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/*
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:
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