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260 lines
8.3 KiB
260 lines
8.3 KiB
15 years ago
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/*
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Kopete Latex Plugin
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Copyright (c) 2004 by Duncan Mac-Vicar Prett <duncan@kde.org>
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Copyright (c) 2004-2005 by Olivier Goffart <ogoffart@kde. org>
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Kopete (c) 2001-2004 by the Kopete developers <kopete-devel@kde.org>
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*************************************************************************
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* *
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* This program is free software; you can redistribute it and/or modify *
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* it under the terms of the GNU General Public License as published by *
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* the Free Software Foundation; either version 2 of the License, or *
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* (at your option) any later version. *
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* *
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*************************************************************************
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*/
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#include <qregexp.h>
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#include <qimage.h>
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#include <qbuffer.h>
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#include <qcstring.h>
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#include <qstylesheet.h>
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#include <kgenericfactory.h>
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#include <kdebug.h>
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#include <kstandarddirs.h>
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#include <kprocess.h>
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#include <ktempfile.h>
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#include <kmdcodec.h>
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#include <kmessagebox.h>
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#include "kopetechatsessionmanager.h"
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#include "kopeteuiglobal.h"
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#include "latexplugin.h"
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#include "latexconfig.h"
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#include "latexguiclient.h"
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#define ENCODED_IMAGE_MODE 0
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typedef KGenericFactory<LatexPlugin> LatexPluginFactory;
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K_EXPORT_COMPONENT_FACTORY( kopete_latex, LatexPluginFactory( "kopete_latex" ) )
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LatexPlugin::LatexPlugin( QObject *parent, const char *name, const QStringList &/*args*/ )
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: Kopete::Plugin( LatexPluginFactory::instance(), parent, name )
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{
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// kdDebug() << k_funcinfo << endl;
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if( !s_pluginStatic )
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s_pluginStatic = this;
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mMagickNotFoundShown = false;
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connect( Kopete::ChatSessionManager::self(), SIGNAL( aboutToDisplay( Kopete::Message & ) ), SLOT( slotMessageAboutToShow( Kopete::Message & ) ) );
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connect( Kopete::ChatSessionManager::self(), SIGNAL( aboutToSend(Kopete::Message& ) ), this, SLOT(slotMessageAboutToSend(Kopete::Message& ) ) );
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connect ( this , SIGNAL( settingsChanged() ) , this , SLOT( slotSettingsChanged() ) );
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connect( Kopete::ChatSessionManager::self(), SIGNAL( chatSessionCreated( Kopete::ChatSession * ) ),
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this, SLOT( slotNewChatSession( Kopete::ChatSession * ) ) );
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m_convScript = KStandardDirs::findExe("kopete_latexconvert.sh");
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slotSettingsChanged();
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//Add GUI action to all already existing kmm (if the plugin is launched when kopete already rining)
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QValueList<Kopete::ChatSession*> sessions = Kopete::ChatSessionManager::self()->sessions();
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for (QValueListIterator<Kopete::ChatSession*> it= sessions.begin(); it!=sessions.end() ; ++it)
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slotNewChatSession( *it );
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}
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LatexPlugin::~LatexPlugin()
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{
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s_pluginStatic = 0L;
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}
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LatexPlugin* LatexPlugin::plugin()
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{
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return s_pluginStatic ;
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}
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LatexPlugin* LatexPlugin::s_pluginStatic = 0L;
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void LatexPlugin::slotNewChatSession( Kopete::ChatSession *KMM )
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{
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new LatexGUIClient( KMM );
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}
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void LatexPlugin::slotMessageAboutToShow( Kopete::Message& msg )
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{
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QString mMagick = KStandardDirs::findExe("convert");
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if ( mMagick.isEmpty() )
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{
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// show just once
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if ( !mMagickNotFoundShown )
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{
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KMessageBox::queuedMessageBox(
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Kopete::UI::Global::mainWidget(),
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KMessageBox::Error, i18n("I cannot find the Magick convert program.\nconvert is required to render the Latex formulas.\nPlease go to www.imagemagick.org or to your distribution site and get the right package.")
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);
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mMagickNotFoundShown = true;
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}
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// dont try to parse if convert is not installed
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return;
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}
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QString messageText = msg.plainBody();
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if( !messageText.contains("$$"))
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return;
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//kdDebug() << k_funcinfo << " Using converter: " << m_convScript << endl;
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// /\[([^]]).*?\[/$1\]/
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// \$\$.+?\$\$
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// this searches for $$formula$$
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QRegExp rg("\\$\\$.+\\$\\$");
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rg.setMinimal(true);
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// this searches for [latex]formula[/latex]
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//QRegExp rg("\\[([^]\]).*?\\[/$1\\]");
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int pos = 0;
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QMap<QString, QString> replaceMap;
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while (pos >= 0 && (unsigned int)pos < messageText.length())
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{
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// kdDebug() << k_funcinfo << " searching pos: " << pos << endl;
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pos = rg.search(messageText, pos);
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if (pos >= 0 )
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{
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QString match = rg.cap(0);
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pos += rg.matchedLength();
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QString formul=match;
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if(!securityCheck(formul))
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continue;
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QString fileName=handleLatex(formul.replace("$$",""));
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// get the image and encode it with base64
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#if ENCODED_IMAGE_MODE
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QImage renderedImage( fileName );
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imagePxWidth = renderedImage.width();
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imagePxHeight = renderedImage.height();
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if ( !renderedImage.isNull() )
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{
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QByteArray ba;
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QBuffer buffer( ba );
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buffer.open( IO_WriteOnly );
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renderedImage.save( &buffer, "PNG" );
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QString imageURL = QString::fromLatin1("data:image/png;base64,%1").arg( KCodecs::base64Encode( ba ) );
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replaceMap[match] = imageURL;
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}
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#else
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replaceMap[match] = fileName;
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#endif
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}
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}
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if(replaceMap.isEmpty()) //we haven't found any latex strings
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return;
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messageText= msg.escapedBody();
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int imagePxWidth,imagePxHeight;
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for (QMap<QString,QString>::ConstIterator it = replaceMap.begin(); it != replaceMap.end(); ++it)
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{
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QImage theImage(*it);
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if(theImage.isNull())
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continue;
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imagePxWidth = theImage.width();
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imagePxHeight = theImage.height();
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QString escapedLATEX=QStyleSheet::escape(it.key()).replace("\"","""); //we need the escape quotes because that string will be in a title="" argument, but not the \n
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messageText.replace(Kopete::Message::escape(it.key()), " <img width=\"" + QString::number(imagePxWidth) + "\" height=\"" + QString::number(imagePxHeight) + "\" src=\"" + (*it) + "\" alt=\"" + escapedLATEX +"\" title=\"" + escapedLATEX +"\" /> ");
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}
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msg.setBody( messageText, Kopete::Message::RichText );
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}
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void LatexPlugin::slotMessageAboutToSend( Kopete::Message& msg)
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{
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Q_UNUSED(msg)
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//disabled because to work correctly, we need to find what special has the gif we can send over MSN
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#if 0
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KConfig *config = KGlobal::config();
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config->setGroup("Latex Plugin");
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if(!config->readBoolEntry("ParseOutgoing", false))
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return;
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QString messageText = msg.plainBody();
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if( !messageText.contains("$$"))
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return;
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/* if( msg.from()->protocol()->pluginId()!="MSNProtocol" )
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return;*/
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// this searches for $$formula$$
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QRegExp rg("^\\s*\\$\\$([^$]+)\\$\\$\\s*$");
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if( rg.search(messageText) != -1 )
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{
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QString latexFormula = rg.cap(1);
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if(!securityCheck( latexFormula ))
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return;
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QString url = handleLatex(latexFormula);
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if(!url.isNull())
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{
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QString escapedLATEX= QStyleSheet::escape(messageText).replace("\"",""");
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QString messageText="<img src=\"" + url + "\" alt=\"" + escapedLATEX + "\" title=\"" + escapedLATEX +"\" />";
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msg.setBody( messageText, Kopete::Message::RichText );
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}
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}
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#endif
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}
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QString LatexPlugin::handleLatex(const QString &latexFormula)
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{
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KTempFile *tempFile=new KTempFile( locateLocal( "tmp", "kopetelatex-" ), ".png" );
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tempFile->setAutoDelete(true);
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m_tempFiles.append(tempFile);
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m_tempFiles.setAutoDelete(true);
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QString fileName = tempFile->name();
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KProcess p;
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QString argumentRes = "-r %1x%2";
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QString argumentOut = "-o %1";
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//QString argumentFormat = "-fgif"; //we uses gif format because MSN only handle gif
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int hDPI, vDPI;
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hDPI = LatexConfig::self()->horizontalDPI();
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vDPI = LatexConfig::self()->verticalDPI();
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p << m_convScript << argumentRes.arg(QString::number(hDPI), QString::number(vDPI)) << argumentOut.arg(fileName) /*<< argumentFormat*/ << latexFormula ;
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kdDebug() << k_funcinfo << " Rendering " << m_convScript << " " << argumentRes.arg(QString::number(hDPI), QString::number(vDPI)) << " " << argumentOut.arg(fileName) << endl;
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// FIXME our sucky sync filter API limitations :-)
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p.start(KProcess::Block);
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return fileName;
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}
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bool LatexPlugin::securityCheck(const QString &latexFormula)
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{
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return !latexFormula.contains(QRegExp("\\\\(def|let|futurelet|newcommand|renewcomment|else|fi|write|input|include"
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"|chardef|catcode|makeatletter|noexpand|toksdef|every|errhelp|errorstopmode|scrollmode|nonstopmode|batchmode"
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"|read|csname|newhelp|relax|afterground|afterassignment|expandafter|noexpand|special|command|loop|repeat|toks"
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"|output|line|mathcode|name|item|section|mbox|DeclareRobustCommand)[^a-zA-Z]"));
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}
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void LatexPlugin::slotSettingsChanged()
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{
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LatexConfig::self()->readConfig();
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}
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#include "latexplugin.moc"
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// vim: set noet ts=4 sts=4 sw=4:
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