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   ~NavigationCorrectionTabObserver() override;
  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   void RenderViewCreated(content::RenderViewHost* render_view_host) override;
  34
  35   // Internal helpers ----------------------------------------------------------
  36
  37   // Callback that is called when the Google URL is updated.
  38   void OnGoogleURLUpdated();
  39
  40   // Returns the URL for the correction service.  If the returned URL
  41   // is empty, the default error pages will be used.
  42   GURL GetNavigationCorrectionURL() const;
  43
  44   // Called when navigation corrections are enabled or disabled.
  45   void OnEnabledChanged();
  46
  47   // Updates the renderer's navigation correction service configuration.
  48   void UpdateNavigationCorrectionInfo(content::RenderViewHost* rvh);
  49
  50   Profile* profile_;
  51   PrefChangeRegistrar pref_change_registrar_;
  52   scoped_ptr<GoogleURLTracker::Subscription> google_url_updated_subscription_;
  53
  54   DISALLOW_COPY_AND_ASSIGN(NavigationCorrectionTabObserver);
  55 };
  56
  57 #endif  // CHROME_BROWSER_UI_NAVIGATION_CORRECTION_TAB_OBSERVER_H_