/*

 * Copyright (C) 2006, 2008, 2009 Apple Inc.  All rights reserved.

 * Copyright (C) 2008, 2009 Torch Mobile Inc. All rights reserved. (http://www.torchmobile.com/)

 *

 * Redistribution and use in source and binary forms, with or without

 * modification, are permitted provided that the following conditions

 * are met:

 * 1. Redistributions of source code must retain the above copyright

 *    notice, this list of conditions and the following disclaimer.

 * 2. Redistributions in binary form must reproduce the above copyright

 *    notice, this list of conditions and the following disclaimer in the

 *    documentation and/or other materials provided with the distribution.

 *

 * THIS SOFTWARE IS PROVIDED BY APPLE COMPUTER, INC. ``AS IS'' AND ANY

 * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE

 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR

 * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL APPLE COMPUTER, INC. OR

 * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,

 * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,

 * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR

 * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY

 * OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT

 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE

 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.

 */

#include "config.h"

#include "MIMETypeRegistry.h"

#include "ArchiveFactory.h"

#include "MediaPlayer.h"

#include "StringHash.h"

#include <wtf/HashMap.h>

#include <wtf/HashSet.h>

#include <wtf/StdLibExtras.h>

#if PLATFORM(CG)

#include "ImageSourceCG.h"

#include <ApplicationServices/ApplicationServices.h>

#include <wtf/RetainPtr.h>

#endif

#if PLATFORM(QT)

#include <qimagereader.h>

#include <qimagewriter.h>

#endif

namespace WebCore {

static HashSet<String>* supportedImageResourceMIMETypes;

static HashSet<String>* supportedImageMIMETypes;

static HashSet<String>* supportedImageMIMETypesForEncoding;

static HashSet<String>* supportedJavaScriptMIMETypes;

static HashSet<String>* supportedNonImageMIMETypes;

static HashSet<String>* supportedMediaMIMETypes;

static HashMap<String, String, CaseFoldingHash>* mediaMIMETypeForExtensionMap;

static void initializeSupportedImageMIMETypes()

{

#if PLATFORM(CG)

    RetainPtr<CFArrayRef> supportedTypes(AdoptCF, CGImageSourceCopyTypeIdentifiers());

    CFIndex count = CFArrayGetCount(supportedTypes.get());

    for (CFIndex i = 0; i < count; i++) {

        RetainPtr<CFStringRef> supportedType(AdoptCF, reinterpret_cast<CFStringRef>(CFArrayGetValueAtIndex(supportedTypes.get(), i)));

        String mimeType = MIMETypeForImageSourceType(supportedType.get());

        if (!mimeType.isEmpty()) {

            supportedImageMIMETypes->add(mimeType);

            supportedImageResourceMIMETypes->add(mimeType);

        }

    }

    // On Tiger and Leopard, com.microsoft.bmp doesn't have a MIME type in the registry.

    supportedImageMIMETypes->add("image/bmp");

    supportedImageResourceMIMETypes->add("image/bmp");

    // Favicons don't have a MIME type in the registry either.

    supportedImageMIMETypes->add("image/vnd.microsoft.icon");

    supportedImageMIMETypes->add("image/x-icon");

    supportedImageResourceMIMETypes->add("image/vnd.microsoft.icon");

    supportedImageResourceMIMETypes->add("image/x-icon");

    //  We only get one MIME type per UTI, hence our need to add these manually

    supportedImageMIMETypes->add("image/pjpeg");

    supportedImageResourceMIMETypes->add("image/pjpeg");

    //  We don't want to try to treat all binary data as an image

    supportedImageMIMETypes->remove("application/octet-stream");

    supportedImageResourceMIMETypes->remove("application/octet-stream");

    //  Don't treat pdf/postscript as images directly

    supportedImageMIMETypes->remove("application/pdf");

    supportedImageMIMETypes->remove("application/postscript");

#elif PLATFORM(QT)

    QList<QByteArray> formats = QImageReader::supportedImageFormats();

    for (size_t i = 0; i < static_cast<size_t>(formats.size()); ++i) {

#if ENABLE(SVG)

        /*

         * Qt has support for SVG, but we want to use KSVG2

         */

        if (formats.at(i).toLower().startsWith("svg"))

            continue;

#endif

        String mimeType = MIMETypeRegistry::getMIMETypeForExtension(formats.at(i).constData());

        supportedImageMIMETypes->add(mimeType);

        supportedImageResourceMIMETypes->add(mimeType);

    }

    supportedImageMIMETypes->remove("application/octet-stream");

    supportedImageResourceMIMETypes->remove("application/octet-stream");

#else

    // assume that all implementations at least support the following standard

    // image types:

    static const char* types[] = {

        "image/jpeg",

        "image/png",

        "image/gif",

        "image/bmp",

        "image/vnd.microsoft.icon",    // ico

        "image/x-icon",    // ico

        "image/x-xbitmap"  // xbm

    };

    for (size_t i = 0; i < sizeof(types) / sizeof(types[0]); ++i) {

        supportedImageMIMETypes->add(types[i]);

        supportedImageResourceMIMETypes->add(types[i]);

    }

#endif

}

static void initializeSupportedImageMIMETypesForEncoding()

{

    supportedImageMIMETypesForEncoding = new HashSet<String>;

#if PLATFORM(CG)

#if PLATFORM(MAC)

    RetainPtr<CFArrayRef> supportedTypes(AdoptCF, CGImageDestinationCopyTypeIdentifiers());

    CFIndex count = CFArrayGetCount(supportedTypes.get());

    for (CFIndex i = 0; i < count; i++) {

        RetainPtr<CFStringRef> supportedType(AdoptCF, reinterpret_cast<CFStringRef>(CFArrayGetValueAtIndex(supportedTypes.get(), i)));

        String mimeType = MIMETypeForImageSourceType(supportedType.get());

        if (!mimeType.isEmpty())

            supportedImageMIMETypesForEncoding->add(mimeType);

    }

#else

    // FIXME: Add Windows support for all the supported UTI's when a way to convert from MIMEType to UTI reliably is found.

    // For now, only support PNG, JPEG and GIF.  See <rdar://problem/6095286>.

    supportedImageMIMETypesForEncoding->add("image/png");

    supportedImageMIMETypesForEncoding->add("image/jpeg");

    supportedImageMIMETypesForEncoding->add("image/gif");

#endif

#elif PLATFORM(QT)

    QList<QByteArray> formats = QImageWriter::supportedImageFormats();

    for (int i = 0; i < formats.size(); ++i) {

        String mimeType = MIMETypeRegistry::getMIMETypeForExtension(formats.at(i).constData());

        supportedImageMIMETypesForEncoding->add(mimeType);

    }

    supportedImageMIMETypesForEncoding->remove("application/octet-stream");

#elif PLATFORM(CAIRO)

    supportedImageMIMETypesForEncoding->add("image/png");

#endif

}

static void initializeSupportedJavaScriptMIMETypes()

{

    /*

        Mozilla 1.8 and WinIE 7 both accept text/javascript and text/ecmascript.

        Mozilla 1.8 accepts application/javascript, application/ecmascript, and application/x-javascript, but WinIE 7 doesn't.

        WinIE 7 accepts text/javascript1.1 - text/javascript1.3, text/jscript, and text/livescript, but Mozilla 1.8 doesn't.

        Mozilla 1.8 allows leading and trailing whitespace, but WinIE 7 doesn't.

        Mozilla 1.8 and WinIE 7 both accept the empty string, but neither accept a whitespace-only string.

        We want to accept all the values that either of these browsers accept, but not other values.

     */

    static const char* types[] = {

        "text/javascript",

        "text/ecmascript",

        "application/javascript",

        "application/ecmascript",

        "application/x-javascript",

        "text/javascript1.1",

        "text/javascript1.2",

        "text/javascript1.3",

        "text/jscript",

        "text/livescript",

    };

    for (size_t i = 0; i < sizeof(types) / sizeof(types[0]); ++i)

      supportedJavaScriptMIMETypes->add(types[i]);

}

static void initializeSupportedNonImageMimeTypes()

{

    static const char* types[] = {

#if ENABLE(WML)

        "text/vnd.wap.wml",

        "application/vnd.wap.wmlc",

#endif

        "text/html",

        "text/xml",

        "text/xsl",

        "text/plain",

        "text/",

        "application/xml",

        "application/xhtml+xml",

        "application/vnd.wap.xhtml+xml",

        "application/rss+xml",

        "application/atom+xml",

#if ENABLE(SVG)

        "image/svg+xml",

#endif

#if ENABLE(FTPDIR)

        "application/x-ftp-directory",

#endif

        "multipart/x-mixed-replace"

    };

    for (size_t i = 0; i < sizeof(types)/sizeof(types[0]); ++i)

        supportedNonImageMIMETypes->add(types[i]);

    ArchiveFactory::registerKnownArchiveMIMETypes();

}

static void initializeMediaTypeMaps()

{

    struct TypeExtensionPair {

        const char* type;

        const char* extension;

    };

    // A table of common media MIME types and file extenstions used when a platform's

    // specific MIME type lookup doens't have a match for a media file extension. While some

    // file extensions are claimed by multiple MIME types, this table only includes one 

    // for each because it is currently only used by getMediaMIMETypeForExtension. If we

    // ever add a MIME type -> file extension mapping, the alternate MIME types will need

    // to be added.

    static const TypeExtensionPair pairs[] = {

        // Ogg

        { "application/ogg", "ogg" },

        { "application/ogg", "ogx" },

        { "audio/ogg", "oga" },

        { "video/ogg", "ogv" },

        // Annodex

        { "application/annodex", "anx" },

        { "audio/annodex", "axa" },

        { "video/annodex", "axv" },

        { "audio/speex", "spx" },

        // MPEG

        { "audio/mpeg", "m1a" },

        { "audio/mpeg", "m2a" },

        { "audio/mpeg", "m1s" },

        { "audio/mpeg", "mpa" },

        { "video/mpeg", "mpg" },

        { "video/mpeg", "m15" },

        { "video/mpeg", "m1s" },

        { "video/mpeg", "m1v" },

        { "video/mpeg", "m75" },

        { "video/mpeg", "mpa" },

        { "video/mpeg", "mpeg" },

        { "video/mpeg", "mpm" },

        { "video/mpeg", "mpv" },

        // MPEG playlist

        { "audio/x-mpegurl", "m3url" },

        { "application/x-mpegurl", "m3u8" },

        // MPEG-4

        { "video/x-m4v", "m4v" },

        { "audio/x-m4a", "m4a" },

        { "audio/x-m4b", "m4b" },

        { "audio/x-m4p", "m4p" },

        // MP3

        { "audio/mp3", "mp3" },

        // MPEG-2

        { "video/x-mpeg2", "mp2" },

        { "video/mpeg2", "vob" },

        { "video/mpeg2", "mod" },

        { "video/m2ts", "m2ts" },

        { "video/x-m2ts", "m2t" },

        { "video/x-m2ts", "ts" },

        // 3GP/3GP2

        { "audio/3gpp", "3gpp" }, 

        { "audio/3gpp2", "3g2" }, 

        { "application/x-mpeg", "amc" },

        // AAC

        { "audio/aac", "aac" },

        { "audio/aac", "adts" },

        { "audio/x-aac", "m4r" },

        // CoreAudio File

        { "audio/x-caf", "caf" },

        { "audio/x-gsm", "gsm" }

    };

    mediaMIMETypeForExtensionMap = new HashMap<String, String, CaseFoldingHash>;

    const unsigned numPairs = sizeof(pairs) / sizeof(pairs[0]);

    for (unsigned ndx = 0; ndx < numPairs; ++ndx)

        mediaMIMETypeForExtensionMap->set(pairs[ndx].extension, pairs[ndx].type);

}

String MIMETypeRegistry::getMediaMIMETypeForExtension(const String& ext)

{

    // Check with system specific implementation first.

    String mimeType = getMIMETypeForExtension(ext);

    if (!mimeType.isEmpty())

        return mimeType;

    // No match, look in the static mapping.

    if (!mediaMIMETypeForExtensionMap)

        initializeMediaTypeMaps();

    return mediaMIMETypeForExtensionMap->get(ext);

}

static void initializeSupportedMediaMIMETypes()

{

    supportedMediaMIMETypes = new HashSet<String>;

#if ENABLE(VIDEO)

    MediaPlayer::getSupportedTypes(*supportedMediaMIMETypes);

#endif

}

static void initializeMIMETypeRegistry()

{

    supportedJavaScriptMIMETypes = new HashSet<String>;

    initializeSupportedJavaScriptMIMETypes();

    supportedNonImageMIMETypes = new HashSet<String>(*supportedJavaScriptMIMETypes);

    initializeSupportedNonImageMimeTypes();

    supportedImageResourceMIMETypes = new HashSet<String>;

    supportedImageMIMETypes = new HashSet<String>;

    initializeSupportedImageMIMETypes();

}

String MIMETypeRegistry::getMIMETypeForPath(const String& path)

{

    int pos = path.reverseFind('.');

    if (pos >= 0) {

        String extension = path.substring(pos + 1);

        String result = getMIMETypeForExtension(extension);

        if (result.length())

            return result;

    }

    return "application/octet-stream";

}

bool MIMETypeRegistry::isSupportedImageMIMEType(const String& mimeType)

{

    if (mimeType.isEmpty())

        return false;

    if (!supportedImageMIMETypes)

        initializeMIMETypeRegistry();

    return supportedImageMIMETypes->contains(mimeType);

}

bool MIMETypeRegistry::isSupportedImageResourceMIMEType(const String& mimeType)

{

    if (mimeType.isEmpty())

        return false;

    if (!supportedImageResourceMIMETypes)

        initializeMIMETypeRegistry();

    return supportedImageResourceMIMETypes->contains(mimeType);

}

bool MIMETypeRegistry::isSupportedImageMIMETypeForEncoding(const String& mimeType)

{

    if (mimeType.isEmpty())

        return false;

    if (!supportedImageMIMETypesForEncoding)

        initializeSupportedImageMIMETypesForEncoding();

    return supportedImageMIMETypesForEncoding->contains(mimeType);

}

bool MIMETypeRegistry::isSupportedJavaScriptMIMEType(const String& mimeType)

{

    if (mimeType.isEmpty())

        return false;

    if (!supportedJavaScriptMIMETypes)

        initializeMIMETypeRegistry();

    return supportedJavaScriptMIMETypes->contains(mimeType);

}

bool MIMETypeRegistry::isSupportedNonImageMIMEType(const String& mimeType)

{

    if (mimeType.isEmpty())

        return false;

    if (!supportedNonImageMIMETypes)

        initializeMIMETypeRegistry();

    return supportedNonImageMIMETypes->contains(mimeType);

}

bool MIMETypeRegistry::isSupportedMediaMIMEType(const String& mimeType)

{

    if (mimeType.isEmpty())

        return false;

    if (!supportedMediaMIMETypes)

        initializeSupportedMediaMIMETypes();

    return supportedMediaMIMETypes->contains(mimeType);

}

bool MIMETypeRegistry::isJavaAppletMIMEType(const String& mimeType)

{

    // Since this set is very limited and is likely to remain so we won't bother with the overhead

    // of using a hash set.

    // Any of the MIME types below may be followed by any number of specific versions of the JVM,

    // which is why we use startsWith()

    return mimeType.startsWith("application/x-java-applet", false)

        || mimeType.startsWith("application/x-java-bean", false)

        || mimeType.startsWith("application/x-java-vm", false);

}

HashSet<String>& MIMETypeRegistry::getSupportedImageMIMETypes()

{

    if (!supportedImageMIMETypes)

        initializeMIMETypeRegistry();

    return *supportedImageMIMETypes;

}

HashSet<String>& MIMETypeRegistry::getSupportedImageResourceMIMETypes()

{

    if (!supportedImageResourceMIMETypes)

        initializeMIMETypeRegistry();

    return *supportedImageResourceMIMETypes;

}

HashSet<String>& MIMETypeRegistry::getSupportedImageMIMETypesForEncoding()

{

    if (!supportedImageMIMETypesForEncoding)

        initializeSupportedImageMIMETypesForEncoding();

    return *supportedImageMIMETypesForEncoding;

}

HashSet<String>& MIMETypeRegistry::getSupportedNonImageMIMETypes()

{

    if (!supportedNonImageMIMETypes)

        initializeMIMETypeRegistry();

    return *supportedNonImageMIMETypes;

}

HashSet<String>& MIMETypeRegistry::getSupportedMediaMIMETypes()

{

    if (!supportedMediaMIMETypes)

        initializeSupportedMediaMIMETypes();

    return *supportedMediaMIMETypes;

}

const String& defaultMIMEType()

{

    DEFINE_STATIC_LOCAL(const String, defaultMIMEType, ("application/octet-stream"));

    return defaultMIMEType;

}

} // namespace WebCore