public void FindEditPositionFrom()
{
var maskedTextProvider = new MaskedTextProvider(TestSimpleDigitMask);
Assert.Equal(0, maskedTextProvider.FindEditPositionFrom(0, true));
Assert.Equal(5, maskedTextProvider.FindEditPositionFrom(5, false));
}
int AdvanceToNextEditPosition(int position)
{
var newPos = Provider.FindEditPositionFrom(position, true);
if (newPos >= 0)
{
position = newPos;
}
return(position);
}
// Finds the next non-mask character.
private int SkipToEditableCharacter(int startPos)
{
int newPos = maskProvider.FindEditPositionFrom(startPos, true);
if (newPos == -1)
{
// Already at the end of the string.
return(startPos);
}
else
{
return(newPos);
}
}
private static bool CanReplace(MaskedTextProvider provider, string text, int startPosition, int selectionLength, bool rejectInputOnFirstFailure, out int tentativeCaretIndex)
{
var endPosition = startPosition + selectionLength - 1;
tentativeCaretIndex = -1;
var success = false;
foreach (var character in text)
{
if (!provider.VerifyEscapeChar(character, startPosition))
{
var editPositionFrom = provider.FindEditPositionFrom(startPosition, true);
if (editPositionFrom == MaskedTextProvider.InvalidIndex)
{
break;
}
startPosition = editPositionFrom;
}
var length = endPosition >= startPosition ? 1 : 0;
var overwrite = length > 0;
if (PlaceChar(provider, character, startPosition, length, overwrite, out tentativeCaretIndex))
{
// Only one successfully inserted character is enough to declare the replace operation successful.
success = true;
startPosition = tentativeCaretIndex + 1;
}
else if (rejectInputOnFirstFailure)
{
return(false);
}
}
if ((selectionLength > 0) && (startPosition <= endPosition))
{
// Erase the remaining of the assigned edit character.
int notUsed;
MaskedTextResultHint notUsedHint;
if (!provider.RemoveAt(startPosition, endPosition, out notUsed, out notUsedHint))
{
success = false;
}
}
return(success);
}
protected override void OnKeyPress(KeyPressEventArgs e)
{
if (is_empty_mask)
{
base.OnKeyPress(e);
return;
}
int testPosition, editPosition;
MaskedTextResultHint resultHint;
bool result;
if (e.KeyChar == '\b')
{
if (SelectionLength == 0)
{
result = provider.RemoveAt(SelectionStart - 1, SelectionStart - 1, out testPosition, out resultHint);
}
else
{
result = provider.RemoveAt(SelectionStart, SelectionStart + SelectionLength - 1, out testPosition, out resultHint);
}
editPosition = testPosition;
}
else if (IsOverwriteMode || SelectionLength > 0) // Replace
{
int start = provider.FindEditPositionFrom(SelectionStart, true);
int end = SelectionLength > 0 ? SelectionStart + SelectionLength - 1 : start;
result = provider.Replace(e.KeyChar, start, end, out testPosition, out resultHint);
editPosition = testPosition + 1;
}
else
{
// Move chars to the right
result = provider.InsertAt(e.KeyChar, SelectionStart, out testPosition, out resultHint);
editPosition = testPosition + 1;
}
PostprocessKeyboardInput(result, editPosition, testPosition, resultHint);
e.Handled = true;
}
///<inheritdoc/>
public int Cursor(int pos)
{
if (pos < 0)
{
return(CursorStart());
}
else if (pos > provider.Length)
{
return(CursorEnd());
}
else
{
var p = provider.FindEditPositionFrom(pos, false);
if (p == -1)
{
p = provider.FindEditPositionFrom(pos, true);
}
return(p);
}
}
private int GetNextCharacterPosition(int startPosition, bool goForward)
{
var position = _provider.FindEditPositionFrom(startPosition, goForward);
return(position == -1 ? startPosition : position);
}
private int FindCharacterPosition(int startPosition, bool direction = true)
{
var position = _maskedTextProvider.FindEditPositionFrom(startPosition, direction);
return(position == -1 ? startPosition : position);
}