Re: 22.1.50; newsticker and buffer-invisibility-spec:

[Ulf Jasper <ulf.jasper@web.de>]

> "T. V. Raman" <raman@users.sf.net> writes:
>> Its bizarre use of buffer-invisibility-spec was triggering a bug
>> in the context of Emacspeak. I've fixed my code to work around it
>> -- but it would be good to get newsticker fixed up to match
>> emacs' use of buffer-invisibility-spec.

Newsticker sets `buffer-invisibility-spec´ to a list like '(ATOM1
ATOM2 ... ATOMn). It also sets the 'invisible text property to a list
like ´(ATOMi ... ATOMk). If I understand the Elisp manual (for GNU
Emacs 22.1) correctly,
----------------------------------------------------------------------
 -- Variable: buffer-invisibility-spec
     This variable specifies which kinds of `invisible' properties
     actually make a character invisible.  Setting this variable makes
     it buffer-local.

    `t'
          A character is invisible if its `invisible' property is
          non-`nil'.  This is the default.

    a list
          Each element of the list specifies a criterion for
          invisibility; if a character's `invisible' property fits any
          one of these criteria, the character is invisible.  The list
          can have two kinds of elements:

         `ATOM'
               A character is invisible if its `invisible' property
               value is ATOM or if it is a list with ATOM as a member.

         `(ATOM . t)'
               A character is invisible if its `invisible' property
               value is ATOM or if it is a list with ATOM as a member.
               Moreover, if this character is at the end of a line and
               is followed by a visible newline, it displays an
               ellipsis.
----------------------------------------------------------------------
the usage of `buffer-invisibility-spec' and the 'invisible text
property is valid. In which case it is not "bizarre", not even "odd".

Ulf

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