/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */

/* vim: set ts=8 sts=2 et sw=2 tw=80: */

/* 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 nsScreen_h___

#define nsScreen_h___

#include "mozilla/Attributes.h"

#include "mozilla/dom/ScreenBinding.h"

#include "mozilla/dom/ScreenLuminance.h"

#include "mozilla/dom/ScreenOrientation.h"

#include "mozilla/DOMEventTargetHelper.h"

#include "mozilla/ErrorResult.h"

#include "mozilla/StaticPrefs.h"

#include "nsCOMPtr.h"

#include "nsRect.h"

class nsDeviceContext;

// Script "screen" object

class nsScreen : public mozilla::DOMEventTargetHelper

{

  typedef mozilla::ErrorResult ErrorResult;

public:

  static already_AddRefed<nsScreen> Create(nsPIDOMWindowInner* aWindow);

  NS_DECL_ISUPPORTS_INHERITED

  NS_DECL_CYCLE_COLLECTION_CLASS_INHERITED(nsScreen, mozilla::DOMEventTargetHelper)

  nsPIDOMWindowInner* GetParentObject() const

  {

    return GetOwner();

  }

  nsPIDOMWindowOuter* GetOuter() const;

  int32_t GetTop(ErrorResult& aRv)

  {

    nsRect rect;

    aRv = GetRect(rect);

    return rect.y;

  }

  int32_t GetLeft(ErrorResult& aRv)

  {

    nsRect rect;

    aRv = GetRect(rect);

    return rect.x;

  }

  int32_t GetWidth(ErrorResult& aRv)

  {

    nsRect rect;

    if (IsDeviceSizePageSize()) {

      if (nsCOMPtr<nsPIDOMWindowInner> owner = GetOwner()) {

        int32_t innerWidth = 0;

        aRv = owner->GetInnerWidth(&innerWidth);

        return innerWidth;

      }

    }

    aRv = GetRect(rect);

    return rect.Width();

  }

  int32_t GetHeight(ErrorResult& aRv)

  {

    nsRect rect;

    if (IsDeviceSizePageSize()) {

      if (nsCOMPtr<nsPIDOMWindowInner> owner = GetOwner()) {

        int32_t innerHeight = 0;

        aRv = owner->GetInnerHeight(&innerHeight);

        return innerHeight;

      }

    }

    aRv = GetRect(rect);

    return rect.Height();

  }

  int32_t GetPixelDepth(ErrorResult& aRv);

  int32_t GetColorDepth(ErrorResult& aRv)

  {

    return GetPixelDepth(aRv);

  }

  int32_t GetAvailTop(ErrorResult& aRv)

  {

    nsRect rect;

    aRv = GetAvailRect(rect);

    return rect.y;

  }

  int32_t GetAvailLeft(ErrorResult& aRv)

  {

    nsRect rect;

    aRv = GetAvailRect(rect);

    return rect.x;

  }

  int32_t GetAvailWidth(ErrorResult& aRv)

  {

    nsRect rect;

    aRv = GetAvailRect(rect);

    return rect.Width();

  }

  int32_t GetAvailHeight(ErrorResult& aRv)

  {

    nsRect rect;

    aRv = GetAvailRect(rect);

    return rect.Height();

  }

  // Media Capabilities extension

  mozilla::dom::ScreenColorGamut ColorGamut() const

  {

    return mozilla::dom::ScreenColorGamut::Srgb;

  }

  already_AddRefed<mozilla::dom::ScreenLuminance> GetLuminance() const

  {

    return nullptr;

  }

  static bool MediaCapabilitiesEnabled(JSContext* aCx, JSObject* aGlobal)

  {

    return mozilla::StaticPrefs::MediaCapabilitiesScreenEnabled();

  }

  IMPL_EVENT_HANDLER(change);

  // Deprecated

  void GetMozOrientation(nsString& aOrientation,

                         mozilla::dom::CallerType aCallerType) const;

  IMPL_EVENT_HANDLER(mozorientationchange)

  bool MozLockOrientation(const nsAString& aOrientation, ErrorResult& aRv);

  bool MozLockOrientation(const mozilla::dom::Sequence<nsString>& aOrientations, ErrorResult& aRv);

  void MozUnlockOrientation();

  virtual JSObject* WrapObject(JSContext* aCx, JS::Handle<JSObject*> aGivenProto) override;

  mozilla::dom::ScreenOrientation* Orientation() const;

protected:

  nsDeviceContext* GetDeviceContext();

  nsresult GetRect(nsRect& aRect);

  nsresult GetAvailRect(nsRect& aRect);

  nsresult GetWindowInnerRect(nsRect& aRect);

private:

  explicit nsScreen(nsPIDOMWindowInner* aWindow);

  virtual ~nsScreen();

  bool IsDeviceSizePageSize();

  bool ShouldResistFingerprinting() const;

  RefPtr<mozilla::dom::ScreenOrientation> mScreenOrientation;

};

#endif /* nsScreen_h___ */