IndexedRange GetTextRange(UITextPosition fromPosition, UITextPosition toPosition)
{
// Generate IndexedPosition instances that wrap the to and from ranges
IndexedPosition @from = (IndexedPosition)fromPosition;
IndexedPosition @to = (IndexedPosition)toPosition;
NSRange range = new NSRange(Math.Min(@from.Index, @to.Index), Math.Abs(to.Index - @from.Index));
return(IndexedRange.GetRange(range));
}
RectangleF FirstRect(UITextRange range)
{
// FIXME: the Objective-C code doesn't get a null range
// This is the reason why we don't get the autocorrection suggestions
// (it'll just autocorrect without showing any suggestions).
// Possibly due to http://bugzilla.xamarin.com/show_bug.cgi?id=265
IndexedRange r = (IndexedRange)(range ?? IndexedRange.GetRange(new NSRange(0, 1)));
// Use underlying SimpleCoreTextView to get rect for range
RectangleF rect = textView.FirstRect(r.Range);
// Convert rect to our view coordinates
return(ConvertRectFromView(rect, textView));
}
IndexedRange GetCharacterRange(UITextPosition position, UITextLayoutDirection direction)
{
// Note that this sample assumes LTR text direction
IndexedPosition pos = (IndexedPosition)position;
NSRange result = new NSRange(pos.Index, 1);
switch (direction)
{
case UITextLayoutDirection.Up:
case UITextLayoutDirection.Left:
result = new NSRange(pos.Index - 1, 1);
break;
case UITextLayoutDirection.Right:
case UITextLayoutDirection.Down:
result = new NSRange(pos.Index, 1);
break;
}
// Return range using our UITextRange implementation
// Note that range is not currently checked against document range.
return(IndexedRange.GetRange(result));
}