Docs: strip changebars

[exim.git] / doc / doc-docbook / Tidytxt

diff --git a/doc/doc-docbook/Tidytxt b/doc/doc-docbook/Tidytxt
index 5e19c37f4e1370fac9f8f3e149d982ac5b2f31fc..296cdad6a78e5a91ec65726cea17232207cb8ba0 100755 (executable)
--- a/doc/doc-docbook/Tidytxt
+++ b/doc/doc-docbook/Tidytxt
@@ -1,17 +1,67 @@
 #! /usr/bin/perl
 
-# $Cambridge: exim/doc/doc-docbook/Tidytxt,v 1.2 2006/02/01 11:01:01 ph10 Exp $
+use strict;
+use warnings;
+use Getopt::Long;
+
+
+# For now we can't rely on a perl >= 5.14 on
+# the build sites, thus we throw away all unicode
+# awareness and do the matching byte by byte
+binmode STDIN;
+binmode STDOUT;
+
+GetOptions(
+    'u|utf8!' => \my $want_utf8,       # do not replace unicode characters
+) or die "Usage: $0 [-u|--utf8]\n";
 
 # Script to tidy up the output of w3m when it makes a text file. First we
 # convert sequences of blank lines into a single blank line, to get everything
 # uniform. Then we go through and insert blank lines before chapter and
 # sections, also converting chapter titles to uppercase.
 
-@lines = <>;
+# We also have to do some character translation in the first pass. It seems
+# that xmlto now generates Unicode in its HTML pages. This gives three problems:
+# (1) It inserts the byte sequence C2 A0 (U+00A0) as a fixed-width space;
+# (2) It uses U+25CF as its bullet character.
+# (3) It inserts a whole slew of "box drawing" characters round the heading.
 
-$lastwasblank = 0;
-foreach $line (@lines)
+my @lines = <>;
+my $lastwasblank = 0;
+
+foreach my $line (@lines)
   {
+  # (1) non-break space -> normal space
+  $line =~ s/\x{c2}\x{a0}/ /g;
+
+  unless ($want_utf8)
+    {
+    # (2) bullet -> asterisk
+    $line =~ s/\x{e2}\x{97}\x{8f}/*/g;
+    $line =~ s/\x{e2}\x{80}\x{a2}/*/g; # OpenSUSE
+    $line =~ s/\x{e2}\x{96}\x{a1}/*/g; # OpenSUSE
+    # (3a) horizontal box drawing -> hyphen
+    $line =~ s/\x{e2}\x{94}[\x{80}\x{81}\x{84}\x{85}\x{88}\x{89}]/-/g;
+    $line =~ s/\x{e2}\x{95}[\x{8c}\x{8d}\x{90}]/-/g;
+    $line =~ s/\x{e2}\x{95}[\x{b4}\x{b6}\x{b8}\x{ba}\x{bc}\x{be}]/-/g;
+    # (3b) vertical box drawing -> bar
+    $line =~ s/\x{e2}\x{94}[\x{82}\x{83}\x{86}\x{87}\x{8a}\x{8b}]/|/g;
+    $line =~ s/\x{e2}\x{95}[\x{8e}\x{8f}\x{91}]/|/g;
+    $line =~ s/\x{e2}\x{95}[\x{b5}\x{b7}\x{b9}\x{bb}\x{bd}\x{bf}]/|/g;
+    # (3c) corner box drawing -> plus
+    $line =~ s/\x{e2}\x{94}[\x{8c}-\x{bf}]/+/g;
+    $line =~ s/\x{e2}\x{95}[\x{80}-\x{8b}\x{92}-\x{b0}]/+/g;
+    # other
+    $line =~ s/\x{e2}\x{95}\x{b1}/\//g;
+    $line =~ s/\x{e2}\x{95}\x{b2}/\\/g;
+    $line =~ s/\x{e2}\x{95}\x{b3}/X/g;
+    }
+
+  # w3m rendering issue apparently only seen by pdp
+  # affects section numbers after the ToC, some info on spool-file -lines, etc
+  # always appears to be a spurious extra character, safely just dropped.
+  $line =~ s/\x{c2}//g;
+
   if ($line =~ /^\s*$/)
     {
     $line = "" if $lastwasblank;
@@ -23,22 +73,24 @@ foreach $line (@lines)
 
 # Find start of TOC, uppercasing its title
 
+my $i = 0;
 for ($i = 0; $i < scalar @lines; $i++)
   {
   $lines[$i] = "TABLE OF CONTENTS\n" if $lines[$i] =~ /^Table of Contents/;
-  last if $lines[$i] =~ /^1. /;
+  last if $lines[$i] =~ /^1\. /;
   }
 
 # Find start of first chapter
 
 for ($i++; $i < scalar @lines; $i++)
-  { last if $lines[$i] =~ /^1. /; }
+  { last if $lines[$i] =~ /^1\. /; }
 
 # Process the body. We can detect the starts of chapters and sections by
 # looking for preceding and following blank lines, and then matching against
 # the numbers.
 
-$chapter = 0;
+my $chapter = 0;
+my $section;
 for (; $i < scalar @lines; $i++)
   {
   next if $lines[$i-1] !~ /^$/ || $lines[$i+1] !~ /^$/;