/** * 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; }