Source/WebCore/css/DOMCSSNamespace.cpp

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 * Copyright (C) 2012 Motorola Mobility Inc. All rights reserved.
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#include "config.h"
#include "DOMCSSNamespace.h"

#include "CSSMarkup.h"
#include "CSSParser.h"
#include "CSSPropertyNames.h"
#include "CSSPropertyParser.h"
#include "CSSSupportsParser.h"
#include "Document.h"
#include "HighlightRegistry.h"
#include "MutableStyleProperties.h"
#include "StyleProperties.h"
#include <wtf/text/StringBuilder.h>
#include <wtf/text/WTFString.h>

namespace WebCore {

bool DOMCSSNamespace::supports(Document& document, const String& property, const String& value)
{
    CSSParserContext parserContext(document);
    parserContext.mode = HTMLStandardMode;

    auto propertyNameWithoutWhitespace = property;
    CSSPropertyID propertyID = cssPropertyID(propertyNameWithoutWhitespace);
    if (propertyID == CSSPropertyInvalid && isCustomPropertyName(propertyNameWithoutWhitespace)) {
        auto dummyStyle = MutableStyleProperties::create();
        return CSSParser::parseCustomPropertyValue(dummyStyle, AtomString { propertyNameWithoutWhitespace }, value, IsImportant::No, parserContext) != CSSParser::ParseResult::Error;
    }

    if (!isExposed(propertyID, &document.settings()))
        return false;

    if (CSSProperty::isDescriptorOnly(propertyID))
        return false;

    if (propertyID == CSSPropertyInvalid)
        return false;

    if (value.isEmpty())
        return false;

    auto dummyStyle = MutableStyleProperties::create();
    return CSSParser::parseValue(dummyStyle, propertyID, value, IsImportant::No, parserContext) != CSSParser::ParseResult::Error;
}

bool DOMCSSNamespace::supports(Document& document, const String& conditionText)
{
    CSSParserContext context(document);
    context.mode = HTMLStandardMode;

    return CSSSupportsParser::supportsCondition(conditionText, context, CSSSupportsParser::ParsingMode::AllowBareDeclarationAndGeneralEnclosed) == CSSSupportsParser::Supported;
}

String DOMCSSNamespace::escape(const String& ident)
{
    StringBuilder builder;
    serializeIdentifier(ident, builder);
    return builder.toString();
}

HighlightRegistry& DOMCSSNamespace::highlights(Document& document)
{
    return document.highlightRegistry();
}

}