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; } } on> Nextcloud server, a safe home for all your data: https://github.com/nextcloud/serverwww-data
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