1 files changed, 191 insertions, 0 deletions
diff --git a/widget/Screen.cpp b/widget/Screen.cpp
new file mode 100644
index 0000000000..71a1624624
--- /dev/null
+++ b/widget/Screen.cpp
@@ -0,0 +1,191 @@
+/* -*- Mode: C++; c-basic-offset: 2; indent-tabs-mode: nil; tab-width: 2; -*- */
+/* vim: set sw=2 ts=8 et 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/. */
+
+#include "Screen.h"
+
+#include "mozilla/dom/DOMTypes.h"
+#include "mozilla/dom/ScreenBinding.h"
+#include "mozilla/Hal.h"
+#include "mozilla/LookAndFeel.h"
+#include "mozilla/StaticPrefs_layout.h"
+
+namespace mozilla::widget {
+
+NS_IMPL_ISUPPORTS(Screen, nsIScreen)
+
+static hal::ScreenOrientation EffectiveOrientation(
+    hal::ScreenOrientation aOrientation, const LayoutDeviceIntRect& aRect) {
+  if (aOrientation == hal::ScreenOrientation::None) {
+    return aRect.Width() >= aRect.Height()
+               ? hal::ScreenOrientation::LandscapePrimary
+               : hal::ScreenOrientation::PortraitPrimary;
+  }
+  return aOrientation;
+}
+
+Screen::Screen(LayoutDeviceIntRect aRect, LayoutDeviceIntRect aAvailRect,
+               uint32_t aPixelDepth, uint32_t aColorDepth,
+               uint32_t aRefreshRate, DesktopToLayoutDeviceScale aContentsScale,
+               CSSToLayoutDeviceScale aDefaultCssScale, float aDPI,
+               IsPseudoDisplay aIsPseudoDisplay,
+               hal::ScreenOrientation aOrientation,
+               OrientationAngle aOrientationAngle)
+    : mRect(aRect),
+      mAvailRect(aAvailRect),
+      mRectDisplayPix(RoundedToInt(aRect / aContentsScale)),
+      mAvailRectDisplayPix(RoundedToInt(aAvailRect / aContentsScale)),
+      mPixelDepth(aPixelDepth),
+      mColorDepth(aColorDepth),
+      mRefreshRate(aRefreshRate),
+      mContentsScale(aContentsScale),
+      mDefaultCssScale(aDefaultCssScale),
+      mDPI(aDPI),
+      mScreenOrientation(EffectiveOrientation(aOrientation, aRect)),
+      mOrientationAngle(aOrientationAngle),
+      mIsPseudoDisplay(aIsPseudoDisplay == IsPseudoDisplay::Yes) {}
+
+Screen::Screen(const dom::ScreenDetails& aScreen)
+    : mRect(aScreen.rect()),
+      mAvailRect(aScreen.availRect()),
+      mRectDisplayPix(aScreen.rectDisplayPix()),
+      mAvailRectDisplayPix(aScreen.availRectDisplayPix()),
+      mPixelDepth(aScreen.pixelDepth()),
+      mColorDepth(aScreen.colorDepth()),
+      mRefreshRate(aScreen.refreshRate()),
+      mContentsScale(aScreen.contentsScaleFactor()),
+      mDefaultCssScale(aScreen.defaultCSSScaleFactor()),
+      mDPI(aScreen.dpi()),
+      mScreenOrientation(aScreen.orientation()),
+      mOrientationAngle(aScreen.orientationAngle()),
+      mIsPseudoDisplay(aScreen.isPseudoDisplay()) {}
+
+Screen::Screen(const Screen& aOther)
+    : mRect(aOther.mRect),
+      mAvailRect(aOther.mAvailRect),
+      mRectDisplayPix(aOther.mRectDisplayPix),
+      mAvailRectDisplayPix(aOther.mAvailRectDisplayPix),
+      mPixelDepth(aOther.mPixelDepth),
+      mColorDepth(aOther.mColorDepth),
+      mRefreshRate(aOther.mRefreshRate),
+      mContentsScale(aOther.mContentsScale),
+      mDefaultCssScale(aOther.mDefaultCssScale),
+      mDPI(aOther.mDPI),
+      mScreenOrientation(aOther.mScreenOrientation),
+      mOrientationAngle(aOther.mOrientationAngle),
+      mIsPseudoDisplay(aOther.mIsPseudoDisplay) {}
+
+dom::ScreenDetails Screen::ToScreenDetails() const {
+  return dom::ScreenDetails(
+      mRect, mRectDisplayPix, mAvailRect, mAvailRectDisplayPix, mPixelDepth,
+      mColorDepth, mRefreshRate, mContentsScale, mDefaultCssScale, mDPI,
+      mScreenOrientation, mOrientationAngle, mIsPseudoDisplay);
+}
+
+NS_IMETHODIMP
+Screen::GetRect(int32_t* aOutLeft, int32_t* aOutTop, int32_t* aOutWidth,
+                int32_t* aOutHeight) {
+  mRect.GetRect(aOutLeft, aOutTop, aOutWidth, aOutHeight);
+  return NS_OK;
+}
+
+NS_IMETHODIMP
+Screen::GetRectDisplayPix(int32_t* aOutLeft, int32_t* aOutTop,
+                          int32_t* aOutWidth, int32_t* aOutHeight) {
+  mRectDisplayPix.GetRect(aOutLeft, aOutTop, aOutWidth, aOutHeight);
+  return NS_OK;
+}
+
+NS_IMETHODIMP
+Screen::GetAvailRect(int32_t* aOutLeft, int32_t* aOutTop, int32_t* aOutWidth,
+                     int32_t* aOutHeight) {
+  mAvailRect.GetRect(aOutLeft, aOutTop, aOutWidth, aOutHeight);
+  return NS_OK;
+}
+
+NS_IMETHODIMP
+Screen::GetAvailRectDisplayPix(int32_t* aOutLeft, int32_t* aOutTop,
+                               int32_t* aOutWidth, int32_t* aOutHeight) {
+  mAvailRectDisplayPix.GetRect(aOutLeft, aOutTop, aOutWidth, aOutHeight);
+  return NS_OK;
+}
+
+NS_IMETHODIMP
+Screen::GetColorGamut(dom::ScreenColorGamut* aScreenColorGamut) {
+  // TODO(zrhoffman, bug 1771373): Return a wider color gamut when one is
+  // available
+  *aScreenColorGamut = dom::ScreenColorGamut::Srgb;
+  return NS_OK;
+}
+
+NS_IMETHODIMP
+Screen::GetPixelDepth(int32_t* aPixelDepth) {
+  *aPixelDepth = mPixelDepth;
+  return NS_OK;
+}
+
+NS_IMETHODIMP
+Screen::GetColorDepth(int32_t* aColorDepth) {
+  *aColorDepth = mColorDepth;
+  return NS_OK;
+}
+
+NS_IMETHODIMP
+Screen::GetContentsScaleFactor(double* aOutScale) {
+  *aOutScale = mContentsScale.scale;
+  return NS_OK;
+}
+
+CSSToLayoutDeviceScale Screen::GetCSSToLayoutDeviceScale(
+    IncludeOSZoom aIncludeOSZoom) const {
+  auto scale = CSSToLayoutDeviceScale(StaticPrefs::layout_css_devPixelsPerPx());
+  if (scale.scale <= 0.0) {
+    scale = mDefaultCssScale;
+  }
+  if (bool(aIncludeOSZoom)) {
+    scale.scale *= LookAndFeel::SystemZoomSettings().mFullZoom;
+  }
+  return scale;
+}
+
+NS_IMETHODIMP
+Screen::GetDefaultCSSScaleFactor(double* aOutScale) {
+  *aOutScale = GetCSSToLayoutDeviceScale(IncludeOSZoom::Yes).scale;
+  return NS_OK;
+}
+
+NS_IMETHODIMP
+Screen::GetDpi(float* aDPI) {
+  *aDPI = mDPI;
+  return NS_OK;
+}
+
+NS_IMETHODIMP
+Screen::GetRefreshRate(int32_t* aRefreshRate) {
+  *aRefreshRate = mRefreshRate;
+  return NS_OK;
+}
+
+NS_IMETHODIMP
+Screen::GetIsPseudoDisplay(bool* aIsPseudoDisplay) {
+  *aIsPseudoDisplay = mIsPseudoDisplay;
+  return NS_OK;
+}
+
+hal::ScreenOrientation Screen::GetDefaultOrientationType() const {
+  if (mRect.Width() >= mRect.Height()) {
+    if (mOrientationAngle == 0 || mOrientationAngle == 180) {
+      return hal::ScreenOrientation::LandscapePrimary;
+    }
+    return hal::ScreenOrientation::PortraitPrimary;
+  }
+
+  if (mOrientationAngle == 0 || mOrientationAngle == 180) {
+    return hal::ScreenOrientation::PortraitPrimary;
+  }
+  return hal::ScreenOrientation::LandscapePrimary;
+}
+
+}  // namespace mozilla::widget