PhabricatorKeyboardRemarkupRule.php
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	<?php

	final class PhabricatorKeyboardRemarkupRule extends PhutilRemarkupRule {

	public function getPriority() {
	return 200.0;
	}

	public function apply($text) {
	return preg_replace_callback(
	'@{key\b((?:[^}\\\\]+\|\\\\.)*)}@m',
	array($this, 'markupKeystrokes'),
	$text);
	}

	public function markupKeystrokes(array $matches) {
	if (!$this->isFlatText($matches[0])) {
	return $matches[0];
	}

	$keys = explode(' ', $matches[1]);
	foreach ($keys as $k => $v) {
	$v = trim($v, " \n");
	$v = preg_replace('/\\\\(.)/', '\\1', $v);
	if (!strlen($v)) {
	unset($keys[$k]);
	continue;
	}
	$keys[$k] = $v;
	}

	$special = array(
	array(
	'name' => pht('Command'),
	'symbol' => "\xE2\x8C\x98",
	'aliases' => array(
	'cmd',
	'command',
	),
	),
	array(
	'name' => pht('Option'),
	'symbol' => "\xE2\x8C\xA5",
	'aliases' => array(
	'opt',
	'option',
	),
	),
	array(
	'name' => pht('Shift'),
	'symbol' => "\xE2\x87\xA7",
	'aliases' => array(
	'shift',
	),
	),
	array(
	'name' => pht('Escape'),
	'symbol' => "\xE2\x8E\x8B",
	'aliases' => array(
	'esc',
	'escape',
	),
	),
	array(
	'name' => pht('Up'),
	'symbol' => "\xE2\x86\x91",
	'heavy' => "\xE2\xAC\x86",
	'aliases' => array(
	'up',
	'arrow-up',
	'up-arrow',
	'north',
	),
	),
	array(
	'name' => pht('Tab'),
	'symbol' => "\xE2\x87\xA5",
	'aliases' => array(
	'tab',
	),
	),
	array(
	'name' => pht('Right'),
	'symbol' => "\xE2\x86\x92",
	'heavy' => "\xE2\x9E\xA1",
	'aliases' => array(
	'right',
	'right-arrow',
	'arrow-right',
	'east',
	),
	),
	array(
	'name' => pht('Left'),
	'symbol' => "\xE2\x86\x90",
	'heavy' => "\xE2\xAC\x85",
	'aliases' => array(
	'left',
	'left-arrow',
	'arrow-left',
	'west',
	),
	),
	array(
	'name' => pht('Down'),
	'symbol' => "\xE2\x86\x93",
	'heavy' => "\xE2\xAC\x87",
	'aliases' => array(
	'down',
	'down-arrow',
	'arrow-down',
	'south',
	),
	),
	array(
	'name' => pht('Up Right'),
	'symbol' => "\xE2\x86\x97",
	'heavy' => "\xE2\xAC\x88",
	'aliases' => array(
	'up-right',
	'upright',
	'up-right-arrow',
	'upright-arrow',
	'arrow-up-right',
	'arrow-upright',
	'northeast',
	'north-east',
	),
	),
	array(
	'name' => pht('Down Right'),
	'symbol' => "\xE2\x86\x98",
	'heavy' => "\xE2\xAC\x8A",
	'aliases' => array(
	'down-right',
	'downright',
	'down-right-arrow',
	'downright-arrow',
	'arrow-down-right',
	'arrow-downright',
	'southeast',
	'south-east',
	),
	),
	array(
	'name' => pht('Down Left'),
	'symbol' => "\xE2\x86\x99",
	'heavy' => "\xE2\xAC\x8B",
	'aliases' => array(
	'down-left',
	'downleft',
	'down-left-arrow',
	'downleft-arrow',
	'arrow-down-left',
	'arrow-downleft',
	'southwest',
	'south-west',
	),
	),
	array(
	'name' => pht('Up Left'),
	'symbol' => "\xE2\x86\x96",
	'heavy' => "\xE2\xAC\x89",
	'aliases' => array(
	'up-left',
	'upleft',
	'up-left-arrow',
	'upleft-arrow',
	'arrow-up-left',
	'arrow-upleft',
	'northwest',
	'north-west',
	),
	),
	);

	$map = array();
	foreach ($special as $spec) {
	foreach ($spec['aliases'] as $alias) {
	$map[$alias] = $spec;
	}
	}

	$is_text = $this->getEngine()->isTextMode();

	$parts = array();
	foreach ($keys as $k => $v) {
	$normal = phutil_utf8_strtolower($v);
	if (isset($map[$normal])) {
	$spec = $map[$normal];
	} else {
	$spec = array(
	'name' => null,
	'symbol' => $v,
	);
	}

	if ($is_text) {
	$parts[] = '['.$spec['symbol'].']';
	} else {
	$parts[] = phutil_tag(
	'kbd',
	array(
	'title' => $spec['name'],
	),
	$spec['symbol']);
	}
	}

	if ($is_text) {
	$parts = implode(' + ', $parts);
	} else {
	$glue = phutil_tag(
	'span',
	array(
	'class' => 'kbd-join',
	),
	'+');
	$parts = phutil_implode_html($glue, $parts);
	}

	return $this->getEngine()->storeText($parts);
	}

	}

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