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From: "Drew Adams" <drew.adams@oracle.com>
To: "'Harald Hanche-Olsen'" <hanche@math.ntnu.no>, <emacs-devel@gnu.org>
Subject: RE: `save-excursion' defeated by `set-buffer'
Date: Sun, 10 Jan 2010 10:06:41 -0800	[thread overview]
Message-ID: <CCAF1C34202645DA8C6F7F119FADB549@us.oracle.com> (raw)
In-Reply-To: <20100110.105820.347261995.hanche@math.ntnu.no>

> A is inserted four places after point, but point does not move:
> (with-current-buffer "*scratch*" (forward-char 4) (insert "A"))
 
Actually, I think that `point' does move. What doesn't move is `window-point'.
Which is the correct behavior.

Try `M-x foo' (a) with *scratch* displayed and (b) without *scratch* displayed:

(defun foo ()
  (interactive)
  (with-current-buffer "*scratch*"
    (bar) (forward-char 4)
    (bar) (insert "A")
    (bar)))

(defun bar ()
  (message
   "%S, %S, %S"
   (current-buffer)
   (point)
   (and (get-buffer-window "*scratch*" 0)
        (window-point
         (get-buffer-window "*scratch*" 0)))))

Starting with point at 1, you see this:

(a) *scratch* displayed
#<buffer *scratch*>, 1, 1
#<buffer *scratch*>, 5, 1
#<buffer *scratch*>, 6, 1

(b) *scratch* not displayed
#<buffer *scratch*>, 1, nil
#<buffer *scratch*>, 5, nil
#<buffer *scratch*>, 6, nil





  parent reply	other threads:[~2010-01-10 18:06 UTC|newest]

Thread overview: 35+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2009-12-20 19:19 `save-excursion' defeated by `set-buffer' Roland Winkler
2009-12-21 15:26 ` Stefan Monnier
2009-12-21 16:23   ` David Kastrup
2009-12-22 12:51     ` martin rudalics
2009-12-23  0:45     ` Stefan Monnier
2009-12-23  9:07       ` David Kastrup
2009-12-24  4:35         ` Stefan Monnier
2009-12-24  9:03           ` David Kastrup
2009-12-29 16:01             ` Stefan Monnier
2010-01-04  9:09               ` Drew Adams
2010-01-04 18:30                 ` Stefan Monnier
2010-01-05 20:17                   ` David Kastrup
2010-01-06  0:02                     ` Drew Adams
2010-01-06  4:20                       ` Stefan Monnier
2010-01-06  8:07                         ` David Kastrup
2010-01-06  8:57                           ` Drew Adams
2010-01-10  4:57                             ` Stefan Monnier
2010-01-10  8:12                               ` David Kastrup
2010-01-10 21:43                                 ` Stefan Monnier
2010-01-11  8:24                                   ` David Kastrup
2010-01-11  9:21                                     ` martin rudalics
2010-01-11 16:50                                       ` Stefan Monnier
2010-01-10 17:03                               ` Drew Adams
2010-01-10  4:51                           ` Stefan Monnier
2010-01-10 15:58                         ` Harald Hanche-Olsen
2010-01-10 18:05                           ` martin rudalics
2010-01-10 18:06                           ` Drew Adams [this message]
2010-01-10 19:44                             ` Harald Hanche-Olsen
2009-12-24 14:04   ` Roland Winkler
2010-01-04 17:08   ` Davis Herring
2010-01-04 17:34     ` David Kastrup
2010-01-04 18:33     ` Stefan Monnier
  -- strict thread matches above, loose matches on Subject: below --
2009-12-18  9:20 Eli Zaretskii
2009-12-18 15:29 ` Juanma Barranquero
2009-12-18 15:58   ` Thierry Volpiatto

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