Upstream version 9.38.198.0
[platform/framework/web/crosswalk.git] / src / third_party / WebKit / Source / core / css / CSSViewportRule.cpp
1 /*
2  * Copyright (C) 2012 Intel Corporation. All rights reserved.
3  * Copyright (C) 2012 Apple Inc. All rights reserved.
4  *
5  * Redistribution and use in source and binary forms, with or without
6  * modification, are permitted provided that the following conditions
7  * are met:
8  *
9  * 1. Redistributions of source code must retain the above
10  *    copyright notice, this list of conditions and the following
11  *    disclaimer.
12  * 2. Redistributions in binary form must reproduce the above
13  *    copyright notice, this list of conditions and the following
14  *    disclaimer in the documentation and/or other materials
15  *    provided with the distribution.
16  *
17  * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDER “AS IS” AND ANY
18  * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
19  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
20  * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER BE
21  * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY,
22  * OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
23  * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
24  * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
25  * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR
26  * TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF
27  * THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
28  * SUCH DAMAGE.
29  */
30
31 #include "config.h"
32 #include "core/css/CSSViewportRule.h"
33
34 #include "core/css/PropertySetCSSStyleDeclaration.h"
35 #include "core/css/StylePropertySet.h"
36 #include "core/css/StyleRule.h"
37 #include "wtf/text/StringBuilder.h"
38
39 namespace blink {
40
41 CSSViewportRule::CSSViewportRule(StyleRuleViewport* viewportRule, CSSStyleSheet* sheet)
42     : CSSRule(sheet)
43     , m_viewportRule(viewportRule)
44 {
45 }
46
47 CSSViewportRule::~CSSViewportRule()
48 {
49 #if !ENABLE(OILPAN)
50     if (m_propertiesCSSOMWrapper)
51         m_propertiesCSSOMWrapper->clearParentRule();
52 #endif
53 }
54
55 CSSStyleDeclaration* CSSViewportRule::style() const
56 {
57     if (!m_propertiesCSSOMWrapper)
58         m_propertiesCSSOMWrapper = StyleRuleCSSStyleDeclaration::create(m_viewportRule->mutableProperties(), const_cast<CSSViewportRule*>(this));
59
60     return m_propertiesCSSOMWrapper.get();
61 }
62
63 String CSSViewportRule::cssText() const
64 {
65     StringBuilder result;
66     result.appendLiteral("@viewport { ");
67
68     String decls = m_viewportRule->properties().asText();
69     result.append(decls);
70     if (!decls.isEmpty())
71         result.append(' ');
72
73     result.append('}');
74
75     return result.toString();
76 }
77
78 void CSSViewportRule::reattach(StyleRuleBase* rule)
79 {
80     ASSERT(rule);
81     m_viewportRule = toStyleRuleViewport(rule);
82     if (m_propertiesCSSOMWrapper)
83         m_propertiesCSSOMWrapper->reattach(m_viewportRule->mutableProperties());
84 }
85
86 void CSSViewportRule::trace(Visitor* visitor)
87 {
88     visitor->trace(m_viewportRule);
89     visitor->trace(m_propertiesCSSOMWrapper);
90     CSSRule::trace(visitor);
91 }
92
93 } // namespace blink