Avalonia 實現聊天訊息渲染、圖文混排（支援Windows、Linux、信創國產OS）

   　　　/// <summary>
        /// 渲染名片 
        /// </summary>
        /// <param name="msgID">聊天記錄ID</param>
        /// <param name="userID">傳送者</param>
        /// <param name="cardUserID">名片上的個人ID</param>
        /// <param name="index">插入聊天記錄的位置，預設是放到最後面</param>
        void AddChatItemCard(string msgID ,string userID, string cardUserID ,int? index = null);

        /// <summary>
        /// 渲染檔案 
        /// </summary> 
        /// <param name="fileName">檔名稱</param>
        /// <param name="fileSize">檔案大小</param>
        /// <param name="state">檔案狀態</param> 
        void AddChatItemFile(string msgID, string userID, string fileName, ulong fileSize, FileTransState state, int? index = null);

        /// <summary>
        /// 渲染圖片
        /// </summary> 
        /// <param name="image">影象</param>
        /// <param name="imgSize">影象大小</param>
        /// <param name="observerable">預設傳null</param> 
        void AddChatItemImage(string msgID, string userID, object image, Size imgSize ,IProgressObserverable observerable = null, int? index = null);

        /// <summary>
        /// 渲染文字表情
        /// </summary> 
        /// <param name="text">內容，在渲染文字的內容中用 [000]來代表第一個表情，[001]即是二個表情，以此類推</param>
        /// <param name="referenced">參照內容可以是文字、圖片、檔案或名片</param>
        /// <param name="textColor">文字顏色</param> 
        void AddChatItemText(string msgID, string userID, string text, ReferencedChatMessage referenced = null, Color? textColor = null, int? index = null);

        /// <summary>
        /// 渲染悄悄話，預設顯示內容—>> 悄悄話
        /// </summary> 
        void AddChatItemSnap(string msgID, string userID, int? index = null);

        /// <summary>
        /// 渲染語音訊息
        /// </summary> 
        /// <param name="audioMessageSecs">語音時長</param>
        /// <param name="audioMessage">語音簡訊</param> 
        void AddChatItemAudio(string msgID, string userID, int audioMessageSecs, object audioMessage, int? index = null);

        /// <summary>
        /// 渲染多媒體通話型別
        /// </summary> 
        /// <param name="duration">通話時長</param>
        /// <param name="isAudioCommunicate">通話型別(語音/視訊)</param> 
        void AddChatItemMedia(string msgID, string userID, string duration, bool isAudioCommunicate, int? index = null); 

        /// <summary>
        /// 渲染系統訊息
        /// </summary>
        /// <param name="msg">系統訊息內容</param> 
        void AddChatItemSystemMessage(string msg, int? index = null);

        /// <summary>
        /// 渲染訊息的傳送時間
        /// </summary>
        /// <param name="dt">傳送時間</param> 
        void AddChatItemTime(DateTime dt, int? index = null);   

        /// <summary>
        /// 自己撤回訊息 
        /// </summary> 
        void RecallChatMessage(string msgID);

        /// <summary>
        /// 其他使用者撤回訊息 
        /// </summary> 
        /// <param name="operatorName">操作者</param>
        void RecallChatMessage(string msgID ,string operatorName);

        /// <summary>
        /// 刪除對應的記錄
        /// </summary> 
        void RemoveChatMessage(string msgID);

        /// <param name="provider">提供必要的資訊給聊天渲染器</param>
        /// <param name="ctrl">要在其表面渲染的UI控制元件</param>
        /// <param name="myID">自己的ID</param>
        /// <param name="destID">對方ID、或群ID</param>
        /// <param name="isGroup">群聊/單聊</param>
        /// <returns></returns>
        public static IChatRender CreateChatRender(ISysRender sysRender,IRenderDataProvider provider, IChatControl ctrl, string myID, string destID, bool isGroup);       

        /// <summary>
        /// 插入要渲染的自定義訊息。
        /// </summary>       
        void AddChatItemCustomized(IChatItem item, int? index = null);