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 CHROME_BROWSER_UI_VIEWS_FRAME_WEB_CONTENTS_CLOSE_HANDLER_H_
6#define CHROME_BROWSER_UI_VIEWS_FRAME_WEB_CONTENTS_CLOSE_HANDLER_H_
7
8#include "base/timer/timer.h"
9
10class WebContentsCloseHandlerDelegate;
11class WebContentsCloseHandlerTest;
12
13// WebContentsCloseHandler handles notifying its delegate at the right time
14// to clone and/or destroy the layer tree of the active tab. This is done so
15// that on closing a window the user sees the contents of the last active
16// tab rather than an empty rect.
17class WebContentsCloseHandler {
18 public:
19  explicit WebContentsCloseHandler(WebContentsCloseHandlerDelegate* delegate);
20  ~WebContentsCloseHandler();
21
22  // Invoked when a tab is inserted.
23  void TabInserted();
24
25  // Invoked when the active WebContents changes.
26  void ActiveTabChanged();
27
28  // Invoked when all the tabs are about to be closed.
29  void WillCloseAllTabs();
30
31  // Invoked when the close was canceled.
32  void CloseAllTabsCanceled();
33
34 private:
35  friend class WebContentsCloseHandlerTest;
36
37  // Invoked from the |timer_|. If hit it means enough time has expired after a
38  // close was canceled.
39  void OnStillHaventClosed();
40
41  WebContentsCloseHandlerDelegate* delegate_;
42
43  // If true, WillCloseAllTabs() has been invoked.
44  bool in_close_;
45
46  // Set to true if the active tab changes while closing (ActiveTabChanged()
47  // was invoked following a WillCloseAllTabs()).
48  bool tab_changed_after_clone_;
49
50  base::OneShotTimer<WebContentsCloseHandler> timer_;
51
52  DISALLOW_COPY_AND_ASSIGN(WebContentsCloseHandler);
53};
54
55#endif  // CHROME_BROWSER_UI_VIEWS_FRAME_WEB_CONTENTS_CLOSE_HANDLER_H_
56