private void FixOnPreviewTextInput(TextCompositionEventArgs e)
{
var index = this.CaretOffset;
var input = e.Text;
var prev = this.PreviousChar.ToString();
var next = this.NextChar.ToString();
e.Handled = false;
switch (input)
{
case "'":
case "\"":
if (this.IsSelectedSingleLine ||
(this.IsSelectedMultiLine && this.ExtendedOptions.EncloseMultiLine))
{
if (this.ExtendedOptions.EncloseSelection)
{
e.Handled = true;
this.BeginChange();
this.Document.Insert(this.SelectionStart, input);
this.Document.Insert(this.SelectionStart + this.SelectionLength, input);
this.EndChange();
}
break;
}
if (this.IsSelectedMultiLine && !this.ExtendedOptions.EncloseMultiLine)
{
break;
}
if (next == input &&
prev == input)
{
e.Handled = true;
this.CaretOffset++;
break;
}
if (this.ExtendedOptions.BracketCompletion &&
("\t\r\n \0".Contains(next) ||
("({[".Contains(prev) && "]})".Contains(next))))
{
e.Handled = true;
this.Document.Insert(index, input + input);
if (this.IsSelectedMultiLine)
{
this.CaretOffset++;
}
else
{
this.CaretOffset--;
}
break;
}
break;
case "(":
case "{":
case "[":
var closeBracket = StringChecker.GetCloseBracket(input).ToString();
if (this.IsSelectedSingleLine ||
(this.IsSelectedMultiLine && this.ExtendedOptions.EncloseMultiLine))
{
if (this.ExtendedOptions.EncloseSelection)
{
e.Handled = true;
this.BeginChange();
this.Document.Insert(this.SelectionStart, input);
this.Document.Insert(this.SelectionStart + this.SelectionLength, closeBracket);
this.EndChange();
}
break;
}
if (this.IsSelectedMultiLine && !this.ExtendedOptions.EncloseMultiLine)
{
break;
}
if (this.ExtendedOptions.BracketCompletion &&
("\t\r\n \0".Contains(next) ||
("({[".Contains(prev) && "]})".Contains(next))))
{
e.Handled = true;
this.Document.Insert(index, input + closeBracket);
if (this.IsSelectedMultiLine)
{
this.CaretOffset++;
}
else
{
this.CaretOffset--;
}
break;
}
break;
case ")":
case "}":
case "]":
if (next == input &&
prev == StringChecker.GetOpenBracket(input).ToString())
{
e.Handled = true;
this.CaretOffset++;
break;
}
break;
default:
break;
}
}
