/* This Source Code Form is subject to the terms of the Mozilla Public
 * License, v. 2.0. If a copy of the MPL was not distributed with this
 * file, You can obtain one at http://mozilla.org/MPL/2.0/. */

#ifndef NSWINDOW_H_
#define NSWINDOW_H_

#include <objc/objc.h>
#include <CoreFoundation/CoreFoundation.h>

#include "mozilla/widget/IOSView.h"
#include "nsIWidget.h"
#include "gfxPoint.h"

#include "nsTArray.h"

#ifdef __OBJC__
@class ChildView;
#else
typedef struct objc_object ChildView;
#endif

namespace mozilla::layers {
class NativeLayerRootCA;
}

namespace mozilla::widget {
class EventDispatcher;
class TextInputHandler;
}  // namespace mozilla::widget

#define NS_WINDOW_IID \
  {0x5e6fd559, 0xb3f9, 0x40c9, {0x92, 0xd1, 0xef, 0x80, 0xb4, 0xf9, 0x69, 0xe9}}

class nsWindow final : public nsIWidget {
 public:
  nsWindow();

  NS_INLINE_DECL_STATIC_IID(NS_WINDOW_IID)

  NS_DECL_ISUPPORTS_INHERITED

  //
  // nsIWidget
  //

  [[nodiscard]] nsresult Create(nsIWidget* aParent, const LayoutDeviceIntRect&,
                                const mozilla::widget::InitData&) override;
  void Destroy() override;
  void Show(bool aState) override;
  void Enable(bool aState) override {}
  bool IsEnabled() const override { return true; }
  bool IsVisible() const override { return mVisible; }
  void SetFocus(Raise, mozilla::dom::CallerType aCallerType) override;
  LayoutDeviceIntPoint WidgetToScreenOffset() override;

  void SetBackgroundColor(const nscolor& aColor) override;
  void* GetNativeData(uint32_t aDataType) override;

  void Move(const DesktopPoint&) override;
  nsSizeMode SizeMode() override { return mSizeMode; }
  void SetSizeMode(nsSizeMode aMode) override;
  void EnteredFullScreen(bool aFullScreen);
  void Resize(const DesktopSize&, bool aRepaint) override;
  void Resize(const DesktopRect&, bool aRepaint) override;
  void DoResize(double aX, double aY, double aWidth, double aHeight,
                bool aRepaint);
  LayoutDeviceIntRect GetScreenBounds() override;
  LayoutDeviceIntRect GetBounds() override { return mBounds; }
  void ReportMoveEvent();
  void ReportSizeEvent();
  void ReportSizeModeEvent(nsSizeMode aMode);

  double BackingScaleFactor();
  void BackingScaleFactorChanged();
  float GetDPI() override {
    // XXX: terrible
    return 326.0f;
  }
  double GetDefaultScaleInternal() override { return BackingScaleFactor(); }
  int32_t RoundsWidgetCoordinatesTo() override;

  nsresult SetTitle(const nsAString& aTitle) override { return NS_OK; }

  void Invalidate(const LayoutDeviceIntRect& aRect) override;

  void PaintWindow();

  bool HasModalDescendents() { return false; }

  // virtual nsresult
  // NotifyIME(const IMENotification& aIMENotification) override;
  void SetInputContext(const InputContext& aContext,
                       const InputContextAction& aAction) override;
  InputContext GetInputContext() override;
  TextEventDispatcherListener* GetNativeTextEventDispatcherListener() override;

  mozilla::widget::TextInputHandler* GetTextInputHandler() const {
    return mTextInputHandler;
  }
  bool IsVirtualKeyboardDisabled() const;

  /*
  virtual bool ExecuteNativeKeyBinding(
                      NativeKeyBindingsType aType,
                      const mozilla::WidgetKeyboardEvent& aEvent,
                      DoCommandCallback aCallback,
                      void* aCallbackData) override;
  */

  mozilla::layers::NativeLayerRoot* GetNativeLayerRoot() override;

  void HandleMainThreadCATransaction();

  // Called when the main thread enters a phase during which visual changes
  // are imminent and any layer updates on the compositor thread would interfere
  // with visual atomicity.
  // "Async" CATransactions are CATransactions which happen on a thread that's
  // not the main thread.
  void SuspendAsyncCATransactions();

  // Called when we know that the current main thread paint will be completed
  // once the main thread goes back to the event loop.
  void MaybeScheduleUnsuspendAsyncCATransactions();

  // Called from the runnable dispatched by
  // MaybeScheduleUnsuspendAsyncCATransactions(). At this point we know that the
  // main thread is done handling the visual change (such as a window resize)
  // and we can start modifying CALayers from the compositor thread again.
  void UnsuspendAsyncCATransactions();

  mozilla::widget::EventDispatcher* GetEventDispatcher() const;

  static already_AddRefed<nsWindow> From(nsPIDOMWindowOuter* aDOMWindow);
  static already_AddRefed<nsWindow> From(nsIWidget* aWidget);

  void SetIOSView(already_AddRefed<mozilla::widget::IOSView> aView) {
    mIOSView = aView;
  }
  mozilla::widget::IOSView* GetIOSView() const { return mIOSView; }

 protected:
  virtual ~nsWindow();
  void BringToFront();
  nsWindow* FindTopLevel();
  bool IsTopLevel();
  nsresult GetCurrentOffset(uint32_t& aOffset, uint32_t& aLength);
  nsresult DeleteRange(int aOffset, int aLen);

  void TearDownView();

  ChildView* mNativeView;
  bool mVisible;
  nsSizeMode mSizeMode;
  nsTArray<nsWindow*> mChildren;
  nsWindow* mParent;

  mozilla::widget::InputContext mInputContext;
  RefPtr<mozilla::widget::TextInputHandler> mTextInputHandler;
  RefPtr<mozilla::widget::IOSView> mIOSView;

  RefPtr<mozilla::layers::NativeLayerRootCA> mNativeLayerRoot;

  RefPtr<mozilla::CancelableRunnable> mUnsuspendAsyncCATransactionsRunnable;
  LayoutDeviceIntRect mBounds;

  void OnSizeChanged(const mozilla::gfx::IntSize& aSize);

  static void DumpWindows();
  static void DumpWindows(const nsTArray<nsWindow*>& wins, int indent = 0);
  static void LogWindow(nsWindow* win, int index, int indent);
};

#endif /* NSWINDOW_H_ */