2 * This file is part of the XSL implementation.
4 * Copyright (C) 2004, 2005, 2006, 2008, 2012 Apple Inc. All rights reserved.
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.
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.
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.
23 #include "XSLStyleSheet.h"
28 #include "DOMWindow.h"
29 #include "CachedResourceLoader.h"
33 #include "TransformSource.h"
34 #include "XMLDocumentParser.h"
35 #include "XMLDocumentParserScope.h"
36 #include "XSLImportRule.h"
37 #include "XSLTProcessor.h"
38 #include <wtf/text/CString.h>
40 #include <libxml/uri.h>
41 #include <libxslt/xsltutils.h>
44 #include "SoftLinking.h"
48 SOFT_LINK_LIBRARY(libxslt)
49 SOFT_LINK(libxslt, xsltIsBlank, int, (xmlChar *str), (str))
50 SOFT_LINK(libxslt, xsltGetNsProp, xmlChar *, (xmlNodePtr node, const xmlChar *name, const xmlChar *nameSpace), (node, name, nameSpace))
51 SOFT_LINK(libxslt, xsltParseStylesheetDoc, xsltStylesheetPtr, (xmlDocPtr doc), (doc))
52 SOFT_LINK(libxslt, xsltLoadStylesheetPI, xsltStylesheetPtr, (xmlDocPtr doc), (doc))
57 XSLStyleSheet::XSLStyleSheet(XSLImportRule* parentRule, const String& originalURL, const KURL& finalURL)
59 , m_originalURL(originalURL)
60 , m_finalURL(finalURL)
63 , m_processed(false) // Child sheets get marked as processed when the libxslt engine has finally seen them.
65 , m_stylesheetDocTaken(false)
66 , m_parentStyleSheet(parentRule ? parentRule->parentStyleSheet() : 0)
70 XSLStyleSheet::XSLStyleSheet(Node* parentNode, const String& originalURL, const KURL& finalURL, bool embedded)
71 : m_ownerNode(parentNode)
72 , m_originalURL(originalURL)
73 , m_finalURL(finalURL)
75 , m_embedded(embedded)
76 , m_processed(true) // The root sheet starts off processed.
78 , m_stylesheetDocTaken(false)
79 , m_parentStyleSheet(0)
83 XSLStyleSheet::~XSLStyleSheet()
85 if (!m_stylesheetDocTaken)
86 xmlFreeDoc(m_stylesheetDoc);
88 for (unsigned i = 0; i < m_children.size(); ++i) {
89 ASSERT(m_children.at(i)->parentStyleSheet() == this);
90 m_children.at(i)->setParentStyleSheet(0);
94 bool XSLStyleSheet::isLoading() const
96 for (unsigned i = 0; i < m_children.size(); ++i) {
97 if (m_children.at(i)->isLoading())
103 void XSLStyleSheet::checkLoaded()
107 if (XSLStyleSheet* styleSheet = parentStyleSheet())
108 styleSheet->checkLoaded();
110 ownerNode()->sheetLoaded();
113 xmlDocPtr XSLStyleSheet::document()
115 if (m_embedded && ownerDocument() && ownerDocument()->transformSource())
116 return (xmlDocPtr)ownerDocument()->transformSource()->platformSource();
117 return m_stylesheetDoc;
120 void XSLStyleSheet::clearDocuments()
123 for (unsigned i = 0; i < m_children.size(); ++i) {
124 XSLImportRule* import = m_children.at(i).get();
125 if (import->styleSheet())
126 import->styleSheet()->clearDocuments();
130 CachedResourceLoader* XSLStyleSheet::cachedResourceLoader()
132 Document* document = ownerDocument();
135 return document->cachedResourceLoader();
138 bool XSLStyleSheet::parseString(const String& string)
140 // Parse in a single chunk into an xmlDocPtr
141 const UChar BOM = 0xFEFF;
142 const unsigned char BOMHighByte = *reinterpret_cast<const unsigned char*>(&BOM);
143 if (!m_stylesheetDocTaken)
144 xmlFreeDoc(m_stylesheetDoc);
145 m_stylesheetDocTaken = false;
147 Console* console = 0;
148 if (Frame* frame = ownerDocument()->frame())
149 console = frame->domWindow()->console();
151 XMLDocumentParserScope scope(cachedResourceLoader(), XSLTProcessor::genericErrorFunc, XSLTProcessor::parseErrorFunc, console);
153 const char* buffer = reinterpret_cast<const char*>(string.characters());
154 int size = string.length() * sizeof(UChar);
156 xmlParserCtxtPtr ctxt = xmlCreateMemoryParserCtxt(buffer, size);
160 if (m_parentStyleSheet) {
161 // The XSL transform may leave the newly-transformed document
162 // with references to the symbol dictionaries of the style sheet
163 // and any of its children. XML document disposal can corrupt memory
164 // if a document uses more than one symbol dictionary, so we
165 // ensure that all child stylesheets use the same dictionaries as their
167 xmlDictFree(ctxt->dict);
168 ctxt->dict = m_parentStyleSheet->m_stylesheetDoc->dict;
169 xmlDictReference(ctxt->dict);
172 m_stylesheetDoc = xmlCtxtReadMemory(ctxt, buffer, size,
173 finalURL().string().utf8().data(),
174 BOMHighByte == 0xFF ? "UTF-16LE" : "UTF-16BE",
175 XML_PARSE_NOENT | XML_PARSE_DTDATTR | XML_PARSE_NOWARNING | XML_PARSE_NOCDATA);
176 xmlFreeParserCtxt(ctxt);
180 return m_stylesheetDoc;
183 void XSLStyleSheet::loadChildSheets()
188 xmlNodePtr stylesheetRoot = document()->children;
190 // Top level children may include other things such as DTD nodes, we ignore those.
191 while (stylesheetRoot && stylesheetRoot->type != XML_ELEMENT_NODE)
192 stylesheetRoot = stylesheetRoot->next;
195 // We have to locate (by ID) the appropriate embedded stylesheet element, so that we can walk the
196 // import/include list.
197 xmlAttrPtr idNode = xmlGetID(document(), (const xmlChar*)(finalURL().string().utf8().data()));
200 stylesheetRoot = idNode->parent;
202 // FIXME: Need to handle an external URI with a # in it. This is a pretty minor edge case, so we'll deal
206 if (stylesheetRoot) {
207 // Walk the children of the root element and look for import/include elements.
208 // Imports must occur first.
209 xmlNodePtr curr = stylesheetRoot->children;
211 if (curr->type != XML_ELEMENT_NODE) {
215 if (IS_XSLT_ELEM(curr) && IS_XSLT_NAME(curr, "import")) {
216 xmlChar* uriRef = xsltGetNsProp(curr, (const xmlChar*)"href", XSLT_NAMESPACE);
217 loadChildSheet(String::fromUTF8((const char*)uriRef));
224 // Now handle includes.
226 if (curr->type == XML_ELEMENT_NODE && IS_XSLT_ELEM(curr) && IS_XSLT_NAME(curr, "include")) {
227 xmlChar* uriRef = xsltGetNsProp(curr, (const xmlChar*)"href", XSLT_NAMESPACE);
228 loadChildSheet(String::fromUTF8((const char*)uriRef));
236 void XSLStyleSheet::loadChildSheet(const String& href)
238 OwnPtr<XSLImportRule> childRule = XSLImportRule::create(this, href);
239 XSLImportRule* c = childRule.get();
240 m_children.append(childRule.release());
244 xsltStylesheetPtr XSLStyleSheet::compileStyleSheet()
246 // FIXME: Hook up error reporting for the stylesheet compilation process.
248 return xsltLoadStylesheetPI(document());
250 // xsltParseStylesheetDoc makes the document part of the stylesheet
251 // so we have to release our pointer to it.
252 ASSERT(!m_stylesheetDocTaken);
253 xsltStylesheetPtr result = xsltParseStylesheetDoc(m_stylesheetDoc);
255 m_stylesheetDocTaken = true;
259 void XSLStyleSheet::setParentStyleSheet(XSLStyleSheet* parent)
261 m_parentStyleSheet = parent;
264 Document* XSLStyleSheet::ownerDocument()
266 for (XSLStyleSheet* styleSheet = this; styleSheet; styleSheet = styleSheet->parentStyleSheet()) {
267 Node* node = styleSheet->ownerNode();
269 return node->document();
274 xmlDocPtr XSLStyleSheet::locateStylesheetSubResource(xmlDocPtr parentDoc, const xmlChar* uri)
276 bool matchedParent = (parentDoc == document());
277 for (unsigned i = 0; i < m_children.size(); ++i) {
278 XSLImportRule* import = m_children.at(i).get();
279 XSLStyleSheet* child = import->styleSheet();
283 if (child->processed())
284 continue; // libxslt has been given this sheet already.
286 // Check the URI of the child stylesheet against the doc URI.
287 // In order to ensure that libxml canonicalized both URLs, we get the original href
288 // string from the import rule and canonicalize it using libxml before comparing it
289 // with the URI argument.
290 CString importHref = import->href().utf8();
291 xmlChar* base = xmlNodeGetBase(parentDoc, (xmlNodePtr)parentDoc);
292 xmlChar* childURI = xmlBuildURI((const xmlChar*)importHref.data(), base);
293 bool equalURIs = xmlStrEqual(uri, childURI);
297 child->markAsProcessed();
298 return child->document();
302 xmlDocPtr result = import->styleSheet()->locateStylesheetSubResource(parentDoc, uri);
310 void XSLStyleSheet::markAsProcessed()
312 ASSERT(!m_processed);
313 ASSERT(!m_stylesheetDocTaken);
315 m_stylesheetDocTaken = true;
318 } // namespace WebCore
320 #endif // ENABLE(XSLT)