/**
* Parse a parent object from a string
*
* @param string $stream
* @return ParentObject
*/
public static function parse($stream)
{
$parent = new self();
$parent->setIndex(substr($stream, 0, strpos($stream, ' ')));
$stream = str_replace($parent->getIndex() . ' 0 obj', '[{parent_index}] 0 obj', $stream);
// Determine the kids count.
$matches = [];
preg_match('/\\/Count\\s\\d*/', $stream, $matches);
$count = $matches[0];
$count = str_replace('/Count ', '', $count);
$stream = str_replace('Count ' . $count, 'Count [{count}]', $stream);
// Determine the kids object indices.
$kids = trim(substr($stream, strpos($stream, '/Kids') + 5));
$kids = substr($kids, 0, 1) == '[' ? substr($kids, 0, strpos($kids, ']') + 1) : substr($kids, 0, strpos($kids, ' R') + 2);
$kidIndices = $parent->getDictionaryReferences(substr($stream, strpos($stream, '/Kids') + 5));
$parent->setKids($kidIndices);
$parent->setData(str_replace($kids, '[[{kids}]]', $stream) . "\n");
return $parent;
}
