Exemplo n.º 1
0
bool SizesAttributeParser::parse(CSSParserTokenRange range)
{
    // Split on a comma token and parse the result tokens as (media-condition, length) pairs
    while (!range.atEnd()) {
        const CSSParserToken* mediaConditionStart = &range.peek();
        // The length is the last component value before the comma which isn't whitespace or a comment
        const CSSParserToken* lengthTokenStart = &range.peek();
        const CSSParserToken* lengthTokenEnd = &range.peek();
        while (!range.atEnd() && range.peek().type() != CommaToken) {
            lengthTokenStart = &range.peek();
            range.consumeComponentValue();
            lengthTokenEnd = &range.peek();
            range.consumeWhitespace();
        }
        range.consume();

        float length;
        if (!calculateLengthInPixels(range.makeSubRange(lengthTokenStart, lengthTokenEnd), length))
            continue;
        RefPtrWillBeRawPtr<MediaQuerySet> mediaCondition = MediaQueryParser::parseMediaCondition(range.makeSubRange(mediaConditionStart, lengthTokenStart));
        if (!mediaCondition || !mediaConditionMatches(mediaCondition))
            continue;
        m_length = length;
        m_lengthWasSet = true;
        return true;
    }
    return false;
}
Exemplo n.º 2
0
bool CSSVariableData::checkVariablesForCyclesWithRange(CSSParserTokenRange range, CustomPropertyValueMap& customProperties, HashSet<AtomicString>& seenProperties, HashSet<AtomicString>& invalidProperties) const
{
    while (!range.atEnd()) {
        if (range.peek().functionId() == CSSValueVar) {
            CSSParserTokenRange block = range.consumeBlock();
            
            block.consumeWhitespace();
            ASSERT(block.peek().type() == IdentToken);
            AtomicString variableName = block.consumeIncludingWhitespace().value().toAtomicString();
            ASSERT(block.atEnd() || block.peek().type() == CommaToken);
            if (seenProperties.contains(variableName))
                return false;

            RefPtr<CSSCustomPropertyValue> value = customProperties.get(variableName);
            if (value && value->containsVariables() && !value->checkVariablesForCycles(variableName, customProperties, seenProperties, invalidProperties))
                return false;

            if (range.peek().type() == CommaToken) {
                // Fallback.
                range.consume();
                return checkVariablesForCyclesWithRange(block, customProperties, seenProperties, invalidProperties);
            }
        } else
            range.consume();
    }
    return true;
}
PassRefPtrWillBeRawPtr<StyleRuleBase> CSSParserImpl::consumeAtRule(CSSParserTokenRange& range, AllowedRulesType allowedRules)
{
    ASSERT(range.peek().type() == AtKeywordToken);
    const CSSParserString& name = range.consume().value();
    const CSSParserToken* preludeStart = &range.peek();
    while (!range.atEnd() && range.peek().type() != LeftBraceToken && range.peek().type() != SemicolonToken)
        range.consumeComponentValue();

    CSSParserTokenRange prelude = range.makeSubRange(preludeStart, &range.peek());
    CSSAtRuleID id = cssAtRuleID(name);
    if (id != CSSAtRuleInvalid && m_context.useCounter())
        countAtRule(m_context.useCounter(), id);

    if (range.atEnd() || range.peek().type() == SemicolonToken) {
        range.consume();
        if (allowedRules == AllowCharsetRules && id == CSSAtRuleCharset)
            return consumeCharsetRule(prelude);
        if (allowedRules <= AllowImportRules && id == CSSAtRuleImport)
            return consumeImportRule(prelude);
        if (allowedRules <= AllowNamespaceRules && id == CSSAtRuleNamespace)
            return consumeNamespaceRule(prelude);
        return nullptr; // Parse error, unrecognised at-rule without block
    }

    CSSParserTokenRange block = range.consumeBlock();
    if (allowedRules == KeyframeRules)
        return nullptr; // Parse error, no at-rules supported inside @keyframes
    if (allowedRules == NoRules)
        return nullptr; // Parse error, no at-rules supported inside declaration lists

    ASSERT(allowedRules <= RegularRules);

    switch (id) {
    case CSSAtRuleMedia:
        return consumeMediaRule(prelude, block);
    case CSSAtRuleSupports:
        return consumeSupportsRule(prelude, block);
    case CSSAtRuleViewport:
        return consumeViewportRule(prelude, block);
    case CSSAtRuleFontFace:
        return consumeFontFaceRule(prelude, block);
    case CSSAtRuleWebkitKeyframes:
        return consumeKeyframesRule(true, prelude, block);
    case CSSAtRuleKeyframes:
        return consumeKeyframesRule(false, prelude, block);
    case CSSAtRulePage:
        return consumePageRule(prelude, block);
    default:
        return nullptr; // Parse error, unrecognised at-rule with block
    }
}
void CSSParserImpl::consumeDeclarationList(CSSParserTokenRange range, StyleRule::Type ruleType)
{
    ASSERT(m_parsedProperties.isEmpty());

    bool useObserver = m_observerWrapper && ruleType == StyleRule::Style;
    if (useObserver) {
        m_observerWrapper->observer().startRuleBody(m_observerWrapper->previousTokenStartOffset(range));
        m_observerWrapper->skipCommentsBefore(range, true);
    }

    while (!range.atEnd()) {
        switch (range.peek().type()) {
        case WhitespaceToken:
        case SemicolonToken:
            range.consume();
            break;
        case IdentToken: {
            const CSSParserToken* declarationStart = &range.peek();

            if (useObserver)
                m_observerWrapper->yieldCommentsBefore(range);

            while (!range.atEnd() && range.peek().type() != SemicolonToken)
                range.consumeComponentValue();

            consumeDeclaration(range.makeSubRange(declarationStart, &range.peek()), ruleType);

            if (useObserver)
                m_observerWrapper->skipCommentsBefore(range, false);
            break;
        }
        case AtKeywordToken: {
            RefPtrWillBeRawPtr<StyleRuleBase> rule = consumeAtRule(range, NoRules);
            ASSERT_UNUSED(rule, !rule);
            break;
        }
        default: // Parse error, unexpected token in declaration list
            while (!range.atEnd() && range.peek().type() != SemicolonToken)
                range.consumeComponentValue();
            break;
        }
    }

    // Yield remaining comments
    if (useObserver) {
        m_observerWrapper->yieldCommentsBefore(range);
        m_observerWrapper->observer().endRuleBody(m_observerWrapper->endOffset(range));
    }
}
void CSSVariableResolver::resolveApplyAtRule(CSSParserTokenRange& range,
    Vector<CSSParserToken>& result)
{
    ASSERT(range.peek().type() == AtKeywordToken && range.peek().valueEqualsIgnoringASCIICase("apply"));
    range.consumeIncludingWhitespace();
    const CSSParserToken& variableName = range.consumeIncludingWhitespace();
    // TODO(timloh): Should we actually be consuming this?
    if (range.peek().type() == SemicolonToken)
        range.consume();

    CSSVariableData* variableData = valueForCustomProperty(variableName.value());
    if (!variableData)
        return; // Invalid custom property

    CSSParserTokenRange rule = variableData->tokenRange();
    rule.consumeWhitespace();
    if (rule.peek().type() != LeftBraceToken)
        return;
    CSSParserTokenRange ruleContents = rule.consumeBlock();
    rule.consumeWhitespace();
    if (!rule.atEnd())
        return;

    result.appendRange(ruleContents.begin(), ruleContents.end());
}
Exemplo n.º 6
0
    bool parseValueMultiplicativeExpression(CSSParserTokenRange& tokens, int depth, Value* result)
    {
        if (checkDepthAndIndex(&depth, tokens) != OK)
            return false;

        if (!parseValueTerm(tokens, depth, result))
            return false;

        while (!tokens.atEnd()) {
            char operatorCharacter = operatorValue(tokens.peek());
            if (operatorCharacter != CalcMultiply && operatorCharacter != CalcDivide)
                break;
            tokens.consumeIncludingWhitespace();

            Value rhs;
            if (!parseValueTerm(tokens, depth, &rhs))
                return false;

            result->value = CSSCalcBinaryOperation::createSimplified(result->value, rhs.value, static_cast<CalcOperator>(operatorCharacter));
            if (!result->value)
                return false;
        }

        return true;
    }
Exemplo n.º 7
0
    bool parseAdditiveValueExpression(CSSParserTokenRange& tokens, int depth, Value* result)
    {
        if (checkDepthAndIndex(&depth, tokens) != OK)
            return false;

        if (!parseValueMultiplicativeExpression(tokens, depth, result))
            return false;

        while (!tokens.atEnd()) {
            char operatorCharacter = operatorValue(tokens.peek());
            if (operatorCharacter != CalcAdd && operatorCharacter != CalcSubtract)
                break;
            if ((&tokens.peek() - 1)->type() != WhitespaceToken)
                return false; // calc(1px+ 2px) is invalid
            tokens.consume();
            if (tokens.peek().type() != WhitespaceToken)
                return false; // calc(1px +2px) is invalid
            tokens.consumeIncludingWhitespace();

            Value rhs;
            if (!parseValueMultiplicativeExpression(tokens, depth, &rhs))
                return false;

            result->value = CSSCalcBinaryOperation::createSimplified(result->value, rhs.value, static_cast<CalcOperator>(operatorCharacter));
            if (!result->value)
                return false;
        }

        return true;
    }
PassRefPtrWillBeRawPtr<StyleRuleKeyframes> CSSParserImpl::consumeKeyframesRule(bool webkitPrefixed, CSSParserTokenRange prelude, CSSParserTokenRange block)
{
    prelude.consumeWhitespace();
    const CSSParserToken& nameToken = prelude.consumeIncludingWhitespace();
    if (!prelude.atEnd())
        return nullptr; // Parse error; expected single non-whitespace token in @keyframes header

    String name;
    if (nameToken.type() == IdentToken) {
        name = nameToken.value();
    } else if (nameToken.type() == StringToken && webkitPrefixed) {
        if (m_context.useCounter())
            m_context.useCounter()->count(UseCounter::QuotedKeyframesRule);
        name = nameToken.value();
    } else {
        return nullptr; // Parse error; expected ident token in @keyframes header
    }

    if (m_observerWrapper) {
        unsigned endOffset = m_observerWrapper->endOffset(prelude);
        m_observerWrapper->observer().startRuleHeader(StyleRule::Keyframes, m_observerWrapper->startOffset(prelude));
        m_observerWrapper->observer().endRuleHeader(m_observerWrapper->endOffset(prelude));
        m_observerWrapper->observer().startRuleBody(endOffset);
        m_observerWrapper->observer().endRuleBody(endOffset);
    }

    RefPtrWillBeRawPtr<StyleRuleKeyframes> keyframeRule = StyleRuleKeyframes::create();
    consumeRuleList(block, KeyframesRuleList, [keyframeRule](PassRefPtrWillBeRawPtr<StyleRuleBase> keyframe) {
        keyframeRule->parserAppendKeyframe(toStyleRuleKeyframe(keyframe.get()));
    });
    keyframeRule->setName(name);
    keyframeRule->setVendorPrefixed(webkitPrefixed);
    return keyframeRule.release();
}
Exemplo n.º 9
0
static bool parseRGBParameters(CSSParserTokenRange& range, RGBA32& result, bool parseAlpha)
{
    ASSERT(range.peek().functionId() == CSSValueRgb || range.peek().functionId() == CSSValueRgba);
    CSSParserTokenRange args = consumeFunction(range);
    CSSPrimitiveValue* colorParameter = consumeInteger(args);
    if (!colorParameter)
        colorParameter = consumePercent(args, ValueRangeAll);
    if (!colorParameter)
        return false;
    const bool isPercent = colorParameter->isPercentage();
    int colorArray[3];
    colorArray[0] = clampRGBComponent(*colorParameter);
    for (int i = 1; i < 3; i++) {
        if (!consumeCommaIncludingWhitespace(args))
            return false;
        colorParameter = isPercent ? consumePercent(args, ValueRangeAll) : consumeInteger(args);
        if (!colorParameter)
            return false;
        colorArray[i] = clampRGBComponent(*colorParameter);
    }
    if (parseAlpha) {
        if (!consumeCommaIncludingWhitespace(args))
            return false;
        double alpha;
        if (!consumeNumberRaw(args, alpha))
            return false;
        // Convert the floating pointer number of alpha to an integer in the range [0, 256),
        // with an equal distribution across all 256 values.
        int alphaComponent = static_cast<int>(clampTo<double>(alpha, 0.0, 1.0) * nextafter(256.0, 0.0));
        result = makeRGBA(colorArray[0], colorArray[1], colorArray[2], alphaComponent);
    } else {
        result = makeRGB(colorArray[0], colorArray[1], colorArray[2]);
    }
    return args.atEnd();
}
bool isValidVariableReference(CSSParserTokenRange range)
{
    range.consumeWhitespace();
    if (!CSSVariableParser::isValidVariableName(range.consumeIncludingWhitespace()))
        return false;
    if (range.atEnd())
        return true;

    if (range.consume().type() != CommaToken)
        return false;
    if (range.atEnd())
        return false;

    bool hasReferences = false;
    return classifyBlock(range, hasReferences);
}
Exemplo n.º 11
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static bool parseHSLParameters(CSSParserTokenRange& range, RGBA32& result, bool parseAlpha)
{
    ASSERT(range.peek().functionId() == CSSValueHsl || range.peek().functionId() == CSSValueHsla);
    CSSParserTokenRange args = consumeFunction(range);
    CSSPrimitiveValue* hslValue = consumeNumber(args, ValueRangeAll);
    if (!hslValue)
        return false;
    double colorArray[3];
    colorArray[0] = (((hslValue->getIntValue() % 360) + 360) % 360) / 360.0;
    for (int i = 1; i < 3; i++) {
        if (!consumeCommaIncludingWhitespace(args))
            return false;
        hslValue = consumePercent(args, ValueRangeAll);
        if (!hslValue)
            return false;
        double doubleValue = hslValue->getDoubleValue();
        colorArray[i] = clampTo<double>(doubleValue, 0.0, 100.0) / 100.0; // Needs to be value between 0 and 1.0.
    }
    double alpha = 1.0;
    if (parseAlpha) {
        if (!consumeCommaIncludingWhitespace(args))
            return false;
        if (!consumeNumberRaw(args, alpha))
            return false;
        alpha = clampTo<double>(alpha, 0.0, 1.0);
    }
    result = makeRGBAFromHSLA(colorArray[0], colorArray[1], colorArray[2], alpha);
    return args.atEnd();
}
Exemplo n.º 12
0
bool CSSVariableData::resolveVariableFallback(const CustomPropertyValueMap& customProperties, CSSParserTokenRange range, Vector<CSSParserToken>& result) const
{
    if (range.atEnd())
        return false;
    ASSERT(range.peek().type() == CommaToken);
    range.consume();
    return resolveTokenRange(customProperties, range, result);
}
bool CSSVariableResolver::resolveFallback(CSSParserTokenRange range, Vector<CSSParserToken>& result)
{
    if (range.atEnd())
        return false;
    ASSERT(range.peek().type() == CommaToken);
    range.consume();
    return resolveTokenRange(range, result);
}
Exemplo n.º 14
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PassRefPtrWillBeRawPtr<StyleRuleCharset> CSSParserImpl::consumeCharsetRule(CSSParserTokenRange prelude)
{
    prelude.consumeWhitespace();
    const CSSParserToken& string = prelude.consumeIncludingWhitespace();
    if (string.type() != StringToken || !prelude.atEnd())
        return nullptr; // Parse error, expected a single string
    return StyleRuleCharset::create();
}
Exemplo n.º 15
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PassRefPtrWillBeRawPtr<StyleRuleBase> CSSParserImpl::consumeAtRule(CSSParserTokenRange& range, AllowedRulesType allowedRules)
{
    ASSERT(range.peek().type() == AtKeywordToken);
    const CSSParserString& name = range.consume().value();
    const CSSParserToken* preludeStart = &range.peek();
    while (!range.atEnd() && range.peek().type() != LeftBraceToken && range.peek().type() != SemicolonToken)
        range.consumeComponentValue();

    CSSParserTokenRange prelude = range.makeSubRange(preludeStart, &range.peek());

    if (range.atEnd() || range.peek().type() == SemicolonToken) {
        range.consume();
        if (allowedRules == AllowCharsetRules && name.equalIgnoringCase("charset"))
            return consumeCharsetRule(prelude);
        if (allowedRules <= AllowImportRules && name.equalIgnoringCase("import"))
            return consumeImportRule(prelude);
        if (allowedRules <= AllowNamespaceRules && name.equalIgnoringCase("namespace"))
            return consumeNamespaceRule(prelude);
        return nullptr; // Parse error, unrecognised at-rule without block
    }

    CSSParserTokenRange block = range.consumeBlock();
    if (allowedRules == KeyframeRules)
        return nullptr; // Parse error, no at-rules supported inside @keyframes
    if (allowedRules == NoRules)
        return nullptr; // Parse error, no at-rules supported inside declaration lists

    ASSERT(allowedRules <= RegularRules);

    if (name.equalIgnoringCase("media"))
        return consumeMediaRule(prelude, block);
    if (name.equalIgnoringCase("supports"))
        return consumeSupportsRule(prelude, block);
    if (name.equalIgnoringCase("viewport"))
        return consumeViewportRule(prelude, block);
    if (name.equalIgnoringCase("font-face"))
        return consumeFontFaceRule(prelude, block);
    if (name.equalIgnoringCase("-webkit-keyframes"))
        return consumeKeyframesRule(true, prelude, block);
    if (name.equalIgnoringCase("keyframes"))
        return consumeKeyframesRule(false, prelude, block);
    if (name.equalIgnoringCase("page"))
        return consumePageRule(prelude, block);
    return nullptr; // Parse error, unrecognised at-rule with block
}
Exemplo n.º 16
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std::unique_ptr<CSSParserSelector> CSSSelectorParser::consumeAttribute(
    CSSParserTokenRange& range) {
  ASSERT(range.peek().type() == LeftBracketToken);
  CSSParserTokenRange block = range.consumeBlock();
  block.consumeWhitespace();

  AtomicString namespacePrefix;
  AtomicString attributeName;
  if (!consumeName(block, attributeName, namespacePrefix))
    return nullptr;
  block.consumeWhitespace();

  if (m_context.isHTMLDocument())
    attributeName = attributeName.lower();

  AtomicString namespaceURI = determineNamespace(namespacePrefix);
  if (namespaceURI.isNull())
    return nullptr;

  QualifiedName qualifiedName =
      namespacePrefix.isNull()
          ? QualifiedName(nullAtom, attributeName, nullAtom)
          : QualifiedName(namespacePrefix, attributeName, namespaceURI);

  std::unique_ptr<CSSParserSelector> selector = CSSParserSelector::create();

  if (block.atEnd()) {
    selector->setAttribute(qualifiedName, CSSSelector::CaseSensitive);
    selector->setMatch(CSSSelector::AttributeSet);
    return selector;
  }

  selector->setMatch(consumeAttributeMatch(block));

  const CSSParserToken& attributeValue = block.consumeIncludingWhitespace();
  if (attributeValue.type() != IdentToken &&
      attributeValue.type() != StringToken)
    return nullptr;
  selector->setValue(attributeValue.value().toAtomicString());
  selector->setAttribute(qualifiedName, consumeAttributeFlags(block));

  if (!block.atEnd())
    return nullptr;
  return selector;
}
Exemplo n.º 17
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 PassRefPtrWillBeRawPtr<CSSCalcExpressionNode> parseCalc(CSSParserTokenRange tokens)
 {
     Value result;
     tokens.consumeWhitespace();
     bool ok = parseValueExpression(tokens, 0, &result);
     if (!ok || !tokens.atEnd())
         return nullptr;
     return result.value;
 }
Exemplo n.º 18
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static ParseState checkDepthAndIndex(int* depth, CSSParserTokenRange tokens)
{
    (*depth)++;
    if (tokens.atEnd())
        return NoMoreTokens;
    if (*depth > maxExpressionDepth)
        return TooDeep;
    return OK;
}
Exemplo n.º 19
0
CSSSupportsParser::SupportsResult CSSSupportsParser::consumeCondition(
    CSSParserTokenRange range) {
  if (range.peek().type() == IdentToken)
    return consumeNegation(range);

  bool result;
  ClauseType clauseType = Unresolved;

  while (true) {
    SupportsResult nextResult = consumeConditionInParenthesis(range);
    if (nextResult == Invalid)
      return Invalid;
    bool nextSupported = nextResult;
    if (clauseType == Unresolved)
      result = nextSupported;
    else if (clauseType == Conjunction)
      result &= nextSupported;
    else
      result |= nextSupported;

    if (range.atEnd())
      break;
    if (range.consumeIncludingWhitespace().type() != WhitespaceToken)
      return Invalid;
    if (range.atEnd())
      break;

    const CSSParserToken& token = range.consume();
    if (token.type() != IdentToken)
      return Invalid;
    if (clauseType == Unresolved)
      clauseType = token.value().length() == 3 ? Conjunction : Disjunction;
    if ((clauseType == Conjunction &&
         !equalIgnoringASCIICase(token.value(), "and")) ||
        (clauseType == Disjunction &&
         !equalIgnoringASCIICase(token.value(), "or")))
      return Invalid;

    if (range.consumeIncludingWhitespace().type() != WhitespaceToken)
      return Invalid;
  }
  return result ? Supported : Unsupported;
}
Exemplo n.º 20
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static void observeSelectors(CSSParserObserverWrapper& wrapper, CSSParserTokenRange selectors)
{
    // This is easier than hooking into the CSSSelectorParser
    selectors.consumeWhitespace();
    CSSParserTokenRange originalRange = selectors;
    wrapper.observer().startRuleHeader(StyleRule::Style, wrapper.startOffset(originalRange));

    while (!selectors.atEnd()) {
        const CSSParserToken* selectorStart = &selectors.peek();
        while (!selectors.atEnd() && selectors.peek().type() != CommaToken)
            selectors.consumeComponentValue();
        CSSParserTokenRange selector = selectors.makeSubRange(selectorStart, &selectors.peek());
        selectors.consumeIncludingWhitespace();

        wrapper.observer().observeSelector(wrapper.startOffset(selector), wrapper.endOffset(selector));
    }

    wrapper.observer().endRuleHeader(wrapper.endOffset(originalRange));
}
Exemplo n.º 21
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bool CSSVariableData::resolveTokenRange(const CustomPropertyValueMap& customProperties, CSSParserTokenRange range, Vector<CSSParserToken>& result) const
{
    bool success = true;
    while (!range.atEnd()) {
        if (range.peek().functionId() == CSSValueVar)
            success &= resolveVariableReference(customProperties, range.consumeBlock(), result);
        else
            result.append(range.consume());
    }
    return success;
}
Exemplo n.º 22
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PassRefPtrWillBeRawPtr<StyleRuleBase> CSSParserImpl::consumeQualifiedRule(CSSParserTokenRange& range, AllowedRulesType allowedRules)
{
    const CSSParserToken* preludeStart = &range.peek();
    while (!range.atEnd() && range.peek().type() != LeftBraceToken)
        range.consumeComponentValue();

    if (range.atEnd())
        return nullptr; // Parse error, EOF instead of qualified rule block

    CSSParserTokenRange prelude = range.makeSubRange(preludeStart, &range.peek());
    CSSParserTokenRange block = range.consumeBlock();

    if (allowedRules <= RegularRules)
        return consumeStyleRule(prelude, block);
    if (allowedRules == KeyframeRules)
        return consumeKeyframeStyleRule(prelude, block);

    ASSERT_NOT_REACHED();
    return nullptr;
}
Exemplo n.º 23
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PassRefPtrWillBeRawPtr<StyleRulePage> CSSParserImpl::consumePageRule(CSSParserTokenRange prelude, CSSParserTokenRange block)
{
    // We only support a small subset of the css-page spec.
    prelude.consumeWhitespace();
    AtomicString typeSelector;
    if (prelude.peek().type() == IdentToken)
        typeSelector = prelude.consume().value();

    AtomicString pseudo;
    if (prelude.peek().type() == ColonToken) {
        prelude.consume();
        if (prelude.peek().type() != IdentToken)
            return nullptr; // Parse error; expected ident token following colon in @page header
        pseudo = prelude.consume().value();
    }

    prelude.consumeWhitespace();
    if (!prelude.atEnd())
        return nullptr; // Parse error; extra tokens in @page header

    OwnPtr<CSSParserSelector> selector;
    if (!typeSelector.isNull() && pseudo.isNull()) {
        selector = CSSParserSelector::create(QualifiedName(nullAtom, typeSelector, m_defaultNamespace));
    } else {
        selector = CSSParserSelector::create();
        if (!pseudo.isNull()) {
            selector->setMatch(CSSSelector::PagePseudoClass);
            selector->setValue(pseudo.lower());
            if (selector->pseudoType() == CSSSelector::PseudoUnknown)
                return nullptr; // Parse error; unknown page pseudo-class
        }
        if (!typeSelector.isNull())
            selector->prependTagSelector(QualifiedName(nullAtom, typeSelector, m_defaultNamespace));
    }

    if (m_observerWrapper) {
        unsigned endOffset = m_observerWrapper->endOffset(prelude);
        m_observerWrapper->observer().startRuleHeader(StyleRule::Page, m_observerWrapper->startOffset(prelude));
        m_observerWrapper->observer().endRuleHeader(endOffset);
    }

    selector->setForPage();

    RefPtrWillBeRawPtr<StyleRulePage> pageRule = StyleRulePage::create();
    Vector<OwnPtr<CSSParserSelector>> selectorVector;
    selectorVector.append(selector.release());
    pageRule->parserAdoptSelectorVector(selectorVector);

    consumeDeclarationList(block, StyleRule::Style);
    pageRule->setProperties(createStylePropertySet(m_parsedProperties, m_context.mode()));
    m_parsedProperties.clear();

    return pageRule.release();
}
Exemplo n.º 24
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PassRefPtrWillBeRawPtr<StyleRuleBase> CSSParserImpl::parseRule(const String& string, const CSSParserContext& context, StyleSheetContents* styleSheet, AllowedRulesType allowedRules)
{
    CSSParserImpl parser(context, styleSheet);
    CSSTokenizer::Scope scope(string);
    CSSParserTokenRange range = scope.tokenRange();
    range.consumeWhitespace();
    if (range.atEnd())
        return nullptr; // Parse error, empty rule
    RefPtrWillBeRawPtr<StyleRuleBase> rule;
    if (range.peek().type() == AtKeywordToken)
        rule = parser.consumeAtRule(range, allowedRules);
    else
        rule = parser.consumeQualifiedRule(range, allowedRules);
    if (!rule)
        return nullptr; // Parse error, failed to consume rule
    range.consumeWhitespace();
    if (!rule || !range.atEnd())
        return nullptr; // Parse error, trailing garbage
    return rule;
}
Exemplo n.º 25
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void CSSSelectorParser::parseSelector(CSSParserTokenRange range, const CSSParserContext& context, const AtomicString& defaultNamespace, StyleSheetContents* styleSheet, CSSSelectorList& output)
{
    CSSSelectorParser parser(context, defaultNamespace, styleSheet);
    range.consumeWhitespace();
    CSSSelectorList result;
    parser.consumeComplexSelectorList(range, result);
    if (range.atEnd()) {
        output.adopt(result);
        recordSelectorStats(context, output);
    }
    ASSERT(!(output.isValid() && parser.m_failedParsing));
}
Exemplo n.º 26
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CSSSupportsParser::SupportsResult CSSSupportsParser::consumeNegation(
    CSSParserTokenRange range) {
  ASSERT(range.peek().type() == IdentToken);
  if (!equalIgnoringASCIICase(range.consume().value(), "not"))
    return Invalid;
  if (range.consumeIncludingWhitespace().type() != WhitespaceToken)
    return Invalid;
  SupportsResult result = consumeConditionInParenthesis(range);
  range.consumeWhitespace();
  if (!range.atEnd() || result == Invalid)
    return Invalid;
  return result ? Unsupported : Supported;
}
Exemplo n.º 27
0
CSSSelectorList CSSSelectorParser::parseSelector(
    CSSParserTokenRange range,
    const CSSParserContext& context,
    StyleSheetContents* styleSheet) {
  CSSSelectorParser parser(context, styleSheet);
  range.consumeWhitespace();
  CSSSelectorList result = parser.consumeComplexSelectorList(range);
  if (!range.atEnd())
    return CSSSelectorList();

  recordSelectorStats(context, result);
  return result;
}
Exemplo n.º 28
0
bool CSSParserImpl::consumeRuleList(CSSParserTokenRange range, RuleListType ruleListType, const T callback)
{
    AllowedRulesType allowedRules = RegularRules;
    switch (ruleListType) {
    case TopLevelRuleList:
        allowedRules = AllowCharsetRules;
        break;
    case RegularRuleList:
        allowedRules = RegularRules;
        break;
    case KeyframesRuleList:
        allowedRules = KeyframeRules;
        break;
    default:
        ASSERT_NOT_REACHED();
    }

    bool seenRule = false;
    bool firstRuleValid = false;
    while (!range.atEnd()) {
        RefPtrWillBeRawPtr<StyleRuleBase> rule;
        switch (range.peek().type()) {
        case WhitespaceToken:
            range.consumeWhitespace();
            continue;
        case AtKeywordToken:
            rule = consumeAtRule(range, allowedRules);
            break;
        case CDOToken:
        case CDCToken:
            if (ruleListType == TopLevelRuleList) {
                range.consume();
                continue;
            }
            // fallthrough
        default:
            rule = consumeQualifiedRule(range, allowedRules);
            break;
        }
        if (!seenRule) {
            seenRule = true;
            firstRuleValid = rule;
        }
        if (rule) {
            allowedRules = computeNewAllowedRules(allowedRules, rule.get());
            callback(rule.release());
        }
    }

    return firstRuleValid;
}
PassRefPtrWillBeRawPtr<CSSCustomPropertyDeclaration> CSSVariableParser::parseDeclarationValue(const AtomicString& variableName, CSSParserTokenRange range)
{
    if (range.atEnd())
        return nullptr;

    bool hasReferences;
    CSSValueID type = classifyVariableRange(range, hasReferences);

    if (type == CSSValueInvalid)
        return nullptr;
    if (type == CSSValueInternalVariableValue)
        return CSSCustomPropertyDeclaration::create(variableName, CSSVariableData::create(range, hasReferences));
    return CSSCustomPropertyDeclaration::create(variableName, type);
}
Exemplo n.º 30
0
PassRefPtrWillBeRawPtr<StyleRuleNamespace> CSSParserImpl::consumeNamespaceRule(CSSParserTokenRange prelude)
{
    prelude.consumeWhitespace();
    AtomicString namespacePrefix;
    if (prelude.peek().type() == IdentToken)
        namespacePrefix = prelude.consumeIncludingWhitespace().value();

    AtomicString uri(consumeStringOrURI(prelude));
    prelude.consumeWhitespace();
    if (uri.isNull() || !prelude.atEnd())
        return nullptr; // Parse error, expected string or URI

    return StyleRuleNamespace::create(namespacePrefix, uri);
}