From: Andreas Roehler <andreas.roehler@online.de>
To: Kevin Rodgers <kevin.d.rodgers@gmail.com>
Cc: emacs-devel@gnu.org
Subject: Re: Documentation of transient-mark-mode is sloppy, wrong, and confused.
Date: Fri, 29 May 2009 07:47:50 +0200 [thread overview]
Message-ID: <4A1F7706.80501@online.de> (raw)
In-Reply-To: <gvnodp$2r3$1@ger.gmane.org>
Kevin Rodgers wrote:
> Stefan Monnier wrote:
>>> Hmmm. No you haven't. You have noted one of the circumstances in which
>>> a mark becomes active, yet haven't said what it is for a mark to BE
>>> active. It is as though a young child has asked you what "pregnant"
>>> means, and the entire gist of your answer is "a woman becomes pregnant
>>> after a kissing and cuddling session". Unless you mention the growing
>>> foetus, your answer is evasive and unhelpful, in fact not really an
>>> answer at all. What, exactly, is the essence of "active"ness, in the
>>> same way that the foetus is the essence of pregnancy?
>>
>> The problkem is that the activeness of the mark doesn't describe some
>> property of some other state. It's a state itself. In your analogy,
>> there's no foetus that would allow us to determine whether the mark
>> is active. All we have is the `mark-active' variable, so in the end all
>> we can say is "the mark is active if the mark is active".
>
> Can't we say that "the mark is active if `mark-active' is non-nil"?
>
> Note that mark-active is not mentioned in the Emacs manual, only in the
> Emacs Lisp manual.
>
We have three states but two words for now to describe it
States are:
- the mark is set
- the mark is set and exists at different location from point, i.e. region has an extent
- region has an extent and is visible (transient-mark-mode on)
The both first may be described with `exist'
The both latter with `active'
Confusion might be solved naming the states
1) region-exists-p
2) region-has-extent
3) region-is-visible
Best regards
Andreas Röhler
next prev parent reply other threads:[~2009-05-29 5:47 UTC|newest]
Thread overview: 33+ messages / expand[flat|nested] mbox.gz Atom feed top
2009-05-28 12:29 Documentation of transient-mark-mode is sloppy, wrong, and confused Alan Mackenzie
2009-05-28 16:54 ` Chong Yidong
2009-05-28 20:15 ` Alan Mackenzie
2009-05-28 20:48 ` Chong Yidong
2009-05-28 23:03 ` Alan Mackenzie
2009-05-28 23:53 ` Davis Herring
2009-05-29 11:01 ` Alan Mackenzie
2009-05-29 0:21 ` Chong Yidong
2009-05-29 1:55 ` Stefan Monnier
2009-05-29 4:30 ` Kevin Rodgers
2009-05-29 5:47 ` Andreas Roehler [this message]
2009-05-29 8:25 ` Stephen J. Turnbull
2009-05-29 8:58 ` Alan Mackenzie
2009-06-01 2:34 ` Stephen J. Turnbull
2009-06-01 9:40 ` Lennart Borgman
2009-06-02 6:23 ` Andreas Roehler
2009-06-02 11:50 ` Stephen J. Turnbull
2009-05-29 8:37 ` Eli Zaretskii
2009-05-29 9:27 ` Alan Mackenzie
2009-05-29 10:11 ` Eli Zaretskii
2009-05-29 13:13 ` Alan Mackenzie
2009-05-29 14:19 ` Stefan Monnier
2009-05-29 16:40 ` Drew Adams
2009-05-29 22:20 ` Alan Mackenzie
2009-05-30 0:11 ` Drew Adams
2009-05-29 9:55 ` Stephen J. Turnbull
2009-05-29 10:14 ` Eli Zaretskii
2009-06-01 2:09 ` Stephen J. Turnbull
2009-05-29 10:45 ` Andreas Roehler
2009-05-29 8:38 ` Eli Zaretskii
2009-05-29 9:35 ` Alan Mackenzie
2009-05-29 9:48 ` Eli Zaretskii
2009-05-29 13:17 ` Alan Mackenzie
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