| /** |
| * This file is part of the XSL implementation. |
| * |
| * Copyright (C) 2004, 2005, 2006 Apple Computer, Inc. |
| * Copyright (C) 2005, 2006 Alexey Proskuryakov <ap@webkit.org> |
| * |
| * This library is free software; you can redistribute it and/or |
| * modify it under the terms of the GNU Library General Public |
| * License as published by the Free Software Foundation; either |
| * version 2 of the License, or (at your option) any later version. |
| * |
| * This library is distributed in the hope that it will be useful, |
| * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
| * Library General Public License for more details. |
| * |
| * You should have received a copy of the GNU Library General Public License |
| * along with this library; see the file COPYING.LIB. If not, write to |
| * the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, |
| * Boston, MA 02110-1301, USA. |
| */ |
| |
| #include "config.h" |
| |
| #if ENABLE(XSLT) |
| |
| #include "XSLTProcessor.h" |
| |
| #include "CString.h" |
| #include "Cache.h" |
| #include "DOMImplementation.h" |
| #include "DocLoader.h" |
| #include "DocumentFragment.h" |
| #include "Frame.h" |
| #include "FrameLoader.h" |
| #include "FrameView.h" |
| #include "HTMLDocument.h" |
| #include "HTMLTokenizer.h" |
| #include "ResourceHandle.h" |
| #include "ResourceRequest.h" |
| #include "ResourceResponse.h" |
| #include "Text.h" |
| #include "TextResourceDecoder.h" |
| #include "XMLTokenizer.h" |
| #include "XSLTExtensions.h" |
| #include "loader.h" |
| #include "markup.h" |
| #include <libxslt/imports.h> |
| #include <libxslt/variables.h> |
| #include <libxslt/xsltutils.h> |
| #include <wtf/Assertions.h> |
| #include <wtf/Platform.h> |
| #include <wtf/Vector.h> |
| #if PLATFORM(MAC) |
| #include "SoftLinking.h" |
| #endif |
| |
| #if PLATFORM(MAC) |
| SOFT_LINK_LIBRARY(libxslt); |
| SOFT_LINK(libxslt, xsltFreeStylesheet, void, (xsltStylesheetPtr sheet), (sheet)) |
| SOFT_LINK(libxslt, xsltFreeTransformContext, void, (xsltTransformContextPtr ctxt), (ctxt)) |
| SOFT_LINK(libxslt, xsltNewTransformContext, xsltTransformContextPtr, (xsltStylesheetPtr style, xmlDocPtr doc), (style, doc)) |
| SOFT_LINK(libxslt, xsltApplyStylesheetUser, xmlDocPtr, (xsltStylesheetPtr style, xmlDocPtr doc, const char **params, const char *output, FILE * profile, xsltTransformContextPtr userCtxt), (style, doc, params, output, profile, userCtxt)) |
| SOFT_LINK(libxslt, xsltQuoteUserParams, int, (xsltTransformContextPtr ctxt, const char **params), (ctxt, params)) |
| SOFT_LINK(libxslt, xsltSetLoaderFunc, void, (xsltDocLoaderFunc f), (f)) |
| SOFT_LINK(libxslt, xsltSaveResultTo, int, (xmlOutputBufferPtr buf, xmlDocPtr result, xsltStylesheetPtr style), (buf, result, style)) |
| SOFT_LINK(libxslt, xsltNextImport, xsltStylesheetPtr, (xsltStylesheetPtr style), (style)) |
| #endif |
| |
| namespace WebCore { |
| |
| static void parseErrorFunc(void *ctxt, const char *msg, ...) |
| { |
| // FIXME: It would be nice to display error messages somewhere. |
| #if !PLATFORM(WIN_OS) |
| // FIXME: No vasprintf support. |
| #ifndef ERROR_DISABLED |
| char *errorMessage = 0; |
| va_list args; |
| va_start(args, msg); |
| vasprintf(&errorMessage, msg, args); |
| LOG_ERROR("%s", errorMessage); |
| if (errorMessage) |
| free(errorMessage); |
| va_end(args); |
| #endif |
| #endif |
| } |
| |
| // FIXME: There seems to be no way to control the ctxt pointer for loading here, thus we have globals. |
| static XSLTProcessor *globalProcessor = 0; |
| static DocLoader *globalDocLoader = 0; |
| static xmlDocPtr docLoaderFunc(const xmlChar *uri, |
| xmlDictPtr dict, |
| int options, |
| void* ctxt, |
| xsltLoadType type) |
| { |
| if (!globalProcessor) |
| return 0; |
| |
| switch (type) { |
| case XSLT_LOAD_DOCUMENT: { |
| xsltTransformContextPtr context = (xsltTransformContextPtr)ctxt; |
| xmlChar *base = xmlNodeGetBase(context->document->doc, context->node); |
| KURL url((const char*)base, (const char*)uri); |
| xmlFree(base); |
| ResourceError error; |
| ResourceResponse response; |
| xmlGenericErrorFunc oldErrorFunc = xmlGenericError; |
| void *oldErrorContext = xmlGenericErrorContext; |
| |
| Vector<char> data; |
| |
| if (globalDocLoader->frame()) |
| globalDocLoader->frame()->loader()->loadResourceSynchronously(url, error, response, data); |
| |
| xmlSetGenericErrorFunc(0, parseErrorFunc); |
| // We don't specify an encoding here. Neither Gecko nor WinIE respects |
| // the encoding specified in the HTTP headers. |
| xmlDocPtr doc = xmlReadMemory(data.data(), data.size(), (const char*)uri, 0, options); |
| xmlSetGenericErrorFunc(oldErrorContext, oldErrorFunc); |
| return doc; |
| } |
| case XSLT_LOAD_STYLESHEET: |
| return globalProcessor->xslStylesheet()->locateStylesheetSubResource(((xsltStylesheetPtr)ctxt)->doc, uri); |
| default: |
| break; |
| } |
| |
| return 0; |
| } |
| |
| static inline void setXSLTLoadCallBack(xsltDocLoaderFunc func, XSLTProcessor *processor, DocLoader *loader) |
| { |
| xsltSetLoaderFunc(func); |
| globalProcessor = processor; |
| globalDocLoader = loader; |
| } |
| |
| static int writeToQString(void *context, const char *buffer, int len) |
| { |
| DeprecatedString &resultOutput = *static_cast<DeprecatedString *>(context); |
| resultOutput += DeprecatedString::fromUtf8(buffer, len); |
| return len; |
| } |
| |
| static bool saveResultToString(xmlDocPtr resultDoc, xsltStylesheetPtr sheet, DeprecatedString &resultString) |
| { |
| xmlOutputBufferPtr outputBuf = xmlAllocOutputBuffer(0); |
| if (!outputBuf) |
| return false; |
| outputBuf->context = &resultString; |
| outputBuf->writecallback = writeToQString; |
| |
| int retval = xsltSaveResultTo(outputBuf, resultDoc, sheet); |
| xmlOutputBufferClose(outputBuf); |
| |
| return (retval >= 0); |
| } |
| |
| static inline void transformTextStringToXHTMLDocumentString(String &text) |
| { |
| // Modify the output so that it is a well-formed XHTML document with a <pre> tag enclosing the text. |
| text.replace('&', "&"); |
| text.replace('<', "<"); |
| text = "<?xml version=\"1.0\" encoding=\"UTF-8\"?>\n" |
| "<!DOCTYPE html PUBLIC \"-//W3C//DTD XHTML 1.0 Strict//EN\" \"http://www.w3.org/TR/xhtml1/DTD/xhtml1-strict.dtd\">\n" |
| "<html xmlns=\"http://www.w3.org/1999/xhtml\">\n" |
| "<head><title/></head>\n" |
| "<body>\n" |
| "<pre>" + text + "</pre>\n" |
| "</body>\n" |
| "</html>\n"; |
| } |
| |
| static const char **xsltParamArrayFromParameterMap(XSLTProcessor::ParameterMap& parameters) |
| { |
| if (parameters.isEmpty()) |
| return 0; |
| |
| const char **parameterArray = (const char **)fastMalloc(((parameters.size() * 2) + 1) * sizeof(char *)); |
| |
| XSLTProcessor::ParameterMap::iterator end = parameters.end(); |
| unsigned index = 0; |
| for (XSLTProcessor::ParameterMap::iterator it = parameters.begin(); it != end; ++it) { |
| parameterArray[index++] = strdup(it->first.utf8().data()); |
| parameterArray[index++] = strdup(it->second.utf8().data()); |
| } |
| parameterArray[index] = 0; |
| |
| return parameterArray; |
| } |
| |
| static void freeXsltParamArray(const char **params) |
| { |
| const char **temp = params; |
| if (!params) |
| return; |
| |
| while (*temp) { |
| free((void *)*(temp++)); // strdup returns malloc'd blocks, so we have to use free() here |
| free((void *)*(temp++)); |
| } |
| fastFree(params); |
| } |
| |
| |
| RefPtr<Document> XSLTProcessor::createDocumentFromSource(const DeprecatedString& sourceString, |
| const DeprecatedString& sourceEncoding, const DeprecatedString& sourceMIMEType, Node* sourceNode, Frame* frame) |
| { |
| RefPtr<Document> ownerDocument = sourceNode->document(); |
| bool sourceIsDocument = (sourceNode == ownerDocument.get()); |
| String documentSource = sourceString; |
| |
| RefPtr<Document> result; |
| if (sourceMIMEType == "text/plain") { |
| result = ownerDocument->implementation()->createDocument(frame); |
| transformTextStringToXHTMLDocumentString(documentSource); |
| } else |
| result = ownerDocument->implementation()->createDocument(sourceMIMEType, frame, false); |
| |
| // Before parsing, we need to save & detach the old document and get the new document |
| // in place. We have to do this only if we're rendering the result document. |
| if (frame) { |
| if (FrameView* view = frame->view()) |
| view->clear(); |
| result->setTransformSourceDocument(frame->document()); |
| frame->setDocument(result); |
| } |
| |
| result->open(); |
| if (sourceIsDocument) { |
| result->setURL(ownerDocument->URL()); |
| result->setBaseURL(ownerDocument->baseURL()); |
| } |
| result->determineParseMode(documentSource); // Make sure we parse in the correct mode. |
| |
| RefPtr<TextResourceDecoder> decoder = new TextResourceDecoder(sourceMIMEType); |
| decoder->setEncoding(sourceEncoding.isEmpty() ? UTF8Encoding() : TextEncoding(sourceEncoding), TextResourceDecoder::EncodingFromXMLHeader); |
| result->setDecoder(decoder.get()); |
| |
| result->write(documentSource); |
| result->finishParsing(); |
| result->close(); |
| |
| return result; |
| } |
| |
| static inline RefPtr<DocumentFragment> createFragmentFromSource(DeprecatedString sourceString, DeprecatedString sourceMIMEType, Node *sourceNode, Document *outputDoc) |
| { |
| RefPtr<DocumentFragment> fragment = new DocumentFragment(outputDoc); |
| |
| if (sourceMIMEType == "text/html") |
| parseHTMLDocumentFragment(sourceString, fragment.get()); |
| else if (sourceMIMEType == "text/plain") |
| fragment->addChild(new Text(outputDoc, sourceString)); |
| else { |
| bool successfulParse = parseXMLDocumentFragment(sourceString, fragment.get(), outputDoc->documentElement()); |
| if (!successfulParse) |
| return 0; |
| } |
| |
| // FIXME: Do we need to mess with URLs here? |
| |
| return fragment; |
| } |
| |
| static xsltStylesheetPtr xsltStylesheetPointer(RefPtr<XSLStyleSheet> &cachedStylesheet, Node *stylesheetRootNode) |
| { |
| if (!cachedStylesheet && stylesheetRootNode) { |
| cachedStylesheet = new XSLStyleSheet(stylesheetRootNode->parent() ? stylesheetRootNode->parent() : stylesheetRootNode, stylesheetRootNode->document()->URL()); |
| cachedStylesheet->parseString(createMarkup(stylesheetRootNode)); |
| } |
| |
| if (!cachedStylesheet || !cachedStylesheet->document()) |
| return 0; |
| |
| return cachedStylesheet->compileStyleSheet(); |
| } |
| |
| static inline xmlDocPtr xmlDocPtrFromNode(Node *sourceNode, bool &shouldDelete) |
| { |
| RefPtr<Document> ownerDocument = sourceNode->document(); |
| bool sourceIsDocument = (sourceNode == ownerDocument.get()); |
| |
| xmlDocPtr sourceDoc = 0; |
| if (sourceIsDocument) |
| sourceDoc = (xmlDocPtr)ownerDocument->transformSource(); |
| if (!sourceDoc) { |
| sourceDoc = (xmlDocPtr)xmlDocPtrForString(ownerDocument->docLoader(), createMarkup(sourceNode), sourceIsDocument ? ownerDocument->URL() : DeprecatedString()); |
| shouldDelete = (sourceDoc != 0); |
| } |
| return sourceDoc; |
| } |
| |
| static inline DeprecatedString resultMIMEType(xmlDocPtr resultDoc, xsltStylesheetPtr sheet) |
| { |
| // There are three types of output we need to be able to deal with: |
| // HTML (create an HTML document), XML (create an XML document), |
| // and text (wrap in a <pre> and create an XML document). |
| |
| const xmlChar *resultType = 0; |
| XSLT_GET_IMPORT_PTR(resultType, sheet, method); |
| if (resultType == 0 && resultDoc->type == XML_HTML_DOCUMENT_NODE) |
| resultType = (const xmlChar *)"html"; |
| |
| if (xmlStrEqual(resultType, (const xmlChar *)"html")) |
| return DeprecatedString("text/html"); |
| else if (xmlStrEqual(resultType, (const xmlChar *)"text")) |
| return DeprecatedString("text/plain"); |
| |
| return DeprecatedString("application/xml"); |
| } |
| |
| bool XSLTProcessor::transformToString(Node *sourceNode, DeprecatedString &mimeType, DeprecatedString &resultString, DeprecatedString &resultEncoding) |
| { |
| RefPtr<Document> ownerDocument = sourceNode->document(); |
| |
| setXSLTLoadCallBack(docLoaderFunc, this, ownerDocument->docLoader()); |
| xsltStylesheetPtr sheet = xsltStylesheetPointer(m_stylesheet, m_stylesheetRootNode.get()); |
| if (!sheet) { |
| setXSLTLoadCallBack(0, 0, 0); |
| return false; |
| } |
| m_stylesheet->clearDocuments(); |
| |
| xmlChar* origMethod = sheet->method; |
| if (!origMethod && mimeType == "text/html") |
| sheet->method = (xmlChar*)"html"; |
| |
| bool success = false; |
| bool shouldFreeSourceDoc = false; |
| if (xmlDocPtr sourceDoc = xmlDocPtrFromNode(sourceNode, shouldFreeSourceDoc)) { |
| // The XML declaration would prevent parsing the result as a fragment, and it's not needed even for documents, |
| // as the result of this function is always immediately parsed. |
| sheet->omitXmlDeclaration = true; |
| |
| xsltTransformContextPtr transformContext = xsltNewTransformContext(sheet, sourceDoc); |
| registerXSLTExtensions(transformContext); |
| |
| // This is a workaround for a bug in libxslt. |
| // The bug has been fixed in version 1.1.13, so once we ship that this can be removed. |
| if (transformContext->globalVars == NULL) |
| transformContext->globalVars = xmlHashCreate(20); |
| |
| const char **params = xsltParamArrayFromParameterMap(m_parameters); |
| xsltQuoteUserParams(transformContext, params); |
| xmlDocPtr resultDoc = xsltApplyStylesheetUser(sheet, sourceDoc, 0, 0, 0, transformContext); |
| |
| xsltFreeTransformContext(transformContext); |
| freeXsltParamArray(params); |
| |
| if (shouldFreeSourceDoc) |
| xmlFreeDoc(sourceDoc); |
| |
| if (success = saveResultToString(resultDoc, sheet, resultString)) { |
| mimeType = resultMIMEType(resultDoc, sheet); |
| resultEncoding = (char *)resultDoc->encoding; |
| } |
| xmlFreeDoc(resultDoc); |
| } |
| |
| sheet->method = origMethod; |
| setXSLTLoadCallBack(0, 0, 0); |
| xsltFreeStylesheet(sheet); |
| m_stylesheet = 0; |
| |
| return success; |
| } |
| |
| RefPtr<Document> XSLTProcessor::transformToDocument(Node *sourceNode) |
| { |
| DeprecatedString resultMIMEType; |
| DeprecatedString resultString; |
| DeprecatedString resultEncoding; |
| if (!transformToString(sourceNode, resultMIMEType, resultString, resultEncoding)) |
| return 0; |
| return createDocumentFromSource(resultString, resultEncoding, resultMIMEType, sourceNode, 0); |
| } |
| |
| RefPtr<DocumentFragment> XSLTProcessor::transformToFragment(Node* sourceNode, Document* outputDoc) |
| { |
| DeprecatedString resultMIMEType; |
| DeprecatedString resultString; |
| DeprecatedString resultEncoding; |
| |
| // If the output document is HTML, default to HTML method. |
| if (outputDoc->isHTMLDocument()) |
| resultMIMEType = "text/html"; |
| |
| if (!transformToString(sourceNode, resultMIMEType, resultString, resultEncoding)) |
| return 0; |
| return createFragmentFromSource(resultString, resultMIMEType, sourceNode, outputDoc); |
| } |
| |
| void XSLTProcessor::setParameter(const String& namespaceURI, const String& localName, const String& value) |
| { |
| // FIXME: namespace support? |
| // should make a QualifiedName here but we'd have to expose the impl |
| m_parameters.set(localName, value); |
| } |
| |
| String XSLTProcessor::getParameter(const String& namespaceURI, const String& localName) const |
| { |
| // FIXME: namespace support? |
| // should make a QualifiedName here but we'd have to expose the impl |
| return m_parameters.get(localName); |
| } |
| |
| void XSLTProcessor::removeParameter(const String& namespaceURI, const String& localName) |
| { |
| // FIXME: namespace support? |
| m_parameters.remove(localName); |
| } |
| |
| } // namespace WebCore |
| |
| #endif // ENABLE(XSLT) |
