* delete-horizontal-space and NO-BREAK SPACE
@ 2010-08-23 13:33 Detlev Zundel
2010-08-23 15:50 ` Drew Adams
2010-08-23 16:28 ` Andreas Röhler
0 siblings, 2 replies; 6+ messages in thread
From: Detlev Zundel @ 2010-08-23 13:33 UTC (permalink / raw
To: help-gnu-emacs
Hi,
more and more often I get emails with NO-BREAK SPACE characters (ascii
160) in them which are used for alignment purposes. When replying to
such e-mails, I usually have to edit this a lot and wish 'M-\' would
erase the whole stretch of the characters.
Looking up the definition of delete-horizontal-space, it is obvious that
it doesn't do this as it only erases " \t".
Is there another nice function really erasing all space characters
(i.e. chars belonging to the "space" category) or should the funtion be
improved?
Thanks
Detlev
--
Be careful in casting out your devil 'lest you cast out the best thing
about you.
-- Friedrich Nietzsche
^ permalink raw reply [flat|nested] 6+ messages in thread
* RE: delete-horizontal-space and NO-BREAK SPACE
2010-08-23 13:33 delete-horizontal-space and NO-BREAK SPACE Detlev Zundel
@ 2010-08-23 15:50 ` Drew Adams
2010-08-23 16:28 ` Andreas Röhler
1 sibling, 0 replies; 6+ messages in thread
From: Drew Adams @ 2010-08-23 15:50 UTC (permalink / raw
To: 'Detlev Zundel', help-gnu-emacs
> more and more often I get emails with NO-BREAK SPACE characters (ascii
> 160) in them which are used for alignment purposes. When replying to
> such e-mails, I usually have to edit this a lot and wish 'M-\' would
> erase the whole stretch of the characters.
>
> Looking up the definition of delete-horizontal-space, it is
> obvious that it doesn't do this as it only erases " \t".
>
> Is there another nice function really erasing all space characters
> (i.e. chars belonging to the "space" category) or should the
> funtion be improved?
I would suggest that you file an enhancement request, via `M-x
report-emacs-bug'. The Emacs developers will then DTRT (decide whether and where
to enhance Emacs for this).
IMO, there should be a user option that controls what "whitespace" is affected
by this and similar commands (e.g. `fixup-whitespace',
`delete-trailing-whitespace', `delete-blank-lines').
And modes and other functions should feel free to bind that option when (they
are sure it is truly) appropriate.
[Yes, I know that some consider it heresy to allow/endorse Lisp binding of user
options. I do not. Sometimes it makes sense for a function to control an option
value, but yes of course, generally the user knows best. If it is problematic
for some given option/context, then value choices can be provided for both
possibilities - some values inform programs not to override/bind. E.g., if
non-nil (or whatever), then just bind to the existing value (essentially a
no-op), respecting the user choice, else do something the program considers more
appropriate.]
^ permalink raw reply [flat|nested] 6+ messages in thread
* Re: delete-horizontal-space and NO-BREAK SPACE
2010-08-23 13:33 delete-horizontal-space and NO-BREAK SPACE Detlev Zundel
2010-08-23 15:50 ` Drew Adams
@ 2010-08-23 16:28 ` Andreas Röhler
2010-08-23 21:15 ` Detlev Zundel
1 sibling, 1 reply; 6+ messages in thread
From: Andreas Röhler @ 2010-08-23 16:28 UTC (permalink / raw
To: help-gnu-emacs
Am 23.08.2010 15:33, schrieb Detlev Zundel:
> Hi,
>
> more and more often I get emails with NO-BREAK SPACE characters (ascii
> 160) in them which are used for alignment purposes. When replying to
> such e-mails, I usually have to edit this a lot and wish 'M-\' would
> erase the whole stretch of the characters.
>
> Looking up the definition of delete-horizontal-space, it is obvious that
> it doesn't do this as it only erases " \t".
>
> Is there another nice function really erasing all space characters
> (i.e. chars belonging to the "space" category) or should the funtion be
> improved?
>
> Thanks
> Detlev
>
Hi,
to get rid of nasty single chars, I use forms like this:
(defun delete-zero-fourteen ()
"Delete chars ascii octal \\014 "
(interactive "*")
(let ((beg (cond ((region-active-p)
(region-beginning))
(t (point-min))))
(end (cond ((region-active-p)
(region-end))
(t (point-max)))))
(save-excursion
(goto-char beg)
(while (re-search-forward (concat (list 12)) end t 1)
(replace-match "")))))
HTH
Andreas
^ permalink raw reply [flat|nested] 6+ messages in thread
* Re: delete-horizontal-space and NO-BREAK SPACE
2010-08-23 16:28 ` Andreas Röhler
@ 2010-08-23 21:15 ` Detlev Zundel
2010-08-23 22:11 ` Drew Adams
2010-08-24 6:16 ` Andreas Röhler
0 siblings, 2 replies; 6+ messages in thread
From: Detlev Zundel @ 2010-08-23 21:15 UTC (permalink / raw
To: help-gnu-emacs
Hi Andreas,
[...]
> to get rid of nasty single chars, I use forms like this:
>
> (defun delete-zero-fourteen ()
> "Delete chars ascii octal \\014 "
> (interactive "*")
> (let ((beg (cond ((region-active-p)
> (region-beginning))
> (t (point-min))))
> (end (cond ((region-active-p)
> (region-end))
> (t (point-max)))))
> (save-excursion
> (goto-char beg)
> (while (re-search-forward (concat (list 12)) end t 1)
> (replace-match "")))))
> HTH
Thanks for the code but what I really wanted to know is how Emacs itself
handles this. I have a feeling that this should not need custom code to
handle. There is a function 'delete-horizontal-space' and I wanted to
know if and how it applies to this specific 'space' also.
When I encounter a problem not too specific to the special case, I
usually try to find out how other people cope with it before inventing
"yet another wheel(tm)".
If nobody else points me to a already supported way of handling my case
I'll follow Drews advise and pose the question to a wider audience.
Thanks!
Detlev
--
NAN - No Acronym Neccessary
^ permalink raw reply [flat|nested] 6+ messages in thread
* RE: delete-horizontal-space and NO-BREAK SPACE
2010-08-23 21:15 ` Detlev Zundel
@ 2010-08-23 22:11 ` Drew Adams
2010-08-24 6:16 ` Andreas Röhler
1 sibling, 0 replies; 6+ messages in thread
From: Drew Adams @ 2010-08-23 22:11 UTC (permalink / raw
To: 'Detlev Zundel', help-gnu-emacs
> Thanks for the code but what I really wanted to know is how
> Emacs itself handles this. ...
> There is a function 'delete-horizontal-space' and I wanted to
> know if and how it applies to this specific 'space' also.
That's easy:
1. C-h f delete-horizontal-space RET
2. Click the link to the library (`simple.el' in this case) where the help text
says the function (`delete-horizontal-space' in this case) is defined.
That takes you directly to the definition of `delete-horizontal-space' (source
code).
> If nobody else points me to a already supported way of
> handling my case I'll follow Drews advise and pose the question
> to a wider audience.
You will see from its definition code that `delete-horizontal-space' does not
(yet) do what you want wrt non-breaking space. But you already knew that. ;-)
^ permalink raw reply [flat|nested] 6+ messages in thread
* Re: delete-horizontal-space and NO-BREAK SPACE
2010-08-23 21:15 ` Detlev Zundel
2010-08-23 22:11 ` Drew Adams
@ 2010-08-24 6:16 ` Andreas Röhler
1 sibling, 0 replies; 6+ messages in thread
From: Andreas Röhler @ 2010-08-24 6:16 UTC (permalink / raw
To: help-gnu-emacs
Am 23.08.2010 23:15, schrieb Detlev Zundel:
> Hi Andreas,
>
>
> [...]
>
>> to get rid of nasty single chars, I use forms like this:
>>
>> (defun delete-zero-fourteen ()
>> "Delete chars ascii octal \\014 "
>> (interactive "*")
>> (let ((beg (cond ((region-active-p)
>> (region-beginning))
>> (t (point-min))))
>> (end (cond ((region-active-p)
>> (region-end))
>> (t (point-max)))))
>> (save-excursion
>> (goto-char beg)
>> (while (re-search-forward (concat (list 12)) end t 1)
>> (replace-match "")))))
>> HTH
>
> Thanks for the code but what I really wanted to know is how Emacs itself
> handles this. I have a feeling that this should not need custom code to
> handle. There is a function 'delete-horizontal-space' and I wanted to
> know if and how it applies to this specific 'space' also.
>
> When I encounter a problem not too specific to the special case, I
> usually try to find out how other people cope with it before inventing
> "yet another wheel(tm)".
>
> If nobody else points me to a already supported way of handling my case
> I'll follow Drews advise and pose the question to a wider audience.
>
> Thanks!
> Detlev
>
Hi,
some questions remain:
Can't see an (ascii 160).
Assume you got some character, whose meaning in other context is formatting.
Then it's just a character, who doesn't belong to the mode, you use.
'delete-horizontal-space' is an edit-function, not designed to cure
encoding-errors.
Presumable you got chars into a text-mode buffer, which are not text.
That may indicate a bug, but must not.
Andreas
^ permalink raw reply [flat|nested] 6+ messages in thread
end of thread, other threads:[~2010-08-24 6:16 UTC | newest]
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2010-08-23 13:33 delete-horizontal-space and NO-BREAK SPACE Detlev Zundel
2010-08-23 15:50 ` Drew Adams
2010-08-23 16:28 ` Andreas Röhler
2010-08-23 21:15 ` Detlev Zundel
2010-08-23 22:11 ` Drew Adams
2010-08-24 6:16 ` Andreas Röhler
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