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1 // Copyright (c) 2012 The Chromium Authors. All rights reserved. | 1 // Copyright (c) 2012 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 #ifndef CONTENT_PUBLIC_BROWSER_HOST_ZOOM_MAP_H_ | 5 #ifndef CONTENT_PUBLIC_BROWSER_HOST_ZOOM_MAP_H_ |
6 #define CONTENT_PUBLIC_BROWSER_HOST_ZOOM_MAP_H_ | 6 #define CONTENT_PUBLIC_BROWSER_HOST_ZOOM_MAP_H_ |
7 | 7 |
8 #include <map> | 8 #include <map> |
9 #include <string> | 9 #include <string> |
10 #include <vector> | 10 #include <vector> |
11 | 11 |
12 #include "base/basictypes.h" | 12 #include "base/basictypes.h" |
13 #include "base/callback.h" | 13 #include "base/callback.h" |
14 #include "base/callback_list.h" | 14 #include "base/callback_list.h" |
15 #include "content/common/content_export.h" | 15 #include "content/common/content_export.h" |
16 | 16 |
17 namespace content { | 17 namespace content { |
18 | 18 |
19 class BrowserContext; | 19 class BrowserContext; |
20 class ResourceContext; | 20 class ResourceContext; |
| 21 class WebContents; |
21 | 22 |
22 // Maps hostnames to custom zoom levels. Written on the UI thread and read on | 23 // Maps hostnames to custom zoom levels. Written on the UI thread and read on |
23 // any thread. One instance per browser context. Must be created on the UI | 24 // any thread. One instance per browser context. Must be created on the UI |
24 // thread, and it'll delete itself on the UI thread as well. | 25 // thread, and it'll delete itself on the UI thread as well. |
25 // Zoom can be defined at three levels: default zoom, zoom for host, and zoom | 26 // Zoom can be defined at three levels: default zoom, zoom for host, and zoom |
26 // for host with specific scheme. Setting any of the levels leaves settings | 27 // for host with specific scheme. Setting any of the levels leaves settings |
27 // for other settings intact. Getting the zoom level starts at the most | 28 // for other settings intact. Getting the zoom level starts at the most |
28 // specific setting and progresses to the less specific: first the zoom for the | 29 // specific setting and progresses to the less specific: first the zoom for the |
29 // host and scheme pair is checked, secondly the zoom for the host only and | 30 // host and scheme pair is checked, secondly the zoom for the host only and |
30 // lastly default zoom. | 31 // lastly default zoom. |
(...skipping 16 matching lines...) Expand all Loading... |
47 std::string host; | 48 std::string host; |
48 std::string scheme; | 49 std::string scheme; |
49 double zoom_level; | 50 double zoom_level; |
50 }; | 51 }; |
51 | 52 |
52 typedef std::vector<ZoomLevelChange> ZoomLevelVector; | 53 typedef std::vector<ZoomLevelChange> ZoomLevelVector; |
53 | 54 |
54 CONTENT_EXPORT static HostZoomMap* GetForBrowserContext( | 55 CONTENT_EXPORT static HostZoomMap* GetForBrowserContext( |
55 BrowserContext* browser_context); | 56 BrowserContext* browser_context); |
56 | 57 |
| 58 // Returns the current zoom level for the specified WebContents. May be |
| 59 // temporary or host-specific. |
| 60 CONTENT_EXPORT static double GetZoomLevel(const WebContents* web_contents); |
| 61 |
| 62 // Sets the current zoom level for the specified WebContents. The level may |
| 63 // be temporary or host-specific depending on the particular WebContents. |
| 64 CONTENT_EXPORT static void SetZoomLevel(const WebContents* web_contents, |
| 65 double level); |
| 66 |
57 // Copy the zoom levels from the given map. Can only be called on the UI | 67 // Copy the zoom levels from the given map. Can only be called on the UI |
58 // thread. | 68 // thread. |
59 virtual void CopyFrom(HostZoomMap* copy) = 0; | 69 virtual void CopyFrom(HostZoomMap* copy) = 0; |
60 | 70 |
61 // Here |host| is the host portion of URL, or (in the absence of a host) | 71 // Here |host| is the host portion of URL, or (in the absence of a host) |
62 // the complete spec of the URL. | 72 // the complete spec of the URL. |
63 // Returns the zoom for the specified |scheme| and |host|. See class | 73 // Returns the zoom for the specified |scheme| and |host|. See class |
64 // description for details. | 74 // description for details. |
65 // | 75 // |
66 // This may be called on any thread. | 76 // This may be called on any thread. |
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103 virtual scoped_ptr<Subscription> AddZoomLevelChangedCallback( | 113 virtual scoped_ptr<Subscription> AddZoomLevelChangedCallback( |
104 const ZoomLevelChangedCallback& callback) = 0; | 114 const ZoomLevelChangedCallback& callback) = 0; |
105 | 115 |
106 protected: | 116 protected: |
107 virtual ~HostZoomMap() {} | 117 virtual ~HostZoomMap() {} |
108 }; | 118 }; |
109 | 119 |
110 } // namespace content | 120 } // namespace content |
111 | 121 |
112 #endif // CONTENT_PUBLIC_BROWSER_HOST_ZOOM_MAP_H_ | 122 #endif // CONTENT_PUBLIC_BROWSER_HOST_ZOOM_MAP_H_ |
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