/**
* Walk through action and its chained actions tree and remove nodes
* if they are GoTo actions with an unresolved target.
*
* Returns null if root node is deleted or updated action overwise.
*
* @todo Give appropriate name and make method public
*
* @param Zend_Pdf_Action $action
* @param boolean $refreshPagesHash Refresh page collection hashes before processing
* @return Zend_Pdf_Action|null
*/
protected function _cleanUpAction(Zend_Pdf_Action $action, $refreshPageCollectionHashes = true)
{
if ($this->_pageReferences === null || $refreshPageCollectionHashes) {
$this->_refreshPagesHash();
}
// Named target is an action
if ($action instanceof Zend_Pdf_Action_GoTo &&
$this->resolveDestination($action->getDestination(), false) === null) {
// Action itself is a GoTo action with an unresolved destination
return null;
}
// Walk through child actions
$iterator = new RecursiveIteratorIterator($action, RecursiveIteratorIterator::SELF_FIRST);
$actionsToClean = array();
$deletionCandidateKeys = array();
foreach ($iterator as $chainedAction) {
if ($chainedAction instanceof Zend_Pdf_Action_GoTo &&
$this->resolveDestination($chainedAction->getDestination(), false) === null) {
// Some child action is a GoTo action with an unresolved destination
// Mark it as a candidate for deletion
$actionsToClean[] = $iterator->getSubIterator();
$deletionCandidateKeys[] = $iterator->getSubIterator()->key();
}
}
foreach ($actionsToClean as $id => $action) {
unset($action->next[$deletionCandidateKeys[$id]]);
}
return $action;
}
protected function _cleanUpAction(Zend_Pdf_Action $action, $refreshPageCollectionHashes = true)
{
if ($this->_pageReferences === null || $refreshPageCollectionHashes) {
$this->_refreshPagesHash();
}
if ($action instanceof Zend_Pdf_Action_GoTo && $this->resolveDestination($action->getDestination(), false) === null) {
return null;
}
$iterator = new RecursiveIteratorIterator($action, RecursiveIteratorIterator::SELF_FIRST);
$actionsToClean = array();
$deletionCandidateKeys = array();
foreach ($iterator as $chainedAction) {
if ($chainedAction instanceof Zend_Pdf_Action_GoTo && $this->resolveDestination($chainedAction->getDestination(), false) === null) {
$actionsToClean[] = $iterator->getSubIterator();
$deletionCandidateKeys[] = $iterator->getSubIterator()->key();
}
}
foreach ($actionsToClean as $id => $action) {
unset($action->next[$deletionCandidateKeys[$id]]);
}
return $action;
}
