ash/webui/help_app_ui/help_app_untrusted_ui.h

// Copyright 2020 The Chromium Authors
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.

#ifndef ASH_WEBUI_HELP_APP_UI_HELP_APP_UNTRUSTED_UI_H_
#define ASH_WEBUI_HELP_APP_UI_HELP_APP_UNTRUSTED_UI_H_

#include "base/functional/callback.h"
#include "ui/webui/resources/cr_components/color_change_listener/color_change_listener.mojom.h"
#include "ui/webui/untrusted_web_ui_controller.h"

namespace ui {
class ColorChangeHandler;
}

namespace content {
class WebUIDataSource;
}  // namespace content

namespace ash {

// The Web UI for chrome-untrusted://help-app.
class HelpAppUntrustedUI : public ui::UntrustedWebUIController {
 public:
  explicit HelpAppUntrustedUI(
      content::WebUI* web_ui,
      base::RepeatingCallback<void(content::WebUIDataSource*)>
          populate_load_time_data_callback);
  HelpAppUntrustedUI(const HelpAppUntrustedUI&) = delete;
  HelpAppUntrustedUI& operator=(const HelpAppUntrustedUI&) = delete;
  ~HelpAppUntrustedUI() override;

  // Binds a PageHandler to HelpAppUntrustedUI. This handler grabs a reference
  // to the page and pushes a colorChangeEvent to the untrusted JS running there
  // when the OS color scheme has changed.
  void BindInterface(
      mojo::PendingReceiver<color_change_listener::mojom::PageHandler>
          receiver);

 private:
  WEB_UI_CONTROLLER_TYPE_DECL();

  std::unique_ptr<ui::ColorChangeHandler> color_provider_handler_;
};

}  // namespace ash

#endif  // ASH_WEBUI_HELP_APP_UI_HELP_APP_UNTRUSTED_UI_H_