Inheritance diagram for AbstractConditionViewHelper:

Public Member Functions
	setChildNodes (array $childNodes)

	__construct ()

	render ()

	compile ($argumentsVariableName, $renderChildrenClosureVariableName, &$initializationPhpCode,\TYPO3\CMS\Fluid\Core\Parser\SyntaxTree\AbstractNode $syntaxTreeNode,\TYPO3\CMS\Fluid\Core\Compiler\TemplateCompiler $templateCompiler)

Public Member Functions inherited from AbstractViewHelper
	setArguments (array $arguments)

	setRenderingContext (\TYPO3\CMS\Fluid\Core\Rendering\RenderingContextInterface $renderingContext)

	injectReflectionService (\TYPO3\CMS\Extbase\Reflection\ReflectionService $reflectionService)

	isEscapingInterceptorEnabled ()

	setViewHelperNode (\TYPO3\CMS\Fluid\Core\Parser\SyntaxTree\ViewHelperNode $node)

	setRenderChildrenClosure (\Closure $renderChildrenClosure)

	initializeArgumentsAndRender ()

	initialize ()

	renderChildren ()

	prepareArguments ()

	validateArguments ()

	initializeArguments ()

	compile ($argumentsVariableName, $renderChildrenClosureVariableName, &$initializationPhpCode,\TYPO3\CMS\Fluid\Core\Parser\SyntaxTree\AbstractNode $syntaxTreeNode,\TYPO3\CMS\Fluid\Core\Compiler\TemplateCompiler $templateCompiler)

	resetState ()

Static Public Member Functions
static	renderStatic (array $arguments,\Closure $renderChildrenClosure,\TYPO3\CMS\Fluid\Core\Rendering\RenderingContextInterface $renderingContext)

Static Public Member Functions inherited from AbstractViewHelper
static	renderStatic (array $arguments,\Closure $renderChildrenClosure,\TYPO3\CMS\Fluid\Core\Rendering\RenderingContextInterface $renderingContext)

Protected Member Functions
	renderThenChild ()

	renderElseChild ()

Protected Member Functions inherited from AbstractViewHelper
	registerArgument ($name, $type, $description, $required=false, $defaultValue=null)

	overrideArgument ($name, $type, $description, $required=false, $defaultValue=null)

	callRenderMethod ()

	getLogger ()

	buildRenderChildrenClosure ()

	hasArgument ($argumentName)

Static Protected Member Functions
static	renderStaticThenChild ($arguments, &$hasEvaluated)

static	renderStaticElseChild ($arguments, &$hasEvaluated)

static	evaluateCondition ($arguments=null)

Private Attributes
	$childNodes = array()

Additional Inherited Members
Protected Attributes inherited from AbstractViewHelper
	$arguments

	$templateVariableContainer

	$controllerContext

	$renderingContext

	$renderChildrenClosure = null

	$viewHelperVariableContainer

	$objectManager

	$escapingInterceptorEnabled = true

Detailed Description

This view helper is an abstract ViewHelper which implements an if/else condition.

See Also: TYPO3::convertArgumentValue() to find see how boolean arguments are evaluated

= Usage =

To create a custom Condition ViewHelper, you need to subclass this class, and implement your own render() method. Inside there, you should call $this->renderThenChild() if the condition evaluated to TRUE, and $this->renderElseChild() if the condition evaluated to FALSE.

Every Condition ViewHelper has a "then" and "else" argument, so it can be used like: <[aConditionViewHelperName] .... then="condition true" else="condition false" />, or as well use the "then" and "else" child nodes.

See Also: TYPO3 for a more detailed explanation and a simple usage example. Make sure to NOT OVERRIDE the constructor.

Definition at line 38 of file AbstractConditionViewHelper.php.

Constructor & Destructor Documentation

__construct ( )

Initializes the "then" and "else" arguments

Definition at line 61 of file AbstractConditionViewHelper.php.

References AbstractViewHelper\registerArgument().

Member Function Documentation

compile	(		$argumentsVariableName,
			$renderChildrenClosureVariableName,
		&	$initializationPhpCode,
		\TYPO3\CMS\Fluid\Core\Parser\SyntaxTree\AbstractNode	$syntaxTreeNode,
		\TYPO3\CMS\Fluid\Core\Compiler\TemplateCompiler	$templateCompiler
	)

The compiled ViewHelper adds two new ViewHelper arguments: __thenClosure and __elseClosure. These contain closures which are be executed to render the then(), respectively else() case.

Parameters

string	$argumentsVariableName
string	$renderChildrenClosureVariableName
string	$initializationPhpCode
\TYPO3\CMS\Fluid\Core\Parser\SyntaxTree\AbstractNode	$syntaxTreeNode
\TYPO3\CMS\Fluid\Core\Compiler\TemplateCompiler	$templateCompiler

Returns: string

Implements CompilableInterface.

Definition at line 201 of file AbstractConditionViewHelper.php.

References ViewHelperNode\getViewHelperClassName().

static evaluateCondition ( $arguments = null )

staticprotected

This method decides if the condition is TRUE or FALSE. It can be overriden in extending viewhelpers to adjust functionality.

Parameters

array $arguments ViewHelper arguments to evaluate the condition for this ViewHelper, allows for flexiblity in overriding this method.

Returns: bool

Definition at line 256 of file AbstractConditionViewHelper.php.

References AbstractViewHelper\$arguments.

render ( )

renders <f:then> child if $condition is true, otherwise renders <f:else> child.

Returns: string the rendered string

Definition at line 73 of file AbstractConditionViewHelper.php.

References AbstractConditionViewHelper\renderElseChild(), and AbstractConditionViewHelper\renderThenChild().

renderElseChild ( )

protected

Returns value of "else" attribute. If else attribute is not set, iterates through child nodes and renders ElseViewHelper. If else attribute is not set and no ElseViewHelper is found, an empty string will be returned.

Returns: string rendered ElseViewHelper or an empty string if no ThenViewHelper was found

Definition at line 149 of file AbstractConditionViewHelper.php.

References ViewHelperNode\getViewHelperClassName().

Referenced by AbstractConditionViewHelper\render().

static renderStatic	(	array	$arguments,
		\Closure	$renderChildrenClosure,
		\TYPO3\CMS\Fluid\Core\Rendering\RenderingContextInterface	$renderingContext
	)

static

Default implementation for CompilableInterface. See CompilableInterface for a detailed description of this method.

Parameters

array	$arguments
\Closure	$renderChildrenClosure
\TYPO3\CMS\Fluid\Core\Rendering\RenderingContextInterface	$renderingContext

Returns: mixed

See Also

Implements CompilableInterface.

Definition at line 230 of file AbstractConditionViewHelper.php.

References AbstractViewHelper\$renderChildrenClosure.

static renderStaticElseChild	(		$arguments,
		&	$hasEvaluated
	)

staticprotected

Statically evalute "else" children. The "$hasEvaluated" argument is there to distinguish the case that "else" returned NULL or was not evaluated.

Parameters

array	$arguments	ViewHelper arguments
bool	$hasEvaluated	Can be used to check if the "else" child was actually evaluated by this method.

Returns: string

Definition at line 176 of file AbstractConditionViewHelper.php.

References AbstractViewHelper\$arguments.

static renderStaticThenChild	(		$arguments,
		&	$hasEvaluated
	)

staticprotected

Statically evalute "then" children. The "$hasEvaluated" argument is there to distinguish the case that "then" returned NULL or was not evaluated.

Parameters

array	$arguments	ViewHelper arguments
bool	$hasEvaluated	Can be used to check if the "then" child was actually evaluated by this method.

Returns: string

Definition at line 126 of file AbstractConditionViewHelper.php.

References AbstractViewHelper\$arguments, and elseif.

renderThenChild ( )

protected

Returns value of "then" attribute. If then attribute is not set, iterates through child nodes and renders ThenViewHelper. If then attribute is not set and no ThenViewHelper and no ElseViewHelper is found, all child nodes are rendered