add: markdown preview

index.php

@@ -41,6 +41,9 @@
 				exit;
 			}
 
+			require 'libs/Parsedown.php';
+			$homelink = '<a accesskey="h" href="' . $root . '">home</a>&nbsp;';
+
 			$action = '';
 			if (isset($_POST['action'])) $action = $_POST['action'];
 			else if (isset($_GET['action'])) $action = $_GET['action'];
@@ -70,7 +73,15 @@
 				rename($dir . '/' . $title, $dir . '/' . $title . '.del');
 			}
 
-			if ($action == 'open')
+			if ($action == 'preview')
+			{
+				$title = $_POST['title'];
+				$content = $_POST['content'];
+				$Parsedown = new Parsedown();
+				$Parsedown->setBreaksEnabled(true);
+				echo $Parsedown->text('# ' . $title . "\r\n" . $content);
+			}
+			else if ($action == 'open')
 			{
 				$now = date("Y-m-d H.i.s", time());
 				if (!$param)
@@ -94,11 +105,11 @@
 				$length = strlen($content);
 
 				echo '<form action="index.php" method="POST">
-						<div>
-							<a accesskey="h" href="' . $root . '">home</a>
-							<select name="action">
+						<div>' . $homelink .
+						'<select name="action">
 								<option value="save">save</option>
 								<option value="delete">delete</option>
+								<option value="preview">preview</option>
 							</select>
 							<input class="title" name="title" value="' . $param . '">
 							<input type="submit" name="go" value="go" accesskey="s">
@@ -139,9 +150,8 @@
 			}
 			else
 			{
-				echo '<form action="index.php" method="GET">
-					<a accesskey="h" href="' . $root . '">home</a>
-					<select name="action">
+				echo '<form action="index.php" method="GET">' .$homelink .
+					'<select name="action">
 						<option ' . ($action == 'open' ? 'selected' : '') . ' value="open">open</option>
 						<option ' . ($action == 'filter' ? 'selected' : '') . ' value="filter">filter</option>
 						<option ' . ($action == 'search' ? 'selected' : '') . ' value="search">search</option>