Re: Problem with gnus-article-hide-citation

[Katsumi Yamaoka <yamaoka@jpl.org>]

>>>>> David Engster wrote:
> The problem is that the hidden text practically shadows the first
> character of the visible one. You may try this with the following test
> code:

> (save-excursion
>   (set-buffer (get-buffer-create "invtest"))
>   (erase-buffer)
>   (insert "\naaaaa\nbbbbb\n")
>   (goto-char (point-min))
>   (forward-line 1)
>   (set-text-properties (point) (1+ (point-at-eol)) '(invisible t intangible t)))

> Now switch to the buffer "invtest", and put the cursor on the first
> "b". Doing C-x = here will show the hidden "a" on position 2. If you go
> one step to the right, C-x = will (correctly) show the second "b" at
> position 9.

Emacs 22.1 behaves similarly, but in Emacs 21.4, the cursor doesn't
move and C-x = shows the first "b" at position 8.  One more step to
the right, the cursor moves to the second "b".  It seems to be a bug
that has been introduced in Emacs 22.

> In fact, it seems you cannot really access the first "b" at
> position 8 through cursor movements. Therefore, EmacsSpeak would not
> only have to ignore invisible text, but skip it until it reaches the
> first visible character. This seems rather odd to me, and I also didn't
> expect that behavior after reading the section on invisible text in the
> ELisp reference.

> -David