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PhabricatorDocumentEngine.php
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Created
Fri, Jan 10, 22:10

PhabricatorDocumentEngine.php
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<?php
abstract class PhabricatorDocumentEngine
extends Phobject {
private $viewer;
private $highlightedLines = array();
private $encodingConfiguration;
private $highlightingConfiguration;
private $blameConfiguration = true;
final public function setViewer(PhabricatorUser $viewer) {
$this->viewer = $viewer;
return $this;
}
final public function getViewer() {
return $this->viewer;
}
final public function setHighlightedLines(array $highlighted_lines) {
$this->highlightedLines = $highlighted_lines;
return $this;
}
final public function getHighlightedLines() {
return $this->highlightedLines;
}
final public function canRenderDocument(PhabricatorDocumentRef $ref) {
return $this->canRenderDocumentType($ref);
}
public function canConfigureEncoding(PhabricatorDocumentRef $ref) {
return false;
}
public function canConfigureHighlighting(PhabricatorDocumentRef $ref) {
return false;
}
public function canBlame(PhabricatorDocumentRef $ref) {
return false;
}
final public function setEncodingConfiguration($config) {
$this->encodingConfiguration = $config;
return $this;
}
final public function getEncodingConfiguration() {
return $this->encodingConfiguration;
}
final public function setHighlightingConfiguration($config) {
$this->highlightingConfiguration = $config;
return $this;
}
final public function getHighlightingConfiguration() {
return $this->highlightingConfiguration;
}
final public function setBlameConfiguration($blame_configuration) {
$this->blameConfiguration = $blame_configuration;
return $this;
}
final public function getBlameConfiguration() {
return $this->blameConfiguration;
}
final protected function getBlameEnabled() {
return $this->blameConfiguration;
}
public function shouldRenderAsync(PhabricatorDocumentRef $ref) {
return false;
}
abstract protected function canRenderDocumentType(
PhabricatorDocumentRef $ref);
final public function newDocument(PhabricatorDocumentRef $ref) {
$can_complete = $this->canRenderCompleteDocument($ref);
$can_partial = $this->canRenderPartialDocument($ref);
if (!$can_complete && !$can_partial) {
return $this->newMessage(
pht(
'This document is too large to be rendered inline. (The document '.
'is %s bytes, the limit for this engine is %s bytes.)',
new PhutilNumber($ref->getByteLength()),
new PhutilNumber($this->getByteLengthLimit())));
}
return $this->newDocumentContent($ref);
}
final public function newDocumentIcon(PhabricatorDocumentRef $ref) {
return id(new PHUIIconView())
->setIcon($this->getDocumentIconIcon($ref));
}
abstract protected function newDocumentContent(
PhabricatorDocumentRef $ref);
protected function getDocumentIconIcon(PhabricatorDocumentRef $ref) {
return 'fa-file-o';
}
protected function getDocumentRenderingText(PhabricatorDocumentRef $ref) {
return pht('Loading...');
}
final public function getDocumentEngineKey() {
return $this->getPhobjectClassConstant('ENGINEKEY');
}
final public static function getAllEngines() {
return id(new PhutilClassMapQuery())
->setAncestorClass(__CLASS__)
->setUniqueMethod('getDocumentEngineKey')
->execute();
}
final public function newSortVector(PhabricatorDocumentRef $ref) {
$content_score = $this->getContentScore($ref);
// Prefer engines which can render the entire file over engines which
// can only render a header, and engines which can render a header over
// engines which can't render anything.
if ($this->canRenderCompleteDocument($ref)) {
$limit_score = 0;
} else if ($this->canRenderPartialDocument($ref)) {
$limit_score = 1;
} else {
$limit_score = 2;
}
return id(new PhutilSortVector())
->addInt($limit_score)
->addInt(-$content_score);
}
protected function getContentScore(PhabricatorDocumentRef $ref) {
return 2000;
}
abstract public function getViewAsLabel(PhabricatorDocumentRef $ref);
public function getViewAsIconIcon(PhabricatorDocumentRef $ref) {
$can_complete = $this->canRenderCompleteDocument($ref);
$can_partial = $this->canRenderPartialDocument($ref);
if (!$can_complete && !$can_partial) {
return 'fa-times';
}
return $this->getDocumentIconIcon($ref);
}
public function getViewAsIconColor(PhabricatorDocumentRef $ref) {
$can_complete = $this->canRenderCompleteDocument($ref);
if (!$can_complete) {
return 'grey';
}
return null;
}
final public static function getEnginesForRef(
PhabricatorUser $viewer,
PhabricatorDocumentRef $ref) {
$engines = self::getAllEngines();
foreach ($engines as $key => $engine) {
$engine = id(clone $engine)
->setViewer($viewer);
if (!$engine->canRenderDocument($ref)) {
unset($engines[$key]);
continue;
}
$engines[$key] = $engine;
}
if (!$engines) {
throw new Exception(pht('No content engine can render this document.'));
}
$vectors = array();
foreach ($engines as $key => $usable_engine) {
$vectors[$key] = $usable_engine->newSortVector($ref);
}
$vectors = msortv($vectors, 'getSelf');
return array_select_keys($engines, array_keys($vectors));
}
protected function getByteLengthLimit() {
return (1024 * 1024 * 8);
}
protected function canRenderCompleteDocument(PhabricatorDocumentRef $ref) {
$limit = $this->getByteLengthLimit();
if ($limit) {
$length = $ref->getByteLength();
if ($length > $limit) {
return false;
}
}
return true;
}
protected function canRenderPartialDocument(PhabricatorDocumentRef $ref) {
return false;
}
protected function newMessage($message) {
return phutil_tag(
'div',
array(
'class' => 'document-engine-error',
),
$message);
}
final public function newLoadingContent(PhabricatorDocumentRef $ref) {
$spinner = id(new PHUIIconView())
->setIcon('fa-gear')
->addClass('ph-spin');
return phutil_tag(
'div',
array(
'class' => 'document-engine-loading',
),
array(
$spinner,
$this->getDocumentRenderingText($ref),
));
}
}

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