X-Git-Url: https://git.exim.org/users/jgh/exim.git/blobdiff_plain/168e428fc4dfcf7f4d377d137743d8332784fa35..abf05f332065a5cd05e9569945b0e3e12bd7ba92:/doc/doc-docbook/Tidytxt

diff --git a/doc/doc-docbook/Tidytxt b/doc/doc-docbook/Tidytxt
index 02bf9dbd4..d218189ea 100755
--- a/doc/doc-docbook/Tidytxt
+++ b/doc/doc-docbook/Tidytxt
@@ -1,21 +1,95 @@
 #! /usr/bin/perl
 
-# $Cambridge: exim/doc/doc-docbook/Tidytxt,v 1.1 2005/06/16 10:32:31 ph10 Exp $
+# 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.
 
-# Script to tidy up the output of w3m when it makes a text file. We convert
-# sequences of blank lines into a single blank line.
+# 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.
 
-$blanks = 0;
-while (<>)
+@lines = <>;
+
+$lastwasblank = 0;
+foreach $line (@lines)
   {
-  if (/^\s*$/)
+  # (1) non-break space -> normal space
+  $line =~ s/\x{c2}\x{a0}/ /g;
+  # (2) bullet -> asterisk
+  $line =~ s/\x{e2}\x{97}\x{8f}/*/g;
+  # (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*$/)
     {
-    $blanks++;
+    $line = "" if $lastwasblank;
+    $lastwasblank = 1;
     next;
     }
-  print "\n" if $blanks > 0;
-  $blanks = 0;
-  print;
+  $lastwasblank = 0;
+  }
+
+# Find start of TOC, uppercasing its title
+
+for ($i = 0; $i < scalar @lines; $i++)
+  {
+  $lines[$i] = "TABLE OF CONTENTS\n" if $lines[$i] =~ /^Table of Contents/;
+  last if $lines[$i] =~ /^1\. /;
+  }
+
+# Find start of first chapter
+
+for ($i++; $i < scalar @lines; $i++)
+  { 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;
+for (; $i < scalar @lines; $i++)
+  {
+  next if $lines[$i-1] !~ /^$/ || $lines[$i+1] !~ /^$/;
+
+  # Start of chapter
+
+  if ($lines[$i] =~ /^(\d+)\. / && $1 == $chapter + 1)
+    {
+    $chapter++;
+    $section = 0;
+    $lines[$i] = "\n\n" . ("=" x 79) . "\n" . uc($lines[$i]);
+    }
+
+  # Start of next section
+
+  elsif ($lines[$i] =~ /^(\d+)\.(\d+) / && $1 == $chapter && $2 == $section + 1)
+    {
+    $section++;
+    $lines[$i] = "\n$lines[$i]" . "-" x (length($lines[$i]) - 1) . "\n";
+    }
   }
 
+print @lines;
+
 # End