2017-09-07 22:27:47 +02:00
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#! /usr/bin/perl
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# Copyright (C) 2015–2017 Alex Schroeder <alex@gnu.org>
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# This program is free software: you can redistribute it and/or modify it under
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# the terms of the GNU General Public License as published by the Free Software
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# Foundation, either version 3 of the License, or (at your option) any later
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# version.
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#
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# This program is distributed in the hope that it will be useful, but WITHOUT
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# ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
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# FOR A PARTICULAR PURPOSE. See the GNU General Public License for more details.
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#
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# You should have received a copy of the GNU General Public License along with
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# this program. If not, see <http://www.gnu.org/licenses/>.
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use strict;
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use v5.10;
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AddModuleDescription('ditaa.pl', 'Ditaa for Diagrams');
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our ($q, $bol, @MyRules, @KnownLocks, $TempDir);
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push (@MyRules, \&DitaaRule);
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push(@KnownLocks, 'diagram');
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sub DitaaRule {
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if ($bol && m/\G<diagram(\s+style=".*")?>\n((.*\n)+)<\/diagram>/cg) {
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return "MIME::Base64 not installed" unless eval { require MIME::Base64; };
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my $style = $1;
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my $map = UnquoteHtml($2);
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RequestLockDir('diagram', undef, undef, 1);
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WriteStringToFile("$TempDir/diagram.txt", $map);
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$ENV{LANG}='en_US.UTF-8'; # Java needs Locale to match as well!
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my $output = `ditaa "$TempDir/diagram.txt" "$TempDir/diagram.png"`;
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my $image = '';
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# not UTF-8 layer!
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if (open(IN, '<', "$TempDir/diagram.png")) {
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local $/ = undef; # Read complete files
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$image = <IN>;
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close IN;
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}
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ReleaseLockDir('diagram');
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my $data = MIME::Base64::encode_base64($image);
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my $url = "data:image/png;base64,$data";
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return CloseHtmlEnvironments()
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2020-08-12 20:53:58 +02:00
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. "<div$style>" . $q->img({-src=>$url, -alt=>$map, -loading=>'lazy'}) . "</div>";
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2017-09-07 22:27:47 +02:00
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}
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return undef;
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}
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