1/*
2 * Copyright (C) 2000 Peter Kelly (pmk@post.com)
3 * Copyright (C) 2006, 2008, 2009 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 "ExceptionCode.h"
32#include "Frame.h"
33#include "FrameLoader.h"
34#include "XSLStyleSheet.h"
35#include "XMLDocumentParser.h" // for parseAttributes()
36#include "MediaList.h"
37#include "StyleSheetContents.h"
38
39namespace WebCore {
40
41inline ProcessingInstruction::ProcessingInstruction(Document& document, const String& target, const String& data)
42    : CharacterData(document, data, CreateOther)
43    , m_target(target)
44    , m_cachedSheet(0)
45    , m_loading(false)
46    , m_alternate(false)
47    , m_createdByParser(false)
48    , m_isCSS(false)
49#if ENABLE(XSLT)
50    , m_isXSL(false)
51#endif
52{
53}
54
55PassRefPtr<ProcessingInstruction> ProcessingInstruction::create(Document& document, const String& target, const String& data)
56{
57    return adoptRef(new ProcessingInstruction(document, target, data));
58}
59
60ProcessingInstruction::~ProcessingInstruction()
61{
62    if (m_sheet)
63        m_sheet->clearOwnerNode();
64
65    if (m_cachedSheet)
66        m_cachedSheet->removeClient(this);
67
68    if (inDocument())
69        document().styleSheetCollection().removeStyleSheetCandidateNode(*this);
70}
71
72String ProcessingInstruction::nodeName() const
73{
74    return m_target;
75}
76
77Node::NodeType ProcessingInstruction::nodeType() const
78{
79    return PROCESSING_INSTRUCTION_NODE;
80}
81
82PassRefPtr<Node> ProcessingInstruction::cloneNode(bool /*deep*/)
83{
84    // FIXME: Is it a problem that this does not copy m_localHref?
85    // What about other data members?
86    return create(document(), m_target, data());
87}
88
89void ProcessingInstruction::checkStyleSheet()
90{
91    if (m_target == "xml-stylesheet" && document().frame() && parentNode() == &document()) {
92        // see http://www.w3.org/TR/xml-stylesheet/
93        // ### support stylesheet included in a fragment of this (or another) document
94        // ### make sure this gets called when adding from javascript
95        bool attrsOk;
96        const HashMap<String, String> attrs = parseAttributes(data(), attrsOk);
97        if (!attrsOk)
98            return;
99        HashMap<String, String>::const_iterator i = attrs.find("type");
100        String type;
101        if (i != attrs.end())
102            type = i->value;
103
104        m_isCSS = type.isEmpty() || type == "text/css";
105#if ENABLE(XSLT)
106        m_isXSL = (type == "text/xml" || type == "text/xsl" || type == "application/xml" ||
107                   type == "application/xhtml+xml" || type == "application/rss+xml" || type == "application/atom+xml");
108        if (!m_isCSS && !m_isXSL)
109#else
110        if (!m_isCSS)
111#endif
112            return;
113
114        String href = attrs.get("href");
115        String alternate = attrs.get("alternate");
116        m_alternate = alternate == "yes";
117        m_title = attrs.get("title");
118        m_media = attrs.get("media");
119
120        if (m_alternate && m_title.isEmpty())
121            return;
122
123        if (href.length() > 1 && href[0] == '#') {
124            m_localHref = href.substring(1);
125#if ENABLE(XSLT)
126            // We need to make a synthetic XSLStyleSheet that is embedded.  It needs to be able
127            // to kick off import/include loads that can hang off some parent sheet.
128            if (m_isXSL) {
129                URL finalURL(ParsedURLString, m_localHref);
130                m_sheet = XSLStyleSheet::createEmbedded(this, finalURL);
131                m_loading = false;
132            }
133#endif
134        } else {
135            if (m_cachedSheet) {
136                m_cachedSheet->removeClient(this);
137                m_cachedSheet = 0;
138            }
139
140            String url = document().completeURL(href).string();
141            if (!dispatchBeforeLoadEvent(url))
142                return;
143
144            m_loading = true;
145            document().styleSheetCollection().addPendingSheet();
146
147            CachedResourceRequest request(ResourceRequest(document().completeURL(href)));
148#if ENABLE(XSLT)
149            if (m_isXSL)
150                m_cachedSheet = document().cachedResourceLoader()->requestXSLStyleSheet(request);
151            else
152#endif
153            {
154                String charset = attrs.get("charset");
155                if (charset.isEmpty())
156                    charset = document().charset();
157                request.setCharset(charset);
158
159                m_cachedSheet = document().cachedResourceLoader()->requestCSSStyleSheet(request);
160            }
161            if (m_cachedSheet)
162                m_cachedSheet->addClient(this);
163            else {
164                // The request may have been denied if (for example) the stylesheet is local and the document is remote.
165                m_loading = false;
166                document().styleSheetCollection().removePendingSheet();
167            }
168        }
169    }
170}
171
172bool ProcessingInstruction::isLoading() const
173{
174    if (m_loading)
175        return true;
176    if (!m_sheet)
177        return false;
178    return m_sheet->isLoading();
179}
180
181bool ProcessingInstruction::sheetLoaded()
182{
183    if (!isLoading()) {
184        document().styleSheetCollection().removePendingSheet();
185        return true;
186    }
187    return false;
188}
189
190void ProcessingInstruction::setCSSStyleSheet(const String& href, const URL& baseURL, const String& charset, const CachedCSSStyleSheet* sheet)
191{
192    if (!inDocument()) {
193        ASSERT(!m_sheet);
194        return;
195    }
196
197    ASSERT(m_isCSS);
198    CSSParserContext parserContext(document(), baseURL, charset);
199
200    auto cssSheet = CSSStyleSheet::create(StyleSheetContents::create(href, parserContext), this);
201    cssSheet.get().setDisabled(m_alternate);
202    cssSheet.get().setTitle(m_title);
203    cssSheet.get().setMediaQueries(MediaQuerySet::create(m_media));
204
205    m_sheet = WTF::move(cssSheet);
206
207    // We don't need the cross-origin security check here because we are
208    // getting the sheet text in "strict" mode. This enforces a valid CSS MIME
209    // type.
210    parseStyleSheet(sheet->sheetText(true));
211}
212
213#if ENABLE(XSLT)
214void ProcessingInstruction::setXSLStyleSheet(const String& href, const URL& baseURL, const String& sheet)
215{
216    ASSERT(m_isXSL);
217    m_sheet = XSLStyleSheet::create(this, href, baseURL);
218    parseStyleSheet(sheet);
219}
220#endif
221
222void ProcessingInstruction::parseStyleSheet(const String& sheet)
223{
224    if (m_isCSS)
225        static_cast<CSSStyleSheet*>(m_sheet.get())->contents().parseString(sheet);
226#if ENABLE(XSLT)
227    else if (m_isXSL)
228        static_cast<XSLStyleSheet*>(m_sheet.get())->parseString(sheet);
229#endif
230
231    if (m_cachedSheet)
232        m_cachedSheet->removeClient(this);
233    m_cachedSheet = 0;
234
235    m_loading = false;
236
237    if (m_isCSS)
238        static_cast<CSSStyleSheet*>(m_sheet.get())->contents().checkLoaded();
239#if ENABLE(XSLT)
240    else if (m_isXSL)
241        static_cast<XSLStyleSheet*>(m_sheet.get())->checkLoaded();
242#endif
243}
244
245void ProcessingInstruction::setCSSStyleSheet(PassRefPtr<CSSStyleSheet> sheet)
246{
247    ASSERT(!m_cachedSheet);
248    ASSERT(!m_loading);
249    m_sheet = sheet;
250    sheet->setTitle(m_title);
251    sheet->setDisabled(m_alternate);
252}
253
254void ProcessingInstruction::addSubresourceAttributeURLs(ListHashSet<URL>& urls) const
255{
256    if (!sheet())
257        return;
258
259    addSubresourceURL(urls, sheet()->baseURL());
260}
261
262Node::InsertionNotificationRequest ProcessingInstruction::insertedInto(ContainerNode& insertionPoint)
263{
264    CharacterData::insertedInto(insertionPoint);
265    if (!insertionPoint.inDocument())
266        return InsertionDone;
267    document().styleSheetCollection().addStyleSheetCandidateNode(*this, m_createdByParser);
268    checkStyleSheet();
269    return InsertionDone;
270}
271
272void ProcessingInstruction::removedFrom(ContainerNode& insertionPoint)
273{
274    CharacterData::removedFrom(insertionPoint);
275    if (!insertionPoint.inDocument())
276        return;
277
278    document().styleSheetCollection().removeStyleSheetCandidateNode(*this);
279
280    if (m_sheet) {
281        ASSERT(m_sheet->ownerNode() == this);
282        m_sheet->clearOwnerNode();
283        m_sheet = 0;
284    }
285
286    // If we're in document teardown, then we don't need to do any notification of our sheet's removal.
287    if (document().hasLivingRenderTree())
288        document().styleResolverChanged(DeferRecalcStyle);
289}
290
291void ProcessingInstruction::finishParsingChildren()
292{
293    m_createdByParser = false;
294    CharacterData::finishParsingChildren();
295}
296
297} // namespace
298