and atto ) */
protected $minheaderlevel = null;
public function __construct() {
parent::__construct();
// The order is important, headers should be parsed before links.
$this->tagrules = array(
// Headers are considered tags here.
'header' => array(
'expression' => "/<\s*h([1-6])\s*>(.+?)<\/h[1-6]>/is"
),
'link' => $this->tagrules['link'],
'url' => $this->tagrules['url']
);
}
/**
* Find minimum header level used on the page (, , ...)
*
* @param string $text
* @return int
*/
protected function find_min_header_level($text) {
preg_match_all($this->tagrules['header']['expression'], $text, $matches);
$level = !empty($matches[1]) ? min($matches[1]) : 1;
return $level >= 3 ? 3 : 1;
}
protected function before_parsing() {
parent::before_parsing();
$this->minheaderlevel = $this->find_min_header_level($this->string);
$this->rules($this->string);
}
/**
* Header tag rule
* @param array $match Header regex match
* @return string
*/
protected function header_tag_rule($match) {
return $this->generate_header($match[2], $match[1]);
}
/**
* Section editing: Special for HTML Parser (It parses )
*/
public function get_section($header, $text, $clean = false) {
if ($clean) {
$text = preg_replace('/\r\n/', "\n", $text);
$text = preg_replace('/\r/', "\n", $text);
$text .= "\n\n";
}
$minheaderlevel = $this->find_min_header_level($text);
$h1 = array("<\s*h{$minheaderlevel}\s*>", "<\/h{$minheaderlevel}>");
$regex = "/(.*?)({$h1[0]}\s*".preg_quote($header, '/')."\s*{$h1[1]}.*?)((?:{$h1[0]}.*)|$)/is";
preg_match($regex, $text, $match);
if (!empty($match)) {
return array($match[1], $match[2], $match[3]);
} else {
return false;
}
}
protected function get_repeated_sections(&$text, $repeated = array()) {
$this->repeated_sections = $repeated;
return preg_replace_callback($this->tagrules['header'], array($this, 'get_repeated_sections_callback'), $text);
}
protected function get_repeated_sections_callback($match) {
$text = trim($match[2]);
if (in_array($text, $this->repeated_sections)) {
$this->returnvalues['repeated_sections'][] = $text;
return parser_utils::h('p', $text);
} else {
$this->repeated_sections[] = $text;
}
return $match[0];
}
/**
* Header generation
*
* @param string $text
* @param int $level
* @return string
*/
protected function generate_header($text, $level) {
$text = trim($text);
$normlevel = $level - $this->minheaderlevel + 1;
if (!$this->pretty_print && $normlevel == 1) {
$text .= ' ' . parser_utils::h('a', '['.get_string('editsection', 'wiki').']',
array('href' => "edit.php?pageid={$this->wiki_page_id}§ion=" . urlencode($text),
'class' => 'wiki_edit_section'));
}
if ($normlevel <= $this->maxheaderdepth) {
$this->toc[] = array($normlevel, $text);
$num = count($this->toc);
$text = parser_utils::h('a', "", array('name' => "toc-$num")) . $text;
}
return parser_utils::h('h' . $level, $text) . "\n\n";
}
}