added some outline view extensions.

NSOutlineView+Additions.h

@@ -0,0 +1,17 @@
+//
+//  NSOutlineView+Additions.h
+//  gitty
+//
+//  Created by brandon on 1/17/11.
+//  Copyright 2011 __MyCompanyName__. All rights reserved.
+//
+
+#import <Cocoa/Cocoa.h>
+
+
+@interface NSOutlineView(Additions)
+
+- (void)expandParentsOfItem:(id)item;
+- (void)selectItem:(id)item;
+
+@end

NSOutlineView+Additions.m

@@ -0,0 +1,41 @@
+//
+//  NSOutlineView+Additions.m
+//  gitty
+//
+//  Created by brandon on 1/17/11.
+//  Copyright 2011 __MyCompanyName__. All rights reserved.
+//
+
+#import "NSOutlineView+Additions.h"
+
+
+@implementation NSOutlineView(Additions)
+
+- (void)expandParentsOfItem:(id)item 
+{
+    while (item != nil)
+	{
+        id parent = [self parentForItem: item];
+        if (![self isExpandable: parent])
+            break;
+        if (![self isItemExpanded: parent])
+            [self expandItem: parent];
+        item = parent;
+    }
+}
+
+- (void)selectItem:(id)item 
+{
+    NSInteger itemIndex = [self rowForItem:item];
+    if (itemIndex < 0)
+	{
+        [self expandParentsOfItem: item];
+        itemIndex = [self rowForItem:item];
+        if (itemIndex < 0)
+            return;
+    }
+
+    [self selectRowIndexes:[NSIndexSet indexSetWithIndex:itemIndex] byExtendingSelection:NO];
+}
+
+@end