1 | /* |
2 | * Copyright (C) 2000 Peter Kelly (pmk@post.com) |
3 | * Copyright (C) 2006-2018 Apple Inc. All rights reserved. |
4 | * Copyright (C) 2013 Samsung Electronics. All rights reserved. |
5 | * |
6 | * This library is free software; you can redistribute it and/or |
7 | * modify it under the terms of the GNU Library General Public |
8 | * License as published by the Free Software Foundation; either |
9 | * version 2 of the License, or (at your option) any later version. |
10 | * |
11 | * This library is distributed in the hope that it will be useful, |
12 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
13 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
14 | * Library General Public License for more details. |
15 | * |
16 | * You should have received a copy of the GNU Library General Public License |
17 | * along with this library; see the file COPYING.LIB. If not, write to |
18 | * the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, |
19 | * Boston, MA 02110-1301, USA. |
20 | */ |
21 | |
22 | #include "config.h" |
23 | #include "ProcessingInstruction.h" |
24 | |
25 | #include "CSSStyleSheet.h" |
26 | #include "CachedCSSStyleSheet.h" |
27 | #include "CachedResourceLoader.h" |
28 | #include "CachedResourceRequest.h" |
29 | #include "CachedXSLStyleSheet.h" |
30 | #include "Document.h" |
31 | #include "Frame.h" |
32 | #include "FrameLoader.h" |
33 | #include "MediaList.h" |
34 | #include "MediaQueryParser.h" |
35 | #include "StyleScope.h" |
36 | #include "StyleSheetContents.h" |
37 | #include "XMLDocumentParser.h" |
38 | #include "XSLStyleSheet.h" |
39 | #include <wtf/IsoMallocInlines.h> |
40 | #include <wtf/SetForScope.h> |
41 | |
42 | namespace WebCore { |
43 | |
44 | WTF_MAKE_ISO_ALLOCATED_IMPL(ProcessingInstruction); |
45 | |
46 | inline ProcessingInstruction::ProcessingInstruction(Document& document, const String& target, const String& data) |
47 | : CharacterData(document, data, CreateOther) |
48 | , m_target(target) |
49 | { |
50 | } |
51 | |
52 | Ref<ProcessingInstruction> ProcessingInstruction::create(Document& document, const String& target, const String& data) |
53 | { |
54 | return adoptRef(*new ProcessingInstruction(document, target, data)); |
55 | } |
56 | |
57 | ProcessingInstruction::~ProcessingInstruction() |
58 | { |
59 | if (m_sheet) |
60 | m_sheet->clearOwnerNode(); |
61 | |
62 | if (m_cachedSheet) |
63 | m_cachedSheet->removeClient(*this); |
64 | |
65 | if (isConnected()) |
66 | document().styleScope().removeStyleSheetCandidateNode(*this); |
67 | } |
68 | |
69 | String ProcessingInstruction::nodeName() const |
70 | { |
71 | return m_target; |
72 | } |
73 | |
74 | Node::NodeType ProcessingInstruction::nodeType() const |
75 | { |
76 | return PROCESSING_INSTRUCTION_NODE; |
77 | } |
78 | |
79 | Ref<Node> ProcessingInstruction::cloneNodeInternal(Document& targetDocument, CloningOperation) |
80 | { |
81 | // FIXME: Is it a problem that this does not copy m_localHref? |
82 | // What about other data members? |
83 | return create(targetDocument, m_target, data()); |
84 | } |
85 | |
86 | void ProcessingInstruction::checkStyleSheet() |
87 | { |
88 | // Prevent recursive loading of stylesheet. |
89 | if (m_isHandlingBeforeLoad) |
90 | return; |
91 | |
92 | if (m_target == "xml-stylesheet" && document().frame() && parentNode() == &document()) { |
93 | // see http://www.w3.org/TR/xml-stylesheet/ |
94 | // ### support stylesheet included in a fragment of this (or another) document |
95 | // ### make sure this gets called when adding from javascript |
96 | auto attributes = parseAttributes(data()); |
97 | if (!attributes) |
98 | return; |
99 | String type = attributes->get("type" ); |
100 | |
101 | m_isCSS = type.isEmpty() || type == "text/css" ; |
102 | #if ENABLE(XSLT) |
103 | m_isXSL = type == "text/xml" || type == "text/xsl" || type == "application/xml" || type == "application/xhtml+xml" || type == "application/rss+xml" || type == "application/atom+xml" ; |
104 | if (!m_isCSS && !m_isXSL) |
105 | #else |
106 | if (!m_isCSS) |
107 | #endif |
108 | return; |
109 | |
110 | String href = attributes->get("href" ); |
111 | String alternate = attributes->get("alternate" ); |
112 | m_alternate = alternate == "yes" ; |
113 | m_title = attributes->get("title" ); |
114 | m_media = attributes->get("media" ); |
115 | |
116 | if (m_alternate && m_title.isEmpty()) |
117 | return; |
118 | |
119 | if (href.length() > 1 && href[0] == '#') { |
120 | m_localHref = href.substring(1); |
121 | #if ENABLE(XSLT) |
122 | // We need to make a synthetic XSLStyleSheet that is embedded. It needs to be able |
123 | // to kick off import/include loads that can hang off some parent sheet. |
124 | if (m_isXSL) { |
125 | URL finalURL({ }, m_localHref); |
126 | m_sheet = XSLStyleSheet::createEmbedded(this, finalURL); |
127 | m_loading = false; |
128 | document().scheduleToApplyXSLTransforms(); |
129 | } |
130 | #endif |
131 | } else { |
132 | if (m_cachedSheet) { |
133 | m_cachedSheet->removeClient(*this); |
134 | m_cachedSheet = nullptr; |
135 | } |
136 | |
137 | if (m_loading) { |
138 | m_loading = false; |
139 | document().styleScope().removePendingSheet(*this); |
140 | } |
141 | |
142 | Ref<Document> originalDocument = document(); |
143 | |
144 | String url = document().completeURL(href).string(); |
145 | |
146 | { |
147 | SetForScope<bool> change(m_isHandlingBeforeLoad, true); |
148 | if (!dispatchBeforeLoadEvent(url)) |
149 | return; |
150 | } |
151 | |
152 | bool didEventListenerDisconnectThisElement = !isConnected() || &document() != originalDocument.ptr(); |
153 | if (didEventListenerDisconnectThisElement) |
154 | return; |
155 | |
156 | m_loading = true; |
157 | document().styleScope().addPendingSheet(*this); |
158 | |
159 | ASSERT_WITH_SECURITY_IMPLICATION(!m_cachedSheet); |
160 | |
161 | #if ENABLE(XSLT) |
162 | if (m_isXSL) { |
163 | auto options = CachedResourceLoader::defaultCachedResourceOptions(); |
164 | options.mode = FetchOptions::Mode::SameOrigin; |
165 | m_cachedSheet = document().cachedResourceLoader().requestXSLStyleSheet({ResourceRequest(document().completeURL(href)), options}).value_or(nullptr); |
166 | } else |
167 | #endif |
168 | { |
169 | String charset = attributes->get("charset" ); |
170 | CachedResourceRequest request(document().completeURL(href), CachedResourceLoader::defaultCachedResourceOptions(), WTF::nullopt, charset.isEmpty() ? document().charset() : WTFMove(charset)); |
171 | |
172 | m_cachedSheet = document().cachedResourceLoader().requestCSSStyleSheet(WTFMove(request)).value_or(nullptr); |
173 | } |
174 | if (m_cachedSheet) |
175 | m_cachedSheet->addClient(*this); |
176 | else { |
177 | // The request may have been denied if (for example) the stylesheet is local and the document is remote. |
178 | m_loading = false; |
179 | document().styleScope().removePendingSheet(*this); |
180 | #if ENABLE(XSLT) |
181 | if (m_isXSL) |
182 | document().scheduleToApplyXSLTransforms(); |
183 | #endif |
184 | } |
185 | } |
186 | } |
187 | } |
188 | |
189 | bool ProcessingInstruction::isLoading() const |
190 | { |
191 | if (m_loading) |
192 | return true; |
193 | if (!m_sheet) |
194 | return false; |
195 | return m_sheet->isLoading(); |
196 | } |
197 | |
198 | bool ProcessingInstruction::sheetLoaded() |
199 | { |
200 | if (!isLoading()) { |
201 | if (document().styleScope().hasPendingSheet(*this)) |
202 | document().styleScope().removePendingSheet(*this); |
203 | #if ENABLE(XSLT) |
204 | if (m_isXSL) |
205 | document().scheduleToApplyXSLTransforms(); |
206 | #endif |
207 | return true; |
208 | } |
209 | return false; |
210 | } |
211 | |
212 | void ProcessingInstruction::setCSSStyleSheet(const String& href, const URL& baseURL, const String& charset, const CachedCSSStyleSheet* sheet) |
213 | { |
214 | if (!isConnected()) { |
215 | ASSERT(!m_sheet); |
216 | return; |
217 | } |
218 | |
219 | ASSERT(m_isCSS); |
220 | CSSParserContext parserContext(document(), baseURL, charset); |
221 | |
222 | auto cssSheet = CSSStyleSheet::create(StyleSheetContents::create(href, parserContext), *this); |
223 | cssSheet.get().setDisabled(m_alternate); |
224 | cssSheet.get().setTitle(m_title); |
225 | cssSheet.get().setMediaQueries(MediaQuerySet::create(m_media, MediaQueryParserContext(document()))); |
226 | |
227 | m_sheet = WTFMove(cssSheet); |
228 | |
229 | // We don't need the cross-origin security check here because we are |
230 | // getting the sheet text in "strict" mode. This enforces a valid CSS MIME |
231 | // type. |
232 | Ref<Document> protect(document()); |
233 | parseStyleSheet(sheet->sheetText()); |
234 | } |
235 | |
236 | #if ENABLE(XSLT) |
237 | void ProcessingInstruction::setXSLStyleSheet(const String& href, const URL& baseURL, const String& sheet) |
238 | { |
239 | ASSERT(m_isXSL); |
240 | m_sheet = XSLStyleSheet::create(this, href, baseURL); |
241 | Ref<Document> protect(document()); |
242 | parseStyleSheet(sheet); |
243 | } |
244 | #endif |
245 | |
246 | void ProcessingInstruction::parseStyleSheet(const String& sheet) |
247 | { |
248 | if (m_isCSS) |
249 | downcast<CSSStyleSheet>(*m_sheet).contents().parseString(sheet); |
250 | #if ENABLE(XSLT) |
251 | else if (m_isXSL) |
252 | downcast<XSLStyleSheet>(*m_sheet).parseString(sheet); |
253 | #endif |
254 | |
255 | if (m_cachedSheet) |
256 | m_cachedSheet->removeClient(*this); |
257 | m_cachedSheet = nullptr; |
258 | |
259 | m_loading = false; |
260 | |
261 | if (m_isCSS) |
262 | downcast<CSSStyleSheet>(*m_sheet).contents().checkLoaded(); |
263 | #if ENABLE(XSLT) |
264 | else if (m_isXSL) |
265 | downcast<XSLStyleSheet>(*m_sheet).checkLoaded(); |
266 | #endif |
267 | } |
268 | |
269 | void ProcessingInstruction::addSubresourceAttributeURLs(ListHashSet<URL>& urls) const |
270 | { |
271 | if (!sheet()) |
272 | return; |
273 | |
274 | addSubresourceURL(urls, sheet()->baseURL()); |
275 | } |
276 | |
277 | Node::InsertedIntoAncestorResult ProcessingInstruction::insertedIntoAncestor(InsertionType insertionType, ContainerNode& parentOfInsertedTree) |
278 | { |
279 | CharacterData::insertedIntoAncestor(insertionType, parentOfInsertedTree); |
280 | if (!insertionType.connectedToDocument) |
281 | return InsertedIntoAncestorResult::Done; |
282 | document().styleScope().addStyleSheetCandidateNode(*this, m_createdByParser); |
283 | return InsertedIntoAncestorResult::NeedsPostInsertionCallback; |
284 | } |
285 | |
286 | void ProcessingInstruction::didFinishInsertingNode() |
287 | { |
288 | checkStyleSheet(); |
289 | } |
290 | |
291 | void ProcessingInstruction::removedFromAncestor(RemovalType removalType, ContainerNode& oldParentOfRemovedTree) |
292 | { |
293 | CharacterData::removedFromAncestor(removalType, oldParentOfRemovedTree); |
294 | if (!removalType.disconnectedFromDocument) |
295 | return; |
296 | |
297 | document().styleScope().removeStyleSheetCandidateNode(*this); |
298 | |
299 | if (m_sheet) { |
300 | ASSERT(m_sheet->ownerNode() == this); |
301 | m_sheet->clearOwnerNode(); |
302 | m_sheet = nullptr; |
303 | } |
304 | |
305 | if (m_loading) { |
306 | m_loading = false; |
307 | document().styleScope().removePendingSheet(*this); |
308 | } |
309 | |
310 | document().styleScope().didChangeActiveStyleSheetCandidates(); |
311 | } |
312 | |
313 | void ProcessingInstruction::finishParsingChildren() |
314 | { |
315 | m_createdByParser = false; |
316 | CharacterData::finishParsingChildren(); |
317 | } |
318 | |
319 | } // namespace |
320 | |