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- <?php
- /**
- * SPDX-FileCopyrightText: 2016-2024 Nextcloud GmbH and Nextcloud contributors
- * SPDX-FileCopyrightText: 2016 ownCloud, Inc.
- * SPDX-License-Identifier: AGPL-3.0-only
- */
- namespace OC\Preview;
- use OCP\Files\File;
- use OCP\Files\FileInfo;
- use OCP\IImage;
- class TXT extends ProviderV2 {
- /**
- * {@inheritDoc}
- */
- public function getMimeType(): string {
- return '/text\/plain/';
- }
- /**
- * {@inheritDoc}
- */
- public function isAvailable(FileInfo $file): bool {
- return $file->getSize() > 0;
- }
- /**
- * {@inheritDoc}
- */
- public function getThumbnail(File $file, int $maxX, int $maxY): ?IImage {
- if (!$this->isAvailable($file)) {
- return null;
- }
- $content = $file->fopen('r');
- if ($content === false) {
- return null;
- }
- $content = stream_get_contents($content, 3000);
- //don't create previews of empty text files
- if (trim($content) === '') {
- return null;
- }
- $lines = preg_split("/\r\n|\n|\r/", $content);
- // Define text size of text file preview
- $fontSize = $maxX ? (int) ((1 / 32) * $maxX) : 5; //5px
- $lineSize = ceil($fontSize * 1.5);
- $image = imagecreate($maxX, $maxY);
- imagecolorallocate($image, 255, 255, 255);
- $textColor = imagecolorallocate($image, 0, 0, 0);
- $fontFile = __DIR__;
- $fontFile .= '/../../../core';
- $fontFile .= '/fonts/NotoSans-Regular.ttf';
- $canUseTTF = function_exists('imagettftext');
- foreach ($lines as $index => $line) {
- $index = $index + 1;
- $x = 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;
- }
- }
- $imageObject = new \OCP\Image();
- $imageObject->setResource($image);
- return $imageObject->valid() ? $imageObject : null;
- }
- }
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