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** This file contains pre-release code and may not be distributed.

** You may use this file in accordance with the terms and conditions

** contained in the Technology Preview License Agreement accompanying

** this package.

**

** GNU Lesser General Public License Usage

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** General Public License version 2.1 as published by the Free Software

** Foundation and appearing in the file LICENSE.LGPL included in the

** packaging of this file.  Please review the following information to

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****************************************************************************/

#include "qhelpenginecore.h"

#include "qhelp_global.h"

#include "fulltextsearch/qhits_p.h"

#include "fulltextsearch/qquery_p.h"

#include "fulltextsearch/qanalyzer_p.h"

#include "fulltextsearch/qdocument_p.h"

#include "fulltextsearch/qsearchable_p.h"

#include "fulltextsearch/qindexreader_p.h"

#include "fulltextsearch/qindexwriter_p.h"

#include "qhelpsearchindexwriter_clucene_p.h"

#include <QtCore/QDir>

#include <QtCore/QString>

#include <QtCore/QFileInfo>

#include <QtCore/QTextCodec>

#include <QtCore/QTextStream>

#include <QtNetwork/QLocalSocket>

#include <QtNetwork/QLocalServer>

#include "private/qfunctions_p.h"

QT_BEGIN_NAMESPACE

namespace qt {

    namespace fulltextsearch {

        namespace clucene {

// taken from qtexthtmlparser

static const struct QTextHtmlEntity

{

    const char *name;

    quint16 code;

} entities[] = {

    { "AElig", 0x00c6 },

    { "AMP", 38 },

    { "Aacute", 0x00c1 },

    { "Acirc", 0x00c2 },

    { "Agrave", 0x00c0 },

    { "Alpha", 0x0391 },

    { "Aring", 0x00c5 },

    { "Atilde", 0x00c3 },

    { "Auml", 0x00c4 },

    { "Beta", 0x0392 },

    { "Ccedil", 0x00c7 },

    { "Chi", 0x03a7 },

    { "Dagger", 0x2021 },

    { "Delta", 0x0394 },

    { "ETH", 0x00d0 },

    { "Eacute", 0x00c9 },

    { "Ecirc", 0x00ca },

    { "Egrave", 0x00c8 },

    { "Epsilon", 0x0395 },

    { "Eta", 0x0397 },

    { "Euml", 0x00cb },

    { "GT", 62 },

    { "Gamma", 0x0393 },

    { "Iacute", 0x00cd },

    { "Icirc", 0x00ce },

    { "Igrave", 0x00cc },

    { "Iota", 0x0399 },

    { "Iuml", 0x00cf },

    { "Kappa", 0x039a },

    { "LT", 60 },

    { "Lambda", 0x039b },

    { "Mu", 0x039c },

    { "Ntilde", 0x00d1 },

    { "Nu", 0x039d },

    { "OElig", 0x0152 },

    { "Oacute", 0x00d3 },

    { "Ocirc", 0x00d4 },

    { "Ograve", 0x00d2 },

    { "Omega", 0x03a9 },

    { "Omicron", 0x039f },

    { "Oslash", 0x00d8 },

    { "Otilde", 0x00d5 },

    { "Ouml", 0x00d6 },

    { "Phi", 0x03a6 },

    { "Pi", 0x03a0 },

    { "Prime", 0x2033 },

    { "Psi", 0x03a8 },

    { "QUOT", 34 },

    { "Rho", 0x03a1 },

    { "Scaron", 0x0160 },

    { "Sigma", 0x03a3 },

    { "THORN", 0x00de },

    { "Tau", 0x03a4 },

    { "Theta", 0x0398 },

    { "Uacute", 0x00da },

    { "Ucirc", 0x00db },

    { "Ugrave", 0x00d9 },

    { "Upsilon", 0x03a5 },

    { "Uuml", 0x00dc },

    { "Xi", 0x039e },

    { "Yacute", 0x00dd },

    { "Yuml", 0x0178 },

    { "Zeta", 0x0396 },

    { "aacute", 0x00e1 },

    { "acirc", 0x00e2 },

    { "acute", 0x00b4 },

    { "aelig", 0x00e6 },

    { "agrave", 0x00e0 },

    { "alefsym", 0x2135 },

    { "alpha", 0x03b1 },

    { "amp", 38 },

    { "and", 0x22a5 },

    { "ang", 0x2220 },

    { "apos", 0x0027 },

    { "aring", 0x00e5 },

    { "asymp", 0x2248 },

    { "atilde", 0x00e3 },

    { "auml", 0x00e4 },

    { "bdquo", 0x201e },

    { "beta", 0x03b2 },

    { "brvbar", 0x00a6 },

    { "bull", 0x2022 },

    { "cap", 0x2229 },

    { "ccedil", 0x00e7 },

    { "cedil", 0x00b8 },

    { "cent", 0x00a2 },

    { "chi", 0x03c7 },

    { "circ", 0x02c6 },

    { "clubs", 0x2663 },

    { "cong", 0x2245 },

    { "copy", 0x00a9 },

    { "crarr", 0x21b5 },

    { "cup", 0x222a },

    { "curren", 0x00a4 },

    { "dArr", 0x21d3 },

    { "dagger", 0x2020 },

    { "darr", 0x2193 },

    { "deg", 0x00b0 },

    { "delta", 0x03b4 },

    { "diams", 0x2666 },

    { "divide", 0x00f7 },

    { "eacute", 0x00e9 },

    { "ecirc", 0x00ea },

    { "egrave", 0x00e8 },

    { "empty", 0x2205 },

    { "emsp", 0x2003 },

    { "ensp", 0x2002 },

    { "epsilon", 0x03b5 },

    { "equiv", 0x2261 },

    { "eta", 0x03b7 },

    { "eth", 0x00f0 },

    { "euml", 0x00eb },

    { "euro", 0x20ac },

    { "exist", 0x2203 },

    { "fnof", 0x0192 },

    { "forall", 0x2200 },

    { "frac12", 0x00bd },

    { "frac14", 0x00bc },

    { "frac34", 0x00be },

    { "frasl", 0x2044 },

    { "gamma", 0x03b3 },

    { "ge", 0x2265 },

    { "gt", 62 },

    { "hArr", 0x21d4 },

    { "harr", 0x2194 },

    { "hearts", 0x2665 },

    { "hellip", 0x2026 },

    { "iacute", 0x00ed },

    { "icirc", 0x00ee },

    { "iexcl", 0x00a1 },

    { "igrave", 0x00ec },

    { "image", 0x2111 },

    { "infin", 0x221e },

    { "int", 0x222b },

    { "iota", 0x03b9 },

    { "iquest", 0x00bf },

    { "isin", 0x2208 },

    { "iuml", 0x00ef },

    { "kappa", 0x03ba },

    { "lArr", 0x21d0 },

    { "lambda", 0x03bb },

    { "lang", 0x2329 },

    { "laquo", 0x00ab },

    { "larr", 0x2190 },

    { "lceil", 0x2308 },

    { "ldquo", 0x201c },

    { "le", 0x2264 },

    { "lfloor", 0x230a },

    { "lowast", 0x2217 },

    { "loz", 0x25ca },

    { "lrm", 0x200e },

    { "lsaquo", 0x2039 },

    { "lsquo", 0x2018 },

    { "lt", 60 },

    { "macr", 0x00af },

    { "mdash", 0x2014 },

    { "micro", 0x00b5 },

    { "middot", 0x00b7 },

    { "minus", 0x2212 },

    { "mu", 0x03bc },

    { "nabla", 0x2207 },

    { "nbsp", 0x00a0 },

    { "ndash", 0x2013 },

    { "ne", 0x2260 },

    { "ni", 0x220b },

    { "not", 0x00ac },

    { "notin", 0x2209 },

    { "nsub", 0x2284 },

    { "ntilde", 0x00f1 },

    { "nu", 0x03bd },

    { "oacute", 0x00f3 },

    { "ocirc", 0x00f4 },

    { "oelig", 0x0153 },

    { "ograve", 0x00f2 },

    { "oline", 0x203e },

    { "omega", 0x03c9 },

    { "omicron", 0x03bf },

    { "oplus", 0x2295 },

    { "or", 0x22a6 },

    { "ordf", 0x00aa },

    { "ordm", 0x00ba },

    { "oslash", 0x00f8 },

    { "otilde", 0x00f5 },

    { "otimes", 0x2297 },

    { "ouml", 0x00f6 },

    { "para", 0x00b6 },

    { "part", 0x2202 },

    { "percnt", 0x0025 },

    { "permil", 0x2030 },

    { "perp", 0x22a5 },

    { "phi", 0x03c6 },

    { "pi", 0x03c0 },

    { "piv", 0x03d6 },

    { "plusmn", 0x00b1 },

    { "pound", 0x00a3 },

    { "prime", 0x2032 },

    { "prod", 0x220f },

    { "prop", 0x221d },

    { "psi", 0x03c8 },

    { "quot", 34 },

    { "rArr", 0x21d2 },

    { "radic", 0x221a },

    { "rang", 0x232a },

    { "raquo", 0x00bb },

    { "rarr", 0x2192 },

    { "rceil", 0x2309 },

    { "rdquo", 0x201d },

    { "real", 0x211c },

    { "reg", 0x00ae },

    { "rfloor", 0x230b },

    { "rho", 0x03c1 },

    { "rlm", 0x200f },

    { "rsaquo", 0x203a },

    { "rsquo", 0x2019 },

    { "sbquo", 0x201a },

    { "scaron", 0x0161 },

    { "sdot", 0x22c5 },

    { "sect", 0x00a7 },

    { "shy", 0x00ad },

    { "sigma", 0x03c3 },

    { "sigmaf", 0x03c2 },

    { "sim", 0x223c },

    { "spades", 0x2660 },

    { "sub", 0x2282 },

    { "sube", 0x2286 },

    { "sum", 0x2211 },

    { "sup", 0x2283 },

    { "sup1", 0x00b9 },

    { "sup2", 0x00b2 },

    { "sup3", 0x00b3 },

    { "supe", 0x2287 },

    { "szlig", 0x00df },

    { "tau", 0x03c4 },

    { "there4", 0x2234 },

    { "theta", 0x03b8 },

    { "thetasym", 0x03d1 },

    { "thinsp", 0x2009 },

    { "thorn", 0x00fe },

    { "tilde", 0x02dc },

    { "times", 0x00d7 },

    { "trade", 0x2122 },

    { "uArr", 0x21d1 },

    { "uacute", 0x00fa },

    { "uarr", 0x2191 },

    { "ucirc", 0x00fb },

    { "ugrave", 0x00f9 },

    { "uml", 0x00a8 },

    { "upsih", 0x03d2 },

    { "upsilon", 0x03c5 },

    { "uuml", 0x00fc },

    { "weierp", 0x2118 },

    { "xi", 0x03be },

    { "yacute", 0x00fd },

    { "yen", 0x00a5 },

    { "yuml", 0x00ff },

    { "zeta", 0x03b6 },

    { "zwj", 0x200d },

    { "zwnj", 0x200c }

};

Q_STATIC_GLOBAL_OPERATOR bool operator<(const QString &entityStr, const QTextHtmlEntity &entity)

{

    return entityStr < QLatin1String(entity.name);

}

Q_STATIC_GLOBAL_OPERATOR bool operator<(const QTextHtmlEntity &entity, const QString &entityStr)

{

    return QLatin1String(entity.name) < entityStr;

}

static QChar resolveEntity(const QString &entity)

{

    const QTextHtmlEntity *start = &entities[0];

    const QTextHtmlEntity *end = &entities[(sizeof(entities) / sizeof(entities[0]))];

    const QTextHtmlEntity *e = qBinaryFind(start, end, entity);

    if (e == end)

        return QChar();

    return e->code;

}

static const uint latin1Extended[0xA0 - 0x80] = {

    0x20ac, // 0x80

    0x0081, // 0x81 direct mapping

    0x201a, // 0x82

    0x0192, // 0x83

    0x201e, // 0x84

    0x2026, // 0x85

    0x2020, // 0x86

    0x2021, // 0x87

    0x02C6, // 0x88

    0x2030, // 0x89

    0x0160, // 0x8A

    0x2039, // 0x8B

    0x0152, // 0x8C

    0x008D, // 0x8D direct mapping

    0x017D, // 0x8E

    0x008F, // 0x8F directmapping

    0x0090, // 0x90 directmapping

    0x2018, // 0x91

    0x2019, // 0x92

    0x201C, // 0x93

    0X201D, // 0x94

    0x2022, // 0x95

    0x2013, // 0x96

    0x2014, // 0x97

    0x02DC, // 0x98

    0x2122, // 0x99

    0x0161, // 0x9A

    0x203A, // 0x9B

    0x0153, // 0x9C

    0x009D, // 0x9D direct mapping

    0x017E, // 0x9E

    0x0178  // 0x9F

};

// end taken from qtexthtmlparser

class DocumentHelper

{

public:

    DocumentHelper(const QString &fileName, const QByteArray &data)

        : fileName(fileName) , data(readData(data)) {}

    ~DocumentHelper() {}

    bool addFieldsToDocument(QCLuceneDocument *document,

        const QString &namespaceName, const QString &attributes = QString())

    {

        if (!document)

            return false;

        if(!data.isEmpty()) {

            QString parsedData = parseData();

            QString parsedTitle = QHelpGlobal::documentTitle(data);

            if(!parsedData.isEmpty()) {

                document->add(new QCLuceneField(QLatin1String("content"),

                    parsedData,QCLuceneField::INDEX_TOKENIZED));

                document->add(new QCLuceneField(QLatin1String("path"), fileName,

                    QCLuceneField::STORE_YES | QCLuceneField::INDEX_UNTOKENIZED));

                document->add(new QCLuceneField(QLatin1String("title"), parsedTitle,

                    QCLuceneField::STORE_YES | QCLuceneField::INDEX_UNTOKENIZED));

                document->add(new QCLuceneField(QLatin1String("titleTokenized"), parsedTitle,

                    QCLuceneField::STORE_YES | QCLuceneField::INDEX_TOKENIZED));

                document->add(new QCLuceneField(QLatin1String("namespace"), namespaceName,

                    QCLuceneField::STORE_YES | QCLuceneField::INDEX_UNTOKENIZED));

                document->add(new QCLuceneField(QLatin1String("attribute"), attributes,

                    QCLuceneField::STORE_YES | QCLuceneField::INDEX_TOKENIZED));

                return true;

            }

        }

        return false;

    }

private:

    QString readData(const QByteArray &data)

    {

        QTextStream textStream(data);

        QByteArray charSet = QHelpGlobal::charsetFromData(data).toLatin1();

        textStream.setCodec(QTextCodec::codecForName(charSet.constData()));

        QString stream = textStream.readAll();

        if (stream.isNull() || stream.isEmpty())

            return QString();

        return stream;

    }

    QString parseData() const

    {

        const int length = data.length();

        const QChar *buf = data.unicode();

        QString parsedContent;

        parsedContent.reserve(length);

        bool valid = true;

        int j = 0, count = 0;

        QChar c;

        while (j < length) {

            c = buf[j++];

            if (c == QLatin1Char('<') || c == QLatin1Char('&')) {

                if (count > 1 && c != QLatin1Char('&'))

                    parsedContent.append(QLatin1Char(' '));

                else if (c == QLatin1Char('&')) {

                    // Note: this will modify the counter j, in case we sucessful parsed the entity

                    //       we will have modified the counter to stay 1 before the closing ';', so

                    //       the following if condition will be met with if (c == QLatin1Char(';'))

                    parsedContent.append(parseEntity(length, buf, j));

                }

                count = 0;

                valid = false;

                continue;

            }

            if ((c == QLatin1Char('>') || c == QLatin1Char(';')) && !valid) {

                valid = true;

                continue;

            }

            if (!valid)

                continue;

            if (c.isLetterOrNumber() || c.isPrint()) {

                ++count;

                parsedContent.append(c.toLower());

            } else {

                if (count > 1)

                    parsedContent.append(QLatin1Char(' '));

                count = 0;

            }

        }

        return parsedContent;

    }

    // taken from qtexthtmlparser

    // parses an entity after "&", and returns it

    QString parseEntity(int len, const QChar *buf, int &pos) const

    {

        int recover = pos;

        QString entity;

        while (pos < len) {

            QChar c = buf[pos++];

            if (c.isSpace() || pos - recover > 9) {

                goto error;

            }

            if (c == QLatin1Char(';')) {

                pos--;

                break;

            }

            entity += c;

        }

        {

            QChar resolved = resolveEntity(entity);

            if (!resolved.isNull())

                return QString(resolved);

        }

        if (entity.length() > 1 && entity.at(0) == QLatin1Char('#')) {

            entity.remove(0, 1); // removing leading #

            int base = 10;

            bool ok = false;

            if (entity.at(0).toLower() == QLatin1Char('x')) { // hex entity?

                entity.remove(0, 1);

                base = 16;

            }

            uint uc = entity.toUInt(&ok, base);

            if (ok) {

                if (uc >= 0x80  && uc < 0x80 + (sizeof(latin1Extended) / sizeof(latin1Extended[0])))

                    uc = latin1Extended[uc - 0x80]; // windows latin 1 extended

                QString str;