Fix max preview, some resizing and caching issues and force preview providers to resize their previews properly

* introduces a method in OC_Image which doesn't stretch images when trying to make them fit in a box
* adds the method to all key providers so that they can do their job, as expected by the Preview class
* improves the caching mechanism of Preview in order to reduce I/O and to avoid filling the available disk space
* fixes some long standing issues
* **contains mostly tests**

1 files changed, 37 insertions, 0 deletions

diff --git a/tests/lib/preview/txt.php b/tests/lib/preview/txt.php
new file mode 100644
index 00000000000..8bda86f25e3
--- /dev/null
+++ b/tests/lib/preview/txt.php
@@ -0,0 +1,37 @@
+<?php
+/**
+ * @author Olivier Paroz <owncloud@interfasys.ch>
+ *
+ * @copyright Copyright (c) 2015, ownCloud, Inc.
+ * @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 Test\Preview;
+
+class TXT extends Provider {
+
+	public function setUp() {
+		parent::setUp();
+
+		$fileName = 'lorem-big.txt';
+		$this->imgPath = $this->prepareTestFile($fileName, \OC::$SERVERROOT . '/tests/data/' . $fileName);
+		// Arbitrary width and length which won't be used to calculate the ratio
+		$this->width = 500;
+		$this->height = 200;
+		$this->provider = new \OC\Preview\TXT;
+	}
+
+}