| // Copyright (c) 2013 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_WEBUI_THEME_HANDLER_H_ |
| #define CHROME_BROWSER_UI_WEBUI_THEME_HANDLER_H_ |
| |
| #include "base/macros.h" |
| #include "base/scoped_observer.h" |
| #include "content/public/browser/notification_observer.h" |
| #include "content/public/browser/notification_registrar.h" |
| #include "content/public/browser/web_ui_message_handler.h" |
| #include "ui/native_theme/native_theme_observer.h" |
| |
| class Profile; |
| |
| namespace ui { |
| class NativeTheme; |
| } |
| |
| // A class to keep the ThemeSource up to date when theme changes. |
| class ThemeHandler : public content::WebUIMessageHandler, |
| public content::NotificationObserver, |
| public ui::NativeThemeObserver { |
| public: |
| ThemeHandler(); |
| ~ThemeHandler() override; |
| |
| private: |
| // content::WebUIMessageHandler: |
| void RegisterMessages() override; |
| void OnJavascriptAllowed() override; |
| void OnJavascriptDisallowed() override; |
| |
| // Re/set the CSS caches. |
| void InitializeCSSCaches(); |
| |
| // content::NotificationObserver implementation. |
| void Observe(int type, |
| const content::NotificationSource& source, |
| const content::NotificationDetails& details) override; |
| |
| // ui::NativeThemeObserver: |
| void OnNativeThemeUpdated(ui::NativeTheme* observed_theme) override; |
| |
| // Handler for "observeThemeChanges" chrome.send() message. No arguments. |
| void HandleObserveThemeChanges(const base::ListValue* args); |
| |
| // Notify the page (if allowed) that the theme has changed. |
| void SendThemeChanged(); |
| |
| Profile* GetProfile() const; |
| |
| content::NotificationRegistrar registrar_; |
| |
| ScopedObserver<ui::NativeTheme, ThemeHandler> theme_observer_; |
| |
| DISALLOW_COPY_AND_ASSIGN(ThemeHandler); |
| }; |
| |
| #endif // CHROME_BROWSER_UI_WEBUI_THEME_HANDLER_H_ |