AutoPatientInfoRecorder/src/AntdUI/Controls/Input/Input.Splitter.cs

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// COPYRIGHT (C) Tom. ALL RIGHTS RESERVED.
// THE AntdUI PROJECT IS AN WINFORM LIBRARY LICENSED UNDER THE Apache-2.0 License.
// LICENSED UNDER THE Apache License, VERSION 2.0 (THE "License")
// YOU MAY NOT USE THIS FILE EXCEPT IN COMPLIANCE WITH THE License.
// YOU MAY OBTAIN A COPY OF THE LICENSE AT
//
//     http://www.apache.org/licenses/LICENSE-2.0
//
// UNLESS REQUIRED BY APPLICABLE LAW OR AGREED TO IN WRITING, SOFTWARE
// DISTRIBUTED UNDER THE LICENSE IS DISTRIBUTED ON AN "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.
// SEE THE LICENSE FOR THE SPECIFIC LANGUAGE GOVERNING PERMISSIONS AND
// LIMITATIONS UNDER THE License.
// GITEE: https://gitee.com/antdui/AntdUI
// GITHUB: https://github.com/AntdUI/AntdUI
// CSDN: https://blog.csdn.net/v_132
// QQ: 17379620

using System;
using System.Collections.Generic;

namespace AntdUI
{
    public class GraphemeSplitter
    {
        #region BASE

        protected struct RangeInfo
        {
            public int Start;
            public int End;
            public int Type;
        }
        public static int Each(string strText, Func<string, int, int, bool> cb)
        {
            return Each(strText, 0, cb);
        }
        public static int Each(string strText, int nIndex, Func<string, int, int, bool> cb)
        {
            int nCounter = 0;
            List<int> lst_history_break_type = new List<int>();
            if (string.IsNullOrEmpty(strText) || nIndex >= strText.Length) return 0;
            int nIndexCharStart = 0, nCharLen = 0, nLastCharLen = 0;
            int nCodePoint = 0;
            int nLeftBreakType = 0, nRightBreakType = 0;

            while (nIndex < strText.Length && char.IsLowSurrogate(strText, nIndex))
            {
                nIndex++;
                nCharLen++;
            }
            if (nCharLen != 0)
            {
                nCounter++;
                if (!CharCompleted(strText, nIndex - nCharLen, nCharLen, cb)) return nCounter;
            }
            nIndexCharStart = nIndex;
            nCodePoint = GetCodePoint(strText, nIndex);
            nLastCharLen = nCodePoint >= 0x10000 ? 2 : 1;       // >= 0x10000 is double char
            nLeftBreakType = GetBreakProperty(nCodePoint);