chrome/browser/lifetime/browser_close_manager.h

   1 // Copyright 2013 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_LIFETIME_BROWSER_CLOSE_MANAGER_H_
   6 #define CHROME_BROWSER_LIFETIME_BROWSER_CLOSE_MANAGER_H_
   7
   8 #include "base/callback_forward.h"
   9 #include "base/memory/ref_counted.h"
  10 #include "chrome/browser/ui/browser_list_observer.h"
  11
  12 class Browser;
  13
  14 // Manages confirming that browser windows are closeable and closing them at
  15 // shutdown.
  16 class BrowserCloseManager : public base::RefCounted<BrowserCloseManager>,
  17                             public chrome::BrowserListObserver {
  18  public:
  19   BrowserCloseManager();
  20
  21   // Starts closing all browser windows.
  22   void StartClosingBrowsers();
  23
  24   // BrowserListObserver:
  25   void OnBrowserAdded(Browser* browser) override;
  26   void OnBrowserRemoved(Browser* browser) override;
  27
  28  protected:
  29   friend class base::RefCounted<BrowserCloseManager>;
  30
  31   ~BrowserCloseManager() override;
  32
  33   virtual void ConfirmCloseWithPendingDownloads(
  34       int download_count,
  35       const base::Callback<void(bool)>& callback);
  36
  37  private:
  38   // Notifies all browser windows that the close is cancelled.
  39   void CancelBrowserClose();
  40
  41   // Checks whether all browser windows are ready to close and closes them if
  42   // they are.
  43   void TryToCloseBrowsers();
  44
  45   // Called to report whether a beforeunload dialog was accepted.
  46   void OnBrowserReportCloseable(bool proceed);
  47
  48   // Closes all browser windows.
  49   void CloseBrowsers();
  50
  51   // Checks whether there are any downloads in-progress and prompts the user to
  52   // cancel them. If there are no downloads or the user accepts the cancel
  53   // downloads dialog, CloseBrowsers is called to continue with the shutdown.
  54   // Otherwise, if the user declines to cancel downloads, the shutdown is
  55   // aborted and the downloads page is shown for each profile with in-progress
  56   // downloads.
  57   void CheckForDownloadsInProgress();
  58
  59   // Called to report whether downloads may be cancelled during shutdown.
  60   void OnReportDownloadsCancellable(bool proceed);
  61
  62   // The browser for which we are waiting for a callback to
  63   // OnBrowserReportCloseable.
  64   Browser* current_browser_;
  65
  66   // Whether we are currently iterating over browsers in CloseBrowsers().
  67   // No Browsers should be added or removed synchronously or concurrently,
  68   // except explicitly by CloseBrowsers().
  69   // This was added to investigate http://crbug.com/484951.
  70   // TODO(jackhou): Delete when no longer needed.
  71   bool iterating_over_browsers_during_shutdown_;
  72
  73   DISALLOW_COPY_AND_ASSIGN(BrowserCloseManager);
  74 };
  75
  76 #endif  // CHROME_BROWSER_LIFETIME_BROWSER_CLOSE_MANAGER_H_