one class per file: framework/Web/UI/*.php

1 files changed, 950 insertions, 0 deletions

diff --git a/framework/Web/UI/TTemplate.php b/framework/Web/UI/TTemplate.php
new file mode 100644
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--- /dev/null
+++ b/framework/Web/UI/TTemplate.php
@@ -0,0 +1,950 @@
+<?php
+/**
+ * TTemplateManager and TTemplate class file
+ *
+ * @author Qiang Xue <qiang.xue@gmail.com>
+ * @link http://www.pradosoft.com/
+ * @copyright Copyright &copy; 2005-2014 PradoSoft
+ * @license http://www.pradosoft.com/license/
+ * @package System.Web.UI
+ */
+
+/**
+ * TTemplate implements PRADO template parsing logic.
+ * A TTemplate object represents a parsed PRADO control template.
+ * It can instantiate the template as child controls of a specified control.
+ * The template format is like HTML, with the following special tags introduced,
+ * - component tags: a component tag represents the configuration of a component.
+ * The tag name is in the format of com:ComponentType, where ComponentType is the component
+ * class name. Component tags must be well-formed. Attributes of the component tag
+ * are treated as either property initial values, event handler attachment, or regular
+ * tag attributes.
+ * - property tags: property tags are used to set large block of attribute values.
+ * The property tag name is in the format of <prop:AttributeName> where AttributeName
+ * can be a property name, an event name or a regular tag attribute name.
+ * - group subproperty tags: subproperties of a common property can be configured using
+ * <prop:MainProperty SubProperty1="Value1" SubProperty2="Value2" .../>
+ * - directive: directive specifies the property values for the template owner.
+ * It is in the format of <%@ property name-value pairs %>;
+ * - expressions: They are in the format of <%= PHP expression %> and <%% PHP statements %>
+ * - comments: There are two kinds of comments, regular HTML comments and special template comments.
+ * The former is in the format of <!-- comments -->, which will be treated as text strings.
+ * The latter is in the format of <!-- comments --!>, which will be stripped out.
+ *
+ * Tags other than the above are not required to be well-formed.
+ *
+ * A TTemplate object represents a parsed PRADO template. To instantiate the template
+ * for a particular control, call {@link instantiateIn($control)}, which
+ * will create and intialize all components specified in the template and
+ * set their parent as $control.
+ *
+ * @author Qiang Xue <qiang.xue@gmail.com>
+ * @package System.Web.UI
+ * @since 3.0
+ */
+class TTemplate extends TApplicationComponent implements ITemplate
+{
+	/**
+	 *  '<!--.*?--!>' - template comments
+		 *  '<!--.*?-->'  - HTML comments
+	 *	'<\/?com:([\w\.]+)((?:\s*[\w\.]+\s*=\s*\'.*?\'|\s*[\w\.]+\s*=\s*".*?"|\s*[\w\.]+\s*=\s*<%.*?%>)*)\s*\/?>' - component tags
+	 *	'<\/?prop:([\w\.]+)\s*>'  - property tags
+	 *	'<%@\s*((?:\s*[\w\.]+\s*=\s*\'.*?\'|\s*[\w\.]+\s*=\s*".*?")*)\s*%>'  - directives
+	 *	'<%[%#~\/\\$=\\[](.*?)%>'  - expressions
+	 *  '<prop:([\w\.]+)((?:\s*[\w\.]+=\'.*?\'|\s*[\w\.]+=".*?"|\s*[\w\.]+=<%.*?%>)*)\s*\/>' - group subproperty tags
+	 */
+	const REGEX_RULES='/<!--.*?--!>|<!---.*?--->|<\/?com:([\w\.]+)((?:\s*[\w\.]+\s*=\s*\'.*?\'|\s*[\w\.]+\s*=\s*".*?"|\s*[\w\.]+\s*=\s*<%.*?%>)*)\s*\/?>|<\/?prop:([\w\.]+)\s*>|<%@\s*((?:\s*[\w\.]+\s*=\s*\'.*?\'|\s*[\w\.]+\s*=\s*".*?")*)\s*%>|<%[%#~\/\\$=\\[](.*?)%>|<prop:([\w\.]+)((?:\s*[\w\.]+\s*=\s*\'.*?\'|\s*[\w\.]+\s*=\s*".*?"|\s*[\w\.]+\s*=\s*<%.*?%>)*)\s*\/>/msS';
+
+	/**
+	 * Different configurations of component property/event/attribute
+	 */
+	const CONFIG_DATABIND=0;
+	const CONFIG_EXPRESSION=1;
+	const CONFIG_ASSET=2;
+	const CONFIG_PARAMETER=3;
+	const CONFIG_LOCALIZATION=4;
+	const CONFIG_TEMPLATE=5;
+
+	/**
+	 * @var array list of component tags and strings
+	 */
+	private $_tpl=array();
+	/**
+	 * @var array list of directive settings
+	 */
+	private $_directive=array();
+	/**
+	 * @var string context path
+	 */
+	private $_contextPath;
+	/**
+	 * @var string template file path (if available)
+	 */
+	private $_tplFile=null;
+	/**
+	 * @var integer the line number that parsing starts from (internal use)
+	 */
+	private $_startingLine=0;
+	/**
+	 * @var string template content to be parsed
+	 */
+	private $_content;
+	/**
+	 * @var boolean whether this template is a source template
+	 */
+	private $_sourceTemplate=true;
+	/**
+	 * @var string hash code of the template
+	 */
+	private $_hashCode='';
+	private $_tplControl=null;
+	private $_includedFiles=array();
+	private $_includeAtLine=array();
+	private $_includeLines=array();
+
+
+	/**
+	 * Constructor.
+	 * The template will be parsed after construction.
+	 * @param string the template string
+	 * @param string the template context directory
+	 * @param string the template file, null if no file
+	 * @param integer the line number that parsing starts from (internal use)
+	 * @param boolean whether this template is a source template, i.e., this template is loaded from
+	 * some external storage rather than from within another template.
+	 */
+	public function __construct($template,$contextPath,$tplFile=null,$startingLine=0,$sourceTemplate=true)
+	{
+		$this->_sourceTemplate=$sourceTemplate;
+		$this->_contextPath=$contextPath;
+		$this->_tplFile=$tplFile;
+		$this->_startingLine=$startingLine;
+		$this->_content=$template;
+		$this->_hashCode=md5($template);
+		$this->parse($template);
+		$this->_content=null; // reset to save memory
+	}
+
+	/**
+	 * @return string  template file path if available, null otherwise.
+	 */
+	public function getTemplateFile()
+	{
+		return $this->_tplFile;
+	}
+
+	/**
+	 * @return boolean whether this template is a source template, i.e., this template is loaded from
+	 * some external storage rather than from within another template.
+	 */
+	public function getIsSourceTemplate()
+	{
+		return $this->_sourceTemplate;
+	}
+
+	/**
+	 * @return string context directory path
+	 */
+	public function getContextPath()
+	{
+		return $this->_contextPath;
+	}
+
+	/**
+	 * @return array name-value pairs declared in the directive
+	 */
+	public function getDirective()
+	{
+		return $this->_directive;
+	}
+
+	/**
+	 * @return string hash code that can be used to identify the template
+	 */
+	public function getHashCode()
+	{
+		return $this->_hashCode;
+	}
+
+	/**
+	 * @return array the parsed template
+	 */
+	public function &getItems()
+	{
+		return $this->_tpl;
+	}
+
+	/**
+	 * Instantiates the template.
+	 * Content in the template will be instantiated as components and text strings
+	 * and passed to the specified parent control.
+	 * @param TControl the control who owns the template
+	 * @param TControl the control who will become the root parent of the controls on the template. If null, it uses the template control.
+	 */
+	public function instantiateIn($tplControl,$parentControl=null)
+	{
+		$this->_tplControl=$tplControl;
+		if($parentControl===null)
+			$parentControl=$tplControl;
+		if(($page=$tplControl->getPage())===null)
+			$page=$this->getService()->getRequestedPage();
+		$controls=array();
+		$directChildren=array();
+		foreach($this->_tpl as $key=>$object)
+		{
+			if($object[0]===-1)
+				$parent=$parentControl;
+			else if(isset($controls[$object[0]]))
+				$parent=$controls[$object[0]];
+			else
+				continue;
+			if(isset($object[2]))	// component
+			{
+				$component=Prado::createComponent($object[1]);
+				$properties=&$object[2];
+				if($component instanceof TControl)
+				{
+					if($component instanceof TOutputCache)
+						$component->setCacheKeyPrefix($this->_hashCode.$key);
+					$component->setTemplateControl($tplControl);
+					if(isset($properties['id']))
+					{
+						if(is_array($properties['id']))
+							$properties['id']=$component->evaluateExpression($properties['id'][1]);
+						$tplControl->registerObject($properties['id'],$component);
+					}
+					if(isset($properties['skinid']))
+					{
+						if(is_array($properties['skinid']))
+							$component->setSkinID($component->evaluateExpression($properties['skinid'][1]));
+						else
+							$component->setSkinID($properties['skinid']);
+						unset($properties['skinid']);
+					}
+
+					$component->trackViewState(false);
+
+					$component->applyStyleSheetSkin($page);
+					foreach($properties as $name=>$value)
+						$this->configureControl($component,$name,$value);
+
+					$component->trackViewState(true);
+
+					if($parent===$parentControl)
+						$directChildren[]=$component;
+					else
+						$component->createdOnTemplate($parent);
+					if($component->getAllowChildControls())
+						$controls[$key]=$component;
+				}
+				else if($component instanceof TComponent)
+				{
+					$controls[$key]=$component;
+					if(isset($properties['id']))
+					{
+						if(is_array($properties['id']))
+							$properties['id']=$component->evaluateExpression($properties['id'][1]);
+						$tplControl->registerObject($properties['id'],$component);
+						if(!$component->hasProperty('id'))
+							unset($properties['id']);
+					}
+					foreach($properties as $name=>$value)
+						$this->configureComponent($component,$name,$value);
+					if($parent===$parentControl)
+						$directChildren[]=$component;
+					else
+						$component->createdOnTemplate($parent);
+				}
+			}
+			else
+			{
+				if($object[1] instanceof TCompositeLiteral)
+				{
+					// need to clone a new object because the one in template is reused
+					$o=clone $object[1];
+					$o->setContainer($tplControl);
+					if($parent===$parentControl)
+						$directChildren[]=$o;
+					else
+						$parent->addParsedObject($o);
+				}
+				else
+				{
+					if($parent===$parentControl)
+						$directChildren[]=$object[1];
+					else
+						$parent->addParsedObject($object[1]);
+				}
+			}
+		}
+		// delay setting parent till now because the parent may cause
+		// the child to do lifecycle catchup which may cause problem
+		// if the child needs its own child controls.
+		foreach($directChildren as $control)
+		{
+			if($control instanceof TComponent)
+				$control->createdOnTemplate($parentControl);
+			else
+				$parentControl->addParsedObject($control);
+		}
+	}
+
+	/**
+	 * Configures a property/event of a control.
+	 * @param TControl control to be configured
+	 * @param string property name
+	 * @param mixed property initial value
+	 */
+	protected function configureControl($control,$name,$value)
+	{
+		if(strncasecmp($name,'on',2)===0)		// is an event
+			$this->configureEvent($control,$name,$value,$control);
+		else if(($pos=strrpos($name,'.'))===false)	// is a simple property or custom attribute
+			$this->configureProperty($control,$name,$value);
+		else	// is a subproperty
+			$this->configureSubProperty($control,$name,$value);
+	}
+
+	/**
+	 * Configures a property of a non-control component.
+	 * @param TComponent component to be configured
+	 * @param string property name
+	 * @param mixed property initial value
+	 */
+	protected function configureComponent($component,$name,$value)
+	{
+		if(strpos($name,'.')===false)	// is a simple property or custom attribute
+			$this->configureProperty($component,$name,$value);
+		else	// is a subproperty
+			$this->configureSubProperty($component,$name,$value);
+	}
+
+	/**
+	 * Configures an event for a control.
+	 * @param TControl control to be configured
+	 * @param string event name
+	 * @param string event handler
+	 * @param TControl context control
+	 */
+	protected function configureEvent($control,$name,$value,$contextControl)
+	{
+		if(strpos($value,'.')===false)
+			$control->attachEventHandler($name,array($contextControl,'TemplateControl.'.$value));
+		else
+			$control->attachEventHandler($name,array($contextControl,$value));
+	}
+
+	/**
+	 * Configures a simple property for a component.
+	 * @param TComponent component to be configured
+	 * @param string property name
+	 * @param mixed property initial value
+	 */
+	protected function configureProperty($component,$name,$value)
+	{
+		if(is_array($value))
+		{
+			switch($value[0])
+			{
+				case self::CONFIG_DATABIND:
+					$component->bindProperty($name,$value[1]);
+					break;
+				case self::CONFIG_EXPRESSION:
+					if($component instanceof TControl)
+						$component->autoBindProperty($name,$value[1]);
+					else
+					{
+						$setter='set'.$name;
+						$component->$setter($this->_tplControl->evaluateExpression($value[1]));
+					}
+					break;
+				case self::CONFIG_TEMPLATE:
+					$setter='set'.$name;
+					$component->$setter($value[1]);
+					break;
+				case self::CONFIG_ASSET:		// asset URL
+					$setter='set'.$name;
+					$url=$this->publishFilePath($this->_contextPath.DIRECTORY_SEPARATOR.$value[1]);
+					$component->$setter($url);
+					break;
+				case self::CONFIG_PARAMETER:		// application parameter
+					$setter='set'.$name;
+					$component->$setter($this->getApplication()->getParameters()->itemAt($value[1]));
+					break;
+				case self::CONFIG_LOCALIZATION:
+					$setter='set'.$name;
+					$component->$setter(Prado::localize($value[1]));
+					break;
+				default:	// an error if reaching here
+					throw new TConfigurationException('template_tag_unexpected',$name,$value[1]);
+					break;
+			}
+		}
+		else
+		{
+			if (substr($name,0,2)=='js')
+				if ($value and !($value instanceof TJavaScriptLiteral))
+					$value = new TJavaScriptLiteral($value);
+			$setter='set'.$name;
+			$component->$setter($value);
+		}
+	}
+
+	/**
+	 * Configures a subproperty for a component.
+	 * @param TComponent component to be configured
+	 * @param string subproperty name
+	 * @param mixed subproperty initial value
+	 */
+	protected function configureSubProperty($component,$name,$value)
+	{
+		if(is_array($value))
+		{
+			switch($value[0])
+			{
+				case self::CONFIG_DATABIND:		// databinding
+					$component->bindProperty($name,$value[1]);
+					break;
+				case self::CONFIG_EXPRESSION:		// expression
+					if($component instanceof TControl)
+						$component->autoBindProperty($name,$value[1]);
+					else
+						$component->setSubProperty($name,$this->_tplControl->evaluateExpression($value[1]));
+					break;
+				case self::CONFIG_TEMPLATE:
+					$component->setSubProperty($name,$value[1]);
+					break;
+				case self::CONFIG_ASSET:		// asset URL
+					$url=$this->publishFilePath($this->_contextPath.DIRECTORY_SEPARATOR.$value[1]);
+					$component->setSubProperty($name,$url);
+					break;
+				case self::CONFIG_PARAMETER:		// application parameter
+					$component->setSubProperty($name,$this->getApplication()->getParameters()->itemAt($value[1]));
+					break;
+				case self::CONFIG_LOCALIZATION:
+					$component->setSubProperty($name,Prado::localize($value[1]));
+					break;
+				default:	// an error if reaching here
+					throw new TConfigurationException('template_tag_unexpected',$name,$value[1]);
+					break;
+			}
+		}
+		else
+			$component->setSubProperty($name,$value);
+	}
+
+	/**
+	 * Parses a template string.
+	 *
+	 * This template parser recognizes five types of data:
+	 * regular string, well-formed component tags, well-formed property tags, directives, and expressions.
+	 *
+	 * The parsing result is returned as an array. Each array element can be of three types:
+	 * - a string, 0: container index; 1: string content;
+	 * - a component tag, 0: container index; 1: component type; 2: attributes (name=>value pairs)
+	 * If a directive is found in the template, it will be parsed and can be
+	 * retrieved via {@link getDirective}, which returns an array consisting of
+	 * name-value pairs in the directive.
+	 *
+	 * Note, attribute names are treated as case-insensitive and will be turned into lower cases.
+	 * Component and directive types are case-sensitive.
+	 * Container index is the index to the array element that stores the container object.
+	 * If an object has no container, its container index is -1.
+	 *
+	 * @param string the template string
+	 * @throws TConfigurationException if a parsing error is encountered
+	 */
+	protected function parse($input)
+	{
+		$input=$this->preprocess($input);
+		$tpl=&$this->_tpl;
+		$n=preg_match_all(self::REGEX_RULES,$input,$matches,PREG_SET_ORDER|PREG_OFFSET_CAPTURE);
+		$expectPropEnd=false;
+		$textStart=0;
+				$stack=array();
+		$container=-1;
+		$matchEnd=0;
+		$c=0;
+		$this->_directive=null;
+		try
+		{
+			for($i=0;$i<$n;++$i)
+			{
+				$match=&$matches[$i];
+				$str=$match[0][0];
+				$matchStart=$match[0][1];
+				$matchEnd=$matchStart+strlen($str)-1;
+				if(strpos($str,'<com:')===0)	// opening component tag
+				{
+					if($expectPropEnd)
+						continue;
+					if($matchStart>$textStart)
+						$tpl[$c++]=array($container,substr($input,$textStart,$matchStart-$textStart));
+					$textStart=$matchEnd+1;
+					$type=$match[1][0];
+					$attributes=$this->parseAttributes($match[2][0],$match[2][1]);
+					$this->validateAttributes($type,$attributes);
+					$tpl[$c++]=array($container,$type,$attributes);
+					if($str[strlen($str)-2]!=='/')  // open tag
+					{
+						$stack[] = $type;
+						$container=$c-1;
+					}
+				}
+				else if(strpos($str,'</com:')===0)	// closing component tag
+				{
+					if($expectPropEnd)
+						continue;
+					if($matchStart>$textStart)
+						$tpl[$c++]=array($container,substr($input,$textStart,$matchStart-$textStart));
+					$textStart=$matchEnd+1;
+					$type=$match[1][0];
+
+					if(empty($stack))
+						throw new TConfigurationException('template_closingtag_unexpected',"</com:$type>");
+
+					$name=array_pop($stack);
+					if($name!==$type)
+					{
+						$tag=$name[0]==='@' ? '</prop:'.substr($name,1).'>' : "</com:$name>";
+						throw new TConfigurationException('template_closingtag_expected',$tag);
+					}
+					$container=$tpl[$container][0];
+				}
+				else if(strpos($str,'<%@')===0)	// directive
+				{
+					if($expectPropEnd)
+						continue;
+					if($matchStart>$textStart)
+						$tpl[$c++]=array($container,substr($input,$textStart,$matchStart-$textStart));
+					$textStart=$matchEnd+1;
+					if(isset($tpl[0]) || $this->_directive!==null)
+						throw new TConfigurationException('template_directive_nonunique');
+					$this->_directive=$this->parseAttributes($match[4][0],$match[4][1]);
+				}
+				else if(strpos($str,'<%')===0)	// expression
+				{
+					if($expectPropEnd)
+						continue;
+					if($matchStart>$textStart)
+						$tpl[$c++]=array($container,substr($input,$textStart,$matchStart-$textStart));
+					$textStart=$matchEnd+1;
+					$literal=trim($match[5][0]);
+					if($str[2]==='=')	// expression
+						$tpl[$c++]=array($container,array(TCompositeLiteral::TYPE_EXPRESSION,$literal));
+					else if($str[2]==='%')  // statements
+						$tpl[$c++]=array($container,array(TCompositeLiteral::TYPE_STATEMENTS,$literal));
+					else if($str[2]==='#')
+						$tpl[$c++]=array($container,array(TCompositeLiteral::TYPE_DATABINDING,$literal));
+					else if($str[2]==='$')
+						$tpl[$c++]=array($container,array(TCompositeLiteral::TYPE_EXPRESSION,"\$this->getApplication()->getParameters()->itemAt('$literal')"));
+					else if($str[2]==='~')
+						$tpl[$c++]=array($container,array(TCompositeLiteral::TYPE_EXPRESSION,"\$this->publishFilePath('$this->_contextPath/$literal')"));
+					else if($str[2]==='/')
+						$tpl[$c++]=array($container,array(TCompositeLiteral::TYPE_EXPRESSION,"rtrim(dirname(\$this->getApplication()->getRequest()->getApplicationUrl()), '/').'/$literal'"));
+					else if($str[2]==='[')
+					{
+						$literal=strtr(trim(substr($literal,0,strlen($literal)-1)),array("'"=>"\'","\\"=>"\\\\"));
+						$tpl[$c++]=array($container,array(TCompositeLiteral::TYPE_EXPRESSION,"Prado::localize('$literal')"));
+					}
+				}
+				else if(strpos($str,'<prop:')===0)	// opening property
+				{
+					if(strrpos($str,'/>')===strlen($str)-2)  //subproperties
+					{
+						if($expectPropEnd)
+							continue;
+						if($matchStart>$textStart)
+							$tpl[$c++]=array($container,substr($input,$textStart,$matchStart-$textStart));
+						$textStart=$matchEnd+1;
+						$prop=strtolower($match[6][0]);
+						$attrs=$this->parseAttributes($match[7][0],$match[7][1]);
+						$attributes=array();
+						foreach($attrs as $name=>$value)
+							$attributes[$prop.'.'.$name]=$value;
+						$type=$tpl[$container][1];
+						$this->validateAttributes($type,$attributes);
+						foreach($attributes as $name=>$value)
+						{
+							if(isset($tpl[$container][2][$name]))
+								throw new TConfigurationException('template_property_duplicated',$name);
+							$tpl[$container][2][$name]=$value;
+						}
+					}
+					else  // regular property
+					{
+						$prop=strtolower($match[3][0]);
+						$stack[] = '@'.$prop;
+						if(!$expectPropEnd)
+						{
+							if($matchStart>$textStart)
+								$tpl[$c++]=array($container,substr($input,$textStart,$matchStart-$textStart));
+							$textStart=$matchEnd+1;
+							$expectPropEnd=true;
+						}
+					}
+				}
+				else if(strpos($str,'</prop:')===0)	// closing property
+				{
+					$prop=strtolower($match[3][0]);
+					if(empty($stack))
+						throw new TConfigurationException('template_closingtag_unexpected',"</prop:$prop>");
+					$name=array_pop($stack);
+					if($name!=='@'.$prop)
+					{
+						$tag=$name[0]==='@' ? '</prop:'.substr($name,1).'>' : "</com:$name>";
+						throw new TConfigurationException('template_closingtag_expected',$tag);
+					}
+					if(($last=count($stack))<1 || $stack[$last-1][0]!=='@')
+					{
+						if($matchStart>$textStart)
+						{
+							$value=substr($input,$textStart,$matchStart-$textStart);
+							if(substr($prop,-8,8)==='template')
+								$value=$this->parseTemplateProperty($value,$textStart);
+							else
+								$value=$this->parseAttribute($value);
+							if($container>=0)
+							{
+								$type=$tpl[$container][1];
+								$this->validateAttributes($type,array($prop=>$value));
+								if(isset($tpl[$container][2][$prop]))
+									throw new TConfigurationException('template_property_duplicated',$prop);
+								$tpl[$container][2][$prop]=$value;
+							}
+							else	// a property for the template control
+								$this->_directive[$prop]=$value;
+							$textStart=$matchEnd+1;
+						}
+						$expectPropEnd=false;
+					}
+				}
+				else if(strpos($str,'<!--')===0)	// comments
+				{
+					if($expectPropEnd)
+						throw new TConfigurationException('template_comments_forbidden');
+					if($matchStart>$textStart)
+						$tpl[$c++]=array($container,substr($input,$textStart,$matchStart-$textStart));
+					$textStart=$matchEnd+1;
+				}
+				else
+					throw new TConfigurationException('template_matching_unexpected',$match);
+			}
+			if(!empty($stack))
+			{
+				$name=array_pop($stack);
+				$tag=$name[0]==='@' ? '</prop:'.substr($name,1).'>' : "</com:$name>";
+				throw new TConfigurationException('template_closingtag_expected',$tag);
+			}
+			if($textStart<strlen($input))
+				$tpl[$c++]=array($container,substr($input,$textStart));
+		}
+		catch(Exception $e)
+		{
+			if(($e instanceof TException) && ($e instanceof TTemplateException))
+				throw $e;
+			if($matchEnd===0)
+				$line=$this->_startingLine+1;
+			else
+				$line=$this->_startingLine+count(explode("\n",substr($input,0,$matchEnd+1)));
+			$this->handleException($e,$line,$input);
+		}
+
+		if($this->_directive===null)
+			$this->_directive=array();
+
+		// optimization by merging consecutive strings, expressions, statements and bindings
+		$objects=array();
+		$parent=null;
+		$merged=array();
+		foreach($tpl as $id=>$object)
+		{
+			if(isset($object[2]) || $object[0]!==$parent)
+			{
+				if($parent!==null)
+				{
+					if(count($merged[1])===1 && is_string($merged[1][0]))
+						$objects[$id-1]=array($merged[0],$merged[1][0]);
+					else
+						$objects[$id-1]=array($merged[0],new TCompositeLiteral($merged[1]));
+				}
+				if(isset($object[2]))
+				{
+					$parent=null;
+					$objects[$id]=$object;
+				}
+				else
+				{
+					$parent=$object[0];
+					$merged=array($parent,array($object[1]));
+				}
+			}
+			else
+				$merged[1][]=$object[1];
+		}
+		if($parent!==null)
+		{
+			if(count($merged[1])===1 && is_string($merged[1][0]))
+				$objects[$id]=array($merged[0],$merged[1][0]);
+			else
+				$objects[$id]=array($merged[0],new TCompositeLiteral($merged[1]));
+		}
+		$tpl=$objects;
+		return $objects;
+	}
+
+	/**
+	 * Parses the attributes of a tag from a string.
+	 * @param string the string to be parsed.
+	 * @return array attribute values indexed by names.
+	 */
+	protected function parseAttributes($str,$offset)
+	{
+		if($str==='')
+			return array();
+		$pattern='/([\w\.\-]+)\s*=\s*(\'.*?\'|".*?"|<%.*?%>)/msS';
+		$attributes=array();
+		$n=preg_match_all($pattern,$str,$matches,PREG_SET_ORDER|PREG_OFFSET_CAPTURE);
+		for($i=0;$i<$n;++$i)
+		{
+			$match=&$matches[$i];
+			$name=strtolower($match[1][0]);
+			if(isset($attributes[$name]))
+				throw new TConfigurationException('template_property_duplicated',$name);
+			$value=$match[2][0];
+			if(substr($name,-8,8)==='template')
+			{
+				if($value[0]==='\'' || $value[0]==='"')
+					$attributes[$name]=$this->parseTemplateProperty(substr($value,1,strlen($value)-2),$match[2][1]+1);
+				else
+					$attributes[$name]=$this->parseTemplateProperty($value,$match[2][1]);
+			}
+			else
+			{
+				if($value[0]==='\'' || $value[0]==='"')
+					$attributes[$name]=$this->parseAttribute(substr($value,1,strlen($value)-2));
+				else
+					$attributes[$name]=$this->parseAttribute($value);
+			}
+		}
+		return $attributes;
+	}
+
+	protected function parseTemplateProperty($content,$offset)
+	{
+		$line=$this->_startingLine+count(explode("\n",substr($this->_content,0,$offset)))-1;
+		return array(self::CONFIG_TEMPLATE,new TTemplate($content,$this->_contextPath,$this->_tplFile,$line,false));
+	}
+
+	/**
+	 * Parses a single attribute.
+	 * @param string the string to be parsed.
+	 * @return array attribute initialization
+	 */
+	protected function parseAttribute($value)
+	{
+		if(($n=preg_match_all('/<%[#=].*?%>/msS',$value,$matches,PREG_OFFSET_CAPTURE))>0)
+		{
+			$isDataBind=false;
+			$textStart=0;
+			$expr='';
+			for($i=0;$i<$n;++$i)
+			{
+				$match=$matches[0][$i];
+				$token=$match[0];
+				$offset=$match[1];
+				$length=strlen($token);
+				if($token[2]==='#')
+					$isDataBind=true;
+				if($offset>$textStart)
+					$expr.=".'".strtr(substr($value,$textStart,$offset-$textStart),array("'"=>"\\'","\\"=>"\\\\"))."'";
+				$expr.='.('.substr($token,3,$length-5).')';
+				$textStart=$offset+$length;
+			}
+			$length=strlen($value);
+			if($length>$textStart)
+				$expr.=".'".strtr(substr($value,$textStart,$length-$textStart),array("'"=>"\\'","\\"=>"\\\\"))."'";
+			if($isDataBind)
+				return array(self::CONFIG_DATABIND,ltrim($expr,'.'));
+			else
+				return array(self::CONFIG_EXPRESSION,ltrim($expr,'.'));
+		}
+		else if(preg_match('/\\s*(<%~.*?%>|<%\\$.*?%>|<%\\[.*?\\]%>|<%\/.*?%>)\\s*/msS',$value,$matches) && $matches[0]===$value)
+		{
+			$value=$matches[1];
+			if($value[2]==='~')
+				return array(self::CONFIG_ASSET,trim(substr($value,3,strlen($value)-5)));
+			elseif($value[2]==='[')
+				return array(self::CONFIG_LOCALIZATION,trim(substr($value,3,strlen($value)-6)));
+			elseif($value[2]==='$')
+				return array(self::CONFIG_PARAMETER,trim(substr($value,3,strlen($value)-5)));
+			elseif($value[2]==='/') {
+				$literal = trim(substr($value,3,strlen($value)-5));
+				return array(self::CONFIG_EXPRESSION,"rtrim(dirname(\$this->getApplication()->getRequest()->getApplicationUrl()), '/').'/$literal'");
+			}
+		}
+		else
+			return $value;
+	}
+
+	protected function validateAttributes($type,$attributes)
+	{
+		Prado::using($type);
+		if(($pos=strrpos($type,'.'))!==false)
+			$className=substr($type,$pos+1);
+		else
+			$className=$type;
+		$class=new ReflectionClass($className);
+		if(is_subclass_of($className,'TControl') || $className==='TControl')
+		{
+			foreach($attributes as $name=>$att)
+			{
+				if(($pos=strpos($name,'.'))!==false)
+				{
+					// a subproperty, so the first segment must be readable
+					$subname=substr($name,0,$pos);
+					if(!$class->hasMethod('get'.$subname))
+						throw new TConfigurationException('template_property_unknown',$type,$subname);
+				}
+				else if(strncasecmp($name,'on',2)===0)
+				{
+					// an event
+					if(!$class->hasMethod($name))
+						throw new TConfigurationException('template_event_unknown',$type,$name);
+					else if(!is_string($att))
+						throw new TConfigurationException('template_eventhandler_invalid',$type,$name);
+				}
+				else
+				{
+					// a simple property
+					if (! ($class->hasMethod('set'.$name) || $class->hasMethod('setjs'.$name)) )
+					{
+						if ($class->hasMethod('get'.$name) || $class->hasMethod('getjs'.$name))
+							throw new TConfigurationException('template_property_readonly',$type,$name);
+						else
+							throw new TConfigurationException('template_property_unknown',$type,$name);
+					}
+					else if(is_array($att) && $att[0]!==self::CONFIG_EXPRESSION)
+					{
+						if(strcasecmp($name,'id')===0)
+							throw new TConfigurationException('template_controlid_invalid',$type);
+						else if(strcasecmp($name,'skinid')===0)
+							throw new TConfigurationException('template_controlskinid_invalid',$type);
+					}
+				}
+			}
+		}
+		else if(is_subclass_of($className,'TComponent') || $className==='TComponent')
+		{
+			foreach($attributes as $name=>$att)
+			{
+				if(is_array($att) && ($att[0]===self::CONFIG_DATABIND))
+					throw new TConfigurationException('template_databind_forbidden',$type,$name);
+				if(($pos=strpos($name,'.'))!==false)
+				{
+					// a subproperty, so the first segment must be readable
+					$subname=substr($name,0,$pos);
+					if(!$class->hasMethod('get'.$subname))
+						throw new TConfigurationException('template_property_unknown',$type,$subname);
+				}
+				else if(strncasecmp($name,'on',2)===0)
+					throw new TConfigurationException('template_event_forbidden',$type,$name);
+				else
+				{
+					// id is still alowed for TComponent, even if id property doesn't exist
+					if(strcasecmp($name,'id')!==0 && !$class->hasMethod('set'.$name))
+					{
+						if($class->hasMethod('get'.$name))
+							throw new TConfigurationException('template_property_readonly',$type,$name);
+						else
+							throw new TConfigurationException('template_property_unknown',$type,$name);
+					}
+				}
+			}
+		}
+		else
+			throw new TConfigurationException('template_component_required',$type);
+	}
+
+	/**
+	 * @return array list of included external template files
+	 */
+	public function getIncludedFiles()
+	{
+		return $this->_includedFiles;
+	}
+
+	/**
+	 * Handles template parsing exception.
+	 * This method rethrows the exception caught during template parsing.
+	 * It adjusts the error location by giving out correct error line number and source file.
+	 * @param Exception template exception
+	 * @param int line number
+	 * @param string template string if no source file is used
+	 */
+	protected function handleException($e,$line,$input=null)
+	{
+		$srcFile=$this->_tplFile;
+
+		if(($n=count($this->_includedFiles))>0) // need to adjust error row number and file name
+		{
+			for($i=$n-1;$i>=0;--$i)
+			{
+				if($this->_includeAtLine[$i]<=$line)
+				{
+					if($line<$this->_includeAtLine[$i]+$this->_includeLines[$i])
+					{
+						$line=$line-$this->_includeAtLine[$i]+1;
+						$srcFile=$this->_includedFiles[$i];
+						break;
+					}
+					else
+						$line=$line-$this->_includeLines[$i]+1;
+				}
+			}
+		}
+		$exception=new TTemplateException('template_format_invalid',$e->getMessage());
+		$exception->setLineNumber($line);
+		if(!empty($srcFile))
+			$exception->setTemplateFile($srcFile);
+		else
+			$exception->setTemplateSource($input);
+		throw $exception;
+	}
+
+	/**
+	 * Preprocesses the template string by including external templates
+	 * @param string template string
+	 * @return string expanded template string
+	 */
+	protected function preprocess($input)
+	{
+		if($n=preg_match_all('/<%include(.*?)%>/',$input,$matches,PREG_SET_ORDER|PREG_OFFSET_CAPTURE))
+		{
+			for($i=0;$i<$n;++$i)
+			{
+				$filePath=Prado::getPathOfNamespace(trim($matches[$i][1][0]),TTemplateManager::TEMPLATE_FILE_EXT);
+				if($filePath!==null && is_file($filePath))
+					$this->_includedFiles[]=$filePath;
+				else
+				{
+					$errorLine=count(explode("\n",substr($input,0,$matches[$i][0][1]+1)));
+					$this->handleException(new TConfigurationException('template_include_invalid',trim($matches[$i][1][0])),$errorLine,$input);
+				}
+			}
+			$base=0;
+			for($i=0;$i<$n;++$i)
+			{
+				$ext=file_get_contents($this->_includedFiles[$i]);
+				$length=strlen($matches[$i][0][0]);
+				$offset=$base+$matches[$i][0][1];
+				$this->_includeAtLine[$i]=count(explode("\n",substr($input,0,$offset)));
+				$this->_includeLines[$i]=count(explode("\n",$ext));
+				$input=substr_replace($input,$ext,$offset,$length);
+				$base+=strlen($ext)-$length;
+			}
+		}
+
+		return $input;
+	}
+}
\ No newline at end of file