private void textBoxNew_TextChanged(object sender, EventArgs e)
{
string s = this.textBoxOriginal.Text, t = ScriptCorrector.RemoveHTML(this.textBoxNew.Text);
List <string> diff = Diff(s, t);
this.richTextBoxCompare.Text = "";
foreach (string d in diff)
{
string action = d.Substring(0, 1);
string text = d.Substring(1);
Color color = Color.Black;
if (action == "+")
{
color = Color.DarkGreen;
}
else if (action == "-")
{
color = Color.DarkRed;
}
AppendText(text, color, color != Color.Black);
}
this.richTextBoxCompare.BackColor = (s == t) ? SystemColors.ControlLight : SystemColors.Control;
this.buttonOk.Text = (originalText == this.textBoxNew.Text) ? "Next" : "OK";
}
internal static List <string> Diff(string s, string t)
{
int[,] d;
ScriptCorrector.StringEditDistance(s, t, out d);
List <string> list = new List <string>();
string current = "";
string currentOp = "=";
int i = d.GetLength(0) - 1, j = d.GetLength(1) - 1;
while (i > 0 && j > 0)
{
int del = d[i - 1, j], ins = d[i, j - 1], same = d[i - 1, j - 1];
if (s[i - 1] != t[j - 1])
{
same += 1000;
}
if (currentOp == "=" && same <= ins && same <= del)
{
i--; j--;
if (s[i] != t[j])
{
}
current = s[i] + current;
continue;
}
if (currentOp == "+" && ins <= same && ins <= del)
{
j--;
current = t[j] + current;
continue;
}
if (currentOp == "-" && del <= ins && del <= same)
{
i--;
current = s[i] + current;
continue;
}
if (current.Length > 0)
{
list.Insert(0, currentOp + current);
current = "";
}
if (same <= del && same <= ins)
{
i--; j--;
currentOp = "=";
if (s[i] != t[j])
{
}
current = s[i] + current;
continue;
}
if (ins <= del && ins <= same)
{
j--;
currentOp = "+";
current = t[j] + current;
continue;
}
i--;
currentOp = "-";
current = s[i] + current;
continue;
}
while (i > 0)
{
if (currentOp != "-")
{
list.Insert(0, currentOp + current);
current = "";
currentOp = "-";
}
current = s[--i] + current;
}
while (j > 0)
{
if (currentOp != "+")
{
list.Insert(0, currentOp + current);
current = "";
currentOp = "+";
}
current = t[--j] + current;
}
if (current.Length > 0)
{
list.Insert(0, currentOp + current);
}
return(list);
}