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phab/src/applications/files/document/PhabricatorHexdumpDocumentEngine.php
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PhabricatorHexdumpDocumentEngine.php
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<?php
final class PhabricatorHexdumpDocumentEngine
extends PhabricatorDocumentEngine {
const ENGINEKEY = 'hexdump';
public function getViewAsLabel(PhabricatorDocumentRef $ref) {
return pht('View as Hexdump');
}
protected function getDocumentIconIcon(PhabricatorDocumentRef $ref) {
return 'fa-microchip';
}
protected function getByteLengthLimit() {
return (1024 * 1024 * 1);
}
protected function getContentScore(PhabricatorDocumentRef $ref) {
return 500;
}
protected function canRenderDocumentType(PhabricatorDocumentRef $ref) {
return true;
}
protected function canRenderPartialDocument(PhabricatorDocumentRef $ref) {
return true;
}
protected function newDocumentContent(PhabricatorDocumentRef $ref) {
$limit = $this->getByteLengthLimit();
$length = $ref->getByteLength();
$is_partial = false;
if ($limit) {
if ($length > $limit) {
$is_partial = true;
$length = $limit;
}
}
$content = $ref->loadData(null, $length);
$output = array();
$offset = 0;
$lines = str_split($content, 16);
foreach ($lines as $line) {
$output[] = sprintf(
'%08x %- 23s %- 23s %- 16s',
$offset,
$this->renderHex(substr($line, 0, 8)),
$this->renderHex(substr($line, 8)),
$this->renderBytes($line));
$offset += 16;
}
$output = implode("\n", $output);
$container = phutil_tag(
'div',
array(
'class' => 'document-engine-hexdump PhabricatorMonospaced',
),
$output);
$message = null;
if ($is_partial) {
$message = $this->newMessage(
pht(
'This document is too large to be completely rendered inline. The '.
'first %s bytes are shown.',
new PhutilNumber($limit)));
}
return array(
$message,
$container,
);
}
private function renderHex($bytes) {
$length = strlen($bytes);
$output = array();
for ($ii = 0; $ii < $length; $ii++) {
$output[] = sprintf('%02x', ord($bytes[$ii]));
}
return implode(' ', $output);
}
private function renderBytes($bytes) {
$length = strlen($bytes);
$output = array();
for ($ii = 0; $ii < $length; $ii++) {
$chr = $bytes[$ii];
$ord = ord($chr);
if ($ord < 0x20 || $ord >= 0x7F) {
$chr = '.';
}
$output[] = $chr;
}
return implode('', $output);
}
}
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