--- /dev/null Thu Jan 01 00:00:00 1970 +0000
+++ b/WebCore/dom/XMLDocumentParserLibxml2.cpp Fri Sep 17 09:02:29 2010 +0300
@@ -0,0 +1,1446 @@
+/*
+ * Copyright (C) 2000 Peter Kelly (pmk@post.com)
+ * Copyright (C) 2005, 2006, 2008 Apple Inc. All rights reserved.
+ * Copyright (C) 2006 Alexey Proskuryakov (ap@webkit.org)
+ * Copyright (C) 2007 Samuel Weinig (sam@webkit.org)
+ * Copyright (C) 2008 Nokia Corporation and/or its subsidiary(-ies)
+ * Copyright (C) 2008 Holger Hans Peter Freyther
+ * Copyright (C) 2008, 2009 Torch Mobile Inc. All rights reserved. (http://www.torchmobile.com/)
+ *
+ * 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"
+#include "XMLDocumentParser.h"
+
+#include "CDATASection.h"
+#include "CachedScript.h"
+#include "Comment.h"
+#include "DocLoader.h"
+#include "Document.h"
+#include "DocumentFragment.h"
+#include "DocumentType.h"
+#include "Frame.h"
+#include "FrameLoader.h"
+#include "FrameView.h"
+#include "HTMLLinkElement.h"
+#include "HTMLStyleElement.h"
+#include "LegacyHTMLDocumentParser.h" // for decodeNamedEntity
+#include "ProcessingInstruction.h"
+#include "ResourceError.h"
+#include "ResourceHandle.h"
+#include "ResourceRequest.h"
+#include "ResourceResponse.h"
+#include "ScriptElement.h"
+#include "ScriptSourceCode.h"
+#include "ScriptValue.h"
+#include "TextResourceDecoder.h"
+#include "TransformSource.h"
+#include "XMLNSNames.h"
+#include "XMLDocumentParserScope.h"
+#include <libxml/parser.h>
+#include <libxml/parserInternals.h>
+#include <wtf/text/CString.h>
+#include <wtf/StringExtras.h>
+#include <wtf/Threading.h>
+#include <wtf/UnusedParam.h>
+#include <wtf/Vector.h>
+
+#if ENABLE(XSLT)
+#include <libxslt/xslt.h>
+#endif
+
+#if ENABLE(XHTMLMP)
+#include "HTMLNames.h"
+#include "HTMLScriptElement.h"
+#endif
+
+using namespace std;
+
+namespace WebCore {
+
+class PendingCallbacks : public Noncopyable {
+public:
+ ~PendingCallbacks()
+ {
+ deleteAllValues(m_callbacks);
+ }
+
+ void appendStartElementNSCallback(const xmlChar* xmlLocalName, const xmlChar* xmlPrefix, const xmlChar* xmlURI, int nb_namespaces,
+ const xmlChar** namespaces, int nb_attributes, int nb_defaulted, const xmlChar** attributes)
+ {
+ PendingStartElementNSCallback* callback = new PendingStartElementNSCallback;
+
+ callback->xmlLocalName = xmlStrdup(xmlLocalName);
+ callback->xmlPrefix = xmlStrdup(xmlPrefix);
+ callback->xmlURI = xmlStrdup(xmlURI);
+ callback->nb_namespaces = nb_namespaces;
+ callback->namespaces = static_cast<xmlChar**>(xmlMalloc(sizeof(xmlChar*) * nb_namespaces * 2));
+ for (int i = 0; i < nb_namespaces * 2 ; i++)
+ callback->namespaces[i] = xmlStrdup(namespaces[i]);
+ callback->nb_attributes = nb_attributes;
+ callback->nb_defaulted = nb_defaulted;
+ callback->attributes = static_cast<xmlChar**>(xmlMalloc(sizeof(xmlChar*) * nb_attributes * 5));
+ for (int i = 0; i < nb_attributes; i++) {
+ // Each attribute has 5 elements in the array:
+ // name, prefix, uri, value and an end pointer.
+
+ for (int j = 0; j < 3; j++)
+ callback->attributes[i * 5 + j] = xmlStrdup(attributes[i * 5 + j]);
+
+ int len = attributes[i * 5 + 4] - attributes[i * 5 + 3];
+
+ callback->attributes[i * 5 + 3] = xmlStrndup(attributes[i * 5 + 3], len);
+ callback->attributes[i * 5 + 4] = callback->attributes[i * 5 + 3] + len;
+ }
+
+ m_callbacks.append(callback);
+ }
+
+ void appendEndElementNSCallback()
+ {
+ PendingEndElementNSCallback* callback = new PendingEndElementNSCallback;
+
+ m_callbacks.append(callback);
+ }
+
+ void appendCharactersCallback(const xmlChar* s, int len)
+ {
+ PendingCharactersCallback* callback = new PendingCharactersCallback;
+
+ callback->s = xmlStrndup(s, len);
+ callback->len = len;
+
+ m_callbacks.append(callback);
+ }
+
+ void appendProcessingInstructionCallback(const xmlChar* target, const xmlChar* data)
+ {
+ PendingProcessingInstructionCallback* callback = new PendingProcessingInstructionCallback;
+
+ callback->target = xmlStrdup(target);
+ callback->data = xmlStrdup(data);
+
+ m_callbacks.append(callback);
+ }
+
+ void appendCDATABlockCallback(const xmlChar* s, int len)
+ {
+ PendingCDATABlockCallback* callback = new PendingCDATABlockCallback;
+
+ callback->s = xmlStrndup(s, len);
+ callback->len = len;
+
+ m_callbacks.append(callback);
+ }
+
+ void appendCommentCallback(const xmlChar* s)
+ {
+ PendingCommentCallback* callback = new PendingCommentCallback;
+
+ callback->s = xmlStrdup(s);
+
+ m_callbacks.append(callback);
+ }
+
+ void appendInternalSubsetCallback(const xmlChar* name, const xmlChar* externalID, const xmlChar* systemID)
+ {
+ PendingInternalSubsetCallback* callback = new PendingInternalSubsetCallback;
+
+ callback->name = xmlStrdup(name);
+ callback->externalID = xmlStrdup(externalID);
+ callback->systemID = xmlStrdup(systemID);
+
+ m_callbacks.append(callback);
+ }
+
+ void appendErrorCallback(XMLDocumentParser::ErrorType type, const xmlChar* message, int lineNumber, int columnNumber)
+ {
+ PendingErrorCallback* callback = new PendingErrorCallback;
+
+ callback->message = xmlStrdup(message);
+ callback->type = type;
+ callback->lineNumber = lineNumber;
+ callback->columnNumber = columnNumber;
+
+ m_callbacks.append(callback);
+ }
+
+ void callAndRemoveFirstCallback(XMLDocumentParser* parser)
+ {
+ OwnPtr<PendingCallback> callback(m_callbacks.takeFirst());
+ callback->call(parser);
+ }
+
+ bool isEmpty() const { return m_callbacks.isEmpty(); }
+
+private:
+ struct PendingCallback {
+ virtual ~PendingCallback() { }
+ virtual void call(XMLDocumentParser* parser) = 0;
+ };
+
+ struct PendingStartElementNSCallback : public PendingCallback {
+ virtual ~PendingStartElementNSCallback()
+ {
+ xmlFree(xmlLocalName);
+ xmlFree(xmlPrefix);
+ xmlFree(xmlURI);
+ for (int i = 0; i < nb_namespaces * 2; i++)
+ xmlFree(namespaces[i]);
+ xmlFree(namespaces);
+ for (int i = 0; i < nb_attributes; i++)
+ for (int j = 0; j < 4; j++)
+ xmlFree(attributes[i * 5 + j]);
+ xmlFree(attributes);
+ }
+
+ virtual void call(XMLDocumentParser* parser)
+ {
+ parser->startElementNs(xmlLocalName, xmlPrefix, xmlURI,
+ nb_namespaces, const_cast<const xmlChar**>(namespaces),
+ nb_attributes, nb_defaulted, const_cast<const xmlChar**>(attributes));
+ }
+
+ xmlChar* xmlLocalName;
+ xmlChar* xmlPrefix;
+ xmlChar* xmlURI;
+ int nb_namespaces;
+ xmlChar** namespaces;
+ int nb_attributes;
+ int nb_defaulted;
+ xmlChar** attributes;
+ };
+
+ struct PendingEndElementNSCallback : public PendingCallback {
+ virtual void call(XMLDocumentParser* parser)
+ {
+ parser->endElementNs();
+ }
+ };
+
+ struct PendingCharactersCallback : public PendingCallback {
+ virtual ~PendingCharactersCallback()
+ {
+ xmlFree(s);
+ }
+
+ virtual void call(XMLDocumentParser* parser)
+ {
+ parser->characters(s, len);
+ }
+
+ xmlChar* s;
+ int len;
+ };
+
+ struct PendingProcessingInstructionCallback : public PendingCallback {
+ virtual ~PendingProcessingInstructionCallback()
+ {
+ xmlFree(target);
+ xmlFree(data);
+ }
+
+ virtual void call(XMLDocumentParser* parser)
+ {
+ parser->processingInstruction(target, data);
+ }
+
+ xmlChar* target;
+ xmlChar* data;
+ };
+
+ struct PendingCDATABlockCallback : public PendingCallback {
+ virtual ~PendingCDATABlockCallback()
+ {
+ xmlFree(s);
+ }
+
+ virtual void call(XMLDocumentParser* parser)
+ {
+ parser->cdataBlock(s, len);
+ }
+
+ xmlChar* s;
+ int len;
+ };
+
+ struct PendingCommentCallback : public PendingCallback {
+ virtual ~PendingCommentCallback()
+ {
+ xmlFree(s);
+ }
+
+ virtual void call(XMLDocumentParser* parser)
+ {
+ parser->comment(s);
+ }
+
+ xmlChar* s;
+ };
+
+ struct PendingInternalSubsetCallback : public PendingCallback {
+ virtual ~PendingInternalSubsetCallback()
+ {
+ xmlFree(name);
+ xmlFree(externalID);
+ xmlFree(systemID);
+ }
+
+ virtual void call(XMLDocumentParser* parser)
+ {
+ parser->internalSubset(name, externalID, systemID);
+ }
+
+ xmlChar* name;
+ xmlChar* externalID;
+ xmlChar* systemID;
+ };
+
+ struct PendingErrorCallback: public PendingCallback {
+ virtual ~PendingErrorCallback()
+ {
+ xmlFree(message);
+ }
+
+ virtual void call(XMLDocumentParser* parser)
+ {
+ parser->handleError(type, reinterpret_cast<char*>(message), lineNumber, columnNumber);
+ }
+
+ XMLDocumentParser::ErrorType type;
+ xmlChar* message;
+ int lineNumber;
+ int columnNumber;
+ };
+
+ Deque<PendingCallback*> m_callbacks;
+};
+// --------------------------------
+
+static int globalDescriptor = 0;
+static ThreadIdentifier libxmlLoaderThread = 0;
+
+static int matchFunc(const char*)
+{
+ // Only match loads initiated due to uses of libxml2 from within XMLDocumentParser to avoid
+ // interfering with client applications that also use libxml2. http://bugs.webkit.org/show_bug.cgi?id=17353
+ return XMLDocumentParserScope::currentDocLoader && currentThread() == libxmlLoaderThread;
+}
+
+class OffsetBuffer {
+public:
+ OffsetBuffer(const Vector<char>& b) : m_buffer(b), m_currentOffset(0) { }
+
+ int readOutBytes(char* outputBuffer, unsigned askedToRead)
+ {
+ unsigned bytesLeft = m_buffer.size() - m_currentOffset;
+ unsigned lenToCopy = min(askedToRead, bytesLeft);
+ if (lenToCopy) {
+ memcpy(outputBuffer, m_buffer.data() + m_currentOffset, lenToCopy);
+ m_currentOffset += lenToCopy;
+ }
+ return lenToCopy;
+ }
+
+private:
+ Vector<char> m_buffer;
+ unsigned m_currentOffset;
+};
+
+static bool shouldAllowExternalLoad(const KURL& url)
+{
+ String urlString = url.string();
+
+ // On non-Windows platforms libxml asks for this URL, the
+ // "XML_XML_DEFAULT_CATALOG", on initialization.
+ if (urlString == "file:///etc/xml/catalog")
+ return false;
+
+ // On Windows, libxml computes a URL relative to where its DLL resides.
+ if (urlString.startsWith("file:///", false) && urlString.endsWith("/etc/catalog", false))
+ return false;
+
+ // The most common DTD. There isn't much point in hammering www.w3c.org
+ // by requesting this URL for every XHTML document.
+ if (urlString.startsWith("http://www.w3.org/TR/xhtml", false))
+ return false;
+
+ // Similarly, there isn't much point in requesting the SVG DTD.
+ if (urlString.startsWith("http://www.w3.org/Graphics/SVG", false))
+ return false;
+
+ // The libxml doesn't give us a lot of context for deciding whether to
+ // allow this request. In the worst case, this load could be for an
+ // external entity and the resulting document could simply read the
+ // retrieved content. If we had more context, we could potentially allow
+ // the parser to load a DTD. As things stand, we take the conservative
+ // route and allow same-origin requests only.
+ if (!XMLDocumentParserScope::currentDocLoader->doc()->securityOrigin()->canRequest(url)) {
+ XMLDocumentParserScope::currentDocLoader->printAccessDeniedMessage(url);
+ return false;
+ }
+
+ return true;
+}
+
+static void* openFunc(const char* uri)
+{
+ ASSERT(XMLDocumentParserScope::currentDocLoader);
+ ASSERT(currentThread() == libxmlLoaderThread);
+
+ KURL url(KURL(), uri);
+
+ if (!shouldAllowExternalLoad(url))
+ return &globalDescriptor;
+
+ ResourceError error;
+ ResourceResponse response;
+ Vector<char> data;
+
+
+ {
+ DocLoader* docLoader = XMLDocumentParserScope::currentDocLoader;
+ XMLDocumentParserScope scope(0);
+ // FIXME: We should restore the original global error handler as well.
+
+ if (docLoader->frame())
+ docLoader->frame()->loader()->loadResourceSynchronously(url, AllowStoredCredentials, error, response, data);
+ }
+
+ // We have to check the URL again after the load to catch redirects.
+ // See <https://bugs.webkit.org/show_bug.cgi?id=21963>.
+ if (!shouldAllowExternalLoad(response.url()))
+ return &globalDescriptor;
+
+ return new OffsetBuffer(data);
+}
+
+static int readFunc(void* context, char* buffer, int len)
+{
+ // Do 0-byte reads in case of a null descriptor
+ if (context == &globalDescriptor)
+ return 0;
+
+ OffsetBuffer* data = static_cast<OffsetBuffer*>(context);
+ return data->readOutBytes(buffer, len);
+}
+
+static int writeFunc(void*, const char*, int)
+{
+ // Always just do 0-byte writes
+ return 0;
+}
+
+static int closeFunc(void* context)
+{
+ if (context != &globalDescriptor) {
+ OffsetBuffer* data = static_cast<OffsetBuffer*>(context);
+ delete data;
+ }
+ return 0;
+}
+
+#if ENABLE(XSLT)
+static void errorFunc(void*, const char*, ...)
+{
+ // FIXME: It would be nice to display error messages somewhere.
+}
+#endif
+
+static bool didInit = false;
+
+PassRefPtr<XMLParserContext> XMLParserContext::createStringParser(xmlSAXHandlerPtr handlers, void* userData)
+{
+ if (!didInit) {
+ xmlInitParser();
+ xmlRegisterInputCallbacks(matchFunc, openFunc, readFunc, closeFunc);
+ xmlRegisterOutputCallbacks(matchFunc, openFunc, writeFunc, closeFunc);
+ libxmlLoaderThread = currentThread();
+ didInit = true;
+ }
+
+ xmlParserCtxtPtr parser = xmlCreatePushParserCtxt(handlers, 0, 0, 0, 0);
+ parser->_private = userData;
+ parser->replaceEntities = true;
+ const UChar BOM = 0xFEFF;
+ const unsigned char BOMHighByte = *reinterpret_cast<const unsigned char*>(&BOM);
+ xmlSwitchEncoding(parser, BOMHighByte == 0xFF ? XML_CHAR_ENCODING_UTF16LE : XML_CHAR_ENCODING_UTF16BE);
+
+ return adoptRef(new XMLParserContext(parser));
+}
+
+
+// Chunk should be encoded in UTF-8
+PassRefPtr<XMLParserContext> XMLParserContext::createMemoryParser(xmlSAXHandlerPtr handlers, void* userData, const char* chunk)
+{
+ if (!didInit) {
+ xmlInitParser();
+ xmlRegisterInputCallbacks(matchFunc, openFunc, readFunc, closeFunc);
+ xmlRegisterOutputCallbacks(matchFunc, openFunc, writeFunc, closeFunc);
+ libxmlLoaderThread = currentThread();
+ didInit = true;
+ }
+
+ xmlParserCtxtPtr parser = xmlCreateMemoryParserCtxt(chunk, xmlStrlen((const xmlChar*)chunk));
+
+ if (!parser)
+ return 0;
+
+ // Copy the sax handler
+ memcpy(parser->sax, handlers, sizeof(xmlSAXHandler));
+
+ // Set parser options.
+ // XML_PARSE_NODICT: default dictionary option.
+ // XML_PARSE_NOENT: force entities substitutions.
+ xmlCtxtUseOptions(parser, XML_PARSE_NODICT | XML_PARSE_NOENT);
+
+ // Internal initialization
+ parser->sax2 = 1;
+ parser->instate = XML_PARSER_CONTENT; // We are parsing a CONTENT
+ parser->depth = 0;
+ parser->str_xml = xmlDictLookup(parser->dict, BAD_CAST "xml", 3);
+ parser->str_xmlns = xmlDictLookup(parser->dict, BAD_CAST "xmlns", 5);
+ parser->str_xml_ns = xmlDictLookup(parser->dict, XML_XML_NAMESPACE, 36);
+ parser->_private = userData;
+
+ return adoptRef(new XMLParserContext(parser));
+}
+
+// --------------------------------
+
+XMLDocumentParser::XMLDocumentParser(Document* document, FrameView* frameView)
+ : ScriptableDocumentParser(document)
+ , m_view(frameView)
+ , m_context(0)
+ , m_pendingCallbacks(new PendingCallbacks)
+ , m_currentNode(document)
+ , m_sawError(false)
+ , m_sawXSLTransform(false)
+ , m_sawFirstElement(false)
+ , m_isXHTMLDocument(false)
+#if ENABLE(XHTMLMP)
+ , m_isXHTMLMPDocument(false)
+ , m_hasDocTypeDeclaration(false)
+#endif
+ , m_parserPaused(false)
+ , m_requestingScript(false)
+ , m_finishCalled(false)
+ , m_errorCount(0)
+ , m_lastErrorLine(0)
+ , m_lastErrorColumn(0)
+ , m_pendingScript(0)
+ , m_scriptStartLine(0)
+ , m_parsingFragment(false)
+ , m_scriptingPermission(FragmentScriptingAllowed)
+{
+}
+
+XMLDocumentParser::XMLDocumentParser(DocumentFragment* fragment, Element* parentElement, FragmentScriptingPermission scriptingPermission)
+ : ScriptableDocumentParser(fragment->document())
+ , m_view(0)
+ , m_context(0)
+ , m_pendingCallbacks(new PendingCallbacks)
+ , m_currentNode(fragment)
+ , m_sawError(false)
+ , m_sawXSLTransform(false)
+ , m_sawFirstElement(false)
+ , m_isXHTMLDocument(false)
+#if ENABLE(XHTMLMP)
+ , m_isXHTMLMPDocument(false)
+ , m_hasDocTypeDeclaration(false)
+#endif
+ , m_parserPaused(false)
+ , m_requestingScript(false)
+ , m_finishCalled(false)
+ , m_errorCount(0)
+ , m_lastErrorLine(0)
+ , m_lastErrorColumn(0)
+ , m_pendingScript(0)
+ , m_scriptStartLine(0)
+ , m_parsingFragment(true)
+ , m_scriptingPermission(scriptingPermission)
+{
+ fragment->ref();
+
+ // Add namespaces based on the parent node
+ Vector<Element*> elemStack;
+ while (parentElement) {
+ elemStack.append(parentElement);
+
+ Node* n = parentElement->parentNode();
+ if (!n || !n->isElementNode())
+ break;
+ parentElement = static_cast<Element*>(n);
+ }
+
+ if (elemStack.isEmpty())
+ return;
+
+ for (Element* element = elemStack.last(); !elemStack.isEmpty(); elemStack.removeLast()) {
+ if (NamedNodeMap* attrs = element->attributes()) {
+ for (unsigned i = 0; i < attrs->length(); i++) {
+ Attribute* attr = attrs->attributeItem(i);
+ if (attr->localName() == xmlnsAtom)
+ m_defaultNamespaceURI = attr->value();
+ else if (attr->prefix() == xmlnsAtom)
+ m_prefixToNamespaceMap.set(attr->localName(), attr->value());
+ }
+ }
+ }
+
+ // If the parent element is not in document tree, there may be no xmlns attribute; just default to the parent's namespace.
+ if (m_defaultNamespaceURI.isNull() && !parentElement->inDocument())
+ m_defaultNamespaceURI = parentElement->namespaceURI();
+}
+
+XMLParserContext::~XMLParserContext()
+{
+ if (m_context->myDoc)
+ xmlFreeDoc(m_context->myDoc);
+ xmlFreeParserCtxt(m_context);
+}
+
+XMLDocumentParser::~XMLDocumentParser()
+{
+ clearCurrentNodeStack();
+ if (m_pendingScript)
+ m_pendingScript->removeClient(this);
+}
+
+void XMLDocumentParser::doWrite(const String& parseString)
+{
+ if (!m_context)
+ initializeParserContext();
+
+ // Protect the libxml context from deletion during a callback
+ RefPtr<XMLParserContext> context = m_context;
+
+ // libXML throws an error if you try to switch the encoding for an empty string.
+ if (parseString.length()) {
+ // Hack around libxml2's lack of encoding overide support by manually
+ // resetting the encoding to UTF-16 before every chunk. Otherwise libxml
+ // will detect <?xml version="1.0" encoding="<encoding name>"?> blocks
+ // and switch encodings, causing the parse to fail.
+ const UChar BOM = 0xFEFF;
+ const unsigned char BOMHighByte = *reinterpret_cast<const unsigned char*>(&BOM);
+ xmlSwitchEncoding(context->context(), BOMHighByte == 0xFF ? XML_CHAR_ENCODING_UTF16LE : XML_CHAR_ENCODING_UTF16BE);
+
+ XMLDocumentParserScope scope(document()->docLoader());
+ xmlParseChunk(context->context(), reinterpret_cast<const char*>(parseString.characters()), sizeof(UChar) * parseString.length(), 0);
+ }
+
+ if (document()->decoder() && document()->decoder()->sawError()) {
+ // If the decoder saw an error, report it as fatal (stops parsing)
+ handleError(fatal, "Encoding error", context->context()->input->line, context->context()->input->col);
+ }
+
+ return;
+}
+
+static inline String toString(const xmlChar* str, unsigned len)
+{
+ return UTF8Encoding().decode(reinterpret_cast<const char*>(str), len);
+}
+
+static inline String toString(const xmlChar* str)
+{
+ if (!str)
+ return String();
+
+ return UTF8Encoding().decode(reinterpret_cast<const char*>(str), strlen(reinterpret_cast<const char*>(str)));
+}
+
+struct _xmlSAX2Namespace {
+ const xmlChar* prefix;
+ const xmlChar* uri;
+};
+typedef struct _xmlSAX2Namespace xmlSAX2Namespace;
+
+static inline void handleElementNamespaces(Element* newElement, const xmlChar** libxmlNamespaces, int nb_namespaces, ExceptionCode& ec, FragmentScriptingPermission scriptingPermission)
+{
+ xmlSAX2Namespace* namespaces = reinterpret_cast<xmlSAX2Namespace*>(libxmlNamespaces);
+ for (int i = 0; i < nb_namespaces; i++) {
+ AtomicString namespaceQName = xmlnsAtom;
+ String namespaceURI = toString(namespaces[i].uri);
+ if (namespaces[i].prefix)
+ namespaceQName = "xmlns:" + toString(namespaces[i].prefix);
+ newElement->setAttributeNS(XMLNSNames::xmlnsNamespaceURI, namespaceQName, namespaceURI, ec, scriptingPermission);
+ if (ec) // exception setting attributes
+ return;
+ }
+}
+
+struct _xmlSAX2Attributes {
+ const xmlChar* localname;
+ const xmlChar* prefix;
+ const xmlChar* uri;
+ const xmlChar* value;
+ const xmlChar* end;
+};
+typedef struct _xmlSAX2Attributes xmlSAX2Attributes;
+
+static inline void handleElementAttributes(Element* newElement, const xmlChar** libxmlAttributes, int nb_attributes, ExceptionCode& ec, FragmentScriptingPermission scriptingPermission)
+{
+ xmlSAX2Attributes* attributes = reinterpret_cast<xmlSAX2Attributes*>(libxmlAttributes);
+ for (int i = 0; i < nb_attributes; i++) {
+ String attrLocalName = toString(attributes[i].localname);
+ int valueLength = (int) (attributes[i].end - attributes[i].value);
+ String attrValue = toString(attributes[i].value, valueLength);
+ String attrPrefix = toString(attributes[i].prefix);
+ String attrURI = attrPrefix.isEmpty() ? String() : toString(attributes[i].uri);
+ String attrQName = attrPrefix.isEmpty() ? attrLocalName : attrPrefix + ":" + attrLocalName;
+
+ newElement->setAttributeNS(attrURI, attrQName, attrValue, ec, scriptingPermission);
+ if (ec) // exception setting attributes
+ return;
+ }
+}
+
+void XMLDocumentParser::startElementNs(const xmlChar* xmlLocalName, const xmlChar* xmlPrefix, const xmlChar* xmlURI, int nb_namespaces,
+ const xmlChar** libxmlNamespaces, int nb_attributes, int nb_defaulted, const xmlChar** libxmlAttributes)
+{
+ if (m_parserStopped)
+ return;
+
+ if (m_parserPaused) {
+ m_pendingCallbacks->appendStartElementNSCallback(xmlLocalName, xmlPrefix, xmlURI, nb_namespaces, libxmlNamespaces,
+ nb_attributes, nb_defaulted, libxmlAttributes);
+ return;
+ }
+
+#if ENABLE(XHTMLMP)
+ // check if the DOCTYPE Declaration of XHTMLMP document exists
+ if (!m_hasDocTypeDeclaration && document()->isXHTMLMPDocument()) {
+ handleError(fatal, "DOCTYPE declaration lost.", lineNumber(), columnNumber());
+ return;
+ }
+#endif
+
+ exitText();
+
+ String localName = toString(xmlLocalName);
+ String uri = toString(xmlURI);
+ String prefix = toString(xmlPrefix);
+
+ if (m_parsingFragment && uri.isNull()) {
+ if (!prefix.isNull())
+ uri = m_prefixToNamespaceMap.get(prefix);
+ else
+ uri = m_defaultNamespaceURI;
+ }
+
+#if ENABLE(XHTMLMP)
+ if (!m_sawFirstElement && isXHTMLMPDocument()) {
+ // As per the section 7.1 of OMA-WAP-XHTMLMP-V1_1-20061020-A.pdf,
+ // we should make sure that the root element MUST be 'html' and
+ // ensure the name of the default namespace on the root elment 'html'
+ // MUST be 'http://www.w3.org/1999/xhtml'
+ if (localName != HTMLNames::htmlTag.localName()) {
+ handleError(fatal, "XHTMLMP document expects 'html' as root element.", lineNumber(), columnNumber());
+ return;
+ }
+
+ if (uri.isNull()) {
+ m_defaultNamespaceURI = HTMLNames::xhtmlNamespaceURI;
+ uri = m_defaultNamespaceURI;
+ }
+ }
+#endif
+
+ bool isFirstElement = !m_sawFirstElement;
+ m_sawFirstElement = true;
+
+ QualifiedName qName(prefix, localName, uri);
+ RefPtr<Element> newElement = document()->createElement(qName, true);
+ if (!newElement) {
+ stopParsing();
+ return;
+ }
+
+ ExceptionCode ec = 0;
+ handleElementNamespaces(newElement.get(), libxmlNamespaces, nb_namespaces, ec, m_scriptingPermission);
+ if (ec) {
+ stopParsing();
+ return;
+ }
+
+ handleElementAttributes(newElement.get(), libxmlAttributes, nb_attributes, ec, m_scriptingPermission);
+ if (ec) {
+ stopParsing();
+ return;
+ }
+
+ newElement->beginParsingChildren();
+
+ ScriptElement* scriptElement = toScriptElement(newElement.get());
+ if (scriptElement)
+ m_scriptStartLine = lineNumber();
+
+ if (!m_currentNode->legacyParserAddChild(newElement.get())) {
+ stopParsing();
+ return;
+ }
+
+ pushCurrentNode(newElement.get());
+ if (m_view && !newElement->attached())
+ newElement->attach();
+
+ if (!m_parsingFragment && isFirstElement && document()->frame())
+ document()->frame()->loader()->dispatchDocumentElementAvailable();
+}
+
+void XMLDocumentParser::endElementNs()
+{
+ if (m_parserStopped)
+ return;
+
+ if (m_parserPaused) {
+ m_pendingCallbacks->appendEndElementNSCallback();
+ return;
+ }
+
+ exitText();
+
+ Node* n = m_currentNode;
+ n->finishParsingChildren();
+
+ if (m_scriptingPermission == FragmentScriptingNotAllowed && n->isElementNode() && toScriptElement(static_cast<Element*>(n))) {
+ popCurrentNode();
+ ExceptionCode ec;
+ n->remove(ec);
+ return;
+ }
+
+ if (!n->isElementNode() || !m_view) {
+ popCurrentNode();
+ return;
+ }
+
+ Element* element = static_cast<Element*>(n);
+
+ // The element's parent may have already been removed from document.
+ // Parsing continues in this case, but scripts aren't executed.
+ if (!element->inDocument()) {
+ popCurrentNode();
+ return;
+ }
+
+ ScriptElement* scriptElement = toScriptElement(element);
+ if (!scriptElement) {
+ popCurrentNode();
+ return;
+ }
+
+ // Don't load external scripts for standalone documents (for now).
+ ASSERT(!m_pendingScript);
+ m_requestingScript = true;
+
+#if ENABLE(XHTMLMP)
+ if (!scriptElement->shouldExecuteAsJavaScript())
+ document()->setShouldProcessNoscriptElement(true);
+ else
+#endif
+ {
+ String scriptHref = scriptElement->sourceAttributeValue();
+ if (!scriptHref.isEmpty()) {
+ // we have a src attribute
+ String scriptCharset = scriptElement->scriptCharset();
+ if (element->dispatchBeforeLoadEvent(scriptHref) &&
+ (m_pendingScript = document()->docLoader()->requestScript(scriptHref, scriptCharset))) {
+ m_scriptElement = element;
+ m_pendingScript->addClient(this);
+
+ // m_pendingScript will be 0 if script was already loaded and ref() executed it
+ if (m_pendingScript)
+ pauseParsing();
+ } else
+ m_scriptElement = 0;
+ } else
+ m_view->frame()->script()->executeScript(ScriptSourceCode(scriptElement->scriptContent(), document()->url(), m_scriptStartLine));
+ }
+ m_requestingScript = false;
+ popCurrentNode();
+}
+
+void XMLDocumentParser::characters(const xmlChar* s, int len)
+{
+ if (m_parserStopped)
+ return;
+
+ if (m_parserPaused) {
+ m_pendingCallbacks->appendCharactersCallback(s, len);
+ return;
+ }
+
+ if (m_currentNode->isTextNode() || enterText())
+ m_bufferedText.append(s, len);
+}
+
+void XMLDocumentParser::error(ErrorType type, const char* message, va_list args)
+{
+ if (m_parserStopped)
+ return;
+
+#if COMPILER(MSVC) || COMPILER(RVCT)
+ char m[1024];
+ vsnprintf(m, sizeof(m) - 1, message, args);
+#else
+ char* m;
+ if (vasprintf(&m, message, args) == -1)
+ return;
+#endif
+
+ if (m_parserPaused)
+ m_pendingCallbacks->appendErrorCallback(type, reinterpret_cast<const xmlChar*>(m), lineNumber(), columnNumber());
+ else
+ handleError(type, m, lineNumber(), columnNumber());
+
+#if !COMPILER(MSVC) && !COMPILER(RVCT)
+ free(m);
+#endif
+}
+
+void XMLDocumentParser::processingInstruction(const xmlChar* target, const xmlChar* data)
+{
+ if (m_parserStopped)
+ return;
+
+ if (m_parserPaused) {
+ m_pendingCallbacks->appendProcessingInstructionCallback(target, data);
+ return;
+ }
+
+ exitText();
+
+ // ### handle exceptions
+ int exception = 0;
+ RefPtr<ProcessingInstruction> pi = document()->createProcessingInstruction(
+ toString(target), toString(data), exception);
+ if (exception)
+ return;
+
+ pi->setCreatedByParser(true);
+
+ if (!m_currentNode->legacyParserAddChild(pi.get()))
+ return;
+ if (m_view && !pi->attached())
+ pi->attach();
+
+ pi->finishParsingChildren();
+
+#if ENABLE(XSLT)
+ m_sawXSLTransform = !m_sawFirstElement && pi->isXSL();
+ if (m_sawXSLTransform && !document()->transformSourceDocument())
+ stopParsing();
+#endif
+}
+
+void XMLDocumentParser::cdataBlock(const xmlChar* s, int len)
+{
+ if (m_parserStopped)
+ return;
+
+ if (m_parserPaused) {
+ m_pendingCallbacks->appendCDATABlockCallback(s, len);
+ return;
+ }
+
+ exitText();
+
+ RefPtr<Node> newNode = CDATASection::create(document(), toString(s, len));
+ if (!m_currentNode->legacyParserAddChild(newNode.get()))
+ return;
+ if (m_view && !newNode->attached())
+ newNode->attach();
+}
+
+void XMLDocumentParser::comment(const xmlChar* s)
+{
+ if (m_parserStopped)
+ return;
+
+ if (m_parserPaused) {
+ m_pendingCallbacks->appendCommentCallback(s);
+ return;
+ }
+
+ exitText();
+
+ RefPtr<Node> newNode = Comment::create(document(), toString(s));
+ m_currentNode->legacyParserAddChild(newNode.get());
+ if (m_view && !newNode->attached())
+ newNode->attach();
+}
+
+void XMLDocumentParser::startDocument(const xmlChar* version, const xmlChar* encoding, int standalone)
+{
+ ExceptionCode ec = 0;
+
+ if (version)
+ document()->setXMLVersion(toString(version), ec);
+ document()->setXMLStandalone(standalone == 1, ec); // possible values are 0, 1, and -1
+ if (encoding)
+ document()->setXMLEncoding(toString(encoding));
+}
+
+void XMLDocumentParser::endDocument()
+{
+ exitText();
+#if ENABLE(XHTMLMP)
+ m_hasDocTypeDeclaration = false;
+#endif
+}
+
+void XMLDocumentParser::internalSubset(const xmlChar* name, const xmlChar* externalID, const xmlChar* systemID)
+{
+ if (m_parserStopped)
+ return;
+
+ if (m_parserPaused) {
+ m_pendingCallbacks->appendInternalSubsetCallback(name, externalID, systemID);
+ return;
+ }
+
+ if (document()) {
+#if ENABLE(WML) || ENABLE(XHTMLMP)
+ String extId = toString(externalID);
+#endif
+#if ENABLE(WML)
+ if (isWMLDocument()
+ && extId != "-//WAPFORUM//DTD WML 1.3//EN"
+ && extId != "-//WAPFORUM//DTD WML 1.2//EN"
+ && extId != "-//WAPFORUM//DTD WML 1.1//EN"
+ && extId != "-//WAPFORUM//DTD WML 1.0//EN")
+ handleError(fatal, "Invalid DTD Public ID", lineNumber(), columnNumber());
+#endif
+#if ENABLE(XHTMLMP)
+ String dtdName = toString(name);
+ if (extId == "-//WAPFORUM//DTD XHTML Mobile 1.0//EN"
+ || extId == "-//WAPFORUM//DTD XHTML Mobile 1.1//EN") {
+ if (dtdName != HTMLNames::htmlTag.localName()) {
+ handleError(fatal, "Invalid DOCTYPE declaration, expected 'html' as root element.", lineNumber(), columnNumber());
+ return;
+ }
+
+ if (document()->isXHTMLMPDocument())
+ setIsXHTMLMPDocument(true);
+ else
+ setIsXHTMLDocument(true);
+
+ m_hasDocTypeDeclaration = true;
+ }
+#endif
+
+ document()->legacyParserAddChild(DocumentType::create(document(), toString(name), toString(externalID), toString(systemID)));
+ }
+}
+
+static inline XMLDocumentParser* getParser(void* closure)
+{
+ xmlParserCtxtPtr ctxt = static_cast<xmlParserCtxtPtr>(closure);
+ return static_cast<XMLDocumentParser*>(ctxt->_private);
+}
+
+// This is a hack around http://bugzilla.gnome.org/show_bug.cgi?id=159219
+// Otherwise libxml seems to call all the SAX callbacks twice for any replaced entity.
+static inline bool hackAroundLibXMLEntityBug(void* closure)
+{
+#if LIBXML_VERSION >= 20627
+ UNUSED_PARAM(closure);
+
+ // This bug has been fixed in libxml 2.6.27.
+ return false;
+#else
+ return static_cast<xmlParserCtxtPtr>(closure)->node;
+#endif
+}
+
+static void startElementNsHandler(void* closure, const xmlChar* localname, const xmlChar* prefix, const xmlChar* uri, int nb_namespaces, const xmlChar** namespaces, int nb_attributes, int nb_defaulted, const xmlChar** libxmlAttributes)
+{
+ if (hackAroundLibXMLEntityBug(closure))
+ return;
+
+ getParser(closure)->startElementNs(localname, prefix, uri, nb_namespaces, namespaces, nb_attributes, nb_defaulted, libxmlAttributes);
+}
+
+static void endElementNsHandler(void* closure, const xmlChar*, const xmlChar*, const xmlChar*)
+{
+ if (hackAroundLibXMLEntityBug(closure))
+ return;
+
+ getParser(closure)->endElementNs();
+}
+
+static void charactersHandler(void* closure, const xmlChar* s, int len)
+{
+ if (hackAroundLibXMLEntityBug(closure))
+ return;
+
+ getParser(closure)->characters(s, len);
+}
+
+static void processingInstructionHandler(void* closure, const xmlChar* target, const xmlChar* data)
+{
+ if (hackAroundLibXMLEntityBug(closure))
+ return;
+
+ getParser(closure)->processingInstruction(target, data);
+}
+
+static void cdataBlockHandler(void* closure, const xmlChar* s, int len)
+{
+ if (hackAroundLibXMLEntityBug(closure))
+ return;
+
+ getParser(closure)->cdataBlock(s, len);
+}
+
+static void commentHandler(void* closure, const xmlChar* comment)
+{
+ if (hackAroundLibXMLEntityBug(closure))
+ return;
+
+ getParser(closure)->comment(comment);
+}
+
+WTF_ATTRIBUTE_PRINTF(2, 3)
+static void warningHandler(void* closure, const char* message, ...)
+{
+ va_list args;
+ va_start(args, message);
+ getParser(closure)->error(XMLDocumentParser::warning, message, args);
+ va_end(args);
+}
+
+WTF_ATTRIBUTE_PRINTF(2, 3)
+static void fatalErrorHandler(void* closure, const char* message, ...)
+{
+ va_list args;
+ va_start(args, message);
+ getParser(closure)->error(XMLDocumentParser::fatal, message, args);
+ va_end(args);
+}
+
+WTF_ATTRIBUTE_PRINTF(2, 3)
+static void normalErrorHandler(void* closure, const char* message, ...)
+{
+ va_list args;
+ va_start(args, message);
+ getParser(closure)->error(XMLDocumentParser::nonFatal, message, args);
+ va_end(args);
+}
+
+// Using a static entity and marking it XML_INTERNAL_PREDEFINED_ENTITY is
+// a hack to avoid malloc/free. Using a global variable like this could cause trouble
+// if libxml implementation details were to change
+static xmlChar sharedXHTMLEntityResult[5] = {0, 0, 0, 0, 0};
+
+static xmlEntityPtr sharedXHTMLEntity()
+{
+ static xmlEntity entity;
+ if (!entity.type) {
+ entity.type = XML_ENTITY_DECL;
+ entity.orig = sharedXHTMLEntityResult;
+ entity.content = sharedXHTMLEntityResult;
+ entity.etype = XML_INTERNAL_PREDEFINED_ENTITY;
+ }
+ return &entity;
+}
+
+static xmlEntityPtr getXHTMLEntity(const xmlChar* name)
+{
+ UChar c = decodeNamedEntity(reinterpret_cast<const char*>(name));
+ if (!c)
+ return 0;
+
+ CString value = String(&c, 1).utf8();
+ ASSERT(value.length() < 5);
+ xmlEntityPtr entity = sharedXHTMLEntity();
+ entity->length = value.length();
+ entity->name = name;
+ memcpy(sharedXHTMLEntityResult, value.data(), entity->length + 1);
+
+ return entity;
+}
+
+static xmlEntityPtr getEntityHandler(void* closure, const xmlChar* name)
+{
+ xmlParserCtxtPtr ctxt = static_cast<xmlParserCtxtPtr>(closure);
+ xmlEntityPtr ent = xmlGetPredefinedEntity(name);
+ if (ent) {
+ ent->etype = XML_INTERNAL_PREDEFINED_ENTITY;
+ return ent;
+ }
+
+ ent = xmlGetDocEntity(ctxt->myDoc, name);
+ if (!ent && (getParser(closure)->isXHTMLDocument()
+#if ENABLE(XHTMLMP)
+ || getParser(closure)->isXHTMLMPDocument()
+#endif
+#if ENABLE(WML)
+ || getParser(closure)->isWMLDocument()
+#endif
+ )) {
+ ent = getXHTMLEntity(name);
+ if (ent)
+ ent->etype = XML_INTERNAL_GENERAL_ENTITY;
+ }
+
+ return ent;
+}
+
+static void startDocumentHandler(void* closure)
+{
+ xmlParserCtxt* ctxt = static_cast<xmlParserCtxt*>(closure);
+ getParser(closure)->startDocument(ctxt->version, ctxt->encoding, ctxt->standalone);
+ xmlSAX2StartDocument(closure);
+}
+
+static void endDocumentHandler(void* closure)
+{
+ getParser(closure)->endDocument();
+ xmlSAX2EndDocument(closure);
+}
+
+static void internalSubsetHandler(void* closure, const xmlChar* name, const xmlChar* externalID, const xmlChar* systemID)
+{
+ getParser(closure)->internalSubset(name, externalID, systemID);
+ xmlSAX2InternalSubset(closure, name, externalID, systemID);
+}
+
+static void externalSubsetHandler(void* closure, const xmlChar*, const xmlChar* externalId, const xmlChar*)
+{
+ String extId = toString(externalId);
+ if ((extId == "-//W3C//DTD XHTML 1.0 Transitional//EN")
+ || (extId == "-//W3C//DTD XHTML 1.1//EN")
+ || (extId == "-//W3C//DTD XHTML 1.0 Strict//EN")
+ || (extId == "-//W3C//DTD XHTML 1.0 Frameset//EN")
+ || (extId == "-//W3C//DTD XHTML Basic 1.0//EN")
+ || (extId == "-//W3C//DTD XHTML 1.1 plus MathML 2.0//EN")
+ || (extId == "-//W3C//DTD XHTML 1.1 plus MathML 2.0 plus SVG 1.1//EN")
+ || (extId == "-//WAPFORUM//DTD XHTML Mobile 1.0//EN")
+ )
+ getParser(closure)->setIsXHTMLDocument(true); // controls if we replace entities or not.
+}
+
+static void ignorableWhitespaceHandler(void*, const xmlChar*, int)
+{
+ // nothing to do, but we need this to work around a crasher
+ // http://bugzilla.gnome.org/show_bug.cgi?id=172255
+ // http://bugs.webkit.org/show_bug.cgi?id=5792
+}
+
+void XMLDocumentParser::initializeParserContext(const char* chunk)
+{
+ xmlSAXHandler sax;
+ memset(&sax, 0, sizeof(sax));
+
+ sax.error = normalErrorHandler;
+ sax.fatalError = fatalErrorHandler;
+ sax.characters = charactersHandler;
+ sax.processingInstruction = processingInstructionHandler;
+ sax.cdataBlock = cdataBlockHandler;
+ sax.comment = commentHandler;
+ sax.warning = warningHandler;
+ sax.startElementNs = startElementNsHandler;
+ sax.endElementNs = endElementNsHandler;
+ sax.getEntity = getEntityHandler;
+ sax.startDocument = startDocumentHandler;
+ sax.endDocument = endDocumentHandler;
+ sax.internalSubset = internalSubsetHandler;
+ sax.externalSubset = externalSubsetHandler;
+ sax.ignorableWhitespace = ignorableWhitespaceHandler;
+ sax.entityDecl = xmlSAX2EntityDecl;
+ sax.initialized = XML_SAX2_MAGIC;
+ m_parserStopped = false;
+ m_sawError = false;
+ m_sawXSLTransform = false;
+ m_sawFirstElement = false;
+
+ XMLDocumentParserScope scope(document()->docLoader());
+ if (m_parsingFragment)
+ m_context = XMLParserContext::createMemoryParser(&sax, this, chunk);
+ else
+ m_context = XMLParserContext::createStringParser(&sax, this);
+}
+
+void XMLDocumentParser::doEnd()
+{
+#if ENABLE(XSLT)
+ if (m_sawXSLTransform) {
+ void* doc = xmlDocPtrForString(document()->docLoader(), m_originalSourceForTransform, document()->url().string());
+ document()->setTransformSource(new TransformSource(doc));
+
+ document()->setParsing(false); // Make the doc think it's done, so it will apply xsl sheets.
+ document()->updateStyleSelector();
+ document()->setParsing(true);
+ m_parserStopped = true;
+ }
+#endif
+
+ if (m_parserStopped)
+ return;
+
+ if (m_context) {
+ // Tell libxml we're done.
+ {
+ XMLDocumentParserScope scope(document()->docLoader());
+ xmlParseChunk(context(), 0, 0, 1);
+ }
+
+ m_context = 0;
+ }
+}
+
+#if ENABLE(XSLT)
+void* xmlDocPtrForString(DocLoader* docLoader, const String& source, const String& url)
+{
+ if (source.isEmpty())
+ return 0;
+
+ // Parse in a single chunk into an xmlDocPtr
+ // FIXME: Hook up error handlers so that a failure to parse the main document results in
+ // good error messages.
+ const UChar BOM = 0xFEFF;
+ const unsigned char BOMHighByte = *reinterpret_cast<const unsigned char*>(&BOM);
+
+ XMLDocumentParserScope scope(docLoader, errorFunc, 0);
+ xmlDocPtr sourceDoc = xmlReadMemory(reinterpret_cast<const char*>(source.characters()),
+ source.length() * sizeof(UChar),
+ url.latin1().data(),
+ BOMHighByte == 0xFF ? "UTF-16LE" : "UTF-16BE",
+ XSLT_PARSE_OPTIONS);
+ return sourceDoc;
+}
+#endif
+
+int XMLDocumentParser::lineNumber() const
+{
+ return context() ? context()->input->line : 1;
+}
+
+int XMLDocumentParser::columnNumber() const
+{
+ return context() ? context()->input->col : 1;
+}
+
+void XMLDocumentParser::stopParsing()
+{
+ DocumentParser::stopParsing();
+ if (context())
+ xmlStopParser(context());
+}
+
+void XMLDocumentParser::resumeParsing()
+{
+ ASSERT(m_parserPaused);
+
+ m_parserPaused = false;
+
+ // First, execute any pending callbacks
+ while (!m_pendingCallbacks->isEmpty()) {
+ m_pendingCallbacks->callAndRemoveFirstCallback(this);
+
+ // A callback paused the parser
+ if (m_parserPaused)
+ return;
+ }
+
+ // Then, write any pending data
+ SegmentedString rest = m_pendingSrc;
+ m_pendingSrc.clear();
+ append(rest);
+
+ // Finally, if finish() has been called and write() didn't result
+ // in any further callbacks being queued, call end()
+ if (m_finishCalled && m_pendingCallbacks->isEmpty())
+ end();
+}
+
+// FIXME: This method should be possible to implement using the DocumentParser
+// API, instead of needing to grab at libxml2 state directly.
+bool XMLDocumentParser::parseDocumentFragment(const String& chunk, DocumentFragment* fragment, Element* parent, FragmentScriptingPermission scriptingPermission)
+{
+ if (!chunk.length())
+ return true;
+
+ XMLDocumentParser parser(fragment, parent, scriptingPermission);
+
+ CString chunkAsUtf8 = chunk.utf8();
+ parser.initializeParserContext(chunkAsUtf8.data());
+
+ xmlParseContent(parser.context());
+
+ parser.endDocument();
+
+ // Check if all the chunk has been processed.
+ long bytesProcessed = xmlByteConsumed(parser.context());
+ if (bytesProcessed == -1 || ((unsigned long)bytesProcessed) != chunkAsUtf8.length())
+ return false;
+
+ // No error if the chunk is well formed or it is not but we have no error.
+ return parser.context()->wellFormed || xmlCtxtGetLastError(parser.context()) == 0;
+}
+
+// --------------------------------
+
+struct AttributeParseState {
+ HashMap<String, String> attributes;
+ bool gotAttributes;
+};
+
+static void attributesStartElementNsHandler(void* closure, const xmlChar* xmlLocalName, const xmlChar* /*xmlPrefix*/,
+ const xmlChar* /*xmlURI*/, int /*nb_namespaces*/, const xmlChar** /*namespaces*/,
+ int nb_attributes, int /*nb_defaulted*/, const xmlChar** libxmlAttributes)
+{
+ if (strcmp(reinterpret_cast<const char*>(xmlLocalName), "attrs") != 0)
+ return;
+
+ xmlParserCtxtPtr ctxt = static_cast<xmlParserCtxtPtr>(closure);
+ AttributeParseState* state = static_cast<AttributeParseState*>(ctxt->_private);
+
+ state->gotAttributes = true;
+
+ xmlSAX2Attributes* attributes = reinterpret_cast<xmlSAX2Attributes*>(libxmlAttributes);
+ for (int i = 0; i < nb_attributes; i++) {
+ String attrLocalName = toString(attributes[i].localname);
+ int valueLength = (int) (attributes[i].end - attributes[i].value);
+ String attrValue = toString(attributes[i].value, valueLength);
+ String attrPrefix = toString(attributes[i].prefix);
+ String attrQName = attrPrefix.isEmpty() ? attrLocalName : attrPrefix + ":" + attrLocalName;
+
+ state->attributes.set(attrQName, attrValue);
+ }
+}
+
+HashMap<String, String> parseAttributes(const String& string, bool& attrsOK)
+{
+ AttributeParseState state;
+ state.gotAttributes = false;
+
+ xmlSAXHandler sax;
+ memset(&sax, 0, sizeof(sax));
+ sax.startElementNs = attributesStartElementNsHandler;
+ sax.initialized = XML_SAX2_MAGIC;
+ RefPtr<XMLParserContext> parser = XMLParserContext::createStringParser(&sax, &state);
+ String parseString = "<?xml version=\"1.0\"?><attrs " + string + " />";
+ xmlParseChunk(parser->context(), reinterpret_cast<const char*>(parseString.characters()), parseString.length() * sizeof(UChar), 1);
+ attrsOK = state.gotAttributes;
+ return state.attributes;
+}
+
+}