Doc/myformat.perl

# myformat.perl by Guido van Rossum <guido@cwi.nl> 25 Jan 1994	-*- perl -*-
#
# Extension to LaTeX2HTML for documents using myformat.sty.
# Subroutines of the form do_cmd_<name> here define translations
# for LaTeX commands \<name> defined in the corresponding .sty file.
#
# XXX Not complete: \indexii etc.; \funcitem etc.

package main;

# \bcode and \ecode brackets around verbatim

sub do_cmd_bcode{ @_[0]; }
sub do_cmd_ecode{ @_[0]; }

# words typeset in a special way (not in HTML though)

sub do_cmd_ABC{ join('', 'ABC', @_[0]); }
sub do_cmd_UNIX{ join('', 'Unix', @_[0]); }
sub do_cmd_ASCII{ join('', 'ASCII', @_[0]); }
sub do_cmd_POSIX{ join('', 'POSIX', @_[0]); }
sub do_cmd_C{ join('', 'C', @_[0]); }
sub do_cmd_Cpp{ join('', 'C++', @_[0]); }
sub do_cmd_EOF{ join('', 'EOF', @_[0]); }
sub do_cmd_NULL{ join('', '<tt>NULL</tt>', @_[0]); }

sub do_cmd_e{ local($_) = @_; '&#92;' . $_; }

sub do_cmd_optional{
    local($_) = @_;
    s/$any_next_pair_pr_rx/<\/var><big>\[<\/big><var>\2<\/var><big>\]<\/big><var>/;
    $_;
}

sub do_cmd_varvars{
    local($_) = @_;
    s/$any_next_pair_pr_rx/<var>\2<\/var>/;
    $_;
}

# texinfo-like formatting commands: \code{...} etc.

sub do_cmd_code{
    local($_) = @_;
    s/$any_next_pair_pr_rx/<tt>\2<\/tt>/;
    $_;
}

sub do_cmd_sectcode{ &do_cmd_code(@_); }
sub do_cmd_module{ &do_cmd_code(@_); }
sub do_cmd_keyword{ &do_cmd_code(@_); }
sub do_cmd_exception{ &do_cmd_code(@_); }
sub do_cmd_class{ &do_cmd_code(@_); }
sub do_cmd_function{ &do_cmd_code(@_); }
sub do_cmd_cfunction{ &do_cmd_code(@_); }
sub do_cmd_constant{ &do_cmd_code(@_); }
sub do_cmd_method{ &do_cmd_code(@_); }
sub do_cmd_email{ &do_cmd_code(@_); }
sub do_cmd_program{ &do_cmd_code(@_); }

sub do_cmd_url{
    # use the URL as both text and hyperlink
    local($_) = @_;
    s/$any_next_pair_pr_rx/<tt><a href="\2">\2<\/a><\/tt>/;
    $_;
}

sub do_cmd_manpage{
    # two parameters:  \manpage{name}{section}
    local($_) = @_;
    local($any_next_pair_pr_rx3) = "$OP(\\d+)$CP([\\s\\S]*)$OP\\3$CP";
    s/$next_pair_pr_rx$any_next_pair_pr_rx3/<em>\2<\/em>(\4)/;
    $_;
}

sub do_cmd_rfc{
    local($_) = @_;
    s/$next_pair_pr_rx//;
    local($br_id,$rfcnumber) = ($1, $2);

    # Save the reference
    local($nstr) = &gen_index_id("RFC!RFC $rfcnumber", '');
    $index{$nstr} .= &make_half_href("$CURRENT_FILE#$br_id");
    "<a name=\"$br_id\">RFC $rfcnumber<\/a>" .$_;
}

sub do_cmd_kbd{
    local($_) = @_;
    s/$any_next_pair_pr_rx/<kbd>\2<\/kbd>/;
    $_;
}

sub do_cmd_key{
    local($_) = @_;
    s/$any_next_pair_pr_rx/<tt>\2<\/tt>/;
    $_;
}

sub do_cmd_var{
    local($_) = @_;
    s/$any_next_pair_pr_rx/<em>\2<\/em>/;
    $_;
}

sub do_cmd_dfn{
    local($_) = @_;
    s/$any_next_pair_pr_rx/<i><dfn>\2<\/dfn><\/i>/;
    $_;
}

sub do_cmd_emph{
    local($_) = @_;
    s/$any_next_pair_pr_rx/<em>\2<\/em>/;
    $_;
}

sub do_cmd_strong{
    local($_) = @_;
    s/$any_next_pair_pr_rx/<b>\2<\/b>/;
    $_;
}

# file and samp are at the end of this file since they screw up fontlock.

# index commands

$INDEX_SUBITEM = "";

sub do_cmd_setindexsubitem{
    local($_) = @_;
    s/$any_next_pair_pr_rx//;
    $INDEX_SUBITEM = $2;
    $_;
}

sub do_cmd_indexii{
    local($_) = @_;
    s/$next_pair_pr_rx//o;
    local($br_id1, $str1) = ($1, $2);
    s/$next_pair_pr_rx//o;
    local($br_id2, $str2) = ($1, $2);
    join('', &make_index_entry($br_id1, "$str1 $str2"),
	 &make_index_entry($br_id2, "$str2, $str1"), $_);
}

sub do_cmd_indexiii{
    local($_) = @_;
    s/$next_pair_pr_rx//o;
    local($br_id1, $str1) = ($1, $2);
    s/$next_pair_pr_rx//o;
    local($br_id2, $str2) = ($1, $2);
    s/$next_pair_pr_rx//o;
    local($br_id3, $str3) = ($1, $2);
    join('', &make_index_entry($br_id1, "$str1 $str2 $str3"),
	 &make_index_entry($br_id2, "$str2 $str3, $str1"),
	 &make_index_entry($br_id3, "$str3, $str1 $str2"),
	 $_);
}

sub do_cmd_indexiv{
    local($_) = @_;
    s/$next_pair_pr_rx//o;
    local($br_id1, $str1) = ($1, $2);
    s/$next_pair_pr_rx//o;
    local($br_id2, $str2) = ($1, $2);
    s/$next_pair_pr_rx//o;
    local($br_id3, $str3) = ($1, $2);
    s/$next_pair_pr_rx//o;
    local($br_id4, $str4) = ($1, $2);
    join('', &make_index_entry($br_id1, "$str1 $str2 $str3 $str4"),
	 &make_index_entry($br_id2, "$str2 $str3 $str4, $str1"),
	 &make_index_entry($br_id3, "$str3 $str4, $str1 $str2"),
	 &make_index_entry($br_id4, "$str4, $str1 $str2 $str3"),
	 $_);
}

sub do_cmd_ttindex{ &do_cmd_index(@_); }

sub my_typed_index_helper{
    local($word, $_) = @_;
    s/$next_pair_pr_rx//o;
    local($br_id, $str) = ($1, $2);
    join('', &make_index_entry($br_id, "$str $word"),
	 &make_index_entry($br_id, "$word, $str"), $_);
}

sub do_cmd_stindex{ &my_typed_index_helper('statement', @_); }
sub do_cmd_opindex{ &my_typed_index_helper('operator', @_); }
sub do_cmd_exindex{ &my_typed_index_helper('exception', @_); }
sub do_cmd_obindex{ &my_typed_index_helper('object', @_); }

sub my_parword_index_helper{
    local($word, $_) = @_;
    s/$next_pair_pr_rx//o;
    local($br_id, $str) = ($1, $2);
    &make_index_entry($br_id, "$str ($word)") . $_;
}


# Set this to true to strip out the <tt>...</tt> from index entries;
# this is analogous to using the second definition of \idxcode{} from
# myformat.sty.
#
# It is used from &make_mod_index_entry() and &make_str_index_entry().
#
$STRIP_INDEX_TT = 0;

sub make_mod_index_entry{
    local($br_id,$str,$define) = @_;
    local($halfref) = &make_half_href("$CURRENT_FILE#$br_id");
    # If TITLE is not yet available (i.e the \index command is in the title
    # of the current section), use $ref_before.
    $TITLE = $ref_before unless $TITLE;
    # Save the reference
    if ($define eq "DEF") {
	local($nstr,$garbage) = split / /, $str, 2;
	$Modules{$nstr} .= $halfref;
    }
    $str = &gen_index_id($str, $define);
    if ($STRIP_INDEX_TT) {
        $str =~ s/<tt>(.*)<\/tt>/\1/;
    }
    $index{$str} .= $halfref;
    "<a name=\"$br_id\">$anchor_invisible_mark<\/a>";
}

sub my_module_index_helper{
    local($word, $_, $define) = @_;
    s/$next_pair_pr_rx//o;
    local($br_id, $str) = ($1, $2);
    &make_mod_index_entry($br_id, "<tt>$str</tt> ($word module)",
			  $define) . $_;
}

sub do_cmd_bifuncindex{ &my_parword_index_helper('built-in function', @_); }
sub do_cmd_bimodindex{ &my_module_index_helper('built-in', @_, 'DEF'); }
sub do_cmd_stmodindex{ &my_module_index_helper('standard', @_, 'DEF'); }

sub do_cmd_refbimodindex{ &my_module_index_helper('built-in', @_, 'REF'); }
sub do_cmd_refstmodindex{ &my_module_index_helper('standard', @_, 'REF'); }

sub do_cmd_nodename{ &do_cmd_label(@_); }

sub init_myformat{
    # XXX need some way for this to be called after &initialise;
    # <<2>>...<<2>>
    $any_next_pair_rx3 = "$O(\\d+)$C([\\s\\S]*)$O\\3$C";
    $any_next_pair_rx5 = "$O(\\d+)$C([\\s\\S]*)$O\\5$C";
    $any_next_pair_rx7 = "$O(\\d+)$C([\\s\\S]*)$O\\7$C";
    $any_next_pair_rx9 = "$O(\\d+)$C([\\s\\S]*)$O\\9$C";
    # <#2#>...<#2#>
    $any_next_pair_pr_rx_3 = "$OP(\\d+)$CP([\\s\\S]*)$OP\\3$CP";
    $any_next_pair_pr_rx_5 = "$OP(\\d+)$CP([\\s\\S]*)$OP\\5$CP";
    $any_next_pair_pr_rx_7 = "$OP(\\d+)$CP([\\s\\S]*)$OP\\7$CP";
    $any_next_pair_pr_rx_9 = "$OP(\\d+)$CP([\\s\\S]*)$OP\\9$CP";
}

&init_myformat;

sub get_indexsubitem{
  local($result) = $INDEX_SUBITEM;
  #print "\nget_indexsubitem ==> $result\n";
  $result ? " $result" : '';
}

# similar to make_index_entry(), but includes the string in the result
# instead of the dummy filler.
#
sub make_str_index_entry{
    local($br_id,$str) = @_;
    # If TITLE is not yet available (i.e the \index command is in the title
    # of the current section), use $ref_before.
    $TITLE = $ref_before unless $TITLE;
    # Save the reference
    local($nstr) = &gen_index_id($str, '');
    if ($STRIP_INDEX_TT) {
        $nstr =~ s/<tt>(.*)<\/tt>/\1/;
    }
    $index{$nstr} .= &make_half_href("$CURRENT_FILE#$br_id");
    "<a name=\"$br_id\">$str<\/a>";
}

# Changed from the stock version to indent {verbatim} sections:
sub replace_verbatim {
    # Modifies $_
    s/$verbatim_mark(verbatim)(\d+)/<dl><dd><pre>$verbatim{$2}<\/pre><\/dl>/go;
    s/$verbatim_mark(rawhtml)(\d+)/$verbatim{$2}/ego;	# Raw HTML
}

sub do_env_cfuncdesc{
    local($_) = @_;
    local($return_type,$function_name,$arg_list,$idx) = ('', '', '', '');
    local($cfuncdesc_rx) =
      "$next_pair_rx$any_next_pair_rx3$any_next_pair_rx5";
    if (/$cfuncdesc_rx/o) {
	$return_type = "$2";
	$function_name = "$4";
	$arg_list = "$6";
	$idx = &make_str_index_entry($3,
			"<tt>$function_name</tt>" . &get_indexsubitem);
	$idx =~ s/ \(.*\)//;
    }
    "<dl><dt>$return_type <b>$idx</b>"
      . "(<var>$arg_list</var>)\n<dd>$'\n</dl>"
}

sub do_env_ctypedesc{
    local($_) = @_;
    local($type_name) = ('');
    local($cfuncdesc_rx) = "$next_pair_rx";
    if (/$cfuncdesc_rx/o) {
	$type_name = "$2";
	$idx = &make_str_index_entry($1,
			"<tt>$type_name</tt>" . &get_indexsubitem);
	$idx =~ s/ \(.*\)//;
    }
    "<dl><dt><b>$idx</b>\n<dd>$'\n</dl>"
}

sub do_env_cvardesc{
    local($_) = @_;
    local($var_type,$var_name,$idx) = ('', '', '');
    local($cfuncdesc_rx) = "$next_pair_rx$any_next_pair_rx3";
    if (/$cfuncdesc_rx/o) {
	$var_type = "$2";
	$var_name = "$4";
	$idx = &make_str_index_entry($3,
			"<tt>$var_name</tt>" . &get_indexsubitem);
	$idx =~ s/ \(.*\)//;
    }
    "<dl><dt>$var_type <b>$idx</b>\n"
      . "<dd>$'\n</dl>";
}

sub do_env_funcdesc{
    local($_) = @_;
    local($function_name,$arg_list,$idx) = ('', '', '');
    local($funcdesc_rx) = "$next_pair_rx$any_next_pair_rx3";
    if (/$funcdesc_rx/o) {
	$function_name = "$2";
	$arg_list = "$4";
	$idx = &make_str_index_entry($3,
			"<tt>$function_name</tt>" . &get_indexsubitem);
	$idx =~ s/ \(.*\)//;
    }
    "<dl><dt><b>$idx</b> (<var>$arg_list</var>)\n<dd>$'\n</dl>";
}

sub do_env_funcdescni{
    local($_) = @_;
    local($function_name,$arg_list,$idx) = ('', '', '');
    local($funcdesc_rx) = "$next_pair_rx$any_next_pair_rx3";
    if (/$funcdesc_rx/o) {
	$function_name = "$2";
	$arg_list = "$4";
	if ($STRIP_INDEX_TT) {
	    $idx = $function_name; }
	else {
	    $idx = "<tt>$function_name</tt>"; }
    }
    "<dl><dt><b>$idx</b> (<var>$arg_list</var>)\n<dd>$'\n</dl>";
}

sub do_cmd_funcline{
    local($_) = @_;
    local($funcdesc_rx) = "$next_pair_pr_rx$OP(\\d+)$CP([\\s\\S]*)$OP\\3$CP";

    s/$funcdesc_rx//o;
    local($br_id, $function_name, $arg_list) = ($3, $2, $4);
    local($idx) = &make_str_index_entry($br_id, "<tt>$function_name</tt>");

    "<dt><b>$idx</b> (<var>$arg_list</var>)\n<dd>" . $_;
}

# Change this flag to index the opcode entries.  I don't think it's very
# useful to index them, since they're only presented to describe the dis
# module.
#
$INDEX_OPCODES = 0;

sub do_env_opcodedesc{
    local($_) = @_;
    local($opcode_name,$arg_list,$stuff,$idx) = ('', '', '', '');
    local($opcodedesc_rx) = "$next_pair_rx$any_next_pair_rx3";
    if (/$opcodedesc_rx/o) {
	$opcode_name = "$2";
	$arg_list = "$4";
	if ($INDEX_OPCODES) {
	    $idx = &make_str_index_entry($3,
			"<tt>$opcode_name</tt> (byte code instruction)");
	    $idx =~ s/ \(byte code instruction\)//;
	}
	else {
	    $idx = "<tt>$opcode_name</tt>";
	}
      }
    $stuff = "<dl><dt><b>$idx</b>";
    if ($arg_list) {
	$stuff .= "&nbsp;&nbsp;&nbsp;&nbsp;<var>$arg_list</var>";
    }
    $stuff . "\n<dd>$'\n</dl>";
}

sub do_env_datadesc{
    local($_) = @_;
    local($idx) = '';
    if (/$next_pair_rx/o) {
	$idx = &make_str_index_entry($1, "<tt>$2</tt>" . &get_indexsubitem);
	$idx =~ s/ \(.*\)//;
    }
    "<dl><dt><b>$idx</b>\n<dd>$'\n</dl>"
}

sub do_env_datadescni{
    local($_) = @_;
    local($idx) = '';
    if (/$next_pair_rx/o) {
	if ($STRING_INDEX_TT) {
	    $idx = "$2"; }
	else {
	    $idx = "<tt>$2</tt>"; }
    }
    "<dl><dt><b>$idx</b>\n<dd>$'\n</dl>"
}

sub do_cmd_dataline{
    local($_) = @_;

    s/$next_pair_pr_rx//o;
    local($br_id, $data_name) = ($1, $2);
    local($idx) = &make_str_index_entry($br_id, "<tt>$data_name</tt>"
				       . &get_indexsubitem);
    $idx =~ s/ \(.*\)//;

    "<dt><b>$idx</b>\n<dd>" . $_;
}

sub do_env_excdesc{ &do_env_datadesc(@_); }
sub do_env_codesample{ &do_env_verbatim(@_); }


@col_aligns = ("<td>", "<td>", "<td>");

sub setup_column_alignments{
    local($_) = @_;
    local($j1,$a1,$a2,$a3,$j4) = split(/[|]/,$_);
    local($th1,$th2,$th3) = ('<th>', '<th>', '<th>');
    $col_aligns[0] = (($a1 eq "c") ? "<td align=center>" : "<td>");
    $col_aligns[1] = (($a2 eq "c") ? "<td align=center>" : "<td>");
    $col_aligns[2] = (($a3 eq "c") ? "<td align=center>" : "<td>");
    # return the aligned header start tags; only used for \begin{tableiii?}
    $th1 = (($a1 eq "l") ? "<th align=left>"
	    : ($a1 eq "r" ? "<th align=right>" : "<th>"));
    $th2 = (($a2 eq "l") ? "<th align=left>"
	    : ($a2 eq "r" ? "<th align=right>" : "<th>"));
    $th3 = (($a3 eq "l") ? "<th align=left>"
	    : ($a3 eq "r" ? "<th align=right>" : "<th>"));
    ($th1, $th2, $th3);
}

sub do_env_tableii{
    local($_) = @_;
    local($font,$h1,$h2) = ('', '', '');
    local($tableiii_rx) =
      "$next_pair_rx$any_next_pair_rx3$any_next_pair_rx5$any_next_pair_rx7";
    if (/$tableiii_rx/o) {
	$font = $4;
	$h1 = $6;
	$h2 = $8;
    }
    local($th1,$th2,$th3) = &setup_column_alignments($2);
    $globals{"lineifont"} = $font;
    "<table border align=center>\n  <tr>$th1$h1</th>\n      $th2$h2</th>$'\n"
      . "</table>";
}

sub do_cmd_lineii{
    local($_) = @_;
    s/$next_pair_pr_rx//o;
    local($c1) = $2;
    s/$next_pair_pr_rx//o;
    local($c2) = $2;
    local($font) = $globals{"lineifont"};
    local($c1align, $c2align) = @col_aligns[0,1];
    "<tr>$c1align<$font>$c1</$font></td>\n"
      . "      $c2align$c2</td>$'";
}

sub do_env_tableiii{
    local($_) = @_;
    local($font,$h1,$h2,$h3) = ('', '', '', '');
  
    local($tableiii_rx) =
      "$next_pair_rx$any_next_pair_rx3$any_next_pair_rx5$any_next_pair_rx7"
	. "$any_next_pair_rx9";
    if (/$tableiii_rx/o) {
	$font = $4;
	$h1 = $6;
	$h2 = $8;
	$h3 = $10;
    }
    local($th1,$th2,$th3) = &setup_column_alignments($2);
    $globals{"lineifont"} = $font;
    "<table border align=center>\n  <tr>$th1$h1</th>\n      $th2$h2</th>"
      . "\n      $th3$h3</th>$'\n"
      . "</table>";
}

sub do_cmd_lineiii{
    local($_) = @_;
    s/$next_pair_pr_rx//o;
    local($c1) = $2;
    s/$next_pair_pr_rx//o;
    local($c2) = $2;
    s/$next_pair_pr_rx//o;
    local($c3) = $2;
    local($font) = $globals{"lineifont"};
    local($c1align, $c2align, $c3align) = @col_aligns;
    "<tr>$c1align<$font>$c1</$font></td>\n"
      . "      $c2align$c2</td>\n"
      . "      $c3align$c3</td>$'";
}

sub do_env_seealso{
    "<p><b>See Also:</b></p>\n" . @_[0];
}

sub do_cmd_seemodule{
    local($_) = @_;
    local($any_next_pair_pr_rx3) = "$OP(\\d+)$CP([\\s\\S]*)$OP\\3$CP";
    s/$next_pair_pr_rx$any_next_pair_pr_rx3/<p><tt><b>\2<\/b><\/tt> (\4)<\/p>/;
    $_;
}

sub do_cmd_seetext{
    "<p>" . @_[0];
}

# These are located down here since they screw up fontlock.

sub do_cmd_file{
    # This uses a weird HTML construct to adjust the font to be
    # reasonable match that used in the printed form as much as
    # possible.  The expected behavior is that a browser that doesn't
    # understand "<font face=...>" markup will use courier (or whatever
    # the font is for <tt>).
    local($_) = @_;
    s/$any_next_pair_pr_rx/`<tt><font face=sans-serif>\2<\/font><\/tt>'/;
    $_;
}

sub do_cmd_samp{
    local($_) = @_;
    s/$any_next_pair_pr_rx/`<samp>\2<\/samp>'/;
    $_;
}

1;				# This must be the last line