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zim.cc
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/* This file is (c) 2012 Abs62
* Part of GoldenDict. Licensed under GPLv3 or later, see the LICENSE file */
#ifdef MAKE_ZIM_SUPPORT
#include "zim.hh"
#include "btreeidx.hh"
#include "fsencoding.hh"
#include "folding.hh"
#include "gddebug.hh"
#include "utf8.hh"
#include "decompress.hh"
#include "langcoder.hh"
#include "wstring_qt.hh"
#include "filetype.hh"
#include "file.hh"
#include "qt4x5.hh"
#include "tiff.hh"
#include "ftshelpers.hh"
#include "htmlescape.hh"
#include "splitfile.hh"
#ifdef _MSC_VER
#include <stub_msvc.h>
#endif
#include <QByteArray>
#include <QFile>
#include <QFileInfo>
#include <QString>
#include <QRunnable>
#include <QSemaphore>
#include <QAtomicInt>
#include <QImage>
#include <QDir>
#include <QDebug>
#include <string>
#include <set>
#include <map>
namespace Zim {
using std::string;
using std::map;
using std::vector;
using std::multimap;
using std::pair;
using std::set;
using gd::wstring;
using BtreeIndexing::WordArticleLink;
using BtreeIndexing::IndexedWords;
using BtreeIndexing::IndexInfo;
DEF_EX_STR( exNotZimFile, "Not an Zim file", Dictionary::Ex )
DEF_EX_STR( exCantReadFile, "Can't read file", Dictionary::Ex )
DEF_EX( exUserAbort, "User abort", Dictionary::Ex )
//namespace {
class ZimFile;
#pragma pack( push, 1 )
enum CompressionType
{
Default = 0, None, Zlib, Bzip2, Lzma2
};
/// Zim file header
struct ZIM_header
{
quint32 magicNumber;
quint32 version;
quint8 uuid[ 16 ];
quint32 articleCount;
quint32 clusterCount;
quint64 urlPtrPos;
quint64 titlePtrPos;
quint64 clusterPtrPos;
quint64 mimeListPos;
quint32 mainPage;
quint32 layoutPage;
quint64 checksumPos;
}
#ifndef _MSC_VER
__attribute__((packed))
#endif
;
struct ArticleEntry
{
quint16 mimetype;
quint8 parameterLen;
char nameSpace;
quint32 revision;
quint32 clusterNumber;
quint32 blobNumber;
}
#ifndef _MSC_VER
__attribute__((packed))
#endif
;
struct RedirectEntry
{
quint16 mimetype;
quint8 parameterLen;
char nameSpace;
quint32 revision;
quint32 redirectIndex;
}
#ifndef _MSC_VER
__attribute__((packed))
#endif
;
enum
{
Signature = 0x584D495A, // ZIMX on little-endian, XMIZ on big-endian
CurrentFormatVersion = 1 + BtreeIndexing::FormatVersion + Folding::Version
};
struct IdxHeader
{
quint32 signature; // First comes the signature, ZIMX
quint32 formatVersion; // File format version (CurrentFormatVersion)
quint32 indexBtreeMaxElements; // Two fields from IndexInfo
quint32 indexRootOffset;
quint32 resourceIndexBtreeMaxElements; // Two fields from IndexInfo
quint32 resourceIndexRootOffset;
quint32 wordCount;
quint32 articleCount;
quint32 namePtr;
quint32 descriptionPtr;
quint32 langFrom; // Source language
quint32 langTo; // Target language
}
#ifndef _MSC_VER
__attribute__((packed))
#endif
;
#pragma pack( pop )
// Class for support of split zim files
class ZimFile : public SplitFile::SplitFile
{
public:
ZimFile();
ZimFile( const QString & name );
~ZimFile();
virtual void setFileName( const QString & name );
};
ZimFile::ZimFile()
{
}
ZimFile::ZimFile( const QString & name )
{
setFileName( name );
}
ZimFile::~ZimFile()
{
}
void ZimFile::setFileName( const QString & name )
{
close();
appendFile( name );
if( name.endsWith( ".zimaa", Qt::CaseInsensitive ) )
{
QString fname = name;
for( int i = 0; i < 26; i++ )
{
fname[ fname.size() - 2 ] = (char)( 'a' + i );
int j;
for( j = 1; j < 26; j++ )
{
fname[ fname.size() - 1 ] = (char)( 'a' + j );
if( !QFileInfo( fname ).isFile() )
break;
appendFile( fname );
}
if( j < 26 )
break;
}
}
}
// Some supporting functions
bool indexIsOldOrBad( string const & indexFile )
{
File::Class idx( indexFile, "rb" );
IdxHeader header;
return idx.readRecords( &header, sizeof( header ), 1 ) != 1 ||
header.signature != Signature ||
header.formatVersion != CurrentFormatVersion;
}
quint32 readArticle( ZimFile & file, ZIM_header & header, quint32 articleNumber, string & result,
set< quint32 > * loadedArticles = NULL )
{
result.clear();
while( 1 )
{
if( articleNumber >= header.articleCount )
break;
file.seek( header.urlPtrPos + (quint64)articleNumber * 8 );
quint64 pos;
if( file.read( reinterpret_cast< char * >( &pos ), sizeof(pos) ) != sizeof(pos) )
break;
// Read article info
quint16 mimetype;
file.seek( pos );
if( file.read( reinterpret_cast< char * >( &mimetype ), sizeof(mimetype) ) != sizeof(mimetype) )
break;
if( mimetype == 0xFFFF ) // Redirect to other article
{
RedirectEntry redEntry;
if( file.read( reinterpret_cast< char * >( &redEntry ) + 2, sizeof(redEntry) - 2 ) != sizeof(redEntry) - 2 )
break;
if( articleNumber == redEntry.redirectIndex )
break;
articleNumber = redEntry.redirectIndex;
continue;
}
if( loadedArticles && loadedArticles->find( articleNumber ) != loadedArticles->end() )
break;
ArticleEntry artEntry;
artEntry.mimetype = mimetype;
if( file.read( reinterpret_cast< char * >( &artEntry ) + 2, sizeof(artEntry) - 2 ) != sizeof(artEntry) - 2 )
break;
// Read cluster pointers
quint64 clusters[ 2 ];
file.seek( header.clusterPtrPos + (quint64)artEntry.clusterNumber * 8 );
if( file.read( reinterpret_cast< char * >( clusters ), sizeof(clusters) ) != sizeof(clusters) )
break;
// Calculate cluster size
quint64 clusterSize;
if( artEntry.clusterNumber < header.clusterCount - 1 )
clusterSize = clusters[ 1 ] - clusters[ 0 ];
else
clusterSize = file.size() - clusters[ 0 ];
// Read cluster data
file.seek( clusters[ 0 ] );
char compressionType;
if( !file.getChar( &compressionType ) )
break;
string decompressedData;
QByteArray data = file.read( clusterSize );
if( compressionType == Default || compressionType == None )
decompressedData = string( data.data(), data.size() );
else
if( compressionType == Zlib )
decompressedData = decompressZlib( data.constData(), data.size() );
else
if( compressionType == Bzip2 )
decompressedData = decompressBzip2( data.constData(), data.size() );
else
if( compressionType == Lzma2 )
decompressedData = decompressLzma2( data.constData(), data.size() );
else
break;
// Take article data from cluster
quint32 blobCount;
memcpy( &blobCount, decompressedData.data(), sizeof(blobCount) );
if( artEntry.blobNumber > blobCount )
break;
quint32 offsets[ 2 ];
memcpy( offsets, decompressedData.data() + artEntry.blobNumber * 4, sizeof(offsets) );
quint32 size = offsets[ 1 ] - offsets[ 0 ];
result.append( decompressedData, offsets[ 0 ], size );
return articleNumber;
}
return 0xFFFFFFFF;
}
// ZimDictionary
class ZimDictionary: public BtreeIndexing::BtreeDictionary
{
enum LINKS_TYPE { UNKNOWN, SLASH, NO_SLASH };
Mutex idxMutex;
Mutex zimMutex, idxResourceMutex;
File::Class idx;
BtreeIndex resourceIndex;
IdxHeader idxHeader;
string dictionaryName;
ZimFile df;
ZIM_header zimHeader;
set< quint32 > articlesIndexedForFTS;
LINKS_TYPE linksType;
public:
ZimDictionary( string const & id, string const & indexFile,
vector< string > const & dictionaryFiles );
~ZimDictionary();
virtual string getName() throw()
{ return dictionaryName; }
virtual map< Dictionary::Property, string > getProperties() throw()
{ return map< Dictionary::Property, string >(); }
virtual unsigned long getArticleCount() throw()
{ return idxHeader.articleCount; }
virtual unsigned long getWordCount() throw()
{ return idxHeader.wordCount; }
inline virtual quint32 getLangFrom() const
{ return idxHeader.langFrom; }
inline virtual quint32 getLangTo() const
{ return idxHeader.langTo; }
virtual sptr< Dictionary::DataRequest > getArticle( wstring const &,
vector< wstring > const & alts,
wstring const & )
throw( std::exception );
virtual sptr< Dictionary::DataRequest > getResource( string const & name )
throw( std::exception );
virtual QString const& getDescription();
/// Loads the resource.
void loadResource( std::string &resourceName, string & data );
virtual sptr< Dictionary::DataRequest > getSearchResults( QString const & searchString,
int searchMode, bool matchCase,
int distanceBetweenWords,
int maxResults );
virtual void getArticleText( uint32_t articleAddress, QString & headword, QString & text );
quint32 getArticleText( uint32_t articleAddress, QString & headword, QString & text,
set< quint32 > * loadedArticles );
virtual void makeFTSIndex(QAtomicInt & isCancelled, bool firstIteration );
virtual void setFTSParameters( Config::FullTextSearch const & fts )
{
can_FTS = fts.enabled
&& !fts.disabledTypes.contains( "ZIM", Qt::CaseInsensitive )
&& ( fts.maxDictionarySize == 0 || getArticleCount() <= fts.maxDictionarySize );
}
protected:
virtual void loadIcon() throw();
private:
/// Loads the article.
quint32 loadArticle( quint32 address,
string & articleText,
set< quint32 > * loadedArticles,
bool rawText = false );
string convert( string const & in_data );
friend class ZimArticleRequest;
friend class ZimResourceRequest;
};
ZimDictionary::ZimDictionary( string const & id,
string const & indexFile,
vector< string > const & dictionaryFiles ):
BtreeDictionary( id, dictionaryFiles ),
idx( indexFile, "rb" ),
idxHeader( idx.read< IdxHeader >() ),
df( FsEncoding::decode( dictionaryFiles[ 0 ].c_str() ) ),
linksType( UNKNOWN )
{
// Open data file
df.open( QFile::ReadOnly );
memset( &zimHeader, 0, sizeof(zimHeader) );
df.read( reinterpret_cast< char * >( &zimHeader ), sizeof( zimHeader ) );
// Initialize the indexes
openIndex( IndexInfo( idxHeader.indexBtreeMaxElements,
idxHeader.indexRootOffset ),
idx, idxMutex );
resourceIndex.openIndex( IndexInfo( idxHeader.resourceIndexBtreeMaxElements,
idxHeader.resourceIndexRootOffset ),
idx, idxResourceMutex );
// Read dictionary name
if( idxHeader.namePtr == 0xFFFFFFFF )
{
QString name = QDir::fromNativeSeparators( FsEncoding::decode( dictionaryFiles[ 0 ].c_str() ) );
int n = name.lastIndexOf( '/' );
dictionaryName = string( name.mid( n + 1 ).toUtf8().constData() );
}
else
{
readArticle( df, zimHeader, idxHeader.namePtr, dictionaryName );
}
// Full-text search parameters
can_FTS = true;
ftsIdxName = indexFile + "_FTS";
if( !Dictionary::needToRebuildIndex( dictionaryFiles, ftsIdxName )
&& !FtsHelpers::ftsIndexIsOldOrBad( ftsIdxName, this ) )
FTS_index_completed.ref();
}
ZimDictionary::~ZimDictionary()
{
df.close();
}
void ZimDictionary::loadIcon() throw()
{
if ( dictionaryIconLoaded )
return;
QString fileName =
QDir::fromNativeSeparators( FsEncoding::decode( getDictionaryFilenames()[ 0 ].c_str() ) );
// Remove the extension
fileName.chop( 3 );
if( !loadIconFromFile( fileName ) )
{
// Load failed -- use default icons
dictionaryNativeIcon = dictionaryIcon = QIcon(":/icons/icon32_zim.png");
}
dictionaryIconLoaded = true;
}
quint32 ZimDictionary::loadArticle( quint32 address,
string & articleText,
set< quint32 > * loadedArticles,
bool rawText )
{
quint32 ret;
{
Mutex::Lock _( zimMutex );
ret = readArticle( df, zimHeader, address, articleText, loadedArticles );
}
if( !rawText )
articleText = convert( articleText );
return ret;
}
string ZimDictionary::convert( const string & in )
{
QString text = QString::fromUtf8( in.c_str() );
// replace background
text.replace( QRegExp( "<\\s*body\\s*([^>]*)(background(|-color)):([^;\"]*(|;))" ),
QString( "<body \\1" ) );
// pattern of img and script
text.replace( QRegExp( "<\\s*(img|script)\\s*([^>]*)src=(\"|)(\\.\\.|)/" ),
QString( "<\\1 \\2src=\\3bres://%1/").arg( getId().c_str() ) );
// Fix links without '"'
text.replace( QRegExp( "href=(\\.\\.|)/([^\\s>]+)" ), QString( "href=\"\\1/\\2\"" ) );
// pattern <link... href="..." ...>
text.replace( QRegExp( "<\\s*link\\s*([^>]*)href=\"(\\.\\.|)/" ),
QString( "<link \\1href=\"bres://%1/").arg( getId().c_str() ) );
// localize the http://en.wiki***.com|org/wiki/<key> series links
// excluding those keywords that have ":" in it
QString urlWiki = "\"http(s|)://en\\.(wiki(pedia|books|news|quote|source|voyage|versity)|wiktionary)\\.(org|com)/wiki/([^:\"]*)\"";
text.replace( QRegExp( "<\\s*a\\s+(class=\"external\"\\s+|)href=" + urlWiki ),
QString( "<a href=\"gdlookup://localhost/\\6\"" ) );
// pattern <a href="..." ...>, excluding any known protocols such as http://, mailto:, #(comment)
// these links will be translated into local definitions
QRegExp rxLink( "<\\s*a\\s+([^>]*)href=\"(?!(\\w+://|#|mailto:|tel:))(/|)([^\"]*)\"\\s*(title=\"[^\"]*\")?[^>]*>",
Qt::CaseSensitive,
QRegExp::RegExp2 );
int pos = 0;
while( (pos = rxLink.indexIn( text, pos )) >= 0 )
{
QStringList list = rxLink.capturedTexts();
QString tag = list[3]; // a url, ex: Precambrian_Chaotian.html
if ( !list[4].isEmpty() ) // a title, ex: title="Precambrian/Chaotian"
tag = list[4].split("\"")[1];
// Check type of links inside articles
if( linksType == UNKNOWN && tag.indexOf( '/' ) >= 0 )
{
QString word = QUrl::fromPercentEncoding( tag.toLatin1() );
word.remove( QRegExp( "\\.(s|)htm(l|)$", Qt::CaseInsensitive ) ).
replace( "_", " " );
vector< WordArticleLink > links;
links = findArticles( gd::toWString( word ) );
if( !links.empty() )
{
linksType = SLASH;
}
else
{
word.remove( QRegExp(".*/") );
links = findArticles( gd::toWString( word ) );
if( !links.empty() )
{
linksType = NO_SLASH;
links.clear();
}
}
}
if( linksType == SLASH || linksType == UNKNOWN )
{
tag.remove( QRegExp( "\\.(s|)htm(l|)$", Qt::CaseInsensitive ) ).
replace( "_", "%20" ).
prepend( "<a href=\"gdlookup://localhost/" ).
append( "\" " + list[4] + ">" );
}
else
{
tag.remove( QRegExp(".*/") ).
remove( QRegExp( "\\.(s|)htm(l|)$", Qt::CaseInsensitive ) ).
replace( "_", "%20" ).
prepend( "<a href=\"gdlookup://localhost/" ).
append( "\" " + list[4] + ">" );
}
text.replace( pos, list[0].length(), tag );
pos += tag.length() + 1;
}
// Occassionally words needs to be displayed in vertical, but <br/> were changed to <br\> somewhere
// proper style: <a href="gdlookup://localhost/Neoptera" ... >N<br/>e<br/>o<br/>p<br/>t<br/>e<br/>r<br/>a</a>
QRegExp rxBR( "(<a href=\"gdlookup://localhost/[^\"]*\"\\s*[^>]*>)\\s*((\\w\\s*<br(\\\\|/|)>\\s*)+\\w)\\s*</a>",
Qt::CaseSensitive,
QRegExp::RegExp2 );
pos = 0;
while( (pos = rxBR.indexIn( text, pos )) >= 0 )
{
QStringList list = rxBR.capturedTexts();
QString tag = list[2];
tag.replace( QRegExp( "<br( |)(\\\\|/|)>", Qt::CaseInsensitive ) , "<br/>" ).
prepend( list[1] ).
append( "</a>" );
text.replace( pos, list[0].length(), tag );
pos += tag.length() + 1;
}
// // output all links in the page - only for analysis
// QRegExp rxPrintAllLinks( "<\\s*a\\s+[^>]*href=\"[^\"]*\"[^>]*>",
// Qt::CaseSensitive,
// QRegExp::RegExp2 );
// pos = 0;
// while( (pos = rxPrintAllLinks.indexIn( text, pos )) >= 0 )
// {
// QStringList list = rxPrintAllLinks.capturedTexts();
// qDebug() << "\n--Alllinks--" << list[0];
// pos += list[0].length() + 1;
// }
// Fix outstanding elements
text += "<br style=\"clear:both;\" />";
return text.toUtf8().data();
}
void ZimDictionary::loadResource( std::string & resourceName, string & data )
{
vector< WordArticleLink > link;
string resData;
link = resourceIndex.findArticles( Utf8::decode( resourceName ) );
if( link.empty() )
return;
{
Mutex::Lock _( zimMutex );
readArticle( df, zimHeader, link[ 0 ].articleOffset, data );
}
}
QString const& ZimDictionary::getDescription()
{
if( !dictionaryDescription.isEmpty() || idxHeader.descriptionPtr == 0xFFFFFFFF )
return dictionaryDescription;
string str;
{
Mutex::Lock _( zimMutex );
readArticle( df, zimHeader, idxHeader.descriptionPtr, str );
}
if( !str.empty() )
dictionaryDescription = QString::fromUtf8( str.c_str(), str.size() );
return dictionaryDescription;
}
void ZimDictionary::makeFTSIndex( QAtomicInt & isCancelled, bool firstIteration )
{
if( !( Dictionary::needToRebuildIndex( getDictionaryFilenames(), ftsIdxName )
|| FtsHelpers::ftsIndexIsOldOrBad( ftsIdxName, this ) ) )
FTS_index_completed.ref();
if( haveFTSIndex() )
return;
if( ensureInitDone().size() )
return;
if( firstIteration )
return;
gdDebug( "Zim: Building the full-text index for dictionary: %s\n",
getName().c_str() );
try
{
Mutex::Lock _( getFtsMutex() );
File::Class ftsIdx( ftsIndexName(), "wb" );
FtsHelpers::FtsIdxHeader ftsIdxHeader;
memset( &ftsIdxHeader, 0, sizeof( ftsIdxHeader ) );
// We write a dummy header first. At the end of the process the header
// will be rewritten with the right values.
ftsIdx.write( ftsIdxHeader );
ChunkedStorage::Writer chunks( ftsIdx );
BtreeIndexing::IndexedWords indexedWords;
QSet< uint32_t > setOfOffsets;
findArticleLinks( 0, &setOfOffsets, 0, &isCancelled );
if( Qt4x5::AtomicInt::loadAcquire( isCancelled ) )
throw exUserAbort();
QVector< uint32_t > offsets;
offsets.resize( setOfOffsets.size() );
uint32_t * ptr = &offsets.front();
for( QSet< uint32_t >::ConstIterator it = setOfOffsets.constBegin();
it != setOfOffsets.constEnd(); ++it )
{
*ptr = *it;
ptr++;
}
// Free memory
setOfOffsets.clear();
if( Qt4x5::AtomicInt::loadAcquire( isCancelled ) )
throw exUserAbort();
qSort( offsets );
if( Qt4x5::AtomicInt::loadAcquire( isCancelled ) )
throw exUserAbort();
QMap< QString, QVector< uint32_t > > ftsWords;
set< quint32 > indexedArticles;
quint32 articleNumber;
// index articles for full-text search
for( int i = 0; i < offsets.size(); i++ )
{
if( Qt4x5::AtomicInt::loadAcquire( isCancelled ) )
throw exUserAbort();
QString headword, articleStr;
articleNumber = getArticleText( offsets.at( i ), headword, articleStr,
&indexedArticles );
if( articleNumber == 0xFFFFFFFF )
continue;
indexedArticles.insert( articleNumber );
FtsHelpers::parseArticleForFts( offsets.at( i ), articleStr, ftsWords );
}
// Free memory
offsets.clear();
QMap< QString, QVector< uint32_t > >::iterator it = ftsWords.begin();
while( it != ftsWords.end() )
{
if( Qt4x5::AtomicInt::loadAcquire( isCancelled ) )
throw exUserAbort();
uint32_t offset = chunks.startNewBlock();
uint32_t size = it.value().size();
chunks.addToBlock( &size, sizeof(uint32_t) );
chunks.addToBlock( it.value().data(), size * sizeof(uint32_t) );
indexedWords.addSingleWord( gd::toWString( it.key() ), offset );
it = ftsWords.erase( it );
}
// Free memory
ftsWords.clear();
if( Qt4x5::AtomicInt::loadAcquire( isCancelled ) )
throw exUserAbort();
ftsIdxHeader.chunksOffset = chunks.finish();
ftsIdxHeader.wordCount = indexedWords.size();
if( Qt4x5::AtomicInt::loadAcquire( isCancelled ) )
throw exUserAbort();
BtreeIndexing::IndexInfo ftsIdxInfo = BtreeIndexing::buildIndex( indexedWords, ftsIdx );
// Free memory
indexedWords.clear();
ftsIdxHeader.indexBtreeMaxElements = ftsIdxInfo.btreeMaxElements;
ftsIdxHeader.indexRootOffset = ftsIdxInfo.rootOffset;
ftsIdxHeader.signature = FtsHelpers::FtsSignature;
ftsIdxHeader.formatVersion = FtsHelpers::CurrentFtsFormatVersion + getFtsIndexVersion();
ftsIdx.rewind();
ftsIdx.writeRecords( &ftsIdxHeader, sizeof(ftsIdxHeader), 1 );
FTS_index_completed.ref();
}
catch( std::exception &ex )
{
gdWarning( "Zim: Failed building full-text search index for \"%s\", reason: %s\n", getName().c_str(), ex.what() );
QFile::remove( FsEncoding::decode( ftsIdxName.c_str() ) );
}
}
void ZimDictionary::getArticleText( uint32_t articleAddress, QString & headword, QString & text )
{
try
{
headword.clear();
string articleText;
loadArticle( articleAddress, articleText, 0, true );
text = Html::unescape( QString::fromUtf8( articleText.data(), articleText.size() ) );
}
catch( std::exception &ex )
{
gdWarning( "Zim: Failed retrieving article from \"%s\", reason: %s\n", getName().c_str(), ex.what() );
}
}
quint32 ZimDictionary::getArticleText( uint32_t articleAddress, QString & headword, QString & text,
set< quint32 > * loadedArticles )
{
quint32 articleNumber = 0xFFFFFFFF;
try
{
headword.clear();
string articleText;
articleNumber = loadArticle( articleAddress, articleText, loadedArticles, true );
text = Html::unescape( QString::fromUtf8( articleText.data(), articleText.size() ) );
}
catch( std::exception &ex )
{
gdWarning( "Zim: Failed retrieving article from \"%s\", reason: %s\n", getName().c_str(), ex.what() );
}
return articleNumber;
}
sptr< Dictionary::DataRequest > ZimDictionary::getSearchResults( QString const & searchString,
int searchMode, bool matchCase,
int distanceBetweenWords,
int maxResults )
{
return new FtsHelpers::FTSResultsRequest( *this, searchString,searchMode, matchCase, distanceBetweenWords, maxResults );
}
/// ZimDictionary::getArticle()
class ZimArticleRequest;
class ZimArticleRequestRunnable: public QRunnable
{
ZimArticleRequest & r;
QSemaphore & hasExited;
public:
ZimArticleRequestRunnable( ZimArticleRequest & r_,
QSemaphore & hasExited_ ): r( r_ ),
hasExited( hasExited_ )
{}
~ZimArticleRequestRunnable()
{
hasExited.release();
}
virtual void run();
};
class ZimArticleRequest: public Dictionary::DataRequest
{
friend class ZimArticleRequestRunnable;
wstring word;
vector< wstring > alts;
ZimDictionary & dict;
QAtomicInt isCancelled;
QSemaphore hasExited;
public:
ZimArticleRequest( wstring const & word_,
vector< wstring > const & alts_,
ZimDictionary & dict_ ):
word( word_ ), alts( alts_ ), dict( dict_ )
{
QThreadPool::globalInstance()->start(
new ZimArticleRequestRunnable( *this, hasExited ) );
}
void run(); // Run from another thread by ZimArticleRequestRunnable
virtual void cancel()
{
isCancelled.ref();
}
~ZimArticleRequest()
{
isCancelled.ref();
hasExited.acquire();
}
};
void ZimArticleRequestRunnable::run()
{
r.run();
}
void ZimArticleRequest::run()
{
if ( Qt4x5::AtomicInt::loadAcquire( isCancelled ) )
{
finish();
return;
}
vector< WordArticleLink > chain = dict.findArticles( word );
for( unsigned x = 0; x < alts.size(); ++x )
{
/// Make an additional query for each alt
vector< WordArticleLink > altChain = dict.findArticles( alts[ x ] );
chain.insert( chain.end(), altChain.begin(), altChain.end() );
}
multimap< wstring, pair< string, string > > mainArticles, alternateArticles;
set< quint32 > articlesIncluded; // Some synonims make it that the articles
// appear several times. We combat this
// by only allowing them to appear once.
wstring wordCaseFolded = Folding::applySimpleCaseOnly( word );
for( unsigned x = 0; x < chain.size(); ++x )
{
if ( Qt4x5::AtomicInt::loadAcquire( isCancelled ) )
{
finish();
return;
}
// Now grab that article
string headword, articleText;
headword = chain[ x ].word;
quint32 articleNumber = 0xFFFFFFFF;
try
{
articleNumber = dict.loadArticle( chain[ x ].articleOffset, articleText, &articlesIncluded );
}
catch(...)
{
}
if( articleNumber == 0xFFFFFFFF )
continue; // No article loaded
if ( articlesIncluded.find( articleNumber ) != articlesIncluded.end() )
continue; // We already have this article in the body.
// Ok. Now, does it go to main articles, or to alternate ones? We list
// main ones first, and alternates after.
// We do the case-folded comparison here.
wstring headwordStripped =
Folding::applySimpleCaseOnly( Utf8::decode( headword ) );
multimap< wstring, pair< string, string > > & mapToUse =
( wordCaseFolded == headwordStripped ) ?
mainArticles : alternateArticles;
mapToUse.insert( pair< wstring, pair< string, string > >(
Folding::applySimpleCaseOnly( Utf8::decode( headword ) ),
pair< string, string >( headword, articleText ) ) );
articlesIncluded.insert( articleNumber );
}
if ( mainArticles.empty() && alternateArticles.empty() )
{
// No such word
finish();
return;
}
string result;
// See Issue #271: A mechanism to clean-up invalid HTML cards.
string cleaner = "</font>""</font>""</font>""</font>""</font>""</font>"
"</font>""</font>""</font>""</font>""</font>""</font>"
"</b></b></b></b></b></b></b></b>"
"</i></i></i></i></i></i></i></i>"
"</a></a></a></a></a></a></a></a>";
multimap< wstring, pair< string, string > >::const_iterator i;
for( i = mainArticles.begin(); i != mainArticles.end(); ++i )
{
result += "<div class=\"zimdict\">";
result += "<h2 class=\"zimdict_headword\">";
result += i->second.first;
result += "</h2>";