* @license BSD License
*/
class Parser
{
/**
* _whiteList
*
* @var string
*/
private $_commonWhiteList = 'kbd|b|i|strong|em|sup|sub|br|code|del|a|hr|small';
/**
* html tags
*
* @var string
*/
private $_blockHtmlTags = 'p|div|h[1-6]|blockquote|pre|table|dl|ol|ul|address|form|fieldset|iframe|hr|legend|article|section|nav|aside|hgroup|header|footer|figcaption|svg|script|noscript';
/**
* _specialWhiteList
*
* @var mixed
* @access private
*/
private $_specialWhiteList = array(
'table' => 'table|tbody|thead|tfoot|tr|td|th',
);
/**
* _footnotes
*
* @var array
*/
private $_footnotes;
/**
* @var bool
*/
private $_html = false;
/**
* @var bool
*/
private $_line = false;
/**
* @var array
*/
private $blockParsers = array(
array('code', 10),
array('shtml', 20),
array('pre', 30),
array('ahtml', 40),
array('shr', 50),
array('list', 60),
array('math', 70),
array('html', 80),
array('footnote', 90),
array('definition', 100),
array('quote', 110),
array('table', 120),
array('sh', 130),
array('mh', 140),
array('dhr', 150),
array('default', 9999),
);
/**
* _blocks
*
* @var array
*/
private $_blocks;
/**
* _current
*
* @var string
*/
private $_current;
/**
* _pos
*
* @var int
*/
private $_pos;
/**
* _definitions
*
* @var array
*/
private $_definitions;
/**
* @var array
*/
private $_hooks = array();
/**
* @var array
*/
private $_holders;
/**
* @var string
*/
private $_uniqid;
/**
* @var int
*/
private $_id;
/**
* @var array
*/
private $_parsers = array();
/**
* makeHtml
*
* @param mixed $text
* @return string
*/
public function makeHtml($text)
{
$this->_footnotes = array();
$this->_definitions = array();
$this->_holders = array();
$this->_uniqid = md5(uniqid());
$this->_id = 0;
usort($this->blockParsers, function ($a, $b) {
return $a[1] < $b[1] ? -1 : 1;
});
foreach ($this->blockParsers as $parser) {
list($name) = $parser;
if (isset($parser[2])) {
$this->_parsers[$name] = $parser[2];
} else {
$this->_parsers[$name] = array($this, 'parseBlock' . ucfirst($name));
}
}
$text = $this->initText($text);
$html = $this->parse($text);
$html = $this->makeFootnotes($html);
$html = $this->optimizeLines($html);
return $this->call('makeHtml', $html);
}
/**
* @param $html
*/
public function enableHtml($html = true)
{
$this->_html = $html;
}
/**
* @param bool $line
*/
public function enableLine($line = true)
{
$this->_line = $line;
}
/**
* @param $type
* @param $callback
*/
public function hook($type, $callback)
{
$this->_hooks[$type][] = $callback;
}
/**
* @param $str
* @return string
*/
public function makeHolder($str)
{
$key = "\r" . $this->_uniqid . $this->_id . "\r";
$this->_id++;
$this->_holders[$key] = $str;
return $key;
}
/**
* @param $text
* @return mixed
*/
private function initText($text)
{
$text = str_replace(array("\t", "\r"), array(' ', ''), $text);
return $text;
}
/**
* @param $html
* @return string
*/
private function makeFootnotes($html)
{
if (count($this->_footnotes) > 0) {
$html .= '';
}
return $html;
}
/**
* parse
*
* @param string $text
* @param bool $inline
* @param int $offset
* @return string
*/
private function parse($text, $inline = false, $offset = 0)
{
$blocks = $this->parseBlock($text, $lines);
$html = '';
// inline mode for single normal block
if ($inline && count($blocks) == 1 && $blocks[0][0] == 'normal') {
$blocks[0][3] = true;
}
foreach ($blocks as $block) {
list($type, $start, $end, $value) = $block;
$extract = array_slice($lines, $start, $end - $start + 1);
$method = 'parse' . ucfirst($type);
$extract = $this->call('before' . ucfirst($method), $extract, $value);
$result = $this->{$method}($extract, $value, $start + $offset, $end + $offset);
$result = $this->call('after' . ucfirst($method), $result, $value);
$html .= $result;
}
return $html;
}
/**
* @param $text
* @param $clearHolders
* @return string
*/
private function releaseHolder($text, $clearHolders = true)
{
$deep = 0;
while (strpos($text, "\r") !== false && $deep < 10) {
$text = str_replace(array_keys($this->_holders), array_values($this->_holders), $text);
$deep++;
}
if ($clearHolders) {
$this->_holders = array();
}
return $text;
}
/**
* @param $start
* @param int $end
* @return string
*/
private function markLine($start, $end = -1)
{
if ($this->_line) {
$end = $end < 0 ? $start : $end;
return '';
}
return '';
}
/**
* @param array $lines
* @param $start
* @return string[]
*/
private function markLines(array $lines, $start)
{
$i = -1;
return $this->_line ? array_map(function ($line) use ($start, &$i) {
$i++;
return $this->markLine($start + $i) . $line;
}, $lines) : $lines;
}
/**
* @param $html
* @return string
*/
private function optimizeLines($html)
{
$last = 0;
return $this->_line ?
preg_replace_callback("/class=\"line\" data\-start=\"([0-9]+)\" data\-end=\"([0-9]+)\" (data\-id=\"{$this->_uniqid}\")/",
function ($matches) use (&$last) {
if ($matches[1] != $last) {
$replace = 'class="line" data-start="' . $last . '" data-start-original="' . $matches[1] . '" data-end="' . $matches[2] . '" ' . $matches[3];
} else {
$replace = $matches[0];
}
$last = $matches[2] + 1;
return $replace;
}, $html) : $html;
}
/**
* @param $type
* @param $value
* @return mixed
*/
private function call($type, $value)
{
if (empty($this->_hooks[$type])) {
return $value;
}
$args = func_get_args();
$args = array_slice($args, 1);
foreach ($this->_hooks[$type] as $callback) {
$value = call_user_func_array($callback, $args);
$args[0] = $value;
}
return $value;
}
/**
* parseInline
*
* @param string $text
* @param string $whiteList
* @param bool $clearHolders
* @param bool $enableAutoLink
* @return string
*/
private function parseInline($text, $whiteList = '', $clearHolders = true, $enableAutoLink = true)
{
$text = $this->call('beforeParseInline', $text);
// code
$text = preg_replace_callback(
"/(^|[^\\\])(`+)(.+?)\\2/",
function ($matches) {
return $matches[1] . $this->makeHolder(
'' . htmlspecialchars($matches[3]) . ''
);
},
$text
);
// mathjax
$text = preg_replace_callback(
"/(^|[^\\\])(\\$+)(.+?)\\2/",
function ($matches) {
return $matches[1] . $this->makeHolder(
$matches[2] . htmlspecialchars($matches[3]) . $matches[2]
);
},
$text
);
// escape
$text = preg_replace_callback(
"/\\\(.)/u",
function ($matches) {
$prefix = preg_match("/^[-\[\]\/\{\}\(\)\*\+\?\.\\\^\$\|]$/", $matches[1]) ? '' : '\\';
$escaped = htmlspecialchars($matches[1]);
$escaped = str_replace('$', '$', $escaped);
return $this->makeHolder($prefix . $escaped);
},
$text
);
// link
$text = preg_replace_callback(
"/<(https?:\/\/.+|(?:mailto:)?[_a-z0-9-\.\+]+@[_\w-]+(?:\.[a-z]{2,})+)>/i",
function ($matches) {
$url = $this->cleanUrl($matches[1]);
$link = $this->call('parseLink', $url);
return $this->makeHolder(
"{$link}"
);
},
$text
);
// encode unsafe tags
$text = preg_replace_callback(
"/<(\/?)([a-z0-9-]+)(\s+[^>]*)?>/i",
function ($matches) use ($whiteList) {
if ($this->_html || false !== stripos(
'|' . $this->_commonWhiteList . '|' . $whiteList . '|', '|' . $matches[2] . '|'
)) {
return $this->makeHolder($matches[0]);
} else {
return $this->makeHolder(htmlspecialchars($matches[0]));
}
},
$text
);
if ($this->_html) {
$text = preg_replace_callback("//", function ($matches) {
return $this->makeHolder($matches[0]);
}, $text);
}
$text = str_replace(array('<', '>'), array('<', '>'), $text);
// footnote
$text = preg_replace_callback(
"/\[\^((?:[^\]]|\\\\\]|\\\\\[)+?)\]/",
function ($matches) {
$id = array_search($matches[1], $this->_footnotes);
if (false === $id) {
$id = count($this->_footnotes) + 1;
$this->_footnotes[$id] = $this->parseInline($matches[1], '', false);
}
return $this->makeHolder(
""
);
},
$text
);
// image
$text = preg_replace_callback(
"/!\[((?:[^\]]|\\\\\]|\\\\\[)*?)\]\(((?:[^\)]|\\\\\)|\\\\\()+?)\)/",
function ($matches) {
$escaped = htmlspecialchars($this->escapeBracket($matches[1]));
$url = $this->escapeBracket($matches[2]);
list($url, $title) = $this->cleanUrl($url, true);
$title = empty($title) ? $escaped : " title=\"{$title}\"";
return $this->makeHolder(
"![\"{$title}\"](\"{$url}\" "\\"{$title}\\"")
"
);
},
$text
);
$text = preg_replace_callback(
"/!\[((?:[^\]]|\\\\\]|\\\\\[)*?)\]\[((?:[^\]]|\\\\\]|\\\\\[)+?)\]/",
function ($matches) {
$escaped = htmlspecialchars($this->escapeBracket($matches[1]));
$result = isset($this->_definitions[$matches[2]]) ?
"![](\"{$this-)
_definitions[$matches[2]]}\" alt=\"{$escaped}\" title=\"{$escaped}\">"
: $escaped;
return $this->makeHolder($result);
},
$text
);
// link
$text = preg_replace_callback(
"/\[((?:[^\]]|\\\\\]|\\\\\[)+?)\]\(((?:[^\)]|\\\\\)|\\\\\()+?)\)/",
function ($matches) {
$escaped = $this->parseInline(
$this->escapeBracket($matches[1]), '', false, false
);
$url = $this->escapeBracket($matches[2]);
list($url, $title) = $this->cleanUrl($url, true);
$title = empty($title) ? '' : " title=\"{$title}\"";
return $this->makeHolder("{$escaped}");
},
$text
);
$text = preg_replace_callback(
"/\[((?:[^\]]|\\\\\]|\\\\\[)+?)\]\[((?:[^\]]|\\\\\]|\\\\\[)+?)\]/",
function ($matches) {
$escaped = $this->parseInline(
$this->escapeBracket($matches[1]), '', false
);
$result = isset($this->_definitions[$matches[2]]) ?
"_definitions[$matches[2]]}\">{$escaped}"
: $escaped;
return $this->makeHolder($result);
},
$text
);
// strong and em and some fuck
$text = $this->parseInlineCallback($text);
$text = preg_replace(
"/<([_a-z0-9-\.\+]+@[^@]+\.[a-z]{2,})>/i",
"\\1",
$text
);
// autolink url
if ($enableAutoLink) {
$text = preg_replace_callback(
"/(^|[^\"])(https?:\/\/(www\.)?[-a-zA-Z0-9@:%._\+~#=]{1,256}\b([-a-zA-Z0-9@:%_\+.~#?&\/=]*)|(?:mailto:)?[_a-z0-9-\.\+]+@[_\w-]+(?:\.[a-z]{2,})+)($|[^\"])/",
function ($matches) {
$url = $this->cleanUrl($matches[2]);
$link = $this->call('parseLink', $matches[2]);
return "{$matches[1]}{$link}{$matches[5]}";
},
$text
);
}
$text = $this->call('afterParseInlineBeforeRelease', $text);
$text = $this->releaseHolder($text, $clearHolders);
$text = $this->call('afterParseInline', $text);
return $text;
}
/**
* @param $text
* @return mixed
*/
private function parseInlineCallback($text)
{
$text = preg_replace_callback(
"/(\*{3})(.+?)\\1/",
function ($matches) {
return '' .
$this->parseInlineCallback($matches[2]) .
'';
},
$text
);
$text = preg_replace_callback(
"/(\*{2})(.+?)\\1/",
function ($matches) {
return '' .
$this->parseInlineCallback($matches[2]) .
'';
},
$text
);
$text = preg_replace_callback(
"/(\*)(.+?)\\1/",
function ($matches) {
return '' .
$this->parseInlineCallback($matches[2]) .
'';
},
$text
);
$text = preg_replace_callback(
"/(\s+|^)(_{3})(.+?)\\2(\s+|$)/",
function ($matches) {
return $matches[1] . '' .
$this->parseInlineCallback($matches[3]) .
'' . $matches[4];
},
$text
);
$text = preg_replace_callback(
"/(\s+|^)(_{2})(.+?)\\2(\s+|$)/",
function ($matches) {
return $matches[1] . '' .
$this->parseInlineCallback($matches[3]) .
'' . $matches[4];
},
$text
);
$text = preg_replace_callback(
"/(\s+|^)(_)(.+?)\\2(\s+|$)/",
function ($matches) {
return $matches[1] . '' .
$this->parseInlineCallback($matches[3]) .
'' . $matches[4];
},
$text
);
$text = preg_replace_callback(
"/(~{2})(.+?)\\1/",
function ($matches) {
return '' .
$this->parseInlineCallback($matches[2]) .
'';
},
$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;
$state = array(
'special' => implode("|", array_keys($this->_specialWhiteList)),
'empty' => 0,
'html' => false,
);
// analyze by line
foreach ($lines as $key => $line) {
$block = $this->getBlock();
$args = array($block, $key, $line, &$state, $lines);
if ($this->_current != 'normal') {
$pass = call_user_func_array($this->_parsers[$this->_current], $args);
if (!$pass) {
continue;
}
}
foreach ($this->_parsers as $name => $parser) {
if ($name != $this->_current) {
$pass = call_user_func_array($parser, $args);
if (!$pass) {
break;
}
}
}
}
return $this->optimizeBlocks($this->_blocks, $lines);
}
/**
* @param $block
* @param $key
* @param $line
* @param $state
* @return bool
*/
private function parseBlockList($block, $key, $line, &$state)
{
if ($this->isBlock('list') && !preg_match("/^\s*\[((?:[^\]]|\\]|\\[)+?)\]:\s*(.+)$/", $line)) {
if (preg_match("/^(\s*)(~{3,}|`{3,})([^`~]*)$/i", $line)) {
// ignore code
return true;
} elseif ($state['empty'] <= 1
&& preg_match("/^(\s*)\S+/", $line, $matches)
&& strlen($matches[1]) >= ($block[3][0] + $state['empty'])) {
$state['empty'] = 0;
$this->setBlock($key);
return false;
} elseif (preg_match("/^(\s*)$/", $line) && $state['empty'] == 0) {
$state['empty']++;
$this->setBlock($key);
return false;
}
}
if (preg_match("/^(\s*)((?:[0-9]+\.)|\-|\+|\*)\s+/i", $line, $matches)) {
$space = strlen($matches[1]);
$tab = strlen($matches[0]) - $space;
$state['empty'] = 0;
$type = false !== strpos('+-*', $matches[2]) ? 'ul' : 'ol';
// opened
if ($this->isBlock('list')) {
if ($space < $block[3][0] || ($space == $block[3][0] && $type != $block[3][1])) {
$this->startBlock('list', $key, [$space, $type, $tab]);
} else {
$this->setBlock($key);
}
} else {
$this->startBlock('list', $key, [$space, $type, $tab]);
}
return false;
}
return true;
}
/**
* @param $block
* @param $key
* @param $line
* @param $state
* @return bool
*/
private function parseBlockCode($block, $key, $line, &$state)
{
if (preg_match("/^(\s*)(~{3,}|`{3,})([^`~]*)$/i", $line, $matches)) {
if ($this->isBlock('code')) {
if ($state['code'] != $matches[2]) {
$this->setBlock($key);
return false;
}
$isAfterList = $block[3][2];
if ($isAfterList) {
$state['empty'] = 0;
$this->combineBlock()
->setBlock($key);
} else {
$this->setBlock($key)
->endBlock();
}
} else {
$isAfterList = false;
if ($this->isBlock('list')) {
$space = $block[3][0];
$isAfterList = strlen($matches[1]) >= $space + $state['empty'];
}
$state['code'] = $matches[2];
$this->startBlock('code', $key, array(
$matches[1], $matches[3], $isAfterList,
));
}
return false;
} elseif ($this->isBlock('code')) {
$this->setBlock($key);
return false;
}
return true;
}
/**
* @param $block
* @param $key
* @param $line
* @param $state
* @return bool
*/
private function parseBlockShtml($block, $key, $line, &$state)
{
if ($this->_html) {
if (preg_match("/^(\s*)!!!(\s*)$/", $line, $matches)) {
if ($this->isBlock('shtml')) {
$this->setBlock($key)->endBlock();
} else {
$this->startBlock('shtml', $key);
}
return false;
} elseif ($this->isBlock('shtml')) {
$this->setBlock($key);
return false;
}
}
return true;
}
/**
* @param $block
* @param $key
* @param $line
* @param $state
* @return bool
*/
private function parseBlockAhtml($block, $key, $line, &$state)
{
if ($this->_html) {
if (preg_match("/^\s*<({$this->_blockHtmlTags})(\s+[^>]*)?>/i", $line, $matches)) {
if ($this->isBlock('ahtml')) {
$this->setBlock($key);
return false;
} elseif (empty($matches[2]) || $matches[2] != '/') {
$this->startBlock('ahtml', $key);
preg_match_all("/<({$this->_blockHtmlTags})(\s+[^>]*)?>/i", $line, $allMatches);
$lastMatch = $allMatches[1][count($allMatches[0]) - 1];
if (strpos($line, "") !== false) {
$this->endBlock();
} else {
$state['html'] = $lastMatch;
}
return false;
}
} elseif (!!$state['html'] && strpos($line, "") !== false) {
$this->setBlock($key)->endBlock();
$state['html'] = false;
return false;
} elseif ($this->isBlock('ahtml')) {
$this->setBlock($key);
return false;
} elseif (preg_match("/^\s*\s*$/", $line, $matches)) {
$this->startBlock('ahtml', $key)->endBlock();
return false;
}
}
return true;
}
/**
* @param $block
* @param $key
* @param $line
* @return bool
*/
private function parseBlockMath($block, $key, $line)
{
if (preg_match("/^(\s*)\\$\\$(\s*)$/", $line, $matches)) {
if ($this->isBlock('math')) {
$this->setBlock($key)->endBlock();
} else {
$this->startBlock('math', $key);
}
return false;
} elseif ($this->isBlock('math')) {
$this->setBlock($key);
return false;
}
return true;
}
/**
* @param $block
* @param $key
* @param $line
* @param $state
* @return bool
*/
private function parseBlockPre($block, $key, $line, &$state)
{
if (preg_match("/^ {4}/", $line)) {
if ($this->isBlock('pre')) {
$this->setBlock($key);
} else {
$this->startBlock('pre', $key);
}
return false;
} elseif ($this->isBlock('pre') && preg_match("/^\s*$/", $line)) {
$this->setBlock($key);
return false;
}
return true;
}
/**
* @param $block
* @param $key
* @param $line
* @param $state
* @return bool
*/
private function parseBlockHtml($block, $key, $line, &$state)
{
if (preg_match("/^\s*<({$state['special']})(\s+[^>]*)?>/i", $line, $matches)) {
$tag = strtolower($matches[1]);
if (!$this->isBlock('html', $tag) && !$this->isBlock('pre')) {
$this->startBlock('html', $key, $tag);
}
return false;
} elseif (preg_match("/<\/({$state['special']})>\s*$/i", $line, $matches)) {
$tag = strtolower($matches[1]);
if ($this->isBlock('html', $tag)) {
$this->setBlock($key)
->endBlock();
}
return false;
} elseif ($this->isBlock('html')) {
$this->setBlock($key);
return false;
}
return true;
}
/**
* @param $block
* @param $key
* @param $line
* @return bool
*/
private function parseBlockFootnote($block, $key, $line)
{
if (preg_match("/^\[\^((?:[^\]]|\\]|\\[)+?)\]:/", $line, $matches)) {
$space = strlen($matches[0]) - 1;
$this->startBlock('footnote', $key, array(
$space, $matches[1],
));
return false;
}
return true;
}
/**
* @param $block
* @param $key
* @param $line
* @return bool
*/
private function parseBlockDefinition($block, $key, $line)
{
if (preg_match("/^\s*\[((?:[^\]]|\\]|\\[)+?)\]:\s*(.+)$/", $line, $matches)) {
$this->_definitions[$matches[1]] = $this->cleanUrl($matches[2]);
$this->startBlock('definition', $key)
->endBlock();
return false;
}
return true;
}
/**
* @param $block
* @param $key
* @param $line
* @return bool
*/
private function parseBlockQuote($block, $key, $line)
{
if (preg_match("/^(\s*)>/", $line, $matches)) {
if ($this->isBlock('list') && strlen($matches[1]) > 0) {
$this->setBlock($key);
} elseif ($this->isBlock('quote')) {
$this->setBlock($key);
} else {
$this->startBlock('quote', $key);
}
return false;
}
return true;
}
/**
* @param $block
* @param $key
* @param $line
* @param $state
* @param $lines
* @return bool
*/
private function parseBlockTable($block, $key, $line, &$state, $lines)
{
if (preg_match("/^((?:(?:(?:\||\+)(?:[ :]*\-+[ :]*)(?:\||\+))|(?:(?:[ :]*\-+[ :]*)(?:\||\+)(?:[ :]*\-+[ :]*))|(?:(?:[ :]*\-+[ :]*)(?:\||\+))|(?:(?:\||\+)(?:[ :]*\-+[ :]*)))+)$/", $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])) {
$align = 'center';
} elseif (!empty($matches[1])) {
$align = 'left';
} elseif (!empty($matches[2])) {
$align = 'right';
}
}
$aligns[] = $align;
}
$this->setBlock($key, array(array($head), $aligns, $head + 1));
}
return false;
}
return true;
}
/**
* @param $block
* @param $key
* @param $line
* @return bool
*/
private function parseBlockSh($block, $key, $line)
{
if (preg_match("/^(#+)(.*)$/", $line, $matches)) {
$num = min(strlen($matches[1]), 6);
$this->startBlock('sh', $key, $num)
->endBlock();
return false;
}
return true;
}
/**
* @param $block
* @param $key
* @param $line
* @param $state
* @param $lines
* @return bool
*/
private function parseBlockMh($block, $key, $line, &$state, $lines)
{
if (preg_match("/^\s*((=|-){2,})\s*$/", $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);
}
return false;
}
return true;
}
/**
* @param $block
* @param $key
* @param $line
* @return bool
*/
private function parseBlockShr($block, $key, $line)
{
if (preg_match("/^(\* *){3,}\s*$/", $line)) {
$this->startBlock('hr', $key)
->endBlock();
return false;
}
return true;
}
/**
* @param $block
* @param $key
* @param $line
* @return bool
*/
private function parseBlockDhr($block, $key, $line)
{
if (preg_match("/^(- *){3,}\s*$/", $line)) {
$this->startBlock('hr', $key)
->endBlock();
return false;
}
return true;
}
/**
* @param $block
* @param $key
* @param $line
* @param $state
* @return bool
*/
private function parseBlockDefault($block, $key, $line, &$state)
{
if ($this->isBlock('footnote')) {
preg_match("/^(\s*)/", $line, $matches);
if (strlen($matches[1]) >= $block[3][0]) {
$this->setBlock($key);
} else {
$this->startBlock('normal', $key);
}
} elseif ($this->isBlock('table')) {
if (false !== strpos($line, '|')) {
$block[3][2]++;
$this->setBlock($key, $block[3]);
} else {
$this->startBlock('normal', $key);
}
} elseif ($this->isBlock('quote')) {
if (!preg_match("/^(\s*)$/", $line)) {
// empty line
$this->setBlock($key);
} else {
$this->startBlock('normal', $key);
}
} else {
if (empty($block) || $block[0] != 'normal') {
$this->startBlock('normal', $key);
} else {
$this->setBlock($key);
}
}
return true;
}
/**
* @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) {
$isEmpty = array_reduce(
array_slice($lines, $block[1], $block[2] - $block[1] + 1),
function ($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], $types)
&& ($prevBlock[0] != 'list'
|| ($prevBlock[3][0] == $nextBlock[3][0] && $prevBlock[3][1] == $nextBlock[3][1]))) {
// combine 3 blocks
$blocks[$key - 1] = array(
$prevBlock[0], $prevBlock[1], $nextBlock[2], $prevBlock[3] ?? null,
);
array_splice($blocks, $key, 2);
// do not move
$moved = true;
}
}
}
if (!$moved) {
$key++;
}
}
return $this->call('afterOptimizeBlocks', $blocks, $lines);
}
/**
* parseCode
*
* @param array $lines
* @param array $parts
* @param int $start
* @return string
*/
private function parseCode(array $lines, array $parts, $start)
{
list($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);
}
}
$isEmpty = true;
$lines = array_map(function ($line) use ($count, &$isEmpty) {
$line = preg_replace("/^[ ]{{$count}}/", '', $line);
if ($isEmpty && !preg_match("/^\s*$/", $line)) {
$isEmpty = false;
}
return htmlspecialchars($line);
}, array_slice($lines, 1, -1));
$str = implode("\n", $this->markLines($lines, $start + 1));
return $isEmpty ? '' :
''
. $str . '
';
}
/**
* parsePre
*
* @param array $lines
* @param mixed $value
* @param int $start
* @return string
*/
private function parsePre(array $lines, $value, $start)
{
foreach ($lines as &$line) {
$line = htmlspecialchars(substr($line, 4));
}
$str = implode("\n", $this->markLines($lines, $start));
return preg_match("/^\s*$/", $str) ? '' : '' . $str . '
';
}
/**
* parseAhtml
*
* @param array $lines
* @param mixed $value
* @param int $start
* @return string
*/
private function parseAhtml(array $lines, $value, $start)
{
return trim(implode("\n", $this->markLines($lines, $start)));
}
/**
* parseShtml
*
* @param array $lines
* @param mixed $value
* @param int $start
* @return string
*/
private function parseShtml(array $lines, $value, $start)
{
return trim(implode("\n", $this->markLines(array_slice($lines, 1, -1), $start + 1)));
}
/**
* parseMath
*
* @param array $lines
* @param mixed $value
* @param int $start
* @param int $end
* @return string
*/
private function parseMath(array $lines, $value, $start, $end)
{
return '' . $this->markLine($start, $end) . htmlspecialchars(implode("\n", $lines)) . '
';
}
/**
* parseSh
*
* @param array $lines
* @param int $num
* @param int $start
* @param int $end
* @return string
*/
private function parseSh(array $lines, $num, $start, $end)
{
$line = $this->markLine($start, $end) . $this->parseInline(trim($lines[0], '# '));
return preg_match("/^\s*$/", $line) ? '' : "{$line}";
}
/**
* parseMh
*
* @param array $lines
* @param int $num
* @param int $start
* @param int $end
* @return string
*/
private function parseMh(array $lines, $num, $start, $end)
{
return $this->parseSh($lines, $num, $start, $end);
}
/**
* parseQuote
*
* @param array $lines
* @param mixed $value
* @param int $start
* @return string
*/
private function parseQuote(array $lines, $value, $start)
{
foreach ($lines as &$line) {
$line = preg_replace("/^\s*> ?/", '', $line);
}
$str = implode("\n", $lines);
return preg_match("/^\s*$/", $str) ? '' : '' . $this->parse($str, true, $start) . '
';
}
/**
* parseList
*
* @param array $lines
* @param mixed $value
* @param int $start
* @return string
*/
private function parseList(array $lines, $value, $start)
{
$html = '';
list($space, $type, $tab) = $value;
$rows = array();
$suffix = '';
$last = 0;
foreach ($lines as $key => $line) {
if (preg_match("/^(\s{" . $space . "})((?:[0-9]+\.?)|\-|\+|\*)(\s+)(.*)$/i", $line, $matches)) {
if ($type == 'ol' && $key == 0) {
$start = intval($matches[2]);
if ($start != 1) {
$suffix = ' start="' . $start . '"';
}
}
$rows[] = [$matches[4]];
$last = count($rows) - 1;
} else {
$rows[$last][] = preg_replace("/^\s{" . ($tab + $space) . "}/", '', $line);
}
}
foreach ($rows as $row) {
$html .= "" . $this->parse(implode("\n", $row), true, $start) . "";
$start += count($row);
}
return "<{$type}{$suffix}>{$html}";
}
/**
* @param array $lines
* @param array $value
* @param int $start
* @return string
*/
private function parseTable(array $lines, array $value, $start)
{
list($ignores, $aligns) = $value;
$head = count($ignores) > 0 && array_sum($ignores) > 0;
$html = '';
$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, $row,
);
} elseif (isset($columns[$last])) {
$columns[$last][0]++;
} else {
$columns[0] = array(1, $row);
}
}
if ($head) {
$html .= '';
} elseif ($body) {
$html .= '';
}
$html .= '_line ? ' class="line" data-start="'
. ($start + $key) . '" data-end="' . ($start + $key)
. '" data-id="' . $this->_uniqid . '"' : '') . '>';
foreach ($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) . "";
}
$html .= '';
if ($head) {
$html .= '';
} elseif ($body) {
$body = false;
}
}
if ($body !== null) {
$html .= '';
}
$html .= '
';
return $html;
}
/**
* parseHr
*
* @param array $lines
* @param array $value
* @param int $start
* @return string
*/
private function parseHr($lines, $value, $start)
{
return $this->_line ? '
' : '
';
}
/**
* parseNormal
*
* @param array $lines
* @param bool $inline
* @param int $start
* @return string
*/
private function parseNormal(array $lines, $inline, $start)
{
foreach ($lines as $key => &$line) {
$line = $this->parseInline($line);
if (!preg_match("/^\s*$/", $line)) {
$line = $this->markLine($start + $key) . $line;
}
}
$str = trim(implode("\n", $lines));
$str = preg_replace_callback("/(\n\s*){2,}/", function () use (&$inline) {
$inline = false;
return "";
}, $str);
$str = preg_replace("/\n/", "
", $str);
return preg_match("/^\s*$/", $str) ? '' : ($inline ? $str : "
{$str}
");
}
/**
* 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
* @param int $start
* @return string
*/
private function parseHtml(array $lines, $type, $start)
{
foreach ($lines as &$line) {
$line = $this->parseInline($line,
isset($this->_specialWhiteList[$type]) ? $this->_specialWhiteList[$type] : '');
}
return implode("\n", $this->markLines($lines, $start));
}
/**
* @param $url
* @param bool $parseTitle
*
* @return mixed
*/
private function cleanUrl($url, $parseTitle = false)
{
$title = null;
$url = trim($url);
if ($parseTitle) {
$pos = strpos($url, ' ');
if ($pos !== false) {
$title = htmlspecialchars(trim(substr($url, $pos + 1), ' "\''));
$url = substr($url, 0, $pos);
}
}
$url = preg_replace("/[\"'<>\s]/", '', $url);
if (preg_match("/^(mailto:)?[_a-z0-9-\.\+]+@[_\w-]+(?:\.[a-z]{2,})+$/i", $url, $matches)) {
if (empty($matches[1])) {
$url = 'mailto:' . $url;
}
}
if (preg_match("/^\w+:/i", $url) && !preg_match("/^(https?|mailto):/i", $url)) {
return '#';
}
return $parseTitle ? [$url, $title] : $url;
}
/**
* @param $str
* @return mixed
*/
private function escapeBracket($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;
}
}