bug#13426: Frame parameter fullscreen and maximized

[martin rudalics <rudalics@gmx.at>]

Hi Juri

 > 1. On non-GTK builds when the Gnome system key M-f10 maximizes the frame,
 >     Emacs doesn't reflect this change in the frame parameter `fullscreen'.
 >
 >     The test case that demonstrates this problem:
 >
 >     1. emacs -Q
 >     2. Eval (frame-parameter nil 'fullscreen) => nil
 >     3. Maximize the frame using Gnome system keys.
 >     4. Eval (frame-parameter nil 'fullscreen) => nil
 >     5. Maximize the frame using `M-x toggle-frame-maximized RET'
 >     6. Eval (frame-parameter nil 'fullscreen) => 'maximized
 >
 >     Running xprop on the maximized frame outputs:
 >     _NET_WM_STATE(ATOM) = _NET_WM_STATE_MAXIMIZED_VERT, _NET_WM_STATE_MAXIMIZED_HORZ
 >
 > 2. On GTK builds there is another problem: evaluating
 >
 >     (set-frame-parameter nil 'fullscreen 'fullscreen)
 >
 >     modifies the frame parameter `fullscreen' to `fullboth',
 >     not to `fullscreen' as requested.  In this case xprop outputs:
 >     _NET_WM_STATE(ATOM) = _NET_WM_STATE_FULLSCREEN
 >
 >     Second call of (set-frame-parameter nil 'fullscreen 'fullscreen)
 >     modifies the frame parameter `fullscreen' from `fullboth' to `fullscreen'.
 >
 >     So to go to `fullscreen' requires two calls of
 >     (set-frame-parameter nil 'fullscreen 'fullscreen)
 >
 >     Maybe the second problem could be fixed with a patch like below where
 >     `toggle-frame-fullscreen' checks for `fullboth' as an alias for `fullscreen':

Are these issues still valid?  There have been lots of changes in this
area.

martin