public Brush MapDiffState(DiffData.DiffState state) // Diff 상태를 그에 대응하는 색으로 변환
{
switch (state)
{
case DiffData.DiffState.Equal:
return(correctBackground);
case DiffData.DiffState.Unequal:
return(incorrectBackground);
case DiffData.DiffState.Intermediate:
return(intermidiateBackground);
default:
throw new ArgumentOutOfRangeException();
}
}
// text1, text2의 차이(Diff)를 구한다. 불일치하는 글자가 있을 경우 text1의 글자를 사용하여 불일치를 표현
public IEnumerable <DiffData> Diff(string text1, string text2, string originalText1 /* text1의 잘리지 않은 원본, 도깨비불 확인용 */)
{
if (string.IsNullOrEmpty(text1) || string.IsNullOrEmpty(text2))
{
return(new List <DiffData>());
}
int length = Math.Min(text1.Length, text2.Length), i = 0;
var result = new List <DiffData>();
DiffData.DiffState currentState = DiffData.DiffState.Unequal;
string tempString = "";
for (; i < length; i++)
{
char ch1 = text1[i], ch2 = text2[i];
DiffData.DiffState state = ch1 == ch2 ? DiffData.DiffState.Equal : DiffData.DiffState.Unequal;
if (i == length - 1)
{
var decomposed1 = new List <char>(DecomposeHangul(ch1));
var decomposed2 = new List <char>(DecomposeHangul(ch2));
if (decomposed1.Any() && decomposed2.Any()) // ch1, ch2 둘 다 한글
{
if (decomposed1.SequenceEqual(decomposed2))
{
state = DiffData.DiffState.Equal;
}
else if (decomposed1.Count < decomposed2.Count &&
i < originalText1.Length - 1 && // 다음 글자가 존재함
decomposed1.SequenceEqual(decomposed2.Take(decomposed1.Count)) && // 부분 일치
decomposed2.Count >= 3) // decomposed2 는 종성이 있어야 함
{ // 도깨비불 현상 가능성
var nextDecomposed = new List <char>(DecomposeHangul(originalText1[i + 1]));
state = nextDecomposed.Any() && (decomposed2.Last() == nextDecomposed.First())
? DiffData.DiffState.Equal
: DiffData.DiffState.Unequal;
}
else
{
state = decomposed2.SequenceEqual(decomposed1.Take(decomposed2.Count))
? DiffData.DiffState.Intermediate
: DiffData.DiffState.Unequal;
}
}
}
if (i == 0)
{
currentState = state;
}
if (state == currentState)
{
tempString += ch1;
}
else
{
result.Add(new DiffData(tempString, currentState));
currentState = state;
tempString = ch1.ToString();
}
}
if (tempString != "")
{
result.Add(new DiffData(tempString, currentState));
}
if (text1.Length == text2.Length)
{
return(result);
}
result.Add(new DiffData((text1.Length < text2.Length ? text2 : text1).Substring(i),
DiffData.DiffState.Unequal));
return(result);
}
