private void timer1_Tick(object sender, EventArgs e)
{
lock (timer1)
{
if (resultQueue != null)
{
foreach (ResultItem item in resultQueue)
{
ListViewItem listItem = new ListViewItem();
listItem.Text = item.filename;
DeltaInfo deltaInfo = DeltaInfo.Construct(item.before, item.after);
if (deltaInfo != null)
{
if (deltaInfo.EndPosBefore - deltaInfo.StartPos > 0 &&
deltaInfo.EndPosAfter - deltaInfo.StartPos > 0)
{
listItem.SubItems.Add(item.before.Substring(deltaInfo.StartPos, deltaInfo.EndPosBefore - deltaInfo.StartPos).Trim());
listItem.SubItems.Add(item.after.Substring(deltaInfo.StartPos, deltaInfo.EndPosAfter - deltaInfo.StartPos).Trim());
occurrences += this.countDeltas(item.before, item.after);
}
else
{
listItem.Text = "ERROR" + listItem.Text;
}
Result.Items.Add(listItem);
}
}
}
resultQueue = null;
}
if (endSignalReceived)
{
StatusText.Text = "Done";
Go.Text = "Go";
timer1.Stop();
}
else
{
if (currentlyScanning != "")
{
StatusText.Text = currentlyScanning.Substring(Path.Text.Length);
}
else
{
StatusText.Text = "Preparing...";
}
}
ProgressText.Text = String.Format("{0} scanned; {1} found in {2} files. ", scanned, occurrences, Result.Items.Count);
}
private int countDeltas(string before, string after)
{
DeltaInfo deltaInfo = DeltaInfo.Construct(before, after);
int deltas = 0;
while (deltaInfo != null &&
deltaInfo.StartPos != deltaInfo.EndPosAfter &&
deltaInfo.StartPos != deltaInfo.EndPosBefore)
{
deltas++;
before = before.Remove(deltaInfo.StartPos, deltaInfo.EndPosBefore - deltaInfo.StartPos);
after = after.Remove(deltaInfo.StartPos, deltaInfo.EndPosAfter - deltaInfo.StartPos);
deltaInfo = DeltaInfo.Construct(before, after);
}
return(deltas);
}
public static DeltaInfo Construct(string before, string after)
{
if (before == after)
{
return(null);
}
char[] beforeArray = before.ToCharArray();
char[] afterArray = after.ToCharArray();
bool deltaFound = false;
int startPos = 0;
int endPosBefore = 0;
int endPosAfter = 0;
int minLength = Math.Min(beforeArray.Length, afterArray.Length);
for (int pos = 0; pos < minLength; pos++)
{
if (!deltaFound && beforeArray[pos] != afterArray[pos])
{
deltaFound = true;
startPos = pos;
}
if (endPosBefore == 0 && deltaFound && (beforeArray[pos] == ';' || beforeArray[pos] == '\n'))
{
endPosBefore = pos;
}
if (endPosBefore == 0 && deltaFound && (beforeArray[pos] == '#'))
{
endPosBefore = pos - 11;
}
if (endPosAfter == 0 && deltaFound && (afterArray[pos] == ';' || afterArray[pos] == '\n'))
{
endPosAfter = pos;
}
if (endPosAfter == 0 && deltaFound && (afterArray[pos] == '#'))
{
endPosAfter = pos - 11;
}
if (endPosBefore != 0 && endPosAfter != 0)
{
break;
}
}
for (; startPos > 0; startPos--)
{
if (afterArray[startPos] == '#')
{
break;
}
}
startPos++;
endPosBefore++;
endPosAfter++;
DeltaInfo deltaInfo = new DeltaInfo();
deltaInfo.StartPos = startPos;
deltaInfo.EndPosAfter = endPosAfter;
deltaInfo.EndPosBefore = endPosBefore;
return(deltaInfo);
}