Genlist: do not segv if the user clear the list on item double-click

@fix
moved the user callbacks call at the end of the function, so the user
is able to modify the list without making the code below the call to
fail miserably.

Also improved the Genlist Del test to also include this case.

2 files changed, 39 insertions, 16 deletions

diff --git a/src/bin/test_genlist.c b/src/bin/test_genlist.c
index 0d80d1c58..c6d65c79a 100644
--- a/src/bin/test_genlist.c
+++ b/src/bin/test_genlist.c
@@ -3750,6 +3750,16 @@ _gl_del_unrealized_cb(void *data EINA_UNUSED, Evas_Object *obj EINA_UNUSED,
    printf("unrealized item # %d\n", num);
 }
 
+static void
+_gl_del_doubleclick_cb(void *data EINA_UNUSED, Evas_Object *obj EINA_UNUSED,
+                       void *event_info)
+{
+   int num = (int)(uintptr_t)elm_object_item_data_get(event_info);
+   int num_category = num % 4;
+
+   if (num_category == 3)
+     elm_genlist_clear(obj);
+}
 static Evas_Object *
 _gl_del_genlist_add(Evas_Object *bx)
 {
@@ -3762,6 +3772,8 @@ _gl_del_genlist_add(Evas_Object *bx)
    evas_object_show(gl);
    evas_object_smart_callback_add(gl, "unrealized",
                                   _gl_del_unrealized_cb, NULL);
+   evas_object_smart_callback_add(gl, "clicked,double",
+                                  _gl_del_doubleclick_cb, NULL);
 
    return gl;
 }
@@ -3786,15 +3798,20 @@ char *_gl_del_text_get(void *data, Evas_Object *obj EINA_UNUSED,
 {
    char buf[256] = { 0 };
    int num = (int)(uintptr_t)data;
-   int num_category = num % 3;
+   int num_category = num % 4;
 
    if (num_category == 0)
-     snprintf(buf, sizeof(buf), "Item # %i - Item Del", num);
+     snprintf(buf, sizeof(buf),
+              "Item #%.02i - 1. Item Del", num);
    else if (num_category == 1)
-     snprintf(buf, sizeof(buf), "Item # %i - Genlist Clear and Item Append",
-              num);
+     snprintf(buf, sizeof(buf),
+              "Item #%.02i - 2. Genlist Clear and Item Append", num);
    else if (num_category == 2)
-     snprintf(buf, sizeof(buf), "Item # %i - Genlist Del", num);
+     snprintf(buf, sizeof(buf),
+              "Item #%.02i - 3. Genlist Del", num);
+   else if (num_category == 3)
+     snprintf(buf, sizeof(buf),
+              "Item #%.02i - 4. Genlist Clear on double-click", num);
 
    return strdup(buf);
 }
@@ -3803,7 +3820,7 @@ static void
 _gl_del_sel(void *data, Evas_Object *obj, void *event_info)
 {
    int num = (int)(uintptr_t)data;
-   int num_category = num % 3;
+   int num_category = num % 4;
    Elm_Object_Item *it = event_info;
    Elm_Genlist_Item_Class *itc =
       (Elm_Genlist_Item_Class *)elm_genlist_item_item_class_get(it);
@@ -3856,7 +3873,8 @@ test_genlist_del(void *data EINA_UNUSED,
                        " on item selection.<br/>"
                        "   1. genlist item deletion<br/>"
                        "   2. genlist clear and item append<br/>"
-                       "   3. genlist del</align>");
+                       "   3. genlist del<br/>"
+                       "   4. genlist clear on double-click</align>");
    elm_object_content_set(fr, lb);
    evas_object_show(lb);
 
diff --git a/src/lib/elm_genlist.c b/src/lib/elm_genlist.c
index 548cd4651..0631279d6 100644
--- a/src/lib/elm_genlist.c
+++ b/src/lib/elm_genlist.c
@@ -3868,15 +3868,7 @@ _item_mouse_down_cb(void *data,
    else sd->on_hold = EINA_FALSE;
    if (sd->on_hold) return;
    sd->wasselected = it->selected;
-   it->highlight_cb(it);
-   if (ev->flags & EVAS_BUTTON_DOUBLE_CLICK)
-     if ((!elm_widget_item_disabled_get(it)) &&
-         (it->select_mode != ELM_OBJECT_SELECT_MODE_DISPLAY_ONLY))
-       {
-          evas_object_smart_callback_call(WIDGET(it), SIG_CLICKED_DOUBLE, it);
-          evas_object_smart_callback_call(WIDGET(it), SIG_ACTIVATED, it);
-       }
-   evas_object_smart_callback_call(WIDGET(it), SIG_PRESSED, it);
+   
    ecore_timer_del(it->item->swipe_timer);
    it->item->swipe_timer = ecore_timer_add(SWIPE_TIME, _swipe_cancel, it);
    ELM_SAFE_FREE(it->long_timer, ecore_timer_del);
@@ -3887,6 +3879,19 @@ _item_mouse_down_cb(void *data,
      it->long_timer = NULL;
    sd->swipe = EINA_FALSE;
    sd->movements = 0;
+
+   // and finally call the user callbacks.
+   // NOTE: keep this code at the bottom, as the user can change the
+   //       list at this point (clear, delete, etc...)
+   it->highlight_cb(it);
+   if (ev->flags & EVAS_BUTTON_DOUBLE_CLICK)
+     if ((!elm_widget_item_disabled_get(it)) &&
+         (it->select_mode != ELM_OBJECT_SELECT_MODE_DISPLAY_ONLY))
+       {
+          evas_object_smart_callback_call(WIDGET(it), SIG_CLICKED_DOUBLE, it);
+          evas_object_smart_callback_call(WIDGET(it), SIG_ACTIVATED, it);
+       }
+   evas_object_smart_callback_call(WIDGET(it), SIG_PRESSED, it);
 }
 
 static Item_Block *