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bird/tools/linuxdoc-tools/LinuxDocTools/Html2Html.pm

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#
# Html2Html.pm
#
# $Id: Html2Html.pm,v 1.4 2001/08/31 23:09:10 sano Exp $
#
# Convert parsed linuxdoc-sgml to html.
# - Split files; match references, generate TOC and navigation
# aids, etc.
#
# Rules based on html2html.l
#
package LinuxDocTools::Html2Html;
use FileHandle;
use LinuxDocTools::Lang;
# Externally visible variables
$html2html = {};
# Initialize: set splitlevel, extension, images, filename,
# filenumber, label, header, footer, toclevel,
# tmpbase, debug.
# Usage:
# &{$html2html->{init}}(split,ext,img,filename,filenum,label,hdr,ftr,toc,tmpbase, debug);
# split level: 0 - super page mode
# 1 - big page mode
# 2 - small page mode
$html2html->{init} = sub {
$splitlevel = shift;
SWITCH: {
$super_page_mode = 0, $big_page_mode = 1, last SWITCH
if ($splitlevel == 1);
$super_page_mode = 0, $big_page_mode = 0, last SWITCH
if ($splitlevel == 2);
}
$fileext = shift;
$use_imgs = shift;
$firstname = shift;
$filecount = 1 + shift;
$lprec = shift;
$header = shift;
$footer = shift;
$toclevel = shift;
if ($toclevel == -1) {
if ($splitlevel == 0) {
$toclevel = 0;
} else {
$toclevel = 2;
}
}
$tmpbase = shift;
$content_file = $tmpbase . ".content";
$debug = shift;
$nextlabel = Xlat ("Next");
$prevlabel = Xlat ("Previous");
$toclabel = Xlat ("Contents");
};
# Package variables
$big_page_mode = 0; # '-2' subsection splitting
$super_page_mode = 1; # One page vs. page/section
$chapter_mode = 0; # <article> vs. <report>
$current = ""; # State of section/subsection/etc.
$filenum = 1; # Current output file number
$filecount = 1;
$firstname = "$$"; # Base name for file
$headbuf = ""; # Buffer for URL's
$fileext = "html"; # "html" vs. "htm" for 8.3
$in_appendix = 0; # n.n vs. a.n section numbers
$in_section_list = 0; # List of sections flag
$language = ""; # Default English; use '-Lname'
# $lprec{label} # Label record
$nextlabel = ""; # Link string
$outfh = STDOUT; # Output filehandle
$outname = ""; # Output file name
$prevlabel = ""; # Link string
$refname = ""; # Ref string
$sectname = ""; # Section name
$secnr = 0; # Section count
$ssectname = ""; # Subsection name
$ssecnr = 0; # Subsection count
$skipnewline = 0; # Flag to ignore new line
$toclabel = ""; # Link string
$titlename = ""; # Title of document
$use_imgs = 0; # '-img' pictorial links
$urlname = ""; # Name for url links
$header = "";
$footer = "";
$toclevel = -1;
$tmpbase = "/tmp/sgmltmp" . $$;
$debug = 0;
$content_file = $tmpbase . ".content.init";
# Ruleset
$html2html->{rules} = {}; # Individual parsing rules
$html2html->{rules}->{'^<@@appendix>.*$'} = sub {
$in_appendix = 1; $secnr = 0; $ssecnr = 0;
};
$html2html->{rules}->{'^<@@url>(.*)$'} = sub {
$skipnewline = 1; $urlname = $1; $headbuf = qq(<A HREF="$1">);
};
$html2html->{rules}->{'^<@@urlnam>(.*)$'} = sub {
$headbuf = $headbuf . "$urlname</A>";
};
$html2html->{rules}->{'^<@@endurl>.*$'} = sub {
$skipnewline = -1; $outfh->print($headbuf); $headbuf = "";
};
$html2html->{rules}->{'^<@@title>(.*)$'} = sub {
$titlename = $1; &heading(STDOUT); print(STDOUT "<H1>$1</H1>\n\n");
};
$html2html->{rules}->{'^<@@head>(.*)$'} = sub {
$skipnewline = 1; $headbuf = $1;
};
$html2html->{rules}->{'^<@@part>.*$'} = sub { $current = "PART"; };
$html2html->{rules}->{'^<@@endhead>.*$'} = sub {
SWITCH: {
$outfh->print("<H1>$headbuf</H1>\n\n"), last SWITCH
if ($current eq "PART");
$outfh->print("<H1>$headbuf</H1>\n\n"), last SWITCH
if ($current eq "CHAPTER");
$outfh->print("<H2>$headbuf</H2>\n\n"), last SWITCH
if ($current eq "SECTION");
$outfh->print("<H2>$headbuf</H2>\n\n"), last SWITCH
if ($current eq "SUBSECT");
$outfh->print("<H3>$headbuf</H3>\n\n"), last SWITCH;
}
$current = ""; $headbuf = ""; $skipnewline = 0;
};
$html2html->{rules}->{'^<@@chapt>(.*)$'} = sub {
$chapter_mode = 1; $skipnewline = 1; $sectname = $1;
&start_chapter($sectname);
};
$html2html->{rules}->{'^<@@sect>(.*)$'} = sub {
$skipnewline = 1; $ssectname = $1;
if ($chapter_mode) {
&start_section($ssectname);
} else {
$sectname = $ssectname; &start_chapter($ssectname);
}
};
$html2html->{rules}->{'^<@@ssect>(.*)$'} = sub {
$skipnewline = 1; $ssectname = $1;
if (!$chapter_mode) {
&start_section($ssectname);
} else {
$current = ""; $headbuf = $ssectname;
}
};
$html2html->{rules}->{'^<@@endchapt>.*$'} = sub {
STDOUT->print("</UL>\n") if ($in_section_list);
if ($outfh->fileno != STDOUT->fileno) {
&footing($outfh) if (!$super_page_mode);
$outfh->close; $outfh = STDOUT;
}
};
$html2html->{rules}->{'^<@@endsect>.*$'} = sub {
STDOUT->print("</UL>\n") if (!$chapter_mode && $in_section_list);
if (($outfh->fileno != STDOUT->fileno)
&& ((!$chapter_mode) || (!$big_page_mode))) {
&footing($outfh) if (!$super_page_mode);
$outfh->close; $outfh = STDOUT;
}
};
$html2html->{rules}->{'^<@@endssect>.*$'} = sub {
if (($outfh->fileno != STDOUT->fileno)
&& (!$chapter_mode) && (!$big_page_mode) && (!$super_page_mode)) {
&footing($outfh); $outfh->close; $outfh = STDOUT;
}
};
$html2html->{rules}->{'^<@@enddoc>.*$'} = sub { };
$html2html->{rules}->{'^<@@label>(.*)$'} = sub {
if (!defined($lprec->{$1})) {
STDERR->print(qq(html2html: Problem with label "$1"\n)); next;
}
if ($skipnewline) {
$headbuf = sprintf(qq(<A NAME="%s"></A> %s), $1, $headbuf);
} else {
$outfh->print(qq(<A NAME="$1"></A> ));
}
};
$html2html->{rules}->{'^<@@ref>(.*)$'} = sub {
my $tmp;
$refname = $1;
if (!defined($lprec->{$1})) {
STDERR->print(qq(html2html: Problem with ref "$1"\n));
$skipnewline++; next;
}
SWITCH: {
$tmp = qq(<A HREF="#$1">), last SWITCH
if ($lprec->{$1} == $filenum - 1);
$tmp = qq(<A HREF="$firstname.$fileext#$1">), last SWITCH
if ($lprec->{$1} == 0);
$tmp = qq(<A HREF="$firstname-$lprec->{$1}.$fileext#$1">),
last SWITCH;
}
if ($skipnewline) {
$headbuf = "$headbuf$tmp";
} else {
$headbuf = $tmp;
}
$skipnewline++;
};
$html2html->{rules}->{'^<@@refnam>.*$'} = sub {
$headbuf = "$headbuf$refname</A>\n";
};
$html2html->{rules}->{'^<@@endref>.*$'} = sub {
if ($skipnewline == 1) {
$outfh->print($headbuf); $skipnewline = -1;
} elsif ($skipnewline == 2) {
$skipnewline--;
} else {
STDERR->print("html2html: Problem with endref\n");
$skipnewline--;
}
};
# Default parsing rule
$html2html->{defaultrule} = sub {
$skipnewline++ if ($skipnewline < 0);
if ($skipnewline) {
chop; $headbuf = "$headbuf$_";
} else {
$outfh->print($_);
}
};
# Finalize parsing process
$html2html->{finish} = sub {
# Finish footers
if ($outfh->fileno != STDOUT->fileno) {
if (!$super_page_mode) {
&footing($outfh);
$outfh->close;
}
}
#
if ($super_page_mode) {
if ($toclevel > 0) { STDOUT->print("\n<HR>\n"); }
$outfh->close if ($outfh->fileno != STDOUT->fileno);
if ( -r $content_file ) {
open CONTENT, "<$content_file"
or die "Can't open content file\n";
while (<CONTENT>) {
STDOUT->print($_);
}
close CONTENT;
unlink $content_file if (! $debug);
}
}
# Finish the TOC; ensure "next" points to the first page.
&browse_links(STDOUT, 1, 0) if (!$super_page_mode);
#
# add Footer
if ( -r "$footer" ) {
open FTRFILE, "<$footer" or die "Cannot open footer file\n";
while (<FTRFILE>) {
STDOUT->print($_);
}
close FTRFILE;
} else {
STDOUT->print("</BODY>\n</HTML>\n");
}
};
###################################################################
# Secondary Functions
###################################################################
# Print standard links
sub browse_links {
my ($outfh, $myfilenum, $top) = @_;
return if ($super_page_mode);
$outfh->print("<HR>\n") unless ($top);
# NOTE: For pages where a next or prev button isn't appropriate, include
# the graphic anyway - just don't make it a link. That way, the mouse
# position of each button is unchanged from page to page.
# Use the passed myfilenum since filenum may already be incremented
# Next link (first)
my $next = $use_imgs
? qq(<IMG SRC="next.png" ALT="$nextlabel">)
: qq($nextlabel);
$next = qq(<A HREF="$firstname-$myfilenum.$fileext">$next</A>)
if ($myfilenum < $filecount);
$next = join "", $next, "\n";
$outfh->print($next);
# Previous link
my $prev = $use_imgs
? qq(<IMG SRC="prev.png" ALT="$prevlabel">)
: qq($prevlabel);
$prev = join "", qq(<A HREF="$firstname-), ($myfilenum - 2),
qq(.$fileext">$prev</A>)
if ($myfilenum >= 3);
$prev = join "", $prev, "\n";
$outfh->print($prev);
# Table of contents link
my $toc = $use_imgs
? qq(<IMG SRC="toc.png" ALT="$toclabel">)
: qq($toclabel);
$toc = join "", qq(<A HREF="$firstname.$fileext#toc),
&section_num($secnr, 0), qq(">$toc</A>)
if ($outfh->fileno != STDOUT->fileno);
$toc = join "", $toc, "\n";
$outfh->print($toc);
print($outfh "<HR>\n") if ($top);
}
# Print end-of-file markup
sub footing {
my $outfh = shift;
&browse_links($outfh, $filenum, 0);
if ( -r "$footer" ) {
open FTRFILE, "<$footer" or die "Cannot open footer file\n";
while (<FTRFILE>) {
$outfh->print($_);
}
close FTRFILE;
} else {
$outfh->print("</BODY>\n</HTML>\n");
}
}
# Print top-of-file markup
sub heading {
my $outfh = shift; my $match;
# Emit 3.2 HTML until somebody comes up with a better idea - CdG
if ( -r "$header" ) {
open HDRFILE, "<$header" or die "Cannot open header file\n";
while (<HDRFILE>) {
$outfh->print($_);
}
close HDRFILE;
} else {
$outfh->print(
qq(<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 3.2 Final//EN">\n));
$outfh->print("<HTML>\n<HEAD>\n");
}
open VERSFILE, "<$main::DataDir/VERSION" or die "Cannot open version file\n";
$version = <VERSFILE>;
close VERSFILE;
chop $version;
$outfh->print(
" <META NAME=\"GENERATOR\" CONTENT=\"LinuxDoc-Tools $version\">\n");
$outfh->print(" <TITLE>");
$match = $titlename;
$match =~ s/<[^>]*>//g;
$outfh->print($match);
if ($secnr > 0) {
$match = $sectname;
$match =~ s/<[^>]*>//g;
$outfh->print(": $match");
}
if ($ssecnr > 0) {
$match = $ssectname;
$match =~ s/<[^>]*>//g;
$outfh->print(": $match");
}
$outfh->print("</TITLE>\n");
if (!$super_page_mode) {
#
# <LINK> Information for next, previous, contents, etc...
#
$outfh->print(qq( <LINK HREF="$firstname-$filenum.$fileext" REL=next>),"\n")
if ($filenum < $filecount);
my $prev;
$prev = join "", qq( <LINK HREF="$firstname-), ($filenum - 2),
qq(.$fileext" REL=previous>)
if ($filenum >= 3);
$outfh->print($prev,"\n");
#
# Table of contents link
#
my $toc ;
$toc = join "", qq( <LINK HREF="$firstname.$fileext#toc),
&section_num($secnr, 0), qq(" REL=contents>)
if ($outfh->fileno != STDOUT->fileno);
$outfh->print($toc,"\n");
} # (!$super_page_mode)
$outfh->print("</HEAD>\n<BODY>\n");
&browse_links($outfh, $filenum, 1);
}
# Return the section and subsection as a dotted string
sub section_num {
my ($sec, $ssec) = @_;
my $l = "A";
if ($in_appendix) {
$sec--;
while ($sec) { $l++; $sec--; }
return("$l.$ssec") if ($ssec > 0);
return("$l");
} else {
return("$sec.$ssec") if ($ssec > 0);
return("$sec");
}
}
# Create a chapter head; start a new file, etc.
sub start_chapter {
my $sectname = shift;
if (!$super_page_mode && $outfh->fileno != STDOUT->fileno) {
&footing($outfh); $outfh->close;
}
$current = "SECTION"; $secnr++; $ssecnr = 0;
if ($super_page_mode) {
$outname = $content_file;
$outfh = new FileHandle ">>$outname"
or die qq(html2html: Fatal: Could not open file "$outname"\n);
if ($toclevel > 0) {
$headbuf = sprintf(
qq(<A NAME="s%s">%s.</A> <A HREF="#toc%s">%s</A>),
&section_num($secnr, 0), &section_num($secnr, 0),
&section_num($secnr, 0),
$sectname);
STDOUT->printf(
qq(<P>\n<H2><A NAME="toc%s">%s.</A> <A HREF="%s#s%s">%s</A></H2>\n\n),
&section_num($secnr, 0), &section_num($secnr, 0),
"$firstname.$fileext", &section_num($secnr, 0), $sectname);
} else {
$headbuf = sprintf(
qq(<A NAME="s%s">%s. %s</A>),
&section_num($secnr, 0), &section_num($secnr, 0),
$sectname);
}
} else {
$outname = "$firstname-$filenum.$fileext"; $filenum++;
$outfh = new FileHandle ">$outname"
or die qq(html2html: Fatal: Could not open file "$outname"\n);
&heading($outfh);
if ($toclevel > 0) {
$headbuf = sprintf(
qq(<A NAME="s%s">%s.</A> <A HREF="%s#toc%s">%s</A>),
&section_num($secnr, 0), &section_num($secnr, 0),
"$firstname.$fileext", &section_num($secnr, 0),
$sectname);
STDOUT->printf(
qq(<P>\n<H2><A NAME="toc%s">%s.</A> <A HREF="%s">%s</A></H2>\n\n),
&section_num($secnr, 0), &section_num($secnr, 0),
$outname, $sectname);
} else {
$headbuf = sprintf(
qq(<A NAME="s%s">%s. %s</A>),
&section_num($secnr, 0), &section_num($secnr, 0),
$sectname);
}
}
$in_section_list = 0;
}
# Create a section; start a new file, etc.
sub start_section {
my $ssectname = shift;
$current = "SUBSECT"; $ssecnr++;
if ($toclevel > 1) {
if (!$in_section_list) {
STDOUT->print("<UL>\n"); $in_section_list = 1;
}
}
if ($super_page_mode) {
if ($outfh->fileno != STDOUT->fileno && !$chapter_mode) {
$outfh->close;
}
$outname = $content_file;
$outfh = new FileHandle ">>$outname"
or die qq(html2html: Fatal: Could not open file "$outname"\n);
if ($toclevel > 1) {
$headbuf = sprintf(qq(<A NAME="ss%s">%s</A> <A HREF="#toc%s">%s</A>\n),
&section_num($secnr, $ssecnr),
&section_num($secnr, $ssecnr),
&section_num($secnr, $ssecnr),
$ssectname);
STDOUT->printf(
qq(<LI><A NAME="toc%s">%s</A> <A HREF="%s#ss%s">%s</A>\n),
&section_num($secnr, $ssecnr),
&section_num($secnr, $ssecnr),
"$firstname.$fileext",
&section_num($secnr, $ssecnr),
$ssectname);
} else {
$headbuf = sprintf(qq(<A NAME="ss%s">%s %s</A>\n),
&section_num($secnr, $ssecnr),
&section_num($secnr, $ssecnr),
$ssectname);
}
} else {
if (!$big_page_mode) {
if ($outfh->fileno != STDOUT->fileno) {
&footing($outfh); $outfh->close;
}
$outname = "$firstname-$filenum.$fileext"; $filenum++;
$outfh = new FileHandle ">$outname"
or die qq(html2html: Fatal: Could not open file "$outname"\n);
heading($outfh);
# Since only one section is on any page,
# don't use # so that when we
# jump to this page, we see the browse
# links at the top of the page.
if ($toclevel > 1) {
$headbuf = sprintf("%s <A HREF=\"%s#toc%s\">%s</A>",
&section_num($secnr, $ssecnr),
"$firstname.$fileext",
&section_num($secnr, $ssecnr),
$ssectname);
STDOUT->printf(
qq(<LI><A NAME="toc%s">%s</A> <A HREF="%s">%s</A>\n),
&section_num($secnr, $ssecnr),
&section_num($secnr, $ssecnr),
$outname, $ssectname);
} else {
$headbuf = sprintf("%s %s</A>",
&section_num($secnr, $ssecnr),
$ssectname);
}
} else {
# Since many sections are on one page, we need to use #
if ($toclevel > 1) {
$headbuf = sprintf(
qq(<A NAME="ss%s">%s</A> <A HREF="%s#toc%s">%s</A>\n),
&section_num($secnr, $ssecnr),
&section_num($secnr, $ssecnr),
"$firstname.$fileext",
&section_num($secnr, $ssecnr),
$ssectname);
STDOUT->printf(
qq(<LI><A NAME="toc%s">%s</A> <A HREF="%s#ss%s">%s</A>\n),
&section_num($secnr, $ssecnr),
&section_num($secnr, $ssecnr),
$outname,
&section_num($secnr, $ssecnr),
$ssectname);
} else {
$headbuf = sprintf(
qq(<A NAME="ss%s">%s %s</A>\n),
&section_num($secnr, $ssecnr),
&section_num($secnr, $ssecnr),
$ssectname);
}
}
}
}