propertieschangedeventargs.cs

来自「破解的飞信源代码」· CS 代码 · 共 164 行

namespace Imps.Client.Core
{
    using System;
    using System.Collections.Generic;
    using System.Reflection;

    public class PropertiesChangedEventArgs : EventArgs
    {
        private IDictionary<string, object> _changedContext;
        private IList<string> _changedProperties;
        private object _syncRoot;

        public PropertiesChangedEventArgs()
        {
            this._changedProperties = new List<string>();
            this._syncRoot = this._changedProperties;
        }

        public PropertiesChangedEventArgs(IEnumerable<string> changedProperties)
        {
            this._changedProperties = new List<string>(changedProperties);
            this._syncRoot = this._changedProperties;
        }

        public void AddChangedProperty<T>(string name, ChangedValuePair<T> context)
        {
            lock (this._syncRoot)
            {
                if (!this._changedProperties.Contains(name))
                {
                    this._changedProperties.Add(name);
                }
                if (context != null)
                {
                    if (this._changedContext == null)
                    {
                        this._changedContext = new Dictionary<string, object>();
                    }
                    if (this._changedContext.ContainsKey(name))
                    {
                        ChangedValuePair<T> pair = this._changedContext.get_Item(name) as ChangedValuePair<T>;
                        this._changedContext.Remove(name);
                        if (pair != null)
                        {
                            if (object.Equals(pair.OldValue, context.NewValue))
                            {
                                this._changedProperties.Remove(name);
                                goto Label_00C7;
                            }
                            context = new ChangedValuePair<T>(pair.OldValue, context.NewValue);
                        }
                    }
                    this._changedContext.Add(name, context);
                Label_00C7:;
                }
            }
        }

        public bool ContainsAllOfProperties(params string[] names)
        {
            lock (this._syncRoot)
            {
                for (int i = 0; i < names.Length; i++)
                {
                    if (!this._changedProperties.Contains(names[i]))
                    {
                        return false;
                    }
                }
                return true;
            }
        }

        public bool ContainsAnyOfProperties(params string[] names)
        {
            lock (this._syncRoot)
            {
                for (int i = 0; i < names.Length; i++)
                {
                    if (this._changedProperties.Contains(names[i]))
                    {
                        return true;
                    }
                }
                return false;
            }
        }

        public bool ContainsProperty(string name)
        {
            lock (this._syncRoot)
            {
                return this._changedProperties.Contains(name);
            }
        }

        public IEnumerator<string> GetEnumerator()
        {
            lock (this._syncRoot)
            {
                return this._changedProperties.GetEnumerator();
            }
        }

        public void RemoveChangedProperty(string name)
        {
            lock (this._syncRoot)
            {
                this._changedProperties.Remove(name);
                if (this._changedContext != null)
                {
                    this._changedContext.Remove(name);
                }
            }
        }

        public int Count
        {
            get
            {
                lock (this._syncRoot)
                {
                    return this._changedProperties.get_Count();
                }
            }
        }

        public object this[string name]
        {
            get
            {
                lock (this._syncRoot)
                {
                    if (this._changedContext == null)
                    {
                        return null;
                    }
                    return this._changedContext.get_Item(name);
                }
            }
        }

        public string this[int index]
        {
            get
            {
                lock (this._syncRoot)
                {
                    return this._changedProperties.get_Item(index);
                }
            }
        }

        public object SyncRoot
        {
            get
            {
                return this._syncRoot;
            }
        }
    }
}