How to delete the last character in the table.cell[0,0]?

[aayaay]

[Sergey Tkachenko]

As an editing operation (undoable) ?

[aayaay]

No, code implementation, not user operation.
Is to deal with an existing text.
Or replace, for example, '? 'replace'!'. Note that only the last one character, not the full text.

[aayaay]

I have solved..

[Sergey Tkachenko]

I am very sorry for the delay.

The task is not as simple as it may seem.
Possible cases:
1) The last item is a text item having more than 1 character.
Action: delete the last character from this item.
2) The last item is a non-text item or a text item containing 1 (or less) characters.
Action: deleting this item. If this item is after a list marker, deleting the marker as well. But if this is the single item in the cell, we replace it with empty text instead.

Code: Select all

procedure DeleteLastCharacter(RVData: TCustomRVData);
var
  ItemNo, ParaNo, TextStyleNo: Integer;
  S: String;
begin
  if RVData.ItemCount = 0 then
    exit;
  ItemNo := RVData.ItemCount - 1;

  if (RVData.GetItemStyle(ItemNo) < 0) or (Length(RVData.GetItemText(ItemNo)) < 2) then
  begin
    if (ItemNo > 0) and not ((ItemNo = 1) and (RVData.GetItemStyle(ItemNo - 1) = rvsListMarker)) then
    begin
      // deleting the last item (non-text or empty or single character)
      RVData.DeleteItems(ItemNo, 1);
      dec(ItemNo);
      // if it was after a list marker, deleting the marker as well
      if (ItemNo >= 0) and (RVData.GetItemStyle(ItemNo) = rvsListMarker) then
        RVData.DeleteItems(ItemNo, 1);
    end
    else if RVData.GetItemStyle(ItemNo) < 0 then
    begin
      // replacing the last non-text item with empty text
      ParaNo := RVData.GetItemPara(ItemNo);
      TextStyleNo := Min(RVData.GetActualTextStyle(RVData.GetItem(ItemNo)), 0);
      RVData.DeleteItems(ItemNo, 1);
      RVData.AddNL('', TextStyleNo, ParaNo);
    end
    else
      // deleting the last character of a single character item
      RVData.SetItemText(ItemNo, '');
  end
  else
  begin
    // deleting the last character from the last text item
    S := RVData.GetItemText(ItemNo);
    Delete(S, Length(S), 1);
    RVData.SetItemText(ItemNo, S);
  end;
end;

Call:

Code: Select all

DeleteLastCharacter(Table.Cells[0,0].GetRVData);
RichView1.Format; // or you can use BeginItemModify/EndItemModify instead of format

PS: I did not test this code properly, if it has bugs, let me know.