| // Copyright (c) 2012 The Chromium Authors. All rights reserved. |
| // Use of this source code is governed by a BSD-style license that can be |
| // found in the LICENSE file. |
| |
| #ifndef CHROME_BROWSER_UI_ALTERNATE_ERROR_TAB_OBSERVER_H_ |
| #define CHROME_BROWSER_UI_ALTERNATE_ERROR_TAB_OBSERVER_H_ |
| |
| #include "base/prefs/pref_change_registrar.h" |
| #include "content/public/browser/notification_observer.h" |
| #include "content/public/browser/notification_registrar.h" |
| #include "content/public/browser/web_contents_observer.h" |
| #include "content/public/browser/web_contents_user_data.h" |
| |
| class Profile; |
| |
| namespace user_prefs { |
| class PrefRegistrySyncable; |
| } |
| |
| // Per-tab class to implement alternate error page functionality. |
| class AlternateErrorPageTabObserver |
| : public content::WebContentsObserver, |
| public content::NotificationObserver, |
| public content::WebContentsUserData<AlternateErrorPageTabObserver> { |
| public: |
| virtual ~AlternateErrorPageTabObserver(); |
| |
| static void RegisterProfilePrefs(user_prefs::PrefRegistrySyncable* registry); |
| |
| private: |
| explicit AlternateErrorPageTabObserver(content::WebContents* web_contents); |
| friend class content::WebContentsUserData<AlternateErrorPageTabObserver>; |
| |
| // content::WebContentsObserver overrides: |
| virtual void RenderViewCreated( |
| content::RenderViewHost* render_view_host) OVERRIDE; |
| |
| // content::NotificationObserver overrides: |
| virtual void Observe(int type, |
| const content::NotificationSource& source, |
| const content::NotificationDetails& details) OVERRIDE; |
| |
| // Internal helpers ---------------------------------------------------------- |
| |
| // Returns the server that can provide alternate error pages. If the returned |
| // URL is empty, the default error page built into WebKit will be used. |
| GURL GetAlternateErrorPageURL() const; |
| |
| void OnAlternateErrorPagesEnabledChanged(); |
| |
| // Send the alternate error page URL to the renderer. |
| void UpdateAlternateErrorPageURL(content::RenderViewHost* rvh); |
| |
| Profile* profile_; |
| content::NotificationRegistrar registrar_; |
| PrefChangeRegistrar pref_change_registrar_; |
| |
| DISALLOW_COPY_AND_ASSIGN(AlternateErrorPageTabObserver); |
| }; |
| |
| #endif // CHROME_BROWSER_UI_ALTERNATE_ERROR_TAB_OBSERVER_H_ |