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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 #include "config.h"
     29 #include "MediaQueryExp.h"
     30 
     31 #include "CSSParser.h"
     32 #include "CSSPrimitiveValue.h"
     33 #include "CSSValueList.h"
     34 
     35 namespace WebCore {
     36 
     37 MediaQueryExp::MediaQueryExp(const AtomicString& mediaFeature, CSSParserValueList* valueList)
     38     : m_mediaFeature(mediaFeature)
     39     , m_value(0)
     40 {
     41     if (valueList) {
     42         if (valueList->size() == 1) {
     43             CSSParserValue* value = valueList->current();
     44 
     45             if (value->id != 0)
     46                 m_value = CSSPrimitiveValue::createIdentifier(value->id);
     47             else if (value->unit == CSSPrimitiveValue::CSS_STRING)
     48                 m_value = CSSPrimitiveValue::create(value->string, (CSSPrimitiveValue::UnitTypes) value->unit);
     49             else if (value->unit >= CSSPrimitiveValue::CSS_NUMBER &&
     50                       value->unit <= CSSPrimitiveValue::CSS_KHZ)
     51                 m_value = CSSPrimitiveValue::create(value->fValue, (CSSPrimitiveValue::UnitTypes) value->unit);
     52 
     53             valueList->next();
     54         } else if (valueList->size() > 1) {
     55             // create list of values
     56             // currently accepts only <integer>/<integer>
     57 
     58             RefPtr<CSSValueList> list = CSSValueList::createCommaSeparated();
     59             CSSParserValue* value = 0;
     60             bool isValid = true;
     61 
     62             while ((value = valueList->current()) && isValid) {
     63                 if (value->unit == CSSParserValue::Operator && value->iValue == '/')
     64                     list->append(CSSPrimitiveValue::create("/", CSSPrimitiveValue::CSS_STRING));
     65                 else if (value->unit == CSSPrimitiveValue::CSS_NUMBER)
     66                     list->append(CSSPrimitiveValue::create(value->fValue, CSSPrimitiveValue::CSS_NUMBER));
     67                 else
     68                     isValid = false;
     69 
     70                 value = valueList->next();
     71             }
     72 
     73             if (isValid)
     74                 m_value = list.release();
     75         }
     76     }
     77 }
     78 
     79 MediaQueryExp::~MediaQueryExp()
     80 {
     81 }
     82 
     83 } // namespace
     84