public function transform()
{
// Re-map desired model to content data attribute to ease expression and template definition.
// Most likely, the model will be a parent document's data attribute.
$model = ExpressionEvaluator::evaluate($this->getParentObject(), $this->getRequiredAttribute('content-mapping'));
$this->setData('content', $model);
// Calculate result to match against condition
$result = ExpressionEvaluator::evaluate($this, $this->getRequiredAttribute('expression'));
// The condition defines whether or not the content is displayed. Can be overwritten
// by the "condition" attribute according to the TemplateCondition capabilities.
$condition = $this->getAttribute('condition', 'notEmpty()');
if (!TemplateCondition::applies($condition, $result)) {
return '';
}
// Mark template for creating output directly as condition matches.
$this->transformOnPlace();
return parent::transform();
}
public function transform()
{
// The condition defines whether or not the content is displayed. Can be overwritten
// by the "condition" attribute according to the TemplateCondition capabilities.
$condition = $this->getAttribute('condition', 'notEmpty()');
$content = $this->getParentObject()->getPlaceHolder($this->getAttribute('name'));
if (!TemplateCondition::applies($condition, $content)) {
return '';
}
// inject place holder content into data attribute to make it accessible within the tag for displaying
if (is_string($content)) {
// Automatically replace simple place holders.
// Allow default content output by omitting place holder in case not necessary.
$this->setPlaceHolder(self::PLACE_HOLDER_NAME, $content);
} elseif (is_array($content) || is_object($content)) {
// inject content into a data attribute for further access
$this->setData(self::PLACE_HOLDER_NAME, $content);
}
return $this->transformChildrenAndPreserveContent();
}
public function testUnknownCondition()
{
$this->assertFalse(TemplateCondition::applies('foo()', null));
}
