>From 84762849c8a34b744ef43314f0870ea31af6214c Mon Sep 17 00:00:00 2001
From: Bernhard R. Link <address@hidden>
Date: Sat, 3 Jan 2009 16:21:34 +0100
Subject: [PATCH] Move screen activation code to new (de)activate_screen functions,
making sure _NET atoms are reset after tmpwm and deleted when exiting.
---
 src/actions.c |    6 ++----
 src/events.c  |   10 ++++++++++
 src/main.c    |    2 ++
 src/screen.c  |   30 ++++++++++++++++++++++++------
 src/screen.h  |    2 ++
 5 files changed, 40 insertions(+), 10 deletions(-)

diff --git a/src/actions.c b/src/actions.c
index ab5162e..731e343 100644
--- a/src/actions.c
+++ b/src/actions.c
@@ -4628,8 +4628,7 @@ cmd_tmpwm (int interactive, struct cmdarg **args)
   for (i=0; i<num_screens; i++)
     {
       XSelectInput(dpy, RootWindow (dpy, screens[i].screen_num), 0);
-      /* Unmap its key window */
-      XUnmapWindow (dpy, screens[i].key_window);
+      deactivate_screen(&screens[i]);
     }
 
   /* Ungrab all our keys. */
@@ -4683,9 +4682,8 @@ cmd_tmpwm (int interactive, struct cmdarg **args)
   } while (tmpwm_error_raised);
   XSetErrorHandler (old_handler);
 
-  /* Map the key windows. */
   for (i=0; i<num_screens; i++)
-    XMapWindow (dpy, screens[i].key_window);
+    activate_screen (&screens[i]);
 
   /* Sort through all the windows in each group and pick out the ones
      that are unmapped or destroyed. */
diff --git a/src/events.c b/src/events.c
index 0e122a2..d973639 100644
--- a/src/events.c
+++ b/src/events.c
@@ -931,11 +931,17 @@ handle_signals (void)
 
   if (rp_exec_newwm)
     {
+      int i;
+
       PRINT_DEBUG (("Switching to %s\n", rp_exec_newwm));
 
       putenv(current_screen()->display_string);
       unhide_all_windows();
       XSync(dpy, False);
+      for (i=0; i<num_screens; i++)
+      {
+	      deactivate_screen(&screens[i]);
+      }
       execlp(rp_exec_newwm, rp_exec_newwm, NULL);
 
       /* Failed. Clean up. */
@@ -943,6 +949,10 @@ handle_signals (void)
       perror(" failed");
       free (rp_exec_newwm);
       rp_exec_newwm = NULL;
+      for (i=0; i<num_screens; i++)
+      {
+	      activate_screen(&screens[i]);
+      }
     }
 
   if (hup_signalled > 0)
diff --git a/src/main.c b/src/main.c
index 540bb6a..0f213c8 100644
--- a/src/main.c
+++ b/src/main.c
@@ -763,6 +763,8 @@ free_screen (rp_screen *s)
       frame_free (s, frame);
     }
 
+  deactivate_screen(s);
+
   XDestroyWindow (dpy, s->bar_window);
   XDestroyWindow (dpy, s->key_window);
   XDestroyWindow (dpy, s->input_window);
diff --git a/src/screen.c b/src/screen.c
index 71a8f50..d978570 100644
--- a/src/screen.c
+++ b/src/screen.c
@@ -270,11 +270,6 @@ init_screen (rp_screen *s, int screen_num)
 	       | StructureNotifyMask);
   XSync (dpy, False);
 
-  /* Add netwm support. FIXME: I think this is busted. */
-  XChangeProperty (dpy, RootWindow (dpy, screen_num),
-		   _net_supported, XA_ATOM, 32, PropModeReplace, 
-		   (unsigned char*)&_net_wm_pid, 1);
-
   /* Set the numset for the frames to our global numset. */
   s->frames_numset = rp_frame_numset;
 
@@ -327,7 +322,6 @@ init_screen (rp_screen *s, int screen_num)
                                        WhitePixel (dpy, s->screen_num),
                                        BlackPixel (dpy, s->screen_num));
   XSelectInput (dpy, s->key_window, KeyPressMask | KeyReleaseMask);
-  XMapWindow (dpy, s->key_window);
 
   /* Create the input window. */
   s->input_window = XCreateSimpleWindow (dpy, s->root, 0, 0, 1, 1,
@@ -344,6 +338,8 @@ init_screen (rp_screen *s, int screen_num)
                                         s->height, 0, s->fg_color, s->bg_color);
   XSelectInput (dpy, s->help_window, KeyPressMask);
 
+  activate_screen(s);
+
   XSync (dpy, 0);
 
 #ifdef USE_XFT_FONT
@@ -370,6 +366,28 @@ init_screen (rp_screen *s, int screen_num)
 #endif
 }
 
+void
+activate_screen (rp_screen *s)
+{
+  /* Add netwm support. FIXME: I think this is busted. */
+  XChangeProperty (dpy, RootWindow (dpy, s->screen_num),
+		   _net_supported, XA_ATOM, 32, PropModeReplace, 
+		   (unsigned char*)&_net_wm_pid, 1);
+
+  XMapWindow (dpy, s->key_window);
+}
+
+void
+deactivate_screen (rp_screen *s)
+{
+  /* Unmap its key window */
+  XUnmapWindow (dpy, s->key_window);
+
+  /* delete everything so noone sees them while we are not there */
+  XDeleteProperty (dpy, RootWindow (dpy, s->screen_num),
+		   _net_supported);
+}
+
 static int
 is_rp_window_for_given_screen (Window w, rp_screen *s)
 {
diff --git a/src/screen.h b/src/screen.h
index d83ba4b..6bad555 100644
--- a/src/screen.h
+++ b/src/screen.h
@@ -36,6 +36,8 @@ rp_frame *screen_get_frame (rp_screen *s, int frame_num);
 rp_frame *screen_find_frame_by_frame (rp_screen *s, rp_frame *f);
 
 void init_screens (int screen_arg, int screen_num);
+void activate_screen (rp_screen *s);
+void deactivate_screen (rp_screen *s);
 
 int is_rp_window_for_screen (Window w, rp_screen *s);
 int is_a_root_window (unsigned int w);
-- 
1.4.4.4