// Copyright 2014 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_VIEWS_FRAME_BROWSER_NATIVE_WIDGET_MAC_H_
#define CHROME_BROWSER_UI_VIEWS_FRAME_BROWSER_NATIVE_WIDGET_MAC_H_

#include <optional>

#include "base/callback_list.h"
#include "base/memory/raw_ptr.h"
#include "chrome/browser/command_observer.h"
#include "chrome/browser/ui/browser_window/public/browser_window_interface.h"
#include "chrome/browser/ui/views/frame/browser_native_widget.h"
#include "chrome/browser/ui/views/frame/glass_frame_service.h"
#include "third_party/skia/include/core/SkColor.h"
#include "ui/base/mojom/window_show_state.mojom-forward.h"
#include "ui/native_theme/native_theme.h"
#include "ui/views/widget/native_widget_mac.h"

class BrowserWidget;
class BrowserView;
@class BrowserWindowTouchBarController;
@class BrowserWindowTouchBarViewsDelegate;
namespace tabs {
enum class VerticalTabStripCollapseState;
class VerticalTabStripStateController;
}  // namespace tabs

////////////////////////////////////////////////////////////////////////////////
//  BrowserNativeWidgetMac is a NativeWidgetMac subclass that provides
//  the window frame for the Chrome browser window.
//
class BrowserNativeWidgetMac : public views::NativeWidgetMac,
                               public BrowserNativeWidget,
                               public CommandObserver {
 public:
  BrowserNativeWidgetMac(BrowserWidget* browser_widget,
                         BrowserView* browser_view);

  BrowserNativeWidgetMac(const BrowserNativeWidgetMac&) = delete;
  BrowserNativeWidgetMac& operator=(const BrowserNativeWidgetMac&) = delete;

  BrowserWindowTouchBarController* GetTouchBarController() const;

  // Overridden from views::NativeWidgetMac:
  int32_t SheetOffsetY() override;
  void GetWindowFrameTitlebarHeight(bool* override_titlebar_height,
                                    float* titlebar_height) override;
  void OnFocusWindowToolbar() override;
  void OnWindowFullscreenTransitionStart() override;
  void OnWindowFullscreenTransitionComplete() override;
  void OnWindowWillStartLiveResize() override;
  void OnWindowDidEndLiveResize() override;
  void OnWidgetDestroyed(views::Widget* widget) override;

  // Overridden from BrowserNativeWidget:
  views::Widget::InitParams GetWidgetParams(
      views::Widget::InitParams::Ownership ownership) override;
  bool UseCustomFrame() const override;
  bool UsesNativeSystemMenu() const override;
  bool ShouldSaveWindowPlacement() const override;
  void GetWindowPlacement(
      gfx::Rect* bounds,
      ui::mojom::WindowShowState* show_state) const override;
  content::KeyboardEventProcessingResult PreHandleKeyboardEvent(
      const input::NativeWebKeyboardEvent& event) override;
  bool HandleKeyboardEvent(const input::NativeWebKeyboardEvent& event) override;
  bool ShouldRestorePreviousBrowserWidgetState() const override;
  bool ShouldUseInitialVisibleOnAllWorkspaces() const override;
  void AnnounceTextInInProcessWindow(const std::u16string& text) override;
  gfx::Rect GetGlassFrameBounds() const override;

 protected:
  ~BrowserNativeWidgetMac() override;

  // Overridden from views::NativeWidgetMac:
  void ValidateUserInterfaceItem(
      int32_t command,
      remote_cocoa::mojom::ValidateUserInterfaceItemResult* result) override;
  bool WillExecuteCommand(int32_t command,
                          WindowOpenDisposition window_open_disposition,
                          bool is_before_first_responder) override;
  bool ExecuteCommand(int32_t command,
                      WindowOpenDisposition window_open_disposition,
                      bool is_before_first_responder) override;
  void PopulateCreateWindowParams(
      const views::Widget::InitParams& widget_params,
      remote_cocoa::mojom::CreateWindowParams* params) override;
  NativeWidgetMacNSWindow* CreateNSWindow(
      const remote_cocoa::mojom::CreateWindowParams* params) override;
  remote_cocoa::ApplicationHost* GetRemoteCocoaApplicationHost() override;
  void OnWindowInitialized() override;
  void OnWidgetInitDone() override;
  void OnWidgetThemeChanged(views::Widget* widget) override;
  void OnWindowDestroying(gfx::NativeWindow window) override;
  void OnWidgetActivationChanged(views::Widget* widget, bool active) override;

  // Overridden from CommandObserver:
  void EnabledStateChangedForCommand(int id, bool enabled) override;

 private:
  bool IsGlassEligible() const;
  void UpdateGlassEligibility(bool is_glass_eligible);
  void UpdateBackgroundGeometry();
  void UpdateBackgroundColor();
  std::optional<int> GetGlassFrameHeight() const;
  std::optional<int> GetGlassFrameWidth() const;
  void OnVerticalTabStripModeChanged(
      tabs::VerticalTabStripStateController* controller);
  void OnVerticalTabStripCollapseChanged(
      tabs::VerticalTabStripCollapseState state);
  void OnVerticalTabStripResizingChanged(bool is_resizing);

  raw_ptr<BrowserView> browser_view_;  // Weak. Our ClientView.
  BrowserWindowTouchBarViewsDelegate* __strong touch_bar_delegate_;
  NSView* __strong background_view_;
  NSView* __strong tint_view_;

  std::optional<SkColor> last_theme_color_;
  std::optional<bool> last_is_vertical_tabs_;
  std::optional<bool> last_is_glass_eligible_;
  bool is_window_live_resizing_ = false;
  base::CallbackListSubscription vertical_tab_subscription_;
  base::CallbackListSubscription vertical_tab_collapse_subscription_;
  base::CallbackListSubscription vertical_tab_resizing_subscription_;
  base::CallbackListSubscription glass_frame_service_subscription_;
  base::CallbackListSubscription paint_as_active_subscription_;
};

#endif  // CHROME_BROWSER_UI_VIEWS_FRAME_BROWSER_NATIVE_WIDGET_MAC_H_