Adding upstream version 110.0.1.upstream/110.0.1upstream

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

1 files changed, 849 insertions, 0 deletions

diff --git a/widget/windows/nsLookAndFeel.cpp b/widget/windows/nsLookAndFeel.cpp
new file mode 100644
index 0000000000..e0b90ddc96
--- /dev/null
+++ b/widget/windows/nsLookAndFeel.cpp
@@ -0,0 +1,849 @@
+/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* 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 "nsLookAndFeel.h"
+#include <stdint.h>
+#include <windows.h>
+#include <shellapi.h>
+#include "nsStyleConsts.h"
+#include "nsUXThemeData.h"
+#include "nsUXThemeConstants.h"
+#include "nsWindowsHelpers.h"
+#include "WinUtils.h"
+#include "WindowsUIUtils.h"
+#include "mozilla/FontPropertyTypes.h"
+#include "mozilla/Telemetry.h"
+#include "mozilla/WindowsVersion.h"
+#include "gfxFontConstants.h"
+#include "gfxWindowsPlatform.h"
+
+using namespace mozilla;
+using namespace mozilla::widget;
+
+static Maybe<nscolor> GetColorFromTheme(nsUXThemeClass cls, int32_t aPart,
+                                        int32_t aState, int32_t aPropId) {
+  COLORREF color;
+  HRESULT hr = GetThemeColor(nsUXThemeData::GetTheme(cls), aPart, aState,
+                             aPropId, &color);
+  if (hr == S_OK) {
+    return Some(COLOREF_2_NSRGB(color));
+  }
+  return Nothing();
+}
+
+static int32_t GetSystemParam(long flag, int32_t def) {
+  DWORD value;
+  return ::SystemParametersInfo(flag, 0, &value, 0) ? value : def;
+}
+
+static nsresult SystemWantsDarkTheme(int32_t& darkThemeEnabled) {
+  if (!IsWin10OrLater()) {
+    darkThemeEnabled = 0;
+    return NS_OK;
+  }
+
+  nsresult rv = NS_OK;
+  nsCOMPtr<nsIWindowsRegKey> personalizeKey =
+      do_CreateInstance("@mozilla.org/windows-registry-key;1", &rv);
+  if (NS_WARN_IF(NS_FAILED(rv))) {
+    return rv;
+  }
+
+  rv = personalizeKey->Open(
+      nsIWindowsRegKey::ROOT_KEY_CURRENT_USER,
+      nsLiteralString(
+          u"SOFTWARE\\Microsoft\\Windows\\CurrentVersion\\Themes\\Personalize"),
+      nsIWindowsRegKey::ACCESS_QUERY_VALUE);
+  if (NS_FAILED(rv)) {
+    return rv;
+  }
+
+  uint32_t lightThemeEnabled;
+  rv =
+      personalizeKey->ReadIntValue(u"AppsUseLightTheme"_ns, &lightThemeEnabled);
+  if (NS_SUCCEEDED(rv)) {
+    darkThemeEnabled = !lightThemeEnabled;
+  }
+
+  return rv;
+}
+
+nsLookAndFeel::nsLookAndFeel() {
+  mozilla::Telemetry::Accumulate(mozilla::Telemetry::TOUCH_ENABLED_DEVICE,
+                                 WinUtils::IsTouchDeviceSupportPresent());
+}
+
+nsLookAndFeel::~nsLookAndFeel() = default;
+
+void nsLookAndFeel::NativeInit() { EnsureInit(); }
+
+/* virtual */
+void nsLookAndFeel::RefreshImpl() {
+  mInitialized = false;  // Fetch system colors next time they're used.
+  nsXPLookAndFeel::RefreshImpl();
+}
+
+static bool UseNonNativeMenuColors() {
+  if (!LookAndFeel::WindowsNonNativeMenusEnabled()) {
+    return false;
+  }
+  return LookAndFeel::GetInt(LookAndFeel::IntID::WindowsDefaultTheme);
+}
+
+nsresult nsLookAndFeel::NativeGetColor(ColorID aID, ColorScheme aScheme,
+                                       nscolor& aColor) {
+  EnsureInit();
+
+  auto IsHighlightColor = [&] {
+    switch (aID) {
+      case ColorID::MozMenuhover:
+        return !UseNonNativeMenuColors();
+      case ColorID::Highlight:
+      case ColorID::Selecteditem:
+        // We prefer the generic dark selection color if we don't have an
+        // explicit one.
+        return aScheme != ColorScheme::Dark || mDarkHighlight;
+      case ColorID::IMESelectedRawTextBackground:
+      case ColorID::IMESelectedConvertedTextBackground:
+        return true;
+      default:
+        return false;
+    }
+  };
+
+  auto IsHighlightTextColor = [&] {
+    switch (aID) {
+      case ColorID::MozMenubarhovertext:
+        if (UseNonNativeMenuColors()) {
+          return false;
+        }
+        if (!nsUXThemeData::IsAppThemed()) {
+          return nsUXThemeData::AreFlatMenusEnabled();
+        }
+        [[fallthrough]];
+      case ColorID::MozMenuhovertext:
+        if (UseNonNativeMenuColors()) {
+          return false;
+        }
+        return !mColorMenuHoverText;
+      case ColorID::Highlighttext:
+      case ColorID::Selecteditemtext:
+        // We prefer the generic dark selection color if we don't have an
+        // explicit one.
+        return aScheme != ColorScheme::Dark || mDarkHighlightText;
+      case ColorID::IMESelectedRawTextForeground:
+      case ColorID::IMESelectedConvertedTextForeground:
+      case ColorID::MozDragtargetzone:
+        return true;
+      default:
+        return false;
+    }
+  };
+
+  if (IsHighlightColor()) {
+    if (aScheme == ColorScheme::Dark && mDarkHighlight) {
+      aColor = *mDarkHighlight;
+    } else {
+      aColor = GetColorForSysColorIndex(COLOR_HIGHLIGHT);
+    }
+    return NS_OK;
+  }
+
+  if (IsHighlightTextColor()) {
+    if (aScheme == ColorScheme::Dark && mDarkHighlightText) {
+      aColor = *mDarkHighlightText;
+    } else {
+      aColor = GetColorForSysColorIndex(COLOR_HIGHLIGHTTEXT);
+    }
+    return NS_OK;
+  }
+
+  if (aScheme == ColorScheme::Dark) {
+    if (auto color = GenericDarkColor(aID)) {
+      aColor = *color;
+      return NS_OK;
+    }
+  }
+
+  static constexpr auto kNonNativeMenuText = NS_RGB(0x15, 0x14, 0x1a);
+  nsresult res = NS_OK;
+  int idx;
+  switch (aID) {
+    case ColorID::IMERawInputBackground:
+    case ColorID::IMEConvertedTextBackground:
+      aColor = NS_TRANSPARENT;
+      return NS_OK;
+    case ColorID::IMERawInputForeground:
+    case ColorID::IMEConvertedTextForeground:
+      aColor = NS_SAME_AS_FOREGROUND_COLOR;
+      return NS_OK;
+    case ColorID::IMERawInputUnderline:
+    case ColorID::IMEConvertedTextUnderline:
+      aColor = NS_SAME_AS_FOREGROUND_COLOR;
+      return NS_OK;
+    case ColorID::IMESelectedRawTextUnderline:
+    case ColorID::IMESelectedConvertedTextUnderline:
+      aColor = NS_TRANSPARENT;
+      return NS_OK;
+
+    // New CSS 2 Color definitions
+    case ColorID::Activeborder:
+      idx = COLOR_ACTIVEBORDER;
+      break;
+    case ColorID::Activecaption:
+      idx = COLOR_ACTIVECAPTION;
+      break;
+    case ColorID::Appworkspace:
+      idx = COLOR_APPWORKSPACE;
+      break;
+    case ColorID::Background:
+      idx = COLOR_BACKGROUND;
+      break;
+    case ColorID::Buttonface:
+    case ColorID::MozButtonhoverface:
+    case ColorID::MozButtonactiveface:
+    case ColorID::MozButtondisabledface:
+      idx = COLOR_BTNFACE;
+      break;
+    case ColorID::Buttonhighlight:
+      idx = COLOR_BTNHIGHLIGHT;
+      break;
+    case ColorID::Buttonshadow:
+      idx = COLOR_BTNSHADOW;
+      break;
+    case ColorID::Buttontext:
+    case ColorID::MozButtonhovertext:
+    case ColorID::MozButtonactivetext:
+      idx = COLOR_BTNTEXT;
+      break;
+    case ColorID::Captiontext:
+      idx = COLOR_CAPTIONTEXT;
+      break;
+    case ColorID::MozCellhighlighttext:
+      aColor = NS_RGB(0, 0, 0);
+      return NS_OK;
+    case ColorID::MozCellhighlight:
+      aColor = NS_RGB(206, 206, 206);
+      return NS_OK;
+    case ColorID::Graytext:
+      idx = COLOR_GRAYTEXT;
+      break;
+    case ColorID::MozMenubarhovertext:
+      if (UseNonNativeMenuColors()) {
+        aColor = kNonNativeMenuText;
+        return NS_OK;
+      }
+      if (!nsUXThemeData::IsAppThemed()) {
+        idx = COLOR_MENUTEXT;
+        break;
+      }
+      [[fallthrough]];
+    case ColorID::MozMenuhovertext:
+      if (UseNonNativeMenuColors()) {
+        aColor = kNonNativeMenuText;
+        return NS_OK;
+      }
+      if (mColorMenuHoverText) {
+        aColor = *mColorMenuHoverText;
+        return NS_OK;
+      }
+      idx = COLOR_HIGHLIGHTTEXT;
+      break;
+    case ColorID::MozMenuhover:
+      MOZ_ASSERT(UseNonNativeMenuColors());
+      aColor = NS_RGB(0xe0, 0xe0, 0xe6);
+      return NS_OK;
+    case ColorID::MozMenuhoverdisabled:
+      if (UseNonNativeMenuColors()) {
+        aColor = NS_RGB(0xf0, 0xf0, 0xf3);
+        return NS_OK;
+      }
+      aColor = NS_TRANSPARENT;
+      return NS_OK;
+    case ColorID::Inactiveborder:
+      idx = COLOR_INACTIVEBORDER;
+      break;
+    case ColorID::Inactivecaption:
+      idx = COLOR_INACTIVECAPTION;
+      break;
+    case ColorID::Inactivecaptiontext:
+      idx = COLOR_INACTIVECAPTIONTEXT;
+      break;
+    case ColorID::Infobackground:
+      idx = COLOR_INFOBK;
+      break;
+    case ColorID::Infotext:
+      idx = COLOR_INFOTEXT;
+      break;
+    case ColorID::Menu:
+      if (UseNonNativeMenuColors()) {
+        aColor = NS_RGB(0xf9, 0xf9, 0xfb);
+        return NS_OK;
+      }
+      idx = COLOR_MENU;
+      break;
+    case ColorID::Menutext:
+    case ColorID::MozMenubartext:
+      if (UseNonNativeMenuColors()) {
+        aColor = kNonNativeMenuText;
+        return NS_OK;
+      }
+      idx = COLOR_MENUTEXT;
+      break;
+    case ColorID::Scrollbar:
+      idx = COLOR_SCROLLBAR;
+      break;
+    case ColorID::Threeddarkshadow:
+      idx = COLOR_3DDKSHADOW;
+      break;
+    case ColorID::Threedface:
+      idx = COLOR_3DFACE;
+      break;
+    case ColorID::Threedhighlight:
+      idx = COLOR_3DHIGHLIGHT;
+      break;
+    case ColorID::Threedlightshadow:
+    case ColorID::Buttonborder:
+    case ColorID::MozDisabledfield:
+      idx = COLOR_3DLIGHT;
+      break;
+    case ColorID::Threedshadow:
+      idx = COLOR_3DSHADOW;
+      break;
+    case ColorID::Window:
+      idx = COLOR_WINDOW;
+      break;
+    case ColorID::Windowframe:
+      idx = COLOR_WINDOWFRAME;
+      break;
+    case ColorID::Windowtext:
+      idx = COLOR_WINDOWTEXT;
+      break;
+    case ColorID::MozEventreerow:
+    case ColorID::MozOddtreerow:
+    case ColorID::Field:
+    case ColorID::MozCombobox:
+      idx = COLOR_WINDOW;
+      break;
+    case ColorID::Fieldtext:
+    case ColorID::MozComboboxtext:
+      idx = COLOR_WINDOWTEXT;
+      break;
+    case ColorID::MozDialog:
+      idx = COLOR_3DFACE;
+      break;
+    case ColorID::Accentcolor:
+      if (mColorAccent) {
+        aColor = *mColorAccent;
+      } else {
+        // Seems to be the default color (hardcoded because of bug 1065998)
+        aColor = NS_RGB(0, 120, 215);
+      }
+      return NS_OK;
+    case ColorID::Accentcolortext:
+      if (mColorAccentText) {
+        aColor = *mColorAccentText;
+      } else {
+        aColor = NS_RGB(255, 255, 255);
+      }
+      return NS_OK;
+    case ColorID::MozWinMediatext:
+      if (mColorMediaText) {
+        aColor = *mColorMediaText;
+        return NS_OK;
+      }
+      // if we've gotten here just return -moz-dialogtext instead
+      idx = COLOR_WINDOWTEXT;
+      break;
+    case ColorID::MozWinCommunicationstext:
+      if (mColorCommunicationsText) {
+        aColor = *mColorCommunicationsText;
+        return NS_OK;
+      }
+      // if we've gotten here just return -moz-dialogtext instead
+      idx = COLOR_WINDOWTEXT;
+      break;
+    case ColorID::MozDialogtext:
+    case ColorID::MozColheadertext:
+    case ColorID::MozColheaderhovertext:
+      idx = COLOR_WINDOWTEXT;
+      break;
+    case ColorID::MozButtondefault:
+      idx = COLOR_3DDKSHADOW;
+      break;
+    case ColorID::MozNativehyperlinktext:
+      idx = COLOR_HOTLIGHT;
+      break;
+    case ColorID::Marktext:
+    case ColorID::Mark:
+    case ColorID::SpellCheckerUnderline:
+      aColor = GetStandinForNativeColor(aID, aScheme);
+      return NS_OK;
+    default:
+      idx = COLOR_WINDOW;
+      res = NS_ERROR_FAILURE;
+      break;
+  }
+
+  aColor = GetColorForSysColorIndex(idx);
+
+  return res;
+}
+
+nsresult nsLookAndFeel::NativeGetInt(IntID aID, int32_t& aResult) {
+  EnsureInit();
+  nsresult res = NS_OK;
+
+  switch (aID) {
+    case IntID::ScrollButtonLeftMouseButtonAction:
+      aResult = 0;
+      break;
+    case IntID::ScrollButtonMiddleMouseButtonAction:
+    case IntID::ScrollButtonRightMouseButtonAction:
+      aResult = 3;
+      break;
+    case IntID::CaretBlinkTime:
+      aResult = static_cast<int32_t>(::GetCaretBlinkTime());
+      break;
+    case IntID::CaretBlinkCount: {
+      int32_t timeout = GetSystemParam(SPI_GETCARETTIMEOUT, 5000);
+      auto blinkTime = ::GetCaretBlinkTime();
+      if (timeout <= 0 || blinkTime <= 0) {
+        aResult = -1;
+        break;
+      }
+      // 2 * blinkTime because this integer is a full blink cycle.
+      aResult = std::ceil(float(timeout) / (2.0f * float(blinkTime)));
+      break;
+    }
+
+    case IntID::CaretWidth:
+      aResult = 1;
+      break;
+    case IntID::ShowCaretDuringSelection:
+      aResult = 0;
+      break;
+    case IntID::SelectTextfieldsOnKeyFocus:
+      // Select textfield content when focused by kbd
+      // used by EventStateManager::sTextfieldSelectModel
+      aResult = 1;
+      break;
+    case IntID::SubmenuDelay:
+      // This will default to the Windows' default
+      // (400ms) on error.
+      aResult = GetSystemParam(SPI_GETMENUSHOWDELAY, 400);
+      break;
+    case IntID::TooltipDelay:
+      aResult = 500;
+      break;
+    case IntID::MenusCanOverlapOSBar:
+      // we want XUL popups to be able to overlap the task bar.
+      aResult = 1;
+      break;
+    case IntID::DragThresholdX:
+      // The system metric is the number of pixels at which a drag should
+      // start.  Our look and feel metric is the number of pixels you can
+      // move before starting a drag, so subtract 1.
+      aResult = ::GetSystemMetrics(SM_CXDRAG) - 1;
+      break;
+    case IntID::DragThresholdY:
+      aResult = ::GetSystemMetrics(SM_CYDRAG) - 1;
+      break;
+    case IntID::UseAccessibilityTheme:
+      // High contrast is a misnomer under Win32 -- any theme can be used with
+      // it, e.g. normal contrast with large fonts, low contrast, etc. The high
+      // contrast flag really means -- use this theme and don't override it.
+      aResult = nsUXThemeData::IsHighContrastOn();
+      break;
+    case IntID::ScrollArrowStyle:
+      aResult = eScrollArrowStyle_Single;
+      break;
+    case IntID::TreeOpenDelay:
+      aResult = 1000;
+      break;
+    case IntID::TreeCloseDelay:
+      aResult = 0;
+      break;
+    case IntID::TreeLazyScrollDelay:
+      aResult = 150;
+      break;
+    case IntID::TreeScrollDelay:
+      aResult = 100;
+      break;
+    case IntID::TreeScrollLinesMax:
+      aResult = 3;
+      break;
+    case IntID::WindowsClassic:
+      aResult = !nsUXThemeData::IsAppThemed();
+      break;
+    case IntID::WindowsDefaultTheme:
+      aResult = nsUXThemeData::IsDefaultWindowTheme();
+      break;
+    case IntID::ShowKeyboardCues: {
+      BOOL show = FALSE;
+      ::SystemParametersInfoW(SPI_GETKEYBOARDCUES, 0, &show, 0);
+      aResult = show;
+      break;
+    }
+    case IntID::DWMCompositor:
+      aResult = gfxWindowsPlatform::GetPlatform()->DwmCompositionEnabled();
+      break;
+    case IntID::WindowsAccentColorInTitlebar: {
+      aResult = 0;
+      if (NS_WARN_IF(!mColorAccent)) {
+        break;
+      }
+
+      if (!mDwmKey) {
+        mDwmKey = do_CreateInstance("@mozilla.org/windows-registry-key;1");
+        if (!mDwmKey) {
+          break;
+        }
+      }
+      uint32_t colorPrevalence;
+      nsresult rv = mDwmKey->Open(nsIWindowsRegKey::ROOT_KEY_CURRENT_USER,
+                                  u"SOFTWARE\\Microsoft\\Windows\\DWM"_ns,
+                                  nsIWindowsRegKey::ACCESS_QUERY_VALUE);
+      if (NS_WARN_IF(NS_FAILED(rv))) {
+        return rv;
+      }
+
+      // The ColorPrevalence value is set to 1 when the "Show color on title
+      // bar" setting in the Color section of Window's Personalization settings
+      // is turned on.
+      aResult = (NS_SUCCEEDED(mDwmKey->ReadIntValue(u"ColorPrevalence"_ns,
+                                                    &colorPrevalence)) &&
+                 colorPrevalence == 1)
+                    ? 1
+                    : 0;
+
+      mDwmKey->Close();
+    } break;
+    case IntID::WindowsGlass:
+      // Aero Glass is only available prior to Windows 8 when DWM is used.
+      aResult = (gfxWindowsPlatform::GetPlatform()->DwmCompositionEnabled() &&
+                 !IsWin8OrLater());
+      break;
+    case IntID::AlertNotificationOrigin:
+      aResult = 0;
+      {
+        // Get task bar window handle
+        HWND shellWindow = FindWindowW(L"Shell_TrayWnd", nullptr);
+
+        if (shellWindow != nullptr) {
+          // Determine position
+          APPBARDATA appBarData;
+          appBarData.hWnd = shellWindow;
+          appBarData.cbSize = sizeof(appBarData);
+          if (SHAppBarMessage(ABM_GETTASKBARPOS, &appBarData)) {
+            // Set alert origin as a bit field - see LookAndFeel.h
+            // 0 represents bottom right, sliding vertically.
+            switch (appBarData.uEdge) {
+              case ABE_LEFT:
+                aResult = NS_ALERT_HORIZONTAL | NS_ALERT_LEFT;
+                break;
+              case ABE_RIGHT:
+                aResult = NS_ALERT_HORIZONTAL;
+                break;
+              case ABE_TOP:
+                aResult = NS_ALERT_TOP;
+                [[fallthrough]];
+              case ABE_BOTTOM:
+                // If the task bar is right-to-left,
+                // move the origin to the left
+                if (::GetWindowLong(shellWindow, GWL_EXSTYLE) & WS_EX_LAYOUTRTL)
+                  aResult |= NS_ALERT_LEFT;
+                break;
+            }
+          }
+        }
+      }
+      break;
+    case IntID::IMERawInputUnderlineStyle:
+    case IntID::IMEConvertedTextUnderlineStyle:
+      aResult = static_cast<int32_t>(StyleTextDecorationStyle::Dashed);
+      break;
+    case IntID::IMESelectedRawTextUnderlineStyle:
+    case IntID::IMESelectedConvertedTextUnderline:
+      aResult = static_cast<int32_t>(StyleTextDecorationStyle::None);
+      break;
+    case IntID::SpellCheckerUnderlineStyle:
+      aResult = static_cast<int32_t>(StyleTextDecorationStyle::Wavy);
+      break;
+    case IntID::ScrollbarButtonAutoRepeatBehavior:
+      aResult = 0;
+      break;
+    case IntID::SwipeAnimationEnabled:
+      // Forcibly enable the swipe animation on Windows. It doesn't matter on
+      // platforms where "Drag two fingers to scroll" isn't supported since on
+      // the platforms we will never generate any swipe gesture events.
+      aResult = 1;
+      break;
+    case IntID::UseOverlayScrollbars:
+      aResult = WindowsUIUtils::ComputeOverlayScrollbars();
+      break;
+    case IntID::AllowOverlayScrollbarsOverlap:
+      aResult = 0;
+      break;
+    case IntID::ScrollbarDisplayOnMouseMove:
+      aResult = 1;
+      break;
+    case IntID::ScrollbarFadeBeginDelay:
+      aResult = 2500;
+      break;
+    case IntID::ScrollbarFadeDuration:
+      aResult = 350;
+      break;
+    case IntID::ContextMenuOffsetVertical:
+    case IntID::ContextMenuOffsetHorizontal:
+      aResult = 2;
+      break;
+    case IntID::SystemUsesDarkTheme:
+      res = SystemWantsDarkTheme(aResult);
+      break;
+    case IntID::SystemVerticalScrollbarWidth:
+      aResult = WinUtils::GetSystemMetricsForDpi(SM_CXVSCROLL, 96);
+      break;
+    case IntID::SystemHorizontalScrollbarHeight:
+      aResult = WinUtils::GetSystemMetricsForDpi(SM_CXHSCROLL, 96);
+      break;
+    case IntID::PrefersReducedMotion: {
+      BOOL enable = TRUE;
+      ::SystemParametersInfoW(SPI_GETCLIENTAREAANIMATION, 0, &enable, 0);
+      aResult = !enable;
+      break;
+    }
+    case IntID::PrimaryPointerCapabilities: {
+      aResult = static_cast<int32_t>(
+          widget::WinUtils::GetPrimaryPointerCapabilities());
+      break;
+    }
+    case IntID::AllPointerCapabilities: {
+      aResult =
+          static_cast<int32_t>(widget::WinUtils::GetAllPointerCapabilities());
+      break;
+    }
+    case IntID::TouchDeviceSupportPresent:
+      aResult = WinUtils::IsTouchDeviceSupportPresent() ? 1 : 0;
+      break;
+    case IntID::PanelAnimations:
+      aResult = 1;
+      break;
+    default:
+      aResult = 0;
+      res = NS_ERROR_FAILURE;
+  }
+  return res;
+}
+
+nsresult nsLookAndFeel::NativeGetFloat(FloatID aID, float& aResult) {
+  nsresult res = NS_OK;
+
+  switch (aID) {
+    case FloatID::IMEUnderlineRelativeSize:
+      aResult = 1.0f;
+      break;
+    case FloatID::SpellCheckerUnderlineRelativeSize:
+      aResult = 1.0f;
+      break;
+    case FloatID::TextScaleFactor:
+      aResult = WindowsUIUtils::ComputeTextScaleFactor();
+      break;
+    default:
+      aResult = -1.0;
+      res = NS_ERROR_FAILURE;
+  }
+  return res;
+}
+
+LookAndFeelFont nsLookAndFeel::GetLookAndFeelFontInternal(
+    const LOGFONTW& aLogFont, bool aUseShellDlg) {
+  LookAndFeelFont result{};
+
+  result.haveFont() = false;
+
+  // Get scaling factor from physical to logical pixels
+  double pixelScale =
+      1.0 / WinUtils::SystemScaleFactor() / LookAndFeel::GetTextScaleFactor();
+
+  // The lfHeight is in pixels, and it needs to be adjusted for the
+  // device it will be displayed on.
+  // Screens and Printers will differ in DPI
+  //
+  // So this accounts for the difference in the DeviceContexts
+  // The pixelScale will typically be 1.0 for the screen
+  // (though larger for hi-dpi screens where the Windows resolution
+  // scale factor is 125% or 150% or even more), and could be
+  // any value when going to a printer, for example pixelScale is
+  // 6.25 when going to a 600dpi printer.
+  float pixelHeight = -aLogFont.lfHeight;
+  if (pixelHeight < 0) {
+    nsAutoFont hFont(::CreateFontIndirectW(&aLogFont));
+    if (!hFont) {
+      return result;
+    }
+
+    nsAutoHDC dc(::GetDC(nullptr));
+    HGDIOBJ hObject = ::SelectObject(dc, hFont);
+    TEXTMETRIC tm;
+    ::GetTextMetrics(dc, &tm);
+    ::SelectObject(dc, hObject);
+
+    pixelHeight = tm.tmAscent;
+  }
+
+  pixelHeight *= pixelScale;
+
+  // we have problem on Simplified Chinese system because the system
+  // report the default font size is 8 points. but if we use 8, the text
+  // display very ugly. force it to be at 9 points (12 pixels) on that
+  // system (cp936), but leave other sizes alone.
+  if (pixelHeight < 12 && ::GetACP() == 936) {
+    pixelHeight = 12;
+  }
+
+  result.haveFont() = true;
+
+  if (aUseShellDlg) {
+    result.name() = u"MS Shell Dlg 2"_ns;
+  } else {
+    result.name() = aLogFont.lfFaceName;
+  }
+
+  result.size() = pixelHeight;
+  result.italic() = !!aLogFont.lfItalic;
+  // FIXME: Other weights?
+  result.weight() =
+      ((aLogFont.lfWeight == FW_BOLD) ? FontWeight::BOLD : FontWeight::NORMAL)
+          .ToFloat();
+
+  return result;
+}
+
+LookAndFeelFont nsLookAndFeel::GetLookAndFeelFont(LookAndFeel::FontID anID) {
+  LookAndFeelFont result{};
+
+  result.haveFont() = false;
+
+  // FontID::Icon is handled differently than the others
+  if (anID == LookAndFeel::FontID::Icon) {
+    LOGFONTW logFont;
+    if (::SystemParametersInfoW(SPI_GETICONTITLELOGFONT, sizeof(logFont),
+                                (PVOID)&logFont, 0)) {
+      result = GetLookAndFeelFontInternal(logFont, false);
+    }
+    return result;
+  }
+
+  NONCLIENTMETRICSW ncm;
+  ncm.cbSize = sizeof(NONCLIENTMETRICSW);
+  if (!::SystemParametersInfoW(SPI_GETNONCLIENTMETRICS, sizeof(ncm),
+                               (PVOID)&ncm, 0)) {
+    return result;
+  }
+
+  switch (anID) {
+    case LookAndFeel::FontID::Menu:
+    case LookAndFeel::FontID::MozPullDownMenu:
+      result = GetLookAndFeelFontInternal(ncm.lfMenuFont, false);
+      break;
+    case LookAndFeel::FontID::Caption:
+      result = GetLookAndFeelFontInternal(ncm.lfCaptionFont, false);
+      break;
+    case LookAndFeel::FontID::SmallCaption:
+      result = GetLookAndFeelFontInternal(ncm.lfSmCaptionFont, false);
+      break;
+    case LookAndFeel::FontID::StatusBar:
+      result = GetLookAndFeelFontInternal(ncm.lfStatusFont, false);
+      break;
+    case LookAndFeel::FontID::MozButton:
+    case LookAndFeel::FontID::MozField:
+    case LookAndFeel::FontID::MozList:
+      // XXX It's not clear to me whether this is exactly the right
+      // set of LookAndFeel values to map to the dialog font; we may
+      // want to add or remove cases here after reviewing the visual
+      // results under various Windows versions.
+      result = GetLookAndFeelFontInternal(ncm.lfMessageFont, true);
+      break;
+    default:
+      result = GetLookAndFeelFontInternal(ncm.lfMessageFont, false);
+      break;
+  }
+
+  return result;
+}
+
+bool nsLookAndFeel::NativeGetFont(LookAndFeel::FontID anID, nsString& aFontName,
+                                  gfxFontStyle& aFontStyle) {
+  LookAndFeelFont font = GetLookAndFeelFont(anID);
+  return LookAndFeelFontToStyle(font, aFontName, aFontStyle);
+}
+
+/* virtual */
+char16_t nsLookAndFeel::GetPasswordCharacterImpl() {
+#define UNICODE_BLACK_CIRCLE_CHAR 0x25cf
+  return UNICODE_BLACK_CIRCLE_CHAR;
+}
+
+static Maybe<nscolor> GetAccentColorText(const Maybe<nscolor>& aAccentColor) {
+  if (!aAccentColor) {
+    return Nothing();
+  }
+  // We want the color that we return for text that will be drawn over
+  // a background that has the accent color to have good contrast with
+  // the accent color.  Windows itself uses either white or black text
+  // depending on how light or dark the accent color is.  We do the same
+  // here based on the luminance of the accent color with a threshhold
+  // value.  This algorithm should match what Windows does.  It comes from:
+  //
+  // https://docs.microsoft.com/en-us/windows/uwp/style/color
+  float luminance = (NS_GET_R(*aAccentColor) * 2 + NS_GET_G(*aAccentColor) * 5 +
+                     NS_GET_B(*aAccentColor)) /
+                    8;
+
+  return Some(luminance <= 128 ? NS_RGB(255, 255, 255) : NS_RGB(0, 0, 0));
+}
+
+nscolor nsLookAndFeel::GetColorForSysColorIndex(int index) {
+  MOZ_ASSERT(index >= SYS_COLOR_MIN && index <= SYS_COLOR_MAX);
+  return mSysColorTable[index - SYS_COLOR_MIN];
+}
+
+void nsLookAndFeel::EnsureInit() {
+  if (mInitialized) {
+    return;
+  }
+  mInitialized = true;
+
+  mColorAccent = WindowsUIUtils::GetAccentColor();
+  mColorAccentText = GetAccentColorText(mColorAccent);
+
+  if (nsUXThemeData::IsAppThemed()) {
+    mColorMenuHoverText =
+        ::GetColorFromTheme(eUXMenu, MENU_POPUPITEM, MPI_HOT, TMT_TEXTCOLOR);
+    mColorMediaText = ::GetColorFromTheme(eUXMediaToolbar, TP_BUTTON, TS_NORMAL,
+                                          TMT_TEXTCOLOR);
+    mColorCommunicationsText = ::GetColorFromTheme(
+        eUXCommunicationsToolbar, TP_BUTTON, TS_NORMAL, TMT_TEXTCOLOR);
+  }
+
+  // Fill out the sys color table.
+  for (int i = SYS_COLOR_MIN; i <= SYS_COLOR_MAX; ++i) {
+    mSysColorTable[i - SYS_COLOR_MIN] = [&] {
+      if (auto c = WindowsUIUtils::GetSystemColor(ColorScheme::Light, i)) {
+        return *c;
+      }
+      DWORD color = ::GetSysColor(i);
+      return COLOREF_2_NSRGB(color);
+    }();
+  }
+
+  mDarkHighlight =
+      WindowsUIUtils::GetSystemColor(ColorScheme::Dark, COLOR_HIGHLIGHT);
+  mDarkHighlightText =
+      WindowsUIUtils::GetSystemColor(ColorScheme::Dark, COLOR_HIGHLIGHTTEXT);
+
+  RecordTelemetry();
+}