PhutilRainbowSyntaxHighlighter.php
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	<?php

	/*
	* Copyright 2012 Facebook, Inc.
	*
	* Licensed under the Apache License, Version 2.0 (the "License");
	* you may not use this file except in compliance with the License.
	* You may obtain a copy of the License at
	*
	* http://www.apache.org/licenses/LICENSE-2.0
	*
	* Unless required by applicable law or agreed to in writing, software
	* distributed under the License is distributed on an "AS IS" BASIS,
	* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
	* See the License for the specific language governing permissions and
	* limitations under the License.
	*/

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

	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;
	}
	$result[] =
	'<span class="'.$colors[$color].'">'.
	phutil_escape_html($character).
	'</span>';
	$color = ($color + 1) % count($colors);
	}

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