MacViews: Implement text input.

ui/views/cocoa/bridged_native_widget.h

 // Copyright 2014 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #ifndef UI_VIEWS_COCOA_BRIDGED_NATIVE_WIDGET_H_
 #define UI_VIEWS_COCOA_BRIDGED_NATIVE_WIDGET_H_
 
 #import <Cocoa/Cocoa.h>
 
 #import "base/mac/scoped_nsobject.h"
 #include "base/memory/scoped_ptr.h"
+#import "ui/views/focus/focus_manager.h"
 #include "ui/views/ime/input_method_delegate.h"
 #include "ui/views/views_export.h"
 
 @class BridgedContentView;
 @class ViewsNSWindowDelegate;
 
 namespace ui {
 class InputMethod;
 }
 
 namespace views {
 
 class InputMethod;
 class NativeWidgetMac;
 class View;
 
 // A bridge to an NSWindow managed by an instance of NativeWidgetMac or
 // DesktopNativeWidgetMac. Serves as a helper class to bridge requests from the
 // NativeWidgetMac to the Cocoa window. Behaves a bit like an aura::Window.
-class VIEWS_EXPORT BridgedNativeWidget : public internal::InputMethodDelegate {
+class VIEWS_EXPORT BridgedNativeWidget : public internal::InputMethodDelegate,
+                                         public FocusChangeListener {
  public:
   // Creates one side of the bridge. |parent| can be NULL in tests.
   BridgedNativeWidget(NativeWidgetMac* parent);
   virtual ~BridgedNativeWidget();
 
   // Initialize the bridge, "retains" ownership of |window|.
   void Init(base::scoped_nsobject<NSWindow> window);
 
   // Set or clears the views::View bridged by the content view. This does NOT
   // take ownership of |view|.
   void SetRootView(views::View* view);
 
   // See widget.h for documentation.
   InputMethod* CreateInputMethod();
   ui::InputMethod* GetHostInputMethod();
 
   NativeWidgetMac* native_widget_mac() { return native_widget_mac_; }
   BridgedContentView* ns_view() { return bridged_view_; }
   NSWindow* ns_window() { return window_; }
 
   // Overridden from internal::InputMethodDelegate:
   virtual void DispatchKeyEventPostIME(const ui::KeyEvent& key) OVERRIDE;
 
  private:
   views::NativeWidgetMac* native_widget_mac_;  // Weak. Owns this.
   base::scoped_nsobject<NSWindow> window_;
   base::scoped_nsobject<ViewsNSWindowDelegate> window_delegate_;
   base::scoped_nsobject<BridgedContentView> bridged_view_;
   scoped_ptr<ui::InputMethod> input_method_;
+  FocusManager* focus_manager_;  // Weak. Owned by our Widget.
+                                 // Will be NULL if native_widget_mac_ is NULL.
+
+  // Overridden from FocusChangeListener:
+  virtual void OnWillChangeFocus(View* focused_before,
+                                 View* focused_now) OVERRIDE;
+  virtual void OnDidChangeFocus(View* focused_before,
+                                View* focused_now) OVERRIDE;
 
   DISALLOW_COPY_AND_ASSIGN(BridgedNativeWidget);
 };
 
 }  // namespace views
 
 #endif  // UI_VIEWS_COCOA_BRIDGED_NATIVE_WIDGET_H_