/*
    Klat - A LaTeX editor for KDE
    
    Copyright (C) 2002-2004  Jori Liesenborgs (jori@lumumba.luc.ac.be)

    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.

    This program is distributed in the hope that it will be useful,
    but WITHOUT ANY WARRANTY; without even the implied warranty of
    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
    GNU General Public License for more details.

    You should have received a copy of the GNU General Public License
    along with this program; if not, write to the Free Software
    Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
*/

#include "klatoutputtab.h"
#include "klatoutputtab.moc"
#include <keditcl.h>
#include <kprocess.h>
#include <stdlib.h>
#include <kmenubar.h>

KlatOutputTab::KlatOutputTab(QWidget *parent) : QTabWidget(parent)
{
	out = new KEdit(this);
	err = new KEdit(this);
	out->setReadOnly(true);
	err->setReadOnly(true);
	addTab(out,"Stdout");
	addTab(err,"Stderr");
	currentpid = 0;
}

KlatOutputTab::~KlatOutputTab()
{
}

void KlatOutputTab::newProcess(pid_t newpid,const QString &cmd)
{
	out->clear();
	err->clear();

	QString cmdinfo = "Executing the following command line:\n";
	
	cmdinfo += cmd;
	cmdinfo += "\n\n";
	addTextToEditWidget(out,cmdinfo.latin1(),cmdinfo.length());
	addTextToEditWidget(err,cmdinfo.latin1(),cmdinfo.length());

	currentpid = newpid;
}

#define BUFSIZE							1024

void KlatOutputTab::slotAddStdout(KProcess *proc,char *buffer,int buflen)
{
	if (proc->pid() != currentpid)
		return;
	addTextToEditWidget(out,buffer,buflen);
}

void KlatOutputTab::slotAddStderr(KProcess *proc,char *buffer,int buflen)
{
	if (proc->pid() != currentpid)
		return;
	addTextToEditWidget(err,buffer,buflen);
}

void KlatOutputTab::addTextToEditWidget(KEdit *w,const char *buffer,int buflen)
{
	int len,remaining,pos;
	int line,col;
	char tmp[BUFSIZE];
	QString text;

	remaining = buflen;
	pos = 0;
	line = 0;
	while (remaining > 0)
	{
		if (remaining > (BUFSIZE-1))
			len = BUFSIZE-1;
		else
			len = remaining;
		
		memcpy(tmp,buffer+pos,len);
		tmp[len] = 0;
		
		pos += len;
		remaining -= len;
		
		QString linestr;
		
		line = w->numLines()-1;
		linestr = w->textLine(line);
		col = linestr.length();
		
		w->insertAt(tmp,line,col);
		line = w->numLines()-1;
	}
	w->setCursorPosition(line,0);
}

void KlatOutputTab::finishedProcess(pid_t procpid)
{
	if (procpid != currentpid)
		return;
	
	QString info = "\nProcess finished\n";
	
	addTextToEditWidget(out,info.latin1(),info.length());
	addTextToEditWidget(err,info.latin1(),info.length());
}