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Diffstat (limited to 'kopete/plugins/latex/latexplugin.cpp')
| -rw-r--r-- | kopete/plugins/latex/latexplugin.cpp | 259 |
1 files changed, 259 insertions, 0 deletions
diff --git a/kopete/plugins/latex/latexplugin.cpp b/kopete/plugins/latex/latexplugin.cpp new file mode 100644 index 00000000..7ceab209 --- /dev/null +++ b/kopete/plugins/latex/latexplugin.cpp @@ -0,0 +1,259 @@ +/* + Kopete Latex Plugin + + Copyright (c) 2004 by Duncan Mac-Vicar Prett <duncan@kde.org> + Copyright (c) 2004-2005 by Olivier Goffart <ogoffart@kde. org> + + Kopete (c) 2001-2004 by the Kopete developers <kopete-devel@kde.org> + + ************************************************************************* + * * + * This program is free software; you can redistribute it and/or modify * + * it under the terms of the GNU General Public License as published by * + * the Free Software Foundation; either version 2 of the License, or * + * (at your option) any later version. * + * * + ************************************************************************* +*/ + +#include <qregexp.h> +#include <qimage.h> +#include <qbuffer.h> +#include <qcstring.h> +#include <qstylesheet.h> +#include <kgenericfactory.h> +#include <kdebug.h> +#include <kstandarddirs.h> +#include <kprocess.h> +#include <ktempfile.h> +#include <kmdcodec.h> +#include <kmessagebox.h> + +#include "kopetechatsessionmanager.h" +#include "kopeteuiglobal.h" + +#include "latexplugin.h" +#include "latexconfig.h" +#include "latexguiclient.h" + +#define ENCODED_IMAGE_MODE 0 + +typedef KGenericFactory<LatexPlugin> LatexPluginFactory; +K_EXPORT_COMPONENT_FACTORY( kopete_latex, LatexPluginFactory( "kopete_latex" ) ) + +LatexPlugin::LatexPlugin( QObject *parent, const char *name, const QStringList &/*args*/ ) +: Kopete::Plugin( LatexPluginFactory::instance(), parent, name ) +{ +// kdDebug() << k_funcinfo << endl; + if( !s_pluginStatic ) + s_pluginStatic = this; + + mMagickNotFoundShown = false; + connect( Kopete::ChatSessionManager::self(), SIGNAL( aboutToDisplay( Kopete::Message & ) ), SLOT( slotMessageAboutToShow( Kopete::Message & ) ) ); + connect( Kopete::ChatSessionManager::self(), SIGNAL( aboutToSend(Kopete::Message& ) ), this, SLOT(slotMessageAboutToSend(Kopete::Message& ) ) ); + connect ( this , SIGNAL( settingsChanged() ) , this , SLOT( slotSettingsChanged() ) ); + connect( Kopete::ChatSessionManager::self(), SIGNAL( chatSessionCreated( Kopete::ChatSession * ) ), + this, SLOT( slotNewChatSession( Kopete::ChatSession * ) ) ); + + m_convScript = KStandardDirs::findExe("kopete_latexconvert.sh"); + slotSettingsChanged(); + + //Add GUI action to all already existing kmm (if the plugin is launched when kopete already rining) + QValueList<Kopete::ChatSession*> sessions = Kopete::ChatSessionManager::self()->sessions(); + for (QValueListIterator<Kopete::ChatSession*> it= sessions.begin(); it!=sessions.end() ; ++it) + slotNewChatSession( *it ); +} + +LatexPlugin::~LatexPlugin() +{ + s_pluginStatic = 0L; +} + +LatexPlugin* LatexPlugin::plugin() +{ + return s_pluginStatic ; +} + +LatexPlugin* LatexPlugin::s_pluginStatic = 0L; + +void LatexPlugin::slotNewChatSession( Kopete::ChatSession *KMM ) +{ + new LatexGUIClient( KMM ); +} + + +void LatexPlugin::slotMessageAboutToShow( Kopete::Message& msg ) +{ + QString mMagick = KStandardDirs::findExe("convert"); + if ( mMagick.isEmpty() ) + { + // show just once + if ( !mMagickNotFoundShown ) + { + KMessageBox::queuedMessageBox( + Kopete::UI::Global::mainWidget(), + 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.") + ); + mMagickNotFoundShown = true; + } + // dont try to parse if convert is not installed + return; + } + + QString messageText = msg.plainBody(); + if( !messageText.contains("$$")) + return; + + //kdDebug() << k_funcinfo << " Using converter: " << m_convScript << endl; + + // /\[([^]]).*?\[/$1\]/ + // \$\$.+?\$\$ + + // this searches for $$formula$$ + QRegExp rg("\\$\\$.+\\$\\$"); + rg.setMinimal(true); + // this searches for [latex]formula[/latex] + //QRegExp rg("\\[([^]\]).*?\\[/$1\\]"); + + int pos = 0; + + QMap<QString, QString> replaceMap; + while (pos >= 0 && (unsigned int)pos < messageText.length()) + { +// kdDebug() << k_funcinfo << " searching pos: " << pos << endl; + pos = rg.search(messageText, pos); + + if (pos >= 0 ) + { + QString match = rg.cap(0); + pos += rg.matchedLength(); + + QString formul=match; + if(!securityCheck(formul)) + continue; + + QString fileName=handleLatex(formul.replace("$$","")); + + // get the image and encode it with base64 + #if ENCODED_IMAGE_MODE + QImage renderedImage( fileName ); + imagePxWidth = renderedImage.width(); + imagePxHeight = renderedImage.height(); + if ( !renderedImage.isNull() ) + { + QByteArray ba; + QBuffer buffer( ba ); + buffer.open( IO_WriteOnly ); + renderedImage.save( &buffer, "PNG" ); + QString imageURL = QString::fromLatin1("data:image/png;base64,%1").arg( KCodecs::base64Encode( ba ) ); + replaceMap[match] = imageURL; + } + #else + replaceMap[match] = fileName; + #endif + } + } + + if(replaceMap.isEmpty()) //we haven't found any latex strings + return; + + messageText= msg.escapedBody(); + + int imagePxWidth,imagePxHeight; + for (QMap<QString,QString>::ConstIterator it = replaceMap.begin(); it != replaceMap.end(); ++it) + { + QImage theImage(*it); + if(theImage.isNull()) + continue; + imagePxWidth = theImage.width(); + imagePxHeight = theImage.height(); + QString escapedLATEX=QStyleSheet::escape(it.key()).replace("\"","""); //we need the escape quotes because that string will be in a title="" argument, but not the \n + messageText.replace(Kopete::Message::escape(it.key()), " <img width=\"" + QString::number(imagePxWidth) + "\" height=\"" + QString::number(imagePxHeight) + "\" src=\"" + (*it) + "\" alt=\"" + escapedLATEX +"\" title=\"" + escapedLATEX +"\" /> "); + } + + msg.setBody( messageText, Kopete::Message::RichText ); +} + + +void LatexPlugin::slotMessageAboutToSend( Kopete::Message& msg) +{ + Q_UNUSED(msg) + //disabled because to work correctly, we need to find what special has the gif we can send over MSN +#if 0 + KConfig *config = KGlobal::config(); + config->setGroup("Latex Plugin"); + + if(!config->readBoolEntry("ParseOutgoing", false)) + return; + + QString messageText = msg.plainBody(); + if( !messageText.contains("$$")) + return; +/* if( msg.from()->protocol()->pluginId()!="MSNProtocol" ) + return;*/ + + // this searches for $$formula$$ + QRegExp rg("^\\s*\\$\\$([^$]+)\\$\\$\\s*$"); + + if( rg.search(messageText) != -1 ) + { + QString latexFormula = rg.cap(1); + if(!securityCheck( latexFormula )) + return; + + QString url = handleLatex(latexFormula); + + + if(!url.isNull()) + { + QString escapedLATEX= QStyleSheet::escape(messageText).replace("\"","""); + QString messageText="<img src=\"" + url + "\" alt=\"" + escapedLATEX + "\" title=\"" + escapedLATEX +"\" />"; + msg.setBody( messageText, Kopete::Message::RichText ); + } + } +#endif +} + +QString LatexPlugin::handleLatex(const QString &latexFormula) +{ + KTempFile *tempFile=new KTempFile( locateLocal( "tmp", "kopetelatex-" ), ".png" ); + tempFile->setAutoDelete(true); + m_tempFiles.append(tempFile); + m_tempFiles.setAutoDelete(true); + QString fileName = tempFile->name(); + + KProcess p; + + QString argumentRes = "-r %1x%2"; + QString argumentOut = "-o %1"; + //QString argumentFormat = "-fgif"; //we uses gif format because MSN only handle gif + int hDPI, vDPI; + hDPI = LatexConfig::self()->horizontalDPI(); + vDPI = LatexConfig::self()->verticalDPI(); + p << m_convScript << argumentRes.arg(QString::number(hDPI), QString::number(vDPI)) << argumentOut.arg(fileName) /*<< argumentFormat*/ << latexFormula ; + + kdDebug() << k_funcinfo << " Rendering " << m_convScript << " " << argumentRes.arg(QString::number(hDPI), QString::number(vDPI)) << " " << argumentOut.arg(fileName) << endl; + + // FIXME our sucky sync filter API limitations :-) + p.start(KProcess::Block); + return fileName; +} + +bool LatexPlugin::securityCheck(const QString &latexFormula) +{ + return !latexFormula.contains(QRegExp("\\\\(def|let|futurelet|newcommand|renewcomment|else|fi|write|input|include" + "|chardef|catcode|makeatletter|noexpand|toksdef|every|errhelp|errorstopmode|scrollmode|nonstopmode|batchmode" + "|read|csname|newhelp|relax|afterground|afterassignment|expandafter|noexpand|special|command|loop|repeat|toks" + "|output|line|mathcode|name|item|section|mbox|DeclareRobustCommand)[^a-zA-Z]")); + +} + +void LatexPlugin::slotSettingsChanged() +{ + LatexConfig::self()->readConfig(); +} + +#include "latexplugin.moc" + +// vim: set noet ts=4 sts=4 sw=4: + |