Untiy：Text文本超长的时候省略展示

逃离我推掉我的手 2024-04-20 12:21 2阅读 0赞

public static class TextExtension
    {
        
        /// <summary>
        /// 设置文本长度
        /// </summary>
        /// <param name="text"></param>
        /// <param name="maxWidth"></param>
        /// <param name="input">输入框</param>
        /// <param name="suffix"></param>
        public static void SetTextWithEllipsis(this Text text, int maxWidth, InputField input = null, string suffix = "...")
        {
        
            int textLeng = GetTextLeng(text);
    
            if (textLeng > maxWidth)
            {
        
                int suffixLeng = GetTextLeng(text, suffix);
                if(input == null)
                {
        
                    text.text = StripLength(text, maxWidth - suffixLeng) + suffix;
                }
                else
                {
        
                    input.text = StripLength(text, maxWidth - suffixLeng) + suffix;
                }
            }
            else
            {
        
                return;
            }
        }
    
        /// <summary>
        /// 中间添加省略号
        /// </summary>
        /// <param name="text"></param>
        /// <param name="maxWidth"></param>
        /// <param name="suffix"></param>
        public static void SetTextWithMiddle(this Text text, int maxWidth, string suffix = "...")
        {
        
            int textLeng = GetTextLeng(text);
    
            if (textLeng > maxWidth)
            {
        
                int suffixLeng = GetTextLeng(text, suffix);
                int middle = Mathf.Abs((maxWidth - suffixLeng)/2);
                string startStr = StripLength(text, middle);
                string endStr = StripEndLength(text, middle);
                text.text = startStr + suffix + endStr;
            }
            else
            {
        
                return;
            }
        }
    
        /// <summary>
        /// 按照指定宽度截断字符串
        /// </summary>
        /// <param name="text"></param>
        /// <param name="width"></param>
        /// <returns></returns>
        private static string StripLength(Text text, int width)
        {
        
            int totalLength = 0;
            Font myFont = text.font;
            myFont.RequestCharactersInTexture(text.text, text.fontSize, text.fontStyle);
            CharacterInfo characterInfo = new CharacterInfo();
    
            char[] charArr = text.text.ToCharArray();
    
            int i = 0;
            for (; i < charArr.Length; i++)
            {
        
                myFont.GetCharacterInfo(charArr[i], out characterInfo, text.fontSize);
    
                int newLength = totalLength + characterInfo.advance;
                if (newLength > width)
                {
        
                    if (Mathf.Abs(newLength - width) > Mathf.Abs(width - totalLength))
                    {
        
                        break;
                    }
                    else
                    {
        
                        totalLength = newLength;
                        break;
                    }
                }
                totalLength += characterInfo.advance;
            }
            return text.text.Substring(0, i);
        }
    
        /// <summary>
        /// 按照指定宽度截断字符串
        /// </summary>
        /// <param name="text"></param>
        /// <param name="width"></param>
        /// <returns></returns>
        private static string StripEndLength(Text text, int width)
        {
        
            int totalLength = 0;
            Font myFont = text.font;
            myFont.RequestCharactersInTexture(text.text, text.fontSize, text.fontStyle);
            CharacterInfo characterInfo = new CharacterInfo();
    
            char[] charArr = text.text.ToCharArray();
    
            int i = 0;
            for (i = charArr.Length -1; i >= 0; i--)
            {
        
                myFont.GetCharacterInfo(charArr[i], out characterInfo, text.fontSize);
    
                int newLength = totalLength + characterInfo.advance;
                if (newLength > width)
                {
        
                    if (Mathf.Abs(newLength - width) > Mathf.Abs(width - totalLength))
                    {
        
                        break;
                    }
                    else
                    {
        
                        totalLength = newLength;
                        break;
                    }
                }
                totalLength += characterInfo.advance;
            }
            return text.text.Remove(0,i);
        }
    
        /// <summary>
        /// 获取字符串在text中的长度
        /// </summary>
        /// <param name="text"></param>
        /// <param name="str"></param>
        /// <returns></returns>
        public static int GetTextLeng(this Text text, string str = null)
        {
        
            Font mFont = text.font;
            string mStr = string.IsNullOrEmpty(str) ? text.text : str;
            mFont.RequestCharactersInTexture(mStr, text.fontSize, text.fontStyle);
            char[] charArr = mStr.ToCharArray();
            int totalTextLeng = 0;
            CharacterInfo character = new CharacterInfo();
            for (int i = 0; i < charArr.Length; i++)
            {
        
                mFont.GetCharacterInfo(charArr[i], out character, text.fontSize);
                totalTextLeng += character.advance;
            }
            return totalTextLeng;
        }
    
        /// <summary>
        /// 文本长度是否超出
        /// </summary>
        /// <param name="text"></param>
        /// <param name="str"></param>
        /// <returns></returns>
        public static bool OutLength(this Text text, int maxWidth)
        {
        
            int textLeng = GetTextLeng(text);
    
            if (textLeng > maxWidth)
            {
        
                return true;
            }
            return false;
        }
    
    }