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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/prefs/public/pref_member.h" | 10 #include "base/prefs/public/pref_member.h" |
11 #include "content/public/browser/notification_observer.h" | |
12 #include "content/public/browser/notification_registrar.h" | |
13 #include "content/public/browser/web_contents_observer.h" | 11 #include "content/public/browser/web_contents_observer.h" |
14 #include "content/public/browser/web_contents_user_data.h" | 12 #include "content/public/browser/web_contents_user_data.h" |
15 | 13 |
16 class ZoomObserver; | 14 class ZoomObserver; |
17 | 15 |
18 namespace content { | 16 namespace content { |
19 class WebContents; | 17 class WebContents; |
20 } | 18 } |
21 | 19 |
22 // Per-tab class to manage the Omnibox zoom icon. | 20 // Per-tab class to manage the Omnibox zoom icon. |
23 class ZoomController : public content::NotificationObserver, | 21 class ZoomController : public content::WebContentsObserver, |
24 public content::WebContentsObserver, | |
25 public content::WebContentsUserData<ZoomController> { | 22 public content::WebContentsUserData<ZoomController> { |
26 public: | 23 public: |
27 virtual ~ZoomController(); | 24 virtual ~ZoomController(); |
28 | 25 |
29 int zoom_percent() const { return zoom_percent_; } | 26 int zoom_percent() const { return zoom_percent_; } |
30 | 27 |
31 // Convenience method to quickly check if the tab's at default zoom. | 28 // Convenience method to quickly check if the tab's at default zoom. |
32 bool IsAtDefaultZoom() const; | 29 bool IsAtDefaultZoom() const; |
33 | 30 |
34 // Returns which image should be loaded for the current zoom level. | 31 // Returns which image should be loaded for the current zoom level. |
35 int GetResourceForZoomLevel() const; | 32 int GetResourceForZoomLevel() const; |
36 | 33 |
37 void set_observer(ZoomObserver* observer) { observer_ = observer; } | 34 void set_observer(ZoomObserver* observer) { observer_ = observer; } |
38 | 35 |
36 void OnZoomLevelChanged(const std::string& host); | |
jam
2013/01/30 17:50:44
nit: make this private if it doesn't need to be pu
| |
37 | |
39 // content::WebContentsObserver overrides: | 38 // content::WebContentsObserver overrides: |
40 virtual void DidNavigateMainFrame( | 39 virtual void DidNavigateMainFrame( |
41 const content::LoadCommittedDetails& details, | 40 const content::LoadCommittedDetails& details, |
42 const content::FrameNavigateParams& params) OVERRIDE; | 41 const content::FrameNavigateParams& params) OVERRIDE; |
43 | 42 |
44 // content::NotificationObserver overrides: | |
45 virtual void Observe(int type, | |
46 const content::NotificationSource& source, | |
47 const content::NotificationDetails& details) OVERRIDE; | |
48 | |
49 private: | 43 private: |
50 explicit ZoomController(content::WebContents* web_contents); | 44 explicit ZoomController(content::WebContents* web_contents); |
51 friend class content::WebContentsUserData<ZoomController>; | 45 friend class content::WebContentsUserData<ZoomController>; |
52 friend class ZoomControllerTest; | 46 friend class ZoomControllerTest; |
53 | 47 |
54 // Updates the zoom icon and zoom percentage based on current values and | 48 // Updates the zoom icon and zoom percentage based on current values and |
55 // notifies the observer if changes have occurred. |host| may be empty, | 49 // notifies the observer if changes have occurred. |host| may be empty, |
56 // meaning the change should apply to ~all sites. If it is not empty, the | 50 // meaning the change should apply to ~all sites. If it is not empty, the |
57 // change only affects sites with the given host. | 51 // change only affects sites with the given host. |
58 void UpdateState(const std::string& host); | 52 void UpdateState(const std::string& host); |
59 | 53 |
60 // The current zoom percentage. | 54 // The current zoom percentage. |
61 int zoom_percent_; | 55 int zoom_percent_; |
62 | 56 |
63 content::NotificationRegistrar registrar_; | |
64 | |
65 // Used to access the default zoom level preference. | 57 // Used to access the default zoom level preference. |
66 DoublePrefMember default_zoom_level_; | 58 DoublePrefMember default_zoom_level_; |
67 | 59 |
68 // Observer receiving notifications on state changes. | 60 // Observer receiving notifications on state changes. |
69 ZoomObserver* observer_; | 61 ZoomObserver* observer_; |
70 | 62 |
71 DISALLOW_COPY_AND_ASSIGN(ZoomController); | 63 DISALLOW_COPY_AND_ASSIGN(ZoomController); |
72 }; | 64 }; |
73 | 65 |
74 #endif // CHROME_BROWSER_UI_ZOOM_ZOOM_CONTROLLER_H_ | 66 #endif // CHROME_BROWSER_UI_ZOOM_ZOOM_CONTROLLER_H_ |
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