nextcloud/lib/private/preview/txt.php

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<?php
/**
* Copyright (c) 2013 Georg Ehrke georg@ownCloud.com
* This file is licensed under the Affero General Public License version 3 or
* later.
* See the COPYING-README file.
*/
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namespace OC\Preview;
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class TXT extends Provider {
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private static $blacklist = array(
'text/calendar',
'text/vcard',
);
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public function getMimeType() {
return '/text\/.*/';
}
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public function getThumbnail($path, $maxX, $maxY, $scalingup, $fileview) {
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$mimetype = $fileview->getMimeType($path);
if(in_array($mimetype, self::$blacklist)) {
return false;
}
$content = $fileview->fopen($path, 'r');
$content = stream_get_contents($content);
//don't create previews of empty text files
if(trim($content) === '') {
return false;
}
$lines = preg_split("/\r\n|\n|\r/", $content);
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$fontSize = 5; //5px
$lineSize = ceil($fontSize * 1.25);
$image = imagecreate($maxX, $maxY);
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imagecolorallocate($image, 255, 255, 255);
$textColor = imagecolorallocate($image, 0, 0, 0);
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foreach($lines as $index => $line) {
$index = $index + 1;
$x = (int) 1;
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$y = (int) ($index * $lineSize) - $fontSize;
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imagestring($image, 1, $x, $y, $line, $textColor);
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if(($index * $lineSize) >= $maxY) {
break;
}
}
$image = new \OC_Image($image);
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return $image->valid() ? $image : false;
}
}
\OC\Preview::registerProvider('OC\Preview\TXT');
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class PHP extends TXT {
public function getMimeType() {
return '/application\/x-php/';
}
}
\OC\Preview::registerProvider('OC\Preview\PHP');
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class JavaScript extends TXT {
public function getMimeType() {
return '/application\/javascript/';
}
}
\OC\Preview::registerProvider('OC\Preview\JavaScript');