PhabricatorPDFDocumentEngine.php
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	<?php

	final class PhabricatorPDFDocumentEngine
	extends PhabricatorDocumentEngine {

	const ENGINEKEY = 'pdf';

	public function getViewAsLabel(PhabricatorDocumentRef $ref) {
	return pht('View as PDF');
	}

	protected function getDocumentIconIcon(PhabricatorDocumentRef $ref) {
	return 'fa-file-pdf-o';
	}

	protected function canRenderDocumentType(PhabricatorDocumentRef $ref) {
	// Since we just render a link to the document anyway, we don't need to
	// check anything fancy in config to see if the MIME type is actually
	// viewable.

	return $ref->hasAnyMimeType(
	array(
	'application/pdf',
	));
	}

	protected function newDocumentContent(PhabricatorDocumentRef $ref) {
	$viewer = $this->getViewer();

	$file = $ref->getFile();
	if ($file) {
	$source_uri = $file->getViewURI();
	} else {
	throw new PhutilMethodNotImplementedException();
	}

	$name = $ref->getName();
	$length = $ref->getByteLength();

	$link = id(new PhabricatorFileLinkView())
	->setViewer($viewer)
	->setFileName($name)
	->setFileViewURI($source_uri)
	->setFileViewable(true)
	->setFileSize(phutil_format_bytes($length));

	$container = phutil_tag(
	'div',
	array(
	'class' => 'document-engine-pdf',
	),
	$link);

	return $container;
	}

	}