| // Copyright 2014 The Chromium Authors. All rights reserved. |
| // Use of this source code is governed by a BSD-style license that can be |
| // found in the LICENSE file. |
| |
| #ifndef CHROME_BROWSER_UI_ZOOM_CHROME_ZOOM_LEVEL_PREFS_H_ |
| #define CHROME_BROWSER_UI_ZOOM_CHROME_ZOOM_LEVEL_PREFS_H_ |
| |
| #include "base/callback.h" |
| #include "base/files/file_path.h" |
| #include "base/macros.h" |
| #include "base/memory/ref_counted.h" |
| #include "base/memory/weak_ptr.h" |
| #include "base/observer_list.h" |
| #include "components/prefs/json_pref_store.h" |
| #include "components/prefs/pref_change_registrar.h" |
| #include "components/prefs/pref_service.h" |
| #include "components/prefs/pref_store.h" |
| #include "content/public/browser/host_zoom_map.h" |
| #include "content/public/browser/zoom_level_delegate.h" |
| |
| namespace base { |
| class DictionaryValue; |
| } |
| |
| namespace zoom { |
| class ZoomEventManager; |
| } |
| |
| // A class to manage per-partition default and per-host zoom levels in Chrome's |
| // preference system. It implements an interface between the content/ zoom |
| // levels in HostZoomMap and Chrome's preference system. All changes |
| // to the per-partition default zoom levels from chrome/ flow through this |
| // class. Any changes to per-host levels are updated when HostZoomMap calls |
| // OnZoomLevelChanged. |
| class ChromeZoomLevelPrefs : public content::ZoomLevelDelegate { |
| public: |
| typedef base::CallbackList<void(void)>::Subscription |
| DefaultZoomLevelSubscription; |
| |
| // Initialize the pref_service and the partition_key via the constructor, |
| // as these concepts won't be available in the content base class |
| // ZoomLevelDelegate, which will define the InitHostZoomMap interface. |
| // |pref_service_| must outlive this class. |
| ChromeZoomLevelPrefs( |
| PrefService* pref_service, |
| const base::FilePath& profile_path, |
| const base::FilePath& partition_path, |
| base::WeakPtr<zoom::ZoomEventManager> zoom_event_manager); |
| ~ChromeZoomLevelPrefs() override; |
| |
| static std::string GetPartitionKeyForTesting( |
| const base::FilePath& relative_path); |
| |
| void SetDefaultZoomLevelPref(double level); |
| double GetDefaultZoomLevelPref() const; |
| std::unique_ptr<DefaultZoomLevelSubscription> |
| RegisterDefaultZoomLevelCallback(const base::Closure& callback); |
| |
| void ExtractPerHostZoomLevels( |
| const base::DictionaryValue* host_zoom_dictionary, |
| bool sanitize_partition_host_zoom_levels); |
| |
| // content::ZoomLevelDelegate |
| void InitHostZoomMap(content::HostZoomMap* host_zoom_map) override; |
| |
| private: |
| // This is a callback function that receives notifications from HostZoomMap |
| // when per-host zoom levels change. It is used to update the per-host |
| // zoom levels (if any) managed by this class (for its associated partition). |
| void OnZoomLevelChanged(const content::HostZoomMap::ZoomLevelChange& change); |
| |
| PrefService* pref_service_; |
| base::WeakPtr<zoom::ZoomEventManager> zoom_event_manager_; |
| content::HostZoomMap* host_zoom_map_; |
| std::unique_ptr<content::HostZoomMap::Subscription> zoom_subscription_; |
| std::string partition_key_; |
| base::CallbackList<void(void)> default_zoom_changed_callbacks_; |
| |
| DISALLOW_COPY_AND_ASSIGN(ChromeZoomLevelPrefs); |
| }; |
| |
| #endif // CHROME_BROWSER_UI_ZOOM_CHROME_ZOOM_LEVEL_PREFS_H_ |