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PhabricatorPDFTailFragment.php
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			<?php

			final class PhabricatorPDFTailFragment
			extends PhabricatorPDFFragment {

			private $iterator;

			public function setIterator(PhabricatorPDFIterator $iterator) {
			$this->iterator = $iterator;
			return $this;
			}

			public function getIterator() {
			return $this->iterator;
			}

			protected function writeFragment() {
			$iterator = $this->getIterator();
			$generator = $iterator->getGenerator();
			$objects = $generator->getObjects();

			$xref_offset = null;

			$this->writeLine('xref');
			$this->writeLine('0 %d', count($objects) + 1);
			$this->writeLine('%010d %05d f ', 0, 0xFFFF);

			$offset_map = array();

			$fragment_offsets = $iterator->getFragmentOffsets();
			foreach ($fragment_offsets as $fragment_offset) {
			$fragment = $fragment_offset->getFragment();
			$offset = $fragment_offset->getOffset();

			if ($fragment === $this) {
			$xref_offset = $offset;
			}

			if (!$fragment->hasRefTableEntry()) {
			continue;
			}

			$offset_map[$fragment->getObjectIndex()] = $offset;
			}

			ksort($offset_map);

			foreach ($offset_map as $offset) {
			$this->writeLine('%010d %05d n ', $offset, 0);
			}

			$this->writeLine('trailer');
			$this->writeLine('<<');
			$this->writeLine('/Size %d', count($objects) + 1);

			$info_object = $generator->getInfoObject();
			if ($info_object) {
			$this->writeLine('/Info %d 0 R', $info_object->getObjectIndex());
			}

			$catalog_object = $generator->getCatalogObject();
			if ($catalog_object) {
			$this->writeLine('/Root %d 0 R', $catalog_object->getObjectIndex());
			}

			$this->writeLine('>>');
			$this->writeLine('startxref');
			$this->writeLine('%d', $xref_offset);
			$this->writeLine('%s', '%%EOF');
			}

			}