diff options
Diffstat (limited to 'framework/Web/UI/TTemplate.php')
| -rw-r--r-- | framework/Web/UI/TTemplate.php | 494 |
1 files changed, 494 insertions, 0 deletions
diff --git a/framework/Web/UI/TTemplate.php b/framework/Web/UI/TTemplate.php new file mode 100644 index 00000000..df9bf813 --- /dev/null +++ b/framework/Web/UI/TTemplate.php @@ -0,0 +1,494 @@ +<?php
+/**
+ * TTemplate 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
+ */
+
+/**
+ * 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.
+ * - directive: directive specifies the property values for the template owner.
+ * It is in the format of <% properyt name-value pairs %>
+ * - expressions: expressions are shorthand of {@link TExpression} and {@link TStatements}
+ * controls. They are in the formate 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 are not required to be well-formed.
+ *
+ * @author Qiang Xue <qiang.xue@gmail.com>
+ * @version $Revision: $ $Date: $
+ * @package System.Web.UI
+ * @since 3.0
+ */
+class TTemplate extends TComponent implements ITemplate
+{
+ /**
+ * '<!.*?!>' - template comments
+ * '<!--.*?-->' - HTML comments
+ * '<\/?com:([\w\.]+)((?:\s*[\w\.]+=\'.*?\'|\s*[\w\.]+=".*?"|\s*[\w\.]+=<%.*?%>)*)\s*\/?>' - component tags
+ * '<\/?prop:([\w\.]+)\s*>' - property tags
+ * '<%@\s*(\w+)((?:\s*[\w\.]+=\'.*?\'|\s*[\w\.]+=".*?")*)\s*%>' - directives
+ * '<%=?(.*?)%>' - expressions
+ */
+ const REGEX_RULES='/<!.*?!>|<!--.*?-->|<\/?com:([\w\.]+)((?:\s*[\w\.]+=\'.*?\'|\s*[\w\.]+=".*?"|\s*[\w\.]+=<%.*?%>)*)\s*\/?>|<\/?prop:([\w\.]+)\s*>|<%@\s*((?:\s*[\w\.]+=\'.*?\'|\s*[\w\.]+=".*?")*)\s*%>|<%=?(.*?)%>/msS';
+
+ /**
+ * @var array list of component tags and strings
+ */
+ private $_tpl=array();
+ /**
+ * @var array list of directive settings
+ */
+ private $_directive=array();
+
+ /**
+ * Constructor.
+ * The template will be parsed after construction.
+ * @param string the template string
+ */
+ public function __construct($template)
+ {
+ $this->parse($template);
+ }
+
+ /**
+ * @return array name-value pairs declared in the directive
+ */
+ public function getDirective()
+ {
+ return $this->_directive;
+ }
+
+ /**
+ * Instantiates the template.
+ * Content in the template will be instantiated as components and text strings
+ * and passed to the specified parent control.
+ * @param TControl the parent control
+ * @throws TTemplateRuntimeException if an error is encountered during the instantiation.
+ */
+ public function instantiateIn($tplControl)
+ {
+ $page=$tplControl->getPage();
+ $controls=array();
+ foreach($this->_tpl as $key=>$object)
+ {
+ if(isset($object[2])) // component
+ {
+ if(strpos($object[1],'.')===false)
+ $component=new $object[1];
+ else
+ $component=Prado::createComponent($object[1]);
+ if($component instanceof TControl)
+ {
+ $controls[$key]=$component;
+ $component->setTemplateControl($tplControl);
+ if(isset($object[2]['id']))
+ $tplControl->registerObject($object[2]['id'],$component);
+ if(isset($object[2]['skinid']))
+ {
+ $component->setSkinID($object[2]['skinid']);
+ unset($object[2]['skinid']);
+ }
+ $component->applyStyleSheetSkin($page);
+ // apply attributes
+ foreach($object[2] as $name=>$value)
+ {
+ if($component->hasEvent($name)) // is an event
+ {
+ if(is_string($value))
+ {
+ if(strpos($value,'.')===false)
+ $component->attachEventHandler($name,array($component,'TemplateControl.'.$value));
+ else
+ $component->attachEventHandler($name,array($component,$value));
+ }
+ else
+ throw new TTemplateRuntimeException('template_event_invalid',$name);
+ }
+ else if(strpos($name,'.')===false) // is simple property or custom attribute
+ {
+ if($component->hasProperty($name))
+ {
+ if($component->canSetProperty($name))
+ {
+ $setter='set'.$name;
+ if(is_string($value))
+ $component->$setter($value);
+ else if($value[0]===0)
+ $component->bindProperty($name,$value[1]);
+ else
+ $component->$setter($component->evaluateExpression($value[1]));
+ }
+ else
+ throw new TTemplateRuntimeException('property_read_only',get_class($component).'.'.$name);
+ }
+ else if($component->getAllowCustomAttributes())
+ $component->getAttributes()->add($name,$value);
+ else
+ throw new TTemplateRuntimeException('property_not_defined',get_class($component).'.'.$name);
+ }
+ else // complex property
+ {
+ if(is_string($value))
+ $component->setPropertyByPath($name,$value);
+ else if($value[0]===0)
+ $component->bindProperty($name,$value[1]);
+ else
+ $component->setPropertyByPath($component->evaluateExpression($value[1]));
+ }
+ }
+ $parent=isset($controls[$object[0]])?$controls[$object[0]]:$tplControl;
+ $component->createdOnTemplate($parent);
+ }
+ else if($component instanceof TComponent)
+ {
+ if(isset($object[2]['id']))
+ {
+ $tplControl->registerObject($object[2]['id'],$component);
+ if(!$component->hasProperty('id'))
+ unset($object[2]['id']);
+ }
+ foreach($object[2] as $name=>$value)
+ {
+ if($component->hasProperty($name))
+ {
+ if($component->canSetProperty($name))
+ {
+ $setter='set'.$name;
+ if(is_string($value))
+ $component->$setter($value);
+ else if($value[0]===1)
+ $component->$setter($component->evaluateExpression($value[1]));
+ else
+ throw new TTemplateRuntimeException('template_component_property_unbindable',get_class($component),$name);
+ }
+ else
+ throw new TTemplateRuntimeException('property_read_only',get_class($component).'.'.$name);
+ }
+ else
+ throw new TTemplateRuntimeException('property_not_defined',get_class($component).'.'.$name);
+ }
+ $parent=isset($controls[$object[0]])?$controls[$object[0]]:$tplControl;
+ $parent->addParsedObject($component);
+ }
+ else
+ throw new TTemplateRuntimeException('must_be_component',$object[1]);
+ }
+ else // string
+ {
+ if(isset($controls[$object[0]]))
+ $controls[$object[0]]->addParsedObject($object[1]);
+ else
+ $tplControl->addParsedObject($object[1]);
+ }
+ }
+ }
+
+ /**
+ * NOTE, this method is currently not used!!!
+ * Processes an attribute set in a component tag.
+ * The attribute will be checked to see if it represents a property or an event.
+ * If so, the value will be set to the property, or the value will be treated
+ * as an event handler and attached to the event.
+ * Otherwise, it will be added as regualr attribute if the control allows so.
+ * @param TComponent the component represented by the tag
+ * @param string attribute name
+ * @param string attribute value
+ * @throws TTemplateRuntimeException
+ */
+ public static function applyAttribute($component,$name,$value)
+ {
+ $target=$component;
+ if(strpos($name,'.')===false)
+ $property=$name;
+ else
+ {
+ $names=explode('.',$name);
+ $property=array_pop($names);
+ foreach($names as $p)
+ {
+ if(($target instanceof TComponent) && $target->canGetProperty($p))
+ {
+ $getter='get'.$p;
+ $target=$target->$getter();
+ }
+ else
+ throw new TTemplateRuntimeException('invalid_subproperty',$name);
+ }
+ }
+ if($target instanceof TControl)
+ {
+ if($target->hasProperty($property))
+ {
+ $setter='set'.$property;
+ if(is_string($value))
+ $target->$setter($value);
+ else if($value[0]===0)
+ $target->bindProperty($property,$value[1]);
+ else
+ {
+ $target->$setter($target->evaluateExpression($value[1]));
+ }
+ }
+ else if($target->hasEvent($property))
+ {
+ if(strpos($value,'.')===false)
+ $target->attachEventHandler($property,'TemplateControl.'.$value);
+ else
+ $target->attachEventHandler($property,$value);
+ }
+ else if($target->getAllowCustomAttributes())
+ $target->getAttributes()->add($property,$value);
+ else
+ throw new TTemplateRuntimeException('property_not_defined',get_class($target).'.'.$property);
+ }
+ else if($target instanceof TComponent)
+ {
+ $setter='set'.$property;
+ $target->$setter($value);
+ }
+ else
+ throw new TTemplateRuntimeException('must_extend_TComponent',get_class($target));
+ }
+
+ /**
+ * 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
+ * @return array the parsed result
+ * @throws TTemplateParsingException if a parsing error is encountered
+ */
+ protected function &parse($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;
+ $c=0;
+ for($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]);
+ $tpl[$c++]=array($container,$type,$attributes);
+ if($str[strlen($str)-2]!=='/') // open tag
+ {
+ array_push($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))
+ {
+ $line=count(explode("\n",substr($input,0,$matchEnd+1)));
+ throw new TTemplateParsingException('unexpected_closing_tag',$line,"</com:$type>");
+ }
+
+ $name=array_pop($stack);
+ if($name!==$type)
+ {
+ if($name[0]==='@')
+ $tag='</prop:'.substr($name,1).'>';
+ else
+ $tag='</com:'.$name.'>';
+ $line=count(explode("\n",substr($input,0,$matchEnd+1)));
+ throw new TTemplateParsingException('expecting_closing_tag',$line,$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]))
+ {
+ $line=count(explode("\n",substr($input,0,$matchEnd+1)));
+ throw new TTemplateParsingException('nonunique_template_directive',$line);
+ }
+ $this->_directive=$this->parseAttributes($match[4][0]);
+ }
+ else if(strpos($str,'<%')===0) // expression
+ {
+ if($expectPropEnd)
+ continue;
+ if($matchStart>$textStart)
+ $tpl[$c++]=array($container,substr($input,$textStart,$matchStart-$textStart));
+ $textStart=$matchEnd+1;
+ if($str[2]==='=')
+ $tpl[$c++]=array($container,'TExpression',array('Expression'=>$match[5][0]));
+ else
+ $tpl[$c++]=array($container,'TStatements',array('Statements'=>$match[5][0]));
+ }
+ else if(strpos($str,'<prop:')===0) // opening property
+ {
+ $prop=strtolower($match[3][0]);
+ array_push($stack,'@'.$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))
+ {
+ $line=count(explode("\n",substr($input,0,$matchEnd+1)));
+ throw new TTemplateParsingException('unexpected_closing_tag',$line,"</prop:$prop>");
+ }
+ $name=array_pop($stack);
+ if($name!=='@'.$prop)
+ {
+ if($name[0]==='@')
+ $tag='</prop:'.substr($name,1).'>';
+ else
+ $tag='</com:'.$name.'>';
+ $line=count(explode("\n",substr($input,0,$matchEnd+1)));
+ throw new TTemplateParsingException('expecting_closing_tag',$line,$tag);
+ }
+ if(($last=count($stack))<1 || $stack[$last-1][0]!=='@')
+ {
+ if($matchStart>$textStart && $container>=0)
+ {
+ $value=substr($input,$textStart,$matchStart-$textStart);
+ if(preg_match('/^<%.*?%>$/msS',$value))
+ {
+ if($value[2]==='#') // databind
+ $tpl[$container][2][$prop]=array(0,substr($value,3,strlen($value)-5));
+ else if($value[2]==='=') // a dynamic initialization
+ $tpl[$container][2][$prop]=array(1,substr($value,3,strlen($value)-5));
+ else
+ $tpl[$container][2][$prop]=$value;
+ }
+ else
+ $tpl[$container][2][$prop]=$value;
+ $textStart=$matchEnd+1;
+ }
+ $expectPropEnd=false;
+ }
+ }
+ else if(strpos($str,'<!--')===0) // HTML comments
+ {
+ $state=0;
+ }
+ else if(strpos($str,'<!')===0) // template comments
+ {
+ if($expectPropEnd)
+ {
+ $line=count(explode("\n",substr($input,0,$matchEnd+1)));
+ throw new TTemplateParsingException('no_comments_in_property',$line);
+ }
+ if($matchStart>$textStart)
+ $tpl[$c++]=array($container,substr($input,$textStart,$matchStart-$textStart));
+ $textStart=$matchEnd+1;
+ }
+ else
+ throw new TTemplateParsingException('unexpected_matching',$match);
+ }
+ if(!empty($stack))
+ {
+ $name=array_pop($stack);
+ if($name[0]==='@')
+ $tag='</prop:'.substr($name,1).'>';
+ else
+ $tag='</com:'.$name.'>';
+ $line=count(explode("\n",substr($input,0,$matchEnd+1)));
+ throw new TTemplateParsingException('expecting_closing_tag',$line,$tag);
+ }
+ if($textStart<strlen($input))
+ $tpl[$c++]=array($container,substr($input,$textStart));
+ return $tpl;
+ }
+
+ /**
+ * Parses the attributes of a tag from a string.
+ * @param string the string to be parsed.
+ * @return array attribute values indexed by names.
+ */
+ protected function parseAttributes($str)
+ {
+ if($str==='')
+ return array();
+ $pattern='/([\w\.]+)=(\'.*?\'|".*?"|<%.*?%>)/msS';
+ $attributes=array();
+ $n=preg_match_all($pattern,$str,$matches,PREG_SET_ORDER);
+ for($i=0;$i<$n;++$i)
+ {
+ $name=strtolower($matches[$i][1]);
+ $value=$matches[$i][2];
+ if($value[0]==='<')
+ {
+ if($value[2]==='#') // databind
+ $attributes[$name]=array(0,substr($value,3,strlen($value)-5));
+ else if($value[2]==='=') // a dynamic initialization
+ $attributes[$name]=array(1,substr($value,3,strlen($value)-5));
+ else
+ $attributes[$name]=substr($value,2,strlen($value)-4);
+ }
+ else
+ $attributes[$name]=substr($value,1,strlen($value)-2);
+ }
+ return $attributes;
+ }
+}
+
+?>
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