chrome/browser/sessions/tab_loader_delegate.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_SESSIONS_TAB_LOADER_DELEGATE_H_
   6 #define CHROME_BROWSER_SESSIONS_TAB_LOADER_DELEGATE_H_
   7
   8 #include "base/memory/scoped_ptr.h"
   9 #include "base/time/time.h"
  10
  11 class TabLoaderCallback {
  12  public:
  13   // This function will get called to suppress and to allow tab loading. Tab
  14   // loading is initially enabled.
  15   virtual void SetTabLoadingEnabled(bool enable_tab_loading) = 0;
  16 };
  17
  18 // TabLoaderDelegate is created once the SessionRestore process is complete and
  19 // the loading of hidden tabs starts.
  20 class TabLoaderDelegate {
  21  public:
  22   TabLoaderDelegate() {}
  23   virtual ~TabLoaderDelegate() {}
  24
  25   // Create a tab loader delegate. |TabLoaderCallback::SetTabLoadingEnabled| can
  26   // get called to disable / enable tab loading.
  27   // The callback object is valid as long as this object exists.
  28   static scoped_ptr<TabLoaderDelegate> Create(TabLoaderCallback* callback);
  29
  30   // Returns the default timeout time after which the first non-visible tab
  31   // gets loaded if the first (visible) tab did not finish loading.
  32   virtual base::TimeDelta GetFirstTabLoadingTimeout() const = 0;
  33
  34   // Returns the default timeout time after which the next tab gets loaded if
  35   // the previous tab did not finish loading.
  36   virtual base::TimeDelta GetTimeoutBeforeLoadingNextTab() const = 0;
  37 };
  38
  39 #endif  // CHROME_BROWSER_SESSIONS_TAB_LOADER_DELEGATE_H_