view: fix xdg_toplevel fullscreen request handling

river/View.zig

@@ -215,10 +215,30 @@ pub fn setFocused(self: *Self, focused: bool) void {
     }
 }
 
-/// Set the pending state to fullscren and inform the client. Should be
+/// Set the pending state, set the size, and inform the client.
-/// followed by starting a transaction to apply the pending state.
 pub fn setFullscreen(self: *Self, fullscreen: bool) void {
     self.pending.fullscreen = fullscreen;
+
+    if (fullscreen) {
+        // If transitioning from float -> fullscreen, save the floating
+        // dimensions.
+        if (self.pending.float) self.float_box = self.current.box;
+
+        const output = self.output;
+        self.pending.box = Box.fromWlrBox(
+            c.wlr_output_layout_get_box(output.root.wlr_output_layout, output.wlr_output).*,
+        );
+        self.configure();
+    } else if (self.pending.float) {
+        // If transitioning from fullscreen -> float, return to the saved
+        // floating dimensions.
+        self.pending.box = self.float_box;
+        self.configure();
+    } else {
+        // Transitioning to layout, arrange and start a transaction
+        self.output.root.arrange();
+    }
+
     switch (self.impl) {
         .xdg_toplevel => |xdg_toplevel| xdg_toplevel.setFullscreen(fullscreen),
         .xwayland_view => |xwayland_view| xwayland_view.setFullscreen(fullscreen),

river/XdgToplevel.zig

@@ -287,5 +287,4 @@ fn handleRequestFullscreen(listener: ?*c.wl_listener, data: ?*c_void) callconv(.
     const self = @fieldParentPtr(Self, "listen_request_fullscreen", listener.?);
     const event = util.voidCast(c.wlr_xdg_toplevel_set_fullscreen_event, data.?);
     self.view.setFullscreen(event.fullscreen);
-    self.view.output.root.arrange();
 }

river/command/toggle_fullscreen.zig

@@ -39,25 +39,5 @@ pub fn toggleFullscreen(
         if (seat.input_manager.isCursorActionTarget(view)) return;
 
         view.setFullscreen(!view.pending.fullscreen);
-
-        if (view.pending.fullscreen) {
-            // If transitioning from float -> fullscreen, save the floating
-            // dimensions.
-            if (view.pending.float) view.float_box = view.current.box;
-
-            const output = view.output;
-            view.pending.box = Box.fromWlrBox(
-                c.wlr_output_layout_get_box(output.root.wlr_output_layout, output.wlr_output).*,
-            );
-            view.configure();
-        } else if (view.pending.float) {
-            // If transitioning from fullscreen -> float, return to the saved
-            // floating dimensions.
-            view.pending.box = view.float_box;
-            view.configure();
-        } else {
-            // Transitioning to layout, arrange and start a transaction
-            view.output.root.arrange();
-        }
     }
 }