Current Directory: /home/astoriaah/www/administrator/components/com_widgetkit/src/Helper
Viewing File: /home/astoriaah/www/administrator/components/com_widgetkit/src/Helper/Shortcode.php
<?php
namespace YOOtheme\Widgetkit\Helper;
class Shortcode
{
/**
* Applies callback to shortcode tags.
*
* @param string $tag
* @param string $text
* @param callable $callback
* @return mixed|string
*/
public function parse($tag, $text, $callback)
{
if (false === strpos($text, '[')) {
return $text;
}
$self = $this;
return preg_replace_callback(
$this->getRegexp($tag),
function ($matches) use ($self, $callback) {
// allow [[foo]] syntax for escaping a tag
if ($matches[1] == '[' && $matches[7] == ']') {
return substr($matches[0], 1, -1);
}
$tag = $matches[2];
$attrs = $self->attrs($matches[3]);
$content = $matches[5];
return $matches[1] .
call_user_func($callback, $attrs, $content, $tag, $matches[0]) .
$matches[7];
},
$text
);
}
/**
* Retrieve attributes from the shortcode tag.
*
* @param string $text
* @return array
*/
public function attrs($text)
{
$attrs = [];
$pattern =
'/(\w+)\s*=\s*"([^"]*)"(?:\s|$)|(\w+)\s*=\s*\'([^\']*)\'(?:\s|$)|(\w+)\s*=\s*([^\s\'"]+)(?:\s|$)|"([^"]*)"(?:\s|$)|(\S+)(?:\s|$)/';
$text = preg_replace('/[\x{00a0}\x{200b}]+/u', ' ', $text);
if (preg_match_all($pattern, $text, $matches, PREG_SET_ORDER)) {
foreach ($matches as $match) {
if ($match[1]) {
$attrs[strtolower($match[1])] = $match[2];
} elseif ($match[3]) {
$attrs[strtolower($match[3])] = $match[4];
} elseif ($match[5] && $match[6] === 'true') {
$attrs[strtolower($match[5])] = true;
} elseif ($match[5] && $match[6] === 'false') {
$attrs[strtolower($match[5])] = false;
} elseif ($match[5]) {
$attrs[strtolower($match[5])] = $match[6];
} elseif ($match[7]) {
$attrs[$match[7]] = true;
} elseif ($match[8]) {
$attrs[$match[8]] = true;
}
}
} else {
$attrs = ltrim($text);
}
return $attrs;
}
/**
* Gets the shortcode regular expression pattern.
*
* @param string $tag
* @return string
*/
protected function getRegexp($tag)
{
return '/
\[ # Opening bracket
(\[?) # 1: Optional second opening bracket for escaping shortcodes: [[tag]]
(' .
$tag .
') # 2: Shortcode name
(?![\w-]) # Not followed by word character or hyphen
( # 3: Unroll the loop: Inside the opening shortcode tag
[^\]\/]* # Not a closing bracket or forward slash
(?:
\/(?!\]) # A forward slash not followed by a closing bracket
[^\]\/]* # Not a closing bracket or forward slash
)*?
)
(?:
(\/) # 4: Self closing tag ...
\] # ... and closing bracket
|
\] # Closing bracket
(?:
( # 5: Unroll the loop: Optionally, anything between the opening and closing shortcode tags
[^\[]* # Not an opening bracket
(?:
\[(?!\/\2\]) # An opening bracket not followed by the closing shortcode tag
[^\[]* # Not an opening bracket
)*
)
(\[\/\2\]) # Closing shortcode tag
)?
)
(\]?) # 6: Optional second closing brocket for escaping shortcodes: [[tag]]
/sx';
}
}