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
37 namespace WebCore {
38
MediaQueryExp(const AtomicString & mediaFeature,CSSParserValueList * valueList)39 inline 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
create(const AtomicString & mediaFeature,CSSParserValueList * values)84 PassOwnPtr<MediaQueryExp> MediaQueryExp::create(const AtomicString& mediaFeature, CSSParserValueList* values)
85 {
86 return adoptPtr(new MediaQueryExp(mediaFeature, values));
87 }
88
~MediaQueryExp()89 MediaQueryExp::~MediaQueryExp()
90 {
91 }
92
serialize() const93 String 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