blob: 91af51d9b4d94c4f97fcdcee9fcb4f54f827f23b [file] [log] [blame]
/*
* CSS Media Query
*
* Copyright (C) 2005, 2006 Kimmo Kinnunen <kimmo.t.kinnunen@nokia.com>.
* Copyright (C) 2010 Nokia Corporation and/or its subsidiary(-ies).
*
* 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 THE AUTHOR ``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
* 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 "MediaQuery.h"
#include <wtf/text/StringBuilder.h>
#include <wtf/text/TextStream.h>
namespace WebCore {
// http://dev.w3.org/csswg/cssom/#serialize-a-media-query
String MediaQuery::serialize() const
{
if (m_ignored) {
// If query is invalid, serialized text should turn into "not all".
return "not all"_s;
}
bool shouldOmitMediaType = false;
StringBuilder result;
switch (m_restrictor) {
case MediaQuery::Only:
result.append("only ");
break;
case MediaQuery::Not:
result.append("not ");
break;
case MediaQuery::None:
shouldOmitMediaType = !m_expressions.isEmpty() && m_mediaType == "all"_s;
break;
}
bool needsAnd = false;
if (!shouldOmitMediaType) {
result.append(m_mediaType);
needsAnd = true;
}
for (auto& expression : m_expressions) {
if (needsAnd)
result.append(" and ");
result.append(expression.serialize());
needsAnd = true;
}
return result.toString();
}
MediaQuery::MediaQuery(Restrictor restrictor, const String& mediaType, Vector<MediaQueryExpression>&& expressions)
: m_mediaType(mediaType.convertToASCIILowercase())
, m_expressions(WTFMove(expressions))
, m_restrictor(restrictor)
{
}
// http://dev.w3.org/csswg/cssom/#compare-media-queries
bool MediaQuery::operator==(const MediaQuery& other) const
{
return cssText() == other.cssText();
}
// http://dev.w3.org/csswg/cssom/#serialize-a-list-of-media-queries
const String& MediaQuery::cssText() const
{
if (m_serializationCache.isNull())
m_serializationCache = serialize();
return m_serializationCache;
}
TextStream& operator<<(TextStream& ts, const MediaQuery& query)
{
ts << query.cssText();
return ts;
}
} //namespace