Rewrote the public-facing OS X control macro.

redo/reredo/ui.h

@@ -49,6 +49,7 @@ struct Sizing {
 typedef struct uiControl uiControl;
 
 struct uiControl {
+	uiTyped t;
 	void *Internal;		// for use by libui only
 	void (*CommitDestroy)(uiControl *);
 	uintptr_t (*Handle)(uiControl *);

redo/reredo/ui_darwin.h

@@ -0,0 +1,48 @@
+// 7 april 2015
+
+/*
+This file assumes that you have imported <Cocoa/Cocoa.h> and "ui.h" beforehand. It provides API-specific functions for interfacing with foreign controls on Mac OS X.
+*/
+
+#ifndef __LIBUI_UI_DARWIN_H__
+#define __LIBUI_UI_DARWIN_H__
+
+// TODO document
+#define uiDarwinDefineControlWithOnDestroy(type, typefn, handlefield, onDestroy) \
+	static uintmax_t _ ## type ## Type = 0; \
+	uintmax_t typefn(void) \
+	{ \
+		if (_ ## type ## Type == 0) \
+			_ ## type ## Type = uiRegisterType(#type, uiDarwinControlType(), sizeof (type)); \
+		return _ ## type ## Type; \
+	} \
+	static void _ ## type ## CommitDestroy(uiControl *c) \
+	{ \
+		type *this = type(c); \
+		onDestroy; \
+		[this->handlefield release]; \
+	} \
+	static uintptr_t _ ## type ## Handle(uiControl *c) \
+	{ \
+		return type(c)->handlefield; \
+	}
+
+#define uiDarwinDefineControl(type, typefn, handlefield) \
+	uiDarwinDefineControlWithOnDestroy(type, typefn, handlefield, (void) this;)
+
+#define uiDarwinFinishNewControl(variable, type) \
+	type(variable)->CommitDestroy = _ ## type ## CommitDestroy; \
+	type(variable)->Handle = _ ## type ## Handle; \
+	uiDarwinFinishControl(uiControl(variable));
+
+// This is a function used to set up a control.
+// Don't call it directly; use uiDarwinFinishNewControl() instead.
+_UI_EXTERN void uiDarwinFinishControl(uiControl *c);
+
+// Use this function as a shorthand for setting control fonts.
+_UI_EXTERN void uiDarwinSetControlFont(NSControl *c, NSControlSize size);
+
+// You can use this function from within your control implementations to return text strings that can be freed with uiFreeText().
+_UI_EXTERN char *uiDarwinNSStringToText(NSString *);
+
+#endif