Source for file ViewState.inc
Documentation is available at ViewState.inc
require_once $config->get('sysRoot'). 'alpha/exceptions/IllegalArguementException.inc';
* A singleton class that maintains the view state in the session
* @author John Collins <dev@alphaframework.org>
* @version $Id: ViewState.inc 1453 2011-12-04 15:12:54Z johnc $
* @license http://www.opensource.org/licenses/bsd-license.php The BSD License
* @copyright Copyright (c) 2011, John Collins (founder of Alpha Framework).
* Redistribution and use in source and binary forms, with or
* without modification, are permitted provided that the
* following conditions are met:
* * Redistributions of source code must retain the above
* copyright notice, this list of conditions and the
* * Redistributions in binary form must reproduce the above
* copyright notice, this list of conditions and the
* following disclaimer in the documentation and/or other
* materials provided with the distribution.
* * Neither the name of the Alpha Framework nor the names
* of its contributors may be used to endorse or promote
* products derived from this software without specific
* prior written permission.
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND
* CONTRIBUTORS "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES,
* INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
* MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
* DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR
* CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
* LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE
* OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
* SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
* The name of the last selected tab by the user
* The amount of rows to expand the Markdown edit TextBox by
* The view state object singleton
protected static $instance;
* Private constructor means the class cannot be instantiated from elsewhere
private function __construct () {}
* Get the ViewState instance. Loads from $_SESSION if its not already in memory, otherwise
* a new instance will be returned with empty properties.
// if we don't already have the object in memory...
if (!isset (self::$instance)) {
// load from the session, otherwise return a new object
if(isset ($_SESSION['ViewState'])) {
return unserialize($_SESSION['ViewState']);
self::$instance = new ViewState();
* Get the attribute value indicated by the key
* @throws IllegalArguementException
public function get($key) {
$attribute = new ReflectionProperty(get_class($this), $key);
* Sets the attribute value indicated by the key. The ViewState instance will be serialized and saved back to the $_SESSION.
* @throws IllegalArguementException
public function set($key, $value) {
$attribute = new ReflectionProperty(get_class($this), $key);
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