Introduce smart mode ($wgLinkTitlesSmartmode).

Smart mode generates aliases for page titles if a case mismatch is
detected.

LinkTitles.body.php

@@ -29,7 +29,7 @@
 	};
 
 	class LinkTitles {
-		static $st;
+		static $safeTitle;
 
 		/// Setup function, hooks the extension's functions to MediaWiki events.
 		public static function setup() {
@@ -72,6 +72,7 @@
 
 		/// This function performs the actual parsing of the content.
 		static function parseContent( &$article, &$text ) {
+
 			// Configuration variables need to be defined here as globals.
 			global $wgLinkTitlesPreferShortTitles;
 			global $wgLinkTitlesMinimumTitleLength;
@@ -82,6 +83,7 @@
 			global $wgLinkTitlesWordStartOnly;
 			global $wgLinkTitlesWordEndOnly;
 			// global $wgLinkTitlesIgnoreCase;
+			global $wgLinkTitlesSmartMode;
 
 			( $wgLinkTitlesWordStartOnly ) ? $wordStartDelim = '\b' : $wordStartDelim = '';
 			( $wgLinkTitlesWordEndOnly ) ? $wordEndDelim = '\b' : $wordEndDelim = '';
@@ -142,34 +144,53 @@
 				$title = str_replace('_', ' ', $row->page_title);
 
 				if ( $title != $myTitle ) {
+					LinkTitles::$safeTitle = str_replace( '/', '\/', $title );
+
 					// split the string by [[...]] groups
 					// credits to inhan @ StackOverflow for suggesting preg_split
 					// see http://stackoverflow.com/questions/10672286
 					$arr = preg_split( $delimiter, $text, -1, PREG_SPLIT_DELIM_CAPTURE );
-					// dump( $arr );
+
-					$safeTitle = str_replace( '/', '\/', $title );
-					LinkTitles::$st = $safeTitle;
 					for ( $i = 0; $i < count( $arr ); $i+=2 ) {
 						// even indexes will point to text that is not enclosed by brackets
-						$arr[$i] = preg_replace_callback( '/(?<![\:\.\@\/\?\&])' .
+						$arr[$i] = preg_replace( '/(?<![\:\.\@\/\?\&])' .
-							$wordStartDelim . '(' . $safeTitle . ')' . 
+							$wordStartDelim . '((?i)' . LinkTitles::$safeTitle[0] . '(?-i)' . 
-							$wordEndDelim . '/i', 
+							substr(LinkTitles::$safeTitle, 1) . ')' . $wordEndDelim . '/', 
-							"LinkTitles::CallBack", $arr[$i], $limit, $count );
+							'[[$1]]', $arr[$i], $limit, $count );
 						if (( $limit >= 0 ) && ( $count > 0  )) {
 							break; 
 						};
 					};
 					$text = implode( '', $arr );
+
+					if ($wgLinkTitlesSmartMode) {
+						// split the string by [[...]] groups
+						// credits to inhan @ StackOverflow for suggesting preg_split
+						// see http://stackoverflow.com/questions/10672286
+						$arr = preg_split( $delimiter, $text, -1, PREG_SPLIT_DELIM_CAPTURE );
+
+						for ( $i = 0; $i < count( $arr ); $i+=2 ) {
+							// even indexes will point to text that is not enclosed by brackets
+							$arr[$i] = preg_replace_callback( '/(?<![\:\.\@\/\?\&])' .
+								$wordStartDelim . '(' . LinkTitles::$safeTitle . ')' . 
+								$wordEndDelim . '/i', 
+								"LinkTitles::CallBack", $arr[$i], $limit, $count );
+							if (( $limit >= 0 ) && ( $count > 0  )) {
+								break; 
+							};
+						};
+						$text = implode( '', $arr );
+					}
 				}; // if $title != $myTitle
 			}; // foreach $res as $row
 			return true;
 		}
 
 		static function CallBack($matches) {
-			if ( strcmp(substr(LinkTitles::$st, 1), substr($matches[0], 1)) == 0 ) {
+			if ( strcmp(substr(LinkTitles::$safeTitle, 1), substr($matches[0], 1)) == 0 ) {
 				return '[[' . $matches[0] . ']]';
 			} else  {
-				return '[[' . LinkTitles::$st . '|' . $matches[0] . ']]';
+				return '[[' . LinkTitles::$safeTitle . '|' . $matches[0] . ']]';
 			}
 		}
 	}

LinkTitles.php

@@ -43,13 +43,14 @@
 	$wgLinkTitlesWordStartOnly = true;
 	$wgLinkTitlesWordEndOnly = true;
 //	$wgLinkTitlesIgnoreCase = true;
+	$wgLinkTitlesSmartMode = true;
 
   $wgExtensionCredits['parserhook'][] = array(
     'path'           => __FILE__,
     'name'           => 'LinkTitles',
     'author'         => '[http://www.mediawiki.org/wiki/User:Bovender Daniel Kraus]', 
     'url'            => 'http://www.mediawiki.org/wiki/Extension:LinkTitles',
-    'version'        => '1.8.1',
+    'version'        => '2.0.0',
     'descriptionmsg' => 'linktitles-desc'
     );
 

NEWS

@@ -1,3 +1,8 @@
+LinkTitles 2.0.0: 2013-01-29
+* Introduced a new 'smart mode' ($wgLinkTitlesSmartMode) which is enabled by
+  default and will automatically generate aliased links if there is a case
+  mismatch. To increase performance, this smart mode can be disabled.
+
 LinkTitles 1.8.1: 2013-01-26
 * The extension will now automatically generate aliases for case-mismatched
   page titles.
@@ -66,4 +71,4 @@ LinkTitles 0.0.2: 2012-05-20
 LinkTitles 0.0.1: 2012-05-20
 * Initial release.
 
-# vim: fo=tqn:flp=\*\s 
+# vim: tw=76:fo=tqn:flp=^\*\s