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, 2013 Apple Inc. All rights reserved.
6 * (C) 2007 Rob Buis (buis@kde.org)
7 *
8 * This library is free software; you can redistribute it and/or
9 * modify it under the terms of the GNU Library General Public
10 * License as published by the Free Software Foundation; either
11 * version 2 of the License, or (at your option) any later version.
12 *
13 * This library is distributed in the hope that it will be useful,
14 * but WITHOUT ANY WARRANTY; without even the implied warranty of
15 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
16 * Library General Public License for more details.
17 *
18 * You should have received a copy of the GNU Library General Public License
19 * along with this library; see the file COPYING.LIB. If not, write to
20 * the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
21 * Boston, MA 02110-1301, USA.
22 */
23
24#include "config.h"
25#include "HTMLStyleElement.h"
26
27#include "CachedResource.h"
28#include "Document.h"
29#include "Event.h"
30#include "EventNames.h"
31#include "EventSender.h"
32#include "HTMLNames.h"
33#include "MediaList.h"
34#include "MediaQueryParser.h"
35#include "RuntimeEnabledFeatures.h"
36#include "ScriptableDocumentParser.h"
37#include "ShadowRoot.h"
38#include "StyleScope.h"
39#include "StyleSheetContents.h"
40#include <wtf/IsoMallocInlines.h>
41#include <wtf/NeverDestroyed.h>
42
43namespace WebCore {
44
45WTF_MAKE_ISO_ALLOCATED_IMPL(HTMLStyleElement);
46
47using namespace HTMLNames;
48
49static StyleEventSender& styleLoadEventSender()
50{
51 static NeverDestroyed<StyleEventSender> sharedLoadEventSender(eventNames().loadEvent);
52 return sharedLoadEventSender;
53}
54
55inline HTMLStyleElement::HTMLStyleElement(const QualifiedName& tagName, Document& document, bool createdByParser)
56 : HTMLElement(tagName, document)
57 , m_styleSheetOwner(document, createdByParser)
58{
59 ASSERT(hasTagName(styleTag));
60}
61
62HTMLStyleElement::~HTMLStyleElement()
63{
64 m_styleSheetOwner.clearDocumentData(*this);
65
66 styleLoadEventSender().cancelEvent(*this);
67}
68
69Ref<HTMLStyleElement> HTMLStyleElement::create(const QualifiedName& tagName, Document& document, bool createdByParser)
70{
71 return adoptRef(*new HTMLStyleElement(tagName, document, createdByParser));
72}
73
74Ref<HTMLStyleElement> HTMLStyleElement::create(Document& document)
75{
76 return adoptRef(*new HTMLStyleElement(styleTag, document, false));
77}
78
79void HTMLStyleElement::parseAttribute(const QualifiedName& name, const AtomicString& value)
80{
81 if (name == titleAttr && sheet() && !isInShadowTree())
82 sheet()->setTitle(value);
83 else if (name == mediaAttr) {
84 m_styleSheetOwner.setMedia(value);
85 if (sheet()) {
86 sheet()->setMediaQueries(MediaQuerySet::create(value, MediaQueryParserContext(document())));
87 if (auto* scope = m_styleSheetOwner.styleScope())
88 scope->didChangeStyleSheetContents();
89 } else
90 m_styleSheetOwner.childrenChanged(*this);
91 } else if (name == typeAttr)
92 m_styleSheetOwner.setContentType(value);
93 else
94 HTMLElement::parseAttribute(name, value);
95}
96
97void HTMLStyleElement::finishParsingChildren()
98{
99 m_styleSheetOwner.finishParsingChildren(*this);
100 HTMLElement::finishParsingChildren();
101}
102
103Node::InsertedIntoAncestorResult HTMLStyleElement::insertedIntoAncestor(InsertionType insertionType, ContainerNode& parentOfInsertedTree)
104{
105 auto result = HTMLElement::insertedIntoAncestor(insertionType, parentOfInsertedTree);
106 if (insertionType.connectedToDocument)
107 m_styleSheetOwner.insertedIntoDocument(*this);
108 return result;
109}
110
111void HTMLStyleElement::removedFromAncestor(RemovalType removalType, ContainerNode& oldParentOfRemovedTree)
112{
113 HTMLElement::removedFromAncestor(removalType, oldParentOfRemovedTree);
114 if (removalType.disconnectedFromDocument)
115 m_styleSheetOwner.removedFromDocument(*this);
116}
117
118void HTMLStyleElement::childrenChanged(const ChildChange& change)
119{
120 HTMLElement::childrenChanged(change);
121 m_styleSheetOwner.childrenChanged(*this);
122}
123
124void HTMLStyleElement::dispatchPendingLoadEvents()
125{
126 styleLoadEventSender().dispatchPendingEvents();
127}
128
129void HTMLStyleElement::dispatchPendingEvent(StyleEventSender* eventSender)
130{
131 ASSERT_UNUSED(eventSender, eventSender == &styleLoadEventSender());
132 if (m_loadedSheet)
133 dispatchEvent(Event::create(eventNames().loadEvent, Event::CanBubble::No, Event::IsCancelable::No));
134 else
135 dispatchEvent(Event::create(eventNames().errorEvent, Event::CanBubble::No, Event::IsCancelable::No));
136}
137
138void HTMLStyleElement::notifyLoadedSheetAndAllCriticalSubresources(bool errorOccurred)
139{
140 if (m_firedLoad)
141 return;
142 m_loadedSheet = !errorOccurred;
143 styleLoadEventSender().dispatchEventSoon(*this);
144 m_firedLoad = true;
145}
146
147void HTMLStyleElement::addSubresourceAttributeURLs(ListHashSet<URL>& urls) const
148{
149 HTMLElement::addSubresourceAttributeURLs(urls);
150
151 if (auto styleSheet = makeRefPtr(this->sheet())) {
152 styleSheet->contents().traverseSubresources([&] (auto& resource) {
153 urls.add(resource.url());
154 return false;
155 });
156 }
157}
158
159bool HTMLStyleElement::disabled() const
160{
161 if (!sheet())
162 return false;
163
164 return sheet()->disabled();
165}
166
167void HTMLStyleElement::setDisabled(bool setDisabled)
168{
169 if (CSSStyleSheet* styleSheet = sheet())
170 styleSheet->setDisabled(setDisabled);
171}
172
173}
174