct wl_listener lock_surface_map;
struct wl_listener session_lock_new_surface;
struct wl_listener session_lock_unlock;
struct wl_listener session_lock_destroy;
/* The command launched via --panel (a layer-shell panel such as waybar);
NULL when no panel was requested. */
char *panel_cmd;
pid_t panel_pid;
/* Origin of the usable area the maximized tabs are sized into: the top-left
of the output shifted by any bar's reserved edge, so tabs start below a
top bar instead of being covered by it. (0,0) with no bar reserved. */
int layout_x, layout_y;
struct xkb_context *xkb_ctx;
struct xkb_keymap *xkb_keymap;
struct xkb_state *xkb_state;
/* Modifier index of the tab-management prefix (Alt or Super/Mod4,
per --modifier). */
xkb_mod_index_t xkb_prefix_mod;
/* A client's fullscreen request is honored and mirrored onto the host
window, and vice versa. */
bool clients_fullscreen;
/* Standalone (real output) mode: the output is driven directly by a
native backend (DRM/headless) instead of being blitted into a host
window. Set from KICK_MODE=standalone or a forced WLR_BACKENDS. */
bool standalone;
bool standalone_headless;
struct wlr_session *session;
struct wl_listener new_input;
struct wlr_texture *overlay_atlas_wlr; /* standalone: overlaid atlas */
/* Standalone native keyboard devices (one entry per libinput keyboard;
see standalone_kbdev below). */
struct wl_list kbdevs;
/* Standalone native pointer devices (one entry per libinput pointer;
see standalone_ptrdev below). */
struct wl_list ptrdevs;
/* Standalone native touchscreen devices (see standalone_touchdev). */
struct wl_list touchdevs;
};
/* Requested output resolution from --screen-mode WxH[@Hz]; 0/0/0 means "let
the output pick its preferred mode". Refresh is stored in mHz. */
static int mode_req_w, mode_req_h;
static int mode_req_refresh;
/* The command-line command to start focused (--start-cmd-index), 0-based as
soon as the (1-based) user value is parsed. -1 (unset) means the last
command, keeping the startup contract. */
static int start_cmd_index = -1;
/* ===================== Host-side (nested) state ===================== */
/* One cached ASCII glyph in the overlay's font atlas texture. */
struct overlay_glyph {
int ax, ay; /* atlas pixel origin */
int pw, ph; /* glyph bitmap size */
int adv; /* advance width, pixels */
int top; /* y offset of the glyph top from the row top */
};
struct kick_host {
struct wl_display *display;
struct wl_registry *registry;
struct wl_compositor *compositor;
struct wl_surface *surface;
struct xdg_wm_base *wm_base;
/* The nested host window has two backends selected at startup:
- direct xdg-shell (default on compositors advertising
zxdg_decoration_manager_v1 -- labwc/sway/KDE): kick owns the
xdg_surface/xdg_toplevel, requests server-side decorations and
acks configure events immediately. No set_window_geometry hints,
so no stale-view anchoring on fullscreen (labwc 0.9.8 bug).
- libdecor (hosts forcing CSD, e.g. Mutter/GNOME): libdecor owns the
shell objects and draws the titlebar.
KICK_LIBDECOR=1 forces the libdecor path for testing. */
bool use_libdecor;
struct libdecor *libdecor;
struct libdecor_frame *frame;
struct xdg_surface *xdg_surface;
struct xdg_toplevel *toplevel;
struct zxdg_decoration_manager_v1 *decoration;
struct zxdg_toplevel_decoration_v1 *decoration_obj;
struct wl_seat *seat;
struct wl_keyboard *keyboard;
struct wl_pointer *pointer;
struct wl_touch *touch;
/* Host cursor-shape-v1: forward a nested client's requested cursor shape
to the host compositor (which draws the cursor over our window). The
device binds to the host pointer and goes inert with it, so it is
recreated whenever pointer capability is re-gained. */
struct wp_cursor_shape_manager_v1 *shape_mgr;
struct wp_cursor_shape_device_v1 *shape_dev;
uint32_t ptr_serial; /* latest host wl_pointer.enter serial */
uint32_t seat_name; /* registry name of the bound wl_seat global */
bool registry_synced; /* initial registry scan completed */
bool configured;
bool fullscreen;
int width, height;
/* EGL */
bool egl_ok;
EGLDisplay egl_display;
EGLConfig egl_config;
EGLContext egl_context;
EGLSurface egl_surface;
struct wl_egl_window *egl_window;
/* host modifiers (for tab-switch detection) */
uint32_t host_mods_depressed;
uint32_t axis_source;
int32_t axis_discrete[2];
/* GL program */
GLuint gl_program;
GLint gl_pos_loc, gl_uv_loc, gl_tex_loc, gl_color_loc;
GLuint import_tex;
/* Alt-held tab-title overlay */
bool overlay_visible;
struct overlay_glyph overlay_glyphs[95]; /* chars 32..126 */
int overlay_font_h; /* ascent + descent, pixels */
/* Present gating: at most one buffer aimed at the host compositor at a
time, paced by the host surface's wl_callback. */
struct wl_callback *frame_cb;
bool present_pending;
bool back_dirty;
/* Host-window fullscreen request waiting for the present pipeline to
drain (see host_apply_fullscreen). */
bool fs_queued;
bool fs_target;
/* Keybind repeat for the captured tab-switch binding. The host
compositor only sends one physical press, so we drive the repeat
ourselves with a timer (fixed delay/rate), like labwc does for its
own keybinds. */
struct wl_event_source *repeat_timer;
uint32_t repeat_key;
int repeat_dir;
/* What each repeat tick should do: REPEAT_CYCLE switches tabs,
REPEAT_REORDER moves the active tab within the list, REPEAT_SUBCYCLE
rotates the active tab's stacked windows. */
enum { REPEAT_CYCLE, REPEAT_REORDER, REPEAT_SUBCYCLE,
REPEAT_MEMBER_MOVE } repeat_kind;
};
static struct kick_server server;
static struct kick_host host;
static char kick_socket[64];
static char socket_path[256];
static volatile sig_atomic_t needs_redraw;
static bool frame_pending;
static bool shutting_down;
/* Terminal launched for the Alt+Shift+T "new tab" binding. Defaults to
alacritty (sane no-config font size, unlike foot's 8pt); overridable via
the $TERMINAL environment variable. The value is used verbatim by sh -c,
so it may carry arguments. */
static const char *term_cmd = "alacritty";
static bool term_key_held; /* Alt+Shift+T currently down (repeat latch) */
static bool delete_key_held; /* prefix+Delete currently down (repeat latch) */
static bool f11_key_held; /* prefix+F11 currently down (repeat latch) */
static bool quit_key_held; /* Ctrl+Alt+Q currently down (repeat latch) */
/* Confirm-before-quit: set when a quit was requested (host window close or
Ctrl+Alt+Q) with more than one live window open. While set, a modal
panel over the composited frame asks Y/Enter (quit) or N/Escape (keep
running) and every key is swallowed so focused clients never see them. */
static bool confirm_quit_pending;
/* The modifier prefix for the tab-management chords: hold = show overlay,
Up/Down = cycle, Shift+Up/Down = reorder, Delete = close. Defaults to
Alt; --modifier super selects Super (Mod4), which is a good fit for
standalone/DRM and labwc-style hosts that do not reserve it the way
GNOME does. */
enum kick_prefix { PREFIX_ALT, PREFIX_SUPER };
static enum kick_prefix tab_prefix = PREFIX_ALT;
/* --tab-groups: how a related window from an already-connected client groups
with its tab. A window is "related" when its client process is a (direct or
indirect) child of that tab's client process (process ancestry, walked up
/proc). 'on' (default) stacks related windows above the parent tab's
surface -- they share the tab's visibility and take keyboard focus while
that tab is shown, and never appear in cycling or the overlay (a
browser-style tab group); 'off' gives each related window its own tab. */
static bool tab_groups = true;
/* ===================== Clipboard bridge ===================== */
enum bridge_backend {
BRIDGE_BACKEND_NONE = 0,
BRIDGE_BACKEND_DATA_CONTROL,
BRIDGE_BACKEND_WL_DATA_DEVICE,
};
/* Bridges the nested seat's selection with the host compositor's. Two host
backends share one inner (nested-seat) implementation:
- data-control: zwlr_data_control_v1 (labwc/sway/etc.), full duplex,
independent of keyboard focus; its v2 set_primary_selection /
primary_selection pair carries the primary (middle-click) selection.
- wl_data_device: plain stable protocol (Mutter/GNOME fallback). Writing
the host selection always works (needs a captured keyboard serial);
reading the host selection only works while our window is focused.
It has no primary selection, so the primary bridge only exists on the
data-control backend.
Data flows by passing file descriptors straight through in both directions
(host offer -> nested source, nested source -> host source), so no
intermediate copy is needed. */
struct clipboard_bridge {
enum bridge_backend backend;
/* nested (wlroots) seat */
struct wl_listener request_set_selection;
struct wl_listener set_selection;
struct wl_listener set_primary_selection;
/* the nested selection source currently mirrored to the host; serves
host paste requests until it is destroyed */
struct wlr_data_source *inner_src;
struct wl_listener inner_src_destroy;
bool inner_clear_requested; /* nested client asked to clear the selection */
bool ignore_next_inner; /* one-shot echo guard for host->nested clears */
/* the nested primary-selection source currently mirrored to the host;
serves host primary-selection requests (middle click) until destroyed */
struct wlr_primary_selection_source *inner_primary_src;
struct wl_listener inner_primary_src_destroy;
bool inner_primary_clear_requested;
bool primary_ignore_next_inner; /* one-shot guard for host->nested echoes */
/* host: standard wl_data_device (always bound; the fallback backend) */
struct wl_data_device_manager *ddm;
struct wl_data_device *dd;
struct wl_data_source *dd_source; /* our host-side source (nested copy) */
struct wl_data_offer *dd_offer; /* current host selection offer */
struct wl_data_offer *dd_echo_offer; /* offer describing our own set */
uint32_t kbd_serial; /* last host keyboard/enter serial */
/* host: wlr-data-control backend (if the host exposes it) */
struct zwlr_data_control_manager_v1 *dc_manager;
struct zwlr_data_control_device_v1 *dc_device;
struct zwlr_data_control_source_v1 *dc_source;
struct zwlr_data_control_offer_v1 *dc_offer;
struct zwlr_data_control_offer_v1 *dc_echo_offer;
/* host primary selection over the same data-control device (v2): our
published source, the current host offer, and the echo of our own set */
struct zwlr_data_control_source_v1 *dc_primary_source;
struct zwlr_data_control_offer_v1 *dc_primary_offer;
struct zwlr_data_control_offer_v1 *dc_primary_echo_offer;
bool dc_primary_supported; /* bound data-control version >= 2 */
/* MIME list currently being collected from a host offer */
char **mimes;
size_t mimes_len, mimes_cap;
bool dc_pending_echo; /* our own set via data-control: echo not yet consumed */
bool dd_pending_echo; /* our own set via wl_data_device: echo not yet consumed */
bool dc_primary_pending_echo; /* our own primary set: echo not yet consumed */
bool host_set_pending; /* nested selection not yet on the host; retry on focus */
/* Eager text prefetch: when a real host selection is mirrored, its primary
text MIME is pulled into this buffer at copy time so pastes are served
instantly instead of asking the host for each one. */
int prefetch_fd; /* pipe read end, -1 when idle */
struct wl_event_source *prefetch_src;
char *prefetch_buf;
size_t prefetch_len, prefetch_cap;
char prefetch_mime[64]; /* canonical text MIME, "" if none */
bool prefetch_ready; /* buffer complete (EOF received) */
/* Eager text prefetch for the mirrored primary selection. Kept separate
from the clipboard prefetch above: the host can change either selection
on its own, so their buffers must never collide. */
int primary_prefetch_fd;
struct wl_event_source *primary_prefetch_src;
char *primary_prefetch_buf;
size_t primary_prefetch_len, primary_prefetch_cap;
char primary_prefetch_mime[64];
bool primary_prefetch_ready;
};
static struct clipboard_bridge bridge = {
.prefetch_fd = -1,
.primary_prefetch_fd = -1,
};
static void bridge_cleanup(void);
static void bridge_init(void);
static void bridge_attach_seat(void);
/* Frame dumps: SIGUSR1 (or KICK_AUTODUMP) requests a scene-buffer save
(client content as wlroots drew it) and a host back-buffer save (what we
composited for the host) on the next frame. */
static volatile sig_atomic_t dump_scene_req, dump_host_req;
static int dump_seq;
static bool client_dumped = false;
/* Set by sigchld_handler whenever a child exits; the main loop clears it and
runs sweep_dead_startup_groups() to drop black tabs whose command exited
without ever connecting. A plain flag (set + cleared in the loop) keeps
the reaping work out of the signal handler. */
static volatile sig_atomic_t sigchld_seen = 0;
/* The most recently reaped child, recorded by sigchld_handler so the startup
sweep can tell the user WHY a tab's command died (usage error vs crash vs
signal). Best-effort by design: only one exit is kept, so a burst of child
exits can overwrite the entry before the sweep reads it -- the message then
just omits the status. sig_atomic_t holds pids on Linux (pid_t is int). */
static volatile sig_atomic_t last_child_pid = -1;
static volatile sig_atomic_t last_child_status = 0;
/* A tab is "live" when it can own the show: it has a surfaced window, or it
is pending (black) -- an unclaimed CLI tab at startup or a fresh
Alt+Shift+T terminal. Empty tabs are otherwise removed outright, so a
live check is all that's needed to know whether a tab should be shown,
cycled to, or handed the active crown. */
static bool tab_live(struct kick_tab *tab);
/* The currently focused toplevel (NULL while the active tab is black). */
static struct wlr_xdg_toplevel *active_toplevel(void);
static void set_active_tab(struct kick_tab *tab);
static void render_and_present(void);
static void layer_apply_layout_box(const struct wlr_box *full);
static void layer_raise_above_windows(void);
/* Request a redraw from a non-client source (kick's own UI: tab switches,
reorder, resize, overlay, boot). Marks the frame dirty and wakes the
event loop via wlr_output_schedule_frame so an idle compositor still
renders promptly; the drain of that wake presents on the next frame-ready
point instead of racing an in-flight page flip. */
static void kick_request_redraw(void) {
needs_redraw = true;
if (server.output)
wlr_output_schedule_frame(server.output);
}
static struct kick_window *window_for_toplevel(struct wlr_xdg_toplevel *toplevel);
static void host_teardown_window(void);
static int tab_index(struct kick_tab *tab);
/* xdg-dialog bodies live with the seat handlers; called from claim/map. */
static void modal_activate(struct kick_window *w);
static void dialog_wire(struct kick_window *w,
struct wlr_xdg_dialog_v1 *dialog);
/* Foreign-toplevel (taskbar) handle lifecycle; bodies live with the idle
handlers. Called from window claim/teardown and state sync points. */
static void foreign_handle_create(struct kick_window *w);
static void foreign_handle_destroy(struct kick_window *w);
static void foreign_sync_title(struct kick_window *w);
static void foreign_sync_app_id(struct kick_window *w);
static void foreign_sync_output(struct kick_window *w);
static const char *foreign_str(const char *s);
static struct kick_window *tab_current_window(struct kick_tab *tab);
static struct kick_tab *pick_successor(struct kick_tab *tab,
bool prefer_right);
static void remove_tab(struct kick_tab *tab);
static int add_tab(const char *cmd);
static void overlay_refresh_if_visible(void);
/* set_title / set_app_id listener: refresh the overlay row and mirror the
new title/app_id onto the taskbar handles. */
static void handle_window_meta(struct wl_listener *l, void *data);
static int cmd_in_path(const char *cmd);
static void insert_tab_after(struct kick_tab *tab, struct kick_tab *anchor);
static void launch_client(struct kick_window *w);
static void launch_all_cli(void);
#if HAVE_XWAYLAND
/* XWayland surface handlers (defined with the other toplevel handlers). */
static void handle_xwayland_new_surface(struct wl_listener *listener,
void *data);
static void handle_xwayland_ready(struct wl_listener *listener, void *data);
static void handle_xwayland_destroy(struct wl_listener *listener, void *data);
static void x11_initial_configure(struct wlr_xwayland_surface *xs);
#endif
/* Cursor-shape-v1: apply a wp_cursor_shape_device_v1 shape value -- setting
the standalone cursor image or forwarding it to the host pointer. */
static void apply_cursor_shape(int shape);
static void handle_shape_set(struct wl_listener *listener, void *data);
static void host_cursor_shape_get_pointer(void);
static void host_cursor_shape_set(int shape);
/* Logging levels: quiet by default so a plain launch writes nothing to the
launching terminal except fatal errors. KICK_LOG=1 shows status lines,
KICK_LOG=2 adds the per-frame [diag] trace. SIGUSR1 and KICK_AUTODUMP
dumps always write their .ppm files regardless of level. */
enum { KICK_LOG_QUIET = 0, KICK_LOG_INFO = 1, KICK_LOG_DEBUG = 2 };
static int kick_log_level(void) {
static volatile sig_atomic_t level = -1;
if (level < 0) {
const char *v = getenv("KICK_LOG");
int l = v ? atoi(v) : 0;
if (l < KICK_LOG_QUIET) l = KICK_LOG_QUIET;
if (l > KICK_LOG_DEBUG) l = KICK_LOG_DEBUG;
level = l;
}
return level;
}
static void kick_vlog(int level, const char *fmt, va_list args) {
if (level > kick_log_level())
return;
vfprintf(stderr, fmt, args);
}
static void kick_log(int level, const char *fmt, ...) {
va_list args;
va_start(args, fmt);
kick_vlog(level, fmt, args);
va_end(args);
}
/* Route libxkbcommon's own log output (which otherwise writes
"xkbcommon: ERROR: ..." straight to stderr, bypassing KICK_LOG) through
our level system. Errors surface at info level; warnings and below are
debug-only, so a quiet launch no longer leaks parse failures to the
launching terminal. */
static void kick_xkb_log(struct xkb_context *ctx, enum xkb_log_level level,
const char *fmt, va_list args)
{
(void)ctx;
int l = (level <= XKB_LOG_LEVEL_ERROR) ? KICK_LOG_INFO : KICK_LOG_DEBUG;
if (l > kick_log_level())
return;
fputs("kick: xkbcommon: ", stderr);
vfprintf(stderr, fmt, args);
}
static void kick_log_level_init(void) {
(void)kick_log_level();
}
/* The process group to signal for a window: the group its claimed client
lives in (set at claim time), falling back to the launcher pid for windows
with no client yet. */
static pid_t window_signal_group(struct kick_window *w) {
return (w && w->pgid > 0) ? w->pgid : (w ? w->pid : -1);
}
/* Whether a window has a killable target: either a process group we own, or
a connected client pid (external clients sharing our own group). */
static bool window_killable(struct kick_window *w) {
return w && (window_signal_group(w) > 0 || w->client_pid > 0);
}
/* Signal a window's process target. A group we created (launch_client runs
the child in its own setpgid'd group) is signaled as a group so the whole
client tree dies. A client we did NOT create, or one sharing our own
process group (e.g. started from the same terminal as the compositor), is
signaled by pid alone: group-signaling it would kill the launcher's
session, ourselves included. */
static void kill_window(struct kick_window *w, int sig) {
pid_t g = window_signal_group(w);
if (g > 0 && g != getpgid(0))
kill(-g, sig);
else if (w && w->client_pid > 0)
kill(w->client_pid, sig);
}
/* Terminate every launched client: SIGTERM first for a graceful shutdown,
then SIGKILL any stragglers after a short grace period. */
static void terminate_clients(void) {
struct kick_tab *t;
wl_list_for_each(t, &server.tabs, link) {
struct kick_window *w;
wl_list_for_each(w, &t->windows, link) {
if (w->pgid > 0)
kill(-w->pgid, SIGTERM);
else if (w->client_pid > 0)
kill(w->client_pid, SIGTERM);
}
}
struct timespec wait = { .tv_sec = 0, .tv_nsec = 150000000 };
nanosleep(&wait, NULL);
wl_list_for_each(t, &server.tabs, link) {
struct kick_window *w;
wl_list_for_each(w, &t->windows, link) {
if (w->pgid > 0)
kill(-w->pgid, SIGKILL);
else if (w->client_pid > 0)
kill(w->client_pid, SIGKILL);
}
}
}
/* Remove the session's Wayland socket file (and its companion .lock file,
both created by wl_display_add_socket), if present. The full path is
precomputed at startup so this only ever calls unlink()/snprintf(), which
are async-signal-safe and therefore safe from the signal/crash handlers
too. A missing file is fine: ENOENT is ignored, i.e. nothing to clean. */
static void remove_socket_file(void) {
unlink(socket_path);
char lock_path[sizeof(socket_path) + 6];
snprintf(lock_path, sizeof(lock_path), "%s.lock", socket_path);
unlink(lock_path);
}
static void overlay_font_fini(void);
static void standalone_overlay_damage(void);
/* Standalone native keyboard: one struct per libinput keyboard device, so
modifier state is always read from the device that emitted the event (the
legacy single-slot approach broke Shift/Caps when a host exposed several
keyboards, e.g. a consumer-control node alongside the real one). */
struct standalone_kbdev {
struct wlr_keyboard *keyboard;
struct wl_listener key;
struct wl_listener modifiers;
struct wl_listener destroy;
struct wl_list link;
};
/* Standalone native pointer: one struct per libinput pointer device. Each
device owns its listeners so a device going away (libinput suspends every
device when the session loses its VT) can detach them before wlroots
asserts the event lists are empty, and so all pointers -- not just the
last-attached one -- reach the seat. */
struct standalone_ptrdev {
struct wlr_pointer *pointer;
struct wl_listener motion;
struct wl_listener motion_absolute;
struct wl_listener button;
struct wl_listener axis;
struct wl_listener frame;
struct wl_listener swipe_begin;
struct wl_listener swipe_update;
struct wl_listener swipe_end;
struct wl_listener pinch_begin;
struct wl_listener pinch_update;
struct wl_listener pinch_end;
struct wl_listener hold_begin;
struct wl_listener hold_end;
struct wl_listener destroy;
struct wl_list link;
};
/* One libinput touchscreen; events carry normalized absolute coordinates
plus a slot id (multi-touch). Delivery goes through
seat_touch_deliver(), shared with the nested forwarder and ctl feed. */
struct standalone_touchdev {
struct wlr_touch *touch;
struct wl_listener down;
struct wl_listener motion;
struct wl_listener up;
struct wl_listener destroy;
struct wl_list link;
};
/* ===================== View helpers (xdg / X11) ===================== */
/* A window is an xdg toplevel or, with XWayland, an Xwayland surface.
These helpers keep the shared window logic (liveness, focus, overlay
titles, sizing, fullscreen) identical for both; the X11 branches compile
away without HAVE_XWAYLAND. */
/* Whether a window has a live surface object: an xdg toplevel exists from
claim until destroy, an X11 surface likewise. This is the per-window
liveness predicate the old app_has_window() summarized for a whole tab. */
static bool window_live(struct kick_window *w) {
if (!w) return false;
if (w->toplevel) return true;
#if HAVE_XWAYLAND
if (w->xsurface) return true;
#endif
return false;
}
/* Live windows across every tab, for the confirm-before-quit count: a window
that holds (or is about to hold) a surface and is not already closing.
Still-black pending placeholders have no surface yet, so they do not count
-- there is nothing to lose by quitting for them. */
static int live_window_count(void) {
int n = 0;
struct kick_tab *t;
wl_list_for_each(t, &server.tabs, link) {
struct kick_window *w;
wl_list_for_each(w, &t->windows, link)
if (window_live(w) && !w->closing)
n++;
}
return n;
}
/* The first (oldest) window of a tab, or NULL. The tab's launcher identity
(cmd, pending_claim) lives on it. */
static struct kick_window *tab_first_window(struct kick_tab *tab) {
if (!tab || wl_list_empty(&tab->windows)) return NULL;
return wl_container_of(tab->windows.next, (struct kick_window *)NULL, link);
}
/* Whether the tab is currently shown: any of its windows' scene trees are
enabled. A black (pending) tab has no tree yet and so is not visible,
which is exactly what the map handlers check to decide no-steal
activation. */
static bool tab_visible(struct kick_tab *tab) {
if (!tab) return false;
struct kick_window *w;
wl_list_for_each(w, &tab->windows, link)
if (w->tree && w->tree->node.enabled) return true;
return false;
}
static struct wlr_surface *window_surface(struct kick_window *w) {
if (!w) return NULL;
if (w->toplevel) return w->toplevel->base->surface;
#if HAVE_XWAYLAND
if (w->is_x11)
return w->xsurface ? w->xsurface->surface : NULL;
#endif
return NULL;
}
static const char *window_title(struct kick_window *w) {
if (!w) return NULL;
if (w->toplevel) return w->toplevel->title;
#if HAVE_XWAYLAND
if (w->is_x11)
return w->xsurface ? w->xsurface->title : NULL;
#endif
return NULL;
}
static const char *window_app_id(struct kick_window *w) {
if (!w) return NULL;
if (w->toplevel) return w->toplevel->app_id;
#if HAVE_XWAYLAND
if (w->is_x11)
return w->xsurface ? w->xsurface->class : NULL;
#endif
return NULL;
}
static void window_set_activated(struct kick_window *w, bool on) {
if (!w) return;
if (w->ft_handle)
wlr_foreign_toplevel_handle_v1_set_activated(w->ft_handle, on);
if (w->toplevel) {
wlr_xdg_toplevel_set_activated(w->toplevel, on);
return;
}
#if HAVE_XWAYLAND
if (w->is_x11 && w->xsurface)
wlr_xwayland_surface_activate(w->xsurface, on);
#endif
}
static void window_set_maximized(struct kick_window *w, bool on) {
if (!w) return;
if (w->toplevel) {
wlr_xdg_toplevel_set_maximized(w->toplevel, on);
return;
}
#if HAVE_XWAYLAND
if (w->is_x11 && w->xsurface)
wlr_xwayland_surface_set_maximized(w->xsurface, on, on);
#endif
}
static void window_set_fullscreen(struct kick_window *w, bool on) {
if (!w) return;
if (w->toplevel) {
if (!w->toplevel->base->initialized) return;
wlr_xdg_toplevel_set_fullscreen(w->toplevel, on);
return;
}
#if HAVE_XWAYLAND
if (w->is_x11 && w->xsurface)
wlr_xwayland_surface_set_fullscreen(w->xsurface, on);
#endif
}
/* Keep a mapped window at the maximized output size. XDG clients are told
via set_size; X11 clients get a configure to the full output at 0,0. */
static void window_set_size(struct kick_window *w, int width, int height) {
if (!w) return;
if (w->toplevel) {
wlr_xdg_toplevel_set_size(w->toplevel, width, height);
return;
}
#if HAVE_XWAYLAND
if (w->is_x11 && w->xsurface && w->xsurface->surface)
wlr_xwayland_surface_configure(w->xsurface, 0, 0,
(uint16_t)width, (uint16_t)height);
#endif
}
/* Whether the underlying protocol object accepts state: xdg surfaces only
after base->initialized; X11 surfaces once associated with a wlr_surface. */
static bool window_initialized(struct kick_window *w) {
if (!w) return false;
if (w->toplevel) return w->toplevel->base->initialized;
#if HAVE_XWAYLAND
if (w->is_x11)
return w->xsurface && w->xsurface->surface != NULL;
#endif
return false;
}
/* Graceful close for the surface kind: XDG windows get an xdg-toplevel
close request, X11 windows WM_DELETE_WINDOW. This is what lets a
stacked member be closed without touching its shared process. */
static void window_graceful_close(struct kick_window *w) {
if (!w) return;
if (w->toplevel && w->toplevel->base->initialized)
wlr_xdg_toplevel_send_close(w->toplevel);
#if HAVE_XWAYLAND
if (w->is_x11 && w->xsurface)
wlr_xwayland_surface_close(w->xsurface);
#endif
}
/* A tab is live when any of its windows is: a surface object exists, or it
is still pending (black). Empty tabs are removed outright, so a live
check is all that's needed to know whether the tab should be shown,
cycled to, or handed the active crown. */
static bool tab_live(struct kick_tab *tab) {
if (!tab) return false;
struct kick_window *w;
wl_list_for_each(w, &tab->windows, link)
if (window_live(w) || w->pending_claim) return true;
return false;
}
static struct wlr_xdg_toplevel *active_toplevel(void) {
struct kick_window *w = tab_current_window(server.active_tab);
return w ? w->toplevel : NULL;
}
/* Full shutdown of the nested session: take down the clients first, then
free our own allocations and exit. Guarded so the various close paths
(host window close, last tab closed) only run once. */
static void shutdown_cleanup(void) {
if (shutting_down) return;
shutting_down = true;
terminate_clients();
struct kick_tab *tab, *tab_tmp;
wl_list_for_each_safe(tab, tab_tmp, &server.tabs, link) {
struct kick_window *w, *w_tmp;
wl_list_for_each_safe(w, w_tmp, &tab->windows, link) {
if (w->icon_wlr) {
wlr_texture_destroy(w->icon_wlr);
w->icon_wlr = NULL;
}
free(w->cmd);
free(w);
}
free(tab);
}
wl_list_init(&server.tabs);
/* Detach + free the standalone native keyboard devices. */
struct standalone_kbdev *kd, *kd_tmp;
wl_list_for_each_safe(kd, kd_tmp, &server.kbdevs, link) {
wl_list_remove(&kd->link);
wl_list_remove(&kd->key.link);
wl_list_remove(&kd->modifiers.link);
wl_list_remove(&kd->destroy.link);
free(kd);
}
wl_list_init(&server.kbdevs);
/* Detach + free the standalone native pointer devices. */
struct standalone_ptrdev *pd, *pd_tmp;
wl_list_for_each_safe(pd, pd_tmp, &server.ptrdevs, link) {
wl_list_remove(&pd->link);
wl_list_remove(&pd->motion.link);
wl_list_remove(&pd->motion_absolute.link);
wl_list_remove(&pd->button.link);
wl_list_remove(&pd->axis.link);
wl_list_remove(&pd->frame.link);
wl_list_remove(&pd->destroy.link);
free(pd);
}
wl_list_init(&server.ptrdevs);
/* Detach + free the standalone native touchscreen devices. */
struct standalone_touchdev *td, *td_tmp;
wl_list_for_each_safe(td, td_tmp, &server.touchdevs, link) {
wl_list_remove(&td->link);
wl_list_remove(&td->down.link);
wl_list_remove(&td->motion.link);
wl_list_remove(&td->up.link);
wl_list_remove(&td->destroy.link);
free(td);
}
wl_list_init(&server.touchdevs);
if (server.overlay_atlas_wlr) {
wlr_texture_destroy(server.overlay_atlas_wlr);
server.overlay_atlas_wlr = NULL;
}
if (server.xkb_state) xkb_state_unref(server.xkb_state);
if (server.xkb_keymap) xkb_keymap_unref(server.xkb_keymap);
if (server.xkb_ctx) xkb_context_unref(server.xkb_ctx);
overlay_font_fini();
bridge_cleanup();
remove_socket_file();
}
/* ===================== EGL helpers ===================== */
static PFNEGLCREATEIMAGEKHRPROC pfn_eglCreateImageKHR;
static PFNEGLDESTROYIMAGEKHRPROC pfn_eglDestroyImageKHR;
static PFNEGLGETPLATFORMDISPLAYEXTPROC pfn_eglGetPlatformDisplayEXT;
static PFNGLEGLIMAGETARGETTEXTURE2DOESPROC pfn_glEGLImageTargetTexture2DOES;
static void *egl_proc(const char *name) {
void *p = (void *)eglGetProcAddress(name);
if (!p)
fprintf(stderr, "kick: EGL proc %s unavailable\n", name);
return p;
}
static GLuint compile_shader(GLenum type, const char *src) {
GLuint sh = glCreateShader(type);
glShaderSource(sh, 1, &src, NULL);
glCompileShader(sh);
GLint ok;
glGetShaderiv(sh, GL_COMPILE_STATUS, &ok);
if (!ok) {
char log[512];
glGetShaderInfoLog(sh, sizeof(log), NULL, log);
fprintf(stderr, "kick: shader error: %s\n", log);
glDeleteShader(sh);
return 0;
}
return sh;
}
static bool gl_setup(void) {
const char *vs =
"attribute vec2 a_pos;\n"
"attribute vec2 a_uv;\n"
"varying vec2 v_uv;\n"
"void main() {\n"
" v_uv = a_uv;\n"
" gl_Position = vec4(a_pos, 0.0, 1.0);\n"
"}\n";
const char *fs =
"precision mediump float;\n"
"varying vec2 v_uv;\n"
"uniform sampler2D u_tex;\n"
"uniform vec4 u_color;\n"
"void main() {\n"
" gl_FragColor = texture2D(u_tex, v_uv) * u_color;\n"
"}\n";
GLuint vsh = compile_shader(GL_VERTEX_SHADER, vs);
GLuint fsh = compile_shader(GL_FRAGMENT_SHADER, fs);
if (!vsh || !fsh) return false;
host.gl_program = glCreateProgram();
glAttachShader(host.gl_program, vsh);
glAttachShader(host.gl_program, fsh);
glBindAttribLocation(host.gl_program, 0, "a_pos");
glBindAttribLocation(host.gl_program, 1, "a_uv");
glLinkProgram(host.gl_program);
GLint ok;
glGetProgramiv(host.gl_program, GL_LINK_STATUS, &ok);
glDeleteShader(vsh);
glDeleteShader(fsh);
if (!ok) {
char log[512];
glGetProgramInfoLog(host.gl_program, sizeof(log), NULL, log);
fprintf(stderr, "kick: link error: %s\n", log);
return false;
}
host.gl_pos_loc = glGetAttribLocation(host.gl_program, "a_pos");
host.gl_uv_loc = glGetAttribLocation(host.gl_program, "a_uv");
host.gl_tex_loc = glGetUniformLocation(host.gl_program, "u_tex");
host.gl_color_loc = glGetUniformLocation(host.gl_program, "u_color");
glGenTextures(1, &host.import_tex);
glBindTexture(GL_TEXTURE_2D, host.import_tex);
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR);
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_LINEAR);
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, GL_CLAMP_TO_EDGE);
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, GL_CLAMP_TO_EDGE);
glBindTexture(GL_TEXTURE_2D, 0);
return true;
}
/* Blit a source rect of a texture into the window at the given destination
rect (dst_x, dst_y, dst_w, dst_h, window coords), clipped to the window.
The source is stretched uniformly to the destination (1:1 when the rects
match). The draw is tinted by `color` (RGBA), so solid rects are drawn
from a 1x1 white texture and text glyphs from the font atlas. */
static void draw_texture_rect(GLuint tex, int tex_w, int tex_h,
int src_x, int src_y, int src_w, int src_h,
int dst_x, int dst_y, int dst_w, int dst_h,
int win_w, int win_h, const GLfloat color[4])
{
if (win_w <= 0 || win_h <= 0) return;
if (src_w <= 0 || src_h <= 0 || dst_w <= 0 || dst_h <= 0) return;
if (src_x >= tex_w || src_y >= tex_h) return;
if (src_w > tex_w - src_x) src_w = tex_w - src_x;
if (src_h > tex_h - src_y) src_h = tex_h - src_y;
int cx = dst_x < 0 ? -dst_x : 0;
int cy = dst_y < 0 ? -dst_y : 0;
if (cx >= dst_w || cy >= dst_h) return;
int wx0 = dst_x + cx;
int wy0 = dst_y + cy;
int cw = dst_w - cx;
int ch = dst_h - cy;
int maxw = win_w - wx0;
int maxh = win_h - wy0;
if (cw > maxw) cw = maxw;
if (ch > maxh) ch = maxh;
if (cw <= 0 || ch <= 0) return;
float u0 = ((float)src_x + (float)src_w * cx / dst_w) / (float)tex_w;
float u1 = ((float)src_x + (float)src_w * (cx + cw) / dst_w) / (float)tex_w;
float v0 = ((float)src_y + (float)src_h * cy / dst_h) / (float)tex_h;
float v1 = ((float)src_y + (float)src_h * (cy + ch) / dst_h) / (float)tex_h;
float nx0 = -1.0f + 2.0f * (float)wx0 / (float)win_w;
float ny0 = 1.0f - 2.0f * (float)wy0 / (float)win_h;
float nx1 = -1.0f + 2.0f * (float)(wx0 + cw) / (float)win_w;
float ny1 = 1.0f - 2.0f * (float)(wy0 + ch) / (float)win_h;
GLfloat verts[8] = {
nx0, ny0,
nx1, ny0,
nx1, ny1,
nx0, ny1,
};
GLfloat uvs[8] = {
u0, v0,
u1, v0,
u1, v1,
u0, v1,
};
GLushort idx[6] = { 0, 1, 2, 0, 2, 3 };
glUseProgram(host.gl_program);
glActiveTexture(GL_TEXTURE0);
glBindTexture(GL_TEXTURE_2D, tex);
glUniform1i(host.gl_tex_loc, 0);
glUniform4fv(host.gl_color_loc, 1, color);
glVertexAttribPointer(0, 2, GL_FLOAT, GL_FALSE, 0, verts);
glEnableVertexAttribArray(0);
glVertexAttribPointer(1, 2, GL_FLOAT, GL_FALSE, 0, uvs);
glEnableVertexAttribArray(1);
glDrawElements(GL_TRIANGLES, 6, GL_UNSIGNED_SHORT, idx);
glDisableVertexAttribArray(0);
glDisableVertexAttribArray(1);
}
/* ============ Alt-held tab-title overlay ============
While the host Alt modifier is held, a passive list of tab titles is
drawn into the top-left of the host window with the active tab
highlighted. Up/Down already cycle tabs while Alt is held, so the
highlight follows server.active_tab automatically. Titles are read from
the wlr_xdg_toplevel at draw time (terminals retitle themselves); a
still-black tab shows its command line instead. No per-client listeners
are needed. */
static FT_Library overlay_ft_lib;
static FT_Face overlay_ft_face;
static bool overlay_font_ok;
/* Fixed rasterized font size; 30px is twice the original 15px constant. */
#define OVERLAY_FONT_PX 30
static const char *overlay_pick_font(void) {
static const char *const paths[] = {
"/usr/share/fonts/truetype/dejavu/DejaVuSans.ttf",
"/usr/share/fonts/dejavu/DejaVuSans.ttf",
"/usr/share/fonts/TTF/DejaVuSans.ttf",
"/usr/share/fonts/truetype/liberation/LiberationSans-Regular.ttf",
"/usr/share/fonts/truetype/liberation2/LiberationSans-Regular.ttf",
"/usr/share/fonts/liberation/LiberationSans-Regular.ttf",
"/usr/share/fonts/noto/NotoSans-Regular.ttf",
};
const char *env = getenv("KICK_FONT");
if (env && access(env, R_OK) == 0)
return env;
for (size_t i = 0; i < sizeof(paths) / sizeof(paths[0]); i++)
if (access(paths[i], R_OK) == 0)
return paths[i];
return NULL;
}
/* Build the ASCII glyph atlas (chars 32..126) from the chosen system font.
Must be called with the host EGL context current. Non-fatal: on failure
the overlay still renders its boxes, just without text. */
static void overlay_font_init(void) {
static bool overlay_font_done;
if (overlay_font_done) return;
overlay_font_done = true;
int px = OVERLAY_FONT_PX;
static const char *overlay_font_path = NULL;
if (!overlay_ft_lib) {
const char *path = overlay_pick_font();
if (!path) {
kick_log(KICK_LOG_INFO, "[overlay] no font found; "
"set KICK_FONT to enable overlay text\n");
return;
}
overlay_font_path = path;
if (FT_Init_FreeType(&overlay_ft_lib) != 0) {
kick_log(KICK_LOG_INFO, "[overlay] FreeType init failed\n");
return;
}
if (FT_New_Face(overlay_ft_lib, path, 0, &overlay_ft_face) != 0) {
kick_log(KICK_LOG_INFO, "[overlay] cannot load font %s\n", path);
FT_Done_FreeType(overlay_ft_lib);
overlay_ft_lib = NULL;
return;
}
}
if (FT_Set_Pixel_Sizes(overlay_ft_face, 0, px) != 0) {
kick_log(KICK_LOG_INFO, "[overlay] cannot set pixel size %d\n", px);
return;
}
int height = (int)(overlay_ft_face->size->metrics.height / 64.0f) + 1;
int asc = (int)(overlay_ft_face->size->metrics.ascender / 64.0f);
int adv_max = 0;
for (int c = 32; c <= 126; c++) {
if (FT_Load_Char(overlay_ft_face, c, FT_LOAD_DEFAULT) == 0) {
int adv = (int)(overlay_ft_face->glyph->advance.x / 64.0f);
if (adv > adv_max) adv_max = adv;
}
}
if (adv_max <= 0) adv_max = 8;
int cell_w = adv_max + 3;
int cell_h = height + 3;
int cols = 16;
int rows = (95 + cols - 1) / cols;
int atlas_w = cols * cell_w;
int atlas_h = rows * cell_h;
unsigned char *atlas = calloc((size_t)atlas_w * atlas_h * 2, 1);
if (!atlas) {
kick_log(KICK_LOG_INFO, "[overlay] atlas alloc failed\n");
return;
}
int n_glyphs = 0;
for (int c = 32; c <= 126; c++) {
struct overlay_glyph *g = &host.overlay_glyphs[c - 32];
if (FT_Load_Char(overlay_ft_face, c, FT_LOAD_RENDER) != 0)
continue;
FT_Bitmap *bmp = &overlay_ft_face->glyph->bitmap;
/* A bitmap wider/taller than its cell would corrupt the glyphs it
spills into; skip such glyphs rather than damage the atlas. */
if ((int)bmp->width > cell_w - 2 || (int)bmp->rows > cell_h - 2)
continue;
int cell = c - 32;
int cx = (cell % cols) * cell_w;
int cy = (cell / cols) * cell_h;
g->ax = cx + 1;
g->ay = cy + 1;
g->pw = bmp->width;
g->ph = bmp->rows;
g->adv = (int)(overlay_ft_face->glyph->advance.x / 64.0f);
g->top = asc - overlay_ft_face->glyph->bitmap_top;
/* Cells are GL_LUMINANCE_ALPHA, so each 8-bit alpha is duplicated. */
for (int r = 0; r < (int)bmp->rows; r++) {
const unsigned char *src = bmp->buffer + (size_t)r * bmp->pitch;
unsigned char *dst = atlas
+ ((size_t)(g->ay + r) * atlas_w + g->ax) * 2;
for (int x = 0; x < (int)bmp->width; x++) {
dst[x * 2 + 0] = src[x];
dst[x * 2 + 1] = src[x];
}
}
n_glyphs++;
}
if (n_glyphs == 0) {
free(atlas);
return;
}
/* Hand the glyph bitmap to the wlroots renderer as a premultiplied-
white texture (r=g=b=a); the render pass tints it via alpha alone. */
{
unsigned char *rgba = malloc((size_t)atlas_w * atlas_h * 4);
if (rgba) {
for (size_t i = 0; i < (size_t)atlas_w * atlas_h; i++) {
unsigned char v = atlas[i * 2];
rgba[i * 4 + 0] = v;
rgba[i * 4 + 1] = v;
rgba[i * 4 + 2] = v;
rgba[i * 4 + 3] = v;
}
server.overlay_atlas_wlr = wlr_texture_from_pixels(
server.renderer, DRM_FORMAT_ARGB8888,
(uint32_t)atlas_w * 4, (uint32_t)atlas_w, (uint32_t)atlas_h,
rgba);
}
free(rgba);
free(atlas);
host.overlay_font_h = height;
overlay_font_ok = server.overlay_atlas_wlr != NULL;
kick_log(KICK_LOG_INFO, "[overlay] font %s glyphs=%d atlas=%dx%d\n",
overlay_font_path, n_glyphs, atlas_w, atlas_h);
}
}
static void overlay_font_fini(void) {
if (overlay_ft_face) {
FT_Done_Face(overlay_ft_face);
overlay_ft_face = NULL;
}
if (overlay_ft_lib) {
FT_Done_FreeType(overlay_ft_lib);
overlay_ft_lib = NULL;
}
overlay_font_ok = false;
}
/* ===================== Overlay app icons ===================== */
/* Drawn square of the icon slot, in host pixels. */
#define OVERLAY_ICON_SZ 28
#ifndef MIN
#define MIN(a, b) ((a) < (b) ? (a) : (b))
#endif
static char *overlay_strndup(const char *s, size_t n) {
char *r = malloc(n + 1);
if (r) {
memcpy(r, s, n);
r[n] = '\0';
}
return r;
}
static bool overlay_endswith(const char *s, const char *suffix) {
size_t ls = strlen(s), lx = strlen(suffix);
return ls >= lx && strcmp(s + ls - lx, suffix) == 0;
}
/* Read the Icon= value (case-sensitive, not the localized Icon[lang]= form)
out of a .desktop file, malloc'd, or NULL. */
static char *desktop_icon_from_file(FILE *f) {
char line[1024];
while (fgets(line, sizeof(line), f)) {
if (strncmp(line, "Icon=", 5) != 0)
continue;
if (line[5] == '[') /* Icon[locale]= */
continue;
size_t n = strlen(line);
while (n > 5 && (line[n - 1] == '\n' || line[n - 1] == '\r' ||
line[n - 1] == ' ' || line[n - 1] == '\t'))
n--;
return overlay_strndup(line + 5, n - 5);
}
return NULL;
}
/* Find `<app_id>.desktop` under an XDG data dir and return its Icon= value,
or NULL. */
static char *desktop_icon_name(const char *app_id) {
const char *data_home = getenv("XDG_DATA_HOME");
const char *data_dirs = getenv("XDG_DATA_DIRS");
if (!data_dirs || !data_dirs[0])
data_dirs = "/usr/local/share:/usr/share";
char buf[4096];
if (data_home && data_home[0]) {
snprintf(buf, sizeof(buf), "%s/applications/%s.desktop",
data_home, app_id);
FILE *f = fopen(buf, "r");
if (f) {
char *icon = desktop_icon_from_file(f);
fclose(f);
if (icon) return icon;
}
}
char *copy = strdup(data_dirs);
if (!copy) return NULL;
for (char *p = copy, *dir; p; p = dir) {
dir = strchr(p, ':');
if (dir) *dir++ = '\0';
if (p[0]) {
snprintf(buf, sizeof(buf), "%s/applications/%s.desktop", p, app_id);
FILE *f = fopen(buf, "r");
if (f) {
char *icon = desktop_icon_from_file(f);
fclose(f);
if (icon) {
free(copy);
return icon;
}
}
}
}
free(copy);
return NULL;
}
/* Turn an Icon= value (theme name, bare filename or absolute path) into a
loadable .png/.svg path, or NULL. */
static char *overlay_find_icon_file(const char *name) {
static const char *const themes[] = { "Adwaita", "hicolor", "default" };
static const char *const sizes[] =
{ "scalable", "48x48", "32x32", "24x24" };
static const char *const exts[] = { "png", "svg" };
char roots[8][512];
int n_roots = 0;
const char *data_home = getenv("XDG_DATA_HOME");
const char *data_dirs = getenv("XDG_DATA_DIRS");
if (data_home && data_home[0] && n_roots < 8)
snprintf(roots[n_roots++], sizeof(roots[0]), "%s/icons", data_home);
if (!data_dirs || !data_dirs[0])
data_dirs = "/usr/local/share:/usr/share";
char *copy = strdup(data_dirs);
for (char *p = copy, *dir; p && n_roots < 8; p = dir) {
dir = strchr(p, ':');
if (dir) *dir++ = '\0';
if (p[0])
snprintf(roots[n_roots++], sizeof(roots[0]), "%s/icons", p);
}
free(copy);
if (strchr(name, '/') && access(name, R_OK) == 0 &&
(overlay_endswith(name, ".png") ||
overlay_endswith(name, ".svg")))
return strdup(name);
char buf[4096];
for (int tr = 0; tr < n_roots; tr++) {
for (size_t t = 0; t < sizeof(themes) / sizeof(themes[0]); t++) {
for (size_t s = 0; s < sizeof(sizes) / sizeof(sizes[0]); s++) {
for (size_t e = 0; e < sizeof(exts) / sizeof(exts[0]); e++) {
snprintf(buf, sizeof(buf), "%s/%s/%s/apps/%s.%s",
roots[tr], themes[t], sizes[s], name, exts[e]);
if (access(buf, R_OK) == 0)
return strdup(buf);
}
}
}
}
static const char *const pixmap_roots[] = {
"/usr/share/pixmaps", "/usr/local/share/pixmaps",
};
for (size_t pr = 0; pr < sizeof(pixmap_roots) / sizeof(pixmap_roots[0]); pr++) {
for (size_t e = 0; e < sizeof(exts) / sizeof(exts[0]); e++) {
snprintf(buf, sizeof(buf), "%s/%s.%s", pixmap_roots[pr], name, exts[e]);
if (access(buf, R_OK) == 0)
return strdup(buf);
}
}
return NULL;
}
/* Decode a PNG into straight (non-premultiplied) RGBA8, malloc'd. */
static unsigned char *overlay_load_png(const char *path, int *w, int *h) {
FILE *f = fopen(path, "rb");
if (!f) return NULL;
png_structp png = png_create_read_struct(PNG_LIBPNG_VER_STRING, NULL, NULL,
NULL);
if (!png) {
fclose(f);
return NULL;
}
png_infop info = png_create_info_struct(png);
if (!info) {
png_destroy_read_struct(&png, NULL, NULL);
fclose(f);
return NULL;
}
if (setjmp(png_jmpbuf(png))) {
png_destroy_read_struct(&png, &info, NULL);
fclose(f);
return NULL;
}
png_init_io(png, f);
png_read_info(png, info);
int bw = (int)png_get_image_width(png, info);
int bh = (int)png_get_image_height(png, info);
png_byte ct = png_get_color_type(png, info);
png_byte bd = png_get_bit_depth(png, info);
if (ct == PNG_COLOR_TYPE_PALETTE)
png_set_palette_to_rgb(png);
if (ct == PNG_COLOR_TYPE_GRAY && bd < 8)
png_set_expand_gray_1_2_4_to_8(png);
if (png_get_valid(png, info, PNG_INFO_tRNS))
png_set_tRNS_to_alpha(png);
if (bd == 16)
png_set_strip_16(png);
if (ct == PNG_COLOR_TYPE_RGB || ct == PNG_COLOR_TYPE_GRAY)
png_set_filler(png, 0xff, PNG_FILLER_AFTER);
if (ct == PNG_COLOR_TYPE_GRAY || ct == PNG_COLOR_TYPE_GRAY_ALPHA)
png_set_gray_to_rgb(png);
png_read_update_info(png, info);
size_t rowbytes = png_get_rowbytes(png, info);
size_t size = (size_t)bh * rowbytes;
unsigned char *rgba = malloc(size);
if (!rgba) {
png_destroy_read_struct(&png, &info, NULL);
fclose(f);
return NULL;
}
png_bytep *rows = malloc(sizeof(png_bytep) * (size_t)bh);
if (!rows) {
free(rgba);
png_destroy_read_struct(&png, &info, NULL);
fclose(f);
return NULL;
}
for (int y = 0; y < bh; y++)
rows[y] = rgba + (size_t)y * rowbytes;
png_read_image(png, rows);
free(rows);
png_destroy_read_struct(&png, &info, NULL);
fclose(f);
*w = bw;
*h = bh;
return rgba;
}
/* Decode an SVG into straight RGBA8 at its intrinsic size, malloc'd. */
static unsigned char *overlay_load_svg(const char *path, int *w, int *h) {
GError *err = NULL;
RsvgHandle *handle = rsvg_handle_new_from_file(path, &err);
if (!handle || err) {
if (err) g_error_free(err);
return NULL;
}
double iw = 0, ih = 0;
if (!rsvg_handle_get_intrinsic_size_in_pixels(handle, &iw, &ih))
iw = ih = 48.0; /* dimension-less SVG: assume an icon-sized square */
if (iw <= 0 || ih <= 0) {
g_object_unref(handle);
return NULL;
}
int bw = (int)iw, bh = (int)ih;
cairo_surface_t *surf =
cairo_image_surface_create(CAIRO_FORMAT_ARGB32, bw, bh);
if (cairo_surface_status(surf) != CAIRO_STATUS_SUCCESS) {
cairo_surface_destroy(surf);
g_object_unref(handle);
return NULL;
}
cairo_t *cr = cairo_create(surf);
RsvgRectangle viewport = { 0, 0, iw, ih };
if (!rsvg_handle_render_document(handle, cr, &viewport, &err)) {
if (err) g_error_free(err);
cairo_destroy(cr);
cairo_surface_destroy(surf);
g_object_unref(handle);
return NULL;
}
cairo_destroy(cr);
cairo_surface_flush(surf);
/* Cairo's ARGB32 is premultiplied, little-endian byte order B,G,R,A. */
int n = bw * bh;
unsigned char *rgba = malloc(sizeof(unsigned char) * 4 * (size_t)n);
if (rgba) {
unsigned char *src = cairo_image_surface_get_data(surf);
for (int i = 0; i < n; i++) {
unsigned char a = src[i * 4 + 3];
unsigned char r = src[i * 4 + 2];
unsigned char g = src[i * 4 + 1];
unsigned char b = src[i * 4 + 0];
if (a > 0) {
r = (unsigned char)MIN((r * 255 + a / 2) / a, 255);
g = (unsigned char)MIN((g * 255 + a / 2) / a, 255);
b = (unsigned char)MIN((b * 255 + a / 2) / a, 255);
}
rgba[i * 4 + 0] = r;
rgba[i * 4 + 1] = g;
rgba[i * 4 + 2] = b;
rgba[i * 4 + 3] = a;
}
}
cairo_surface_destroy(surf);
g_object_unref(handle);
*w = bw;
*h = bh;
return rgba;
}
/* Resolve and upload `app`'s icon as a GL_RGBA texture (host EGL context
must be current). Best-effort: on any failure the app keeps no icon and
the overlay draws the placeholder instead. */
/* Resolve and upload an overlay icon for `app_id` into the supplied outputs.
Shared by the per-tab and per-window loaders so each tab-group window can
show its own icon; sets *tex (nested GL path) or *wlr (standalone path),
leaving the unused one NULL. */
static void overlay_make_icon(const char *app_id,
int *ow, int *oh,
struct wlr_texture **wlr) {
*ow = 0; *oh = 0; *wlr = NULL;
if (!app_id || !app_id[0])
return;
char *icon = desktop_icon_name(app_id);
char *path = overlay_find_icon_file(icon ? icon : app_id);
free(icon);
if (!path)
return;
int w = 0, h = 0;
unsigned char *rgba = NULL;
if (overlay_endswith(path, ".svg"))
rgba = overlay_load_svg(path, &w, &h);
else if (overlay_endswith(path, ".png"))
rgba = overlay_load_png(path, &w, &h);
free(path);
if (!rgba || w <= 0 || h <= 0) {
free(rgba);
return;
}
/* Hand the icon to the wlroots renderer as a premultiplied ARGB
texture (B,G,R,A byte order). */
unsigned char *pre = malloc((size_t)w * h * 4);
if (pre) {
for (int i = 0; i < w * h; i++) {
unsigned char a = rgba[i * 4 + 3];
if (a == 0) {
pre[i * 4 + 0] = 0;
pre[i * 4 + 1] = 0;
pre[i * 4 + 2] = 0;
pre[i * 4 + 3] = 0;
} else {
pre[i * 4 + 0] = (unsigned char)(rgba[i * 4 + 2] * a / 255);
pre[i * 4 + 1] = (unsigned char)(rgba[i * 4 + 1] * a / 255);
pre[i * 4 + 2] = (unsigned char)(rgba[i * 4 + 0] * a / 255);
pre[i * 4 + 3] = a;
}
}
*wlr = wlr_texture_from_pixels(server.renderer,
DRM_FORMAT_ARGB8888, (uint32_t)w * 4, (uint32_t)w,
(uint32_t)h, pre);
free(pre);
}
free(rgba);
*ow = w; *oh = h;
}
static void overlay_icon_load_window(struct kick_window *w) {
w->icon_resolved = true;
const char *id = window_app_id(w);
snprintf(w->icon_app_id, sizeof(w->icon_app_id), "%s", id ? id : "");
overlay_make_icon(w->icon_app_id,
&w->icon_w, &w->icon_h, &w->icon_wlr);
if (w->icon_wlr)
kick_log(KICK_LOG_INFO, "[overlay] icon %s %dx%d\n",
w->icon_app_id, w->icon_w, w->icon_h);
}
static int overlay_text_width(const char *s) {
if (!overlay_font_ok) return 0;
int w = 0;
for (const unsigned char *p = (const unsigned char *)s; *p; p++) {
int c = *p;
if (c < 32 || c > 126) {
w += 4;
continue;
}
w += host.overlay_glyphs[c - 32].adv;
}
return w;
}
/* Copy `src` into `out`, truncated so that its on-screen width plus a
trailing "..." fits within `max_px` when the title does not already fit
whole. Uses the same advance rules as overlay_text_width(). A title that
fits within `max_px` is copied verbatim, so a row sized to a title's natural
width never grows a needless ellipsis (e.g. "foot" staying "foot" instead of
shrinking to "fo..."). Falls back to an empty string when not even one dot
fits. */
static void fit_text(const char *src, int max_px, char *out, int out_sz)
{
out[0] = '\0';
if (!src || out_sz <= 1) return;
if (overlay_text_width(src) <= max_px) {
size_t n = 0;
for (const unsigned char *p = (const unsigned char *)src; *p; p++) {
if (n + 1 >= (size_t)out_sz)
break;
out[n++] = (char)*p;
}
out[n] = '\0';
return;
}
const char *dots = "...";
int dot_w = 0;
for (const unsigned char *p = (const unsigned char *)dots; *p; p++) {
int c = *p;
if (c < 32 || c > 126) { dot_w += 4; continue; }
dot_w += host.overlay_glyphs[c - 32].adv;
}
if (max_px < dot_w) return;
kick_log(KICK_LOG_DEBUG, "[overlay] ellipsis: '%s' budget=%d\n",
src, max_px);
int w = 0;
size_t n = 0;
const unsigned char *p;
for (p = (const unsigned char *)src; *p; p++) {
int c = *p;
int adv = (c < 32 || c > 126) ? 4 : host.overlay_glyphs[c - 32].adv;
if (w + adv + dot_w > max_px)
break;
if (n + 1 >= (size_t)out_sz)
break;
out[n++] = (char)c;
w += adv;
}
if (*p) {
if (n + 4 < (size_t)out_sz) {
memcpy(out + n, dots, 3);
n += 3;
}
}
out[n] = '\0';
}
/* Row title for an overlay tab: the window the tab is actually showing --
on the active tab that is its focused window; a background tab previews
its current window, what switching over would show -- or the command
line for a still-black (pending) tab. Logs one INFO line whenever a
row's resolved title changes, so a stacked window swapping the title
underneath an unchanged tab is observable in logs and tests. */
static const char *tab_row_title(struct kick_tab *tab) {
const char *t = NULL;
struct kick_window *pick = tab_current_window(tab);
const char *st = pick ? window_title(pick) : NULL;
if (pick && st && st[0])
t = st;
struct kick_window *first = tab_first_window(tab);
if (!t && first && first->cmd && first->cmd[0])
t = first->cmd;
const char *cur = t ? t : "";
if (pick && strcmp(cur, pick->row_title) != 0) {
kick_log(KICK_LOG_INFO, "[title] app=%d '%s'\n",
tab_index(tab), cur);
snprintf(pick->row_title, sizeof(pick->row_title), "%s", cur);
}
return t;
}
static bool overlay_window_icon_needs_load(struct kick_window *w) {
if (!w->icon_resolved)
return true;
const char *id = window_app_id(w);
return id && strcmp(id, w->icon_app_id) != 0;
}
/* Display title for one window: its own title, else its app_id, else a
generic placeholder. Writes into buf when the title must be synthesized
(so the returned pointer always outlives the call). */
static const char *overlay_window_title(struct kick_window *w,
char *buf, size_t sz) {
const char *t = window_title(w);
if (t && t[0])
return t;
const char *id = window_app_id(w);
if (id && id[0]) {
snprintf(buf, sz, "%s", id);
return buf;
}
return "window";
}
/* Whether every window of the tab is mid-close (so the row should vanish
from the overlay and the tab from cycling right away). */
static bool tab_closing(struct kick_tab *tab) {
if (!tab) return false;
struct kick_window *w;
wl_list_for_each(w, &tab->windows, link)
if ((window_live(w) || w->pending_claim) && !w->closing)
return false;
return true;
}
/* A row in the overlay (both the host-GL and the standalone wlr paths):
skip tabs whose windows are dead or all mid-close; black pending tabs are
rows too. */
static bool tab_overlay_row(struct kick_tab *tab) {
return tab_live(tab) && !tab_closing(tab);
}
/* ---------- Alt overlay rendering (single wlr render pass) ----------
Both modes composite the scene into an output buffer with wlroots and
paint the overlay onto that buffer as a second render pass -- nested
before blitting the frame to its host window, standalone before commit.
One renderer, one layout, one set of assets: the glyph atlas and icons
exist only as wlr textures. */
static struct wlr_render_color overlay_premul(float r, float g, float b, float a) {
return (struct wlr_render_color){ r * a, g * a, b * a, a };
}
static void overlay_pass_rect(struct wlr_render_pass *pass,
int x, int y, int w, int h,
float r, float g, float b, float a)
{
if (w <= 0 || h <= 0) return;
struct wlr_render_rect_options o = {
.box = { .x = x, .y = y, .width = w, .height = h },
.color = overlay_premul(r, g, b, a),
};
wlr_render_pass_add_rect(pass, &o);
}
static void overlay_pass_text(struct wlr_render_pass *pass, const char *s,
int x, int y, float alpha)
{
if (!overlay_font_ok || !server.overlay_atlas_wlr) return;
int pen = x;
for (const unsigned char *p = (const unsigned char *)s; *p; p++) {
int c = *p;
if (c < 32 || c > 126) {
pen += 4;
continue;
}
struct overlay_glyph *glyph = &host.overlay_glyphs[c - 32];
if (glyph->pw > 0 && glyph->ph > 0) {
struct wlr_render_texture_options o = {
.texture = server.overlay_atlas_wlr,
.src_box = { .x = glyph->ax, .y = glyph->ay,
.width = glyph->pw, .height = glyph->ph },
.dst_box = { .x = pen, .y = y + glyph->top,
.width = glyph->pw, .height = glyph->ph },
.alpha = &alpha,
.filter_mode = WLR_SCALE_FILTER_BILINEAR,
.blend_mode = WLR_RENDER_BLEND_MODE_PREMULTIPLIED,
};
wlr_render_pass_add_texture(pass, &o);
}
pen += glyph->adv;
}
}
static void overlay_pass_icon_tex(struct wlr_render_pass *pass,
struct wlr_texture *tex,
int ix, int iy, int size, float alpha)
{
if (!tex) return;
struct wlr_render_texture_options o = {
.texture = tex,
.dst_box = { .x = ix, .y = iy, .width = size, .height = size },
.alpha = &alpha,
.filter_mode = WLR_SCALE_FILTER_BILINEAR,
.blend_mode = WLR_RENDER_BLEND_MODE_PREMULTIPLIED,
};
wlr_render_pass_add_texture(pass, &o);
}
/* Confirm-before-quit modal, drawn in place of the Alt tab list while a quit
is pending: a centered panel with the live-window count and the y/n keys.
Same styling language as the overlay -- same backdrop, rim strokes, and
glyph atlas. */
static void draw_confirm_quit_pass(struct wlr_render_pass *pass) {
int n = live_window_count();
char l1[96], l2[96];
snprintf(l1, sizeof(l1), "Quit kick? %d window%s open.", n,
n == 1 ? "" : "s");
snprintf(l2, sizeof(l2), "[Y]es quit [N]o keep running");
int margin = 8, boxpad = 10;
int row_h = host.overlay_font_h > 0 ? host.overlay_font_h + 8 : 18;
int row_gap = 6;
int w1 = overlay_text_width(l1), w2 = overlay_text_width(l2);
int box_w = (w1 > w2 ? w1 : w2) + 2 * boxpad;
int box_h = 2 * row_h + row_gap + 2 * boxpad;
if (box_w > host.width - 2 * margin) box_w = host.width - 2 * margin;
if (box_h > host.height - 2 * margin) box_h = host.height - 2 * margin;
int box_x = (host.width - box_w) / 2;
int box_y = (host.height - box_h) / 2;
int bw = 1;
overlay_pass_rect(pass, box_x + bw, box_y + bw,
box_w - 2 * bw, box_h - 2 * bw,
0.07f, 0.07f, 0.09f, 1.0f);
overlay_pass_rect(pass, box_x, box_y, box_w, bw, 0.45f, 0.45f, 0.48f, 1.0f);
overlay_pass_rect(pass, box_x, box_y + box_h - bw, box_w, bw,
0.45f, 0.45f, 0.48f, 1.0f);
overlay_pass_rect(pass, box_x, box_y, bw, box_h, 0.45f, 0.45f, 0.48f, 1.0f);
overlay_pass_rect(pass, box_x + box_w - bw, box_y, bw, box_h,
0.45f, 0.45f, 0.48f, 1.0f);
int row_inner = box_w - 2 * boxpad;
for (int r = 0; r < 2; r++) {
const char *s = r == 0 ? l1 : l2;
int tw = overlay_text_width(s);
int x = box_x + boxpad + (row_inner - tw) / 2;
int y = box_y + boxpad + r * (row_h + row_gap);
overlay_pass_text(pass, s, x, y + (row_h - host.overlay_font_h) / 2,
0.95f);
}
}
static void draw_tab_overlay_pass(struct wlr_render_pass *pass) {
if (!host.overlay_visible && !confirm_quit_pending) return;
if (confirm_quit_pending) {
draw_confirm_quit_pass(pass);
return;
}
if (wl_list_empty(&server.tabs)) return;
int margin = 8, boxpad = 6;
int icon_sz = OVERLAY_ICON_SZ, icon_gap = 8, member_gap = 12;
int row_h = host.overlay_font_h > 0 ? host.overlay_font_h + 8 : 18;
int row_gap = 8;
if (row_h < icon_sz + 4) row_h = icon_sz + 4;
int max_row_w = 0, n_rows = 0;
struct kick_tab *tab;
wl_list_for_each(tab, &server.tabs, link) {
if (!tab_overlay_row(tab)) continue;
/* Keep the [title] log (focused window) current; per-window icons
are resolved lazily in the draw loop below. */
(void)tab_row_title(tab);
int n = 0, row_w = 0;
struct kick_window *w;
wl_list_for_each(w, &tab->windows, link) {
if (!w->mapped) continue;
char tb[64];
const char *t = overlay_window_title(w, tb, sizeof(tb));
row_w += icon_sz + icon_gap + overlay_text_width(t);
n++;
}
if (n > 0) {
if (n > 1) row_w += (n - 1) * member_gap;
} else {
struct kick_window *first = tab_first_window(tab);
const char *ct = (first && first->cmd && first->cmd[0])
? first->cmd : "pending";
row_w = icon_sz + icon_gap + overlay_text_width(ct);
}
if (row_w > max_row_w) max_row_w = row_w;
n_rows++;
}
if (n_rows == 0) return;
int avail_w = host.width - 2 * margin - 2 * boxpad;
if (max_row_w > avail_w) max_row_w = avail_w;
int box_w = max_row_w + 2 * boxpad;
int box_h = n_rows * row_h + (n_rows - 1) * row_gap + 2 * boxpad;
if (box_w > host.width - 2 * margin) box_w = host.width - 2 * margin;
if (box_h > host.height - 2 * margin) box_h = host.height - 2 * margin;
int box_x = (host.width - box_w) / 2;
int box_y = (host.height - box_h) / 2;
int bw = 1;
/* Opaque backdrop filling the box, framed by four rim strokes -- keeps
the titles readable over any content. (Alpha below 1.0 here gives a
see-through panel; render_standalone() forces whole-scene repaints
while the overlay shows, so a translucent value stays true instead of
stacking toward opaque on partial repaints.) */
overlay_pass_rect(pass, box_x + bw, box_y + bw, box_w - 2 * bw, box_h - 2 * bw,
0.07f, 0.07f, 0.09f, 1.0f);
overlay_pass_rect(pass, box_x, box_y, box_w, bw, 0.45f, 0.45f, 0.48f, 1.0f);
overlay_pass_rect(pass, box_x, box_y + box_h - bw, box_w, bw,
0.45f, 0.45f, 0.48f, 1.0f);
overlay_pass_rect(pass, box_x, box_y, bw, box_h, 0.45f, 0.45f, 0.48f, 1.0f);
overlay_pass_rect(pass, box_x + box_w - bw, box_y, bw, box_h,
0.45f, 0.45f, 0.48f, 1.0f);
int row = 0;
wl_list_for_each(tab, &server.tabs, link) {
if (!tab_overlay_row(tab)) continue;
(void)tab_row_title(tab);
int ry = box_y + boxpad + row * (row_h + row_gap);
bool active = tab == server.active_tab;
int row_inner = box_w - 2 * boxpad;
struct kick_window *wins[32];
char fitt[32][256];
int widths[32];
int n = 0;
struct kick_window *w;
wl_list_for_each(w, &tab->windows, link) {
if (!w->mapped) continue;
if (n >= 32) break;
if (overlay_window_icon_needs_load(w))
overlay_icon_load_window(w);
wins[n++] = w;
}
int share = 0;
if (n > 0) {
int avail = row_inner - n * (icon_sz + icon_gap);
if (n > 1) avail -= (n - 1) * member_gap;
share = avail / n;
if (share < 0) share = 0;
}
int total_w = 0;
for (int k = 0; k < n; k++) {
char tb[64];
const char *dt = overlay_window_title(wins[k], tb, sizeof(tb));
fit_text(dt, share, fitt[k], sizeof(fitt[k]));
widths[k] = overlay_text_width(fitt[k]);
total_w += icon_sz + icon_gap + widths[k];
}
if (n > 1) total_w += (n - 1) * member_gap;
int pen = box_x + boxpad + (row_inner - total_w) / 2;
int iy = ry + (row_h - icon_sz) / 2;
if (n == 0) {
struct kick_window *first = tab_first_window(tab);
const char *ct = (first && first->cmd && first->cmd[0])
? first->cmd : "pending";
char ctb[64];
int cavail = row_inner - (icon_sz + icon_gap) - 4;
if (cavail < 0) cavail = 0;
fit_text(ct, cavail, ctb, sizeof(ctb));
int ctw = overlay_text_width(ctb);
int cmw = icon_sz + icon_gap + ctw;
int cpen = box_x + boxpad + (row_inner - cmw) / 2;
overlay_pass_rect(pass, cpen - 2, ry - 1, cmw + 4, row_h,
0.22f, 0.22f, 0.25f, 1.0f);
overlay_pass_text(pass, ctb, cpen + icon_sz + icon_gap,
ry + (row_h - host.overlay_font_h) / 2, 0.9f);
}
for (int k = 0; k < n; k++) {
struct kick_window *w = wins[k];
int tw = widths[k];
int mw = icon_sz + icon_gap + tw;
bool is_cursor = active && w->focused;
overlay_pass_rect(pass, pen - 2, ry - 1, mw + 4, row_h,
0.22f, 0.22f, 0.25f, 1.0f);
if (is_cursor)
overlay_pass_rect(pass, pen - 2, ry - 1, mw + 4, row_h,
0.24f, 0.36f, 0.60f, 0.9f);
int mx = pen, my = iy;
if (w->icon_wlr) {
overlay_pass_icon_tex(pass, w->icon_wlr, mx, my, icon_sz,
active ? 1.0f : 0.72f);
} else {
overlay_pass_rect(pass, mx, my, icon_sz, icon_sz,
0.45f, 0.45f, 0.48f, 0.85f);
overlay_pass_rect(pass, mx + 3, my + 3, icon_sz - 6,
icon_sz - 6, 0.07f, 0.07f, 0.09f, 1.0f);
}
overlay_pass_text(pass, fitt[k], mx + icon_sz + icon_gap,
ry + (row_h - host.overlay_font_h) / 2,
active ? 1.0f : 0.72f * 0.9f);
pen += mw + member_gap;
}
row++;
}
}
/* ---------- Standalone overlay rendering (wlr render pass) ----------
The standalone output paints via the wlroots GLES2 renderer, so the overlay
is drawn as a second pass on the same buffer directly with wlr textures.
Mirrors the layout computed by draw_tab_overlay() for the host-GL path. */
/* ===================== Server-side wlroots setup ===================== */
static void swapchain_resize(int width, int height) {
if (width < 50) width = 50;
if (height < 50) height = 50;
if (server.swapchain && server.swapchain->width == width
&& server.swapchain->height == height)
return;
static uint64_t mods[] = { DRM_FORMAT_MOD_LINEAR };
struct wlr_drm_format fmt = {
.format = DRM_FORMAT_ARGB8888,
.len = 1,
.capacity = 1,
.modifiers = mods,
};
if (server.swapchain) {
wlr_swapchain_destroy(server.swapchain);
server.swapchain = NULL;
}
server.swapchain = wlr_swapchain_create(server.allocator, width, height, &fmt);
if (!server.swapchain)
fprintf(stderr, "kick: swapchain create failed at %dx%d\n",
width, height);
}
static void output_resize(int width, int height) {
if (width < 50) width = 50;
if (height < 50) height = 50;
if (!server.output || !server.allocator) return;
/* The new size is applied to the output lazily at render time (see
apply_pending_output_resize); here only the scene geometry and the
clients are told, so configure-time stays free of modesets and
swapchain reallocation. */
if (server.bg_rect)
wlr_scene_rect_set_size(server.bg_rect, width, height);
/* Size every mapped client into the area left after any bar's exclusive
zone (the layout pass applies the new full area before the output's
geometry is committed here, so tabs and the panel both track the
resize). While fullscreen the fullscreen configure already sizes
clients to the output, so the maximize/size requests are skipped to
avoid state churn (resize_tabs_to_usable honours clients_fullscreen). */
struct wlr_box full = { 0, 0, width, height };
layer_apply_layout_box(&full);
kick_request_redraw();
}
/* A host configure may resize the canvas; apply that size to the output
lazily, at render time, instead of modesetting and reallocating the
swapchain on every configure. Folding the custom mode into the pending
state makes wlr_scene build the frame at the new resolution and commit
mode+buffer in one atomic operation, so a drag costs one GBM alloc and one
commit per resized frame (no empty-buffer modeset churn in between).
Standalone outputs never change size here, so this is a no-op for them. */
static void apply_pending_output_resize(struct wlr_output_state *state) {
if (!server.output) return;
int w = host.width, h = host.height;
if (server.output->width == w && server.output->height == h) return;
swapchain_resize(w, h);
wlr_output_state_set_custom_mode(state, w, h, 0);
}
static void handle_output_frame(struct wl_listener *listener, void *data) {
(void)listener; (void)data;
frame_pending = true;
}
/* How many standalone outputs have been seen since the last (re)connect.
DRM destroys and re-creates the output when the session loses/regains its
VT, so this is reset to keep accepting the re-added connector. */
static int standalone_output_count;
/* DRM destroys the output when the session (VT) is lost. Clear our
references so nothing touches freed memory, detach the frame listener
(wlr_output_finish asserts it's empty), and let the connector re-added on
resume be accepted again. */
static void handle_output_destroy(struct wl_listener *listener, void *data) {
(void)listener;
(void)data;
wl_list_remove(&server.output_destroy.link);
wl_list_remove(&server.frame.link);
server.output = NULL;
server.scene_output = NULL; /* wlroots frees it via its output addon */
if (server.swapchain) {
wlr_swapchain_destroy(server.swapchain);
server.swapchain = NULL;
}
standalone_output_count = 0;
frame_pending = false;
needs_redraw = false;
}
static void handle_new_output(struct wl_listener *listener, void *data) {
(void)listener;
struct wlr_output *output = data;
/* Standalone (multi-monitor allowed at the wlroots layer): drive only
the first output with the kick canvas, like the headless nested
single output. Later outputs are left disabled. */
if (server.standalone && standalone_output_count++ > 0) {
kick_log(KICK_LOG_INFO,
"standalone: extra output ignored (first output only)\n");
return;
}
if (!wlr_output_init_render(output, server.allocator, server.renderer)) {
fprintf(stderr, "kick: output init_render failed\n");
return;
}
wlr_output_create_global(output, server.wl_display);
server.output = output;
server.scene_output = wlr_scene_output_create(server.scene, output);
wlr_scene_output_set_position(server.scene_output, 0, 0);
/* Always render the pointer into our own frame buffer (software cursor)
instead of a hardware cursor plane: the headless backend's set_cursor
hook makes wlroots believe it has a plane (so the scene software pass
is skipped) while actually drawing nothing, and a hardware plane would
float the cursor outside the buffer we composite/dump. */
/* Force software cursors only on headless outputs: their set_cursor
hook pretends a hardware plane exists while drawing nothing (so the
scene software pass gets skipped and dumps lose the pointer), and a
hardware plane would float outside the buffer we composite/dump.
Real DRM outputs have working hardware planes -- and locking them to
software cursoring would make direct scanout permanently ineligible
(the cursor must be composited), killing the zero-copy fullscreen
path this mode exists for. */
if (server.standalone && wlr_output_is_headless(output))
wlr_output_lock_software_cursors(output, true);
/* A recreated output must inherit the overlay's scanout suppression:
the lock counter died with the old output, and if the overlay is
currently held up its second-pass rendering needs the composite path. */
if (host.overlay_visible)
wlr_output_lock_attach_render(output, true);
/* Give the standalone cursor a place to live. Idempotent across VT
round-trips (wlr_output_layout_add reuses the existing entry), and the
cursor attaches its output cursor via the layout's add signal. The
nested (host-window) output is added too, so xdg-output's
get_xdg_output finds the output in the layout instead of asserting. */
if (server.output_layout)
wlr_output_layout_add(server.output_layout, output, 0, 0);
/* Render whenever the output is ready for a frame (refresh-rate driven),
like tinywl; this is what drives client frame callbacks / surface
enter events even before any damage has accumulated. */
server.frame.notify = handle_output_frame;
wl_signal_add(&output->events.frame, &server.frame);
server.output_destroy.notify = handle_output_destroy;
wl_signal_add(&output->events.destroy, &server.output_destroy);
/* Enable the output up front so buffer commits succeed even before the
host window has been configured. A native output drives at its
preferred mode; everything else keeps the fixed headless size. */
int w = output->width > 0 ? output->width : host.width;
int h = output->height > 0 ? output->height : host.height;
struct wlr_output_state state;
wlr_output_state_init(&state);
wlr_output_state_set_enabled(&state, true);
struct wlr_output_mode *mode = NULL;
if (server.standalone && !server.standalone_headless) {
if (mode_req_w > 0) {
/* --screen-mode WxH[@Hz]: pick an exact-resolution mode, highest
refresh when none was requested. A request the output can't
satisfy is a startup error: print every reported mode and exit
(before any client launches or the socket is advertised). */
struct wlr_output_mode *m;
int best_refresh = 0;
wl_list_for_each(m, &output->modes, link) {
if (m->width != mode_req_w || m->height != mode_req_h)
continue;
if (mode_req_refresh > 0) {
if (m->refresh == mode_req_refresh) {
mode = m;
break;
}
continue;
}
if (m->refresh > best_refresh) {
best_refresh = m->refresh;
mode = m;
}
}
if (!mode) {
fprintf(stderr, "kick: no %dx%d",
mode_req_w, mode_req_h);
if (mode_req_refresh > 0)
fprintf(stderr, "@%u.%03u", mode_req_refresh / 1000,
mode_req_refresh % 1000);
if (wl_list_empty(&output->modes))
fprintf(stderr, " mode; output reports no modes\n");
else
fprintf(stderr, " mode; available:\n");
wl_list_for_each(m, &output->modes, link) {
fprintf(stderr, " %dx%d@%u.%03u%s%s\n",
m->width, m->height, m->refresh / 1000,
m->refresh % 1000,
m->preferred ? " (preferred)" : "",
(m->width == mode_req_w && m->height == mode_req_h)
? " (requested size)" : "");
}
exit(1);
}
} else {
mode = wlr_output_preferred_mode(output);
}
}
if (mode) {
w = mode->width;
h = mode->height;
wlr_output_state_set_mode(&state, mode);
} else {
wlr_output_state_set_custom_mode(&state, w, h, 0);
}
wlr_output_commit_state(output, &state);
wlr_output_state_finish(&state);
/* Overlay geometry and the swapchain are sized to the visible canvas;
in standalone there is no host window, so use the output size itself. */
if (server.standalone) {
host.width = w;
host.height = h;
}
swapchain_resize(w, h);
/* An opaque full-output background node gives the scene a deterministic
backdrop so the nested frame is never transparent. (Direct scanout is
disabled separately above; a rect alone cannot prevent it because
wlroots culls a rect that a covering client surface occludes, leaving
a single render-list entry which is exactly what triggers scanout.)
On a re-connected output (VT round-trip) the node already exists; just
resize it. */
if (server.bg_rect) {
wlr_scene_rect_set_size(server.bg_rect, w, h);
} else {
server.bg_rect = wlr_scene_rect_create(&server.scene->tree, w, h,
(float[]){ 0.0f, 0.0f, 0.0f, 1.0f });
if (server.bg_rect)
wlr_scene_node_lower_to_bottom(&server.bg_rect->node);
}
/* Standalone-only damage sentinel for the overlay; see
standalone_overlay_damage(). A fully transparent rect, sized to the
output and left enabled (it renders nothing). It sits at the bottom of
the z-order and is transiently raised inside standalone_overlay_damage()
to re-populate its visible region and force whole-output damage. */
if (server.overlay_damage_rect) {
wlr_scene_rect_set_size(server.overlay_damage_rect, w, h);
} else if (server.standalone) {
server.overlay_damage_rect = wlr_scene_rect_create(
&server.scene->tree, w, h, (float[]){ 0.0f, 0.0f, 0.0f, 0.0f });
}
}
/* Nearest live tab, scanning right first (prefer_right) or left first.
The scan stops at the list ends -- it never wraps -- so the reflow after
a tab is removed matches the old first/last-tab behavior. NULL when
`tab` is the only live slot. */
static struct kick_tab *pick_successor(struct kick_tab *tab,
bool prefer_right) {
if (!tab) return NULL;
struct kick_tab *t;
if (prefer_right) {
/* Tabs after `tab` first (immediate right neighbor first), then the
ones before it (immediate left neighbor first -- no wrap to the far
end). */
bool past = false;
wl_list_for_each(t, &server.tabs, link) {
if (t == tab) { past = true; continue; }
if (!past) continue;
if (tab_live(t) && !tab_closing(t)) return t;
}
past = false;
wl_list_for_each_reverse(t, &server.tabs, link) {
if (t == tab) { past = true; continue; }
if (!past) continue;
if (tab_live(t) && !tab_closing(t)) return t;
}
} else {
/* Tabs before `tab` first (immediate left neighbor first), then the
ones after it (immediate right neighbor first -- no wrap). */
bool past = false;
wl_list_for_each_reverse(t, &server.tabs, link) {
if (t == tab) { past = true; continue; }
if (!past) continue;
if (tab_live(t) && !tab_closing(t)) return t;
}
past = false;
wl_list_for_each(t, &server.tabs, link) {
if (t == tab) { past = true; continue; }
if (!past) continue;
if (tab_live(t) && !tab_closing(t)) return t;
}
}
return NULL;
}
/* Detach all xdg-shell signal listeners from a window without invoking any
destroy handler or refocus logic. Used by both the normal destroy path
and the forceful remove_tab() cleanup. */
static void window_detach_xdg_listeners(struct kick_window *w) {
wl_list_remove(&w->destroy.link);
wl_list_remove(&w->map.link);
wl_list_remove(&w->unmap.link);
wl_list_remove(&w->commit.link);
wl_list_remove(&w->set_title.link);
wl_list_remove(&w->set_app_id.link);
wl_list_remove(&w->request_maximize.link);
wl_list_remove(&w->request_fullscreen.link);
wl_list_remove(&w->request_minimize.link);
wl_list_remove(&w->request_move.link);
wl_list_remove(&w->request_resize.link);
if (w->dialog_wired) {
wl_list_remove(&w->dialog_set_modal.link);
wl_list_remove(&w->dialog_destroy.link);
w->dialog_wired = false;
}
}
#if HAVE_XWAYLAND
/* Same for an XWayland window: the claim-time listener set (destroy,
associate/dissociate, ICCCM requests, set_title/set_class) plus the
association-wired surface map/unmap/commit. */
static void window_detach_x11_listeners(struct kick_window *w) {
wl_list_remove(&w->destroy.link);
wl_list_remove(&w->xs_associate.link);
wl_list_remove(&w->xs_dissociate.link);
wl_list_remove(&w->request_maximize.link);
wl_list_remove(&w->request_fullscreen.link);
wl_list_remove(&w->request_minimize.link);
wl_list_remove(&w->xs_request_configure.link);
wl_list_remove(&w->xs_request_activate.link);
wl_list_remove(&w->xs_request_close.link);
wl_list_remove(&w->xs_set_title.link);
wl_list_remove(&w->xs_set_class.link);
if (w->xs_surface_linked) {
wl_list_remove(&w->map.link);
wl_list_remove(&w->unmap.link);
wl_list_remove(&w->commit.link);
w->xs_surface_linked = false;
}
}
#endif
/* ============= Focus and show (unified tab/window model) ============= */
/* The tab's position in server.tabs, leftmost first (0-based). Used for
logs and diagnostics only; ordering decisions never index the list. */
static int tab_index(struct kick_tab *tab) {
int i = 0;
struct kick_tab *t;
wl_list_for_each(t, &server.tabs, link) {
if (t == tab) return i;
i++;
}
return -1;
}
/* The window a tab's keyboard sits on: the focused window while it is still
mapped, else the newest mapped window, else the first window in the list
(a still-black pending placeholder, if any). NULL only for an empty tab. */
static struct kick_window *tab_current_window(struct kick_tab *tab) {
if (!tab) return NULL;
struct kick_window *w;
wl_list_for_each(w, &tab->windows, link)
if (w->focused && w->mapped)
return w;
struct kick_window *newest = NULL;
wl_list_for_each(w, &tab->windows, link)
if (w->mapped || window_live(w))
newest = w;
if (newest) return newest;
return tab_first_window(tab);
}
/* Make `w` (or none, when NULL) the only drawn window: disable every window's
scene tree across all tabs, then enable exactly `w`'s tree. Overlay
windows and popups are parented elsewhere and untouched. */
static void show_window(struct kick_window *w) {
struct kick_tab *t;
wl_list_for_each(t, &server.tabs, link) {
struct kick_window *it;
wl_list_for_each(it, &t->windows, link)
if (it->tree)
wlr_scene_node_set_enabled(&it->tree->node, it == w);
}
}
/* Give a window of the active tab the keyboard, demoting whatever held it
before (an earlier window of the same tab). The entered window becomes
the only drawn one. A window with no surface yet (a still-black pending
window) still becomes the tab's focused/current window; when it later
maps, window_enter runs again (its own tree is still disabled) to show
and activate it. */
static void window_enter(struct kick_window *w) {
/* While the session is locked nothing may take keyboard focus from the
lock surface (which is focused directly, outside the tab model); the
lock restore path clears session_locked before refocusing. */
if (!w || server.session_locked) return;
struct kick_tab *tab = w->tab;
/* A genuine no-op: already focused AND already drawn. The black ->
mapped promotion below is the one same-window case with something
still to do (focused but not yet shown). */
if (w->focused && w->tree && w->tree->node.enabled) return;
struct kick_window *it;
wl_list_for_each(it, &tab->windows, link)
if (it != w && it->focused) {
window_set_activated(it, false);
it->focused = false;
}
w->focused = true;
struct wlr_surface *surface = window_surface(w);
if (surface) {
window_set_activated(w, true);
struct wlr_keyboard *kbd = wlr_seat_get_keyboard(server.seat);
if (!kbd) kbd = &server.keyboard;
wlr_seat_keyboard_notify_enter(server.seat, surface,
kbd->keycodes, kbd->num_keycodes, &kbd->modifiers);
}
show_window(w->tree ? w : NULL);
kick_request_redraw();
}
/* Make `tab` the active tab: hide the old tab's windows, then put the
keyboard on the new tab's current window (returning to a tab lands back on
the window that was focused when we left it). A black tab activates its
still-black pending window with no surface to enter; the keyboard focus is
dropped instead. Called with the same tab as already active only to
promote it black -> mapped (the one case with something still to do), so
callers that want a true no-op must guard first. */
static void set_active_tab(struct kick_tab *tab) {
if (!tab || server.session_locked) return;
struct kick_tab *old = server.active_tab;
if (old && old != tab) {
struct kick_window *w;
wl_list_for_each(w, &old->windows, link) {
if (w->focused)
window_set_activated(w, false);
if (w->tree)
wlr_scene_node_set_enabled(&w->tree->node, false);
}
}
server.active_tab = tab;
struct kick_window *enter = tab_current_window(tab);
if (enter) {
if (kick_log_level() >= KICK_LOG_DEBUG) {
struct wlr_surface *s = window_surface(enter);
kick_log(KICK_LOG_DEBUG, "[diag] active app=%d surface=%dx%d "
"node on\n", tab_index(tab),
s ? s->current.width : 0, s ? s->current.height : 0);
}
window_enter(enter);
/* Landed on a stacked --tab-groups member (the tab's own window is
the member of a shown parent tab): handing the tab the keyboard
focuses the member, announced like the map path does. */
if (enter->origin == ORIGIN_GROUP && enter->tab == enter->parent_tab)
kick_log(KICK_LOG_INFO, "[sub] focus app=%d\n", tab_index(tab));
} else {
if (kick_log_level() >= KICK_LOG_DEBUG)
kick_log(KICK_LOG_DEBUG, "[diag] active slot=%d (black, awaiting "
"map)\n", tab_index(tab));
wlr_seat_keyboard_notify_clear_focus(server.seat);
show_window(NULL);
}
/* The newly-active tab owns the cursor shape: apply its last requested
shape (or default when it never asked), so a switched-from tab's shape
never bleeds onto the next tab. */
apply_cursor_shape(enter && enter->cursor_shape > 0
? enter->cursor_shape
: WP_CURSOR_SHAPE_DEVICE_V1_SHAPE_DEFAULT);
kick_request_redraw();
}
/* After the focused window of the active tab unmaps or dies, hand the
keyboard back to the tab's current window. No-op unless the tab is the
active one. */
static void refocus_tab(struct kick_tab *tab) {
if (!tab || tab != server.active_tab) return;
struct kick_window *top = tab_current_window(tab);
if (top) {
kick_log(KICK_LOG_INFO, "[sub] refocus app=%d\n", tab_index(tab));
window_enter(top);
} else {
show_window(NULL);
kick_request_redraw();
}
}
/* Drop `tab` outright: cancel its close timers, sever any other tab's
parent_tab reference to it, free every remaining window (detaching
listeners so wlroots' destroy-time asserts and a re-claim into a reused
window never see stale links), and unlink the tab from server.tabs. The
caller must already have handed the active crown elsewhere; remove_tab
only defends active_tab against a tab that was somehow still on it. */
static void remove_tab(struct kick_tab *tab) {
if (!tab) return;
if (server.active_tab == tab)
server.active_tab = NULL;
/* An override-redirect menu may have stashed this tab as its focus
owner (or_handle_map); the menu outlives the tab when the tab is
closed first. Clear it so the later focus release drops keyboard
focus instead of activating freed memory. */
if (server.or_focus_owner == tab)
server.or_focus_owner = NULL;
struct kick_tab *t;
wl_list_for_each(t, &server.tabs, link) {
if (t == tab) continue;
struct kick_window *w;
wl_list_for_each(w, &t->windows, link)
if (w->parent_tab == tab)
w->parent_tab = NULL;
}
struct kick_window *w, *wt;
wl_list_for_each_safe(w, wt, &tab->windows, link) {
if (w->close_timer) {
wl_event_source_remove(w->close_timer);
w->close_timer = NULL;
}
if (w->icon_wlr)
wlr_texture_destroy(w->icon_wlr);
if (w->toplevel)
window_detach_xdg_listeners(w);
#if HAVE_XWAYLAND
if (w->is_x11)
window_detach_x11_listeners(w);
#endif
free(w->cmd);
free(w);
}
wl_list_remove(&tab->link);
free(tab);
}
/* Remove a tab for good: if it is the active tab, hand the crown to a
neighbor (preferring left, so the tab that was second becomes the new
leftmost); when the last tab goes, the session tears down here, since
nothing else will. Then the tab itself is removed: closed tabs leave no
hole. */
static void drop_tab(struct kick_tab *tab) {
if (server.active_tab == tab) {
server.active_tab = NULL;
struct kick_tab *succ = pick_successor(tab, 0);
if (succ) {
set_active_tab(succ);
} else {
/* last tab closed: close the host window (nested only) and exit */
host_teardown_window();
shutdown_cleanup();
exit(0);
}
}
remove_tab(tab);
}
/* Shared tail of a window's destroy handling (xdg and X11 alike): the
per-kind handlers have already detached their own listeners; here we drop
the window from its tab, free it, hand the keyboard to the tab's remaining
current window if this one held it, and remove the tab when it empties
(which moves the active crown via drop_tab). */
static void window_destroy_common(struct kick_window *w) {
struct kick_tab *tab = w->tab;
wl_list_remove(&w->link);
kick_log(KICK_LOG_INFO, "[sub] unstack app=%d\n", tab_index(tab));
if (w->close_timer) {
wl_event_source_remove(w->close_timer);
w->close_timer = NULL;
}
bool had_focus = w->focused;
/* Tear down the taskbar handles so taskbars drop the entry now. */
foreign_handle_destroy(w);
if (w->icon_wlr)
wlr_texture_destroy(w->icon_wlr);
free(w);
if (wl_list_empty(&tab->windows)) {
drop_tab(tab);
return;
}
if (had_focus)
refocus_tab(tab);
}
/* A window's xdg toplevel surface died. The scene node dies with the xdg
surface; drop the pointers, detach every listener we attached (wlroots
asserts the event lists are empty afterwards), and run the shared teardown
tail. This is the unified handler for what used to be the "main surface"
and the stacked tab-group members alike. */
static void handle_toplevel_destroy(struct wl_listener *listener, void *data) {
(void)data;
struct kick_window *w = wl_container_of(listener, w, destroy);
w->toplevel = NULL;
w->tree = NULL;
/* The overlay's row for this tab disappears the moment the toplevel does,
shrinking the box mid-menu. The overlay is drawn into the scene-output
buffer outside the scene graph, so its damage trackers never learn about
the old pixels; without whole-output damage the vacated ring of the
larger box stays baked into the reused swapchain buffer. */
if (host.overlay_visible && server.standalone)
standalone_overlay_damage();
window_detach_xdg_listeners(w);
window_destroy_common(w);
}
/* Grace period after the Alt+Delete SIGTERM before SIGKILL escalation. */
#define KICK_CLOSE_ESCALATE_MS 150
/* Escalate an Alt+Delete close to SIGKILL if the client ignored the SIGTERM
and its toplevel is still up. Live windows are removed at toplevel
destroy (which also cancels this timer), so for a mapped window the callback
never fires against a reaped or reused pid. For a window with no live
surface (a still-black pending window) there is no toplevel whose destroy
would reap it, so its removal happens here, right after the SIGKILL. */
static int close_window_escalate(void *data) {
struct kick_window *w = data;
if (w->closing && window_killable(w))
kill_window(w, SIGKILL);
if (w->close_timer) {
wl_event_source_remove(w->close_timer);
w->close_timer = NULL;
}
if (w->closing && !window_live(w))
window_destroy_common(w);
return 0;
}
/* Window close (Alt+Delete on the active window, or an X11 window's close
request). A window that still has siblings closes on its own: the tab
stays up and the destroy path refocuses the tab. The last window of a tab
closes the whole tab: the active crown moves to the right neighbor (or the
left neighbor if the closed tab was the rightmost) in this same call. The
client's whole process group gets SIGTERM, then SIGKILL after a short
grace if it ignores the TERM (see close_window_escalate); X11 windows also
get WM_DELETE_WINDOW first. A closing black window (still pending) drops
out of the overlay and cycle right away and is removed by the escalation; a
closing last tab tears the session down here, since nothing else will. */
static void close_window(struct kick_window *w) {
if (!w || !window_killable(w)) return;
pid_t g = window_signal_group(w);
pid_t shown = (g > 0 && g != getpgid(0)) ? g : w->client_pid;
struct kick_tab *tab = w->tab;
w->closing = true;
int died = tab_index(tab);
/* A black window never fires a toplevel destroy, so drop it from the
overlay/cycle immediately; only the escalation timer and the
success-removal paths touch it afterwards. */
if (!window_live(w))
w->pending_claim = false;
/* Whether this window is the tab's only one: closing it is closing the
whole tab, which moves the crown right now. A window with siblings
closes on its own; the tab and the crown stay put. */
bool sole = wl_list_length(&tab->windows) == 1;
if (sole) {
struct kick_tab *succ = pick_successor(tab, true);
if (succ) {
set_active_tab(succ);
} else {
/* Last live tab: tear the session down now. */
kick_log(KICK_LOG_INFO, "kick: closing tab %d (pid %d)\n",
died, (int)shown);
host_teardown_window();
shutdown_cleanup();
exit(0);
}
}
/* A stacked --tab-groups member shares its client (and process group)
with its parent tab's own window: closing it must only ask the
client to close that one surface -- never signal the shared process
group, or the tab's owner dies with it. The member's destroy path
(window_destroy_common) unstacks it and refocuses the tab. */
if (w->origin == ORIGIN_GROUP && w->tab == w->parent_tab) {
window_graceful_close(w);
return;
}
/* X11 windows get WM_DELETE_WINDOW first; the SIGTERM below (and the
SIGKILL escalation) remains the universal fallback for both kinds. */
window_graceful_close(w);
kill_window(w, SIGTERM);
kick_log(KICK_LOG_INFO, "kick: closing tab %d (pid %d)\n",
died, (int)shown);
w->close_timer = wl_event_loop_add_timer(server.loop, close_window_escalate,
w);
if (w->close_timer)
wl_event_source_timer_update(w->close_timer, KICK_CLOSE_ESCALATE_MS);
}
/* Alt+Delete on the active tab closes the active WINDOW, not the whole tab:
the focused window is asked to close on its own and the tab stays up; only
when the tab holds a single window does Delete take the whole tab down.
The window's own destroy path (window_destroy_common) refocuses the tab,
just as if the client had closed it directly. */
static void close_active_window(void) {
struct kick_tab *tab = server.active_tab;
if (!tab) return;
struct kick_window *w = tab_current_window(tab);
if (!w) return;
close_window(w);
}
static void handle_request_maximize(struct wl_listener *listener, void *data) {
(void)data;
struct kick_window *w = wl_container_of(listener, w, request_maximize);
struct wlr_xdg_toplevel *toplevel = w->toplevel;
if (toplevel->base->initialized)
wlr_xdg_toplevel_set_maximized(toplevel, true);
}
/* Queue a host-window fullscreen change until the present pipeline has
drained. labwc applies an acked configure at the next wl_surface commit;
while tabs animate, an eglSwapBuffers that started before the resize can
complete after our ack and marshal a stale-size frame post-ack -- the new
layout is then anchored to the old geometry ("fullscreen rooted where the
window was", margins top/left, cropped bottom/right). Waiting for the
frame callback proves the last swap reached the screen, so nothing stale
can follow the ack. Rapid requests collapse to the latest target. */
/* Apply a fullscreen change to the kick window on the active backend:
direct path talks xdg-shell immediately (its ack precedes every commit
deterministically, so labwc's deadline race cannot anchor stale state);
libdecor path queues until the present pipeline drains, for the same
reason. */
static void host_apply_fullscreen(bool fs) {
if (!host.use_libdecor) {
if (!host.toplevel) return; /* standalone has no host window */
if (fs)
xdg_toplevel_set_fullscreen(host.toplevel, NULL);
else
xdg_toplevel_unset_fullscreen(host.toplevel);
return;
}
if (!host.frame) return; /* standalone has no host window */
if (host.present_pending) {
host.fs_queued = true;
host.fs_target = fs;
return;
}
if (fs)
libdecor_frame_set_fullscreen(host.frame, NULL);
else
libdecor_frame_unset_fullscreen(host.frame);
}
static void handle_request_fullscreen(struct wl_listener *listener, void *data) {
(void)data;
struct kick_window *w = wl_container_of(listener, w, request_fullscreen);
struct wlr_xdg_toplevel *toplevel = w->toplevel;
if (!toplevel->base->initialized) return;
/* wlroots 0.19 emits request_fullscreen with NULL data; the direction
lives in toplevel->requested.fullscreen. Honor the client's request
and mirror it onto the host window: one action fullscreens the whole
monitor. */
bool fs = toplevel->requested.fullscreen;
wlr_xdg_toplevel_set_fullscreen(toplevel, fs);
kick_log(KICK_LOG_INFO, "client fullscreen=%d\n", fs);
host_apply_fullscreen(fs);
}
/* Propagate the host window's fullscreen state onto every client window.
Called from host_xdg_toplevel_configure when that state actually changes.
X11 windows keep their own geometry (only into a tab by an explicit
--tab-groups group attachment), so on the way out only xdg windows and
tab-owned x11 windows get the re-maximize/resize; windows arriving later
pick the flag up at their first commit. */
static void clients_set_fullscreen(bool fs) {
server.clients_fullscreen = fs;
kick_log(KICK_LOG_INFO, "clients fullscreen=%d\n", fs);
kick_log(KICK_LOG_INFO, "members fullscreen=%d\n", fs);
struct kick_tab *t;
wl_list_for_each(t, &server.tabs, link) {
struct kick_window *w;
wl_list_for_each(w, &t->windows, link) {
if (!window_initialized(w)) continue;
window_set_fullscreen(w, fs);
if (!fs && (w->toplevel || w->origin != ORIGIN_GROUP ||
w->tab != w->parent_tab)) {
window_set_maximized(w, true);
window_set_size(w, server.output->width, server.output->height);
}
}
}
}
/* Toggle the host window's fullscreen state. The request is queued until
the present pipeline drains (see host_apply_fullscreen); the actual flip
happens asynchronously in host_toplevel_configure, where the resulting
configure updates host.fullscreen and propagates to every client. */
static void host_toggle_fullscreen(void) {
host_apply_fullscreen(!host.fullscreen);
}
static void handle_request_minimize(struct wl_listener *listener, void *data) {
(void)listener; (void)data;
}
static void handle_request_move(struct wl_listener *listener, void *data) {
(void)listener; (void)data;
}
static void handle_request_resize(struct wl_listener *listener, void *data) {
(void)listener; (void)data;
}
/* Place a scene tree so the client's content sits at 0,0. Shared by tabs
and stacked tab-group members. */
static void position_tree(struct wlr_xdg_toplevel *toplevel,
struct wlr_scene_tree *tree) {
if (!tree) return;
/* CSD clients (foot/kitty) reserve a titlebar gutter above their
content, which we don't paint, so it shows as a dark bar and their
content sits too low (bottom row/cursor cropped). Shift them up by
that gutter so the dark bar is cropped instead of the terminal's
bottom. Clients with no gutter (geometry.y >= 0, e.g. wltest) are
left untouched. */
struct wlr_box geom = toplevel->base->geometry;
int y = -geom.y;
if (geom.y < 0)
y = 0;
/* Offset the tab content down (right) past any bar's reserved edge, so a
top bar does not cover the window's titlebar area. With no bar the
layout origin is (0,0) and the tab stays full-screen as before. */
wlr_scene_node_set_position(&tree->node, -geom.x + server.layout_x,
y + server.layout_y);
}
static void position_window(struct kick_window *w) {
if (!w || !w->tree || !w->toplevel) return;
position_tree(w->toplevel, w->tree);
}
static void handle_toplevel_commit(struct wl_listener *listener, void *data) {
(void)data;
struct kick_window *w = wl_container_of(listener, w, commit);
struct wlr_xdg_toplevel *toplevel = w->toplevel;
if (toplevel->base->initial_commit) {
wlr_xdg_toplevel_set_maximized(toplevel, true);
wlr_xdg_toplevel_set_size(toplevel, server.output->width,
server.output->height);
if (server.clients_fullscreen)
wlr_xdg_toplevel_set_fullscreen(toplevel, true);
}
/* Geometry can settle after the first frames (kitty/foot report a
negative y once they decide on their titlebar), so keep the scene
position in sync with every commit instead of only at activation. */
position_window(w);
/* [diag] What does this client commit, and is its scene node visible? */
struct wlr_surface *s = toplevel->base->surface;
struct wlr_buffer *cbuf = s ? s->current.buffer : NULL;
struct wlr_dmabuf_attributes dma;
static struct wlr_buffer *last_logged = NULL;
if (cbuf && cbuf != last_logged) {
last_logged = cbuf;
bool is_dma = wlr_buffer_get_dmabuf(cbuf, &dma);
bool node_on = tab_visible(w->tab);
if (kick_log_level() >= KICK_LOG_DEBUG) {
kick_log(KICK_LOG_DEBUG, "[diag] commit app=%d geom=%dx%d+%d+%d "
"buf=%dx%d dma=%d%s node_enabled=%d active=%d\n",
tab_index(w->tab),
toplevel->base->geometry.width,
toplevel->base->geometry.height,
toplevel->base->geometry.x,
toplevel->base->geometry.y,
s->current.buffer_width,
s->current.buffer_height,
is_dma,
is_dma ? (dma.n_planes ? "" : " planes=0") : "",
node_on,
w->focused);
if (is_dma) {
kick_log(KICK_LOG_DEBUG, "[diag] dmabuf planes=%d "
"format=0x%x mod=0x%llx\n",
dma.n_planes, dma.format,
(unsigned long long)dma.modifier);
}
}
if (!is_dma) {
/* shm buffer: flag for KICK_AUTODUMP; at debug level also count
non-black pixels and save the client's own buffer so we can tell
"client painted nothing" from "we failed to import". */
void *data;
uint32_t fmt;
size_t stride;
if (wlr_buffer_begin_data_ptr_access(
cbuf, WLR_BUFFER_DATA_PTR_ACCESS_READ,
&data, &fmt, &stride)) {
client_dumped = true;
if (kick_log_level() >= KICK_LOG_DEBUG) {
int bw = cbuf->width, bh = cbuf->height;
unsigned long nonblack = 0, lum = 0;
unsigned char *p = data;
for (int yy = 0; yy < bh; yy++) {
unsigned char *row = p + (size_t)yy * stride;
for (int xx = 0; xx < bw; xx++) {
unsigned long v = row[xx*4+0] + row[xx*4+1]
+ row[xx*4+2];
lum += v;
if (v > 12) nonblack++;
}
}
kick_log(KICK_LOG_DEBUG, "[diag] shm fmt=0x%x "
"nonblack=%lu/%lu mean=%lu\n", fmt, nonblack,
(unsigned long)bw * bh,
lum / ((unsigned long)bw * bh + 1));
char cpath[64];
snprintf(cpath, sizeof(cpath), "/tmp/client_%d.ppm",
dump_seq);
FILE *cf = fopen(cpath, "wb");
if (cf) {
fprintf(cf, "P6\n%d %d\n255\n", bw, bh);
unsigned char *cp = data;
for (int yy = 0; yy < bh; yy++) {
unsigned char *crow = cp + (size_t)yy * stride;
for (int xx = 0; xx < bw; xx++) {
fputc(crow[xx*4+0], cf);
fputc(crow[xx*4+1], cf);
fputc(crow[xx*4+2], cf);
}
}
fclose(cf);
kick_log(KICK_LOG_DEBUG, "[diag] client buffer "
"-> %s\n", cpath);
}
}
wlr_buffer_end_data_ptr_access(cbuf);
}
}
}
}
/* Insert `tab` in server.tabs immediately after `anchor`; append at the far
right if anchor is NULL or no longer present. */
static void insert_tab_after(struct kick_tab *tab, struct kick_tab *anchor) {
if (anchor)
wl_list_insert(&anchor->link, &tab->link);
else
wl_list_insert(server.tabs.prev, &tab->link);
}
/* A new toplevel joins an existing tab when its client was forked -- directly
or transitively -- from an already-connected client: the shell running
inside a terminal tab forks gnome-calculator, so the calculator's pid chain
runs back through the shell to the terminal client. Exact pid equality (a
client opening a second toplevel) is the depth-0 case. Walk /proc/<pid>/stat
ppid links, capped, to find the owning tab; NULL if the client is not
descended from any tab. */
static struct kick_tab *tab_group_owner(pid_t cpid) {
if (cpid <= 1)
return NULL;
pid_t p = cpid;
for (int depth = 0; depth < 8; depth++) {
struct kick_tab *t;
wl_list_for_each(t, &server.tabs, link) {
struct kick_window *w;
wl_list_for_each(w, &t->windows, link)
if (window_live(w) && w->client_pid == p)
return t;
}
char path[64];
snprintf(path, sizeof(path), "/proc/%d/stat", (int)p);
int fd = open(path, O_RDONLY | O_CLOEXEC);
if (fd < 0)
return NULL;
char buf[4096];
ssize_t n = read(fd, buf, sizeof(buf) - 1);
close(fd);
if (n <= 0)
return NULL;
buf[n] = '\0';
char *last = strrchr(buf, ')');
if (!last)
return NULL;
char state;
pid_t ppid = -1;
if (sscanf(last + 1, " %c %d", &state, &ppid) != 2 || ppid <= 1)
return NULL;
p = ppid;
}
return NULL;
}
/* =============== Window list operations (unified model) =============== */
/* Move a window `dir` slots within its tab's window list (+1 = toward
newer/right, -1 = toward older/left), wrapping at the ends. Reorders the
overlay row order live; focus and visibility are unchanged (the moved
window keeps the keyboard if it held it). */
static void reorder_window(struct kick_window *w, int dir) {
struct kick_tab *tab = w ? w->tab : NULL;
if (!tab || wl_list_length(&tab->windows) < 2) return;
/* Collect to an array (the established 16-cap pattern) so the wrap
arithmetic reads like the tab reorder: index math first, one splice
after. Node pointers are stable across wl_list_remove. */
struct kick_window *members[16];
int n = 0;
struct kick_window *it;
wl_list_for_each(it, &tab->windows, link)
if (n < 16) members[n++] = it;
int from = -1;
for (int i = 0; i < n; i++)
if (members[i] == w) { from = i; break; }
if (from < 0) return;
int to = (from + dir + n) % n;
if (to == from) return;
wl_list_remove(&w->link);
/* Wrap inserts: right-wrap lands at the head (after the sentinel),
left-wrap at the tail (after the current last node). */
if (dir > 0 && to == 0)
wl_list_insert(&tab->windows, &w->link);
else if (dir < 0 && to == n - 1)
wl_list_insert(tab->windows.prev, &w->link);
else if (dir > 0)
wl_list_insert(&members[to]->link, &w->link); /* after neighbor */
else
wl_list_insert(members[to]->link.prev, &w->link); /* before */
kick_log(KICK_LOG_INFO, "[member] moved app=%d slot %d -> %d\n",
tab_index(tab), from, to);
overlay_refresh_if_visible();
}
/* Rotate the active tab's windows one step in `dir` (-1 = backward): the
plain list of windows (oldest first) steps to the neighbor of whatever is
showing, wrapping at both ends. The list itself is never mutated;
w->focused alone tracks where the rotation sits, so repeated steps walk
the windows deterministically. Returns false when nothing is mapped
(nothing to rotate), leaving the key free to pass through to the client. */
static bool cycle_tab_windows(struct kick_tab *tab, int dir) {
struct kick_window *members[16];
struct kick_window *w;
int n = 0;
wl_list_for_each(w, &tab->windows, link)
if (w->mapped && window_surface(w) && n < 16) members[n++] = w;
if (n == 0)
return false;
int cur = 0;
while (cur < n && members[cur] != tab_current_window(tab)) cur++;
/* An active tab without a focused mapped window counts as the first
(oldest) window, so backward wraps to the newest window and forward to
the oldest -- exactly where cycling picks up from a freshly shown
tab. */
window_enter(members[(cur + dir + n) % n]);
kick_log(KICK_LOG_INFO, "[sub] cycle app=%d\n", tab_index(tab));
kick_request_redraw();
return true;
}
/* Whether a newly-mapped window should grab keyboard focus. Shared by the
xdg and X11 map handlers. */
static bool window_map_should_activate(struct kick_window *w) {
if (w->origin == ORIGIN_ADD_TAB)
return true;
if (w->origin == ORIGIN_GROUP && w->parent_tab) {
if (w->is_x11)
return w->parent_tab == server.active_tab;
struct kick_window *first = tab_first_window(w->parent_tab);
return first && first->toplevel &&
first->toplevel == active_toplevel();
}
return w->tab == server.active_tab && !tab_visible(w->tab);
}
/* Content-type name for the debug log. Queried on demand from the
manager (the protocol has no change event); "none" covers untagged
surfaces and a missing manager alike. */
static const char *surface_content_type_name(struct wlr_surface *s) {
if (!s || !server.content_type_mgr)
return "none";
switch (wlr_surface_get_content_type_v1(server.content_type_mgr, s)) {
case WP_CONTENT_TYPE_V1_TYPE_PHOTO:
return "photo";
case WP_CONTENT_TYPE_V1_TYPE_VIDEO:
return "video";
case WP_CONTENT_TYPE_V1_TYPE_GAME:
return "game";
default:
return "none";
}
}
static void handle_window_map(struct wl_listener *listener, void *data) {
(void)data;
struct kick_window *w = wl_container_of(listener, w, map);
w->mapped = true;
#if HAVE_XWAYLAND
/* X11 windows that joined a --tab-groups group are transients -- menus,
dialogs, palettes -- not workspaces: they keep their own geometry and
float at the absolute position their client chose. Never configure
them to the output size (that reallocates their backing store to
garbage and stretches menus across the screen); just place the node.
X11 windows that own a tab (CLI/Add-tab/external, and a --tab-groups
off related window on its own tab) get the maximized treatment like
any tab. */
if (w->is_x11 && w->xsurface && w->tree) {
if (w->origin == ORIGIN_GROUP && w->tab == w->parent_tab) {
wlr_scene_node_set_position(&w->tree->node,
w->xsurface->x, w->xsurface->y);
} else {
x11_initial_configure(w->xsurface);
}
}
#endif
if (kick_log_level() >= KICK_LOG_DEBUG)
kick_log(KICK_LOG_DEBUG, "[diag] map app=%d content=%s\n",
tab_index(w->tab),
surface_content_type_name(window_surface(w)));
/* A new tab never steals focus on its own. The exceptions: an
Alt+Shift+T terminal (add_tab), a tab-group window glued after a shown
parent tab, and the active tab's own first map (a still-black tab
revealed the moment its first frame arrives). Every other map stays
hidden -- the overlay and cycling reach it, but it does not yank the
active surface. A window's toplevel/xsurface is set at claim time
(before its map), so "is it already shown?" is whether any window tree
in the tab is enabled, not whether active_toplevel() is set. */
bool activate = window_map_should_activate(w);
/* Modal dialogs demand attention: a late dialog object (created between
claim and map) is mirrored here, then the modal takes its tab. */
if (!w->dialog_wired && w->toplevel)
dialog_wire(w, wlr_xdg_dialog_v1_try_from_wlr_xdg_toplevel(w->toplevel));
/* A window claimed while its tab was still black may have been drawn with
a placeholder icon; once a real client maps it, re-resolve the icon so
the overlay picks up its app_id. */
w->icon_resolved = false;
if (w->modal) {
modal_activate(w);
} else if (activate) {
if (w->origin == ORIGIN_GROUP && w->tab == w->parent_tab) {
/* A grouped window of a shown parent tab takes the keyboard
within it; whether it wins the seat depends on the parent tab
being the one shown, which is exactly the activate test. It
does NOT promote the tab or emit an active transition. */
kick_log(KICK_LOG_INFO, "[sub] focus app=%d\n", tab_index(w->tab));
window_enter(w);
} else if (w->origin == ORIGIN_GROUP) {
/* --tab-groups off: the related window OWNS the showing tab
(tab != parent_tab), so its map promotes that tab like any
fresh tab -- the crown follows what the screen shows. */
set_active_tab(w->tab);
} else if (w->tab == server.active_tab) {
/* The active tab's own black crown revealed: the tab was crowned
while still pending (no surface, so no seat enter there), and
its first map promotes it without announcing a fresh active
transition -- the boot crown already owns the tab. */
kick_log(KICK_LOG_INFO, "[sub] focus app=%d\n", tab_index(w->tab));
window_enter(w);
} else {
set_active_tab(w->tab);
}
} else if (server.active_tab == w->tab) {
/* A window joining an already-shown active tab takes the keyboard
within it. For the active tab's own window a re-map stays quiet
(activate is false for a visible tab), so only genuine arrivals
grab the keyboard -- same rule the old member_enter applied. */
kick_log(KICK_LOG_INFO, "[sub] focus app=%d\n", tab_index(w->tab));
window_enter(w);
} else {
kick_log(KICK_LOG_INFO, "[sub] map app=%d\n", tab_index(w->tab));
}
/* A newly mapped window of the shown tab joins outside the normal
commit-damage flow (X11 windows can even pair and commit before
classification attaches them): the enable/position surgery here
doesn't reliably produce output damage on its own, so the first frame
shows black until an unrelated repaint. Force a full repaint for
every window arrival on the shown tab, any backend. */
if (server.active_tab == w->tab && server.scene_output)
wlr_damage_ring_add_whole(&server.scene_output->damage_ring);
/* The first commit that maps the toplevel carries its final app_id/title
(the client sends them in the same commit as the first buffer). The
wlroots set_title/set_app_id signals already fired before claim, so
re-sync the taskbar handles here to the post-map values. The activated
flag is set downstream by window_enter/set_active_tab via
window_set_activated, but reflect whatever focus we just settled on. */
foreign_sync_output(w);
foreign_sync_title(w);
foreign_sync_app_id(w);
if (w->ft_handle)
wlr_foreign_toplevel_handle_v1_set_activated(w->ft_handle, w->focused);
overlay_refresh_if_visible();
}
static void handle_window_unmap(struct wl_listener *listener, void *data) {
(void)data;
struct kick_window *w = wl_container_of(listener, w, unmap);
w->mapped = false;
if (w->focused)
refocus_tab(w->tab);
}
/* Allocate a window struct bound to `tab` and append it to the tab's window
list (newest at the tail). The caller sets kind/protocol pointers and
listeners right after. */
static struct kick_window *window_alloc(struct kick_tab *tab) {
struct kick_window *w = calloc(1, sizeof(*w));
if (!w) return NULL;
w->tab = tab;
wl_list_insert(tab->windows.prev, &w->link);
return w;
}
/* Claim an xdg toplevel by hanging it on `w` (a pending/black window or a
freshly allocated one): back the window struct with the toplevel and its
scene tree, record the client's pid/process group, and attach the full
listener set. */
static void claim_xdg_window(struct kick_tab *tab, struct kick_window *w,
struct wlr_xdg_toplevel *toplevel, pid_t cpid,
pid_t pgid) {
w->toplevel = toplevel;
w->pending_claim = false;
w->client_pid = cpid;
w->pgid = (pgid > 0 && pgid != getpgid(0)) ? pgid : -1;
w->tree = wlr_scene_xdg_surface_create(&server.scene->tree, toplevel->base);
layer_raise_above_windows();
/* First commit keeps the window on the tab bar; the scene tree shows
nothing until a map makes the tab (or its client) current. Without
this the node starts enabled and a still-black pending window of the
active tab reads as "already drawn", so its first map skips the seat
enter. */
wlr_scene_node_set_enabled(&w->tree->node, false);
/* [claim] ties the window to the *connected client's* PID, so tests can
kill the tab that is actually active. A grouped window of a shown
parent tab is announced as [sub] stack instead: it never claims a slot
of its own. A --tab-groups off related window on its OWN tab claims
a real slot, so it logs [claim]. */
if (w->origin == ORIGIN_GROUP && w->tab == w->parent_tab)
kick_log(KICK_LOG_INFO, "[sub] stack app=%d\n", tab_index(tab));
else
kick_log(KICK_LOG_INFO, "[claim] app=%d pid=%d\n",
tab_index(tab), (int)cpid);
w->destroy.notify = handle_toplevel_destroy;
wl_signal_add(&toplevel->events.destroy, &w->destroy);
w->map.notify = handle_window_map;
wl_signal_add(&toplevel->base->surface->events.map, &w->map);
w->unmap.notify = handle_window_unmap;
wl_signal_add(&toplevel->base->surface->events.unmap, &w->unmap);
w->commit.notify = handle_toplevel_commit;
wl_signal_add(&toplevel->base->surface->events.commit, &w->commit);
w->set_title.notify = handle_window_meta;
wl_signal_add(&toplevel->events.set_title, &w->set_title);
w->set_app_id.notify = handle_window_meta;
wl_signal_add(&toplevel->events.set_app_id, &w->set_app_id);
/* Expose the window to taskbars once it has a toplevel (title/app_id may
still be blank until the client commits them; later set_title/
set_app_id events re-sync the handles). */
foreign_handle_create(w);
/* Tell the surface the output scale up front: clients that wait for
preferred_scale before sizing assets would otherwise guess. The
scale is fixed per session, so one notification covers the surface. */
if (server.fractional_scale_mgr && toplevel->base->surface) {
double scale = server.output ? (double)server.output->scale : 1.0;
wlr_fractional_scale_v1_notify_scale(toplevel->base->surface, scale);
}
w->request_maximize.notify = handle_request_maximize;
wl_signal_add(&toplevel->events.request_maximize, &w->request_maximize);
w->request_fullscreen.notify = handle_request_fullscreen;
wl_signal_add(&toplevel->events.request_fullscreen, &w->request_fullscreen);
w->request_minimize.notify = handle_request_minimize;
wl_signal_add(&toplevel->events.request_minimize, &w->request_minimize);
w->request_move.notify = handle_request_move;
wl_signal_add(&toplevel->events.request_move, &w->request_move);
w->request_resize.notify = handle_request_resize;
wl_signal_add(&toplevel->events.request_resize, &w->request_resize);
}
static void handle_new_toplevel(struct wl_listener *listener, void *data) {
(void)listener;
struct wlr_xdg_toplevel *toplevel = data;
pid_t cpid = -1;
if (toplevel->base->client)
wl_client_get_credentials(toplevel->base->client->client,
&cpid, NULL, NULL);
/* A window awaiting its toplevel -- an unclaimed command-line command or
a fresh Alt+Shift+T terminal -- belongs to exactly ONE client: the one
WE launched for it. launch_client() runs each command in its own
process group (setpgid(0,0)), so the connected client's group id
equals the launcher pid w->pid, including through a shell wrapper
(`sh -c "foot -e htop"`). Matching by group -- not exact pid -- is
what keeps a wrapped command on its own command-line slot. A client
from a group we never created (an external one) never matches, so it
can't steal a still-loading tab's position. */
pid_t pgid = cpid > 0 ? getpgid(cpid) : -1;
struct kick_window *w = NULL;
struct kick_tab *tab;
wl_list_for_each(tab, &server.tabs, link) {
struct kick_window *cand;
wl_list_for_each(cand, &tab->windows, link) {
if (cand->toplevel || !cand->pending_claim) continue;
if (cand->pid > 0 && cand->pid == pgid) {
w = cand;
break;
}
}
if (w) break;
}
/* A second toplevel from a client that already owns a tab: with
--tab-groups on it joins its owner's window list; otherwise it gets
its own tab glued right after its parent (the protocol parent, else
the owning tab), never touching a reserved pending window.
Command-line commands are all forked at startup (see launch_all_cli);
their clients match the pending loop above, and only then. */
if (!w && cpid > 0) {
struct kick_tab *owner = tab_group_owner(cpid);
if (owner) {
if (tab_groups) {
w = window_alloc(owner);
} else {
struct kick_tab *nt = calloc(1, sizeof(*nt));
if (!nt) return;
wl_list_init(&nt->windows);
w = window_alloc(nt);
if (!w) { free(nt); return; }
struct kick_window *pa = toplevel->parent
? window_for_toplevel(toplevel->parent) : NULL;
insert_tab_after(nt, pa ? pa->tab : owner);
}
if (!w) return;
w->origin = ORIGIN_GROUP;
w->parent_tab = owner;
}
}
/* No pending window matched and no owner tab: an external client. Give
it its own tab so it appears on top and stays reachable via tab
cycling, right after the tab that created it (protocol parent, else
the active tab); far right if unidentified. */
if (!w) {
struct kick_tab *nt = calloc(1, sizeof(*nt));
if (!nt) return;
wl_list_init(&nt->windows);
w = window_alloc(nt);
if (!w) { free(nt); return; }
struct kick_window *pa = toplevel->parent
? window_for_toplevel(toplevel->parent) : NULL;
if (!pa)
pa = tab_current_window(server.active_tab);
insert_tab_after(nt, pa ? pa->tab : NULL);
w->origin = ORIGIN_EXTERNAL;
}
claim_xdg_window(w->tab, w, toplevel, cpid, pgid);
/* A dialog object created in the same commit as the toplevel already
exists: mirror it now (later ones arrive via handle_dialog_new). */
dialog_wire(w, wlr_xdg_dialog_v1_try_from_wlr_xdg_toplevel(toplevel));
}
#if HAVE_XWAYLAND
/* ===================== XWayland (X11 tabs) ===================== */
/* An X11 window becomes a window of a tab exactly like an xdg toplevel:
claimed against a pending command-line window by process group, linked
into its ancestor's tab, or given its own tab as an external. Two
structural differences drive the code below:
- Every X11 window belongs to ONE Wayland client (the Xwayland process),
so client identity comes from xsurface->pid -- the real X client's PID
from _NET_WM_PID -- never from wl_client credentials.
- The wlr_surface only exists between the associate/dissociate events,
so the surface map/commit listeners are attached there, not at claim
time (dissociate always precedes destroy; a flag guards both orders).
Override-redirect windows (menus, tooltips) are handled further below:
they float above the tabs and never become windows of a tab. */
static void handle_xs_surface_map(struct wl_listener *listener, void *data);
static void handle_xs_commit(struct wl_listener *listener, void *data);
static void handle_xs_associate(struct wl_listener *listener, void *data);
static void or_handle_map(struct wl_listener *listener, void *data);
static void or_handle_unmap(struct wl_listener *listener, void *data);
static void or_handle_commit(struct wl_listener *listener, void *data);
static struct kick_window *window_for_xsurface(struct wlr_xwayland_surface *xs) {
if (!xs) return NULL;
struct kick_tab *tab;
wl_list_for_each(tab, &server.tabs, link) {
struct kick_window *w;
wl_list_for_each(w, &tab->windows, link)
if (w->xsurface == xs)
return w;
}
return NULL;
}
/* Keep a managed X11 window's content at the tab origin: kick configures
every tab to the full output at 0,0, so a client that placed itself
elsewhere before obeying gets its offset cropped (mirrors position_tree's
CSD-gutter handling). Offsets beyond the output are ignored rather than
blanking the whole tab. */
static void x11_sync_position(struct kick_window *w) {
struct wlr_xwayland_surface *xs = w->xsurface;
if (!xs || !w->tree || !server.output) return;
int nx = (xs->x > 0 && xs->x < server.output->width) ? -xs->x : 0;
int ny = (xs->y > 0 && xs->y < server.output->height) ? -xs->y : 0;
wlr_scene_node_set_position(&w->tree->node, nx + server.layout_x,
ny + server.layout_y);
}
/* Maximize-and-size treatment shared by new X11 tabs (X11 has no
initial_commit to hook, and reconfiguring on every map is idempotent). */
static void x11_initial_configure(struct wlr_xwayland_surface *xs) {
if (!xs || !xs->surface || !server.output) return;
wlr_xwayland_surface_configure(xs, 0, 0,
(uint16_t)server.output->width,
(uint16_t)server.output->height);
wlr_xwayland_surface_set_maximized(xs, true, true);
if (server.clients_fullscreen)
wlr_xwayland_surface_set_fullscreen(xs, true);
}
/* Claim an X11 toplevel by backing `w` with the xwayland surface: a scene
tree, the client's pid/process group, and the full X11 listener set. The
surface map/commit listeners attach later, at associate (the surface only
exists between associate/dissociate). */
static void handle_xs_destroy(struct wl_listener *listener, void *data);
static void handle_xs_associate(struct wl_listener *listener, void *data);
static void handle_xs_dissociate(struct wl_listener *listener, void *data);
static void handle_xs_commit(struct wl_listener *listener, void *data);
static void handle_xs_surface_map(struct wl_listener *listener, void *data);
static void handle_xs_request_maximize(struct wl_listener *listener,
void *data);
static void handle_xs_request_minimize(struct wl_listener *listener,
void *data);
static void handle_xs_request_fullscreen(struct wl_listener *listener,
void *data);
static void handle_xs_request_configure(struct wl_listener *listener,
void *data);
static void handle_xs_request_activate(struct wl_listener *listener,
void *data);
static void handle_xs_request_close(struct wl_listener *listener, void *data);
static void handle_xs_set_title(struct wl_listener *listener, void *data);
static void handle_xs_set_class(struct wl_listener *listener, void *data);
static void claim_x11_window(struct kick_tab *tab, struct kick_window *w,
struct wlr_xwayland_surface *xsurface,
pid_t xpid, pid_t pgid) {
w->is_x11 = true;
w->xsurface = xsurface;
w->pending_claim = false;
w->client_pid = xpid;
w->pgid = (pgid > 0 && pgid != getpgid(0)) ? pgid : -1;
w->tree = wlr_scene_tree_create(&server.scene->tree);
if (!w->tree) {
w->is_x11 = false;
w->xsurface = NULL;
return;
}
layer_raise_above_windows();
/* hidden until it becomes the active tab */
wlr_scene_node_set_enabled(&w->tree->node, false);
/* A grouped window (a transient of its owner tab) never claims a slot
of its own; [claim] ties a tab-owning window to the connected client's
PID. A --tab-groups off related window on its own tab claims a real
slot, so it logs [claim]. */
if (w->origin == ORIGIN_GROUP && w->tab == w->parent_tab)
kick_log(KICK_LOG_INFO, "[sub] stack app=%d\n", tab_index(tab));
else
kick_log(KICK_LOG_INFO, "[claim] app=%d pid=%d\n",
tab_index(tab), (int)xpid);
w->destroy.notify = handle_xs_destroy;
wl_signal_add(&xsurface->events.destroy, &w->destroy);
w->xs_associate.notify = handle_xs_associate;
wl_signal_add(&xsurface->events.associate, &w->xs_associate);
w->xs_dissociate.notify = handle_xs_dissociate;
wl_signal_add(&xsurface->events.dissociate, &w->xs_dissociate);
w->request_maximize.notify = handle_xs_request_maximize;
wl_signal_add(&xsurface->events.request_maximize, &w->request_maximize);
w->request_fullscreen.notify = handle_xs_request_fullscreen;
wl_signal_add(&xsurface->events.request_fullscreen,
&w->request_fullscreen);
w->request_minimize.notify = handle_xs_request_minimize;
wl_signal_add(&xsurface->events.request_minimize, &w->request_minimize);
w->xs_request_configure.notify = handle_xs_request_configure;
wl_signal_add(&xsurface->events.request_configure,
&w->xs_request_configure);
w->xs_request_activate.notify = handle_xs_request_activate;
wl_signal_add(&xsurface->events.request_activate,
&w->xs_request_activate);
w->xs_request_close.notify = handle_xs_request_close;
wl_signal_add(&xsurface->events.request_close, &w->xs_request_close);
w->xs_set_title.notify = handle_xs_set_title;
wl_signal_add(&xsurface->events.set_title, &w->xs_set_title);
w->xs_set_class.notify = handle_xs_set_class;
wl_signal_add(&xsurface->events.set_class, &w->xs_set_class);
/* Membership now begins at first map, which can land after the xwm has
already paired the window's wl_surface (associate fired before we
existed to hear it). Attach the scene surface immediately in that
case, and run the map treatment when the surface is already live. */
if (xsurface->surface) {
handle_xs_associate(&w->xs_associate, NULL);
if (xsurface->surface->mapped)
handle_xs_surface_map(&w->map, NULL);
}
/* Expose the X11 window to taskbars (title/class sync via the
set_title/set_class handlers below, which call into foreign_sync_*). */
foreign_handle_create(w);
}
/* --- Managed X11 windows --- */
static void handle_xs_associate(struct wl_listener *listener, void *data) {
(void)data;
struct kick_window *w = wl_container_of(listener, w, xs_associate);
if (!w->xsurface || !w->xsurface->surface || !w->tree) return;
/* The scene node rendering the window's buffers; recreated per
association (the wlr_surface dies with it). */
wlr_scene_surface_create(w->tree, w->xsurface->surface);
w->map.notify = handle_xs_surface_map;
wl_signal_add(&w->xsurface->surface->events.map, &w->map);
w->unmap.notify = handle_window_unmap;
wl_signal_add(&w->xsurface->surface->events.unmap, &w->unmap);
w->commit.notify = handle_xs_commit;
wl_signal_add(&w->xsurface->surface->events.commit, &w->commit);
w->xs_surface_linked = true;
/* Membership starts at first map, so association can arrive after the
window already mapped and committed (an instantly-shown menu popup):
the map event fired before this listener existed. Replay it (the
caller does), or the grouped window stays an invisible phantom with
live content behind it. */
if (w->origin == ORIGIN_GROUP) {
bool mapped = w->xsurface->surface->mapped;
kick_log(KICK_LOG_DEBUG, "[x11] member associate app=%d%s\n",
tab_index(w->tab), mapped ? " (late: already mapped)" : "");
}
}
static void handle_xs_dissociate(struct wl_listener *listener, void *data) {
(void)data;
struct kick_window *w = wl_container_of(listener, w, xs_dissociate);
if (!w->xs_surface_linked) return;
wl_list_remove(&w->map.link);
wl_list_remove(&w->unmap.link);
wl_list_remove(&w->commit.link);
w->xs_surface_linked = false;
}
static void handle_xs_commit(struct wl_listener *listener, void *data) {
(void)data;
struct kick_window *w = wl_container_of(listener, w, commit);
x11_sync_position(w);
}
static void handle_xs_surface_map(struct wl_listener *listener, void *data) {
(void)data;
struct kick_window *w = wl_container_of(listener, w, map);
w->mapped = true;
if (kick_log_level() >= KICK_LOG_DEBUG)
kick_log(KICK_LOG_DEBUG, "[diag] map app=%d\n", tab_index(w->tab));
/* Same geometry rule as handle_window_map: X11 windows that grouped onto a
--tab-groups parent tab are transients -- menus, dialogs, palettes --
they keep their own geometry and float at the absolute position their
client chose; never configure them to the output size (that reallocates
their backing store to garbage and stretches menus across the screen),
just place the node. X11 windows that own a tab -- including a
--tab-groups off related window on its own tab -- get the maximized
treatment like any tab. */
if (w->origin == ORIGIN_GROUP && w->tab == w->parent_tab) {
wlr_scene_node_set_position(&w->tree->node,
w->xsurface->x, w->xsurface->y);
} else {
x11_initial_configure(w->xsurface);
}
/* Same no-steal activation policy as handle_window_map. */
bool activate = window_map_should_activate(w);
/* A slot claimed while black may show a placeholder icon; re-resolve
against the now-known WM_CLASS. */
w->icon_resolved = false;
if (activate) {
if (w->origin == ORIGIN_GROUP && w->tab == w->parent_tab) {
kick_log(KICK_LOG_INFO, "[sub] focus app=%d\n", tab_index(w->tab));
window_enter(w);
} else if (w->origin == ORIGIN_GROUP) {
/* --tab-groups off: the related window owns its own tab, so the
map promotes it exactly like a fresh external tab. */
set_active_tab(w->tab);
} else if (w->tab == server.active_tab) {
/* Same-tab promotion of the black crown, without a fresh active
transition (mirrors handle_window_map). */
kick_log(KICK_LOG_INFO, "[sub] focus app=%d\n", tab_index(w->tab));
window_enter(w);
} else {
set_active_tab(w->tab);
}
} else if (server.active_tab == w->tab) {
kick_log(KICK_LOG_INFO, "[sub] focus app=%d\n", tab_index(w->tab));
window_enter(w);
} else {
kick_log(KICK_LOG_INFO, "[sub] map app=%d\n", tab_index(w->tab));
}
/* A newly mapped window of the shown tab joins outside the normal
commit-damage flow; force a full repaint, any backend. */
if (server.active_tab == w->tab && server.scene_output)
wlr_damage_ring_add_whole(&server.scene_output->damage_ring);
overlay_refresh_if_visible();
}
static void handle_xs_destroy(struct wl_listener *listener, void *data) {
(void)data;
struct kick_window *w = wl_container_of(listener, w, destroy);
w->xsurface = NULL;
w->tree = NULL;
/* Same overlay-damage cleanup as handle_toplevel_destroy. */
if (host.overlay_visible && server.standalone)
standalone_overlay_damage();
window_detach_x11_listeners(w);
window_destroy_common(w);
}
static void handle_xs_request_maximize(struct wl_listener *listener,
void *data) {
(void)data;
struct kick_window *w = wl_container_of(listener, w, request_maximize);
/* Every kick tab lives maximized; acknowledge the state change. */
if (w->xsurface)
wlr_xwayland_surface_set_maximized(w->xsurface, true, true);
}
static void handle_xs_request_minimize(struct wl_listener *listener,
void *data) {
(void)listener; (void)data;
/* kick has no minimized state: tabs are shown or hidden. */
}
static void handle_xs_request_fullscreen(struct wl_listener *listener,
void *data) {
(void)data;
struct kick_window *w = wl_container_of(listener, w, request_fullscreen);
struct wlr_xwayland_surface *xs = w->xsurface;
if (!xs) return;
/* Mirror onto the host window like the xdg path. */
bool fs = xs->fullscreen;
wlr_xwayland_surface_set_fullscreen(xs, fs);
kick_log(KICK_LOG_INFO, "client fullscreen=%d\n", fs);
host_apply_fullscreen(fs);
}
static void handle_xs_request_configure(struct wl_listener *listener,
void *data) {
(void)data;
struct kick_window *w = wl_container_of(listener, w,
xs_request_configure);
/* The WM answer to any geometry request: maximized at the output size. */
x11_initial_configure(w->xsurface);
}
static void handle_xs_request_activate(struct wl_listener *listener,
void *data) {
(void)data;
struct kick_window *w = wl_container_of(listener, w, xs_request_activate);
/* An explicit activation request (the app's own window list, a pager)
may steal focus, exactly like Alt-cycling onto the tab. */
set_active_tab(w->tab);
}
static void handle_xs_request_close(struct wl_listener *listener, void *data) {
(void)data;
struct kick_window *w = wl_container_of(listener, w, xs_request_close);
/* A tab-group X11 window (a transient grouped onto the owner's tab)
closing on its own only drops out of the tab -- its destroy path
handles it -- so leave it be. A --tab-groups off related window owns
its tab outright, so its close tears the tab down, matching Alt+Delete
and the Wayland behavior. */
if (w->origin == ORIGIN_GROUP && w->tab == w->parent_tab)
return;
close_window(w);
}
static void handle_xs_set_title(struct wl_listener *listener, void *data) {
(void)data;
struct kick_window *w = wl_container_of(listener, w, xs_set_title);
/* Picked up by the overlay row on its next draw (row_title cache). */
(void)w;
overlay_refresh_if_visible();
if (w && w->ft_handle)
wlr_foreign_toplevel_handle_v1_set_title(w->ft_handle, foreign_str(window_title(w)));
if (w && w->ext_handle) {
struct wlr_ext_foreign_toplevel_handle_v1_state st = {
.title = foreign_str(window_title(w)),
.app_id = foreign_str(window_app_id(w)),
};
wlr_ext_foreign_toplevel_handle_v1_update_state(w->ext_handle, &st);
}
}
static void handle_xs_set_class(struct wl_listener *listener, void *data) {
(void)data;
struct kick_window *w = wl_container_of(listener, w, xs_set_class);
overlay_refresh_if_visible();
/* Re-resolve the overlay icon against the new WM_CLASS. */
w->icon_resolved = false;
if (w->ft_handle)
wlr_foreign_toplevel_handle_v1_set_app_id(w->ft_handle,
foreign_str(window_app_id(w)));
if (w->ext_handle) {
struct wlr_ext_foreign_toplevel_handle_v1_state st = {
.title = foreign_str(window_title(w)),
.app_id = foreign_str(window_app_id(w)),
};
wlr_ext_foreign_toplevel_handle_v1_update_state(w->ext_handle, &st);
}
}
/* --- Override-redirect windows (menus, tooltips, popups) ---
Never tabs: they float above every tab tree at their absolute X position
while mapped, and take the keyboard only when their window type says they
want it (rofi-style launchers). */
struct kick_or_window {
struct wlr_xwayland_surface *xsurface;
struct wlr_scene_tree *tree;
bool surface_linked;
bool took_focus;
struct wl_listener destroy;
struct wl_listener associate;
struct wl_listener dissociate;
struct wl_listener map;
struct wl_listener unmap;
struct wl_listener commit;
struct wl_listener set_geometry;
struct wl_list link; /* server.or_windows */
};
static void or_window_position(struct kick_or_window *orw) {
struct wlr_xwayland_surface *xs = orw->xsurface;
if (!xs || !orw->tree) return;
/* Absolute layout coordinates: menus open where the app put them. */
wlr_scene_node_set_position(&orw->tree->node, xs->x, xs->y);
}
/* Hand the keyboard back to the tab that held it before this window took
it (or clear focus when nothing did). */
static void or_window_focus_release(struct kick_or_window *orw) {
if (!orw->took_focus) return;
orw->took_focus = false;
struct kick_tab *owner = server.or_focus_owner;
server.or_focus_owner = NULL;
if (owner)
set_active_tab(owner);
else
wlr_seat_keyboard_notify_clear_focus(server.seat);
}
static void or_handle_associate(struct wl_listener *listener, void *data) {
(void)data;
struct kick_or_window *orw = wl_container_of(listener, orw, associate);
if (!orw->xsurface || !orw->xsurface->surface || !orw->tree) return;
wlr_scene_surface_create(orw->tree, orw->xsurface->surface);
orw->map.notify = or_handle_map;
wl_signal_add(&orw->xsurface->surface->events.map, &orw->map);
orw->unmap.notify = or_handle_unmap;
wl_signal_add(&orw->xsurface->surface->events.unmap, &orw->unmap);
orw->commit.notify = or_handle_commit;
wl_signal_add(&orw->xsurface->surface->events.commit, &orw->commit);
orw->surface_linked = true;
or_window_position(orw);
/* Same late-map replay as the member path: an override-redirect popup
can map and commit before its surface pairing reaches us. */
bool mapped = orw->xsurface->surface->mapped;
kick_log(KICK_LOG_DEBUG, "[x11] or associate class=%s%s\n",
orw->xsurface->class ? orw->xsurface->class : "?",
mapped ? " (late: already mapped)" : "");
if (mapped)
or_handle_map(&orw->map, NULL);
}
static void or_handle_dissociate(struct wl_listener *listener, void *data) {
(void)data;
struct kick_or_window *orw = wl_container_of(listener, orw, dissociate);
if (!orw->surface_linked) return;
wl_list_remove(&orw->map.link);
wl_list_remove(&orw->unmap.link);
wl_list_remove(&orw->commit.link);
orw->surface_linked = false;
}
static void or_handle_map(struct wl_listener *listener, void *data) {
(void)data;
struct kick_or_window *orw = wl_container_of(listener, orw, map);
wlr_scene_node_set_enabled(&orw->tree->node, true);
or_window_position(orw);
/* Late-associated OR popups join already-mapped, outside the commit
damage flow -- same first-frame-black hazard as X11 members. */
if (server.scene_output)
wlr_damage_ring_add_whole(&server.scene_output->damage_ring);
if (wlr_xwayland_surface_override_redirect_wants_focus(orw->xsurface)) {
if (!server.or_focus_owner && server.active_tab)
server.or_focus_owner = server.active_tab;
orw->took_focus = true;
struct wlr_keyboard *kbd = wlr_seat_get_keyboard(server.seat);
if (!kbd) kbd = &server.keyboard;
wlr_seat_keyboard_notify_enter(server.seat,
orw->xsurface->surface,
kbd->keycodes, kbd->num_keycodes, &kbd->modifiers);
}
kick_request_redraw();
}
static void or_handle_unmap(struct wl_listener *listener, void *data) {
(void)data;
struct kick_or_window *orw = wl_container_of(listener, orw, unmap);
wlr_scene_node_set_enabled(&orw->tree->node, false);
or_window_focus_release(orw);
kick_request_redraw();
}
static void or_handle_commit(struct wl_listener *listener, void *data) {
(void)data;
struct kick_or_window *orw = wl_container_of(listener, orw, commit);
or_window_position(orw);
}
static void or_handle_set_geometry(struct wl_listener *listener, void *data) {
(void)data;
struct kick_or_window *orw = wl_container_of(listener, orw, set_geometry);
or_window_position(orw);
}
static void or_handle_destroy(struct wl_listener *listener, void *data) {
(void)data;
struct kick_or_window *orw = wl_container_of(listener, orw, destroy);
wl_list_remove(&orw->destroy.link);
wl_list_remove(&orw->associate.link);
wl_list_remove(&orw->dissociate.link);
wl_list_remove(&orw->set_geometry.link);
if (orw->surface_linked) {
wl_list_remove(&orw->map.link);
wl_list_remove(&orw->unmap.link);
wl_list_remove(&orw->commit.link);
orw->surface_linked = false;
}
or_window_focus_release(orw);
wl_list_remove(&orw->link);
free(orw);
kick_request_redraw();
}
static void or_window_create(struct wlr_xwayland_surface *xsurface) {
struct kick_or_window *orw = calloc(1, sizeof(*orw));
if (!orw) return;
orw->xsurface = xsurface;
orw->tree = wlr_scene_tree_create(&server.scene->tree);
if (!orw->tree) {
free(orw);
return;
}
layer_raise_above_windows();
wlr_scene_node_set_enabled(&orw->tree->node, false);
orw->associate.notify = or_handle_associate;
wl_signal_add(&xsurface->events.associate, &orw->associate);
orw->dissociate.notify = or_handle_dissociate;
wl_signal_add(&xsurface->events.dissociate, &orw->dissociate);
orw->set_geometry.notify = or_handle_set_geometry;
wl_signal_add(&xsurface->events.set_geometry, &orw->set_geometry);
orw->destroy.notify = or_handle_destroy;
wl_signal_add(&xsurface->events.destroy, &orw->destroy);
if (xsurface->surface) {
/* Defensive: association normally happens after new_surface. */
or_handle_associate(&orw->associate, NULL);
}
wl_list_insert(server.or_windows.prev, &orw->link);
kick_log(KICK_LOG_INFO, "[x11] or window class=%s\n",
xsurface->class ? xsurface->class : "?");
kick_log(KICK_LOG_DEBUG, "[x11] or create wid=%u %dx%d@%d,%d\n",
(unsigned)xsurface->window_id,
(int)xsurface->width, (int)xsurface->height,
(int)xsurface->x, (int)xsurface->y);
}
static void classify_xwayland_window(struct wlr_xwayland_surface *xsurface);
/* An X11 window that has been seen but not yet mapped. GTK toolkits open
an invisible "leader" window before any real frame; it never maps and
never gains a Wayland surface, so membership decisions -- tab claim,
tab-group attach, external append -- wait for the window's first map.
A window that never shows itself never joins the tab set, and is freed
silently when the client destroys it. */
struct kick_x11_pending {
struct wlr_xwayland_surface *xsurface;
struct wl_listener destroy;
struct wl_listener associate; /* bridge to the wlr_surface's map */
struct wl_listener map;
bool surface_hooked;
struct wl_list link; /* server.x11_pendings */
};
static void x11_pending_teardown(struct kick_x11_pending *p) {
wl_list_remove(&p->link);
wl_list_remove(&p->destroy.link);
/* The associate listener is attached unconditionally at new_surface, so
it must be removed unconditionally here too: a window destroyed
before ever associating a Wayland surface (VLC's short-lived
probe windows) leaves it linked otherwise, and wlroots asserts on
the non-empty associate list at destroy. */
wl_list_remove(&p->associate.link);
if (p->surface_hooked)
wl_list_remove(&p->map.link);
free(p);
}
static void x11_pending_handle_map(struct wl_listener *listener, void *data) {
(void)data;
struct kick_x11_pending *p = wl_container_of(listener, p, map);
struct wlr_xwayland_surface *xsurface = p->xsurface;
x11_pending_teardown(p);
classify_xwayland_window(xsurface);
}
static void x11_pending_handle_destroy(struct wl_listener *listener,
void *data) {
(void)data;
struct kick_x11_pending *p = wl_container_of(listener, p, destroy);
kick_log(KICK_LOG_DEBUG, "[x11] pending wid=%u destroyed unmapped\n",
(unsigned)p->xsurface->window_id);
x11_pending_teardown(p); /* never mapped: no tab, no member, no trace */
}
static void x11_pending_handle_associate(struct wl_listener *listener,
void *data) {
(void)data;
struct kick_x11_pending *p = wl_container_of(listener, p, associate);
struct wlr_surface *surface = p->xsurface->surface;
if (!surface || p->surface_hooked)
return;
p->surface_hooked = true;
p->map.notify = x11_pending_handle_map;
wl_signal_add(&surface->events.map, &p->map);
if (surface->mapped) /* defensive: mapped before we could hook */
x11_pending_handle_map(&p->map, NULL);
}
static void handle_xwayland_new_surface(struct wl_listener *listener,
void *data) {
(void)listener;
struct wlr_xwayland_surface *xsurface = data;
if (xsurface->override_redirect) {
or_window_create(xsurface);
return;
}
struct kick_x11_pending *p = calloc(1, sizeof(*p));
if (!p)
return;
p->xsurface = xsurface;
p->destroy.notify = x11_pending_handle_destroy;
wl_signal_add(&xsurface->events.destroy, &p->destroy);
p->associate.notify = x11_pending_handle_associate;
kick_log(KICK_LOG_DEBUG, "[x11] pending wid=%u pid=%d\n",
(unsigned)xsurface->window_id, (int)xsurface->pid);
wl_signal_add(&xsurface->events.associate, &p->associate);
wl_list_insert(server.x11_pendings.prev, &p->link);
}
/* Decide where a newly *mapped* X11 window belongs: claim a pending window
by launcher process group, link it into an ancestor's tab, or append as
an external tab. Mirrors handle_new_toplevel. */
static void classify_xwayland_window(struct wlr_xwayland_surface *xsurface) {
/* The real X client's PID (_NET_WM_PID); 0 when the client didn't set
it, which lands the window in the external-append path below. */
pid_t xpid = xsurface->pid;
pid_t pgid = xpid > 0 ? getpgid(xpid) : -1;
/* Claim a pending window by launcher process group: an X11 command
forked by launch_client inherits its group exactly like a Wayland
client. */
struct kick_window *w = NULL;
struct kick_tab *tab;
wl_list_for_each(tab, &server.tabs, link) {
struct kick_window *cand;
wl_list_for_each(cand, &tab->windows, link) {
if (cand->xsurface || !cand->pending_claim) continue;
if (cand->pid > 0 && cand->pid == pgid) {
w = cand;
break;
}
}
if (w) break;
}
/* A window from a process descended from a connected tab follows the
same group rules as a second xdg toplevel. */
if (!w && xpid > 0) {
struct kick_tab *owner = tab_group_owner(xpid);
if (owner) {
if (tab_groups) {
w = window_alloc(owner);
} else {
struct kick_tab *nt = calloc(1, sizeof(*nt));
if (!nt) return;
wl_list_init(&nt->windows);
w = window_alloc(nt);
if (!w) { free(nt); return; }
struct kick_window *pa = window_for_xsurface(xsurface->parent);
insert_tab_after(nt, pa ? pa->tab : owner);
}
if (!w) return;
w->origin = ORIGIN_GROUP;
w->parent_tab = owner;
}
}
/* No pending window matched and no owner tab: an external client. Give
it its own tab, right after the tab that created it (the surface's
parent, else the active tab). */
if (!w) {
struct kick_tab *nt = calloc(1, sizeof(*nt));
if (!nt) return;
wl_list_init(&nt->windows);
w = window_alloc(nt);
if (!w) { free(nt); return; }
struct kick_window *pa = window_for_xsurface(xsurface->parent);
if (!pa)
pa = tab_current_window(server.active_tab);
insert_tab_after(nt, pa ? pa->tab : NULL);
w->origin = ORIGIN_EXTERNAL;
}
claim_x11_window(w->tab, w, xsurface, xpid, pgid);
}
static void handle_xwayland_ready(struct wl_listener *listener, void *data) {
(void)listener; (void)data;
kick_log(KICK_LOG_INFO, "[xwayland] ready display=%s\n",
server.xwayland && server.xwayland->display_name
? server.xwayland->display_name : "?");
}
static void handle_xwayland_destroy(struct wl_listener *listener, void *data) {
(void)listener; (void)data;
wl_list_remove(&server.xwayland_new_surface.link);
wl_list_remove(&server.xwayland_ready.link);
wl_list_remove(&server.xwayland_destroy.link);
server.xwayland = NULL;
kick_log(KICK_LOG_INFO, "[xwayland] gone\n");
}
#endif /* HAVE_XWAYLAND */
/* ===================== Tab management ===================== */
static struct kick_window *window_for_toplevel(struct wlr_xdg_toplevel *toplevel) {
if (!toplevel) return NULL;
struct kick_tab *tab;
wl_list_for_each(tab, &server.tabs, link) {
struct kick_window *w;
wl_list_for_each(w, &tab->windows, link)
if (w->toplevel == toplevel)
return w;
}
return NULL;
}
/* The window whose client (by its wl_client) owns the given toplevel
surface, or NULL. Used to attribute a cursor-shape request to the
requesting window so shapes are cached per window and reset on focus
changes. */
static struct kick_window *window_for_client(struct wl_client *client) {
if (!client) return NULL;
struct kick_tab *tab;
wl_list_for_each(tab, &server.tabs, link) {
struct kick_window *w;
wl_list_for_each(w, &tab->windows, link)
if (w->toplevel &&
wl_resource_get_client(w->toplevel->base->surface->resource)
== client)
return w;
}
return NULL;
}
struct kick_popup {
struct wlr_xdg_surface *xdg_surface;
struct wlr_scene_tree *scene;
/* Live-popup registry: every popup kick has created is on this list so
that a later popup can find its parent popup's scene tree by *address
comparison* alone (never dereferencing a possibly-freed pointer). */
struct wl_list link;
struct wl_listener commit;
struct wl_listener destroy;
struct wl_listener reposition;
};
/* Live popups created by kick (see kick_popup.link). Keyed-by-address lookup
only: resolve a popup's parent by comparing the parent wl_surface pointer
against each entry's surface, which never dereferences a stale pointer. */
static struct wl_list live_popups;
/* Lazily sealed (set to true once) right before the first popup is tracked. */
static bool live_popups_ready;
static void live_popups_init(void) {
if (!live_popups_ready) {
wl_list_init(&live_popups);
live_popups_ready = true;
}
}
/* Enough of the host window for popups to be positioned within; open menus
may exceed the toplevel but we keep them inside the visible area. */
static void popup_usable_box(struct wlr_box *box) {
box->x = 0;
box->y = 0;
if (server.output) {
box->width = server.output->width;
box->height = server.output->height;
} else {
box->width = host.width;
box->height = host.height;
}
}
/* Popups (menus, tooltips) are regular wlr_scene_xdg_surface nodes under
their parent's tree, so wlroots' scene renderer composites them into the
output buffer like any other surface. We only need to make sure the client
gets its initial configure (unconstrain from the output box) and to place
each popup under its parent's tree. */
static void popup_handle_commit(struct wl_listener *listener, void *data) {
(void)data;
struct kick_popup *tp = wl_container_of(listener, tp, commit);
struct wlr_xdg_surface *xdg_surface = tp->xdg_surface;
/* The client cannot map/render the popup until it receives its initial
configure, which wlroots only sends via wlr_xdg_popup_unconstrain_from
(which also adjusts geometry within the usable area). initial_commit is
true on the first commit; later commits are ignored. */
if (xdg_surface->initial_commit && xdg_surface->popup) {
struct wlr_box box;
popup_usable_box(&box);
wlr_xdg_popup_unconstrain_from_box(xdg_surface->popup, &box);
}
/* Once the popup maps, report its output-space top-left and size. Tests
key on this line to assert a bar's menu hung flush under the bar; the
coordinates are scene-exact (no wall-clock guesswork). */
if (xdg_surface->surface->mapped && tp->scene) {
int lx = 0, ly = 0;
wlr_scene_node_coords(&tp->scene->node, &lx, &ly);
pid_t pcpid = -1;
if (xdg_surface->client && xdg_surface->client->client)
wl_client_get_credentials(xdg_surface->client->client,
&pcpid, NULL, NULL);
kick_log(KICK_LOG_DEBUG,
"[popup] out=%d,%d geo=%dx%d pcpid=%d\n", lx, ly,
xdg_surface->geometry.width, xdg_surface->geometry.height,
pcpid);
}
}
static void popup_handle_reposition(struct wl_listener *listener, void *data) {
(void)data;
struct kick_popup *tp = wl_container_of(listener, tp, reposition);
if (tp->xdg_surface->popup) {
struct wlr_box box;
popup_usable_box(&box);
wlr_xdg_popup_unconstrain_from_box(tp->xdg_surface->popup, &box);
}
}
static void popup_handle_destroy(struct wl_listener *listener, void *data) {
(void)data;
struct kick_popup *tp = wl_container_of(listener, tp, destroy);
wl_list_remove(&tp->commit.link);
wl_list_remove(&tp->destroy.link);
wl_list_remove(&tp->reposition.link);
wl_list_remove(&tp->link);
/* The popup's xdg_surface outlives this kick_popup (it is freed later by
wlroots' destroy_xdg_surface); clear the data pointer we stashed there
so a later nest-under-this-surface popup never reads freed memory. */
if (tp->xdg_surface)
tp->xdg_surface->data = NULL;
free(tp);
}
static void create_popup(struct wlr_xdg_popup *popup,
struct wlr_scene_tree *parent_tree) {
struct wlr_xdg_surface *xdg_surface = popup->base;
struct kick_popup *tp = calloc(1, sizeof(*tp));
if (!tp) return;
tp->xdg_surface = xdg_surface;
tp->scene = wlr_scene_xdg_surface_create(parent_tree, xdg_surface);
/* wlr_scene_xdg_surface_create destroys the node when the surface is
destroyed, so we only track positioning/reposition listeners here. */
tp->commit.notify = popup_handle_commit;
wl_signal_add(&xdg_surface->surface->events.commit, &tp->commit);
tp->destroy.notify = popup_handle_destroy;
/* Listen on the popup's own destroy: wlroots emits it (then asserts its
event lists are empty) before the popup is freed. */
wl_signal_add(&popup->events.destroy, &tp->destroy);
tp->reposition.notify = popup_handle_reposition;
wl_signal_add(&popup->events.reposition, &tp->reposition);
/* remember the scene tree so a submenu popup can find its parent's tree */
xdg_surface->data = tp;
live_popups_init();
wl_list_insert(live_popups.prev, &tp->link);
}
/* The scene tree a window's popups must hang off: each window's popups ride
on that window's own tree (so they show only while it is the current
window and position within it). */
static struct wlr_scene_tree *popup_tree_for_window(struct kick_window *w) {
return w ? w->tree : NULL;
}
static void handle_new_popup(struct wl_listener *listener, void *data) {
(void)listener;
struct wlr_xdg_popup *popup = data;
/* Popups position themselves relative to their immediate parent surface,
so place each popup under its parent's scene tree.
The parent is ONLY ever located by *address comparison* against kick's
live surfaces -- never by dereferencing popup->parent. wlroots can
hand us a popup whose parent wl_surface was already freed (outside the
xdg teardown cascade), and wlr_xdg_surface_try_from_wlr_surface() then
dereferences that freed pointer and crashes. Comparing the raw address
against live surfaces is safe: a match means the parent is alive and we
use its tree, no match means the parent is gone (or not kick-managed)
and we skip the popup instead of faulting. */
struct wlr_scene_tree *parent_tree = NULL;
struct wlr_surface *parent_ws = popup->parent;
live_popups_init();
struct kick_tab *tab;
wl_list_for_each(tab, &server.tabs, link) {
struct kick_window *w;
wl_list_for_each(w, &tab->windows, link) {
if (w->toplevel &&
w->toplevel->base->surface == parent_ws) {
parent_tree = popup_tree_for_window(w);
goto found;
}
}
}
struct kick_popup *tp;
wl_list_for_each(tp, &live_popups, link) {
if (tp->xdg_surface->surface == parent_ws) {
parent_tree = tp->scene;
goto found;
}
}
found:
/* A popup's parent may be gone or not kick-managed (e.g. it belonged to
a window that closed, or a non-tab surface such as a layer-shell bar).
Rather than drop the popup -- which would leave the client waiting
forever for its initial configure ("Timed out waiting for initial
.configure") -- fall back so the popup still gets rendered and
configured, choosing the mount by which client made it:
* a parentless popup from the active tab's own client still hangs
under that window's (bar-offset) tree, keeping it aligned with the
app's content just as before; and
* a popup from any other client (a layer-shell bar such as
wf-panel-pi, or a gone/foreign surface) maps at the output origin
so its positioner geometry lands on real pixels instead of being
shifted down/right past the bar's reserved edge. */
if (!parent_tree) {
pid_t pcpid = -1;
if (popup->base->client)
wl_client_get_credentials(popup->base->client->client,
&pcpid, NULL, NULL);
struct kick_window *cur = tab_current_window(server.active_tab);
if (cur && cur->client_pid > 0 && cur->client_pid == pcpid) {
kick_log(KICK_LOG_DEBUG,
"[popup] parent %p not live; reusing active window tree "
"for same-client popup\n",
(void *)parent_ws);
parent_tree = popup_tree_for_window(cur);
} else {
kick_log(KICK_LOG_DEBUG,
"[popup] parent %p not live; hanging popup under popup "
"tree at output origin\n",
(void *)parent_ws);
parent_tree = server.popup_tree;
}
}
if (!parent_tree) return;
create_popup(popup, parent_tree);
}
/* ===================== wlr-layer-shell (waybar / panels) =================
Layer-shell surfaces are never tabs: each renders into server.layer_tree, a
dedicated child of server.scene->tree that sits above every window tree and
is never toggled by show_window()/set_active_tab(), so a bar stays visible
across all tabs. Only a layer surface's own exclusive_zone shrinks the
usable area the maximized tabs are sized into (delegated to wlroots' scene
helper), mirroring sway and labwc: a transient zero-exclusive-zone surface
(e.g. a panel notification) is positioned but never resizes the tabs.
wlroots' own scene helper (wlr_scene_layer_surface_v1_*) does the heavy
lifting for us: it computes the surface's anchored/centered geometry from
its pending state and, for mapped surfaces with a positive exclusive zone,
shrinks a caller-supplied usable area for the next layer surface. We drive
that in two passes -- exclusive-zone surfaces first (highest layer first)
so they always get preferred placement regardless of launch order, then the
zero-exclusive-zone remainder within the residue (lowest layer first) --
and size every maximized tab to the residual usable box. */
struct kick_layer {
struct wl_list link;
struct wlr_layer_surface_v1 *surface;
struct wlr_scene_layer_surface_v1 *scene;
struct wl_listener commit;
struct wl_listener destroy;
bool mapped;
/* Whether the surface's first commit (which sets wlroots' initialized
flag) has been seen; guards the first configure. */
bool seen_init;
};
/* The full output box, used as the starting full_area for the layer layout
pass and the "which area may tabs ever grow into" bounds. */
static void layer_full_area(struct wlr_box *box) {
box->x = 0;
box->y = 0;
if (server.output) {
box->width = server.output->width;
box->height = server.output->height;
} else {
box->width = host.width;
box->height = host.height;
}
}
/* Abort any max/fullscreen state and re-size the maximized clients into the
given usable box, mirroring output_resize's loop. Skipped when a client
is fullscreen: the fullscreen configure already sizes it to the output and
forcing a size here would fight it. */
static void resize_tabs_to_usable(const struct wlr_box *usable) {
struct kick_tab *tab;
wl_list_for_each(tab, &server.tabs, link) {
struct kick_window *w;
wl_list_for_each(w, &tab->windows, link) {
if (!window_live(w)) continue;
if (!server.clients_fullscreen)
window_set_maximized(w, true);
window_set_size(w, usable->width, usable->height);
/* Move the tab content down/right past a bar's reserved edge now,
not only on the client's next commit. These are idempotent:
position_window does nothing for X11 windows and
x11_sync_position does nothing for XDG windows. */
position_window(w);
x11_sync_position(w);
}
}
}
/* Keep the bar's scene tree above every window tree. layer_tree is created
at scene setup before any windows attach (so they'd otherwise stack on top),
and each new window subtree is appended above any siblings -- so after every
window claim we re-raise the layer tree to stay on top. */
static void layer_raise_above_windows(void) {
if (server.layer_tree)
wlr_scene_node_raise_to_top(&server.layer_tree->node);
if (server.popup_tree)
wlr_scene_node_raise_to_top(&server.popup_tree->node);
if (server.input_popup_tree)
wlr_scene_node_raise_to_top(&server.input_popup_tree->node);
}
/* Layer orders for the two configure passes, mirroring labwc's
layers_arrange(): exclusive-zone surfaces run from the highest layer down
so they always get preferred placement, the zero-exclusive-zone remainder
runs from the lowest layer up inside the residue. */
static const enum zwlr_layer_shell_v1_layer layer_order_exclusive[] = {
ZWLR_LAYER_SHELL_V1_LAYER_OVERLAY,
ZWLR_LAYER_SHELL_V1_LAYER_TOP,
ZWLR_LAYER_SHELL_V1_LAYER_BOTTOM,
ZWLR_LAYER_SHELL_V1_LAYER_BACKGROUND,
};
static const enum zwlr_layer_shell_v1_layer layer_order_rest[] = {
ZWLR_LAYER_SHELL_V1_LAYER_BACKGROUND,
ZWLR_LAYER_SHELL_V1_LAYER_BOTTOM,
ZWLR_LAYER_SHELL_V1_LAYER_TOP,
ZWLR_LAYER_SHELL_V1_LAYER_OVERLAY,
};
/* Configure every layer surface on `want` whose exclusive-zone class matches:
exclusive=true means a non-zero exclusive_zone (including -1, the full-area
request), exclusive=false the zero-exclusive-zone remainder. wlroots' scene
helper shrinks the shared usable box inside the call for mapped surfaces
with a positive exclusive zone, and positions everything else within the
current residue without shrinking it. */
static void layer_configure_class(enum zwlr_layer_shell_v1_layer want,
bool exclusive, const struct wlr_box *full,
struct wlr_box *usable) {
struct kick_layer *sl;
wl_list_for_each(sl, &server.layer_surfaces, link) {
if (!sl->scene || !sl->seen_init) continue;
if (sl->surface->current.layer != want) continue;
if (!!sl->surface->current.exclusive_zone != exclusive) continue;
wlr_scene_layer_surface_v1_configure(sl->scene, full, usable);
}
}
/* Run the layer layout pass: configure every layer surface against the given
full area -- exclusive-zone surfaces first so they reserve, then the
zero-exclusive-zone remainder within the residue -- and size all maximized
tabs into the final usable box. */
static void layer_apply_layout_box(const struct wlr_box *full) {
struct wlr_box usable = *full;
for (size_t i = 0;
i < sizeof(layer_order_exclusive) / sizeof(layer_order_exclusive[0]);
i++)
layer_configure_class(layer_order_exclusive[i], true, full, &usable);
for (size_t i = 0;
i < sizeof(layer_order_rest) / sizeof(layer_order_rest[0]); i++)
layer_configure_class(layer_order_rest[i], false, full, &usable);
server.layout_x = usable.x;
server.layout_y = usable.y;
resize_tabs_to_usable(&usable);
kick_request_redraw();
}
/* Layout pass for the current (already-applied) output size. */
static void layer_apply_layout(void) {
struct wlr_box full;
layer_full_area(&full);
layer_apply_layout_box(&full);
}
static void layer_destroy(struct kick_layer *sl) {
wl_list_remove(&sl->link);
/* The surface's own destroy path (which raised this listener) is what
frees the wlr_layer_surface_v1 and, via wlroots' scene helper, the
scene node; here we only drop our bookkeeping. */
free(sl);
}
static void layer_handle_commit(struct wl_listener *listener, void *data) {
(void)data;
struct kick_layer *sl = wl_container_of(listener, sl, commit);
bool mapped = sl->surface->surface->mapped;
/* Deterministic "the bar is on screen" signal for tests: fires on the
commit that maps a layer surface, including a first-commit map. */
if (mapped && !sl->mapped) {
pid_t pid = -1;
if (sl->surface->resource)
wl_client_get_credentials(
wl_resource_get_client(sl->surface->resource),
&pid, NULL, NULL);
kick_log(KICK_LOG_DEBUG, "[layer] map pid=%d\n", pid);
}
if (!sl->seen_init) {
/* First commit. wlroots' layer_surface_role_commit runs first and
sets surface->initialized, so this is the earliest point we may call
wlr_layer_surface_v1_configure (which asserts initialized). Deliver
the first geometry even though the surface isn't mapped yet. */
sl->seen_init = true;
sl->mapped = mapped;
layer_apply_layout();
} else if (mapped != sl->mapped) {
sl->mapped = mapped;
/* exclusive-zone reservation applies only once the surface is mapped
(wlr_scene_layer_surface_v1_configure checks surface->mapped), so
the bar's map is what actually shrinks the tabs. */
layer_apply_layout();
} else if (mapped) {
/* Already mapped: the commit may have changed size/anchor/exclusive
zone/desired size, so re-run layout to keep the bar and tabs in
step. */
layer_apply_layout();
}
}
static void layer_handle_destroy(struct wl_listener *listener, void *data) {
(void)data;
struct kick_layer *sl = wl_container_of(listener, sl, destroy);
/* Drop both listeners we registered before releasing bookkeeping: the
destroy listener (safe to remove here, inside its own emit) and the
commit listener on the wl_surface, which the layer-surface destroy
path does not touch and would otherwise fire on freed memory once a
late commit arrives during teardown. */
wl_list_remove(&sl->commit.link);
wl_list_remove(&sl->destroy.link);
layer_destroy(sl);
layer_apply_layout();
}
static void handle_new_layer_surface(struct wl_listener *listener, void *data) {
(void)listener;
struct wlr_layer_surface_v1 *layer_surface = data;
/* The protocol lets the client bind a layer surface without naming an
output; kick has exactly one output, so always anchor to it. */
if (layer_surface->output == NULL && server.output)
layer_surface->output = server.output;
struct kick_layer *sl = calloc(1, sizeof(*sl));
if (!sl) {
wlr_layer_surface_v1_destroy(layer_surface);
return;
}
sl->surface = layer_surface;
sl->scene = wlr_scene_layer_surface_v1_create(server.layer_tree,
layer_surface);
layer_raise_above_windows();
wl_list_insert(server.layer_surfaces.prev, &sl->link);
sl->commit.notify = layer_handle_commit;
wl_signal_add(&layer_surface->surface->events.commit, &sl->commit);
sl->destroy.notify = layer_handle_destroy;
wl_signal_add(&layer_surface->events.destroy, &sl->destroy);
}
/* Fork the --panel command (only ever one, hence no slot bookkeeping like
tabs need). Runs in its own process group but is never claimed by
handle_new_toplevel: a layer-shell client never creates a toplevel. */
static void launch_panel(void) {
if (!server.panel_cmd) return;
pid_t pid = fork();
if (pid == 0) {
setpgid(0, 0);
const char *xdg_runtime = getenv("XDG_RUNTIME_DIR");
if (!xdg_runtime) xdg_runtime = "/tmp";
setenv("WAYLAND_DISPLAY", kick_socket, 1);
setenv("XDG_RUNTIME_DIR", xdg_runtime, 1);
unsetenv("DISPLAY");
/* A panel is a background process; its [info]/[warning] chatter must
not spill onto the launching terminal. As with CLI clients, only
debug logging keeps the bar's own output visible. */
if (kick_log_level() < KICK_LOG_DEBUG) {
int nullfd = open("/dev/null", O_WRONLY);
if (nullfd >= 0) {
dup2(nullfd, STDOUT_FILENO);
dup2(nullfd, STDERR_FILENO);
if (nullfd > STDERR_FILENO) close(nullfd);
}
}
execlp("/bin/sh", "sh", "-c", server.panel_cmd, NULL);
_exit(127);
}
if (pid > 0) {
server.panel_pid = pid;
kick_log(KICK_LOG_INFO, "[panel] pid=%d cmd=%s\n", pid, server.panel_cmd);
}
}
/* Apply a cursor-shape-v1 shape value end to end: in standalone mode set the
composited cursor image from the theme; in nested mode forward the shape to
the host pointer so the host draws the right cursor over our window. */
static void apply_cursor_shape(int shape) {
if (shape == 0 || shape == server.cursor_shape)
return;
server.cursor_shape = shape;
const char *name = wlr_cursor_shape_v1_name(
(enum wp_cursor_shape_device_v1_shape)shape);
if (server.standalone) {
if (server.cursor && server.xcursor_mgr)
wlr_cursor_set_xcursor(server.cursor, server.xcursor_mgr, name);
kick_log(KICK_LOG_DEBUG, "[cursor] shape %s\n", name);
} else {
host_cursor_shape_set(shape);
}
}
/* A nested client switched its cursor shape via cursor-shape-v1. Cache the
shape on the requesting window (so switching windows resets to that
window's own last shape, or default) and apply it. */
static void handle_shape_set(struct wl_listener *listener, void *data) {
(void)listener;
struct wlr_cursor_shape_manager_v1_request_set_shape_event *ev = data;
if (ev->device_type != WLR_CURSOR_SHAPE_MANAGER_V1_DEVICE_TYPE_POINTER)
return;
struct kick_window *w = window_for_client(ev->seat_client->client);
if (w)
w->cursor_shape = ev->shape;
apply_cursor_shape(ev->shape);
}
/* Switch to the next live tab in `dir` direction (Alt+Down: +1), wrapping
around the end of the tab list, skipping tabs that are mid-close. With
only the current tab live, does nothing. */
static void cycle_tab(int dir) {
if (wl_list_empty(&server.tabs)) return;
struct kick_tab *cur = server.active_tab;
struct kick_tab *t;
if (dir > 0) {
/* First pass: tabs after the current one; second: the ones before
it (so the ring wraps exactly once). With no current tab the
first pass alone covers the whole list. */
bool past = (cur == NULL);
wl_list_for_each(t, &server.tabs, link) {
if (t == cur) { past = true; continue; }
if (past && tab_live(t) && !tab_closing(t)) {
set_active_tab(t);
return;
}
}
wl_list_for_each(t, &server.tabs, link) {
if (t == cur) break;
if (tab_live(t) && !tab_closing(t)) {
set_active_tab(t);
return;
}
}
} else {
bool past = (cur == NULL);
wl_list_for_each_reverse(t, &server.tabs, link) {
if (t == cur) { past = true; continue; }
if (past && tab_live(t) && !tab_closing(t)) {
set_active_tab(t);
return;
}
}
wl_list_for_each_reverse(t, &server.tabs, link) {
if (t == cur) break;
if (tab_live(t) && !tab_closing(t)) {
set_active_tab(t);
return;
}
}
}
}
/* Move the active tab one position up (dir>0: later in the list) or down
(dir<0) within the tab order, wrapping at the ends. The active
surface is unchanged; only the tab's position in the list moves, which
the overlay and cycling both iterate. Only live tabs (mapped or pending
black, mirroring cycle_tab) that aren't mid-close count as positions;
with fewer than two of them there is nowhere to move. */
static void reorder_active_tab(int dir) {
if (wl_list_empty(&server.tabs)) return;
struct kick_tab *cur = server.active_tab;
if (!cur) return;
/* Collect the live, non-closing tabs as an indexable list. */
struct kick_tab *tabs[256];
int n = 0;
struct kick_tab *t;
wl_list_for_each(t, &server.tabs, link)
if (n < 256 && tab_live(t) && !tab_closing(t))
tabs[n++] = t;
if (n < 2) return;
int from = -1;
for (int i = 0; i < n; i++)
if (tabs[i] == cur) {
from = i;
break;
}
if (from < 0) return;
int to = (from + dir + n) % n;
if (to == from) return;
wl_list_remove(&cur->link);
/* wl_list_insert() inserts after its anchor. Moving down (to > from) the
moved tab lands directly ahead of the tab that was at `to`, so it must
be spliced in AFTER tabs[to]; moving up (to < from) it lands directly
behind tabs[to - 1]. Anchoring on tabs[to - 1] for a rightward move
resolves to cur itself (already removed) and splices it out of the
list entirely. */
if (to == 0)
wl_list_insert(&server.tabs, &cur->link);
else if (to > from)
wl_list_insert(&tabs[to]->link, &cur->link);
else
wl_list_insert(&tabs[to - 1]->link, &cur->link);
kick_log(KICK_LOG_INFO, "[reorder] app=%d dir=%d\n", to, dir);
kick_request_redraw();
if (server.standalone)
standalone_overlay_damage();
}
/* Fixed keybind repeat: first repeat after 600ms, then every 40ms (25Hz). */
#define KICK_REPEAT_DELAY_MS 600
#define KICK_REPEAT_INTERVAL_MS 40
static void kbd_repeat_cancel(void) {
if (host.repeat_timer) {
wl_event_source_remove(host.repeat_timer);
host.repeat_timer = NULL;
}
host.repeat_key = 0;
}
static int kbd_repeat_cb(void *data) {
(void)data;
if (host.repeat_key == 0)
return 0;
if (host.repeat_kind == REPEAT_REORDER)
reorder_active_tab(host.repeat_dir);
else if (host.repeat_kind == REPEAT_SUBCYCLE)
cycle_tab_windows(server.active_tab, host.repeat_dir);
else if (host.repeat_kind == REPEAT_MEMBER_MOVE) {
struct kick_window *w = tab_current_window(server.active_tab);
if (w)
reorder_window(w, host.repeat_dir);
} else
cycle_tab(host.repeat_dir);
if (host.repeat_timer)
wl_event_source_timer_update(host.repeat_timer,
KICK_REPEAT_INTERVAL_MS);
return 0;
}
static void kbd_repeat_start(int key, int dir, int kind) {
kbd_repeat_cancel();
host.repeat_key = key;
host.repeat_dir = dir;
host.repeat_kind = kind;
host.repeat_timer = wl_event_loop_add_timer(server.loop, kbd_repeat_cb, NULL);
if (host.repeat_timer)
wl_event_source_timer_update(host.repeat_timer, KICK_REPEAT_DELAY_MS);
}
/* ===================== Clipboard bridge implementation ===================== */
static void bridge_mimes_reset(void) {
for (size_t i = 0; i < bridge.mimes_len; i++)
free(bridge.mimes[i]);
bridge.mimes_len = 0;
}
static void bridge_mimes_append(const char *mime) {
if (bridge.mimes_len == bridge.mimes_cap) {
size_t ncap = bridge.mimes_cap ? bridge.mimes_cap * 2 : 8;
char **nm = realloc(bridge.mimes, ncap * sizeof(*nm));
if (!nm)
return;
bridge.mimes = nm;
bridge.mimes_cap = ncap;
}
bridge.mimes[bridge.mimes_len++] = strdup(mime);
}
static double bridge_dbg_ms(void);
static void bridge_inner_src_destroy(struct wl_listener *l, void *data);
static bool bridge_prefetch_mime_compatible(const char *mime);
static void bridge_prefetch_serve(const char *mime, int32_t fd);
static bool bridge_primary_prefetch_mime_compatible(const char *mime);
static void bridge_primary_prefetch_serve(const char *mime, int32_t fd);
/* Compositor-side nested source: when a nested client pastes, wlroots calls
our impl->send() and we pull the data from the host offer straight into the
fd wlroots gave us (zero copy, no relay). */
static void bridge_inner_source_send(struct wlr_data_source *src,
const char *mime, int32_t fd) {
(void)src;
kick_log(KICK_LOG_DEBUG, "[dbg-src] t=%.0f inner_send mime=%s inner_src=%p "
"prefetch_ready=%d dc_offer=%p dd_offer=%p\n", bridge_dbg_ms(),
mime, (void *)bridge.inner_src, bridge.prefetch_ready,
(void *)bridge.dc_offer, (void *)bridge.dd_offer);
if (bridge_prefetch_mime_compatible(mime)) {
bridge_prefetch_serve(mime, fd);
return;
}
if (bridge.backend == BRIDGE_BACKEND_DATA_CONTROL && bridge.dc_offer) {
zwlr_data_control_offer_v1_receive(bridge.dc_offer, mime, fd);
close(fd);
} else if (bridge.backend == BRIDGE_BACKEND_WL_DATA_DEVICE &&
bridge.dd_offer) {
wl_data_offer_receive(bridge.dd_offer, mime, fd);
close(fd);
} else {
close(fd);
}
}
static void bridge_inner_source_destroy(struct wlr_data_source *src) {
free(src);
}
static const struct wlr_data_source_impl bridge_inner_source_impl = {
.send = bridge_inner_source_send,
.destroy = bridge_inner_source_destroy,
};
static void bridge_set_inner_src(struct wlr_data_source *src) {
if (bridge.inner_src == src)
return;
if (bridge.inner_src) {
wl_list_remove(&bridge.inner_src_destroy.link);
bridge.inner_src = NULL;
}
bridge.inner_src = src;
if (src) {
bridge.inner_src_destroy.notify = bridge_inner_src_destroy;
wl_signal_add(&src->events.destroy, &bridge.inner_src_destroy);
}
}
static void bridge_inner_src_destroy(struct wl_listener *l, void *data) {
(void)data;
kick_log(KICK_LOG_DEBUG, "[dbg-bridge] t=%.0f inner_src destroyed\n",
bridge_dbg_ms());
wl_list_remove(&l->link);
bridge.inner_src = NULL;
}
/* Put a host selection into the nested seat. The source stays valid for the
whole lifetime of the host offer, so pastes can be served asynchronously. */
static void bridge_mirror_to_nested(void) {
struct wlr_data_source *src = calloc(1, sizeof(*src));
if (!src) {
bridge_mimes_reset();
return;
}
wlr_data_source_init(src, &bridge_inner_source_impl);
for (size_t i = 0; i < bridge.mimes_len; i++) {
char **p = wl_array_add(&src->mime_types, sizeof(char *));
if (!p) {
for (size_t j = i; j < bridge.mimes_len; j++)
free(bridge.mimes[j]);
bridge.mimes_len = 0;
break;
}
*p = bridge.mimes[i];
bridge.mimes[i] = NULL; /* ownership moves into the wl_array */
}
bridge.mimes_len = 0;
bridge_set_inner_src(src);
wlr_seat_set_selection(server.seat, src,
wl_display_next_serial(server.wl_display));
}
static void bridge_clear_nested(void) {
if (!server.seat->selection_source)
return;
bridge.ignore_next_inner = true;
wlr_seat_set_selection(server.seat, NULL,
wl_display_next_serial(server.wl_display));
}
/* ---------------- primary selection mirror (host <-> nested seat) -------- */
/* The nested primary-selection source we install when a host offer is
mirrored in. A nested client asking for the data has the request pulled
straight from the host offer over the data-control pipe. */
static void bridge_inner_primary_source_send(struct wlr_primary_selection_source *src,
const char *mime, int32_t fd) {
(void)src;
if (bridge_primary_prefetch_mime_compatible(mime)) {
bridge_primary_prefetch_serve(mime, fd);
return;
}
if (bridge.backend == BRIDGE_BACKEND_DATA_CONTROL && bridge.dc_primary_offer) {
zwlr_data_control_offer_v1_receive(bridge.dc_primary_offer, mime, fd);
close(fd);
} else {
close(fd);
}
}
static void bridge_inner_primary_source_destroy(struct wlr_primary_selection_source *src) {
free(src);
}
static const struct wlr_primary_selection_source_impl bridge_inner_primary_source_impl = {
.send = bridge_inner_primary_source_send,
.destroy = bridge_inner_primary_source_destroy,
};
static void bridge_inner_primary_src_destroy(struct wl_listener *l, void *data) {
(void)data;
wl_list_remove(&l->link);
bridge.inner_primary_src = NULL;
}
static void bridge_set_inner_primary_src(struct wlr_primary_selection_source *src) {
if (bridge.inner_primary_src == src)
return;
if (bridge.inner_primary_src) {
wl_list_remove(&bridge.inner_primary_src_destroy.link);
bridge.inner_primary_src = NULL;
}
bridge.inner_primary_src = src;
if (src) {
bridge.inner_primary_src_destroy.notify = bridge_inner_primary_src_destroy;
wl_signal_add(&src->events.destroy, &bridge.inner_primary_src_destroy);
}
}
/* Put the collected host primary offer (bridge.mimes) into the nested seat. */
static void bridge_mirror_primary_to_nested(void) {
kick_log(KICK_LOG_DEBUG, "[bridge] mirror host primary into nested "
"(mimes=%zu)\n", bridge.mimes_len);
struct wlr_primary_selection_source *src = calloc(1, sizeof(*src));
if (!src) {
bridge_mimes_reset();
return;
}
wlr_primary_selection_source_init(src, &bridge_inner_primary_source_impl);
for (size_t i = 0; i < bridge.mimes_len; i++) {
char **p = wl_array_add(&src->mime_types, sizeof(char *));
if (!p) {
for (size_t j = i; j < bridge.mimes_len; j++)
free(bridge.mimes[j]);
bridge.mimes_len = 0;
break;
}
*p = bridge.mimes[i];
bridge.mimes[i] = NULL; /* ownership moves into the wl_array */
}
bridge.mimes_len = 0;
wlr_seat_set_primary_selection(server.seat, src,
wl_display_next_serial(server.wl_display));
}
static void bridge_primary_clear_nested(void) {
if (!server.seat->primary_selection_source)
return;
kick_log(KICK_LOG_DEBUG, "[bridge] clear nested primary\n");
bridge.primary_ignore_next_inner = true;
wlr_seat_set_primary_selection(server.seat, NULL,
wl_display_next_serial(server.wl_display));
}
/* ---------------- text prefetch: serve pastes from a buffered copy -------- */
#define KICK_PREFETCH_MAX (16 * 1024 * 1024)
static void bridge_prefetch_cancel(void) {
if (bridge.prefetch_src) {
wl_event_source_remove(bridge.prefetch_src);
bridge.prefetch_src = NULL;
}
if (bridge.prefetch_fd >= 0) {
close(bridge.prefetch_fd);
bridge.prefetch_fd = -1;
}
free(bridge.prefetch_buf);
bridge.prefetch_buf = NULL;
bridge.prefetch_len = bridge.prefetch_cap = 0;
bridge.prefetch_mime[0] = '\0';
bridge.prefetch_ready = false;
}
/* Drain the prefetch pipe into the buffer. Returns true when the stream is
finished (EOF/error) and the buffer should be kept as the paste payload. */
static bool bridge_prefetch_drain(int fd) {
for (;;) {
size_t room = bridge.prefetch_cap - bridge.prefetch_len;
if (bridge.prefetch_len + 4096 > bridge.prefetch_cap &&
bridge.prefetch_cap < KICK_PREFETCH_MAX) {
size_t ncap = bridge.prefetch_cap ? bridge.prefetch_cap * 2 : 8192;
if (ncap > KICK_PREFETCH_MAX)
ncap = KICK_PREFETCH_MAX;
char *nb = realloc(bridge.prefetch_buf, ncap);
if (nb) {
bridge.prefetch_buf = nb;
bridge.prefetch_cap = ncap;
room = bridge.prefetch_cap - bridge.prefetch_len;
}
}
if (room == 0) {
/* cap reached: drain without storing to keep the writer unblocked */
char tmp;
ssize_t n = read(fd, &tmp, 1);
if (n > 0)
continue;
if (n == 0)
return true;
if (errno == EINTR)
continue;
if (errno == EAGAIN)
return false;
return true;
}
ssize_t n = read(fd, bridge.prefetch_buf + bridge.prefetch_len, room);
if (n > 0) {
bridge.prefetch_len += (size_t)n;
continue;
}
if (n == 0)
return true; /* EOF */
if (errno == EINTR)
continue;
if (errno == EAGAIN)
return false; /* more data pending */
return true; /* read error: keep whatever we got */
}
}
static int bridge_prefetch_cb(int fd, uint32_t mask, void *data) {
(void)data; (void)mask;
if (!bridge_prefetch_drain(fd))
return 0;
if (bridge.prefetch_src) {
wl_event_source_remove(bridge.prefetch_src);
bridge.prefetch_src = NULL;
}
close(fd);
bridge.prefetch_fd = -1;
bridge.prefetch_ready = true;
return 0;
}
/* Pick the best text MIME offered for prefetching. */
static const char *bridge_pick_text_mime(void) {
static const char *pref[] = {
"text/plain;charset=utf-8", "text/plain", "UTF8_STRING", NULL,
};
for (int i = 0; pref[i]; i++)
for (size_t j = 0; j < bridge.mimes_len; j++)
if (strcmp(bridge.mimes[j], pref[i]) == 0)
return bridge.mimes[j];
for (size_t j = 0; j < bridge.mimes_len; j++)
if (strncmp(bridge.mimes[j], "text/", 5) == 0)
return bridge.mimes[j];
return NULL;
}
/* Start pulling the current host offer's primary text MIME into our buffer.
Must be called while bridge.mimes holds the freshly collected list. */
static void bridge_prefetch_start(void) {
bridge_prefetch_cancel();
if (!bridge.mimes_len)
return;
const char *mime = bridge_pick_text_mime();
if (!mime)
return;
int p[2];
if (pipe2(p, O_CLOEXEC | O_NONBLOCK) != 0)
return;
bridge.prefetch_fd = p[0];
bridge.prefetch_src = wl_event_loop_add_fd(server.loop, p[0],
WL_EVENT_READABLE, bridge_prefetch_cb, NULL);
if (!bridge.prefetch_src) {
close(p[0]);
close(p[1]);
bridge.prefetch_fd = -1;
return;
}
snprintf(bridge.prefetch_mime, sizeof(bridge.prefetch_mime), "%s", mime);
if (bridge.backend == BRIDGE_BACKEND_DATA_CONTROL && bridge.dc_offer) {
zwlr_data_control_offer_v1_receive(bridge.dc_offer, mime, p[1]);
close(p[1]);
} else if (bridge.backend == BRIDGE_BACKEND_WL_DATA_DEVICE &&
bridge.dd_offer) {
wl_data_offer_receive(bridge.dd_offer, mime, p[1]);
close(p[1]);
} else {
bridge_prefetch_cancel();
}
}
/* The requested MIME can be served from the prefetched plain-text buffer. */
static bool bridge_prefetch_mime_compatible(const char *mime) {
if (!bridge.prefetch_ready || bridge.prefetch_mime[0] == '\0')
return false;
if (strcmp(mime, bridge.prefetch_mime) == 0)
return true;
bool a = strncmp(mime, "text/plain", 10) == 0 ||
strcmp(mime, "UTF8_STRING") == 0;
bool b = strncmp(bridge.prefetch_mime, "text/plain", 10) == 0 ||
strcmp(bridge.prefetch_mime, "UTF8_STRING") == 0;
return a && b;
}
static void bridge_prefetch_serve(const char *mime, int32_t fd) {
if (!bridge_prefetch_mime_compatible(mime)) {
close(fd);
return;
}
size_t off = 0;
while (off < bridge.prefetch_len) {
ssize_t n = write(fd, bridge.prefetch_buf + off,
bridge.prefetch_len - off);
if (n > 0) {
off += (size_t)n;
} else if (n < 0 && (errno == EAGAIN || errno == EINTR)) {
continue;
} else {
break;
}
}
close(fd);
}
/* ---------------- primary-selection text prefetch ----------------------- */
#define KICK_PRIMARY_PREFETCH_MAX KICK_PREFETCH_MAX
static void bridge_primary_prefetch_cancel(void) {
if (bridge.primary_prefetch_src) {
wl_event_source_remove(bridge.primary_prefetch_src);
bridge.primary_prefetch_src = NULL;
}
if (bridge.primary_prefetch_fd >= 0) {
close(bridge.primary_prefetch_fd);
bridge.primary_prefetch_fd = -1;
}
free(bridge.primary_prefetch_buf);
bridge.primary_prefetch_buf = NULL;
bridge.primary_prefetch_len = bridge.primary_prefetch_cap = 0;
bridge.primary_prefetch_mime[0] = '\0';
bridge.primary_prefetch_ready = false;
}
static bool bridge_primary_prefetch_drain(int fd) {
for (;;) {
size_t room = bridge.primary_prefetch_cap - bridge.primary_prefetch_len;
if (bridge.primary_prefetch_len + 4096 > bridge.primary_prefetch_cap &&
bridge.primary_prefetch_cap < KICK_PRIMARY_PREFETCH_MAX) {
size_t ncap = bridge.primary_prefetch_cap
? bridge.primary_prefetch_cap * 2 : 8192;
if (ncap > KICK_PRIMARY_PREFETCH_MAX)
ncap = KICK_PRIMARY_PREFETCH_MAX;
char *nb = realloc(bridge.primary_prefetch_buf, ncap);
if (nb) {
bridge.primary_prefetch_buf = nb;
bridge.primary_prefetch_cap = ncap;
room = bridge.primary_prefetch_cap - bridge.primary_prefetch_len;
}
}
if (room == 0) {
char tmp;
ssize_t n = read(fd, &tmp, 1);
if (n > 0)
continue;
if (n == 0)
return true;
if (errno == EINTR)
continue;
if (errno == EAGAIN)
return false;
return true;
}
ssize_t n = read(fd, bridge.primary_prefetch_buf + bridge.primary_prefetch_len,
room);
if (n > 0) {
bridge.primary_prefetch_len += (size_t)n;
continue;
}
if (n == 0)
return true;
if (errno == EINTR)
continue;
if (errno == EAGAIN)
return false;
return true;
}
}
static int bridge_primary_prefetch_cb(int fd, uint32_t mask, void *data) {
(void)data; (void)mask;
if (!bridge_primary_prefetch_drain(fd))
return 0;
if (bridge.primary_prefetch_src) {
wl_event_source_remove(bridge.primary_prefetch_src);
bridge.primary_prefetch_src = NULL;
}
close(fd);
bridge.primary_prefetch_fd = -1;
bridge.primary_prefetch_ready = true;
return 0;
}
/* Start pulling the current host primary offer's text MIME into our buffer.
Must be called while bridge.mimes holds the freshly collected list. */
static void bridge_primary_prefetch_start(void) {
bridge_primary_prefetch_cancel();
if (bridge.backend != BRIDGE_BACKEND_DATA_CONTROL || !bridge.dc_primary_offer)
return;
if (!bridge.mimes_len)
return;
const char *mime = bridge_pick_text_mime();
if (!mime)
return;
int p[2];
if (pipe2(p, O_CLOEXEC | O_NONBLOCK) != 0)
return;
bridge.primary_prefetch_fd = p[0];
bridge.primary_prefetch_src = wl_event_loop_add_fd(server.loop, p[0],
WL_EVENT_READABLE, bridge_primary_prefetch_cb, NULL);
if (!bridge.primary_prefetch_src) {
close(p[0]);
close(p[1]);
bridge.primary_prefetch_fd = -1;
return;
}
snprintf(bridge.primary_prefetch_mime, sizeof(bridge.primary_prefetch_mime),
"%s", mime);
zwlr_data_control_offer_v1_receive(bridge.dc_primary_offer, mime, p[1]);
close(p[1]);
}
/* The requested MIME can be served from the prefetched primary-text buffer. */
static bool bridge_primary_prefetch_mime_compatible(const char *mime) {
if (!bridge.primary_prefetch_ready || bridge.primary_prefetch_mime[0] == '\0')
return false;
if (strcmp(mime, bridge.primary_prefetch_mime) == 0)
return true;
bool a = strncmp(mime, "text/plain", 10) == 0 ||
strcmp(mime, "UTF8_STRING") == 0;
bool b = strncmp(bridge.primary_prefetch_mime, "text/plain", 10) == 0 ||
strcmp(bridge.primary_prefetch_mime, "UTF8_STRING") == 0;
return a && b;
}
static void bridge_primary_prefetch_serve(const char *mime, int32_t fd) {
if (!bridge_primary_prefetch_mime_compatible(mime)) {
close(fd);
return;
}
size_t off = 0;
while (off < bridge.primary_prefetch_len) {
ssize_t n = write(fd, bridge.primary_prefetch_buf + off,
bridge.primary_prefetch_len - off);
if (n > 0) {
off += (size_t)n;
} else if (n < 0 && (errno == EAGAIN || errno == EINTR)) {
continue;
} else {
break;
}
}
close(fd);
}
/* ---------------- host backend: wlr-data-control ---------------- */
static void bridge_dc_source_send(void *data,
struct zwlr_data_control_source_v1 *src, const char *mime, int32_t fd) {
(void)data; (void)src;
kick_log(KICK_LOG_DEBUG, "[dbg-host] t=%.0f dc_source_send mime=%s "
"fd=%d inner_src=%p\n", bridge_dbg_ms(), mime, fd,
(void *)bridge.inner_src);
if (bridge.inner_src) {
wlr_data_source_send(bridge.inner_src, mime, fd);
kick_log(KICK_LOG_DEBUG, "[dbg-host] t=%.0f dc_source_send "
"forwarded mime=%s fd=%d\n", bridge_dbg_ms(), mime, fd);
} else
close(fd);
}
static void bridge_dc_source_cancelled(void *data,
struct zwlr_data_control_source_v1 *src) {
(void)data;
zwlr_data_control_source_v1_destroy(src);
bridge.dc_source = NULL;
bridge.dc_pending_echo = false;
bridge.dd_pending_echo = false;
}
static const struct zwlr_data_control_source_v1_listener bridge_dc_source_listener = {
.send = bridge_dc_source_send,
.cancelled = bridge_dc_source_cancelled,
};
/* Our published host primary-selection source: host middle-click requests
are served by asking the originating nested client for the data. */
static void bridge_dc_primary_source_send(void *data,
struct zwlr_data_control_source_v1 *src, const char *mime, int32_t fd) {
(void)data; (void)src;
if (bridge.inner_primary_src)
wlr_primary_selection_source_send(bridge.inner_primary_src, mime, fd);
else
close(fd);
}
static void bridge_dc_primary_source_cancelled(void *data,
struct zwlr_data_control_source_v1 *src) {
(void)data;
zwlr_data_control_source_v1_destroy(src);
bridge.dc_primary_source = NULL;
bridge.dc_primary_pending_echo = false;
}
static const struct zwlr_data_control_source_v1_listener bridge_dc_primary_source_listener = {
.send = bridge_dc_primary_source_send,
.cancelled = bridge_dc_primary_source_cancelled,
};
static void bridge_dc_offer_mime(void *data,
struct zwlr_data_control_offer_v1 *offer, const char *mime) {
(void)data; (void)offer;
bridge_mimes_append(mime);
}
static const struct zwlr_data_control_offer_v1_listener bridge_dc_offer_listener = {
.offer = bridge_dc_offer_mime,
};
static void bridge_dc_device_finished(void *data,
struct zwlr_data_control_device_v1 *dev) {
(void)data; (void)dev;
bridge.backend = bridge.dd ? BRIDGE_BACKEND_WL_DATA_DEVICE
: BRIDGE_BACKEND_NONE;
if (bridge.dc_offer) {
zwlr_data_control_offer_v1_destroy(bridge.dc_offer);
bridge.dc_offer = NULL;
}
if (bridge.dc_primary_offer) {
zwlr_data_control_offer_v1_destroy(bridge.dc_primary_offer);
bridge.dc_primary_offer = NULL;
}
if (bridge.dc_primary_echo_offer) {
zwlr_data_control_offer_v1_destroy(bridge.dc_primary_echo_offer);
bridge.dc_primary_echo_offer = NULL;
}
if (bridge.dc_primary_source) {
zwlr_data_control_source_v1_destroy(bridge.dc_primary_source);
bridge.dc_primary_source = NULL;
}
bridge.dc_primary_pending_echo = false;
bridge_primary_prefetch_cancel();
if (bridge.dc_device) {
zwlr_data_control_device_v1_destroy(bridge.dc_device);
bridge.dc_device = NULL;
}
kick_log(KICK_LOG_INFO, "clipboard bridge: host data-control "
"finished; falling back to %s\n",
bridge.backend == BRIDGE_BACKEND_WL_DATA_DEVICE ?
"focus-based wl_data_device" : "none");
}
static void bridge_dc_device_data_offer(void *data,
struct zwlr_data_control_device_v1 *dev,
struct zwlr_data_control_offer_v1 *offer) {
(void)data; (void)dev;
kick_log(KICK_LOG_DEBUG, "[dbg-host] t=%.0f dc data_offer %p pending_echo=%d "
"primary_pending=%d\n", bridge_dbg_ms(), (void *)offer,
bridge.dc_pending_echo, bridge.dc_primary_pending_echo);
if (bridge.dc_pending_echo) {
bridge.dc_pending_echo = false;
bridge.dc_echo_offer = offer;
} else if (bridge.dc_primary_pending_echo) {
bridge.dc_primary_pending_echo = false;
bridge.dc_primary_echo_offer = offer;
}
bridge_mimes_reset();
zwlr_data_control_offer_v1_add_listener(offer, &bridge_dc_offer_listener, NULL);
}
static void bridge_dc_device_selection(void *data,
struct zwlr_data_control_device_v1 *dev,
struct zwlr_data_control_offer_v1 *offer) {
(void)data; (void)dev;
kick_log(KICK_LOG_DEBUG, "[dbg-host] t=%.0f dc selection offer=%p pending_echo=%d "
"echo_offer=%p\n", bridge_dbg_ms(), (void *)offer,
bridge.dc_pending_echo, (void *)bridge.dc_echo_offer);
bridge_prefetch_cancel();
/* Destroying our own previous source in bridge_host_set_selection makes the
compositor briefly emit selection(NULL) before the echo of the new source;
it is not a real clear, so ignore it while our echo is still pending. */
if (!offer && bridge.dc_pending_echo)
return;
if (offer && offer == bridge.dc_echo_offer) {
bridge.dc_echo_offer = NULL;
bridge_mimes_reset();
zwlr_data_control_offer_v1_destroy(offer);
bridge.dc_pending_echo = false;
return;
}
bridge.dc_pending_echo = false;
bridge.dd_pending_echo = false;
if (bridge.dc_offer)
zwlr_data_control_offer_v1_destroy(bridge.dc_offer);
bridge.dc_offer = offer;
if (!offer) {
bridge_mimes_reset();
bridge_clear_nested();
return;
}
bridge_prefetch_start();
bridge_mirror_to_nested();
}
/* Primary selection bridged over the same data-control device (v2): the
host's primary_selection event mirrors the host's middle-click selection
into the nested seat (and the echo of our own set is swallowed). */
static void bridge_dc_device_primary_selection(void *data,
struct zwlr_data_control_device_v1 *dev,
struct zwlr_data_control_offer_v1 *offer) {
(void)data; (void)dev;
if (offer && offer == bridge.dc_primary_echo_offer) {
bridge.dc_primary_echo_offer = NULL;
bridge.dc_primary_pending_echo = false;
bridge_mimes_reset();
zwlr_data_control_offer_v1_destroy(offer);
kick_log(KICK_LOG_DEBUG, "[bridge] primary echo swallowed\n");
return;
}
if (offer == NULL) {
/* Like the clipboard's selection(NULL): destroying our previous source
in bridge_host_set_primary_selection makes the compositor briefly
emit primary_selection(NULL) before the echo of the new one, which is
not a real clear -- let pending stay armed for the echo's data_offer. */
if (bridge.dc_primary_pending_echo)
return;
bridge.dc_primary_offer = NULL;
bridge_mimes_reset();
bridge_primary_prefetch_cancel();
bridge_primary_clear_nested();
return;
}
bridge.dc_primary_pending_echo = false;
if (bridge.dc_primary_offer)
zwlr_data_control_offer_v1_destroy(bridge.dc_primary_offer);
bridge.dc_primary_offer = offer;
kick_log(KICK_LOG_DEBUG, "[bridge] host primary_selection offer\n");
/* The offer's mimes were collected by the preceding data_offer/offer
events; the data_offer handler has already reset bridge.mimes. */
bridge_primary_prefetch_start();
bridge_mirror_primary_to_nested();
}
static const struct zwlr_data_control_device_v1_listener bridge_dc_listener = {
.data_offer = bridge_dc_device_data_offer,
.selection = bridge_dc_device_selection,
.primary_selection = bridge_dc_device_primary_selection,
.finished = bridge_dc_device_finished,
};
/* ---------------- host backend: wl_data_device (focus-based) ---------------- */
static void bridge_dd_source_send(void *data, struct wl_data_source *src,
const char *mime, int32_t fd) {
(void)data; (void)src;
kick_log(KICK_LOG_DEBUG, "[dbg-host] t=%.0f dd_source_send mime=%s fd=%d "
"inner_src=%p\n", bridge_dbg_ms(), mime, fd,
(void *)bridge.inner_src);
if (bridge.inner_src) {
wlr_data_source_send(bridge.inner_src, mime, fd);
kick_log(KICK_LOG_DEBUG, "[dbg-host] t=%.0f dd_source_send "
"forwarded mime=%s fd=%d\n", bridge_dbg_ms(), mime, fd);
} else
close(fd);
}
static void bridge_dd_source_cancelled(void *data, struct wl_data_source *src) {
(void)data;
wl_data_source_destroy(src);
bridge.dd_source = NULL;
bridge.dc_pending_echo = false;
bridge.dd_pending_echo = false;
bridge.host_set_pending = true;
}
static const struct wl_data_source_listener bridge_dd_source_listener = {
.send = bridge_dd_source_send,
.cancelled = bridge_dd_source_cancelled,
};
static void bridge_dd_offer_mime(void *data, struct wl_data_offer *offer,
const char *mime) {
(void)data; (void)offer;
bridge_mimes_append(mime);
}
static const struct wl_data_offer_listener bridge_dd_offer_listener = {
.offer = bridge_dd_offer_mime,
/* source_actions / action left unset: drag & drop is not bridged */
};
static void bridge_dd_data_offer(void *data, struct wl_data_device *dev,
struct wl_data_offer *offer) {
(void)data; (void)dev;
kick_log(KICK_LOG_DEBUG, "[dbg-host] t=%.0f dd data_offer %p pending_echo=%d\n",
bridge_dbg_ms(), (void *)offer, bridge.dd_pending_echo);
if (bridge.dd_pending_echo) {
bridge.dd_pending_echo = false;
bridge.dd_echo_offer = offer;
}
bridge_mimes_reset();
wl_data_offer_add_listener(offer, &bridge_dd_offer_listener, NULL);
}
static void bridge_dd_selection(void *data, struct wl_data_device *dev,
struct wl_data_offer *offer) {
(void)data; (void)dev;
kick_log(KICK_LOG_DEBUG, "[dbg-host] t=%.0f dd selection offer=%p pending_echo=%d "
"echo_offer=%p\n", bridge_dbg_ms(), (void *)offer,
bridge.dd_pending_echo, (void *)bridge.dd_echo_offer);
if (!offer) {
/* Focus blip: the host selection is momentarily gone (or we lost
keyboard focus). Keep the last-known nested selection and, above
all, leave the pending-echo flags intact so an in-flight dc/dd
set_selection reply is still recognized as our own echo. */
bridge_mimes_reset();
return;
}
bridge_prefetch_cancel();
if (offer == bridge.dd_echo_offer) {
bridge.dd_echo_offer = NULL;
bridge_mimes_reset();
wl_data_offer_destroy(offer);
bridge.dd_pending_echo = false;
return;
}
bridge.dc_pending_echo = false;
bridge.dd_pending_echo = false;
if (bridge.dd_offer)
wl_data_offer_destroy(bridge.dd_offer);
bridge.dd_offer = offer;
bridge_prefetch_start();
bridge_mirror_to_nested();
}
static const struct wl_data_device_listener bridge_dd_listener = {
.data_offer = bridge_dd_data_offer,
.selection = bridge_dd_selection,
/* enter/leave/motion/drop left unset: drag & drop is not bridged */
};
/* ---------------- nested seat side ---------------- */
static void bridge_dbg_src_destroyed(struct wl_listener *l, void *data) {
(void)data;
kick_log(KICK_LOG_DEBUG, "[dbg-src] t=%.0f nested selection source destroyed\n",
bridge_dbg_ms());
wl_list_remove(&l->link);
free(l);
}
static double bridge_dbg_ms(void) {
struct timespec ts;
clock_gettime(CLOCK_MONOTONIC, &ts);
return (double)ts.tv_sec * 1000.0 + (double)ts.tv_nsec / 1e6;
}
static void bridge_seat_request_set_selection(struct wl_listener *l, void *data) {
(void)l;
struct wlr_seat_request_set_selection_event *event = data;
bridge.inner_clear_requested = (event->source == NULL);
kick_log(KICK_LOG_DEBUG, "[dbg-bridge] t=%.0f request_set_selection "
"src=%p impl=%p serial=%u\n", bridge_dbg_ms(), (void *)event->source,
(void *)(event->source ? event->source->impl : NULL),
event->serial);
if (event->source) {
struct wl_listener *dl = calloc(1, sizeof(*dl));
if (dl) {
dl->notify = bridge_dbg_src_destroyed;
wl_signal_add(&event->source->events.destroy, dl);
}
}
wlr_seat_set_selection(server.seat, event->source, event->serial);
}
static void seat_request_set_primary_selection(struct wl_listener *l,
void *data) {
(void)l;
struct wlr_seat_request_set_primary_selection_event *event = data;
bridge.inner_primary_clear_requested = (event->source == NULL);
wlr_seat_set_primary_selection(server.seat, event->source, event->serial);
}
/* An idle-inhibit-v1 inhibitor was destroyed. Recompute the inhibited flag
from the surviving inhibitors. */
static void handle_idle_inhibitor_destroy(struct wl_listener *listener, void *data) {
(void)data;
wl_list_remove(&listener->link);
server.idle_inhibited = !wl_list_empty(&server.idle_inhibitors);
wlr_idle_notifier_v1_set_inhibited(server.idle_notifier, server.idle_inhibited);
free(listener);
}
/* A client bound idle-inhibit-v1 and added an inhibitor: keep the notifier
inhibited until every inhibitor is gone (labwc's idle.c behaviour). */
static void handle_idle_new_inhibitor(struct wl_listener *listener, void *data) {
(void)listener;
struct wlr_idle_inhibitor_v1 *inhibitor = data;
/* Track each inhibitor with its own heap-allocated listener so a destroy
signal can remove exactly that inhibitor from the shared list. */
struct wl_listener *l = calloc(1, sizeof(*l));
l->notify = handle_idle_inhibitor_destroy;
wl_signal_add(&inhibitor->events.destroy, l);
wl_list_insert(&server.idle_inhibitors, &l->link);
server.idle_inhibited = !wl_list_empty(&server.idle_inhibitors);
wlr_idle_notifier_v1_set_inhibited(server.idle_notifier, server.idle_inhibited);
}
/* ===================== Tearing + fractional-scale =====================
- wp-tearing-control-v1 lets a surface request unthrottled presentation.
The shown tab's focused surface hint drives the output commit's
async-flip flag: on DRM this becomes a real tearing page flip (game
tabs pair it with content-type=game); headless/nested outputs ignore
the flag, correctly, since a tear cannot pass through the host.
- wp-fractional-scale-v1 tells a surface the output scale. kick's
output scale is fixed per session, so each surface is notified once
at claim (from the live output scale, covering HiDPI DRM too). */
struct kick_tearing {
struct wlr_tearing_control_v1 *tc;
struct wl_listener set_hint;
struct wl_listener destroy;
};
static void handle_tearing_hint(struct wl_listener *listener, void *data) {
struct kick_tearing *kt = wl_container_of(listener, kt, set_hint);
(void)data;
kick_log(KICK_LOG_DEBUG, "[tearing] surface %p hint=%d\n",
(void *)kt->tc->surface, (int)kt->tc->current);
/* The commit path re-reads the hint every frame, but a hint change
alone produces no frame: request one so async takes effect (or
stops) promptly. */
kick_request_redraw();
}
static void handle_tearing_destroy(struct wl_listener *listener, void *data) {
struct kick_tearing *kt = wl_container_of(listener, kt, destroy);
(void)data;
wl_list_remove(&kt->set_hint.link);
wl_list_remove(&kt->destroy.link);
free(kt);
}
static void handle_tearing_new_object(struct wl_listener *listener,
void *data) {
(void)listener;
struct wlr_tearing_control_v1 *tc = data;
struct kick_tearing *kt = calloc(1, sizeof(*kt));
if (!kt)
return;
kt->tc = tc;
kt->set_hint.notify = handle_tearing_hint;
wl_signal_add(&tc->events.set_hint, &kt->set_hint);
kt->destroy.notify = handle_tearing_destroy;
wl_signal_add(&tc->events.destroy, &kt->destroy);
kick_log(KICK_LOG_DEBUG, "[tearing] surface %p hint=%d\n",
(void *)tc->surface, (int)tc->current);
}
/* Whether the shown tab's focused surface asked for async presentation. */
static bool shown_surface_wants_tearing(void) {
if (!server.tearing_mgr)
return false;
struct kick_window *w = tab_current_window(server.active_tab);
struct wlr_surface *s = window_surface(w);
if (!s)
return false;
return wlr_tearing_control_manager_v1_surface_hint_from_surface(
server.tearing_mgr, s) ==
WP_TEARING_CONTROL_V1_PRESENTATION_HINT_ASYNC;
}
/* Apply the shown surface's hint to an output commit. Logs transitions
only, so steady vsync (the common case) stays quiet at debug level. */
static void apply_tearing_hint(struct wlr_output_state *state) {
bool async = shown_surface_wants_tearing();
state->tearing_page_flip = async;
static bool last_async = false;
if (async != last_async) {
last_async = async;
struct kick_window *w = tab_current_window(server.active_tab);
kick_log(KICK_LOG_DEBUG, "[tearing] %s app=%d\n", async ? "async" : "vsync",
w ? tab_index(w->tab) : -1);
}
}
/* ===================== Keyboard shortcuts inhibit =====================
A fullscreen game/VM asks that the compositor stop processing its keyboard
shortcuts so they reach the client instead. Honored only while the
inhibitor's surface actually has keyboard focus: new inhibitors for the
focused surface activate immediately, and a lazy sync at grab-chord time
(de)activates across focus changes. While honored, the tab/window grab
chords are swallowed (see process_key_event); quit and VT switch stay
available so a stuck client can never trap the session. */
static void handle_kb_inhibit_new_inhibitor(struct wl_listener *listener,
void *data) {
(void)listener;
struct wlr_keyboard_shortcuts_inhibitor_v1 *inhib = data;
struct wlr_surface *focused = server.seat ?
server.seat->keyboard_state.focused_surface : NULL;
if (inhib->surface == focused)
wlr_keyboard_shortcuts_inhibitor_v1_activate(inhib);
}
/* Sync (in)active across focus changes and report whether the FOCUSED
surface's shortcuts are currently inhibited. Evaluated lazily at grab-
chord time so every focus path (tab switch, lock, xwayland OR, nested)
is covered without hooking each one. */
static bool kb_inhibit_focused(void) {
if (!server.kb_inhibit_mgr || !server.seat) return false;
struct wlr_surface *focused =
server.seat->keyboard_state.focused_surface;
bool inhibited = false;
struct wlr_keyboard_shortcuts_inhibitor_v1 *inhib;
wl_list_for_each(inhib, &server.kb_inhibit_mgr->inhibitors, link) {
bool mine = (inhib->surface == focused);
if (mine && !inhib->active)
wlr_keyboard_shortcuts_inhibitor_v1_activate(inhib);
else if (!mine && inhib->active)
wlr_keyboard_shortcuts_inhibitor_v1_deactivate(inhib);
if (mine)
inhibited = inhib->active;
}
return inhibited;
}
/* ===================== Output power management =====================
A client (wlopm) blanks or unblanks an output. kick has a single output,
so any set_mode for it toggles the whole session: OFF makes the render
paths overwrite the composited scene with black before commit (see
render_standalone / render_and_present), so the committed frame is truly
dark rather than a stale scene frame. Starts powered (see server init). */
static void handle_output_power_set_mode(struct wl_listener *listener,
void *data) {
(void)listener;
struct wlr_output_power_v1_set_mode_event *ev = data;
if (ev->output != server.output) return;
bool on = (ev->mode == ZWLR_OUTPUT_POWER_V1_MODE_ON);
if (on == server.output_powered) return;
server.output_powered = on;
kick_log(KICK_LOG_INFO, "[power] output %s\n", on ? "on" : "off");
if (on && server.scene_output) {
/* The swapchain recycles buffers, so the black power-off frame is
still sitting in it with no scene damage outstanding. Force a
full repaint so the scene is re-composited instead of re-committing
the stale black buffer. */
wlr_damage_ring_add_whole(&server.scene_output->damage_ring);
}
kick_request_redraw();
}
/* Gamma control: apply the client's ramp to the single output (or reset it
when the control went away: wlroots emits set_gamma with NULL then). A
failed commit fails the control so the client (wlsunset) retries later
instead of waiting on a ramp that never landed. */
static void handle_gamma_set(struct wl_listener *listener, void *data) {
(void)listener;
struct wlr_gamma_control_manager_v1_set_gamma_event *ev = data;
if (ev->output != server.output) {
if (ev->control)
wlr_gamma_control_v1_send_failed_and_destroy(ev->control);
return;
}
struct wlr_output_state state;
wlr_output_state_init(&state);
bool ok = wlr_gamma_control_v1_apply(ev->control, &state);
if (ok)
ok = wlr_output_commit_state(ev->output, &state);
wlr_output_state_finish(&state);
if (!ok) {
if (ev->control)
wlr_gamma_control_v1_send_failed_and_destroy(ev->control);
return;
}
kick_log(KICK_LOG_DEBUG, "[gamma] ramp %s size=%zu\n",
ev->control ? "applied" : "reset",
ev->control ? ev->control->ramp_size : 0);
}
/* ===================== Virtual keyboard/pointer =====================
Synthesised input (wtype & co.) feeds the seat through the exact same
paths as real devices: virtual keys go through process_key_event so grab
chords work, virtual pointer motion/buttons drive native_ptr_* and the
seat. The client may omit the keymap (wtype sends keys only); then the
server's keymap is installed so modifiers resolve. Cleanup uses a
resource-destroy listener, which libwayland runs before wlroots'
destructor (wlr_keyboard/pointer_finish asserts empty listener lists). */
/* Forward declarations: the real-device input paths these reuse live below. */
static bool process_key_event(uint32_t time, uint32_t key, uint32_t state,
uint32_t mods_depressed);
static void process_modifiers(uint32_t mods_depressed, uint32_t mods_latched,
uint32_t mods_locked, uint32_t group);
/* Text-input section (defined with the seat handlers): forward a key or
modifier state to the IME's keyboard grab instead of the seat. Returns
true when a grab consumed the event. */
static bool im_grab_forward_key(uint32_t time, uint32_t key, uint32_t state);
static bool im_grab_forward_modifiers(struct wlr_keyboard *kb);
static void native_ptr_motion(uint32_t time, struct wlr_input_device *dev,
double dx, double dy);
static void native_ptr_abs(uint32_t time, struct wlr_input_device *dev,
double x, double y);
static void standalone_ptr_button_event(struct wl_listener *listener,
void *data);
static void standalone_ptr_axis_event(struct wl_listener *listener,
void *data);
static void standalone_ptr_frame_event(struct wl_listener *listener,
void *data);
struct virtual_kb {
struct wlr_virtual_keyboard_v1 *vkb;
struct wl_listener key;
struct wl_listener modifiers;
struct wl_listener destroy;
struct wl_list link;
};
struct virtual_ptr {
struct wlr_virtual_pointer_v1 *vptr;
struct wl_listener motion;
struct wl_listener motion_absolute;
struct wl_listener button;
struct wl_listener axis;
struct wl_listener frame;
struct wl_listener destroy;
struct wl_list link;
};
static void virtual_kbd_key(struct wl_listener *listener, void *data) {
struct virtual_kb *vk = wl_container_of(listener, vk, key);
struct wlr_keyboard_key_event *ev = data;
struct wlr_keyboard *kb = &vk->vkb->keyboard;
uint32_t mods = wlr_keyboard_get_modifiers(kb);
if (!process_key_event(ev->time_msec, ev->keycode, ev->state, mods)) {
if (im_grab_forward_key(ev->time_msec, ev->keycode, ev->state))
return;
wlr_seat_set_keyboard(server.seat, kb);
wlr_seat_keyboard_notify_key(server.seat, ev->time_msec, ev->keycode,
ev->state);
}
}
static void virtual_kbd_modifiers(struct wl_listener *listener, void *data) {
(void)data;
struct virtual_kb *vk = wl_container_of(listener, vk, modifiers);
struct wlr_keyboard *kb = &vk->vkb->keyboard;
process_modifiers(kb->modifiers.depressed, kb->modifiers.latched,
kb->modifiers.locked, kb->modifiers.group);
if (im_grab_forward_modifiers(kb))
return;
wlr_seat_set_keyboard(server.seat, kb);
wlr_seat_keyboard_notify_modifiers(server.seat, &kb->modifiers);
}
static void virtual_kbd_destroy(struct wl_listener *listener, void *data) {
(void)data;
struct virtual_kb *vk = wl_container_of(listener, vk, destroy);
wl_list_remove(&vk->key.link);
wl_list_remove(&vk->modifiers.link);
wl_list_remove(&vk->link);
free(vk);
}
static void handle_virtual_kb_new(struct wl_listener *listener, void *data) {
(void)listener;
struct wlr_virtual_keyboard_v1 *vkb = data;
/* Without a client keymap the device never emits modifiers; give it
ours so hotkeys and the seat work (a later client keymap replaces it
inside wlroots). */
if (!vkb->has_keymap && server.xkb_keymap)
wlr_keyboard_set_keymap(&vkb->keyboard, server.xkb_keymap);
struct virtual_kb *vk = calloc(1, sizeof(*vk));
if (!vk) return;
vk->vkb = vkb;
vk->key.notify = virtual_kbd_key;
wl_signal_add(&vkb->keyboard.events.key, &vk->key);
vk->modifiers.notify = virtual_kbd_modifiers;
wl_signal_add(&vkb->keyboard.events.modifiers, &vk->modifiers);
vk->destroy.notify = virtual_kbd_destroy;
wl_resource_add_destroy_listener(vkb->resource, &vk->destroy);
wl_list_insert(&server.virtual_kbs, &vk->link);
kick_log(KICK_LOG_INFO, "[input] virtual keyboard\n");
}
static void virtual_ptr_motion(struct wl_listener *listener, void *data) {
struct virtual_ptr *vp = wl_container_of(listener, vp, motion);
struct wlr_pointer_motion_event *ev = data;
native_ptr_motion(ev->time_msec, &vp->vptr->pointer.base,
ev->delta_x, ev->delta_y);
}
static void virtual_ptr_abs(struct wl_listener *listener, void *data) {
struct virtual_ptr *vp = wl_container_of(listener, vp, motion_absolute);
struct wlr_pointer_motion_absolute_event *ev = data;
native_ptr_abs(ev->time_msec, &vp->vptr->pointer.base, ev->x, ev->y);
}
static void virtual_ptr_destroy(struct wl_listener *listener, void *data) {
(void)data;
struct virtual_ptr *vp = wl_container_of(listener, vp, destroy);
wl_list_remove(&vp->motion.link);
wl_list_remove(&vp->motion_absolute.link);
wl_list_remove(&vp->button.link);
wl_list_remove(&vp->axis.link);
wl_list_remove(&vp->frame.link);
wl_list_remove(&vp->link);
free(vp);
}
static void handle_virtual_ptr_new(struct wl_listener *listener, void *data) {
(void)listener;
struct wlr_virtual_pointer_v1_new_pointer_event *ev = data;
struct wlr_virtual_pointer_v1 *vptr = ev->new_pointer;
struct virtual_ptr *vp = calloc(1, sizeof(*vp));
if (!vp) return;
vp->vptr = vptr;
vp->motion.notify = virtual_ptr_motion;
wl_signal_add(&vptr->pointer.events.motion, &vp->motion);
vp->motion_absolute.notify = virtual_ptr_abs;
wl_signal_add(&vptr->pointer.events.motion_absolute, &vp->motion_absolute);
/* Button/axis/frame ignore their listener container, so reuse the real
device handlers directly. */
vp->button.notify = standalone_ptr_button_event;
wl_signal_add(&vptr->pointer.events.button, &vp->button);
vp->axis.notify = standalone_ptr_axis_event;
wl_signal_add(&vptr->pointer.events.axis, &vp->axis);
vp->frame.notify = standalone_ptr_frame_event;
wl_signal_add(&vptr->pointer.events.frame, &vp->frame);
vp->destroy.notify = virtual_ptr_destroy;
wl_resource_add_destroy_listener(vptr->resource, &vp->destroy);
wl_list_insert(&server.virtual_ptrs, &vp->link);
kick_log(KICK_LOG_INFO, "[input] virtual pointer\n");
}
/* ===================== Xdg-activation =====================
Launchers focus windows by token instead of racing map order. On
request_activate, find the kick window owning the surface and switch to
its tab (set_active_tab lands on the tab's current window; window_enter
then focuses the exact surface). Both are gated on session_locked, so
activation can never bypass the lock screen. */
static void handle_xdg_activation_request(struct wl_listener *listener,
void *data) {
(void)listener;
struct wlr_xdg_activation_v1_request_activate_event *ev = data;
if (!ev->surface) return;
struct kick_tab *tab;
wl_list_for_each(tab, &server.tabs, link) {
struct kick_window *w;
wl_list_for_each(w, &tab->windows, link) {
if (window_surface(w) == ev->surface) {
kick_log(KICK_LOG_INFO, "[activation] focus tab=%d\n",
tab_index(tab));
set_active_tab(tab);
window_enter(w);
return;
}
}
}
}
/* ===================== Foreign toplevel management =====================
Taskbars/switchers (waybar taskbar, disorder, etc.) enumerate kick's
windows through wlr-foreign-toplevel-management-v1 and
ext-foreign-toplevel-list-v1. Each surfaced kick_window owns one of each
handle; the state sync helpers below mirror kick's own window state onto
the handles, and the request handlers translate taskbar requests into the
existing window_* control calls. */
/* wlroots' set_app_id / set_title strdup their argument, so a NULL (an xdg
toplevel that has not yet been given an app_id / title) would crash. Use
"" instead; the client corrects us via set_app_id/set_title once it maps. */
static const char *foreign_str(const char *s) {
return s ? s : "";
}
static void foreign_sync_title(struct kick_window *w) {
if (w->ft_handle)
wlr_foreign_toplevel_handle_v1_set_title(w->ft_handle, foreign_str(window_title(w)));
if (w->ext_handle) {
struct wlr_ext_foreign_toplevel_handle_v1_state st = {
.title = foreign_str(window_title(w)),
.app_id = foreign_str(window_app_id(w)),
};
wlr_ext_foreign_toplevel_handle_v1_update_state(w->ext_handle, &st);
}
}
static void foreign_sync_app_id(struct kick_window *w) {
if (w->ft_handle)
wlr_foreign_toplevel_handle_v1_set_app_id(w->ft_handle, foreign_str(window_app_id(w)));
if (w->ext_handle) {
struct wlr_ext_foreign_toplevel_handle_v1_state st = {
.title = foreign_str(window_title(w)),
.app_id = foreign_str(window_app_id(w)),
};
wlr_ext_foreign_toplevel_handle_v1_update_state(w->ext_handle, &st);
}
}
static void foreign_sync_output(struct kick_window *w) {
if (!w->ft_handle || !server.output) return;
wlr_foreign_toplevel_handle_v1_output_enter(w->ft_handle, server.output);
}
static void handle_foreign_request_activate(struct wl_listener *listener, void *data) {
(void)data;
struct kick_window *w = wl_container_of(listener, w, ft_activate);
set_active_tab(w->tab);
window_enter(w);
}
static void handle_foreign_request_close(struct wl_listener *listener, void *data) {
(void)data;
struct kick_window *w = wl_container_of(listener, w, ft_close);
close_window(w);
}
static void handle_foreign_request_maximize(struct wl_listener *listener, void *data) {
(void)data;
struct kick_window *w = wl_container_of(listener, w, ft_maximize);
window_set_maximized(w, true);
}
static void handle_foreign_request_fullscreen(struct wl_listener *listener, void *data) {
struct wlr_foreign_toplevel_handle_v1_fullscreen_event *event = data;
struct kick_window *w = wl_container_of(listener, w, ft_fullscreen);
window_set_fullscreen(w, event->fullscreen);
if (event->fullscreen)
host_apply_fullscreen(true);
}
static void handle_foreign_handle_destroy(struct wl_listener *listener, void *data) {
(void)data;
struct kick_window *w = wl_container_of(listener, w, ft_handle_destroy);
/* wlroots asserts every listener list is empty before it destroys the
handle, so tear down the request listeners (and our own destroy link)
here -- this runs from the wlr_foreign_toplevel_handle_v1_destroy's
events.destroy emission, before those assertions. */
wl_list_remove(&w->ft_activate.link);
wl_list_remove(&w->ft_close.link);
wl_list_remove(&w->ft_maximize.link);
wl_list_remove(&w->ft_fullscreen.link);
wl_list_remove(&w->ft_handle_destroy.link);
w->ft_handle = NULL;
}
static void handle_ext_foreign_handle_destroy(struct wl_listener *listener, void *data) {
(void)data;
struct kick_window *w = wl_container_of(listener, w, ext_handle_destroy);
wl_list_remove(&w->ext_handle_destroy.link);
w->ext_handle = NULL;
}
/* ======================= ext-session-lock-v1 =======================
The session is locked by an external lock client (e.g. swaylock) that
grabbed ext_session_lock_manager_v1. While locked the screen is blanked
with an opaque black rect and the lock client's per-output surface floats
above it; every grab chord is swallowed (see process_key_event) and no
window may take keyboard focus (window_enter / set_active_tab guard on
server.session_locked). kick manages a single output, so a single lock
surface is tracked. If the lock client dies without unlocking, the screen
stays blanked (server.session_locked remains true) and only a fresh lock
request may take over. */
/* Create the lock scene tree and blank the output with an opaque black rect
rooted at the output origin. Idempotent. */
static void session_lock_blank(void) {
if (server.lock_surface_tree)
return;
server.lock_surface_tree = wlr_scene_tree_create(&server.scene->tree);
if (server.output)
server.lock_backdrop = wlr_scene_rect_create(server.lock_surface_tree,
server.output->width, server.output->height,
(float[4]){ 0, 0, 0, 1 });
wlr_scene_node_raise_to_top(&server.lock_surface_tree->node);
kick_request_redraw();
}
/* Destroy the lock scene tree (removing the black rect and the lock surface
subtree with it). Idempotent. */
static void session_lock_unblank(void) {
if (server.lock_surface_tree)
wlr_scene_node_destroy(&server.lock_surface_tree->node);
server.lock_surface_tree = NULL;
server.lock_backdrop = NULL;
server.lock_surface_ssd = NULL;
kick_request_redraw();
}
/* Put the lock surface's scene subtree in place, above the black backdrop,
and configure it to the output's current dimensions. */
static void session_lock_surface_place(struct wlr_session_lock_surface_v1 *ls) {
if (!ls || !ls->surface)
return;
session_lock_blank();
if (!server.lock_surface_ssd) {
server.lock_surface_ssd = wlr_scene_subsurface_tree_create(
server.lock_surface_tree, ls->surface);
wlr_scene_node_raise_to_top(&server.lock_surface_ssd->node);
}
if (server.output)
wlr_session_lock_surface_v1_configure(ls, server.output->width,
server.output->height);
}
/* The lock surface rendered and the whole output is blanked: give it the
keyboard and pointer so the lock client (swaylock's prompt) receives input.
Delegated to an idle callback because at map time wlroots has only processed
the role commit and the surface/buffer isn't settable-focusable yet. */
static void session_lock_focus_surface(void *data) {
(void)data;
struct wlr_session_lock_surface_v1 *ls = server.lock_surface;
if (!ls || !ls->surface)
return;
struct wlr_keyboard *kbd = wlr_seat_get_keyboard(server.seat);
if (!kbd) kbd = &server.keyboard;
wlr_seat_keyboard_notify_enter(server.seat, ls->surface,
kbd->keycodes, kbd->num_keycodes, &kbd->modifiers);
wlr_seat_pointer_notify_enter(server.seat, ls->surface, 0, 0);
wlr_seat_pointer_notify_motion(server.seat, 0, 0, 0);
kick_request_redraw();
}
static void handle_session_lock_surface_map(struct wl_listener *listener, void *data) {
(void)listener; (void)data;
wl_event_loop_add_idle(server.loop, session_lock_focus_surface, NULL);
}
static void handle_session_lock_surface_destroy(struct wl_listener *listener, void *data) {
(void)listener; (void)data;
wlr_seat_keyboard_notify_clear_focus(server.seat);
wlr_seat_pointer_notify_clear_focus(server.seat);
wl_list_remove(&server.lock_surface_destroy.link);
wl_list_remove(&server.lock_surface_map.link);
server.lock_surface = NULL;
server.lock_surface_ssd = NULL;
kick_request_redraw();
}
static void handle_session_lock_new_surface(struct wl_listener *listener, void *data) {
(void)listener;
struct wlr_session_lock_surface_v1 *ls = data;
server.lock_surface = ls;
server.lock_surface_destroy.notify = handle_session_lock_surface_destroy;
wl_signal_add(&ls->events.destroy, &server.lock_surface_destroy);
server.lock_surface_map.notify = handle_session_lock_surface_map;
wl_signal_add(&ls->surface->events.map, &server.lock_surface_map);
session_lock_surface_place(ls);
}
/* Hand the lock to the next lock in line: replay the focus onto the tab model
now that session_locked is cleared, and show the previously active window. */
static void session_lock_restore_focus(void) {
server.session_locked = false;
struct kick_tab *tab = server.active_tab;
if (tab) {
struct kick_window *enter = tab_current_window(tab);
if (enter)
window_enter(enter);
else
show_window(NULL);
}
kick_request_redraw();
}
static void handle_session_lock_unlock(struct wl_listener *listener, void *data) {
(void)listener; (void)data;
struct wlr_session_lock_v1 *lock = server.session_lock;
if (!lock) return;
if (server.lock_surface) {
wl_list_remove(&server.lock_surface_destroy.link);
wl_list_remove(&server.lock_surface_map.link);
server.lock_surface = NULL;
server.lock_surface_ssd = NULL;
}
session_lock_unblank();
session_lock_restore_focus();
}
static void handle_session_lock_destroy(struct wl_listener *listener, void *data) {
(void)listener; (void)data;
/* The lock client died without unlocking: the screen stays locked and
blanked (session_locked remains true) as a deliberate security choice.
Only a fresh lock request may take over. */
if (server.session_lock) {
wl_list_remove(&server.session_lock_unlock.link);
wl_list_remove(&server.session_lock_new_surface.link);
wl_list_remove(&server.session_lock_destroy.link);
}
server.session_lock = NULL;
if (server.lock_surface) {
wl_list_remove(&server.lock_surface_destroy.link);
wl_list_remove(&server.lock_surface_map.link);
server.lock_surface = NULL;
server.lock_surface_ssd = NULL;
}
kick_request_redraw();
}
static void handle_session_lock_new_lock(struct wl_listener *listener, void *data) {
(void)listener;
struct wlr_session_lock_v1 *lock = data;
/* A second lock while already locked is refused outright. If an earlier
lock client died (session_locked true, session_lock NULL), replace the
blanked state: tear down the old lock surfaces and proceed. */
if (server.session_locked && server.session_lock) {
wlr_session_lock_v1_destroy(lock);
return;
}
if (server.session_locked) {
session_lock_unblank();
if (server.lock_surface) {
wl_list_remove(&server.lock_surface_destroy.link);
wl_list_remove(&server.lock_surface_map.link);
server.lock_surface = NULL;
server.lock_surface_ssd = NULL;
}
}
server.session_lock = lock;
server.session_locked = true;
server.session_lock_new_surface.notify = handle_session_lock_new_surface;
wl_signal_add(&lock->events.new_surface, &server.session_lock_new_surface);
server.session_lock_unlock.notify = handle_session_lock_unlock;
wl_signal_add(&lock->events.unlock, &server.session_lock_unlock);
server.session_lock_destroy.notify = handle_session_lock_destroy;
wl_signal_add(&lock->events.destroy, &server.session_lock_destroy);
/* Draw nothing but the black blank while locked; no window may grab
focus (window_enter / set_active_tab are gated on session_locked). */
show_window(NULL);
struct wlr_keyboard *kbd = wlr_seat_get_keyboard(server.seat);
if (kbd) wlr_seat_keyboard_notify_clear_focus(server.seat);
wlr_seat_pointer_notify_clear_focus(server.seat);
session_lock_blank();
wlr_session_lock_v1_send_locked(lock);
}
/* Create the taskbar-visible handles for a freshly-claimed window and seed
their initial state. Called once a window has the client's app_id/title
(i.e. at claim time). */
static void foreign_handle_create(struct kick_window *w) {
if (!server.foreign_mgr || !server.ext_foreign_list || w->ft_handle) return;
w->ft_handle = wlr_foreign_toplevel_handle_v1_create(server.foreign_mgr);
if (!w->ft_handle) return;
wlr_foreign_toplevel_handle_v1_set_app_id(w->ft_handle, foreign_str(window_app_id(w)));
wlr_foreign_toplevel_handle_v1_set_title(w->ft_handle, foreign_str(window_title(w)));
wlr_foreign_toplevel_handle_v1_set_maximized(w->ft_handle, true);
wlr_foreign_toplevel_handle_v1_set_activated(w->ft_handle, w->focused);
foreign_sync_output(w);
struct wlr_ext_foreign_toplevel_handle_v1_state st = {
.title = foreign_str(window_title(w)),
.app_id = foreign_str(window_app_id(w)),
};
w->ext_handle = wlr_ext_foreign_toplevel_handle_v1_create(server.ext_foreign_list, &st);
w->ft_activate.notify = handle_foreign_request_activate;
wl_signal_add(&w->ft_handle->events.request_activate, &w->ft_activate);
w->ft_close.notify = handle_foreign_request_close;
wl_signal_add(&w->ft_handle->events.request_close, &w->ft_close);
w->ft_maximize.notify = handle_foreign_request_maximize;
wl_signal_add(&w->ft_handle->events.request_maximize, &w->ft_maximize);
w->ft_fullscreen.notify = handle_foreign_request_fullscreen;
wl_signal_add(&w->ft_handle->events.request_fullscreen, &w->ft_fullscreen);
w->ft_handle_destroy.notify = handle_foreign_handle_destroy;
wl_signal_add(&w->ft_handle->events.destroy, &w->ft_handle_destroy);
if (w->ext_handle) {
w->ext_handle_destroy.notify = handle_ext_foreign_handle_destroy;
wl_signal_add(&w->ext_handle->events.destroy, &w->ext_handle_destroy);
}
}
static void foreign_handle_destroy(struct kick_window *w) {
if (w->ft_handle)
wlr_foreign_toplevel_handle_v1_destroy(w->ft_handle);
if (w->ext_handle)
wlr_ext_foreign_toplevel_handle_v1_destroy(w->ext_handle);
w->ft_handle = NULL;
w->ext_handle = NULL;
}
static void bridge_host_set_selection(struct wlr_data_source *src) {
kick_log(KICK_LOG_DEBUG, "[dbg-bridge] t=%.0f host_set_selection src=%p impl=%p "
"backend=%d dc_device=%p mimes=%zu\n", bridge_dbg_ms(),
(void *)src, (void *)(src ? src->impl : NULL), bridge.backend,
(void *)bridge.dc_device,
src ? src->mime_types.size / sizeof(char *) : 0);
bridge_set_inner_src(src);
if (bridge.backend == BRIDGE_BACKEND_DATA_CONTROL && bridge.dc_device) {
if (bridge.dc_source) {
zwlr_data_control_source_v1_destroy(bridge.dc_source);
bridge.dc_source = NULL;
}
struct zwlr_data_control_source_v1 *s =
zwlr_data_control_manager_v1_create_data_source(bridge.dc_manager);
char **p;
wl_array_for_each(p, &src->mime_types)
zwlr_data_control_source_v1_offer(s, *p);
zwlr_data_control_source_v1_add_listener(s, &bridge_dc_source_listener, NULL);
bridge.dc_source = s;
bridge.dc_pending_echo = true;
bridge.dd_pending_echo = true;
zwlr_data_control_device_v1_set_selection(bridge.dc_device, s);
bridge.host_set_pending = false;
return;
}
if (bridge.backend == BRIDGE_BACKEND_WL_DATA_DEVICE && bridge.dd) {
if (bridge.dd_source) {
wl_data_source_destroy(bridge.dd_source);
bridge.dd_source = NULL;
}
if (!bridge.kbd_serial) {
bridge.host_set_pending = true;
kick_log(KICK_LOG_INFO, "clipboard bridge: no host keyboard "
"serial yet; deferring host set_selection until focus\n");
return;
}
struct wl_data_source *s =
wl_data_device_manager_create_data_source(bridge.ddm);
char **p;
wl_array_for_each(p, &src->mime_types)
wl_data_source_offer(s, *p);
wl_data_source_add_listener(s, &bridge_dd_source_listener, NULL);
bridge.dd_source = s;
bridge.dc_pending_echo = true;
bridge.dd_pending_echo = true;
wl_data_device_set_selection(bridge.dd, s, bridge.kbd_serial);
bridge.host_set_pending = false;
return;
}
}
static void bridge_host_clear(void) {
if (bridge.backend == BRIDGE_BACKEND_DATA_CONTROL && bridge.dc_device)
zwlr_data_control_device_v1_set_selection(bridge.dc_device, NULL);
/* focus-based backend: nothing reliable to clear without focus/serial */
}
static void bridge_host_set_primary_selection(struct wlr_primary_selection_source *src) {
bridge_set_inner_primary_src(src);
/* A nested client is overriding whatever host primary was mirrored in, so
the mirror's prefetch is stale. */
bridge_primary_prefetch_cancel();
if (bridge.backend != BRIDGE_BACKEND_DATA_CONTROL || !bridge.dc_device
|| !bridge.dc_primary_supported)
return; /* wl_data_device / v1 data-control have no primary channel */
if (bridge.dc_primary_source) {
zwlr_data_control_source_v1_destroy(bridge.dc_primary_source);
bridge.dc_primary_source = NULL;
}
if (!src)
return;
struct zwlr_data_control_source_v1 *s =
zwlr_data_control_manager_v1_create_data_source(bridge.dc_manager);
char **p;
wl_array_for_each(p, &src->mime_types)
zwlr_data_control_source_v1_offer(s, *p);
zwlr_data_control_source_v1_add_listener(s,
&bridge_dc_primary_source_listener, NULL);
bridge.dc_primary_source = s;
bridge.dc_primary_pending_echo = true;
zwlr_data_control_device_v1_set_primary_selection(bridge.dc_device, s);
kick_log(KICK_LOG_INFO, "clipboard bridge: primary selection -> host\n");
}
static void bridge_host_primary_clear(void) {
if (bridge.backend == BRIDGE_BACKEND_DATA_CONTROL && bridge.dc_device
&& bridge.dc_primary_supported)
zwlr_data_control_device_v1_set_primary_selection(bridge.dc_device, NULL);
}
static void bridge_seat_set_primary_selection(struct wl_listener *l, void *data) {
(void)l; (void)data;
struct wlr_primary_selection_source *src = server.seat->primary_selection_source;
if (src && src->impl == &bridge_inner_primary_source_impl)
return; /* our own host->nested mirror */
if (bridge.primary_ignore_next_inner) {
bridge.primary_ignore_next_inner = false;
return;
}
if (!src) {
if (bridge.inner_primary_clear_requested) {
bridge.inner_primary_clear_requested = false;
bridge_host_primary_clear();
}
return;
}
bridge.inner_primary_clear_requested = false;
bridge_host_set_primary_selection(src);
}
static void bridge_seat_set_selection(struct wl_listener *l, void *data) {
(void)l; (void)data;
struct wlr_data_source *src = server.seat->selection_source;
kick_log(KICK_LOG_DEBUG, "[dbg-bridge] t=%.0f seat set_selection src=%p "
"impl=%p inner_mirror=%d ignore_next=%d inner_clear_requested=%d\n",
bridge_dbg_ms(), (void *)src, (void *)(src ? src->impl : NULL),
src && src->impl == &bridge_inner_source_impl,
bridge.ignore_next_inner, bridge.inner_clear_requested);
if (src && src->impl == &bridge_inner_source_impl)
return; /* our own host->nested mirror */
if (bridge.ignore_next_inner) {
bridge.ignore_next_inner = false;
return;
}
if (!src) {
if (bridge.inner_clear_requested) {
bridge.inner_clear_requested = false;
bridge_host_clear();
}
return;
}
bridge.inner_clear_requested = false;
bridge_host_set_selection(src);
}
/* ---------------- lifecycle ---------------- */
static void bridge_attach_seat(void) {
bridge.request_set_selection.notify = bridge_seat_request_set_selection;
wl_signal_add(&server.seat->events.request_set_selection,
&bridge.request_set_selection);
bridge.set_selection.notify = bridge_seat_set_selection;
wl_signal_add(&server.seat->events.set_selection, &bridge.set_selection);
bridge.set_primary_selection.notify = bridge_seat_set_primary_selection;
wl_signal_add(&server.seat->events.set_primary_selection,
&bridge.set_primary_selection);
}
static void bridge_init(void) {
if (!host.seat) {
kick_log(KICK_LOG_INFO, "clipboard bridge: no host seat; disabled\n");
return;
}
/* Re-entrant: drop any objects bound to a previous host seat so a runtime
seat re-add (registry churn, e.g. VT round-trip) re-binds cleanly. */
if (bridge.dd)
wl_data_device_release(bridge.dd);
bridge.dd = NULL;
if (bridge.dc_device)
zwlr_data_control_device_v1_destroy(bridge.dc_device);
bridge.dc_device = NULL;
if (bridge.dc_primary_source) {
zwlr_data_control_source_v1_destroy(bridge.dc_primary_source);
bridge.dc_primary_source = NULL;
}
if (bridge.dc_primary_offer) {
zwlr_data_control_offer_v1_destroy(bridge.dc_primary_offer);
bridge.dc_primary_offer = NULL;
}
if (bridge.dc_primary_echo_offer) {
zwlr_data_control_offer_v1_destroy(bridge.dc_primary_echo_offer);
bridge.dc_primary_echo_offer = NULL;
}
bridge.dc_primary_pending_echo = false;
bridge_primary_prefetch_cancel();
bridge.dd_offer = NULL;
bridge.dc_offer = NULL;
bridge.dd_echo_offer = NULL;
bridge.dc_echo_offer = NULL;
bridge.backend = BRIDGE_BACKEND_NONE;
if (bridge.ddm) {
bridge.dd = wl_data_device_manager_get_data_device(bridge.ddm, host.seat);
wl_data_device_add_listener(bridge.dd, &bridge_dd_listener, NULL);
}
if (bridge.dc_manager) {
bridge.dc_device = zwlr_data_control_manager_v1_get_data_device(
bridge.dc_manager, host.seat);
zwlr_data_control_device_v1_add_listener(bridge.dc_device,
&bridge_dc_listener, NULL);
bridge.backend = BRIDGE_BACKEND_DATA_CONTROL;
kick_log(KICK_LOG_INFO, "clipboard bridge: host data-control backend "
"(clipboard and primary selection bridged)\n");
} else if (bridge.dd) {
bridge.backend = BRIDGE_BACKEND_WL_DATA_DEVICE;
kick_log(KICK_LOG_INFO, "clipboard bridge: focus-based wl_data_device "
"backend (host lacks wlr-data-control; host->nested sync needs "
"focus; primary selection not bridged)\n");
} else {
kick_log(KICK_LOG_INFO, "clipboard bridge: no host clipboard path\n");
}
}
static void bridge_cleanup(void) {
if (bridge.inner_src) {
wl_list_remove(&bridge.inner_src_destroy.link);
bridge.inner_src = NULL;
}
if (bridge.inner_primary_src) {
wl_list_remove(&bridge.inner_primary_src_destroy.link);
bridge.inner_primary_src = NULL;
}
if (bridge.dc_source) {
zwlr_data_control_source_v1_destroy(bridge.dc_source);
bridge.dc_source = NULL;
}
if (bridge.dc_primary_source) {
zwlr_data_control_source_v1_destroy(bridge.dc_primary_source);
bridge.dc_primary_source = NULL;
}
if (bridge.dd_source) {
wl_data_source_destroy(bridge.dd_source);
bridge.dd_source = NULL;
}
if (bridge.dc_offer) {
zwlr_data_control_offer_v1_destroy(bridge.dc_offer);
bridge.dc_offer = NULL;
}
if (bridge.dc_primary_offer) {
zwlr_data_control_offer_v1_destroy(bridge.dc_primary_offer);
bridge.dc_primary_offer = NULL;
}
if (bridge.dc_primary_echo_offer) {
zwlr_data_control_offer_v1_destroy(bridge.dc_primary_echo_offer);
bridge.dc_primary_echo_offer = NULL;
}
if (bridge.dd_offer) {
wl_data_offer_destroy(bridge.dd_offer);
bridge.dd_offer = NULL;
}
if (bridge.dc_device) {
zwlr_data_control_device_v1_destroy(bridge.dc_device);
bridge.dc_device = NULL;
}
bridge_mimes_reset();
free(bridge.mimes);
bridge.mimes = NULL;
bridge.mimes_cap = 0;
bridge_prefetch_cancel();
bridge_primary_prefetch_cancel();
bridge.backend = BRIDGE_BACKEND_NONE;
}
/* ===================== Host-side listeners ===================== */
/* The host compositor draws the nested cursor over our window, so a nested
client's cursor-shape-v1 request is forwarded to the host's
wp_cursor_shape_device_v1 (bound to our host wl_pointer). The host only
honors the shape while the pointer sits over our surface and ignores
requests with a stale serial, hence host.ptr_serial. When the host lacks
cursor-shape-v1 this is a no-op and the host keeps its default cursor. */
static void host_cursor_shape_get_pointer(void) {
if (!host.shape_mgr || !host.pointer) {
host.shape_dev = NULL;
return;
}
/* get_pointer = the sole new_id request (opcode 1); the interface symbol
comes from libwlr (we must not also include the generated client header
here: both server and client headers define the shape enum). */
host.shape_dev = (struct wp_cursor_shape_device_v1 *)wl_proxy_marshal_flags(
(struct wl_proxy *)host.shape_mgr, 1 /* WP_CURSOR_SHAPE_MANAGER_V1_GET_POINTER */,
&wp_cursor_shape_device_v1_interface,
wl_proxy_get_version((struct wl_proxy *)host.shape_mgr),
0, NULL, (struct wl_proxy *)host.pointer);
}
static void host_cursor_shape_set(int shape) {
if (!host.shape_dev) {
kick_log(KICK_LOG_DEBUG, "[cursor] host shape n/a\n");
return;
}
wl_proxy_marshal_flags((struct wl_proxy *)host.shape_dev,
1 /* WP_CURSOR_SHAPE_DEVICE_V1_SET_SHAPE */, NULL,
wl_proxy_get_version((struct wl_proxy *)host.shape_dev),
0, host.ptr_serial, (uint32_t)shape);
kick_log(KICK_LOG_DEBUG, "[cursor] host shape %s\n",
wlr_cursor_shape_v1_name((enum wp_cursor_shape_device_v1_shape)shape));
}
/* wl_seat capabilities handler: see host_seat_capabilities() below (defined
after the host keyboard/pointer listeners it installs). */
static void host_seat_capabilities(void *data, struct wl_seat *seat,
uint32_t capabilities);
static void host_seat_name(void *data, struct wl_seat *seat, const char *name) {
(void)data; (void)seat; (void)name;
}
static const struct wl_seat_listener host_seat_listener = {
.capabilities = host_seat_capabilities,
.name = host_seat_name,
};
static void host_registry_global(void *data, struct wl_registry *registry,
uint32_t name, const char *interface,
uint32_t version)
{
(void)data;
if (strcmp(interface, wl_compositor_interface.name) == 0) {
host.compositor = wl_registry_bind(registry, name,
&wl_compositor_interface, version < 4 ? version : 4);
} else if (strcmp(interface, xdg_wm_base_interface.name) == 0) {
host.wm_base = wl_registry_bind(registry, name,
&xdg_wm_base_interface, version < 1 ? version : 1);
} else if (strcmp(interface,
zxdg_decoration_manager_v1_interface.name) == 0) {
/* Advertised by compositors that honor server-side decorations
(labwc/sway/KDE): marks the direct-xdg host-window path. */
host.decoration = wl_registry_bind(registry, name,
&zxdg_decoration_manager_v1_interface, 1);
} else if (strcmp(interface, wl_seat_interface.name) == 0) {
/* Bind the seat and rely on the capabilities event (which the
compositor always sends after a bind) to (re)create the keyboard
and pointer objects -- including after a VT round-trip, where the
compositor invalidates seat objects and a re-bind or capability
re-gain must be observed to keep receiving input. */
host.seat = wl_registry_bind(registry, name,
&wl_seat_interface, version < 5 ? version : 5);
host.seat_name = name;
wl_seat_add_listener(host.seat, &host_seat_listener, NULL);
if (host.registry_synced)
bridge_init(); /* runtime seat re-add: re-establish the bridge */
} else if (strcmp(interface, wp_cursor_shape_manager_v1_interface.name) == 0) {
host.shape_mgr = wl_registry_bind(registry, name,
&wp_cursor_shape_manager_v1_interface,
version < 1 ? version : 1);
kick_log(KICK_LOG_DEBUG, "[cursor] host has cursor-shape-v1\n");
} else if (strcmp(interface, wl_data_device_manager_interface.name) == 0) {
bridge.ddm = wl_registry_bind(registry, name,
&wl_data_device_manager_interface, version < 3 ? version : 3);
} else if (strcmp(interface,
zwlr_data_control_manager_v1_interface.name) == 0) {
bridge.dc_manager = wl_registry_bind(registry, name,
&zwlr_data_control_manager_v1_interface, version < 2 ? version : 2);
bridge.dc_primary_supported =
wl_proxy_get_version((struct wl_proxy *)bridge.dc_manager) >= 2;
if (!bridge.dc_primary_supported)
kick_log(KICK_LOG_INFO, "clipboard bridge: host wlr-data-control "
"v1 only; primary selection not bridged\n");
}
}
static void host_registry_global_remove(void *data, struct wl_registry *registry,
uint32_t name)
{
(void)data; (void)registry;
/* Only the wl_seat global's removal matters to us: its children (keyboard,
pointer, clipboard data devices) are invalidated with it and must be
re-created when the compositor advertises a new seat. Other globals we
bind (compositor, xdg_wm_base, ...) are process-lifetime. */
if (host.seat_name && name == host.seat_name) {
kick_log(KICK_LOG_DEBUG, "[seat] global %u removed\n", name);
host.seat_name = 0;
host.seat = NULL;
host.keyboard = NULL;
host.pointer = NULL;
host.shape_dev = NULL; /* inert with the removed seat's pointer */
/* Seat-owned bridge objects are invalidated too; null them so the
next bridge_init() on a fresh seat re-binds cleanly. */
bridge.dd = NULL;
bridge.dc_device = NULL;
bridge.dd_offer = NULL;
bridge.dc_offer = NULL;
bridge.dd_echo_offer = NULL;
bridge.dc_echo_offer = NULL;
bridge.dc_primary_source = NULL;
bridge.dc_primary_offer = NULL;
bridge.dc_primary_echo_offer = NULL;
bridge_primary_prefetch_cancel();
bridge.backend = BRIDGE_BACKEND_NONE;
}
}
static const struct wl_registry_listener host_registry_listener = {
.global = host_registry_global,
.global_remove = host_registry_global_remove,
};
static void host_xdg_wm_ping(void *data, struct xdg_wm_base *wm, uint32_t serial) {
(void)data;
xdg_wm_base_pong(wm, serial);
}
static const struct xdg_wm_base_listener host_xdg_wm_listener = {
.ping = host_xdg_wm_ping,
};
static void host_resize(int width, int height) {
if (width < 50) width = 50;
if (height < 50) height = 50;
if (width == host.width && height == host.height) return;
host.width = width;
host.height = height;
if (host.egl_window)
wl_egl_window_resize(host.egl_window, width, height, 0, 0);
if (host.egl_ok) {
eglMakeCurrent(host.egl_display, host.egl_surface, host.egl_surface,
host.egl_context);
}
/* Allocate the new swapchain here rather than lazily at render time:
the GBM allocation can take longer than a compositor's configure
response deadline, and the first frame at this size must be on the
wire before that deadline expires. */
swapchain_resize(width, height);
output_resize(width, height);
kick_request_redraw();
}
/* Tear down the nested window: drop the libdecor frame (and its decoration
subsurfaces) and the content surface. Only called from the exit paths, so
no ack/commit dance is needed. */
static void host_teardown_window(void) {
if (host.use_libdecor) {
if (host.frame) {
libdecor_frame_unref(host.frame);
host.frame = NULL;
}
} else {
if (host.toplevel) {
xdg_toplevel_destroy(host.toplevel);
host.toplevel = NULL;
}
if (host.xdg_surface) {
xdg_surface_destroy(host.xdg_surface);
host.xdg_surface = NULL;
}
}
if (host.surface) {
wl_surface_destroy(host.surface);
host.surface = NULL;
}
}
/* ---- Direct-xdg host-window path (SSD compositors: labwc/sway/KDE) ----
Kick owns the shell objects and acks configure events immediately -- the
arrangement that predates libdecor, where fullscreen state application
cannot be anchored to stale geometry because no set_window_geometry hint
is ever sent and the ack precedes every commit. */
static void host_xdg_surface_configure(void *data, struct xdg_surface *s,
uint32_t serial)
{
(void)data;
xdg_surface_ack_configure(s, serial);
}
static const struct xdg_surface_listener host_xdg_surface_listener = {
.configure = host_xdg_surface_configure,
};
static void host_xdg_toplevel_configure(void *data, struct xdg_toplevel *t,
int32_t width, int32_t height,
struct wl_array *states)
{
(void)data; (void)t;
host.fullscreen = false;
uint32_t *state;
wl_array_for_each(state, states)
if (*state == XDG_TOPLEVEL_STATE_FULLSCREEN)
host.fullscreen = true;
/* Mirror the host window's state onto the clients: fullscreen begets
fullscreen, anything else begets maximized. */
if (host.fullscreen != server.clients_fullscreen) {
kick_log(KICK_LOG_INFO, "host fullscreen=%d\n", host.fullscreen);
clients_set_fullscreen(host.fullscreen);
}
if (width > 0 && height > 0)
host_resize(width, height);
host.configured = true;
}
/* Common quit tail for the user-requested exits: drop the host window
(nested; guarded no-op standalone), tear every client and window down,
and exit cleanly. */
static void do_quit(void) {
host_teardown_window();
shutdown_cleanup();
exit(0);
}
/* Show or dismiss the confirm-before-quit modal. The panel is drawn by the
same second pass as the Alt overlay, so the same dance applies: while it
is up, direct scanout must yield to the composite path (attach-render
lock) and the swapchain buffers must be forced to repaint, or the modal
would bake into a reused buffer like the overlay does. */
static void set_confirm_quit(bool on) {
if (on == confirm_quit_pending) return;
confirm_quit_pending = on;
if (server.output)
wlr_output_lock_attach_render(server.output,
on || host.overlay_visible);
if (server.standalone)
standalone_overlay_damage();
else if (server.scene_output)
wlr_damage_ring_add_whole(&server.scene_output->damage_ring);
kick_request_redraw();
}
/* A quit was requested (host window close, or Ctrl+Alt+Q). With more than
one live window quitting would lose work, so raise the confirm modal and
wait for Y/N; a single window (or none) has nothing to lose and quits
straight away. */
static void quit_requested(void) {
int n = live_window_count();
kick_log(KICK_LOG_INFO, "kick: quit requested (%d window%s)\n",
n, n == 1 ? "" : "s");
if (n <= 1) {
do_quit();
return;
}
kick_log(KICK_LOG_INFO, "[confirm] quit: %d windows open "
"(Y=quit, N=cancel)\n", n);
set_confirm_quit(true);
}
static void host_xdg_toplevel_close(void *data, struct xdg_toplevel *t) {
(void)data; (void)t;
kick_log(KICK_LOG_INFO, "kick: window closed\n");
quit_requested();
}
static const struct xdg_toplevel_listener host_xdg_toplevel_listener = {
.configure = host_xdg_toplevel_configure,
.close = host_xdg_toplevel_close,
};
static void host_decoration_configure(void *data,
struct zxdg_toplevel_decoration_v1 *dec,
uint32_t mode)
{
(void)data; (void)dec;
kick_log(KICK_LOG_INFO, "kick: host decoration mode=%u (%s)\n",
mode,
mode == ZXDG_TOPLEVEL_DECORATION_V1_MODE_SERVER_SIDE
? "server-side" : "client-side");
}
static const struct zxdg_toplevel_decoration_v1_listener
host_decoration_listener = {
.configure = host_decoration_configure,
};
static void host_frame_configure(struct libdecor_frame *frame,
struct libdecor_configuration *config,
void *data)
{
(void)data;
int width = 0, height = 0;
bool size_ok =
libdecor_configuration_get_content_size(config, frame, &width, &height);
if (!size_ok) {
/* The initial configure commonly offers no size (the compositor
lets a CSD client pick one). The old xdg_toplevel configure
handler also treated 0x0 as "keep the current size": commit the
current layout anyway so libdecor gets a real sized configure
once we present a buffer. */
width = host.width;
height = host.height;
}
enum libdecor_window_state state = 0;
bool have_state = libdecor_configuration_get_window_state(config, &state);
if (have_state) {
bool fs = (state & LIBDECOR_WINDOW_STATE_FULLSCREEN) != 0;
if (fs != host.fullscreen) {
kick_log(KICK_LOG_INFO, "host fullscreen=%d\n", fs);
clients_set_fullscreen(fs);
}
host.fullscreen = fs;
}
/* libdecor reports the *content* size; the host window wraps that content
with its decorations. The content is exactly our wlr output. */
if (width > 0 && height > 0)
host_resize(width, height);
host.configured = true;
struct libdecor_state *st = libdecor_state_new(width, height);
libdecor_frame_commit(frame, st, config);
libdecor_state_free(st);
/* Do not follow the ack with a bare commit when the configure carried a
real size: that commit would apply the acked state (e.g. fullscreen)
using the still-attached previous frame, and labwc anchors the new
layout to that stale geometry -- the enlarged image lands at the old
origin with black margins top/left, cropped bottom/right. Skipping
it lets the next rendered frame apply the state at the correct size,
like every ordinary EGL client. The empty commit stays for the
size-less initial configure, where there is no state transition to
corrupt and libdecor needs the commit to get mapped. */
if (!size_ok && host.surface)
wl_surface_commit(host.surface);
/* labwc arms a 100 ms "did not respond" timer when it sends a configure;
on expiry it applies the move but keeps the old size -- the misplaced
fullscreen. Two measures keep us inside that deadline:
1. push the ack out immediately instead of waiting for the
end-of-loop flush;
2. render and present one frame at the new size right here, so a
correctly sized commit reaches labwc long before the timer fires
(commits sent before the ack are harmless -- they cannot apply
the new state -- and the first commit after the ack is the next
paced frame, already fresh). */
/* Push the ack out immediately instead of waiting for the
end-of-loop flush: labwc arms a 100 ms response deadline when it
sends a configure, and on expiry it applies the move while keeping
the old size -- the misplaced-fullscreen symptom. */
wl_display_flush(host.display);
}
static void host_frame_close(struct libdecor_frame *frame, void *data) {
(void)frame; (void)data;
kick_log(KICK_LOG_INFO, "kick: window closed\n");
quit_requested();
}
static void host_frame_commit(struct libdecor_frame *frame, void *data) {
/* Decoration via (synchronous) subsurfaces: libdecor asks us to commit the
content surface so the decoration appears atomically with the content. */
(void)frame; (void)data;
if (host.surface)
wl_surface_commit(host.surface);
}
static struct libdecor_frame_interface host_frame_iface = {
.configure = host_frame_configure,
.close = host_frame_close,
.commit = host_frame_commit,
};
static void host_libdecor_error(struct libdecor *ctx, enum libdecor_error error,
const char *message)
{
(void)ctx;
fprintf(stderr, "kick: libdecor error %d: %s\n", (int)error,
message ? message : "(null)");
}
static struct libdecor_interface host_libdecor_iface = {
.error = host_libdecor_error,
};
/* ---------- host keyboard ---------- */
/* (Re)build the xkb_state used to translate raw evdev keycodes into
keysyms for host hotkey matching. The state is derived from whatever
keymap is current (host-provided or fallback), so the hotkeys work on
any keyboard/layout without hardcoded keycodes. */
static void xkb_state_reload(void)
{
if (server.xkb_state) {
xkb_state_unref(server.xkb_state);
server.xkb_state = NULL;
}
if (!server.xkb_keymap)
return;
server.xkb_state = xkb_state_new(server.xkb_keymap);
server.xkb_prefix_mod = xkb_keymap_mod_get_index(server.xkb_keymap,
tab_prefix == PREFIX_SUPER ? XKB_PREFIX_MOD4_NAME
: XKB_MOD_NAME_ALT);
kick_log(KICK_LOG_DEBUG, "kick: prefix modifier index=%u "
"(%s)\n", (unsigned)server.xkb_prefix_mod,
tab_prefix == PREFIX_SUPER ? "Super/Mod4" : "Alt");
}
static void host_kbd_keymap(void *data, struct wl_keyboard *kbd, uint32_t format,
int32_t fd, uint32_t size)
{
(void)data; (void)kbd;
if (format != WL_KEYBOARD_KEYMAP_FORMAT_XKB_V1 || size == 0 || !server.xkb_ctx) {
close(fd);
return;
}
kick_log(KICK_LOG_DEBUG, "kick: host keymap: format=%u size=%u\n",
format, size);
/* The keymap is an shm file (size includes the trailing NUL), so mmap it
like wlroots' own clients do; fall back to a plain read loop. */
char *buf = mmap(NULL, size, PROT_READ, MAP_PRIVATE, fd, 0);
bool mapped = buf != MAP_FAILED;
size_t total = mapped ? size : 0;
if (!mapped) {
buf = malloc(size + 1);
if (!buf) {
close(fd);
return;
}
while (total < size) {
ssize_t rd = read(fd, buf + total, size - total);
if (rd > 0) {
total += rd;
} else if (rd < 0 && (errno == EAGAIN || errno == EINTR)) {
struct timespec ts = { .tv_sec = 0, .tv_nsec = 1000000 };
nanosleep(&ts, NULL);
} else {
break;
}
}
buf[total] = '\0';
if (total < size)
kick_log(KICK_LOG_DEBUG,
"kick: host keymap: short read %zu/%u bytes\n",
total, size);
}
struct xkb_keymap *km = xkb_keymap_new_from_string(
server.xkb_ctx, buf, XKB_KEYMAP_FORMAT_TEXT_V1, 0);
if (km) {
wlr_keyboard_set_keymap(&server.keyboard, km);
if (server.xkb_keymap)
xkb_keymap_unref(server.xkb_keymap);
server.xkb_keymap = km;
xkb_state_reload();
kick_log(KICK_LOG_DEBUG, "kick: host keymap parsed OK\n");
} else {
kick_log(KICK_LOG_INFO, "kick: failed to parse host "
"keymap (%u bytes); keeping fallback keymap\n", size);
if (kick_log_level() >= KICK_LOG_DEBUG) {
char hex[129];
size_t n = total < 64 ? total : 64;
for (size_t i = 0; i < n; i++)
snprintf(hex + i * 2, sizeof(hex) - i * 2, "%02x",
(unsigned char)buf[i]);
kick_log(KICK_LOG_DEBUG, "kick: keymap head (%zu/%u "
"bytes): %s\n", n, size, hex);
}
}
if (mapped)
munmap(buf, size);
else
free(buf);
close(fd);
}
static void host_kbd_enter(void *data, struct wl_keyboard *kbd, uint32_t serial,
struct wl_surface *surface, struct wl_array *keys)
{
(void)data; (void)kbd; (void)surface; (void)keys;
/* Remember the enter serial for host clipboard set_selection. Only the
focus-based wl_data_device backend can hold a stale echo guard (a
set_selection sent with a no-longer-valid serial gets no reply): drop it
on refocus there. The data-control backend echoes independently of
focus, so its in-flight guard must be preserved here, or the host's echo
of our own set_selection is mistaken for a real selection and mirrored
back into an endless set_selection/receive loop. */
bridge.kbd_serial = serial;
if (bridge.backend == BRIDGE_BACKEND_WL_DATA_DEVICE) {
bridge.dc_pending_echo = false;
bridge.dd_pending_echo = false;
}
if (bridge.host_set_pending && server.seat->selection_source &&
server.seat->selection_source->impl != &bridge_inner_source_impl) {
bridge.host_set_pending = false;
bridge_host_set_selection(server.seat->selection_source);
}
kick_log(KICK_LOG_DEBUG, "[kbd] enter surface=%p serial=%u active=%p\n",
(void *)surface, serial, (void *)active_toplevel());
struct kick_window *w = tab_current_window(server.active_tab);
if (w && w->toplevel)
wlr_seat_keyboard_notify_enter(server.seat,
w->toplevel->base->surface, server.keyboard.keycodes,
server.keyboard.num_keycodes, &server.keyboard.modifiers);
}
static void host_kbd_leave(void *data, struct wl_keyboard *kbd, uint32_t serial,
struct wl_surface *surface)
{
(void)data; (void)kbd; (void)serial; (void)surface;
kick_log(KICK_LOG_DEBUG, "[kbd] leave surface=%p serial=%u\n",
(void *)surface, serial);
wlr_seat_keyboard_notify_clear_focus(server.seat);
}
/* Temporary grey-band diagnosis: dump the scene buffer (client content as
wlroots rendered it) to /tmp/scene_N.ppm. The buffer memory is top-down,
XRGB8888. */
static void dump_scene_buffer(struct wlr_buffer *buf) {
if (!buf) return;
void *data;
uint32_t format;
size_t stride;
if (!wlr_buffer_begin_data_ptr_access(buf, WLR_BUFFER_DATA_PTR_ACCESS_READ,
&data, &format, &stride)) {
kick_log(KICK_LOG_INFO, "[dump] scene buffer not CPU-readable "
"(%dx%d)\n", buf->width, buf->height);
return;
}
/* [diag] classify the buffer: count non-black pixels so we can tell
"client painted nothing" from "we failed to import". */
int w = buf->width, h = buf->height;
unsigned long nonblack = 0, lum = 0;
unsigned char *p = data;
for (int y = 0; y < h; y++) {
unsigned char *row = p + (size_t)y * stride;
for (int x = 0; x < w; x++) {
uint32_t b = row[x*4+0];
unsigned long v = b + row[x*4+1] + row[x*4+2];
lum += v;
if (v > 12) nonblack++;
}
}
kick_log(KICK_LOG_INFO, "[dump] scene %dx%d fmt=0x%x "
"nonblack=%lu/%lu mean=%lu\n", w, h, format, nonblack,
(unsigned long)w * h, lum / ((unsigned long)w * h + 1));
char path[64];
snprintf(path, sizeof(path), "/tmp/scene_%d.ppm", dump_seq);
FILE *f = fopen(path, "wb");
if (f) {
int w = buf->width, h = buf->height;
fprintf(f, "P6\n%d %d\n255\n", w, h);
unsigned char *p = data;
for (int y = 0; y < h; y++) {
unsigned char *row = p + (size_t)y * stride;
for (int x = 0; x < w; x++) {
fputc(row[x*4+0], f);
fputc(row[x*4+1], f);
fputc(row[x*4+2], f);
}
}
fclose(f);
kick_log(KICK_LOG_INFO, "[dump] scene buffer -> %s (%dx%d, "
"fmt=0x%x)\n", path, w, h, format);
}
wlr_buffer_end_data_ptr_access(buf);
dump_seq++;
}
/* Dump what we are about to present to the host (our composited back buffer).
Must be called with the host EGL context current and back buffer freshly
drawn. GL readback is bottom-up, so flip vertically. */
static void dump_host_back(void) {
int w = host.width, h = host.height;
unsigned char *px = malloc((size_t)w * h * 4);
if (!px) return;
/* The blit draws are queued on the GPU; without a finish the readback can
race the previous frame's swap and return stale/mid-clear content. */
glFinish();
glReadPixels(0, 0, w, h, GL_RGBA, GL_UNSIGNED_BYTE, px);
unsigned long nonblack = 0, lum = 0;
for (int y = 0; y < h * w; y++) {
unsigned long v = px[y*4+0] + px[y*4+1] + px[y*4+2];
lum += v;
if (v > 12) nonblack++;
}
kick_log(KICK_LOG_INFO, "[dump] host %dx%d nonblack=%lu/%lu mean=%lu\n",
w, h, nonblack, (unsigned long)w * h,
lum / ((unsigned long)w * h + 1));
char path[64];
snprintf(path, sizeof(path), "/tmp/host_%d.ppm", dump_seq);
FILE *f = fopen(path, "wb");
if (f) {
fprintf(f, "P6\n%d %d\n255\n", w, h);
for (int y = h - 1; y >= 0; y--) {
unsigned char *row = px + (size_t)y * w * 4;
for (int x = 0; x < w; x++) {
fputc(row[x*4+0], f);
fputc(row[x*4+1], f);
fputc(row[x*4+2], f);
}
}
fclose(f);
kick_log(KICK_LOG_INFO, "[dump] host back buffer -> %s (%dx%d)\n",
path, w, h);
}
free(px);
dump_seq++;
}
/* Dump the standalone frame buffer as it will be presented (scene + overlay
composited by the wlroots renderer). With a GLES2 renderer we glReadPixels
the buffer's FBO in the wlroots EGL context; otherwise fall back to a CPU
read (e.g. the shm-backed buffers of the pixman renderer). Uses the same
"[dump] host back buffer ->" message as the nested dump so tests can parse
either mode with one helper. */
static void dump_standalone_buffer(struct wlr_buffer *buf) {
int w = buf->width, h = buf->height;
unsigned char *px = malloc((size_t)w * h * 4);
if (!px) return;
bool flip = false;
struct wlr_egl *egl = wlr_gles2_renderer_get_egl(server.renderer);
GLuint fbo = egl ? wlr_gles2_renderer_get_buffer_fbo(server.renderer, buf)
: 0;
EGLDisplay d = egl ? wlr_egl_get_display(egl) : EGL_NO_DISPLAY;
EGLContext c = egl ? wlr_egl_get_context(egl) : EGL_NO_CONTEXT;
if (d != EGL_NO_DISPLAY && c != EGL_NO_CONTEXT && fbo) {
eglMakeCurrent(d, EGL_NO_SURFACE, EGL_NO_SURFACE, c);
glBindFramebuffer(GL_FRAMEBUFFER, fbo);
glPixelStorei(GL_PACK_ALIGNMENT, 1);
glReadPixels(0, 0, w, h, GL_RGBA, GL_UNSIGNED_BYTE, px);
glBindFramebuffer(GL_FRAMEBUFFER, 0);
eglMakeCurrent(d, EGL_NO_SURFACE, EGL_NO_SURFACE, EGL_NO_CONTEXT);
flip = true;
} else {
void *data;
uint32_t format;
size_t stride;
if (!wlr_buffer_begin_data_ptr_access(buf,
WLR_BUFFER_DATA_PTR_ACCESS_READ, &data, &format, &stride)) {
free(px);
kick_log(KICK_LOG_INFO,
"[dump] standalone buffer not CPU-readable\n");
return;
}
for (int y = 0; y < h; y++)
memcpy(px + (size_t)y * w * 4, data + (size_t)y * stride,
(size_t)w * 4);
wlr_buffer_end_data_ptr_access(buf);
}
unsigned long nonblack = 0, lum = 0;
for (int y = 0; y < h * w; y++) {
unsigned long v = px[y*4+0] + px[y*4+1] + px[y*4+2];
lum += v;
if (v > 12) nonblack++;
}
kick_log(KICK_LOG_INFO, "[dump] host %dx%d nonblack=%lu/%lu mean=%lu\n",
w, h, nonblack, (unsigned long)w * h,
lum / ((unsigned long)w * h + 1));
char path[64];
snprintf(path, sizeof(path), "/tmp/host_%d.ppm", dump_seq);
FILE *f = fopen(path, "wb");
if (f) {
fprintf(f, "P6\n%d %d\n255\n", w, h);
for (int y = 0; y < h; y++) {
int sy = flip ? h - 1 - y : y;
unsigned char *row = px + (size_t)sy * w * 4;
for (int x = 0; x < w; x++) {
fputc(row[x*4+0], f);
fputc(row[x*4+1], f);
fputc(row[x*4+2], f);
}
}
fclose(f);
kick_log(KICK_LOG_INFO, "[dump] host back buffer -> %s (%dx%d)\n",
path, w, h);
if (server.cursor)
kick_log(KICK_LOG_INFO,
"[dump] cursor at (%f,%f)\n", server.cursor->x, server.cursor->y);
}
free(px);
dump_seq++;
}
/* KICK_SYNTH_INPUT=1: ignore the real host keyboard entirely and accept
input only from the stdin event feed (the test/driver channel). The host
keyboard listener stays attached (its enter/leave events still drive the
clipboard bridge), but key and modifier events from the real host are
dropped so a stray physical press can't cancel a synthesized repeat or
clobber the injected modifier state. */
static bool synth_input_only;
/* Forward declarations for the shared handlers (defined just below
host_kbd_key / host_ptr_motion). */
static bool process_key_event(uint32_t time, uint32_t key, uint32_t state,
uint32_t mods_depressed);
static void process_modifiers(uint32_t mods_depressed, uint32_t mods_latched,
uint32_t mods_locked, uint32_t group);
static void host_ptr_motion(uint32_t time, double sx, double sy);
/* Touch delivery shared by native touchscreens, the nested host forwarder
and the ctl feed. `action` is a KICK_TOUCH_* value; (ox,oy) are
output-local pixels. */
enum kick_touch_action { KICK_TOUCH_UP = 0, KICK_TOUCH_DOWN = 1,
KICK_TOUCH_MOTION = 2 };
static void seat_touch_deliver(uint32_t time_msec, int32_t id, int action,
double ox, double oy);
static void host_kbd_key(void *data, struct wl_keyboard *kbd, uint32_t serial,
uint32_t time, uint32_t key, uint32_t state)
{
(void)data;
if (synth_input_only && kbd)
return;
(void)kbd;
bridge.kbd_serial = serial;
if (!process_key_event(time, key, state, host.host_mods_depressed)) {
/* forward the key to our clients, like a native device would */
if (im_grab_forward_key(time, key, state))
return;
struct wlr_keyboard_key_event event = {
.time_msec = time,
.keycode = key,
.update_state = true,
.state = state,
};
wlr_keyboard_notify_key(&server.keyboard, &event);
wlr_seat_set_keyboard(server.seat, &server.keyboard);
wlr_seat_keyboard_notify_key(server.seat, time, key, state);
}
}
/* Standalone overlay visibility. The overlay is drawn into the scene output
buffer outside the scene graph, so the scene's damage trackers never learn
about its pixels; a swapchain buffer reused after the overlay was drawn
keeps the stale overlay baked in unless we force a repaint on transition.
Bumping the sentinel rect's size routes through wlr_scene_rect_set_size ->
wlr_scene_node_update() with NULL damage, which re-damages the node's whole
populated "visible" region, so both swapchain slots repaint within the next
two frames: the overlay fully appears on press and fully clears on release. */
static void standalone_overlay_damage(void) {
if (!server.output || !server.overlay_damage_rect) return;
struct wlr_scene_rect *r = server.overlay_damage_rect;
/* The sentinel's "visible" region is only kept populated while it is the
topmost sibling (the scene's damage traversal walks children in reverse
z-order, and an opaque client surface above it would empty the shared
update region before the sentinel is visited). Raise it, so the reorder
traversal populates its full-screen visible region, then bump its size
to re-damage that whole region; restore the z-order immediately so the
always-enabled transparent rect never intercepts pointer hit-testing. */
wlr_scene_node_raise_to_top(&r->node);
wlr_scene_rect_set_size(r, r->width, r->height - 1);
wlr_scene_rect_set_size(r, r->width, r->height);
wlr_scene_node_lower_to_bottom(&r->node);
}
/* Repaint the overlay in place when its content may have changed but no
pixel damage was produced -- a client's title/app_id protocol events carry
no surface change, so nothing else schedules a frame. No-op unless the
overlay is currently shown, so it costs nothing in normal use. */
static void overlay_refresh_if_visible(void) {
if (!host.overlay_visible) return;
if (server.standalone) standalone_overlay_damage();
kick_request_redraw();
}
/* set_title / set_app_id for xdg toplevels: refresh the overlay and push the
new title/app_id onto the taskbar handles. The event's data is the
toplevel, from which we recover the owning window. */
static void handle_window_meta(struct wl_listener *l, void *data) {
(void)l;
struct wlr_xdg_toplevel *toplevel = data;
struct kick_window *w = window_for_toplevel(toplevel);
overlay_refresh_if_visible();
if (w) {
foreign_sync_title(w);
foreign_sync_app_id(w);
}
}
static void update_overlay_visible(bool alt) {
if (alt == host.overlay_visible) return;
host.overlay_visible = alt;
/* The overlay draws as a second pass on top of the composited frame, so
while it is visible direct scanout must yield to the composite path:
an attach-render lock makes wlroots' per-frame scanout eligibility
check fail for exactly as long as the lock is held, and re-enables
scanout automatically the moment it is released. (The same lock/
unlock pattern labwc uses for its own panels.) */
if (server.output)
wlr_output_lock_attach_render(server.output, alt);
/* The overlay is baked into the scene output's swapchain buffers in both
modes now, so a transition must force those buffers to repaint from
clean scene content: standalone via its sentinel-rect damage trick,
nested via a whole-ring damage (its window blit no longer redraws the
overlay away -- it just copies whatever the buffer holds). */
if (server.standalone)
standalone_overlay_damage();
else if (server.scene_output)
wlr_damage_ring_add_whole(&server.scene_output->damage_ring);
kick_request_redraw();
}
/* handle_new_output() forces software cursors on every standalone output, so
the pointer is always composited into our frame by the scene renderer --
which only repaints where the frame was damaged. Cursor motion damages the
*output*, not the scene, so force whole-output damage on every move or the
pointer would never be painted. */
static void standalone_cursor_motion(struct wl_listener *listener, void *data) {
(void)listener; (void)data;
if (server.standalone)
standalone_overlay_damage();
}
static struct wl_listener standalone_cursor_motion_listener = {
.notify = standalone_cursor_motion,
};
/* Is the configured tab-management prefix (Alt, or Super/Mod4 with
--modifier super) currently pressed? Uses the xkb modifier index when a
keymap is compiled; with no keymap (xkb init failed) it falls back to the
raw wl_keyboard modifier bit: mod1/alt = 1<<3, mod4/super = 1<<6. */
static bool prefix_active(uint32_t mods_depressed) {
if (server.xkb_state)
return xkb_state_mod_index_is_active(server.xkb_state,
server.xkb_prefix_mod, XKB_STATE_MODS_EFFECTIVE);
return (mods_depressed & (tab_prefix == PREFIX_SUPER ? (1u << 6)
: (1u << 3))) != 0;
}
/* Shared key handling for both the host keyboard and native input devices:
tab-switch bindings + overlay visibility, with the caller forwarding the
key to the seat afterwards. `mods_depressed` uses the wl_keyboard modifier
layout (shift=1<<0, ctrl=1<<2, alt=1<<3). Returns true when the key was
consumed by a binding and must not be forwarded to the seat. */
static bool process_key_event(uint32_t time, uint32_t key, uint32_t state,
uint32_t mods_depressed)
{
(void)time;
if (server.idle_notifier)
wlr_idle_notifier_v1_notify_activity(server.idle_notifier, server.seat);
if (server.xkb_state)
xkb_state_update_key(server.xkb_state, key + 8,
state == WL_KEYBOARD_KEY_STATE_PRESSED
? XKB_KEY_DOWN : XKB_KEY_UP);
xkb_keysym_t sym = server.xkb_state
? xkb_state_key_get_one_sym(server.xkb_state, key + 8)
: XKB_KEY_NoSymbol;
/* With no compiled keymap (xkb init failed) fall back to the raw
evdev keycodes / modifier bits for the hotkey matching below. */
bool alt = prefix_active(mods_depressed);
if (alt != host.overlay_visible)
update_overlay_visible(alt);
bool ctrl = (mods_depressed & (1u << 2)) != 0;
char symbuf[32];
xkb_keysym_get_name(sym, symbuf, sizeof(symbuf));
kick_log(KICK_LOG_DEBUG,
"[kbd] key=%u state=%u sym=%s ctrl=%d alt=%d repeat_key=%u\n",
key, state, sym ? symbuf : "-",
(mods_depressed & (1u << 2)) != 0, alt, host.repeat_key);
/* Confirm-before-quit modal active: every key is swallowed so focused
clients never see them. Y/Enter quits on the press (the first press
only -- the exit runs before any repeat could re-fire); N/Escape
cancels, and repeats just re-cancel the already-cleared state. */
if (confirm_quit_pending) {
if (state == WL_KEYBOARD_KEY_STATE_PRESSED) {
bool yes = server.xkb_state
? (sym == XKB_KEY_y || sym == XKB_KEY_Y ||
sym == XKB_KEY_Return || sym == XKB_KEY_KP_Enter)
: (key == 21 || key == 28);
bool no = server.xkb_state
? (sym == XKB_KEY_n || sym == XKB_KEY_N ||
sym == XKB_KEY_Escape)
: (key == 49 || key == 1);
if (yes) {
kick_log(KICK_LOG_INFO, "kick: quit confirmed\n");
set_confirm_quit(false);
do_quit();
} else if (no) {
kick_log(KICK_LOG_INFO, "kick: quit cancelled\n");
set_confirm_quit(false);
}
}
return true;
}
/* Session locked: swallow every compositor grab chord so the user can't
cycle tabs, close windows or open terminals behind the lock screen
(passive keys still flow to the focused lock surface). The quit chord
and confirm modal above run first and remain available, as does the VT
switch below (a matching compositor session action). */
if (server.session_locked)
return true;
/* A focused surface with an active shortcuts inhibitor (game/VM) grabs
the compositor's chords: swallow the tab/window grabs so they reach
the client. Quit and VT switch above/below stay live. */
if (kb_inhibit_focused())
return true;
/* Ctrl+Alt+F1..F12 switch virtual terminals in standalone mode. wlroots
has no built-in handler; the compositor must notice the key and ask the
session (libseat/logind) to activate another VT. Both the press and
release are consumed so the focused client never sees the chord. */
if (server.standalone && server.session &&
sym >= XKB_KEY_XF86Switch_VT_1 &&
sym <= XKB_KEY_XF86Switch_VT_12) {
if (state == WL_KEYBOARD_KEY_STATE_PRESSED) {
unsigned vt = sym - XKB_KEY_XF86Switch_VT_1 + 1;
kick_log(KICK_LOG_INFO,
"kick: vt switch -> %u\n", vt);
wlr_session_change_vt(server.session, vt);
}
return true;
}
/* Function keys are not grabbed (prefix+F11 above is the one exception):
they pass through to the focused client, which may have its own
bindings (e.g. a browser's F11 fullscreen request, which
handle_request_fullscreen contains inside kick). Frame dumps are
available via SIGUSR1 instead. */
/* Alt+Up / Alt+Down cycle tabs. Grabbed so the focused client never
sees them. The host sends a single physical press, so repeats are
synthesized by kbd_repeat_start(); subsequent host presses of an
already-held key are ignored so a host-sent repeat never cycles twice.
Plain arrow keys (not Fn+arrow) are used because many laptop firmware
swallow Alt+Fn+PageUp (the Fn key reports as XF86WakeUp there), which
makes Alt+PageUp/PageDown unreliable. */
bool prev, next;
if (server.xkb_state) {
prev = sym == XKB_KEY_Up;
next = sym == XKB_KEY_Down;
} else {
prev = key == 103;
next = key == 108;
}
/* Alt+Shift+Up / Alt+Shift+Down move the active tab within the overlay
list (wrapping at the ends), without switching the active surface.
Checked before the plain Alt+arrow cycle below so Shift always means
"reorder, don't switch"; hold to keep moving via kbd_repeat_start.
Grabbed so the focused client never sees the chord (a terminal would
otherwise act on Shift+arrow). */
bool shift = (mods_depressed & (1u << 0)) != 0;
if (alt && shift && (prev || next)) {
if (state == WL_KEYBOARD_KEY_STATE_PRESSED) {
if (host.repeat_key != key) {
int dir = next ? 1 : -1;
reorder_active_tab(dir);
kbd_repeat_start(key, dir, REPEAT_REORDER);
}
} else {
kbd_repeat_cancel();
}
return true;
}
if (alt && (prev || next)) {
if (state == WL_KEYBOARD_KEY_STATE_PRESSED) {
if (host.repeat_key != key) {
int dir = next ? 1 : -1;
cycle_tab(dir);
kbd_repeat_start(key, dir, REPEAT_CYCLE);
}
} else {
kbd_repeat_cancel();
}
return true;
}
/* Alt+Left / Alt+Right rotate the active tab's windows: Right
steps forward to the next window, Left steps backward to the previous
one, wrapping at the ends. Grabbed (consumed) so the focused client
never sees the chord -- a terminal would otherwise act on Left/Right.
When the tab has a single window the chord is still consumed as a
no-op so Alt+arrow never leaks to the client. */
{
bool left = server.xkb_state ? (sym == XKB_KEY_Left) : (key == 105);
bool right = server.xkb_state ? (sym == XKB_KEY_Right) : (key == 106);
if (alt && !shift && (left || right)) {
if (state == WL_KEYBOARD_KEY_STATE_PRESSED) {
if (host.repeat_key != key) {
int dir = right ? 1 : -1;
cycle_tab_windows(server.active_tab, dir);
kbd_repeat_start(key, dir, REPEAT_SUBCYCLE);
}
} else {
kbd_repeat_cancel();
}
return true;
}
}
/* Alt+Shift+Left / Alt+Shift+Right move the current window within its
tab's window list -- the window analogue of Alt+Shift+Up/Down tab
reordering. Wraps at the ends. Grabbed so terminals never see
Shift+arrow, and it summons the overlay like every other navigation
chord (the reordered rows are the visible effect). With two windows
the move still visibly swaps the two overlay rows, so there is no
dead zone at n==2. */
{
bool mleft = server.xkb_state ? (sym == XKB_KEY_Left) : (key == 105);
bool mright = server.xkb_state ? (sym == XKB_KEY_Right) : (key == 106);
if (alt && shift && (mleft || mright)) {
if (state == WL_KEYBOARD_KEY_STATE_PRESSED) {
update_overlay_visible(true);
if (host.repeat_key != key) {
int dir = mright ? 1 : -1;
struct kick_window *w = tab_current_window(server.active_tab);
if (w)
reorder_window(w, dir);
kbd_repeat_start(key, dir, REPEAT_MEMBER_MOVE);
}
} else {
kbd_repeat_cancel();
}
return true;
}
}
/* Ctrl+Alt+Q quits kick (both the host close and this chord share
quit_requested): with more than one window open a modal asks before
anything is torn down. Grabbed so the focused client never sees the
chord; a latch drops host-synthesized repeats so one hold can't fire
the request (or the confirm) more than once. */
{ bool is_q = server.xkb_state
? (sym == XKB_KEY_q || sym == XKB_KEY_Q)
: key == 16;
if (alt && ctrl && is_q) {
kbd_repeat_cancel();
if (state == WL_KEYBOARD_KEY_STATE_PRESSED) {
if (!quit_key_held) {
quit_key_held = true;
quit_requested();
}
} else {
quit_key_held = false;
}
return true;
}
}
/* prefix+Delete closes the active window (or the whole tab when it is the
only window). Grabbed so the focused client never sees the key; a latch
drops host-synthesized repeats so one hold can't fire it per repeat.
When the whole tab closes, the active surface moves to the right
neighbor inside close_tab(), so the tab is gone this frame even before
the client process exits. */
{ bool is_delete = server.xkb_state
? (sym == XKB_KEY_Delete)
: key == 111;
if (alt && is_delete) {
kbd_repeat_cancel();
if (state == WL_KEYBOARD_KEY_STATE_PRESSED) {
if (!delete_key_held) {
delete_key_held = true;
close_active_window();
}
} else {
delete_key_held = false;
}
return true;
}
}
/* Alt+Shift+T opens a new terminal tab ($TERMINAL, default alacritty).
The tab is inserted right after the current one and becomes active when
it maps. Grabbed so the focused client never sees the chord; a latch
drops host-synthesized repeats so one hold can't open a terminal per
repeat. */
{
bool is_t = server.xkb_state
? (sym == XKB_KEY_t || sym == XKB_KEY_T)
: key == 20;
if (alt && shift && is_t) {
kbd_repeat_cancel();
if (state == WL_KEYBOARD_KEY_STATE_PRESSED) {
if (!term_key_held) {
term_key_held = true;
if (!cmd_in_path(term_cmd)) {
kick_log(KICK_LOG_INFO,
"kick: '%s' not found in PATH; "
"no terminal opened (set $TERMINAL)\n",
term_cmd);
} else {
add_tab(term_cmd);
}
}
} else {
term_key_held = false;
}
return true;
}
}
/* prefix+F11 toggles the kick window's fullscreen state in the host
compositor. The libdecor configure that comes back updates every
client via the usual host->clients propagation, exactly as if the
host compositor had fullscreened us. Grabbed so the focused client
never sees the chord; a latch drops host-synthesized repeats so one
hold can't flip-flop the toggle. A no-op standalone (no host
window); plain unprefixed F11 still passes through below. */
{ bool is_f11 = server.xkb_state
? (sym == XKB_KEY_F11)
: key == 87;
if (alt && is_f11) {
kbd_repeat_cancel();
if (state == WL_KEYBOARD_KEY_STATE_PRESSED) {
if (!f11_key_held) {
f11_key_held = true;
host_toggle_fullscreen();
}
} else {
f11_key_held = false;
}
return true;
}
}
/* any other key activity stops the tab-switch repeat */
kbd_repeat_cancel();
return false;
}
/* Shared modifier handling for the host keyboard and native devices. */
static void process_modifiers(uint32_t mods_depressed, uint32_t mods_latched,
uint32_t mods_locked, uint32_t group)
{
host.host_mods_depressed = mods_depressed;
if (server.xkb_state)
xkb_state_update_mask(server.xkb_state, mods_depressed,
mods_latched, mods_locked, group, group, group);
bool alt = prefix_active(mods_depressed);
if (alt != host.overlay_visible)
update_overlay_visible(alt);
if (host.repeat_key && !alt)
kbd_repeat_cancel();
}
static void host_kbd_modifiers(void *data, struct wl_keyboard *kbd, uint32_t serial,
uint32_t mods_depressed, uint32_t mods_latched,
uint32_t mods_locked, uint32_t group)
{
(void)data; (void)serial;
if (synth_input_only && kbd)
return;
(void)kbd;
process_modifiers(mods_depressed, mods_latched, mods_locked, group);
wlr_keyboard_notify_modifiers(&server.keyboard, mods_depressed,
mods_latched, mods_locked, group);
if (im_grab_forward_modifiers(&server.keyboard))
return;
wlr_seat_keyboard_notify_modifiers(server.seat, &server.keyboard.modifiers);
}
static void host_kbd_repeat_info(void *data, struct wl_keyboard *kbd,
int32_t rate, int32_t delay)
{
(void)data; (void)kbd;
wlr_keyboard_set_repeat_info(&server.keyboard, rate, delay);
}
static const struct wl_keyboard_listener host_kbd_listener = {
.keymap = host_kbd_keymap,
.enter = host_kbd_enter,
.leave = host_kbd_leave,
.key = host_kbd_key,
.modifiers = host_kbd_modifiers,
.repeat_info = host_kbd_repeat_info,
};
/* ============ Standalone native input devices ============
In standalone mode real keyboard/pointer devices come from the backend
(libinput). Their events are routed through the same hotkey logic and are
then forwarded into the shared seat keyboard exactly like host input.
The keyboard listeners are per-device (one struct standalone_kbdev per
libinput keyboard): ending a single global slot makes modifier state come
from whichever device attached last (often an HDMI-CEC or consumer-control
node), so Shift held on the real keyboard never reached the seat. */
static void standalone_kbd_key(struct wl_listener *listener, void *data) {
struct standalone_kbdev *kd = wl_container_of(listener, kd, key);
struct wlr_keyboard_key_event *ev = data;
uint32_t mods = wlr_keyboard_get_modifiers(kd->keyboard);
if (!process_key_event(ev->time_msec, ev->keycode, ev->state, mods)) {
if (im_grab_forward_key(ev->time_msec, ev->keycode, ev->state))
return;
wlr_seat_set_keyboard(server.seat, kd->keyboard);
wlr_seat_keyboard_notify_key(server.seat, ev->time_msec, ev->keycode,
ev->state);
}
}
static void standalone_kbd_modifiers(struct wl_listener *listener, void *data) {
(void)data;
struct standalone_kbdev *kd = wl_container_of(listener, kd, modifiers);
struct wlr_keyboard *kb = kd->keyboard;
process_modifiers(kb->modifiers.depressed, kb->modifiers.latched,
kb->modifiers.locked, kb->modifiers.group);
wlr_seat_set_keyboard(server.seat, kb);
if (im_grab_forward_modifiers(kb))
return;
wlr_seat_keyboard_notify_modifiers(server.seat, &kb->modifiers);
}
/* The device is going away (libinput suspends all devices when the session
loses its VT). Drop our listeners so wlr_keyboard_finish's assert that
every event list is empty holds, then free the struct. wlroots emits the
input device's destroy signal from within wlr_keyboard_finish(), so this
runs before the assert. */
static void standalone_kbd_destroy(struct wl_listener *listener, void *data) {
(void)data;
struct standalone_kbdev *kd = wl_container_of(listener, kd, destroy);
wl_list_remove(&kd->destroy.link);
wl_list_remove(&kd->key.link);
wl_list_remove(&kd->modifiers.link);
wl_list_remove(&kd->link);
free(kd);
}
/* Forward the wlr_cursor's position to the seat as the effect/click point.
wlroots is the single source of truth for where the pointer is: it clamps
cursor->x/y against the output layout (wlr_cursor_warp_closest), so the
visible arrow and the coordinates forwarded here stay in the same space,
even when a requested --screen-mode mode differs from the geometry the
output layout derives from the committed state. Never hand-clamp a second
copy. */
static void standalone_forward_pointer(uint32_t time) {
struct wlr_output *output = server.output;
if (!server.cursor || !output) return;
double x = server.cursor->x;
double y = server.cursor->y;
wlr_output_layout_output_coords(server.output_layout, output, &x, &y);
host_ptr_motion(time, x, y);
}
/* Shared standalone pointer-motion handling, used by both the libinput device
listeners and the stdin ctl feed (which has no device, hence NULL). The
wlr_cursor never moves on its own in wlroots 0.19 -- the device wiring only
re-emits motion on cursor->events.motion -- so every relative delta must be
turned into wlr_cursor_move() or the visible pointer stays pinned while the
seat (and therefore client hover) keeps moving. With a NULL device the move
falls back to the output layout's closest-point mapping. */
/* ---------- pointer constraints + relative pointer ---------- */
/* Forward a relative pointer delta to clients (zwp_relative_pointer_v1).
The manager scopes delivery to clients that bound it on the seat. */
static void send_relative_motion(uint32_t time_msec, double dx, double dy) {
if (!server.relative_pointer_mgr || !server.seat) return;
kick_log(KICK_LOG_INFO, "[relative] motion dx=%d dy=%d\n",
(int)dx, (int)dy);
wlr_relative_pointer_manager_v1_send_relative_motion(
server.relative_pointer_mgr, server.seat,
(uint64_t)time_msec * 1000, dx, dy, dx, dy);
}
/* Find the scene origin (in scene/layout coordinates) of a surface's buffer
node, so a constraint region in surface-local space can be mapped to the
output. Surfaces live under per-app scene trees, so the walk is
recursive. */
static bool scene_surface_origin_in(struct wlr_scene_tree *tree,
struct wlr_surface *surface,
double *ox, double *oy) {
struct wlr_scene_node *node;
wl_list_for_each(node, &tree->children, link) {
if (node->type == WLR_SCENE_NODE_BUFFER) {
struct wlr_scene_buffer *sb = wlr_scene_buffer_from_node(node);
struct wlr_scene_surface *ss = wlr_scene_surface_try_from_buffer(sb);
if (ss && ss->surface == surface) {
int lx = 0, ly = 0;
if (!wlr_scene_node_coords(node, &lx, &ly)) return false;
*ox = (double)lx;
*oy = (double)ly;
return true;
}
} else if (node->type == WLR_SCENE_NODE_TREE) {
if (scene_surface_origin_in(wlr_scene_tree_from_node(node),
surface, ox, oy))
return true;
}
}
return false;
}
static bool scene_surface_origin(struct wlr_surface *surface,
double *ox, double *oy) {
return scene_surface_origin_in(&server.scene->tree, surface, ox, oy);
}
static void constraint_deactivate(void) {
if (!server.active_constraint) return;
wlr_pointer_constraint_v1_send_deactivated(server.active_constraint);
wl_list_remove(&server.constraint_destroy.link);
server.active_constraint = NULL;
}
static void handle_constraint_destroy(struct wl_listener *listener, void *data) {
(void)data;
struct kick_server *s = wl_container_of(listener, s, constraint_destroy);
s->active_constraint = NULL;
}
static void constraint_activate(struct wlr_surface *surface) {
if (!server.pointer_constraints || !surface) return;
struct wlr_pointer_constraint_v1 *c = wlr_pointer_constraints_v1_constraint_for_surface(
server.pointer_constraints, surface, server.seat);
if (!c) return;
server.active_constraint = c;
if (!scene_surface_origin(surface, &server.constraint_ox, &server.constraint_oy)) {
server.constraint_ox = 0.0;
server.constraint_oy = 0.0;
}
server.lock_x = server.last_ptr_x;
server.lock_y = server.last_ptr_y;
server.constraint_destroy.notify = handle_constraint_destroy;
wl_signal_add(&c->events.destroy, &server.constraint_destroy);
wlr_pointer_constraint_v1_send_activated(c);
if (c->type == WLR_POINTER_CONSTRAINT_V1_LOCKED)
kick_log(KICK_LOG_INFO, "[constraint] locked on surface\n");
else
kick_log(KICK_LOG_INFO, "[constraint] confined on surface\n");
}
/* Focus change is the only place the pointer's surface can change, so it is
the natural point to swap the active constraint. */
static void handle_seat_pointer_focus(struct wl_listener *listener, void *data) {
(void)listener;
struct wlr_seat_pointer_focus_change_event *ev = data;
constraint_deactivate();
if (ev->new_surface)
constraint_activate(ev->new_surface);
}
/* ===================== Text input + input method (OSK/IME) =================
Local-only relay between the focused tab's text-input fields
(zwp_text_input_v3, e.g. toolkit entries) and an in-session input method
(zwp_input_method_v2, e.g. fcitx5). The seat's keyboard focus is the single
source of truth: text-input objects get enter/leave as focus moves, the
focused field's surrounding-text/content-type go to the IME, and the IME's
preedit/commit strings go back to the field. While the IME holds its
keyboard grab, keys bypass the seat and are sent to the grab instead (the
tab-management chords in process_key_event still run first, so the user
can always cycle away). IME candidate popups render into
server.input_popup_tree, above the tab trees. */
struct kick_text_input {
struct wlr_text_input_v3 *ti;
struct wl_listener enable;
struct wl_listener commit;
struct wl_listener disable;
struct wl_listener destroy;
};
struct kick_input_method {
struct wlr_input_method_v2 *im;
struct wl_listener commit;
struct wl_listener new_popup;
struct wl_listener grab_keyboard;
struct wl_listener destroy;
struct wl_list link; /* server.input_methods */
};
struct kick_input_popup {
struct wlr_input_popup_surface_v2 *popup;
struct wlr_scene_tree *scene;
struct wl_listener destroy;
struct wl_listener commit;
struct wl_list link; /* server.input_popups */
};
/* The input method currently available (the first bound one; a session runs
a single IME). Tracked in our own wrapper list: the manager's
input_methods nodes are the wl_resources' links, not the
wlr_input_method_v2 structs' own, so container_of on them is garbage. */
static struct wlr_input_method_v2 *active_input_method(void) {
if (wl_list_empty(&server.input_methods))
return NULL;
struct kick_input_method *kim = wl_container_of(
server.input_methods.next, kim, link);
return kim->im;
}
/* The text input entered on the keyboard-focused surface, if any. */
static struct wlr_text_input_v3 *focused_text_input(void) {
struct wlr_surface *focused = server.seat->keyboard_state.focused_surface;
if (!focused || !server.text_input_mgr)
return NULL;
struct wlr_text_input_v3 *ti;
wl_list_for_each(ti, &server.text_input_mgr->text_inputs, link) {
if (ti->focused_surface == focused)
return ti;
}
return NULL;
}
/* Forward the focused field's state to the IME. Only the features the field
actually committed are sent; the change cause + done always complete the
sequence so the IME never waits on a half-applied state. */
static void relay_text_input_to_im(struct wlr_text_input_v3 *ti) {
struct wlr_input_method_v2 *im = active_input_method();
if (!im)
return;
if ((ti->current.features &
WLR_TEXT_INPUT_V3_FEATURE_SURROUNDING_TEXT) &&
ti->current.surrounding.text)
wlr_input_method_v2_send_surrounding_text(im,
ti->current.surrounding.text, ti->current.surrounding.cursor,
ti->current.surrounding.anchor);
if (ti->current.features & WLR_TEXT_INPUT_V3_FEATURE_CONTENT_TYPE)
wlr_input_method_v2_send_content_type(im,
ti->current.content_type.hint, ti->current.content_type.purpose);
wlr_input_method_v2_send_text_change_cause(im,
ti->current.text_change_cause);
wlr_input_method_v2_send_done(im);
kick_log(KICK_LOG_DEBUG, "[im] field -> IME (done)\n");
}
/* Forward the IME's pending strings to the focused field. */
static void relay_im_to_text_input(struct wlr_input_method_v2 *im) {
struct wlr_text_input_v3 *ti = focused_text_input();
if (!ti)
return;
if (im->current.preedit.text)
wlr_text_input_v3_send_preedit_string(ti, im->current.preedit.text,
im->current.preedit.cursor_begin, im->current.preedit.cursor_end);
if (im->current.commit_text)
wlr_text_input_v3_send_commit_string(ti, im->current.commit_text);
if (im->current.delete.before_length || im->current.delete.after_length)
wlr_text_input_v3_send_delete_surrounding_text(ti,
im->current.delete.before_length, im->current.delete.after_length);
wlr_text_input_v3_send_done(ti);
kick_log(KICK_LOG_DEBUG, "[im] IME -> field (done)\n");
}
/* Tell the IME where the focused field's cursor sits (output pixels), so its
candidate popup lands next to the caret. The cursor rectangle is
surface-local; scene_surface_origin() maps the surface into the scene. */
static void im_send_cursor_rectangles(void) {
struct wlr_input_method_v2 *im = active_input_method();
struct wlr_text_input_v3 *ti = focused_text_input();
if (!im || !ti || wl_list_empty(&im->popup_surfaces))
return;
if (!(ti->current.features & WLR_TEXT_INPUT_V3_FEATURE_CURSOR_RECTANGLE))
return;
struct wlr_box rect = ti->current.cursor_rectangle;
double ox, oy;
if (ti->focused_surface && scene_surface_origin(ti->focused_surface,
&ox, &oy)) {
rect.x += (int)ox;
rect.y += (int)oy;
}
struct wlr_input_popup_surface_v2 *popup;
wl_list_for_each(popup, &im->popup_surfaces, link)
wlr_input_popup_surface_v2_send_text_input_rectangle(popup, &rect);
}
static void handle_text_input_enable(struct wl_listener *listener,
void *data) {
struct kick_text_input *kti = wl_container_of(listener, kti, enable);
struct wlr_text_input_v3 *ti = data;
(void)ti;
kick_log(KICK_LOG_DEBUG, "[im] text input enabled\n");
if (kti->ti == focused_text_input()) {
struct wlr_input_method_v2 *im = active_input_method();
if (im)
wlr_input_method_v2_send_activate(im);
relay_text_input_to_im(kti->ti);
im_send_cursor_rectangles();
}
}
static void handle_text_input_commit(struct wl_listener *listener,
void *data) {
struct kick_text_input *kti = wl_container_of(listener, kti, commit);
struct wlr_text_input_v3 *ti = data;
(void)ti;
if (kti->ti == focused_text_input()) {
relay_text_input_to_im(kti->ti);
im_send_cursor_rectangles();
}
}
static void handle_text_input_disable(struct wl_listener *listener,
void *data) {
struct kick_text_input *kti = wl_container_of(listener, kti, disable);
(void)data;
kick_log(KICK_LOG_DEBUG, "[im] text input disabled\n");
if (kti->ti == focused_text_input()) {
struct wlr_input_method_v2 *im = active_input_method();
if (im)
wlr_input_method_v2_send_deactivate(im);
}
}
static void handle_text_input_destroy(struct wl_listener *listener,
void *data) {
struct kick_text_input *kti = wl_container_of(listener, kti, destroy);
(void)data;
wl_list_remove(&kti->enable.link);
wl_list_remove(&kti->commit.link);
wl_list_remove(&kti->disable.link);
wl_list_remove(&kti->destroy.link);
free(kti);
}
static void handle_text_input_new(struct wl_listener *listener, void *data) {
(void)listener;
struct wlr_text_input_v3 *ti = data;
struct kick_text_input *kti = calloc(1, sizeof(*kti));
if (!kti)
return;
kti->ti = ti;
kti->enable.notify = handle_text_input_enable;
wl_signal_add(&ti->events.enable, &kti->enable);
kti->commit.notify = handle_text_input_commit;
wl_signal_add(&ti->events.commit, &kti->commit);
kti->disable.notify = handle_text_input_disable;
wl_signal_add(&ti->events.disable, &kti->disable);
kti->destroy.notify = handle_text_input_destroy;
wl_signal_add(&ti->events.destroy, &kti->destroy);
/* The field may belong to the already-focused surface (bound late); enter
it right away so it can enable without waiting for a focus switch. */
struct wlr_surface *focused = server.seat->keyboard_state.focused_surface;
if (focused && ti->focused_surface == NULL &&
wl_resource_get_client(ti->resource) ==
wl_resource_get_client(focused->resource))
wlr_text_input_v3_send_enter(ti, focused);
}
static void handle_input_method_commit(struct wl_listener *listener,
void *data) {
struct kick_input_method *kim = wl_container_of(listener, kim, commit);
struct wlr_input_method_v2 *im = data;
(void)im;
kick_log(KICK_LOG_DEBUG, "[im] IME commit\n");
relay_im_to_text_input(kim->im);
}
static void handle_input_popup_commit(struct wl_listener *listener,
void *data) {
struct kick_input_popup *pop = wl_container_of(listener, pop, commit);
(void)data;
im_send_cursor_rectangles();
kick_request_redraw();
}
static void handle_input_popup_destroy(struct wl_listener *listener,
void *data) {
struct kick_input_popup *pop = wl_container_of(listener, pop, destroy);
(void)data;
wl_list_remove(&pop->destroy.link);
wl_list_remove(&pop->commit.link);
wl_list_remove(&pop->link);
if (pop->scene)
wlr_scene_node_destroy(&pop->scene->node);
free(pop);
kick_request_redraw();
}
static void handle_input_method_new_popup(struct wl_listener *listener,
void *data) {
struct kick_input_method *kim = wl_container_of(listener, kim, new_popup);
(void)kim;
struct wlr_input_popup_surface_v2 *popup = data;
struct kick_input_popup *pop = calloc(1, sizeof(*pop));
if (!pop)
return;
pop->popup = popup;
/* Plain surface with possible subsurfaces: a subsurface tree renders the
buffer and its children without any xdg positioning. */
pop->scene = wlr_scene_subsurface_tree_create(server.input_popup_tree,
popup->surface);
pop->destroy.notify = handle_input_popup_destroy;
wl_signal_add(&popup->events.destroy, &pop->destroy);
pop->commit.notify = handle_input_popup_commit;
wl_signal_add(&popup->surface->events.commit, &pop->commit);
wl_list_insert(&server.input_popups, &pop->link);
im_send_cursor_rectangles();
kick_request_redraw();
kick_log(KICK_LOG_INFO, "[im] IME popup opened\n");
}
static void handle_input_method_grab_keyboard(struct wl_listener *listener,
void *data) {
struct kick_input_method *kim = wl_container_of(listener, kim,
grab_keyboard);
(void)kim;
struct wlr_input_method_keyboard_grab_v2 *grab = data;
/* Give the IME our keymap/repeat info so it interprets grabbed keys. */
struct wlr_keyboard *kb = wlr_seat_get_keyboard(server.seat);
if (!kb)
kb = &server.keyboard;
wlr_input_method_keyboard_grab_v2_set_keyboard(grab, kb);
kick_log(KICK_LOG_INFO, "[im] IME grabbed keyboard\n");
}
static void handle_input_method_destroy(struct wl_listener *listener,
void *data) {
struct kick_input_method *kim = wl_container_of(listener, kim, destroy);
(void)data;
wl_list_remove(&kim->commit.link);
wl_list_remove(&kim->new_popup.link);
wl_list_remove(&kim->grab_keyboard.link);
wl_list_remove(&kim->destroy.link);
wl_list_remove(&kim->link);
free(kim);
kick_log(KICK_LOG_INFO, "[im] input method gone\n");
}
static void handle_input_method_new(struct wl_listener *listener,
void *data) {
(void)listener;
struct wlr_input_method_v2 *im = data;
struct kick_input_method *kim = calloc(1, sizeof(*kim));
if (!kim)
return;
kim->im = im;
kim->commit.notify = handle_input_method_commit;
wl_signal_add(&im->events.commit, &kim->commit);
kim->new_popup.notify = handle_input_method_new_popup;
wl_signal_add(&im->events.new_popup_surface, &kim->new_popup);
kim->grab_keyboard.notify = handle_input_method_grab_keyboard;
wl_signal_add(&im->events.grab_keyboard, &kim->grab_keyboard);
kim->destroy.notify = handle_input_method_destroy;
wl_signal_add(&im->events.destroy, &kim->destroy);
wl_list_insert(&server.input_methods, &kim->link);
kick_log(KICK_LOG_INFO, "[im] input method ready\n");
/* An IME binding late still learns the focused field immediately. */
struct wlr_text_input_v3 *ti = focused_text_input();
if (ti && ti->current_enabled) {
wlr_input_method_v2_send_activate(im);
relay_text_input_to_im(ti);
} else {
wlr_input_method_v2_send_deactivate(im);
}
}
/* Keyboard focus moved: leave the old surface's fields, enter the new
surface's same-client fields, and (de)activate the IME. This single hook
covers every focus path (tab switches, maps, lock, layer focus). */
static void handle_seat_keyboard_focus(struct wl_listener *listener,
void *data) {
(void)listener;
struct wlr_seat_keyboard_focus_change_event *ev = data;
if (server.text_input_mgr) {
struct wlr_text_input_v3 *ti;
wl_list_for_each(ti, &server.text_input_mgr->text_inputs, link) {
if (ev->old_surface && ti->focused_surface == ev->old_surface)
wlr_text_input_v3_send_leave(ti);
}
if (ev->new_surface) {
wl_list_for_each(ti, &server.text_input_mgr->text_inputs, link) {
if (ti->focused_surface == NULL &&
wl_resource_get_client(ti->resource) ==
wl_resource_get_client(ev->new_surface->resource))
wlr_text_input_v3_send_enter(ti, ev->new_surface);
}
}
}
struct wlr_input_method_v2 *im = active_input_method();
if (im) {
struct wlr_text_input_v3 *ti = focused_text_input();
if (ti && ti->current_enabled) {
wlr_input_method_v2_send_activate(im);
relay_text_input_to_im(ti);
im_send_cursor_rectangles();
} else {
wlr_input_method_v2_send_deactivate(im);
}
}
}
/* The IME's keyboard grab, when held, receives keys/modifiers instead of the
seat's focused client. */
static struct wlr_input_method_keyboard_grab_v2 *im_grab(void) {
struct wlr_input_method_v2 *im = active_input_method();
return im ? im->keyboard_grab : NULL;
}
static bool im_grab_forward_key(uint32_t time, uint32_t key, uint32_t state) {
struct wlr_input_method_keyboard_grab_v2 *grab = im_grab();
if (!grab)
return false;
wlr_input_method_keyboard_grab_v2_send_key(grab, time, key, state);
return true;
}
static bool im_grab_forward_modifiers(struct wlr_keyboard *kb) {
struct wlr_input_method_keyboard_grab_v2 *grab = im_grab();
if (!grab || !kb)
return false;
wlr_input_method_keyboard_grab_v2_send_modifiers(grab, &kb->modifiers);
return true;
}
/* ===================== xdg-dialog (modal toplevels) =================
A modal dialog demands attention: when it maps (or is set modal while
mapped) its tab is shown and it takes window focus, even under the
no-steal rule and even with --tab-groups off (where it still owns its
own tab, so it stays individually reachable). Placement itself is
untouched: ancestry grouping stacks it with --tab-groups on exactly as
before. Session lock still wins (set_active_tab/window_enter refuse
while locked). */
/* Show the modal's tab (unless already shown) and focus the dialog. */
static void modal_activate(struct kick_window *w) {
if (!w || !w->mapped || !w->modal)
return;
if (w->tab != server.active_tab)
set_active_tab(w->tab);
window_enter(w);
kick_log(KICK_LOG_INFO, "[dialog] modal app=%d\n", tab_index(w->tab));
}
static void dialog_unwire(struct kick_window *w) {
if (!w || !w->dialog_wired)
return;
wl_list_remove(&w->dialog_set_modal.link);
wl_list_remove(&w->dialog_destroy.link);
w->dialog_wired = false;
w->dialog = NULL;
w->modal = false;
}
static void handle_dialog_set_modal(struct wl_listener *listener,
void *data) {
struct kick_window *w = wl_container_of(listener, w, dialog_set_modal);
(void)data; /* wlroots emits NULL; the object lives on the window. */
if (!w->dialog)
return;
w->modal = w->dialog->modal;
kick_log(KICK_LOG_DEBUG, "[dialog] modal=%d app=%d\n",
w->modal, tab_index(w->tab));
if (w->modal && w->mapped)
modal_activate(w);
}
static void handle_dialog_destroy(struct wl_listener *listener, void *data) {
struct kick_window *w = wl_container_of(listener, w, dialog_destroy);
(void)data;
dialog_unwire(w);
}
/* Mirror an xdg_dialog_v1 object onto its window. The object may appear
before claim (same commit as the toplevel), between claim and map, or
long after mapping -- so claim, manager-new-dialog and map all funnel
here. Re-wiring replaces a dead object when the client makes a second
one for the same toplevel. */
static void dialog_wire(struct kick_window *w,
struct wlr_xdg_dialog_v1 *dialog) {
if (!w || !dialog)
return;
dialog_unwire(w);
w->dialog = dialog;
w->modal = dialog->modal;
w->dialog_set_modal.notify = handle_dialog_set_modal;
wl_signal_add(&dialog->events.set_modal, &w->dialog_set_modal);
w->dialog_destroy.notify = handle_dialog_destroy;
wl_signal_add(&dialog->events.destroy, &w->dialog_destroy);
w->dialog_wired = true;
kick_log(KICK_LOG_DEBUG, "[dialog] wired modal=%d app=%d\n",
w->modal, tab_index(w->tab));
}
static void handle_dialog_new(struct wl_listener *listener, void *data) {
(void)listener;
struct wlr_xdg_dialog_v1 *dialog = data;
struct kick_window *w = window_for_toplevel(dialog->xdg_toplevel);
if (!w)
return;
dialog_wire(w, dialog);
if (w->modal && w->mapped)
modal_activate(w);
}
/* Clamp an absolute pointer position to whatever the active constraint
allows, in place. LOCKED pins to the lock position; CONFINED keeps the
pointer inside the constraint region (empty region = whole surface). */
static void constraint_filter_abs(double *x, double *y) {
struct wlr_pointer_constraint_v1 *c = server.active_constraint;
if (!c) return;
struct wlr_surface *surface = c->surface;
if (c->type == WLR_POINTER_CONSTRAINT_V1_LOCKED) {
*x = server.lock_x;
*y = server.lock_y;
return;
}
int w = surface->current.width;
int h = surface->current.height;
if (w <= 0 || h <= 0) return;
int x1 = 0, y1 = 0, x2 = w, y2 = h;
if (pixman_region32_not_empty(&c->region)) {
pixman_box32_t *ext = pixman_region32_extents(&c->region);
x1 = ext->x1;
y1 = ext->y1;
x2 = ext->x2;
y2 = ext->y2;
if (x2 > w) x2 = w;
if (y2 > h) y2 = h;
}
if (x1 >= x2) x1 = x2 - 1;
if (y1 >= y2) y1 = y2 - 1;
double lx = *x - server.constraint_ox;
double ly = *y - server.constraint_oy;
if (lx < x1) lx = x1;
else if (lx >= x2) lx = x2 - 1;
if (ly < y1) ly = y1;
else if (ly >= y2) ly = y2 - 1;
*x = server.constraint_ox + lx;
*y = server.constraint_oy + ly;
}
static void native_ptr_motion(uint32_t time, struct wlr_input_device *dev,
double dx, double dy) {
if (!server.cursor) return;
if (server.idle_notifier)
wlr_idle_notifier_v1_notify_activity(server.idle_notifier, server.seat);
send_relative_motion(time, dx, dy);
wlr_cursor_move(server.cursor, dev, dx, dy);
/* Keep the visible arrow inside the active constraint's region (or
pinned, when locked). wlr_cursor is the source of truth for the
position, so clamp it rather than forwarding a second copy. */
if (server.active_constraint) {
double x = server.cursor->x, y = server.cursor->y;
constraint_filter_abs(&x, &y);
/* Re-warp through wlroots so the output cursor (the rendered arrow)
follows: writing cursor->x/y directly would leave it behind. */
if (x != server.cursor->x || y != server.cursor->y)
wlr_cursor_warp(server.cursor, NULL, x, y);
}
standalone_forward_pointer(time);
}
static void native_ptr_abs(uint32_t time, struct wlr_input_device *dev,
double x, double y) {
if (!server.cursor) return;
wlr_cursor_warp_absolute(server.cursor, dev, x, y);
standalone_forward_pointer(time);
}
/* Native touchscreen events: warp the (invisible) cursor to the normalized
absolute position so the rest of the pipeline -- layout coords, constraint
clamping -- matches pointer semantics exactly, then deliver through the
shared seat path. */
static void standalone_touch_deliver_from(struct wlr_touch *touch,
uint32_t time_msec, int32_t id, int action, double x, double y) {
if (!server.cursor) return;
wlr_cursor_warp_absolute(server.cursor, &touch->base, x, y);
double ox = server.cursor->x, oy = server.cursor->y;
if (server.output)
wlr_output_layout_output_coords(server.output_layout,
server.output, &ox, &oy);
seat_touch_deliver(time_msec, id, action, ox, oy);
}
static void standalone_touch_down_event(struct wl_listener *listener,
void *data) {
struct standalone_touchdev *td =
wl_container_of(listener, td, down);
struct wlr_touch_down_event *ev = data;
standalone_touch_deliver_from(td->touch, ev->time_msec, ev->touch_id,
KICK_TOUCH_DOWN, ev->x, ev->y);
}
static void standalone_touch_motion_event(struct wl_listener *listener,
void *data) {
struct standalone_touchdev *td =
wl_container_of(listener, td, motion);
struct wlr_touch_motion_event *ev = data;
standalone_touch_deliver_from(td->touch, ev->time_msec, ev->touch_id,
KICK_TOUCH_MOTION, ev->x, ev->y);
}
static void standalone_touch_up_event(struct wl_listener *listener,
void *data) {
struct standalone_touchdev *td = wl_container_of(listener, td, up);
struct wlr_touch_up_event *ev = data;
seat_touch_deliver(ev->time_msec, ev->touch_id, KICK_TOUCH_UP, 0, 0);
}
static void standalone_touch_destroy(struct wl_listener *listener,
void *data) {
(void)data;
struct standalone_touchdev *td = wl_container_of(listener, td, destroy);
wl_list_remove(&td->link);
wl_list_remove(&td->down.link);
wl_list_remove(&td->motion.link);
wl_list_remove(&td->up.link);
wl_list_remove(&td->destroy.link);
free(td);
}
static void standalone_ptr_motion_event(struct wl_listener *listener, void *data) {
struct standalone_ptrdev *pd = wl_container_of(listener, pd, motion);
struct wlr_pointer_motion_event *ev = data;
native_ptr_motion(ev->time_msec,
(struct wlr_input_device *)&pd->pointer->base,
ev->delta_x, ev->delta_y);
}
static void standalone_ptr_abs_event(struct wl_listener *listener, void *data) {
struct standalone_ptrdev *pd = wl_container_of(listener, pd, motion_absolute);
struct wlr_pointer_motion_absolute_event *ev = data;
native_ptr_abs(ev->time_msec,
(struct wlr_input_device *)&pd->pointer->base,
ev->x, ev->y);
}
/* ===================== Pointer gestures =====================
Touchpad swipe/pinch/hold fan out to gesture clients holding seat
pointer focus (wlroots routes by focus; with no focused surface the
sends are no-ops). Both sources -- libinput devices in standalone
mode and the stdin test feed in any mode -- drive these shared
forwarders. Nested mode has no host gesture source (the host only
offers wl_pointer), so gestures there come from the feed alone. */
static void gesture_activity(void) {
if (server.idle_notifier && server.seat)
wlr_idle_notifier_v1_notify_activity(server.idle_notifier,
server.seat);
}
static void gesture_swipe_begin(uint32_t time, uint32_t fingers) {
if (!server.gestures || !server.seat) return;
gesture_activity();
wlr_pointer_gestures_v1_send_swipe_begin(server.gestures, server.seat,
time, fingers);
kick_log(KICK_LOG_DEBUG, "[gesture] swipe begin fingers=%u\n", fingers);
}
static void gesture_swipe_update(uint32_t time, uint32_t fingers,
double dx, double dy) {
if (!server.gestures || !server.seat) return;
gesture_activity();
wlr_pointer_gestures_v1_send_swipe_update(server.gestures, server.seat,
time, dx, dy);
kick_log(KICK_LOG_DEBUG, "[gesture] swipe update fingers=%u dx=%.1f dy=%.1f\n",
fingers, dx, dy);
}
static void gesture_swipe_end(uint32_t time, bool cancelled) {
if (!server.gestures || !server.seat) return;
gesture_activity();
wlr_pointer_gestures_v1_send_swipe_end(server.gestures, server.seat,
time, cancelled);
kick_log(KICK_LOG_DEBUG, "[gesture] swipe %s\n",
cancelled ? "cancelled" : "end");
}
static void gesture_pinch_begin(uint32_t time, uint32_t fingers) {
if (!server.gestures || !server.seat) return;
gesture_activity();
wlr_pointer_gestures_v1_send_pinch_begin(server.gestures, server.seat,
time, fingers);
kick_log(KICK_LOG_DEBUG, "[gesture] pinch begin fingers=%u\n", fingers);
}
static void gesture_pinch_update(uint32_t time, uint32_t fingers, double dx,
double dy, double scale, double rotation) {
if (!server.gestures || !server.seat) return;
gesture_activity();
wlr_pointer_gestures_v1_send_pinch_update(server.gestures, server.seat,
time, dx, dy,
scale, rotation);
kick_log(KICK_LOG_DEBUG, "[gesture] pinch update fingers=%u scale=%.2f rot=%.1f\n",
fingers, scale, rotation);
}
static void gesture_pinch_end(uint32_t time, bool cancelled) {
if (!server.gestures || !server.seat) return;
gesture_activity();
wlr_pointer_gestures_v1_send_pinch_end(server.gestures, server.seat,
time, cancelled);
kick_log(KICK_LOG_DEBUG, "[gesture] pinch %s\n",
cancelled ? "cancelled" : "end");
}
static void gesture_hold_begin(uint32_t time, uint32_t fingers) {
if (!server.gestures || !server.seat) return;
gesture_activity();
wlr_pointer_gestures_v1_send_hold_begin(server.gestures, server.seat,
time, fingers);
kick_log(KICK_LOG_DEBUG, "[gesture] hold begin fingers=%u\n", fingers);
}
static void gesture_hold_end(uint32_t time, bool cancelled) {
if (!server.gestures || !server.seat) return;
gesture_activity();
wlr_pointer_gestures_v1_send_hold_end(server.gestures, server.seat,
time, cancelled);
kick_log(KICK_LOG_DEBUG, "[gesture] hold %s\n",
cancelled ? "cancelled" : "end");
}
static void standalone_ptr_swipe_begin(struct wl_listener *listener,
void *data) {
(void)listener;
struct wlr_pointer_swipe_begin_event *ev = data;
gesture_swipe_begin(ev->time_msec, ev->fingers);
}
static void standalone_ptr_swipe_update(struct wl_listener *listener,
void *data) {
(void)listener;
struct wlr_pointer_swipe_update_event *ev = data;
gesture_swipe_update(ev->time_msec, ev->fingers, ev->dx, ev->dy);
}
static void standalone_ptr_swipe_end(struct wl_listener *listener,
void *data) {
(void)listener;
struct wlr_pointer_swipe_end_event *ev = data;
gesture_swipe_end(ev->time_msec, ev->cancelled);
}
static void standalone_ptr_pinch_begin(struct wl_listener *listener,
void *data) {
(void)listener;
struct wlr_pointer_pinch_begin_event *ev = data;
gesture_pinch_begin(ev->time_msec, ev->fingers);
}
static void standalone_ptr_pinch_update(struct wl_listener *listener,
void *data) {
(void)listener;
struct wlr_pointer_pinch_update_event *ev = data;
gesture_pinch_update(ev->time_msec, ev->fingers, ev->dx, ev->dy,
ev->scale, ev->rotation);
}
static void standalone_ptr_pinch_end(struct wl_listener *listener,
void *data) {
(void)listener;
struct wlr_pointer_pinch_end_event *ev = data;
gesture_pinch_end(ev->time_msec, ev->cancelled);
}
static void standalone_ptr_hold_begin(struct wl_listener *listener,
void *data) {
(void)listener;
struct wlr_pointer_hold_begin_event *ev = data;
gesture_hold_begin(ev->time_msec, ev->fingers);
}
static void standalone_ptr_hold_end(struct wl_listener *listener,
void *data) {
(void)listener;
struct wlr_pointer_hold_end_event *ev = data;
gesture_hold_end(ev->time_msec, ev->cancelled);
}
static void standalone_ptr_button_event(struct wl_listener *listener, void *data) {
(void)listener;
struct wlr_pointer_button_event *ev = data;
if (!server.seat) return;
if (server.idle_notifier)
wlr_idle_notifier_v1_notify_activity(server.idle_notifier, server.seat);
wlr_seat_pointer_notify_button(server.seat, ev->time_msec, ev->button,
ev->state);
wlr_seat_pointer_notify_frame(server.seat);
}
static void standalone_ptr_axis_event(struct wl_listener *listener, void *data) {
(void)listener;
struct wlr_pointer_axis_event *ev = data;
if (!server.seat) return;
wlr_seat_pointer_notify_axis(server.seat, ev->time_msec, ev->orientation,
ev->delta, ev->delta_discrete, ev->source,
WL_POINTER_AXIS_RELATIVE_DIRECTION_IDENTICAL);
wlr_seat_pointer_notify_frame(server.seat);
}
static void standalone_ptr_frame_event(struct wl_listener *listener, void *data) {
(void)listener; (void)data;
}
/* The device is going away (libinput suspends all devices when the session
loses its VT). Drop our listeners so wlr_pointer_finish's assert that
every event list is empty holds, then free the struct. */
static void standalone_ptr_destroy(struct wl_listener *listener, void *data) {
(void)data;
struct standalone_ptrdev *pd = wl_container_of(listener, pd, destroy);
wl_list_remove(&pd->destroy.link);
wl_list_remove(&pd->motion.link);
wl_list_remove(&pd->motion_absolute.link);
wl_list_remove(&pd->button.link);
wl_list_remove(&pd->axis.link);
wl_list_remove(&pd->frame.link);
wl_list_remove(&pd->swipe_begin.link);
wl_list_remove(&pd->swipe_update.link);
wl_list_remove(&pd->swipe_end.link);
wl_list_remove(&pd->pinch_begin.link);
wl_list_remove(&pd->pinch_update.link);
wl_list_remove(&pd->pinch_end.link);
wl_list_remove(&pd->hold_begin.link);
wl_list_remove(&pd->hold_end.link);
wl_list_remove(&pd->link);
free(pd);
}
static void handle_new_input(struct wl_listener *listener, void *data) {
(void)listener;
struct wlr_input_device *device = data;
switch (device->type) {
case WLR_INPUT_DEVICE_KEYBOARD: {
struct wlr_keyboard *kb = wlr_keyboard_from_input_device(device);
/* Without a keymap the device never emits modifier events; give it
ours so both the hotkeys and the seat work. */
if (server.xkb_keymap)
wlr_keyboard_set_keymap(kb, server.xkb_keymap);
struct standalone_kbdev *kd = calloc(1, sizeof(*kd));
if (!kd) break;
kd->keyboard = kb;
kd->key.notify = standalone_kbd_key;
wl_signal_add(&kb->events.key, &kd->key);
kd->modifiers.notify = standalone_kbd_modifiers;
wl_signal_add(&kb->events.modifiers, &kd->modifiers);
kd->destroy.notify = standalone_kbd_destroy;
wl_signal_add(&kb->base.events.destroy, &kd->destroy);
wl_list_insert(server.kbdevs.prev, &kd->link);
kick_log(KICK_LOG_INFO, "standalone: keyboard '%s'\n", device->name);
break;
}
case WLR_INPUT_DEVICE_POINTER: {
struct wlr_pointer *ptr = wlr_pointer_from_input_device(device);
if (server.cursor)
wlr_cursor_attach_input_device(server.cursor, device);
struct standalone_ptrdev *pd = calloc(1, sizeof(*pd));
if (!pd) break;
pd->pointer = ptr;
pd->motion.notify = standalone_ptr_motion_event;
wl_signal_add(&ptr->events.motion, &pd->motion);
pd->motion_absolute.notify = standalone_ptr_abs_event;
wl_signal_add(&ptr->events.motion_absolute, &pd->motion_absolute);
pd->button.notify = standalone_ptr_button_event;
wl_signal_add(&ptr->events.button, &pd->button);
pd->axis.notify = standalone_ptr_axis_event;
wl_signal_add(&ptr->events.axis, &pd->axis);
pd->frame.notify = standalone_ptr_frame_event;
wl_signal_add(&ptr->events.frame, &pd->frame);
pd->swipe_begin.notify = standalone_ptr_swipe_begin;
wl_signal_add(&ptr->events.swipe_begin, &pd->swipe_begin);
pd->swipe_update.notify = standalone_ptr_swipe_update;
wl_signal_add(&ptr->events.swipe_update, &pd->swipe_update);
pd->swipe_end.notify = standalone_ptr_swipe_end;
wl_signal_add(&ptr->events.swipe_end, &pd->swipe_end);
pd->pinch_begin.notify = standalone_ptr_pinch_begin;
wl_signal_add(&ptr->events.pinch_begin, &pd->pinch_begin);
pd->pinch_update.notify = standalone_ptr_pinch_update;
wl_signal_add(&ptr->events.pinch_update, &pd->pinch_update);
pd->pinch_end.notify = standalone_ptr_pinch_end;
wl_signal_add(&ptr->events.pinch_end, &pd->pinch_end);
pd->hold_begin.notify = standalone_ptr_hold_begin;
wl_signal_add(&ptr->events.hold_begin, &pd->hold_begin);
pd->hold_end.notify = standalone_ptr_hold_end;
wl_signal_add(&ptr->events.hold_end, &pd->hold_end);
pd->destroy.notify = standalone_ptr_destroy;
wl_signal_add(&ptr->base.events.destroy, &pd->destroy);
wl_list_insert(server.ptrdevs.prev, &pd->link);
kick_log(KICK_LOG_INFO, "standalone: pointer '%s'\n", device->name);
break;
}
case WLR_INPUT_DEVICE_TOUCH: {
struct wlr_touch *touch = wlr_touch_from_input_device(device);
if (server.cursor)
wlr_cursor_attach_input_device(server.cursor, device);
struct standalone_touchdev *td = calloc(1, sizeof(*td));
if (!td) break;
td->touch = touch;
td->down.notify = standalone_touch_down_event;
wl_signal_add(&touch->events.down, &td->down);
td->motion.notify = standalone_touch_motion_event;
wl_signal_add(&touch->events.motion, &td->motion);
td->up.notify = standalone_touch_up_event;
wl_signal_add(&touch->events.up, &td->up);
td->destroy.notify = standalone_touch_destroy;
wl_signal_add(&touch->base.events.destroy, &td->destroy);
wl_list_insert(server.touchdevs.prev, &td->link);
kick_log(KICK_LOG_INFO, "standalone: touch '%s'\n", device->name);
break;
}
default:
break;
}
}
/* ============ stdin event feed (test/driver channel) ============
Reads raw input events from stdin and dispatches them into the same
handlers a real device would drive, so the input paths stay under test.
Records (after the u8 command byte, u32s little-endian):
1 | u32 key | u32 state (WL_KEYBOARD_KEY_STATE_*)
2 | u32 mods | u32 latched | u32 locked | u32 group
3 | u32 x | u32 y (absolute output pixels)
4 | i32 dx | i32 dy (relative motion)
5 | u32 btn | u32 state (evdev button; 1 press / 0 release)
6 | u32 slot | u32 action | u32 x | u32 y
(touch: action 1 down / 2 motion / 0 up,
x,y absolute output pixels)
7 | u32 phase | u32 fingers | i32 dx | i32 dy
(swipe: phase 0 begin / 1 update /
2 end / 3 cancelled end)
8 | u32 phase | u32 fingers | i32 dx | i32 dy | i32 scale1000 |
i32 rot1000 (pinch: scale/rotation in thousandths;
phases as swipe)
9 | u32 phase | u32 fingers (hold: phase 0 begin / 1 end /
2 cancelled end)
*/
#define CTL_CMD_KEY 1
#define CTL_CMD_MODS 2
#define CTL_CMD_WARP 3
#define CTL_CMD_PTR_MOTION 4
#define CTL_CMD_PTR_BUTTON 5
#define CTL_CMD_TOUCH 6
#define CTL_CMD_SWIPE 7
#define CTL_CMD_PINCH 8
#define CTL_CMD_HOLD 9
#define CTL_MAX_MSG 32 /* pinch carries six u32s after padding */
#define CTL_BUF_SIZE 512
static uint32_t ctl_serial;
static uint32_t ctl_time;
static void ctl_dispatch(const uint8_t *msg, size_t len) {
uint32_t u32[6];
if (len < 5) return;
switch (msg[0]) {
case CTL_CMD_KEY:
if (len < 9) return;
memcpy(u32, msg + 1, 8);
ctl_time += 1;
host_kbd_key(NULL, NULL, ++ctl_serial, ctl_time, u32[0], u32[1]);
break;
case CTL_CMD_MODS:
if (len < 17) return;
memcpy(u32, msg + 1, 16);
ctl_time += 1;
host_kbd_modifiers(NULL, NULL, ++ctl_serial, u32[0], u32[1],
u32[2], u32[3]);
break;
case CTL_CMD_WARP:
if (len < 9) return;
memcpy(u32, msg + 1, 8);
ctl_time += 1;
/* Absolute standalone-output-pixel position, so tests can place the
visible cursor (wlr_cursor_warp with a NULL device). Warp doesn't
emit a motion event, so damage the scene here like motion would, and
forward the new position to the seat so the effect point stays where
the arrow lands. Nested mode has no wlr_cursor: feed the position
straight into the seat instead, so the ctl feed stays usable in both
modes (e.g. to give a client a pointer enter so it can request a
cursor shape). */
if (server.standalone) {
double wx = (double)u32[0], wy = (double)u32[1];
constraint_filter_abs(&wx, &wy);
wlr_cursor_warp(server.cursor, NULL, wx, wy);
standalone_forward_pointer(ctl_time);
standalone_overlay_damage();
} else {
host_ptr_motion(ctl_time, (double)u32[0], (double)u32[1]);
}
break;
case CTL_CMD_PTR_MOTION:
if (len < 9) return;
memcpy(u32, msg + 1, 8);
ctl_time += 1;
/* Relative delta through the same path a libinput pointer device
takes (native_ptr_motion -> wlr_cursor_move). With no device there
is no cursor->events.motion, so damage the scene explicitly. */
native_ptr_motion(ctl_time, NULL, (double)u32[0], (double)u32[1]);
if (server.standalone)
standalone_overlay_damage();
break;
case CTL_CMD_PTR_BUTTON:
if (len < 9) return;
memcpy(u32, msg + 1, 8);
ctl_time += 1;
/* Button press/release at the current pointer position, through the
same seat entry real devices use. Button codes are evdev-style
(BTN_LEFT = 0x110); state 1 = press, 0 = release. */
if (!server.seat) return;
wlr_seat_pointer_notify_button(server.seat, ctl_time,
u32[0], u32[1]);
wlr_seat_pointer_notify_frame(server.seat);
break;
case CTL_CMD_TOUCH:
if (len < 17) return;
memcpy(u32, msg + 1, 16);
ctl_time += 1;
/* Touch event at absolute output pixels, through the same delivery
path native devices and the nested forwarder use. */
seat_touch_deliver(ctl_time, (int32_t)u32[0],
u32[1] > 2 ? KICK_TOUCH_UP : (int)u32[1],
(double)(int32_t)u32[2],
(double)(int32_t)u32[3]);
break;
case CTL_CMD_SWIPE:
if (len < 17) return;
memcpy(u32, msg + 1, 16);
ctl_time += 1;
/* Touchpad swipe through the shared gesture forwarders. */
switch (u32[0]) {
case 0: gesture_swipe_begin(ctl_time, u32[1]); break;
case 1: gesture_swipe_update(ctl_time, u32[1],
(double)(int32_t)u32[2], (double)(int32_t)u32[3]); break;
case 2: gesture_swipe_end(ctl_time, false); break;
case 3: gesture_swipe_end(ctl_time, true); break;
}
break;
case CTL_CMD_PINCH:
if (len < 25) return;
memcpy(u32, msg + 1, 24);
ctl_time += 1;
/* Touchpad pinch; scale/rotation ride as thousandths. */
switch (u32[0]) {
case 0: gesture_pinch_begin(ctl_time, u32[1]); break;
case 1: gesture_pinch_update(ctl_time, u32[1],
(double)(int32_t)u32[2], (double)(int32_t)u32[3],
(double)(int32_t)u32[4] / 1000.0,
(double)(int32_t)u32[5] / 1000.0); break;
case 2: gesture_pinch_end(ctl_time, false); break;
case 3: gesture_pinch_end(ctl_time, true); break;
}
break;
case CTL_CMD_HOLD:
if (len < 9) return;
memcpy(u32, msg + 1, 8);
ctl_time += 1;
/* Touchpad hold through the shared gesture forwarders. */
switch (u32[0]) {
case 0: gesture_hold_begin(ctl_time, u32[1]); break;
case 1: gesture_hold_end(ctl_time, false); break;
case 2: gesture_hold_end(ctl_time, true); break;
}
break;
}
}
static int ctl_cb(int fd, uint32_t mask, void *data) {
static uint8_t buf[CTL_BUF_SIZE];
static size_t have = 0;
(void)data;
/* stdin closed: stop watching but keep the compositor running */
if (mask & (WL_EVENT_HANGUP | WL_EVENT_ERROR)) {
wl_event_source_remove(server.ctl_source);
server.ctl_source = NULL;
return 0;
}
ssize_t n = read(fd, buf + have, sizeof(buf) - have);
if (n <= 0) {
if (n == 0) {
wl_event_source_remove(server.ctl_source);
server.ctl_source = NULL;
}
return 0;
}
have += (size_t)n;
uint8_t msg[CTL_MAX_MSG];
while (have >= 5) {
/* MODS/SWIPE carry four u32s, TOUCH three, PINCH six after the
command byte; HOLD is a single u32 pair like the rest. */
size_t need = (buf[0] == CTL_CMD_MODS || buf[0] == CTL_CMD_TOUCH ||
buf[0] == CTL_CMD_SWIPE)
? 17
: buf[0] == CTL_CMD_PINCH ? 25
: 9;
if (have < need) break;
memcpy(msg, buf, need);
ctl_dispatch(msg, need);
memmove(buf, buf + need, have - need);
have -= need;
}
return 0;
}
/* ---------- host pointer ---------- */
static struct wlr_surface *surface_at(double x, double y,
double *sx, double *sy)
{
struct wlr_scene_node *node = wlr_scene_node_at(
&server.scene->tree.node, x, y, sx, sy);
if (node && node->type == WLR_SCENE_NODE_BUFFER) {
struct wlr_scene_buffer *buffer = wlr_scene_buffer_from_node(node);
struct wlr_scene_surface *scene_surface =
wlr_scene_surface_try_from_buffer(buffer);
if (scene_surface)
return scene_surface->surface;
}
return NULL;
}
/* Live touch slots kick originated (any source). On host cancel every
sequence ends with a clean up instead of stranding clients. */
#define KICK_TOUCH_MAX_SLOTS 16
static int32_t touch_slots[KICK_TOUCH_MAX_SLOTS];
static size_t touch_slot_count;
static void seat_touch_deliver(uint32_t time_msec, int32_t id, int action,
double ox, double oy) {
if (!server.seat) return;
if (server.idle_notifier)
wlr_idle_notifier_v1_notify_activity(server.idle_notifier, server.seat);
constraint_filter_abs(&ox, &oy);
switch (action) {
case KICK_TOUCH_DOWN: {
double nx = 0.0, ny = 0.0;
struct wlr_surface *surface = surface_at(ox, oy, &nx, &ny);
/* A down without a client surface underneath is dropped: touch
points stick to the surface they land on. */
if (surface) {
wlr_seat_touch_notify_down(server.seat, surface,
time_msec, id, nx, ny);
if (touch_slot_count < KICK_TOUCH_MAX_SLOTS)
touch_slots[touch_slot_count++] = id;
}
break;
}
case KICK_TOUCH_MOTION:
/* Motion routes to the point's original client; coordinates may
leave that surface while dragging. */
wlr_seat_touch_notify_motion(server.seat, time_msec, id, ox, oy);
break;
default: { /* KICK_TOUCH_UP */
wlr_seat_touch_notify_up(server.seat, time_msec, id);
for (size_t i = 0; i < touch_slot_count; i++)
if (touch_slots[i] == id) {
touch_slots[i] = touch_slots[--touch_slot_count];
break;
}
break;
}
}
wlr_seat_touch_notify_frame(server.seat);
}
/* End every live touch sequence with an up: the host cancelled (gesture
policy, session teardown) and clients must not wait forever. */
static void seat_touch_cancel_all(void) {
while (touch_slot_count > 0)
seat_touch_deliver(0, touch_slots[touch_slot_count - 1],
KICK_TOUCH_UP, 0, 0);
}
static void host_ptr_motion(uint32_t time, double sx, double sy) {
if (!server.seat) return;
if (server.idle_notifier)
wlr_idle_notifier_v1_notify_activity(server.idle_notifier, server.seat);
server.last_ptr_x = sx;
server.last_ptr_y = sy;
constraint_filter_abs(&sx, &sy);
double nx = 0.0, ny = 0.0;
struct wlr_surface *surface = surface_at(sx, sy, &nx, &ny);
if (surface) {
wlr_seat_pointer_notify_enter(server.seat, surface, nx, ny);
wlr_seat_pointer_notify_motion(server.seat, time, nx, ny);
} else {
wlr_seat_pointer_notify_clear_focus(server.seat);
/* Pointer over no nested surface (black tab): drop any client shape. */
apply_cursor_shape(WP_CURSOR_SHAPE_DEVICE_V1_SHAPE_DEFAULT);
}
wlr_seat_pointer_notify_frame(server.seat);
}
static void host_ptr_enter(void *data, struct wl_pointer *p, uint32_t serial,
struct wl_surface *surface, wl_fixed_t sx, wl_fixed_t sy)
{
(void)data; (void)p; (void)surface;
host.ptr_serial = serial;
host_ptr_motion(0, wl_fixed_to_double(sx), wl_fixed_to_double(sy));
}
static void host_ptr_leave(void *data, struct wl_pointer *p, uint32_t serial,
struct wl_surface *surface)
{
(void)data; (void)p; (void)serial; (void)surface;
if (server.seat) {
wlr_seat_pointer_notify_clear_focus(server.seat);
wlr_seat_pointer_notify_frame(server.seat);
}
}
static void host_ptr_motion_event(void *data, struct wl_pointer *p, uint32_t time,
wl_fixed_t sx, wl_fixed_t sy)
{
(void)data; (void)p;
double nx = wl_fixed_to_double(sx), ny = wl_fixed_to_double(sy);
/* Nested mode has no wlr_cursor: derive the relative delta from the
consecutive absolute host positions. (Standalone deltas are sent from
native_ptr_motion instead.) */
send_relative_motion(time, nx - server.last_ptr_x, ny - server.last_ptr_y);
host_ptr_motion(time, nx, ny);
}
static void host_ptr_button(void *data, struct wl_pointer *p, uint32_t serial,
uint32_t time, uint32_t button, uint32_t state)
{
(void)data; (void)p; (void)serial;
if (!server.seat) return;
if (server.idle_notifier)
wlr_idle_notifier_v1_notify_activity(server.idle_notifier, server.seat);
wlr_seat_pointer_notify_button(server.seat, time, button, state);
wlr_seat_pointer_notify_frame(server.seat);
}
static void host_ptr_axis(void *data, struct wl_pointer *p, uint32_t time,
uint32_t axis, wl_fixed_t value)
{
(void)data; (void)p;
if (!server.seat) return;
int32_t discrete = axis < 2 ? host.axis_discrete[axis] : 0;
host.axis_discrete[axis] = 0;
wlr_seat_pointer_notify_axis(server.seat, time, axis,
wl_fixed_to_double(value), discrete,
host.axis_source,
WL_POINTER_AXIS_RELATIVE_DIRECTION_IDENTICAL);
wlr_seat_pointer_notify_frame(server.seat);
}
static void host_ptr_axis_source(void *data, struct wl_pointer *p, uint32_t source)
{
(void)data; (void)p;
host.axis_source = source;
}
static void host_ptr_axis_discrete(void *data, struct wl_pointer *p, uint32_t axis,
int32_t discrete)
{
(void)data; (void)p;
if (axis < 2)
host.axis_discrete[axis] += discrete;
}
static void host_ptr_axis_stop(void *data, struct wl_pointer *p, uint32_t time,
uint32_t axis)
{
(void)data; (void)p; (void)time; (void)axis;
}
static void host_ptr_frame(void *data, struct wl_pointer *p) {
(void)data; (void)p;
}
static void host_touch_deliver(void *data, struct wl_touch *touch,
uint32_t time, int32_t id, wl_fixed_t fx,
wl_fixed_t fy, int action) {
(void)data; (void)touch;
/* Host touch coordinates are surface-local on our host window, which
is the same space the pointer path treats as output-local. */
seat_touch_deliver(time, id, action,
wl_fixed_to_double(fx), wl_fixed_to_double(fy));
}
static void host_touch_down(void *data, struct wl_touch *touch,
uint32_t serial, uint32_t time,
struct wl_surface *surface, int32_t id,
wl_fixed_t fx, wl_fixed_t fy) {
(void)serial; (void)surface;
host_touch_deliver(data, touch, time, id, fx, fy, KICK_TOUCH_DOWN);
}
static void host_touch_motion(void *data, struct wl_touch *touch,
uint32_t time, int32_t id,
wl_fixed_t fx, wl_fixed_t fy) {
host_touch_deliver(data, touch, time, id, fx, fy, KICK_TOUCH_MOTION);
}
static void host_touch_up(void *data, struct wl_touch *touch,
uint32_t serial, uint32_t time, int32_t id) {
(void)data; (void)touch; (void)serial;
seat_touch_deliver(time, id, KICK_TOUCH_UP, 0, 0);
}
static void host_touch_cancel(void *data, struct wl_touch *touch) {
(void)data; (void)touch;
seat_touch_cancel_all();
kick_log(KICK_LOG_DEBUG, "[seat] host touch cancelled\n");
}
static void host_touch_frame(void *data, struct wl_touch *touch) {
(void)data; (void)touch;
if (server.seat)
wlr_seat_touch_notify_frame(server.seat);
}
static const struct wl_touch_listener host_touch_listener = {
.down = host_touch_down,
.motion = host_touch_motion,
.up = host_touch_up,
.cancel = host_touch_cancel,
.frame = host_touch_frame,
};
static const struct wl_pointer_listener host_ptr_listener = {
.enter = host_ptr_enter,
.leave = host_ptr_leave,
.motion = host_ptr_motion_event,
.button = host_ptr_button,
.axis = host_ptr_axis,
.frame = host_ptr_frame,
.axis_source = host_ptr_axis_source,
.axis_stop = host_ptr_axis_stop,
.axis_discrete = host_ptr_axis_discrete,
};
/* When the host compositor (labwc on a VT round-trip) removes a seat
capability, every object created from that seat -- our wl_keyboard /
wl_pointer -- is invalidated, yet the client keeps running silently with
no input ever arriving again. Re-create the objects as capabilities are
re-gained; the compositor re-sends keymap/modifiers/enter on the fresh
wl_keyboard, and host_kbd_enter() re-focuses our nested seat. */
static void host_seat_capabilities(void *data, struct wl_seat *seat,
uint32_t capabilities)
{
(void)data; (void)seat;
kick_log(KICK_LOG_DEBUG, "[seat] capabilities=0x%x\n", capabilities);
const bool have_kbd = (capabilities & WL_SEAT_CAPABILITY_KEYBOARD) != 0;
const bool have_ptr = (capabilities & WL_SEAT_CAPABILITY_POINTER) != 0;
if (have_kbd && !host.keyboard) {
host.keyboard = wl_seat_get_keyboard(host.seat);
if (host.keyboard) {
kick_log(KICK_LOG_DEBUG, "[seat] re-gained keyboard\n");
wl_keyboard_add_listener(host.keyboard, &host_kbd_listener, NULL);
}
} else if (!have_kbd && host.keyboard) {
wl_keyboard_release(host.keyboard);
host.keyboard = NULL;
kick_log(KICK_LOG_DEBUG, "[seat] keyboard capability lost\n");
}
if (have_ptr && !host.pointer) {
host.pointer = wl_seat_get_pointer(host.seat);
if (host.pointer) {
kick_log(KICK_LOG_DEBUG, "[seat] re-gained pointer\n");
wl_pointer_add_listener(host.pointer, &host_ptr_listener, NULL);
}
} else if (!have_ptr && host.pointer) {
host.shape_dev = NULL; /* the shape device goes inert too */
wl_pointer_release(host.pointer);
host.pointer = NULL;
kick_log(KICK_LOG_DEBUG, "[seat] pointer capability lost\n");
}
const bool have_touch =
(capabilities & WL_SEAT_CAPABILITY_TOUCH) != 0;
if (have_touch && !host.touch) {
host.touch = wl_seat_get_touch(host.seat);
if (host.touch) {
kick_log(KICK_LOG_DEBUG, "[seat] re-gained touch\n");
wl_touch_add_listener(host.touch, &host_touch_listener, NULL);
}
} else if (!have_touch && host.touch) {
seat_touch_cancel_all(); /* end sequences cleanly before release */
wl_touch_release(host.touch);
host.touch = NULL;
kick_log(KICK_LOG_DEBUG, "[seat] touch capability lost\n");
}
/* The cursor-shape device rides on the host pointer: (re)create it once
the pointer is (re)available. */
if (host.pointer)
host_cursor_shape_get_pointer();
}
/* ===================== Host init / EGL ===================== */
static bool host_init(void) {
const char *disp = getenv("WAYLAND_DISPLAY");
if (!disp)
disp = "wayland-0";
host.display = wl_display_connect(NULL);
if (!host.display) {
fprintf(stderr, "kick: cannot connect to host compositor "
"(WAYLAND_DISPLAY=%s). Run me inside a running Wayland session.\n",
disp);
return false;
}
host.registry = wl_display_get_registry(host.display);
wl_registry_add_listener(host.registry, &host_registry_listener, NULL);
wl_display_roundtrip(host.display);
host.registry_synced = true;
if (!host.compositor || !host.wm_base) {
fprintf(stderr, "kick: host lacks compositor/xdg_wm_base\n");
return false;
}
host.surface = wl_compositor_create_surface(host.compositor);
/* Backend selection: compositors advertising zxdg_decoration_manager_v1
honor server-side decorations, so kick owns the shell objects and
talks xdg-shell directly -- no set_window_geometry hints, immediate
acks, and fullscreen state application that cannot anchor to stale
geometry (the labwc 0.9.8 misplacement). Hosts without it force
CSD (Mutter/GNOME): hand the window to libdecor, which draws its own
titlebar. KICK_LIBDECOR=1 forces the libdecor path for testing. */
host.use_libdecor = getenv("KICK_LIBDECOR") != NULL || !host.decoration;
xdg_wm_base_add_listener(host.wm_base, &host_xdg_wm_listener, NULL);
if (host.use_libdecor) {
host.libdecor = libdecor_new(host.display, &host_libdecor_iface);
if (!host.libdecor) {
fprintf(stderr, "kick: libdecor failed to initialise\n");
return false;
}
host.frame = libdecor_decorate(host.libdecor, host.surface,
&host_frame_iface, NULL);
if (!host.frame) {
fprintf(stderr, "kick: libdecor_decorate failed\n");
return false;
}
libdecor_frame_set_title(host.frame, "kick");
libdecor_frame_set_app_id(host.frame, "kick");
/* libdecor negotiates xdg decorations with the host: a server-side
title bar when offered, its own client-side titlebar otherwise. */
libdecor_frame_map(host.frame);
wl_surface_commit(host.surface);
wl_display_roundtrip(host.display);
if (host.use_libdecor)
libdecor_dispatch(host.libdecor, 0);
} else {
kick_log(KICK_LOG_INFO,
"host window: direct xdg-shell with server-side decorations\n");
host.xdg_surface = xdg_wm_base_get_xdg_surface(host.wm_base,
host.surface);
host.toplevel = xdg_surface_get_toplevel(host.xdg_surface);
xdg_toplevel_set_title(host.toplevel, "kick");
xdg_toplevel_set_app_id(host.toplevel, "kick");
host.decoration_obj = zxdg_decoration_manager_v1_get_toplevel_decoration(
host.decoration, host.toplevel);
zxdg_toplevel_decoration_v1_add_listener(host.decoration_obj,
&host_decoration_listener, NULL);
zxdg_toplevel_decoration_v1_set_mode(host.decoration_obj,
ZXDG_TOPLEVEL_DECORATION_V1_MODE_SERVER_SIDE);
xdg_surface_add_listener(host.xdg_surface,
&host_xdg_surface_listener, NULL);
xdg_toplevel_add_listener(host.toplevel,
&host_xdg_toplevel_listener, NULL);
wl_surface_commit(host.surface);
wl_display_roundtrip(host.display);
}
/* Host keyboard/pointer are created by the seat capabilities handler
during the registry round-trip above; nothing more to fetch here. */
bridge_init();
/* Try EGL on the host wayland platform */
pfn_eglGetPlatformDisplayEXT = (PFNEGLGETPLATFORMDISPLAYEXTPROC)
eglGetProcAddress("eglGetPlatformDisplayEXT");
if (!pfn_eglGetPlatformDisplayEXT) {
fprintf(stderr, "kick: no EGL platform support; "
"falling back to software rendering\n");
host.egl_ok = false;
return true;
}
host.egl_display = pfn_eglGetPlatformDisplayEXT(EGL_PLATFORM_WAYLAND_EXT,
host.display, NULL);
if (host.egl_display == EGL_NO_DISPLAY) {
fprintf(stderr, "kick: EGL display failed; "
"falling back to software rendering\n");
host.egl_ok = false;
return true;
}
if (!eglInitialize(host.egl_display, NULL, NULL)) {
fprintf(stderr, "kick: eglInitialize failed; "
"falling back to software rendering\n");
host.egl_ok = false;
return true;
}
eglBindAPI(EGL_OPENGL_ES_API);
const EGLint config_attribs[] = {
EGL_SURFACE_TYPE, EGL_WINDOW_BIT,
EGL_RENDERABLE_TYPE, EGL_OPENGL_ES2_BIT,
EGL_RED_SIZE, 8,
EGL_GREEN_SIZE, 8,
EGL_BLUE_SIZE, 8,
EGL_ALPHA_SIZE, 0,
EGL_NONE
};
EGLint ncfg = 0;
if (!eglChooseConfig(host.egl_display, config_attribs, &host.egl_config,
1, &ncfg) || ncfg < 1) {
fprintf(stderr, "kick: no EGL config; software fallback\n");
host.egl_ok = false;
return true;
}
const EGLint ctx_attribs[] = {
EGL_CONTEXT_CLIENT_VERSION, 2,
EGL_NONE
};
host.egl_context = eglCreateContext(host.egl_display, host.egl_config,
EGL_NO_CONTEXT, ctx_attribs);
if (host.egl_context == EGL_NO_CONTEXT) {
fprintf(stderr, "kick: EGL context failed; software fallback\n");
host.egl_ok = false;
return true;
}
host.width = 1280;
host.height = 800;
host.egl_window = wl_egl_window_create(host.surface, host.width, host.height);
host.egl_surface = eglCreateWindowSurface(host.egl_display, host.egl_config,
(EGLNativeWindowType)host.egl_window, NULL);
if (host.egl_surface == EGL_NO_SURFACE) {
fprintf(stderr, "kick: EGL window surface failed; software fallback\n");
host.egl_ok = false;
return true;
}
if (!eglMakeCurrent(host.egl_display, host.egl_surface, host.egl_surface,
host.egl_context)) {
fprintf(stderr, "kick: eglMakeCurrent failed; software fallback\n");
host.egl_ok = false;
return true;
}
eglSwapInterval(host.egl_display, 0);
pfn_eglCreateImageKHR = (PFNEGLCREATEIMAGEKHRPROC)egl_proc("eglCreateImageKHR");
pfn_eglDestroyImageKHR = (PFNEGLDESTROYIMAGEKHRPROC)egl_proc("eglDestroyImageKHR");
pfn_glEGLImageTargetTexture2DOES = (PFNGLEGLIMAGETARGETTEXTURE2DOESPROC)
egl_proc("glEGLImageTargetTexture2DOES");
if (!gl_setup()) {
fprintf(stderr, "kick: GL setup failed; software fallback\n");
host.egl_ok = false;
return true;
}
host.egl_ok = true;
kick_log(KICK_LOG_INFO, "kick: EGL (GPU) rendering enabled\n");
return true;
}
/* ===================== Scene buffer -> host blit ===================== */
static bool import_scene_buffer(struct wlr_buffer *buf, GLuint tex) {
struct wlr_dmabuf_attributes attrs;
if (wlr_buffer_get_dmabuf(buf, &attrs)) {
if (attrs.n_planes < 1) return false;
EGLint att[48];
int n = 0;
att[n++] = EGL_WIDTH; att[n++] = attrs.width;
att[n++] = EGL_HEIGHT; att[n++] = attrs.height;
att[n++] = EGL_LINUX_DRM_FOURCC_EXT; att[n++] = (EGLint)attrs.format;
for (int p = 0; p < attrs.n_planes; p++) {
att[n++] = EGL_DMA_BUF_PLANE0_FD_EXT + p * 3; att[n++] = attrs.fd[p];
att[n++] = EGL_DMA_BUF_PLANE0_OFFSET_EXT + p * 3; att[n++] = (EGLint)attrs.offset[p];
att[n++] = EGL_DMA_BUF_PLANE0_PITCH_EXT + p * 3; att[n++] = (EGLint)attrs.stride[p];
}
if (attrs.modifier != DRM_FORMAT_MOD_INVALID) {
att[n++] = EGL_DMA_BUF_PLANE0_MODIFIER_LO_EXT;
att[n++] = (EGLint)(attrs.modifier & 0xffffffff);
att[n++] = EGL_DMA_BUF_PLANE0_MODIFIER_HI_EXT;
att[n++] = (EGLint)(attrs.modifier >> 32);
}
att[n++] = EGL_NONE;
EGLImageKHR img = pfn_eglCreateImageKHR(host.egl_display, EGL_NO_CONTEXT,
EGL_LINUX_DMA_BUF_EXT,
(EGLClientBuffer)NULL, att);
if (img == EGL_NO_IMAGE_KHR) {
kick_log(KICK_LOG_DEBUG, "[import] eglCreateImageKHR failed "
"(format 0x%x modifier 0x%llx)\n", attrs.format,
(unsigned long long)attrs.modifier);
return false;
}
glBindTexture(GL_TEXTURE_2D, tex);
pfn_glEGLImageTargetTexture2DOES(GL_TEXTURE_2D, img);
pfn_eglDestroyImageKHR(host.egl_display, img);
return true;
}
/* Fallback for non-dmabuf buffers (on a headless backend the allocator
yields shm buffers). Upload via CPU read so shm clients and the shm
swapchain both render into the host window. */
void *data;
uint32_t fmt;
size_t stride;
if (!wlr_buffer_begin_data_ptr_access(buf, WLR_BUFFER_DATA_PTR_ACCESS_READ,
&data, &fmt, &stride)) {
kick_log(KICK_LOG_DEBUG, "[import] buffer is neither dmabuf nor "
"CPU-readable\n");
return false;
}
glBindTexture(GL_TEXTURE_2D, tex);
glPixelStorei(GL_UNPACK_ALIGNMENT, 1);
switch (fmt) {
case DRM_FORMAT_XRGB8888:
case DRM_FORMAT_ARGB8888:
glTexImage2D(GL_TEXTURE_2D, 0, GL_RGBA, buf->width, buf->height, 0,
GL_BGRA_EXT, GL_UNSIGNED_BYTE, data);
break;
default:
kick_log(KICK_LOG_DEBUG, "[import] unsupported CPU fallback format "
"0x%x\n", fmt);
wlr_buffer_end_data_ptr_access(buf);
return false;
}
wlr_buffer_end_data_ptr_access(buf);
return true;
}
/* Pace presents to the host compositor: this fires after the host has shown
the buffer we queued, so we know we may queue the next one. Any frame drawn
while a present is still pending is coalesced into the back buffer and
presented here, keeping exactly one outstanding buffer (no burst, no
tearing on busy repainters like terminals). */
static const struct wl_callback_listener host_frame_listener;
/* Request a host frame callback and present the drawing in the back buffer.
The callback must be requested *before* the swap: frame requests are part
of the state committed by eglSwapBuffers, so requesting it after would wait
on a commit that never comes. */
static void present_to_host(void) {
host.frame_cb = wl_surface_frame(host.surface);
wl_callback_add_listener(host.frame_cb, &host_frame_listener, NULL);
eglSwapBuffers(host.egl_display, host.egl_surface);
host.present_pending = true;
}
static void host_frame_done(void *data, struct wl_callback *callback,
uint32_t callback_data)
{
(void)data; (void)callback; (void)callback_data;
if (host.frame_cb) {
wl_callback_destroy(host.frame_cb);
host.frame_cb = NULL;
}
host.present_pending = false;
/* The pipeline just drained: apply a queued fullscreen change now, while
no swap is outstanding. Frames presented afterwards (back_dirty) are
pre-acknowledge and harmless; the first commit after the configure's
ack will carry the freshly sized buffer. */
if (host.fs_queued) {
host.fs_queued = false;
host_apply_fullscreen(host.fs_target);
}
if (host.back_dirty) {
host.back_dirty = false;
present_to_host();
}
}
static const struct wl_callback_listener host_frame_listener = {
.done = host_frame_done,
};
/* The scene is rendered by the wlroots GLES2 renderer, which owns its own
EGL display/context, while we sample that buffer from a *different* EGL
context (host.egl_display). Without an explicit barrier the GPU may still
be executing the renderer's draw commands when we import+read the dmabuf,
which shows as flicker/tearing on content that repaints continuously.
Make the renderer's context current on this thread and glFinish() so the
buffer is guaranteed fully rendered before we blit it. */
static void sync_renderer_context(void) {
struct wlr_egl *src = wlr_gles2_renderer_get_egl(server.renderer);
if (!src) return;
EGLDisplay d = wlr_egl_get_display(src);
EGLContext c = wlr_egl_get_context(src);
if (d == EGL_NO_DISPLAY || c == EGL_NO_CONTEXT) return;
if (d == host.egl_display && c == host.egl_context) return;
eglMakeCurrent(d, EGL_NO_SURFACE, EGL_NO_SURFACE, c);
glFinish();
eglMakeCurrent(host.egl_display, host.egl_surface, host.egl_surface,
host.egl_context);
}
static void blit_scene_buffer(struct wlr_buffer *buf) {
int w = host.width, h = host.height;
glViewport(0, 0, w, h);
glClearColor(0.0f, 0.0f, 0.0f, 1.0f);
glClear(GL_COLOR_BUFFER_BIT);
bool imported = buf && import_scene_buffer(buf, host.import_tex);
if (imported) {
static const GLfloat white[4] = { 1, 1, 1, 1 };
glEnable(GL_BLEND);
glBlendFunc(GL_SRC_ALPHA, GL_ONE_MINUS_SRC_ALPHA);
draw_texture_rect(host.import_tex, buf->width, buf->height,
0, 0, buf->width, buf->height, 0, 0,
buf->width, buf->height, w, h, white);
glDisable(GL_BLEND);
}
if (dump_host_req) {
dump_host_req = false;
dump_host_back();
}
if (!imported) {
/* Never present a frame that is only the clear colour: keep the last
good frame on the host. A later frame with a good import presents
normally. */
return;
}
if (host.present_pending) {
/* Host hasn't shown the previous buffer yet: redraw into the back
buffer and coalesce the swap until the frame callback arrives. */
host.back_dirty = true;
} else {
present_to_host();
}
}
/* Standalone (native-output) frame: composite the scene into our swapchain,
then draw the Alt overlay as a second pass on the same buffer from wlr
textures. There is no host EGL surface to blit to and no host frame-call
pacing; the native output's own commit drives presentation. */
/* Output powered off: overwrite the just-composited scene buffer with opaque
black so the committed frame is truly dark (not a stale scene frame).
Called in both render paths right after a successful build_state. */
static void draw_power_blank(struct wlr_buffer *buf) {
struct wlr_render_pass *pass =
wlr_renderer_begin_buffer_pass(server.renderer, buf, NULL);
if (!pass) return;
struct wlr_render_rect_options opts = {
.box = { .x = 0, .y = 0, .width = buf->width, .height = buf->height },
.color = { .r = 0.0f, .g = 0.0f, .b = 0.0f, .a = 1.0f },
.blend_mode = WLR_RENDER_BLEND_MODE_NONE,
};
wlr_render_pass_add_rect(pass, &opts);
wlr_render_pass_submit(pass);
}
static void render_standalone(void) {
if (!server.scene_output || !server.swapchain) return;
struct wlr_output_state state;
wlr_output_state_init(&state);
apply_pending_output_resize(&state);
/* The overlay is painted into the output buffer outside the scene graph,
so the scene's damage ring never learns about its box: a partial
repaint (client damage, a dump wake, cursor work) would leave previous
coats baked in and stack the translucent backdrop toward opaque. For
as long as the overlay shows, make every frame repaint the whole
scene beneath it so each coat lands on clean client content. */
if (host.overlay_visible)
wlr_damage_ring_add_whole(&server.scene_output->damage_ring);
struct wlr_scene_output_state_options options = {
.swapchain = server.swapchain,
};
bool rendered = wlr_scene_output_build_state(server.scene_output, &state,
&options);
if (!rendered || !state.buffer) {
kick_log(KICK_LOG_DEBUG, "[render] build_state failed\n");
wlr_output_state_finish(&state);
goto frame_done;
}
/* Output powered off (wlopm): blank the composited frame before commit. */
if (!server.output_powered)
draw_power_blank(state.buffer);
if (dump_scene_req) {
dump_scene_req = false;
dump_scene_buffer(state.buffer);
}
if (host.overlay_visible || confirm_quit_pending) {
struct wlr_render_pass *pass = wlr_renderer_begin_buffer_pass(
server.renderer, state.buffer, NULL);
if (pass) {
draw_tab_overlay_pass(pass);
wlr_render_pass_submit(pass);
}
}
if (dump_host_req) {
dump_host_req = false;
dump_standalone_buffer(state.buffer);
}
apply_tearing_hint(&state);
if (!wlr_output_commit_state(server.output, &state))
kick_log(KICK_LOG_DEBUG, "[render] output commit failed\n");
frame_done:
struct timespec now;
clock_gettime(CLOCK_MONOTONIC, &now);
wlr_scene_output_send_frame_done(server.scene_output, &now);
wlr_output_state_finish(&state);
}
static void render_and_present(void) {
if (server.standalone) {
render_standalone();
return;
}
if (!host.egl_ok || !host.configured) return;
if (!server.scene_output || !server.swapchain) return;
struct wlr_output_state state;
wlr_output_state_init(&state);
apply_pending_output_resize(&state);
/* Same rationale as render_standalone(): the overlay paints outside the
scene graph, so partial repaints would stack coats on its box. */
if (host.overlay_visible)
wlr_damage_ring_add_whole(&server.scene_output->damage_ring);
struct wlr_scene_output_state_options options = {
.swapchain = server.swapchain,
};
bool rendered = wlr_scene_output_build_state(server.scene_output, &state,
&options);
if (!rendered || !state.buffer) {
kick_log(KICK_LOG_DEBUG, "[render] build_state failed\n");
wlr_output_state_finish(&state);
goto frame_done;
}
/* Output powered off (wlopm): blank the composited frame before commit. */
if (!server.output_powered)
draw_power_blank(state.buffer);
/* [diag] What did wlroots composite? A swapchain-sized buffer means we
composited the scene; anything else implies direct scanout of a client
buffer (which our blit may or may not import). */
if (kick_log_level() >= KICK_LOG_DEBUG) {
struct wlr_output *out = server.output;
kick_log(KICK_LOG_DEBUG, "[diag] frame buffer %dx%d (output %dx%d)\n",
state.buffer->width, state.buffer->height,
out ? out->width : 0, out ? out->height : 0);
}
/* Barrier between the wlr renderer's context and our host blit. */
sync_renderer_context();
if (dump_scene_req) {
dump_scene_req = false;
dump_scene_buffer(state.buffer);
}
static int autodump = -1;
if (autodump < 0)
autodump = getenv("KICK_AUTODUMP") ? 1 : 0;
if (autodump > 0 && client_dumped && --autodump == 0) {
dump_scene_req = true;
dump_host_req = true;
/* The flags are consumed by the *next* render pass; under the
idle-stop gate that pass needs an explicit redraw request. */
kick_request_redraw();
}
/* Overlay joins the frame before the blit, drawn exactly as standalone
draws it -- one renderer for both modes; the blit stays a pure copy. */
if (host.overlay_visible || confirm_quit_pending) {
struct wlr_render_pass *pass = wlr_renderer_begin_buffer_pass(
server.renderer, state.buffer, NULL);
if (pass) {
draw_tab_overlay_pass(pass);
wlr_render_pass_submit(pass);
}
}
blit_scene_buffer(state.buffer);
apply_tearing_hint(&state);
if (!wlr_output_commit_state(server.output, &state))
kick_log(KICK_LOG_DEBUG, "[render] output commit failed\n");
frame_done:
struct timespec now;
clock_gettime(CLOCK_MONOTONIC, &now);
wlr_scene_output_send_frame_done(server.scene_output, &now);
wlr_output_state_finish(&state);
}
/* ===================== Launch client ===================== */
/* Does the first whitespace-delimited word of `cmd` resolve to an executable
on PATH? Mirrors how `sh -c <cmd>` resolves the first word, so this is a
cheap pre-launch "which" check. Returns 1 if found (or uncheckable, e.g.
a word too long or no PATH), 0 if the word is definitely missing. */
static int cmd_in_path(const char *cmd) {
while (*cmd == ' ' || *cmd == '\t')
cmd++;
const char *p = cmd;
while (*p && *p != ' ' && *p != '\t' && *p != '\n')
p++;
if (p == cmd)
return 0;
char word[256];
size_t n = (size_t)(p - cmd);
if (n >= sizeof(word))
return 1; /* give up on absurdly long commands */
memcpy(word, cmd, n);
word[n] = '\0';
if (strchr(word, '/'))
return access(word, X_OK) == 0;
const char *path_env = getenv("PATH");
if (!path_env) path_env = "/usr/local/bin:/usr/bin:/bin";
char buf[512];
for (const char *d = path_env; d && *d; ) {
const char *colon = strchr(d, ':');
size_t len = colon ? (size_t)(colon - d) : strlen(d);
if (len == 0) {
len = 1;
buf[0] = '.';
} else {
if (len + 1 + n >= sizeof(buf)) {
if (colon) d = colon + 1; else d = NULL;
continue;
}
memcpy(buf, d, len);
buf[len] = '/';
}
memcpy(buf + len + 1, word, n);
buf[len + 1 + n] = '\0';
if (access(buf, X_OK) == 0)
return 1;
if (colon) d = colon + 1; else d = NULL;
}
return 0;
}
#if HAVE_XWAYLAND
/* Kick runs its own plain Xwayland (see the wlr_xwayland_create call site):
no -auth, so any local client connects without a magic cookie and nothing
is written to the session Xauthority. This is the normal wlroots default
and avoids the legacy X11 access-control dance entirely. */
#endif
static void launch_client(struct kick_window *w) {
pid_t pid = fork();
if (pid == 0) {
/* Own process group so we can kill the whole client tree on exit. */
setpgid(0, 0);
const char *xdg_runtime = getenv("XDG_RUNTIME_DIR");
if (!xdg_runtime) xdg_runtime = "/tmp";
setenv("WAYLAND_DISPLAY", kick_socket, 1);
setenv("XDG_RUNTIME_DIR", xdg_runtime, 1);
/* Toolkits self-select their connection: Wayland-capable ones see
only our socket above, X11-only ones (emacs-gtk, xmessage) take
DISPLAY below. Never force GDK_BACKEND/QT_QPA_PLATFORM to
"wayland" here: an explicit value removes the toolkit's fallback,
so an X11-only GTK build dies with a misleading "cannot open
display" even though our Xwayland is reachable. */
unsetenv("XAUTHORITY");
#if HAVE_XWAYLAND
/* X11 commands connect through our permissive Xwayland. */
if (server.xwayland && server.xwayland->display_name) {
setenv("DISPLAY", server.xwayland->display_name, 1);
} else
unsetenv("DISPLAY");
#else
unsetenv("DISPLAY");
#endif
/* Unless debugging, don't let client chatter spill onto the launching
terminal; the client inherits our stdout/stderr. */
if (kick_log_level() < KICK_LOG_DEBUG) {
int nullfd = open("/dev/null", O_WRONLY);
if (nullfd >= 0) {
dup2(nullfd, STDOUT_FILENO);
dup2(nullfd, STDERR_FILENO);
if (nullfd > STDERR_FILENO) close(nullfd);
}
}
execlp("/bin/sh", "sh", "-c", w->cmd, NULL);
_exit(127);
}
if (pid > 0) {
w->pid = pid;
kick_log(KICK_LOG_INFO, "[launch] app=%d pid=%d cmd=%s\n",
tab_index(w->tab), pid, w->cmd);
}
}
/* Fork every command-line command at startup, in command-line order. Each
tab keeps its position because handle_new_toplevel claims its pending
window by process group (launch_client runs each command in its own
setpgid'd group, whose id equals w->pid), so the tab order mirrors the
command line no matter which client connects first. A command that never
connects leaves its tab black; a command whose process group exits without
ever connecting is swept away later (see sweep_dead_startup_groups). */
static void launch_all_cli(void) {
struct kick_tab *tab;
wl_list_for_each(tab, &server.tabs, link) {
struct kick_window *w;
wl_list_for_each(w, &tab->windows, link)
if (w->origin == ORIGIN_CLI)
launch_client(w);
}
}
/* Drop black tabs whose command's whole process group has exited (e.g.
`kick /bin/false` -- sh runs false, the group empties, and the
tab would otherwise stay black forever). Runs from the main loop after a
SIGCHLD, never from the handler: it frees slots. Group liveness, not the
launcher pid's, decides: `sh -c "cmd &"` returns while cmd is still
starting, but cmd holds the group open, so kill(-groupid,0) succeeds and
the tab survives. */
/* Human words for a raw waitpid status, for the sweep's diagnostics. */
static void describe_child_status(int status, char *buf, size_t cap) {
if (WIFEXITED(status))
snprintf(buf, cap, "exit code %d", WEXITSTATUS(status));
else if (WIFSIGNALED(status))
snprintf(buf, cap, "killed by signal %d", WTERMSIG(status));
else
snprintf(buf, cap, "status 0x%x", status);
}
static void sweep_dead_startup_groups(void) {
struct kick_tab *tab, *tab_tmp;
wl_list_for_each_safe(tab, tab_tmp, &server.tabs, link) {
struct kick_window *w;
wl_list_for_each(w, &tab->windows, link) {
if (w->toplevel || !w->pending_claim || w->closing || w->pid <= 0)
continue;
errno = 0;
if (kill(-w->pid, 0) == 0 || errno == EPERM)
continue; /* the group still has a member */
if (errno != ESRCH)
continue;
/* Say why on stderr regardless of log level: at default levels the
client's own output is /dev/null'd and kick_log INFO is hidden,
so a command that dies before opening its window would otherwise
end the session (last tab) or shrink it with no visible
explanation. */
char why[64];
why[0] = '\0';
if ((pid_t)last_child_pid == w->pid)
describe_child_status((int)last_child_status, why, sizeof(why));
const char *cmd = w->cmd ? w->cmd : "?";
if (why[0])
fprintf(stderr, "kick: tab %d (%s): command exited without "
"opening a window (%s)\n", tab_index(tab), cmd, why);
else
fprintf(stderr, "kick: tab %d (%s): command exited without "
"opening a window\n", tab_index(tab), cmd);
if (server.active_tab == tab) {
server.active_tab = NULL;
struct kick_tab *succ = pick_successor(tab, 0);
if (!succ) succ = pick_successor(tab, 1);
if (succ)
set_active_tab(succ);
else {
/* the last tab died before ever connecting: tear down */
fprintf(stderr, "kick: no tabs left to show, exiting\n");
host_teardown_window();
shutdown_cleanup();
exit(0);
}
}
remove_tab(tab);
break; /* the tab is gone; stop walking its windows */
}
}
/* If the sweep's succession handed active to a tab that this same pass
then removed, put the crown back on some live tab (or nothing). */
if (!server.active_tab) {
struct kick_tab *succ = NULL;
struct kick_tab *t;
wl_list_for_each(t, &server.tabs, link)
if (tab_live(t) && !tab_closing(t)) {
succ = t;
break;
}
if (succ)
set_active_tab(succ);
}
}
/* Drain the SIGCHLD latch and reap dead startup groups; called from both
event loops after each dispatch. */
static void sweep_dead_startup(void) {
if (!sigchld_seen) return;
sigchld_seen = 0;
sweep_dead_startup_groups();
}
/* Add a new tab launching `cmd` and start it, exactly as if `cmd` had been
given as a command-line argument. The tab is inserted in the tab order
right after the currently active tab (falling back to the far right if
none is active), so the new tab sits to its right in the cycle. It
carries a still-black pending window, exactly like a command-line
command, until its client claims the slot. Returns the new tab's index,
or -1 on allocation failure. */
static int add_tab(const char *cmd) {
struct kick_tab *tab = calloc(1, sizeof(*tab));
if (!tab) return -1;
wl_list_init(&tab->windows);
/* Anchor on the active tab itself, not its toplevel: while the active
tab is still black (its client has not connected yet) its pending
window has no toplevel either, and inserting after the tab is what
keeps the new terminal beside the current tab. */
insert_tab_after(tab, server.active_tab);
struct kick_window *w = window_alloc(tab);
if (!w) {
wl_list_remove(&tab->link);
free(tab);
return -1;
}
w->cmd = strdup(cmd);
if (!w->cmd) {
wl_list_remove(&w->link);
wl_list_remove(&tab->link);
free(tab);
return -1;
}
w->pid = -1;
w->pending_claim = true;
w->origin = ORIGIN_ADD_TAB;
launch_client(w);
return tab_index(tab);
}
/* ===================== Crash handler ===================== */
static void crash_handler(int sig, siginfo_t *info, void *ctx) {
(void)sig; (void)info; (void)ctx;
void *bt[64];
int n = backtrace(bt, 64);
write(2, "\n=== BACKTRACE ===\n", 19);
backtrace_symbols_fd(bt, n, 2);
remove_socket_file();
_exit(139);
}
static void sigchld_handler(int sig) {
(void)sig;
sigchld_seen = 1;
int status;
pid_t pid;
while ((pid = waitpid(-1, &status, WNOHANG)) > 0) {
last_child_pid = (sig_atomic_t)pid;
last_child_status = (sig_atomic_t)status;
if (kick_log_level() >= KICK_LOG_DEBUG) {
/* snprintf()/write() are async-signal-safe; fprintf() is not (it
takes the FILE lock, which can deadlock if we interrupt a logging
fprintf in the main loop). */
char buf[64];
int n = snprintf(buf, sizeof(buf),
"[child] pid %d exited status 0x%x\n", pid, status);
if (n > 0 && (size_t)n < sizeof(buf))
(void)!write(STDERR_FILENO, buf, (size_t)n);
}
}
}
/* On SIGTERM or Ctrl-C (SIGINT), take down the clients and exit cleanly
rather than leaving them orphaned when the compositor dies. The clients
live in their own process groups, so a terminal Ctrl-C only reaches us.
These signals are delivered through the event loop (wl_event_loop_add_signal
in main) rather than a raw sigaction handler: the full teardown calls
malloc/free and libwayland proxy destroys, which are not async-signal-safe
and deadlock if the signal interrupts fork()/malloc()/logging (observed:
SIGTERM landing inside launch_client's fork() left libc's allocator lock
held, and shutdown_cleanup() -> bridge_cleanup() -> calloc() blocked on it
forever). Running it from a normal loop callback makes that impossible. */
static int close_signal_cb(int sig, void *data) {
(void)sig;
(void)data;
shutdown_cleanup();
_exit(0);
return 0;
}
/* SIGUSR1: save the current scene buffer and host back buffer on the next
frame, for inspecting what the client has actually drawn so far. */
static void sigusr1_handler(int sig) {
(void)sig;
dump_scene_req = 1;
dump_host_req = 1;
needs_redraw = 1;
/* A signal can land while the loop is blocked in poll on an idle
compositor; the write wakes it so the dump still renders. */
if (server.sig_pipe[1] >= 0) {
char c = 1;
(void)!write(server.sig_pipe[1], &c, 1);
}
}
/* Drain the SIGUSR1 self-pipe wake; the render gate (not this callback)
decides what to present. */
static int sigpipe_cb(int fd, uint32_t mask, void *data) {
(void)mask; (void)data;
char buf[64];
while (read(fd, buf, sizeof(buf)) > 0)
;
return 0;
}
/* Does the comma-separated WLR_BACKENDS list contain `name`? */
static bool backends_include(const char *env, const char *name) {
size_t len = strlen(name);
for (const char *p = env; p && *p; ) {
const char *comma = strchr(p, ',');
size_t n = comma ? (size_t)(comma - p) : strlen(p);
if (n == len && strncmp(p, name, len) == 0)
return true;
p = comma ? comma + 1 : NULL;
}
return false;
}
/* ===================== Main ===================== */
/* Parse a --screen-mode value: WxH or WxH@Hz (the Hz is matched at the
mode's mHz precision, so "60" == 60.000). Stores into mode_req_w/h/
refresh; returns false on a malformed value. */
static bool parse_screen_mode(const char *val) {
int w = 0, h = 0;
const char *p = val;
for (; *p >= '0' && *p <= '9'; p++)
w = w * 10 + (*p - '0');
if (*p != 'x')
return false;
p++;
for (; *p >= '0' && *p <= '9'; p++)
h = h * 10 + (*p - '0');
if (w <= 0 || h <= 0)
return false;
unsigned refresh_mhz = 0;
if (*p == '@') {
char *end = NULL;
double hz = strtod(p + 1, &end);
if (end == p + 1 || hz <= 0.0 || *end != '\0')
return false;
refresh_mhz = (unsigned)(hz * 1000.0 + 0.5);
} else if (*p != '\0') {
return false;
}
mode_req_w = w;
mode_req_h = h;
mode_req_refresh = (int)refresh_mhz;
return true;
}
/* True when this process was started from a Linux virtual console: our
controlling terminal is a real VT (/dev/tty<digits>) and there is no
ambient graphical session (neither WAYLAND_DISPLAY nor DISPLAY) that
nested mode could open its window in. SSH sessions, terminal emulators
and pipes all fail the tty shape test (/dev/pts/N, /dev/ttyS*, not a tty),
so they keep the nested default. */
static bool started_on_console(void) {
char name[64];
if (getenv("WAYLAND_DISPLAY") || getenv("DISPLAY"))
return false;
if (!isatty(STDIN_FILENO))
return false;
if (ttyname_r(STDIN_FILENO, name, sizeof(name)) != 0)
return false;
if (strncmp(name, "/dev/tty", 8) != 0 || name[8] == '\0')
return false;
for (const char *p = name + 8; *p; p++)
if (*p < '0' || *p > '9')
return false;
return true;
}
int main(int argc, char *argv[]) {
snprintf(kick_socket, sizeof(kick_socket), "kick-%d",
(int)getpid());
const char *runtime = getenv("XDG_RUNTIME_DIR");
if (!runtime) runtime = "/tmp";
snprintf(socket_path, sizeof(socket_path), "%s/%s", runtime, kick_socket);
/* Clear a stale leftover (e.g. from a crashed previous run with the same
name) before we try to bind; harmless if there is none. */
remove_socket_file();
/* Resolve KICK_LOG up front so signal handlers can read the cached
level without touching non-async-signal-safe functions. */
kick_log_level_init();
/* KICK_SYNTH_INPUT: keep real host keyboard events out of the test
channel so the stdin feed is the only source of key/modifier input. */
{
const char *v = getenv("KICK_SYNTH_INPUT");
synth_input_only = v && v[0] && v[0] != '0';
}
/* Alt+Shift+T opens a terminal named by $TERMINAL when set, else the
alacritty default. Every command-line argument is one tab launcher,
except --screen-mode WxH[@Hz], which selects the native output mode and
is consumed here, --modifier alt|super, which picks the modifier
prefix for the tab-management chords, and --start-cmd-index N, which
picks the command (1-based) that starts focused. Handle all of this up
front so a missing command (or a bad request) can be reported and the
process can exit before any window is created. */
{
const char *env_term = getenv("TERMINAL");
if (env_term && env_term[0])
term_cmd = env_term;
}
char **appv = calloc((size_t)argc, sizeof(*appv));
if (!appv) {
fprintf(stderr, "kick: out of memory\n");
return 1;
}
int napps = 0;
for (int i = 1; i < argc; i++) {
if (strcmp(argv[i], "-h") == 0 || strcmp(argv[i], "--help") == 0) {
fprintf(stderr,
"kick Tab Compositor\n"
"\n"
"kick opens one tab per command-line argument. Each "
"argument is a shell\n"
"command; quote it when it takes arguments. With no "
"arguments a single\n"
"terminal tab opens ($TERMINAL, default alacritty).\n"
"\n"
"Tabs are managed with chords on a modifier prefix -- "
"Alt by default;\n"
"--modifier super moves them to Super.\n"
"\n"
"Usage:\n"
" %s [options] [prog...]\n"
" %s -h | --help\n"
"\n"
"Example:\n"
" # kick \"firefox -no-remote\"\n"
"\n"
"Options:\n"
" --screen-mode WxH[@Hz] Select the native output "
"mode (standalone\n"
" only), e.g. 1920x1080 or "
"1920x1080@60. A\n"
" request nothing supports "
"prints every mode\n"
" and exits.\n"
" --modifier alt|super Pick the tab-management "
"modifier (default\n"
" alt). 'super' suits "
"standalone/DRM and\n"
" labwc-style hosts.\n"
" --start-cmd-index N Pick the command (1-based) "
"that starts\n"
" focused; without it the "
"last command does.\n"
" --tab-groups on|off How a client's related "
"windows group with their tab:\n"
" 'on' (default) stacks them "
"over the parent tab,\n"
" sharing its visibility and "
"focus (a browser-style\n"
" tab group); 'off' gives each "
"related window its own\n"
" tab right of the parent.\n"
" --panel CMD Launch a wlr-layer-shell "
"panel (e.g. waybar) as an\n"
" always-on-top bar that "
"sizes the tabs underneath it.\n"
" -h, --help Show the full help.\n"
"\n"
"Keys (hold the modifier):\n"
" Up / Down Cycle tabs; hold to keep "
"cycling.\n"
" Shift+Up / Shift+Down Reorder the active tab.\n"
" Delete Close the active window (or the tab when it is the only window).\n"
" Shift+T Open a new terminal tab "
"($TERMINAL).\n"
" Left / Right Cycle the active tab's "
"tab-group windows (Left = previous, Right = next); hold "
"to keep cycling.\n"
" Ctrl+Alt+F1..F12 Switch virtual terminals "
"(standalone only).\n"
" Ctrl+Alt+Q Quit kick: asks for "
"confirmation when more than\n"
" one window is open "
"(Y/Enter quits, N/Escape keeps running).\n",
argv[0], argv[0]);
free(appv);
return 0;
}
const char *val = NULL;
if (strcmp(argv[i], "--screen-mode") == 0) {
if (i + 1 >= argc) {
fprintf(stderr, "kick: --screen-mode needs a value, "
"e.g. --screen-mode 1920x1080\n");
free(appv);
return 2;
}
val = argv[++i];
} else if (strncmp(argv[i], "--screen-mode=", 14) == 0) {
val = argv[i] + 14;
} else if (strcmp(argv[i], "--modifier") == 0) {
if (i + 1 >= argc) {
fprintf(stderr, "kick: --modifier needs a value, "
"e.g. --modifier super\n");
free(appv);
return 2;
}
const char *m = argv[++i];
if (strcmp(m, "alt") == 0) {
tab_prefix = PREFIX_ALT;
} else if (strcmp(m, "super") == 0) {
tab_prefix = PREFIX_SUPER;
} else {
fprintf(stderr, "kick: bad --modifier '%s' "
"(use 'alt' or 'super')\n", m);
free(appv);
return 2;
}
continue;
} else if (strncmp(argv[i], "--modifier=", 11) == 0) {
const char *m = argv[i] + 11;
if (strcmp(m, "alt") == 0) {
tab_prefix = PREFIX_ALT;
} else if (strcmp(m, "super") == 0) {
tab_prefix = PREFIX_SUPER;
} else {
fprintf(stderr, "kick: bad --modifier '%s' "
"(use 'alt' or 'super')\n", m);
free(appv);
return 2;
}
continue;
} else if (strcmp(argv[i], "--tab-groups") == 0) {
if (i + 1 >= argc) {
fprintf(stderr, "kick: --tab-groups needs a value "
"(on or off)\n");
free(appv);
return 2;
}
const char *m = argv[++i];
if (strcmp(m, "off") == 0) {
tab_groups = false;
} else if (strcmp(m, "on") == 0) {
tab_groups = true;
} else {
fprintf(stderr, "kick: bad --tab-groups '%s' "
"(use 'on' or 'off')\n", m);
free(appv);
return 2;
}
continue;
} else if (strncmp(argv[i], "--tab-groups=", 13) == 0) {
const char *m = argv[i] + 13;
if (strcmp(m, "off") == 0) {
tab_groups = false;
} else if (strcmp(m, "on") == 0) {
tab_groups = true;
} else {
fprintf(stderr, "kick: bad --tab-groups '%s' "
"(use 'on' or 'off')\n", m);
free(appv);
return 2;
}
continue;
} else if (strcmp(argv[i], "--panel") == 0) {
if (i + 1 >= argc) {
fprintf(stderr, "kick: --panel needs a value, "
"e.g. --panel waybar\n");
free(appv);
return 2;
}
if (server.panel_cmd) {
fprintf(stderr, "kick: only one --panel is allowed\n");
free(appv);
return 2;
}
server.panel_cmd = strdup(argv[++i]);
continue;
} else if (strncmp(argv[i], "--panel=", 8) == 0) {
if (server.panel_cmd) {
fprintf(stderr, "kick: only one --panel is allowed\n");
free(appv);
return 2;
}
server.panel_cmd = strdup(argv[i] + 8);
continue;
} else if (strcmp(argv[i], "--start-cmd-index") == 0) {
if (i + 1 >= argc) {
fprintf(stderr, "kick: --start-cmd-index needs a "
"value, e.g. --start-cmd-index 2\n");
free(appv);
return 2;
}
const char *n = argv[++i];
char *end = NULL;
long idx = strtol(n, &end, 10);
if (end == n || *end != '\0' || idx < 1 || idx > 2147483647L) {
fprintf(stderr, "kick: bad --start-cmd-index '%s' "
"(use a 1-based command number, e.g. --start-cmd-index "
"2)\n", n);
free(appv);
return 2;
}
/* Convert to the program's 0-based index as soon as possible. */
start_cmd_index = (int)idx - 1;
continue;
} else if (strncmp(argv[i], "--start-cmd-index=",
sizeof("--start-cmd-index=") - 1) == 0) {
const char *n = argv[i] + sizeof("--start-cmd-index=") - 1;
char *end = NULL;
long idx = strtol(n, &end, 10);
if (end == n || *end != '\0' || idx < 1 || idx > 2147483647L) {
fprintf(stderr, "kick: bad --start-cmd-index '%s' "
"(use a 1-based command number)\n", n);
free(appv);
return 2;
}
start_cmd_index = (int)idx - 1;
continue;
}
if (val) {
if (!parse_screen_mode(val)) {
fprintf(stderr, "kick: bad --screen-mode '%s' "
"(use WxH or WxH@Hz, e.g. 1920x1080 or "
"1920x1080@60)\n", val);
free(appv);
return 2;
}
continue;
}
appv[napps++] = argv[i];
}
int total_apps = napps;
bool default_tab = false;
if (total_apps == 0) {
/* No arguments: open one terminal tab, as Alt+Shift+T would. */
default_tab = true;
total_apps = 1;
}
if (start_cmd_index >= 0 && start_cmd_index >= total_apps) {
fprintf(stderr, "kick: --start-cmd-index %d is out of range: "
"1..%d (%d command%s)\n", start_cmd_index + 1, total_apps,
total_apps, total_apps == 1 ? "" : "s");
free(appv);
return 2;
}
for (int i = 0; i < total_apps; i++) {
const char *cmd = default_tab ? term_cmd : appv[i];
if (!cmd_in_path(cmd)) {
fprintf(stderr, "kick: '%s' not found in PATH%s\n",
cmd, default_tab ? " (set $TERMINAL)" : "");
free(appv);
return 1;
}
}
if (server.panel_cmd && !cmd_in_path(server.panel_cmd)) {
fprintf(stderr, "kick: --panel '%s' not found in PATH\n",
server.panel_cmd);
free(appv);
return 1;
}
struct sigaction crash_sa = {
.sa_sigaction = crash_handler,
.sa_flags = SA_SIGINFO | SA_NODEFER,
};
sigaction(SIGSEGV, &crash_sa, NULL);
sigaction(SIGABRT, &crash_sa, NULL);
server.sig_pipe[0] = server.sig_pipe[1] = -1;
if (pipe(server.sig_pipe) != 0) {
fprintf(stderr, "kick: failed to create SIGUSR1 wake pipe\n");
return 1;
}
int pipe_flags = fcntl(server.sig_pipe[0], F_GETFL, 0);
if (pipe_flags < 0
|| fcntl(server.sig_pipe[0], F_SETFL,
pipe_flags | O_NONBLOCK) != 0) {
fprintf(stderr, "kick: failed to make SIGUSR1 pipe non-blocking\n");
return 1;
}
signal(SIGCHLD, sigchld_handler);
signal(SIGUSR1, sigusr1_handler);
/* wlroots logs follow KICK_LOG: quiet keeps only errors, info drops
protocol noise, debug shows everything. */
switch (kick_log_level()) {
case KICK_LOG_DEBUG:
wlr_log_init(WLR_DEBUG, NULL);
break;
case KICK_LOG_INFO:
wlr_log_init(WLR_INFO, NULL);
break;
default:
wlr_log_init(WLR_ERROR, NULL);
break;
}
/* Mode selection: KICK_MODE=standalone (or any forced WLR_BACKENDS)
drives a native output directly (DRM, or headless for tests); the
default nested mode blits a headless output into a host window.
With neither variable set, launching from a Linux virtual console
picks standalone automatically so plain `kick` works at a TTY;
KICK_MODE=nested pins the old behaviour there. */
server.standalone = false;
const char *mode_reason = "default";
{
const char *mode = getenv("KICK_MODE");
const char *wlr_backends = getenv("WLR_BACKENDS");
if (mode && strcmp(mode, "standalone") == 0) {
server.standalone = true;
mode_reason = "KICK_MODE";
} else if (mode && mode[0]) {
/* any other explicit value (e.g. KICK_MODE=nested) pins nested */
mode_reason = "KICK_MODE";
} else if (!wlr_backends || !wlr_backends[0]) {
server.standalone = started_on_console();
mode_reason = server.standalone ? "console" : "default";
}
if (wlr_backends && wlr_backends[0]) {
server.standalone = true;
mode_reason = "WLR_BACKENDS";
}
}
kick_log(KICK_LOG_INFO, "[mode] %s (%s)\n",
server.standalone ? "standalone" : "nested", mode_reason);
server.wl_display = wl_display_create();
if (!server.wl_display) {
fprintf(stderr, "kick: failed to create Wayland display\n");
return 1;
}
server.loop = wl_display_get_event_loop(server.wl_display);
wl_list_init(&server.kbdevs);
wl_list_init(&server.ptrdevs);
wl_list_init(&server.touchdevs);
/* SIGUSR1 dump wake: the read end registers an event source so the byte
written by the handler interrupts the blocking dispatch below. */
server.sigpipe_src = wl_event_loop_add_fd(server.loop, server.sig_pipe[0],
WL_EVENT_READABLE, sigpipe_cb, NULL);
/* Route SIGTERM/SIGINT through the event loop (signalfd) so shutdown runs
in normal context; see close_signal_cb for why a raw handler is unsafe. */
wl_event_loop_add_signal(server.loop, SIGTERM, close_signal_cb, NULL);
wl_event_loop_add_signal(server.loop, SIGINT, close_signal_cb, NULL);
/* stdin event feed: lets tests/drivers inject raw keyboard events
into the real host key handlers without a host compositor. */
server.ctl_source = wl_event_loop_add_fd(server.loop, STDIN_FILENO,
WL_EVENT_READABLE,
ctl_cb, NULL);
if (server.standalone) {
/* autocreate honours WLR_BACKENDS and otherwise picks the current
session's wayland/x11 backend (we run inside some compositor
elsewhere), so force DRM+libinput unless told otherwise. */
const char *wlr_backends = getenv("WLR_BACKENDS");
if (!wlr_backends || !wlr_backends[0]) {
wlr_backends = "drm,libinput";
setenv("WLR_BACKENDS", wlr_backends, 1);
}
server.standalone_headless = backends_include(wlr_backends, "headless");
/* autocreate wraps every backend in a wlr_multi_backend, which breaks
the plain headless backend's manual wlr_headless_add_output() below
(it asserts wlr_backend_is_headless()), so create the headless
backend directly instead. */
if (server.standalone_headless)
server.backend = wlr_headless_backend_create(server.loop);
else
server.backend = wlr_backend_autocreate(server.loop, &server.session);
} else {
server.backend = wlr_headless_backend_create(server.loop);
}
if (!server.backend) {
fprintf(stderr, "kick: failed to create %s backend\n",
server.standalone ? "backend (autocreate)"
: "headless backend");
return 1;
}
server.renderer = wlr_renderer_autocreate(server.backend);
if (!server.renderer) {
fprintf(stderr, "kick: no GPU renderer available\n");
return 1;
}
/* wl_shm and zwp_linux_dmabuf_v1 are advertised once each, explicitly,
further below. The legacy wlr_renderer_init_wl_display() shortcut
must NOT be used here: it creates a second wl_shm (v2) and a second
linux-dmabuf (v4) beside the explicit ones, and clients that
initialize state per advertised global -- Qt's Wayland platform
re-enters its dmabuf feedback setup for every instance -- segfault
on the duplicate (VLC died in QWaylandDisplay::registry_global). */
/* The overlay glyph atlas rides the wlr renderer in both modes. */
overlay_font_init();
server.allocator = wlr_allocator_autocreate(server.backend, server.renderer);
if (!server.allocator) {
fprintf(stderr, "kick: failed to create allocator\n");
return 1;
}
/* wl_surface at v4: legacy clients (e.g. VLC's Wayland vout) place video
via non-zero wl_surface.attach offsets, which is a protocol violation
from v5 on. Advertise v4 so those offsets are accepted and ignored,
like before the v5 breaking change. */
server.compositor = wlr_compositor_create(server.wl_display, 4,
server.renderer);
wlr_subcompositor_create(server.wl_display);
wlr_shm_create_with_renderer(server.wl_display, 1, server.renderer);
wlr_linux_dmabuf_v1_create_with_renderer(server.wl_display, 5, server.renderer);
wlr_data_device_manager_create(server.wl_display);
wlr_data_control_manager_v1_create(server.wl_display);
/* Direct scanout policy:
- standalone (DRM/VT console): ENABLED. Scanout presents a fullscreen
client's buffer straight to the display -- true zero-copy, no
composite, no blit. An attach-render lock is held while the tab
overlay is up (see update_overlay_visible) so the overlay's second
pass lands on the composited frame instead of being painted onto
the client's own buffer.
- nested: DISABLED. A "scanned-out" buffer on the headless output is
displayed nowhere by itself; kick must still blit every presented
buffer into the host window, importing the *client's* dmabuf into
the host EGL context each frame. VLC's scanout-feedback-tuned
buffers reject that import per frame (EGL_BAD_PARAMETER "modifier
attributes not equal") and the video goes black behind playing
audio. Revisit if Mesa/wlroots ever accept those buffers here;
KICK_NESTED_SCANOUT=1 forces it back on for testing either way. */
if (!server.standalone && !getenv("KICK_NESTED_SCANOUT"))
setenv("WLR_SCENE_DISABLE_DIRECT_SCANOUT", "1", 1);
server.scene = wlr_scene_create();
server.xdg_shell = wlr_xdg_shell_create(server.wl_display, 6);
/* Layer-shell (waybar/panels): the surfaces live in an always-on-top
scene tree, kept a sibling of the tab window trees so tabs and the bar
never interfere. */
wl_list_init(&server.layer_surfaces);
server.layer_tree = wlr_scene_tree_create(&server.scene->tree);
/* Dedicated tree for parentless popups (bars' menus): rooted at the
output origin so their geometry maps directly to pixels. */
server.popup_tree = wlr_scene_tree_create(&server.scene->tree);
/* IME candidate popups: same always-on-top treatment as layer_tree. */
server.input_popup_tree = wlr_scene_tree_create(&server.scene->tree);
wl_list_init(&server.input_popups);
wl_list_init(&server.input_methods);
server.layer_shell = wlr_layer_shell_v1_create(server.wl_display, 3);
server.new_layer_surface.notify = handle_new_layer_surface;
wl_signal_add(&server.layer_shell->events.new_surface,
&server.new_layer_surface);
/* Passive protocol globals that cost one global each and let clients run
at their best: presentation-time for frame pacing, xdg-output for
logical output geometry, viewporter for viewport-scaled buffers (e.g.
video). wlr_scene applies viewports to xdg surfaces automatically. */
server.presentation = wlr_presentation_create(server.wl_display,
server.backend, 1);
server.viewporter = wlr_viewporter_create(server.wl_display);
/* Content-type hints plus single-pixel buffers: one global each, fully
passive (wlroots tags surfaces and allocates 1x1 buffers itself). */
server.content_type_mgr =
wlr_content_type_manager_v1_create(server.wl_display, 1);
server.single_pixel_mgr =
wlr_single_pixel_buffer_manager_v1_create(server.wl_display);
/* Let nested clients pick their cursor shape (cursor-shape-v1); the
manager is passive, so we handle request_set_shape ourselves below:
apply it to the standalone cursor or forward it to the host pointer. */
server.shape_mgr = wlr_cursor_shape_manager_v1_create(server.wl_display, 1);
if (server.shape_mgr) {
server.shape_listener.notify = handle_shape_set;
wl_signal_add(&server.shape_mgr->events.request_set_shape,
&server.shape_listener);
}
server.seat = wlr_seat_create(server.wl_display, "kick");
wlr_seat_set_capabilities(server.seat,
WL_SEAT_CAPABILITY_POINTER | WL_SEAT_CAPABILITY_KEYBOARD |
WL_SEAT_CAPABILITY_TOUCH);
#if HAVE_XWAYLAND
/* XWayland: X11 apps get tabs like Wayland clients. Lazy start keeps an
idle session free of an Xwayland process; display_name is reserved at
create time, so launch_client can export DISPLAY right away. The XWM
bridges ICCCM focus and X11 selections onto the seat, which rides the
existing clipboard bridge out to the host. */
if (!getenv("KICK_NO_XWAYLAND")) {
/* Run our own plain Xwayland: ignore any WLR_XWAYLAND wrapper the
environment may point at (e.g. one that forces `-auth` and the
legacy X11 cookie dance). wlroots then execs the compiled-in
Xwayland with no -auth, so local clients connect freely and we
never touch the session Xauthority file. */
unsetenv("WLR_XWAYLAND");
server.xwayland = wlr_xwayland_create(server.wl_display,
server.compositor, true);
if (server.xwayland) {
wl_list_init(&server.or_windows);
wl_list_init(&server.x11_pendings);
wlr_xwayland_set_seat(server.xwayland, server.seat);
server.xwayland_new_surface.notify = handle_xwayland_new_surface;
wl_signal_add(&server.xwayland->events.new_surface,
&server.xwayland_new_surface);
server.xwayland_ready.notify = handle_xwayland_ready;
wl_signal_add(&server.xwayland->events.ready,
&server.xwayland_ready);
server.xwayland_destroy.notify = handle_xwayland_destroy;
wl_signal_add(&server.xwayland->events.destroy,
&server.xwayland_destroy);
} else {
kick_log(KICK_LOG_INFO, "kick: XWayland unavailable "
"(no Xwayland binary?)\n");
}
}
#endif
/* Pointer constraints + relative pointer: games and creative apps ask for
these to grab the cursor and to get raw relative motion. The constraint
is activated/deactivated on seat pointer focus change; relative deltas
are forwarded from the input paths. */
server.pointer_constraints = wlr_pointer_constraints_v1_create(server.wl_display);
server.relative_pointer_mgr = wlr_relative_pointer_manager_v1_create(server.wl_display);
server.seat_pointer_focus.notify = handle_seat_pointer_focus;
wl_signal_add(&server.seat->pointer_state.events.focus_change,
&server.seat_pointer_focus);
/* Pointer gestures: touchpad swipe/pinch/hold fan out to gesture
clients holding seat pointer focus (see the gesture section;
libinput devices feed it in standalone mode, the stdin feed in
any mode). */
server.gestures = wlr_pointer_gestures_v1_create(server.wl_display);
/* Text input + input method (OSK/IME): advertise both managers so
in-session clients and IMEs (fcitx5, OSKs) can bind; the relay between
the focused field and the IME runs off the seat's keyboard focus
(see handle_seat_keyboard_focus). */
server.text_input_mgr =
wlr_text_input_manager_v3_create(server.wl_display);
server.input_method_mgr =
wlr_input_method_manager_v2_create(server.wl_display);
server.text_input_new.notify = handle_text_input_new;
wl_signal_add(&server.text_input_mgr->events.text_input,
&server.text_input_new);
server.input_method_new.notify = handle_input_method_new;
wl_signal_add(&server.input_method_mgr->events.input_method,
&server.input_method_new);
server.seat_keyboard_focus.notify = handle_seat_keyboard_focus;
wl_signal_add(&server.seat->keyboard_state.events.focus_change,
&server.seat_keyboard_focus);
/* Primary selection (zwp_primary_selection_v1): advertise the manager so
clients like text editors can set the selection with their own serial
(no roundtrip needed); the request handler installs it on the seat,
which distributes it to the other focused tab clients. */
server.primary_selection_mgr =
wlr_primary_selection_v1_device_manager_create(server.wl_display);
server.request_set_primary_selection.notify = seat_request_set_primary_selection;
wl_signal_add(&server.seat->events.request_set_primary_selection,
&server.request_set_primary_selection);
/* The request_set_selection handler is what actually performs the
wlr_seat_set_selection for clients using the data-control manager; the
host-forwarding it triggers is a no-op without an outer host (backend
NONE), so standalone needs it too or wl-copy-style clipboard requests
are silently dropped. */
bridge_attach_seat();
/* Foreign toplevel management: let taskbars/switchers (waybar taskbar,
disorder, etc.) enumerate kick's windows and request activation/close.
One wlr-foreign handle plus one ext-foreign handle per live window;
sync happens in foreign_sync_* and the window claim/teardown paths. */
server.foreign_mgr = wlr_foreign_toplevel_manager_v1_create(server.wl_display);
server.ext_foreign_list = wlr_ext_foreign_toplevel_list_v1_create(server.wl_display, 1);
/* Idle notification: report user inactivity and honor idle-inhibit.
Activity is claimed on every input event (keyboard/pointer/touch);
an inhibitor flips the notifier to inhibited so a screenblank/DPMS
consumer stays awake while a client asks. */
server.idle_notifier = wlr_idle_notifier_v1_create(server.wl_display);
wl_list_init(&server.idle_inhibitors);
server.idle_inhibit_mgr = wlr_idle_inhibit_v1_create(server.wl_display);
server.idle_new_inhibitor.notify = handle_idle_new_inhibitor;
wl_signal_add(&server.idle_inhibit_mgr->events.new_inhibitor,
&server.idle_new_inhibitor);
/* Session lock (ext-session-lock-v1): let a lock client (swaylock) grab
the session and blank the screen. While locked, no window may take
focus and the grab chords are swallowed (see process_key_event). */
server.session_lock_manager =
wlr_session_lock_manager_v1_create(server.wl_display);
server.session_lock_new_lock.notify = handle_session_lock_new_lock;
wl_signal_add(&server.session_lock_manager->events.new_lock,
&server.session_lock_new_lock);
/* Screen capture (wlr-screencopy-unstable-v1), for grim & co. wlroots
runs the whole capture flow itself off the output commit path. */
server.screencopy_mgr = wlr_screencopy_manager_v1_create(server.wl_display);
/* Tearing-control + fractional-scale: the shown surface's tearing hint
drives the commit's async-flip flag (see apply_tearing_hint), and
surfaces learn the output scale at claim. */
server.tearing_mgr = wlr_tearing_control_manager_v1_create(server.wl_display, 1);
server.tearing_new_object.notify = handle_tearing_new_object;
wl_signal_add(&server.tearing_mgr->events.new_object,
&server.tearing_new_object);
server.fractional_scale_mgr =
wlr_fractional_scale_manager_v1_create(server.wl_display, 1);
/* Keyboard shortcuts inhibit: let a focused fullscreen client grab the
compositor's chords (see kb_inhibit_focused / process_key_event). */
server.kb_inhibit_mgr =
wlr_keyboard_shortcuts_inhibit_v1_create(server.wl_display);
server.kb_inhibit_new_inhibitor.notify = handle_kb_inhibit_new_inhibitor;
wl_signal_add(&server.kb_inhibit_mgr->events.new_inhibitor,
&server.kb_inhibit_new_inhibitor);
/* Output power management: blank/unblank the single output on demand.
Starts powered; set_mode toggles the scene tree (see handler). */
server.output_powered = true;
server.output_power_mgr =
wlr_output_power_manager_v1_create(server.wl_display);
server.output_power_set_mode.notify = handle_output_power_set_mode;
wl_signal_add(&server.output_power_mgr->events.set_mode,
&server.output_power_set_mode);
/* Gamma control: night-light clients set the output ramp (see
handle_gamma_set); wlroots itself fails controls for outputs with
no LUT, so headless/nested clients learn it is unsupported. */
server.gamma_mgr = wlr_gamma_control_manager_v1_create(server.wl_display);
server.gamma_set.notify = handle_gamma_set;
wl_signal_add(&server.gamma_mgr->events.set_gamma, &server.gamma_set);
/* Virtual keyboard/pointer: synthesised input feeds the seat via the
same paths as real devices (see handle_virtual_kb_new/ptr_new). */
wl_list_init(&server.virtual_kbs);
wl_list_init(&server.virtual_ptrs);
server.virtual_kb_mgr =
wlr_virtual_keyboard_manager_v1_create(server.wl_display);
server.virtual_kb_new.notify = handle_virtual_kb_new;
wl_signal_add(&server.virtual_kb_mgr->events.new_virtual_keyboard,
&server.virtual_kb_new);
server.virtual_ptr_mgr =
wlr_virtual_pointer_manager_v1_create(server.wl_display);
server.virtual_ptr_new.notify = handle_virtual_ptr_new;
wl_signal_add(&server.virtual_ptr_mgr->events.new_virtual_pointer,
&server.virtual_ptr_new);
/* Xdg-activation: focus windows by token (see
handle_xdg_activation_request). */
server.xdg_activation = wlr_xdg_activation_v1_create(server.wl_display);
server.xdg_activation_request.notify = handle_xdg_activation_request;
wl_signal_add(&server.xdg_activation->events.request_activate,
&server.xdg_activation_request);
/* xdg-dialog: modal toplevels demand attention (see modal_activate).
Version 1 is the only one wlroots speaks. */
server.dialog_mgr = wlr_xdg_wm_dialog_v1_create(server.wl_display, 1);
server.dialog_new.notify = handle_dialog_new;
wl_signal_add(&server.dialog_mgr->events.new_dialog, &server.dialog_new);
/* The output layout exists in both modes so xdg-output can advertise
logical output geometry to clients; nested mode simply has one output
(the host window) in the layout. */
server.output_layout = wlr_output_layout_create(server.wl_display);
if (!server.output_layout) {
fprintf(stderr, "kick: failed to create output layout\n");
return 1;
}
server.xdg_output_mgr = wlr_xdg_output_manager_v1_create(server.wl_display,
server.output_layout);
/* Standalone has no host compositor to draw a pointer, so give the
output a real wlr_cursor. Theme/size follow the XDG cursor convention:
XCURSOR_THEME (default "default") and XCURSOR_SIZE (default 24px).
wlroots resolves the theme itself (search path, Inherits chains) and,
when nothing is installed, substitutes a builtin arrow -- so the pointer
is never invisible. We only report when the requested theme was
silently swapped for the builtin. */
if (server.standalone) {
server.cursor = wlr_cursor_create();
if (!server.cursor) {
fprintf(stderr, "kick: failed to create cursor\n");
return 1;
}
wlr_cursor_attach_output_layout(server.cursor, server.output_layout);
const char *theme_env = getenv("XCURSOR_THEME");
const char *theme = theme_env && *theme_env ? theme_env : "default";
uint32_t size = 24;
const char *size_env = getenv("XCURSOR_SIZE");
if (size_env) {
char *end = NULL;
unsigned long v = strtoul(size_env, &end, 10);
if (end != size_env && v > 0)
size = (uint32_t)v;
}
server.xcursor_mgr = wlr_xcursor_manager_create(theme, size);
if (server.xcursor_mgr)
wlr_xcursor_manager_load(server.xcursor_mgr, 1);
/* Detect the builtin from the manager's own state: wlr_xcursor_theme_load
renames the theme object to "default" when it substitutes the builtin
arrow (cursor_count == 0), so a mismatch with the requested name
means the theme didn't exist on disk. A theme literally named
"default" is indistinguishable (the builtin adopts that name), so
skip the warning there and only fail warm either way. */
struct wlr_xcursor *cur = server.xcursor_mgr ?
wlr_xcursor_manager_get_xcursor(server.xcursor_mgr, "default", 1)
: NULL;
if (cur && strcmp(theme, "default") != 0 &&
!wl_list_empty(&server.xcursor_mgr->scaled_themes)) {
struct wlr_xcursor_manager_theme *mt = wl_container_of(
server.xcursor_mgr->scaled_themes.next, mt, link);
if (mt->theme && mt->theme->name &&
strcmp(mt->theme->name, theme) != 0)
kick_log(KICK_LOG_INFO,
"[cursor] theme '%s' not found; wlroots builtin cursor "
"in use\n", theme);
}
if (!cur) {
kick_log(KICK_LOG_INFO,
"[cursor] no cursor theme available; no pointer shown\n");
} else {
wlr_cursor_set_xcursor(server.cursor, server.xcursor_mgr, "default");
wl_signal_add(&server.cursor->events.motion,
&standalone_cursor_motion_listener);
}
}
/* virtual keyboard fed from the host keyboard */
static const struct wlr_keyboard_impl keyboard_impl = {
.name = "kick-keyboard",
};
wlr_keyboard_init(&server.keyboard, &keyboard_impl, "kick-keyboard");
/* fallback keymap until the host sends one */
server.xkb_ctx = xkb_context_new(XKB_CONTEXT_NO_FLAGS);
if (server.xkb_ctx) {
xkb_context_set_log_level(server.xkb_ctx, XKB_LOG_LEVEL_DEBUG);
xkb_context_set_log_fn(server.xkb_ctx, kick_xkb_log);
struct xkb_rule_names names = {
.rules = NULL, .model = "pc105",
.layout = "us", .variant = NULL, .options = NULL,
};
server.xkb_keymap = xkb_keymap_new_from_names(
server.xkb_ctx, &names, XKB_KEYMAP_COMPILE_NO_FLAGS);
if (server.xkb_keymap) {
wlr_keyboard_set_keymap(&server.keyboard, server.xkb_keymap);
xkb_state_reload();
}
}
wlr_seat_set_keyboard(server.seat, &server.keyboard);
server.new_output.notify = handle_new_output;
wl_signal_add(&server.backend->events.new_output, &server.new_output);
server.new_toplevel.notify = handle_new_toplevel;
wl_signal_add(&server.xdg_shell->events.new_toplevel, &server.new_toplevel);
server.new_popup.notify = handle_new_popup;
wl_signal_add(&server.xdg_shell->events.new_popup, &server.new_popup);
/* Standalone: attach the native (libinput) input devices to the seat. */
if (server.standalone) {
server.new_input.notify = handle_new_input;
wl_signal_add(&server.backend->events.new_input, &server.new_input);
}
/* The headless backend (nested always, and standalone under
WLR_BACKENDS=headless when no real display is available) has no
outputs of its own, so add ours manually; DRM emits its outputs via
new_output. new_output fires during backend start. */
if (!server.standalone || server.standalone_headless) {
int w = server.standalone && mode_req_w > 0 ? mode_req_w : 1280;
int h = server.standalone && mode_req_h > 0 ? mode_req_h : 800;
host.width = w;
host.height = h;
wlr_headless_add_output(server.backend, host.width, host.height);
}
if (!wlr_backend_start(server.backend)) {
fprintf(stderr, "kick: failed to start backend\n");
return 1;
}
if (wl_display_add_socket(server.wl_display, kick_socket) < 0) {
fprintf(stderr, "kick: failed to add socket '%s': %s\n",
kick_socket, strerror(errno));
return 1;
}
/* Standalone mode presents onto the native output directly; nested mode
connects to the host compositor and presents inside it. */
if (!server.standalone && !host_init()) {
fprintf(stderr, "kick: could not start nested session\n");
remove_socket_file();
return 1;
}
kick_log(KICK_LOG_INFO, "Wayland socket: %s\n", kick_socket);
/* Build the tab list: one tab per command-line command, in command-line
order, each carrying a still-black pending window the command's client
claims when it connects (the process-group match in
handle_new_toplevel puts each client on its own slot no matter which
connects first). */
wl_list_init(&server.tabs);
int focus_idx = start_cmd_index >= 0 ? start_cmd_index : total_apps - 1;
struct kick_tab *focus_tab = NULL;
for (int i = 0; i < total_apps; i++) {
struct kick_tab *tab = calloc(1, sizeof(*tab));
if (!tab) {
remove_socket_file();
return 1;
}
wl_list_init(&tab->windows);
wl_list_insert(server.tabs.prev, &tab->link);
struct kick_window *w = window_alloc(tab);
if (!w) {
remove_socket_file();
return 1;
}
const char *cmd = default_tab ? term_cmd : appv[i];
w->cmd = strdup(cmd);
w->pid = -1;
w->origin = ORIGIN_CLI;
/* Live-but-black until the command claims the slot with a toplevel. */
w->pending_claim = true;
if (i == focus_idx)
focus_tab = tab;
if (cmd[0] == '-') {
if (i > 0) {
fprintf(stderr,
"kick: warning: %s starts with '-'; it is "
"run as its own tab, not an option to %s\n"
" If intended, quote it: \"%s %s\"\n",
cmd, appv[i - 1], appv[i - 1], cmd);
} else {
fprintf(stderr,
"kick: warning: %s starts with '-'; if this "
"is meant for a first command, quote them together, "
"e.g. \"%s\"\n",
cmd, cmd);
}
}
}
/* The selected command-line tab is active from the very first frame:
black, titled by its command line, until the client maps. The user
waits only on that one tab. --start-cmd-index picks it (1-based);
without the flag the last command is the one shown, so the startup tab
is always the one the caller can count on. */
set_active_tab(focus_tab);
/* Fork every command-line command at once; the process-group match in
handle_new_toplevel gives each its own slot on arrival. */
launch_all_cli();
/* The --panel command, if any: a layer-shell client, forked separately since
it never claims a tab. */
launch_panel();
const char *prefix = tab_prefix == PREFIX_SUPER ? "Super" : "Alt";
kick_log(KICK_LOG_INFO, "kick: running. "
"%s+Up/Down switches tabs; %s+Shift+Up/Down reorders; "
"%s+Delete closes the active window (or the tab when it's the only window); "
"%s+Shift+T opens a terminal (%s).\n",
prefix, prefix, prefix, prefix, term_cmd);
/* Standalone event loop: no host display, so drive the server loop alone.
The native output's frame signal (or the headless 60Hz timer) wakes the
dispatcher and triggers a render. The loop fd is polled directly and
dispatched with timeout 0: dispatch(-1) would re-poll inside libwayland
after draining the SIGUSR1 self-pipe and never return, leaving the gate
below unevaluated on an idle screen. */
if (server.standalone) {
int server_loop_fd = wl_event_loop_get_fd(server.loop);
for (;;) {
struct pollfd fds[1] = {
{ .fd = server_loop_fd, .events = POLLIN },
};
int ret;
do {
ret = poll(fds, 1, -1);
} while (ret < 0 && errno == EINTR);
if (ret < 0)
continue;
do {
ret = wl_event_loop_dispatch(server.loop, 0);
} while (ret == -1 && errno == EINTR);
wl_display_flush_clients(server.wl_display);
sweep_dead_startup();
if (server.output && (wlr_output_is_headless(server.output)
|| !server.output->frame_pending)
&& (needs_redraw || server.output->needs_frame)) {
frame_pending = false;
needs_redraw = false;
render_and_present();
}
}
}
/* Nested event loop: service the server, the host display, and libdecor
(whose decoration plugin runs its own event handling). */
int server_fd = wl_event_loop_get_fd(server.loop);
int host_fd = wl_display_get_fd(host.display);
int decor_fd = host.libdecor ? libdecor_get_fd(host.libdecor) : -1;
for (;;) {
wl_display_dispatch_pending(host.display);
if (host.use_libdecor)
libdecor_dispatch(host.libdecor, 0);
/* Flush queued nested-client messages before blocking: a data-control
`send` queued while dispatching the host side would otherwise sit
in the client connection until some later event wakes the poll
below, stalling host-pasted clipboard data for seconds. */
wl_display_flush_clients(server.wl_display);
/* Never block in a host read: use the non-blocking prepare/read
pattern so the server loop (headless frame timer) is always
serviced while waiting on the host socket. */
if (wl_display_prepare_read(host.display) == 0) {
wl_display_flush(host.display);
struct pollfd fds[3] = {
{ .fd = server_fd, .events = POLLIN },
{ .fd = host_fd, .events = POLLIN },
{ .fd = decor_fd, .events = POLLIN },
};
int nfds = decor_fd >= 0 ? 3 : 2;
int ret;
do {
ret = poll(fds, nfds, -1);
} while (ret < 0 && errno == EINTR);
if (ret > 0 && (fds[1].revents & (POLLIN | POLLERR)))
wl_display_read_events(host.display);
else
wl_display_cancel_read(host.display);
if (ret > 0 && (fds[0].revents & (POLLIN | POLLERR)))
wl_event_loop_dispatch(server.loop, 0);
} else {
wl_event_loop_dispatch(server.loop, 0);
}
wl_display_flush_clients(server.wl_display);
sweep_dead_startup();
wl_display_dispatch_pending(host.display);
if (host.use_libdecor)
libdecor_dispatch(host.libdecor, 0);
/* Render only when something changed (kick's own redraws or scene
damage) and no page flip is in flight; an idle screen never
repaints. wl_scene schedules its own frame wake on client
damage, so a dirty scene always gets here. */
if (server.output && (wlr_output_is_headless(server.output)
|| !server.output->frame_pending)
&& (needs_redraw || server.output->needs_frame)) {
frame_pending = false;
needs_redraw = false;
render_and_present();
}
wl_display_flush(host.display);
}
/* Unreachable in practice: every shutdown path exits via
shutdown_cleanup(). Kept for completeness. */
shutdown_cleanup();
return 0;
}
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