Issue MoonchildProductions/UXP#1578 - Add global menubar support for GTK

1 files changed, 80 insertions, 0 deletions

diff --git a/widget/gtk/nsNativeMenuService.h b/widget/gtk/nsNativeMenuService.h
new file mode 100644
index 0000000000..5ce022526d
--- /dev/null
+++ b/widget/gtk/nsNativeMenuService.h
@@ -0,0 +1,80 @@
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
+
+#ifndef __nsNativeMenuService_h__
+#define __nsNativeMenuService_h__
+
+#include "mozilla/Attributes.h"
+#include "nsCOMPtr.h"
+#include "nsDataHashtable.h"
+#include "nsINativeMenuService.h"
+#include "nsTArray.h"
+
+#include <gdk/gdk.h>
+#include <gio/gio.h>
+#include <gtk/gtk.h>
+
+class nsMenuBar;
+
+/*
+ * The main native menu service singleton. nsWebShellWindow calls in to this when
+ * a new top level window is created.
+ *
+ * Menubars are owned by their nsWindow. This service holds a weak reference to
+ * each menubar for the purpose of re-registering them with the shell if it
+ * needs to. The menubar is responsible for notifying the service when the last
+ * reference to it is dropped.
+ */
+class nsNativeMenuService final : public nsINativeMenuService {
+public:
+    NS_DECL_ISUPPORTS
+
+    NS_IMETHOD CreateNativeMenuBar(nsIWidget* aParent, nsIContent* aMenuBarNode) override;
+
+    // Returns the singleton addref'd for the service manager
+    static already_AddRefed<nsNativeMenuService> GetInstanceForServiceManager();
+
+    // Returns the singleton without increasing the reference count
+    static nsNativeMenuService* GetSingleton();
+
+    // Called by a menubar when it is deleted
+    void NotifyNativeMenuBarDestroyed(nsMenuBar* aMenuBar);
+
+private:
+    nsNativeMenuService();
+    ~nsNativeMenuService();
+    nsresult Init();
+
+    static void EnsureInitialized();
+    void SetOnline(bool aOnline);
+    void RegisterNativeMenuBar(nsMenuBar* aMenuBar);
+    static void name_owner_changed_cb(GObject* gobject,
+                                      GParamSpec* pspec,
+                                      gpointer user_data);
+    static void proxy_created_cb(GObject* source_object,
+                                 GAsyncResult* res,
+                                 gpointer user_data);
+    static void register_native_menubar_cb(GObject* source_object,
+                                           GAsyncResult* res,
+                                           gpointer user_data);
+    static gboolean map_event_cb(GtkWidget* widget, GdkEvent* event,
+                                 gpointer user_data);
+    void OnNameOwnerChanged();
+    void OnProxyCreated(GDBusProxy* aProxy);
+    void OnNativeMenuBarRegistered(nsMenuBar* aMenuBar,
+                                   bool aSuccess);
+    static void PrefChangedCallback(const char* aPref, void* aClosure);
+    void PrefChanged();
+
+    GCancellable* mCreateProxyCancellable;
+    GDBusProxy* mDbusProxy;
+    bool mOnline;
+    nsTArray<nsMenuBar* > mMenuBars;
+    nsDataHashtable<nsPtrHashKey<nsMenuBar>, GCancellable*> mMenuBarRegistrationCancellables;
+
+    static bool sShutdown;
+    static nsNativeMenuService* sService;
+};
+
+#endif /* __nsNativeMenuService_h__ */