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/*
* 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 COMPUTER, 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 "third_party/blink/renderer/core/css/media_query.h"
#include <algorithm>
#include <memory>
#include "third_party/blink/renderer/core/css/media_query_exp.h"
#include "third_party/blink/renderer/core/html/parser/html_parser_idioms.h"
#include "third_party/blink/renderer/core/media_type_names.h"
#include "third_party/blink/renderer/platform/wtf/text/string_builder.h"
namespace blink {
// https://drafts.csswg.org/cssom/#serialize-a-media-query
String MediaQuery::Serialize() const {
StringBuilder result;
switch (Restrictor()) {
case RestrictorType::kOnly:
result.Append("only ");
break;
case RestrictorType::kNot:
result.Append("not ");
break;
case RestrictorType::kNone:
break;
}
const MediaQueryExpNode* exp_node = ExpNode();
if (!exp_node) {
result.Append(MediaType());
return result.ReleaseString();
}
if (MediaType() != media_type_names::kAll ||
Restrictor() != RestrictorType::kNone) {
result.Append(MediaType());
result.Append(" and ");
}
if (exp_node) {
result.Append(exp_node->Serialize());
}
return result.ReleaseString();
}
MediaQuery* MediaQuery::CreateNotAll() {
return MakeGarbageCollected<MediaQuery>(
RestrictorType::kNot, media_type_names::kAll, nullptr /* exp_node */);
}
MediaQuery::MediaQuery(RestrictorType restrictor,
String media_type,
const MediaQueryExpNode* exp_node)
: media_type_(AttemptStaticStringCreation(media_type.LowerASCII())),
exp_node_(exp_node),
restrictor_(restrictor),
has_unknown_(exp_node_ && exp_node_->HasUnknown()) {}
MediaQuery::MediaQuery(const MediaQuery& o)
: media_type_(o.media_type_),
serialization_cache_(o.serialization_cache_),
exp_node_(o.exp_node_),
restrictor_(o.restrictor_),
has_unknown_(o.has_unknown_) {}
MediaQuery::~MediaQuery() = default;
void MediaQuery::Trace(Visitor* visitor) const {
visitor->Trace(exp_node_);
}
MediaQuery::RestrictorType MediaQuery::Restrictor() const {
return restrictor_;
}
const MediaQueryExpNode* MediaQuery::ExpNode() const {
return exp_node_.Get();
}
const String& MediaQuery::MediaType() const {
return media_type_;
}
// https://drafts.csswg.org/cssom/#compare-media-queries
bool MediaQuery::operator==(const MediaQuery& other) const {
return CssText() == other.CssText();
}
// https://drafts.csswg.org/cssom/#serialize-a-list-of-media-queries
String MediaQuery::CssText() const {
if (serialization_cache_.IsNull()) {
const_cast<MediaQuery*>(this)->serialization_cache_ = Serialize();
}
return serialization_cache_;
}
} // namespace blink
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