Extension-Lingo/Lingo.php at master · tklein/Extension-Lingo · GitHub

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<?php
/*
 * For more info see http://mediawiki.org/wiki/Extension:Lingo
 *
 * @package MediaWiki
 * @subpackage Extensions
 * @author Barry Coughlan
 * @copyright © 2010 Barry Coughlan
 * @licence GNU General Public Licence 2.0 or later
 */

$wgExtensionCredits['parserhook'][] = array(
  'name' => 'Lingo',
  'description' => 'Provides hover-over tool tips on articles from words defined on [[Terminology]] page',
  'version' => '20110108',
  'url' => 'http://mediawiki.org/wiki/Extension:Lingo',
  'author' => 'Barry Coughlan, a more efficient rewrite of Extension:Terminology (BarkerJr & Benjamin Kahn)'
);

$wgHooks['OutputPageBeforeHTML'][] = 'lingoHook';
function lingoHook(&$out, &$text) {
	global $wgOut, $wgScriptPath;
	$out->includeJQuery();
	$out->addHeadItem('tooltip.css','<link rel="stylesheet" type="text/css" href="'.$wgScriptPath.'/extensions/Lingo/tooltip.css"/>');
	$out->addHeadItem('tooltip.js','<script type="text/javascript" src="'.$wgScriptPath.'/extensions/Lingo/tooltip.min.js"></script>');
	return $out;
}

function getLingoArray(&$content) {
	$term = array();
	$c = explode("\n", $content);

	foreach ($c as $entry) {
		if (empty($entry) || $entry[0] !== ';') continue;

		$terms = explode(':', $entry, 2);
		if (count($terms) < 2) continue; //Invalid syntax

		//Add to array
		$term[trim(substr($terms[0], 1))] = trim($terms[1]);
	}
	return $term;
}

$wgHooks['ParserAfterTidy'][] = 'lingoParser';
function lingoParser(&$parser, &$text) {
	global $wgRequest;
	$action = $wgRequest->getVal( 'action', 'view' );
	if ($action=="edit" || $action=="ajax" || isset($_POST['wpPreview'])) return false;

	//Get Terminology page
	$rev = Revision::newFromTitle(Title::makeTitle(null, 'Terminology'));
	if (!$rev) return false;
	$content = &$rev->getText();
	if (empty($content)) return false;

	//Get array of terms
	$terms = getLingoArray($content);
	//Get the minimum length abbreviation so we don't bother checking against words shorter than that
	$min = min(array_map('strlen', array_keys($terms)));

	//Parse HTML from page
	$doc = new DOMDocument();
	$text = '<html><meta http-equiv="content-type" content="charset=utf-8"/>'.$text."</html>";
	@$doc->loadHTML($text);
	//Find all text in HTML.
	$xpath = new DOMXpath($doc);
	$elements = $xpath->query("//*[text()!=' ']/text()");

	//Iterate all HTML text matches
	$nb = $elements->length;
	$changed = false;
	for($pos=0; $pos<$nb; $pos++) {
		$el = &$elements->item($pos);
		if(strlen($el->nodeValue) < $min) continue;

		//Split node text into words, putting offset and text into $offsets[0] array
		preg_match_all("/\b[^\b\s\.,;:]+/", $el->nodeValue, $offsets, PREG_OFFSET_CAPTURE);

		//Search and replace words in reverse order (from end of string backwards),
		//This way we don't mess up the offsets of the words as we iterate
		$len=count($offsets[0]);
		for ($i=$len-1; $i>=0; $i--) {
			$offset=$offsets[0][$i];
			//Check if word is an abbreviation from the terminologies
			if ( !is_numeric($offset[0]) && isset($terms[$offset[0]])) {	//Word matches, replace with appropriate span tag
				$changed = true;

				$tip = htmlentities($terms[$offset[0]]);

				$beforeMatchNode = $doc->createTextNode (substr($el->nodeValue, 0, $offset[1]));
				$afterMatchNode = $doc->createTextNode (substr($el->nodeValue,$offset[1]+strlen($offset[0]),strlen($el->nodeValue)-1));

				//Wrap abbreviation in <span> tags
				$span = @$doc->createElement('span', $offset[0]);
				$span->setAttribute('class', "tooltip_abbr");

				//Wrap definition in <span> tags, hidden
				$spanTip = @$doc->createElement('span', $tip);
				$spanTip->setAttribute('class', "tooltip_hide");

				$el->parentNode->insertBefore($beforeMatchNode, $el);
				$el->parentNode->insertBefore($span, $el);
				$span->appendChild($spanTip);
				$el->parentNode->insertBefore($afterMatchNode, $el);
				$el->parentNode->removeChild($el);
				$el = $beforeMatchNode; //Set new element to the text before the match for next iteration
			}
		}
	}

	if ($changed) {
		$text = $doc->saveHTML();
	}

	return true;
}