mdw@git.distorted.org.uk Git - sw-tools/blob - perl/SWInfo.pm

   1 # -*-perl-*-
   2 #
   3 # $Id: SWInfo.pm,v 1.2 1999/08/18 17:10:07 mdw Exp $
   4 #
   5 # Read and output GNU Info files
   6 #
   7 # (c) 1999 EBI
   8 #
   9
  10 #----- Licensing notice -----------------------------------------------------
  11 #
  12 # This file is part of sw-tools.
  13 #
  14 # sw-tools is free software; you can redistribute it and/or modify
  15 # it under the terms of the GNU General Public License as published by
  16 # the Free Software Foundation; either version 2 of the License, or
  17 # (at your option) any later version.
  18 #
  19 # sw-tools is distributed in the hope that it will be useful,
  20 # but WITHOUT ANY WARRANTY; without even the implied warranty of
  21 # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  22 # GNU General Public License for more details.
  23 #
  24 # You should have received a copy of the GNU General Public License
  25 # along with sw-tools; if not, write to the Free Software Foundation,
  26 # Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
  27
  28 #----- Revision history -----------------------------------------------------
  29 #
  30 # $Log: SWInfo.pm,v $
  31 # Revision 1.2  1999/08/18 17:10:07  mdw
  32 # Slight improvements to URL and email address parsing.
  33 #
  34 # Revision 1.1  1999/07/30 18:46:37  mdw
  35 # New CGI script for browsing installed software and documentation.
  36 #
  37
  38 #----- Package preamble -----------------------------------------------------
  39
  40 package SWInfo;
  41
  42 use IO;
  43
  44 use SWConfig;
  45 use SWCGI qw(:DEFAULT :layout);
  46 use SWMan;
  47 use Info;
  48
  49 #----- Useful functions -----------------------------------------------------
  50
  51 # --- @subst(IREF, FILE, INFO)@ ---
  52 #
  53 # Given an Info reference and the name of the current Info file, returns an
  54 # HTML anchor which represents the link.
  55
  56 sub subst($$$) {
  57   my ($iref, $file, $i) = @_;
  58   my $node;
  59   my $dir;
  60   my $tail = "";
  61
  62   # --- Dig out the node and file being referred to ---
  63
  64   if ($iref =~ /:$/) {
  65     $tail = ":";
  66     $iref = $`;
  67   }
  68   my $oref = $iref;
  69   $iref =~ s/\s+/ /g;
  70   if ($iref =~ /^.+: *(.+)$/) { $iref = $1; }
  71   if ($iref =~ /(?:\(([^\)]*)\))?(.*)$/) {
  72     $file = $1 || $file;
  73     $node = $2 || "Top";
  74   } else {
  75     $node = $iref;
  76   }
  77
  78   # --- Transform it into something that won't get mangled ---
  79
  80   $node =~ s/[+&=%]|[^ -~]/sprintf("%%%02x", ord($&))/eg;
  81   $node =~ tr/ /+/;
  82
  83   ($dir = $i->{dir}) =~ s:$C{prefix}/info/?::;
  84   $dir = "&dir=$dir" if $dir;
  85
  86   return "<a href=\"$ref?act=info&file=$file&node=$node$dir\">$oref</a>$tail";
  87 }
  88
  89 #----- Actions --------------------------------------------------------------
  90
  91 sub info {
  92   my $file = $Q{file} || "dir";
  93   my $node = $Q{node} || "Top";
  94   my $dir = $Q{dir} || "";
  95   my $out;
  96
  97   # --- Read the node in ---
  98
  99   Info::setpath("$C{prefix}/info");
 100
 101   "$dir/$file" =~ m:\./: and
 102     barf("bad filename `$dir/$file'");
 103   my $i = (($dir && Info->new("$dir/$file")) ||
 104            Info->new($file))
 105     or barf("couldn't find info file `$file'");
 106   my $n = $i->node($node) or
 107     barf("info file `$file' doesn't contain node `$node'");
 108
 109   # --- Now translate the node into HTML, first line first ---
 110
 111   $n =~ s/\&/&amp;/;
 112   $n =~ s/\</&lt;/;
 113   $n =~ s/\>/&gt;/;
 114   $n =~ s/\A( [^\n]* Next:\ *) ([^,\n]*) / $1 . subst($2, $file, $i) /eix;
 115   $n =~ s/\A( [^\n]* Prev:\ *) ([^,\n]*) / $1 . subst($2, $file, $i) /eix;
 116   $n =~ s/\A( [^\n]* Up:\ *) ([^,\n]*) / $1 . subst($2, $file, $i) /eix;
 117
 118   # --- Grind through picking up any notes ---
 119
 120   $out = "";
 121
 122   for (;;) {
 123     if ($n =~ /(\*Note\s*)([^:]*: *(?:\([^\)]*\))?[^.,;:]*)([.,;:])/i) {
 124       $out .= $` . $1 . subst($2, $file, $i) . $3;
 125       $n = $';
 126     } else {
 127       last;
 128     }
 129   }
 130
 131   # --- If there's a menu then process that ---
 132
 133   if ($n =~ /\n\* *Menu:/s) {
 134     $out .= $` . $&;
 135     $n = $';
 136     for (;;) {
 137       if ($n =~ /(\n\* *)([^:]*: *(?:\([^\)]*\))?[^.,;:]*)([.,;:])/) {
 138         $out .= $` . $1 . subst($2, $file, $i) . $3;
 139         $n = $';
 140       } else {
 141         last;
 142       }
 143     }
 144   }
 145   $out .= $n;
 146
 147   $out =~ s!\b(https?|ftp|file|news):[^]&)\s]*[^]&).,\s\'\"]!<a href="$&">$&</a>!g;
 148   $out =~ s!(?:\bmailto:)?([^\s()&;:{}.,\`\"][^\s()&;:{}\`\"]*\@[^\s()&;:{}\'\"]*[^\s()&;:{}.,\'\"])!<a href="mailto:$1">$&</a>!g;
 149   $out =~ s!([-_.\w]+)\((\d+\w*)\)!SWMan::subst("$1($2)", $1, $2)!eg;
 150
 151   header("Info: ($file)$node");
 152   print("<pre>\n$out</pre>\n");
 153   footer();
 154 }
 155
 156 #----- Actions provided -----------------------------------------------------
 157
 158 $main::ACT{"info"} = \&info;
 159
 160 #----- That's all, folks ----------------------------------------------------