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<?php
/**
* TTemplateControl class file.
*
* @author Qiang Xue <qiang.xue@gmail.com>
* @link http://www.pradosoft.com/
* @copyright Copyright © 2005 PradoSoft
* @license http://www.pradosoft.com/license/
* @version $Revision: $ $Date: $
* @package System.Web.UI
*/
/**
* TTemplateControl class.
* TTemplateControl is the base class for all controls that use templates.
* By default, a control template is assumed to be in a file under the same
* directory with the control class file. They have the same file name and
* different extension name. For template file, the extension name is ".tpl".
*
* @author Qiang Xue <qiang.xue@gmail.com>
* @version $Revision: $ $Date: $
* @package System.Web.UI
* @since 3.0
*/
class TTemplateControl extends TControl implements INamingContainer
{
/**
* template file extension.
*/
const EXT_TEMPLATE='.tpl';
/**
* @var ITemplate the parsed template structure shared by the same control class
*/
protected static $_template=array();
/**
* @var ITemplate the parsed template structure specific for this control instance
*/
protected $_localTemplate=null;
/**
* @var TTemplateControl the master control if any
*/
private $_master=null;
/**
* @var string master control class name
*/
private $_masterClass='';
/**
* @var array list of TContent controls
*/
private $_contents=array();
/**
* @var array list of TContentPlaceHolder controls
*/
private $_placeholders=array();
/**
* Constructor.
* Loads template for the control class if not loaded.
* Applies template directive if any.
*/
public function __construct()
{
if(($tpl=$this->getTemplate(true))!==null)
{
foreach($tpl->getDirective() as $name=>$value)
$this->setSubProperty($name,$value);
$this->ensureChildControls();
}
}
/**
* @param boolean whether to attempt loading template if it is not loaded yet
* @return ITemplate|null the parsed template, null if none
*/
public function getTemplate($load=false)
{
if($this->_localTemplate===null)
{
$class=get_class($this);
$tpl=isset(self::$_template[$class])?self::$_template[$class]:null;
return ($tpl===null && $load)?$this->loadTemplate():$tpl;
}
else
return $this->_localTemplate;
}
/**
* Sets the parsed template.
* Note, the template will be applied to the whole control class.
* This method should only be used by framework and control developers.
* @param ITemplate the parsed template
*/
public function setTemplate($value)
{
$this->_localTemplate=$value;
}
/**
* Loads and parses the control template
* @return ITemplate the parsed template structure
*/
protected function loadTemplate()
{
Prado::trace("Loading template ".get_class($this),'System.Web.UI.TTemplateControl');
$template=$this->getService()->getTemplateManager()->getTemplateByClassName(get_class($this));
self::$_template[get_class($this)]=$template;
return $template;
}
/**
* Creates child controls.
* This method is overriden to load and instantiate control template.
* This method should only be used by framework and control developers.
*/
protected function createChildControls()
{
if($tpl=$this->getTemplate())
$tpl->instantiateIn($this);
}
/**
* Registers a content control.
* @param TContent
*/
public function registerContent(TContent $object)
{
$this->_contents[$object->getID()]=$object;
}
/**
* @return string master class name (in namespace form)
*/
public function getMasterClass()
{
return $this->_masterClass;
}
/**
* @param string master control class name (in namespace form)
*/
public function setMasterClass($value)
{
$this->_masterClass=$value;
}
/**
* @return TTemplateControl|null master control associated with this control, null if none
*/
public function getMaster()
{
return $this->_master;
}
/**
* Registers a content placeholder to this template control.
* This method should only be used by framework and control developers.
* @param string ID of the placeholder
* @param TControl control that directly enloses the placeholder
* @param integer the index in the control list of the parent control that the placeholder is at
*/
public function registerContentPlaceHolder($id,$parent,$loc)
{
$this->_placeholders[$id]=array($parent,$loc);
}
/**
* Injects all content controls (and their children) to the corresponding content placeholders.
* This method should only be used by framework and control developers.
* @param string ID of the content control
* @param TContent the content to be injected
*/
public function injectContent($id,$content)
{
if(isset($this->_placeholders[$id]))
{
list($parent,$loc)=$this->_placeholders[$id];
$parent->getControls()->insert($loc,$content);
}
}
/**
* Performs the OnInit step for the control and all its child controls.
* This method overrides the parent implementation
* by ensuring child controls are created first,
* and if master class is set, master will be applied.
* Only framework developers should use this method.
* @param TControl the naming container control
*/
protected function initRecursive($namingContainer=null)
{
$this->ensureChildControls();
if($this->_masterClass!=='')
{
$master=Prado::createComponent($this->_masterClass);
if(!($master instanceof TTemplateControl))
throw new TInvalidDataValueException('tplcontrol_required',get_class($master));
$this->_master=$master;
$this->getControls()->clear();
$this->getControls()->add($master);
$master->ensureChildControls();
foreach($this->_contents as $id=>$content)
$master->injectContent($id,$content);
}
parent::initRecursive($namingContainer);
}
}
?>
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