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/*
* Copyright (C) 2013 Google Inc. All rights reserved.
* Copyright (C) 2014 Apple Inc. All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY APPLE INC. AND ITS CONTRIBUTORS ``AS IS''
* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
* THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE INC. OR ITS CONTRIBUTORS
* BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF
* THE POSSIBILITY OF SUCH DAMAGE.
*/
#pragma once
#include "BasicShapeFunctions.h"
#include "CSSCalculationValue.h"
#include "CSSContentDistributionValue.h"
#include "CSSFontFeatureValue.h"
#include "CSSFontStyleValue.h"
#include "CSSFontVariationValue.h"
#include "CSSFunctionValue.h"
#include "CSSGridAutoRepeatValue.h"
#include "CSSGridIntegerRepeatValue.h"
#include "CSSGridLineNamesValue.h"
#include "CSSImageGeneratorValue.h"
#include "CSSImageSetValue.h"
#include "CSSImageValue.h"
#include "CSSPrimitiveValue.h"
#include "CSSPrimitiveValueMappings.h"
#include "CSSReflectValue.h"
#include "FontSelectionValueInlines.h"
#include "Frame.h"
#include "GridPositionsResolver.h"
#include "Length.h"
#include "Pair.h"
#include "QuotesData.h"
#include "RuntimeEnabledFeatures.h"
#include "SVGURIReference.h"
#include "Settings.h"
#include "StyleBuilderState.h"
#include "StyleScrollSnapPoints.h"
#include "TabSize.h"
#include "TouchAction.h"
#include "TransformFunctions.h"
#include <wtf/Optional.h>
namespace WebCore {
namespace Style {
// Note that we assume the CSS parser only allows valid CSSValue types.
class BuilderConverter {
public:
static Length convertLength(const BuilderState&, const CSSValue&);
static Length convertLengthOrAuto(const BuilderState&, const CSSValue&);
static Length convertLengthSizing(const BuilderState&, const CSSValue&);
static Length convertLengthMaxSizing(const BuilderState&, const CSSValue&);
static TabSize convertTabSize(const BuilderState&, const CSSValue&);
template<typename T> static T convertComputedLength(BuilderState&, const CSSValue&);
template<typename T> static T convertLineWidth(BuilderState&, const CSSValue&);
static float convertSpacing(BuilderState&, const CSSValue&);
static LengthSize convertRadius(BuilderState&, const CSSValue&);
static LengthPoint convertObjectPosition(BuilderState&, const CSSValue&);
static OptionSet<TextDecoration> convertTextDecoration(BuilderState&, const CSSValue&);
template<typename T> static T convertNumber(BuilderState&, const CSSValue&);
template<typename T> static T convertNumberOrAuto(BuilderState&, const CSSValue&);
static short convertWebkitHyphenateLimitLines(BuilderState&, const CSSValue&);
template<CSSPropertyID> static NinePieceImage convertBorderImage(BuilderState&, CSSValue&);
template<CSSPropertyID> static NinePieceImage convertBorderMask(BuilderState&, CSSValue&);
template<CSSPropertyID> static RefPtr<StyleImage> convertStyleImage(BuilderState&, CSSValue&);
static TransformOperations convertTransform(BuilderState&, const CSSValue&);
#if ENABLE(DARK_MODE_CSS)
static StyleColorScheme convertColorScheme(BuilderState&, const CSSValue&);
#endif
static String convertString(BuilderState&, const CSSValue&);
static String convertStringOrAuto(BuilderState&, const CSSValue&);
static String convertStringOrNone(BuilderState&, const CSSValue&);
static OptionSet<TextEmphasisPosition> convertTextEmphasisPosition(BuilderState&, const CSSValue&);
static TextAlignMode convertTextAlign(BuilderState&, const CSSValue&);
static RefPtr<ClipPathOperation> convertClipPath(BuilderState&, const CSSValue&);
static Resize convertResize(BuilderState&, const CSSValue&);
static int convertMarqueeRepetition(BuilderState&, const CSSValue&);
static int convertMarqueeSpeed(BuilderState&, const CSSValue&);
static Ref<QuotesData> convertQuotes(BuilderState&, const CSSValue&);
static TextUnderlinePosition convertTextUnderlinePosition(BuilderState&, const CSSValue&);
static TextUnderlineOffset convertTextUnderlineOffset(BuilderState&, const CSSValue&);
static TextDecorationThickness convertTextDecorationThickness(BuilderState&, const CSSValue&);
static RefPtr<StyleReflection> convertReflection(BuilderState&, const CSSValue&);
static IntSize convertInitialLetter(BuilderState&, const CSSValue&);
static float convertTextStrokeWidth(BuilderState&, const CSSValue&);
static OptionSet<LineBoxContain> convertLineBoxContain(BuilderState&, const CSSValue&);
static OptionSet<TextDecorationSkip> convertTextDecorationSkip(BuilderState&, const CSSValue&);
static RefPtr<ShapeValue> convertShapeValue(BuilderState&, CSSValue&);
#if ENABLE(CSS_SCROLL_SNAP)
static ScrollSnapType convertScrollSnapType(BuilderState&, const CSSValue&);
static ScrollSnapAlign convertScrollSnapAlign(BuilderState&, const CSSValue&);
#endif
static GridTrackSize convertGridTrackSize(BuilderState&, const CSSValue&);
static Vector<GridTrackSize> convertGridTrackSizeList(BuilderState&, const CSSValue&);
static Optional<GridPosition> convertGridPosition(BuilderState&, const CSSValue&);
static GridAutoFlow convertGridAutoFlow(BuilderState&, const CSSValue&);
static Optional<Length> convertWordSpacing(BuilderState&, const CSSValue&);
static Optional<float> convertPerspective(BuilderState&, const CSSValue&);
static Optional<Length> convertMarqueeIncrement(BuilderState&, const CSSValue&);
static Optional<FilterOperations> convertFilterOperations(BuilderState&, const CSSValue&);
#if PLATFORM(IOS_FAMILY)
static bool convertTouchCallout(BuilderState&, const CSSValue&);
#endif
#if ENABLE(TOUCH_EVENTS)
static Color convertTapHighlightColor(BuilderState&, const CSSValue&);
#endif
#if ENABLE(POINTER_EVENTS)
static OptionSet<TouchAction> convertTouchAction(BuilderState&, const CSSValue&);
#endif
#if ENABLE(OVERFLOW_SCROLLING_TOUCH)
static bool convertOverflowScrolling(BuilderState&, const CSSValue&);
#endif
static FontFeatureSettings convertFontFeatureSettings(BuilderState&, const CSSValue&);
static FontSelectionValue convertFontWeightFromValue(const CSSValue&);
static FontSelectionValue convertFontStretchFromValue(const CSSValue&);
static Optional<FontSelectionValue> convertFontStyleFromValue(const CSSValue&);
static FontSelectionValue convertFontWeight(BuilderState&, const CSSValue&);
static FontSelectionValue convertFontStretch(BuilderState&, const CSSValue&);
static FontSelectionValue convertFontStyle(BuilderState&, const CSSValue&);
#if ENABLE(VARIATION_FONTS)
static FontVariationSettings convertFontVariationSettings(BuilderState&, const CSSValue&);
#endif
static SVGLengthValue convertSVGLengthValue(BuilderState&, const CSSValue&);
static Vector<SVGLengthValue> convertSVGLengthVector(BuilderState&, const CSSValue&);
static Vector<SVGLengthValue> convertStrokeDashArray(BuilderState&, const CSSValue&);
static PaintOrder convertPaintOrder(BuilderState&, const CSSValue&);
static float convertOpacity(BuilderState&, const CSSValue&);
static String convertSVGURIReference(BuilderState&, const CSSValue&);
static Color convertSVGColor(BuilderState&, const CSSValue&);
static StyleSelfAlignmentData convertSelfOrDefaultAlignmentData(BuilderState&, const CSSValue&);
static StyleContentAlignmentData convertContentAlignmentData(BuilderState&, const CSSValue&);
static GlyphOrientation convertGlyphOrientation(BuilderState&, const CSSValue&);
static GlyphOrientation convertGlyphOrientationOrAuto(BuilderState&, const CSSValue&);
static Optional<Length> convertLineHeight(BuilderState&, const CSSValue&, float multiplier = 1.f);
static FontSynthesis convertFontSynthesis(BuilderState&, const CSSValue&);
static BreakBetween convertPageBreakBetween(BuilderState&, const CSSValue&);
static BreakInside convertPageBreakInside(BuilderState&, const CSSValue&);
static BreakBetween convertColumnBreakBetween(BuilderState&, const CSSValue&);
static BreakInside convertColumnBreakInside(BuilderState&, const CSSValue&);
static OptionSet<HangingPunctuation> convertHangingPunctuation(BuilderState&, const CSSValue&);
static OptionSet<SpeakAs> convertSpeakAs(BuilderState&, const CSSValue&);
static Length convertPositionComponentX(BuilderState&, const CSSValue&);
static Length convertPositionComponentY(BuilderState&, const CSSValue&);
static GapLength convertGapLength(BuilderState&, const CSSValue&);
private:
friend class BuilderCustom;
static Length convertToRadiusLength(CSSToLengthConversionData&, const CSSPrimitiveValue&);
static OptionSet<TextEmphasisPosition> valueToEmphasisPosition(const CSSPrimitiveValue&);
static OptionSet<TextDecorationSkip> valueToDecorationSkip(const CSSPrimitiveValue&);
#if ENABLE(CSS_SCROLL_SNAP)
static Length parseSnapCoordinate(BuilderState&, const CSSValue&);
#endif
#if ENABLE(DARK_MODE_CSS)
static void updateColorScheme(const CSSPrimitiveValue&, StyleColorScheme&);
#endif
static Length convertTo100PercentMinusLength(const Length&);
template<CSSValueID, CSSValueID> static Length convertPositionComponent(BuilderState&, const CSSPrimitiveValue&);
static GridLength createGridTrackBreadth(const CSSPrimitiveValue&, BuilderState&);
static GridTrackSize createGridTrackSize(const CSSValue&, BuilderState&);
struct TracksData;
static bool createGridTrackList(const CSSValue&, TracksData&, BuilderState&);
static bool createGridPosition(const CSSValue&, GridPosition&);
static void createImplicitNamedGridLinesFromGridArea(const NamedGridAreaMap&, NamedGridLinesMap&, GridTrackSizingDirection);
static CSSToLengthConversionData csstoLengthConversionDataWithTextZoomFactor(BuilderState&);
};
inline Length BuilderConverter::convertLength(const BuilderState& builderState, const CSSValue& value)
{
auto& primitiveValue = downcast<CSSPrimitiveValue>(value);
CSSToLengthConversionData conversionData = builderState.useSVGZoomRulesForLength() ?
builderState.cssToLengthConversionData().copyWithAdjustedZoom(1.0f)
: builderState.cssToLengthConversionData();
if (primitiveValue.isLength()) {
Length length = primitiveValue.computeLength<Length>(conversionData);
length.setHasQuirk(primitiveValue.isQuirkValue());
return length;
}
if (primitiveValue.isPercentage())
return Length(primitiveValue.doubleValue(), Percent);
if (primitiveValue.isCalculatedPercentageWithLength())
return Length(primitiveValue.cssCalcValue()->createCalculationValue(conversionData));
ASSERT_NOT_REACHED();
return Length(0, Fixed);
}
inline Length BuilderConverter::convertLengthOrAuto(const BuilderState& builderState, const CSSValue& value)
{
if (downcast<CSSPrimitiveValue>(value).valueID() == CSSValueAuto)
return Length(Auto);
return convertLength(builderState, value);
}
inline Length BuilderConverter::convertLengthSizing(const BuilderState& builderState, const CSSValue& value)
{
auto& primitiveValue = downcast<CSSPrimitiveValue>(value);
switch (primitiveValue.valueID()) {
case CSSValueInvalid:
return convertLength(builderState, value);
case CSSValueIntrinsic:
return Length(Intrinsic);
case CSSValueMinIntrinsic:
return Length(MinIntrinsic);
case CSSValueMinContent:
case CSSValueWebkitMinContent:
return Length(MinContent);
case CSSValueMaxContent:
case CSSValueWebkitMaxContent:
return Length(MaxContent);
case CSSValueWebkitFillAvailable:
return Length(FillAvailable);
case CSSValueFitContent:
case CSSValueWebkitFitContent:
return Length(FitContent);
case CSSValueAuto:
return Length(Auto);
default:
ASSERT_NOT_REACHED();
return Length();
}
}
inline Length BuilderConverter::convertLengthMaxSizing(const BuilderState& builderState, const CSSValue& value)
{
if (downcast<CSSPrimitiveValue>(value).valueID() == CSSValueNone)
return Length(Undefined);
return convertLengthSizing(builderState, value);
}
inline TabSize BuilderConverter::convertTabSize(const BuilderState& builderState, const CSSValue& value)
{
auto& primitiveValue = downcast<CSSPrimitiveValue>(value);
if (primitiveValue.isNumber())
return TabSize(primitiveValue.floatValue(), SpaceValueType);
return TabSize(primitiveValue.computeLength<float>(builderState.cssToLengthConversionData()), LengthValueType);
}
template<typename T>
inline T BuilderConverter::convertComputedLength(BuilderState& builderState, const CSSValue& value)
{
return downcast<CSSPrimitiveValue>(value).computeLength<T>(builderState.cssToLengthConversionData());
}
template<typename T>
inline T BuilderConverter::convertLineWidth(BuilderState& builderState, const CSSValue& value)
{
auto& primitiveValue = downcast<CSSPrimitiveValue>(value);
switch (primitiveValue.valueID()) {
case CSSValueThin:
return 1;
case CSSValueMedium:
return 3;
case CSSValueThick:
return 5;
case CSSValueInvalid: {
// Any original result that was >= 1 should not be allowed to fall below 1.
// This keeps border lines from vanishing.
T result = convertComputedLength<T>(builderState, value);
if (builderState.style().effectiveZoom() < 1.0f && result < 1.0) {
T originalLength = primitiveValue.computeLength<T>(builderState.cssToLengthConversionData().copyWithAdjustedZoom(1.0));
if (originalLength >= 1.0)
return 1;
}
float minimumLineWidth = 1 / builderState.document().deviceScaleFactor();
if (result > 0 && result < minimumLineWidth)
return minimumLineWidth;
return floorToDevicePixel(result, builderState.document().deviceScaleFactor());
}
default:
ASSERT_NOT_REACHED();
return 0;
}
}
inline float BuilderConverter::convertSpacing(BuilderState& builderState, const CSSValue& value)
{
auto& primitiveValue = downcast<CSSPrimitiveValue>(value);
if (primitiveValue.valueID() == CSSValueNormal)
return 0.f;
CSSToLengthConversionData conversionData = builderState.useSVGZoomRulesForLength() ?
builderState.cssToLengthConversionData().copyWithAdjustedZoom(1.0f)
: builderState.cssToLengthConversionData();
return primitiveValue.computeLength<float>(conversionData);
}
inline Length BuilderConverter::convertToRadiusLength(CSSToLengthConversionData& conversionData, const CSSPrimitiveValue& value)
{
if (value.isPercentage())
return Length(value.doubleValue(), Percent);
if (value.isCalculatedPercentageWithLength())
return Length(value.cssCalcValue()->createCalculationValue(conversionData));
return value.computeLength<Length>(conversionData);
}
inline LengthSize BuilderConverter::convertRadius(BuilderState& builderState, const CSSValue& value)
{
auto* pair = downcast<CSSPrimitiveValue>(value).pairValue();
if (!pair || !pair->first() || !pair->second())
return { { 0, Fixed }, { 0, Fixed } };
CSSToLengthConversionData conversionData = builderState.cssToLengthConversionData();
LengthSize radius { convertToRadiusLength(conversionData, *pair->first()), convertToRadiusLength(conversionData, *pair->second()) };
ASSERT(!radius.width.isNegative());
ASSERT(!radius.height.isNegative());
if (radius.width.isZero() || radius.height.isZero())
return { { 0, Fixed }, { 0, Fixed } };
return radius;
}
inline Length BuilderConverter::convertTo100PercentMinusLength(const Length& length)
{
if (length.isPercent())
return Length(100 - length.value(), Percent);
// Turn this into a calc expression: calc(100% - length)
Vector<std::unique_ptr<CalcExpressionNode>> lengths;
lengths.reserveInitialCapacity(2);
lengths.uncheckedAppend(makeUnique<CalcExpressionLength>(Length(100, Percent)));
lengths.uncheckedAppend(makeUnique<CalcExpressionLength>(length));
auto op = makeUnique<CalcExpressionOperation>(WTFMove(lengths), CalcOperator::Subtract);
return Length(CalculationValue::create(WTFMove(op), ValueRangeAll));
}
inline Length BuilderConverter::convertPositionComponentX(BuilderState& builderState, const CSSValue& value)
{
return convertPositionComponent<CSSValueLeft, CSSValueRight>(builderState, downcast<CSSPrimitiveValue>(value));
}
inline Length BuilderConverter::convertPositionComponentY(BuilderState& builderState, const CSSValue& value)
{
return convertPositionComponent<CSSValueTop, CSSValueBottom>(builderState, downcast<CSSPrimitiveValue>(value));
}
template<CSSValueID cssValueFor0, CSSValueID cssValueFor100>
inline Length BuilderConverter::convertPositionComponent(BuilderState& builderState, const CSSPrimitiveValue& value)
{
Length length;
auto* lengthValue = &value;
bool relativeToTrailingEdge = false;
if (value.isPair()) {
auto& first = *value.pairValue()->first();
if (first.valueID() == CSSValueRight || first.valueID() == CSSValueBottom)
relativeToTrailingEdge = true;
lengthValue = value.pairValue()->second();
}
if (value.isValueID()) {
switch (value.valueID()) {
case cssValueFor0:
return Length(0, Percent);
case cssValueFor100:
return Length(100, Percent);
case CSSValueCenter:
return Length(50, Percent);
default:
ASSERT_NOT_REACHED();
}
}
length = convertLength(builderState, *lengthValue);
if (relativeToTrailingEdge)
length = convertTo100PercentMinusLength(length);
return length;
}
inline LengthPoint BuilderConverter::convertObjectPosition(BuilderState& builderState, const CSSValue& value)
{
auto& primitiveValue = downcast<CSSPrimitiveValue>(value);
Pair* pair = primitiveValue.pairValue();
if (!pair || !pair->first() || !pair->second())
return RenderStyle::initialObjectPosition();
Length lengthX = convertPositionComponent<CSSValueLeft, CSSValueRight>(builderState, *pair->first());
Length lengthY = convertPositionComponent<CSSValueTop, CSSValueBottom>(builderState, *pair->second());
return LengthPoint(lengthX, lengthY);
}
inline OptionSet<TextDecoration> BuilderConverter::convertTextDecoration(BuilderState&, const CSSValue& value)
{
auto result = RenderStyle::initialTextDecoration();
if (is<CSSValueList>(value)) {
for (auto& currentValue : downcast<CSSValueList>(value))
result.add(downcast<CSSPrimitiveValue>(currentValue.get()));
}
return result;
}
template<typename T>
inline T BuilderConverter::convertNumber(BuilderState&, const CSSValue& value)
{
return downcast<CSSPrimitiveValue>(value).value<T>(CSSUnitType::CSS_NUMBER);
}
template<typename T>
inline T BuilderConverter::convertNumberOrAuto(BuilderState& builderState, const CSSValue& value)
{
if (downcast<CSSPrimitiveValue>(value).valueID() == CSSValueAuto)
return -1;
return convertNumber<T>(builderState, value);
}
inline short BuilderConverter::convertWebkitHyphenateLimitLines(BuilderState&, const CSSValue& value)
{
auto& primitiveValue = downcast<CSSPrimitiveValue>(value);
if (primitiveValue.valueID() == CSSValueNoLimit)
return -1;
return primitiveValue.value<short>(CSSUnitType::CSS_NUMBER);
}
template<CSSPropertyID property>
inline NinePieceImage BuilderConverter::convertBorderImage(BuilderState& builderState, CSSValue& value)
{
NinePieceImage image;
builderState.styleMap().mapNinePieceImage(property, &value, image);
return image;
}
template<CSSPropertyID property>
inline NinePieceImage BuilderConverter::convertBorderMask(BuilderState& builderState, CSSValue& value)
{
NinePieceImage image(NinePieceImage::Type::Mask);
builderState.styleMap().mapNinePieceImage(property, &value, image);
return image;
}
template<CSSPropertyID>
inline RefPtr<StyleImage> BuilderConverter::convertStyleImage(BuilderState& builderState, CSSValue& value)
{
return builderState.createStyleImage(value);
}
inline TransformOperations BuilderConverter::convertTransform(BuilderState& builderState, const CSSValue& value)
{
TransformOperations operations;
transformsForValue(value, builderState.cssToLengthConversionData(), operations);
return operations;
}
#if ENABLE(DARK_MODE_CSS)
inline void BuilderConverter::updateColorScheme(const CSSPrimitiveValue& primitiveValue, StyleColorScheme& colorScheme)
{
ASSERT(primitiveValue.isValueID());
switch (primitiveValue.valueID()) {
case CSSValueAuto:
colorScheme = StyleColorScheme();
break;
case CSSValueOnly:
colorScheme.setAllowsTransformations(false);
break;
case CSSValueLight:
colorScheme.add(ColorScheme::Light);
break;
case CSSValueDark:
colorScheme.add(ColorScheme::Dark);
break;
default:
// Unknown identifiers are allowed and ignored.
break;
}
}
inline StyleColorScheme BuilderConverter::convertColorScheme(BuilderState&, const CSSValue& value)
{
StyleColorScheme colorScheme;
if (is<CSSValueList>(value)) {
for (auto& currentValue : downcast<CSSValueList>(value))
updateColorScheme(downcast<CSSPrimitiveValue>(currentValue.get()), colorScheme);
} else if (is<CSSPrimitiveValue>(value))
updateColorScheme(downcast<CSSPrimitiveValue>(value), colorScheme);
// If the value was just "only", that is synonymous for "only light".
if (colorScheme.isOnly())
colorScheme.add(ColorScheme::Light);
return colorScheme;
}
#endif
inline String BuilderConverter::convertString(BuilderState&, const CSSValue& value)
{
return downcast<CSSPrimitiveValue>(value).stringValue();
}
inline String BuilderConverter::convertStringOrAuto(BuilderState& builderState, const CSSValue& value)
{
if (downcast<CSSPrimitiveValue>(value).valueID() == CSSValueAuto)
return nullAtom();
return convertString(builderState, value);
}
inline String BuilderConverter::convertStringOrNone(BuilderState& builderState, const CSSValue& value)
{
if (downcast<CSSPrimitiveValue>(value).valueID() == CSSValueNone)
return nullAtom();
return convertString(builderState, value);
}
inline OptionSet<TextEmphasisPosition> BuilderConverter::valueToEmphasisPosition(const CSSPrimitiveValue& primitiveValue)
{
ASSERT(primitiveValue.isValueID());
switch (primitiveValue.valueID()) {
case CSSValueOver:
return TextEmphasisPosition::Over;
case CSSValueUnder:
return TextEmphasisPosition::Under;
case CSSValueLeft:
return TextEmphasisPosition::Left;
case CSSValueRight:
return TextEmphasisPosition::Right;
default:
break;
}
ASSERT_NOT_REACHED();
return RenderStyle::initialTextEmphasisPosition();
}
inline OptionSet<TextEmphasisPosition> BuilderConverter::convertTextEmphasisPosition(BuilderState&, const CSSValue& value)
{
if (is<CSSPrimitiveValue>(value))
return valueToEmphasisPosition(downcast<CSSPrimitiveValue>(value));
OptionSet<TextEmphasisPosition> position;
for (auto& currentValue : downcast<CSSValueList>(value))
position.add(valueToEmphasisPosition(downcast<CSSPrimitiveValue>(currentValue.get())));
return position;
}
inline TextAlignMode BuilderConverter::convertTextAlign(BuilderState& builderState, const CSSValue& value)
{
auto& primitiveValue = downcast<CSSPrimitiveValue>(value);
ASSERT(primitiveValue.isValueID());
if (primitiveValue.valueID() != CSSValueWebkitMatchParent)
return primitiveValue;
auto& parentStyle = builderState.parentStyle();
if (parentStyle.textAlign() == TextAlignMode::Start)
return parentStyle.isLeftToRightDirection() ? TextAlignMode::Left : TextAlignMode::Right;
if (parentStyle.textAlign() == TextAlignMode::End)
return parentStyle.isLeftToRightDirection() ? TextAlignMode::Right : TextAlignMode::Left;
return parentStyle.textAlign();
}
inline RefPtr<ClipPathOperation> BuilderConverter::convertClipPath(BuilderState& builderState, const CSSValue& value)
{
if (is<CSSPrimitiveValue>(value)) {
auto& primitiveValue = downcast<CSSPrimitiveValue>(value);
if (primitiveValue.primitiveType() == CSSUnitType::CSS_URI) {
String cssURLValue = primitiveValue.stringValue();
String fragment = SVGURIReference::fragmentIdentifierFromIRIString(cssURLValue, builderState.document());
// FIXME: It doesn't work with external SVG references (see https://bugs.webkit.org/show_bug.cgi?id=126133)
return ReferenceClipPathOperation::create(cssURLValue, fragment);
}
ASSERT(primitiveValue.valueID() == CSSValueNone);
return nullptr;
}
CSSBoxType referenceBox = CSSBoxType::BoxMissing;
RefPtr<ClipPathOperation> operation;
for (auto& currentValue : downcast<CSSValueList>(value)) {
auto& primitiveValue = downcast<CSSPrimitiveValue>(currentValue.get());
if (primitiveValue.isShape()) {
ASSERT(!operation);
operation = ShapeClipPathOperation::create(basicShapeForValue(builderState.cssToLengthConversionData(), *primitiveValue.shapeValue()));
} else {
ASSERT(primitiveValue.valueID() == CSSValueContentBox
|| primitiveValue.valueID() == CSSValueBorderBox
|| primitiveValue.valueID() == CSSValuePaddingBox
|| primitiveValue.valueID() == CSSValueMarginBox
|| primitiveValue.valueID() == CSSValueFillBox
|| primitiveValue.valueID() == CSSValueStrokeBox
|| primitiveValue.valueID() == CSSValueViewBox);
ASSERT(referenceBox == CSSBoxType::BoxMissing);
referenceBox = primitiveValue;
}
}
if (operation)
downcast<ShapeClipPathOperation>(*operation).setReferenceBox(referenceBox);
else {
ASSERT(referenceBox != CSSBoxType::BoxMissing);
operation = BoxClipPathOperation::create(referenceBox);
}
return operation;
}
inline Resize BuilderConverter::convertResize(BuilderState& builderState, const CSSValue& value)
{
auto& primitiveValue = downcast<CSSPrimitiveValue>(value);
Resize resize = Resize::None;
if (primitiveValue.valueID() == CSSValueAuto)
resize = builderState.document().settings().textAreasAreResizable() ? Resize::Both : Resize::None;
else
resize = primitiveValue;
return resize;
}
inline int BuilderConverter::convertMarqueeRepetition(BuilderState&, const CSSValue& value)
{
auto& primitiveValue = downcast<CSSPrimitiveValue>(value);
if (primitiveValue.valueID() == CSSValueInfinite)
return -1; // -1 means repeat forever.
ASSERT(primitiveValue.isNumber());
return primitiveValue.intValue();
}
inline int BuilderConverter::convertMarqueeSpeed(BuilderState&, const CSSValue& value)
{
auto& primitiveValue = downcast<CSSPrimitiveValue>(value);
int speed = 85;
if (CSSValueID ident = primitiveValue.valueID()) {
switch (ident) {
case CSSValueSlow:
speed = 500; // 500 msec.
break;
case CSSValueNormal:
speed = 85; // 85msec. The WinIE default.
break;
case CSSValueFast:
speed = 10; // 10msec. Super fast.
break;
default:
ASSERT_NOT_REACHED();
break;
}
} else if (primitiveValue.isTime())
speed = primitiveValue.computeTime<int, CSSPrimitiveValue::Milliseconds>();
else {
// For scrollamount support.
ASSERT(primitiveValue.isNumber());
speed = primitiveValue.intValue();
}
return speed;
}
inline Ref<QuotesData> BuilderConverter::convertQuotes(BuilderState&, const CSSValue& value)
{
if (is<CSSPrimitiveValue>(value)) {
ASSERT(downcast<CSSPrimitiveValue>(value).valueID() == CSSValueNone);
return QuotesData::create(Vector<std::pair<String, String>>());
}
auto& list = downcast<CSSValueList>(value);
Vector<std::pair<String, String>> quotes;
quotes.reserveInitialCapacity(list.length() / 2);
for (unsigned i = 0; i < list.length(); i += 2) {
const CSSValue* first = list.itemWithoutBoundsCheck(i);
// item() returns null if out of bounds so this is safe.
const CSSValue* second = list.item(i + 1);
if (!second)
break;
String startQuote = downcast<CSSPrimitiveValue>(*first).stringValue();
String endQuote = downcast<CSSPrimitiveValue>(*second).stringValue();
quotes.append(std::make_pair(startQuote, endQuote));
}
return QuotesData::create(quotes);
}
inline TextUnderlinePosition BuilderConverter::convertTextUnderlinePosition(BuilderState&, const CSSValue& value)
{
ASSERT(is<CSSPrimitiveValue>(value));
return downcast<CSSPrimitiveValue>(value);
}
inline TextUnderlineOffset BuilderConverter::convertTextUnderlineOffset(BuilderState& builderState, const CSSValue& value)
{
ASSERT(is<CSSPrimitiveValue>(value));
auto& primitiveValue = downcast<CSSPrimitiveValue>(value);
switch (primitiveValue.valueID()) {
case CSSValueAuto:
return TextUnderlineOffset::createWithAuto();
default:
ASSERT(primitiveValue.isLength());
auto computedLength = convertComputedLength<float>(builderState, primitiveValue);
return TextUnderlineOffset::createWithLength(computedLength);
}
}
inline TextDecorationThickness BuilderConverter::convertTextDecorationThickness(BuilderState& builderState, const CSSValue& value)
{
ASSERT(is<CSSPrimitiveValue>(value));
auto& primitiveValue = downcast<CSSPrimitiveValue>(value);
switch (primitiveValue.valueID()) {
case CSSValueAuto:
return TextDecorationThickness::createWithAuto();
case CSSValueFromFont:
return TextDecorationThickness::createFromFont();
default:
ASSERT(primitiveValue.isLength());
auto computedLength = convertComputedLength<float>(builderState, primitiveValue);
return TextDecorationThickness::createWithLength(computedLength);
}
}
inline RefPtr<StyleReflection> BuilderConverter::convertReflection(BuilderState& builderState, const CSSValue& value)
{
if (is<CSSPrimitiveValue>(value)) {
ASSERT(downcast<CSSPrimitiveValue>(value).valueID() == CSSValueNone);
return nullptr;
}
auto& reflectValue = downcast<CSSReflectValue>(value);
auto reflection = StyleReflection::create();
reflection->setDirection(reflectValue.direction());
reflection->setOffset(reflectValue.offset().convertToLength<FixedIntegerConversion | PercentConversion | CalculatedConversion>(builderState.cssToLengthConversionData()));
NinePieceImage mask(NinePieceImage::Type::Mask);
builderState.styleMap().mapNinePieceImage(CSSPropertyWebkitBoxReflect, reflectValue.mask(), mask);
reflection->setMask(mask);
return reflection;
}
inline IntSize BuilderConverter::convertInitialLetter(BuilderState&, const CSSValue& value)
{
auto& primitiveValue = downcast<CSSPrimitiveValue>(value);
if (primitiveValue.valueID() == CSSValueNormal)
return IntSize();
Pair* pair = primitiveValue.pairValue();
ASSERT(pair);
ASSERT(pair->first());
ASSERT(pair->second());
return IntSize(pair->first()->intValue(), pair->second()->intValue());
}
inline float BuilderConverter::convertTextStrokeWidth(BuilderState& builderState, const CSSValue& value)
{
auto& primitiveValue = downcast<CSSPrimitiveValue>(value);
float width = 0;
switch (primitiveValue.valueID()) {
case CSSValueThin:
case CSSValueMedium:
case CSSValueThick: {
double result = 1.0 / 48;
if (primitiveValue.valueID() == CSSValueMedium)
result *= 3;
else if (primitiveValue.valueID() == CSSValueThick)
result *= 5;
Ref<CSSPrimitiveValue> emsValue(CSSPrimitiveValue::create(result, CSSUnitType::CSS_EMS));
width = convertComputedLength<float>(builderState, emsValue);
break;
}
case CSSValueInvalid: {
width = convertComputedLength<float>(builderState, primitiveValue);
break;
}
default:
ASSERT_NOT_REACHED();
return 0;
}
return width;
}
inline OptionSet<LineBoxContain> BuilderConverter::convertLineBoxContain(BuilderState&, const CSSValue& value)
{
if (is<CSSPrimitiveValue>(value)) {
ASSERT(downcast<CSSPrimitiveValue>(value).valueID() == CSSValueNone);
return { };
}
return downcast<CSSLineBoxContainValue>(value).value();
}
inline OptionSet<TextDecorationSkip> BuilderConverter::valueToDecorationSkip(const CSSPrimitiveValue& primitiveValue)
{
ASSERT(primitiveValue.isValueID());
switch (primitiveValue.valueID()) {
case CSSValueAuto:
return TextDecorationSkip::Auto;
case CSSValueNone:
return OptionSet<TextDecorationSkip> { };
case CSSValueInk:
return TextDecorationSkip::Ink;
case CSSValueObjects:
return TextDecorationSkip::Objects;
default:
break;
}
ASSERT_NOT_REACHED();
return OptionSet<TextDecorationSkip> { };
}
inline OptionSet<TextDecorationSkip> BuilderConverter::convertTextDecorationSkip(BuilderState&, const CSSValue& value)
{
if (is<CSSPrimitiveValue>(value))
return valueToDecorationSkip(downcast<CSSPrimitiveValue>(value));
OptionSet<TextDecorationSkip> skip;
for (auto& currentValue : downcast<CSSValueList>(value))
skip.add(valueToDecorationSkip(downcast<CSSPrimitiveValue>(currentValue.get())));
return skip;
}
static inline bool isImageShape(const CSSValue& value)
{
return is<CSSImageValue>(value) || is<CSSImageSetValue>(value) || is<CSSImageGeneratorValue>(value);
}
inline RefPtr<ShapeValue> BuilderConverter::convertShapeValue(BuilderState& builderState, CSSValue& value)
{
if (is<CSSPrimitiveValue>(value)) {
ASSERT(downcast<CSSPrimitiveValue>(value).valueID() == CSSValueNone);
return nullptr;
}
if (isImageShape(value))
return ShapeValue::create(builderState.createStyleImage(value).releaseNonNull());
RefPtr<BasicShape> shape;
CSSBoxType referenceBox = CSSBoxType::BoxMissing;
for (auto& currentValue : downcast<CSSValueList>(value)) {
auto& primitiveValue = downcast<CSSPrimitiveValue>(currentValue.get());
if (primitiveValue.isShape())
shape = basicShapeForValue(builderState.cssToLengthConversionData(), *primitiveValue.shapeValue());
else if (primitiveValue.valueID() == CSSValueContentBox
|| primitiveValue.valueID() == CSSValueBorderBox
|| primitiveValue.valueID() == CSSValuePaddingBox
|| primitiveValue.valueID() == CSSValueMarginBox)
referenceBox = primitiveValue;
else {
ASSERT_NOT_REACHED();
return nullptr;
}
}
if (shape)
return ShapeValue::create(shape.releaseNonNull(), referenceBox);
if (referenceBox != CSSBoxType::BoxMissing)
return ShapeValue::create(referenceBox);
ASSERT_NOT_REACHED();
return nullptr;
}
#if ENABLE(CSS_SCROLL_SNAP)
inline ScrollSnapType BuilderConverter::convertScrollSnapType(BuilderState&, const CSSValue& value)
{
ScrollSnapType type;
auto& values = downcast<CSSValueList>(value);
auto& firstValue = downcast<CSSPrimitiveValue>(*values.item(0));
if (values.length() == 2) {
type.axis = firstValue;
type.strictness = downcast<CSSPrimitiveValue>(*values.item(1));
return type;
}
switch (firstValue.valueID()) {
case CSSValueNone:
case CSSValueMandatory:
case CSSValueProximity:
type.strictness = firstValue;
break;
default:
type.axis = firstValue;
type.strictness = ScrollSnapStrictness::Proximity;
break;
}
return type;
}
inline ScrollSnapAlign BuilderConverter::convertScrollSnapAlign(BuilderState&, const CSSValue& value)
{
auto& values = downcast<CSSValueList>(value);
ScrollSnapAlign alignment;
alignment.x = downcast<CSSPrimitiveValue>(*values.item(0));
if (values.length() == 1)
alignment.y = alignment.x;
else
alignment.y = downcast<CSSPrimitiveValue>(*values.item(1));
return alignment;
}
#endif
inline GridLength BuilderConverter::createGridTrackBreadth(const CSSPrimitiveValue& primitiveValue, BuilderState& builderState)
{
if (primitiveValue.valueID() == CSSValueMinContent || primitiveValue.valueID() == CSSValueWebkitMinContent)
return Length(MinContent);
if (primitiveValue.valueID() == CSSValueMaxContent || primitiveValue.valueID() == CSSValueWebkitMaxContent)
return Length(MaxContent);
// Fractional unit.
if (primitiveValue.isFlex())
return GridLength(primitiveValue.doubleValue());
return primitiveValue.convertToLength<FixedIntegerConversion | PercentConversion | CalculatedConversion | AutoConversion>(builderState.cssToLengthConversionData());
}
inline GridTrackSize BuilderConverter::createGridTrackSize(const CSSValue& value, BuilderState& builderState)
{
if (is<CSSPrimitiveValue>(value))
return GridTrackSize(createGridTrackBreadth(downcast<CSSPrimitiveValue>(value), builderState));
ASSERT(is<CSSFunctionValue>(value));
const auto& function = downcast<CSSFunctionValue>(value);
if (function.length() == 1)
return GridTrackSize(createGridTrackBreadth(downcast<CSSPrimitiveValue>(*function.itemWithoutBoundsCheck(0)), builderState), FitContentTrackSizing);
RELEASE_ASSERT_WITH_SECURITY_IMPLICATION(function.length() == 2);
GridLength minTrackBreadth(createGridTrackBreadth(downcast<CSSPrimitiveValue>(*function.itemWithoutBoundsCheck(0)), builderState));
GridLength maxTrackBreadth(createGridTrackBreadth(downcast<CSSPrimitiveValue>(*function.itemWithoutBoundsCheck(1)), builderState));
return GridTrackSize(minTrackBreadth, maxTrackBreadth);
}
static void createGridLineNamesList(const CSSValue& value, unsigned currentNamedGridLine, NamedGridLinesMap& namedGridLines, OrderedNamedGridLinesMap& orderedNamedGridLines)
{
ASSERT(value.isGridLineNamesValue());
for (auto& namedGridLineValue : downcast<CSSGridLineNamesValue>(value)) {
String namedGridLine = downcast<CSSPrimitiveValue>(namedGridLineValue.get()).stringValue();
auto result = namedGridLines.add(namedGridLine, Vector<unsigned>());
result.iterator->value.append(currentNamedGridLine);
auto orderedResult = orderedNamedGridLines.add(currentNamedGridLine, Vector<String>());
orderedResult.iterator->value.append(namedGridLine);
}
}
struct BuilderConverter::TracksData {
WTF_MAKE_NONCOPYABLE(TracksData); WTF_MAKE_FAST_ALLOCATED;
public:
TracksData() = default;
Vector<GridTrackSize> m_trackSizes;
NamedGridLinesMap m_namedGridLines;
OrderedNamedGridLinesMap m_orderedNamedGridLines;
Vector<GridTrackSize> m_autoRepeatTrackSizes;
NamedGridLinesMap m_autoRepeatNamedGridLines;
OrderedNamedGridLinesMap m_autoRepeatOrderedNamedGridLines;
unsigned m_autoRepeatInsertionPoint { RenderStyle::initialGridAutoRepeatInsertionPoint() };
AutoRepeatType m_autoRepeatType { RenderStyle::initialGridAutoRepeatType() };
};
inline bool BuilderConverter::createGridTrackList(const CSSValue& value, TracksData& tracksData, BuilderState& builderState)
{
// Handle 'none'.
if (is<CSSPrimitiveValue>(value))
return downcast<CSSPrimitiveValue>(value).valueID() == CSSValueNone;
if (!is<CSSValueList>(value))
return false;
unsigned currentNamedGridLine = 0;
auto handleLineNameOrTrackSize = [&](const CSSValue& currentValue) {
if (is<CSSGridLineNamesValue>(currentValue))
createGridLineNamesList(currentValue, currentNamedGridLine, tracksData.m_namedGridLines, tracksData.m_orderedNamedGridLines);
else {
++currentNamedGridLine;
tracksData.m_trackSizes.append(createGridTrackSize(currentValue, builderState));
}
};
for (auto& currentValue : downcast<CSSValueList>(value)) {
if (is<CSSGridAutoRepeatValue>(currentValue)) {
ASSERT(tracksData.m_autoRepeatTrackSizes.isEmpty());
unsigned autoRepeatIndex = 0;
CSSValueID autoRepeatID = downcast<CSSGridAutoRepeatValue>(currentValue.get()).autoRepeatID();
ASSERT(autoRepeatID == CSSValueAutoFill || autoRepeatID == CSSValueAutoFit);
tracksData.m_autoRepeatType = autoRepeatID == CSSValueAutoFill ? AutoRepeatType::Fill : AutoRepeatType::Fit;
for (auto& autoRepeatValue : downcast<CSSValueList>(currentValue.get())) {
if (is<CSSGridLineNamesValue>(autoRepeatValue)) {
createGridLineNamesList(autoRepeatValue.get(), autoRepeatIndex, tracksData.m_autoRepeatNamedGridLines, tracksData.m_autoRepeatOrderedNamedGridLines);
continue;
}
++autoRepeatIndex;
tracksData.m_autoRepeatTrackSizes.append(createGridTrackSize(autoRepeatValue.get(), builderState));
}
tracksData.m_autoRepeatInsertionPoint = currentNamedGridLine++;
continue;
}
if (is<CSSGridIntegerRepeatValue>(currentValue)) {
size_t repetitions = downcast<CSSGridIntegerRepeatValue>(currentValue.get()).repetitions();
for (size_t i = 0; i < repetitions; ++i) {
for (auto& integerRepeatValue : downcast<CSSValueList>(currentValue.get()))
handleLineNameOrTrackSize(integerRepeatValue);
}
continue;
}
handleLineNameOrTrackSize(currentValue);
}
// The parser should have rejected any <track-list> without any <track-size> as
// this is not conformant to the syntax.
ASSERT(!tracksData.m_trackSizes.isEmpty() || !tracksData.m_autoRepeatTrackSizes.isEmpty());
return true;
}
inline bool BuilderConverter::createGridPosition(const CSSValue& value, GridPosition& position)
{
// We accept the specification's grammar:
// auto | <custom-ident> | [ <integer> && <custom-ident>? ] | [ span && [ <integer> || <custom-ident> ] ]
if (is<CSSPrimitiveValue>(value)) {
auto& primitiveValue = downcast<CSSPrimitiveValue>(value);
// We translate <ident> to <string> during parsing as it makes handling it simpler.
if (primitiveValue.isString()) {
position.setNamedGridArea(primitiveValue.stringValue());
return true;
}
ASSERT(primitiveValue.valueID() == CSSValueAuto);
return true;
}
auto& values = downcast<CSSValueList>(value);
ASSERT(values.length());
auto it = values.begin();
const CSSPrimitiveValue* currentValue = &downcast<CSSPrimitiveValue>(it->get());
bool isSpanPosition = false;
if (currentValue->valueID() == CSSValueSpan) {
isSpanPosition = true;
++it;
currentValue = it != values.end() ? &downcast<CSSPrimitiveValue>(it->get()) : nullptr;
}
int gridLineNumber = 0;
if (currentValue && currentValue->isNumber()) {
gridLineNumber = currentValue->intValue();
++it;
currentValue = it != values.end() ? &downcast<CSSPrimitiveValue>(it->get()) : nullptr;
}
String gridLineName;
if (currentValue && currentValue->isString()) {
gridLineName = currentValue->stringValue();
++it;
}
ASSERT(it == values.end());
if (isSpanPosition)
position.setSpanPosition(gridLineNumber ? gridLineNumber : 1, gridLineName);
else
position.setExplicitPosition(gridLineNumber, gridLineName);
return true;
}
inline void BuilderConverter::createImplicitNamedGridLinesFromGridArea(const NamedGridAreaMap& namedGridAreas, NamedGridLinesMap& namedGridLines, GridTrackSizingDirection direction)
{
for (auto& area : namedGridAreas) {
GridSpan areaSpan = direction == ForRows ? area.value.rows : area.value.columns;
{
auto& startVector = namedGridLines.add(area.key + "-start", Vector<unsigned>()).iterator->value;
startVector.append(areaSpan.startLine());
std::sort(startVector.begin(), startVector.end());
}
{
auto& endVector = namedGridLines.add(area.key + "-end", Vector<unsigned>()).iterator->value;
endVector.append(areaSpan.endLine());
std::sort(endVector.begin(), endVector.end());
}
}
}
inline Vector<GridTrackSize> BuilderConverter::convertGridTrackSizeList(BuilderState& builderState, const CSSValue& value)
{
ASSERT(value.isValueList());
auto& valueList = downcast<CSSValueList>(value);
Vector<GridTrackSize> trackSizes;
trackSizes.reserveInitialCapacity(valueList.length());
for (auto& currValue : valueList) {
ASSERT(!currValue->isGridLineNamesValue());
ASSERT(!currValue->isGridAutoRepeatValue());
ASSERT(!currValue->isGridIntegerRepeatValue());
trackSizes.uncheckedAppend(convertGridTrackSize(builderState, currValue));
}
return trackSizes;
}
inline GridTrackSize BuilderConverter::convertGridTrackSize(BuilderState& builderState, const CSSValue& value)
{
return createGridTrackSize(value, builderState);
}
inline Optional<GridPosition> BuilderConverter::convertGridPosition(BuilderState&, const CSSValue& value)
{
GridPosition gridPosition;
if (createGridPosition(value, gridPosition))
return gridPosition;
return WTF::nullopt;
}
inline GridAutoFlow BuilderConverter::convertGridAutoFlow(BuilderState&, const CSSValue& value)
{
auto& list = downcast<CSSValueList>(value);
if (!list.length())
return RenderStyle::initialGridAutoFlow();
auto& first = downcast<CSSPrimitiveValue>(*list.item(0));
auto* second = downcast<CSSPrimitiveValue>(list.item(1));
GridAutoFlow autoFlow;
switch (first.valueID()) {
case CSSValueRow:
if (second && second->valueID() == CSSValueDense)
autoFlow = AutoFlowRowDense;
else
autoFlow = AutoFlowRow;
break;
case CSSValueColumn:
if (second && second->valueID() == CSSValueDense)
autoFlow = AutoFlowColumnDense;
else
autoFlow = AutoFlowColumn;
break;
case CSSValueDense:
if (second && second->valueID() == CSSValueColumn)
autoFlow = AutoFlowColumnDense;
else
autoFlow = AutoFlowRowDense;
break;
default:
ASSERT_NOT_REACHED();
autoFlow = RenderStyle::initialGridAutoFlow();
break;
}
return autoFlow;
}
inline CSSToLengthConversionData BuilderConverter::csstoLengthConversionDataWithTextZoomFactor(BuilderState& builderState)
{
if (auto* frame = builderState.document().frame()) {
float textZoomFactor = builderState.style().textZoom() != TextZoom::Reset ? frame->textZoomFactor() : 1.0f;
return builderState.cssToLengthConversionData().copyWithAdjustedZoom(builderState.style().effectiveZoom() * textZoomFactor);
}
return builderState.cssToLengthConversionData();
}
inline Optional<Length> BuilderConverter::convertWordSpacing(BuilderState& builderState, const CSSValue& value)
{
Optional<Length> wordSpacing;
auto& primitiveValue = downcast<CSSPrimitiveValue>(value);
if (primitiveValue.valueID() == CSSValueNormal)
wordSpacing = RenderStyle::initialWordSpacing();
else if (primitiveValue.isLength())
wordSpacing = primitiveValue.computeLength<Length>(csstoLengthConversionDataWithTextZoomFactor(builderState));
else if (primitiveValue.isPercentage())
wordSpacing = Length(clampTo<float>(primitiveValue.doubleValue(), minValueForCssLength, maxValueForCssLength), Percent);
else if (primitiveValue.isNumber())
wordSpacing = Length(primitiveValue.doubleValue(), Fixed);
return wordSpacing;
}
inline Optional<float> BuilderConverter::convertPerspective(BuilderState& builderState, const CSSValue& value)
{
auto& primitiveValue = downcast<CSSPrimitiveValue>(value);
if (primitiveValue.valueID() == CSSValueNone)
return 0.f;
float perspective = -1;
if (primitiveValue.isLength())
perspective = primitiveValue.computeLength<float>(builderState.cssToLengthConversionData());
else if (primitiveValue.isNumber())
perspective = primitiveValue.doubleValue() * builderState.cssToLengthConversionData().zoom();
else
ASSERT_NOT_REACHED();
return perspective < 0 ? Optional<float>(WTF::nullopt) : Optional<float>(perspective);
}
inline Optional<Length> BuilderConverter::convertMarqueeIncrement(BuilderState& builderState, const CSSValue& value)
{
Optional<Length> marqueeLength;
auto& primitiveValue = downcast<CSSPrimitiveValue>(value);
switch (primitiveValue.valueID()) {
case CSSValueSmall:
marqueeLength = Length(1, Fixed); // 1px.
break;
case CSSValueNormal:
marqueeLength = Length(6, Fixed); // 6px. The WinIE default.
break;
case CSSValueLarge:
marqueeLength = Length(36, Fixed); // 36px.
break;
case CSSValueInvalid: {
Length length = primitiveValue.convertToLength<FixedIntegerConversion | PercentConversion | CalculatedConversion>(builderState.cssToLengthConversionData().copyWithAdjustedZoom(1.0f));
if (!length.isUndefined())
marqueeLength = length;
break;
}
default:
break;
}
return marqueeLength;
}
inline Optional<FilterOperations> BuilderConverter::convertFilterOperations(BuilderState& builderState, const CSSValue& value)
{
FilterOperations operations;
if (builderState.createFilterOperations(value, operations))
return operations;
return WTF::nullopt;
}
inline FontFeatureSettings BuilderConverter::convertFontFeatureSettings(BuilderState&, const CSSValue& value)
{
if (is<CSSPrimitiveValue>(value)) {
ASSERT(downcast<CSSPrimitiveValue>(value).valueID() == CSSValueNormal);
return { };
}
FontFeatureSettings settings;
for (auto& item : downcast<CSSValueList>(value)) {
auto& feature = downcast<CSSFontFeatureValue>(item.get());
settings.insert(FontFeature(feature.tag(), feature.value()));
}
return settings;
}
inline FontSelectionValue BuilderConverter::convertFontWeightFromValue(const CSSValue& value)
{
ASSERT(is<CSSPrimitiveValue>(value));
auto& primitiveValue = downcast<CSSPrimitiveValue>(value);
if (primitiveValue.isNumber())
return FontSelectionValue::clampFloat(primitiveValue.floatValue());
ASSERT(primitiveValue.isValueID());
switch (primitiveValue.valueID()) {
case CSSValueNormal:
return normalWeightValue();
case CSSValueBold:
case CSSValueBolder:
return boldWeightValue();
case CSSValueLighter:
return lightWeightValue();
default:
ASSERT_NOT_REACHED();
return normalWeightValue();
}
}
inline FontSelectionValue BuilderConverter::convertFontStretchFromValue(const CSSValue& value)
{
ASSERT(is<CSSPrimitiveValue>(value));
const auto& primitiveValue = downcast<CSSPrimitiveValue>(value);
if (primitiveValue.isPercentage())
return FontSelectionValue::clampFloat(primitiveValue.floatValue());
ASSERT(primitiveValue.isValueID());
if (auto value = fontStretchValue(primitiveValue.valueID()))
return value.value();
ASSERT_NOT_REACHED();
return normalStretchValue();
}
// The input value needs to parsed and valid, this function returns WTF::nullopt if the input was "normal".
inline Optional<FontSelectionValue> BuilderConverter::convertFontStyleFromValue(const CSSValue& value)
{
ASSERT(is<CSSFontStyleValue>(value));
const auto& fontStyleValue = downcast<CSSFontStyleValue>(value);
auto valueID = fontStyleValue.fontStyleValue->valueID();
if (valueID == CSSValueNormal)
return WTF::nullopt;
if (valueID == CSSValueItalic)
return italicValue();
ASSERT(valueID == CSSValueOblique);
if (auto* obliqueValue = fontStyleValue.obliqueValue.get())
return FontSelectionValue(obliqueValue->value<float>(CSSUnitType::CSS_DEG));
return italicValue();
}
inline FontSelectionValue BuilderConverter::convertFontWeight(BuilderState& builderState, const CSSValue& value)
{
ASSERT(is<CSSPrimitiveValue>(value));
auto& primitiveValue = downcast<CSSPrimitiveValue>(value);
if (primitiveValue.isValueID()) {
auto valueID = primitiveValue.valueID();
if (valueID == CSSValueBolder)
return FontCascadeDescription::bolderWeight(builderState.parentStyle().fontDescription().weight());
if (valueID == CSSValueLighter)
return FontCascadeDescription::lighterWeight(builderState.parentStyle().fontDescription().weight());
}
return convertFontWeightFromValue(value);
}
inline FontSelectionValue BuilderConverter::convertFontStretch(BuilderState&, const CSSValue& value)
{
return convertFontStretchFromValue(value);
}
#if ENABLE(VARIATION_FONTS)
inline FontVariationSettings BuilderConverter::convertFontVariationSettings(BuilderState&, const CSSValue& value)
{
if (is<CSSPrimitiveValue>(value)) {
ASSERT(downcast<CSSPrimitiveValue>(value).valueID() == CSSValueNormal);
return { };
}
FontVariationSettings settings;
for (auto& item : downcast<CSSValueList>(value)) {
auto& feature = downcast<CSSFontVariationValue>(item.get());
settings.insert({ feature.tag(), feature.value() });
}
return settings;
}
#endif
#if PLATFORM(IOS_FAMILY)
inline bool BuilderConverter::convertTouchCallout(BuilderState&, const CSSValue& value)
{
return !equalLettersIgnoringASCIICase(downcast<CSSPrimitiveValue>(value).stringValue(), "none");
}
#endif
#if ENABLE(TOUCH_EVENTS)
inline Color BuilderConverter::convertTapHighlightColor(BuilderState& builderState, const CSSValue& value)
{
return builderState.colorFromPrimitiveValue(downcast<CSSPrimitiveValue>(value));
}
#endif
#if ENABLE(POINTER_EVENTS)
inline OptionSet<TouchAction> BuilderConverter::convertTouchAction(BuilderState&, const CSSValue& value)
{
if (is<CSSPrimitiveValue>(value))
return downcast<CSSPrimitiveValue>(value);
if (is<CSSValueList>(value)) {
OptionSet<TouchAction> touchActions;
for (auto& currentValue : downcast<CSSValueList>(value)) {
auto& primitiveValue = downcast<CSSPrimitiveValue>(currentValue.get());
auto primitiveValueID = primitiveValue.valueID();
if (primitiveValueID != CSSValuePanX && primitiveValueID != CSSValuePanY && primitiveValueID != CSSValuePinchZoom)
return RenderStyle::initialTouchActions();
touchActions.add(primitiveValue);
}
return touchActions;
}
return RenderStyle::initialTouchActions();
}
#endif
#if ENABLE(OVERFLOW_SCROLLING_TOUCH)
inline bool BuilderConverter::convertOverflowScrolling(BuilderState&, const CSSValue& value)
{
return downcast<CSSPrimitiveValue>(value).valueID() == CSSValueTouch;
}
#endif
inline SVGLengthValue BuilderConverter::convertSVGLengthValue(BuilderState&, const CSSValue& value)
{
return SVGLengthValue::fromCSSPrimitiveValue(downcast<CSSPrimitiveValue>(value));
}
inline Vector<SVGLengthValue> BuilderConverter::convertSVGLengthVector(BuilderState& builderState, const CSSValue& value)
{
auto& valueList = downcast<CSSValueList>(value);
Vector<SVGLengthValue> svgLengths;
svgLengths.reserveInitialCapacity(valueList.length());
for (auto& item : valueList)
svgLengths.uncheckedAppend(convertSVGLengthValue(builderState, item));
return svgLengths;
}
inline Vector<SVGLengthValue> BuilderConverter::convertStrokeDashArray(BuilderState& builderState, const CSSValue& value)
{
if (is<CSSPrimitiveValue>(value)) {
ASSERT(downcast<CSSPrimitiveValue>(value).valueID() == CSSValueNone);
return SVGRenderStyle::initialStrokeDashArray();
}
return convertSVGLengthVector(builderState, value);
}
inline PaintOrder BuilderConverter::convertPaintOrder(BuilderState&, const CSSValue& value)
{
if (is<CSSPrimitiveValue>(value)) {
ASSERT(downcast<CSSPrimitiveValue>(value).valueID() == CSSValueNormal);
return PaintOrder::Normal;
}
auto& orderTypeList = downcast<CSSValueList>(value);
switch (downcast<CSSPrimitiveValue>(*orderTypeList.itemWithoutBoundsCheck(0)).valueID()) {
case CSSValueFill:
return orderTypeList.length() > 1 ? PaintOrder::FillMarkers : PaintOrder::Fill;
case CSSValueStroke:
return orderTypeList.length() > 1 ? PaintOrder::StrokeMarkers : PaintOrder::Stroke;
case CSSValueMarkers:
return orderTypeList.length() > 1 ? PaintOrder::MarkersStroke : PaintOrder::Markers;
default:
ASSERT_NOT_REACHED();
return PaintOrder::Normal;
}
}
inline float BuilderConverter::convertOpacity(BuilderState&, const CSSValue& value)
{
auto& primitiveValue = downcast<CSSPrimitiveValue>(value);
float opacity = primitiveValue.floatValue();
if (primitiveValue.isPercentage())
opacity /= 100.0f;
return std::max(0.0f, std::min(1.0f, opacity));
}
inline String BuilderConverter::convertSVGURIReference(BuilderState& builderState, const CSSValue& value)
{
String s;
auto& primitiveValue = downcast<CSSPrimitiveValue>(value);
if (primitiveValue.isURI())
s = primitiveValue.stringValue();
return SVGURIReference::fragmentIdentifierFromIRIString(s, builderState.document());
}
inline Color BuilderConverter::convertSVGColor(BuilderState& builderState, const CSSValue& value)
{
return builderState.colorFromPrimitiveValue(downcast<CSSPrimitiveValue>(value));
}
inline StyleSelfAlignmentData BuilderConverter::convertSelfOrDefaultAlignmentData(BuilderState&, const CSSValue& value)
{
StyleSelfAlignmentData alignmentData = RenderStyle::initialSelfAlignment();
auto& primitiveValue = downcast<CSSPrimitiveValue>(value);
if (Pair* pairValue = primitiveValue.pairValue()) {
if (pairValue->first()->valueID() == CSSValueLegacy) {
alignmentData.setPositionType(ItemPositionType::Legacy);
alignmentData.setPosition(*pairValue->second());
} else if (pairValue->first()->valueID() == CSSValueFirst)
alignmentData.setPosition(ItemPosition::Baseline);
else if (pairValue->first()->valueID() == CSSValueLast)
alignmentData.setPosition(ItemPosition::LastBaseline);
else {
alignmentData.setOverflow(*pairValue->first());
alignmentData.setPosition(*pairValue->second());
}
} else
alignmentData.setPosition(primitiveValue);
return alignmentData;
}
inline StyleContentAlignmentData BuilderConverter::convertContentAlignmentData(BuilderState&, const CSSValue& value)
{
StyleContentAlignmentData alignmentData = RenderStyle::initialContentAlignment();
if (!is<CSSContentDistributionValue>(value))
return alignmentData;
auto& contentValue = downcast<CSSContentDistributionValue>(value);
if (contentValue.distribution()->valueID() != CSSValueInvalid)
alignmentData.setDistribution(contentValue.distribution().get());
if (contentValue.position()->valueID() != CSSValueInvalid)
alignmentData.setPosition(contentValue.position().get());
if (contentValue.overflow()->valueID() != CSSValueInvalid)
alignmentData.setOverflow(contentValue.overflow().get());
return alignmentData;
}
inline GlyphOrientation BuilderConverter::convertGlyphOrientation(BuilderState&, const CSSValue& value)
{
float angle = fabsf(fmodf(downcast<CSSPrimitiveValue>(value).floatValue(), 360.0f));
if (angle <= 45.0f || angle > 315.0f)
return GlyphOrientation::Degrees0;
if (angle > 45.0f && angle <= 135.0f)
return GlyphOrientation::Degrees90;
if (angle > 135.0f && angle <= 225.0f)
return GlyphOrientation::Degrees180;
return GlyphOrientation::Degrees270;
}
inline GlyphOrientation BuilderConverter::convertGlyphOrientationOrAuto(BuilderState& builderState, const CSSValue& value)
{
if (downcast<CSSPrimitiveValue>(value).valueID() == CSSValueAuto)
return GlyphOrientation::Auto;
return convertGlyphOrientation(builderState, value);
}
inline Optional<Length> BuilderConverter::convertLineHeight(BuilderState& builderState, const CSSValue& value, float multiplier)
{
auto& primitiveValue = downcast<CSSPrimitiveValue>(value);
if (primitiveValue.valueID() == CSSValueNormal)
return RenderStyle::initialLineHeight();
if (primitiveValue.isLength()) {
Length length = primitiveValue.computeLength<Length>(BuilderConverter::csstoLengthConversionDataWithTextZoomFactor(builderState));
if (multiplier != 1.f)
length = Length(length.value() * multiplier, Fixed);
return length;
}
// Line-height percentages need to inherit as if they were Fixed pixel values. In the example:
// <div style="font-size: 10px; line-height: 150%;"><div style="font-size: 100px;"></div></div>
// the inner element should have line-height of 15px. However, in this example:
// <div style="font-size: 10px; line-height: 1.5;"><div style="font-size: 100px;"></div></div>
// the inner element should have a line-height of 150px. Therefore, we map percentages to Fixed
// values and raw numbers to percentages.
if (primitiveValue.isPercentage()) {
// FIXME: percentage should not be restricted to an integer here.
return Length((builderState.style().computedFontSize() * primitiveValue.intValue()) / 100, Fixed);
}
if (primitiveValue.isNumber())
return Length(primitiveValue.doubleValue() * 100.0, Percent);
// FIXME: The parser should only emit the above types, so this should never be reached. We should change the
// type of this function to return just a Length (and not an Optional).
return WTF::nullopt;
}
inline FontSynthesis BuilderConverter::convertFontSynthesis(BuilderState&, const CSSValue& value)
{
if (is<CSSPrimitiveValue>(value)) {
ASSERT(downcast<CSSPrimitiveValue>(value).valueID() == CSSValueNone);
return FontSynthesisNone;
}
FontSynthesis result = FontSynthesisNone;
ASSERT(is<CSSValueList>(value));
for (const CSSValue& v : downcast<CSSValueList>(value)) {
switch (downcast<CSSPrimitiveValue>(v).valueID()) {
case CSSValueWeight:
result |= FontSynthesisWeight;
break;
case CSSValueStyle:
result |= FontSynthesisStyle;
break;
case CSSValueSmallCaps:
result |= FontSynthesisSmallCaps;
break;
default:
ASSERT_NOT_REACHED();
break;
}
}
return result;
}
inline OptionSet<SpeakAs> BuilderConverter::convertSpeakAs(BuilderState&, const CSSValue& value)
{
auto result = RenderStyle::initialSpeakAs();
if (is<CSSValueList>(value)) {
for (auto& currentValue : downcast<CSSValueList>(value))
result.add(downcast<CSSPrimitiveValue>(currentValue.get()));
}
return result;
}
inline OptionSet<HangingPunctuation> BuilderConverter::convertHangingPunctuation(BuilderState&, const CSSValue& value)
{
auto result = RenderStyle::initialHangingPunctuation();
if (is<CSSValueList>(value)) {
for (auto& currentValue : downcast<CSSValueList>(value))
result.add(downcast<CSSPrimitiveValue>(currentValue.get()));
}
return result;
}
inline GapLength BuilderConverter::convertGapLength(BuilderState& builderState, const CSSValue& value)
{
return (downcast<CSSPrimitiveValue>(value).valueID() == CSSValueNormal) ? GapLength() : GapLength(convertLength(builderState, value));
}
}
}