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#!/usr/bin/perl
package IkiWiki::Plugin::linkmap;
use warnings;
use strict;
use IkiWiki;
use IPC::Open2;
sub import { #{{{
IkiWiki::hook(type => "preprocess", id => "linkmap",
call => \&preprocess);
IkiWiki::hook(type => "format", id => "linkmap",
call => \&format);
} # }}}
my $mapnum=0;
my %maps;
sub preprocess (@) { #{{{
my %params=@_;
$params{pages}="*" unless defined $params{pages};
# Needs to update whenever a page is added or removed, so
# register a dependency.
IkiWiki::add_depends($params{page}, $params{pages});
# Can't just return the linkmap here, since the htmlscrubber
# scrubs out all <object> tags (with good reason!)
# Instead, insert a placeholder tag, which will be expanded during
# formatting.
$mapnum++;
$maps{$mapnum}=\%params;
return "<div class=\"linkmap$mapnum\"></div>";
} # }}}
sub format (@) { #{{{
my %params=@_;
$params{content}=~s/<div class=\"linkmap(\d+)"><\/div>/genmap($1)/eg;
return $params{content};
} # }}}
sub genmap ($) { #{{{
my $mapnum=shift;
return "" unless exists $maps{$mapnum};
my %params=%{$maps{$mapnum}};
# Get all the items to map.
my %mapitems = ();
foreach my $item (keys %IkiWiki::links) {
if (IkiWiki::pagespec_match($item, $params{pages})) {
my $link=IkiWiki::htmlpage($item);
$link=IkiWiki::abs2rel($link, IkiWiki::dirname($params{page}));
$mapitems{$item}=$link;
}
}
# Use ikiwiki's function to create the file, this makes sure needed
# subdirs are there and does some sanity checking.
IkiWiki::writefile("$params{page}.png", $IkiWiki::config{destdir}, "");
# Run dot to create the graphic and get the map data.
# TODO: should really add the png to renderedfiles and call
# check_overwrite, but currently renderedfiles
# only supports listing one file per page.
my $tries=10;
my $pid;
while (1) {
eval {
$pid=open2(*IN, *OUT, "dot -Tpng -o '$IkiWiki::config{destdir}/$params{page}.png' -Tcmapx");
};
last unless $@;
$tries--;
if ($tries < 1) {
return "failed to run dot: $@";
}
}
# open2 doesn't respect "use open ':utf8'"
binmode (IN, ':utf8');
binmode (OUT, ':utf8');
print OUT "digraph linkmap$mapnum {\n";
print OUT "concentrate=true;\n";
print OUT "charset=\"utf-8\";\n";
print OUT "ratio=compress;\nsize=\"".($params{width}+0).", ".($params{height}+0)."\";\n"
if defined $params{width} and defined $params{height};
foreach my $item (keys %mapitems) {
print OUT "\"$item\" [shape=box,href=\"$mapitems{$item}\"];\n";
foreach my $link (map { IkiWiki::bestlink($item, $_) } @{$IkiWiki::links{$item}}) {
print OUT "\"$item\" -> \"$link\";\n"
if $mapitems{$link};
}
}
print OUT "}\n";
close OUT;
local $/=undef;
my $ret="<object data=\"".
IkiWiki::abs2rel("$params{page}.png", IkiWiki::dirname($params{page})).
"\" type=\"image/png\" usemap=\"#linkmap$mapnum\">\n".
<IN>.
"</object>";
close IN;
waitpid $pid, 0;
return $ret;
} #}}}
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