freebsd-dev/usr.bin/sgmlfmt/sgmlfmt.pl
John Fieber d8c5d59031 Command line arguments are now gathered by NewGetOpt. Command line
syntax is slightly changed:  -format is now -f format.

New option: -i name
This is a switch to control marked sections in SGML documents.  Useful
for multi-lingual documents.
1995-08-31 00:14:02 +00:00

712 lines
17 KiB
Perl
Executable File

#!/usr/bin/perl
# $Id: sgmlfmt.pl,v 1.5 1995/08/29 01:02:12 jfieber Exp $
# Format an sgml document tagged according to the linuxdoc DTD.
# by John Fieber <jfieber@freebsd.org> for the FreeBSD documentation
# project.
#
# Usage: sgmlformat -format [-format ...] [-links] inputfile [inputfile ...]
#
# -format outputfile format
# -------------------------------------------------------------
# -html inputfile.html HTML
# -txt | -ascii inputfile.ascii ascii text
# -tex | -latex inputfile.tex LaTeX
# -nroff inputfile.nroff groff for ms macros
# -ps inputfile.ps postscript
#
# -links For each <label id="foo">, make a symbolic
# link foo.html -> inputfile-n.html.
#
# Bugs:
#
# Text lines that start with a period (.) confuse the conversions that
# use groff. The workaround is to make sure the SGML source doesn't
# have any periods at the beginning of a line.
#
# Although legal by the DTD, it the ascii formatting gets botched if
# the <heading></heading> tags are omitted following a <sect?>.
#
# The whole approach of using sgmlsasp and passing a few things
# through for processing by this script is doomed. This whole thing
# needs to be re-thought and a better DTD should be used anyway.
#
#######################################################################
# Look in a couple places for the SGML DTD and replacement files
#
require 'newgetopt.pl';
if (-d "$ENV{'HOME'}/lib/sgml/FreeBSD") {
$sgmldir = "$ENV{'HOME'}/lib/sgml";
}
elsif (-d "$ENV{'HOME'}/sgml/FreeBSD") {
$sgmldir = "$ENV{'HOME'}/sgml";
}
elsif (-d "/usr/share/sgml/FreeBSD" ) {
$sgmldir = "/usr/share/sgml";
}
else {
die "Cannot locate sgml files!\n";
}
#
# Locate the DTD, an SGML declaration, and the replacement files
#
$dtdbase = "$sgmldir/FreeBSD";
$dtd = "$dtdbase/dtd/linuxdoc";
if (-f "$dtd.dec") {
$decl = "$dtd.dec";
}
else {
$decl = "";
}
$replbase = "$dtdbase/rep";
if (! $ENV{"SGML_PATH"}) {
$ENV{"SGML_PATH"} = "$sgmldir/%O/%C/%T";
}
sub usage {
print "Usage:\n";
print "sgmlfmt -f <format> [-i <namea> [-i <nameb> ...]] [-links] filename[.sgml]\n";
print "where <format> is one of: html, latex, ascii, nroff\n";
}
#
# Look for the file specified on the command line
#
sub getfile {
local($filearg) = @_;
if (-f "$filearg.sgml") {
$file = "$filearg.sgml";
}
elsif (-f $filearg) {
$file = $filearg;
}
else {
return 0;
}
$fileroot = $file;
$fileroot =~ s/.*\///; # drop the path
$fileroot =~ s/\.sgml$//; # drop the .sgml
$filepath = $file;
$filepath =~ s/\/*[^\/]*$//;
if ($filepath eq "") {
$ENV{"SGML_PATH"} .= ":.";
}
else {
$ENV{"SGML_PATH"} .= ":$filepath/%S:.";
}
return 1;
}
#
# A function to run sgmls and sgmlsasp on the input file.
#
# Arguments:
# 1. A file handle for the output
# 2. A replacement file (directory actually)
#
sub sgmlparse {
local($fhandle, $replacement) = @_;
$defines = join(" -i ", @opt_i);
if ($defines ne "") {
$defines = "-i $defines";
}
$ENV{'SGML_PATH'} = "$replbase/$replacement.%N:$ENV{'SGML_PATH'}";
open($fhandle, "sgmls $defines $decl $file | sgmlsasp $replbase/$replacement.mapping |");
}
#
# Generate nroff output
#
sub gen_nroff {
open (outfile, ">$fileroot.nroff");
&sgmlparse(infile, "nroff");
$\ = "\n"; # automatically add newline on print
while (<infile>) {
chop;
# This is supposed to ensure that no text line starts
# with a dot (.), thus confusing groff, but it doesn't
# appear to work.
unless (/^\.DS/.../^\.DE/) {
s/^[ \t]{1,}(.*)/$1/g;
}
s/^\.[ \t].*/\\\&$&/g;
print outfile;
}
$\ = "";
close(infile);
close(outfile);
}
#
# Generate ASCII output using groff
#
sub gen_ascii {
&sgmlparse(infile, "nroff");
open(outfile, "| groff -T ascii -t -ms | col -b > $fileroot.ascii");
while (<infile>) {
print outfile;
}
close(infile);
close(outfile);
}
#
# Generate Postscript output using groff (this is suboptimal
# for printed output!)
#
sub gen_ps {
&sgmlparse(infile, "grops");
open(outfile, "| groff -T ps -t -ms > $fileroot.ps");
while (<infile>) {
print outfile;
}
close(infile);
close(outfile);
}
#
# Generate LaTeX output
#
sub gen_latex {
open(outfile, ">$fileroot.tex");
&sgmlparse(infile, "latex");
while (<infile>) {
print outfile;
}
close(infile);
close(outfile);
}
#
# Generate HTML output.
#
# HTML is generated in two passes.
#
# The first pass takes the output from sgmlsasp and gathers information
# about the structure of the document that is used in the sceond pass
# for splitting the file into separate files. Targets for cross
# references are also stored in this pass.
#
# Based on the information from the first pass, the second pass
# generates a numbered series of HTML files, a "toplevel" file
# containing the title, author, abstract and a brief table of
# contents. A detailed table of contents is also generated. The
# second pass generates links for cross references and URLs.
#
# Tunable parameters
#
$maxlevel = 3; # max section depth
$num_depth = 4; # depth of numbering
$m_depth = 2; # depth of menus
$sc = 0; # section counter
$filecount = 0; # file counter
# Other variables:
#
# st_xxxx - Section Table. Arrays containing information about a
# given section. To be accesssed via the section counter $sc.
#
# st_ol - The output level of the given section. I.E. how many
# levels from the table of contents does it lie in terms
# of HTML files which is distinct from <sect1>, <sect2> etc.
# levels.
#
# st_sl - The absolute depth of a section. Contrast st_ol.
#
# st_num - The section number in the form X.Y.Z....
#
# st_file - The HTML file the section belongs to.
#
# st_header - The text of the section title.
#
# st_parent - The section number of the given sections parent.
sub gen_html {
local($i, $sl);
$tmpfile = "/tmp/sgmlf.$$";
open(bar, ">$tmpfile");
# print STDERR "(Pass 1...";
&sgmlparse(foo, "html");
while (<foo>) {
print bar;
# count up the number of files to be generated
# and gather assorted info about the document structure
if (/^<@@sect>/) {
$sl++; # current section level
$sc++; # current section number
$st_sl[$sc] = $sl;
# In case this section has subsections, set the parent
# pointer for this level to point at this section.
$parent_pointer[$sl] = $sc;
# Figure out who is the parent if this section.
$st_parent[$sc] = $parent_pointer[$sl - 1];
# Per level counters
$counter[$sl]++;
$counter[$sl + 1] = 0;
# calculate the section number in the form x.y.z.
if ($sl <= $num_depth) {
$st_num[$sc] = $st_num[$st_parent[$sc]] . "$counter[$sl].";
}
# calculate the file number and output level
if ($sl <= $maxlevel) {
$filecount++;
$st_ol[$sc] = $sl;
}
else {
$st_ol[$sc] = $maxlevel;
}
$st_file[$sc] = $filecount;
# Calculate the highest level node in which this
# node should appear as a menu item.
$st_pl[$sc] = $sl - $m_depth;
if ($st_pl[$sc] < 0) {
$st_pl[$sc] = 0;
}
if ($st_pl[$sc] > $maxlevel) {
$st_pl[$sc] = $maxlevel;
}
}
if (/^<@@endsect>/) {
$sl--;
}
# record section titles
if (/^<@@head>/) {
chop;
s/^<@@head>//;
$st_header[$sc] = $_;
}
# record the section number that a label occurs in
if (/^<@@label>/) {
chop;
s/^<@@label>//;
if ($references{$_} eq "") {
$references{$_} = "$filecount";
if ($opt_links) {
&extlink($_, "${fileroot}${filecount}.html");
}
}
else {
print STDERR "Warning: the label `$_' is multiply-defined.\n";
}
}
}
close(bar);
open(foofile, $tmpfile);
&html2html(foofile, "boo");
unlink($tmpfile);
}
#
# HTML conversion, pass number 2
#
sub html2html {
local($infile, $outfile) = @_;
local($i);
$sc = 0;
push(@scs, $sc);
open(tocfile, ">${fileroot}_toc.html");
print tocfile "<HTML>\n";
while (<$infile>) {
# change `<' and `>' to `&lt;' and `&gt;' in <pre></pre>
if (/<pre>/.../<\/pre>/) {
s/</\&lt;/g;
s/\&lt;([\/]*)pre>/<\1pre>/g;
s/>/\&gt;/g;
s/<([\/]*)pre\&gt;/<\1pre>/g;
}
# remove extraneous empty paragraphs (it is arguable that this
# is really a bug with the DTD, but changing it would break
# almost every document written to this DTD.)
s/<p><\/p>//;
tagsw: {
# titles and headings
if (s/^<@@title>//) {
chop;
$st_header[0] = $_;
$st_parent[0] = -1;
print tocfile "<HEAD>\n<TITLE>$st_header[0]</TITLE>\n</HEAD>\n";
print tocfile "<H1>$st_header[0]</H1>\n";
$header[$st_ol[$sc]] =
"<HTML>\n<HEAD>\n<TITLE>$st_header[0]</TITLE>\n" .
"</HEAD>\n<BODY>\n<H1>$st_header[0]</H1>\n";
$footer[$st_ol[$sc]] = "</BODY>\n</HTML>\n";
last tagsw;
}
#
# HEADER begin
#
if (s/^<@@head>//) {
chop;
if ($part == 1) {
$text[0] .= "<H1>Part $partnum:<BR>$_";
last tagsw;
}
$href = "\"${fileroot}$st_file[$sc].html#$sc\"";
# set up headers and footers
if ($st_sl[$sc] > 0 && $st_sl[$sc] <= $maxlevel) {
$header[$st_ol[$sc]] =
"<HTML>\n<HEAD>\n<TITLE>$_</TITLE>\n</HEAD>\n" .
"<BODY>\n$navbar[$st_ol[$sc]]\n<HR>\n";
$footer[$st_ol[$sc]] =
"<HR>\n$navbar[$st_ol[$sc]]\n</BODY>\n</HTML>";
}
# Add this to the master table of contents
print tocfile "<DD>$st_num[$sc] " .
"<A HREF=$href>$_";
# Calculate the <H?> level to use in the HTML file
$hlevel = $st_sl[$sc] - $st_ol[$sc] + 2;
$shlevel = $st_sl[$sc] - $st_ol[$sc] + 3;
$i = $st_ol[$sc];
# Add the section header
$text[$i] .= "<H$hlevel><A NAME=\"$sc\"></A>$st_num[$sc] $_";
$i--;
# And also to the parent
if ($st_sl[$sc] == $st_ol[$sc] && $i >= 0) {
$text[$i] .= "<H$shlevel>$st_num[$sc] " .
"<A HREF=$href>$_";
$i--;
}
# and to the grandparents
for (; $i >= $st_pl[$sc]; $i--) {
$text[$i] .= "<DD>$st_num[$sc] " .
"<A HREF=$href>$_";
}
last tagsw;
}
#
# HEADER end
#
if (s/^<@@endhead>//) {
if ($part == 1) {
$text[0] .= "</H1>\n";
$part = 0;
last tagsw;
}
print tocfile "</A></DD>\n";
$i = $st_ol[$sc];
# Close the section header
$text[$i] .= "</H$hlevel>\n";
$i--;
# in the parent...
if ($st_sl[$sc] == $st_ol[$sc] && $i >= 0) {
$text[$i] .= "</A></H$shlevel>\n";
$i--;
}
# in the grandparent...
for (; $i >= $st_pl[$sc]; $i--) {
$text[$i] .= "</A></DD>\n";
}
last tagsw;
}
# sectioning
if (s/^<@@part>//) {
$part = 1;
$partnum++;
last tagsw;
}
#
# BEGINNING of a section
#
if (s/^<@@sect>//) {
# Increment the section counter and save it on a stack
# for future reference.
$sc++;
push(@scs, $sc);
# Set up the navigation bar
if ($st_file[$sc] > $st_file[$sc - 1]) {
&navbar($st_file[$sc], $filecount, $sc);
}
# Prepare for menu entries in the table of contents and
# parent file(s).
if ($st_sl[$sc - 1] < $st_sl[$sc]) {
print tocfile "<DL>\n";
$i = $st_ol[$sc] - 1 - ($st_sl[$sc] == $st_ol[$sc]);
for (; $i >= $st_pl[$sc]; $i--) {
$text[$i] .= "<DL>\n";
}
}
last tagsw;
}
#
# END of a section
#
if (s/^<@@endsect>//) {
# Remember the section number! Subsections may have
# altered the global $sc variable.
local ($lsc) = pop(@scs);
# Close off subsection menus we may have created in
# parent file(s).
if ($st_sl[$lsc] > $st_sl[$sc + 1]) {
print tocfile "</DL>\n";
$i = $st_ol[$lsc] - 1 - ($st_sl[$lsc] == $st_ol[$lsc]);
for (; $i >= $st_pl[$lsc]; $i--) {
$text[$i] .= "</DL>\n";
}
}
# If this section is below $maxlevel, write it now.
if ($st_sl[$lsc] <= $maxlevel) {
open(SECOUT, ">${fileroot}$st_file[$lsc].html");
print SECOUT "$header[$st_ol[$lsc]] $text[$st_ol[$lsc]] " .
"$footer[$st_ol[$lsc]]";
$text[$st_ol[$lsc]] = "";
close(SECOUT);
}
last tagsw;
}
# cross references
if (s/^<@@label>//) {
chop;
$text[$st_ol[$sc]] .= "<A NAME=\"$_\"></A>";
last tagsw;
}
if (s/^<@@ref>//) {
chop;
$refname = $_;
if ($references{$_} eq "") {
print "Warning: Reference to $_ has no defined target\n";
}
else {
$text[$st_ol[$sc]] .=
"<A HREF=\"${fileroot}$references{$_}.html#$_\">";
}
last tagsw;
}
if (s/^<@@endref>//) {
# $text[$st_ol[$sc]] .= "</A>";
last tagsw;
}
if (s/^<@@refnam>//) {
$text[$st_ol[$sc]] .= "$refname</A>";
last tagsw;
}
# URLs
if (s/^<@@url>//) {
chop;
$urlname = $_;
$text[$st_ol[$sc]] .= "<A HREF=\"$urlname\">";
last tagsw;
}
if (s/^<@@urlnam>//) {
$text[$st_ol[$sc]] .= "$urlname</A>";
last tagsw;
}
if (s/^<@@endurl>//) {
# $text[$st_ol[$sc]] .= "</A>";
last tagsw;
}
# If nothing else did anything with this line, just print it.
$text[$st_ol[$sc]] .= "$_";
}
}
print tocfile "</HTML>";
open(SECOUT, ">$fileroot.html");
print SECOUT "$header[0] $text[0] $footer[0]";
close(SECOUT);
close tocfile;
}
# navbar
#
# Generate a navigation bar to go on the top and bottom of the page.
sub navbar {
local ($fnum, $fmax, $sc) = @_;
local ($i, $itext, $prv, $nxt);
# Generate the section hierarchy
$navbar[$st_ol[$sc]] =
"<B><A HREF=\"${fileroot}.html\"><EM>$st_header[0]</EM></A>\n";
$i = $st_parent[$sc];
while ($i > 0) {
$itext = " : <A HREF=\"${fileroot}$st_file[$i].html\"><EM>$st_header[$i]</EM></A>\n$itext";
$i = $st_parent[$i];
}
$navbar[$st_ol[$sc]] .= "$itext : <EM>$st_header[$sc]</EM><BR>\n";
# Generate previous and next pointers
# Previous pointer must be in a different file AND must be at the
# same or higher section level. If the current node is the
# beginning of a chapter, then previous will go to the beginning
# of the previous chapter, not the end of the previous chapter.
$prv = $sc;
while ($prv >= 0 && $st_file[$prv] >= $st_file[$sc] - 1) {
$prv--;
}
$prv++;
$navbar[$st_ol[$sc]] .=
"Previous: <A HREF=\"${fileroot}$st_file[$prv].html\"><EM>$st_header[$prv]</EM></A><BR>\n";
# Then next pointer must be in a higher numbered file OR the home
# page of the document.
$nxt = $sc;
if ($st_file[$nxt] == $filecount) {
$nxt = 0;
}
else {
while ($st_file[$nxt] == $st_file[$sc]) {
$nxt++;
}
}
$navbar[$st_ol[$sc]] .=
"Next: <A HREF=\"${fileroot}$st_file[$nxt].html\"><EM>$st_header[$nxt]</EM></A>\n";
$navbar[$st_ol[$sc]] .= "</B>\n";
}
# extlink
#
# creates a symbolic link from the name in a reference to the numbered
# html file. Since the file number that any given section has is
# subject to change as the document goes through revisions, this allows
# for a fixed target that separate documents can hook into.
#
# Slashes (/) in the reference are converted to percents (%) while
# spaces ( ) are converted to underscores (_);
sub extlink {
local ($ref, $fn) = @_;
$ref =~ s/\//%/g;
$ref =~ s/ /_/g;
$file = "$ref.html";
if (-e $file) {
if (-l $file) {
unlink($file);
symlink($fn, $file);
}
else {
print "Warning: $file exists and is not a symbolic link\n";
}
}
else {
symlink($fn, $file);
}
}
# Now, read the command line and take appropriate action
sub main {
# Check arguments
if (!&NGetOpt('f=s', 'links', 'i:s@')) {
&usage;
exit 1;
}
if (@ARGV == 0) {
print "An input file must be specified.\n";
&usage;
exit 1;
}
if (&getfile($ARGV[0]) == 0) {
print "Cannot locate specified file: $ARGV[0]\n";
&usage;
exit 1;
}
# Generate output
if ($opt_f eq 'html') {
print "generating $fileroot.html";
if ($opt_links == 1) {
print " with external links";
}
print "...\n"; &gen_html();
}
elsif ($opt_f eq 'tex' || $opt_f eq 'latex') {
print "generating $fileroot.tex...\n"; &gen_latex();
}
elsif ($opt_f eq 'nroff') {
print "generating $fileroot.nroff...\n"; &gen_nroff();
}
elsif ($opt_f eq 'ascii') {
print "generating $fileroot.ascii...\n"; &gen_ascii();
}
elsif ($opt_f eq 'ps') {
print "generating $fileroot.ps...\n"; &gen_ps();
}
else {
if ($opt_f eq "") {
print "An output format must be specified with the -f option.\n";
}
else {
print "\"$opt_f\" is an unknown output format.\n";
}
&usage;
exit 1;
}
}
&main;
exit 0;