WebCore/dom/DOMImplementation.cpp - WebKit - Git at Google

 /*
  * Copyright (C) 1999 Lars Knoll (knoll@kde.org)
  *           (C) 1999 Antti Koivisto (koivisto@kde.org)
  *           (C) 2001 Dirk Mueller (mueller@kde.org)
  * Copyright (C) 2004, 2005, 2006, 2007, 2008 Apple Inc. All rights reserved.
  * Copyright (C) 2006 Samuel Weinig (sam@webkit.org)
  * 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 "DOMImplementation.h"

 #include "ContentType.h"
 #include "CSSStyleSheet.h"
 #include "DocumentType.h"
 #include "Element.h"
 #include "ExceptionCode.h"
 #include "Frame.h"
 #include "FTPDirectoryDocument.h"
 #include "HTMLDocument.h"
 #include "HTMLNames.h"
 #include "HTMLViewSourceDocument.h"
 #include "Image.h"
 #include "ImageDocument.h"
 #include "MediaDocument.h"
 #include "MediaList.h"
 #include "MediaPlayer.h"
 #include "MIMETypeRegistry.h"
 #include "Page.h"
 #include "PluginData.h"
 #include "PluginDocument.h"
 #include "RegularExpression.h"
 #include "Settings.h"
 #include "TextDocument.h"
 #include "XMLNames.h"
 #include <wtf/StdLibExtras.h>

 #if ENABLE(SVG)
 #include "SVGNames.h"
 #include "SVGDocument.h"
 #endif

 #if ENABLE(WML)
 #include "WMLNames.h"
 #include "WMLDocument.h"
 #endif

 namespace WebCore {

 #if ENABLE(SVG)

 typedef HashSet<String, CaseFoldingHash> FeatureSet;

 static void addString(FeatureSet& set, const char* string)
 {
     set.add(string);
 }

 static bool isSVG10Feature(const String &feature)
 {
     static bool initialized = false;
     DEFINE_STATIC_LOCAL(FeatureSet, svgFeatures, ());
     if (!initialized) {
 #if ENABLE(SVG_USE) && ENABLE(SVG_FOREIGN_OBJECT) && ENABLE(FILTERS) && ENABLE(SVG_FONTS)
         addString(svgFeatures, "svg");
         addString(svgFeatures, "svg.static");
 #endif
 //      addString(svgFeatures, "svg.animation");
 //      addString(svgFeatures, "svg.dynamic");
 //      addString(svgFeatures, "svg.dom.animation");
 //      addString(svgFeatures, "svg.dom.dynamic");
 #if ENABLE(SVG_USE) && ENABLE(SVG_FOREIGN_OBJECT) && ENABLE(FILTERS) && ENABLE(SVG_FONTS)
         addString(svgFeatures, "dom");
         addString(svgFeatures, "dom.svg");
         addString(svgFeatures, "dom.svg.static");
 #endif
 //      addString(svgFeatures, "svg.all");
 //      addString(svgFeatures, "dom.svg.all");
         initialized = true;
     }
     return svgFeatures.contains(feature);
 }

 static bool isSVG11Feature(const String &feature)
 {
     static bool initialized = false;
     DEFINE_STATIC_LOCAL(FeatureSet, svgFeatures, ());
     if (!initialized) {
         // Sadly, we cannot claim to implement any of the SVG 1.1 generic feature sets
         // lack of Font and Filter support.
         // http://bugs.webkit.org/show_bug.cgi?id=15480
 #if ENABLE(SVG_USE) && ENABLE(SVG_FOREIGN_OBJECT) && ENABLE(FILTERS) && ENABLE(SVG_FONTS)
         addString(svgFeatures, "SVG");
         addString(svgFeatures, "SVGDOM");
         addString(svgFeatures, "SVG-static");
         addString(svgFeatures, "SVGDOM-static");
 #endif
 #if ENABLE(SVG_ANIMATION)
         addString(svgFeatures, "SVG-animation");
         addString(svgFeatures, "SVGDOM-animation");
 #endif
 //      addString(svgFeatures, "SVG-dynamic);
 //      addString(svgFeatures, "SVGDOM-dynamic);
         addString(svgFeatures, "CoreAttribute");
 #if ENABLE(SVG_USE)
         addString(svgFeatures, "Structure");
         addString(svgFeatures, "BasicStructure");
 #endif
         addString(svgFeatures, "ContainerAttribute");
         addString(svgFeatures, "ConditionalProcessing");
         addString(svgFeatures, "Image");
         addString(svgFeatures, "Style");
         addString(svgFeatures, "ViewportAttribute");
         addString(svgFeatures, "Shape");
 //      addString(svgFeatures, "Text"); // requires altGlyph, bug 6426
         addString(svgFeatures, "BasicText");
         addString(svgFeatures, "PaintAttribute");
         addString(svgFeatures, "BasicPaintAttribute");
         addString(svgFeatures, "OpacityAttribute");
         addString(svgFeatures, "GraphicsAttribute");
         addString(svgFeatures, "BaseGraphicsAttribute");
         addString(svgFeatures, "Marker");
 //      addString(svgFeatures, "ColorProfile"); // requires color-profile, bug 6037
         addString(svgFeatures, "Gradient");
         addString(svgFeatures, "Pattern");
         addString(svgFeatures, "Clip");
         addString(svgFeatures, "BasicClip");
         addString(svgFeatures, "Mask");
 #if ENABLE(FILTERS)
 //      addString(svgFeatures, "Filter");
         addString(svgFeatures, "BasicFilter");
 #endif
         addString(svgFeatures, "DocumentEventsAttribute");
         addString(svgFeatures, "GraphicalEventsAttribute");
 //      addString(svgFeatures, "AnimationEventsAttribute");
         addString(svgFeatures, "Cursor");
         addString(svgFeatures, "Hyperlinking");
         addString(svgFeatures, "XlinkAttribute");
         addString(svgFeatures, "ExternalResourcesRequired");
 //      addString(svgFeatures, "View"); // buggy <view> support, bug 16962
         addString(svgFeatures, "Script");
 #if ENABLE(SVG_ANIMATION)
         addString(svgFeatures, "Animation");
 #endif
 #if ENABLE(SVG_FONTS)
         addString(svgFeatures, "Font");
         addString(svgFeatures, "BasicFont");
 #endif
 #if ENABLE(SVG_FOREIGN_OBJECT)
         addString(svgFeatures, "Extensibility");
 #endif
         initialized = true;
     }
     return svgFeatures.contains(feature);
 }
 #endif

 bool DOMImplementation::hasFeature(const String& feature, const String& version)
 {
     String lower = feature.lower();
     if (lower == "core" || lower == "html" || lower == "xml" || lower == "xhtml")
         return version.isEmpty() || version == "1.0" || version == "2.0";
     if (lower == "css"
             || lower == "css2"
             || lower == "events"
             || lower == "htmlevents"
             || lower == "mouseevents"
             || lower == "mutationevents"
             || lower == "range"
             || lower == "stylesheets"
             || lower == "traversal"
             || lower == "uievents"
             || lower == "views")
         return version.isEmpty() || version == "2.0";
     if (lower == "xpath" || lower == "textevents")
         return version.isEmpty() || version == "3.0";

 #if ENABLE(SVG)
     if ((version.isEmpty() || version == "1.1") && feature.startsWith("http://www.w3.org/tr/svg11/feature#", false)) {
         if (isSVG11Feature(feature.right(feature.length() - 35)))
             return true;
     }

     if ((version.isEmpty() || version == "1.0") && feature.startsWith("org.w3c.", false)) {
         if (isSVG10Feature(feature.right(feature.length() - 8)))
             return true;
     }
 #endif

     return false;
 }

 PassRefPtr<DocumentType> DOMImplementation::createDocumentType(const String& qualifiedName,
     const String& publicId, const String& systemId, ExceptionCode& ec)
 {
     String prefix, localName;
     if (!Document::parseQualifiedName(qualifiedName, prefix, localName, ec))
         return 0;

     return DocumentType::create(0, qualifiedName, publicId, systemId);
 }

 DOMImplementation* DOMImplementation::getInterface(const String& /*feature*/)
 {
     return 0;
 }

 PassRefPtr<Document> DOMImplementation::createDocument(const String& namespaceURI,
     const String& qualifiedName, DocumentType* doctype, ExceptionCode& ec)
 {
     // WRONG_DOCUMENT_ERR: Raised if doctype has already been used with a different document or was
     // created from a different implementation.
     bool shouldThrowWrongDocErr = false;
     if (doctype && doctype->document())
         shouldThrowWrongDocErr = true;

     RefPtr<Document> doc;
 #if ENABLE(SVG)
     if (namespaceURI == SVGNames::svgNamespaceURI)
         doc = SVGDocument::create(0);
     else
 #endif
 #if ENABLE(WML)
     if (namespaceURI == WMLNames::wmlNamespaceURI)
         doc = WMLDocument::create(0);
     else
 #endif
     if (namespaceURI == HTMLNames::xhtmlNamespaceURI)
         doc = Document::createXHTML(0);
     else
         doc = Document::create(0);

     // now get the interesting parts of the doctype
     if (doctype)
         doc->addChild(doctype);

     if (!qualifiedName.isEmpty()) {
         RefPtr<Node> documentElement = doc->createElementNS(namespaceURI, qualifiedName, ec);
         if (ec)
             return 0;
         doc->addChild(documentElement.release());
     }

     // Hixie's interpretation of the DOM Core spec suggests we should prefer
     // other exceptions to WRONG_DOCUMENT_ERR (based on order mentioned in spec)
     if (shouldThrowWrongDocErr) {
         ec = WRONG_DOCUMENT_ERR;
         return 0;
     }

     return doc.release();
 }

 PassRefPtr<CSSStyleSheet> DOMImplementation::createCSSStyleSheet(const String&, const String& media, ExceptionCode&)
 {
     // FIXME: Title should be set.
     // FIXME: Media could have wrong syntax, in which case we should generate an exception.
     RefPtr<CSSStyleSheet> sheet = CSSStyleSheet::create();
     sheet->setMedia(MediaList::createAllowingDescriptionSyntax(sheet.get(), media));
     return sheet.release();
 }

 PassRefPtr<Document> DOMImplementation::createDocument(Frame* frame)
 {
     return Document::create(frame);
 }

 PassRefPtr<HTMLDocument> DOMImplementation::createHTMLDocument(Frame* frame)
 {
     return HTMLDocument::create(frame);
 }

 bool DOMImplementation::isXMLMIMEType(const String& mimeType)
 {
     if (mimeType == "text/xml" || mimeType == "application/xml" || mimeType == "text/xsl")
         return true;
     static const char* const validChars = "[0-9a-zA-Z_\\-+~!$\\^{}|.%'`#&*]"; // per RFCs: 3023, 2045
     DEFINE_STATIC_LOCAL(RegularExpression, xmlTypeRegExp, (String("^") + validChars + "+/" + validChars + "+\\+xml$", TextCaseSensitive));
     return xmlTypeRegExp.match(mimeType) > -1;
 }

 bool DOMImplementation::isTextMIMEType(const String& mimeType)
 {
     if (MIMETypeRegistry::isSupportedJavaScriptMIMEType(mimeType) ||
         (mimeType.startsWith("text/") && mimeType != "text/html" &&
          mimeType != "text/xml" && mimeType != "text/xsl"))
         return true;

     return false;
 }

 PassRefPtr<HTMLDocument> DOMImplementation::createHTMLDocument(const String& title)
 {
     RefPtr<HTMLDocument> d = HTMLDocument::create(0);
     d->open();
     d->write("<!doctype html><html><head><title>" + title + "</title></head><body></body></html>");
     return d.release();
 }

 PassRefPtr<Document> DOMImplementation::createDocument(const String& type, Frame* frame, bool inViewSourceMode)
 {
     if (inViewSourceMode)
         return HTMLViewSourceDocument::create(frame, type);

     // Plugins cannot take HTML and XHTML from us, and we don't even need to initialize the plugin database for those.
     if (type == "text/html")
         return HTMLDocument::create(frame);
     if (type == "application/xhtml+xml"
 #if ENABLE(XHTMLMP)
         || type == "application/vnd.wap.xhtml+xml"
 #endif
         )
         return Document::createXHTML(frame);

 #if ENABLE(WML)
     if (type == "text/vnd.wap.wml" || type == "application/vnd.wap.wmlc")
         return WMLDocument::create(frame);
 #endif

 #if ENABLE(FTPDIR)
     // Plugins cannot take FTP from us either
     if (type == "application/x-ftp-directory")
         return FTPDirectoryDocument::create(frame);
 #endif

     PluginData* pluginData = 0;
     if (frame && frame->page() && frame->page()->settings()->arePluginsEnabled())
         pluginData = frame->page()->pluginData();

     // PDF is one image type for which a plugin can override built-in support.
     // We do not want QuickTime to take over all image types, obviously.
     if ((type == "application/pdf" || type == "text/pdf") && pluginData && pluginData->supportsMimeType(type))
         return PluginDocument::create(frame);
     if (Image::supportsType(type))
         return ImageDocument::create(frame);

 #if ENABLE(VIDEO)
      // Check to see if the type can be played by our MediaPlayer, if so create a MediaDocument
      if (MediaPlayer::supportsType(ContentType(type)))
          return MediaDocument::create(frame);
 #endif

     // Everything else except text/plain can be overridden by plugins. In particular, Adobe SVG Viewer should be used for SVG, if installed.
     // Disallowing plug-ins to use text/plain prevents plug-ins from hijacking a fundamental type that the browser is expected to handle,
     // and also serves as an optimization to prevent loading the plug-in database in the common case.
     if (type != "text/plain" && pluginData && pluginData->supportsMimeType(type))
         return PluginDocument::create(frame);
     if (isTextMIMEType(type))
         return TextDocument::create(frame);

 #if ENABLE(SVG)
     if (type == "image/svg+xml") {
 #if ENABLE(DASHBOARD_SUPPORT)
         Settings* settings = frame ? frame->settings() : 0;
         if (!settings || !settings->usesDashboardBackwardCompatibilityMode())
 #endif
             return SVGDocument::create(frame);
     }
 #endif
     if (isXMLMIMEType(type))
         return Document::create(frame);

     return HTMLDocument::create(frame);
 }

 }
	/*
	* Copyright (C) 1999 Lars Knoll (knoll@kde.org)
	* (C) 1999 Antti Koivisto (koivisto@kde.org)
	* (C) 2001 Dirk Mueller (mueller@kde.org)
	* Copyright (C) 2004, 2005, 2006, 2007, 2008 Apple Inc. All rights reserved.
	* Copyright (C) 2006 Samuel Weinig (sam@webkit.org)
	* 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 "DOMImplementation.h"

	#include "ContentType.h"
	#include "CSSStyleSheet.h"
	#include "DocumentType.h"
	#include "Element.h"
	#include "ExceptionCode.h"
	#include "Frame.h"
	#include "FTPDirectoryDocument.h"
	#include "HTMLDocument.h"
	#include "HTMLNames.h"
	#include "HTMLViewSourceDocument.h"
	#include "Image.h"
	#include "ImageDocument.h"
	#include "MediaDocument.h"
	#include "MediaList.h"
	#include "MediaPlayer.h"
	#include "MIMETypeRegistry.h"
	#include "Page.h"
	#include "PluginData.h"
	#include "PluginDocument.h"
	#include "RegularExpression.h"
	#include "Settings.h"
	#include "TextDocument.h"
	#include "XMLNames.h"
	#include <wtf/StdLibExtras.h>

	#if ENABLE(SVG)
	#include "SVGNames.h"
	#include "SVGDocument.h"
	#endif

	#if ENABLE(WML)
	#include "WMLNames.h"
	#include "WMLDocument.h"
	#endif

	namespace WebCore {

	#if ENABLE(SVG)

	typedef HashSet<String, CaseFoldingHash> FeatureSet;

	static void addString(FeatureSet& set, const char* string)
	{
	set.add(string);
	}

	static bool isSVG10Feature(const String &feature)
	{
	static bool initialized = false;
	DEFINE_STATIC_LOCAL(FeatureSet, svgFeatures, ());
	if (!initialized) {
	#if ENABLE(SVG_USE) && ENABLE(SVG_FOREIGN_OBJECT) && ENABLE(FILTERS) && ENABLE(SVG_FONTS)
	addString(svgFeatures, "svg");
	addString(svgFeatures, "svg.static");
	#endif
	// addString(svgFeatures, "svg.animation");
	// addString(svgFeatures, "svg.dynamic");
	// addString(svgFeatures, "svg.dom.animation");
	// addString(svgFeatures, "svg.dom.dynamic");
	#if ENABLE(SVG_USE) && ENABLE(SVG_FOREIGN_OBJECT) && ENABLE(FILTERS) && ENABLE(SVG_FONTS)
	addString(svgFeatures, "dom");
	addString(svgFeatures, "dom.svg");
	addString(svgFeatures, "dom.svg.static");
	#endif
	// addString(svgFeatures, "svg.all");
	// addString(svgFeatures, "dom.svg.all");
	initialized = true;
	}
	return svgFeatures.contains(feature);
	}

	static bool isSVG11Feature(const String &feature)
	{
	static bool initialized = false;
	DEFINE_STATIC_LOCAL(FeatureSet, svgFeatures, ());
	if (!initialized) {
	// Sadly, we cannot claim to implement any of the SVG 1.1 generic feature sets
	// lack of Font and Filter support.
	// http://bugs.webkit.org/show_bug.cgi?id=15480
	#if ENABLE(SVG_USE) && ENABLE(SVG_FOREIGN_OBJECT) && ENABLE(FILTERS) && ENABLE(SVG_FONTS)
	addString(svgFeatures, "SVG");
	addString(svgFeatures, "SVGDOM");
	addString(svgFeatures, "SVG-static");
	addString(svgFeatures, "SVGDOM-static");
	#endif
	#if ENABLE(SVG_ANIMATION)
	addString(svgFeatures, "SVG-animation");
	addString(svgFeatures, "SVGDOM-animation");
	#endif
	// addString(svgFeatures, "SVG-dynamic);
	// addString(svgFeatures, "SVGDOM-dynamic);
	addString(svgFeatures, "CoreAttribute");
	#if ENABLE(SVG_USE)
	addString(svgFeatures, "Structure");
	addString(svgFeatures, "BasicStructure");
	#endif
	addString(svgFeatures, "ContainerAttribute");
	addString(svgFeatures, "ConditionalProcessing");
	addString(svgFeatures, "Image");
	addString(svgFeatures, "Style");
	addString(svgFeatures, "ViewportAttribute");
	addString(svgFeatures, "Shape");
	// addString(svgFeatures, "Text"); // requires altGlyph, bug 6426
	addString(svgFeatures, "BasicText");
	addString(svgFeatures, "PaintAttribute");
	addString(svgFeatures, "BasicPaintAttribute");
	addString(svgFeatures, "OpacityAttribute");
	addString(svgFeatures, "GraphicsAttribute");
	addString(svgFeatures, "BaseGraphicsAttribute");
	addString(svgFeatures, "Marker");
	// addString(svgFeatures, "ColorProfile"); // requires color-profile, bug 6037
	addString(svgFeatures, "Gradient");
	addString(svgFeatures, "Pattern");
	addString(svgFeatures, "Clip");
	addString(svgFeatures, "BasicClip");
	addString(svgFeatures, "Mask");
	#if ENABLE(FILTERS)
	// addString(svgFeatures, "Filter");
	addString(svgFeatures, "BasicFilter");
	#endif
	addString(svgFeatures, "DocumentEventsAttribute");
	addString(svgFeatures, "GraphicalEventsAttribute");
	// addString(svgFeatures, "AnimationEventsAttribute");
	addString(svgFeatures, "Cursor");
	addString(svgFeatures, "Hyperlinking");
	addString(svgFeatures, "XlinkAttribute");
	addString(svgFeatures, "ExternalResourcesRequired");
	// addString(svgFeatures, "View"); // buggy <view> support, bug 16962
	addString(svgFeatures, "Script");
	#if ENABLE(SVG_ANIMATION)
	addString(svgFeatures, "Animation");
	#endif
	#if ENABLE(SVG_FONTS)
	addString(svgFeatures, "Font");
	addString(svgFeatures, "BasicFont");
	#endif
	#if ENABLE(SVG_FOREIGN_OBJECT)
	addString(svgFeatures, "Extensibility");
	#endif
	initialized = true;
	}
	return svgFeatures.contains(feature);
	}
	#endif

	bool DOMImplementation::hasFeature(const String& feature, const String& version)
	{
	String lower = feature.lower();
	if (lower == "core" \|\| lower == "html" \|\| lower == "xml" \|\| lower == "xhtml")
	return version.isEmpty() \|\| version == "1.0" \|\| version == "2.0";
	if (lower == "css"
	\|\| lower == "css2"
	\|\| lower == "events"
	\|\| lower == "htmlevents"
	\|\| lower == "mouseevents"
	\|\| lower == "mutationevents"
	\|\| lower == "range"
	\|\| lower == "stylesheets"
	\|\| lower == "traversal"
	\|\| lower == "uievents"
	\|\| lower == "views")
	return version.isEmpty() \|\| version == "2.0";
	if (lower == "xpath" \|\| lower == "textevents")
	return version.isEmpty() \|\| version == "3.0";

	#if ENABLE(SVG)
	if ((version.isEmpty() \|\| version == "1.1") && feature.startsWith("http://www.w3.org/tr/svg11/feature#", false)) {
	if (isSVG11Feature(feature.right(feature.length() - 35)))
	return true;
	}

	if ((version.isEmpty() \|\| version == "1.0") && feature.startsWith("org.w3c.", false)) {
	if (isSVG10Feature(feature.right(feature.length() - 8)))
	return true;
	}
	#endif

	return false;
	}

	PassRefPtr<DocumentType> DOMImplementation::createDocumentType(const String& qualifiedName,
	const String& publicId, const String& systemId, ExceptionCode& ec)
	{
	String prefix, localName;
	if (!Document::parseQualifiedName(qualifiedName, prefix, localName, ec))
	return 0;

	return DocumentType::create(0, qualifiedName, publicId, systemId);
	}

	DOMImplementation* DOMImplementation::getInterface(const String& /feature/)
	{
	return 0;
	}

	PassRefPtr<Document> DOMImplementation::createDocument(const String& namespaceURI,
	const String& qualifiedName, DocumentType* doctype, ExceptionCode& ec)
	{
	// WRONG_DOCUMENT_ERR: Raised if doctype has already been used with a different document or was
	// created from a different implementation.
	bool shouldThrowWrongDocErr = false;
	if (doctype && doctype->document())
	shouldThrowWrongDocErr = true;

	RefPtr<Document> doc;
	#if ENABLE(SVG)
	if (namespaceURI == SVGNames::svgNamespaceURI)
	doc = SVGDocument::create(0);
	else
	#endif
	#if ENABLE(WML)
	if (namespaceURI == WMLNames::wmlNamespaceURI)
	doc = WMLDocument::create(0);
	else
	#endif
	if (namespaceURI == HTMLNames::xhtmlNamespaceURI)
	doc = Document::createXHTML(0);
	else
	doc = Document::create(0);

	// now get the interesting parts of the doctype
	if (doctype)
	doc->addChild(doctype);

	if (!qualifiedName.isEmpty()) {
	RefPtr<Node> documentElement = doc->createElementNS(namespaceURI, qualifiedName, ec);
	if (ec)
	return 0;
	doc->addChild(documentElement.release());
	}

	// Hixie's interpretation of the DOM Core spec suggests we should prefer
	// other exceptions to WRONG_DOCUMENT_ERR (based on order mentioned in spec)
	if (shouldThrowWrongDocErr) {
	ec = WRONG_DOCUMENT_ERR;
	return 0;
	}

	return doc.release();
	}

	PassRefPtr<CSSStyleSheet> DOMImplementation::createCSSStyleSheet(const String&, const String& media, ExceptionCode&)
	{
	// FIXME: Title should be set.
	// FIXME: Media could have wrong syntax, in which case we should generate an exception.
	RefPtr<CSSStyleSheet> sheet = CSSStyleSheet::create();
	sheet->setMedia(MediaList::createAllowingDescriptionSyntax(sheet.get(), media));
	return sheet.release();
	}

	PassRefPtr<Document> DOMImplementation::createDocument(Frame* frame)
	{
	return Document::create(frame);
	}

	PassRefPtr<HTMLDocument> DOMImplementation::createHTMLDocument(Frame* frame)
	{
	return HTMLDocument::create(frame);
	}

	bool DOMImplementation::isXMLMIMEType(const String& mimeType)
	{
	if (mimeType == "text/xml" \|\| mimeType == "application/xml" \|\| mimeType == "text/xsl")
	return true;
	static const char* const validChars = "[0-9a-zA-Z_\\-+~!$\\^{}\|.%'`#&*]"; // per RFCs: 3023, 2045
	DEFINE_STATIC_LOCAL(RegularExpression, xmlTypeRegExp, (String("^") + validChars + "+/" + validChars + "+\\+xml$", TextCaseSensitive));
	return xmlTypeRegExp.match(mimeType) > -1;
	}

	bool DOMImplementation::isTextMIMEType(const String& mimeType)
	{
	if (MIMETypeRegistry::isSupportedJavaScriptMIMEType(mimeType) \|\|
	(mimeType.startsWith("text/") && mimeType != "text/html" &&
	mimeType != "text/xml" && mimeType != "text/xsl"))
	return true;

	return false;
	}

	PassRefPtr<HTMLDocument> DOMImplementation::createHTMLDocument(const String& title)
	{
	RefPtr<HTMLDocument> d = HTMLDocument::create(0);
	d->open();
	d->write("<!doctype html><html><head><title>" + title + "</title></head><body></body></html>");
	return d.release();
	}

	PassRefPtr<Document> DOMImplementation::createDocument(const String& type, Frame* frame, bool inViewSourceMode)
	{
	if (inViewSourceMode)
	return HTMLViewSourceDocument::create(frame, type);

	// Plugins cannot take HTML and XHTML from us, and we don't even need to initialize the plugin database for those.
	if (type == "text/html")
	return HTMLDocument::create(frame);
	if (type == "application/xhtml+xml"
	#if ENABLE(XHTMLMP)
	\|\| type == "application/vnd.wap.xhtml+xml"
	#endif
	)
	return Document::createXHTML(frame);

	#if ENABLE(WML)
	if (type == "text/vnd.wap.wml" \|\| type == "application/vnd.wap.wmlc")
	return WMLDocument::create(frame);
	#endif

	#if ENABLE(FTPDIR)
	// Plugins cannot take FTP from us either
	if (type == "application/x-ftp-directory")
	return FTPDirectoryDocument::create(frame);
	#endif

	PluginData* pluginData = 0;
	if (frame && frame->page() && frame->page()->settings()->arePluginsEnabled())
	pluginData = frame->page()->pluginData();

	// PDF is one image type for which a plugin can override built-in support.
	// We do not want QuickTime to take over all image types, obviously.
	if ((type == "application/pdf" \|\| type == "text/pdf") && pluginData && pluginData->supportsMimeType(type))
	return PluginDocument::create(frame);
	if (Image::supportsType(type))
	return ImageDocument::create(frame);

	#if ENABLE(VIDEO)
	// Check to see if the type can be played by our MediaPlayer, if so create a MediaDocument
	if (MediaPlayer::supportsType(ContentType(type)))
	return MediaDocument::create(frame);
	#endif

	// Everything else except text/plain can be overridden by plugins. In particular, Adobe SVG Viewer should be used for SVG, if installed.
	// Disallowing plug-ins to use text/plain prevents plug-ins from hijacking a fundamental type that the browser is expected to handle,
	// and also serves as an optimization to prevent loading the plug-in database in the common case.
	if (type != "text/plain" && pluginData && pluginData->supportsMimeType(type))
	return PluginDocument::create(frame);
	if (isTextMIMEType(type))
	return TextDocument::create(frame);

	#if ENABLE(SVG)
	if (type == "image/svg+xml") {
	#if ENABLE(DASHBOARD_SUPPORT)
	Settings* settings = frame ? frame->settings() : 0;
	if (!settings \|\| !settings->usesDashboardBackwardCompatibilityMode())
	#endif
	return SVGDocument::create(frame);
	}
	#endif
	if (isXMLMIMEType(type))
	return Document::create(frame);

	return HTMLDocument::create(frame);
	}

	}