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1 <?php 2 3 /** 4 * HTML parser implementation. It only implements links. 5 * 6 * @author Josep ArĂºs 7 * 8 * @license http://www.gnu.org/copyleft/gpl.html GNU Public License 9 * @package mod_wiki 10 */ 11 include_once ("nwiki.php"); 12 13 class html_parser extends nwiki_parser { 14 protected $blockrules = array(); 15 16 protected $section_editing = true; 17 18 /** @var int Minimum level of the headers on the page (usually tinymce uses <h1> and atto <h3>) */ 19 protected $minheaderlevel = null; 20 21 public function __construct() { 22 parent::__construct(); 23 // The order is important, headers should be parsed before links. 24 $this->tagrules = array( 25 // Headers are considered tags here. 26 'header' => array( 27 'expression' => "/<\s*h([1-6])\s*>(.+?)<\/h[1-6]>/is" 28 ), 29 'link' => $this->tagrules['link'], 30 'url' => $this->tagrules['url'] 31 ); 32 } 33 34 /** 35 * Find minimum header level used on the page (<h1>, <h3>, ...) 36 * 37 * @param string $text 38 * @return int 39 */ 40 protected function find_min_header_level($text) { 41 preg_match_all($this->tagrules['header']['expression'], $text, $matches); 42 return !empty($matches[1]) ? min($matches[1]) : 1; 43 } 44 45 protected function before_parsing() { 46 parent::before_parsing(); 47 48 $this->minheaderlevel = $this->find_min_header_level($this->string); 49 50 // Protect all explicit links from further wiki parsing. The link text may contain another URL which would get 51 // converted into another link via {@see nwiki_parser::$tagrules} 'url' element. 52 if (preg_match_all('/<a\s[^>]+?>(.*?)<\/a>/is', $this->string, $matches)) { 53 foreach (array_unique($matches[0]) as $match) { 54 $this->string = str_replace($match, $this->protect($match), $this->string); 55 } 56 } 57 58 $this->rules($this->string); 59 } 60 61 /** 62 * Header tag rule 63 * @param array $match Header regex match 64 * @return string 65 */ 66 protected function header_tag_rule($match) { 67 return $this->generate_header($match[2], (int)$match[1] - $this->minheaderlevel + 1); 68 } 69 70 /** 71 * Section editing: Special for HTML Parser (It parses <h1></h1>) 72 */ 73 74 public function get_section($header, $text, $clean = false) { 75 if ($clean) { 76 $text = preg_replace('/\r\n/', "\n", $text); 77 $text = preg_replace('/\r/', "\n", $text); 78 $text .= "\n\n"; 79 } 80 81 $minheaderlevel = $this->find_min_header_level($text); 82 83 $h1 = array("<\s*h{$minheaderlevel}\s*>", "<\/h{$minheaderlevel}>"); 84 85 $regex = "/(.*?)({$h1[0]}\s*".preg_quote($header, '/')."\s*{$h1[1]}.*?)((?:{$h1[0]}.*)|$)/is"; 86 preg_match($regex, $text, $match); 87 88 if (!empty($match)) { 89 return array($match[1], $match[2], $match[3]); 90 } else { 91 return false; 92 } 93 } 94 95 protected function get_repeated_sections(&$text, $repeated = array()) { 96 $this->repeated_sections = $repeated; 97 return preg_replace_callback($this->tagrules['header'], array($this, 'get_repeated_sections_callback'), $text); 98 } 99 100 protected function get_repeated_sections_callback($match) { 101 $text = trim($match[2]); 102 103 if (in_array($text, $this->repeated_sections)) { 104 $this->returnvalues['repeated_sections'][] = $text; 105 return parser_utils::h('p', $text); 106 } else { 107 $this->repeated_sections[] = $text; 108 } 109 110 return $match[0]; 111 } 112 }
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