Traversing: Don't expose jQuery.dir & jQuery.sibling

jQuery.dir & jQuery.sibling are undocumented internal APIs; they shouldn't
be exposed.

(cherry-picked from f9ef427d355a8a2b531aed5d112dfa4f9692105c)

Fixes gh-2512
Closes gh-2525

3 files changed, 46 insertions, 38 deletions

diff --git a/src/traversing.js b/src/traversing.js
index ad041821b..addc79080 100644
--- a/src/traversing.js
+++ b/src/traversing.js
@@ -1,10 +1,12 @@
 define( [
 	"./core",
+	"./traversing/var/dir",
+	"./traversing/var/siblings",
 	"./traversing/var/rneedsContext",
 	"./core/init",
 	"./traversing/findFilter",
 	"./selector"
-], function( jQuery, rneedsContext ) {
+], function( jQuery, dir, siblings, rneedsContext ) {
 
 var rparentsprev = /^(?:parents|prev(?:Until|All))/,
 
@@ -16,35 +18,6 @@ var rparentsprev = /^(?:parents|prev(?:Until|All))/,
 		prev: true
 	};
 
-jQuery.extend( {
-	dir: function( elem, dir, until ) {
-		var matched = [],
-			cur = elem[ dir ];
-
-		while ( cur && cur.nodeType !== 9 &&
-			( until === undefined || cur.nodeType !== 1 || !jQuery( cur ).is( until ) ) ) {
-
-			if ( cur.nodeType === 1 ) {
-				matched.push( cur );
-			}
-			cur = cur[ dir ];
-		}
-		return matched;
-	},
-
-	sibling: function( n, elem ) {
-		var r = [];
-
-		for ( ; n; n = n.nextSibling ) {
-			if ( n.nodeType === 1 && n !== elem ) {
-				r.push( n );
-			}
-		}
-
-		return r;
-	}
-} );
-
 jQuery.fn.extend( {
 	has: function( target ) {
 		var i,
@@ -139,10 +112,10 @@ jQuery.each( {
 		return parent && parent.nodeType !== 11 ? parent : null;
 	},
 	parents: function( elem ) {
-		return jQuery.dir( elem, "parentNode" );
+		return dir( elem, "parentNode" );
 	},
 	parentsUntil: function( elem, i, until ) {
-		return jQuery.dir( elem, "parentNode", until );
+		return dir( elem, "parentNode", until );
 	},
 	next: function( elem ) {
 		return sibling( elem, "nextSibling" );
@@ -151,22 +124,22 @@ jQuery.each( {
 		return sibling( elem, "previousSibling" );
 	},
 	nextAll: function( elem ) {
-		return jQuery.dir( elem, "nextSibling" );
+		return dir( elem, "nextSibling" );
 	},
 	prevAll: function( elem ) {
-		return jQuery.dir( elem, "previousSibling" );
+		return dir( elem, "previousSibling" );
 	},
 	nextUntil: function( elem, i, until ) {
-		return jQuery.dir( elem, "nextSibling", until );
+		return dir( elem, "nextSibling", until );
 	},
 	prevUntil: function( elem, i, until ) {
-		return jQuery.dir( elem, "previousSibling", until );
+		return dir( elem, "previousSibling", until );
 	},
 	siblings: function( elem ) {
-		return jQuery.sibling( ( elem.parentNode || {} ).firstChild, elem );
+		return siblings( ( elem.parentNode || {} ).firstChild, elem );
 	},
 	children: function( elem ) {
-		return jQuery.sibling( elem.firstChild );
+		return siblings( elem.firstChild );
 	},
 	contents: function( elem ) {
 		return elem.contentDocument || jQuery.merge( [], elem.childNodes );
diff --git a/src/traversing/var/dir.js b/src/traversing/var/dir.js
new file mode 100644
index 000000000..b98fdca0e
--- /dev/null
+++ b/src/traversing/var/dir.js
@@ -0,0 +1,20 @@
+define( [
+	"../../core"
+], function( jQuery ) {
+
+return function( elem, dir, until ) {
+	var matched = [],
+		truncate = until !== undefined;
+
+	while ( ( elem = elem[ dir ] ) && elem.nodeType !== 9 ) {
+		if ( elem.nodeType === 1 ) {
+			if ( truncate && jQuery( elem ).is( until ) ) {
+				break;
+			}
+			matched.push( elem );
+		}
+	}
+	return matched;
+};
+
+} );
diff --git a/src/traversing/var/siblings.js b/src/traversing/var/siblings.js
new file mode 100644
index 000000000..8a8880bf7
--- /dev/null
+++ b/src/traversing/var/siblings.js
@@ -0,0 +1,15 @@
+define( function() {
+
+return function( n, elem ) {
+	var matched = [];
+
+	for ( ; n; n = n.nextSibling ) {
+		if ( n.nodeType === 1 && n !== elem ) {
+			matched.push( n );
+		}
+	}
+
+	return matched;
+};
+
+} );