heading structure ramblie

[Samuel Wales <samologist@gmail.com>]

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this is open ended.  i'd probably be happy with simple
solution but want to explore the space.

i sometimes need to know when a folded heading has children,
and also possibly go to them.  maybe it swallowed a heading
without my intention.  creating new headings with c-c *
seems to create children, when i want a sibling.  (so maybe i need a
command like c-c * that creates a sibling.  but i also want to show and
navigate heading structure.)

i'd also like to know without linting the whole file if
anything is awry locally, such as twice or more indented
(*******) or half-indented (****), when org-odd-levels-only
t.

it is too cumbersome to go to the parent and expand all with
TAB and navigate headings.

this could be solved by showing a view similar to canonical
visibility, but only headings perhaps as an org-cycle state.

i THINK this is supposed to be possible with c-u:

    2. CONTENTS: Show all headlines of all levels, but no body text.

i probably need to upgrade, but in org 9.6.7, it folds and
mangles the whole buffer.

or perhaps i can run org-fold-show-set-visibility as a
special command.  this view would show the heading structure
without anything else.  maybe it's there, but i couldn't
find such a view in org-fold-show-context-detail.

if this view is indeed present in c-u m-x org-cycle, then perhaps for
consistency it is or should be also usable in org-fold-show-set-visibility.

org-cycle uses org-cycle-content, but that folds the whole
buffer in my version of org.

perhaps i would bind a command to run (org-fold-show-context-detail
'headings-canonical) or something like that.

but maybe we can get more fancy, by running a command that
will overlay org-ellipsis with the number of direct children.

or perhaps simpler, is there a command that will go to the
next heading even if it is invisible, and unfold?  there
seems to be no org-next-heading, but there is one for
visible headings.



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