/// <summary>
/// Undo operation
/// </summary>
public override void Undo()
{
var tb = ts.CurrentTB;
ts.OnTextChanging();
tb.Selection.BeginUpdate();
//tb.BeginUpdate();
for (int i = 0; i < iLines.Count; i++)
{
var iLine = iLines[i];
if (iLine < ts.Count)
{
tb.Selection.Start = new Place(0, iLine);
}
else
{
tb.Selection.Start = new Place(ts[ts.Count - 1].Count, ts.Count - 1);
}
InsertCharCommand.InsertLine(ts);
tb.Selection.Start = new Place(0, iLine);
var text = prevText[prevText.Count - i - 1];
InsertTextCommand.InsertText(text, ts);
ts[iLine].IsChanged = true;
if (iLine < ts.Count - 1)
{
ts[iLine + 1].IsChanged = true;
}
else
{
ts[iLine - 1].IsChanged = true;
}
if (text.Trim() != string.Empty)
{
ts.OnTextChanged(iLine, iLine);
}
}
//tb.EndUpdate();
tb.Selection.EndUpdate();
ts.NeedRecalc(new TextSource.TextChangedEventArgs(0, 1));
}
internal static void InsertText(string insertedText, TextSource ts)
{
var tb = ts.CurrentTB;
try {
tb.Selection.BeginUpdate();
char cc = '\x0';
if (ts.Count == 0)
{
InsertCharCommand.InsertLine(ts);
}
tb.ExpandBlock(tb.Selection.Start.iLine);
foreach (char c in insertedText)
{
InsertCharCommand.InsertChar(c, ref cc, ts);
}
ts.NeedRecalc(new TextSource.TextChangedEventArgs(0, 1));
} finally {
tb.Selection.EndUpdate();
}
}