/// <summary>
        /// 将表情对话框中的表情转换为富文本中的表情
        /// </summary>
        /// <param name="face"></param>
        /// <returns></returns>
        public EmojiModel FaceToEmoji(EmojiModel face)
        {
            if (face.Size == EmojiSize.Small)
            {
                return(null);
            }

            EmojiModel model = null;

            if (face.Type == EmojiType.Emoji)
            {
                if (EmojiMap.TryGetValue(face.Code, out string code))
                {
                    model = EmojiModelList.FirstOrDefault(p => p.Code == code);
                }
            }
            else
            {
                if (QQEmojiMap.TryGetValue(face.Code, out int index))
                {
                    if (QQEmojiModelList.Count > index)
                    {
                        model = QQEmojiModelList[index];
                    }
                }
            }
            return(model);
        }
        static EmojiManager()
        {
            if (!Directory.Exists("Emoji"))
            {
                return;
            }
            string emojiMapJson = File.ReadAllText("Emoji/emoji_map.json");

            EmojiMap = JsonConvert.DeserializeObject <Dictionary <string, string> >(emojiMapJson);

            string qqEmojiMapJson = File.ReadAllText("Emoji/qq_emoji_map.json");

            QQEmojiMap = JsonConvert.DeserializeObject <Dictionary <string, int> >(qqEmojiMapJson);

            string emojiModelJson = File.ReadAllText("Emoji/emoji.json");

            EmojiModelList = JsonConvert.DeserializeObject <List <EmojiModel> >(emojiModelJson);
            EmojiModelList.ForEach(p =>
            {
                p.Type = EmojiType.Emoji;
                p.Size = EmojiSize.Small;
            });

            string qqEmojiModelJson = File.ReadAllText("Emoji/qq_emoji.json");

            QQEmojiModelList = JsonConvert.DeserializeObject <List <EmojiModel> >(qqEmojiModelJson);
            QQEmojiModelList.ForEach(p =>
            {
                p.Type = EmojiType.QQ;
                p.Size = EmojiSize.Small;
            });

            string emojiCodeMapJson = File.ReadAllText("Emoji/emoji_code_map.json");

            EmojiCodeMap = JsonConvert.DeserializeObject <Dictionary <string, string> >(emojiCodeMapJson);
        }