Source/Ribbon/FadeAnimator.cs

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using System;
using System.Text;
using System.Collections;
using System.Threading;

namespace DevComponents.DotNetBar
{
    internal class FadeAnimator
    {
        // Fields
        private static Thread fadeThread;
        private static ArrayList fadeInfoList;
        private static ReaderWriterLock rwImgListLock;
        [ThreadStatic]
        private static int threadWriterLockWaitCount;

        // Methods
        static FadeAnimator()
        {
            FadeAnimator.rwImgListLock = new ReaderWriterLock();
        }

        private FadeAnimator() {}

        public static void Fade(object caller, EventHandler onFadeChangedHandler)
        {
            if (caller != null)
            {
                FadeAnimator.FadeInfo fadeInfo = null;
                lock (caller)
                {
                    fadeInfo = new FadeAnimator.FadeInfo(caller);
                }
                FadeAnimator.StopFade(caller, onFadeChangedHandler);
                bool flag1 = FadeAnimator.rwImgListLock.IsReaderLockHeld;
                LockCookie cookie1 = new LockCookie();
                FadeAnimator.threadWriterLockWaitCount++;
                try
                {
                    if (flag1)
                    {
                        cookie1 = FadeAnimator.rwImgListLock.UpgradeToWriterLock(-1);
                    }
                    else
                    {
                        FadeAnimator.rwImgListLock.AcquireWriterLock(-1);
                    }
                }
                finally
                {
                    FadeAnimator.threadWriterLockWaitCount--;
                }
                try
                {
                    if (FadeAnimator.fadeInfoList == null)
                    {
                        FadeAnimator.fadeInfoList = new ArrayList();
                    }
                    fadeInfo.FadeChangedHandler = onFadeChangedHandler;
                    FadeAnimator.fadeInfoList.Add((FadeAnimator.FadeInfo)fadeInfo);