Enable dragging of images to desktop (Finder), Preview, etc. (on Mac)....

chrome/browser/tab_contents/tab_contents_view_mac.h

 // Copyright (c) 2009 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 CHROME_BROWSER_TAB_CONTENTS_TAB_CONTENTS_VIEW_MAC_H_
 #define CHROME_BROWSER_TAB_CONTENTS_TAB_CONTENTS_VIEW_MAC_H_
 
 #import <Cocoa/Cocoa.h>
 
+#include <string>
+
 #include "base/gfx/size.h"
 #include "base/scoped_ptr.h"
 #include "base/scoped_nsobject.h"
 #include "chrome/browser/cocoa/base_view.h"
 #include "chrome/browser/tab_contents/tab_contents_view.h"
 #include "chrome/common/notification_registrar.h"
 
+class FilePath;
 class FindBarMac;
 @class SadTabView;
 class TabContentsViewMac;
+@class WebDragSource;
 @class WebDropTarget;
 
 @interface TabContentsViewCocoa : BaseView {
  @private
   TabContentsViewMac* tabContentsView_;  // WEAK; owns us
+  scoped_nsobject<WebDragSource> dragSource_;
   scoped_nsobject<WebDropTarget> dropTarget_;
 }
+
+// Expose this, since sometimes one needs both the NSView and the TabContents.
+- (TabContents*)tabContents;
 @end
 
 // Mac-specific implementation of the TabContentsView. It owns an NSView that
 // contains all of the contents of the tab and associated child views.
 class TabContentsViewMac : public TabContentsView,
                            public NotificationObserver {
  public:
   // The corresponding TabContents is passed in the constructor, and manages our
   // lifetime. This doesn't need to be the case, but is this way currently
   // because that's what was easiest when they were split.
   explicit TabContentsViewMac(TabContents* web_contents);
-  virtual ~TabContentsViewMac();
 
   // TabContentsView implementation --------------------------------------------
 
   virtual void CreateView();
   virtual RenderWidgetHostView* CreateViewForWidget(
       RenderWidgetHost* render_widget_host);
   virtual gfx::NativeView GetNativeView() const;
   virtual gfx::NativeView GetContentNativeView() const;
   virtual gfx::NativeWindow GetTopLevelNativeWindow() const;
   virtual void GetContainerBounds(gfx::Rect* out) const;
@@ skipping 19 matching lines @@
   virtual void TakeFocus(bool reverse);
   virtual void HandleKeyboardEvent(const NativeWebKeyboardEvent& event);
 
   // NotificationObserver implementation ---------------------------------------
 
   virtual void Observe(NotificationType type,
                        const NotificationSource& source,
                        const NotificationDetails& details);
 
  private:
-  // Returns a drag pasteboard filled with the appropriate data. The types are
-  // populated in decending order of richness.
-  NSPasteboard* FillDragData(const WebDropData& drop_data);
-
   // The Cocoa NSView that lives in the view hierarchy.
   scoped_nsobject<TabContentsViewCocoa> cocoa_view_;
 
   // The Cocoa NSView to restore the focus to when focus returns.
   scoped_nsobject<NSView> latent_focus_view_;
 
   // Used to get notifications about renderers coming and going.
   NotificationRegistrar registrar_;
 
   // Used to render the sad tab. This will be non-NULL only when the sad tab is
   // visible.
   scoped_nsobject<SadTabView> sad_tab_;
 
   // The page content's intrinsic width.
   int preferred_width_;
 
   DISALLOW_COPY_AND_ASSIGN(TabContentsViewMac);
 };
 
 #endif  // CHROME_BROWSER_TAB_CONTENTS_TAB_CONTENTS_VIEW_MAC_H_