GNU bug report logs - #7474
In latest source, icomplete-mode makes cursor disappear in minibuffer

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Message #5 received at submit <at> debbugs.gnu.org (full text, mbox):

From: flitterio <at> gmail.com (Francis Litterio)
To: bug-gnu-emacs <at> gnu.org
Subject: In latest source, icomplete-mode makes cursor disappear in minibuffer
Date: Wed, 24 Nov 2010 14:56:28 -0500

Using Emacs built from the latest source on Windows 7, the cursor
can be made to disappear as follows:

1. Start Emacs with: emacs -Q

2. Type: ESC ESC : (icomplete-mode 1) RET C-h v desc

3. The cursor is no longer visisble in the minibuffer.

4. Type: C-b

5. The cursor is visible over the letter 'c' in "desc".

6. Type: C-f

7. The cursor is once again no longer visible.

This is acting like some of the text in the minibuffer has the
'intangible property, but the word "intangible" doesn't appear anywhere
in lisp/icomplete.el.
--
Fran

Message #8 received at submit <at> debbugs.gnu.org (full text, mbox):

From: Fran <flitterio <at> gmail.com>
To: bug-gnu-emacs <at> gnu.org
Subject: Re: bug#7474: In latest source,	icomplete-mode
	makes cursor disappear in minibuffer
Date: Wed, 24 Nov 2010 20:21:18 +0000 (UTC)

I wrote:

> Using Emacs built from the latest source on Windows 7, the cursor
> can be made to disappear as follows:
> 
> 1. Start Emacs with: emacs -Q
> 
> 2. Type: ESC ESC : (icomplete-mode 1) RET C-h v desc
> 
> 3. The cursor is no longer visisble in the minibuffer.
> 
> 4. Type: C-b
> 
> 5. The cursor is visible over the letter 'c' in "desc".
> 
> 6. Type: C-f
> 
> 7. The cursor is once again no longer visible.
> 
> This is acting like some of the text in the minibuffer has the
> 'intangible property, but the word "intangible" doesn't appear anywhere
> in lisp/icomplete.el.

I think this has to do with the use of the 'cursor text property in this code in
src/icomplete.el (slightly elided for readability):

(defun icomplete-exhibit ()
  ...
  (when (and icomplete-mode (icomplete-simple-completing-p))
    (save-excursion
      (goto-char (point-max))
                                        ; Insert the match-status information:
      (if (and (> (point-max) (minibuffer-prompt-end))
               buffer-undo-list         ; Wait for some user input.
               ...)
          (let ((text (...)
                (buffer-undo-list t)
                deactivate-mark)
            ;; Do nothing if while-no-input was aborted.
            (when (stringp text)
              (move-overlay icomplete-overlay (point) (point) (current-buffer))
              ;; The current C cursor code doesn't know to use the overlay's
              ;; marker's stickiness to figure out whether to place the cursor
              ;; before or after the string, so let's spoon-feed it the pos.
              (put-text-property 0 1 'cursor t text)
              (overlay-put icomplete-overlay 'after-string text)))))))

Message #11 received at 7474 <at> debbugs.gnu.org (full text, mbox):

From: Eli Zaretskii <eliz <at> gnu.org>
To: flitterio <at> gmail.com (Francis Litterio)
Cc: 7474 <at> debbugs.gnu.org
Subject: Re: bug#7474: In latest source,
	icomplete-mode makes cursor disappear in minibuffer
Date: Wed, 24 Nov 2010 23:16:21 +0200

> From: flitterio <at> gmail.com (Francis Litterio)
> Date: Wed, 24 Nov 2010 14:56:28 -0500
> Cc: 
> 
> Using Emacs built from the latest source on Windows 7, the cursor
> can be made to disappear as follows:

I see it on Windows XP as well.  It's probably my fault, due to the
latest changes in cursor positioning code.  I will take a look in a
couple of days.

Message #16 received at 7474-done <at> debbugs.gnu.org (full text, mbox):

From: Eli Zaretskii <eliz <at> gnu.org>
To: flitterio <at> gmail.com, 7474-done <at> debbugs.gnu.org
Subject: Re: bug#7474: In latest source,
	icomplete-mode makes cursor disappear in minibuffer
Date: Thu, 25 Nov 2010 20:40:18 +0200

> Date: Wed, 24 Nov 2010 23:16:21 +0200
> From: Eli Zaretskii <eliz <at> gnu.org>
> Cc: 7474 <at> debbugs.gnu.org
> 
> > From: flitterio <at> gmail.com (Francis Litterio)
> > Date: Wed, 24 Nov 2010 14:56:28 -0500
> > Cc: 
> > 
> > Using Emacs built from the latest source on Windows 7, the cursor
> > can be made to disappear as follows:
> 
> I see it on Windows XP as well.  It's probably my fault, due to the
> latest changes in cursor positioning code.

As expected, this was due to latest changes in cursor positioning.
Should be fixed now (in revno 102512).  Thanks.

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