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
10class GURL;
11
12namespace ui {
13class OSExchangeData;
14}
15
16namespace content {
17class WebContents;
18struct DropData;
19
20// An optional delegate that listens for drags of bookmark data.
21class 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_
47