protected override string ProcessText(ITextComponentWrapper editableText, ICaret caret)
{
// truncate text to display within the bounds of text rect.
Vector2 textRectExtents = editableText.DisplayRect.size;
float width = 0;
if (caret.GetIndex() > _drawEnd || (caret.GetIndex() == TextValue.Length && _drawStart > 0))
{
_drawEnd = caret.GetIndex();
_drawStart = _drawEnd - 1;
while (width < textRectExtents.x && _drawStart >= 0)
{
width += editableText.CharWidth(_drawStart--);
}
if (width >= textRectExtents.x)
{
_drawStart++;
}
_drawStart++;
}
else
{
if (caret.GetIndex() < _drawStart)
{
_drawStart = caret.GetIndex();
}
_drawEnd = _drawStart;
while (width < textRectExtents.x && _drawEnd < TextValue.Length)
{
width += editableText.CharWidth(_drawEnd++);
}
if (width >= textRectExtents.x)
{
_drawEnd--;
}
}
_drawStart = Mathf.Clamp(_drawStart, 0, TextValue.Length);
_drawEnd = Mathf.Clamp(_drawEnd, 0, TextValue.Length);
return(TextValue.Substring(_drawStart, _drawEnd - _drawStart));
}
private Rect HightedLineRect(int startIndex, int endIndex, float height, ITextComponentWrapper text)
{
Vector2 start = text.CursorPositionAt(startIndex);
Vector2 end = text.CursorPositionAt(endIndex);
// FIXME: add last char width according to caret moving direction.
Rect rect = new Rect(start.x, start.y - height,
Mathf.Abs(end.x + text.CharWidth(endIndex + _drawStart) - start.x), height);
return(rect);
}
