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/*
* (C) 1999-2003 Lars Knoll (knoll@kde.org)
* Copyright (C) 2004-2020 Apple Inc. All rights reserved.
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Library General Public
* License as published by the Free Software Foundation; either
* version 2 of the License, or (at your option) any later version.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Library General Public License for more details.
*
* You should have received a copy of the GNU Library General Public License
* along with this library; see the file COPYING.LIB. If not, write to
* the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
* Boston, MA 02110-1301, USA.
*/
#include "config.h"
#include "MediaList.h"
#include "CSSImportRule.h"
#include "CSSMediaRule.h"
#include "CSSStyleSheet.h"
#include "Document.h"
#include "LocalDOMWindow.h"
#include "MediaQuery.h"
#include "MediaQueryParser.h"
#include <wtf/NeverDestroyed.h>
#include <wtf/text/StringBuilder.h>
#include <wtf/text/TextStream.h>
namespace WebCore {
MediaList::MediaList(CSSStyleSheet* parentSheet)
: m_parentStyleSheet(parentSheet)
{
}
MediaList::MediaList(CSSRule* parentRule)
: m_parentRule(parentRule)
{
}
MediaList::~MediaList() = default;
void MediaList::detachFromParent()
{
m_detachedMediaQueries = mediaQueries();
m_parentStyleSheet = nullptr;
m_parentRule = nullptr;
}
unsigned MediaList::length() const
{
return mediaQueries().size();
}
const MQ::MediaQueryList& MediaList::mediaQueries() const
{
if (m_detachedMediaQueries)
return *m_detachedMediaQueries;
if (auto* rule = dynamicDowncast<CSSImportRule>(m_parentRule))
return rule->mediaQueries();
if (auto* rule = dynamicDowncast<CSSMediaRule>(m_parentRule))
return rule->mediaQueries();
return m_parentStyleSheet->mediaQueries();
}
void MediaList::setMediaQueries(MQ::MediaQueryList&& queries)
{
if (m_parentStyleSheet) {
m_parentStyleSheet->setMediaQueries(WTFMove(queries));
m_parentStyleSheet->didMutate();
return;
}
CSSStyleSheet::RuleMutationScope mutationScope(m_parentRule);
if (auto* rule = dynamicDowncast<CSSImportRule>(m_parentRule))
rule->setMediaQueries(WTFMove(queries));
if (auto* rule = dynamicDowncast<CSSMediaRule>(m_parentRule))
rule->setMediaQueries(WTFMove(queries));
}
String MediaList::mediaText() const
{
StringBuilder builder;
MQ::serialize(builder, mediaQueries());
return builder.toString();
}
void MediaList::setMediaText(const String& value)
{
setMediaQueries(MQ::MediaQueryParser::parse(value, { }));
}
String MediaList::item(unsigned index) const
{
auto& queries = mediaQueries();
if (index < queries.size()) {
StringBuilder builder;
MQ::serialize(builder, queries[index]);
return builder.toString();
}
return { };
}
ExceptionOr<void> MediaList::deleteMedium(const String& value)
{
auto valueToRemove = value.convertToASCIILowercase();
auto queries = mediaQueries();
for (unsigned i = 0; i < queries.size(); ++i) {
if (item(i) == valueToRemove) {
queries.remove(i);
setMediaQueries(WTFMove(queries));
return { };
}
}
return Exception { ExceptionCode::NotFoundError };
}
void MediaList::appendMedium(const String& value)
{
if (value.isEmpty())
return;
auto newQuery = MQ::MediaQueryParser::parse(value, { });
auto queries = mediaQueries();
queries.appendVector(newQuery);
setMediaQueries(WTFMove(queries));
}
TextStream& operator<<(TextStream& ts, const MediaList& mediaList)
{
ts << mediaList.mediaText();
return ts;
}
} // namespace WebCore
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