* Q: Invisible text spec + define minor mode macro
@ 2021-04-21 8:04 Arthur Miller
2021-04-21 9:16 ` Eli Zaretskii
2021-04-21 9:36 ` Joost Kremers
0 siblings, 2 replies; 9+ messages in thread
From: Arthur Miller @ 2021-04-21 8:04 UTC (permalink / raw)
To: emacs-devel
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[-- Attachment #3: Type: text/plain, Size: 974 bytes --]
I am not sure what is going on here. I have this minor mode defined,
as shown yesterday, where I just iterate through a buffer and try to
make certain lines invisible.
It seems that visibility property updates only for about 2 ~ 3 pages of
text. When I bring text into visible portion of screen and re-run the
mode, it is updated as it should. Does it have to do something with how
invisible text is rendered? I think it shouldn't but I don't understand
what is going on here? The search seems to properly find all src markers
in entire buffer, and all lines are "equal" (machine generated), so
there is no reason why some parts should work and others dont.
Another issue is with minor mode definition. I am trying to use
mode-variable to toggle on/off as I understand the docs it should be
used, but I have to call it twice in org file. Do I need to use
another boolean value to check on, or could I use mode-variable for this
purpose? I thought it was ment for this.
^ permalink raw reply [flat|nested] 9+ messages in thread
* Re: Q: Invisible text spec + define minor mode macro
2021-04-21 8:04 Q: Invisible text spec + define minor mode macro Arthur Miller
@ 2021-04-21 9:16 ` Eli Zaretskii
2021-04-21 9:55 ` Arthur Miller
2021-04-21 17:19 ` Arthur Miller
2021-04-21 9:36 ` Joost Kremers
1 sibling, 2 replies; 9+ messages in thread
From: Eli Zaretskii @ 2021-04-21 9:16 UTC (permalink / raw)
To: Arthur Miller; +Cc: emacs-devel
> From: Arthur Miller <arthur.miller@live.com>
> Date: Wed, 21 Apr 2021 10:04:17 +0200
>
> I am not sure what is going on here. I have this minor mode defined,
> as shown yesterday, where I just iterate through a buffer and try to
> make certain lines invisible.
>
> It seems that visibility property updates only for about 2 ~ 3 pages of
> text. When I bring text into visible portion of screen and re-run the
> mode, it is updated as it should. Does it have to do something with how
> invisible text is rendered?
In general, text being invisible or not has nothing to do with
rendering it, it only has to do with the exact form of the invisible
property and buffer's invisibility spec.
^ permalink raw reply [flat|nested] 9+ messages in thread
* Re: Q: Invisible text spec + define minor mode macro
2021-04-21 9:16 ` Eli Zaretskii
@ 2021-04-21 9:55 ` Arthur Miller
2021-04-21 17:19 ` Arthur Miller
1 sibling, 0 replies; 9+ messages in thread
From: Arthur Miller @ 2021-04-21 9:55 UTC (permalink / raw)
To: Eli Zaretskii; +Cc: emacs-devel
Eli Zaretskii <eliz@gnu.org> writes:
>> From: Arthur Miller <arthur.miller@live.com>
>> Date: Wed, 21 Apr 2021 10:04:17 +0200
>>
>> I am not sure what is going on here. I have this minor mode defined,
>> as shown yesterday, where I just iterate through a buffer and try to
>> make certain lines invisible.
>>
>> It seems that visibility property updates only for about 2 ~ 3 pages of
>> text. When I bring text into visible portion of screen and re-run the
>> mode, it is updated as it should. Does it have to do something with how
>> invisible text is rendered?
>
> In general, text being invisible or not has nothing to do with
> rendering it, it only has to do with the exact form of the invisible
> property and buffer's invisibility spec.
Ok, that is how I understood the docs. I haven't mixed with the
invisibility spec, I have just put 'visibility' property to 't' which
should with default spec make text invisible. It works, but just for a
part of text. If I scroll to the part of buffer where it didn't work,
and disable/enable mode then that part will work, inclusive all the
previously "seen" parts. I see no logic in that. You can check yourself
the code and test file I attached. It is embarassingly simple, I don't
understand what would be wrong there :-(, but maybe I missunderstand
something.
^ permalink raw reply [flat|nested] 9+ messages in thread
* Re: Q: Invisible text spec + define minor mode macro
2021-04-21 9:16 ` Eli Zaretskii
2021-04-21 9:55 ` Arthur Miller
@ 2021-04-21 17:19 ` Arthur Miller
2021-04-21 17:46 ` Eli Zaretskii
2021-04-21 19:25 ` Tassilo Horn
1 sibling, 2 replies; 9+ messages in thread
From: Arthur Miller @ 2021-04-21 17:19 UTC (permalink / raw)
To: Eli Zaretskii; +Cc: emacs-devel
[-- Attachment #1: Type: text/plain, Size: 1172 bytes --]
Eli Zaretskii <eliz@gnu.org> writes:
>> From: Arthur Miller <arthur.miller@live.com>
>> Date: Wed, 21 Apr 2021 10:04:17 +0200
>>
>> I am not sure what is going on here. I have this minor mode defined,
>> as shown yesterday, where I just iterate through a buffer and try to
>> make certain lines invisible.
>>
>> It seems that visibility property updates only for about 2 ~ 3 pages of
>> text. When I bring text into visible portion of screen and re-run the
>> mode, it is updated as it should. Does it have to do something with how
>> invisible text is rendered?
>
> In general, text being invisible or not has nothing to do with
> rendering it, it only has to do with the exact form of the invisible
> property and buffer's invisibility spec.
After playing a bit more: if I scroll through entire file before I
enable my mode, then entire file is processed correctly. But if file is
not scrolled through, then only 3½ screen pages are processed. Has
nothing to do with regex I use, just with text being shown on screen or
not. I don't find anything in docs about that. A bug? Or undocumented
behaviour? Or something else I am missing here?
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^ permalink raw reply [flat|nested] 9+ messages in thread
* Re: Q: Invisible text spec + define minor mode macro
2021-04-21 17:19 ` Arthur Miller
@ 2021-04-21 17:46 ` Eli Zaretskii
2021-04-21 19:25 ` Tassilo Horn
1 sibling, 0 replies; 9+ messages in thread
From: Eli Zaretskii @ 2021-04-21 17:46 UTC (permalink / raw)
To: Arthur Miller; +Cc: emacs-devel
> From: Arthur Miller <arthur.miller@live.com>
> Cc: emacs-devel@gnu.org
> Date: Wed, 21 Apr 2021 19:19:25 +0200
>
> > In general, text being invisible or not has nothing to do with
> > rendering it, it only has to do with the exact form of the invisible
> > property and buffer's invisibility spec.
>
> After playing a bit more: if I scroll through entire file before I
> enable my mode, then entire file is processed correctly. But if file is
> not scrolled through, then only 3½ screen pages are processed. Has
> nothing to do with regex I use, just with text being shown on screen or
> not. I don't find anything in docs about that. A bug? Or undocumented
> behaviour? Or something else I am missing here?
At this point I don't know. Please submit a bug report with the
minimal recipe for reproducing the problem in "emacs -Q", and someone
will take a look.
Thanks.
^ permalink raw reply [flat|nested] 9+ messages in thread
* Re: Q: Invisible text spec + define minor mode macro
2021-04-21 17:19 ` Arthur Miller
2021-04-21 17:46 ` Eli Zaretskii
@ 2021-04-21 19:25 ` Tassilo Horn
2021-04-21 20:14 ` Arthur Miller
1 sibling, 1 reply; 9+ messages in thread
From: Tassilo Horn @ 2021-04-21 19:25 UTC (permalink / raw)
To: Arthur Miller; +Cc: emacs-devel
Arthur Miller <arthur.miller@live.com> writes:
Hi Arthur,
> After playing a bit more: if I scroll through entire file before I
> enable my mode, then entire file is processed correctly. But if file
> is not scrolled through, then only 3½ screen pages are processed. Has
> nothing to do with regex I use, just with text being shown on screen
> or not. I don't find anything in docs about that. A bug? Or
> undocumented behaviour? Or something else I am missing here?
I've tried it and can confirm your observations. Your code is correct,
though. The funcion `hbm--update-line' is called 400 times at the right
positions and puts the 'invisible text property there.
Then I augmented that function to spit out the `buffer-substring' where
it puts the property, and that showed that lines became invisible where
the text was already fontified such as
#("#+end_src" 0 4 (fontified t font-lock-fontified t
font-lock-multiline t face org-block-end-line wrap-prefix #("#" 0 1
(face org-block-end-line font-lock-multiline t font-lock-fontified t
fontified t))) 4 9 (fontified t font-lock-fontified t
font-lock-multiline t face org-block-end-line wrap-prefix #("#" 0 1
(face org-block-end-line font-lock-multiline t font-lock-fontified t
fontified t))))
and stopped working at the next line
#("#+begin_src emacs-lisp" 0 22 (fontified nil))
which is not yet fontified. And indeed, as soon as you disable
`font-lock-mode' your minor mode starts working fine. (With
`font-lock-mode', you can "unhide" a line also by editing in it which
will trigger refontification of that region.)
The problem is in Org: it has tons of fontification functions such as
`org-fontify-meta-lines-and-blocks' which calls
`org-fontify-meta-lines-and-blocks-1' which removes `display',
`invisible', and `intangible' text properties.
So it seems you cannot use those properties in a sensible way in org
files...
Bye,
Tassilo
^ permalink raw reply [flat|nested] 9+ messages in thread* Re: Q: Invisible text spec + define minor mode macro
2021-04-21 19:25 ` Tassilo Horn
@ 2021-04-21 20:14 ` Arthur Miller
0 siblings, 0 replies; 9+ messages in thread
From: Arthur Miller @ 2021-04-21 20:14 UTC (permalink / raw)
To: Tassilo Horn; +Cc: emacs-devel
Tassilo Horn <tsdh@gnu.org> writes:
> Arthur Miller <arthur.miller@live.com> writes:
>
> Hi Arthur,
>
>> After playing a bit more: if I scroll through entire file before I
>> enable my mode, then entire file is processed correctly. But if file
>> is not scrolled through, then only 3½ screen pages are processed. Has
>> nothing to do with regex I use, just with text being shown on screen
>> or not. I don't find anything in docs about that. A bug? Or
>> undocumented behaviour? Or something else I am missing here?
>
> I've tried it and can confirm your observations. Your code is correct,
> though. The funcion `hbm--update-line' is called 400 times at the right
> positions and puts the 'invisible text property there.
>
> Then I augmented that function to spit out the `buffer-substring' where
> it puts the property, and that showed that lines became invisible where
> the text was already fontified such as
>
> #("#+end_src" 0 4 (fontified t font-lock-fontified t
> font-lock-multiline t face org-block-end-line wrap-prefix #("#" 0 1
> (face org-block-end-line font-lock-multiline t font-lock-fontified t
> fontified t))) 4 9 (fontified t font-lock-fontified t
> font-lock-multiline t face org-block-end-line wrap-prefix #("#" 0 1
> (face org-block-end-line font-lock-multiline t font-lock-fontified t
> fontified t))))
>
> and stopped working at the next line
>
> #("#+begin_src emacs-lisp" 0 22 (fontified nil))
>
> which is not yet fontified. And indeed, as soon as you disable
> `font-lock-mode' your minor mode starts working fine. (With
> `font-lock-mode', you can "unhide" a line also by editing in it which
> will trigger refontification of that region.)
>
> The problem is in Org: it has tons of fontification functions such as
> `org-fontify-meta-lines-and-blocks' which calls
> `org-fontify-meta-lines-and-blocks-1' which removes `display',
> `invisible', and `intangible' text properties.
>
> So it seems you cannot use those properties in a sensible way in org
> files...
>
> Bye,
> Tassilo
Thank you very much for looking through it and clarifying what
happens. Eli also explained in the bug repport what is going on.
I will try with custom visibility spec instead and see if I can keep my
property that way :).
Thanks!
^ permalink raw reply [flat|nested] 9+ messages in thread
* Re: Q: Invisible text spec + define minor mode macro
2021-04-21 8:04 Q: Invisible text spec + define minor mode macro Arthur Miller
2021-04-21 9:16 ` Eli Zaretskii
@ 2021-04-21 9:36 ` Joost Kremers
2021-04-21 10:02 ` Arthur Miller
1 sibling, 1 reply; 9+ messages in thread
From: Joost Kremers @ 2021-04-21 9:36 UTC (permalink / raw)
To: Arthur Miller; +Cc: emacs-devel
On Wed, Apr 21 2021, Arthur Miller wrote:
> I am not sure what is going on here. I have this minor mode defined,
> as shown yesterday, where I just iterate through a buffer and try to
> make certain lines invisible.
Wouldn't it be easier to use the font lock mechanism for this? That way, you
basically only need to worry about getting the regexp right. Finding matches,
updating the display, etc. is all handled by Emacs.
The `invisible' property is not normally handled by font lock, I guess, but
there is a variable `font-lock-extra-managed-props', which, by the looks of it,
should be able to remedy that.
Mind you, I only understand the basics of the font lock mechanism and I haven't
tried this, so it's possible this is a silly suggestion. It's just the first
thing I'd try...
--
Joost Kremers
Life has its moments
^ permalink raw reply [flat|nested] 9+ messages in thread
* Re: Q: Invisible text spec + define minor mode macro
2021-04-21 9:36 ` Joost Kremers
@ 2021-04-21 10:02 ` Arthur Miller
0 siblings, 0 replies; 9+ messages in thread
From: Arthur Miller @ 2021-04-21 10:02 UTC (permalink / raw)
To: Joost Kremers; +Cc: emacs-devel
Joost Kremers <joostkremers@fastmail.fm> writes:
> On Wed, Apr 21 2021, Arthur Miller wrote:
>> I am not sure what is going on here. I have this minor mode defined,
>> as shown yesterday, where I just iterate through a buffer and try to
>> make certain lines invisible.
>
> Wouldn't it be easier to use the font lock mechanism for this? That way, you
> basically only need to worry about getting the regexp right. Finding matches,
> updating the display, etc. is all handled by Emacs.
>
> The `invisible' property is not normally handled by font lock, I guess, but
> there is a variable `font-lock-extra-managed-props', which, by the looks of it,
> should be able to remedy that.
>
> Mind you, I only understand the basics of the font lock mechanism and I haven't
> tried this, so it's possible this is a silly suggestion. It's just the first
> thing I'd try...
I don't think it is a silly, but I think it would be more complicated. I
don't know to be honest, I am not so acquinted with font-lock mechanism
and I don't wanna dive into that one.
I really just need to find each #+begin|end_src which usually start at
line beginning and put the invisible property to 't. That is really
simple. If you check the code, it is almost trivial. I am embarassed I
can't spot what is wrong there :-). The regex in the source file
works. I checked, I counted all matches and got 401 for 200 src blocks.
I think it should be 400, but I am good with 401 :-).
But thanks for the suggestion anyway.
^ permalink raw reply [flat|nested] 9+ messages in thread
end of thread, other threads:[~2021-04-21 20:14 UTC | newest]
Thread overview: 9+ messages (download: mbox.gz / follow: Atom feed)
-- links below jump to the message on this page --
2021-04-21 8:04 Q: Invisible text spec + define minor mode macro Arthur Miller
2021-04-21 9:16 ` Eli Zaretskii
2021-04-21 9:55 ` Arthur Miller
2021-04-21 17:19 ` Arthur Miller
2021-04-21 17:46 ` Eli Zaretskii
2021-04-21 19:25 ` Tassilo Horn
2021-04-21 20:14 ` Arthur Miller
2021-04-21 9:36 ` Joost Kremers
2021-04-21 10:02 ` Arthur Miller
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