Calling 'window-state-get' to store a side window (or a window-tree that
contains a side window) and later calling 'window-state-put' to restore
the window doesn't keep the window's status as a side window. In other
words, the 'window-side' and 'window-slot' window paramters are not
saved and restored by 'window-state-get' and 'window-state-put'.
I found that by adding the window parameters to
'window-persistent-parameters' (details below), then 'window-state-get'
and 'window-state-put' do save and restore the side window's status as a
side window. Doesn't it make sense to add 'window-slot' and
'window-side' to the default value of 'window-persistent-parameters'? Is
there a reason why it's not the case already?
Thanks,
Bar
recipe:
1. emacs -Q
2. evaluate (e.g. with 'M-:'):
(setq mywin (display-buffer (get-buffer-create "buff1")
'(display-buffer-in-side-window (side . left) (slot . 0))))
3. evaluate:
(window-parameter mywin 'window-side)
returned value: left
4. evaluate:
(window-state-put (window-state-get mywin t) mywin)
5. evaluate:
(window-parameter mywin 'window-side)
returned value: nil
expected value: left
The 'window-slot' window-parameter is likewise reset from 0 to nil at
step 4.
How I modified 'window-persistent-parameters' to fix the problem:
(add-to-list 'window-persistent-parameters '(window-side . writable))
(add-to-list 'window-persistent-parameters '(window-slot . writable))
In GNU Emacs 25.0.95.1 (x86_64-unknown-linux-gnu, GTK+ Version 3.18.9)
of 2016-06-27 built on matrix
Windowing system distributor 'The X.Org Foundation', version 11.0.11803000
System Description: Ubuntu 16.04 LTS
Configured features:
XPM JPEG TIFF GIF PNG RSVG IMAGEMAGICK SOUND GPM DBUS GCONF GSETTINGS
NOTIFY ACL LIBSELINUX GNUTLS LIBXML2 FREETYPE M17N_FLT LIBOTF XFT ZLIB
TOOLKIT_SCROLL_BARS GTK3 X11
Important settings:
value of $LC_MONETARY: he_IL.UTF-8
value of $LC_NUMERIC: he_IL.UTF-8
value of $LC_TIME: he_IL.UTF-8
value of $LANG: en_US.UTF-8
value of $XMODIFIERS: @im=ibus
locale-coding-system: utf-8-unix
Major mode: Lisp Interaction
Minor modes in effect:
tooltip-mode: t
global-eldoc-mode: t
electric-indent-mode: t
mouse-wheel-mode: t
tool-bar-mode: t
menu-bar-mode: t
file-name-shadow-mode: t
global-font-lock-mode: t
font-lock-mode: t
blink-cursor-mode: t
auto-composition-mode: t
auto-encryption-mode: t
auto-compression-mode: t
line-number-mode: t
transient-mark-mode: t
Recent messages:
next-line: End of buffer
Mark set
((window-side . writable) (clone-of . t))
((window-slot . writable) (window-side . writable) (clone-of . t))
#<window 8 on buff1>
left
nil
left
Quit [2 times]
Making completion list...
Load-path shadows:
None found.
Features:
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rfc2047 rfc2045 ietf-drums mm-util help-fns help-mode easymenu
cl-loaddefs pcase cl-lib mail-prsvr mail-utils time-date mule-util
tooltip eldoc electric uniquify ediff-hook vc-hooks lisp-float-type
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hashtable-print-readable backquote dbusbind inotify dynamic-setting
system-font-setting font-render-setting move-toolbar gtk x-toolkit x
multi-tty make-network-process emacs)
Memory information:
((conses 16 89002 9010)
(symbols 48 19908 0)
(miscs 40 521 171)
(strings 32 14980 4488)
(string-bytes 1 440881)
(vectors 16 12224)
(vector-slots 8 438921 6034)
(floats 8 168 256)
(intervals 56 219 11)
(buffers 976 13)
(heap 1024 36895 1038))