a0f44d9203861af2938aa816dd3f43ccf0cb3df3
[platform/framework/web/crosswalk.git] / src / chrome / browser / ui / navigation_correction_tab_observer.h
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
3 // found in the LICENSE file.
4
5 #ifndef CHROME_BROWSER_UI_NAVIGATION_CORRECTION_TAB_OBSERVER_H_
6 #define CHROME_BROWSER_UI_NAVIGATION_CORRECTION_TAB_OBSERVER_H_
7
8 #include "base/prefs/pref_change_registrar.h"
9 #include "components/google/core/browser/google_url_tracker.h"
10 #include "content/public/browser/web_contents_observer.h"
11 #include "content/public/browser/web_contents_user_data.h"
12
13 class Profile;
14
15 namespace user_prefs {
16 class PrefRegistrySyncable;
17 }
18
19 // Per-tab class to implement navigation suggestion service functionality.
20 class NavigationCorrectionTabObserver
21     : public content::WebContentsObserver,
22       public content::WebContentsUserData<NavigationCorrectionTabObserver> {
23  public:
24   virtual ~NavigationCorrectionTabObserver();
25
26   static void RegisterProfilePrefs(user_prefs::PrefRegistrySyncable* registry);
27
28  private:
29   explicit NavigationCorrectionTabObserver(content::WebContents* web_contents);
30   friend class content::WebContentsUserData<NavigationCorrectionTabObserver>;
31
32   // content::WebContentsObserver overrides:
33   virtual void RenderViewCreated(
34       content::RenderViewHost* render_view_host) OVERRIDE;
35
36   // Internal helpers ----------------------------------------------------------
37
38   // Callback that is called when the Google URL is updated.
39   void OnGoogleURLUpdated();
40
41   // Returns the URL for the correction service.  If the returned URL
42   // is empty, the default error pages will be used.
43   GURL GetNavigationCorrectionURL() const;
44
45   // Called when navigation corrections are enabled or disabled.
46   void OnEnabledChanged();
47
48   // Updates the renderer's navigation correction service configuration.
49   void UpdateNavigationCorrectionInfo(content::RenderViewHost* rvh);
50
51   Profile* profile_;
52   PrefChangeRegistrar pref_change_registrar_;
53   scoped_ptr<GoogleURLTracker::Subscription> google_url_updated_subscription_;
54
55   DISALLOW_COPY_AND_ASSIGN(NavigationCorrectionTabObserver);
56 };
57
58 #endif  // CHROME_BROWSER_UI_NAVIGATION_CORRECTION_TAB_OBSERVER_H_