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1378 lines
39 KiB
1378 lines
39 KiB
5 years ago
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<?php
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/**
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* Parser
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*
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* @copyright Copyright (c) 2012 SegmentFault Team. (http://segmentfault.com)
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* @author Joyqi <joyqi@segmentfault.com>
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* @license BSD License
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*/
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class HyperDown
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{
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/**
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* _whiteList
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*
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* @var string
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*/
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public $_commonWhiteList = 'kbd|b|i|strong|em|sup|sub|br|code|del|a|hr|small';
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/**
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* _specialWhiteList
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*
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* @var mixed
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* @access private
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*/
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public $_specialWhiteList = array(
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'table' => 'table|tbody|thead|tfoot|tr|td|th'
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);
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/**
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* _footnotes
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*
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* @var array
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*/
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public $_footnotes;
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/**
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* _blocks
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*
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* @var array
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*/
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private $_blocks;
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/**
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* _current
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*
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* @var string
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*/
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private $_current;
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/**
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* _pos
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*
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* @var int
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*/
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private $_pos;
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/**
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* _definitions
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*
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* @var array
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*/
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public $_definitions;
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/**
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* @var array
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*/
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private $_hooks = array();
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/**
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* @var array
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*/
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private $_holders;
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/**
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* @var string
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*/
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private $_uniqid;
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/**
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* @var int
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*/
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private $_id;
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/**
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* @var bool
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*/
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private $_html = false;
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/**
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* makeHtml
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*
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* @param mixed $text
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* @return string
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*/
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public function makeHtml($text)
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{
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$this->_footnotes = array();
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$this->_definitions = array();
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$this->_holders = array();
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$this->_uniqid = md5(uniqid());
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$this->_id = 0;
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$text = $this->initText($text);
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$html = $this->parse($text);
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$html = $this->makeFootnotes($html);
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return $this->call('makeHtml', $html);
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}
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/**
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* @param $html
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*/
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public function enableHtml($html = true)
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{
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$this->_html = $html;
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}
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/**
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* @param $type
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* @param $callback
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*/
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public function hook($type, $callback)
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{
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$this->_hooks[$type][] = $callback;
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}
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/**
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* @param $str
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* @return string
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*/
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public function makeHolder($str)
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{
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$key = "\r" . $this->_uniqid . $this->_id . "\r";
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$this->_id ++;
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$this->_holders[$key] = $str;
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return $key;
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}
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/**
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* @param $text
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* @return mixed
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*/
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private function initText($text)
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{
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$text = str_replace(array("\t", "\r"), array(' ', ''), $text);
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return $text;
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}
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/**
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* @param $html
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* @return string
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*/
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private function makeFootnotes($html)
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{
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if (count($this->_footnotes) > 0) {
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$html .= '<div class="footnotes"><hr><ol>';
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$index = 1;
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while ($val = array_shift($this->_footnotes)) {
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if (is_string($val)) {
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$val .= " <a href=\"#fnref-{$index}\" class=\"footnote-backref\">↩</a>";
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} else {
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$val[count($val) - 1] .= " <a href=\"#fnref-{$index}\" class=\"footnote-backref\">↩</a>";
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$val = count($val) > 1 ? $this->parse(implode("\n", $val)) : $this->parseInline($val[0]);
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}
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$html .= "<li id=\"fn-{$index}\">{$val}</li>";
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$index ++;
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}
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$html .= '</ol></div>';
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}
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return $html;
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}
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/**
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* parse
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*
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* @param string $text
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* @param bool $inline
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* @return string
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*/
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private function parse($text, $inline = false)
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{
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$blocks = $this->parseBlock($text, $lines);
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$html = '';
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foreach ($blocks as $block) {
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list ($type, $start, $end, $value) = $block;
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$extract = array_slice($lines, $start, $end - $start + 1);
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$method = 'parse' . ucfirst($type);
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$extract = $this->call('before' . ucfirst($method), $extract, $value);
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$result = $this->{$method}($extract, $value);
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$result = $this->call('after' . ucfirst($method), $result, $value);
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$html .= $result;
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}
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// inline mode for single normal block
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if ($inline && count($blocks) == 1 && $blocks[0][0] == 'normal') {
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// remove p tag
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$html = preg_replace("/^\s*<p>(.*)<\/p>\s*$/", "\\1", $html);
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}
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return $html;
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}
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/**
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* @param $text
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* @param $clearHolders
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* @return string
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*/
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private function releaseHolder($text, $clearHolders = true)
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{
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$deep = 0;
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while (strpos($text, "\r") !== false && $deep < 10) {
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$text = str_replace(array_keys($this->_holders), array_values($this->_holders), $text);
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$deep ++;
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}
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if ($clearHolders) {
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$this->_holders = array();
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}
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return $text;
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}
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/**
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* @param $type
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* @param $value
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* @return mixed
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*/
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public function call($type, $value)
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{
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if (empty($this->_hooks[$type])) {
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return $value;
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}
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$args = func_get_args();
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$args = array_slice($args, 1);
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foreach ($this->_hooks[$type] as $callback) {
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$value = call_user_func_array($callback, $args);
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$args[0] = $value;
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}
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return $value;
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}
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/**
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* parseInline
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*
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||
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* @param string $text
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* @param string $whiteList
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* @param bool $clearHolders
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* @param bool $enableAutoLink
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* @return string
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*/
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public function parseInline($text, $whiteList = '', $clearHolders = true, $enableAutoLink = true)
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{
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$self = $this;
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$text = $this->call('beforeParseInline', $text);
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// code
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$text = preg_replace_callback(
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"/(^|[^\\\])(`+)(.+?)\\2/",
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function ($matches) use ($self) {
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return $matches[1] . $self->makeHolder(
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'<code>' . htmlspecialchars($matches[3]) . '</code>'
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);
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},
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$text
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);
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// mathjax
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$text = preg_replace_callback(
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"/(^|[^\\\])(\\$+)(.+?)\\2/",
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function ($matches) use ($self) {
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return $matches[1] . $self->makeHolder(
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$matches[2] . htmlspecialchars($matches[3]) . $matches[2]
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);
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},
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$text
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);
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// escape
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$text = preg_replace_callback(
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"/\\\(.)/u",
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function ($matches) use ($self) {
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$escaped = htmlspecialchars($matches[1]);
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$escaped = str_replace('$', '$', $escaped);
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return $self->makeHolder($escaped);
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},
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$text
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);
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||
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// link
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$text = preg_replace_callback(
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"/<(https?:\/\/.+)>/i",
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function ($matches) use ($self) {
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$url = $self->cleanUrl($matches[1]);
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$link = $self->call('parseLink', $matches[1]);
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return $self->makeHolder(
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"<a href=\"{$url}\">{$link}</a>"
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);
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},
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$text
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);
|
||
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||
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// encode unsafe tags
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||
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$text = preg_replace_callback(
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"/<(\/?)([a-z0-9-]+)(\s+[^>]*)?>/i",
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||
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function ($matches) use ($self, $whiteList) {
|
||
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if (false !== stripos(
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||
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'|' . $self->_commonWhiteList . '|' . $whiteList . '|', '|' . $matches[2] . '|'
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)) {
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return $self->makeHolder($matches[0]);
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} else {
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return htmlspecialchars($matches[0]);
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}
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},
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||
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$text
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||
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);
|
||
|
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||
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$text = str_replace(array('<', '>'), array('<', '>'), $text);
|
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|
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||
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// footnote
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||
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$text = preg_replace_callback(
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||
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"/\[\^((?:[^\]]|\\\\\]|\\\\\[)+?)\]/",
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function ($matches) use ($self) {
|
||
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$id = array_search($matches[1], $self->_footnotes);
|
||
|
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||
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if (false === $id) {
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$id = count($self->_footnotes) + 1;
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$self->_footnotes[$id] = $self->parseInline($matches[1], '', false);
|
||
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}
|
||
|
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||
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return $self->makeHolder(
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||
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"<sup id=\"fnref-{$id}\"><a href=\"#fn-{$id}\" class=\"footnote-ref\">{$id}</a></sup>"
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||
|
);
|
||
|
},
|
||
|
$text
|
||
|
);
|
||
|
|
||
|
// image
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||
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$text = preg_replace_callback(
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||
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"/!\[((?:[^\]]|\\\\\]|\\\\\[)*?)\]\(((?:[^\)]|\\\\\)|\\\\\()+?)\)/",
|
||
|
function ($matches) use ($self) {
|
||
|
$escaped = htmlspecialchars($self->escapeBracket($matches[1]));
|
||
|
$url = $self->escapeBracket($matches[2]);
|
||
|
$url = $self->cleanUrl($url);
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||
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return $self->makeHolder(
|
||
|
"<img src=\"{$url}\" alt=\"{$escaped}\" title=\"{$escaped}\">"
|
||
|
);
|
||
|
},
|
||
|
$text
|
||
|
);
|
||
|
|
||
|
$text = preg_replace_callback(
|
||
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"/!\[((?:[^\]]|\\\\\]|\\\\\[)*?)\]\[((?:[^\]]|\\\\\]|\\\\\[)+?)\]/",
|
||
|
function ($matches) use ($self) {
|
||
|
$escaped = htmlspecialchars($self->escapeBracket($matches[1]));
|
||
|
|
||
|
$result = isset( $self->_definitions[$matches[2]] ) ?
|
||
|
"<img src=\"{$self->_definitions[$matches[2]]}\" alt=\"{$escaped}\" title=\"{$escaped}\">"
|
||
|
: $escaped;
|
||
|
|
||
|
return $self->makeHolder($result);
|
||
|
},
|
||
|
$text
|
||
|
);
|
||
|
|
||
|
// link
|
||
|
$text = preg_replace_callback(
|
||
|
"/\[((?:[^\]]|\\\\\]|\\\\\[)+?)\]\(((?:[^\)]|\\\\\)|\\\\\()+?)\)/",
|
||
|
function ($matches) use ($self) {
|
||
|
$escaped = $self->parseInline(
|
||
|
$self->escapeBracket($matches[1]), '', false, false
|
||
|
);
|
||
|
$url = $self->escapeBracket($matches[2]);
|
||
|
$url = $self->cleanUrl($url);
|
||
|
return $self->makeHolder("<a href=\"{$url}\">{$escaped}</a>");
|
||
|
},
|
||
|
$text
|
||
|
);
|
||
|
|
||
|
$text = preg_replace_callback(
|
||
|
"/\[((?:[^\]]|\\\\\]|\\\\\[)+?)\]\[((?:[^\]]|\\\\\]|\\\\\[)+?)\]/",
|
||
|
function ($matches) use ($self) {
|
||
|
$escaped = $self->parseInline(
|
||
|
$self->escapeBracket($matches[1]), '', false
|
||
|
);
|
||
|
$result = isset( $self->_definitions[$matches[2]] ) ?
|
||
|
"<a href=\"{$self->_definitions[$matches[2]]}\">{$escaped}</a>"
|
||
|
: $escaped;
|
||
|
|
||
|
return $self->makeHolder($result);
|
||
|
},
|
||
|
$text
|
||
|
);
|
||
|
|
||
|
// strong and em and some fuck
|
||
|
$text = $this->parseInlineCallback($text);
|
||
|
$text = preg_replace(
|
||
|
"/<([_a-z0-9-\.\+]+@[^@]+\.[a-z]{2,})>/i",
|
||
|
"<a href=\"mailto:\\1\">\\1</a>",
|
||
|
$text
|
||
|
);
|
||
|
|
||
|
// autolink url
|
||
|
if ($enableAutoLink) {
|
||
|
$text = preg_replace_callback(
|
||
|
"/(^|[^\"])((https?):[\p{L}_0-9-\.\/%#!@\?\+=~\|\,&\(\)]+)($|[^\"])/iu",
|
||
|
function ($matches) use ($self) {
|
||
|
$link = $self->call('parseLink', $matches[2]);
|
||
|
return "{$matches[1]}<a href=\"{$matches[2]}\">{$link}</a>{$matches[4]}";
|
||
|
},
|
||
|
$text
|
||
|
);
|
||
|
}
|
||
|
|
||
|
$text = $this->call('afterParseInlineBeforeRelease', $text);
|
||
|
$text = $this->releaseHolder($text, $clearHolders);
|
||
|
|
||
|
$text = $this->call('afterParseInline', $text);
|
||
|
|
||
|
return $text;
|
||
|
}
|
||
|
|
||
|
/**
|
||
|
* @param $text
|
||
|
* @return mixed
|
||
|
*/
|
||
|
public function parseInlineCallback($text)
|
||
|
{
|
||
|
$self = $this;
|
||
|
|
||
|
$text = preg_replace_callback(
|
||
|
"/(\*{3})(.+?)\\1/",
|
||
|
function ($matches) use ($self) {
|
||
|
return '<strong><em>' .
|
||
|
$self->parseInlineCallback($matches[2]) .
|
||
|
'</em></strong>';
|
||
|
},
|
||
|
$text
|
||
|
);
|
||
|
|
||
|
$text = preg_replace_callback(
|
||
|
"/(\*{2})(.+?)\\1/",
|
||
|
function ($matches) use ($self) {
|
||
|
return '<strong>' .
|
||
|
$self->parseInlineCallback($matches[2]) .
|
||
|
'</strong>';
|
||
|
},
|
||
|
$text
|
||
|
);
|
||
|
|
||
|
$text = preg_replace_callback(
|
||
|
"/(\*)(.+?)\\1/",
|
||
|
function ($matches) use ($self) {
|
||
|
return '<em>' .
|
||
|
$self->parseInlineCallback($matches[2]) .
|
||
|
'</em>';
|
||
|
},
|
||
|
$text
|
||
|
);
|
||
|
|
||
|
$text = preg_replace_callback(
|
||
|
"/(\s+|^)(_{3})(.+?)\\2(\s+|$)/",
|
||
|
function ($matches) use ($self) {
|
||
|
return $matches[1] . '<strong><em>' .
|
||
|
$self->parseInlineCallback($matches[3]) .
|
||
|
'</em></strong>' . $matches[4];
|
||
|
},
|
||
|
$text
|
||
|
);
|
||
|
|
||
|
$text = preg_replace_callback(
|
||
|
"/(\s+|^)(_{2})(.+?)\\2(\s+|$)/",
|
||
|
function ($matches) use ($self) {
|
||
|
return $matches[1] . '<strong>' .
|
||
|
$self->parseInlineCallback($matches[3]) .
|
||
|
'</strong>' . $matches[4];
|
||
|
},
|
||
|
$text
|
||
|
);
|
||
|
|
||
|
$text = preg_replace_callback(
|
||
|
"/(\s+|^)(_)(.+?)\\2(\s+|$)/",
|
||
|
function ($matches) use ($self) {
|
||
|
return $matches[1] . '<em>' .
|
||
|
$self->parseInlineCallback($matches[3]) .
|
||
|
'</em>' . $matches[4];
|
||
|
},
|
||
|
$text
|
||
|
);
|
||
|
|
||
|
$text = preg_replace_callback(
|
||
|
"/(~{2})(.+?)\\1/",
|
||
|
function ($matches) use ($self) {
|
||
|
return '<del>' .
|
||
|
$self->parseInlineCallback($matches[2]) .
|
||
|
'</del>';
|
||
|
},
|
||
|
$text
|
||
|
);
|
||
|
|
||
|
return $text;
|
||
|
}
|
||
|
|
||
|
/**
|
||
|
* parseBlock
|
||
|
*
|
||
|
* @param string $text
|
||
|
* @param array $lines
|
||
|
* @return array
|
||
|
*/
|
||
|
private function parseBlock($text, &$lines)
|
||
|
{
|
||
|
$lines = explode("\n", $text);
|
||
|
$this->_blocks = array();
|
||
|
$this->_current = 'normal';
|
||
|
$this->_pos = -1;
|
||
|
$special = implode("|", array_keys($this->_specialWhiteList));
|
||
|
$emptyCount = 0;
|
||
|
|
||
|
// analyze by line
|
||
|
foreach ($lines as $key => $line) {
|
||
|
$block = $this->getBlock();
|
||
|
|
||
|
// code block is special
|
||
|
if (preg_match("/^(\s*)(~{3,}|`{3,})([^`~]*)$/i", $line, $matches)) {
|
||
|
if ($this->isBlock('code')) {
|
||
|
$isAfterList = $block[3][2];
|
||
|
|
||
|
if ($isAfterList) {
|
||
|
$this->combineBlock()
|
||
|
->setBlock($key);
|
||
|
} else {
|
||
|
$this->setBlock($key)
|
||
|
->endBlock();
|
||
|
}
|
||
|
} else {
|
||
|
$isAfterList = false;
|
||
|
|
||
|
if ($this->isBlock('list')) {
|
||
|
$space = $block[3];
|
||
|
|
||
|
$isAfterList = ($space > 0 && strlen($matches[1]) >= $space)
|
||
|
|| strlen($matches[1]) > $space;
|
||
|
}
|
||
|
|
||
|
$this->startBlock('code', $key, array(
|
||
|
$matches[1], $matches[3], $isAfterList
|
||
|
));
|
||
|
}
|
||
|
|
||
|
continue;
|
||
|
} else if ($this->isBlock('code')) {
|
||
|
$this->setBlock($key);
|
||
|
continue;
|
||
|
}
|
||
|
|
||
|
// super html mode
|
||
|
if ($this->_html) {
|
||
|
if (preg_match("/^(\s*)!!!(\s*)$/", $line, $matches)) {
|
||
|
if ($this->isBlock('shtml')) {
|
||
|
$this->setBlock($key)->endBlock();
|
||
|
} else {
|
||
|
$this->startBlock('shtml', $key);
|
||
|
}
|
||
|
|
||
|
continue;
|
||
|
} else if ($this->isBlock('shtml')) {
|
||
|
$this->setBlock($key);
|
||
|
continue;
|
||
|
}
|
||
|
}
|
||
|
|
||
|
// mathjax mode
|
||
|
if (preg_match("/^(\s*)\\$\\$(\s*)$/", $line, $matches)) {
|
||
|
if ($this->isBlock('math')) {
|
||
|
$this->setBlock($key)->endBlock();
|
||
|
} else {
|
||
|
$this->startBlock('math', $key);
|
||
|
}
|
||
|
|
||
|
continue;
|
||
|
} else if ($this->isBlock('math')) {
|
||
|
$this->setBlock($key);
|
||
|
continue;
|
||
|
}
|
||
|
|
||
|
// html block is special too
|
||
|
if (preg_match("/^\s*<({$special})(\s+[^>]*)?>/i", $line, $matches)) {
|
||
|
$tag = strtolower($matches[1]);
|
||
|
if (!$this->isBlock('html', $tag) && !$this->isBlock('pre')) {
|
||
|
$this->startBlock('html', $key, $tag);
|
||
|
}
|
||
|
|
||
|
continue;
|
||
|
} else if (preg_match("/<\/({$special})>\s*$/i", $line, $matches)) {
|
||
|
$tag = strtolower($matches[1]);
|
||
|
|
||
|
if ($this->isBlock('html', $tag)) {
|
||
|
$this->setBlock($key)
|
||
|
->endBlock();
|
||
|
}
|
||
|
|
||
|
continue;
|
||
|
} else if ($this->isBlock('html')) {
|
||
|
$this->setBlock($key);
|
||
|
continue;
|
||
|
}
|
||
|
|
||
|
switch (true) {
|
||
|
// pre block
|
||
|
case preg_match("/^ {4}/", $line):
|
||
|
$emptyCount = 0;
|
||
|
|
||
|
if ($this->isBlock('pre') || $this->isBlock('list')) {
|
||
|
$this->setBlock($key);
|
||
|
} else if ($this->isBlock('normal')) {
|
||
|
$this->startBlock('pre', $key);
|
||
|
}
|
||
|
break;
|
||
|
|
||
|
// list
|
||
|
case preg_match("/^(\s*)((?:[0-9a-z]+\.)|\-|\+|\*)\s+/", $line, $matches):
|
||
|
$space = strlen($matches[1]);
|
||
|
$emptyCount = 0;
|
||
|
|
||
|
// opened
|
||
|
if ($this->isBlock('list')) {
|
||
|
$this->setBlock($key, $space);
|
||
|
} else {
|
||
|
$this->startBlock('list', $key, $space);
|
||
|
}
|
||
|
break;
|
||
|
|
||
|
// footnote
|
||
|
case preg_match("/^\[\^((?:[^\]]|\\]|\\[)+?)\]:/", $line, $matches):
|
||
|
$space = strlen($matches[0]) - 1;
|
||
|
$this->startBlock('footnote', $key, array(
|
||
|
$space, $matches[1]
|
||
|
));
|
||
|
break;
|
||
|
|
||
|
// definition
|
||
|
case preg_match("/^\s*\[((?:[^\]]|\\]|\\[)+?)\]:\s*(.+)$/", $line, $matches):
|
||
|
$this->_definitions[$matches[1]] = $this->cleanUrl($matches[2]);
|
||
|
$this->startBlock('definition', $key)
|
||
|
->endBlock();
|
||
|
break;
|
||
|
|
||
|
// block quote
|
||
|
case preg_match("/^\s*>/", $line):
|
||
|
if ($this->isBlock('quote')) {
|
||
|
$this->setBlock($key);
|
||
|
} else {
|
||
|
$this->startBlock('quote', $key);
|
||
|
}
|
||
|
break;
|
||
|
|
||
|
// table
|
||
|
case preg_match("/^((?:(?:(?:[ :]*\-[ :]*)+(?:\||\+))|(?:(?:\||\+)(?:[ :]*\-[ :]*)+)|(?:(?:[ :]*\-[ :]*)+(?:\||\+)(?:[ :]*\-[ :]*)+))+)$/", $line, $matches):
|
||
|
if ($this->isBlock('table')) {
|
||
|
$block[3][0][] = $block[3][2];
|
||
|
$block[3][2] ++;
|
||
|
$this->setBlock($key, $block[3]);
|
||
|
} else {
|
||
|
$head = 0;
|
||
|
|
||
|
if (empty($block) ||
|
||
|
$block[0] != 'normal' ||
|
||
|
preg_match("/^\s*$/", $lines[$block[2]])) {
|
||
|
$this->startBlock('table', $key);
|
||
|
} else {
|
||
|
$head = 1;
|
||
|
$this->backBlock(1, 'table');
|
||
|
}
|
||
|
|
||
|
if ($matches[1][0] == '|') {
|
||
|
$matches[1] = substr($matches[1], 1);
|
||
|
|
||
|
if ($matches[1][strlen($matches[1]) - 1] == '|') {
|
||
|
$matches[1] = substr($matches[1], 0, -1);
|
||
|
}
|
||
|
}
|
||
|
|
||
|
$rows = preg_split("/(\+|\|)/", $matches[1]);
|
||
|
$aligns = array();
|
||
|
foreach ($rows as $row) {
|
||
|
$align = 'none';
|
||
|
|
||
|
if (preg_match("/^\s*(:?)\-+(:?)\s*$/", $row, $matches)) {
|
||
|
if (!empty($matches[1]) && !empty($matches[2])) {
|
||
|
$align = 'center';
|
||
|
} else if (!empty($matches[1])) {
|
||
|
$align = 'left';
|
||
|
} else if (!empty($matches[2])) {
|
||
|
$align = 'right';
|
||
|
}
|
||
|
}
|
||
|
|
||
|
$aligns[] = $align;
|
||
|
}
|
||
|
|
||
|
$this->setBlock($key, array(array($head), $aligns, $head + 1));
|
||
|
}
|
||
|
break;
|
||
|
|
||
|
// single heading
|
||
|
case preg_match("/^(#+)(.*)$/", $line, $matches):
|
||
|
$num = min(strlen($matches[1]), 6);
|
||
|
$this->startBlock('sh', $key, $num)
|
||
|
->endBlock();
|
||
|
break;
|
||
|
|
||
|
// multi heading
|
||
|
case preg_match("/^\s*((=|-){2,})\s*$/", $line, $matches)
|
||
|
&& ($block && $block[0] == "normal" && !preg_match("/^\s*$/", $lines[$block[2]])): // check if last line isn't empty
|
||
|
if ($this->isBlock('normal')) {
|
||
|
$this->backBlock(1, 'mh', $matches[1][0] == '=' ? 1 : 2)
|
||
|
->setBlock($key)
|
||
|
->endBlock();
|
||
|
} else {
|
||
|
$this->startBlock('normal', $key);
|
||
|
}
|
||
|
break;
|
||
|
|
||
|
// hr
|
||
|
case preg_match("/^[-\*]{3,}\s*$/", $line):
|
||
|
$this->startBlock('hr', $key)
|
||
|
->endBlock();
|
||
|
break;
|
||
|
|
||
|
// normal
|
||
|
default:
|
||
|
if ($this->isBlock('list')) {
|
||
|
if (preg_match("/^(\s*)/", $line)) { // empty line
|
||
|
if ($emptyCount > 0) {
|
||
|
$this->startBlock('normal', $key);
|
||
|
} else {
|
||
|
$this->setBlock($key);
|
||
|
}
|
||
|
|
||
|
$emptyCount ++;
|
||
|
} else if ($emptyCount == 0) {
|
||
|
$this->setBlock($key);
|
||
|
} else {
|
||
|
$this->startBlock('normal', $key);
|
||
|
}
|
||
|
} else if ($this->isBlock('footnote')) {
|
||
|
preg_match("/^(\s*)/", $line, $matches);
|
||
|
if (strlen($matches[1]) >= $block[3][0]) {
|
||
|
$this->setBlock($key);
|
||
|
} else {
|
||
|
$this->startBlock('normal', $key);
|
||
|
}
|
||
|
} else if ($this->isBlock('table')) {
|
||
|
if (false !== strpos($line, '|')) {
|
||
|
$block[3][2] ++;
|
||
|
$this->setBlock($key, $block[3]);
|
||
|
} else {
|
||
|
$this->startBlock('normal', $key);
|
||
|
}
|
||
|
} else if ($this->isBlock('pre')) {
|
||
|
if (preg_match("/^\s*$/", $line)) {
|
||
|
if ($emptyCount > 0) {
|
||
|
$this->startBlock('normal', $key);
|
||
|
} else {
|
||
|
$this->setBlock($key);
|
||
|
}
|
||
|
|
||
|
$emptyCount ++;
|
||
|
} else {
|
||
|
$this->startBlock('normal', $key);
|
||
|
}
|
||
|
} else if ($this->isBlock('quote')) {
|
||
|
if (preg_match("/^(\s*)/", $line)) { // empty line
|
||
|
if ($emptyCount > 0) {
|
||
|
$this->startBlock('normal', $key);
|
||
|
} else {
|
||
|
$this->setBlock($key);
|
||
|
}
|
||
|
|
||
|
$emptyCount ++;
|
||
|
} else if ($emptyCount == 0) {
|
||
|
$this->setBlock($key);
|
||
|
} else {
|
||
|
$this->startBlock('normal', $key);
|
||
|
}
|
||
|
} else {
|
||
|
if (empty($block) || $block[0] != 'normal') {
|
||
|
$this->startBlock('normal', $key);
|
||
|
} else {
|
||
|
$this->setBlock($key);
|
||
|
}
|
||
|
}
|
||
|
break;
|
||
|
}
|
||
|
}
|
||
|
|
||
|
return $this->optimizeBlocks($this->_blocks, $lines);
|
||
|
}
|
||
|
|
||
|
/**
|
||
|
* @param array $blocks
|
||
|
* @param array $lines
|
||
|
* @return array
|
||
|
*/
|
||
|
private function optimizeBlocks(array $blocks, array $lines)
|
||
|
{
|
||
|
$blocks = $this->call('beforeOptimizeBlocks', $blocks, $lines);
|
||
|
|
||
|
$key = 0;
|
||
|
while (isset($blocks[$key])) {
|
||
|
$moved = false;
|
||
|
|
||
|
$block = &$blocks[$key];
|
||
|
$prevBlock = isset($blocks[$key - 1]) ? $blocks[$key - 1] : NULL;
|
||
|
$nextBlock = isset($blocks[$key + 1]) ? $blocks[$key + 1] : NULL;
|
||
|
|
||
|
list ($type, $from, $to) = $block;
|
||
|
|
||
|
if ('pre' == $type) {
|
||
|
$isEmpty = array_reduce($lines, function ($result, $line) {
|
||
|
return preg_match("/^\s*$/", $line) && $result;
|
||
|
}, true);
|
||
|
|
||
|
if ($isEmpty) {
|
||
|
$block[0] = $type = 'normal';
|
||
|
}
|
||
|
}
|
||
|
|
||
|
if ('normal' == $type) {
|
||
|
// combine two blocks
|
||
|
$types = array('list', 'quote');
|
||
|
|
||
|
if ($from == $to && preg_match("/^\s*$/", $lines[$from])
|
||
|
&& !empty($prevBlock) && !empty($nextBlock)) {
|
||
|
if ($prevBlock[0] == $nextBlock[0] && in_array($prevBlock[0], $types)) {
|
||
|
// combine 3 blocks
|
||
|
$blocks[$key - 1] = array(
|
||
|
$prevBlock[0], $prevBlock[1], $nextBlock[2], NULL
|
||
|
);
|
||
|
array_splice($blocks, $key, 2);
|
||
|
|
||
|
// do not move
|
||
|
$moved = true;
|
||
|
}
|
||
|
}
|
||
|
}
|
||
|
|
||
|
if (!$moved) {
|
||
|
$key ++;
|
||
|
}
|
||
|
}
|
||
|
|
||
|
return $this->call('afterOptimizeBlocks', $blocks, $lines);
|
||
|
}
|
||
|
|
||
|
/**
|
||
|
* parseCode
|
||
|
*
|
||
|
* @param array $lines
|
||
|
* @param array $parts
|
||
|
* @return string
|
||
|
*/
|
||
|
private function parseCode(array $lines, array $parts)
|
||
|
{
|
||
|
list ($blank, $lang) = $parts;
|
||
|
$lang = trim($lang);
|
||
|
$count = strlen($blank);
|
||
|
|
||
|
if (!preg_match("/^[_a-z0-9-\+\#\:\.]+$/i", $lang)) {
|
||
|
$lang = NULL;
|
||
|
} else {
|
||
|
$parts = explode(':', $lang);
|
||
|
if (count($parts) > 1) {
|
||
|
list ($lang, $rel) = $parts;
|
||
|
$lang = trim($lang);
|
||
|
$rel = trim($rel);
|
||
|
}
|
||
|
}
|
||
|
|
||
|
$lines = array_map(function ($line) use ($count) {
|
||
|
return preg_replace("/^[ ]{{$count}}/", '', $line);
|
||
|
}, array_slice($lines, 1, -1));
|
||
|
$str = implode("\n", $lines);
|
||
|
|
||
|
return preg_match("/^\s*$/", $str) ? '' :
|
||
|
'<pre><code' . (!empty($lang) ? " class=\"{$lang}\"" : '')
|
||
|
. (!empty($rel) ? " rel=\"{$rel}\"" : '') . '>'
|
||
|
. htmlspecialchars($str) . '</code></pre>';
|
||
|
}
|
||
|
|
||
|
/**
|
||
|
* parsePre
|
||
|
*
|
||
|
* @param array $lines
|
||
|
* @return string
|
||
|
*/
|
||
|
private function parsePre(array $lines)
|
||
|
{
|
||
|
foreach ($lines as &$line) {
|
||
|
$line = htmlspecialchars(substr($line, 4));
|
||
|
}
|
||
|
$str = implode("\n", $lines);
|
||
|
|
||
|
return preg_match("/^\s*$/", $str) ? '' : '<pre><code>' . $str . '</code></pre>';
|
||
|
}
|
||
|
|
||
|
/**
|
||
|
* parseShtml
|
||
|
*
|
||
|
* @param array $lines
|
||
|
* @return string
|
||
|
*/
|
||
|
private function parseShtml(array $lines)
|
||
|
{
|
||
|
return trim(implode("\n", array_slice($lines, 1, -1)));
|
||
|
}
|
||
|
|
||
|
/**
|
||
|
* parseMath
|
||
|
*
|
||
|
* @param array $lines
|
||
|
* @return string
|
||
|
*/
|
||
|
private function parseMath(array $lines)
|
||
|
{
|
||
|
return '<p>' . htmlspecialchars(implode("\n", $lines)) . '</p>';
|
||
|
}
|
||
|
|
||
|
/**
|
||
|
* parseSh
|
||
|
*
|
||
|
* @param array $lines
|
||
|
* @param int $num
|
||
|
* @return string
|
||
|
*/
|
||
|
private function parseSh(array $lines, $num)
|
||
|
{
|
||
|
$line = $this->parseInline(trim($lines[0], '# '));
|
||
|
return preg_match("/^\s*$/", $line) ? '' : "<h{$num}>{$line}</h{$num}>";
|
||
|
}
|
||
|
|
||
|
/**
|
||
|
* parseMh
|
||
|
*
|
||
|
* @param array $lines
|
||
|
* @param int $num
|
||
|
* @return string
|
||
|
*/
|
||
|
private function parseMh(array $lines, $num)
|
||
|
{
|
||
|
return $this->parseSh($lines, $num);
|
||
|
}
|
||
|
|
||
|
/**
|
||
|
* parseQuote
|
||
|
*
|
||
|
* @param array $lines
|
||
|
* @return string
|
||
|
*/
|
||
|
private function parseQuote(array $lines)
|
||
|
{
|
||
|
foreach ($lines as &$line) {
|
||
|
$line = preg_replace("/^\s*> ?/", '', $line);
|
||
|
}
|
||
|
$str = implode("\n", $lines);
|
||
|
|
||
|
return preg_match("/^\s*$/", $str) ? '' : '<blockquote>' . $this->parse($str) . '</blockquote>';
|
||
|
}
|
||
|
|
||
|
/**
|
||
|
* parseList
|
||
|
*
|
||
|
* @param array $lines
|
||
|
* @return string
|
||
|
*/
|
||
|
private function parseList(array $lines)
|
||
|
{
|
||
|
$html = '';
|
||
|
$minSpace = 99999;
|
||
|
$rows = array();
|
||
|
|
||
|
// count levels
|
||
|
foreach ($lines as $key => $line) {
|
||
|
if (preg_match("/^(\s*)((?:[0-9a-z]+\.?)|\-|\+|\*)(\s+)(.*)$/", $line, $matches)) {
|
||
|
$space = strlen($matches[1]);
|
||
|
$type = false !== strpos('+-*', $matches[2]) ? 'ul' : 'ol';
|
||
|
$minSpace = min($space, $minSpace);
|
||
|
|
||
|
$rows[] = array($space, $type, $line, $matches[4]);
|
||
|
} else {
|
||
|
$rows[] = $line;
|
||
|
}
|
||
|
}
|
||
|
|
||
|
$found = false;
|
||
|
$secondMinSpace = 99999;
|
||
|
foreach ($rows as $row) {
|
||
|
if (is_array($row) && $row[0] != $minSpace) {
|
||
|
$secondMinSpace = min($secondMinSpace, $row[0]);
|
||
|
$found = true;
|
||
|
}
|
||
|
}
|
||
|
$secondMinSpace = $found ? $secondMinSpace : $minSpace;
|
||
|
|
||
|
$lastType = '';
|
||
|
$leftLines = array();
|
||
|
|
||
|
foreach ($rows as $row) {
|
||
|
if (is_array($row)) {
|
||
|
list ($space, $type, $line, $text) = $row;
|
||
|
|
||
|
if ($space != $minSpace) {
|
||
|
$leftLines[] = preg_replace("/^\s{" . $secondMinSpace . "}/", '', $line);
|
||
|
} else {
|
||
|
if (!empty($leftLines)) {
|
||
|
$html .= "<li>" . $this->parse(implode("\n", $leftLines), true) . "</li>";
|
||
|
}
|
||
|
|
||
|
if ($lastType != $type) {
|
||
|
if (!empty($lastType)) {
|
||
|
$html .= "</{$lastType}>";
|
||
|
}
|
||
|
|
||
|
$html .= "<{$type}>";
|
||
|
}
|
||
|
|
||
|
$leftLines = array($text);
|
||
|
$lastType = $type;
|
||
|
}
|
||
|
} else {
|
||
|
$leftLines[] = preg_replace("/^\s{" . $secondMinSpace . "}/", '', $row);
|
||
|
}
|
||
|
}
|
||
|
|
||
|
if (!empty($leftLines)) {
|
||
|
$html .= "<li>" . $this->parse(implode("\n", $leftLines), true) . "</li></{$lastType}>";
|
||
|
}
|
||
|
|
||
|
return $html;
|
||
|
}
|
||
|
|
||
|
/**
|
||
|
* @param array $lines
|
||
|
* @param array $value
|
||
|
* @return string
|
||
|
*/
|
||
|
private function parseTable(array $lines, array $value)
|
||
|
{
|
||
|
list ($ignores, $aligns) = $value;
|
||
|
$head = count($ignores) > 0 && array_sum($ignores) > 0;
|
||
|
|
||
|
$html = '<table>';
|
||
|
$body = $head ? NULL : true;
|
||
|
$output = false;
|
||
|
|
||
|
foreach ($lines as $key => $line) {
|
||
|
if (in_array($key, $ignores)) {
|
||
|
if ($head && $output) {
|
||
|
$head = false;
|
||
|
$body = true;
|
||
|
}
|
||
|
continue;
|
||
|
}
|
||
|
|
||
|
$line = trim($line);
|
||
|
$output = true;
|
||
|
|
||
|
if ($line[0] == '|') {
|
||
|
$line = substr($line, 1);
|
||
|
|
||
|
if ($line[strlen($line) - 1] == '|') {
|
||
|
$line = substr($line, 0, -1);
|
||
|
}
|
||
|
}
|
||
|
|
||
|
|
||
|
$rows = array_map(function ($row) {
|
||
|
if (preg_match("/^\s+$/", $row)) {
|
||
|
return ' ';
|
||
|
} else {
|
||
|
return trim($row);
|
||
|
}
|
||
|
}, explode('|', $line));
|
||
|
$columns = array();
|
||
|
$last = -1;
|
||
|
|
||
|
foreach ($rows as $row) {
|
||
|
if (strlen($row) > 0) {
|
||
|
$last ++;
|
||
|
$columns[$last] = array(
|
||
|
isset($columns[$last]) ? $columns[$last][0] + 1 : 1, $row
|
||
|
);
|
||
|
} else if (isset($columns[$last])) {
|
||
|
$columns[$last][0] ++;
|
||
|
} else {
|
||
|
$columns[0] = array(1, $row);
|
||
|
}
|
||
|
}
|
||
|
|
||
|
if ($head) {
|
||
|
$html .= '<thead>';
|
||
|
} else if ($body) {
|
||
|
$html .= '<tbody>';
|
||
|
}
|
||
|
|
||
|
$html .= '<tr>';
|
||
|
|
||
|
foreach ($columns as $key => $column) {
|
||
|
list ($num, $text) = $column;
|
||
|
$tag = $head ? 'th' : 'td';
|
||
|
|
||
|
$html .= "<{$tag}";
|
||
|
if ($num > 1) {
|
||
|
$html .= " colspan=\"{$num}\"";
|
||
|
}
|
||
|
|
||
|
if (isset($aligns[$key]) && $aligns[$key] != 'none') {
|
||
|
$html .= " align=\"{$aligns[$key]}\"";
|
||
|
}
|
||
|
|
||
|
$html .= '>' . $this->parseInline($text) . "</{$tag}>";
|
||
|
}
|
||
|
|
||
|
$html .= '</tr>';
|
||
|
|
||
|
if ($head) {
|
||
|
$html .= '</thead>';
|
||
|
} else if ($body) {
|
||
|
$body = false;
|
||
|
}
|
||
|
}
|
||
|
|
||
|
if ($body !== NULL) {
|
||
|
$html .= '</tbody>';
|
||
|
}
|
||
|
|
||
|
$html .= '</table>';
|
||
|
return $html;
|
||
|
}
|
||
|
|
||
|
/**
|
||
|
* parseHr
|
||
|
*
|
||
|
* @return string
|
||
|
*/
|
||
|
private function parseHr()
|
||
|
{
|
||
|
return '<hr>';
|
||
|
}
|
||
|
|
||
|
/**
|
||
|
* parseNormal
|
||
|
*
|
||
|
* @param array $lines
|
||
|
* @return string
|
||
|
*/
|
||
|
private function parseNormal(array $lines)
|
||
|
{
|
||
|
foreach ($lines as &$line) {
|
||
|
$line = $this->parseInline($line);
|
||
|
}
|
||
|
|
||
|
$str = trim(implode("\n", $lines));
|
||
|
$str = preg_replace("/(\n\s*){2,}/", "</p><p>", $str);
|
||
|
$str = preg_replace("/\n/", "<br>", $str);
|
||
|
|
||
|
return preg_match("/^\s*$/", $str) ? '' : "<p>{$str}</p>";
|
||
|
}
|
||
|
|
||
|
/**
|
||
|
* parseFootnote
|
||
|
*
|
||
|
* @param array $lines
|
||
|
* @param array $value
|
||
|
* @return string
|
||
|
*/
|
||
|
private function parseFootnote(array $lines, array $value)
|
||
|
{
|
||
|
list($space, $note) = $value;
|
||
|
$index = array_search($note, $this->_footnotes);
|
||
|
|
||
|
if (false !== $index) {
|
||
|
$lines[0] = preg_replace("/^\[\^((?:[^\]]|\\]|\\[)+?)\]:/", '', $lines[0]);
|
||
|
$this->_footnotes[$index] = $lines;
|
||
|
}
|
||
|
|
||
|
return '';
|
||
|
}
|
||
|
|
||
|
/**
|
||
|
* parseDefine
|
||
|
*
|
||
|
* @return string
|
||
|
*/
|
||
|
private function parseDefinition()
|
||
|
{
|
||
|
return '';
|
||
|
}
|
||
|
|
||
|
/**
|
||
|
* parseHtml
|
||
|
*
|
||
|
* @param array $lines
|
||
|
* @param string $type
|
||
|
* @return string
|
||
|
*/
|
||
|
private function parseHtml(array $lines, $type)
|
||
|
{
|
||
|
foreach ($lines as &$line) {
|
||
|
$line = $this->parseInline($line,
|
||
|
isset($this->_specialWhiteList[$type]) ? $this->_specialWhiteList[$type] : '');
|
||
|
}
|
||
|
|
||
|
return implode("\n", $lines);
|
||
|
}
|
||
|
|
||
|
/**
|
||
|
* @param $url
|
||
|
* @return string
|
||
|
*/
|
||
|
public function cleanUrl($url)
|
||
|
{
|
||
|
if (preg_match("/^\s*((http|https|ftp|mailto):[x80-xff_a-z0-9-\.\/%#!@\?\+=~\|\,&\(\)]+)/i", $url, $matches)) {
|
||
|
return $matches[1];
|
||
|
} else if (preg_match("/^\s*([x80-xff_a-z0-9-\.\/%#!@\?\+=~\|\,&]+)/i", $url, $matches)) {
|
||
|
return $matches[1];
|
||
|
} else {
|
||
|
return '#';
|
||
|
}
|
||
|
}
|
||
|
|
||
|
/**
|
||
|
* @param $str
|
||
|
* @return mixed
|
||
|
*/
|
||
|
public function escapeBracket($str)
|
||
|
{
|
||
|
return str_replace(
|
||
|
array('\[', '\]', '\(', '\)'), array('[', ']', '(', ')'), $str
|
||
|
);
|
||
|
}
|
||
|
|
||
|
/**
|
||
|
* startBlock
|
||
|
*
|
||
|
* @param mixed $type
|
||
|
* @param mixed $start
|
||
|
* @param mixed $value
|
||
|
* @return $this
|
||
|
*/
|
||
|
private function startBlock($type, $start, $value = NULL)
|
||
|
{
|
||
|
$this->_pos ++;
|
||
|
$this->_current = $type;
|
||
|
|
||
|
$this->_blocks[$this->_pos] = array($type, $start, $start, $value);
|
||
|
|
||
|
return $this;
|
||
|
}
|
||
|
|
||
|
/**
|
||
|
* endBlock
|
||
|
*
|
||
|
* @return $this
|
||
|
*/
|
||
|
private function endBlock()
|
||
|
{
|
||
|
$this->_current = 'normal';
|
||
|
return $this;
|
||
|
}
|
||
|
|
||
|
/**
|
||
|
* isBlock
|
||
|
*
|
||
|
* @param mixed $type
|
||
|
* @param mixed $value
|
||
|
* @return bool
|
||
|
*/
|
||
|
private function isBlock($type, $value = NULL)
|
||
|
{
|
||
|
return $this->_current == $type
|
||
|
&& (NULL === $value ? true : $this->_blocks[$this->_pos][3] == $value);
|
||
|
}
|
||
|
|
||
|
/**
|
||
|
* getBlock
|
||
|
*
|
||
|
* @return array
|
||
|
*/
|
||
|
private function getBlock()
|
||
|
{
|
||
|
return isset($this->_blocks[$this->_pos]) ? $this->_blocks[$this->_pos] : NULL;
|
||
|
}
|
||
|
|
||
|
/**
|
||
|
* setBlock
|
||
|
*
|
||
|
* @param mixed $to
|
||
|
* @param mixed $value
|
||
|
* @return $this
|
||
|
*/
|
||
|
private function setBlock($to = NULL, $value = NULL)
|
||
|
{
|
||
|
if (NULL !== $to) {
|
||
|
$this->_blocks[$this->_pos][2] = $to;
|
||
|
}
|
||
|
|
||
|
if (NULL !== $value) {
|
||
|
$this->_blocks[$this->_pos][3] = $value;
|
||
|
}
|
||
|
|
||
|
return $this;
|
||
|
}
|
||
|
|
||
|
/**
|
||
|
* backBlock
|
||
|
*
|
||
|
* @param mixed $step
|
||
|
* @param mixed $type
|
||
|
* @param mixed $value
|
||
|
* @return $this
|
||
|
*/
|
||
|
private function backBlock($step, $type, $value = NULL)
|
||
|
{
|
||
|
if ($this->_pos < 0) {
|
||
|
return $this->startBlock($type, 0, $value);
|
||
|
}
|
||
|
|
||
|
$last = $this->_blocks[$this->_pos][2];
|
||
|
$this->_blocks[$this->_pos][2] = $last - $step;
|
||
|
|
||
|
if ($this->_blocks[$this->_pos][1] <= $this->_blocks[$this->_pos][2]) {
|
||
|
$this->_pos ++;
|
||
|
}
|
||
|
|
||
|
$this->_current = $type;
|
||
|
$this->_blocks[$this->_pos] = array(
|
||
|
$type, $last - $step + 1, $last, $value
|
||
|
);
|
||
|
|
||
|
return $this;
|
||
|
}
|
||
|
|
||
|
/**
|
||
|
* @return $this
|
||
|
*/
|
||
|
private function combineBlock()
|
||
|
{
|
||
|
if ($this->_pos < 1) {
|
||
|
return $this;
|
||
|
}
|
||
|
|
||
|
$prev = $this->_blocks[$this->_pos - 1];
|
||
|
$current = $this->_blocks[$this->_pos];
|
||
|
|
||
|
$prev[2] = $current[2];
|
||
|
$this->_blocks[$this->_pos - 1] = $prev;
|
||
|
$this->_current = $prev[0];
|
||
|
unset($this->_blocks[$this->_pos]);
|
||
|
$this->_pos --;
|
||
|
|
||
|
return $this;
|
||
|
}
|
||
|
}
|
||
|
|