blob: 800787213d33b07239d1182c74359e49c65c186b [file] [log] [blame]
/*
* Copyright (C) 2012 Motorola Mobility 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.
* 3. Neither the name of Motorola Mobility Inc. nor the names of its
* contributors may be used to endorse or promote products derived from this
* software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND 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 THE COPYRIGHT
* OWNER OR 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.
*/
#include "config.h"
#include "DOMCSSNamespace.h"
#include "CSSMarkup.h"
#include "CSSParser.h"
#include "CSSPropertyParser.h"
#include "Document.h"
#include "HighlightRegister.h"
#include "StyleProperties.h"
#include <wtf/text/StringBuilder.h>
#include <wtf/text/WTFString.h>
namespace WebCore {
static String valueWithoutImportant(const String& value)
{
if (!value.endsWithIgnoringASCIICase("important"_s))
return value;
String newValue = value;
int bangIndex = newValue.length() - 9 - 1;
if (newValue[bangIndex] == ' ')
bangIndex--;
newValue = newValue.left(bangIndex);
return newValue;
}
bool DOMCSSNamespace::supports(Document& document, const String& property, const String& value)
{
CSSPropertyID propertyID = cssPropertyID(property.stripWhiteSpace());
CSSParserContext parserContext(document);
if (parserContext.isPropertyRuntimeDisabled(propertyID))
return false;
if (isInternalCSSProperty(propertyID))
return false;
if (propertyID == CSSPropertyInvalid)
return false;
// CSSParser::parseValue() won't work correctly if !important is present,
// so just get rid of it. It doesn't matter to supports() if it's actually
// there or not, provided how it's specified in the value is correct.
String normalizedValue = value.stripWhiteSpace().simplifyWhiteSpace();
normalizedValue = valueWithoutImportant(normalizedValue);
if (normalizedValue.isEmpty())
return false;
auto dummyStyle = MutableStyleProperties::create();
return CSSParser::parseValue(dummyStyle, propertyID, normalizedValue, false, parserContext) != CSSParser::ParseResult::Error;
}
bool DOMCSSNamespace::supports(Document& document, const String& conditionText)
{
CSSParserContext context(document);
CSSParser parser(context);
return parser.parseSupportsCondition(conditionText);
}
String DOMCSSNamespace::escape(const String& ident)
{
StringBuilder builder;
serializeIdentifier(ident, builder);
return builder.toString();
}
HighlightRegister& DOMCSSNamespace::highlights(Document& document)
{
return document.highlightRegister();
}
}