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      1 // Copyright 2014 The Chromium Authors. All rights reserved.
      2 // Use of this source code is governed by a BSD-style license that can be
      3 // found in the LICENSE file.
      4 
      5 #ifndef UI_VIEWS_COCOA_BRIDGED_NATIVE_WIDGET_H_
      6 #define UI_VIEWS_COCOA_BRIDGED_NATIVE_WIDGET_H_
      7 
      8 #import <Cocoa/Cocoa.h>
      9 
     10 #import "base/mac/scoped_nsobject.h"
     11 #include "base/memory/scoped_ptr.h"
     12 #import "ui/views/focus/focus_manager.h"
     13 #include "ui/views/ime/input_method_delegate.h"
     14 #include "ui/views/views_export.h"
     15 #include "ui/views/widget/widget.h"
     16 
     17 @class BridgedContentView;
     18 @class ViewsNSWindowDelegate;
     19 
     20 namespace ui {
     21 class InputMethod;
     22 }
     23 
     24 namespace views {
     25 
     26 class InputMethod;
     27 class NativeWidgetMac;
     28 class View;
     29 
     30 // A bridge to an NSWindow managed by an instance of NativeWidgetMac or
     31 // DesktopNativeWidgetMac. Serves as a helper class to bridge requests from the
     32 // NativeWidgetMac to the Cocoa window. Behaves a bit like an aura::Window.
     33 class VIEWS_EXPORT BridgedNativeWidget : public internal::InputMethodDelegate,
     34                                          public FocusChangeListener {
     35  public:
     36   // Creates one side of the bridge. |parent| must not be NULL.
     37   explicit BridgedNativeWidget(NativeWidgetMac* parent);
     38   virtual ~BridgedNativeWidget();
     39 
     40   // Initialize the bridge, "retains" ownership of |window|.
     41   void Init(base::scoped_nsobject<NSWindow> window,
     42             const Widget::InitParams& params);
     43 
     44   // Sets or clears the focus manager to use for tracking focused views.
     45   // This does NOT take ownership of |focus_manager|.
     46   void SetFocusManager(FocusManager* focus_manager);
     47 
     48   // Set or clears the views::View bridged by the content view. This does NOT
     49   // take ownership of |view|.
     50   void SetRootView(views::View* view);
     51 
     52   // Called internally by the NSWindowDelegate when the window is closing.
     53   void OnWindowWillClose();
     54 
     55   // See widget.h for documentation.
     56   InputMethod* CreateInputMethod();
     57   ui::InputMethod* GetHostInputMethod();
     58 
     59   NativeWidgetMac* native_widget_mac() { return native_widget_mac_; }
     60   BridgedContentView* ns_view() { return bridged_view_; }
     61   NSWindow* ns_window() { return window_; }
     62 
     63   // Overridden from internal::InputMethodDelegate:
     64   virtual void DispatchKeyEventPostIME(const ui::KeyEvent& key) OVERRIDE;
     65 
     66  private:
     67   // Closes all child windows. BridgedNativeWidget children will be destroyed.
     68   void RemoveOrDestroyChildren();
     69 
     70   views::NativeWidgetMac* native_widget_mac_;  // Weak. Owns this.
     71   base::scoped_nsobject<NSWindow> window_;
     72   base::scoped_nsobject<ViewsNSWindowDelegate> window_delegate_;
     73   base::scoped_nsobject<BridgedContentView> bridged_view_;
     74   scoped_ptr<ui::InputMethod> input_method_;
     75   FocusManager* focus_manager_;  // Weak. Owned by our Widget.
     76 
     77   // Overridden from FocusChangeListener:
     78   virtual void OnWillChangeFocus(View* focused_before,
     79                                  View* focused_now) OVERRIDE;
     80   virtual void OnDidChangeFocus(View* focused_before,
     81                                 View* focused_now) OVERRIDE;
     82 
     83   DISALLOW_COPY_AND_ASSIGN(BridgedNativeWidget);
     84 };
     85 
     86 }  // namespace views
     87 
     88 #endif  // UI_VIEWS_COCOA_BRIDGED_NATIVE_WIDGET_H_
     89