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1 // Copyright (c) 2011 The Chromium Authors. All rights reserved. | 1 // Copyright (c) 2011 The Chromium Authors. All rights reserved. |
2 // Use of this source code is governed by a BSD-style license that can be | 2 // Use of this source code is governed by a BSD-style license that can be |
3 // found in the LICENSE file. | 3 // found in the LICENSE file. |
4 | 4 |
5 // Maps hostnames to custom zoom levels. Written on the UI thread and read on | 5 // Maps hostnames to custom zoom levels. Written on the UI thread and read on |
6 // any thread. One instance per browser context. | 6 // any thread. One instance per browser context. |
7 | 7 |
8 #ifndef CONTENT_BROWSER_HOST_ZOOM_MAP_H_ | 8 #ifndef CONTENT_BROWSER_HOST_ZOOM_MAP_H_ |
9 #define CONTENT_BROWSER_HOST_ZOOM_MAP_H_ | 9 #define CONTENT_BROWSER_HOST_ZOOM_MAP_H_ |
10 #pragma once | 10 #pragma once |
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24 namespace base { | 24 namespace base { |
25 class DictionaryValue; | 25 class DictionaryValue; |
26 } | 26 } |
27 | 27 |
28 class GURL; | 28 class GURL; |
29 | 29 |
30 // HostZoomMap needs to be deleted on the UI thread because it listens | 30 // HostZoomMap needs to be deleted on the UI thread because it listens |
31 // to notifications on there (and holds a NotificationRegistrar). | 31 // to notifications on there (and holds a NotificationRegistrar). |
32 class CONTENT_EXPORT HostZoomMap | 32 class CONTENT_EXPORT HostZoomMap |
33 : public content::NotificationObserver, | 33 : public content::NotificationObserver, |
34 public base::RefCountedThreadSafe<HostZoomMap, | 34 public base::RefCountedThreadSafe< |
35 BrowserThread::DeleteOnUIThread> { | 35 HostZoomMap, content::BrowserThread::DeleteOnUIThread> { |
36 public: | 36 public: |
37 explicit HostZoomMap(); | 37 explicit HostZoomMap(); |
38 explicit HostZoomMap(HostZoomMap* original); | 38 explicit HostZoomMap(HostZoomMap* original); |
39 | 39 |
40 // Returns the zoom level for the host or spec for a given url. The zoom | 40 // Returns the zoom level for the host or spec for a given url. The zoom |
41 // level is determined by the host portion of the URL, or (in the absence of | 41 // level is determined by the host portion of the URL, or (in the absence of |
42 // a host) the complete spec of the URL. In most cases, there is no custom | 42 // a host) the complete spec of the URL. In most cases, there is no custom |
43 // zoom level, and this returns the user's default zoom level. Otherwise, | 43 // zoom level, and this returns the user's default zoom level. Otherwise, |
44 // returns the saved zoom level, which may be positive (to zoom in) or | 44 // returns the saved zoom level, which may be positive (to zoom in) or |
45 // negative (to zoom out). | 45 // negative (to zoom out). |
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74 virtual void Observe(int type, | 74 virtual void Observe(int type, |
75 const content::NotificationSource& source, | 75 const content::NotificationSource& source, |
76 const content::NotificationDetails& details); | 76 const content::NotificationDetails& details); |
77 | 77 |
78 double default_zoom_level() const { return default_zoom_level_; } | 78 double default_zoom_level() const { return default_zoom_level_; } |
79 void set_default_zoom_level(double level) { default_zoom_level_ = level; } | 79 void set_default_zoom_level(double level) { default_zoom_level_ = level; } |
80 | 80 |
81 HostZoomMap* GetOriginal() const { return original_; } | 81 HostZoomMap* GetOriginal() const { return original_; } |
82 | 82 |
83 private: | 83 private: |
84 friend class base::RefCountedThreadSafe<HostZoomMap, | 84 friend class base::RefCountedThreadSafe< |
85 BrowserThread::DeleteOnUIThread>; | 85 HostZoomMap, content::BrowserThread::DeleteOnUIThread>; |
86 friend struct BrowserThread::DeleteOnThread<BrowserThread::UI>; | 86 friend struct content::BrowserThread::DeleteOnThread< |
| 87 content::BrowserThread::UI>; |
87 friend class DeleteTask<HostZoomMap>; | 88 friend class DeleteTask<HostZoomMap>; |
88 | 89 |
89 typedef std::map<std::string, double> HostZoomLevels; | 90 typedef std::map<std::string, double> HostZoomLevels; |
90 | 91 |
91 virtual ~HostZoomMap(); | 92 virtual ~HostZoomMap(); |
92 void Init(); | 93 void Init(); |
93 | 94 |
94 // Copy of the pref data, so that we can read it on the IO thread. | 95 // Copy of the pref data, so that we can read it on the IO thread. |
95 HostZoomLevels host_zoom_levels_; | 96 HostZoomLevels host_zoom_levels_; |
96 double default_zoom_level_; | 97 double default_zoom_level_; |
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111 // Used around accesses to |host_zoom_levels_|, |default_zoom_level_| and | 112 // Used around accesses to |host_zoom_levels_|, |default_zoom_level_| and |
112 // |temporary_zoom_levels_| to guarantee thread safety. | 113 // |temporary_zoom_levels_| to guarantee thread safety. |
113 mutable base::Lock lock_; | 114 mutable base::Lock lock_; |
114 | 115 |
115 content::NotificationRegistrar registrar_; | 116 content::NotificationRegistrar registrar_; |
116 | 117 |
117 DISALLOW_COPY_AND_ASSIGN(HostZoomMap); | 118 DISALLOW_COPY_AND_ASSIGN(HostZoomMap); |
118 }; | 119 }; |
119 | 120 |
120 #endif // CONTENT_BROWSER_HOST_ZOOM_MAP_H_ | 121 #endif // CONTENT_BROWSER_HOST_ZOOM_MAP_H_ |
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