Add support for fullscreen values fullheight and fullwidth on PGTK

* src/pgtkterm.c (window_state_event): Support values fullheight and
fullwidth for the fullscreen frame-parameter
* doc/lispref/frames.texi (Size Parameters): Document inability to
actively set hullheight/fullwidth for PGTK frames
* configure.ac: Bump GTK version for PGTK
* etc/NEWS: Change GTK version in PGTK announcement

4 files changed, 30 insertions, 20 deletions

diff --git a/configure.ac b/configure.ac
index ad3df5d7312..a016d464f34 100644
--- a/configure.ac
+++ b/configure.ac
@@ -2866,7 +2866,7 @@ if test "${opsys}" != "mingw32"; then
     if test "${window_system}" = "x11"; then
       GTK_REQUIRED=3.10
     else
-      GTK_REQUIRED=3.20
+      GTK_REQUIRED=3.22.23
     fi
     GTK_MODULES="gtk+-3.0 >= $GTK_REQUIRED glib-2.0 >= $GLIB_REQUIRED"
 
diff --git a/doc/lispref/frames.texi b/doc/lispref/frames.texi
index f655ccdfa73..ed56fa777d2 100644
--- a/doc/lispref/frames.texi
+++ b/doc/lispref/frames.texi
@@ -1746,15 +1746,16 @@ 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}.  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
-available screen space.
+@code{fullboth}, or @code{maximized}.@footnote{On PGTK frames, setting
+the values @code{fullheight} and @code{fullwidth} has no effect.}  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 available screen space.
 
 Full-height and full-width frames are more similar to maximized
 frames in this regard.  However, these typically display an external
diff --git a/etc/NEWS b/etc/NEWS
index 3d679fdec6f..3836efa6927 100644
--- a/etc/NEWS
+++ b/etc/NEWS
@@ -85,7 +85,7 @@ after deleting lisp/leim/ja-dic/ja-dic.el.
 
 +++
 ** Emacs now supports being built with pure GTK.
-To use this option, make sure the GTK 3 (version 3.20 or later) and
+To use this option, make sure the GTK 3 (version 3.22.23 or later) and
 Cairo development files are installed, and configure Emacs with the
 option '--with-pgtk'.  Unlike the default X and GTK build, the
 resulting Emacs binary will work on any underlying window system
diff --git a/src/pgtkterm.c b/src/pgtkterm.c
index 1eb4d378adf..b283cef7cde 100644
--- a/src/pgtkterm.c
+++ b/src/pgtkterm.c
@@ -5454,15 +5454,18 @@ window_state_event (GtkWidget *widget,
                     gpointer *user_data)
 {
   struct frame *f = pgtk_any_window_to_frame (event->window_state.window);
+  GdkWindowState new_state;
   union buffered_input_event inev;
 
+  new_state = event->window_state.new_window_state;
+
   EVENT_INIT (inev.ie);
   inev.ie.kind = NO_EVENT;
   inev.ie.arg = Qnil;
 
   if (f)
     {
-      if (event->window_state.new_window_state & GDK_WINDOW_STATE_FOCUSED)
+      if (new_state & GDK_WINDOW_STATE_FOCUSED)
         {
           if (FRAME_ICONIFIED_P (f))
             {
@@ -5478,17 +5481,24 @@ window_state_event (GtkWidget *widget,
         }
     }
 
-  if (event->window_state.new_window_state
-      & GDK_WINDOW_STATE_FULLSCREEN)
+  if (new_state & GDK_WINDOW_STATE_FULLSCREEN)
     store_frame_param (f, Qfullscreen, Qfullboth);
-  else if (event->window_state.new_window_state
-           & GDK_WINDOW_STATE_MAXIMIZED)
+  else if (new_state & GDK_WINDOW_STATE_MAXIMIZED)
     store_frame_param (f, Qfullscreen, Qmaximized);
+  else if ((new_state & GDK_WINDOW_STATE_TOP_TILED)
+           && (new_state & GDK_WINDOW_STATE_BOTTOM_TILED)
+           && !(new_state & GDK_WINDOW_STATE_TOP_RESIZABLE)
+           && !(new_state & GDK_WINDOW_STATE_BOTTOM_RESIZABLE))
+    store_frame_param (f, Qfullscreen, Qfullheight);
+  else if ((new_state & GDK_WINDOW_STATE_LEFT_TILED)
+           && (new_state & GDK_WINDOW_STATE_RIGHT_TILED)
+           && !(new_state & GDK_WINDOW_STATE_LEFT_RESIZABLE)
+           && !(new_state & GDK_WINDOW_STATE_RIGHT_RESIZABLE))
+    store_frame_param (f, Qfullscreen, Qfullwidth);
   else
     store_frame_param (f, Qfullscreen, Qnil);
 
-  if (event->window_state.new_window_state
-      & GDK_WINDOW_STATE_ICONIFIED)
+  if (new_state & GDK_WINDOW_STATE_ICONIFIED)
     SET_FRAME_ICONIFIED (f, true);
   else
     {
@@ -5498,8 +5508,7 @@ window_state_event (GtkWidget *widget,
       SET_FRAME_ICONIFIED (f, false);
     }
 
-  if (event->window_state.new_window_state
-      & GDK_WINDOW_STATE_STICKY)
+  if (new_state & GDK_WINDOW_STATE_STICKY)
     store_frame_param (f, Qsticky, Qt);
   else
     store_frame_param (f, Qsticky, Qnil);