Monodroid TextViewWithUrls

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;

using Android.App;
using Android.Content;
using Android.OS;
using Android.Runtime;
using Android.Views;
using Android.Widget;
using Android.Util;
using Android.Text;
using Android.Text.Method;
using Android.Text.Style;

namespace Android.TweetBox.Views
{
    public class TextViewWithUrls : TextView
    {
        public bool DontConsumeNonUrlClicks = true;
        public bool LinkHit;

        public TextViewWithUrls (Context context) : base(context)
        {
        }

        public TextViewWithUrls (Context context, IAttributeSet attrs) : base(context, attrs)
        {
        }

        public TextViewWithUrls (Context context, IAttributeSet attrs, int defStyle) : base(context, attrs, defStyle)
        {
        }

        public override bool OnTouchEvent (MotionEvent e)
        {
            LinkHit = false;
            bool res = base.OnTouchEvent (e);

            if (DontConsumeNonUrlClicks)
                return LinkHit;
            return res;
        }
    }

    public class LocalLinkMovementMethod : LinkMovementMethod
    {
        public static LocalLinkMovementMethod sInstance;


        public static LocalLinkMovementMethod GetInstance ()
        {
            if (sInstance == null)
                sInstance = new LocalLinkMovementMethod ();

            return sInstance;
        }

        public override bool OnTouchEvent (TextView widget, Android.Text.ISpannable buffer, MotionEvent e)
        {
            MotionEventActions action = e.Action;

            if (action == MotionEventActions.Up || action == MotionEventActions.Down) {
                int x = (int)e.GetX ();
                int y = (int)e.GetY ();

                x -= widget.PaddingLeft;
                y -= widget.PaddingTop;

                x += widget.ScrollX;
                y += widget.ScrollY;

                Layout layout = widget.Layout;
                int line = layout.GetLineForVertical (y);
                int off = layout.GetOffsetForHorizontal (line, x);

                Object[] link = buffer.GetSpans (off, off, Java.Lang.Class.FromType (typeof(ClickableSpan)));

                if (link.Length > 0) {
                    Console.WriteLine ("ClickableSpan");
                    if (action == MotionEventActions.Up) {
                        ((ClickableSpan)link [0]).OnClick (widget);
                    } else if (action == MotionEventActions.Down) {
                        Selection.SetSelection (buffer, buffer.GetSpanStart ((ClickableSpan)link [0]), buffer.GetSpanEnd ((ClickableSpan)link [0]));
                    }

                    if (widget.GetType ().Equals (typeof(TextViewWithUrls))) {
                        ((TextViewWithUrls)widget).LinkHit = true;
                    }
                    return true;
                } else {
                    Selection.RemoveSelection (buffer);
                    base.OnTouchEvent (widget, buffer, e);
                    return false;
                }
            }
            return base.OnTouchEvent (widget, buffer, e);
        }
    }
}