(FRAME_X_SCREEN_NUMBER): New macro.

diff --git a/src/xterm.h b/src/xterm.h
index a4fd17ff9c75db0b0c1eb865bb2a5daaf5abfc6f..9751619dd18ddeb7638971fcdb337fb3afbe5b78 100644 (file)
--- a/src/xterm.h
+++ b/src/xterm.h
@@ -611,6 +611,7 @@ struct x_output
 
 /* This is the `Screen *' which frame F is on.  */
 #define FRAME_X_SCREEN(f) (FRAME_X_DISPLAY_INFO (f)->screen)
+#define FRAME_X_SCREEN_NUMBER(f) XScreenNumberOfScreen (FRAME_X_SCREEN (f))
 
 /* This is the Visual which frame F is on.  */
 #define FRAME_X_VISUAL(f) FRAME_X_DISPLAY_INFO (f)->visual