bug#41198: 27.0.60; [PATCH] heading cycling command for outline

[Yuan Fu]

> On May 18, 2020, at 10:45 PM, Stefan Kangas <stefan@marxist.se> wrote:
> 
> forcemerge 41130 41198
> thanks
> 
> Yuan Fu <casouri@gmail.com> writes:
> 
>> Add two commands that cycles a heading (like that in Org mode) in 
>> outline-mode:
>> 
>> - outline-cycle: cycles between “hide all”, “sub headings” and “show all” 
>> state. They are called “FOLDED”, “CHILDREN”, “SUBTREE” in Org mode.
>> - outline-cycle-buffer: cycles between “only top level headings”, “all 
>> headings”, “show all” states
> 
> Thanks for working on this.  I've tested your patch, and it seems to
> work as advertised.

Thanks.

> 
>> Could this be useful?
> 
> I think it could.  I have previously sent the wishlist Bug#41130, which
> I have now merged with this bug.  I have seen no objections to that
> proposal, so I hope that it is uncontroversial.
> 
> In Bug#41130, I also suggest to add the same keybinding as in org-mode:
> TAB and S-TAB.  Could you add such keybindings to outline-mode-map in
> your patch?

It seems that the outline-mode bindings all live under C-c. Maybe C-c TAB and 
C-c S-TAB? Should I ask on emacs-devel for for suggestions?

> 
> I think we also need ChangeLog in the commit message, an entry in NEWS,
> and updates to the manual.

I updated NEWS and the manual. For ChangeLog, I thought that’s automatically 
generated from commit messages?

> 
>> +(defun outline-cycle ()
>> +  "Cycle between “hide all”, “headings only” and “show all”.
>> +
>> +“Hide all” means hide all subheadings and their bodies.
>> +“Headings only” means show sub headings but not their bodies.
>> +“Show all” means show all subheadings and their bodies."
> 
> I can't remember seeing double quotes used like that before in doc
> strings.  Correct me if I'm wrong, but wouldn't we normally use
> `single-quotes' for something like this?
> 

Done.

Yuan

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