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phorge/src/applications/phortune/pdf/PhabricatorPDFObject.php
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PhabricatorPDFObject.php
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<?php
abstract class PhabricatorPDFObject
extends PhabricatorPDFFragment {
private $generator;
private $objectIndex;
private $children = array();
private $streams = array();
final public function hasRefTableEntry() {
return true;
}
final protected function writeFragment() {
$this->writeLine('%d 0 obj', $this->getObjectIndex());
$this->writeLine('<<');
$this->writeObject();
$this->writeLine('>>');
$streams = $this->streams;
$this->streams = array();
foreach ($streams as $stream) {
$this->writeLine('stream');
$this->writeLine('%s', $stream);
$this->writeLine('endstream');
}
$this->writeLine('endobj');
}
final public function setGenerator(
PhabricatorPDFGenerator $generator,
$index) {
if ($this->getGenerator()) {
throw new Exception(
pht(
'This PDF object is already registered with a PDF generator. You '.
'can not register an object with more than one generator.'));
}
$this->generator = $generator;
$this->objectIndex = $index;
foreach ($this->getChildren() as $child) {
$generator->addObject($child);
}
return $this;
}
final public function getGenerator() {
return $this->generator;
}
final public function getObjectIndex() {
if (!$this->objectIndex) {
throw new Exception(
pht(
'Trying to get index for object ("%s") which has not been '.
'registered with a generator.',
get_class($this)));
}
return $this->objectIndex;
}
final protected function newChildObject(PhabricatorPDFObject $object) {
if ($this->generator) {
throw new Exception(
pht(
'Trying to add a new PDF Object child after already registering '.
'the object with a generator.'));
}
$this->children[] = $object;
return $object;
}
private function getChildren() {
return $this->children;
}
abstract protected function writeObject();
final protected function newStream($raw_data) {
$stream_data = gzcompress($raw_data);
$this->streams[] = $stream_data;
return strlen($stream_data);
}
}

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