String StylePropertySet::getShorthandValue(const StylePropertyShorthand& shorthand) const
{
String commonValue;
StringBuilder result;
for (unsigned i = 0; i < shorthand.length(); ++i) {
if (!isPropertyImplicit(shorthand.properties()[i])) {
RefPtr<CSSValue> value = getPropertyCSSValue(shorthand.properties()[i]);
if (!value)
return String();
String valueText = value->cssText();
if (!i)
commonValue = valueText;
else if (!commonValue.isNull() && commonValue != valueText)
commonValue = String();
if (value->isInitialValue())
continue;
if (!result.isEmpty())
result.append(' ');
result.append(valueText);
} else
commonValue = String();
}
if (isInitialOrInherit(commonValue))
return commonValue;
if (result.isEmpty())
return String();
return result.toString();
}
bool StylePropertySet::removeShorthandProperty(CSSPropertyID propertyID)
{
StylePropertyShorthand shorthand = shorthandForProperty(propertyID);
if (!shorthand.length())
return false;
return removePropertiesInSet(shorthand.properties(), shorthand.length());
}
String StylePropertySet::get4Values(const StylePropertyShorthand& shorthand) const
{
// Assume the properties are in the usual order top, right, bottom, left.
const CSSProperty* top = findPropertyWithId(shorthand.properties()[0]);
const CSSProperty* right = findPropertyWithId(shorthand.properties()[1]);
const CSSProperty* bottom = findPropertyWithId(shorthand.properties()[2]);
const CSSProperty* left = findPropertyWithId(shorthand.properties()[3]);
// All 4 properties must be specified.
if (!top || !top->value() || !right || !right->value() || !bottom || !bottom->value() || !left || !left->value())
return String();
if (top->value()->isInitialValue() || right->value()->isInitialValue() || bottom->value()->isInitialValue() || left->value()->isInitialValue())
return String();
if (top->isImportant() != right->isImportant() || right->isImportant() != bottom->isImportant() || bottom->isImportant() != left->isImportant())
return String();
bool showLeft = right->value()->cssText() != left->value()->cssText();
bool showBottom = (top->value()->cssText() != bottom->value()->cssText()) || showLeft;
bool showRight = (top->value()->cssText() != right->value()->cssText()) || showBottom;
String res = top->value()->cssText();
if (showRight)
res += " " + right->value()->cssText();
if (showBottom)
res += " " + bottom->value()->cssText();
if (showLeft)
res += " " + left->value()->cssText();
return res;
}
String StylePropertySet::get4Values(const StylePropertyShorthand& shorthand) const
{
// Assume the properties are in the usual order top, right, bottom, left.
RefPtr<CSSValue> topValue = getPropertyCSSValue(shorthand.properties()[0]);
RefPtr<CSSValue> rightValue = getPropertyCSSValue(shorthand.properties()[1]);
RefPtr<CSSValue> bottomValue = getPropertyCSSValue(shorthand.properties()[2]);
RefPtr<CSSValue> leftValue = getPropertyCSSValue(shorthand.properties()[3]);
// All 4 properties must be specified.
if (!topValue || !rightValue || !bottomValue || !leftValue)
return String();
bool showLeft = rightValue->cssText() != leftValue->cssText();
bool showBottom = (topValue->cssText() != bottomValue->cssText()) || showLeft;
bool showRight = (topValue->cssText() != rightValue->cssText()) || showBottom;
String res = topValue->cssText();
if (showRight)
res += " " + rightValue->cssText();
if (showBottom)
res += " " + bottomValue->cssText();
if (showLeft)
res += " " + leftValue->cssText();
return res;
}
void CSSVariableResolver::resolveAndApplyVariableReferences(StyleResolverState& state, CSSPropertyID id, const CSSVariableReferenceValue& value)
{
CSSVariableResolver resolver(state.style()->variables());
Vector<CSSParserToken> tokens;
if (resolver.resolveTokenRange(value.variableDataValue()->tokens(), tokens)) {
CSSParserContext context(HTMLStandardMode, 0);
HeapVector<CSSProperty, 256> parsedProperties;
// TODO: Non-shorthands should just call CSSPropertyParser::parseSingleValue
if (CSSPropertyParser::parseValue(id, false, CSSParserTokenRange(tokens), context, parsedProperties, StyleRule::RuleType::Style)) {
unsigned parsedPropertiesCount = parsedProperties.size();
for (unsigned i = 0; i < parsedPropertiesCount; ++i)
StyleBuilder::applyProperty(parsedProperties[i].id(), state, parsedProperties[i].value());
return;
}
}
RawPtr<CSSUnsetValue> unset = cssValuePool().createUnsetValue();
if (isShorthandProperty(id)) {
StylePropertyShorthand shorthand = shorthandForProperty(id);
for (unsigned i = 0; i < shorthand.length(); i++)
StyleBuilder::applyProperty(shorthand.properties()[i], state, unset.get());
return;
}
StyleBuilder::applyProperty(id, state, unset.get());
}
bool StylePropertySerializer::isPropertyShorthandAvailable(const StylePropertyShorthand& shorthand) const
{
ASSERT(shorthand.length() > 0);
for (unsigned i = 0; i < shorthand.length(); ++i) {
RefPtr<CSSValue> value = m_propertySet.getPropertyCSSValue(shorthand.properties()[i]);
if (!value || (value->isInitialValue() && !value->isImplicitInitialValue()) || value->isInheritedValue())
return false;
}
return true;
}
bool StylePropertySet::shorthandIsImportant(CSSPropertyID propertyID) const
{
StylePropertyShorthand shorthand = shorthandForProperty(propertyID);
if (!shorthand.length())
return false;
for (unsigned i = 0; i < shorthand.length(); ++i) {
if (!propertyIsImportant(shorthand.properties()[i]))
return false;
}
return true;
}
String StylePropertySet::get4Values(const StylePropertyShorthand& shorthand) const
{
// Assume the properties are in the usual order top, right, bottom, left.
int topValueIndex = findPropertyIndex(shorthand.properties()[0]);
int rightValueIndex = findPropertyIndex(shorthand.properties()[1]);
int bottomValueIndex = findPropertyIndex(shorthand.properties()[2]);
int leftValueIndex = findPropertyIndex(shorthand.properties()[3]);
if (topValueIndex == -1 || rightValueIndex == -1 || bottomValueIndex == -1 || leftValueIndex == -1)
return String();
PropertyReference top = propertyAt(topValueIndex);
PropertyReference right = propertyAt(rightValueIndex);
PropertyReference bottom = propertyAt(bottomValueIndex);
PropertyReference left = propertyAt(leftValueIndex);
// All 4 properties must be specified.
if (!top.value() || !right.value() || !bottom.value() || !left.value())
return String();
if (top.isInherited() && right.isInherited() && bottom.isInherited() && left.isInherited())
return getValueName(CSSValueInherit);
if (top.value()->isInitialValue() || right.value()->isInitialValue() || bottom.value()->isInitialValue() || left.value()->isInitialValue()) {
if (top.value()->isInitialValue() && right.value()->isInitialValue() && bottom.value()->isInitialValue() && left.value()->isInitialValue() && !top.isImplicit()) {
// All components are "initial" and "top" is not implicit.
return getValueName(CSSValueInitial);
}
return String();
}
if (top.isImportant() != right.isImportant() || right.isImportant() != bottom.isImportant() || bottom.isImportant() != left.isImportant())
return String();
bool showLeft = !right.value()->equals(*left.value());
bool showBottom = !top.value()->equals(*bottom.value()) || showLeft;
bool showRight = !top.value()->equals(*right.value()) || showBottom;
StringBuilder result;
result.append(top.value()->cssText());
if (showRight) {
result.append(' ');
result.append(right.value()->cssText());
}
if (showBottom) {
result.append(' ');
result.append(bottom.value()->cssText());
}
if (showLeft) {
result.append(' ');
result.append(left.value()->cssText());
}
return result.toString();
}
bool StylePropertySet::propertyIsImportant(CSSPropertyID propertyID) const
{
const CSSProperty* property = findPropertyWithId(propertyID);
if (property)
return property->isImportant();
StylePropertyShorthand shorthand = shorthandForProperty(propertyID);
if (!shorthand.length())
return false;
for (unsigned i = 0; i < shorthand.length(); ++i) {
if (!propertyIsImportant(shorthand.properties()[i]))
return false;
}
return true;
}
String StylePropertySet::getShorthandValue(const StylePropertyShorthand& shorthand) const
{
String res;
for (unsigned i = 0; i < shorthand.length(); ++i) {
if (!isPropertyImplicit(shorthand.properties()[i])) {
RefPtr<CSSValue> value = getPropertyCSSValue(shorthand.properties()[i]);
// FIXME: provide default value if !value or value is initial value
if (value && !value->isInitialValue()) {
if (!res.isNull())
res += " ";
res += value->cssText();
}
}
}
return res;
}
bool StylePropertySet::propertyIsImportant(CSSPropertyID propertyID) const
{
int foundPropertyIndex = findPropertyIndex(propertyID);
if (foundPropertyIndex != -1)
return propertyAt(foundPropertyIndex).isImportant();
StylePropertyShorthand shorthand = shorthandForProperty(propertyID);
if (!shorthand.length())
return false;
for (unsigned i = 0; i < shorthand.length(); ++i) {
if (!propertyIsImportant(shorthand.properties()[i]))
return false;
}
return true;
}
bool StylePropertySerializer::shorthandHasOnlyInitialOrInheritedValue(const StylePropertyShorthand& shorthand) const
{
ASSERT(shorthand.length() > 0);
bool isInitialValue = true;
bool isInheritedValue = true;
for (unsigned i = 0; i < shorthand.length(); ++i) {
RefPtr<CSSValue> value = m_propertySet.getPropertyCSSValue(shorthand.properties()[i]);
if (!value)
return false;
if (!value->isInitialValue())
isInitialValue = false;
if (!value->isInheritedValue())
isInheritedValue = false;
}
return isInitialValue || isInheritedValue;
}
String StylePropertySet::getShorthandValue(const StylePropertyShorthand& shorthand) const
{
String res;
for (unsigned i = 0; i < shorthand.length(); ++i) {
if (!isPropertyImplicit(shorthand.properties()[i])) {
RefPtr<CSSValue> value = getPropertyCSSValue(shorthand.properties()[i]);
if (!value)
return String();
if (value->isInitialValue())
continue;
if (!res.isNull())
res += " ";
res += value->cssText();
}
}
return res;
}
String StylePropertySet::borderSpacingValue(const StylePropertyShorthand& shorthand) const
{
RefPtr<CSSValue> horizontalValue = getPropertyCSSValue(shorthand.properties()[0]);
RefPtr<CSSValue> verticalValue = getPropertyCSSValue(shorthand.properties()[1]);
// While standard border-spacing property does not allow specifying border-spacing-vertical without
// specifying border-spacing-horizontal <http://www.w3.org/TR/CSS21/tables.html#separated-borders>,
// -webkit-border-spacing-vertical can be set without -webkit-border-spacing-horizontal.
if (!horizontalValue || !verticalValue)
return String();
String horizontalValueCSSText = horizontalValue->cssText();
String verticalValueCSSText = verticalValue->cssText();
if (horizontalValueCSSText == verticalValueCSSText)
return horizontalValueCSSText;
return horizontalValueCSSText + ' ' + verticalValueCSSText;
}
// only returns a non-null value if all properties have the same, non-null value
String StylePropertySerializer::getCommonValue(const StylePropertyShorthand& shorthand) const
{
String res;
for (unsigned i = 0; i < shorthand.length(); ++i) {
RefPtr<CSSValue> value = m_propertySet.getPropertyCSSValue(shorthand.properties()[i]);
// FIXME: CSSInitialValue::cssText should generate the right value.
if (!value)
return String();
String text = value->cssText();
if (text.isNull())
return String();
if (res.isNull())
res = text;
else if (res != text)
return String();
}
return res;
}
// only returns a non-null value if all properties have the same, non-null value
String StylePropertySet::getCommonValue(const StylePropertyShorthand& shorthand) const
{
String res;
bool lastPropertyWasImportant = false;
for (unsigned i = 0; i < shorthand.length(); ++i) {
RefPtr<CSSValue> value = getPropertyCSSValue(shorthand.properties()[i]);
// FIXME: CSSInitialValue::cssText should generate the right value.
if (!value)
return String();
String text = value->cssText();
if (text.isNull())
return String();
if (res.isNull())
res = text;
else if (res != text)
return String();
bool currentPropertyIsImportant = propertyIsImportant(shorthand.properties()[i]);
if (i && lastPropertyWasImportant != currentPropertyIsImportant)
return String();
lastPropertyWasImportant = currentPropertyIsImportant;
}
return res;
}
bool MutableStylePropertySet::removeShorthandProperty(CSSPropertyID propertyID)
{
StylePropertyShorthand shorthand = shorthandForProperty(propertyID);
if (!shorthand.length())
return false;
bool ret = removePropertiesInSet(shorthand.properties(), shorthand.length());
CSSPropertyID prefixingVariant = prefixingVariantForPropertyId(propertyID);
if (prefixingVariant == propertyID)
return ret;
StylePropertyShorthand shorthandPrefixingVariant = shorthandForProperty(prefixingVariant);
return removePropertiesInSet(shorthandPrefixingVariant.properties(), shorthandPrefixingVariant.length());
}
void MutableStylePropertySet::setProperty(CSSPropertyID propertyID, PassRefPtrWillBeRawPtr<CSSValue> prpValue, bool important)
{
StylePropertyShorthand shorthand = shorthandForProperty(propertyID);
if (!shorthand.length()) {
setProperty(CSSProperty(propertyID, prpValue, important));
return;
}
removePropertiesInSet(shorthand.properties(), shorthand.length());
RefPtrWillBeRawPtr<CSSValue> value = prpValue;
for (unsigned i = 0; i < shorthand.length(); ++i)
m_propertyVector.append(CSSProperty(shorthand.properties()[i], value, important));
}
String StylePropertySet::getLayeredShorthandValue(const StylePropertyShorthand& shorthand) const
{
String res;
const unsigned size = shorthand.length();
// Begin by collecting the properties into an array.
Vector< RefPtr<CSSValue> > values(size);
size_t numLayers = 0;
for (unsigned i = 0; i < size; ++i) {
values[i] = getPropertyCSSValue(shorthand.properties()[i]);
if (values[i]) {
if (values[i]->isValueList()) {
CSSValueList* valueList = static_cast<CSSValueList*>(values[i].get());
numLayers = max(valueList->length(), numLayers);
} else
numLayers = max<size_t>(1U, numLayers);
}
}
// Now stitch the properties together. Implicit initial values are flagged as such and
// can safely be omitted.
for (size_t i = 0; i < numLayers; i++) {
String layerRes;
bool useRepeatXShorthand = false;
bool useRepeatYShorthand = false;
bool useSingleWordShorthand = false;
for (unsigned j = 0; j < size; j++) {
RefPtr<CSSValue> value;
if (values[j]) {
if (values[j]->isValueList())
value = static_cast<CSSValueList*>(values[j].get())->item(i);
else {
value = values[j];
// Color only belongs in the last layer.
if (shorthand.properties()[j] == CSSPropertyBackgroundColor) {
if (i != numLayers - 1)
value = 0;
} else if (i != 0) // Other singletons only belong in the first layer.
value = 0;
}
}
// We need to report background-repeat as it was written in the CSS. If the property is implicit,
// then it was written with only one value. Here we figure out which value that was so we can
// report back correctly.
if (shorthand.properties()[j] == CSSPropertyBackgroundRepeatX && isPropertyImplicit(shorthand.properties()[j])) {
// BUG 49055: make sure the value was not reset in the layer check just above.
if (j < size - 1 && shorthand.properties()[j + 1] == CSSPropertyBackgroundRepeatY && value) {
RefPtr<CSSValue> yValue;
RefPtr<CSSValue> nextValue = values[j + 1];
if (nextValue->isValueList())
yValue = static_cast<CSSValueList*>(nextValue.get())->itemWithoutBoundsCheck(i);
else
yValue = nextValue;
int xId = static_cast<CSSPrimitiveValue*>(value.get())->getIdent();
int yId = static_cast<CSSPrimitiveValue*>(yValue.get())->getIdent();
if (xId != yId) {
if (xId == CSSValueRepeat && yId == CSSValueNoRepeat) {
useRepeatXShorthand = true;
++j;
} else if (xId == CSSValueNoRepeat && yId == CSSValueRepeat) {
useRepeatYShorthand = true;
continue;
}
} else {
useSingleWordShorthand = true;
++j;
}
}
}
if (value && !value->isImplicitInitialValue()) {
if (!layerRes.isNull())
layerRes += " ";
if (useRepeatXShorthand) {
useRepeatXShorthand = false;
layerRes += getValueName(CSSValueRepeatX);
} else if (useRepeatYShorthand) {
useRepeatYShorthand = false;
layerRes += getValueName(CSSValueRepeatY);
} else if (useSingleWordShorthand) {
useSingleWordShorthand = false;
layerRes += value->cssText();
} else
layerRes += value->cssText();
}
}
if (!layerRes.isNull()) {
if (!res.isNull())
res += ", ";
res += layerRes;
}
}
return res;
}
String StylePropertySet::getLayeredShorthandValue(const StylePropertyShorthand& shorthand) const
{
StringBuilder result;
const unsigned size = shorthand.length();
// Begin by collecting the properties into an array.
Vector< RefPtr<CSSValue> > values(size);
size_t numLayers = 0;
for (unsigned i = 0; i < size; ++i) {
values[i] = getPropertyCSSValue(shorthand.properties()[i]);
if (values[i]) {
if (values[i]->isBaseValueList()) {
CSSValueList* valueList = static_cast<CSSValueList*>(values[i].get());
numLayers = max(valueList->length(), numLayers);
} else
numLayers = max<size_t>(1U, numLayers);
}
}
String commonValue;
bool commonValueInitialized = false;
// Now stitch the properties together. Implicit initial values are flagged as such and
// can safely be omitted.
for (size_t i = 0; i < numLayers; i++) {
StringBuilder layerResult;
bool useRepeatXShorthand = false;
bool useRepeatYShorthand = false;
bool useSingleWordShorthand = false;
bool foundPositionYCSSProperty = false;
for (unsigned j = 0; j < size; j++) {
RefPtr<CSSValue> value;
if (values[j]) {
if (values[j]->isBaseValueList())
value = static_cast<CSSValueList*>(values[j].get())->item(i);
else {
value = values[j];
// Color only belongs in the last layer.
if (shorthand.properties()[j] == CSSPropertyBackgroundColor) {
if (i != numLayers - 1)
value = 0;
} else if (i != 0) // Other singletons only belong in the first layer.
value = 0;
}
}
// We need to report background-repeat as it was written in the CSS. If the property is implicit,
// then it was written with only one value. Here we figure out which value that was so we can
// report back correctly.
if ((shorthand.properties()[j] == CSSPropertyBackgroundRepeatX && isPropertyImplicit(shorthand.properties()[j]))
|| (shorthand.properties()[j] == CSSPropertyWebkitMaskRepeatX && isPropertyImplicit(shorthand.properties()[j]))) {
// BUG 49055: make sure the value was not reset in the layer check just above.
if ((j < size - 1 && shorthand.properties()[j + 1] == CSSPropertyBackgroundRepeatY && value)
|| (j < size - 1 && shorthand.properties()[j + 1] == CSSPropertyWebkitMaskRepeatY && value)) {
RefPtr<CSSValue> yValue;
RefPtr<CSSValue> nextValue = values[j + 1];
if (nextValue->isValueList())
yValue = static_cast<CSSValueList*>(nextValue.get())->itemWithoutBoundsCheck(i);
else
yValue = nextValue;
int xId = static_cast<CSSPrimitiveValue*>(value.get())->getIdent();
int yId = static_cast<CSSPrimitiveValue*>(yValue.get())->getIdent();
if (xId != yId) {
if (xId == CSSValueRepeat && yId == CSSValueNoRepeat) {
useRepeatXShorthand = true;
++j;
} else if (xId == CSSValueNoRepeat && yId == CSSValueRepeat) {
useRepeatYShorthand = true;
continue;
}
} else {
useSingleWordShorthand = true;
++j;
}
}
}
String valueText;
if (value && !value->isImplicitInitialValue()) {
if (!layerResult.isEmpty())
layerResult.append(' ');
if (foundPositionYCSSProperty
&& (shorthand.properties()[j] == CSSPropertyBackgroundSize || shorthand.properties()[j] == CSSPropertyWebkitMaskSize))
layerResult.appendLiteral("/ ");
if (!foundPositionYCSSProperty
&& (shorthand.properties()[j] == CSSPropertyBackgroundSize || shorthand.properties()[j] == CSSPropertyWebkitMaskSize))
continue;
if (useRepeatXShorthand) {
useRepeatXShorthand = false;
layerResult.append(getValueName(CSSValueRepeatX));
} else if (useRepeatYShorthand) {
useRepeatYShorthand = false;
layerResult.append(getValueName(CSSValueRepeatY));
} else {
if (useSingleWordShorthand)
useSingleWordShorthand = false;
valueText = value->cssText();
layerResult.append(valueText);
}
if (shorthand.properties()[j] == CSSPropertyBackgroundPositionY
|| shorthand.properties()[j] == CSSPropertyWebkitMaskPositionY) {
foundPositionYCSSProperty = true;
// background-position is a special case: if only the first offset is specified,
// the second one defaults to "center", not the same value.
if (commonValueInitialized && commonValue != "initial" && commonValue != "inherit")
commonValue = String();
}
}
if (!commonValueInitialized) {
commonValue = valueText;
commonValueInitialized = true;
} else if (!commonValue.isNull() && commonValue != valueText)
commonValue = String();
}
if (!layerResult.isEmpty()) {
if (!result.isEmpty())
result.appendLiteral(", ");
result.append(layerResult);
}
}
if (isInitialOrInherit(commonValue))
return commonValue;
if (result.isEmpty())
return String();
return result.toString();
}
static CSSPropertyID resolveToPhysicalProperty(TextDirection direction, WritingMode writingMode, LogicalBoxSide logicalSide, const StylePropertyShorthand& shorthand)
{
if (direction == LTR) {
if (writingMode == TopToBottomWritingMode) {
// The common case. The logical and physical box sides match.
// Left = Start, Right = End, Before = Top, After = Bottom
return shorthand.properties()[logicalSide];
}
if (writingMode == BottomToTopWritingMode) {
// Start = Left, End = Right, Before = Bottom, After = Top.
switch (logicalSide) {
case StartSide:
return shorthand.properties()[LeftSide];
case EndSide:
return shorthand.properties()[RightSide];
case BeforeSide:
return shorthand.properties()[BottomSide];
default:
return shorthand.properties()[TopSide];
}
}
if (writingMode == LeftToRightWritingMode) {
// Start = Top, End = Bottom, Before = Left, After = Right.
switch (logicalSide) {
case StartSide:
return shorthand.properties()[TopSide];
case EndSide:
return shorthand.properties()[BottomSide];
case BeforeSide:
return shorthand.properties()[LeftSide];
default:
return shorthand.properties()[RightSide];
}
}
// Start = Top, End = Bottom, Before = Right, After = Left
switch (logicalSide) {
case StartSide:
return shorthand.properties()[TopSide];
case EndSide:
return shorthand.properties()[BottomSide];
case BeforeSide:
return shorthand.properties()[RightSide];
default:
return shorthand.properties()[LeftSide];
}
}
if (writingMode == TopToBottomWritingMode) {
// Start = Right, End = Left, Before = Top, After = Bottom
switch (logicalSide) {
case StartSide:
return shorthand.properties()[RightSide];
case EndSide:
return shorthand.properties()[LeftSide];
case BeforeSide:
return shorthand.properties()[TopSide];
default:
return shorthand.properties()[BottomSide];
}
}
if (writingMode == BottomToTopWritingMode) {
// Start = Right, End = Left, Before = Bottom, After = Top
switch (logicalSide) {
case StartSide:
return shorthand.properties()[RightSide];
case EndSide:
return shorthand.properties()[LeftSide];
case BeforeSide:
return shorthand.properties()[BottomSide];
default:
return shorthand.properties()[TopSide];
}
}
if (writingMode == LeftToRightWritingMode) {
// Start = Bottom, End = Top, Before = Left, After = Right
switch (logicalSide) {
case StartSide:
return shorthand.properties()[BottomSide];
case EndSide:
return shorthand.properties()[TopSide];
case BeforeSide:
return shorthand.properties()[LeftSide];
default:
return shorthand.properties()[RightSide];
}
}
// Start = Bottom, End = Top, Before = Right, After = Left
switch (logicalSide) {
case StartSide:
return shorthand.properties()[BottomSide];
case EndSide:
return shorthand.properties()[TopSide];
case BeforeSide:
return shorthand.properties()[RightSide];
default:
return shorthand.properties()[LeftSide];
}
}
