public override void Undo()
{
var tb = TextSource.CurrentTextBox;
TextSource.OnTextChanging();
tb.Selection.BeginUpdate();
for (var i = 0; i < _iLines.Count; i++)
{
var iLine = _iLines[i];
tb.Selection.Start = iLine < TextSource.Count ? new Place(0, iLine) : new Place(TextSource[TextSource.Count - 1].Count, TextSource.Count - 1);
InsertCharCommand.InsertLine(TextSource);
tb.Selection.Start = new Place(0, iLine);
var text = _prevText[_prevText.Count - i - 1];
InsertTextCommand.InsertText(text, TextSource);
TextSource[iLine].IsChanged = true;
if (iLine < TextSource.Count - 1)
{
TextSource[iLine + 1].IsChanged = true;
}
else
{
TextSource[iLine - 1].IsChanged = true;
}
if (text.Trim() != string.Empty)
{
TextSource.OnTextChanged(iLine, iLine);
}
}
tb.Selection.EndUpdate();
TextSource.NeedRecalc(new TextSource.TextChangedEventArgs(0, 1));
}
internal static void ClearSelected(TextSource ts)
{
var tb = ts.CurrentTextBox;
var start = tb.Selection.Start;
var end = tb.Selection.End;
var fromLine = Math.Min(end.Line, start.Line);
var toLine = Math.Max(end.Line, start.Line);
var fromChar = tb.Selection.FromX;
var toChar = tb.Selection.ToX;
if (fromLine < 0)
{
return;
}
if (fromLine == toLine)
{
ts[fromLine].RemoveRange(fromChar, toChar - fromChar);
}
else
{
ts[fromLine].RemoveRange(fromChar, ts[fromLine].Count - fromChar);
ts[toLine].RemoveRange(0, toChar);
ts.RemoveLine(fromLine + 1, toLine - fromLine - 1);
InsertCharCommand.MergeLines(fromLine, ts);
}
tb.Selection.Start = new Place(fromChar, fromLine);
ts.NeedRecalc(new TextSource.TextChangedEventArgs(fromLine, toLine));
}
internal static void InsertText(string insertedText, TextSource ts)
{
var tb = ts.CurrentTextBox;
try
{
tb.Selection.BeginUpdate();
var cc = '\x0';
if (ts.Count == 0)
{
InsertCharCommand.InsertLine(ts);
tb.Selection.Start = Place.Empty;
}
tb.ExpandBlock(tb.Selection.Start.Line);
var len = insertedText.Length;
for (var i = 0; i < len; i++)
{
var c = insertedText[i];
if (c == '\r' && (i >= len - 1 || insertedText[i + 1] != '\n'))
{
InsertCharCommand.InsertChar('\n', ref cc, ts);
}
else
{
InsertCharCommand.InsertChar(c, ref cc, ts);
}
}
ts.NeedRecalc(new TextSource.TextChangedEventArgs(0, 1));
}
finally
{
tb.Selection.EndUpdate();
}
}
