1/*
2 * Copyright (C) 1999 Lars Knoll (knoll@kde.org)
3 * (C) 1999 Antti Koivisto (koivisto@kde.org)
4 * (C) 2001 Dirk Mueller (mueller@kde.org)
5 * Copyright (C) 2003, 2010 Apple Inc. All rights reserved.
6 *
7 * This library is free software; you can redistribute it and/or
8 * modify it under the terms of the GNU Library General Public
9 * License as published by the Free Software Foundation; either
10 * version 2 of the License, or (at your option) any later version.
11 *
12 * This library is distributed in the hope that it will be useful,
13 * but WITHOUT ANY WARRANTY; without even the implied warranty of
14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
15 * Library General Public License for more details.
16 *
17 * You should have received a copy of the GNU Library General Public License
18 * along with this library; see the file COPYING.LIB. If not, write to
19 * the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
20 * Boston, MA 02110-1301, USA.
21 */
22
23#include "config.h"
24#include "HTMLMetaElement.h"
25
26#include "Attribute.h"
27#include "Document.h"
28#include "HTMLHeadElement.h"
29#include "HTMLNames.h"
30#include "RuntimeEnabledFeatures.h"
31#include <wtf/IsoMallocInlines.h>
32
33namespace WebCore {
34
35WTF_MAKE_ISO_ALLOCATED_IMPL(HTMLMetaElement);
36
37using namespace HTMLNames;
38
39inline HTMLMetaElement::HTMLMetaElement(const QualifiedName& tagName, Document& document)
40 : HTMLElement(tagName, document)
41{
42 ASSERT(hasTagName(metaTag));
43}
44
45Ref<HTMLMetaElement> HTMLMetaElement::create(Document& document)
46{
47 return adoptRef(*new HTMLMetaElement(metaTag, document));
48}
49
50Ref<HTMLMetaElement> HTMLMetaElement::create(const QualifiedName& tagName, Document& document)
51{
52 return adoptRef(*new HTMLMetaElement(tagName, document));
53}
54
55void HTMLMetaElement::parseAttribute(const QualifiedName& name, const AtomicString& value)
56{
57 if (name == http_equivAttr)
58 process();
59 else if (name == contentAttr)
60 process();
61 else if (name == nameAttr) {
62 // Do nothing
63 } else
64 HTMLElement::parseAttribute(name, value);
65}
66
67Node::InsertedIntoAncestorResult HTMLMetaElement::insertedIntoAncestor(InsertionType insertionType, ContainerNode& parentOfInsertedTree)
68{
69 HTMLElement::insertedIntoAncestor(insertionType, parentOfInsertedTree);
70 if (insertionType.connectedToDocument)
71 return InsertedIntoAncestorResult::NeedsPostInsertionCallback;
72 return InsertedIntoAncestorResult::Done;
73}
74
75void HTMLMetaElement::didFinishInsertingNode()
76{
77 process();
78}
79
80void HTMLMetaElement::process()
81{
82 // Changing a meta tag while it's not in the tree shouldn't have any effect on the document.
83 if (!isConnected())
84 return;
85
86 const AtomicString& contentValue = attributeWithoutSynchronization(contentAttr);
87 if (contentValue.isNull())
88 return;
89
90 if (equalLettersIgnoringASCIICase(name(), "viewport"))
91 document().processViewport(contentValue, ViewportArguments::ViewportMeta);
92 else if (RuntimeEnabledFeatures::sharedFeatures().disabledAdaptationsMetaTagEnabled() && equalLettersIgnoringASCIICase(name(), "disabled-adaptations"))
93 document().processDisabledAdaptations(contentValue);
94#if ENABLE(DARK_MODE_CSS)
95 else if (RuntimeEnabledFeatures::sharedFeatures().darkModeCSSEnabled() && (equalLettersIgnoringASCIICase(name(), "color-scheme") || equalLettersIgnoringASCIICase(name(), "supported-color-schemes")))
96 document().processColorScheme(contentValue);
97#endif
98#if PLATFORM(IOS_FAMILY)
99 else if (equalLettersIgnoringASCIICase(name(), "format-detection"))
100 document().processFormatDetection(contentValue);
101 else if (equalLettersIgnoringASCIICase(name(), "apple-mobile-web-app-orientations"))
102 document().processWebAppOrientations();
103#endif
104 else if (equalLettersIgnoringASCIICase(name(), "referrer"))
105 document().processReferrerPolicy(contentValue, ReferrerPolicySource::MetaTag);
106
107 const AtomicString& httpEquivValue = attributeWithoutSynchronization(http_equivAttr);
108 if (!httpEquivValue.isNull())
109 document().processHttpEquiv(httpEquivValue, contentValue, isDescendantOf(document().head()));
110}
111
112const AtomicString& HTMLMetaElement::content() const
113{
114 return attributeWithoutSynchronization(contentAttr);
115}
116
117const AtomicString& HTMLMetaElement::httpEquiv() const
118{
119 return attributeWithoutSynchronization(http_equivAttr);
120}
121
122const AtomicString& HTMLMetaElement::name() const
123{
124 return getNameAttribute();
125}
126
127}
128