/// <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();
if (textA.Length <= textB.Length) {
diff.SplitHash(textA, textB, option);
}
else {
diff.isSwap = true;
diff.SplitHash(textB, textA, option);
}
return diff.DetectDiff();
}
/// <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>
/// <returns>比較結果</returns>
public static DiffResult[] Diff(string textA, string textB)
{
DiffOption option = new DiffOption();
return Diff(textA, textB, option);
}
private static int[] SplitHash(string text, DiffOption option)
{
if (option.IgnoreCase)
text = text.ToUpperInvariant();
string[] lines = text.Split('\n');
// 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();
int[] hashs = new int[lines.Length];
for (int i = 0; i < lines.Length; ++i)
hashs[i] = lines[i].GetHashCode();
return hashs;
}
private void SplitHash(string textA, string textB, DiffOption option)
{
if (option.TrimSpace || option.IgnoreSpace) {
this.dataA = SplitHash(textA, option);
this.dataB = SplitHash(textB, option);
}
else {
this.dataA = SplitHash(textA, option.IgnoreCase);
this.dataB = SplitHash(textB, option.IgnoreCase);
}
}
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;
}
private void SplitChar(string textA, string textB, DiffOption option)
{
this.dataA = SplitChar(textA, option);
this.dataB = SplitChar(textB, option);
}