PhabricatorRemarkupRuleIcon.php
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PhabricatorRemarkupRuleIcon.php
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			<?php

			final class PhabricatorRemarkupRuleIcon
			extends PhutilRemarkupRule {

			public function getPriority() {
			return 50.0;
			}

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

			public function markupIcon($matches) {
			$extra = idx($matches, 1);

			// We allow various forms, like these:
			//
			// {icon}
			// {icon camera}
			// {icon,camera}
			// {icon camera color=red}
			// {icon, camera, color=red}

			$extra = ltrim($extra, ", \n");
			$extra = preg_split('/[\s,]+/', $extra, 2);

			// Choose some arbitrary default icon so that previews render in a mostly
			// reasonable way as you're typing the syntax.
			$icon = idx($extra, 0, 'paw');

			$defaults = array(
			'color' => null,
			);

			$options = idx($extra, 1, '');
			$parser = new PhutilSimpleOptions();
			$options = $parser->parse($options) + $defaults;

			// NOTE: We're validating icon and color names to prevent users from
			// adding arbitrary CSS classes to the document. Although this probably
			// isn't dangerous, it's safer to validate.

			static $icon_names;
			if (!$icon_names) {
			$icon_names = array_fuse(PHUIIconView::getFontIcons());
			}

			static $color_names;
			if (!$color_names) {
			$color_names = array_fuse(PHUIIconView::getFontIconColors());
			}

			if (empty($icon_names['fa-'.$icon])) {
			$icon = 'paw';
			}

			$color = $options['color'];
			if (empty($color_names[$color])) {
			$color = null;
			}

			$icon_view = id(new PHUIIconView())
			->setIconFont('fa-'.$icon, $color);

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

			}