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

1 files changed, 103 insertions, 0 deletions

diff --git a/widget/gtk/nsMenuBar.h b/widget/gtk/nsMenuBar.h
new file mode 100644
index 0000000000..9ce1796512
--- /dev/null
+++ b/widget/gtk/nsMenuBar.h
@@ -0,0 +1,103 @@
+/* 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 __nsMenuBar_h__
+#define __nsMenuBar_h__
+
+#include "mozilla/Attributes.h"
+#include "mozilla/UniquePtr.h"
+#include "nsCOMPtr.h"
+#include "nsString.h"
+
+#include "nsDbusmenu.h"
+#include "nsMenuContainer.h"
+#include "nsMenuObject.h"
+
+#include <gtk/gtk.h>
+
+class nsIAtom;
+class nsIContent;
+class nsIDOMEvent;
+class nsIDOMKeyEvent;
+class nsIWidget;
+class nsMenuBarDocEventListener;
+
+/*
+ * The menubar class. There is one of these per window (and the window
+ * owns its menubar). Each menubar has an object path, and the service is
+ * responsible for telling the desktop shell which object path corresponds
+ * to a particular window. A menubar and its hierarchy also own a
+ * nsNativeMenuDocListener.
+ */
+class nsMenuBar final : public nsMenuContainer {
+public:
+    ~nsMenuBar() override;
+
+    static mozilla::UniquePtr<nsMenuBar> Create(nsIWidget* aParent,
+                                                nsIContent* aMenuBarNode);
+
+    nsMenuObject::EType Type() const override;
+
+    bool IsBeingDisplayed() const override;
+
+    // Get the native window ID for this menubar
+    uint32_t WindowId() const;
+
+    // Get the object path for this menubar
+    nsAdoptingCString ObjectPath() const;
+
+    // Get the top-level GtkWindow handle
+    GtkWidget* TopLevelWindow() { return mTopLevel; }
+
+    // Called from the menuservice when the menubar is about to be registered.
+    // Causes the native menubar to be created, and the XUL menubar to be hidden
+    void Activate();
+
+    // Called from the menuservice when the menubar is no longer registered
+    // with the desktop shell. Will cause the XUL menubar to be shown again
+    void Deactivate();
+
+private:
+    class DocEventListener;
+    friend class nsMenuBarContentInsertedEvent;
+    friend class nsMenuBarContentRemovedEvent;
+
+    enum ModifierFlags {
+        eModifierShift = (1 << 0),
+        eModifierCtrl = (1 << 1),
+        eModifierAlt = (1 << 2),
+        eModifierMeta = (1 << 3)
+    };
+
+    nsMenuBar(nsIContent* aMenuBarNode);
+    nsresult Init(nsIWidget* aParent);
+    void Build();
+    void DisconnectDocumentEventListeners();
+    void SetShellShowingMenuBar(bool aShowing);
+    void Focus();
+    void Blur();
+    ModifierFlags GetModifiersFromEvent(nsIDOMKeyEvent* aEvent);
+    nsresult Keypress(nsIDOMEvent* aEvent);
+    nsresult KeyDown(nsIDOMEvent* aEvent);
+    nsresult KeyUp(nsIDOMEvent* aEvent);
+
+    void HandleContentInserted(nsIContent* aChild,
+                               nsIContent* aPrevSibling);
+    void HandleContentRemoved(nsIContent* aChild);
+
+    void OnContentInserted(nsIContent* aContainer, nsIContent* aChild,
+                           nsIContent* aPrevSibling) override;
+    void OnContentRemoved(nsIContent* aContainer, nsIContent* aChild) override;
+
+    GtkWidget* mTopLevel;
+    DbusmenuServer* mServer;
+    nsCOMPtr<nsIDOMEventTarget> mDocument;
+    RefPtr<DocEventListener> mEventListener;
+
+    uint32_t mAccessKey;
+    ModifierFlags mAccessKeyMask;
+    bool mIsActive;
+};
+
+#endif /* __nsMenuBar_h__ */