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<?php
/**
* @copyright Copyright (c) 2016, ownCloud, Inc.
*
* @author Georg Ehrke <georg@owncloud.com>
* @author Joas Schilling <coding@schilljs.com>
* @author Morris Jobke <hey@morrisjobke.de>
* @author Nmz <nemesiz@nmz.lt>
* @author Robin Appelman <robin@icewind.nl>
* @author Thomas Müller <thomas.mueller@tmit.eu>
*
* @license AGPL-3.0
*
* This code is free software: you can redistribute it and/or modify
* it under the terms of the GNU Affero General Public License, version 3,
* as published by the Free Software Foundation.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU Affero General Public License for more details.
*
* You should have received a copy of the GNU Affero General Public License, version 3,
* along with this program. If not, see <http://www.gnu.org/licenses/>
*
*/
namespace OC\Preview;
class TXT extends Provider {
/**
* {@inheritDoc}
*/
public function getMimeType() {
return '/text\/plain/';
}
/**
* {@inheritDoc}
*/
public function isAvailable(\OCP\Files\FileInfo $file) {
return $file->getSize() > 0;
}
/**
* {@inheritDoc}
*/
public function getThumbnail($path, $maxX, $maxY, $scalingup, $fileview) {
$content = $fileview->fopen($path, 'r');
$content = stream_get_contents($content,3000);
//don't create previews of empty text files
if(trim($content) === '') {
return false;
}
$lines = preg_split("/\r\n|\n|\r/", $content);
$fontSize = ($maxX) ? (int) ((5 / 32) * $maxX) : 5; //5px
$lineSize = ceil($fontSize * 1.25);
$image = imagecreate($maxX, $maxY);
imagecolorallocate($image, 255, 255, 255);
$textColor = imagecolorallocate($image, 0, 0, 0);
$fontFile = __DIR__;
$fontFile .= '/../../../core';
$fontFile .= '/fonts/OpenSans-Regular.ttf';
$canUseTTF = function_exists('imagettftext');
foreach($lines as $index => $line) {
$index = $index + 1;
$x = (int) 1;
$y = (int) ($index * $lineSize);
if ($canUseTTF === true) {
imagettftext($image, $fontSize, 0, $x, $y, $textColor, $fontFile, $line);
} else {
$y -= $fontSize;
imagestring($image, 1, $x, $y, $line, $textColor);
}
if(($index * $lineSize) >= $maxY) {
break;
}
}
$image = new \OC_Image($image);
return $image->valid() ? $image : false;
}
}
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