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Re: [O] How to track down "No heading for this item in buffer or region.
From: |
J. David Boyd |
Subject: |
Re: [O] How to track down "No heading for this item in buffer or region."? |
Date: |
Fri, 25 Jan 2013 11:11:21 -0500 |
User-agent: |
Gnus/5.13 (Gnus v5.13) Emacs/24.2 (gnu/linux) |
Nick Dokos <address@hidden> writes:
> Bastien <address@hidden> wrote:
>
>> Nick Dokos <address@hidden> writes:
>>
>> > to try to reproduce Rainer's problem, when I first construct the agenda,
>> > I get *both* the TODO and the no-heading message: text properties are not
>> > active. If I then visit the file (e.g. RET on the TODO item) and construct
>> > the agenda again, neither the TODO nor the no-heading message
>> > appears.
>>
>> I see -- it was not obvious to me you were trying without opening the
>> file in a buffer. With my patch, I can reproduce the error, but only
>> the TODO (which appears instead of being skipped, not with the
>> timestamp line. Yes, seems related to properties. I'll digg further.
>>
>
> Not quite: the file *is* opened in a buffer (the agenda code opens all the
> files, I presume with find-file-noselect), but the text properties are
> not up to date. It's only when I explicitly visit the buffer
> that they get updated.
>
> E.g. if you evaluate
>
> (setq buf (find-file-noselect "/path/to/test.org"))
> (with-current-buffer buf
> (setq s (buffer-substring 1 2)))
>
> the echo area shows
>
> ,----
> | #("#" 0 1 (fontified nil))
> `----
>
> But if you visit the buffer with C-x b test.org RET and then
> evaluate the second form again, you get
>
> ,----
> | #("#" 0 1 (fontified t font-lock-fontified t face font-lock-comment-face))
> `----
>
> There is a section on lazy properties in the elisp manual but I don't
> know how to use the mechanism described there: there are no examples in
> current emacs code, some half-hearted experiments failed for unknown
> reasons, and googling a bit found only one relevant thread in the emacs
> group from 2004 - quoting Stefan Monnier from that thread:
>
> #+BEGIN_QUOTE
> I think the lazy text properties that you refer to (i.e. variable
> buffer-access-fontify-functions) are a sadly perfect example of C code
> implemented before we knew what we needed. It's implemented,
> documented, and 100% unused.
> #+END_QUOTE
>
> AFAICT, nothing has been done in this area since then.
>
> Nick
>
> PS. Here's the trivial test.org again for completeness:
>
> # timestamp: <2013-01-24 Thu>
>
> * TODO foo
> # SCHEDULED: <2013-01-24 Thu>
There was a message in here a while back about something like this. I
can't find it at the moment, but the author talked about org mode hooks
that aren't being run when a file is loaded or moved to from the agenda,
only when explicitly loaded. He had a work around for that, but I
don't recall that either.... Sorry for no more help than this
- [O] How to track down "No heading for this item in buffer or region."?, Gregor Zattler, 2013/01/24
- Re: [O] How to track down "No heading for this item in buffer or region."?, Bastien, 2013/01/24
- Re: [O] How to track down "No heading for this item in buffer or region."?, Gregor Zattler, 2013/01/24
- Re: [O] How to track down "No heading for this item in buffer or region."?, Nick Dokos, 2013/01/24
- Re: [O] How to track down "No heading for this item in buffer or region."?, Nick Dokos, 2013/01/24
- Re: [O] How to track down "No heading for this item in buffer or region."?, Bastien, 2013/01/24
- Re: [O] How to track down "No heading for this item in buffer or region."?, Bastien, 2013/01/24
- Re: [O] How to track down "No heading for this item in buffer or region."?, Nick Dokos, 2013/01/24
- Re: [O] How to track down "No heading for this item in buffer or region."?, Bastien, 2013/01/24
- Re: [O] How to track down "No heading for this item in buffer or region."?, Nick Dokos, 2013/01/25
- Re: [O] How to track down "No heading for this item in buffer or region."?,
J. David Boyd <=
- Re: [O] How to track down "No heading for this item in buffer or region."?, Bastien, 2013/01/26
- Re: [O] How to track down "No heading for this item in buffer or region."?, Nick Dokos, 2013/01/26
- Re: [O] How to track down "No heading for this item in buffer or region."?, Bastien, 2013/01/31