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PhutilLexerSyntaxHighlighter.php
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Tue, Jun 3, 02:56

PhutilLexerSyntaxHighlighter.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.
*/
/**
* @group markup
*/
final class PhutilLexerSyntaxHighlighter extends PhutilSyntaxHighlighter {
private $config = array();
public function setConfig($key, $value) {
$this->config[$key] = $value;
return $this;
}
public function getHighlightFuture($source) {
$strip = false;
$state = 'start';
$lang = idx($this->config, 'language');
if ($lang == 'php') {
if (strpos($source, '<?') === false) {
$state = 'php';
}
}
$lexer = idx($this->config, 'lexer');
$tokens = $lexer->getTokens($source, $state);
$tokens = $lexer->mergeTokens($tokens);
$result = array();
foreach ($tokens as $token) {
list($type, $value, $context) = $token;
$value = phutil_escape_html($value);
$data_name = null;
switch ($type) {
case 'nc':
case 'nf':
case 'na':
$data_name = ' data-symbol-name="'.$value.'"';
break;
}
$data_context = null;
if ($context) {
$context = phutil_escape_html($context);
$data_context = ' data-symbol-context="'.$context.'"';
}
$class_name = null;
if ($type) {
$class_name = ' class="'.$type.'"';
}
if (strpos($value, "\n") !== false) {
$value = explode("\n", $value);
} else {
$value = array($value);
}
foreach ($value as $part) {
if (strlen($part)) {
if ($class_name) {
$result[] =
'<span'.$class_name.$data_context.$data_name.'>'.
$part.
'</span>';
} else {
$result[] = $part;
}
}
$result[] = "\n";
}
// Throw away the last "\n".
array_pop($result);
}
$result = implode('', $result);
return new ImmediateFuture($result);
}
}

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