public TextPosition AdjustStep(TextPosition newPosition, CaretMoveDirection moveDirection) {
var line = ((VisualTextLine)visuals[newPosition.Line]);
var charInfo = line.RenderedText != string.Empty && newPosition.Column < GetLineLength(newPosition.Line) ? line.GetCharInfoAt(newPosition.Column) : null;
if (charInfo != null) {
return charInfo.IsCharacter ? newPosition : GetAdjustedPosition(charInfo, moveDirection);
}
return newPosition;
}
public TextPosition AdjustStep(TextPosition newPosition, CaretMoveDirection moveDirection)
{
var line = ((VisualTextLine)visuals[newPosition.Line]);
var charInfo = line.RenderedText != string.Empty && newPosition.Column < GetLineLength(newPosition.Line) ? line.GetCharInfoAt(newPosition.Column) : null;
if (charInfo != null)
{
return(charInfo.IsCharacter ? newPosition : GetAdjustedPosition(charInfo, moveDirection));
}
return(newPosition);
}
private TextPosition GetAdjustedPosition(CharInfo charInfo, CaretMoveDirection moveDirection)
{
switch (moveDirection)
{
case CaretMoveDirection.LEFT:
return(charInfo.PrevCharPosition);
case CaretMoveDirection.RIGHT:
return(charInfo.NextCharPosition);
case CaretMoveDirection.BOTTOM:
case CaretMoveDirection.TOP:
return(charInfo.PrevCharPosition);
}
throw new ArgumentException(nameof(moveDirection));
}
private TextPosition GetAdjustedPosition(CharInfo charInfo, CaretMoveDirection moveDirection) {
switch (moveDirection) {
case CaretMoveDirection.LEFT:
return charInfo.PrevCharPosition;
case CaretMoveDirection.RIGHT:
return charInfo.NextCharPosition;
case CaretMoveDirection.BOTTOM:
case CaretMoveDirection.TOP:
return charInfo.PrevCharPosition;
}
throw new ArgumentException(nameof(moveDirection));
}
