PhabricatorRemarkupRuleProxyImage.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 PhabricatorRemarkupRuleProxyImage
	extends PhutilRemarkupRule {

	public function apply($text) {

	$filetypes = '(?:\.jpe?g\|.png\|.gif)';

	$text = preg_replace_callback(
	'@[<](\w{3,}://.+?'.$filetypes.')[>]@',
	array($this, 'markupProxyImage'),
	$text);

	$text = preg_replace_callback(
	'@(?<=^\|\s)(\w{3,}://\S+'.$filetypes.')(?=\s\|$)@',
	array($this, 'markupProxyImage'),
	$text);

	return $text;
	}

	public function markupProxyImage($matches) {

	$uri = PhabricatorFileProxyImage::getProxyImageURI($matches[1]);

	return $this->getEngine()->storeText(
	phutil_render_tag(
	'a',
	array(
	'href' => $uri,
	'target' => '_blank',
	),
	phutil_render_tag(
	'img',
	array(
	'src' => $uri,
	'class' => 'remarkup-proxy-image',
	))));
	}

	}