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|
#! /usr/bin/perl -w
# This is a script that turns the SGCAL source of Exim's documentation into
# HTML. It can be used for both the filter document and the main Exim
# specification. The syntax is
#
# g2h [-split no|section|chapter] <source file> <title>
#
# Previously, -split section was used for the filter document, and -split
# chapter for the main specification. However, the filter document has gained
# some chapters, so they are both split by chapter now. Only one -split can be
# specified.
#
# A number of assumptions about the style of the input markup are made.
#
# The HTML is written into the directory html/ using the source file base
# name as its base.
# Written by Philip Hazel
# Starting 21-Dec-2001
# Last modified 26-Nov-2003
#############################################################################
##################################################
# Open an output file #
##################################################
sub openout {
open (OUT, ">$_[0]") || die "Can't open $_[0]\n";
# Boilerplate
print OUT "<!DOCTYPE HTML PUBLIC \"-//IETF//DTD HTML//EN\">\n";
print OUT "<html>\n<head>\n<title>$doctitle" .
(($thischapter > 0)? " chapter $thischapter" : "") .
(($thissection > 0)? " section $thissection" : "") .
"</title>\n</head>\n" .
"<body bgcolor=\"#F8F8F8\" text=\"#00005A\" " .
"link=\"#FF6600\" alink=\"#FF9933\" vlink=\"#990000\">\n";
# Forward/backward links when chapter splitting
if ($chapsplit)
{
print OUT "<font size=2>\n";
printf OUT ("<a href=\"${file_base}_%s.html\">Previous</a> \n",
$thischapter - 1) if $thischapter > 1;
printf OUT ("<a href=\"${file_base}_%s.html\">Next</a> \n",
$thischapter + 1) if $thischapter < $maxchapter;
print OUT "<a href=\"${file_base}_toc.html\">Contents</a>\n";
print OUT " " x 6, "($doctitle)\n</font><hr>\n";
}
# Forward/backward links when section splitting
elsif ($sectsplit)
{
print OUT "<font size=2>\n";
printf OUT ("<a href=\"${file_base}_%s.html\">Previous</a> \n",
$thissection - 1) if $thissection > 1;
printf OUT ("<a href=\"${file_base}_%s.html\">Next</a> \n",
$thissection + 1) if $thissection < $maxsection;
print OUT "<a href=\"${file_base}_toc.html\">Contents</a>\n";
print OUT " " x 6, "($doctitle)\n</font><hr>\n";
}
# Save the final component of the current file name (for TOC creation)
$_[0] =~ /^(?:.*)\/([^\/]+)$/;
$current_file = $1;
}
##################################################
# Close an output file #
##################################################
# The first argument is one of:
#
# "CHAP" a chapter is ending
# "SECT" a section is ending
# "" the whole thing is ending
#
# In the first two cases $thischapter and $thissection contain the new chapter
# and section numbers, respectively. In the third case, we can deduce what is
# ending from the flags. The variables contain the current values.
sub closeout {
my($s) = $_[0];
print OUT "<hr>\n" if !$lastwasrule;
&setpar(0);
if ($s eq "CHAP")
{
print OUT "<font size=2>\n";
printf OUT ("<a href=\"${file_base}_%s.html\">Previous</a> ",
$thischapter - 2) if ($thischapter > 2);
print OUT "<a href=\"${file_base}_$thischapter.html\">Next</a> ";
print OUT "<a href=\"${file_base}_toc.html\">Contents</a>\n";
print OUT " " x 6, "($doctitle)\n</font>\n";
}
elsif ($s eq "SECT")
{
print OUT "<font size=2>\n";
printf OUT ("<a href=\"${file_base}_%s.html\">Previous</a> ",
$thissection - 2) if ($thissection > 2);
print OUT "<a href=\"${file_base}_$thissection.html\">Next</a> ";
print OUT "<a href=\"${file_base}_toc.html\">Contents</a>\n";
print OUT " " x 6, "($doctitle)\n</font>\n";
}
else
{
if ($chapsplit)
{
print OUT "<font size=2>\n";
printf OUT ("<a href=\"${file_base}_%s.html\">Previous</a> ",
$thischapter - 1) if ($thischapter > 1);
print OUT "<a href=\"${file_base}_toc.html\">Contents</a>\n";
print OUT " " x 6, "($doctitle)\n</font>\n";
}
elsif ($sectsplit)
{
print OUT "<font size=2>\n";
printf OUT ("<a href=\"${file_base}_%s.html\">Previous</a> ",
$thissection - 1) if ($thissection > 1);
print OUT "<a href=\"${file_base}_toc.html\">Contents</a>\n";
print OUT " " x 6, "($doctitle)\n</font>\n";
}
}
print OUT "</body>\n</html>\n";
close(OUT);
}
##################################################
# Handle an index line #
##################################################
# This function returns an empty string so that it can be called as part
# of an s operator when handling index items within paragraphs. The two
# arguments are:
#
# the text to index, already converted to HTML
# 1 for the concept index, 0 for the options index
sub handle_index {
my($text) = $_[0];
my($hash) = $_[1]? \%cindex : \%oindex;
my ($key,$ref);
# Up the index count, and compute the reference to the file and the
# label within it.
$index_count++;
$ref = $chapsplit?
"${file_base}_$thischapter.html#IX$index_count"
: $sectsplit?
"${file_base}_$thissection.html#IX$index_count"
:
"#IX$index_count";
# Create the index key, which consists of the text with all the HTML
# coding and any leading quotation marks removed. Turn the primary/secondary
# splitting string "||" into ":".
$text =~ s/\|\|/:/g;
$key = "$text";
$key =~ s/<[^>]+>//g;
$key =~ s/&#(\d+);/chr($1)/eg;
$key =~ s/^`+//;
$key =~ s/^"//;
# Turn all spaces in the text into so that they don't ever split.
# However, there may be spaces in the HTML that already exists in the
# text, so we have to avoid changing spaces inside <>.
$text =~ s/ (?=[^<>]*(?:<|$))/ /g;
# If this is the first encounter with this index key, we create a
# straightforward reference.
if (!defined $$hash{$key})
{
$$hash{$key} = "<a href=\"$ref\">$text</a>";
}
# For the second and subsequent encounters, add "[2]" etc. to the
# index text. We find out the number by counting occurrences of "<a"
# in the existing string.
else
{
my($number) = 1;
$number++ while $$hash{$key} =~ /<a/g;
$$hash{$key} .= " <a href=\"$ref\">[$number]</a>";
}
# Place the name in the current output
print OUT "<a name=\"IX$index_count\"></a>\n";
return "";
}
##################################################
# Handle emphasis bars #
##################################################
# Set colour green for text marked with "emphasis bars", keeping
# track in case the matching isn't perfect.
sub setinem {
if ($_[0])
{
return "" if $inem;
$inem = 1;
return "<font color=green>\n";
}
else
{
return "" if !$inem;
$inem = 0;
return "</font>\n";
}
}
##################################################
# Convert marked-up text #
##################################################
# This function converts text from SGCAL markup to HTML markup, with a couple
# of exceptions:
#
# 1. We don't touch $t because that is handled by the .display code.
#
# 2. The text may contain embedded .index, .em, and .nem directives. We
# handle .em and .nem, but leave .index because it must be done during
# paragraph outputting.
#
# In a non-"rm" display, we turn $rm{ into cancelling of <tt>. Otherwise
# it is ignored - in practice it is only used in that special case.
#
# The order in which things are done in this function is highly sensitive!
sub handle_text {
my($s) = $_[0];
my($rmspecial) = $_[1];
# Escape all & characters (they aren't involved in markup) but for the moment
# use &+ instead of &# so that we can handle # characters in the text.
$s =~ s/&/&+038;/g;
# Turn SGCAL literals into HTML literals that don't look like SGCAL
# markup, so won't be touched by what follows. Again, use + instead of #.
$s =~ s/@@/&+064;/g;
$s =~ s/@([^@])/"&+".sprintf("%0.3d",ord($1)).";"/eg;
# Now turn any #s that are markup into spaces, and convert the previously
# created literals to the correct form.
$s =~ s/#/ /g;
$s =~ s/&\+(\d+);/&#$1;/g;
# Some simple markup that doesn't involve argument text.
$s =~ s/\$~//g; # turn $~ into nothing
$s =~ s/__/_/g; # turn __ into _
$s =~ s/--(?=$|\s|\d)/–/mg; # turn -- into endash in text or number range
$s =~ s/\(c\)/©/g; # turn (c) into copyright symbol
# Use double quotes
# $s =~ s/`([^']+)'/``$1''/g;
$s =~ s/`([^']+)'/“$1”/g;
# This is a fudge for some specific usages of $<; can't just do a global
# is it occurs in things like "$<variable name>" as well.
$s =~ s/(\d)\$<-/$1-/g; # turn 0$<- into 0-
$s =~ s/\$<//g; # other $< is ignored
# Turn <<...>> into equivalent SGCAL markup that doesn't involve the use of
# < and >, and then escape the remaining < and > characters in the text.
$s =~ s/<<([^>]*?)>>/<\$it{$1}>/g; # turn <<xxx>> into <$it{xxx}>
$s =~ s/</</g;
$s =~ s/>/>/g;
# Other markup...
$s =~ s/\$sm\{//g; # turn $sm{ into nothing
$s =~ s/\$smc\{//g; # turn $smc{ into nothing
$s =~ s/\$smi\{//g; # turn $smi{ into nothing
$s =~ s/\$tt\{([^\}]*?)\}/<tt>$1<\/tt>/g; # turn $tt{xxx} into <tt>xxx</tt>
$s =~ s/\$it\{([^\}]*?)\}/<em>$1<\/em>/g; # turn $it{xxx} into <em>xxx</em>
$s =~ s/\$bf\{([^\}]*?)\}/<b>$1<\/b>/g; # turn $bf{xxx} into <b>xxx</b>
$s =~ s/\$cb\{([^\}]*?)\}/<tt><b>$1<\/b><\/tt>/g; # turn $cb{xxx} into
# <tt><b>xxx</b></tt>
$s =~ s/\\\\([^\\]*?)\\\\/<font size=-1>$1<\/font>/g; # turn \\xxx\\ into
# small font
$s =~ s/\\\?([^?]*?)\?\\/<a href="$1">$1<\/a>/g; # turn \?URL?\ into URL
$s =~ s/\\\(([^)]*?)\)\\/<i>$1<\/i>/g; # turn \(xxx)\ into <i>xxx</i>
$s =~ s/\\\"([^\"]*?)\"\\/<tt>$1<\/tt>/g; # turn \"xxx"\ into <tt>xxx</tt>
$s =~ s/\\\$([^\$]*?)\$\\/<tt>\$$1<\/tt>/g; # turn \$xxx$\ into <tt>$xxx</tt>
$s =~ s/\\\-([^\\]*?)\-\\/<i>-$1<\/i>/g; # turn \-xxx-\ into -italic
$s =~ s/\\\*\*([^*]*?)\*\*\\/<b>$1<\/b>/g; # turn \**xxx**\ into <b>xxx</b>
$s =~ s/\\\*([^*]*?)\*\\/<i>$1<\/i>/g; # turn \*xxx*\ into italic
$s =~ s/\\%([^*]*?)%\\/<b>$1<\/b>/g; # turn \%xxx%\ into bold
$s =~ s/\\([^\\]*?)\\/<tt>$1<\/tt>/g; # turn \xxx\ into <tt>xxx</tt>
$s =~ s/::([^\$]*?)::/<i>$1:<\/i>/g; # turn ::xxx:: into italic:
$s =~ s/\$\*\$/\*/g; # turn $*$ into *
# Handle $rm{...}
if ($rmspecial)
{
$s =~ s/\$rm\{([^\}]*?)\}/<\/tt>$1<tt>/g; # turn $rm{xxx} into </tt>xxx<tt>
}
else
{
$s =~ s/\$rm\{([^\}]*?)\}/$1/g; # turn $rm{xxx} into xxx
}
# There is one case where the terminating } of an escape sequence is
# in another paragraph - this follows $sm{ - it can be fixed by
# removing any stray } in a paragraph that contains no { chars.
$s =~ s/\}//g if !/\{/;
# Remove any null flags ($$)
$s =~ s/\$\$//g;
# If the paragraph starts with $c\b, remove it.
$s =~ s/^\$c\b//;
# If the paragraph starts with $e\b, indent it slightly.
$s =~ s/^\$e\b/ /;
# Handle .em, and .nem directives that occur within the paragraph
$s =~ s/\.em\s*\n/&setinem(1)/eg;
$s =~ s/\.nem\s*\n/&setinem(0)/eg;
# Explicitly included HTML
$s =~ s/\[\(([^)]+)\)\]/<$1>/g; # turn [(...)] into <...>
# Finally, do the substitutions and return the modified text.
$s =~ s/~~(\w+)/$var_value{$1}/eg;
return $s;
}
##################################################
# Start/end a paragraph #
##################################################
# We want to leave paragraphs unterminated until we know that a horizontal
# rule does not follow, to avoid getting space inserted before the rule,
# which doesn't look good. So we have this function to help control things.
# If the argument is 1 we are starting a new paragraph; if it is 0 we want
# to force the ending of any incomplete paragraph.
sub setpar {
if ($inpar)
{
print OUT "</p>\n";
$inpar = 0;
}
if ($_[0])
{
print OUT "<p>\n";
$inpar = 1;
}
}
##################################################
# Handle a "paragraph" #
##################################################
# Read a paragraph of text, which may contain many lines and may contain
# .index, .em, and .nem directives within it. We may also encounter
# ".if ~~html" within paragraphs. Process those directives,
# convert the markup, and output the rest as an HTML paragraph.
sub handle_paragraph{
my($par) = $_;
my($htmlcond) = 0;
while(<IN>)
{
if (/^\.if\s+~~html\b/)
{
$htmlcond = 1;
$par =~ s/\s+$//; # lose unwanted whitespace and newlines
next;
}
elsif ($htmlcond && /^\.else\b/)
{
while (<IN>) { last if /^\.fi\b/; }
$htmlcond = 0;
next;
}
elsif ($htmlcond && /^\.fi\b/)
{
$htmlcond = 0;
next;
}
last if /^\s*$/ || (/^\./ && !/^\.index\b/ && !/^\.em\b/ && !/^\.nem\b/);
$par .= $_;
}
$par = &handle_text($par, 0);
# We can't handle .index until this point, when we do it just before
# outputting the paragraph.
if ($par !~ /^\s*$/)
{
&setpar(1);
$par =~ s/\.index\s+([^\n]+)\n/&handle_index($1, 1)/eg;
print OUT "$par";
}
}
##################################################
# Handle a non-paragraph directive #
##################################################
# The directives .index, .em, and .nem can also appear within paragraphs,
# and are then handled within the handle_paragraph() code.
sub handle_directive{
my($new_lastwasitem) = 0;
$lastwasrule = 0;
if (/^\.r?set\b/ || /^\.(?:\s|$)/) {} # ignore .(r)set and comments
elsif (/^\.justify\b/) {} # and .justify
elsif (/^\.newline\b/) { print OUT "<br>\n"; }
elsif (/^\.blank\b/ || /^\.space\b/) { print OUT "<br>\n"; }
elsif (/^\.rule\b/) { &setpar(0); print OUT "<hr>\n"; $lastwasrule = 1; }
elsif (/^\.index\s+(.*)/) { &handle_index(&handle_text($1), 1); }
# Emphasis is handled by colour
elsif (/^\.em\b/)
{
&setpar(0);
print OUT "<font color=green>" if ! $inem;
$inem = 1;
}
elsif (/^\.nem\b/)
{
&setpar(0);
print OUT "</font>" if $inem;
$inem = 0;
}
# Ignore tab setting stuff - we use tables instead.
elsif (/^\.tabs(?:et)?\b/) {}
# .tempindent is used only to align some of the expansion stuff nicely;
# just ignore it. It is used in conjunction with .push/.pop.
elsif (/^\.(tempindent|push|pop)\b/) {}
# There are some instances of .if ~~sys.fancy in the source. Some of those
# that are not inside displays are two-part things, in which case we just keep
# the non-fancy part. For diagrams, however, they are in three parts:
#
# .if ~~sys.fancy
# <aspic drawing stuff for PostScript and PDF>
# .elif !~~html
# <ascii art for txt and Texinfo>
# .else
# <HTML instructions for including a gif>
# .fi
#
# In this case, we skip to the third part.
elsif (/^\.if\s+~~sys\.fancy/ || /^\.else\b/)
{
while (<IN>)
{ last if /^\.else\b/ || /^\.elif\s+!\s*~~html/ || /^\.fi\b/; }
if (/^\.elif\b/)
{
while (<IN>) { last if /^\.else\b/ || /^\.fi\b/; }
}
}
# Similarly, for .if !~~sys.fancy, take the non-fancy part.
elsif (/^\.if\s+!\s*~~sys.fancy/) {}
# There are some explicit tests for ~~html for direct HTML inclusions
elsif (/^\.if\s+~~html\b/) {}
# There are occasional requirements to do things differently for Texinfo/HTML
# and PS/txt versions. The latter are produced by SGCAL, so that's what the
# flag is called.
elsif (/\.if\s+~~sgcal/)
{
while (<IN>) { last if /\.else\b/ || /\.fi\b/; }
}
# Also there is a texinfo flag
elsif (/^\.if\s+~~texinfo\b/)
{
while (<IN>)
{ last if /^\.else\b/ || /^\.elif\s+!\s*~~html/ || /^\.fi\b/; }
}
# Ignore any other .if, .else, or .fi directives
elsif (/^\.if\b/ || /^\.fi\b/ || /^\.else\b/) {}
# Ignore .indent
elsif (/^\.indent\b/) {}
# Various flavours of numberpars map to corresponding list types.
elsif (/^\.numberpars\b/)
{
$rest = $';
&setpar(0);
if ($rest =~ /(?:\$\.|\" \")/)
{
unshift @endlist, "ul";
unshift @listtype, "";
print OUT "<ul>\n<li>";
}
else
{
$nptype = ($rest =~ /roman/)? "a" : "1";
unshift @endlist, "ol";
unshift @listtype, " TYPE=\"$nptype\"";
print OUT "<ol>\n<li$listtype[0]>";
}
}
elsif (/^\.nextp\b/)
{
&setpar(0);
print OUT "</li>\n<li$listtype[0]>";
}
elsif (/^\.endp\b/)
{
&setpar(0);
print OUT "</li>\n</$endlist[0]>\n";
shift @listtype;
shift @endlist;
}
# .display asis can use <pre> which uses a typewriter font.
# Otherwise, we have to do our own line breaking. Turn tabbed lines
# into an HTML table. There will always be a .tabs line first.
elsif (/^\.display\b/)
{
my($intable) = 0;
my($asis) = /asis/;
my($rm) = /rm/;
my($eol,$indent);
# For non asis displays, start a paragraph, and set up to put an
# explicit break after every line.
if (!$asis)
{
&setpar(1);
$eol = "<br>";
$indent = "<tt> </tt>";
}
# For asis displays, use <pre> and no explicit breaks
else
{
print OUT "<pre>\n";
$eol = "";
$indent = " ";
}
# Now read through until we hit .endd (or EOF, but that shouldn't happen)
# and process the lines in the display.
while (<IN>)
{
last if /^\.endd\b/;
# The presence of .tabs[et] starts a table
if (/^\.tabs/)
{
$intable = 1;
print OUT "<table cellspacing=0 cellpadding=0>\n";
}
# Some displays have an indent setting - ignore
elsif (/^\.indent\b/) {}
# Some displays have .blank inside them
elsif (/^\.blank\b/)
{
print OUT "<br>\n";
}
# Some displays have emphasis inside them
elsif (/^\.em\b/)
{
print OUT "<font color=green>" if ! $inem;
$inem = 1;
}
elsif (/^\.nem\b/)
{
print OUT "</font>" if $inem;
$inem = 0;
}
# There are occasional instances of .if [!]~~sys.fancy inside displays.
# In both cases we want the non-fancy alternative. (The only thing that
# matters in practice is noticing .tabs[et] actually.) Assume the syntax
# is valid.
elsif (/^\.if\s+~~sys.fancy/ || /^\.else\b/)
{
while (<IN>)
{
last if /^\.fi\b/ || /^\.else/;
}
}
elsif (/^\.if\s+!\s*~~sys.fancy/) {}
elsif (/^\.fi\b/) {}
# Ignore .newline and .linelength
elsif (/^\.newline\b/ || /^\.linelength\b/) {}
# Ignore comments
elsif (/^\.(\s|$)/) {}
# There shouldn't be any other directives inside displays
elsif (/^\./)
{
print "*** Ignored directive inside .display: $_";
}
# Handle a data line within a display. If it's an asis display, the only
# conversion is to escape the HTML characters. Otherwise, process the
# SGCAL markup.
else
{
chomp;
if ($asis)
{
s/&/&/g;
s/</</g;
s/>/>/g;
}
else
{
$_ = &handle_text($_, !$rm);
$_ = "<tt>$_</tt>" if !$rm && $_ ne "";
}
# In a table, break fields at $t. For non-rm we must break the
# <tt> group as well.
if ($intable)
{
if ($rm)
{
s/\s*\$t\s*/ <\/td><td>/g;
}
else
{
s/\s*\$t\s*/ <\/tt><\/td><td><tt>/g;
}
s/<tt><\/tt>//g;
print OUT "<tr><td> $_</td></tr>\n";
}
# Otherwise, output straight, with <br> for non asis displays
else
{
s/<tt><\/tt>//g;
print OUT "$indent$_$eol\n";
}
}
} # Loop for display contents
# Finish off the table and the <pre> - leave a paragraph open
print OUT "</table>\n" if $intable;
print OUT "</pre>\n" if $asis;
}
# Handle configuration option definitions
elsif (/^\.startconf\s+(.*)/)
{
$confuse = &handle_text($1);
}
elsif (/^\.conf\b/)
{
my($option, $type, $default) =
/^\.conf\s+(\S+)\s+("(?:[^"]|"")+"|\S+)\s+("(?:[^"]|"")+"|.*)/;
$option =~ s/\@_/_/g; # Underscore will be quoted in option name
# If $type ends with $**$, add ",expanded" as there doesn't seem to be
# a dagger character generally available.
$type =~ s/^"([^"]+)"/$1/;
$type =~ s/\$\*\*\$/, expanded/;
# Default may be quoted, and it may also have quotes that are required,
# if it is a string.
$default =~ s/^"(.*)"$/$1/;
$default =~ s/""/"/g;
$default = &handle_text($default, 0);
print OUT "<hr>";
&setpar(0);
&handle_index($option, 0);
print OUT "<h3>$option</h3>\n" .
"<i>Use:</i> $confuse<br>" .
"<i>Type:</i> $type<br><i>Default:</i> $default<br>\n";
}
elsif (/^\.endconf\b/)
{
print OUT "<hr><br>\n";
}
# Handle "items" - used for expansion items and the like. We force the
# item text into bold, and put a rule between items.
elsif (/^\.startitems\b/) {}
elsif (/^\.item\s+(.*)/)
{
my($arg) = $1;
chomp($arg);
$arg =~ s/^"(.*)"$/$1/;
$arg = &handle_text($arg, 0);
# If there are two .items in a row, we don't want to put in the
# separator line or start a new paragraph.
if ($lastwasitem)
{
print OUT "<br>";
}
else
{
print OUT "<hr>";
&setpar(1);
}
print OUT "<b>$arg</b>\n";
$new_lastwasitem = 1;
}
elsif (/^\.enditems\b/)
{
print OUT "<hr><br>\n";
}
# Handle command line option items
elsif (/^\.startoptions\b/) {}
elsif (/^\.option\s+(.*)/)
{
my($arg) = $1;
$arg =~ s/"([^"]*)"/$1/g;
print OUT "<hr>";
&setpar(0);
# For indexing, we want to take up to the first # or < in the line,
# before processing.
my($name) = $arg =~ /^([^#<]+)/;
$name = &handle_text($name, 0);
&handle_index("-$name", 0);
# Output as heading, after the index
$arg = &handle_text($arg, 0);
print OUT "<h3>-$arg</h3>\n";
}
elsif (/^\.endoptions\b/)
{
print OUT "<hr><br>\n";
}
# Found an SGCAL directive that isn't dealt with. Oh dear.
else
{
print "*** Unexpected SGCAL directive: line $. ignored:\n";
print "$_\n";
}
# Remember if last was a .item, and read the next line
$lastwasitem = $new_lastwasitem;
$_ = <IN>;
}
##################################################
# First Pass - collect references #
##################################################
sub pass_one{
$thischapter = 0;
open (IN, $source_file) || die "Can't open $source_file (first pass)\n";
$_ = <IN>;
# At the start of the specification text, there are some textual replacement
# definitions. They set values, but not cross-references. They may be preceded
# by comments.
$_ = <IN> while (/^\.(\s|$)/);
while (/^\.r?set\s+(\S+)\s+"?([^"]+)\"?\s*$/)
{
$var_value{$1} = $2;
$_ = <IN>;
}
# Now skip on till we hit the start of the first chapter. It will be numbered
# 0 if we hit ".set chapter -1". There is only ever one unnumbered chapter.
while (!/^\.chapter/)
{
$thischapter = -1 if /^\.set\s+chapter\s+-1/;
$_ = <IN>;
}
# Loop for handling chapters
while ($_)
{
$thischapter++;
$thissection = 0;
# Scan through chapter, setting up cross-references to the chapter
# and to the sections within it.
while (<IN>)
{
last if /^\.chapter/;
chomp;
if (/^\.section/)
{
$thissection++;
next;
}
# Handle .(r)set directives.
if (/^\.r?set\s+(\S+)\s+"?([^"]+)\"?\s*$/ && $1 ne "runningfoot")
{
my($key,$value) = ($1,$2);
$value =~ s/~~chapter/$thischapter/e;
$value =~ s/~~section/$thissection/e;
# Only one of $chapsplit or $sectsplit can be set.
if ($key =~ /^CHAP/)
{
$value = $chapsplit?
"<a href=\"${file_base}_$thischapter.html\">$value</a>"
:
"<a href=\"#CHAP$thischapter\">$value</a>";
}
elsif ($key =~ /^SECT/)
{
$value = $chapsplit?
"<a href=\"${file_base}_$thischapter.html" .
"#SECT$thischapter.$thissection\">$value</a>"
:
$sectsplit? "<a href=\"${file_base}_$thissection.html\">$value</a>"
:
"<a href=\"#SECT$thischapter.$thissection\">$value</a>";
}
$var_value{$key} = $value;
}
}
}
close(IN);
}
##################################################
# Second Pass - generate HTML #
##################################################
sub pass_two{
my($tocn) = 0;
my($inmacro) = 0;
my($insection) = 0;
$inem = 0;
$thischapter = 0;
$thissection = 0;
# Open the source file and get the first line
open (IN, $source_file) || die "Can't open $source_file (2nd pass)\n";
$_ = <IN>;
# Skip on till we hit the start of the first chapter, but note if we
# pass ".set chapter -1", which is used to indicate no chapter numbering for
# the first chapter (we number is 0). Keep track of whether we are in macro
# definitions or not, and when not, notice occurrences of .index, because this
# are the "x see y" type entries.
while (!/^\.chapter/)
{
$thischapter = -1 if /^\.set\s+chapter\s+-1/;
$inmacro = 1 if /^\.macro/;
$inmacro = 0 if /^\.endm/;
if (!$inmacro && /^\.index\s+(.*)/)
{
my($key);
my($s) = $1;
$s = &handle_text($s, 0);
$s =~ s/ / /g; # All spaces unsplittable
$key = "\L$s";
$key =~ s/<[^>]+>//g;
$key =~ s/&#(\d+);/chr($1)/eg;
$cindex{$key} = $s;
}
$_ = <IN>;
}
# Open the TOC file
open (TOC, ">$html/${file_base}_toc.html") ||
die "Can't open $html/${file_base}_toc.html\n";
print TOC "<!DOCTYPE HTML PUBLIC \"-//IETF//DTD HTML//EN\">\n";
print TOC "<html>\n<head>\n<title>$doctitle Contents</title>\n</head>\n" .
"<body bgcolor=\"#F8F8F8\" text=\"#00005A\" " .
"link=\"#FF6600\" alink=\"#FF9933\" vlink=\"#990000\">\n";
print TOC "<h1>$doctitle</h1><hr>\n<ul>\n";
# Open the data file if we are not splitting at chapters
&openout("$html/${file_base}.html") if !$chapsplit;
# Loop for handling chapters. At the start of this loop, $_ is either EOF,
# or contains a .chapter line.
$firstchapter = $thischapter + 1;
while ($_)
{
print TOC "</ul>\n" if $insection;
$insection = 0;
$thischapter++;
$thissection = 0;
$lastwasrule = 0;
# Start a new file if required
if ($chapsplit)
{
&closeout("CHAP") if $thischapter != $firstchapter;
&openout("$html/${file_base}_$thischapter.html");
}
# Set up the chapter title. Save it for the TOC. Set up the anchor and
# link back to the TOC and show the title.
$_ =~ /^\.chapter\s+(.*)/;
my($title) = (($thischapter > 0)? "$thischapter. " : "") . &handle_text($1, 0);
$tocn++;
print TOC "<li><a " .
"name=\"TOC$tocn\" " .
"href=\"$current_file#CHAP$thischapter\">$title</a></li>\n";
print OUT "<h1>\n";
print OUT "<a name=\"CHAP$thischapter\" href=\"${file_base}_toc.html#TOC$tocn\">\n";
print OUT "$title\n</a></h1>\n";
# Scan the contents of the chapter
$_ = <IN>;
while ($_)
{
last if /^\.chapter/;
# Handle the start of a new section, starting a new file if required
if (/^\.section\s+(.*)/)
{
$thissection++;
print TOC "<ul>\n" if !$insection;
$insection = 1;
my($title) = (($thischapter > 0)? "$thischapter.$thissection " :
"$thissection. ") . &handle_text($1, 0);
if ($sectsplit)
{
&closeout("SECT");
&openout("$html/${file_base}_$thissection.html");
}
$tocn++;
printf TOC ("<li><a " .
"name=\"TOC$tocn\" " .
"href=\"$current_file#SECT%s$thissection\">%s</a></li>\n",
($thischapter > 0)? "$thischapter." : "", $title);
&setpar(0);
print OUT "<h2>\n";
printf OUT ("<a name=\"SECT%s$thissection\" ",
($thischapter > 0)? "$thischapter." : "");
print OUT "href=\"${file_base}_toc.html#TOC$tocn\">\n";
print OUT "$title\n</a></h2>\n";
$_ = <IN>;
$lastwasrule = 0;
}
# Blank lines at this level are ignored
elsif (/^\s*$/)
{
$_ = <IN>;
}
# Directive and non-directive lines are handled independently, though
# in each case further lines may be read. Afterwards, the next line is
# in $_. If .em is at the start of a paragraph, treat it with the
# paragraph, because the matching .nem will be too. Messy!
elsif (/^\./)
{
if (/^\.em\b/)
{
$_=<IN>;
if (/^\./)
{
print OUT "<font color=green>" if ! $inem;
$inem = 1;
# Used to handle it here - but that fails if it is .section.
# Just let the next iteration of the loop handle it.
# &handle_directive();
}
else
{
$_ = ".em\n" . $_;
&handle_paragraph();
$lastwasrule = 0;
$lastwasitem = 0;
}
}
# Not .em
else
{
&handle_directive();
}
}
# Not a directive
else
{
&handle_paragraph();
$lastwasrule = 0;
$lastwasitem = 0;
}
} # Loop for each line in a chapter
} # Loop for each chapter
# Close the last file, end off the TOC, and we are done.
&closeout("");
print TOC "</ul>\n" if $insection;
if (defined %cindex)
{
$cindex_tocn = ++$tocn;
print TOC "<li><a name=\"TOC$tocn\" ".
"href=\"${file_base}_cindex.html\">Concept Index</a></li>\n";
}
if (defined %oindex)
{
$oindex_tocn = ++$tocn;
print TOC "<li><a name=\"TOC$tocn\" ".
"href=\"${file_base}_oindex.html\">Option Index</a></li>\n";
}
print TOC "</ul>\n</body>\n</html>\n";
close(TOC);
close(IN);
}
##################################################
# Adjust index points #
##################################################
# Because of the way the source is written, there are often index entries
# that immediately follow the start of chapters and sections and the definition
# of "items" like "helo = verify". This gets the correct page numbers for the
# PostScript and PDF formats. However, for HTML we want the index anchor to be
# before the section heading, because browsers tend to put the index point at
# the top of the screen. So we re-read all the files we've just created, and
# move some of the index points about. This is necessary only if indexes exist.
# The files are small enough to be handled entirely in memory.
sub adjust_index_points {
print "Adjusting index points to precede headings\n";
$" = "";
opendir(DIR, "$html") || die "Failed to opendir $html\n";
while ($file = readdir(DIR))
{
my($i);
next unless $file =~ /^${file_base}_\d+\.html$/;
open(IN, "<$html/$file") ||
die "Failed to open $html/$file (read)\n";
my(@lines) = <IN>;
close(IN);
for ($i = 0; $i < @lines; $i++)
{
if ($lines[$i] =~ /^<a name="IX\d+"><\/a>$/)
{
# Handle an index line that follows a heading definition. Move it back
# to just before the <h1> or whatever. This preserves the order of
# multiple index lines, not that that matters.
if ($lines[$i-1] =~ /^<\/a><\/h(\d)>/)
{
my($j);
my($found) = 0;
for ($j = $i-2; $j > 0 && $j > $i - 10; $j--)
{
if ($lines[$j] =~ /<h$1>/)
{
$found = 1;
last;
}
}
if ($found)
{
splice(@lines, $j, 0, splice(@lines, $i, 1));
}
}
# Handle an index line that follows an "item". Move it back one line.
elsif ($lines[$i-1] =~ /^<b>.*<\/b>\s*$/)
{
splice(@lines, $i-1, 0, splice(@lines, $i, 1));
}
# Handle an index line that follows a "conf" definition
elsif ($lines[$i-1] =~ /^<i>Type:<\/i>/ && $lines[$i-2] =~ /^<h3>/)
{
splice(@lines, $i-2, 0, splice(@lines, $i, 1));
}
# Handle an index line that follows an "option" definition
elsif ($lines[$i-1] =~ /^<h3>/)
{
splice(@lines, $i-1, 0, splice(@lines, $i, 1));
}
}
}
open(OUT, ">$html/$file") ||
die "Failed to open $html/$file (write)\n";
print OUT "@lines";
close OUT;
undef @lines;
}
}
##################################################
# Create Index #
##################################################
sub create_index{
my($hash) = $_[0];
my($ifname) = $_[1];
my($ititle) = $_[2];
my(%indexindex);
open(INDEX, ">$html/${file_base}_$_[1].html") ||
die "Failed to open $html/${file_base}_$ifname\n";
print INDEX "<!DOCTYPE HTML PUBLIC \"-//IETF//DTD HTML//EN\">\n";
print INDEX "<html>\n<head>\n<title>$doctitle $ititle</title>\n";
print INDEX "<base target=\"body\">\n</head>\n";
print INDEX "<body bgcolor=\"#FFFFDF\" text=\"#00005A\" " .
"link=\"#FF6600\" alink=\"#FF9933\" vlink=\"#990000\">\n";
print INDEX "<h3>$ititle</h3>\n";
# We have to scan the keys in the hash twice; first to build the list
# of initial letters, and then to do the business. The first time we
# do not need to sort them.
foreach $key (keys %$hash)
{
my($initial) = substr($key,0,1);
$initial = "\U$initial";
$indexindex{$initial} = 1 if $initial ge "A" && $initial le "Z";
}
print INDEX "<p>\n";
foreach $key (sort keys %indexindex)
{
print INDEX " <a href=\"#$key\" target=\"index\">$key</a>\n";
}
print INDEX "<hr></p>\n";
my($letter) = "";
print INDEX "<p>\n";
foreach $key (sort
{
my($aa) = $a;
my($bb) = $b;
$aa =~ s/^\x93//; # Seems like the actual char values are
$bb =~ s/^\x93//; # set by this time, not "“"
return ("\L$aa" eq "\L$bb")? ("$aa" cmp "$bb") : ("\L$aa" cmp "\L$bb");
}
keys %$hash)
{
my($initial) = substr($key,0,1);
$initial = "\U$initial";
if ($initial ne $letter && $initial ge "A" && $initial le "Z")
{
print INDEX "<br>\n";
print INDEX "<a name=\"$initial\"></a>\n";
print INDEX "<font size=\"+1\">\U$initial\E</font><br>\n";
$letter = $initial;
}
print INDEX "$$hash{$key}<br>\n";
}
print INDEX "</p>\n";
print INDEX "</body>\n</html>\n";
close(INDEX);
}
##################################################
# Show usage and die #
##################################################
sub usage {
die "Usage: g2h [-split no|section|chapter] <source> <title>\n";
}
##################################################
# Entry point and main program #
##################################################
# Directory in which to put the new HTML files
$html = "html";
# Global variables.
%cindex = ();
%oindex = ();
$chapsplit = 0;
$cindex_tocn = 0;
$confuse = "";
$file_base = "";
$index_count = 0;
$inem = 0;
$inpar = 0;
$lastwasitem = 0;
$lastwasrule = 0;
$oindex_tocn = 0;
$sectsplit = 0;
$source_file = "";
$thischapter = 0;
$thissection = 0;
# Handle options
my($splitset) = 0;
while (scalar @ARGV > 0 && $ARGV[0] =~ /^-/)
{
if ($ARGV[0] eq "-split" && !$splitset)
{
$splitset = 1;
shift @ARGV;
my($type) = shift @ARGV;
if ($type eq "section") { $sectsplit = 1; }
elsif ($type eq "chapter") { $chapsplit = 1; }
elsif ($type eq "no" ) { $sectsplit = $chapsplit = 0; }
else { &usage(); }
}
else { &usage(); }
}
# Get the source file and its base
&usage() if scalar @ARGV <= 0;
$source_file = shift @ARGV;
($file_base) = $source_file =~ /^(.*)\.src$/;
&usage() if scalar @ARGV <= 0;
$doctitle = shift @ARGV;
print "\nCreate HTML for $doctitle from $source_file\n";
# Remove the old HTML files
print "Removing old HTML files\n";
system("/bin/rm -rf $html/${file_base}_*.html");
# First pass identifies all the chapters and sections, and collects the
# values of the cross-referencing variables.
print "Scanning for cross-references\n";
&pass_one();
$maxchapter = $thischapter; # Used if chapter splitting
$maxsection = $thissection; # Used if section splitting
# Second pass actually creates the HTML files.
print "Creating the HTML files\n";
&pass_two();
# Reprocess for moving some of the index points, if indexes were created
&adjust_index_points() if scalar(keys %cindex) > 0 || scalar(keys %oindex) > 0;
# Finally, we must create the option and concept indexes if any data
# has been collected for them.
if (scalar(keys %cindex) > 0)
{
print "Creating concept index\n";
&create_index(\%cindex, "cindex", "Concepts");
}
if (scalar(keys %oindex) > 0)
{
print "Creating option index\n";
&create_index(\%oindex, "oindex", "Options");
}
# End of g2h
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