Support custom drag-and-drop of bookmarks in Aura

chrome/browser/tab_contents/web_drag_bookmark_handler_aura.h

+// Copyright (c) 2012 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_WEB_DRAG_BOOKMARK_HANDLER_AURA_H_
+#define CHROME_BROWSER_TAB_CONTENTS_WEB_DRAG_BOOKMARK_HANDLER_AURA_H_
+#pragma once
+
+#include "content/public/browser/web_contents.h"
+#include "content/public/browser/web_drag_dest_delegate.h"
+#include "chrome/browser/bookmarks/bookmark_node_data.h"
+
+class TabContentsWrapper;
+
+// Chrome needs to intercept content drag events so it can dispatch them to the
+// bookmarks and extensions system.
+// Note that unlike the other platforms, Aura doesn't use all of the
+// WebDragDest infrastructure, just the WebDragDestDelegate.
+class WebDragBookmarkHandlerAura : public content::WebDragDestDelegate {
+ public:
+  WebDragBookmarkHandlerAura();
+  virtual ~WebDragBookmarkHandlerAura();
+
+  // Overridden from content::WebDragDestDelegate:
+  virtual void DragInitialize(content::WebContents* contents) OVERRIDE;
+  virtual void OnDragOver() OVERRIDE;
+  virtual void OnDragEnter() OVERRIDE;
+  virtual void OnDrop() OVERRIDE;
+  virtual void OnDragLeave() OVERRIDE;
+
+  virtual void OnReceiveDragData(const ui::OSExchangeData& data) OVERRIDE;
+
+ private:
+  // The TabContentsWrapper for the drag.
+  // Weak reference; may be NULL if the contents aren't contained in a wrapper
+  // (e.g. WebUI dialogs).
+  TabContentsWrapper* tab_;
+
+  // The bookmark data for the active drag.  Empty when there is no active drag.
+  BookmarkNodeData bookmark_drag_data_;
+
+  DISALLOW_COPY_AND_ASSIGN(WebDragBookmarkHandlerAura);
+};
+
+#endif  // CHROME_BROWSER_TAB_CONTENTS_WEB_DRAG_BOOKMARK_HANDLER_AURA_H_