114 lines
2.9 KiB
Perl
114 lines
2.9 KiB
Perl
#!/usr/bin/perl
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package IkiWiki::Plugin::linkmap;
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use warnings;
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use strict;
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use IkiWiki 3.00;
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use IPC::Open2;
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use HTML::Entities;
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sub import {
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hook(type => "getsetup", id => "linkmap", call => \&getsetup);
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hook(type => "preprocess", id => "linkmap", call => \&preprocess);
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}
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sub getsetup () {
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return
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plugin => {
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safe => 1,
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rebuild => undef,
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section => "widget",
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},
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}
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my $mapnum=0;
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sub pageescape {
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my $item = shift;
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# encoding explicitly in case ikiwiki is configured to accept <> or &
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# in file names
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my $title = pagetitle($item, 1);
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# it would not be necessary to encode *all* the html entities (<> would
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# be sufficient, &" probably a good idea), as dot accepts utf8, but it
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# isn't bad either
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$title = encode_entities($title);
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return("<$title>");
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}
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sub preprocess (@) {
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my %params=@_;
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$params{pages}="*" unless defined $params{pages};
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$mapnum++;
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my $connected=IkiWiki::yesno($params{connected});
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# Get all the items to map.
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my %mapitems = map { $_ => urlto($_, $params{destpage}) }
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pagespec_match_list($params{page}, $params{pages},
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# update when a page is added or removed, or its
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# links change
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deptype => deptype("presence", "links"));
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my $dest=$params{page}."/linkmap.png";
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# Use ikiwiki's function to create the file, this makes sure needed
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# subdirs are there and does some sanity checking.
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will_render($params{page}, $dest);
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writefile($dest, $config{destdir}, "");
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# Run dot to create the graphic and get the map data.
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my $pid;
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my $sigpipe=0;
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$SIG{PIPE}=sub { $sigpipe=1 };
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$pid=open2(*IN, *OUT, "dot -Tpng -o '$config{destdir}/$dest' -Tcmapx");
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# open2 doesn't respect "use open ':utf8'"
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binmode (IN, ':utf8');
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binmode (OUT, ':utf8');
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print OUT "digraph linkmap$mapnum {\n";
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print OUT "concentrate=true;\n";
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print OUT "charset=\"utf-8\";\n";
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print OUT "ratio=compress;\nsize=\"".($params{width}+0).", ".($params{height}+0)."\";\n"
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if defined $params{width} and defined $params{height};
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my %shown;
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my $show=sub {
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my $item=shift;
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if (! $shown{$item}) {
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print OUT pageescape($item)." [shape=box,href=\"$mapitems{$item}\"];\n";
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$shown{$item}=1;
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}
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};
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foreach my $item (keys %mapitems) {
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$show->($item) unless $connected;
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foreach my $link (map { bestlink($item, $_) } @{$links{$item}}) {
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next unless length $link and $mapitems{$link};
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foreach my $endpoint ($item, $link) {
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$show->($endpoint);
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}
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print OUT pageescape($item)." -> ".pageescape($link).";\n";
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}
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}
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print OUT "}\n";
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close OUT || error gettext("failed to run dot");
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local $/=undef;
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my $ret="<img src=\"".urlto($dest, $params{destpage}).
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"\" alt=\"".gettext("linkmap").
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"\" usemap=\"#linkmap$mapnum\" />\n".
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<IN>;
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close IN || error gettext("failed to run dot");
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waitpid $pid, 0;
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if ($?) {
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error gettext("failed to run dot");
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}
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$SIG{PIPE}="DEFAULT";
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error gettext("failed to run dot") if $sigpipe;
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return $ret;
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}
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1
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