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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 CHROME_BROWSER_UI_ZOOM_ZOOM_CONTROLLER_H_ | 5 #ifndef CHROME_BROWSER_UI_ZOOM_ZOOM_CONTROLLER_H_ |
6 #define CHROME_BROWSER_UI_ZOOM_ZOOM_CONTROLLER_H_ | 6 #define CHROME_BROWSER_UI_ZOOM_ZOOM_CONTROLLER_H_ |
7 | 7 |
8 #include "base/basictypes.h" | 8 #include "base/basictypes.h" |
9 #include "base/compiler_specific.h" | 9 #include "base/compiler_specific.h" |
10 #include "base/observer_list.h" | |
10 #include "base/prefs/pref_member.h" | 11 #include "base/prefs/pref_member.h" |
11 #include "content/public/browser/host_zoom_map.h" | 12 #include "content/public/browser/host_zoom_map.h" |
12 #include "content/public/browser/web_contents_observer.h" | 13 #include "content/public/browser/web_contents_observer.h" |
13 #include "content/public/browser/web_contents_user_data.h" | 14 #include "content/public/browser/web_contents_user_data.h" |
14 | 15 |
15 class ZoomObserver; | 16 class ZoomObserver; |
16 | 17 |
17 namespace content { | 18 namespace content { |
18 class WebContents; | 19 class WebContents; |
19 } | 20 } |
20 | 21 |
21 // Per-tab class to manage the Omnibox zoom icon. | 22 namespace extensions { |
23 class Extension; | |
24 } // namespace extensions | |
25 | |
26 // Per-tab class to manage zoom changes and the Omnibox zoom icon. | |
22 class ZoomController : public content::WebContentsObserver, | 27 class ZoomController : public content::WebContentsObserver, |
23 public content::WebContentsUserData<ZoomController> { | 28 public content::WebContentsUserData<ZoomController> { |
24 public: | 29 public: |
30 // Defines how zoom changes are handled. | |
31 enum ZoomMode { | |
32 // Results in default zoom behavior, i.e. zoom changes are handled | |
33 // automatically and on a per-origin basis, meaning that other tabs | |
34 // navigated to the same origin will also zoom. | |
35 ZOOM_MODE_DEFAULT, | |
36 // Results in zoom changes being handled automatically, but on a per-tab | |
37 // basis. Tabs in this zoom mode will not be affected by zoom changes in | |
38 // other tabs, and vice versa. | |
39 ZOOM_MODE_ISOLATED, | |
40 // Overrides the automatic handling of zoom changes. The |onZoomChange| | |
41 // event will still be dispatched, but the page will not actually be zoomed. | |
42 // These zoom changes can be handled manually by listening for the | |
43 // |onZoomChange| event. Zooming in this mode is also on a per-tab basis. | |
44 ZOOM_MODE_MANUAL, | |
45 // Disables all zooming in this tab. The tab will revert to default (100%) | |
46 // zoom, and all attempted zoom changes will be ignored. | |
47 ZOOM_MODE_DISABLED, | |
48 }; | |
49 | |
25 virtual ~ZoomController(); | 50 virtual ~ZoomController(); |
26 | 51 |
27 int zoom_percent() const { return zoom_percent_; } | 52 ZoomMode zoom_mode() const { return zoom_mode_; } |
28 | 53 |
29 // Convenience method to quickly check if the tab's at default zoom. | 54 // Convenience method to quickly check if the tab's at default zoom. |
30 bool IsAtDefaultZoom() const; | 55 bool IsAtDefaultZoom() const; |
31 | 56 |
32 // Returns which image should be loaded for the current zoom level. | 57 // Returns which image should be loaded for the current zoom level. |
33 int GetResourceForZoomLevel() const; | 58 int GetResourceForZoomLevel() const; |
34 | 59 |
35 void set_observer(ZoomObserver* observer) { observer_ = observer; } | 60 const extensions::Extension* last_extension() const { |
61 return last_extension_.get(); | |
62 } | |
63 | |
64 void AddObserver(ZoomObserver* observer); | |
65 void RemoveObserver(ZoomObserver* observer); | |
66 | |
67 double GetZoomLevel() const; | |
68 int GetZoomPercent() const; | |
Dan Beam
2014/06/26 22:16:38
nit: doc comment? usually if something is StudlyC
wjmaclean
2014/07/02 22:24:59
Done.
| |
69 | |
70 // Sets the zoom level through HostZoomMap. | |
71 // Returns true on success. | |
72 bool SetZoomLevel(double zoom_level); | |
73 | |
74 // Sets the zoom level through WebContents::SetZoomLevel(), and attributes the | |
75 // zoom to |extension|. Returns a boolean flag indicating success (true) or | |
76 // failure (false). | |
77 bool SetZoomLevelByExtension( | |
78 double zoom_level, | |
79 const scoped_refptr<const extensions::Extension>& extension); | |
80 | |
81 // Sets the zoom mode, which defines zoom behavior (see enum ZoomMode). | |
82 void SetZoomMode(ZoomMode zoom_mode); | |
36 | 83 |
37 // content::WebContentsObserver overrides: | 84 // content::WebContentsObserver overrides: |
38 virtual void DidNavigateMainFrame( | 85 virtual void DidNavigateMainFrame( |
39 const content::LoadCommittedDetails& details, | 86 const content::LoadCommittedDetails& details, |
40 const content::FrameNavigateParams& params) OVERRIDE; | 87 const content::FrameNavigateParams& params) OVERRIDE; |
41 | 88 |
42 private: | 89 private: |
43 explicit ZoomController(content::WebContents* web_contents); | 90 explicit ZoomController(content::WebContents* web_contents); |
44 friend class content::WebContentsUserData<ZoomController>; | 91 friend class content::WebContentsUserData<ZoomController>; |
45 friend class ZoomControllerTest; | 92 friend class ZoomControllerTest; |
46 | 93 |
47 void OnZoomLevelChanged(const content::HostZoomMap::ZoomLevelChange& change); | 94 void OnZoomLevelChanged(const content::HostZoomMap::ZoomLevelChange& change); |
48 | 95 |
49 // Updates the zoom icon and zoom percentage based on current values and | 96 // Updates the zoom icon and zoom percentage based on current values and |
50 // notifies the observer if changes have occurred. |host| may be empty, | 97 // notifies the observer if changes have occurred. |host| may be empty, |
51 // meaning the change should apply to ~all sites. If it is not empty, the | 98 // meaning the change should apply to ~all sites. If it is not empty, the |
52 // change only affects sites with the given host. | 99 // change only affects sites with the given host. |
53 void UpdateState(const std::string& host); | 100 void UpdateState(const std::string& host); |
101 // Same as UpdateState, but takes into account whether a temporary zoom level | |
102 // has been set on |host| when deciding whether to show the zoom notification | |
103 // bubble. | |
104 void UpdateStateIncludingTemporary(const std::string& host, | |
105 bool is_temporary_zoom); | |
54 | 106 |
55 // The current zoom percentage. | 107 // The current zoom mode. |
56 int zoom_percent_; | 108 ZoomMode zoom_mode_; |
109 | |
110 // Current zoom level. | |
111 double zoom_level_; | |
57 | 112 |
58 // Used to access the default zoom level preference. | 113 // Used to access the default zoom level preference. |
59 DoublePrefMember default_zoom_level_; | 114 DoublePrefMember default_zoom_level_; |
60 | 115 |
116 // Keeps track of the extension (if any) that initiated the last zoom change | |
117 // that took effect. | |
118 scoped_refptr<const extensions::Extension> last_extension_; | |
119 | |
61 // Observer receiving notifications on state changes. | 120 // Observer receiving notifications on state changes. |
62 ZoomObserver* observer_; | 121 ObserverList<ZoomObserver> observers_; |
63 | 122 |
64 content::BrowserContext* browser_context_; | 123 content::BrowserContext* browser_context_; |
65 | 124 |
66 scoped_ptr<content::HostZoomMap::Subscription> zoom_subscription_; | 125 scoped_ptr<content::HostZoomMap::Subscription> zoom_subscription_; |
67 | 126 |
68 DISALLOW_COPY_AND_ASSIGN(ZoomController); | 127 DISALLOW_COPY_AND_ASSIGN(ZoomController); |
69 }; | 128 }; |
70 | 129 |
71 #endif // CHROME_BROWSER_UI_ZOOM_ZOOM_CONTROLLER_H_ | 130 #endif // CHROME_BROWSER_UI_ZOOM_ZOOM_CONTROLLER_H_ |
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