/// <summary>
///
/// </summary>
/// <param name="text"></param>
/// <param name="option"></param>
/// <returns></returns>
private static int[] SplitChar(string text, DiffOption option)
{
if (option.IgnoreCase)
text = text.ToUpperInvariant();
// TODO: FIXME! Optimize this
if (option.IgnoreSpace)
text = Regex.Replace(text, @"\s+", " ");
if (option.TrimSpace)
text = text.Trim();
int[] result = new int[text.Length];
for (int i = 0; i < text.Length; i++)
result[i] = text[i];
return result;
}
/// <summary>
///
/// </summary>
/// <param name="text"></param>
/// <param name="option"></param>
/// <returns></returns>
private static string[] SplitLine(string text, DiffOption option)
{
if (option.IgnoreCase)
text = text.ToUpperInvariant();
string[] lines = text.Split(new string[] { "\r\n", "\n", "\r" }, StringSplitOptions.None);
// TODO: FIXME! Optimize this
if (option.IgnoreSpace)
for (int i = 0; i < lines.Length; ++i)
lines[i] = Regex.Replace(lines[i], @"\s+", " ");
if (option.TrimSpace)
for (int i = 0; i < lines.Length; ++i)
lines[i] = lines[i].Trim();
return lines;
}
/// <summary>
///
/// </summary>
/// <param name="textA"></param>
/// <param name="textB"></param>
/// <param name="option"></param>
private void SplitChar(string textA, string textB, DiffOption option)
{
this.dataA = SplitChar(textA, option);
this.dataB = SplitChar(textB, option);
}
/// <summary>
///
/// </summary>
/// <param name="textA"></param>
/// <param name="textB"></param>
/// <param name="option"></param>
/// <returns></returns>
private DiffResult[] DiffCore(string textA, string textB, DiffOption option)
{
this.linesA = SplitLine(textA, option);
this.linesB = SplitLine(textB, option);
if (this.linesB.Length < this.linesA.Length)
{
this.isSwap = true;
string[] tmps = this.linesA;
this.linesA = this.linesB;
this.linesB = tmps;
}
this.dataA = MakeHash(this.linesA);
this.dataB = MakeHash(this.linesB);
this.isSame = delegate(int posA, int posB)
{
return (this.dataA[posA] == this.dataB[posB]) && (this.linesA[posA] == this.linesB[posB]);
};
return DetectDiff();
}
/// <summary>単一行の各文字を比較します</summary>
/// <param name="textA">元テキスト</param>
/// <param name="textB">変更テキスト</param>
/// <param name="option">オプション指定</param>
/// <returns>比較結果</returns>
public static DiffResult[] DiffChar(string textA, string textB, DiffOption option)
{
if (string.IsNullOrEmpty(textA) || string.IsNullOrEmpty(textB))
return StringNullOrEmpty(textA, textB);
FastDiff diff = new FastDiff();
if (textA.Length <= textB.Length)
{
diff.SplitChar(textA, textB, option);
}
else
{
diff.isSwap = true;
diff.SplitChar(textB, textA, option);
}
diff.isSame = delegate(int posA, int posB)
{
return diff.dataA[posA] == diff.dataB[posB];
};
return diff.DetectDiff();
}
/// <summary>単一行の各文字を比較します</summary>
/// <param name="textA">元テキスト</param>
/// <param name="textB">変更テキスト</param>
/// <returns>比較結果</returns>
public static DiffResult[] DiffChar(string textA, string textB)
{
DiffOption option = new DiffOption();
return DiffChar(textA, textB, option);
}
/// <summary>複数行の文字列を行単位で比較します</summary>
/// <param name="textA">元テキスト</param>
/// <param name="textB">変更テキスト</param>
/// <param name="option">オプション指定</param>
/// <returns>比較結果</returns>
public static DiffResult[] Diff(string textA, string textB, DiffOption option)
{
if (string.IsNullOrEmpty(textA) || string.IsNullOrEmpty(textB))
return StringNullOrEmpty(textA, textB);
FastDiff diff = new FastDiff();
return diff.DiffCore(textA, textB, option);
}
