#!/usr/bin/perl

# autolatex - gnuplot2pstex
# Copyright (C) 1998-07  Stephane Galland <galland@arakhne.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.
#
# 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; see the file COPYING.  If not, write to
# the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
# Boston, MA 02111-1307, USA.

use strict;

use Cwd;
use File::Temp;
use File::Copy;
use File::Spec;
use File::Basename;

my $INPUTFILE = $ARGV[0];
my $OUTPUTFILE = $ARGV[1];

my $inputdir = dirname("$INPUTFILE");
if (!File::Spec->file_name_is_absolute("$inputdir")) {
	$inputdir = File::Spec->rel2abs("$inputdir");
}

my $outputdir = dirname("$OUTPUTFILE");
if (!File::Spec->file_name_is_absolute("$outputdir")) {
	$outputdir = File::Spec->rel2abs("$outputdir");
}

my $base = basename("$OUTPUTFILE");
$base =~ s/\.pstex_t$//;
$base =~ s/\.pstex$//;

my $TMPFILE = File::Temp::tempnam("$inputdir","${base}_").".plot";
my $TEXFILE = File::Spec->catfile("$outputdir","$base.tex");
my $PSFILE = File::Spec->catfile(dirname("$OUTPUTFILE"),"$base.ps");
my $PDFFILE = File::Spec->catfile(dirname("$OUTPUTFILE"),"$base.pdf");

local *OF;
local *IF;

open(*OF,"> $TMPFILE") or die("output $TMPFILE: $!\n");
open(*IF,"< $INPUTFILE") or die("input $INPUTFILE: $!\n");

print OF "set terminal pstex auxfile color\n";
print OF "set output \"$TEXFILE\"\n\n";

while (my $line = <IF>) {
  if ($line !~ /^\s*quit\s*$/) {
    print OF "$line";
  }
}

print OF "unset output\n";
print OF "quit\n";

close(*IF);
close(*OF);

my $retvalue = 0;

my @CMD = ("gnuplot",
	   basename("$TMPFILE"),
	   );
my $origdir = getcwd();
chdir("$inputdir") or die("$inputdir: $!\n");
system(@CMD);
$retvalue = $?;
chdir("$origdir") or die("$origdir: $!\n");
if ($retvalue==0) {

	open(*OF,"> $TMPFILE") or die("output $TMPFILE: $!\n");
	open(*IF,"< $TEXFILE") or die("input $TEXFILE: $!\n");

	print OF "\\begin{picture}(0,0)%\n";
	print OF "\\includegraphics{$PDFFILE}%\n";
	print OF "\\end{picture}%\n";

	my @lines = <IF>;
	my $content = join('',@lines);
	$content =~ s/\\special\s*\{.*?\}\s*//sg;

	print OF "$content";

	close(*IF);
	close(*OF);
}
else {
	print STDERR "Error when calling gnuplot\n";
	$retvalue = 1;
}

unlink("$TEXFILE");

move("$TMPFILE",File::Spec->catfile("$outputdir","$base.pstex_t"))
	or die("$TMPFILE: $!\n");
move("$PSFILE",File::Spec->catfile("$outputdir","$base.pstex"))
	or die("$PSFILE: $!\n");

unlink "$TMPFILE";

exit($retvalue);