ash/system/unified/power_button.h

// Copyright 2022 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_SYSTEM_UNIFIED_POWER_BUTTON_H_
#define ASH_SYSTEM_UNIFIED_POWER_BUTTON_H_

#include <memory>

#include "ash/ash_export.h"
#include "base/memory/raw_ptr.h"
#include "ui/base/metadata/metadata_header_macros.h"
#include "ui/views/controls/button/button.h"
#include "ui/views/view.h"

namespace ui {
class Event;
}  // namespace ui

namespace views {
class ImageView;
class MenuItemView;
}  // namespace views

namespace ash {

class UnifiedSystemTrayController;

// The power button container which contains 2 icons: a power icon and an
// arrow down icon.
class PowerButtonContainer : public views::Button {
  METADATA_HEADER(PowerButtonContainer, views::Button)

 public:
  explicit PowerButtonContainer(PressedCallback callback);
  PowerButtonContainer(const PowerButtonContainer&) = delete;
  PowerButtonContainer& operator=(const PowerButtonContainer&) = delete;
  ~PowerButtonContainer() override;

  void UpdateIconColor(bool is_active);

 private:
  // Owned by views hierarchy.
  raw_ptr<views::ImageView> power_icon_ = nullptr;
  raw_ptr<views::ImageView> arrow_icon_ = nullptr;
};

// The power button that lives in the `QuickSettingsView` footer. The
// `background_view_` will change its corner radii and a power button
// menu will pop up at the same time when it's active.
class ASH_EXPORT PowerButton : public views::View {
  METADATA_HEADER(PowerButton, views::View)

 public:
  explicit PowerButton(UnifiedSystemTrayController* tray_controller);
  PowerButton(const PowerButton&) = delete;
  PowerButton& operator=(const PowerButton&) = delete;
  ~PowerButton() override;

  // If the context mune is currently open.
  bool IsMenuShowing();

  // Getter of the `MenuItemView` for testing.
  views::MenuItemView* GetMenuViewForTesting();

  PowerButtonContainer* button_content_for_testing() { return button_content_; }

 private:
  friend class PowerButtonPixelTest;
  friend class PowerButtonTest;
  friend class QuickSettingsFooterTest;

  // This class is the context menu controller used by `PowerButton` in the
  // `QuickSettingsFooter`, responsible for building, running the menu and
  // executing the commands.
  class MenuController;

  // views::View:
  void OnThemeChanged() override;

  // Updates the shape (rounded corner radii) and color of this view. Also
  // re-paints the focus ring.
  void UpdateView();

  // Updates the rounded corner radii based on the current `PowerButton` state.
  void UpdateRoundedCorners();

  // Shows the context menu by `MenuController`. This method passed in to the
  // `Button` view as the `OnPressedCallback`.
  void OnButtonActivated(const ui::Event& event);

  // Owned by views hierarchy.
  raw_ptr<views::View> background_view_ = nullptr;
  raw_ptr<PowerButtonContainer> button_content_ = nullptr;

  // The context menu, which will be set as the controller to show the power
  // button menu view.
  std::unique_ptr<MenuController> context_menu_;

  // Owned by UnifiedSystemTrayBubble.
  const raw_ptr<UnifiedSystemTrayController, DanglingUntriaged>
      tray_controller_;
};

}  // namespace ash

#endif  // ASH_SYSTEM_UNIFIED_POWER_BUTTON_H_