ZuneShell.dll/ZuneDBApi/MicrosoftZuneLibrary/VirtualDatabaseList.cs

using System;
using System.Collections;
using System.Reflection;
using System.Runtime.InteropServices;
using Microsoft.Iris;

namespace MicrosoftZuneLibrary
{
	[DefaultMember("Item")]
	public class VirtualDatabaseList : VirtualList, IQueryListEvents, IDisposable
	{
		protected int m_QueryRN;

		protected ZuneQueryList m_pQueryList;

		protected bool m_fInBulkEvents;

		protected bool m_fDisposed;

		protected ArrayList m_lNotifyData;

		protected int m_blockChangesFlags;

		protected bool m_fBlockChanges;

		protected bool m_fEndBulkArrivedDuringBlock;

		protected bool m_fItemsAdded;

		internal VirtualDatabaseList(ZuneQueryList pQueryList, [MarshalAs(UnmanagedType.U1)] bool enableSlowDataRequests)
			: base(enableSlowDataRequests)
		{
			try
			{
				m_pQueryList = pQueryList;
				m_lNotifyData = new ArrayList();
				m_fDisposed = false;
				m_fItemsAdded = false;
			}
			catch
			{
				//try-fault
				((IDisposable)this).Dispose();
				throw;
			}
		}

		private void _007EVirtualDatabaseList()
		{
			m_fDisposed = true;
		}

		public virtual void ListInsert(int index)
		{
			if (m_fInBulkEvents)
			{
				ListNotifyData listNotifyData = new ListNotifyData();
				listNotifyData.type = 0;
				listNotifyData.pos = index;
				m_lNotifyData.Add(listNotifyData);
			}
			else
			{
				Application.DeferredInvoke(DeferredInsert, index);
			}
		}

		public virtual void ListRemoveAt(int index)
		{
			if (m_fInBulkEvents)
			{
				ListNotifyData listNotifyData = new ListNotifyData();
				listNotifyData.type = 1;
				listNotifyData.pos = index;
				m_lNotifyData.Add(listNotifyData);
			}
			else
			{
				Application.DeferredInvoke(DeferredRemoveAt, index);
			}
		}

		public virtual void ListModified(int index)
		{
			if (m_fInBulkEvents)
			{
				ListNotifyData listNotifyData = new ListNotifyData();
				listNotifyData.type = 2;
				listNotifyData.pos = index;
				m_lNotifyData.Add(listNotifyData);
			}
			else
			{
				Application.DeferredInvoke(DeferredModified, index);
			}
		}

		public virtual void ListBeginBulkEvents()
		{
			m_fInBulkEvents = true;
		}

		public virtual void ListEndBulkEvents()
		{
			m_fInBulkEvents = false;
			m_fItemsAdded = false;
			Application.DeferredInvoke(DeferredEndBulkEvents, null);
		}

		public virtual void ListNotifyCount(uint count)
		{
			Application.DeferredInvoke(DeferredCountChange, (int)count);
		}

		public void SetBlockChangesFlag(int flag, [MarshalAs(UnmanagedType.U1)] bool block)
		{
			if (block)
			{
				m_blockChangesFlags |= flag;
			}
			else
			{
				m_blockChangesFlags &= ~flag;
			}
			byte blockChanges = (byte)((m_blockChangesFlags != 0) ? 1 : 0);
			BlockListChanges(blockChanges != 0);
		}

		public int GetQueryRN()
		{
			return m_QueryRN;
		}

		protected virtual void InvalidateItem(int index)
		{
			Modified(index);
		}

		private unsafe void DeferredEndBulkEvents(object P_0)
		{
			//IL_0062: Expected I, but got I8
			//IL_00f8: Expected I, but got I8
			if (m_fDisposed)
			{
				m_lNotifyData.Clear();
				return;
			}
			if (m_fBlockChanges)
			{
				m_fEndBulkArrivedDuringBlock = true;
				return;
			}
			if (m_fItemsAdded)
			{
				m_lNotifyData.Clear();
				m_pQueryList.EndBulkEventsComplete(fAbandon: true);
				m_fItemsAdded = false;
				return;
			}
			bool flag = false;
            ZuneDBApi.Module.PERFTRACE_COLLECTIONEVENT((_COLLECTION_EVENT)14, null);
			foreach (ListNotifyData lNotifyDatum in m_lNotifyData)
			{
				if (!m_fDisposed)
				{
					switch (lNotifyDatum.type)
					{
					case 2:
						DeferredModified(lNotifyDatum.pos);
						break;
					case 1:
						DeferredRemoveAt(lNotifyDatum.pos);
						flag = true;
						break;
					case 0:
						DeferredInsert(lNotifyDatum.pos);
						flag = true;
						break;
					}
					continue;
				}
				break;
			}
            ZuneDBApi.Module.PERFTRACE_COLLECTIONEVENT((_COLLECTION_EVENT)15, null);
			m_lNotifyData.Clear();
			m_pQueryList.EndBulkEventsComplete(fAbandon: false);
			if (flag)
			{
				m_QueryRN++;
			}
		}

		private void DeferredInsert(object args)
		{
			if (!m_fDisposed && Count > (int)args)
			{
				Insert((int)args);
			}
		}

		private void DeferredRemoveAt(object args)
		{
			if (!m_fDisposed && Count > 0 && Count > (int)args)
			{
				RemoveAt((int)args);
			}
		}

		private void DeferredModified(object args)
		{
			if (!m_fDisposed && Count > (int)args && IsItemAvailable((int)args))
			{
				InvalidateItem((int)args);
			}
		}

		private void DeferredCountChange(object args)
		{
			int num = (int)args;
			if (!m_fDisposed)
			{
				if (num > Count)
				{
					AddRange(num - Count);
				}
				else
				{
                    Count = num;
				}
			}
		}

		private void BlockListChanges([MarshalAs(UnmanagedType.U1)] bool blockChanges)
		{
			if (m_fBlockChanges != blockChanges)
			{
				m_fBlockChanges = blockChanges;
				if (!blockChanges && m_fEndBulkArrivedDuringBlock)
				{
					DeferredEndBulkEvents(null);
					m_fEndBulkArrivedDuringBlock = false;
				}
				m_pQueryList.ClientBusy(blockChanges);
			}
		}

		protected virtual void Dispose([MarshalAs(UnmanagedType.U1)] bool P_0)
		{
			if (P_0)
			{
				try
				{
					_007EVirtualDatabaseList();
				}
				finally
				{
					base.Dispose();
				}
			}
		}

		public new void Dispose()
		{
			Dispose(true);
		}
	}
}