1 /*
2 * Copyright (C) 2000 Peter Kelly (pmk@post.com)
3 * Copyright (C) 2006, 2008, 2009 Apple Inc. All rights reserved.
4 *
5 * This library is free software; you can redistribute it and/or
6 * modify it under the terms of the GNU Library General Public
7 * License as published by the Free Software Foundation; either
8 * version 2 of the License, or (at your option) any later version.
9 *
10 * This library is distributed in the hope that it will be useful,
11 * but WITHOUT ANY WARRANTY; without even the implied warranty of
12 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
13 * Library General Public License for more details.
14 *
15 * You should have received a copy of the GNU Library General Public License
16 * along with this library; see the file COPYING.LIB. If not, write to
17 * the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
18 * Boston, MA 02110-1301, USA.
19 */
20
21 #include "config.h"
22 #include "core/dom/ProcessingInstruction.h"
23
24 #include "FetchInitiatorTypeNames.h"
25 #include "core/css/CSSStyleSheet.h"
26 #include "core/css/MediaList.h"
27 #include "core/css/StyleSheetContents.h"
28 #include "core/dom/Document.h"
29 #include "core/dom/StyleEngine.h"
30 #include "core/fetch/CSSStyleSheetResource.h"
31 #include "core/fetch/FetchRequest.h"
32 #include "core/fetch/ResourceFetcher.h"
33 #include "core/fetch/XSLStyleSheetResource.h"
34 #include "core/xml/XSLStyleSheet.h"
35 #include "core/xml/parser/XMLDocumentParser.h" // for parseAttributes()
36
37 namespace WebCore {
38
ProcessingInstruction(Document & document,const String & target,const String & data)39 inline ProcessingInstruction::ProcessingInstruction(Document& document, const String& target, const String& data)
40 : CharacterData(document, data, CreateOther)
41 , m_target(target)
42 , m_loading(false)
43 , m_alternate(false)
44 , m_createdByParser(false)
45 , m_isCSS(false)
46 , m_isXSL(false)
47 {
48 ScriptWrappable::init(this);
49 }
50
create(Document & document,const String & target,const String & data)51 PassRefPtr<ProcessingInstruction> ProcessingInstruction::create(Document& document, const String& target, const String& data)
52 {
53 return adoptRef(new ProcessingInstruction(document, target, data));
54 }
55
~ProcessingInstruction()56 ProcessingInstruction::~ProcessingInstruction()
57 {
58 if (m_sheet)
59 m_sheet->clearOwnerNode();
60
61 if (inDocument())
62 document().styleEngine()->removeStyleSheetCandidateNode(this);
63 }
64
nodeName() const65 String ProcessingInstruction::nodeName() const
66 {
67 return m_target;
68 }
69
nodeType() const70 Node::NodeType ProcessingInstruction::nodeType() const
71 {
72 return PROCESSING_INSTRUCTION_NODE;
73 }
74
cloneNode(bool)75 PassRefPtr<Node> ProcessingInstruction::cloneNode(bool /*deep*/)
76 {
77 // FIXME: Is it a problem that this does not copy m_localHref?
78 // What about other data members?
79 return create(document(), m_target, m_data);
80 }
81
checkStyleSheet()82 void ProcessingInstruction::checkStyleSheet()
83 {
84 if (m_target == "xml-stylesheet" && document().frame() && parentNode() == document()) {
85 // see http://www.w3.org/TR/xml-stylesheet/
86 // ### support stylesheet included in a fragment of this (or another) document
87 // ### make sure this gets called when adding from javascript
88 bool attrsOk;
89 const HashMap<String, String> attrs = parseAttributes(m_data, attrsOk);
90 if (!attrsOk)
91 return;
92 HashMap<String, String>::const_iterator i = attrs.find("type");
93 String type;
94 if (i != attrs.end())
95 type = i->value;
96
97 m_isCSS = type.isEmpty() || type == "text/css";
98 m_isXSL = (type == "text/xml" || type == "text/xsl" || type == "application/xml" ||
99 type == "application/xhtml+xml" || type == "application/rss+xml" || type == "application/atom+xml");
100 if (!m_isCSS && !m_isXSL)
101 return;
102
103 String href = attrs.get("href");
104 String alternate = attrs.get("alternate");
105 m_alternate = alternate == "yes";
106 m_title = attrs.get("title");
107 m_media = attrs.get("media");
108
109 if (m_alternate && m_title.isEmpty())
110 return;
111
112 if (href.length() > 1 && href[0] == '#') {
113 m_localHref = href.substring(1);
114 // We need to make a synthetic XSLStyleSheet that is embedded. It needs to be able
115 // to kick off import/include loads that can hang off some parent sheet.
116 if (m_isXSL) {
117 KURL finalURL(ParsedURLString, m_localHref);
118 m_sheet = XSLStyleSheet::createEmbedded(this, finalURL);
119 m_loading = false;
120 }
121 } else {
122 clearResource();
123
124 String url = document().completeURL(href).string();
125 if (!dispatchBeforeLoadEvent(url))
126 return;
127
128 ResourcePtr<StyleSheetResource> resource;
129 FetchRequest request(ResourceRequest(document().completeURL(href)), FetchInitiatorTypeNames::processinginstruction);
130 if (m_isXSL) {
131 resource = document().fetcher()->fetchXSLStyleSheet(request);
132 } else {
133 String charset = attrs.get("charset");
134 if (charset.isEmpty())
135 charset = document().charset();
136 request.setCharset(charset);
137 resource = document().fetcher()->fetchCSSStyleSheet(request);
138 }
139
140 if (resource) {
141 m_loading = true;
142 document().styleEngine()->addPendingSheet();
143 setResource(resource);
144 }
145 }
146 }
147 }
148
isLoading() const149 bool ProcessingInstruction::isLoading() const
150 {
151 if (m_loading)
152 return true;
153 if (!m_sheet)
154 return false;
155 return m_sheet->isLoading();
156 }
157
sheetLoaded()158 bool ProcessingInstruction::sheetLoaded()
159 {
160 if (!isLoading()) {
161 document().styleEngine()->removePendingSheet(this);
162 return true;
163 }
164 return false;
165 }
166
setCSSStyleSheet(const String & href,const KURL & baseURL,const String & charset,const CSSStyleSheetResource * sheet)167 void ProcessingInstruction::setCSSStyleSheet(const String& href, const KURL& baseURL, const String& charset, const CSSStyleSheetResource* sheet)
168 {
169 if (!inDocument()) {
170 ASSERT(!m_sheet);
171 return;
172 }
173
174 ASSERT(m_isCSS);
175 CSSParserContext parserContext(document(), baseURL, charset);
176
177 RefPtr<StyleSheetContents> newSheet = StyleSheetContents::create(href, parserContext);
178
179 RefPtr<CSSStyleSheet> cssSheet = CSSStyleSheet::create(newSheet, this);
180 cssSheet->setDisabled(m_alternate);
181 cssSheet->setTitle(m_title);
182 cssSheet->setMediaQueries(MediaQuerySet::create(m_media));
183
184 m_sheet = cssSheet.release();
185
186 // We don't need the cross-origin security check here because we are
187 // getting the sheet text in "strict" mode. This enforces a valid CSS MIME
188 // type.
189 parseStyleSheet(sheet->sheetText(true));
190 }
191
setXSLStyleSheet(const String & href,const KURL & baseURL,const String & sheet)192 void ProcessingInstruction::setXSLStyleSheet(const String& href, const KURL& baseURL, const String& sheet)
193 {
194 ASSERT(m_isXSL);
195 m_sheet = XSLStyleSheet::create(this, href, baseURL);
196 parseStyleSheet(sheet);
197 }
198
parseStyleSheet(const String & sheet)199 void ProcessingInstruction::parseStyleSheet(const String& sheet)
200 {
201 if (m_isCSS)
202 toCSSStyleSheet(m_sheet.get())->contents()->parseString(sheet);
203 else if (m_isXSL)
204 toXSLStyleSheet(m_sheet.get())->parseString(sheet);
205
206 clearResource();
207 m_loading = false;
208
209 if (m_isCSS)
210 toCSSStyleSheet(m_sheet.get())->contents()->checkLoaded();
211 else if (m_isXSL)
212 toXSLStyleSheet(m_sheet.get())->checkLoaded();
213 }
214
setCSSStyleSheet(PassRefPtr<CSSStyleSheet> sheet)215 void ProcessingInstruction::setCSSStyleSheet(PassRefPtr<CSSStyleSheet> sheet)
216 {
217 ASSERT(!resource());
218 ASSERT(!m_loading);
219 m_sheet = sheet;
220 sheet->setTitle(m_title);
221 sheet->setDisabled(m_alternate);
222 }
223
addSubresourceAttributeURLs(ListHashSet<KURL> & urls) const224 void ProcessingInstruction::addSubresourceAttributeURLs(ListHashSet<KURL>& urls) const
225 {
226 if (!sheet())
227 return;
228
229 addSubresourceURL(urls, sheet()->baseURL());
230 }
231
insertedInto(ContainerNode * insertionPoint)232 Node::InsertionNotificationRequest ProcessingInstruction::insertedInto(ContainerNode* insertionPoint)
233 {
234 CharacterData::insertedInto(insertionPoint);
235 if (!insertionPoint->inDocument())
236 return InsertionDone;
237 document().styleEngine()->addStyleSheetCandidateNode(this, m_createdByParser);
238 checkStyleSheet();
239 return InsertionDone;
240 }
241
removedFrom(ContainerNode * insertionPoint)242 void ProcessingInstruction::removedFrom(ContainerNode* insertionPoint)
243 {
244 CharacterData::removedFrom(insertionPoint);
245 if (!insertionPoint->inDocument())
246 return;
247
248 document().styleEngine()->removeStyleSheetCandidateNode(this);
249
250 RefPtr<StyleSheet> removedSheet = m_sheet;
251
252 if (m_sheet) {
253 ASSERT(m_sheet->ownerNode() == this);
254 m_sheet->clearOwnerNode();
255 m_sheet = 0;
256 }
257
258 // If we're in document teardown, then we don't need to do any notification of our sheet's removal.
259 if (document().isActive())
260 document().removedStyleSheet(removedSheet.get());
261 }
262
finishParsingChildren()263 void ProcessingInstruction::finishParsingChildren()
264 {
265 m_createdByParser = false;
266 CharacterData::finishParsingChildren();
267 }
268
269 } // namespace
270