[debbugs-tracker] bug#11464: closed (24.1.50; pos-visible-in-window-p returns a false positive with bidi text)

[GNU bug Tracking System]

Your message dated Sun, 13 May 2012 21:26:03 +0300
with message-id <address@hidden>
and subject line Re: bug#11464: 24.1.50; pos-visible-in-window-p returns a 
false positive with bidi text
has caused the debbugs.gnu.org bug report #11464,
regarding 24.1.50; pos-visible-in-window-p returns a false positive with bidi 
text
to be marked as done.

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-- 
11464: http://debbugs.gnu.org/cgi/bugreport.cgi?bug=11464
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> --- Begin Message ---
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> Subject: 
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> 24.1.50;	pos-visible-in-window-p returns a false positive with bidi text
>
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> Date: 
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> Sun, 13 May 2012 18:54:59 +0300
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>
>
>
> The following code shows a problem with pos-visible-in-window-p
> and bidirectional text. When there are right-to-left characters
> at the beginning of the buffer, the function returns nil, as the
> last line is not visible. However, when "a" is inserted into the
> beginning of the buffer, the function returns t, which is
> incorrect.
>
> The bug happens in trunk and emacs-24, but not in emacs-23, so it
> could be considered as a regression ;-)
>
>
> (let (before after)
>   (pop-to-buffer (get-buffer-create "test"))
>   (erase-buffer)
>
>   (dotimes (i (* 2 (window-height)))
>     (insert "\u05d0\n"))                ; HEBREW LETTER ALEF
>   (insert "Last line\n")
>   (goto-char (point-min))
>
>   (setq before (pos-visible-in-window-p (point-max)))
>
>   (insert "a")
>   (setq after (pos-visible-in-window-p (point-max)))
>   (message "Visible: before: %S, after: %S" before after))
>
>
> In GNU Emacs 24.1.50.8 (x86_64-unknown-linux-gnu, GTK+ Version 3.4.1)
>  of 2012-05-13 on arirop
> Bzr revision: 108213 address@hidden
> Windowing system distributor `Fedora Project', version 11.0.11200000
> Configured using:
>  `configure '--with-x-toolkit=gtk3''
>
> -- 
> Ari Roponen
>
>
>
> --- End Message ---
> --- Begin Message ---
>
>
>
> Subject: 
>
> Re: bug#11464: 24.1.50;	pos-visible-in-window-p returns a false positive with bidi text
>
>
>
>
> Date: 
>
> Sun, 13 May 2012 21:26:03 +0300
>
>
>
>
> > From: Ari Roponen <address@hidden>
> > Date: Sun, 13 May 2012 18:54:59 +0300
> > 
> > The following code shows a problem with pos-visible-in-window-p
> > and bidirectional text. When there are right-to-left characters
> > at the beginning of the buffer, the function returns nil, as the
> > last line is not visible. However, when "a" is inserted into the
> > beginning of the buffer, the function returns t, which is
> > incorrect.
>
> Sigh... where are you guys on weekends, when I _really_ have time to
> work on Emacs?...
>
> > The bug happens in trunk and emacs-24, but not in emacs-23, so it
> > could be considered as a regression ;-)
>
> Nothing that's related to R2L text in a left-to-right paragraph can
> ever be a regression wrt Emacs 23.
>
> But since the fix is quite simple, here you go: fixed in revision
> 107994 on the emacs-24 branch.
>
> Thanks.
>
>
> --- End Message ---