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// 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_
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