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##---------------------------------------------------------------------------##
## File:
## @(#) mhtxtenrich.pl 2.5 01/08/26 01:57:59
## Author:
## Earl Hood mhonarc@mhonarc.org
## Description:
## Library defines a routine for MHonArc to filter text/enriched
## data.
##
## Filter routine can be registered with the following:
##
## <MIMEFILTERS>
## text/enriched:m2h_text_enriched'filter:mhtxtenrich.pl
## text/richtext:m2h_text_enriched'filter:mhtxtenrich.pl
## </MIMEFILTERS>
##
##---------------------------------------------------------------------------##
## MHonArc -- Internet mail-to-HTML converter
## Copyright (C) 1997-2001 Earl Hood, mhonarc@mhonarc.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; if not, write to the Free Software
## Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA
## 02111-1307, USA
##---------------------------------------------------------------------------##
package m2h_text_enriched;
##---------------------------------------------------------------------------
## Filter routine.
##
sub filter {
my($fields, $data, $isdecode, $args) = @_;
my($innofill, $chunk, $ret, $charset);
$ret = "";
$args = "" unless defined($args);
$charset = "";
## Grab charset parameter (if defined)
$ctype = $fields->{'content-type'}[0] || "";
if ($ctype =~ /charset=(\S+)/) {
$charset = lc $1;
$charset =~ s/['"]//g;
}
## Convert specials
$$data =~ s|&|\&|gi;
$$data =~ s|<<|\<|gi;
## Translate text/enriched commands
$innofill = 0;
foreach $chunk (split(m|(</?nofill>)|i, $$data)) {
if ($chunk =~ m|<nofill>|i) {
$ret .= "<PRE>";
$innofill = 1;
next;
}
if ($chunk =~ m|</nofill>|i) {
$ret .= "</PRE>";
$innofill = 0;
next;
}
convert_tags(\$chunk);
if (!$innofill) {
$chunk =~ s|(\r?\n\s*)|&nl_seq_to_brs($1)|gie;
}
$ret .= $chunk;
}
## Translate 8-bit characters to entity refs based on charset
## (we already did '<' and '&' characters)
if ($charset =~ /iso-8859-([2-9]|10)/i) {
require 'iso8859.pl';
$ret = iso_8859::str2sgml($ret, $charset, 1);
}
$ret;
}
##---------------------------------------------------------------------------
## convert_tags translates text/enriched commands to HTML tags.
##
sub convert_tags {
my($str) = shift;
$$str =~ s|<(/?)bold>|<$1B>|gi;
$$str =~ s|<(/?)italic>|<$1I>|gi;
$$str =~ s|<(/?)underline>|<$1U>|gi;
$$str =~ s|<(/?)fixed>|<$1TT>|gi;
$$str =~ s|<(/?)smaller>|<$1SMALL>|gi;
$$str =~ s|<(/?)bigger>|<$1BIG>|gi;
$$str =~ s|<fontfamily>\s*<param>([^<]+)</param>|<FONT face="$1">|gi;
$$str =~ s|</fontfamily>|</FONT>|gi;
$$str =~ s|<color>\s*<param>\s*(\S+)\s*</param>|<FONT color="$1">|gi;
$$str =~ s|</color>|</FONT>|gi;
$$str =~ s|<center>|<P align="center">|gi;
$$str =~ s|</center>|</P>|gi;
$$str =~ s|<flushleft>|<P align="left">|gi;
$$str =~ s|</flushleft>|</P>|gi;
$$str =~ s|<flushright>|<P align="right">|gi;
$$str =~ s|</flushright>|</P>|gi;
$$str =~ s|<flushboth>|<P align="both">|gi; # Not supported in HTML
$$str =~ s|</flushboth>|</P>|gi;
$$str =~ s|<paraindent>\s*<param>([^<]*)</param>|<BLOCKQUOTE>|gi;
$$str =~ s|</paraindent>|</BLOCKQUOTE>|gi;
$$str =~ s|<excerpt>\s*(<param>([^<]*)</param>)?|<BLOCKQUOTE>|gi;
$$str =~ s|</excerpt>|</BLOCKQUOTE>|gi;
# Not supported commands
$$str =~ s|<lang>\s*<param>([^<]*)</param>||gi;
$$str =~ s|</lang>||gi;
}
##---------------------------------------------------------------------------
## nl_seq_to_brs returns a "<BR>" string based on the number
## on eols in a string.
##
sub nl_seq_to_brs {
my($str) = shift;
my($n);
$n = $str =~ tr/\n/\n/;
--$n;
if ($n <= 0) {
return " ";
} else {
return "<br>\n" x $n;
}
}
##---------------------------------------------------------------------------
## preserve_space returns a string with all spaces and tabs
## converted to nbsps.
##
sub preserve_space {
my($str) = shift;
1 while
$str =~ s/^([^\t]*)(\t+)/$1 . ' ' x (length($2) * 8 - length($1) % 8)/e;
$str =~ s/ /\ /g;
$str;
}
##---------------------------------------------------------------------------
1;
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