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bug#19413: 24.4; (desktop-save-mode 1) save frame as page and desktop st


From: martin rudalics
Subject: bug#19413: 24.4; (desktop-save-mode 1) save frame as page and desktop sticky (_NET_WM_STATE_STICKY) when close Emacs shaded, (setq desktop-restore-frames nil) fix issue.
Date: Sat, 20 Dec 2014 15:50:14 +0100

> When frame sticky (Fvwm decorate it especially) I get "t". For non-sticky I
> get "nil".

So the value of sticky corresponds to what you see on screen.  Correct?

> I always get normally started Emacs unless I shaded Emacs window. When I close
> shaded Emacs ~/.emacs.desktop changed to:
>
> (setq desktop-saved-frameset [frameset 1 (21653 24375 351017 568000) (desktop . "206") "address@hidden" nil nil ((((font-backend xft x) (font . 
"-Misc-Fixed-normal-normal-normal-*-14-*-*-*-c-70-iso10646-1") (font-parameter . "-misc-fixed-medium-r-normal-*-14-*-*-*-c-*-iso10646-1") (border-width . 0) 
(internal-border-width . 0) (right-divider-width . 0) (bottom-divider-width . 0) (vertical-scroll-bars . right) (foreground-color . "black") (background-color . 
"white") (mouse-color . "black") (border-color . "black") (screen-gamma) (line-spacing) (left-fringe . 10) (right-fringe . 11) (scroll-bar-foreground) 
(scroll-bar-background . "grey75") (menu-bar-lines . 1) (tool-bar-lines . 1) (title) (wait-for-wm . t) (fullscreen) (tool-bar-position . top) (icon-type . t) (auto-raise) 
(auto-lower) (cursor-type . box) (scroll-bar-width . 16) (alpha) (horizontal-scroll-bars . t) (display-type . color) (background-mode . light) (cursor-color . "black") 
(environment) (frameset--id . "A948
-AB72-D73D-287C") (frameset--mini t . t) (modeline . t) (minibuffer . t) (unsplittable) (icon-name) (visibility . t) (display . ":0") (explicit-name) (sticky) (height . 35) (width . 80) (left . 1240) (top . 28)) ((min-height . 8) (min-width . 10) (min-height-ignore . 4) (min-width-ignore . 8) (min-height-safe . 2) (min-width-safe . 2) (min-pixel-height . 112) (min-pixel-width . 70) (min-pixel-height-ignore . 56) (min-pixel-width-ignore . 56) (min-pixel-height-safe . 28) (min-pixel-width-safe . 14)) vc (pixel-width . 597) (pixel-height . 476) (total-width . 85) (total-height . 34) (normal-height . 1.0) (normal-width . 1.0) (combination-limit) (leaf (pixel-width . 597) (pixel-height . 238) (total-width . 85) (total-height . 17) (normal-height . 0.5) (normal-width . 1.0) (buffer "mc.ext" (selected) (hscroll . 0) (fringes 10 11 nil) (margins nil) (scroll-bars 16 3 t nil) (vscroll . 0) (dedicated) (point . 5457) (start . 5293))) (leaf (last . t) (pixel-width . 597) (pixel-height . 238) (total-width . 85) (total-height . 17) (normal-height . 0.5) (normal-width . 1.0) (buffer "*Messages*" (selected . t) (hscroll . 0) (fringes 10 11 nil) (margins nil) (scroll-bars 16 3 t nil) (vscroll . 0) (dedicated) (point . 284) (start . 1)))))])
>
> You can see difference in "(sticky)" above. New "emacs --no-site-file" opened
> as sticky and when I close Emacs ~/.emacs.desktop changed to:
>
> (setq desktop-saved-frameset [frameset 1 (21653 24557 165658 111000) (desktop . "206") "address@hidden" nil nil ((((font-backend xft x) (font . 
"-Misc-Fixed-normal-normal-normal-*-14-*-*-*-c-70-iso10646-1") (font-parameter . "-misc-fixed-medium-r-normal-*-14-*-*-*-c-*-iso10646-1") (border-width . 0) 
(internal-border-width . 0) (right-divider-width . 0) (bottom-divider-width . 0) (vertical-scroll-bars . right) (foreground-color . "black") (background-color . 
"white") (mouse-color . "black") (border-color . "black") (screen-gamma) (line-spacing) (left-fringe . 10) (right-fringe . 11) (scroll-bar-foreground) 
(scroll-bar-background . "grey75") (menu-bar-lines . 1) (tool-bar-lines . 1) (title) (wait-for-wm . t) (fullscreen) (tool-bar-position . top) (icon-type . t) (auto-raise) 
(auto-lower) (cursor-type . box) (scroll-bar-width . 16) (alpha) (horizontal-scroll-bars . t) (display-type . color) (background-mode . light) (cursor-color . "black") 
(environment) (frameset--id . "A948
-AB72-D73D-287C") (frameset--mini t . t) (modeline . t) (minibuffer . t) (unsplittable) (icon-name) (visibility . t) (display . ":0") (explicit-name) (sticky . t) (height . 35) (width . 80) (left . 1240) (top . 28)) ((min-height . 8) (min-width . 10) (min-height-ignore . 4) (min-width-ignore . 8) (min-height-safe . 2) (min-width-safe . 2) (min-pixel-height . 112) (min-pixel-width . 70) (min-pixel-height-ignore . 56) (min-pixel-width-ignore . 56) (min-pixel-height-safe . 28) (min-pixel-width-safe . 14)) vc (pixel-width . 597) (pixel-height . 476) (total-width . 85) (total-height . 34) (normal-height . 1.0) (normal-width . 1.0) (combination-limit) (leaf (pixel-width . 597) (pixel-height . 238) (total-width . 85) (total-height . 17) (normal-height . 0.5) (normal-width . 1.0) (buffer "mc.ext" (selected) (hscroll . 0) (fringes 10 11 nil) (margins nil) (scroll-bars 16 3 t nil) (vscroll . 0) (dedicated) (point . 5457) (start . 5293))) (leaf (last . t) (pixel-width . 597) (pixel-height . 238) (total-width . 85) (total-height . 17) (normal-height . 0.5) (normal-width . 1.0) (buffer "*Messages*" (selected . t) (hscroll . 0) (fringes 10 11 nil) (margins nil) (scroll-bars 16 3 t nil) (vscroll . 0) (dedicated) (point . 284) (start . 1)))))])
>
> You can see difference in "(sticky . t)" above. Next rerun leave
> ~/.emacs.desktop without changes.

To get it right: You first close Emacs with a shaded frame and if you
afterwards look at the desktop file it has (sticky) in it.  If you now
restart Emacs and close it again, the desktop file has (sticky . t).

> So there are two problems:
>
>   1) Emacs instead saving shaded window attribute add "(sticky)" to 
~/.emacs.desktop

So if you do not have a desktop file initially but enable
`desktop-save-mode' and then

(1) close Emacs with a shaded frame, and

(2) close Emacs with an unshaded frame

the difference is a (sticky) entry for (1) and no such entry for (2).
Is that correct?

>   2) (desktop-read) wrongly apply (sticky), and (sticky . t) and (sticky . 
nil)
>   - as always sticky.

This sounds like a reasonable explanation.  x_net_wm_state has

/**   store_frame_param (f, Qsticky, sticky ? Qt : Qnil); **/

without any further comment, maybe it's related.  Does Emacs process

(set-frame-parameter nil 'sticky ...)

correctly on your system without desktop saving involved?

> I check /src/xterm.h:
>
>    /* Atoms dealing with EWMH (i.e. _NET_...) */
>    Atom Xatom_net_wm_state, Xatom_net_wm_state_fullscreen,
>      Xatom_net_wm_state_maximized_horz, Xatom_net_wm_state_maximized_vert,
>      Xatom_net_wm_state_sticky, Xatom_net_wm_state_hidden,
>      Xatom_net_frame_extents,
>      Xatom_net_current_desktop, Xatom_net_workarea;
>
> There are no _NET_WM_STATE_SHADED that defined in:
>
>    
http://standards.freedesktop.org/wm-spec/wm-spec-1.3.html#idm140130317598336
>      _NET_WM_STATE
>
> which say:
>
>    Possible atoms are:
>
>    _NET_WM_STATE_MODAL, ATOM
>    _NET_WM_STATE_STICKY, ATOM
>    _NET_WM_STATE_MAXIMIZED_VERT, ATOM
>    _NET_WM_STATE_MAXIMIZED_HORZ, ATOM
>    _NET_WM_STATE_SHADED, ATOM
>    _NET_WM_STATE_SKIP_TASKBAR, ATOM
>    _NET_WM_STATE_SKIP_PAGER, ATOM
>    _NET_WM_STATE_HIDDEN, ATOM
>    _NET_WM_STATE_FULLSCREEN, ATOM
>    _NET_WM_STATE_ABOVE, ATOM
>    _NET_WM_STATE_BELOW, ATOM
>    _NET_WM_STATE_DEMANDS_ATTENTION, ATOM

We have to possibilities to deal with these: Either we wait for Jan to
return from his voyage or you fix these issues yourself.  Given your
findings above I'm quite confident that you could do it.

martin





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