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<?php
/**
* TControl, TControlCollection, TEventParameter and INamingContainer class file
*
* @author Qiang Xue <qiang.xue@gmail.com>
* @link http://www.pradosoft.com/
* @copyright Copyright © 2005-2014 PradoSoft
* @license http://www.pradosoft.com/license/
* @package Prado\Web\UI
*/
namespace Prado\Web\UI;
/**
* TCompositeLiteral class
*
* TCompositeLiteral is used internally by {@link TTemplate} for representing
* consecutive static strings, expressions and statements.
*
* @author Qiang Xue <qiang.xue@gmail.com>
* @package Prado\Web\UI
* @since 3.0
*/
class TCompositeLiteral extends TComponent implements IRenderable, IBindable
{
const TYPE_EXPRESSION=0;
const TYPE_STATEMENTS=1;
const TYPE_DATABINDING=2;
private $_container=null;
private $_items=array();
private $_expressions=array();
private $_statements=array();
private $_bindings=array();
/**
* Constructor.
* @param array list of items to be represented by TCompositeLiteral
*/
public function __construct($items)
{
$this->_items=array();
$this->_expressions=array();
$this->_statements=array();
foreach($items as $id=>$item)
{
if(is_array($item))
{
if($item[0]===self::TYPE_EXPRESSION)
$this->_expressions[$id]=$item[1];
else if($item[0]===self::TYPE_STATEMENTS)
$this->_statements[$id]=$item[1];
else if($item[0]===self::TYPE_DATABINDING)
$this->_bindings[$id]=$item[1];
$this->_items[$id]='';
}
else
$this->_items[$id]=$item;
}
}
/**
* @return TComponent container of this component. It serves as the evaluation context of expressions and statements.
*/
public function getContainer()
{
return $this->_container;
}
/**
* @param TComponent container of this component. It serves as the evaluation context of expressions and statements.
*/
public function setContainer(TComponent $value)
{
$this->_container=$value;
}
/**
* Evaluates the expressions and/or statements in the component.
*/
public function evaluateDynamicContent()
{
$context=$this->_container===null?$this:$this->_container;
foreach($this->_expressions as $id=>$expression)
$this->_items[$id]=$context->evaluateExpression($expression);
foreach($this->_statements as $id=>$statement)
$this->_items[$id]=$context->evaluateStatements($statement);
}
/**
* Performs databindings.
* This method is required by {@link IBindable}
*/
public function dataBind()
{
$context=$this->_container===null?$this:$this->_container;
foreach($this->_bindings as $id=>$binding)
$this->_items[$id]=$context->evaluateExpression($binding);
}
/**
* Renders the content stored in this component.
* This method is required by {@link IRenderable}
* @param ITextWriter
*/
public function render($writer)
{
$writer->write(implode('',$this->_items));
}
}
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