gistfile1.txt

using System;
using System.Drawing;
using MonoMac.Foundation;
using MonoMac.AppKit;
using MonoMac.ObjCRuntime;
using System.Runtime.InteropServices;
using System.Linq;

namespace ClassicTest
{
	public static class NSLayoutManagerPatch
	{
		// - (NSRectArray)rectArrayForGlyphRange:(NSRange)glyphRange withinSelectedGlyphRange:(NSRange)selGlyphRange inTextContainer:(NSTextContainer *)container rectCount:(NSUInteger *)rectCount 
		static IntPtr sel = Selector.GetHandle ("rectArrayForGlyphRange:withinSelectedGlyphRange:inTextContainer:rectCount:");

		[DllImport ("/usr/lib/libobjc.dylib", EntryPoint="objc_msgSend")]
		public extern static IntPtr IntPtr_objc_msgSend (IntPtr receiver, IntPtr selector, NSRange glyphRange, NSRange selectedGlyphRange, IntPtr textContainerHandle, out uint rectCount);

		public unsafe static RectangleF [] RectArrayForGlyphRange (this NSLayoutManager manager, NSRange glyphRange, NSRange selectedGlyphRange, NSTextContainer textContainer)
		{
			uint rectCount;
			IntPtr retHandle = IntPtr_objc_msgSend (manager.Handle, sel, glyphRange, selectedGlyphRange, textContainer.Handle, out rectCount);
			RectangleF[] returnArray = new RectangleF [rectCount];

			float * ptr = (float*)retHandle;
			for (int i = 0; i < rectCount; ++i) {
				returnArray [i] = new RectangleF (ptr [0], ptr [1], ptr [2], ptr [3]);
				ptr += 4;
			}
			return returnArray;
		}
	}

	public partial class AppDelegate : NSApplicationDelegate
	{
		MainWindowController mainWindowController;

		public AppDelegate ()
		{
		}

		public override void DidFinishLaunching (NSNotification notification)
		{
			mainWindowController = new MainWindowController ();
			mainWindowController.Window.MakeKeyAndOrderFront (this);

			NSTextView v = new NSTextView (new RectangleF (0, 0, 100, 100));
			v.InsertText ((NSString)"Hello world");
			NSTextView v2 = new NSTextView (new RectangleF (0, 0, 100, 100));
			v2.InsertText ((NSString)"Goodbye world");
			mainWindowController.Window.ContentView.AddSubview (v);
			mainWindowController.Window.ContentView.AddSubview (v2);

			NSTextContainer first = v.TextContainer;
			NSTextContainer second = v2.TextContainer;

			NSLayoutManager mgr = v.LayoutManager;
			mgr.AddTextContainer (first);
			mgr.InsertTextContainer (second, 1);
			RectangleF [] vals = mgr.RectArrayForGlyphRange (new NSRange (1, 3), new NSRange (2, 4), first);
		}
	}
}