Added getAllowChildControls and TEmptyControlList.

2 files changed, 73 insertions, 9 deletions

diff --git a/framework/Web/UI/TControl.php b/framework/Web/UI/TControl.php
index 80956312..660b1c4c 100644
--- a/framework/Web/UI/TControl.php
+++ b/framework/Web/UI/TControl.php
@@ -407,11 +407,21 @@ class TControl extends TComponent
 	public function getControls()

 	{

 		if(!isset($this->_rf[self::RF_CONTROLS]))

-			$this->_rf[self::RF_CONTROLS]=new TControlList($this);

+			$this->_rf[self::RF_CONTROLS]=$this->createControlCollection();

 		return $this->_rf[self::RF_CONTROLS];

 	}

 

 	/**

+	 * Creates a control collection object that is to be used to hold child controls

+	 * @return TControlList control collection

+	 * @see getControls

+	 */

+	protected function createControlCollection()

+	{

+		return $this->getAllowChildControls()?new TControlList($this):new TEmptyControlList($this);

+	}

+

+	/**

 	 * Checks if a control is visible.

 	 * If parent check is required, then a control is visible only if the control

 	 * and all its ancestors are visible.

@@ -883,6 +893,14 @@ class TControl extends TComponent
 	}

 

 	/**

+	 * @return boolean whether body contents are allowed for this control. Defaults to true.

+	 */

+	public function getAllowChildControls()

+	{

+		return true;

+	}

+

+	/**

 	 * This method is invoked after the control is instantiated by a template.

 	 * When this method is invoked, the control should have a valid TemplateControl

 	 * and has its properties initialized according to template configurations.

@@ -1530,6 +1548,56 @@ class TControlList extends TList
 }

 

 /**

+ * TEmptyControlList class

+ *

+ * TEmptyControlList implements an empty control list that prohibits adding

+ * controls to it. This is useful for controls that do not allow child controls.

+ *

+ * @author Qiang Xue <qiang.xue@gmail.com>

+ * @version $Revision: $  $Date: $

+ * @package System.Web.UI

+ * @since 3.0

+ */

+class TEmptyControlList extends TList

+{

+	/**

+	 * the control that owns this collection.

+	 * @var TControl

+	 */

+	private $_o;

+

+	/**

+	 * Constructor.

+	 * @param TControl the control that owns this collection.

+	 */

+	public function __construct(TControl $owner)

+	{

+		parent::__construct();

+		$this->_o=$owner;

+	}

+

+	/**

+	 * @return TControl the control that owns this collection.

+	 */

+	protected function getOwner()

+	{

+		return $this->_o;

+	}

+

+	/**

+	 * Inserts an item at the specified position.

+	 * Calling this method will always throw an exception.

+	 * @param integer the speicified position.

+	 * @param mixed new item

+	 * @throws TInvalidDataTypeException if the item to be inserted is neither a string nor a TControl.

+	 */

+	public function insertAt($index,$item)

+	{

+		throw new TNotSupportedException('emptycontrollist_addition_disallowed');

+	}

+}

+

+/**

  * INamingContainer interface.

  * INamingContainer marks a control as a naming container.

  *

diff --git a/framework/Web/UI/TTemplateManager.php b/framework/Web/UI/TTemplateManager.php
index 45884f02..abeb7466 100644
--- a/framework/Web/UI/TTemplateManager.php
+++ b/framework/Web/UI/TTemplateManager.php
@@ -252,6 +252,9 @@ class TTemplate extends TComponent implements ITemplate
 		$controls=array();

 		foreach($this->_tpl as $key=>$object)

 		{

+			$parent=isset($controls[$object[0]])?$controls[$object[0]]:$tplControl;

+			if(!$parent->getAllowChildControls())

+				continue;

 			if(isset($object[2]))	// component

 			{

 				$component=Prado::createComponent($object[1]);

@@ -270,7 +273,6 @@ class TTemplate extends TComponent implements ITemplate
 					// apply attributes

 					foreach($object[2] as $name=>$value)

 						$this->configureControl($component,$name,$value);

-					$parent=isset($controls[$object[0]])?$controls[$object[0]]:$tplControl;

 					$component->createdOnTemplate($parent);

 				}

 				else if($component instanceof TComponent)

@@ -283,17 +285,11 @@ class TTemplate extends TComponent implements ITemplate
 					}

 					foreach($object[2] as $name=>$value)

 						$this->configureComponent($component,$name,$value);

-					$parent=isset($controls[$object[0]])?$controls[$object[0]]:$tplControl;

 					$parent->addParsedObject($component);

 				}

 			}

 			else	// string

-			{

-				if(isset($controls[$object[0]]))

-					$controls[$object[0]]->addParsedObject($object[1]);

-				else

-					$tplControl->addParsedObject($object[1]);

-			}

+				$parent->addParsedObject($object[1]);

 		}

 	}