Differential D20977 Diff 49988 src/infrastructure/markup/syntax/highlighter/PhutilInvisibleSyntaxHighlighter.php

Changeset View

Standalone View

				<?php

				final class PhutilInvisibleSyntaxHighlighter extends Phobject {

				private $config = array();

				public function setConfig($key, $value) {
				$this->config[$key] = $value;
				return $this;
				}

				public function getHighlightFuture($source) {
				$keys = array_map('chr', range(0x0, 0x1F));
				$vals = array_map(
				array($this, 'decimalToHtmlEntityDecoded'), range(0x2400, 0x241F));

				$invisible = array_combine($keys, $vals);

				$result = array();
				foreach (str_split($source) as $character) {
				if (isset($invisible[$character])) {
				$result[] = phutil_tag(
				'span',
				array('class' => 'invisible'),
				$invisible[$character]);

				if ($character === "\n") {
				$result[] = $character;
				}
				} else {
				$result[] = $character;
				}
				}

				$result = phutil_implode_html('', $result);
				return new ImmediateFuture($result);
				}

				private function decimalToHtmlEntityDecoded($dec) {
				return html_entity_decode("&#{$dec};");
				}

				}