content/public/browser/web_drag_dest_delegate.h

   1 // Copyright (c) 2012 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 CONTENT_PUBLIC_BROWSER_WEB_DRAG_DEST_DELEGATE_H_
   6 #define CONTENT_PUBLIC_BROWSER_WEB_DRAG_DEST_DELEGATE_H_
   7
   8 #include "base/strings/string16.h"
   9
  10 class GURL;
  11
  12 namespace ui {
  13 class OSExchangeData;
  14 }
  15
  16 namespace content {
  17 class WebContents;
  18 struct DropData;
  19
  20 // An optional delegate that listens for drags of bookmark data.
  21 class WebDragDestDelegate {
  22  public:
  23   // Announces that a drag has started. It's valid that a drag starts, along
  24   // with over/enter/leave/drop notifications without receiving any bookmark
  25   // data.
  26   virtual void DragInitialize(WebContents* contents) = 0;
  27
  28   // Notifications of drag progression.
  29   virtual void OnDragOver() = 0;
  30   virtual void OnDragEnter() = 0;
  31   virtual void OnDrop() = 0;
  32   // This should also clear any state kept about this drag.
  33   virtual void OnDragLeave() = 0;
  34
  35 #if defined(USE_AURA)
  36   // Called at the start of every drag to supply the data associated with the
  37   // drag.
  38   virtual void OnReceiveDragData(const ui::OSExchangeData& data) = 0;
  39 #endif  // USE_AURA
  40
  41   virtual ~WebDragDestDelegate() {}
  42 };
  43
  44 }  // namespace content
  45
  46 #endif  // CONTENT_PUBLIC_BROWSER_WEB_DRAG_DEST_DELEGATE_H_