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libphutil/src/markup/engine/remarkup/markuprule/PhutilRemarkupRuleDocumentLink.php
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PhutilRemarkupRuleDocumentLink.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 PhutilRemarkupRuleDocumentLink
extends PhutilRemarkupRule {
public function apply($text) {
$text = preg_replace_callback(
'@\B\\[\\[([^|\\]]+)(?:\\|([^\\]]+))?\\]\\]\B@U',
array($this, 'markupDocumentLink'),
$text);
return $text;
}
protected function renderHyperlink($link, $name) {
return phutil_render_tag(
'a',
array(
'href' => $link,
'target' => '_blank',
),
phutil_escape_html($name));
}
public function markupDocumentLink($matches) {
$uri = trim($matches[1]);
$name = trim(idx($matches, 2, $uri));
// If whatever is being linked to begins with "/" or has "://", treat it
// as a URI instead of a wiki page.
$is_uri = preg_match('@(^/)|(://)@', $uri);
if ($is_uri) {
$protocols = $this->getEngine()->getConfig(
'uri.allowed-protocols',
array());
$protocol = id(new PhutilURI($uri))->getProtocol();
if (!idx($protocols, $protocol)) {
// Don't treat this as a URI if it's not an allowed protocol.
$is_uri = false;
}
}
if (!$is_uri) {
return $matches[0];
}
return $this->getEngine()->storeText($this->renderHyperlink($uri, $name));
}
}
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