Fix race conditions processing frame fullscreen state on Haiku

* doc/lispref/frames.texi (Size Parameters): Remove note saying
Haiku doesn't support `fullwidth' and `fullboth'.

* src/haiku_support.cc (subset_windows, class EmacsWindow)
(Unparent, ParentTo): Stop calling old fullscreen functions.
(ClearFullscreen, FullscreenRectForMode, SetFullscreen): New
functions.  Completely rewrite old zoom and fullscreen handling
code.
(Zoom): Send a ZOOM_EVENT and don't actually zoom.
(BWindow_zoom, EmacsWindow_make_fullscreen, EmacsWindow_unzoom):
Delete functions.
(be_set_window_fullscreen_mode): New function.

* src/haiku_support.h (struct haiku_zoom_event): Remove
`zoomed_p' parameter.
(enum haiku_fullscreen_mode): New enum.  Update prototypes.

* src/haikufns.c (Fx_display_pixel_height): Return height
instead of width.

* src/haikuterm.c (haiku_make_fullscreen_consistent)
(haiku_read_socket, haiku_fullscreen): Adjust to always set zoom
and fullscreen in the main thread instead of the UI threads.

* src/haikuterm.h (struct haiku_output): Remove flag `zoomed_p'
and add field `fullscreen_mode'.

1 files changed, 6 insertions, 8 deletions

diff --git a/doc/lispref/frames.texi b/doc/lispref/frames.texi
index 5853c45b79e..5ea060871f4 100644
--- a/doc/lispref/frames.texi
+++ b/doc/lispref/frames.texi
@@ -1734,16 +1734,14 @@ fit will be clipped by the window manager.
 @item fullscreen
 This parameter specifies whether to maximize the frame's width, height
 or both.  Its value can be @code{fullwidth}, @code{fullheight},
-@code{fullboth}, or @code{maximized}.@footnote{On Haiku, setting
-@code{fullscreen} to @code{fullwidth} or @code{fullheight} has no
-effect.}  A @dfn{fullwidth} frame is as
+@code{fullboth}, or @code{maximized}.  A @dfn{fullwidth} frame is as
 wide as possible, a @dfn{fullheight} frame is as tall as possible, and
 a @dfn{fullboth} frame is both as wide and as tall as possible.  A
-@dfn{maximized} frame is like a ``fullboth'' frame, except that it usually
-keeps its title bar and the buttons for resizing
-and closing the frame.  Also, maximized frames typically avoid hiding
-any task bar or panels displayed on the desktop.  A ``fullboth'' frame,
-on the other hand, usually omits the title bar and occupies the entire
+@dfn{maximized} frame is like a ``fullboth'' frame, except that it
+usually keeps its title bar and the buttons for resizing and closing
+the frame.  Also, maximized frames typically avoid hiding any task bar
+or panels displayed on the desktop.  A ``fullboth'' frame, on the
+other hand, usually omits the title bar and occupies the entire
 available screen space.
 
 Full-height and full-width frames are more similar to maximized