chrome/browser/ui/views/frame/web_contents_close_handler.h

   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
  10 class WebContentsCloseHandlerDelegate;
  11 class 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.
  17 class 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_