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|
#! /usr/bin/perl
# Script to pre-process XML input before processing it for various purposes.
# Options specify which transformations are to be done. Monospaced literal
# layout blocks are never touched.
# Changes:
# -ascii: Replace ’ by '
# Replace © by (c)
# Replace † by *
# Replace ‡ by **
# Replace by a space
# Replace – by -
# Put quotes round <quote> text
#
# -quoteliteral:
# Put quotes round <literal> text
#
# -bookinfo: Remove the <bookinfo> element from the file
#
# -fi: Replace "fi" by fi except when it is in an XML element, or
# inside a <literal>.
#
# -html: Certain things are done only for HTML output:
#
# If <literallayout> is followed by optional space and then a
# newline, the space and newline are removed, because otherwise you
# get a blank line in the HTML output.
#
# -noindex Remove the XML that generates indexes.
# -oneindex Ditto, but add XML to generate a single index.
#
# -optbreak Insert an optional line break (zero-width space, ​) after
# every underscore in text within <option> and <variable> elements,
# except when preceded by <entry> (i.e. not in tables). The same is
# also done within a word of four or more upper-case letters (for
# compile-time options).
# The function that processes non-literal, non-monospaced text
sub process()
{
my($s) = $_[0];
$s =~ s/fi(?![^<>]*>)/fi/g if $ligatures;
if ($optbreak)
{
$s =~ s%(?<!<entry>)(<option>|<varname>)([^<]+)%
my($x,$y) = ($1,$2); $y =~ s/_/_​/g; "$x"."$y"%gex;
$s =~ s?\b([A-Z_]{4,})\b?
my($x) = $1; $x =~ s/_/_​/g; "$x"?gex;
}
if ($ascii)
{
$s =~ s/’/'/g;
$s =~ s/©/(c)/g;
$s =~ s/†/*/g;
$s =~ s/‡/**/g;
$s =~ s/&nsbp;/ /g;
$s =~ s/–/-/g;
$s =~ s/<quote>/"/g;
$s =~ s/<\/quote>/"/g;
}
$s;
}
# The main program
$ascii = 0;
$bookinfo = 0;
$html = 0;
$inliteral = 0;
$inliterallayout = 0;
$ligatures = 0;
$madeindex = 0;
$noindex = 0;
$oneindex = 0;
$optbreak = 0;
$quoteliteral = 0;
foreach $arg (@ARGV)
{
if ($arg eq "-fi") { $ligatures = 1; }
elsif ($arg eq "-ascii") { $ascii = 1; }
elsif ($arg eq "-bookinfo") { $bookinfo = 1; }
elsif ($arg eq "-html") { $html = 1; }
elsif ($arg eq "-noindex") { $noindex = 1; }
elsif ($arg eq "-oneindex") { $oneindex = 1; }
elsif ($arg eq "-optbreak") { $optbreak = 1; }
elsif ($arg eq "-quoteliteral") { $quoteliteral = 1; }
else { die "** Pre-xml: Unknown option \"$arg\"\n"; }
}
while (<STDIN>)
{
# Remove <bookinfo> if required
if ($bookinfo && /^<bookinfo/)
{
while (<STDIN>) { last if /^<\/bookinfo/; }
next;
}
# Copy monospaced literallayout blocks
if (/^<literallayout class="monospaced">/)
{
$_ = substr($_, 0, -1) if $html;
print;
while (<STDIN>)
{
print;
last if /^<\/literallayout>/;
}
next;
}
# Adjust index-generation code if required
if (($noindex || $oneindex) && /^<index[\s>]/)
{
while (<STDIN>)
{
last if /^<\/index>/;
}
if ($oneindex && !$madeindex)
{
$madeindex = 1;
print "<index><title>Index</title></index>\n";
}
next;
}
# A line that is not in a monospaced literal block; keep track of which
# parts are in <literal> and which not. The latter get processed by the
# function above. Items in <literal> get quoted unless they are also in
# a <literallayout> block, or are already being quoted.
for (;;)
{
$_ = substr($_, 0, -1) if $html && /^<literallayout[^>]*>\s*\n$/;
$inliterallayout = 1 if /^<literallayout/;
$inliterallayout = 0 if /^<\/literallayout/;
if ($inliteral)
{
if (/^(.*?)<\/literal>(?!<\/quote>)(.*)$/)
{
print $1;
print "\"" if $quoteliteral && !$inliterallayout;
print "</literal>";
$inliteral = 0;
$_ = "$2\n";
}
else
{
print;
last;
}
}
# Not in literal state
else
{
if (/^(.*?)(?<!<quote>)<literal>(.*)$/)
{
print &process($1);
print "<literal>";
print "\"" if $quoteliteral && !$inliterallayout;
$inliteral = 1;
$_ = "$2\n";
}
else
{
print &process($_);
last;
}
}
} # Loop for different parts of one line
} # Loop for multiple lines
# End
|
