IkiWiki/Plugin/map.pm

   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 3.00;
  13
  14 sub import {
  15         hook(type => "getsetup", id => "map", call => \&getsetup);
  16         hook(type => "preprocess", id => "map", call => \&preprocess);
  17 }
  18
  19 sub getsetup () {
  20         return
  21                 plugin => {
  22                         safe => 1,
  23                         rebuild => undef,
  24                 },
  25 }
  26
  27 sub preprocess (@) {
  28         my %params=@_;
  29         $params{pages}="*" unless defined $params{pages};
  30
  31         my $common_prefix;
  32
  33         # Get all the items to map.
  34         my %mapitems;
  35         foreach my $page (pagespec_match_list([keys %pagesources],
  36                                 $params{pages}, location => $params{page})) {
  37                 if (exists $params{show} &&
  38                     exists $pagestate{$page} &&
  39                     exists $pagestate{$page}{meta}{$params{show}}) {
  40                         $mapitems{$page}=$pagestate{$page}{meta}{$params{show}};
  41                 }
  42                 else {
  43                         $mapitems{$page}='';
  44                 }
  45                 # Check for a common prefix.
  46                 if (! defined $common_prefix) {
  47                         $common_prefix=$page;
  48                 }
  49                 elsif (length $common_prefix &&
  50                        $page !~ /^\Q$common_prefix\E(\/|$)/) {
  51                         my @a=split(/\//, $page);
  52                         my @b=split(/\//, $common_prefix);
  53                         $common_prefix="";
  54                         while (@a && @b && $a[0] eq $b[0]) {
  55                                 if (length $common_prefix) {
  56                                         $common_prefix.="/";
  57                                 }
  58                                 $common_prefix.=shift(@a);
  59                                 shift @b;
  60                         }
  61                 }
  62         }
  63
  64         # Common prefix should not be a page in the map.
  65         while (defined $common_prefix && length $common_prefix &&
  66                exists $mapitems{$common_prefix}) {
  67                 $common_prefix=IkiWiki::dirname($common_prefix);
  68         }
  69
  70         # Needs to update whenever a page is added or removed (or in some
  71         # cases, when its content changes, if show= is specified), so
  72         # register a dependency.
  73         add_depends($params{page}, $params{pages}, presence => ! exists $params{show});
  74         # Explicitly add all currently shown pages, to detect when pages
  75         # are removed.
  76         foreach my $item (keys %mapitems) {
  77                 add_depends($params{page}, $item, presence => ! exists $params{show});
  78         }
  79
  80         # Create the map.
  81         my $parent="";
  82         my $indent=0;
  83         my $openli=0;
  84         my $addparent="";
  85         my $map = "<div class='map'>\n";
  86
  87         # Return empty div if %mapitems is empty
  88         if (!scalar(keys %mapitems)) {
  89                 $map .= "</div>\n";
  90                 return $map;
  91         }
  92         else { # continue populating $map
  93                 $map .= "<ul>\n";
  94         }
  95
  96         foreach my $item (sort keys %mapitems) {
  97                 my @linktext = (length $mapitems{$item} ? (linktext => $mapitems{$item}) : ());
  98                 $item=~s/^\Q$common_prefix\E\///
  99                         if defined $common_prefix && length $common_prefix;
 100                 my $depth = ($item =~ tr/\//\//) + 1;
 101                 my $baseitem=IkiWiki::dirname($item);
 102                 while (length $parent && length $baseitem && $baseitem !~ /^\Q$parent\E(\/|$)/) {
 103                         $parent=IkiWiki::dirname($parent);
 104                         last if length $addparent && $baseitem =~ /^\Q$addparent\E(\/|$)/;
 105                         $addparent="";
 106                         $indent--;
 107                         $map .= "</li>\n";
 108                         if ($indent > 0) {
 109                                 $map .= "</ul>\n";
 110                         }
 111                 }
 112                 while ($depth < $indent) {
 113                         $indent--;
 114                         $map .= "</li>\n";
 115                         if ($indent > 0) {
 116                                 $map .= "</ul>\n";
 117                         }
 118                 }
 119                 my @bits=split("/", $item);
 120                 my $p="";
 121                 $p.="/".shift(@bits) for 1..$indent;
 122                 while ($depth > $indent) {
 123                         $indent++;
 124                         if ($indent > 1) {
 125                                 $map .= "<ul>\n";
 126                         }
 127                         if ($depth > $indent) {
 128                                 $p.="/".shift(@bits);
 129                                 $addparent=$p;
 130                                 $addparent=~s/^\///;
 131                                 $map .= "<li>"
 132                                         .htmllink($params{page}, $params{destpage},
 133                                                  "/".$common_prefix.$p, class => "mapparent",
 134                                                  noimageinline => 1)
 135                                         ."\n";
 136                                 $openli=1;
 137                         }
 138                         else {
 139                                 $openli=0;
 140                         }
 141                 }
 142                 $map .= "</li>\n" if $openli;
 143                 $map .= "<li>"
 144                         .htmllink($params{page}, $params{destpage},
 145                                 "/".$common_prefix."/".$item,
 146                                 @linktext,
 147                                 class => "mapitem", noimageinline => 1)
 148                         ."\n";
 149                 $openli=1;
 150                 $parent=$item;
 151         }
 152         while ($indent > 0) {
 153                 $indent--;
 154                 $map .= "</li>\n</ul>\n";
 155         }
 156         $map .= "</div>\n";
 157         return $map;
 158 }
 159
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