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gls.cc
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/* This file is (c) 2008-2017 Abs62
* Part of GoldenDict. Licensed under GPLv3 or later, see the LICENSE file */
#include <zlib.h>
#include "gls.hh"
#include "iconv.hh"
#include "dictionary.hh"
#include "ufile.hh"
#include "btreeidx.hh"
#include "folding.hh"
#include "gddebug.hh"
#include "utf8.hh"
#include "wstring_qt.hh"
#include "chunkedstorage.hh"
#include "langcoder.hh"
#include "dictzip.h"
#include "indexedzip.hh"
#include "ftshelpers.hh"
#include "fsencoding.hh"
#include "htmlescape.hh"
#include "filetype.hh"
#include "tiff.hh"
#include <QString>
#include <QSemaphore>
#include <QThreadPool>
#include <QAtomicInt>
// For TIFF conversion
#include <QImage>
#include <QByteArray>
#include <QBuffer>
#include <string>
#include <list>
#include <map>
#include <set>
#ifdef _MSC_VER
#include <stub_msvc.h>
#endif
namespace Gls {
using std::list;
using std::map;
using std::set;
using std::multimap;
using std::pair;
using gd::wstring;
using gd::wchar;
using BtreeIndexing::WordArticleLink;
using BtreeIndexing::IndexedWords;
using BtreeIndexing::IndexInfo;
enum Encoding
{
Utf8,
Utf16LE,
Utf16BE
};
/////////////// GlsScanner
class GlsScanner
{
gzFile f;
Encoding encoding;
Iconv iconv;
wstring dictionaryName;
wstring dictionaryDecription, dictionaryAuthor;
wstring langFrom, langTo;
char readBuffer[ 65536 ];
char * readBufferPtr;
size_t readBufferLeft;
vector< wchar > wcharBuffer;
unsigned linesRead;
public:
DEF_EX( Ex, "Gls scanner exception", Dictionary::Ex )
DEF_EX_STR( exCantOpen, "Can't open .gls file", Ex )
DEF_EX( exCantReadGlsFile, "Can't read .gls file", Ex )
DEF_EX_STR( exMalformedGlsFile, "The .gls file is malformed:", Ex )
DEF_EX( exEncodingError, "Encoding error", Ex ) // Should never happen really
GlsScanner( string const & fileName ) throw( Ex, Iconv::Ex );
~GlsScanner() throw();
/// Returns the detected encoding of this file.
Encoding getEncoding() const
{ return encoding; }
/// Returns the dictionary's name, as was read from file's headers.
wstring const & getDictionaryName() const
{ return dictionaryName; }
/// Returns the dictionary's author, as was read from file's headers.
wstring const & getDictionaryAuthor() const
{ return dictionaryAuthor; }
/// Returns the dictionary's description, as was read from file's headers.
wstring const & getDictionaryDescription() const
{ return dictionaryDecription; }
/// Returns the dictionary's source language, as was read from file's headers.
wstring const & getLangFrom() const
{ return langFrom; }
/// Returns the dictionary's target language, as was read from file's headers.
wstring const & getLangTo() const
{ return langTo; }
/// Reads next line from the file. Returns true if reading succeeded --
/// the string gets stored in the one passed, along with its physical
/// file offset in the file (the uncompressed one if the file is compressed).
/// If end of file is reached, false is returned.
/// Reading begins from the first line after the headers (ones which end
/// by the "### Glossary section:" line).
bool readNextLine( wstring &, size_t & offset ) throw( Ex, Iconv::Ex );
/// Returns the number of lines read so far from the file.
unsigned getLinesRead() const
{ return linesRead; }
/// Returns a name to be passed to iconv for the given encoding.
static char const * getEncodingNameFor( Encoding e )
{
switch( e )
{
case Utf16LE:
return Iconv::Utf16Le;
case Utf16BE:
return "UTF-16BE";
case Utf8:
default:
return Iconv::Utf8;
}
}
};
GlsScanner::GlsScanner( string const & fileName ) throw( Ex, Iconv::Ex ):
encoding( Utf8 ), iconv( Iconv::GdWchar, Iconv::Utf8 ), readBufferPtr( readBuffer ),
readBufferLeft( 0 ), wcharBuffer( 64 ), linesRead( 0 )
{
// Since .dz is backwards-compatible with .gz, we use gz- functions to
// read it -- they are much nicer than the dict_data- ones.
f = gd_gzopen( fileName.c_str() );
if ( !f )
throw exCantOpen( fileName );
// Now try guessing the encoding by reading the first two bytes
unsigned char firstBytes[ 2 ];
if ( gzread( f, firstBytes, sizeof( firstBytes ) ) != sizeof( firstBytes ) )
{
// Apparently the file's too short
gzclose( f );
throw exMalformedGlsFile( fileName );
}
// If the file begins with the dedicated Unicode marker, we just consume
// it. If, on the other hand, it's not, we return the bytes back
if ( firstBytes[ 0 ] == 0xFF && firstBytes[ 1 ] == 0xFE )
encoding = Utf16LE;
else
if ( firstBytes[ 0 ] == 0xFE && firstBytes[ 1 ] == 0xFF )
encoding = Utf16BE;
else
if ( firstBytes[ 0 ] == 0xEF && firstBytes[ 1 ] == 0xBB )
{
// Looks like Utf8, read one more byte
if ( gzread( f, firstBytes, 1 ) != 1 || firstBytes[ 0 ] != 0xBF )
{
// Either the file's too short, or the BOM is weird
gzclose( f );
throw exMalformedGlsFile( fileName );
}
encoding = Utf8;
}
else
{
if ( gzrewind( f ) )
{
gzclose( f );
throw exCantOpen( fileName );
}
encoding = Utf8;
}
if( encoding != Utf8 )
iconv.reinit( Iconv::GdWchar, getEncodingNameFor( encoding ) );
// We now can use our own readNextLine() function
wstring str;
wstring *currentField = 0;
wstring mark = GD_NATIVE_TO_WS( L"###" );
wstring titleMark = GD_NATIVE_TO_WS( L"### Glossary title:" );
wstring authorMark = GD_NATIVE_TO_WS( L"### Author:" );
wstring descriptionMark = GD_NATIVE_TO_WS( L"### Description:" );
wstring langFromMark = GD_NATIVE_TO_WS( L"### Source language:" );
wstring langToMark = GD_NATIVE_TO_WS( L"### Target language:" );
wstring endOfHeaderMark = GD_NATIVE_TO_WS( L"### Glossary section:" );
size_t offset;
for( ; ; )
{
if ( !readNextLine( str, offset ) )
{
gzclose( f );
throw exMalformedGlsFile( fileName );
}
if( str.compare( 0, 3, mark.c_str(), 3 ) == 0 )
{
currentField = 0;
if( str.compare( 0, titleMark.size(), titleMark ) == 0 )
{
dictionaryName = wstring( str, titleMark.size(), str.size() - titleMark.size() );
currentField = &dictionaryName;
}
else
if( str.compare( 0, authorMark.size(), authorMark ) == 0 )
{
dictionaryAuthor = wstring( str, authorMark.size(), str.size() - authorMark.size() );
currentField = &dictionaryAuthor;
}
else
if( str.compare( 0, descriptionMark.size(), descriptionMark ) == 0 )
{
dictionaryDecription = wstring( str, descriptionMark.size(), str.size() - descriptionMark.size() );
currentField = &dictionaryDecription;
}
else
if( str.compare( 0, langFromMark.size(), langFromMark ) == 0 )
{
langFrom = wstring( str, langFromMark.size(), str.size() - langFromMark.size() );
}
else
if( str.compare( 0, langToMark.size(), langToMark ) == 0 )
{
langTo = wstring( str, langToMark.size(), str.size() - langToMark.size() );
}
else
if( str.compare( 0, endOfHeaderMark.size(), endOfHeaderMark ) == 0 )
{
break;
}
}
else
{
/// Handle multiline headers
if( currentField )
*currentField += str;
}
}
}
bool GlsScanner::readNextLine( wstring & out, size_t & offset ) throw( Ex,
Iconv::Ex )
{
offset = (size_t)( gztell( f ) - readBufferLeft );
// For now we just read one char at a time
size_t readMultiple = ( encoding == Utf16LE || encoding == Utf16BE ) ? 2 : 1;
size_t leftInOut = wcharBuffer.size();
wchar * outPtr = &wcharBuffer.front();
for( ; ; )
{
// Check that we have bytes to read
if ( readBufferLeft < 4 ) // To convert one char, we need at most 4 bytes
{
if ( !gzeof( f ) )
{
// To avoid having to deal with ring logic, we move the remaining bytes
// to the beginning
memmove( readBuffer, readBufferPtr, readBufferLeft );
// Read some more bytes to readBuffer
int result = gzread( f, readBuffer + readBufferLeft,
sizeof( readBuffer ) - readBufferLeft );
if ( result == -1 )
throw exCantReadGlsFile();
readBufferPtr = readBuffer;
readBufferLeft += (size_t) result;
}
}
if ( readBufferLeft < readMultiple )
{
// No more data. Return what we've got so far, forget the last byte if
// it was a 16-bit Unicode and a file had an odd number of bytes.
readBufferLeft = 0;
if ( outPtr != &wcharBuffer.front() )
{
// If there was a stray \r, remove it
if ( outPtr[ -1 ] == L'\r' )
--outPtr;
out = wstring( &wcharBuffer.front(), outPtr - &wcharBuffer.front() );
++linesRead;
return true;
}
else
return false;
}
// Check that we have chars to write
if ( leftInOut < 2 ) // With 16-bit wchars, 2 is needed for a surrogate pair
{
wcharBuffer.resize( wcharBuffer.size() + 64 );
outPtr = &wcharBuffer.front() + wcharBuffer.size() - 64 - leftInOut;
leftInOut += 64;
}
// Ok, now convert one char
size_t outBytesLeft = sizeof( wchar );
Iconv::Result r =
iconv.convert( (void const *&)readBufferPtr, readBufferLeft,
(void *&)outPtr, outBytesLeft );
if ( r == Iconv::NeedMoreOut && outBytesLeft == sizeof( wchar ) )
{
// Seems to be a surrogate pair with a 16-bit target wchar
outBytesLeft *= 2;
r = iconv.convert( (void const *&)readBufferPtr, readBufferLeft,
(void *&)outPtr, outBytesLeft );
--leftInOut; // Complements the next decremention
}
if ( outBytesLeft )
throw exEncodingError();
--leftInOut;
// Have we got \n?
if ( outPtr[ -1 ] == L'\n' )
{
--outPtr;
// Now kill a \r if there is one, and return the result.
if ( outPtr != &wcharBuffer.front() && outPtr[ -1 ] == L'\r' )
--outPtr;
out = wstring( &wcharBuffer.front(), outPtr - &wcharBuffer.front() );
++linesRead;
return true;
}
}
}
GlsScanner::~GlsScanner() throw()
{
gzclose( f );
}
namespace {
////////////////// GLS Dictionary
DEF_EX_STR( exCantReadFile, "Can't read file", Dictionary::Ex )
DEF_EX( exUserAbort, "User abort", Dictionary::Ex )
DEF_EX_STR( exDictzipError, "DICTZIP error", Dictionary::Ex )
enum
{
Signature = 0x58534c47, // GLSX on little-endian, XSLG on big-endian
CurrentFormatVersion = 1 + BtreeIndexing::FormatVersion + Folding::Version,
CurrentZipSupportVersion = 2,
CurrentFtsIndexVersion = 1
};
struct IdxHeader
{
uint32_t signature; // First comes the signature, GLSX
uint32_t formatVersion; // File format version (CurrentFormatVersion)
uint32_t zipSupportVersion; // Zip support version -- narrows down reindexing
// when it changes only for dictionaries with the
// zip files
int glsEncoding; // Which encoding is used for the file indexed
uint32_t chunksOffset; // The offset to chunks' storage
uint32_t indexBtreeMaxElements; // Two fields from IndexInfo
uint32_t indexRootOffset;
uint32_t articleCount; // Number of articles this dictionary has
uint32_t wordCount; // Number of headwords this dictionary has
uint32_t langFrom; // Source language
uint32_t langTo; // Target language
uint32_t hasZipFile; // Non-zero means there's a zip file with resources
// present
uint32_t zipIndexBtreeMaxElements; // Two fields from IndexInfo of the zip
// resource index.
uint32_t zipIndexRootOffset;
}
#ifndef _MSC_VER
__attribute__((packed))
#endif
;
bool indexIsOldOrBad( string const & indexFile, bool hasZipFile )
{
File::Class idx( indexFile, "rb" );
IdxHeader header;
return idx.readRecords( &header, sizeof( header ), 1 ) != 1 ||
header.signature != Signature ||
header.formatVersion != CurrentFormatVersion ||
(bool) header.hasZipFile != hasZipFile ||
( hasZipFile && header.zipSupportVersion != CurrentZipSupportVersion );
}
class GlsDictionary: public BtreeIndexing::BtreeDictionary
{
Mutex idxMutex;
File::Class idx;
IdxHeader idxHeader;
dictData * dz;
ChunkedStorage::Reader chunks;
Mutex dzMutex;
Mutex resourceZipMutex;
IndexedZip resourceZip;
string dictionaryName;
public:
GlsDictionary( string const & id, string const & indexFile,
vector< string > const & dictionaryFiles );
~GlsDictionary();
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::WordSearchRequest > findHeadwordsForSynonym( wstring const & )
throw( std::exception );
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();
virtual QString getMainFilename();
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 );
virtual void makeFTSIndex(QAtomicInt & isCancelled, bool firstIteration );
virtual void setFTSParameters( Config::FullTextSearch const & fts )
{
can_FTS = fts.enabled
&& !fts.disabledTypes.contains( "GLS", Qt::CaseInsensitive )
&& ( fts.maxDictionarySize == 0 || getArticleCount() <= fts.maxDictionarySize );
}
protected:
void loadIcon() throw();
private:
/// Loads the article, storing its headword and formatting the data it has
/// into an html.
void loadArticle( uint32_t address,
string & headword,
string & articleText );
/// Loads the article
void loadArticleText( uint32_t address,
vector< string > & headwords,
string & articleText );
/// Process resource links (images, audios, etc)
QString & filterResource( QString & article );
friend class GlsResourceRequest;
friend class GlsArticleRequest;
friend class GlsHeadwordsRequest;
};
GlsDictionary::GlsDictionary( string const & id,
string const & indexFile,
vector< string > const & dictionaryFiles ):
BtreeDictionary( id, dictionaryFiles ),
idx( indexFile, "rb" ),
idxHeader( idx.read< IdxHeader >() ),
dz( 0 ),
chunks( idx, idxHeader.chunksOffset )
{
// Open the .gls file
DZ_ERRORS error;
dz = dict_data_open( getDictionaryFilenames()[ 0 ].c_str(), &error, 0 );
if ( !dz )
throw exDictzipError( string( dz_error_str( error ) )
+ "(" + getDictionaryFilenames()[ 0 ] + ")" );
// Read the dictionary name
idx.seek( sizeof( idxHeader ) );
vector< char > dName( idx.read< uint32_t >() );
idx.read( &dName.front(), dName.size() );
dictionaryName = string( &dName.front(), dName.size() );
// Initialize the index
openIndex( IndexInfo( idxHeader.indexBtreeMaxElements,
idxHeader.indexRootOffset ),
idx, idxMutex );
// Open a resource zip file, if there's one
if ( idxHeader.hasZipFile &&
( idxHeader.zipIndexBtreeMaxElements ||
idxHeader.zipIndexRootOffset ) )
{
resourceZip.openIndex( IndexInfo( idxHeader.zipIndexBtreeMaxElements,
idxHeader.zipIndexRootOffset ),
idx, idxMutex );
QString zipName = QDir::fromNativeSeparators(
FsEncoding::decode( getDictionaryFilenames().back().c_str() ) );
if ( zipName.endsWith( ".zip", Qt::CaseInsensitive ) ) // Sanity check
resourceZip.openZipFile( zipName );
}
// Full-text search parameters
can_FTS = true;
ftsIdxName = indexFile + "_FTS";
if( !Dictionary::needToRebuildIndex( dictionaryFiles, ftsIdxName )
&& !FtsHelpers::ftsIndexIsOldOrBad( ftsIdxName, this ) )
FTS_index_completed.ref();
}
GlsDictionary::~GlsDictionary()
{
if ( dz )
dict_data_close( dz );
}
void GlsDictionary::loadIcon() throw()
{
if ( dictionaryIconLoaded )
return;
QString fileName =
QDir::fromNativeSeparators( FsEncoding::decode( getDictionaryFilenames()[ 0 ].c_str() ) );
// Remove the extension
if ( fileName.endsWith( ".gls.dz", Qt::CaseInsensitive ) )
fileName.chop( 6 );
else
fileName.chop( 3 );
if ( !loadIconFromFile( fileName ) )
{
// Load failed -- use default icon
dictionaryNativeIcon = dictionaryIcon = QIcon(":/icons/icon32_gls.png");
}
dictionaryIconLoaded = true;
}
QString const& GlsDictionary::getDescription()
{
if( !dictionaryDescription.isEmpty() )
return dictionaryDescription;
try {
GlsScanner scanner( getDictionaryFilenames()[ 0 ] );
string str = Utf8::encode( scanner.getDictionaryAuthor() );
if( !str.empty() )
dictionaryDescription = QString( QObject::tr( "Author: %1%2" ) )
.arg( QString::fromUtf8( str.c_str() ) )
.arg( "\n\n" );
str = Utf8::encode( scanner.getDictionaryDescription() );
if( !str.empty() )
{
QString desc = QString::fromUtf8( str.c_str() );
desc.replace( "\t", "<br/>" );
desc.replace( "\\n", "<br/>" );
desc.replace( "<br>", "<br/>", Qt::CaseInsensitive );
dictionaryDescription += Html::unescape( desc, true );
}
}
catch( std::exception & e )
{
gdWarning( "GLS dictionary description reading failed: %s, error: %s\n",
getName().c_str(), e.what() );
}
if( dictionaryDescription.isEmpty() )
dictionaryDescription = "NONE";
return dictionaryDescription;
}
QString GlsDictionary::getMainFilename()
{
return FsEncoding::decode( getDictionaryFilenames()[ 0 ].c_str() );
}
void GlsDictionary::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 && getArticleCount() > FTS::MaxDictionarySizeForFastSearch )
return;
gdDebug( "Gls: Building the full-text index for dictionary: %s\n",
getName().c_str() );
try
{
FtsHelpers::makeFTSIndex( this, isCancelled );
FTS_index_completed.ref();
}
catch( std::exception &ex )
{
gdWarning( "Gls: Failed building full-text search index for \"%s\", reason: %s\n", getName().c_str(), ex.what() );
QFile::remove( FsEncoding::decode( ftsIdxName.c_str() ) );
}
}
void GlsDictionary::loadArticleText( uint32_t address,
vector< string > & headwords,
string & articleText )
{
vector< char > chunk;
char * articleProps;
{
Mutex::Lock _( idxMutex );
articleProps = chunks.getBlock( address, chunk );
}
uint32_t articleOffset, articleSize;
memcpy( &articleOffset, articleProps, sizeof( articleOffset ) );
memcpy( &articleSize, articleProps + sizeof( articleOffset ),
sizeof( articleSize ) );
char * articleBody;
{
Mutex::Lock _( dzMutex );
articleBody = dict_data_read_( dz, articleOffset, articleSize, 0, 0 );
}
headwords.clear();
articleText.clear();
string headword;
if ( !articleBody )
{
articleText = string( "\n\tDICTZIP error: " ) + dict_error_str( dz );
}
else
{
string articleData = Iconv::toUtf8( GlsScanner::getEncodingNameFor( Encoding( idxHeader.glsEncoding ) ), articleBody, articleSize );
string::size_type start_pos = 0, end_pos = 0;
for( ; ; )
{
// Replace all "\r\n" by "\n"
end_pos = articleData.find( "\r\n", start_pos );
if( end_pos == string::npos )
{
articleText += articleData.substr( start_pos, end_pos );
break;
}
else
{
articleText += articleData.substr( start_pos, end_pos - start_pos ) + "\n";
start_pos = end_pos + 2;
}
}
// Find headword
start_pos = articleText.find( '\n' );
if( start_pos != string::npos )
{
headword = articleText.substr( 0, start_pos );
articleText = articleText.substr( start_pos + 1, string::npos );
}
// Parse headwords
start_pos = 0;
end_pos = 0;
for( ; ; )
{
end_pos = headword.find( '|', start_pos );
if( end_pos == wstring::npos )
{
string hw = headword.substr( start_pos );
if( !hw.empty() )
headwords.push_back( hw );
break;
}
headwords.push_back( headword.substr( start_pos, end_pos - start_pos ) );
start_pos = end_pos + 1;
}
}
}
void GlsDictionary::loadArticle( uint32_t address,
string & headword,
string & articleText )
{
string articleBody;
vector< string > headwords;
loadArticleText( address, headwords, articleBody );
QString article = QString::fromLatin1( "<div class=\"glsdict\">" );
if( headwords.size() )
{
// Headwords
article += "<div class=\"glsdict_headwords\"";
if( isFromLanguageRTL() )
article += " dir=\"rtl\"";
if( headwords.size() > 1 )
{
QString altHeadwords;
for( vector< string >::size_type i = 1; i < headwords.size(); i++ )
{
if( i > 1 )
altHeadwords += ", ";
altHeadwords += QString::fromUtf8( headwords[ i ].c_str(), headwords[ i ].size() );
}
article += " title=\"" + altHeadwords + "\"";
}
article += ">";
headword = headwords.front();
article += QString::fromUtf8( headword.c_str(), headword.size() );
article += "</div>";
}
if( isToLanguageRTL() )
article += "<span dir=\"rtl\">";
QString text = QString::fromUtf8( articleBody.c_str(), articleBody.size() );
article += filterResource( text );
if( isToLanguageRTL() )
article += "</span>";
article +="</div>";
articleText = string( article.toUtf8().data() );
}
QString & GlsDictionary::filterResource( QString & article )
{
QRegExp imgRe( "(<\\s*img\\s+[^>]*src\\s*=\\s*[\"']+)(?!(?:data|https?|ftp):)", Qt::CaseInsensitive );
imgRe.setMinimal( true );
QRegExp linkRe( "(<\\s*link\\s+[^>]*href\\s*=\\s*[\"']+)(?!(?:data|https?|ftp):)", Qt::CaseInsensitive );
linkRe.setMinimal( true );
article.replace( imgRe , "\\1bres://" + QString::fromStdString( getId() ) + "/" )
.replace( linkRe, "\\1bres://" + QString::fromStdString( getId() ) + "/" );
// Handle links to articles
QRegExp linksReg( "<a(\\s*[^>]*)href\\s*=\\s*['\"](bword://)?([^'\"]+)['\"]" );
linksReg.setMinimal( true );
int pos = 0;
while( pos >= 0 )
{
pos = linksReg.indexIn( article, pos );
if( pos < 0 )
break;
QString link = linksReg.cap( 3 );
if( link.indexOf( ':' ) < 0 )
{
QString newLink;
if( link.indexOf( '#' ) < 0 )
newLink = QString( "<a" ) + linksReg.cap( 1 ) + "href=\"bword:" + link + "\"";
// Anchors
if( link.indexOf( '#' ) > 0 )
{
newLink = QString( "<a" ) + linksReg.cap( 1 ) + "href=\"gdlookup://localhost/" + link + "\"";
newLink.replace( "#", "?gdanchor=" );
}
if( !newLink.isEmpty() )
{
article.replace( pos, linksReg.cap( 0 ).size(), newLink );
pos += newLink.size();
}
else
pos += linksReg.cap( 0 ).size();
}
else
pos += linksReg.cap( 0 ).size();
}
return article;
}
void GlsDictionary::getArticleText( uint32_t articleAddress, QString & headword, QString & text )
{
try
{
vector< string > headwords;
string articleStr;
loadArticleText( articleAddress, headwords, articleStr );
if( !headwords.empty() )
headword = QString::fromUtf8( headwords.front().data(), headwords.front().size() );
wstring wstr = Utf8::decode( articleStr );
text = Html::unescape( gd::toQString( wstr ) );
}
catch( std::exception &ex )
{
gdWarning( "Gls: Failed retrieving article from \"%s\", reason: %s\n", getName().c_str(), ex.what() );
}
}
/// GlsDictionary::findHeadwordsForSynonym()
class GlsHeadwordsRequest;
class GlsHeadwordsRequestRunnable: public QRunnable
{
GlsHeadwordsRequest & r;
QSemaphore & hasExited;
public:
GlsHeadwordsRequestRunnable( GlsHeadwordsRequest & r_,
QSemaphore & hasExited_ ): r( r_ ),
hasExited( hasExited_ )
{}
~GlsHeadwordsRequestRunnable()
{
hasExited.release();
}
virtual void run();
};
class GlsHeadwordsRequest: public Dictionary::WordSearchRequest
{
friend class GlsHeadwordsRequestRunnable;
wstring word;
GlsDictionary & dict;
QAtomicInt isCancelled;
QSemaphore hasExited;
public:
GlsHeadwordsRequest( wstring const & word_, GlsDictionary & dict_ ):
word( word_ ), dict( dict_ )
{
QThreadPool::globalInstance()->start(
new GlsHeadwordsRequestRunnable( *this, hasExited ) );
}
void run(); // Run from another thread by StardictHeadwordsRequestRunnable
virtual void cancel()
{
isCancelled.ref();
}
~GlsHeadwordsRequest()
{
isCancelled.ref();
hasExited.acquire();
}
};
void GlsHeadwordsRequestRunnable::run()
{
r.run();
}
void GlsHeadwordsRequest::run()
{
if ( Qt4x5::AtomicInt::loadAcquire( isCancelled ) )
{
finish();
return;
}
try
{
vector< WordArticleLink > chain = dict.findArticles( word );
wstring caseFolded = Folding::applySimpleCaseOnly( word );
for( unsigned x = 0; x < chain.size(); ++x )
{
if ( Qt4x5::AtomicInt::loadAcquire( isCancelled ) )
{
finish();
return;
}
string articleText;
vector< string > headwords;
dict.loadArticleText( chain[ x ].articleOffset,
headwords, articleText );
wstring headwordDecoded = Utf8::decode( headwords.front() );
if ( caseFolded != Folding::applySimpleCaseOnly( headwordDecoded ) )
{
// The headword seems to differ from the input word, which makes the
// input word its synonym.
Mutex::Lock _( dataMutex );
matches.push_back( headwordDecoded );
}
}
}
catch( std::exception & e )
{
setErrorString( QString::fromUtf8( e.what() ) );
}
finish();
}
sptr< Dictionary::WordSearchRequest >
GlsDictionary::findHeadwordsForSynonym( wstring const & word )
throw( std::exception )
{
return synonymSearchEnabled ? new GlsHeadwordsRequest( word, *this ) :
Class::findHeadwordsForSynonym( word );
}