[!TARGET_API_MAC_CARBON] Include Displays.h.

(mac_screen_config_changed): New variable.
(mac_handle_dm_notification, init_dm_notification_handler)
(mac_get_screen_info): New functions.
[MAC_OS8] (main): Call init_dm_notification_handler.
(mac_initialize) [MAC_OSX]: Likewise.
(XTread_socket): Call mac_get_screen_info if screen config changed.
(mac_initialized): Make static.
(mac_initialize_display_info): Remove function.
(mac_term_init): Call mac_get_screen_info.  Add partial contents of
mac_initialize_display_info.

1 files changed, 127 insertions, 88 deletions

diff --git a/src/macterm.c b/src/macterm.c
index 9d190a3e4f6..bee1af5ab71 100644
--- a/src/macterm.c
+++ b/src/macterm.c
@@ -52,6 +52,7 @@ Boston, MA 02110-1301, USA.  */
 #include <LowMem.h>
 #include <Controls.h>
 #include <Windows.h>
+#include <Displays.h>
 #if defined (__MRC__) || (__MSL__ >= 0x6000)
 #include <ControlDefinitions.h>
 #endif
@@ -8869,6 +8870,9 @@ int mac_pass_control_to_system;
    Carbon/Apple event handlers.  */
 static struct input_event *read_socket_inev = NULL;
 
+/* Whether or not the screen configuration has changed.  */
+static int mac_screen_config_changed = 0;
+
 Point saved_menu_event_location;
 
 /* Apple Events */
@@ -10399,6 +10403,87 @@ remove_window_handler (window)
 }
 
 
+static pascal void
+mac_handle_dm_notification (event)
+     AppleEvent *event;
+{
+  mac_screen_config_changed = 1;
+}
+
+static OSErr
+init_dm_notification_handler ()
+{
+  OSErr err;
+  static DMNotificationUPP handle_dm_notificationUPP = NULL;
+  ProcessSerialNumber psn;
+
+  if (handle_dm_notificationUPP == NULL)
+    handle_dm_notificationUPP =
+      NewDMNotificationUPP (mac_handle_dm_notification);
+
+  err = GetCurrentProcess (&psn);
+  if (err == noErr)
+    err = DMRegisterNotifyProc (handle_dm_notificationUPP, &psn);
+
+  return err;
+}
+
+static void
+mac_get_screen_info (dpyinfo)
+     struct mac_display_info *dpyinfo;
+{
+#ifdef MAC_OSX
+  /* HasDepth returns true if it is possible to have a 32 bit display,
+     but this may not be what is actually used.  Mac OSX can do better.  */
+  dpyinfo->color_p = CGDisplaySamplesPerPixel (kCGDirectMainDisplay) > 1;
+  dpyinfo->n_planes = CGDisplayBitsPerPixel (kCGDirectMainDisplay);
+  {
+    CGDisplayErr err;
+    CGDisplayCount ndisps;
+    CGDirectDisplayID *displays;
+
+    err = CGGetActiveDisplayList (0, NULL, &ndisps);
+    if (err == noErr)
+      {
+        displays = alloca (sizeof (CGDirectDisplayID) * ndisps);
+        err = CGGetActiveDisplayList (ndisps, displays, &ndisps);
+      }
+    if (err == noErr)
+      {
+        CGRect bounds = CGRectZero;
+
+        while (ndisps-- > 0)
+          bounds = CGRectUnion (bounds, CGDisplayBounds (displays[ndisps]));
+        dpyinfo->height = CGRectGetHeight (bounds);
+        dpyinfo->width = CGRectGetWidth (bounds);
+      }
+    else
+      {
+        dpyinfo->height = CGDisplayPixelsHigh (kCGDirectMainDisplay);
+        dpyinfo->width = CGDisplayPixelsWide (kCGDirectMainDisplay);
+      }
+  }
+#else  /* !MAC_OSX */
+  {
+    GDHandle gdh = GetMainDevice ();
+    Rect rect = (**gdh).gdRect;
+
+    dpyinfo->color_p = TestDeviceAttribute (gdh, gdDevType);
+    for (dpyinfo->n_planes = 32; dpyinfo->n_planes > 0; dpyinfo->n_planes >>= 1)
+      if (HasDepth (gdh, dpyinfo->n_planes, gdDevType, dpyinfo->color_p))
+        break;
+
+    for (gdh = DMGetFirstScreenDevice (dmOnlyActiveDisplays); gdh;
+         gdh = DMGetNextScreenDevice (gdh, dmOnlyActiveDisplays))
+      UnionRect (&rect, &(**gdh).gdRect, &rect);
+
+    dpyinfo->height = rect.bottom - rect.top;
+    dpyinfo->width = rect.right - rect.left;
+  }
+#endif  /* !MAC_OSX */
+}
+
+
 #if __profile__
 void
 profiler_exit_proc ()
@@ -10456,6 +10541,8 @@ main (void)
 
   init_apple_event_handler ();
 
+  init_dm_notification_handler ();
+
   {
     char **argv;
     int argc = 0;
@@ -11377,6 +11464,12 @@ XTread_socket (sd, expected, hold_quit)
       pending_autoraise_frame = 0;
     }
 
+  if (mac_screen_config_changed)
+    {
+      mac_get_screen_info (dpyinfo);
+      mac_screen_config_changed = 0;
+    }
+
 #if !USE_CARBON_EVENTS
   /* Check which frames are still visible.  We do this here because
      there doesn't seem to be any direct notification from the Window
@@ -11511,92 +11604,7 @@ make_mac_terminal_frame (struct frame *f)
                             Initialization
  ***********************************************************************/
 
-int mac_initialized = 0;
-
-void
-mac_initialize_display_info ()
-{
-  struct mac_display_info *dpyinfo = &one_mac_display_info;
-
-  bzero (dpyinfo, sizeof (*dpyinfo));
-
-#ifdef MAC_OSX
-  dpyinfo->mac_id_name
-    = (char *) xmalloc (SCHARS (Vinvocation_name)
-                        + SCHARS (Vsystem_name)
-                        + 2);
-  sprintf (dpyinfo->mac_id_name, "%s@%s",
-           SDATA (Vinvocation_name), SDATA (Vsystem_name));
-#else
-  dpyinfo->mac_id_name = (char *) xmalloc (strlen ("Mac Display") + 1);
-  strcpy (dpyinfo->mac_id_name, "Mac Display");
-#endif
-
-  dpyinfo->reference_count = 0;
-  dpyinfo->resx = 72.0;
-  dpyinfo->resy = 72.0;
-#ifdef MAC_OSX
-  /* HasDepth returns true if it is possible to have a 32 bit display,
-     but this may not be what is actually used.  Mac OSX can do better.  */
-  dpyinfo->color_p = CGDisplaySamplesPerPixel (kCGDirectMainDisplay) > 1;
-  dpyinfo->n_planes = CGDisplayBitsPerPixel (kCGDirectMainDisplay);
-  {
-    CGDisplayErr err;
-    CGDisplayCount ndisps;
-    CGDirectDisplayID *displays;
-
-    err = CGGetActiveDisplayList (0, NULL, &ndisps);
-    if (err == noErr)
-      {
-        displays = alloca (sizeof (CGDirectDisplayID) * ndisps);
-        err = CGGetActiveDisplayList (ndisps, displays, &ndisps);
-      }
-    if (err == noErr)
-      {
-        CGRect bounds = CGRectZero;
-
-        while (ndisps-- > 0)
-          bounds = CGRectUnion (bounds, CGDisplayBounds (displays[ndisps]));
-        dpyinfo->height = CGRectGetHeight (bounds);
-        dpyinfo->width = CGRectGetWidth (bounds);
-      }
-    else
-      {
-        dpyinfo->height = CGDisplayPixelsHigh (kCGDirectMainDisplay);
-        dpyinfo->width = CGDisplayPixelsWide (kCGDirectMainDisplay);
-      }
-  }
-#else
-  {
-    GDHandle gdh = GetMainDevice ();
-    Rect rect = (**gdh).gdRect;
-
-    dpyinfo->color_p = TestDeviceAttribute (gdh, gdDevType);
-    for (dpyinfo->n_planes = 32; dpyinfo->n_planes > 0; dpyinfo->n_planes >>= 1)
-      if (HasDepth (gdh, dpyinfo->n_planes, gdDevType, dpyinfo->color_p))
-        break;
-
-    for (gdh = GetDeviceList (); gdh; gdh = GetNextDevice (gdh))
-      if (TestDeviceAttribute (gdh, screenDevice)
-          && TestDeviceAttribute (gdh, screenActive))
-        UnionRect (&rect, &(**gdh).gdRect, &rect);
-
-    dpyinfo->height = rect.bottom - rect.top;
-    dpyinfo->width = rect.right - rect.left;
-  }
-#endif
-  dpyinfo->grabbed = 0;
-  dpyinfo->root_window = NULL;
-  dpyinfo->image_cache = make_image_cache ();
-
-  dpyinfo->mouse_face_beg_row = dpyinfo->mouse_face_beg_col = -1;
-  dpyinfo->mouse_face_end_row = dpyinfo->mouse_face_end_col = -1;
-  dpyinfo->mouse_face_face_id = DEFAULT_FACE_ID;
-  dpyinfo->mouse_face_window = Qnil;
-  dpyinfo->mouse_face_overlay = Qnil;
-  dpyinfo->mouse_face_hidden = 0;
-}
-
+static int mac_initialized = 0;
 
 static XrmDatabase
 mac_make_rdb (xrm_option)
@@ -11630,9 +11638,37 @@ mac_term_init (display_name, xrm_option, resource_name)
   if (x_display_list)
     error ("Sorry, this version can only handle one display");
 
-  mac_initialize_display_info ();
-
   dpyinfo = &one_mac_display_info;
+  bzero (dpyinfo, sizeof (*dpyinfo));
+
+#ifdef MAC_OSX
+  dpyinfo->mac_id_name
+    = (char *) xmalloc (SCHARS (Vinvocation_name)
+                        + SCHARS (Vsystem_name)
+                        + 2);
+  sprintf (dpyinfo->mac_id_name, "%s@%s",
+           SDATA (Vinvocation_name), SDATA (Vsystem_name));
+#else
+  dpyinfo->mac_id_name = (char *) xmalloc (strlen ("Mac Display") + 1);
+  strcpy (dpyinfo->mac_id_name, "Mac Display");
+#endif
+
+  dpyinfo->reference_count = 0;
+  dpyinfo->resx = 72.0;
+  dpyinfo->resy = 72.0;
+
+  mac_get_screen_info (dpyinfo);
+
+  dpyinfo->grabbed = 0;
+  dpyinfo->root_window = NULL;
+  dpyinfo->image_cache = make_image_cache ();
+
+  dpyinfo->mouse_face_beg_row = dpyinfo->mouse_face_beg_col = -1;
+  dpyinfo->mouse_face_end_row = dpyinfo->mouse_face_end_col = -1;
+  dpyinfo->mouse_face_face_id = DEFAULT_FACE_ID;
+  dpyinfo->mouse_face_window = Qnil;
+  dpyinfo->mouse_face_overlay = Qnil;
+  dpyinfo->mouse_face_hidden = 0;
 
   dpyinfo->xrdb = mac_make_rdb (xrm_option);
 
@@ -11650,6 +11686,7 @@ mac_term_init (display_name, xrm_option, resource_name)
 
   return dpyinfo;
 }
+
 /* Get rid of display DPYINFO, assuming all frames are already gone.  */
 
 void
@@ -11869,6 +11906,8 @@ mac_initialize ()
 
   init_apple_event_handler ();
 
+  init_dm_notification_handler ();
+
   if (!inhibit_window_system)
     {
       static const ProcessSerialNumber psn = {0, kCurrentProcess};