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### File: html2.2.pl
### Language definitions for HTML 2.2 (Tables)
### Written by Marcus E. Hennecke <marcush@leland.stanford.edu>
### Version 0.4, February 2, 1996
## Revisions:
## TKM Tom Miller <tkm@eos.ncsu.edu>
## Copyright (C) 1995 by Marcus E. Hennecke
## 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., 675 Mass Ave, Cambridge, MA 02139, USA.
if ($HTML_OPTIONS =~ /table/) {
$DOCTYPE = '';
$STRICT_HTML = 0;
}
### The following routines do tables
$content_mark = "<cellcontents>";
## Since the do_env_tabular subroutine does all the work, there is
## nothing left to do.
#sub do_env_table {
# local($_) = @_;
# &get_next_optional_argument;
# $_ = &translate_commands(&translate_environments($_));
# $_;
#}
#sub do_env_tablestar {
# local($_) = @_;
# &get_next_optional_argument;
# $_ = &translate_commands(&translate_environments($_));
# $_;
#}
### Define the multicolumn command
# Modifies the $colspec and $colspan variables of the tabular subroutine
sub do_cmd_multicolumn {
local($_) = @_;
local($dmy1,$dmy2,$dmy3,$dmy4);
s/$next_pair_pr_rx//o;
$colspan = 0+$2;
$colspec =~ /^<([A-Z]+)/;
local($celltag) = $1;
s/$next_pair_pr_rx//o;
($dmy1,$dmy2,$dmy3,$dmy4,$colspec) = &translate_colspec($2, $celltag);
s/$next_pair_pr_rx//o;
$2;
}
# Since hlines are taken care of in the tabular environment, they
# don't need to do anything. Ideally, this routine should never be
# called anyway. clines are not yet supported.
sub do_cmd_hline {
$_[$[];
}
sub do_cmd_cline {
$_[$[] =~ s/$next_pair_pr_rx//o;
$_[$[];
}
# Attempts to convert latex lengths into some HTML equivalent. This
# can only be an attempt until browsers start implementing units.
# The returned values are: The length according to Netscape (in pixels
# or percent) and the length according to HTML 3.0.
sub convert_length {
local($_) = @_;
local(%scale) = ("in",72,"pt",72.27/72,"pc",12,"mm",72/25.4,"cm",72/2.54,"\\hsize",100);
local(%units) = ("in","in","pt","pt","pc","pi","mm","mm","cm","cm","\\hsize","%");
local($pxs,$len);
if ( /([0-9.]+)(in|pt|pc|mm|cm|\\hsize)/ ) {
$pxs = int($1 * $scale{$2} + 0.5);
$len = $1 . $units{$2};
if ( $2 eq "\\hsize" ) {
$pxs .= '\%';
};
};
($pxs,$len);
}
# Translates LaTeX column specifications to HTML. Again, Netscape
# needs some extra work with its width attributes in the <td> tags.
sub translate_colspec {
local($colspec,$celltag) = @_;
local($cellopen) = "<$celltag VALIGN=BASELINE ALIGN";
local($cellclose) = "</$celltag>";
local($htmlcolspec,$len,$pts,@colspec,$char,$cols,$repeat);
local($frames,$rules,$prefix);
$frames = "l" if ( $colspec =~ s/^\|+// );
$frames .= "r" if ( $colspec =~ s/\|+$// );
$rules = "c" if ( $colspec =~ /\|/ );
$htmlcolspec = "<COLGROUP>" if ( $rules );
$cols = 0;
while ( length($colspec) > 0 ) {
$char = substr($colspec,0,1);
$colspec = substr($colspec,1);
if ( $char eq "c" ) {
$htmlcolspec .= "<COL ALIGN=CENTER>";
push(@colspec,"$cellopen=CENTER NOWRAP>$content_mark$cellclose");
$cols++;
} elsif ( $char eq "l" ) {
$htmlcolspec .= "<COL ALIGN=LEFT>";
push(@colspec,"$cellopen=LEFT NOWRAP>$content_mark$cellclose");
$cols++;
} elsif ( $char eq "r" ) {
$htmlcolspec .= "<COL ALIGN=RIGHT>";
push(@colspec,"$cellopen=RIGHT NOWRAP>$content_mark$cellclose");
$cols++;
} elsif ( $char eq "p" ) {
$colspec =~ s/$next_pair_rx//;
($pts,$len) = &convert_length($2);
if ( $pts ) {
$width = " WIDTH=\"$pts\"";
$htmlcolspec .= "<COL ALIGN=JUSTIFY WIDTH=\"$len\">";
} else {
$width = "";
$htmlcolspec .= "<COL ALIGN=JUSTIFY>";
};
push(@colspec,"$cellopen=LEFT$width>$content_mark$cellclose");
$cols++;
} elsif ( $char eq "|" ) {
$htmlcolspec .= "<COLGROUP>";
} elsif ( $char eq "@" ) {
$htmlcolspec .= "<COL ALIGN=CENTER>";
$colspec =~ s/$next_pair_rx//;
$cols++;
if ( $#colspec < 0 ) {
$prefix .= "$cellopen=CENTER NOWRAP>" .
&translate_commands($2) . $cellclose;
} else {
$colspec[$#colspec] .= "$cellopen=CENTER NOWRAP>" .
&translate_commands($2) . $cellclose;
}
} elsif ( $char eq "*" ) {
$colspec =~ s/$next_pair_rx//;
$repeat = $2;
$colspec =~ s/$next_pair_rx//;
$colspec = "$2"x$repeat . $colspec;
};
};
$colspec[0] = $prefix . $colspec[0];
($htmlcolspec,$frames,$rules,$cols,@colspec);
}
%frameoptions = ( "l", "LHS", "r", "RHS", "lr", "VSIDES",
"t", "ABOVE", "b", "BELOW", "tb", "HSIDES",
"lt", "BOX", "rt", "BOX", "lrt", "BOX",
"lb", "BOX", "rb", "BOX", "lrb", "BOX",
"ltb", "BOX", "rtb", "BOX", "lrtb", "BOX");
# tabularstar simply calls tabular but with an extra argument---the
# width.
sub do_env_tabularstar {
local($_) = @_;
s/$next_pair_rx//;
local($pts,$len) = &convert_length($2);
&do_env_tabular($_," width=$pts");
}
sub do_env_tabular {
local($_) = @_;
&get_next_optional_argument;
s/$next_pair_rx//;
local($colspec) = $2;
s/\\\\\s*\[([^]]+)\]/\\\\/g; # TKM - get rid of [N.n pc] on end of rows...
s/\\newline\s*\[([^]]+)\]/\\newline/g;
s/\n\s*\n/\n/g; # Remove empty lines (otherwise will have paragraphs!)
local($i,@colspec,$char,$cols,$cell,$htmlcolspec,$frames,$rules);
local(@rows,@cols,$border);
local($colspan,$cellcount);
$border = ""; $frame = "";
($htmlcolspec,$frames,$rules,$cols,@colspec) =
&translate_colspec($colspec, 'TD');
$frames .= "t" if ( s/^\s*\\hline// );
$frames .= "b" if ( s/\\hline\s*$// );
$rules .= "r" if ( /\\[ch]line/ );
if ( $frames || $rules ) {
$border = " BORDER";
$rule = " RULES=NONE";
$frame = " FRAME=$frameoptions{$frames}" if ($frames);
$rule = " RULES=GROUPS" if ($rules);
};
@rows = split(/\\\\/);
$#rows-- if ( $rows[$#rows] =~ /^\s*$/ );
local($return) = "<TABLE COLS=$cols$border$frame$rule$_[1]>\n";
$return .= "$htmlcolspec\n";
$return .= "<TBODY>\n" if ( $rules =~ /r/ );
foreach (@rows) {
if ( s/^(\s*\\hline\s*)+//g ) {
$return .= "</TBODY><TBODY>\n";
};
$return .= "<TR>";
@cols = split(/$html_specials{'&'}/o);
for ( $i = 0; $i <= $#colspec; $i++ ) {
$colspec = $colspec[$i];
$colspan = 0;
# May modify $colspec
$cell = &translate_commands(&translate_environments(shift(@cols)));
if ( $colspan ) {
for ( $cellcount = 0; $colspan > 0; $colspan-- ) {
$colspec[$i++] =~ s/<TD/$cellcount++;"<TD"/ge;
}
$i--;
$colspec =~ s/>$content_mark/ COLSPAN=$cellcount$&/;
};
$colspec =~ s/$content_mark/$cell/;
$return .= $colspec;
};
$return .= "</TR>\n";
};
$return .= "</TBODY>\n" if ( $rules =~ /r/ );
if ($capenv && $captions) {
$return .= "<CAPTION ALIGN=BOTTOM>$captions</CAPTION>";
$captions = "";
}
$return .= "</TABLE>\n";
$return;
}
1;
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