/*

 * 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 "FrameLoaderClient.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)

{

    RefPtr<Document> doc;

#if ENABLE(SVG)

    if (namespaceURI == SVGNames::svgNamespaceURI)

        doc = SVGDocument::create(0, KURL());

    else

#endif

#if ENABLE(WML)

    if (namespaceURI == WMLNames::wmlNamespaceURI)

        doc = WMLDocument::create(0, KURL());

    else

#endif

    if (namespaceURI == HTMLNames::xhtmlNamespaceURI)

        doc = Document::createXHTML(0, KURL());

    else

        doc = Document::create(0, KURL());

    RefPtr<Node> documentElement;

    if (!qualifiedName.isEmpty()) {

        documentElement = doc->createElementNS(namespaceURI, qualifiedName, ec);

        if (ec)

            return 0;

    }

    // WRONG_DOCUMENT_ERR: Raised if doctype has already been used with a different document or was

    // created from a different implementation.

    // 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 (doctype && doctype->document()) {

        ec = WRONG_DOCUMENT_ERR;

        return 0;

    }

    // FIXME: Shouldn't this call appendChild instead?

    if (doctype)

        doc->legacyParserAddChild(doctype);

    if (documentElement)

        doc->legacyParserAddChild(documentElement.release());

    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();

}

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 == "application/json" // Render JSON as text/plain.

        || (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, KURL());

    d->open();

    d->write("<!doctype html><html><body></body></html>");

    d->setTitle(title);

    return d.release();

}

PassRefPtr<Document> DOMImplementation::createDocument(const String& type, Frame* frame, const KURL& url, bool inViewSourceMode)

{

    if (inViewSourceMode)

        return HTMLViewSourceDocument::create(frame, url, 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, url);

    if (type == "application/xhtml+xml"

#if ENABLE(XHTMLMP)

        || type == "application/vnd.wap.xhtml+xml"

#endif

        )

        return Document::createXHTML(frame, url);

#if ENABLE(WML)

    if (type == "text/vnd.wap.wml" || type == "application/vnd.wap.wmlc")

        return WMLDocument::create(frame, url);

#endif

#if ENABLE(FTPDIR)

    // Plugins cannot take FTP from us either

    if (type == "application/x-ftp-directory")

        return FTPDirectoryDocument::create(frame, url);

#endif

    PluginData* pluginData = 0;

    if (frame && frame->page() && frame->loader()->subframeLoader()->allowPlugins(NotAboutToInstantiatePlugin))

        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, url);

    if (Image::supportsType(type))

        return ImageDocument::create(frame, url);

#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, url);

#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, url);

    if (isTextMIMEType(type))

        return TextDocument::create(frame, url);

#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, url);

    }

#endif

    if (isXMLMIMEType(type))

        return Document::create(frame, url);

    return HTMLDocument::create(frame, url);

}

}