Re: Re: Org-mode 'organized' visibility

[Carsten Dominik <dominik@science.uva.nl>]

This is again different behavior on Emacs 21 and Emacs 22.  What I have 
been describing was Emacs 22 behavior.  It seems that the Emacs 21 
behavior is about the same as Emacs 22 with outline-blank-lines set to 
t.

- Carsten

On Aug 24, 2006, at 22:17, Eddward DeVilla wrote:

> I don't know if I'm following or not.  I think I get the grouping you
> are after.  If trailing blank line are empty it does not collapse into
> the text for a heading.  If it is blank, but contains white space
> character, it does collapse.
>
> So I am able to do the following
>
>    ------
>    * heading
>      I have something to say
>    <space or tab>
>    *heading 2
>      I have more to say
>
>    * unrelated heading
>      Now for something completely different
>
>    ------
>
> And this will collapse down to
>
>    ------
>    * heading
>    * heading 2
>
>    * unrelated heading
>
>    ------
>
> Along these lines, I used to wish for something like a horizontal line
> that I could throw in between 'sections'.  For the moment, I have a
> layout style that looks fine without it and without playing too many
> games with trailing blank (but not empty) lines.
>
> On 8/24/06, Carsten Dominik <dominik@science.uva.nl> wrote:
>> Hi Caspar,
>>
>> On Aug 23, 2006, at 15:13, Casper Gripenberg wrote:
>>
>> > Hi..is it possible to not make S-TAB collapse
>> > empty spaces between items. If I have a long
>> > list of items I like to organize them into
>> > groups..and then when I collapse the whole
>> > tree I'd like my groupings it to be visible like this:
>> >
>> > * Tasks...
>> >
>> > * Something important...
>> > * Something related to above...
>> >
>> > * Something else not related...
>> > * Again related...
>> > * Related...
>> >
>> > * Not related...
>> >
>> > Instead of the current way:
>> >
>> > * Tasks...
>> > * Something important...
>> > * Something related to above...
>> > * Something else not related...
>> > * Again related...
>> > * Related...
>> > * Not related...
>> >
>> > ..which doesn't allow me to see the groupings
>> > between the tasks I have. I just think grouping provides
>> > much quicker visual feedback of the tasks/headlines and
>> > their relations to each other.
>> >
>> > To implement the groupings you might have a rule that
>> > more than two empty lines between two headings will
>> > then activate 'grouping'.
>> >
>> > So if I have:
>> >
>> > * Important
>> >
>> >   Blah blah
>> >
>> > * Related
>> >
>> >   Blah blah
>> >
>> >
>> > * Not related
>> >
>> > This would collapse into:
>> >
>> > * Important...
>> > * Related...
>> >
>> > * Not related...
>> >
>> > Or something along those lines..is that possible to
>> > do somehow?
>> >
>> > Thanks..
>> >
>> > Regards,
>> >   Casper
>>
>> This is something outside the direct control of Org-mode, it is
>> entirely done by outline-mode.  Looking at outline.el, I see two
>> possibilities to address this:
>>
>> 1.  For this first one, you need a current version of Emacs (must be
>> CVS, Emacs 21 does not have this).  Outline has an undocumented 
>> feature
>> which makes it possible to relate an empty line before a heading to 
>> the
>> heading.  So when the heading is shown, the empty line is shows along
>> with it.  Similarly, a subtree is then defined to be before that empty
>> line.  As I said, this is an undocumented feature in so far as the
>> corresponding variable is not customizable.  However, you can still 
>> set
>> it in the old way using
>>
>>      (setq outline-blank-line t)
>>
>> If you do it in this way, there will be no difference between a single
>> or a double empty line.  An empty line before a heading will create an
>> empty line in the CONTENT and CHILDREN views of org-cycle.
>>
>> 2. If we insist on your convention on using two line to mark a
>> separation (we should, because it is the better convention), you would
>> have to redefine a function in outline.  This is not clean, but who
>> gives a s*** :-)  And I like this convention better, because I very
>> often want to have an empty line above a headline without it meaning a
>> separation.
>>
>> The function to modify is outline-show-heading, and it must be 
>> modified
>> after outline.el has been loaded.  If you are only using outline in
>> connection with Org-mode, here is a way to do this:
>>
>> (add-hook 'org-load-hook
>>           (lambda ()
>>             (defun outline-show-heading ()
>>               "Show the current heading and move to its end."
>>               (outline-flag-region
>>                (- (point)
>>                   (cond
>>                    ((bobp) 0)
>>                    ((equal (buffer-substring
>>                             (max (point-min) (- (point) 3))  (point))
>>                            "\n\n\n")
>>                     2)
>>                    (t 1)))
>>                (progn (outline-end-of-heading) (point))
>>                nil))))
>>
>> If you want this for other uses of outline as well, you could use
>> `eval-after-load' or defadvice to achieve this change.
>>
>> There is a small possibility that doing either of these things might
>> break something else in org-mode.  I don't think so, but maybe I am 
>> not
>> overseeing it fully.  If you see something strange, let me know.
>>
>> Hope this helps.
>>
>> - Carsten
>>
>>
>>
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>>
>
>

--
Carsten Dominik
Sterrenkundig Instituut "Anton Pannekoek"
Universiteit van Amsterdam
Kruislaan 403
NL-1098SJ Amsterdam
phone: +31 20 525 7477