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<?php
/**
 * CPortlet class file.
 *
 * @author Qiang Xue <qiang.xue@gmail.com>
 * @link http://www.yiiframework.com/
 * @copyright 2008-2013 Yii Software LLC
 * @license http://www.yiiframework.com/license/
 */

/**
 * CPortlet is the base class for portlet widgets.
 *
 * A portlet displays a fragment of content, usually in terms of a block
 * on the side bars of a Web page.
 *
 * To specify the content of the portlet, override the {@link renderContent}
 * method, or insert the content code between the {@link CController::beginWidget}
 * and {@link CController::endWidget} calls. For example,
 *
 * <pre>
 * <?php $this->beginWidget('zii.widgets.CPortlet'); ?>
 *     ...insert content here...
 * <?php $this->endWidget(); ?>
 * </pre>
 *
 * A portlet also has an optional {@link title}. One may also override {@link renderDecoration}
 * to further customize the decorative display of a portlet (e.g. adding min/max buttons).
 *
 * @author Qiang Xue <qiang.xue@gmail.com>
 * @package zii.widgets
 * @since 1.1
 */
class CPortlet extends CWidget
{
	/**
	 * @var string the tag name for the portlet container tag. Defaults to 'div'.
	 */
	public $tagName='div';
	/**
	 * @var array the HTML attributes for the portlet container tag.
	 */
	public $htmlOptions=array('class'=>'portlet');
	/**
	 * @var string the title of the portlet. Defaults to null.
	 * When this is not set, Decoration will not be displayed.
	 * Note that the title will not be HTML-encoded when rendering.
	 */
	public $title;
	/**
	 * @var string the CSS class for the decoration container tag. Defaults to 'portlet-decoration'.
	 */
	public $decorationCssClass='portlet-decoration';
	/**
	 * @var string the CSS class for the portlet title tag. Defaults to 'portlet-title'.
	 */
	public $titleCssClass='portlet-title';
	/**
	 * @var string the CSS class for the content container tag. Defaults to 'portlet-content'.
	 */
	public $contentCssClass='portlet-content';
	/**
	 * @var boolean whether to hide the portlet when the body content is empty. Defaults to true.
	 * @since 1.1.4
	 */
	public $hideOnEmpty=true;

private $_openTag;

/**
	 * Initializes the widget.
	 * This renders the open tags needed by the portlet.
	 * It also renders the decoration, if any.
	 */
	public function init()
	{
		ob_start();
		ob_implicit_flush(false);

if(isset($this->htmlOptions['id']))
			$this->id=$this->htmlOptions['id'];
		else
			$this->htmlOptions['id']=$this->id;
		echo CHtml::openTag($this->tagName,$this->htmlOptions)."\n";
		$this->renderDecoration();
		echo "<div class=\"{$this->contentCssClass}\">\n";

$this->_openTag=ob_get_contents();
		ob_clean();
	}

/**
	 * Renders the content of the portlet.
	 */
	public function run()
	{
		$this->renderContent();
		$content=ob_get_clean();
		if($this->hideOnEmpty && trim($content)==='')
			return;
		echo $this->_openTag;
		echo $content;
		echo "</div>\n";
		echo CHtml::closeTag($this->tagName);
	}

/**
	 * Renders the decoration for the portlet.
	 * The default implementation will render the title if it is set.
	 */
	protected function renderDecoration()
	{
		if($this->title!==null)
		{
			echo "<div class=\"{$this->decorationCssClass}\">\n";
			echo "<div class=\"{$this->titleCssClass}\">{$this->title}</div>\n";
			echo "</div>\n";
		}
	}

/**
	 * Renders the content of the portlet.
	 * Child classes should override this method to render the actual content.
	 */
	protected function renderContent()
	{
	}
}