/// <inheritdoc />
public override TextCaret FromBlockCaret(BlockCaret caret)
{
if (caret.Mover != Instance)
{
throw new ArgumentException("Caret does not represent the content of a TextCaret", nameof(caret));
}
var offset = new TextOffset(caret.InstanceOffset1, caret.InstanceOffset2, caret.InstanceOffset3);
return(new TextCaret((TextBlockContent)caret.InstanceDatum, offset));
}
/// <summary> Removes the given number of characters. </summary>
public void DeleteText(TextOffset start, TextOffset end)
{
var numberOfCharactersToRemove = end.CharOffset - start.CharOffset;
if (numberOfCharactersToRemove == 0)
{
return;
}
_buffer.DeleteText(start, end);
NotifyChanged();
}
private TextCaret(TextBlockContent content, TextOffset offset)
{
Content = content;
Offset = offset;
}
// <summary> Gets a cursor that is looking at the grapheme at the given index. </summary>
public static TextCaret FromOffset(TextBlockContent span, TextOffset offset)
{
// TODO validate
return(new TextCaret(span, offset));
}
/// <summary> Removes the given number of characters. </summary>
/// <param name="start"> The location at which deletion should start. </param>
/// <param name="end"> The location where deletion should end, exclusive. </param>
public void DeleteText(TextOffset start, TextOffset end)
{
_text = _text.Remove(start.CharOffset, end.CharOffset - start.CharOffset);
Recalculate();
}
