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Re: Q: Invisible text spec + define minor mode macro
From: |
Tassilo Horn |
Subject: |
Re: Q: Invisible text spec + define minor mode macro |
Date: |
Wed, 21 Apr 2021 21:25:58 +0200 |
User-agent: |
mu4e 1.5.11; emacs 28.0.50 |
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