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59641dd5a6
There was a problem with wiki pages in the HTML markup syntax. If they contain a link and the link text has a URL in it, that URL was converted into another link. But it was not correctly nested and it caused additional troubles with filters (particularly the multimedia filter if the URL was a video such as on youtube). The solution here is similar to what we do in filters. We protect the whole explicit link so that its content is not further parsed. That prevents the inner URL to be converted into another link and the explicit link has the full control.
113 lines
3.5 KiB
PHP
113 lines
3.5 KiB
PHP
<?php
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/**
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* HTML parser implementation. It only implements links.
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*
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* @author Josep Arús
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*
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* @license http://www.gnu.org/copyleft/gpl.html GNU Public License
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* @package mod_wiki
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*/
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include_once("nwiki.php");
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class html_parser extends nwiki_parser {
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protected $blockrules = array();
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protected $section_editing = true;
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/** @var int Minimum level of the headers on the page (usually tinymce uses <h1> and atto <h3>) */
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protected $minheaderlevel = null;
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public function __construct() {
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parent::__construct();
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// The order is important, headers should be parsed before links.
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$this->tagrules = array(
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// Headers are considered tags here.
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'header' => array(
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'expression' => "/<\s*h([1-6])\s*>(.+?)<\/h[1-6]>/is"
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),
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'link' => $this->tagrules['link'],
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'url' => $this->tagrules['url']
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);
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}
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/**
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* Find minimum header level used on the page (<h1>, <h3>, ...)
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*
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* @param string $text
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* @return int
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*/
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protected function find_min_header_level($text) {
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preg_match_all($this->tagrules['header']['expression'], $text, $matches);
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return !empty($matches[1]) ? min($matches[1]) : 1;
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}
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protected function before_parsing() {
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parent::before_parsing();
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$this->minheaderlevel = $this->find_min_header_level($this->string);
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// Protect all explicit links from further wiki parsing. The link text may contain another URL which would get
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// converted into another link via {@see nwiki_parser::$tagrules} 'url' element.
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if (preg_match_all('/<a\s[^>]+?>(.*?)<\/a>/is', $this->string, $matches)) {
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foreach (array_unique($matches[0]) as $match) {
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$this->string = str_replace($match, $this->protect($match), $this->string);
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}
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}
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$this->rules($this->string);
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}
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/**
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* Header tag rule
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* @param array $match Header regex match
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* @return string
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*/
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protected function header_tag_rule($match) {
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return $this->generate_header($match[2], (int)$match[1] - $this->minheaderlevel + 1);
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}
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/**
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* Section editing: Special for HTML Parser (It parses <h1></h1>)
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*/
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public function get_section($header, $text, $clean = false) {
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if ($clean) {
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$text = preg_replace('/\r\n/', "\n", $text);
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$text = preg_replace('/\r/', "\n", $text);
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$text .= "\n\n";
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}
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$minheaderlevel = $this->find_min_header_level($text);
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$h1 = array("<\s*h{$minheaderlevel}\s*>", "<\/h{$minheaderlevel}>");
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$regex = "/(.*?)({$h1[0]}\s*".preg_quote($header, '/')."\s*{$h1[1]}.*?)((?:{$h1[0]}.*)|$)/is";
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preg_match($regex, $text, $match);
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if (!empty($match)) {
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return array($match[1], $match[2], $match[3]);
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} else {
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return false;
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}
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}
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protected function get_repeated_sections(&$text, $repeated = array()) {
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$this->repeated_sections = $repeated;
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return preg_replace_callback($this->tagrules['header'], array($this, 'get_repeated_sections_callback'), $text);
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}
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protected function get_repeated_sections_callback($match) {
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$text = trim($match[2]);
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if (in_array($text, $this->repeated_sections)) {
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$this->returnvalues['repeated_sections'][] = $text;
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return parser_utils::h('p', $text);
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} else {
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$this->repeated_sections[] = $text;
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}
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return $match[0];
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}
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}
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