PhabricatorHelpKeyboardShortcutController.php
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	<?php

	final class PhabricatorHelpKeyboardShortcutController
	extends PhabricatorHelpController {

	public function shouldAllowPublic() {
	return true;
	}

	public function handleRequest(AphrontRequest $request) {
	$viewer = $request->getViewer();

	$keys = $request->getStr('keys');
	try {
	$keys = phutil_json_decode($keys);
	} catch (PhutilJSONParserException $ex) {
	return new Aphront400Response();
	}

	// There have been at least two users asking for a keyboard shortcut to
	// close the dialog, so be explicit that escape works since it isn't
	// terribly discoverable.
	$keys[] = array(
	'keys' => array('esc'),
	'description' => pht('Close any dialog, including this one.'),
	);

	$stroke_map = array(
	'left' => "\xE2\x86\x90",
	'right' => "\xE2\x86\x92",
	'up' => "\xE2\x86\x91",
	'down' => "\xE2\x86\x93",
	'return' => "\xE2\x8F\x8E",
	'tab' => "\xE2\x87\xA5",
	'delete' => "\xE2\x8C\xAB",
	);

	$rows = array();
	foreach ($keys as $shortcut) {
	$keystrokes = array();
	foreach ($shortcut['keys'] as $stroke) {
	$stroke = idx($stroke_map, $stroke, $stroke);
	$keystrokes[] = phutil_tag('kbd', array(), $stroke);
	}
	$keystrokes = phutil_implode_html(' or ', $keystrokes);
	$rows[] = phutil_tag(
	'tr',
	array(),
	array(
	phutil_tag('th', array(), $keystrokes),
	phutil_tag('td', array(), $shortcut['description']),
	));
	}

	$table = phutil_tag(
	'table',
	array('class' => 'keyboard-shortcut-help'),
	$rows);

	return $this->newDialog()
	->setTitle(pht('Keyboard Shortcuts'))
	->appendChild($table)
	->addCancelButton('#', pht('Close'));

	}

	}