#!/usr/bin/perl -w
#
# Copyright (c) 2002 SuSE Linux AG, Nuernberg, Germany.  All rights reserved.
#
# Author: Mike Fabian <mfabian@suse.de>, 2002
#

use English;
use Getopt::Long;

# check if we are started as root
# only one of UID and USER must be set correctly

if ($UID != 0 && $ENV{USER} !~ /root/) {
    print "You must be root to start $0\n";
    exit 1;
}

if (system ("rpm -q freetype-tools >/dev/null 2>&1") != 0) {
  print "freetype-tools package missing, exiting.\n";
  exit 1;
}


sub usage {
  print "Usage: cjk-latex-config [--verbose|v] [--force|f] [--type1|t]\n";
  exit 1;
}

# Process command line options
my %opt;
unless (GetOptions(\%opt,
		   'verbose|v', \$OPT_VERBOSE,
		   'force|f',   \$OPT_FORCE,
		   'type1|t',   \$OPT_TYPE1,
		  )) {
  &usage();
  exit 1;
}

# to make sure ttf2tfm finds the .sdf files:
system("texhash");

$tfm_created = 0;
$type1_created = 0;

system("mkdir -p /usr/share/texmf/fonts/truetype/");

open (TTFONTS_MAP, "/etc/ttf2pk/ttfonts.map");

while (<TTFONTS_MAP>) {
  
  chomp($ARG);
  
  if ($ARG =~ /\@[a-zA-Z0-9\/]+\@/) {

    if($OPT_VERBOSE) {
      print "----------------------------------------------------------------------\n";
      print "$ARG\n";
    }
    
    @fields = split(/\s+/, $ARG);
    
    $tt_dir = "/usr/X11R6/lib/X11/fonts/truetype/";
    $tt_basename = $fields[1];
    
    if ($fields[0] =~ /([^\s]+)\@[a-zA-Z0-9\/]+\@/) {
      $latex_font_name = $1;
    } else {
      print "can't find latex font name.\n";
      exit 1
    }
    
    if ($fields[0] =~ /\@([a-zA-Z0-9\/]+)\@/) {
      $sfd_name = $1;
      $sfd_name =~ /.*\/([a-zA-Z0-9]+)/;
      $sfd_basename = $1;
    } else {
      print "can't find sfd_name.\n";
      exit 1
    }

    if ($ARG =~ /Pid=([0-9]+)/) {
      $pid = "$1";
    } else {
      $pid = "3";
    }

    if ($ARG =~ /Eid=([0-9]+)/) {
      $eid = "$1";
    } else {
      $eid = "1";
    }

    if ($ARG =~ /Slant=([0-9.]+)/) {
      $slant = $1;
      $slant_opt = "-s $1";
    } else {
      $slant = 0;
      $slant_opt = "-s 0";
    }

    if ($ARG =~ /Rotate=(Yes)/) {
      $rotate = 1;
      $rotate_opt = "-x";
    } else {
      $rotate = 0;
      $rotate_opt = "";
    }

    if (-e "$tt_dir/$tt_basename") {
      symlink("$tt_dir/$tt_basename",
	      "/usr/share/texmf/fonts/truetype/$tt_basename");
      $tfm_dir = "/usr/share/texmf/fonts/tfm/cjk-latex/";
      $type1_dir = "/usr/share/texmf/fonts/type1/cjk-latex/";

      if (0 != create_or_update_tfm ()) {
	print "creating .tfm failed.\n";
      }
      if ($OPT_TYPE1 && $slant == 0 && $rotate == 0) {
	if (0 != create_or_update_type1 ()) {
	  print "creating type1 font failed.\n";
	}
      }
    }
  }
}

if ($type1_created) {
  $command = "cjk-latex-t1mapgen $type1_dir";
  if (0 != system ($command)) {
    print "$command failed.\n";
    exit 1;
  }
}

if ($tfm_created || $type1_created) {
  system("texhash");
}


exit 0;


######################################################################

sub create_or_update_tfm {
  
  if ($OPT_FORCE ||
      mtime_differs_or_missing ("$tt_dir/$tt_basename",
				"$tfm_dir/$sfd_basename/$latex_font_name/")) {
      
    if (0 != system ("mkdir -p $tfm_dir/$sfd_basename/$latex_font_name/")) {
      print "mkdir -p $tfm_dir/$sfd_basename/$latex_font_name/ failed.\n";
      exit 1;
    }
    if (! chdir ("$tfm_dir/$sfd_basename/$latex_font_name/")) {
      print "can't chdir to $tfm_dir/$sfd_basename/$latex_font_name/\n";
      exit 1;
    }
    
    $command = "ttf2tfm $tt_dir/$tt_basename ";
    unless ($OPT_VERBOSE) {
      $command .= " -q"; 
    }
    $command .= " -P $pid -E $eid $rotate_opt $slant_opt $latex_font_name\@$sfd_name\@";
    if ($OPT_VERBOSE) {
      print "$command\n";
    } else {
      $command .= " > /dev/null 2>&1";
      print "$latex_font_name\@$sfd_name\@: calling ttf2tfm ...\n";
    }
    if (0 != system($command)) {
      print "$command failed.\n";
      return 1;
    }

    # success, mark this by giving the created directory the same time stamp
    # as the TT-font:
    system("touch -r $tt_dir/$tt_basename $tfm_dir/$sfd_basename/$latex_font_name/");
    $tfm_created = 1;
    return 0; 
  }
  
}

######################################################################

sub create_or_update_type1 {

  if ($OPT_FORCE ||
      mtime_differs_or_missing ("$tt_dir/$tt_basename",
				"$type1_dir/$sfd_basename/$latex_font_name/")) {
      
    if (0 != system ("mkdir -p $type1_dir/$sfd_basename/$latex_font_name/")) {
      print "mkdir -p $type1_dir/$sfd_basename/$latex_font_name/ failed.\n";
      exit 1;
    }
    if (! chdir ("$type1_dir/$sfd_basename/$latex_font_name/")) {
      print "can't chdir to $type1_dir/$sfd_basename/$latex_font_name/\n";
      exit 1;
    }

    if (grep(/$tt_basename/,("wadalab-gothic.ttf","watanabe-mincho.ttf"))) {
      print "$tt_basename does not work with ttf2pt1, skipping ...\n";
      return 0;
    }
    
    # disable smoothing of outlines for broken fonts
    # (for details see 'man ttf2pt1'):
    my $smoothing_opt = " ";
    if (grep(/$tt_basename/,("kochi-gothic.ttf"))) {
      print "$tt_basename broken, disabling smoothing of outlines.\n";
      $smoothing_opt = " -O s ";
    } 
    
    $sfd_file = "/usr/share/texmf/ttf2tfm/$sfd_basename.sfd";
    $map_file = `mktemp /tmp/cjk-latex-config-map.XXXXXX`;
    chomp $map_file;
    if ($map_file eq "") {
      print "mktemp /tmp/cjk-latex-config-map.XXXXXX failed.\n";
    }
    
    @planes = sfd2map($sfd_file,$map_file);
    if ($#planes == -1) {
      print "sfd2map($sfd_file,$map_file) failed.\n";
      return 1;
    }
    
    for my $plane (@planes) {
      if ($OPT_VERBOSE) {
	$command = "ttf2pt1 -W 99 ";
      } else {
	$command = "ttf2pt1 -W 0 ";
      }
      $command .= $smoothing_opt;
      $command .= " -p ft -b -G a -m h=5000 ";
      $command .= " -L $map_file+pid=$pid,eid=$eid,$plane ";
      $command .= " $tt_dir/$tt_basename $latex_font_name$plane";
      if ($OPT_VERBOSE) {
	print "$command\n";
      } else {
	$command .= " > /dev/null 2>&1";
	print "$latex_font_name\@$sfd_name\@, plane=$plane: calling ttf2pt1 ...\n";
      }
      if (0 != system($command)) {
	print "$command failed.\n";
	return 1;
      }      
    }

    unlink $map_file;
    
    # success, mark this by giving the created directory the same time stamp
    # as the TT-font:
    system("touch -r $tt_dir/$tt_basename $type1_dir/$sfd_basename/$latex_font_name/");
    $type1_created = 1;
    return 0;
  }
}

######################################################################

sub sfd2map {
  my($sfd_file,$map_file) = @_;
  if (! open (SFD, "<$sfd_file")) {
    print "cannot open $sfd_file\n";
    return ();
  }
  if (! open (MAP, ">$map_file")) {
    print "cannot open $map_file\n";
    close (SFD);
    return ();
  }

  my(@planes) = ();

  while (<SFD>) {
  
    if ( ! ($ARG =~ /^[[:space:]]*\#/)) {  # skip comment lines

      # handle plane numbers:
      if ( $ARG =~ /^([[:xdigit:]]{2})[[:space:]]*/ ) {
	$ARG =~ s/^([[:xdigit:]]{2})[[:space:]]*/   /;
	print MAP "plane $1\n";
	print MAP "at 0x00\n";
	$planes[$#planes + 1] = $1;
      }
    
      # remove continuation chars '\':
      $ARG =~ s/\\$//;
    
      $ARG =~ s/(0x[[:xdigit:]]{1,4})/$1,/g;
      # handle ranges like 0xF800_0xF8FF
      $ARG =~ s/(0x[[:xdigit:]]{1,4}),_/$1-/g;
    }

    print MAP $ARG;

  }

  close (MAP);
  close (SFD);
  return @planes;
}


# Returns true if the modification time of $f1 differs from
# the modification time of $f2 
sub mtime_differs {
  my($f1,$f2) = @_;
  if( -e $f1 && -e $f2) {
    local (@f1s) = stat ($f1);
    local (@f2s) = stat ($f2);
    return ($f1s[9] != $f2s[9]);
  } else {
    return 0;
  }
}

# Returns true if the modification time of $f1 differs from
# the modification time of $f2 or if one of the files is missing
sub mtime_differs_or_missing {
    my($f1,$f2) = @_;
    if (! -e $f1 || ! -e $f2 || mtime_differs($f1,$f2)) {
      return 1;
    } else {
      return 0;
    }
}  

# Returns true if $f1 is newer than $f2
sub newer {
  my($f1,$f2) = @_;
  if( -e $f1 && -e $f2) {
    local (@f1s) = stat ($f1);
    local (@f2s) = stat ($f2);
    return ($f1s[9] > $f2s[9]);
  } else {
    return 0;
  }
}

# Returns true if $f1 is newer than $f2 or if one of the files is missing
sub newer_or_missing {
    my($f1,$f2) = @_;
    if (! -e $f1 || ! -e $f2 || newer($f1,$f2)) {
      return 1;
    } else {
      return 0;
    }
}