ecore_x: add API to request selection changed events for diff. wins

we need that in order to get seleciton per window events, which is
required to get a nice mapping onto the ecore_evas object.

Differential Revision: https://phab.enlightenment.org/D11193

src/lib/ecore_x/Ecore_X.h

@@ -2444,6 +2444,14 @@ EAPI void               ecore_x_root_screen_barriers_set(Ecore_X_Rectangle *scre
  */
 EAPI Eina_Bool          ecore_x_fixes_selection_notification_request(Ecore_X_Atom selection);
 
+/**
+ * xfixes selection notification request.
+ *
+ * In addition to ecore_x_fixes_selection_notification_request you can also specify for which window you want to get them
+ */
+EAPI Eina_Bool          ecore_x_fixes_window_selection_notification_request(Ecore_X_Window window, Ecore_X_Atom selection);
+
+
 /* XComposite Extension Support */
 EAPI Eina_Bool          ecore_x_composite_query(void);
 EAPI void               ecore_x_composite_redirect_window(Ecore_X_Window win, Ecore_X_Composite_Update_Type type);

src/lib/ecore_x/ecore_x_fixes.c

@@ -112,6 +112,26 @@ ecore_x_fixes_selection_notification_request(Ecore_X_Atom selection)
    return EINA_FALSE;
 }
 
+EAPI Eina_Bool
+ecore_x_fixes_window_selection_notification_request(Ecore_X_Window window, Ecore_X_Atom selection)
+{
+   EINA_SAFETY_ON_NULL_RETURN_VAL(_ecore_x_disp, EINA_FALSE);
+
+#ifdef ECORE_XFIXES
+   if (_fixes_available)
+     {
+        XFixesSelectSelectionInput (_ecore_x_disp,
+                                    window,
+                                    selection,
+                                    XFixesSetSelectionOwnerNotifyMask |
+                                    XFixesSelectionWindowDestroyNotifyMask |
+                                    XFixesSelectionClientCloseNotifyMask);
+        return EINA_TRUE;
+     }
+#endif
+   return EINA_FALSE;
+}
+
 EAPI Ecore_X_Region
 ecore_x_region_new(Ecore_X_Rectangle *rects,
                    int num)