Added optimization to drag of shaped windows where xor of dimensions …

…of shaped

windows is taken to determine delta of size in further determination of
whether or not to call jbwm_set_shape().  Such is still called frequently on
shaped window resize however.  This required adding field szsum to
JBWMClient.h.

JBWMClient.h

@@ -17,9 +17,10 @@ struct JBWMClient {
 	Window window, parent;
 	struct JBWMClientOptions opt;
 	struct JBWMRectangle size, old_size, before_fullscreen;
+	uint16_t szsum; // used to check size changes for shape setting
 	uint8_t screen;
 	uint8_t vdesk;
 	int8_t ignore_unmap;
-	int8_t __pad[3];
+	int8_t __pad[1];
 };
 #endif /* JBWM_CLIENT_STRUCT_H */

ewmh.c

@@ -73,9 +73,11 @@ static int get_client_list_r(Window ** list, Display * d,
 #ifdef DEBUG
 static void debug_window_list(int n, Window * window_list)
 {
-	JBWM_LOG("get_*_client_list(n is %d", n);
-	while (--n >= 0)
-		JBWM_LOG("\t[n is %d] window %d", n, (int)window_list[n]);
+	if (n >= 0) {
+		JBWM_LOG("window_list[%d] is 0x%x",
+			n, (int)window_list[n]);
+		debug_window_list(n - 1, window_list);
+	}
 }
 #else//!DEBUG
 #define debug_window_list(n, w)

ewmh.scm

@@ -33,8 +33,8 @@
      (begin-array-definition "char *" "jbwm_atom_names" outf)
      (print-all print-each-array-element outf)
      (end-c-definition outf)
-     (display (string-append "\tXInternAtoms(d, jbwm_atom_names,"
-	       " JBWM_EWMH_ATOMS_COUNT,\n\t\tfalse, jbwm_ewmh);\n}") outf)
+     (display "\tXInternAtoms(d, jbwm_atom_names, " outf)
+     (display "JBWM_EWMH_ATOMS_COUNT,\n\t\tfalse, jbwm_ewmh);\n}\n") outf)
      (close-port outf))))
   ; Generate "ewmh_allowed.c"
   (write-jbwm-ewmh-allowed-c

move_resize.c

@@ -39,8 +39,13 @@ void jbwm_move_resize(struct JBWMClient * restrict c)
 		jbwm_handle_mwm_hints(c);
 		jbwm_update_title_bar(c);
 	} // Skip shaped and fullscreen clients.
-	do_move(c->display, c->parent, c->window, &c->size, offset);
-	jbwm_set_shape(c);
+	struct JBWMRectangle * restrict s = &c->size;
+	do_move(c->display, c->parent, c->window, s, offset);
+	uint16_t szsum = s->width ^ s->height;
+	if (szsum != c->szsum) {
+		c->szsum = szsum;
+		jbwm_set_shape(c);
+	}
 	jbwm_configure_client(c);
 }