overlay debugging

overlay debugging

[Alex Schroeder]

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In GNU Emacs 21.2.1 (i386-msvc-nt5.0.2195)
 of 2002-03-19 on buffy
configured using `configure --with-msvc (12.00)'
Important settings:
  value of $LC_ALL: nil
  value of $LC_COLLATE: nil
  value of $LC_CTYPE: nil
  value of $LC_MESSAGES: nil
  value of $LC_MONETARY: nil
  value of $LC_NUMERIC: nil
  value of $LC_TIME: nil
  value of $LANG: DES
  locale-coding-system: iso-latin-1
  default-enable-multibyte-characters: t

Please describe exactly what actions triggered the bug
and the precise symptoms of the bug:


When I want to check why a given character in a given buffer looks and
acts the way it does, I like to use M-x list-text-properties.  What I
like about it is the list of all text-properties used and their
values.  Now if the information I want is in overlays, I cannot get to
it.  I must use M-: (setq o (overlays-at (point))) switch to the
scratch buffer and test some of the properties myself explicitly,
there is no way to "just list" them.

There is an interesting function get-char-property, but that, too,
requires me to give the property.  I would like something like M-x
list-char-properties-at (with all the properties in effect at t, and
list-overlay-properties-at (with a section for every overlay at point
and every property in those overlays as structured as with
list-text-properties-at).

Alex.


Recent input:
<tab> <return> t y p e <return> n <tab> <return> <tab> 
<return> <next> <next> <next> <next> n <next> <next> 
<next> <up> <up> <up> <up> <up> <up> <up> <up> <up> 
<up> <up> <up> <up> <prior> <prior> <prior> <prior> 
<next> <next> p <next> <next> <next> <next> n p <tab> 
<tab> <tab> <tab> <tab> <tab> <next> <next> <next> 
<tab> <return> <escape> x a p r o p o s <return> o 
<return> C-c C-g <escape> x <up> <return> ^ o $ <return> 
<down-mouse-1> <mouse-1> <down> <down> <down> <up> 
<return> <down> <down> q q <escape> x r e p o r t <tab> 
<return>

Recent messages:
Composing main Info directory...done
Making completion list...
Info-extract-pointer: Node has no Next
call-interactively: End of buffer [2 times]
Auto-saving...done
Loading apropos...done
call-interactively: Quit
Loading pp...done
Type M-x switch-to-buffer-other-window RET to restore the other window.  C-M-v to scroll the help.
Loading emacsbug...done

Re: overlay debugging

[Colin Walters]

On Wed, 2002-06-05 at 05:18, Alex Schroeder wrote:

> When I want to check why a given character in a given buffer looks and
> acts the way it does, I like to use M-x list-text-properties.  What I
> like about it is the list of all text-properties used and their
> values.  Now if the information I want is in overlays, I cannot get to
> it.  I must use M-: (setq o (overlays-at (point))) switch to the
> scratch buffer and test some of the properties myself explicitly,
> there is no way to "just list" them.

Does the function `describe-text-at' do what you want?

Re: overlay debugging

[Alex Schroeder]

walters@gnu.org (Colin Walters) writes:

> On Wed, 2002-06-05 at 05:18, Alex Schroeder wrote:
>
>> When I want to check why a given character in a given buffer looks and
>> acts the way it does, I like to use M-x list-text-properties.  What I
>> like about it is the list of all text-properties used and their
>> values.  Now if the information I want is in overlays, I cannot get to
>> it.  I must use M-: (setq o (overlays-at (point))) switch to the
>> scratch buffer and test some of the properties myself explicitly,
>> there is no way to "just list" them.
>
> Does the function `describe-text-at' do what you want?

The function seems to be undefined in GNU Emacs 21.2.90.1
(i686-pc-linux-gnu, X toolkit, Xaw3d scroll bars) of 2002-05-28 on
confusibombus...

Alex.
-- 
http://www.electronicintifada.net/diaries/index.html
http://www.us-israel.org/jsource/US-Israel/hr2506c.html

Re: overlay debugging

[Colin Walters]

On Wed, 2002-06-05 at 19:45, Alex Schroeder wrote:

> The function seems to be undefined in GNU Emacs 21.2.90.1
> (i686-pc-linux-gnu, X toolkit, Xaw3d scroll bars) of 2002-05-28 on
> confusibombus...

Ah, sorry for not checking released Emacs versions.  This would explain
why it's not in 21.2:

2002-02-14  Per Abrahamsen  <abraham@dina.kvl.dk>

	* facemenu.el (describe-text-done): New function.
	[...]
	(describe-text-at): New command.

So it seems this function will come out with Emacs 21.4.