GNU bug report logs - #17942
24.3.92; pos-visible-in-window-p with PARTIALLY is wrong for the first row only containing a single image

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From: help-debbugs <at> gnu.org (GNU bug Tracking System)
To: YAMAMOTO Mitsuharu <mituharu <at> math.s.chiba-u.ac.jp>
Subject: bug#17942: closed (Re: bug#17942: 24.3.92; pos-visible-in-window-p
 with PARTIALLY is wrong for the first row	only containing a single image)
Date: Sat, 05 Jul 2014 07:41:03 +0000

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Your bug report

#17942: 24.3.92; pos-visible-in-window-p with PARTIALLY is wrong for the first row only containing a single image

which was filed against the emacs package, has been closed.

The explanation is attached below, along with your original report.
If you require more details, please reply to 17942 <at> debbugs.gnu.org.

-- 
17942: http://debbugs.gnu.org/cgi/bugreport.cgi?bug=17942
GNU Bug Tracking System
Contact help-debbugs <at> gnu.org with problems

[Message part 2 (message/rfc822, inline)]

From: Eli Zaretskii <eliz <at> gnu.org>
To: YAMAMOTO Mitsuharu <mituharu <at> math.s.chiba-u.ac.jp>
Cc: 17942-done <at> debbugs.gnu.org
Subject: Re: bug#17942: 24.3.92;
 pos-visible-in-window-p with PARTIALLY is wrong for the first
 row	only containing a single image
Date: Sat, 05 Jul 2014 10:39:59 +0300

> Date: Sat, 05 Jul 2014 08:38:26 +0900
> From: YAMAMOTO Mitsuharu <mituharu <at> math.s.chiba-u.ac.jp>
> 
> 1. $ emacs -Q &
> 2. Type the following expression and hit C-j in the *scratch* buffer.
> 
>   (save-excursion
>     (goto-char (point-min))
>     (insert-image (create-image "splash.png"))
>     (insert ?\n))
> 
> 3. Ditto.
> 
>    (pos-visible-in-window-p (point-min) nil t)
> 
> Result:
> 
> The expected one is (0 0), but the actual one is (608 188).  As far as
> I tested, this happens at the first row (i.e., (window-start)) only
> containing a single image.  If you remove (insert ?\n) in the first
> expression, then the result is (0 0) as expected.

Fixed in revision 117352 on the emacs-24 branch.

[Message part 3 (message/rfc822, inline)]

From: YAMAMOTO Mitsuharu <mituharu <at> math.s.chiba-u.ac.jp>
To: bug-gnu-emacs <at> gnu.org
Subject: 24.3.92; pos-visible-in-window-p with PARTIALLY is wrong for
 the first row only containing a single image
Date: Sat, 05 Jul 2014 08:38:26 +0900

Steps to reproduce:

1. $ emacs -Q &
2. Type the following expression and hit C-j in the *scratch* buffer.

  (save-excursion
    (goto-char (point-min))
    (insert-image (create-image "splash.png"))
    (insert ?\n))

3. Ditto.

   (pos-visible-in-window-p (point-min) nil t)

Result:

The expected one is (0 0), but the actual one is (608 188).  As far as
I tested, this happens at the first row (i.e., (window-start)) only
containing a single image.  If you remove (insert ?\n) in the first
expression, then the result is (0 0) as expected.

				     YAMAMOTO Mitsuharu
				mituharu <at> math.s.chiba-u.ac.jp

In GNU Emacs 24.3.92.1 (x86_64-apple-darwin13.2.0, GTK+ Version 3.12.2)
 of 2014-07-05 on YAMAMOTO-no-iMac.local
Repository revision: 117350 stephen.berman <at> gmx.net-20140704190929-xpf743kwesgh2k4q
Windowing system distributor `The X.Org Foundation', version 11.0.11406000
Configured using:
 `configure --without-imagemagick LDFLAGS=-L/opt/local/lib
 CPPFLAGS=-I/opt/local/include'

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