private protected virtual string GetFocusedText(IFocusTextFocus textCellFocus)
{
string Text = null;
if (Focus is IFocusStringContentFocus AsTextFocus)
{
Text = GetFocusedStringContent(AsTextFocus);
}
else if (Focus is IFocusCommentFocus AsCommentFocus)
{
Text = GetFocusedCommentText(AsCommentFocus);
if (Text == null)
{
Text = string.Empty;
}
}
Debug.Assert(Text != null);
return(Text);
}
private protected virtual void SetTextFullSelection(IFocusTextFocus textFocus)
{
bool IsHandled = false;
if (textFocus is IFocusStringContentFocus AsStringContentFocus)
{
string Text = GetFocusedStringContent(AsStringContentFocus);
IFocusStringContentFocusableCellView CellView = AsStringContentFocus.CellView;
SelectStringContent(CellView.StateView, CellView.PropertyName, 0, Text.Length);
IsHandled = true;
}
else if (textFocus is IFocusCommentFocus AsCommentFocus)
{
string Text = GetFocusedCommentText(AsCommentFocus);
IFocusCommentCellView CellView = AsCommentFocus.CellView;
SelectComment(CellView.StateView, 0, Text.Length);
IsHandled = true;
}
Debug.Assert(IsHandled);
}
private protected virtual void SetTextSelection(IFocusTextFocus textFocus)
{
bool IsHandled = false;
int Start = CaretAnchorPosition >= 0 ? CaretAnchorPosition : 0;
int End = CaretPosition;
if (textFocus is IFocusStringContentFocus AsStringContentFocus)
{
IFocusStringContentFocusableCellView CellView = AsStringContentFocus.CellView;
SelectStringContent(CellView.StateView, CellView.PropertyName, Start, End);
IsHandled = true;
}
else if (textFocus is IFocusCommentFocus AsCommentFocus)
{
IFocusCommentCellView CellView = AsCommentFocus.CellView;
SelectComment(CellView.StateView, Start, End);
IsHandled = true;
}
Debug.Assert(IsHandled);
}
private protected virtual void SetTextCaretPosition(string text, int position, bool resetAnchor, out bool isMoved)
{
int OldPosition = CaretPosition;
if (position <= 0)
{
CaretPosition = 0;
}
else if (position >= text.Length)
{
CaretPosition = text.Length;
}
else
{
CaretPosition = position;
}
if (resetAnchor)
{
ResetSelection();
CaretAnchorPosition = CaretPosition;
}
else if (Selection == EmptySelection)
{
IFocusTextFocus AsTextFocus = Focus as IFocusTextFocus;
Debug.Assert(AsTextFocus != null);
SetTextSelection(AsTextFocus);
}
else if (Selection is IFocusTextSelection AsTextSelection)
{
AsTextSelection.Update(CaretAnchorPosition, CaretPosition);
}
CheckCaretInvariant(text);
isMoved = CaretPosition != OldPosition;
}
