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/*
* CSS Media Query
*
* Copyright (C) 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.
*/
#ifndef THIRD_PARTY_BLINK_RENDERER_CORE_CSS_MEDIA_QUERY_H_
#define THIRD_PARTY_BLINK_RENDERER_CORE_CSS_MEDIA_QUERY_H_
#include "third_party/blink/renderer/core/core_export.h"
#include "third_party/blink/renderer/core/layout/geometry/axis.h"
#include "third_party/blink/renderer/platform/heap/garbage_collected.h"
#include "third_party/blink/renderer/platform/heap/member.h"
#include "third_party/blink/renderer/platform/heap/visitor.h"
#include "third_party/blink/renderer/platform/wtf/allocator/allocator.h"
#include "third_party/blink/renderer/platform/wtf/text/string_hash.h"
#include "third_party/blink/renderer/platform/wtf/text/wtf_string.h"
#include "third_party/blink/renderer/platform/wtf/vector.h"
namespace blink {
class MediaQueryExp;
class MediaQueryExpNode;
using ExpressionHeapVector = Vector<MediaQueryExp>;
class CORE_EXPORT MediaQuery : public GarbageCollected<MediaQuery> {
public:
enum class RestrictorType : uint8_t { kOnly, kNot, kNone };
static MediaQuery* CreateNotAll();
MediaQuery(RestrictorType, String media_type, const MediaQueryExpNode*);
MediaQuery(const MediaQuery&);
MediaQuery& operator=(const MediaQuery&) = delete;
~MediaQuery();
void Trace(Visitor*) const;
bool HasUnknown() const { return has_unknown_; }
RestrictorType Restrictor() const;
const MediaQueryExpNode* ExpNode() const;
const String& MediaType() const;
bool operator==(const MediaQuery& other) const;
String CssText() const;
private:
String media_type_;
String serialization_cache_;
Member<const MediaQueryExpNode> exp_node_;
RestrictorType restrictor_;
// Set if |exp_node_| contains any MediaQueryUnknownExpNode instances.
//
// If the runtime flag CSSMediaQueries4 is *not* enabled, this will cause the
// MediaQuery to appear as a "not all".
//
// Knowing whether or not something is unknown is useful for use-counting and
// testing purposes.
bool has_unknown_;
String Serialize() const;
};
} // namespace blink
#endif // THIRD_PARTY_BLINK_RENDERER_CORE_CSS_MEDIA_QUERY_H_
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