Handle {exit_}fullscreen_requested events on Windows

docs/TODO.md

@@ -2,6 +2,7 @@
 
 These are in rough order of my priority, though no promises I do them in this order.
 
+- [ ] Use set_xcursor_theme request
 - [ ] Add focused window title to bar
 - [ ] Support overriding config location
 - [ ] Support configuring primary vs secondary stack side

src/Context.zig

@@ -54,7 +54,7 @@ pub const Options = struct {
 
     river_input_manager_v1: *river.InputManagerV1,
     river_libinput_config_v1: *river.LibinputConfigV1,
-    river_layer_shell_v1: *river.LayerShellV1, // TODO
+    river_layer_shell_v1: *river.LayerShellV1,
     river_window_manager_v1: *river.WindowManagerV1,
     river_xkb_bindings_v1: *river.XkbBindingsV1,
 

src/Output.zig

@@ -626,9 +626,10 @@ fn calculateLayout(output: *Output) void {
         // window rules are reflected in the first frame's layout.
         window.initialize();
         if (output.tags & window.tags != 0x0000) {
-            // Floating windows should be shown but not included in this layout generation
+            // Fullscreen and floating windows should be shown but not included in layout generation
+            const will_be_fullscreen = window.pending_manage.fullscreen orelse window.fullscreen;
             const will_float = window.pending_manage.floating orelse window.floating;
-            if (!will_float) {
+            if (!will_be_fullscreen and !will_float) {
                 active_count += 1;
                 active_list.append(&window.active_list_node);
             }

src/Window.zig

@@ -193,6 +193,7 @@ fn windowListener(river_window_v1: *river.WindowV1, event: river.WindowV1.Event,
                 null;
         },
         .parent => |ev| {
+            // Nothing to do if ev.parent is null
             const parent = ev.parent orelse return;
             window.parent = parent;
 
@@ -204,6 +205,23 @@ fn windowListener(river_window_v1: *river.WindowV1, event: river.WindowV1.Event,
                 .y = parent_window.rect.y + @divTrunc(parent_window.rect.height, 2),
             };
         },
+        .fullscreen_requested => |ev| {
+            window.pending_manage.fullscreen = true;
+
+            // This event allows the window to provide an output preference,
+            // so we should move the window if it wants
+            if (ev.output) |river_output_v1| {
+                if (river_output_v1.getUserData()) |user_data| {
+                    const output: *Output = @ptrCast(@alignCast(user_data));
+                    // We have to remove window from current output's windows list first
+                    window.link.remove();
+                    output.windows.append(window);
+
+                    window.pending_manage.pending_output = .{ .output = output };
+                }
+            }
+        },
+        .exit_fullscreen_requested => window.pending_manage.fullscreen = false,
         else => |ev| {
             log.debug("unhandled event: {s}", .{@tagName(ev)});
         },