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libphutil/src/markup/engine/remarkup/blockrule/remarkupcode/PhutilRemarkupEngineRemarkupCodeBlockRule.php
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PhutilRemarkupEngineRemarkupCodeBlockRule.php
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<?php
/*
* Copyright 2011 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
*/
class PhutilRemarkupEngineRemarkupCodeBlockRule
extends PhutilRemarkupEngineBlockRule {
public function getBlockPattern() {
return "/^\s{2,}/";
}
public function shouldMatchBlock($block) {
if (!preg_match($this->getBlockPattern(), $block)) {
return false;
}
if (preg_match('@^[a-z]+://\S+$@', trim($block))) {
return false;
}
return true;
}
public function shouldMergeBlocks() {
return true;
}
public function markupText($text) {
$lines = explode("\n", $text);
$lang = 'php';
$aux_class = '';
do {
$first_line = reset($lines);
$matches = null;
if (preg_match('/^\s{2,}lang\s*=\s*(.*)$/i', $first_line, $matches)) {
$lang = $matches[1];
array_shift($lines);
continue;
}
if (preg_match('/^\s{2,}COUNTEREXAMPLE$/i', $first_line, $matches)) {
$aux_class = ' remarkup-counterexample';
array_shift($lines);
continue;
}
} while (false);
// Normalize the text back to a 0-level indent.
$min_indent = 80;
foreach ($lines as $line) {
for ($ii = 0; $ii < strlen($line); $ii++) {
if ($line[$ii] != ' ') {
$min_indent = min($ii, $min_indent);
break;
}
}
}
if ($min_indent) {
$indent_string = str_repeat(' ', $min_indent);
$text = preg_replace(
'/^'.$indent_string.'/m',
'',
implode("\n", $lines));
}
$engine = new PhutilDefaultSyntaxHighlighterEngine();
$engine->setConfig(
'pygments.enabled',
$this->getEngine()->getConfig('pygments.enabled'));
return
'<code class="remarkup-code'.$aux_class.'">'.
$engine->highlightSource($lang, $text).
'</code>';
}
}
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