Tiny Wayland compositor
This commit is contained in:
Drew DeVault
commit
5f4c64fbeb
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tinywl
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*-protocol.c
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*-protocol.h
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WAYLAND_PROTOCOLS=/usr/share/wayland-protocols
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xdg-shell-protocol.h:
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wayland-scanner server-header \
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$(WAYLAND_PROTOCOLS)/stable/xdg-shell/xdg-shell.xml $@
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xdg-shell-protocol.c: xdg-shell-protocol.h
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wayland-scanner private-code \
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$(WAYLAND_PROTOCOLS)/stable/xdg-shell/xdg-shell.xml $@
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tinywl: tinywl.c xdg-shell-protocol.h xdg-shell-protocol.c
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$(CC) $(CFLAGS) \
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-g -Werror -I. \
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-DWLR_USE_UNSTABLE \
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$(shell pkg-config --cflags --libs wlroots) \
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$(shell pkg-config --cflags --libs wayland-server) \
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$(shell pkg-config --cflags --libs xkbcommon) \
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-o $@ $<
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clean:
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rm -f tinywl xdg-shell-protocol.h xdg-shell-protocol.c
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.DEFAULT_GOAL=tinywl
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.PHONY: clean
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#define _POSIX_C_SOURCE 200112L
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#include <getopt.h>
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#include <stdbool.h>
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#include <stdlib.h>
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#include <stdio.h>
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#include <time.h>
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#include <unistd.h>
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#include <wayland-server.h>
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#include <wlr/backend.h>
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#include <wlr/render/wlr_renderer.h>
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#include <wlr/types/wlr_cursor.h>
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#include <wlr/types/wlr_compositor.h>
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#include <wlr/types/wlr_data_device.h>
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#include <wlr/types/wlr_input_device.h>
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#include <wlr/types/wlr_keyboard.h>
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#include <wlr/types/wlr_linux_dmabuf_v1.h>
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#include <wlr/types/wlr_matrix.h>
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#include <wlr/types/wlr_output.h>
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#include <wlr/types/wlr_output_layout.h>
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#include <wlr/types/wlr_pointer.h>
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#include <wlr/types/wlr_seat.h>
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#include <wlr/types/wlr_xcursor_manager.h>
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#include <wlr/types/wlr_xdg_shell.h>
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#include <wlr/util/log.h>
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#include <xkbcommon/xkbcommon.h>
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enum tinywl_cursor_mode {
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TINYWL_CURSOR_PASSTHROUGH,
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TINYWL_CURSOR_MOVE,
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TINYWL_CURSOR_RESIZE,
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};
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struct tinywl_server {
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struct wl_display *wl_display;
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struct wlr_backend *backend;
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struct wlr_renderer *renderer;
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struct wlr_xdg_shell *xdg_shell;
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struct wl_listener new_xdg_surface;
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struct wl_list views;
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struct wlr_cursor *cursor;
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struct wlr_xcursor_manager *cursor_mgr;
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struct wl_listener cursor_motion;
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struct wl_listener cursor_motion_absolute;
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struct wl_listener cursor_button;
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struct wl_listener cursor_axis;
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struct wlr_seat *seat;
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struct wl_listener new_input;
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struct wl_listener request_cursor;
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struct wl_list keyboards;
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enum tinywl_cursor_mode cursor_mode;
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struct tinywl_view *grabbed_view;
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double grab_x, grab_y;
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int grab_width, grab_height;
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uint32_t resize_edges;
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struct wlr_output_layout *output_layout;
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struct wl_list outputs;
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struct wl_listener new_output;
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};
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struct tinywl_output {
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struct wl_list link;
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struct tinywl_server *server;
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struct wlr_output *wlr_output;
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struct wl_listener frame;
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};
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struct tinywl_view {
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struct wl_list link;
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struct tinywl_server *server;
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struct wlr_xdg_surface *xdg_surface;
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struct wl_listener map;
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struct wl_listener unmap;
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struct wl_listener destroy;
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struct wl_listener request_move;
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struct wl_listener request_resize;
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bool mapped;
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int x, y;
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};
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struct tinywl_keyboard {
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struct wl_list link;
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struct tinywl_server *server;
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struct wlr_input_device *device;
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struct wl_listener modifiers;
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struct wl_listener key;
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};
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struct tinywl_pointer {
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struct wl_list link;
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struct tinywl_server *server;
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struct wlr_input_device *device;
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};
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static void keyboard_handle_modifiers(
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struct wl_listener *listener, void *data) {
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struct tinywl_keyboard *keyboard =
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wl_container_of(listener, keyboard, modifiers);
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wlr_seat_set_keyboard(keyboard->server->seat, keyboard->device);
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wlr_seat_keyboard_notify_modifiers(keyboard->server->seat,
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&keyboard->device->keyboard->modifiers);
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}
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static void keyboard_handle_key(
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struct wl_listener *listener, void *data) {
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struct tinywl_keyboard *keyboard =
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wl_container_of(listener, keyboard, key);
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struct wlr_event_keyboard_key *event = data;
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struct wlr_seat *seat = keyboard->server->seat;
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// TODO: keybindings for moving windows about
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wlr_seat_set_keyboard(seat, keyboard->device);
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wlr_seat_keyboard_notify_key(seat, event->time_msec,
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event->keycode, event->state);
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}
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static void server_new_keyboard(struct tinywl_server *server,
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struct wlr_input_device *device) {
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struct tinywl_keyboard *keyboard =
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calloc(1, sizeof(struct tinywl_keyboard));
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keyboard->server = server;
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keyboard->device = device;
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struct xkb_rule_names rules = { 0 };
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struct xkb_context *context = xkb_context_new(XKB_CONTEXT_NO_FLAGS);
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struct xkb_keymap *keymap = xkb_map_new_from_names(context, &rules,
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XKB_KEYMAP_COMPILE_NO_FLAGS);
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wlr_keyboard_set_keymap(device->keyboard, keymap);
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xkb_keymap_unref(keymap);
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xkb_context_unref(context);
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wlr_keyboard_set_repeat_info(device->keyboard, 25, 600);
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keyboard->modifiers.notify = keyboard_handle_modifiers;
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wl_signal_add(&device->keyboard->events.modifiers, &keyboard->modifiers);
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keyboard->key.notify = keyboard_handle_key;
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wl_signal_add(&device->keyboard->events.key, &keyboard->key);
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wlr_seat_set_keyboard(server->seat, device);
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wl_list_insert(&server->keyboards, &keyboard->link);
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}
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static void server_new_pointer(struct tinywl_server *server,
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struct wlr_input_device *device) {
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wlr_cursor_attach_input_device(server->cursor, device);
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}
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static void server_new_input(struct wl_listener *listener, void *data) {
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struct tinywl_server *server =
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wl_container_of(listener, server, new_input);
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struct wlr_input_device *device = data;
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switch (device->type) {
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case WLR_INPUT_DEVICE_KEYBOARD:
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server_new_keyboard(server, device);
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break;
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case WLR_INPUT_DEVICE_POINTER:
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server_new_pointer(server, device);
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break;
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}
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uint32_t caps = WL_SEAT_CAPABILITY_POINTER;
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if (!wl_list_empty(&server->keyboards)) {
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caps |= WL_SEAT_CAPABILITY_KEYBOARD;
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}
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wlr_seat_set_capabilities(server->seat, caps);
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}
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static void seat_request_cursor(struct wl_listener *listener, void *data) {
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struct tinywl_server *server = wl_container_of(
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listener, server, request_cursor);
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struct wlr_seat_pointer_request_set_cursor_event *event = data;
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struct wlr_seat_client *focused_client =
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server->seat->pointer_state.focused_client;
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if (focused_client == event->seat_client) {
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wlr_cursor_set_surface(server->cursor, event->surface,
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event->hotspot_x, event->hotspot_y);
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}
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}
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static bool view_at(struct tinywl_view *view,
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double lx, double ly, struct wlr_surface **surface,
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double *sx, double *sy) {
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double view_sx = lx - view->x;
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double view_sy = ly - view->y;
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struct wlr_surface_state *state = &view->xdg_surface->surface->current;
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struct wlr_box box = {
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.x = 0, .y = 0,
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.width = state->width, .height = state->height,
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};
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double _sx, _sy;
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struct wlr_surface *_surface = NULL;
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_surface = wlr_xdg_surface_surface_at(
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view->xdg_surface, view_sx, view_sy, &_sx, &_sy);
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if (_surface != NULL) {
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*sx = _sx;
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*sy = _sy;
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*surface = _surface;
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return true;
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}
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return false;
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}
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static struct tinywl_view *desktop_view_at(
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struct tinywl_server *server, double lx, double ly,
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struct wlr_surface **surface, double *sx, double *sy) {
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struct tinywl_view *view;
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wl_list_for_each(view, &server->views, link) {
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if (view_at(view, lx, ly, surface, sx, sy)) {
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return view;
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}
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}
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return NULL;
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}
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static void focus_view(struct tinywl_view *view, struct wlr_surface *surface) {
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struct tinywl_server *server = view->server;
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struct wlr_seat *seat = server->seat;
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struct wlr_surface *prev_surface = seat->keyboard_state.focused_surface;
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if (prev_surface == surface) {
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return;
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}
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if (prev_surface) {
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struct wlr_xdg_surface *previous = wlr_xdg_surface_from_wlr_surface(
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seat->keyboard_state.focused_surface);
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wlr_xdg_toplevel_set_activated(previous, false);
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}
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struct wlr_keyboard *keyboard = wlr_seat_get_keyboard(seat);
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wl_list_remove(&view->link);
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wl_list_insert(&server->views, &view->link);
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wlr_xdg_toplevel_set_activated(view->xdg_surface, true);
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wlr_seat_keyboard_notify_enter(seat, view->xdg_surface->surface,
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keyboard->keycodes, keyboard->num_keycodes, &keyboard->modifiers);
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}
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static void process_cursor_move(struct tinywl_server *server, uint32_t time) {
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server->grabbed_view->x = server->cursor->x - server->grab_x;
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server->grabbed_view->y = server->cursor->y - server->grab_y;
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}
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static void process_cursor_resize(struct tinywl_server *server, uint32_t time) {
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struct tinywl_view *view = server->grabbed_view;
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double dx = server->cursor->x - server->grab_x;
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double dy = server->cursor->y - server->grab_y;
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double x = view->x;
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double y = view->y;
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int width = server->grab_width;
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int height = server->grab_height;
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if (server->resize_edges & WLR_EDGE_TOP) {
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y = server->grab_y + dy;
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height -= dy;
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if (height < 1) {
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y += height;
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}
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} else if (server->resize_edges & WLR_EDGE_BOTTOM) {
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height += dy;
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}
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if (server->resize_edges & WLR_EDGE_LEFT) {
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x = server->grab_x + dx;
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width -= dx;
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if (width < 1) {
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x += width;
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}
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} else if (server->resize_edges & WLR_EDGE_RIGHT) {
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width += dx;
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}
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view->x = x;
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view->y = y;
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wlr_xdg_toplevel_set_size(view->xdg_surface, width, height);
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}
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static void process_cursor_motion(struct tinywl_server *server, uint32_t time) {
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if (server->cursor_mode == TINYWL_CURSOR_MOVE) {
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process_cursor_move(server, time);
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return;
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} else if (server->cursor_mode == TINYWL_CURSOR_RESIZE) {
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process_cursor_resize(server, time);
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return;
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}
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double sx, sy;
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struct wlr_seat *seat = server->seat;
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struct wlr_surface *surface;
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struct tinywl_view *view = desktop_view_at(server,
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server->cursor->x, server->cursor->y, &surface, &sx, &sy);
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if (!view) {
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wlr_xcursor_manager_set_cursor_image(
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server->cursor_mgr, "left_ptr", server->cursor);
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return;
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}
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if (surface) {
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bool focus_changed = seat->pointer_state.focused_surface != surface;
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wlr_seat_pointer_notify_enter(seat, surface, sx, sy);
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if (!focus_changed) {
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wlr_seat_pointer_notify_motion(seat, time, sx, sy);
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}
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} else {
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wlr_seat_pointer_clear_focus(seat);
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}
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}
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static void server_cursor_motion(struct wl_listener *listener, void *data) {
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struct tinywl_server *server =
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wl_container_of(listener, server, cursor_motion_absolute);
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struct wlr_event_pointer_motion *event = data;
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wlr_cursor_move(server->cursor, event->device,
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event->delta_x, event->delta_y);
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process_cursor_motion(server, event->time_msec);
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}
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static void server_cursor_motion_absolute(
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struct wl_listener *listener, void *data) {
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struct tinywl_server *server =
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wl_container_of(listener, server, cursor_motion_absolute);
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struct wlr_event_pointer_motion_absolute *event = data;
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wlr_cursor_warp_absolute(server->cursor, event->device, event->x, event->y);
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process_cursor_motion(server, event->time_msec);
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}
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static void server_cursor_button(struct wl_listener *listener, void *data) {
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struct tinywl_server *server =
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wl_container_of(listener, server, cursor_button);
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struct wlr_event_pointer_button *event = data;
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wlr_seat_pointer_notify_button(server->seat,
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event->time_msec, event->button, event->state);
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double sx, sy;
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struct wlr_seat *seat = server->seat;
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struct wlr_surface *surface;
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struct tinywl_view *view = desktop_view_at(server,
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server->cursor->x, server->cursor->y, &surface, &sx, &sy);
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if (event->state == WLR_BUTTON_RELEASED) {
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server->cursor_mode = TINYWL_CURSOR_PASSTHROUGH;
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} else {
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focus_view(view, surface);
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}
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}
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static void server_cursor_axis(struct wl_listener *listener, void *data) {
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struct tinywl_server *server =
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wl_container_of(listener, server, cursor_axis);
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struct wlr_event_pointer_axis *event = data;
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wlr_seat_pointer_notify_axis(server->seat,
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event->time_msec, event->orientation, event->delta,
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event->delta_discrete, event->source);
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}
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struct render_data {
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struct wlr_output *output;
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struct wlr_renderer *renderer;
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struct tinywl_view *view;
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struct timespec *when;
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};
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static void render_surface(struct wlr_surface *surface,
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int sx, int sy, void *data) {
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struct render_data *rdata = data;
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struct tinywl_view *view = rdata->view;
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struct wlr_output *output = rdata->output;
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struct wlr_texture *texture = wlr_surface_get_texture(surface);
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if (texture == NULL) {
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return;
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}
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double ox, oy;
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wlr_output_layout_output_coords(
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view->server->output_layout, output, &ox, &oy);
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ox += view->x + sx, oy += view->y + sy;
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struct wlr_box box = {
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.x = ox * output->scale,
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.y = oy * output->scale,
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.width = surface->current.width * output->scale,
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.height = surface->current.height * output->scale,
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};
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float matrix[9];
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enum wl_output_transform transform =
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wlr_output_transform_invert(surface->current.transform);
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wlr_matrix_project_box(matrix, &box, transform, 0,
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output->transform_matrix);
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wlr_render_texture_with_matrix(rdata->renderer, texture, matrix, 1);
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wlr_surface_send_frame_done(surface, rdata->when);
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}
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static void output_frame(struct wl_listener *listener, void *data) {
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struct tinywl_output *output =
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wl_container_of(listener, output, frame);
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struct wlr_renderer *renderer = output->server->renderer;
|
||||
|
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struct timespec now;
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clock_gettime(CLOCK_MONOTONIC, &now);
|
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||||
wlr_output_make_current(output->wlr_output, NULL);
|
||||
int width, height;
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wlr_output_effective_resolution(output->wlr_output, &width, &height);
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wlr_renderer_begin(renderer, width, height);
|
||||
|
||||
float color[4] = {0.3, 0.3, 0.3, 1.0};
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||||
wlr_renderer_clear(renderer, color);
|
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|
||||
struct tinywl_view *view;
|
||||
wl_list_for_each_reverse(view, &output->server->views, link) {
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if (!view->mapped) {
|
||||
continue;
|
||||
}
|
||||
struct render_data rdata = {
|
||||
.output = output->wlr_output,
|
||||
.view = view,
|
||||
.renderer = renderer,
|
||||
.when = &now,
|
||||
};
|
||||
wlr_xdg_surface_for_each_surface(view->xdg_surface,
|
||||
render_surface, &rdata);
|
||||
}
|
||||
|
||||
wlr_output_swap_buffers(output->wlr_output, NULL, NULL);
|
||||
wlr_renderer_end(renderer);
|
||||
}
|
||||
|
||||
static void server_new_output(struct wl_listener *listener, void *data) {
|
||||
struct tinywl_server *server =
|
||||
wl_container_of(listener, server, new_output);
|
||||
struct wlr_output *wlr_output = data;
|
||||
|
||||
struct tinywl_output *output =
|
||||
calloc(1, sizeof(struct tinywl_output));
|
||||
output->wlr_output = wlr_output;
|
||||
output->server = server;
|
||||
output->frame.notify = output_frame;
|
||||
wl_signal_add(&wlr_output->events.frame, &output->frame);
|
||||
wl_list_insert(&server->outputs, &output->link);
|
||||
|
||||
wlr_output_layout_add_auto(server->output_layout, wlr_output);
|
||||
|
||||
wlr_output_create_global(wlr_output);
|
||||
}
|
||||
|
||||
static void xdg_surface_map(struct wl_listener *listener, void *data) {
|
||||
struct tinywl_view *view = wl_container_of(listener, view, map);
|
||||
view->mapped = true;
|
||||
focus_view(view, view->xdg_surface->surface);
|
||||
}
|
||||
|
||||
static void xdg_surface_unmap(struct wl_listener *listener, void *data) {
|
||||
struct tinywl_view *view = wl_container_of(listener, view, unmap);
|
||||
view->mapped = false;
|
||||
}
|
||||
|
||||
static void xdg_surface_destroy(struct wl_listener *listener, void *data) {
|
||||
struct tinywl_view *view = wl_container_of(listener, view, destroy);
|
||||
wl_list_remove(&view->link);
|
||||
free(view);
|
||||
}
|
||||
|
||||
static void begin_interactive(struct tinywl_view *view,
|
||||
enum tinywl_cursor_mode mode, uint32_t edges) {
|
||||
struct tinywl_server *server = view->server;
|
||||
struct wlr_surface *focused_surface =
|
||||
server->seat->pointer_state.focused_surface;
|
||||
if (view->xdg_surface->surface != focused_surface) {
|
||||
return;
|
||||
}
|
||||
server->grabbed_view = view;
|
||||
server->cursor_mode = mode;
|
||||
struct wlr_box geo_box;
|
||||
wlr_xdg_surface_get_geometry(view->xdg_surface, &geo_box);
|
||||
if (mode == TINYWL_CURSOR_MOVE) {
|
||||
server->grab_x = server->cursor->x - view->x;
|
||||
server->grab_y = server->cursor->y - view->y;
|
||||
} else {
|
||||
server->grab_x = server->cursor->x + geo_box.x;
|
||||
server->grab_y = server->cursor->y + geo_box.y;
|
||||
}
|
||||
server->grab_width = geo_box.width;
|
||||
server->grab_height = geo_box.height;
|
||||
server->resize_edges = edges;
|
||||
}
|
||||
|
||||
static void xdg_toplevel_request_move(
|
||||
struct wl_listener *listener, void *data) {
|
||||
struct tinywl_view *view = wl_container_of(listener, view, request_move);
|
||||
begin_interactive(view, TINYWL_CURSOR_MOVE, 0);
|
||||
}
|
||||
|
||||
static void xdg_toplevel_request_resize(
|
||||
struct wl_listener *listener, void *data) {
|
||||
struct wlr_xdg_toplevel_resize_event *event = data;
|
||||
struct tinywl_view *view = wl_container_of(listener, view, request_resize);
|
||||
begin_interactive(view, TINYWL_CURSOR_RESIZE, event->edges);
|
||||
}
|
||||
|
||||
static void server_new_xdg_surface(struct wl_listener *listener, void *data) {
|
||||
struct tinywl_server *server =
|
||||
wl_container_of(listener, server, new_xdg_surface);
|
||||
struct wlr_xdg_surface *xdg_surface = data;
|
||||
if (xdg_surface->role != WLR_XDG_SURFACE_ROLE_TOPLEVEL) {
|
||||
return;
|
||||
}
|
||||
|
||||
struct tinywl_view *view =
|
||||
calloc(1, sizeof(struct tinywl_view));
|
||||
view->server = server;
|
||||
view->xdg_surface = xdg_surface;
|
||||
|
||||
view->map.notify = xdg_surface_map;
|
||||
wl_signal_add(&xdg_surface->events.map, &view->map);
|
||||
view->unmap.notify = xdg_surface_unmap;
|
||||
wl_signal_add(&xdg_surface->events.unmap, &view->unmap);
|
||||
view->destroy.notify = xdg_surface_destroy;
|
||||
wl_signal_add(&xdg_surface->events.destroy, &view->destroy);
|
||||
|
||||
struct wlr_xdg_toplevel *toplevel = xdg_surface->toplevel;
|
||||
view->request_move.notify = xdg_toplevel_request_move;
|
||||
wl_signal_add(&toplevel->events.request_move, &view->request_move);
|
||||
view->request_resize.notify = xdg_toplevel_request_resize;
|
||||
wl_signal_add(&toplevel->events.request_resize, &view->request_resize);
|
||||
|
||||
wl_list_insert(&server->views, &view->link);
|
||||
}
|
||||
|
||||
int main(int argc, char *argv[]) {
|
||||
char *startup_cmd = NULL;
|
||||
|
||||
int c;
|
||||
while ((c = getopt(argc, argv, "s:h")) != -1) {
|
||||
switch (c) {
|
||||
case 's':
|
||||
startup_cmd = optarg;
|
||||
break;
|
||||
default:
|
||||
printf("Usage: %s [-s startup command]\n", argv[0]);
|
||||
return 0;
|
||||
}
|
||||
}
|
||||
if (optind < argc) {
|
||||
printf("Usage: %s [-s startup command]\n", argv[0]);
|
||||
return 0;
|
||||
}
|
||||
|
||||
struct tinywl_server server;
|
||||
server.wl_display = wl_display_create();
|
||||
server.backend = wlr_backend_autocreate(server.wl_display, NULL);
|
||||
|
||||
server.renderer = wlr_backend_get_renderer(server.backend);
|
||||
wlr_renderer_init_wl_display(server.renderer, server.wl_display);
|
||||
|
||||
wlr_compositor_create(server.wl_display, server.renderer);
|
||||
wlr_linux_dmabuf_v1_create(server.wl_display, server.renderer);
|
||||
wlr_data_device_manager_create(server.wl_display);
|
||||
|
||||
server.output_layout = wlr_output_layout_create();
|
||||
|
||||
wl_list_init(&server.outputs);
|
||||
server.new_output.notify = server_new_output;
|
||||
wl_signal_add(&server.backend->events.new_output, &server.new_output);
|
||||
|
||||
wl_list_init(&server.views);
|
||||
server.xdg_shell = wlr_xdg_shell_create(server.wl_display);
|
||||
server.new_xdg_surface.notify = server_new_xdg_surface;
|
||||
wl_signal_add(&server.xdg_shell->events.new_surface,
|
||||
&server.new_xdg_surface);
|
||||
|
||||
server.cursor = wlr_cursor_create();
|
||||
wlr_cursor_attach_output_layout(server.cursor, server.output_layout);
|
||||
|
||||
server.cursor_mgr = wlr_xcursor_manager_create(NULL, 24);
|
||||
wlr_xcursor_manager_load(server.cursor_mgr, 1);
|
||||
|
||||
server.cursor_motion.notify = server_cursor_motion;
|
||||
wl_signal_add(&server.cursor->events.motion, &server.cursor_motion);
|
||||
server.cursor_motion_absolute.notify = server_cursor_motion_absolute;
|
||||
wl_signal_add(&server.cursor->events.motion_absolute,
|
||||
&server.cursor_motion_absolute);
|
||||
server.cursor_button.notify = server_cursor_button;
|
||||
wl_signal_add(&server.cursor->events.button, &server.cursor_button);
|
||||
server.cursor_axis.notify = server_cursor_axis;
|
||||
wl_signal_add(&server.cursor->events.axis, &server.cursor_axis);
|
||||
|
||||
wl_list_init(&server.keyboards);
|
||||
server.new_input.notify = server_new_input;
|
||||
wl_signal_add(&server.backend->events.new_input, &server.new_input);
|
||||
server.seat = wlr_seat_create(server.wl_display, "seat0");
|
||||
server.request_cursor.notify = seat_request_cursor;
|
||||
wl_signal_add(&server.seat->events.request_set_cursor,
|
||||
&server.request_cursor);
|
||||
|
||||
const char *socket = wl_display_add_socket_auto(server.wl_display);
|
||||
if (!socket) {
|
||||
wlr_backend_destroy(server.backend);
|
||||
return 1;
|
||||
}
|
||||
|
||||
if (!wlr_backend_start(server.backend)) {
|
||||
wlr_backend_destroy(server.backend);
|
||||
wl_display_destroy(server.wl_display);
|
||||
return 1;
|
||||
}
|
||||
|
||||
setenv("WAYLAND_DISPLAY", socket, true);
|
||||
if (startup_cmd) {
|
||||
if (fork() == 0) {
|
||||
execl("/bin/sh", "/bin/sh", "-c", startup_cmd, (void *)NULL);
|
||||
}
|
||||
}
|
||||
wl_display_run(server.wl_display);
|
||||
|
||||
wl_display_destroy_clients(server.wl_display);
|
||||
wl_display_destroy(server.wl_display);
|
||||
return 0;
|
||||
}
|
||||
Loading…
Reference in New Issue