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|
# -*- perl -*-
#
# $Id: alltt.perl,v 1.20 1999/11/25 10:20:25 RRM Exp $
#
# alltt.perl by Herbert Swan <dprhws.edp.Arco.com> 12-22-95
#
# Extension to LaTeX2HTML V 96.1 to supply support for the
# "alltt" standard LaTeX2e package.
#
# revised for v99.1 by Ross Moore <ross@maths.mq.edu.au>
#
# Change Log:
# ===========
# $Log: alltt.perl,v $
# Revision 1.20 1999/11/25 10:20:25 RRM
# -- protect " characters from becoming active; e.g. with german, etc.
# thanks to Peter Junglas for reporting the bug
#
# Revision 1.19 1999/10/22 00:35:44 RRM
# -- undef is a scalar operator --- thanks Achim.Haertel
#
# Revision 1.18 1999/09/14 22:02:02 MRO
#
# -- numerous cleanups, no new features
#
# Revision 1.17 1999/06/06 14:25:01 MRO
#
#
# -- many cleanups wrt. to TeXlive
# -- changed $* to /m as far as possible. $* is deprecated in perl5, all
# occurrences should be removed.
#
# Revision 1.16 1999/06/03 05:00:54 RRM
# -- extensive revision, to support styles, with correct nesting of tags
# -- retain space after macro-names
# -- support $USING_STYLES for stylesheets
#
package main;
# allow users to declare their own alltt-like environments
if ($alltt_rx) {
$alltt_rx = 'alltt'."|$alltt_rx";
$alltt_rx =~ s/\|{2,}/\|/g; $alltt_rx =~ s/\|$//g;
} else {
$alltt_rx = 'alltt'
}
sub preprocess_alltt {
local ($before, $after, $alltt, $alltt_env);
local ($alltt_begin) = "<alltt_begin>";
local ($alltt_end) = "<alltt_end>";
local($saveRS) = $/; undef $/;
while (/\\begin\s*{($alltt_rx)}([ \t]*\n)?/m) {
$alltt_env = $1;
$alltt = "";
($before, $after) = ($`, $');
if ($after =~ /\\end\s*{($alltt_rx)}/sm) {
($alltt, $after) = ($`, $');
local(@check) = split("\n",$before);
local($lastline) = pop @check unless ($before =~ s/\n$//sm);
$alltt = &alltt_helper($alltt) # shield special chars
unless ($lastline =~ /(^|[^\\])(\\\\)*%.*$/m); # unless commented out
undef @check; undef $lastline;
}
$_ = join('', $before, "\n", $alltt_begin, "{$alltt_env}\n"
, $alltt, $alltt_end, "{$alltt_env}", $after);
}
$/ = $saveRS;
s/$alltt_begin\{([^\}]*)\}/\\begin{$1}/gosm;
s/$alltt_end\{([^\}]*)\}/\\end{$1}/gosm;
}
sub alltt_helper {
local ($_) = @_;
local($br_id) = ++$global{'max_id'};
s/^/\\relax$O$br_id$C$O$br_id$C /s; # Preserve leading & trailing white space
s/\t/ /g; # Remove tabs
# preserve space after macro names
s/(\\\w+) /$br_id=++$global{'max_id'};$1."$O$br_id$C$O$br_id$C "/eg;
s/\\?\$/;SPMdollar;/g;
s/\\?%/;SPMpct;/g;
# protect " from being used as an active character with some languages
s/((^|[^\\])(\\\\)*)(\"|\;SPMquot\;)/$1\"/gm;
s/~/;SPMtilde;/g;
s/\n/\n<BR>/g; # preserve end-of-lines --- cannot have <P>s
join('', $_, "\\relax ");
}
#RRM, 29-4-99:
# The {alltt} environment is always aligned-left
# but it may inherit color & other styles from surrounding environments.
sub do_env_alltt {
local ($_) = @_;
local($closures,$reopens,$alltt_start,$alltt_end,@open_block_tags);
if ($HTML_VERSION > 3.0) {
if ($USING_STYLES) {
$env_id .= ' CLASS="alltt"' unless ($env_id =~/CLASS=/);
$env_style{'alltt'} = " " unless ($env_style{'alltt'});
}
$alltt_start = "\n<DIV$env_id ALIGN=\"LEFT\">\n";
$alltt_end = "\n</DIV>\n";
$env_id = '';
} else {
$alltt_start = "<P ALIGN=\"LEFT\">";
$alltt_end = "</P>";
}
# get the tag-strings for all open tags
local(@keep_open_tags) = @$open_tags_R;
($closures,$reopens) = &preserve_open_tags() if (@$open_tags_R);
# get the tags for text-level tags only
$open_tags_R = [ @keep_open_tags ];
local($local_closures, $local_reopens);
($local_closures, $local_reopens,@open_block_tags) = &preserve_open_block_tags
if (@$open_tags_R);
$open_tags_R = [ @open_block_tags ];
do {
local($open_tags_R) = [ @open_block_tags ];
local(@save_open_tags) = ();
local($cnt) = ++$global{'max_id'};
$_ = join('',"$O$cnt$C\\tt$O", ++$global{'max_id'}, $C
, $_ , $O, $global{'max_id'}, "$C$O$cnt$C");
$_ = &translate_environments($_);
$_ = &translate_commands($_) if (/\\/);
# preserve space-runs, using
while (s/(\S) ( +)/$1$2;SPMnbsp;/g){};
s/(<BR>) /$1;SPMnbsp;/g;
#RRM: using <PRE> tags doesn't allow images, etc.
# $_ = &revert_to_raw_tex($_);
# &mark_string; # ???
# s/\\([{}])/$1/g; # ???
# s/<\/?\w+>//g; # no nested tags allowed
# join('', $closures,"<PRE$env_id>$_</PRE>", $reopens);
# s/<P>//g;
# join('', $closures,"<PRE$env_id>", $_, &balance_tags(), '</PRE>', $reopens);
$_ = join('', $closures, $alltt_start , $local_reopens
, $_
, &balance_tags() #, $local_closures
, $alltt_end, $reopens);
undef $open_tags_R; undef @save_open_tags;
};
$open_tags_R = [ @keep_open_tags ];
$_;
}
1; # Must be last line
|
