GNU bug report logs - #18304
24.3.92; Making and using side windows

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Message #8 received at 18304 <at> debbugs.gnu.org (full text, mbox):

From: martin rudalics <rudalics <at> gmx.at>
To: Nicolas Richard <theonewiththeevillook <at> yahoo.fr>, 
 18304 <at> debbugs.gnu.org
Subject: Re: bug#18304: 24.3.92; Making and using side windows
Date: Thu, 21 Aug 2014 11:24:18 +0200

> emacs -q --eval '(display-buffer-in-major-side-window (current-buffer) (quote right) 0)' -f calendar
>
> I get an error:
>
> Debugger entered--Lisp error: (error "Cannot split side window or parent of side window")
>    signal(error ("Cannot split side window or parent of side window"))
>    error("Cannot split side window or parent of side window")
>    byte-code(...)
>    split-window(nil nil)
>    split-window-below()
>    calendar-basic-setup(nil)
>    calendar(nil)
>    call-interactively(calendar record nil)
>    command-execute(calendar record)
>    execute-extended-command(nil "calendar")
>    call-interactively(execute-extended-command nil nil)
>    command-execute(execute-extended-command)
>
> I have no idea if this is a bug

There were at least two bugs here, namely

(1) `calendar-basic-setup' calls `split-window-below' without checking
     whether the selected window can be split at all.

(2) `window-splittable-p' doesn't check whether the argument window is a
    side window.

Both should be fixed with revision 117719 on trunk.

> because I don't know how the user is
> supposed to use/create side windows (see also #18170).

Bugs like the ones you found here should get fixed before promoting side
windows generally.

BTW, if you intend to put the calendar in a side window

emacs -q --eval '(display-buffer-in-major-side-window (current-buffer) (quote bottom) 0)' -f calendar

should look better.

martin

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