| // Copyright 2013 The Chromium Authors |
| // 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/scoped_observation.h" |
| #include "chrome/browser/themes/theme_service_observer.h" |
| #include "content/public/browser/web_ui_message_handler.h" |
| #include "ui/native_theme/native_theme.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 ThemeServiceObserver, |
| public ui::NativeThemeObserver { |
| public: |
| ThemeHandler(); |
| |
| ThemeHandler(const ThemeHandler&) = delete; |
| ThemeHandler& operator=(const ThemeHandler&) = delete; |
| |
| ~ThemeHandler() override; |
| |
| private: |
| // content::WebUIMessageHandler: |
| void RegisterMessages() override; |
| void OnJavascriptAllowed() override; |
| void OnJavascriptDisallowed() override; |
| |
| // Re/set the CSS caches. |
| void InitializeCSSCaches(); |
| |
| // ThemeServiceObserver implementation. |
| void OnThemeChanged() override; |
| |
| // ui::NativeThemeObserver: |
| void OnNativeThemeUpdated(ui::NativeTheme* observed_theme) override; |
| |
| // Handler for "observeThemeChanges" chrome.send() message. No arguments. |
| void HandleObserveThemeChanges(const base::Value::List& args); |
| |
| // Notify the page (if allowed) that the theme has changed. |
| void SendThemeChanged(); |
| |
| Profile* GetProfile(); |
| |
| base::ScopedObservation<ui::NativeTheme, ui::NativeThemeObserver> |
| theme_observation_{this}; |
| }; |
| |
| #endif // CHROME_BROWSER_UI_WEBUI_THEME_HANDLER_H_ |