chrome/browser/ui/zoom/chrome_zoom_level_otr_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_UI_ZOOM_CHROME_ZOOM_LEVEL_OTR_DELEGATE_H_
   6 #define CHROME_BROWSER_UI_ZOOM_CHROME_ZOOM_LEVEL_OTR_DELEGATE_H_
   7
   8 #include "base/macros.h"
   9 #include "base/memory/ref_counted.h"
  10 #include "base/memory/weak_ptr.h"
  11 #include "content/public/browser/host_zoom_map.h"
  12 #include "content/public/browser/zoom_level_delegate.h"
  13
  14 namespace ui_zoom {
  15 class ZoomEventManager;
  16 }
  17
  18 // This class is a light-weight version of ChromeZoomLevelPrefs and is used
  19 // to connect an OTR StoragePartition's HostZoomMap to the OTR profile's
  20 // ZoomEventManager.
  21 class ChromeZoomLevelOTRDelegate : public content::ZoomLevelDelegate {
  22  public:
  23   ChromeZoomLevelOTRDelegate(
  24       base::WeakPtr<ui_zoom::ZoomEventManager> zoom_event_manager);
  25   ~ChromeZoomLevelOTRDelegate() override;
  26
  27   // content::ZoomLevelDelegate
  28   void InitHostZoomMap(content::HostZoomMap* host_zoom_map) override;
  29
  30  private:
  31   // This is a callback function that receives notifications from HostZoomMap
  32   // when per-host zoom levels change. It is used to update the per-host
  33   // zoom levels (if any) managed by this class (for its associated partition).
  34   void OnZoomLevelChanged(const content::HostZoomMap::ZoomLevelChange& change);
  35
  36   base::WeakPtr<ui_zoom::ZoomEventManager> zoom_event_manager_;
  37   content::HostZoomMap* host_zoom_map_;
  38   scoped_ptr<content::HostZoomMap::Subscription> zoom_subscription_;
  39
  40   DISALLOW_COPY_AND_ASSIGN(ChromeZoomLevelOTRDelegate);
  41 };
  42
  43 #endif  // CHROME_BROWSER_UI_ZOOM_CHROME_ZOOM_LEVEL_OTR_DELEGATE_H_