1/*
2 * CSS Media Query
3 *
4 * Copyright (C) 2006 Kimmo Kinnunen <kimmo.t.kinnunen@nokia.com>.
5 * Copyright (C) 2010 Nokia Corporation and/or its subsidiary(-ies).
6 *
7 * Redistribution and use in source and binary forms, with or without
8 * modification, are permitted provided that the following conditions
9 * are met:
10 * 1. Redistributions of source code must retain the above copyright
11 *    notice, this list of conditions and the following disclaimer.
12 * 2. Redistributions in binary form must reproduce the above copyright
13 *    notice, this list of conditions and the following disclaimer in the
14 *    documentation and/or other materials provided with the distribution.
15 *
16 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY
17 * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
18 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
19 * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL APPLE COMPUTER, INC. OR
20 * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
21 * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
22 * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
23 * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY
24 * OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
25 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
26 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
27 */
28
29#include "config.h"
30#include "MediaQueryExp.h"
31
32#include "CSSParser.h"
33#include "CSSPrimitiveValue.h"
34#include "CSSValueList.h"
35#include <wtf/text/StringBuilder.h>
36
37namespace WebCore {
38
39inline MediaQueryExp::MediaQueryExp(const AtomicString& mediaFeature, CSSParserValueList* valueList)
40    : m_mediaFeature(mediaFeature)
41    , m_value(0)
42    , m_isValid(true)
43{
44    if (valueList) {
45        if (valueList->size() == 1) {
46            CSSParserValue* value = valueList->current();
47
48            if (value->id != 0)
49                m_value = CSSPrimitiveValue::createIdentifier(value->id);
50            else if (value->unit == CSSPrimitiveValue::CSS_STRING)
51                m_value = CSSPrimitiveValue::create(value->string, (CSSPrimitiveValue::UnitTypes) value->unit);
52            else if (value->unit >= CSSPrimitiveValue::CSS_NUMBER &&
53                      value->unit <= CSSPrimitiveValue::CSS_KHZ)
54                m_value = CSSPrimitiveValue::create(value->fValue, (CSSPrimitiveValue::UnitTypes) value->unit);
55
56            valueList->next();
57        } else if (valueList->size() > 1) {
58            // create list of values
59            // currently accepts only <integer>/<integer>
60
61            RefPtr<CSSValueList> list = CSSValueList::createCommaSeparated();
62            CSSParserValue* value = 0;
63            bool isValid = true;
64
65            while ((value = valueList->current()) && isValid) {
66                if (value->unit == CSSParserValue::Operator && value->iValue == '/')
67                    list->append(CSSPrimitiveValue::create("/", CSSPrimitiveValue::CSS_STRING));
68                else if (value->unit == CSSPrimitiveValue::CSS_NUMBER)
69                    list->append(CSSPrimitiveValue::create(value->fValue, CSSPrimitiveValue::CSS_NUMBER));
70                else
71                    isValid = false;
72
73                value = valueList->next();
74            }
75
76            if (isValid)
77                m_value = list.release();
78        }
79        m_isValid = m_value;
80    }
81}
82
83
84PassOwnPtr<MediaQueryExp> MediaQueryExp::create(const AtomicString& mediaFeature, CSSParserValueList* values)
85{
86    return adoptPtr(new MediaQueryExp(mediaFeature, values));
87}
88
89MediaQueryExp::~MediaQueryExp()
90{
91}
92
93String MediaQueryExp::serialize() const
94{
95    if (!m_serializationCache.isNull())
96        return m_serializationCache;
97
98    StringBuilder result;
99    result.append("(");
100    result.append(m_mediaFeature.lower());
101    if (m_value) {
102        result.append(": ");
103        result.append(m_value->cssText());
104    }
105    result.append(")");
106
107    const_cast<MediaQueryExp*>(this)->m_serializationCache = result.toString();
108    return m_serializationCache;
109}
110
111} // namespace
112