Have overlays with window property respect clone numbers.

* buffer.c (Qclone_number): Declare static and DEFSYM it.
(sort_overlays, overlay_strings): When an overlay's clone number
matches the window's clone number process the overlay even if
the overlay's window property doesn't match the current window.

2 files changed, 24 insertions, 6 deletions

diff --git a/src/ChangeLog b/src/ChangeLog
index 8a25b736cd2..56ffc1036d5 100644
--- a/src/ChangeLog
+++ b/src/ChangeLog
@@ -1,3 +1,10 @@
+2011-06-27  Martin Rudalics  <rudalics@gmx.at>
+
+	* buffer.c (Qclone_number): Declare static and DEFSYM it.
+	(sort_overlays, overlay_strings): When an overlay's clone number
+	matches the window's clone number process the overlay even if
+	the overlay's window property doesn't match the current window.
+
 2011-06-26  Jan Djärv  <jan.h.d@swipnet.se>
 
 	* emacsgtkfixed.h: State that this is only used with Gtk+3.
diff --git a/src/buffer.c b/src/buffer.c
index 006153b0424..328963be78c 100644
--- a/src/buffer.c
+++ b/src/buffer.c
@@ -146,7 +146,7 @@ static Lisp_Object Qoverlayp;
 
 Lisp_Object Qpriority, Qbefore_string, Qafter_string;
 
-static Lisp_Object Qevaporate;
+static Lisp_Object Qclone_number, Qevaporate;
 
 Lisp_Object Qmodification_hooks;
 Lisp_Object Qinsert_in_front_hooks;
@@ -2900,10 +2900,13 @@ sort_overlays (Lisp_Object *overlay_vec, ptrdiff_t noverlays, struct window *w)
 	     overlays that are limited to some other window.  */
 	  if (w)
 	    {
-	      Lisp_Object window;
+	      Lisp_Object window, clone_number;
 
 	      window = Foverlay_get (overlay, Qwindow);
-	      if (WINDOWP (window) && XWINDOW (window) != w)
+	      clone_number = Foverlay_get (overlay, Qclone_number);
+	      if (WINDOWP (window) && XWINDOW (window) != w
+		  && (! NUMBERP (clone_number)
+		      || XFASTINT (clone_number) != XFASTINT (w->clone_number)))
 		continue;
 	    }
 
@@ -3032,7 +3035,7 @@ record_overlay_string (struct sortstrlist *ssl, Lisp_Object str,
 EMACS_INT
 overlay_strings (EMACS_INT pos, struct window *w, unsigned char **pstr)
 {
-  Lisp_Object overlay, window, str;
+  Lisp_Object overlay, window, clone_number, str;
   struct Lisp_Overlay *ov;
   EMACS_INT startpos, endpos;
   int multibyte = ! NILP (BVAR (current_buffer, enable_multibyte_characters));
@@ -3051,8 +3054,12 @@ overlay_strings (EMACS_INT pos, struct window *w, unsigned char **pstr)
       if (endpos != pos && startpos != pos)
 	continue;
       window = Foverlay_get (overlay, Qwindow);
-      if (WINDOWP (window) && XWINDOW (window) != w)
+      clone_number = Foverlay_get (overlay, Qclone_number);
+      if (WINDOWP (window) && XWINDOW (window) != w
+	  && (! NUMBERP (clone_number)
+	      || XFASTINT (clone_number) != XFASTINT (w->clone_number)))
 	continue;
+
       if (startpos == pos
 	  && (str = Foverlay_get (overlay, Qbefore_string), STRINGP (str)))
 	record_overlay_string (&overlay_heads, str,
@@ -3079,7 +3086,10 @@ overlay_strings (EMACS_INT pos, struct window *w, unsigned char **pstr)
       if (endpos != pos && startpos != pos)
 	continue;
       window = Foverlay_get (overlay, Qwindow);
-      if (WINDOWP (window) && XWINDOW (window) != w)
+      clone_number = Foverlay_get (overlay, Qclone_number);
+      if (WINDOWP (window) && XWINDOW (window) != w
+	  && (! NUMBERP (clone_number)
+	      || XFASTINT (clone_number) != XFASTINT (w->clone_number)))
 	continue;
       if (startpos == pos
 	  && (str = Foverlay_get (overlay, Qbefore_string), STRINGP (str)))
@@ -5219,6 +5229,7 @@ syms_of_buffer (void)
   DEFSYM (Qinsert_behind_hooks, "insert-behind-hooks");
   DEFSYM (Qget_file_buffer, "get-file-buffer");
   DEFSYM (Qpriority, "priority");
+  DEFSYM (Qclone_number, "clone-number");
   DEFSYM (Qbefore_string, "before-string");
   DEFSYM (Qafter_string, "after-string");
   DEFSYM (Qfirst_change_hook, "first-change-hook");