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-rw-r--r--resources/src/jquery/jquery.tabIndex.js57
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diff --git a/resources/src/jquery/jquery.tabIndex.js b/resources/src/jquery/jquery.tabIndex.js
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+/**
+ * @class jQuery.plugin.tabIndex
+ */
+( function ( $ ) {
+
+ /**
+ * Find the lowest tabindex in use within a selection.
+ *
+ * @return {number} Lowest tabindex on the page
+ */
+ $.fn.firstTabIndex = function () {
+ var minTabIndex = null;
+ $(this).find( '[tabindex]' ).each( function () {
+ 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;
+ };
+
+ /**
+ * Find the highest tabindex in use within a selection.
+ *
+ * @return {number} Highest tabindex on the page
+ */
+ $.fn.lastTabIndex = function () {
+ var maxTabIndex = null;
+ $(this).find( '[tabindex]' ).each( function () {
+ 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;
+ };
+
+ /**
+ * @class jQuery
+ * @mixins jQuery.plugin.tabIndex
+ */
+
+}( jQuery ) );