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(GURL old_url, GURL new_url); 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_ 59
