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	It's suitable for foreground colors only. Differential Revision: https://phabricator.services.mozilla.com/D221557
		
			
				
	
	
		
			600 lines
		
	
	
	
		
			21 KiB
		
	
	
	
		
			C++
		
	
	
	
	
	
			
		
		
	
	
			600 lines
		
	
	
	
		
			21 KiB
		
	
	
	
		
			C++
		
	
	
	
	
	
/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
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/* vim: set ts=8 sts=2 et sw=2 tw=80: */
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/* This Source Code Form is subject to the terms of the Mozilla Public
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 * License, v. 2.0. If a copy of the MPL was not distributed with this
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 * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
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#include "nsTextPaintStyle.h"
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#include "nsCSSColorUtils.h"
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#include "nsCSSRendering.h"
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#include "nsFrameSelection.h"
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#include "nsLayoutUtils.h"
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#include "nsTextFrame.h"
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#include "nsStyleConsts.h"
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#include "mozilla/LookAndFeel.h"
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using namespace mozilla;
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using namespace mozilla::dom;
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static nscolor EnsureDifferentColors(nscolor colorA, nscolor colorB) {
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  if (colorA == colorB) {
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    nscolor res;
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    res = NS_RGB(NS_GET_R(colorA) ^ 0xff, NS_GET_G(colorA) ^ 0xff,
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                 NS_GET_B(colorA) ^ 0xff);
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    return res;
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  }
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  return colorA;
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}
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nsTextPaintStyle::nsTextPaintStyle(nsTextFrame* aFrame)
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    : mFrame(aFrame),
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      mPresContext(aFrame->PresContext()),
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      mInitCommonColors(false),
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      mInitSelectionColorsAndShadow(false),
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      mResolveColors(true),
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      mSelectionTextColor(NS_RGBA(0, 0, 0, 0)),
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      mSelectionBGColor(NS_RGBA(0, 0, 0, 0)),
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      mSufficientContrast(0),
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      mFrameBackgroundColor(NS_RGBA(0, 0, 0, 0)),
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      mSystemFieldForegroundColor(NS_RGBA(0, 0, 0, 0)),
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      mSystemFieldBackgroundColor(NS_RGBA(0, 0, 0, 0)) {}
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bool nsTextPaintStyle::EnsureSufficientContrast(nscolor* aForeColor,
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                                                nscolor* aBackColor) {
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  InitCommonColors();
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  const bool sameAsForeground = *aForeColor == NS_SAME_AS_FOREGROUND_COLOR;
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  if (sameAsForeground) {
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    *aForeColor = GetTextColor();
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  }
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  // If the combination of selection background color and frame background color
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  // has sufficient contrast, don't exchange the selection colors.
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  //
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  // Note we use a different threshold here: mSufficientContrast is for contrast
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  // between text and background colors, but since we're diffing two
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  // backgrounds, we don't need that much contrast.  We match the heuristic from
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  // NS_SUFFICIENT_LUMINOSITY_DIFFERENCE_BG and use 20% of mSufficientContrast.
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  const int32_t minLuminosityDifferenceForBackground = mSufficientContrast / 5;
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  const int32_t backLuminosityDifference =
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      NS_LUMINOSITY_DIFFERENCE(*aBackColor, mFrameBackgroundColor);
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  if (backLuminosityDifference >= minLuminosityDifferenceForBackground) {
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    return false;
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  }
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  // Otherwise, we should use the higher-contrast color for the selection
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  // background color.
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  //
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  // For NS_SAME_AS_FOREGROUND_COLOR we only do this if the background is
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  // totally indistinguishable, that is, if the luminosity difference is 0.
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  if (sameAsForeground && backLuminosityDifference) {
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    return false;
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  }
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  int32_t foreLuminosityDifference =
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      NS_LUMINOSITY_DIFFERENCE(*aForeColor, mFrameBackgroundColor);
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  if (backLuminosityDifference < foreLuminosityDifference) {
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    std::swap(*aForeColor, *aBackColor);
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    // Ensure foreground color is opaque to guarantee contrast.
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    *aForeColor = NS_RGB(NS_GET_R(*aForeColor), NS_GET_G(*aForeColor),
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                         NS_GET_B(*aForeColor));
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    return true;
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  }
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  return false;
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}
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nscolor nsTextPaintStyle::GetTextColor() {
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  if (mFrame->IsInSVGTextSubtree()) {
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    if (!mResolveColors) {
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      return NS_SAME_AS_FOREGROUND_COLOR;
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    }
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    const nsStyleSVG* style = mFrame->StyleSVG();
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    switch (style->mFill.kind.tag) {
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      case StyleSVGPaintKind::Tag::None:
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        return NS_RGBA(0, 0, 0, 0);
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      case StyleSVGPaintKind::Tag::Color:
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        return nsLayoutUtils::GetTextColor(mFrame, &nsStyleSVG::mFill);
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      default:
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        NS_ERROR("cannot resolve SVG paint to nscolor");
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        return NS_RGBA(0, 0, 0, 255);
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    }
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  }
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  return nsLayoutUtils::GetTextColor(mFrame,
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                                     &nsStyleText::mWebkitTextFillColor);
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}
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bool nsTextPaintStyle::GetSelectionColors(nscolor* aForeColor,
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                                          nscolor* aBackColor) {
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  NS_ASSERTION(aForeColor, "aForeColor is null");
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  NS_ASSERTION(aBackColor, "aBackColor is null");
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  if (!InitSelectionColorsAndShadow()) {
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    return false;
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  }
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  *aForeColor = mSelectionTextColor;
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  *aBackColor = mSelectionBGColor;
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  return true;
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}
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void nsTextPaintStyle::GetHighlightColors(nscolor* aForeColor,
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                                          nscolor* aBackColor) {
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  NS_ASSERTION(aForeColor, "aForeColor is null");
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  NS_ASSERTION(aBackColor, "aBackColor is null");
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  const nsFrameSelection* frameSelection = mFrame->GetConstFrameSelection();
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  const Selection* selection =
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      frameSelection->GetSelection(SelectionType::eFind);
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  const SelectionCustomColors* customColors = nullptr;
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  if (selection) {
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    customColors = selection->GetCustomColors();
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  }
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  if (!customColors) {
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    nscolor backColor = LookAndFeel::Color(
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        LookAndFeel::ColorID::TextHighlightBackground, mFrame);
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    nscolor foreColor = LookAndFeel::Color(
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        LookAndFeel::ColorID::TextHighlightForeground, mFrame);
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    EnsureSufficientContrast(&foreColor, &backColor);
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    *aForeColor = foreColor;
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    *aBackColor = backColor;
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    return;
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  }
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  if (customColors->mForegroundColor && customColors->mBackgroundColor) {
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    nscolor foreColor = *customColors->mForegroundColor;
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    nscolor backColor = *customColors->mBackgroundColor;
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    if (EnsureSufficientContrast(&foreColor, &backColor) &&
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        customColors->mAltForegroundColor &&
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        customColors->mAltBackgroundColor) {
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      foreColor = *customColors->mAltForegroundColor;
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      backColor = *customColors->mAltBackgroundColor;
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    }
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    *aForeColor = foreColor;
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    *aBackColor = backColor;
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    return;
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  }
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  InitCommonColors();
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  if (customColors->mBackgroundColor) {
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    // !mForegroundColor means "currentColor"; the current color of the text.
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    nscolor foreColor = GetTextColor();
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    nscolor backColor = *customColors->mBackgroundColor;
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    int32_t luminosityDifference =
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        NS_LUMINOSITY_DIFFERENCE(foreColor, backColor);
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    if (mSufficientContrast > luminosityDifference &&
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        customColors->mAltBackgroundColor) {
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      int32_t altLuminosityDifference = NS_LUMINOSITY_DIFFERENCE(
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          foreColor, *customColors->mAltBackgroundColor);
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      if (luminosityDifference < altLuminosityDifference) {
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        backColor = *customColors->mAltBackgroundColor;
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      }
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    }
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    *aForeColor = foreColor;
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    *aBackColor = backColor;
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    return;
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  }
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  if (customColors->mForegroundColor) {
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    nscolor foreColor = *customColors->mForegroundColor;
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    // !mBackgroundColor means "transparent"; the current color of the
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    // background.
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    int32_t luminosityDifference =
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        NS_LUMINOSITY_DIFFERENCE(foreColor, mFrameBackgroundColor);
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    if (mSufficientContrast > luminosityDifference &&
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        customColors->mAltForegroundColor) {
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      int32_t altLuminosityDifference = NS_LUMINOSITY_DIFFERENCE(
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          *customColors->mForegroundColor, mFrameBackgroundColor);
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      if (luminosityDifference < altLuminosityDifference) {
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        foreColor = *customColors->mAltForegroundColor;
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      }
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    }
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    *aForeColor = foreColor;
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    *aBackColor = NS_TRANSPARENT;
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    return;
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  }
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  // There are neither mForegroundColor nor mBackgroundColor.
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  *aForeColor = GetTextColor();
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  *aBackColor = NS_TRANSPARENT;
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}
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void nsTextPaintStyle::GetTargetTextColors(nscolor* aForeColor,
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                                           nscolor* aBackColor) {
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  NS_ASSERTION(aForeColor, "aForeColor is null");
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  NS_ASSERTION(aBackColor, "aBackColor is null");
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  const RefPtr<const ComputedStyle> targetTextStyle =
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      mFrame->ComputeTargetTextStyle();
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  if (targetTextStyle) {
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    *aForeColor = targetTextStyle->GetVisitedDependentColor(
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        &nsStyleText::mWebkitTextFillColor);
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    *aBackColor = targetTextStyle->GetVisitedDependentColor(
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        &nsStyleBackground::mBackgroundColor);
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    return;
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  }
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  *aBackColor =
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      LookAndFeel::Color(LookAndFeel::ColorID::TargetTextBackground, mFrame);
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  *aForeColor =
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      LookAndFeel::Color(LookAndFeel::ColorID::TargetTextForeground, mFrame);
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}
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bool nsTextPaintStyle::GetCustomHighlightTextColor(nsAtom* aHighlightName,
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                                                   nscolor* aForeColor) {
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  NS_ASSERTION(aForeColor, "aForeColor is null");
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  // non-existing highlights will be stored as `aHighlightName->nullptr`,
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  // so subsequent calls only need a hashtable lookup and don't have
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  // to enter the style engine.
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  RefPtr<ComputedStyle> highlightStyle =
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      mCustomHighlightPseudoStyles.LookupOrInsertWith(
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          aHighlightName, [this, &aHighlightName] {
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            return mFrame->ComputeHighlightSelectionStyle(aHighlightName);
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          });
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  if (!highlightStyle) {
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    // highlight `aHighlightName` doesn't exist or has no style rules.
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    return false;
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  }
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  *aForeColor = highlightStyle->GetVisitedDependentColor(
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      &nsStyleText::mWebkitTextFillColor);
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  return highlightStyle->HasAuthorSpecifiedTextColor();
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}
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bool nsTextPaintStyle::GetCustomHighlightBackgroundColor(nsAtom* aHighlightName,
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                                                         nscolor* aBackColor) {
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  NS_ASSERTION(aBackColor, "aBackColor is null");
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  // non-existing highlights will be stored as `aHighlightName->nullptr`,
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  // so subsequent calls only need a hashtable lookup and don't have
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  // to enter the style engine.
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  RefPtr<ComputedStyle> highlightStyle =
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      mCustomHighlightPseudoStyles.LookupOrInsertWith(
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          aHighlightName, [this, &aHighlightName] {
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            return mFrame->ComputeHighlightSelectionStyle(aHighlightName);
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          });
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  if (!highlightStyle) {
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    // highlight `aHighlightName` doesn't exist or has no style rules.
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    return false;
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  }
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  *aBackColor = highlightStyle->GetVisitedDependentColor(
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      &nsStyleBackground::mBackgroundColor);
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  return NS_GET_A(*aBackColor) != 0;
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}
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void nsTextPaintStyle::GetURLSecondaryColor(nscolor* aForeColor) {
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  NS_ASSERTION(aForeColor, "aForeColor is null");
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  const nscolor textColor = GetTextColor();
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  *aForeColor = NS_RGBA(NS_GET_R(textColor), NS_GET_G(textColor),
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                        NS_GET_B(textColor), 127);
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}
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void nsTextPaintStyle::GetIMESelectionColors(SelectionStyleIndex aIndex,
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                                             nscolor* aForeColor,
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                                             nscolor* aBackColor) {
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  NS_ASSERTION(aForeColor, "aForeColor is null");
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  NS_ASSERTION(aBackColor, "aBackColor is null");
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  nsSelectionStyle* selectionStyle = SelectionStyle(aIndex);
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  *aForeColor = selectionStyle->mTextColor;
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  *aBackColor = selectionStyle->mBGColor;
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}
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bool nsTextPaintStyle::GetSelectionUnderlineForPaint(
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    SelectionStyleIndex aIndex, nscolor* aLineColor, float* aRelativeSize,
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    StyleTextDecorationStyle* aStyle) {
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  NS_ASSERTION(aLineColor, "aLineColor is null");
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  NS_ASSERTION(aRelativeSize, "aRelativeSize is null");
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  nsSelectionStyle* selectionStyle = SelectionStyle(aIndex);
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  if (selectionStyle->mUnderlineStyle == StyleTextDecorationStyle::None ||
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      selectionStyle->mUnderlineColor == NS_TRANSPARENT ||
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      selectionStyle->mUnderlineRelativeSize <= 0.0f)
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    return false;
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  *aLineColor = selectionStyle->mUnderlineColor;
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  *aRelativeSize = selectionStyle->mUnderlineRelativeSize;
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  *aStyle = selectionStyle->mUnderlineStyle;
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  return true;
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}
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void nsTextPaintStyle::InitCommonColors() {
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  if (mInitCommonColors) {
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    return;
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  }
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  auto bgColor = nsCSSRendering::FindEffectiveBackgroundColor(mFrame);
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  mFrameBackgroundColor = bgColor.mColor;
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  mSystemFieldForegroundColor =
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      LookAndFeel::Color(LookAndFeel::ColorID::Fieldtext, mFrame);
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  mSystemFieldBackgroundColor =
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      LookAndFeel::Color(LookAndFeel::ColorID::Field, mFrame);
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  if (bgColor.mIsThemed) {
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    // Assume a native widget has sufficient contrast always
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    mSufficientContrast = 0;
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    mInitCommonColors = true;
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    return;
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  }
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  nscolor defaultWindowBackgroundColor =
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      LookAndFeel::Color(LookAndFeel::ColorID::Window, mFrame);
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  nscolor selectionTextColor =
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      LookAndFeel::Color(LookAndFeel::ColorID::Highlighttext, mFrame);
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  nscolor selectionBGColor =
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      LookAndFeel::Color(LookAndFeel::ColorID::Highlight, mFrame);
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  mSufficientContrast = std::min(
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      std::min(NS_SUFFICIENT_LUMINOSITY_DIFFERENCE,
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               NS_LUMINOSITY_DIFFERENCE(selectionTextColor, selectionBGColor)),
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      NS_LUMINOSITY_DIFFERENCE(defaultWindowBackgroundColor, selectionBGColor));
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  mInitCommonColors = true;
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}
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nscolor nsTextPaintStyle::GetSystemFieldForegroundColor() {
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  InitCommonColors();
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  return mSystemFieldForegroundColor;
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}
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nscolor nsTextPaintStyle::GetSystemFieldBackgroundColor() {
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  InitCommonColors();
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  return mSystemFieldBackgroundColor;
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}
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bool nsTextPaintStyle::InitSelectionColorsAndShadow() {
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  if (mInitSelectionColorsAndShadow) {
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    return true;
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  }
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  int16_t selectionFlags;
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  const int16_t selectionStatus = mFrame->GetSelectionStatus(&selectionFlags);
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  if (!(selectionFlags & nsISelectionDisplay::DISPLAY_TEXT) ||
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      selectionStatus < nsISelectionController::SELECTION_ON) {
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    // Not displaying the normal selection.
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    // We're not caching this fact, so every call to GetSelectionColors
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    // will come through here. We could avoid this, but it's not really worth
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    // it.
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    return false;
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  }
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  mInitSelectionColorsAndShadow = true;
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  // Use ::selection pseudo class if applicable.
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  if (RefPtr<ComputedStyle> style =
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          mFrame->ComputeSelectionStyle(selectionStatus)) {
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    mSelectionBGColor =
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        style->GetVisitedDependentColor(&nsStyleBackground::mBackgroundColor);
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    mSelectionTextColor =
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        style->GetVisitedDependentColor(&nsStyleText::mWebkitTextFillColor);
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    mSelectionPseudoStyle = std::move(style);
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    return true;
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  }
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  mSelectionTextColor =
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      LookAndFeel::Color(LookAndFeel::ColorID::Highlighttext, mFrame);
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  nscolor selectionBGColor =
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      LookAndFeel::Color(LookAndFeel::ColorID::Highlight, mFrame);
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  switch (selectionStatus) {
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    case nsISelectionController::SELECTION_ATTENTION: {
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      mSelectionTextColor = LookAndFeel::Color(
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          LookAndFeel::ColorID::TextSelectAttentionForeground, mFrame);
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      mSelectionBGColor = LookAndFeel::Color(
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          LookAndFeel::ColorID::TextSelectAttentionBackground, mFrame);
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      mSelectionBGColor =
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          EnsureDifferentColors(mSelectionBGColor, selectionBGColor);
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      break;
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    }
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    case nsISelectionController::SELECTION_ON: {
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      mSelectionBGColor = selectionBGColor;
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      break;
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    }
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    default: {
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						|
      mSelectionBGColor = LookAndFeel::Color(
 | 
						|
          LookAndFeel::ColorID::TextSelectDisabledBackground, mFrame);
 | 
						|
      mSelectionBGColor =
 | 
						|
          EnsureDifferentColors(mSelectionBGColor, selectionBGColor);
 | 
						|
      break;
 | 
						|
    }
 | 
						|
  }
 | 
						|
 | 
						|
  if (mResolveColors) {
 | 
						|
    EnsureSufficientContrast(&mSelectionTextColor, &mSelectionBGColor);
 | 
						|
  }
 | 
						|
  return true;
 | 
						|
}
 | 
						|
 | 
						|
nsTextPaintStyle::nsSelectionStyle* nsTextPaintStyle::SelectionStyle(
 | 
						|
    SelectionStyleIndex aIndex) {
 | 
						|
  Maybe<nsSelectionStyle>& selectionStyle = mSelectionStyle[aIndex];
 | 
						|
  if (!selectionStyle) {
 | 
						|
    selectionStyle.emplace(InitSelectionStyle(aIndex));
 | 
						|
  }
 | 
						|
  return selectionStyle.ptr();
 | 
						|
}
 | 
						|
 | 
						|
struct StyleIDs {
 | 
						|
  LookAndFeel::ColorID mForeground, mBackground, mLine;
 | 
						|
  LookAndFeel::IntID mLineStyle;
 | 
						|
  LookAndFeel::FloatID mLineRelativeSize;
 | 
						|
};
 | 
						|
EnumeratedArray<nsTextPaintStyle::SelectionStyleIndex, StyleIDs,
 | 
						|
                size_t(nsTextPaintStyle::SelectionStyleIndex::Count)>
 | 
						|
    SelectionStyleIDs = {
 | 
						|
        StyleIDs{LookAndFeel::ColorID::IMERawInputForeground,
 | 
						|
                 LookAndFeel::ColorID::IMERawInputBackground,
 | 
						|
                 LookAndFeel::ColorID::IMERawInputUnderline,
 | 
						|
                 LookAndFeel::IntID::IMERawInputUnderlineStyle,
 | 
						|
                 LookAndFeel::FloatID::IMEUnderlineRelativeSize},
 | 
						|
        StyleIDs{LookAndFeel::ColorID::IMESelectedRawTextForeground,
 | 
						|
                 LookAndFeel::ColorID::IMESelectedRawTextBackground,
 | 
						|
                 LookAndFeel::ColorID::IMESelectedRawTextUnderline,
 | 
						|
                 LookAndFeel::IntID::IMESelectedRawTextUnderlineStyle,
 | 
						|
                 LookAndFeel::FloatID::IMEUnderlineRelativeSize},
 | 
						|
        StyleIDs{LookAndFeel::ColorID::IMEConvertedTextForeground,
 | 
						|
                 LookAndFeel::ColorID::IMEConvertedTextBackground,
 | 
						|
                 LookAndFeel::ColorID::IMEConvertedTextUnderline,
 | 
						|
                 LookAndFeel::IntID::IMEConvertedTextUnderlineStyle,
 | 
						|
                 LookAndFeel::FloatID::IMEUnderlineRelativeSize},
 | 
						|
        StyleIDs{LookAndFeel::ColorID::IMESelectedConvertedTextForeground,
 | 
						|
                 LookAndFeel::ColorID::IMESelectedConvertedTextBackground,
 | 
						|
                 LookAndFeel::ColorID::IMESelectedConvertedTextUnderline,
 | 
						|
                 LookAndFeel::IntID::IMESelectedConvertedTextUnderline,
 | 
						|
                 LookAndFeel::FloatID::IMEUnderlineRelativeSize},
 | 
						|
        StyleIDs{LookAndFeel::ColorID::End, LookAndFeel::ColorID::End,
 | 
						|
                 LookAndFeel::ColorID::SpellCheckerUnderline,
 | 
						|
                 LookAndFeel::IntID::SpellCheckerUnderlineStyle,
 | 
						|
                 LookAndFeel::FloatID::SpellCheckerUnderlineRelativeSize}};
 | 
						|
 | 
						|
nsTextPaintStyle::nsSelectionStyle nsTextPaintStyle::InitSelectionStyle(
 | 
						|
    SelectionStyleIndex aIndex) {
 | 
						|
  const StyleIDs& styleIDs = SelectionStyleIDs[aIndex];
 | 
						|
 | 
						|
  nscolor foreColor, backColor;
 | 
						|
  if (styleIDs.mForeground == LookAndFeel::ColorID::End) {
 | 
						|
    foreColor = NS_SAME_AS_FOREGROUND_COLOR;
 | 
						|
  } else {
 | 
						|
    foreColor = LookAndFeel::Color(styleIDs.mForeground, mFrame);
 | 
						|
  }
 | 
						|
  if (styleIDs.mBackground == LookAndFeel::ColorID::End) {
 | 
						|
    backColor = NS_TRANSPARENT;
 | 
						|
  } else {
 | 
						|
    backColor = LookAndFeel::Color(styleIDs.mBackground, mFrame);
 | 
						|
  }
 | 
						|
 | 
						|
  // Convert special color to actual color
 | 
						|
  NS_ASSERTION(foreColor != NS_TRANSPARENT,
 | 
						|
               "foreColor cannot be NS_TRANSPARENT");
 | 
						|
  NS_ASSERTION(backColor != NS_SAME_AS_FOREGROUND_COLOR,
 | 
						|
               "backColor cannot be NS_SAME_AS_FOREGROUND_COLOR");
 | 
						|
  NS_ASSERTION(backColor != NS_40PERCENT_FOREGROUND_COLOR,
 | 
						|
               "backColor cannot be NS_40PERCENT_FOREGROUND_COLOR");
 | 
						|
 | 
						|
  if (mResolveColors) {
 | 
						|
    foreColor = GetResolvedForeColor(foreColor, GetTextColor(), backColor);
 | 
						|
 | 
						|
    if (NS_GET_A(backColor) > 0) {
 | 
						|
      EnsureSufficientContrast(&foreColor, &backColor);
 | 
						|
    }
 | 
						|
  }
 | 
						|
 | 
						|
  nscolor lineColor;
 | 
						|
  float relativeSize;
 | 
						|
  StyleTextDecorationStyle lineStyle;
 | 
						|
  GetSelectionUnderline(mFrame, aIndex, &lineColor, &relativeSize, &lineStyle);
 | 
						|
 | 
						|
  if (mResolveColors) {
 | 
						|
    lineColor = GetResolvedForeColor(lineColor, foreColor, backColor);
 | 
						|
  }
 | 
						|
 | 
						|
  return nsSelectionStyle{foreColor, backColor, lineColor, lineStyle,
 | 
						|
                          relativeSize};
 | 
						|
}
 | 
						|
 | 
						|
/* static */
 | 
						|
bool nsTextPaintStyle::GetSelectionUnderline(nsIFrame* aFrame,
 | 
						|
                                             SelectionStyleIndex aIndex,
 | 
						|
                                             nscolor* aLineColor,
 | 
						|
                                             float* aRelativeSize,
 | 
						|
                                             StyleTextDecorationStyle* aStyle) {
 | 
						|
  NS_ASSERTION(aFrame, "aFrame is null");
 | 
						|
  NS_ASSERTION(aRelativeSize, "aRelativeSize is null");
 | 
						|
  NS_ASSERTION(aStyle, "aStyle is null");
 | 
						|
 | 
						|
  const StyleIDs& styleIDs = SelectionStyleIDs[aIndex];
 | 
						|
 | 
						|
  nscolor color = LookAndFeel::Color(styleIDs.mLine, aFrame);
 | 
						|
  const int32_t lineStyle = LookAndFeel::GetInt(styleIDs.mLineStyle);
 | 
						|
  auto style = static_cast<StyleTextDecorationStyle>(lineStyle);
 | 
						|
  if (lineStyle > static_cast<int32_t>(StyleTextDecorationStyle::Sentinel)) {
 | 
						|
    NS_ERROR("Invalid underline style value is specified");
 | 
						|
    style = StyleTextDecorationStyle::Solid;
 | 
						|
  }
 | 
						|
  float size = LookAndFeel::GetFloat(styleIDs.mLineRelativeSize);
 | 
						|
 | 
						|
  NS_ASSERTION(size, "selection underline relative size must be larger than 0");
 | 
						|
 | 
						|
  if (aLineColor) {
 | 
						|
    *aLineColor = color;
 | 
						|
  }
 | 
						|
  *aRelativeSize = size;
 | 
						|
  *aStyle = style;
 | 
						|
 | 
						|
  return style != StyleTextDecorationStyle::None && color != NS_TRANSPARENT &&
 | 
						|
         size > 0.0f;
 | 
						|
}
 | 
						|
 | 
						|
bool nsTextPaintStyle::GetSelectionShadow(
 | 
						|
    Span<const StyleSimpleShadow>* aShadows) {
 | 
						|
  if (!InitSelectionColorsAndShadow()) {
 | 
						|
    return false;
 | 
						|
  }
 | 
						|
 | 
						|
  if (mSelectionPseudoStyle) {
 | 
						|
    *aShadows = mSelectionPseudoStyle->StyleText()->mTextShadow.AsSpan();
 | 
						|
    return true;
 | 
						|
  }
 | 
						|
 | 
						|
  return false;
 | 
						|
}
 | 
						|
 | 
						|
inline nscolor Get40PercentColor(nscolor aForeColor, nscolor aBackColor) {
 | 
						|
  nscolor foreColor = NS_RGBA(NS_GET_R(aForeColor), NS_GET_G(aForeColor),
 | 
						|
                              NS_GET_B(aForeColor), (uint8_t)(255 * 0.4f));
 | 
						|
  // Don't use true alpha color for readability.
 | 
						|
  return NS_ComposeColors(aBackColor, foreColor);
 | 
						|
}
 | 
						|
 | 
						|
nscolor nsTextPaintStyle::GetResolvedForeColor(nscolor aColor,
 | 
						|
                                               nscolor aDefaultForeColor,
 | 
						|
                                               nscolor aBackColor) {
 | 
						|
  if (aColor == NS_SAME_AS_FOREGROUND_COLOR) {
 | 
						|
    return aDefaultForeColor;
 | 
						|
  }
 | 
						|
 | 
						|
  if (aColor != NS_40PERCENT_FOREGROUND_COLOR) {
 | 
						|
    return aColor;
 | 
						|
  }
 | 
						|
 | 
						|
  // Get actual background color
 | 
						|
  nscolor actualBGColor = aBackColor;
 | 
						|
  if (actualBGColor == NS_TRANSPARENT) {
 | 
						|
    InitCommonColors();
 | 
						|
    actualBGColor = mFrameBackgroundColor;
 | 
						|
  }
 | 
						|
  return Get40PercentColor(aDefaultForeColor, actualBGColor);
 | 
						|
}
 | 
						|
 | 
						|
nscolor nsTextPaintStyle::GetWebkitTextStrokeColor() {
 | 
						|
  if (mFrame->IsInSVGTextSubtree()) {
 | 
						|
    return 0;
 | 
						|
  }
 | 
						|
  return mFrame->StyleText()->mWebkitTextStrokeColor.CalcColor(mFrame);
 | 
						|
}
 | 
						|
 | 
						|
float nsTextPaintStyle::GetWebkitTextStrokeWidth() {
 | 
						|
  if (mFrame->IsInSVGTextSubtree()) {
 | 
						|
    return 0.0f;
 | 
						|
  }
 | 
						|
  nscoord coord = mFrame->StyleText()->mWebkitTextStrokeWidth;
 | 
						|
  return mFrame->PresContext()->AppUnitsToFloatDevPixels(coord);
 | 
						|
}
 |