save current work state of libreoffice preview backend

lib/preview/libreoffice-cl.php

@@ -0,0 +1,129 @@
+<?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.
+ */
+namespace OC\Preview;
+
+//we need imagick to convert 
+if (extension_loaded('imagick')) {
+
+	class Office extends Provider {
+
+		private $cmd;
+
+		public function getMimeType() {
+			return null;
+		}
+
+		public function getThumbnail($path, $maxX, $maxY, $scalingup, $fileview) {
+			$this->initCmd();
+			if(is_null($this->cmd)) {
+				return false;
+			}
+
+			$abspath = $fileview->toTmpFile($path);
+
+			chdir(get_temp_dir());
+
+			$exec = 'libreoffice --headless -convert-to pdf ' . escapeshellarg($abspath);
+			exec($exec)
+			
+			//create imagick object from pdf
+			try{
+				$pdf = new \imagick($abspath . '.pdf' . '[0]');
+				$pdf->setImageFormat('jpg');
+			}catch(\Exception $e){
+				\OC_Log::write('core', $e->getmessage(), \OC_Log::ERROR);
+				return false;
+			}
+
+			$image = new \OC_Image($pdf);
+
+			unlink($abspath);
+			unlink($tmppath);
+			if (!$image->valid()) return false;
+
+			return $image;
+		}
+
+		private function initCmd() {
+			$cmd = '';
+
+			if(is_string(\OC_Config::getValue('preview_libreoffice_path', null))) {
+				$cmd = \OC_Config::getValue('preview_libreoffice_path', null);
+			}
+
+			if($cmd === '' && shell_exec('libreoffice --headless --version')) {
+				$cmd = 'libreoffice';
+			}
+
+			if($cmd === '' && shell_exec('openoffice --headless --version')) {
+				$cmd = 'openoffice';
+			}
+
+			if($cmd === '') {
+				$cmd = null;
+			}
+
+			$this->cmd = $cmd;
+		}
+	}
+}
+
+//.doc, .dot
+class MSOfficeDoc extends Office {
+
+	public function getMimeType() {
+		return '/application\/msword/';
+	}
+
+}
+
+\OC\Preview::registerProvider('OC\Preview\MSOfficeDoc');
+
+//.docm, .dotm, .xls(m), .xlt(m), .xla(m), .ppt(m), .pot(m), .pps(m), .ppa(m)
+class MSOffice2003 extends Office {
+
+	public function getMimeType() {
+		return '/application\/vnd.ms-.*/';
+	}
+
+}
+
+\OC\Preview::registerProvider('OC\Preview\MSOffice2003');
+
+//.docx, .dotx, .xlsx, .xltx, .pptx, .potx, .ppsx
+class MSOffice2007 extends Office {
+
+	public function getMimeType() {
+		return '/application\/vnd.openxmlformats-officedocument.*/';
+	}
+
+}
+
+\OC\Preview::registerProvider('OC\Preview\MSOffice2007');
+
+//.odt, .ott, .oth, .odm, .odg, .otg, .odp, .otp, .ods, .ots, .odc, .odf, .odb, .odi, .oxt
+class OpenDocument extends Office {
+	
+	public function getMimeType() {
+		return '/application\/vnd.oasis.opendocument.*/';
+	}
+
+}
+
+\OC\Preview::registerProvider('OC\Preview\OpenDocument');
+
+//.sxw, .stw, .sxc, .stc, .sxd, .std, .sxi, .sti, .sxg, .sxm
+class StarOffice extends Office {
+
+	public function getMimeType() {
+		return '/application\/vnd.sun.xml.*/';
+	}
+
+}
+
+\OC\Preview::registerProvider('OC\Preview\StarOffice');

lib/preview/office.php

@@ -5,9 +5,11 @@
  * later.
  * See the COPYING-README file.
  */
-if(shell_exec('libreoffice') || shell_exec('openoffice')) {
+//let's see if there is libreoffice or openoffice on this machine
+if(shell_exec('libreoffice --headless --version') || shell_exec('openoffice --headless --version') || is_string(\OC_Config::getValue('preview_libreoffice_path', null))) {
 	require_once('libreoffice-cl.php');
 }else{
+	//in case there isn't, use our fallback
 	require_once('msoffice.php');
 	require_once('opendocument.php');
 }