DnD/Wl: fix drop sequence when drop is done on a bad target.

The problem occurs when no drop target below the mouse can receive the
data type provided and the mouse button is released. The mouse pointer
stays grabbed and this leads to issues for the next drags.
To solve this, on a bad drop, the destination window has to request
from the source window the end of the dnd.

diff --git a/src/lib/elm_cnp.c b/src/lib/elm_cnp.c
index 168d78f..1fc5479 100644 (file)
--- a/src/lib/elm_cnp.c
+++ b/src/lib/elm_cnp.c
@@ -3085,6 +3085,7 @@ _wl_dnd_leave(void *data EINA_UNUSED, int type EINA_UNUSED, void *event)
 {
    Ecore_Wl_Event_Dnd_Leave *ev;
    Dropable *drop;
+   cnp_debug("In\n");
 
    ev = event;
    if ((drop = _wl_dropable_find(ev->win)))
@@ -3171,7 +3172,8 @@ _wl_dnd_position(void *data EINA_UNUSED, int type EINA_UNUSED, void *event)
 
                   evas_object_geometry_get(dropable->obj, &ox, &oy, NULL, NULL);
 
-                  cnp_debug("Candidate on %i %i: %p\n", x - ox, y - oy, dropable);
+                  cnp_debug("Candidate %p (%s)\n",
+                        dropable->obj, eo_class_name_get(eo_class_get(dropable->obj)));
                   _wl_dropable_handle(dropable, x - ox, y - oy);
                   wl_cnp_selection.requestwidget = dropable->obj;
                   will_accept = EINA_TRUE;
@@ -3199,39 +3201,29 @@ _wl_dnd_drop(void *data EINA_UNUSED, int type EINA_UNUSED, void *event)
 {
    Ecore_Wl_Event_Dnd_Drop *ev;
    Dropable *drop;
+   Eina_List *l;
 
    cnp_debug("In\n");
    ev = event;
-
-   if (!(drop = _wl_dropable_find(ev->win)))
-     return ECORE_CALLBACK_PASS_ON;
-
    savedtypes.x = ev->position.x;
    savedtypes.y = ev->position.y;
-   _dropable_coords_adjust(drop, &savedtypes.x, &savedtypes.y);
-   Evas *evas = _wl_evas_get_from_win(ev->win);
-
-   Eina_List *dropable_list = evas ? _dropable_list_geom_find(evas, savedtypes.x, savedtypes.y) : NULL;
 
-   /* check if there is dropable (obj) can accept this drop */
-   if (dropable_list)
+   EINA_LIST_FOREACH(drops, l, drop)
      {
-        Eina_List *l;
-        EINA_LIST_FOREACH(dropable_list, l, drop)
+        if (drop->last.in)
           {
-             if (drop->last.in)
-               {
-                  wl_cnp_selection.requestwidget = drop->obj;
-                  evas_object_event_callback_add(wl_cnp_selection.requestwidget,
-                        EVAS_CALLBACK_DEL,
-                        _wl_sel_obj_del2,
-                        &wl_cnp_selection);
-                  ecore_wl_dnd_drag_get(ecore_wl_input_get(), drop->last.type);
-                  break;
-               }
+             cnp_debug("Request data of type %s\n", drop->last.type);
+             wl_cnp_selection.requestwidget = drop->obj;
+             evas_object_event_callback_add(wl_cnp_selection.requestwidget,
+                   EVAS_CALLBACK_DEL,
+                   _wl_sel_obj_del2,
+                   &wl_cnp_selection);
+             ecore_wl_dnd_drag_get(ecore_wl_input_get(), drop->last.type);
+             return ECORE_CALLBACK_PASS_ON;
           }
      }
 
+   ecore_wl_dnd_drag_end(ecore_wl_input_get());
    return ECORE_CALLBACK_PASS_ON;
 }
 
@@ -3269,6 +3261,7 @@ _wl_dnd_receive(void *data, int type EINA_UNUSED, void *event)
 {
    Wl_Cnp_Selection *sel;
    Ecore_Wl_Event_Selection_Data_Ready *ev;
+   cnp_debug("In\n");
 
    ev = event;
    sel = data;