diff --git a/redo/reredo/darwin/autolayout.m b/redo/reredo/darwin/autolayout.m
new file mode 100644
index 00000000..50d1b193
--- /dev/null
+++ b/redo/reredo/darwin/autolayout.m
@@ -0,0 +1,33 @@
+// 15 august 2015
+#import "uipriv_darwin.h"
+
+void addConstraint(NSView *view, NSString *constraint, NSDictionary *metrics, NSDictionary *views)
+{
+	NSArray *constraints;
+
+	constraints = [NSLayoutConstraint constraintsWithVisualFormat:constraint
+		options:0
+		metrics:metrics
+		views:views];
+	[view addConstraints:constraints];
+}
+
+void layoutSingleView(NSView *superview, NSView *subview, int margined)
+{
+	NSDictionary *views;
+	NSString *constraint;
+
+	[superview removeConstraints:[superview constraints]];
+
+	views = NSDictionaryOfVariableBindings(subview);
+
+	constraint = @"H:|[subview]|";
+	if (margined)
+		constraint = @"H:|-[subview]-|";
+	addConstraint(superview, constraint, nil, views);
+
+	constraint = @"V:|[subview]|";
+	if (margined)
+		constraint = @"V:|-[subview]-|";
+	addConstraint(superview, constraint, nil, views);
+}