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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_EXP_H_
#define THIRD_PARTY_BLINK_RENDERER_CORE_CSS_MEDIA_QUERY_EXP_H_
#include "third_party/blink/renderer/core/core_export.h"
#include "third_party/blink/renderer/core/css/css_primitive_value.h"
#include "third_party/blink/renderer/core/css/css_value.h"
#include "third_party/blink/renderer/core/css/media_feature_names.h"
#include "third_party/blink/renderer/core/css_value_keywords.h"
#include "third_party/blink/renderer/platform/wtf/allocator/allocator.h"
namespace blink {
class CSSParserContext;
class CSSParserTokenRange;
class ExecutionContext;
struct MediaQueryExpValue {
DISALLOW_NEW();
CSSValueID id;
double value;
CSSPrimitiveValue::UnitType unit;
unsigned numerator;
unsigned denominator;
bool is_id;
bool is_value;
bool is_ratio;
MediaQueryExpValue()
: id(CSSValueID::kInvalid),
value(0),
unit(CSSPrimitiveValue::UnitType::kUnknown),
numerator(0),
denominator(1),
is_id(false),
is_value(false),
is_ratio(false) {}
bool IsValid() const { return (is_id || is_value || is_ratio); }
String CssText() const;
bool Equals(const MediaQueryExpValue& exp_value) const {
if (is_id)
return (id == exp_value.id);
if (is_value)
return (value == exp_value.value);
if (is_ratio)
return (numerator == exp_value.numerator &&
denominator == exp_value.denominator);
return !exp_value.IsValid();
}
};
class CORE_EXPORT MediaQueryExp {
DISALLOW_NEW();
public:
// Returns an invalid MediaQueryExp if the arguments are invalid.
static MediaQueryExp Create(const String& media_feature,
CSSParserTokenRange&,
const CSSParserContext&,
const ExecutionContext*);
static MediaQueryExp Invalid() {
return MediaQueryExp(String(), MediaQueryExpValue());
}
MediaQueryExp(const MediaQueryExp& other);
~MediaQueryExp();
const String& MediaFeature() const { return media_feature_; }
MediaQueryExpValue ExpValue() const { return exp_value_; }
bool IsValid() const { return !media_feature_.IsNull(); }
bool operator==(const MediaQueryExp& other) const;
bool IsViewportDependent() const;
bool IsDeviceDependent() const;
String Serialize() const;
private:
MediaQueryExp(const String&, const MediaQueryExpValue&);
String media_feature_;
MediaQueryExpValue exp_value_;
};
} // namespace blink
#endif
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