258 lines
10 KiB
Zig
258 lines
10 KiB
Zig
const std = @import("std");
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const c = @import("c.zig");
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const util = @import("util.zig");
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const DecorationManager = @import("decoration_manager.zig").DecorationManager;
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const Output = @import("output.zig").Output;
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const Root = @import("root.zig").Root;
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const Seat = @import("seat.zig").Seat;
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const View = @import("view.zig").View;
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const ViewStack = @import("view_stack.zig").ViewStack;
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pub const Server = struct {
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const Self = @This();
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allocator: *std.mem.Allocator,
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wl_display: *c.wl_display,
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wl_event_loop: *c.wl_event_loop,
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wlr_backend: *c.wlr_backend,
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wlr_renderer: *c.wlr_renderer,
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wlr_xdg_shell: *c.wlr_xdg_shell,
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decoration_manager: DecorationManager,
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root: Root,
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seat: Seat,
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listen_new_output: c.wl_listener,
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listen_new_xdg_surface: c.wl_listener,
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pub fn init(self: *Self, allocator: *std.mem.Allocator) !void {
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self.allocator = allocator;
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// The Wayland display is managed by libwayland. It handles accepting
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// clients from the Unix socket, managing Wayland globals, and so on.
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self.wl_display = c.wl_display_create() orelse
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return error.CantCreateWlDisplay;
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errdefer c.wl_display_destroy(self.wl_display);
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// Should never return null if the display was created successfully
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self.wl_event_loop = c.wl_display_get_event_loop(self.wl_display) orelse
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return error.CantGetEventLoop;
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// The wlr_backend abstracts the input/output hardware. Autocreate chooses
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// the best option based on the environment, for example DRM when run from
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// a tty or wayland if WAYLAND_DISPLAY is set.
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//
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// This frees itself.when the wl_display is destroyed.
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self.wlr_backend = c.river_wlr_backend_autocreate(self.wl_display) orelse
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return error.CantCreateWlrBackend;
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// If we don't provide a renderer, autocreate makes a GLES2 renderer for us.
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// The renderer is responsible for defining the various pixel formats it
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// supports for shared memory, this configures that for clients.
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self.wlr_renderer = c.river_wlr_backend_get_renderer(self.wlr_backend) orelse
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return error.CantGetWlrRenderer;
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// TODO: Handle failure after https://github.com/swaywm/wlroots/pull/2080
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c.wlr_renderer_init_wl_display(self.wlr_renderer, self.wl_display); // orelse
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// return error.CantInitWlDisplay;
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// These both free themselves when the wl_display is destroyed
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_ = c.wlr_compositor_create(self.wl_display, self.wlr_renderer) orelse
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return error.CantCreateWlrCompositor;
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_ = c.wlr_data_device_manager_create(self.wl_display) orelse
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return error.CantCreateWlrDataDeviceManager;
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self.wlr_xdg_shell = c.wlr_xdg_shell_create(self.wl_display) orelse
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return error.CantCreateWlrXdgShell;
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try self.decoration_manager.init(self);
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try self.root.init(self);
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try self.seat.init(self);
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// Register our listeners for new outputs and xdg_surfaces.
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self.listen_new_output.notify = handleNewOutput;
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c.wl_signal_add(&self.wlr_backend.events.new_output, &self.listen_new_output);
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self.listen_new_xdg_surface.notify = handleNewXdgSurface;
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c.wl_signal_add(&self.wlr_xdg_shell.events.new_surface, &self.listen_new_xdg_surface);
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}
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/// Free allocated memory and clean up
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pub fn destroy(self: Self) void {
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c.wl_display_destroy_clients(self.wl_display);
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c.wl_display_destroy(self.wl_display);
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self.root.destroy();
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}
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/// Create the socket, set WAYLAND_DISPLAY, and start the backend
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pub fn start(self: Self) !void {
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// Add a Unix socket to the Wayland display.
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const socket = c.wl_display_add_socket_auto(self.wl_display) orelse
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return error.CantAddSocket;
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// Start the backend. This will enumerate outputs and inputs, become the DRM
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// master, etc
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if (!c.river_wlr_backend_start(self.wlr_backend)) {
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return error.CantStartBackend;
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}
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// Set the WAYLAND_DISPLAY environment variable to our socket and run the
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// startup command if requested. */
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if (c.setenv("WAYLAND_DISPLAY", socket, 1) == -1) {
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return error.CantSetEnv;
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}
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}
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/// Enter the wayland event loop and block until the compositor is exited
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pub fn run(self: Self) void {
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c.wl_display_run(self.wl_display);
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}
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/// Handle all compositor keybindings
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/// Note: this is a hacky initial implementation for testing and will be rewritten eventually
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pub fn handleKeybinding(self: *Self, sym: c.xkb_keysym_t, modifiers: u32) bool {
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if (modifiers & @intCast(u32, c.WLR_MODIFIER_LOGO) == 0) {
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return false;
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}
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if (modifiers & @intCast(u32, c.WLR_MODIFIER_SHIFT) != 0) {
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switch (sym) {
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c.XKB_KEY_H => {
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//if (self.root.master_count < self.root.views.len) {
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self.root.master_count += 1;
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self.root.arrange();
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//}
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},
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c.XKB_KEY_L => {
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//if (self.root.master_count > 0) {
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self.root.master_count -= 1;
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self.root.arrange();
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//}
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},
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c.XKB_KEY_Return => {
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// Spawn an instance of alacritty
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// const argv = [_][]const u8{ "/bin/sh", "-c", "WAYLAND_DEBUG=1 alacritty" };
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const argv = [_][]const u8{ "/bin/sh", "-c", "alacritty" };
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const child = std.ChildProcess.init(&argv, std.heap.c_allocator) catch unreachable;
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std.ChildProcess.spawn(child) catch unreachable;
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},
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c.XKB_KEY_1 => {
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if (self.root.focused_view) |view| {
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view.pending_tags = 1 << 0;
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self.root.arrange();
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}
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},
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c.XKB_KEY_2 => {
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if (self.root.focused_view) |view| {
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view.pending_tags = 1 << 1;
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self.root.arrange();
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}
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},
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c.XKB_KEY_3 => {
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if (self.root.focused_view) |view| {
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view.pending_tags = 1 << 2;
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self.root.arrange();
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}
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},
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c.XKB_KEY_4 => {
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if (self.root.focused_view) |view| {
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view.pending_tags = 1 << 3;
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self.root.arrange();
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}
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},
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c.XKB_KEY_5 => {
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if (self.root.focused_view) |view| {
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view.pending_tags = 1 << 4;
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self.root.arrange();
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}
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},
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c.XKB_KEY_6 => {
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if (self.root.focused_view) |view| {
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view.pending_tags = 1 << 5;
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self.root.arrange();
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}
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},
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else => return false,
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}
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} else {
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switch (sym) {
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c.XKB_KEY_e => c.wl_display_terminate(self.wl_display),
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c.XKB_KEY_j => self.root.focusNextView(),
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c.XKB_KEY_k => self.root.focusPrevView(),
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c.XKB_KEY_h => {
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if (self.root.master_factor > 0.05) {
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self.root.master_factor = util.max(f64, self.root.master_factor - 0.05, 0.05);
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self.root.arrange();
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}
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},
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c.XKB_KEY_l => {
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if (self.root.master_factor < 0.95) {
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self.root.master_factor = util.min(f64, self.root.master_factor + 0.05, 0.95);
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self.root.arrange();
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}
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},
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c.XKB_KEY_Return => {
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if (self.root.focused_view) |current_focus| {
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const node = @fieldParentPtr(ViewStack.Node, "view", current_focus);
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if (node != self.root.views.first) {
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self.root.views.remove(node);
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self.root.views.push(node);
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self.root.arrange();
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}
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}
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},
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c.XKB_KEY_1 => {
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self.root.pending_focused_tags = 1 << 0;
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self.root.arrange();
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},
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c.XKB_KEY_2 => {
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self.root.pending_focused_tags = 1 << 1;
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self.root.arrange();
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},
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c.XKB_KEY_3 => {
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self.root.pending_focused_tags = 1 << 2;
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self.root.arrange();
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},
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c.XKB_KEY_4 => {
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self.root.pending_focused_tags = 1 << 3;
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self.root.arrange();
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},
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c.XKB_KEY_5 => {
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self.root.pending_focused_tags = 1 << 4;
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self.root.arrange();
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},
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c.XKB_KEY_6 => {
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self.root.pending_focused_tags = 1 << 5;
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self.root.arrange();
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},
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else => return false,
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}
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}
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return true;
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}
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fn handleNewOutput(listener: ?*c.wl_listener, data: ?*c_void) callconv(.C) void {
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const server = @fieldParentPtr(Server, "listen_new_output", listener.?);
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const wlr_output = @ptrCast(*c.wlr_output, @alignCast(@alignOf(*c.wlr_output), data));
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server.root.addOutput(wlr_output);
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}
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fn handleNewXdgSurface(listener: ?*c.wl_listener, data: ?*c_void) callconv(.C) void {
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// This event is raised when wlr_xdg_shell receives a new xdg surface from a
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// client, either a toplevel (application window) or popup.
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const server = @fieldParentPtr(Server, "listen_new_xdg_surface", listener.?);
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const wlr_xdg_surface = @ptrCast(*c.wlr_xdg_surface, @alignCast(@alignOf(*c.wlr_xdg_surface), data));
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if (wlr_xdg_surface.role != c.enum_wlr_xdg_surface_role.WLR_XDG_SURFACE_ROLE_TOPLEVEL) {
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// TODO: log
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return;
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}
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// toplevel surfaces are tracked and managed by the root
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server.root.addView(wlr_xdg_surface);
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}
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};
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