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PhutilRainbowSyntaxHighlighter.php
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			<?php

			/**
			* Highlights source code with a rainbow of colors, regardless of the language.
			* This highlighter is useless, absurd, and extremely slow.
			*/
			final class PhutilRainbowSyntaxHighlighter extends Phobject {

			private $config = array();

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

			public function getHighlightFuture($source) {

			$color = 0;
			$colors = array(
			'rbw_r',
			'rbw_o',
			'rbw_y',
			'rbw_g',
			'rbw_b',
			'rbw_i',
			'rbw_v',
			);

			$result = array();
			foreach (phutil_utf8v($source) as $character) {
			if ($character == ' ' \|\| $character == "\n") {
			$result[] = $character;
			continue;
			}
			$result[] = phutil_tag(
			'span',
			array('class' => $colors[$color]),
			$character);
			$color = ($color + 1) % count($colors);
			}

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

			}