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      1 /*
      2  * CSS Media Query
      3  *
      4  * Copyright (C) 2006 Kimmo Kinnunen <kimmo.t.kinnunen (at) nokia.com>.
      5  *
      6  * Redistribution and use in source and binary forms, with or without
      7  * modification, are permitted provided that the following conditions
      8  * are met:
      9  * 1. Redistributions of source code must retain the above copyright
     10  *    notice, this list of conditions and the following disclaimer.
     11  * 2. Redistributions in binary form must reproduce the above copyright
     12  *    notice, this list of conditions and the following disclaimer in the
     13  *    documentation and/or other materials provided with the distribution.
     14  *
     15  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY
     16  * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
     17  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
     18  * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL APPLE COMPUTER, INC. OR
     19  * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
     20  * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
     21  * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
     22  * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY
     23  * OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
     24  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
     25  * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
     26  */
     27 
     28 #ifndef MediaQueryExp_h
     29 #define MediaQueryExp_h
     30 
     31 #include "AtomicString.h"
     32 #include "CSSValue.h"
     33 #include "MediaFeatureNames.h"
     34 #include <wtf/RefPtr.h>
     35 
     36 namespace WebCore {
     37 class CSSParserValueList;
     38 
     39 class MediaQueryExp : public FastAllocBase {
     40 public:
     41     MediaQueryExp(const AtomicString& mediaFeature, CSSParserValueList* values);
     42     ~MediaQueryExp();
     43 
     44     AtomicString mediaFeature() const { return m_mediaFeature; }
     45 
     46     CSSValue* value() const { return m_value.get(); }
     47 
     48     bool operator==(const MediaQueryExp& other) const
     49     {
     50         return (other.m_mediaFeature == m_mediaFeature)
     51             && ((!other.m_value && !m_value)
     52                 || (other.m_value && m_value && other.m_value->cssText() == m_value->cssText()));
     53     }
     54 
     55     bool isViewportDependent() const { return m_mediaFeature == MediaFeatureNames::widthMediaFeature ||
     56                                               m_mediaFeature == MediaFeatureNames::heightMediaFeature ||
     57                                               m_mediaFeature == MediaFeatureNames::min_widthMediaFeature ||
     58                                               m_mediaFeature == MediaFeatureNames::min_heightMediaFeature ||
     59                                               m_mediaFeature == MediaFeatureNames::max_widthMediaFeature ||
     60                                               m_mediaFeature == MediaFeatureNames::max_heightMediaFeature ||
     61                                               m_mediaFeature == MediaFeatureNames::orientationMediaFeature ||
     62                                               m_mediaFeature == MediaFeatureNames::aspect_ratioMediaFeature ||
     63                                               m_mediaFeature == MediaFeatureNames::min_aspect_ratioMediaFeature ||
     64                                               m_mediaFeature == MediaFeatureNames::max_aspect_ratioMediaFeature;  }
     65 private:
     66     AtomicString m_mediaFeature;
     67     RefPtr<CSSValue> m_value;
     68 };
     69 
     70 } // namespace
     71 
     72 #endif
     73