function normalizeAttributes(PHPTAL_Dom_Element $element)
{
foreach ($element->getAttributeNodes() as $attrnode) {
if ($attrnode->getReplacedState() !== PHPTAL_Dom_Attr::NOT_REPLACED) {
continue;
}
$val = $this->normalizeSpace($attrnode->getValueEscaped(), $attrnode->getEncoding());
$attrnode->setValueEscaped(trim($val, ' '));
}
}
/**
* @param bool $is_nested_in_repeat true if any parent element has tal:repeat
*
* @return rough guess
*/
private function estimateNumberOfBytesOutput(PHPTAL_Dom_Element $element, $is_nested_in_repeat)
{
// macros don't output anything on their own
if ($element->hasAttributeNS('http://xml.zope.org/namespaces/metal', 'define-macro')) {
return 0;
}
$estimated_bytes = 2 * (3 + strlen($element->getQualifiedName()));
foreach ($element->getAttributeNodes() as $attr) {
$estimated_bytes += 4 + strlen($attr->getQualifiedName());
if ($attr->getReplacedState() === PHPTAL_Dom_Attr::NOT_REPLACED) {
$estimated_bytes += strlen($attr->getValueEscaped());
// this is shoddy for replaced attributes
}
}
$has_repeat_attr = $element->hasAttributeNS('http://xml.zope.org/namespaces/tal', 'repeat');
if ($element->hasAttributeNS('http://xml.zope.org/namespaces/tal', 'content') || $element->hasAttributeNS('http://xml.zope.org/namespaces/tal', 'replace')) {
// assume that output in loops is shorter (e.g. table rows) than outside (main content)
$estimated_bytes += $has_repeat_attr || $is_nested_in_repeat ? 500 : 2000;
} else {
foreach ($element->childNodes as $node) {
if ($node instanceof PHPTAL_Dom_Element) {
$estimated_bytes += $this->estimateNumberOfBytesOutput($node, $has_repeat_attr || $is_nested_in_repeat);
} else {
$estimated_bytes += strlen($node->getValueEscaped());
}
}
}
if ($element->hasAttributeNS('http://xml.zope.org/namespaces/metal', 'use-macro')) {
$estimated_bytes += $has_repeat_attr || $is_nested_in_repeat ? 500 : 2000;
}
if ($element->hasAttributeNS('http://xml.zope.org/namespaces/tal', 'condition')) {
$estimated_bytes /= 2;
// naively assuming 50% chance, that works well with if/else pattern
}
if ($element->hasAttributeNS('http://xml.zope.org/namespaces/tal', 'repeat')) {
// assume people don't write big nested loops
$estimated_bytes *= $is_nested_in_repeat ? 5 : 10;
}
return $estimated_bytes;
}
