function filterDOM(PHPTAL_Dom_Element $root)
{
// let xml:space=preserve preserve attributes as well
if ($root->getAttributeNS("http://www.w3.org/XML/1998/namespace", 'space') == 'preserve') {
$this->findElementToFilter($root);
return;
}
$this->normalizeAttributes($root);
// <pre> may have attributes normalized
if ($this->isSpaceSensitiveInXHTML($root)) {
$this->findElementToFilter($root);
return;
}
$lastTextNode = null;
foreach ($root->childNodes as $node) {
// CDATA is not normalized by design
if ($node instanceof PHPTAL_Dom_Text) {
$norm = $this->normalizeSpace($node->getValueEscaped(), $node->getEncoding());
$node->setValueEscaped($norm);
if ('' === $norm) {
$root->removeChild($node);
} else {
if ($lastTextNode) {
// "foo " . " bar" gives 2 spaces.
$norm = $lastTextNode->getValueEscaped() . ltrim($norm, ' ');
$lastTextNode->setValueEscaped($norm);
// assumes all nodes use same encoding (they do)
$root->removeChild($node);
} else {
$lastTextNode = $node;
}
}
} else {
$lastTextNode = null;
if ($node instanceof PHPTAL_Dom_Element) {
$this->filterDOM($node);
}
}
}
}
/**
* HTML5 doesn't care about boilerplate
*/
private function elementSpecificOptimizations(PHPTAL_Dom_Element $element)
{
if ($element->getNamespaceURI() !== 'http://www.w3.org/1999/xhtml' && $element->getNamespaceURI() !== '') {
return;
}
if ($this->getPHPTAL()->getOutputMode() !== PHPTAL::HTML5) {
return;
}
// <meta charset>
if ('meta' === $element->getLocalName() && $element->getAttributeNS('', 'http-equiv') === 'Content-Type') {
$element->removeAttributeNS('', 'http-equiv');
$element->removeAttributeNS('', 'content');
$element->setAttributeNS('', 'charset', strtolower($this->getPHPTAL()->getEncoding()));
} elseif ('link' === $element->getLocalName() && $element->getAttributeNS('', 'rel') === 'stylesheet' || 'style' === $element->getLocalName()) {
// There's only one type of stylesheets that works.
$element->removeAttributeNS('', 'type');
} elseif ('script' === $element->getLocalName()) {
$element->removeAttributeNS('', 'language');
// Only remove type that matches default. E4X, vbscript, coffeescript, etc. must be preserved
$type = $element->getAttributeNS('', 'type');
$is_std = preg_match('/^(?:text|application)\\/(?:ecma|java)script(\\s*;\\s*charset\\s*=\\s*[^;]*)?$/', $type);
// Remote scripts should have type specified in HTTP headers.
if ($is_std || $element->getAttributeNS('', 'src')) {
$element->removeAttributeNS('', 'type');
}
}
}
