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#75387
29.4; hideshow: hs-hide-level hides multiple top-level blocks as one
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Message #11 received at 75387 <at> debbugs.gnu.org (full text, mbox):
Christoph Groth wrote:
>
> Eli Zaretskii wrote:
> > Hm... the doc string of hs-hide-level says:
> >
> > Hide all blocks ARG levels below this block.
> >
> > So what is "this block" when point is at position 1 in this buffer?
>
> In my understanding position 1 corresponds to “outermost level”. Hiding
> all blocks below this level should give the same result as calling
> hs-hide-all. And indeed this is what I observe after the initial hiccup
> (e.g. after having invoked hs-hide-all and then hs-show-all).
>
> > If I move point to here:
> >
> > @total_ordering
> > class SiteFamily(metaclass=abc.ABCMeta):
> >
> > and invoke hs-hide-level, then all the "def" blocks inside this one
> > are hidden, as expected. And note that the command only hides blocks
> > that are inside the current block, not those inside other blocks of
> > the same level.
>
> Did you try this immediately after opening the file with find-file? The
> problem I observe only manifests itself until (at most) a full cycle of
> hide-all then show-all.
>
> If (after freshly loading the file - should there be a buffer visiting
> the file, I first kill it) I move point to the “@” before
> total_ordering, and invoke hs-hide-level, then I see the following (only
> showing the lower part of the buffer where something is hidden):
>
> ----------------------------------------------------------------
> ################ Sites and site families
>
> class Site(tuple):...
>
>
> @total_ordering
> class SiteFamily(metaclass=abc.ABCMeta):...
> --------------- end of buffer ----------------------------------
>
> But if I do this after invoking hs-hide-all and then hs-show-all, all
> top-level blocks are visible but hidden (as expected).
>
> If, after freshly loading the file, I position point on the “c” of
> “class SiteFamily”, and then invoke hs-hide-level, the methods of that
> class are hidden, but also top-level blocks that follow it (for example
> the function validate_hopping).
>
> On the other hand, when I invoke hs-hide-level at the same place but
> after “cycling” at least once (=hs-hide-all followed by hs-show-all),
> only the methods of the class are hidden, and following top level blocks
> remain unhidden (as I would expect).
>
> > So this could be a documentation issue, whereby the doc string doesn't
> > explain clearly enough what the command does.
>
> The behavior I observe depends on whether the file has been freshly
> opened or already “cycled”. But any correct behavior should not differ
> between a fresh buffer and one where blocks were hidden and then
> completely unhidden. Therefore I think that there is a problem
> somewhere, at least in Emacs 29.4 that I use. I have no idea whether
> this is in hideshow.all or in some other component like python.el.
I confirmed the same behavior. This is not a problem in hideshow.el.
Only immediately after the file is read, `python-nav-end-of-block'
behaves unexpectedly.
1. emacs -Q
2. Find file builder.py
3. Search "class SiteFamily" and go there
4. M-x python-nav-end-of-block
5. Search "class Symmetry" and go there
6. M-x python-nav-end-of-block
The point moves to the end of the buffer, which is not an expected
behavior. However, repeating the steps 5 and 6 does not produce this
issue.
This is the direct cause of the problem of `hs-hide-level'.
This problem does not occur when I run `font-lock-debug-fontify' after
reading the file, so it might be related to font-lock code in
python.el, but it seems that disabling font-lock does not solve this
issue. I will continue to look into this, but it may take some time.
This bug report was last modified 95 days ago.
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