Copy the KDE 3.5 branch to branches/trinity for new KDE 3.5 features.

BUG:215923


git-svn-id: svn://anonsvn.kde.org/home/kde/branches/trinity/kdenetwork@1054174 283d02a7-25f6-0310-bc7c-ecb5cbfe19da

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("$$",""));
+			
+			// get the image and encode it with base64
+			#if ENCODED_IMAGE_MODE
+			QImage renderedImage( fileName );
+			imagePxWidth = renderedImage.width();
+			imagePxHeight = renderedImage.height();
+			if ( !renderedImage.isNull() )
+			{
+				QByteArray ba;
+				QBuffer buffer( ba );
+				buffer.open( IO_WriteOnly );
+				renderedImage.save( &buffer, "PNG" );
+				QString imageURL = QString::fromLatin1("data:image/png;base64,%1").arg( KCodecs::base64Encode( ba ) );
+				replaceMap[match] = imageURL;
+			}
+			#else
+			replaceMap[match] = fileName;
+			#endif
+		}
+	}
+
+	if(replaceMap.isEmpty()) //we haven't found any latex strings
+		return;
+
+	messageText= msg.escapedBody();
+
+	int imagePxWidth,imagePxHeight;
+	for (QMap<QString,QString>::ConstIterator it = replaceMap.begin(); it != replaceMap.end(); ++it)
+	{
+		QImage theImage(*it);
+		if(theImage.isNull())
+			continue;
+		imagePxWidth = theImage.width();
+		imagePxHeight = theImage.height();
+		QString escapedLATEX=QStyleSheet::escape(it.key()).replace("\"","&quot;");  //we need  the escape quotes because that string will be in a title="" argument, but not the \n
+		messageText.replace(Kopete::Message::escape(it.key()), " <img width=\"" + QString::number(imagePxWidth) + "\" height=\"" + QString::number(imagePxHeight) + "\" src=\"" + (*it) + "\"  alt=\"" + escapedLATEX +"\" title=\"" + escapedLATEX +"\"  /> ");
+	}
+
+	msg.setBody( messageText, Kopete::Message::RichText );
+}
+
+
+void LatexPlugin::slotMessageAboutToSend( Kopete::Message& msg)
+{
+	Q_UNUSED(msg)
+	//disabled because to work correctly, we need to find what special has the gif we can send over MSN
+#if 0
+	KConfig *config = KGlobal::config();
+	config->setGroup("Latex Plugin");
+
+	if(!config->readBoolEntry("ParseOutgoing", false))
+		return;
+
+	QString messageText = msg.plainBody();
+	if( !messageText.contains("$$"))
+		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("\"","&quot;");
+			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:
+