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   1 #!/usr/bin/perl
   2 #
   3 # Produce a hierarchical map of links.
   4 #
   5 # by Alessandro Dotti Contra <alessandro@hyboria.org>
   6 #
   7 # Revision: 0.2
   8 package IkiWiki::Plugin::map;
   9
  10 use warnings;
  11 use strict;
  12 use IkiWiki 2.00;
  13
  14 sub import { #{{{
  15         hook(type => "preprocess", id => "map", call => \&preprocess);
  16 } # }}}
  17
  18 sub preprocess (@) { #{{{
  19         my %params=@_;
  20         $params{pages}="*" unless defined $params{pages};
  21
  22         my $common_prefix;
  23
  24         # Get all the items to map.
  25         my %mapitems;
  26         foreach my $page (keys %pagesources) {
  27                 if (pagespec_match($page, $params{pages}, location => $params{page})) {
  28                         $mapitems{$page}=1;
  29
  30                         # Check for a common prefix.
  31                         if (! defined $common_prefix) {
  32                                 $common_prefix=$page;
  33                         }
  34                         elsif (length $common_prefix &&
  35                                $page !~ /^\Q$common_prefix\E(\/|$)/) {
  36                                 my @a=split(/\//, $page);
  37                                 my @b=split(/\//, $common_prefix);
  38                                 $common_prefix="";
  39                                 while (@a && @b && $a[0] eq $b[0]) {
  40                                         if (length $common_prefix) {
  41                                                 $common_prefix.="/";
  42                                         }
  43                                         $common_prefix.=shift(@a);
  44                                         shift @b;
  45                                 }
  46                         }
  47                 }
  48         }
  49
  50         # Common prefix should not be a page in the map.
  51         while (defined $common_prefix && length $common_prefix &&
  52                exists $mapitems{$common_prefix}) {
  53                 $common_prefix=IkiWiki::dirname($common_prefix);
  54         }
  55
  56         # Needs to update whenever a page is added or removed, so
  57         # register a dependency.
  58         add_depends($params{page}, $params{pages});
  59         # Explicitly add all currently shown pages, to detect when pages
  60         # are removed.
  61         add_depends($params{page}, join(" or ", keys %mapitems));
  62
  63         # Create the map.
  64         my $parent="";
  65         my $indent=0;
  66         my $openli=0;
  67         my $dummy=0;
  68         my $map = "<div class='map'>\n<ul>\n";
  69         foreach my $item (sort keys %mapitems) {
  70                 $item=~s/^\Q$common_prefix\E\///
  71                         if defined $common_prefix && length $common_prefix;
  72                 my $depth = ($item =~ tr/\//\//) + 1;
  73                 my $baseitem=IkiWiki::dirname($item);
  74                 while (length $parent && length $baseitem && $baseitem !~ /^\Q$parent\E(\/|$)/) {
  75                         $parent=IkiWiki::dirname($parent);
  76                         last if !$dummy && length $parent && $baseitem =~ /^\Q$parent\E(\/|$)/;
  77                         $indent--;
  78                         $map .= "</li>\n";
  79                         if ($indent > 0) {
  80                                 $map .= "</ul>\n";
  81                         }
  82                 }
  83                 $dummy=0;
  84                 while ($depth < $indent) {
  85                         $indent--;
  86                         $map .= "</li>\n";
  87                         if ($indent > 0) {
  88                                 $map .= "</ul>\n";
  89                         }
  90                 }
  91                 my @bits=split("/", $item);
  92                 my $p="";
  93                 $p.="/".shift(@bits) for 1..$indent;
  94                 while ($depth > $indent) {
  95                         $indent++;
  96                         if ($indent > 1) {
  97                                 $map .= "<ul>\n";
  98                         }
  99                         if ($depth > $indent) {
 100                                 $dummy=1;
 101                                 $p.="/".shift(@bits);
 102                                 $map .= "<li>"
 103                                         .htmllink($params{page}, $params{destpage},
 104                                                  $p, class => "mapparent",
 105                                                  noimageinline => 1)
 106                                         ."\n";
 107                                 $openli=1;
 108                         }
 109                         else {
 110                                 $openli=0;
 111                         }
 112                 }
 113                 $map .= "</li>\n" if $openli;
 114                 $map .= "<li>"
 115                         .htmllink($params{page}, $params{destpage},
 116                                 "/".$common_prefix."/".$item,
 117                                 class => "mapitem", noimageinline => 1)
 118                         ."\n";
 119                 $openli=1;
 120                 $parent=$item;
 121         }
 122         while ($indent > 0) {
 123                 $indent--;
 124                 $map .= "</li>\n</ul>\n";
 125         }
 126         $map .= "</div>\n";
 127         return $map;
 128 } # }}}
 129
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