Merge "Show revdel links instead of checkboxes on pages where there is no multiple...

[lhc/web/wiklou.git] / resources / jquery / jquery.tabIndex.js

diff --git a/resources/jquery/jquery.tabIndex.js b/resources/jquery/jquery.tabIndex.js
index 3bce092..75731d7 100644 (file)
--- a/resources/jquery/jquery.tabIndex.js
+++ b/resources/jquery/jquery.tabIndex.js
@@ -1,30 +1,50 @@
+/**
+ * jQuery tabIndex
+ */
+( function( $ ) {
 /**
  * Finds the lowerst tabindex in use within a selection
- * 
- * @return Integer of lowest tabindex on the page
+ *
+ * @return number Lowest tabindex on the page
  */
-jQuery.fn.firstTabIndex = function() {
-       var minTabIndex = 0;
+$.fn.firstTabIndex = function() {
+       var minTabIndex = null;
        $(this).find( '[tabindex]' ).each( function() {
-               var tabIndex = parseInt( $(this).attr( 'tabindex' ) );
-               if ( tabIndex > minTabIndex ) {
-                       minTabIndex = tabIndex;
+               var tabIndex = parseInt( $(this).prop( 'tabindex' ), 10 );
+               // In IE6/IE7 the above jQuery selector returns all elements,
+               // becuase it has a default value for tabIndex in IE6/IE7 of 0
+               // (rather than null/undefined). Therefore check "> 0" as well.
+               // Under IE7 under Windows NT 5.2 is also capable of returning NaN.
+               if ( tabIndex > 0 && !isNaN( tabIndex ) ) {
+                       // Initial value
+                       if ( minTabIndex === null ) {
+                               minTabIndex = tabIndex;
+                       } else if ( tabIndex < minTabIndex ) {
+                               minTabIndex = tabIndex;
+                       }
                }
        } );
        return minTabIndex;
 };
+
 /**
  * Finds the highest tabindex in use within a selection
- * 
- * @return Integer of highest tabindex on the page
+ *
+ * @return number Highest tabindex on the page
  */
-jQuery.fn.lastTabIndex = function() {
-       var maxTabIndex = 0;
+$.fn.lastTabIndex = function() {
+       var maxTabIndex = null;
        $(this).find( '[tabindex]' ).each( function() {
-               var tabIndex = parseInt( $(this).attr( 'tabindex' ) );
-               if ( tabIndex > maxTabIndex ) {
-                       maxTabIndex = tabIndex;
+               var tabIndex = parseInt( $(this).prop( 'tabindex' ), 10 );
+               if ( tabIndex > 0 && !isNaN( tabIndex ) ) {
+                       // Initial value
+                       if ( maxTabIndex === null ) {
+                               maxTabIndex = tabIndex;
+                       } else if ( tabIndex > maxTabIndex ) {
+                               maxTabIndex = tabIndex;
+                       }
                }
        } );
        return maxTabIndex;
-};
\ No newline at end of file
+};
+} )( jQuery );