Long live Qt 4.5!

1 files changed, 581 insertions, 0 deletions

diff --git a/tools/assistant/compat/index.cpp b/tools/assistant/compat/index.cpp
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+/****************************************************************************
+**
+** Copyright (C) 2009 Nokia Corporation and/or its subsidiary(-ies).
+** Contact: Qt Software Information (qt-info@nokia.com)
+**
+** This file is part of the Qt Assistant of the Qt Toolkit.
+**
+** $QT_BEGIN_LICENSE:LGPL$
+** No Commercial Usage
+** 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 either Technology Preview License Agreement or the
+** Beta Release License Agreement.
+**
+** GNU Lesser General Public License Usage
+** Alternatively, this file may be used under the terms of the GNU Lesser
+** 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
+** ensure the GNU Lesser General Public License version 2.1 requirements
+** will be met: http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html.
+**
+** In addition, as a special exception, Nokia gives you certain
+** additional rights. These rights are described in the Nokia Qt LGPL
+** Exception version 1.0, included in the file LGPL_EXCEPTION.txt in this
+** package.
+**
+** GNU General Public License Usage
+** Alternatively, this file may be used under the terms of the GNU
+** General Public License version 3.0 as published by the Free Software
+** Foundation and appearing in the file LICENSE.GPL included in the
+** packaging of this file.  Please review the following information to
+** ensure the GNU General Public License version 3.0 requirements will be
+** met: http://www.gnu.org/copyleft/gpl.html.
+**
+** If you are unsure which license is appropriate for your use, please
+** contact the sales department at qt-sales@nokia.com.
+** $QT_END_LICENSE$
+**
+****************************************************************************/
+
+#include "index.h"
+
+#include <QFile>
+#include <QDir>
+#include <QStringList>
+#include <QApplication>
+#include <QByteArray>
+#include <QTextStream>
+#include <QtAlgorithms>
+#include <QUrl>
+#include <QTextCodec>
+#include <ctype.h>
+#include <QTextDocument>
+
+QT_BEGIN_NAMESPACE
+
+struct Term {
+    Term() : frequency(-1) {}
+    Term( const QString &t, int f, QVector<Document> l ) : term( t ), frequency( f ), documents( l ) {}
+    QString term;
+    int frequency;
+    QVector<Document>documents;
+    bool operator<( const Term &i2 ) const { return frequency < i2.frequency; }
+};
+
+QDataStream &operator>>( QDataStream &s, Document &l )
+{
+    s >> l.docNumber;
+    s >> l.frequency;
+    return s;
+}
+
+QDataStream &operator<<( QDataStream &s, const Document &l )
+{
+    s << (qint16)l.docNumber;
+    s << (qint16)l.frequency;
+    return s;
+}
+
+Index::Index( const QString &dp, const QString &hp )
+    : QObject( 0 ), docPath( dp )
+{
+    Q_UNUSED(hp);
+
+    alreadyHaveDocList = false;
+    lastWindowClosed = false;
+    connect( qApp, SIGNAL(lastWindowClosed()),
+             this, SLOT(setLastWinClosed()) );
+}
+
+Index::Index( const QStringList &dl, const QString &hp )
+    : QObject( 0 )
+{
+    Q_UNUSED(hp);
+    docList = dl;
+    alreadyHaveDocList = true;
+    lastWindowClosed = false;
+    connect( qApp, SIGNAL(lastWindowClosed()),
+             this, SLOT(setLastWinClosed()) );
+}
+
+void Index::setLastWinClosed()
+{
+    lastWindowClosed = true;
+}
+
+void Index::setDictionaryFile( const QString &f )
+{
+    dictFile = f;
+}
+
+void Index::setDocListFile( const QString &f )
+{
+    docListFile = f;
+}
+
+void Index::setDocList( const QStringList &lst )
+{
+    docList = lst;
+}
+
+int Index::makeIndex()
+{
+    if ( !alreadyHaveDocList )
+        setupDocumentList();
+    if ( docList.isEmpty() )
+        return 1;
+    QStringList::Iterator it = docList.begin();
+    int steps = docList.count() / 100;
+    if ( !steps )
+        steps++;
+    int prog = 0;
+    for ( int i = 0; it != docList.end(); ++it, ++i ) {
+        if ( lastWindowClosed ) {
+            return -1;
+        }
+        QUrl url(*it);
+        parseDocument( url.toLocalFile(), i );
+        if ( i%steps == 0 ) {
+            prog++;
+            emit indexingProgress( prog );
+        }
+    }
+    return 0;
+}
+
+void Index::setupDocumentList()
+{
+    QDir d( docPath );
+    QStringList filters;
+    filters.append(QLatin1String("*.html"));
+    QStringList lst = d.entryList(filters);
+    QStringList::ConstIterator it = lst.constBegin();
+    for ( ; it != lst.constEnd(); ++it )
+        docList.append( QLatin1String("file:") + docPath + QLatin1String("/") + *it );
+}
+
+void Index::insertInDict( const QString &str, int docNum )
+{
+    if ( str == QLatin1String("amp") || str == QLatin1String("nbsp"))
+        return;
+    Entry *e = 0;
+    if ( dict.count() )
+        e = dict[ str ];
+
+    if ( e ) {
+        if ( e->documents.last().docNumber != docNum )
+            e->documents.append( Document(docNum, 1 ) );
+        else
+            e->documents.last().frequency++;
+    } else {
+        dict.insert( str, new Entry( docNum ) );
+    }
+}
+
+QString Index::getCharsetForDocument(QFile *file)
+{
+    QTextStream s(file);
+    QString contents = s.readAll();
+
+    QString encoding;
+    int start = contents.indexOf(QLatin1String("<meta"), 0, Qt::CaseInsensitive);
+    if (start > 0) {
+        int end = contents.indexOf(QLatin1String(">"), start);
+        QString meta = contents.mid(start+5, end-start);
+        meta = meta.toLower();
+        QRegExp r(QLatin1String("charset=([^\"\\s]+)"));
+        if (r.indexIn(meta) != -1) {
+            encoding = r.cap(1);        
+        }
+    }
+
+    file->seek(0);
+    if (encoding.isEmpty())
+        return QLatin1String("utf-8");
+    return encoding;
+}
+
+void Index::parseDocument( const QString &filename, int docNum )
+{
+    QFile file( filename );
+    if ( !file.open(QFile::ReadOnly) ) {
+        qWarning( "can not open file %s", qPrintable(filename) );
+        return;
+    }
+
+    QTextStream s(&file);
+    QString en = getCharsetForDocument(&file);
+    s.setCodec(QTextCodec::codecForName(en.toLatin1().constData()));
+
+    QString text = s.readAll();
+    if (text.isNull())
+        return;
+
+    bool valid = true;
+    const QChar *buf = text.unicode();
+    QChar str[64];
+    QChar c = buf[0];
+    int j = 0;
+    int i = 0;
+    while ( j < text.length() ) {
+        if ( c == QLatin1Char('<') || c == QLatin1Char('&') ) {
+            valid = false;
+            if ( i > 1 )
+                insertInDict( QString(str,i), docNum );
+            i = 0;
+            c = buf[++j];
+            continue;
+        }
+        if ( ( c == QLatin1Char('>') || c == QLatin1Char(';') ) && !valid ) {
+            valid = true;
+            c = buf[++j];
+            continue;
+        }
+        if ( !valid ) {
+            c = buf[++j];
+            continue;
+        }
+        if ( ( c.isLetterOrNumber() || c == QLatin1Char('_') ) && i < 63 ) {
+            str[i] = c.toLower();
+            ++i;
+        } else {
+            if ( i > 1 )
+                insertInDict( QString(str,i), docNum );
+            i = 0;
+        }
+        c = buf[++j];
+    }
+    if ( i > 1 )
+        insertInDict( QString(str,i), docNum );
+    file.close();
+}
+
+void Index::writeDict()
+{
+    QFile f( dictFile );
+    if ( !f.open(QFile::WriteOnly ) )
+        return;
+    QDataStream s( &f );
+    for(QHash<QString, Entry *>::Iterator it = dict.begin(); it != dict.end(); ++it) {
+        s << it.key();
+        s << it.value()->documents.count();
+        s << it.value()->documents;
+    }
+    f.close();
+    writeDocumentList();
+}
+
+void Index::writeDocumentList()
+{
+    QFile f( docListFile );
+    if ( !f.open(QFile::WriteOnly ) )
+        return;
+    QDataStream s( &f );
+    s << docList;
+}
+
+void Index::readDict()
+{
+    QFile f( dictFile );
+    if ( !f.open(QFile::ReadOnly ) )
+        return;
+
+    dict.clear();
+    QDataStream s( &f );
+    QString key;
+    int numOfDocs;
+    QVector<Document> docs;
+    while ( !s.atEnd() ) {
+        s >> key;
+        s >> numOfDocs;
+        docs.resize(numOfDocs);
+        s >> docs;
+        dict.insert( key, new Entry( docs ) );
+    }
+    f.close();
+    readDocumentList();
+}
+
+void Index::readDocumentList()
+{
+    QFile f( docListFile );
+    if ( !f.open(QFile::ReadOnly ) )
+        return;
+    QDataStream s( &f );
+    s >> docList;
+}
+
+QStringList Index::query( const QStringList &terms, const QStringList &termSeq, const QStringList &seqWords )
+{
+    QList<Term> termList;
+    for (QStringList::ConstIterator it = terms.begin(); it != terms.end(); ++it ) {
+        Entry *e = 0;
+        if ( (*it).contains(QLatin1Char('*')) ) {
+            QVector<Document> wcts = setupDummyTerm( getWildcardTerms( *it ) );
+            termList.append( Term(QLatin1String("dummy"), wcts.count(), wcts ) );
+        } else if ( dict[ *it ] ) {
+            e = dict[ *it ];
+            termList.append( Term( *it, e->documents.count(), e->documents ) );
+        } else {
+            return QStringList();
+        }
+    }
+    if ( !termList.count() )
+        return QStringList();
+    qSort(termList);
+
+    QVector<Document> minDocs = termList.takeFirst().documents;
+    for(QList<Term>::Iterator it = termList.begin(); it != termList.end(); ++it) {
+        Term *t = &(*it);
+        QVector<Document> docs = t->documents;
+        for(QVector<Document>::Iterator minDoc_it = minDocs.begin(); minDoc_it != minDocs.end(); ) {
+            bool found = false;
+            for (QVector<Document>::ConstIterator doc_it = docs.constBegin(); doc_it != docs.constEnd(); ++doc_it ) {
+                if ( (*minDoc_it).docNumber == (*doc_it).docNumber ) {
+                    (*minDoc_it).frequency += (*doc_it).frequency;
+                    found = true;
+                    break;
+                }
+            }
+            if ( !found )
+                minDoc_it = minDocs.erase( minDoc_it );
+            else
+                ++minDoc_it;
+        }
+    }
+
+    QStringList results;
+    qSort( minDocs );
+    if ( termSeq.isEmpty() ) {
+        for(QVector<Document>::Iterator it = minDocs.begin(); it != minDocs.end(); ++it)
+            results << docList.at((int)(*it).docNumber);
+        return results;
+    }
+
+    QString fileName;
+    for(QVector<Document>::Iterator it = minDocs.begin(); it != minDocs.end(); ++it) {
+        fileName =  docList[ (int)(*it).docNumber ];
+        if ( searchForPattern( termSeq, seqWords, fileName ) )
+            results << fileName;
+    }
+    return results;
+}
+
+QString Index::getDocumentTitle( const QString &fullFileName )
+{
+    QUrl url(fullFileName);
+    QString fileName = url.toLocalFile();
+
+    if (documentTitleCache.contains(fileName))
+        return documentTitleCache.value(fileName);
+
+    QFile file( fileName );
+    if ( !file.open( QFile::ReadOnly ) ) {
+        qWarning( "cannot open file %s", qPrintable(fileName) );
+        return fileName;
+    }
+    QTextStream s( &file );
+    QString text = s.readAll();
+
+    int start = text.indexOf(QLatin1String("<title>"), 0, Qt::CaseInsensitive) + 7;
+    int end = text.indexOf(QLatin1String("</title>"), 0, Qt::CaseInsensitive);
+
+    QString title = tr("Untitled");
+    if (end - start > 0) {
+        title = text.mid(start, end - start);
+        if (Qt::mightBeRichText(title)) {
+            QTextDocument doc;
+            doc.setHtml(title);
+            title = doc.toPlainText();
+        }
+    }
+    documentTitleCache.insert(fileName, title);
+    return title;
+}
+
+QStringList Index::getWildcardTerms( const QString &term )
+{
+    QStringList lst;
+    QStringList terms = split( term );
+    QStringList::Iterator iter;
+
+    for(QHash<QString, Entry*>::Iterator it = dict.begin(); it != dict.end(); ++it) {
+        int index = 0;
+        bool found = false;
+        QString text( it.key() );
+        for ( iter = terms.begin(); iter != terms.end(); ++iter ) {
+            if ( *iter == QLatin1String("*") ) {
+                found = true;
+                continue;
+            }
+            if ( iter == terms.begin() && (*iter)[0] != text[0] ) {
+                found = false;
+                break;
+            }
+            index = text.indexOf( *iter, index );
+            if ( *iter == terms.last() && index != (int)text.length()-1 ) {
+                index = text.lastIndexOf( *iter );
+                if ( index != (int)text.length() - (int)(*iter).length() ) {
+                    found = false;
+                    break;
+                }
+            }
+            if ( index != -1 ) {
+                found = true;
+                index += (*iter).length();
+                continue;
+            } else {
+                found = false;
+                break;
+            }
+        }
+        if ( found )
+            lst << text;
+    }
+
+    return lst;
+}
+
+QStringList Index::split( const QString &str )
+{
+    QStringList lst;
+    int j = 0;
+    int i = str.indexOf(QLatin1Char('*'), j );
+
+    if (str.startsWith(QLatin1String("*")))
+        lst << QLatin1String("*");
+
+    while ( i != -1 ) {
+        if ( i > j && i <= (int)str.length() ) {
+            lst << str.mid( j, i - j );
+            lst << QLatin1String("*");
+        }
+        j = i + 1;
+        i = str.indexOf(QLatin1Char('*'), j );
+    }
+
+    int l = str.length() - 1;
+    if ( str.mid( j, l - j + 1 ).length() > 0 )
+        lst << str.mid( j, l - j + 1 );
+
+    return lst;
+}
+
+QVector<Document> Index::setupDummyTerm( const QStringList &terms )
+{
+    QList<Term> termList;
+    for (QStringList::ConstIterator it = terms.begin(); it != terms.end(); ++it) {
+        Entry *e = 0;
+        if ( dict[ *it ] ) {
+            e = dict[ *it ];
+            termList.append( Term( *it, e->documents.count(), e->documents ) );
+        }
+    }
+    QVector<Document> maxList(0);
+    if ( !termList.count() )
+        return maxList;
+    qSort(termList);
+
+    maxList = termList.takeLast().documents;
+    for(QList<Term>::Iterator it = termList.begin(); it != termList.end(); ++it) {
+        Term *t = &(*it);
+        QVector<Document> docs = t->documents;
+        for (QVector<Document>::iterator docIt = docs.begin(); docIt != docs.end(); ++docIt ) {
+            if ( maxList.indexOf( *docIt ) == -1 )
+                maxList.append( *docIt );
+        }
+    }
+    return maxList;
+}
+
+void Index::buildMiniDict( const QString &str )
+{
+    if ( miniDict[ str ] )
+        miniDict[ str ]->positions.append( wordNum );
+    ++wordNum;
+}
+
+bool Index::searchForPattern( const QStringList &patterns, const QStringList &words, const QString &fileName )
+{
+    QUrl url(fileName);
+    QString fName = url.toLocalFile();
+    QFile file( fName );
+    if ( !file.open( QFile::ReadOnly ) ) {
+        qWarning( "cannot open file %s", qPrintable(fName) );
+        return false;
+    }
+
+    wordNum = 3;
+    miniDict.clear();
+    QStringList::ConstIterator cIt = words.begin();
+    for ( ; cIt != words.end(); ++cIt )
+        miniDict.insert( *cIt, new PosEntry( 0 ) );
+
+    QTextStream s( &file );
+    QString text = s.readAll();
+    bool valid = true;
+    const QChar *buf = text.unicode();
+    QChar str[64];
+    QChar c = buf[0];
+    int j = 0;
+    int i = 0;
+    while ( j < text.length() ) {
+        if ( c == QLatin1Char('<') || c == QLatin1Char('&') ) {
+            valid = false;
+            if ( i > 1 )
+                buildMiniDict( QString(str,i) );
+            i = 0;
+            c = buf[++j];
+            continue;
+        }
+        if ( ( c == QLatin1Char('>') || c == QLatin1Char(';') ) && !valid ) {
+            valid = true;
+            c = buf[++j];
+            continue;
+        }
+        if ( !valid ) {
+            c = buf[++j];
+            continue;
+        }
+        if ( ( c.isLetterOrNumber() || c == QLatin1Char('_') ) && i < 63 ) {
+            str[i] = c.toLower();
+            ++i;
+        } else {
+            if ( i > 1 )
+                buildMiniDict( QString(str,i) );
+            i = 0;
+        }
+        c = buf[++j];
+    }
+    if ( i > 1 )
+        buildMiniDict( QString(str,i) );
+    file.close();
+
+    QStringList::ConstIterator patIt = patterns.begin();
+    QStringList wordLst;
+    QList<uint> a, b;
+    QList<uint>::iterator aIt;
+    for ( ; patIt != patterns.end(); ++patIt ) {
+        wordLst = (*patIt).split(QLatin1Char(' '));
+        a = miniDict[ wordLst[0] ]->positions;
+        for ( int j = 1; j < (int)wordLst.count(); ++j ) {
+            b = miniDict[ wordLst[j] ]->positions;
+            aIt = a.begin();
+            while ( aIt != a.end() ) {
+                if ( b.contains( *aIt + 1 )) {
+                    (*aIt)++;
+                    ++aIt;
+                } else {
+                    aIt = a.erase( aIt );
+                }
+            }
+        }
+    }
+    if ( a.count() )
+        return true;
+    return false;
+}
+
+QT_END_NAMESPACE