/**
* Unmarshall a DOMElement object corresponding to an XHTML img element.
*
* @param \DOMElement $element A DOMElement object.
* @return \qtism\data\QtiComponent n Img object.
* @throws \qtism\data\storage\xml\marshalling\UnmarshallingException
*/
protected function unmarshall(DOMElement $element)
{
if (($src = self::getDOMElementAttributeAs($element, 'src')) !== null) {
if (($alt = self::getDOMElementAttributeAs($element, 'alt')) === null) {
// The XSD does not force the 'alt' attribute to be non-empty,
// thus we consider the 'alt' attribute value as an empty string ('').
$alt = '';
}
$component = new Img($src, $alt);
if (($longdesc = self::getDOMElementAttributeAs($element, 'longdesc')) !== null) {
$component->setLongdesc($longdesc);
}
if (($height = self::getDOMElementAttributeAs($element, 'height', 'string')) !== null) {
if (stripos($height, '%') === false) {
$component->setHeight(intval($height));
} else {
$component->setHeight($height);
}
}
if (($width = self::getDOMElementAttributeAs($element, 'width', 'string')) !== null) {
if (stripos($width, '%') === false) {
$component->setWidth(intval($width));
} else {
$component->setWidth($width);
}
}
if (($xmlBase = self::getXmlBase($element)) !== false) {
$component->setXmlBase($xmlBase);
}
$this->fillBodyElement($component, $element);
return $component;
} else {
$msg = "The 'mandatory' attribute 'src' is missing from element 'img'.";
throw new UnmarshallingException($msg, $element);
}
}
