/**
* @param Text $text
*/
public function escapeAmpsAndBrackets(Text $text)
{
if ($text->contains('&')) {
$text->replace('/&(?!#?[xX]?(?:[0-9a-fA-F]+|\\w+);)/', '&');
}
if ($text->contains('<')) {
$text->replace('{<(?![a-z/?\\$!])}i', '<');
}
}
/**
* @param Text $text
*/
public function processItalic(Text $text)
{
if (!$text->contains('*') && !$text->contains('_')) {
return;
}
/** @noinspection PhpUnusedParameterInspection */
$text->replace('{ ([^\\*_\\s]?) (\\*|_) (?=\\S) (.+?) (?<=\\S) \\2 ([^\\*_\\s]?) }sx', function (Text $w, Text $prevChar, Text $a, Text $target, Text $nextChar) {
if (!$prevChar->isEmpty() && !$nextChar->isEmpty() && $target->contains(' ')) {
$this->getEmitter()->emit('escape.special_chars', [$w->replaceString(['*', '_'], ['\\*', '\\_'])]);
return $w;
}
return $prevChar . $this->getRenderer()->renderItalicText($target) . $nextChar;
});
}
/**
* @param Text $text
*/
public function processCodeSpan(Text $text)
{
if (!$text->contains('`')) {
return;
}
$chars = ['\\\\', '`', '\\*', '_', '{', '}', '\\[', '\\]', '\\(', '\\)', '>', '#', '\\+', '\\-', '\\.', '!'];
$chars = implode('|', $chars);
/** @noinspection PhpUnusedParameterInspection */
$text->replace('{
(`+) # $1 = Opening run of `
(.+?) # $2 = The code block
(?<!`)
\\1 # Matching closer
(?!`)
}x', function (Text $w, Text $b, Text $code) use($chars) {
$code->trim()->escapeHtml(ENT_NOQUOTES);
$code->replace(sprintf('/(?<!\\\\)(%s)/', $chars), '\\\\${1}');
return $this->getRenderer()->renderCodeSpan($code);
});
}
/**
* Make links out of things like `<http://example.com/>`
*
* @param Text $text
*/
public function processAutoLink(Text $text)
{
if (!$text->contains('<')) {
return;
}
$text->replace('{<((?:https?|ftp):[^\'">\\s]+)>}', function (Text $w, Text $url) {
$this->markdown->emit('escape.special_chars', [$url->replace('/(?<!\\\\)_/', '\\\\_')]);
return $this->getRenderer()->renderLink($url, ['href' => $url->getString()]);
});
/** @noinspection PhpUnusedParameterInspection */
$text->replace('{
<
(?:mailto:)?
(
[-.\\w]+
\\@
[-a-z0-9]+(\\.[-a-z0-9]+)*\\.[a-z]+
)
>
}ix', function (Text $w, Text $address) {
$address = "mailto:" . $address;
$encode = array(function ($char) {
return '&#' . ord($char) . ';';
}, function ($char) {
return '&#x' . dechex(ord($char)) . ';';
}, function ($char) {
return $char;
});
$chars = new Collection(str_split($address));
$chars->apply(function ($char) use($encode) {
if ($char == '@') {
return $encode[rand(0, 1)]($char);
} elseif ($char != ':') {
$rand = rand(0, 100);
$key = $rand > 90 ? 2 : ($rand < 45 ? 0 : 1);
return $encode[$key]($char);
}
return $char;
});
$address = $chars->join();
$text = $chars->slice(7)->join();
return $this->getRenderer()->renderLink($text, ['href' => $address]);
});
}
/**
* handle inline images: 
*
* @param Text $text
* @param array $options
*/
public function processInlineImage(Text $text, array $options = array())
{
if (!$text->contains('![')) {
return;
}
/** @xnoinspection PhpUnusedParameterInspection */
$text->replace('{
( # wrap whole match in $1
!\\[
(.*?) # alt text = $2
\\]
\\( # literal paren
[ \\t]*
<?(\\S+?)>? # src url = $3
[ \\t]*
( # $4
([\'"]) # quote char = $5
(.*?) # title = $6
\\5 # matching quote
[ \\t]*
)? # title is optional
\\)
)
}xs', function (Text $w, Text $whole, Text $alt, Text $url, Text $a = null, Text $q = null, Text $title = null) use($options) {
$attr = array('alt' => $alt->replace('/"/', '"'));
$this->markdown->emit('escape.special_chars', [$url->replace('/(?<!\\\\)_/', '\\\\_')]);
$url->escapeHtml();
if ($title) {
$attr['title'] = $title->replace('/"/', '"')->escapeHtml();
}
return $this->getRenderer()->renderImage($url, array('attr' => $attr));
});
}
