button: Add support for efl_text_set

For now a very quick and dirty solution, relying on elm_layout
legacy APIs.

src/lib/elementary/elm_button.c

@@ -445,6 +445,8 @@ _elm_button_class_constructor(Efl_Class *klass)
    evas_smart_legacy_type_register(MY_CLASS_NAME_LEGACY, klass);
 }
 
+EFL_TEXT_DEFAULT_IMPLEMENT(elm_button, Elm_Button_Data)
+
 /* Efl.Part begin */
 
 ELM_PART_OVERRIDE(elm_button, ELM_BUTTON, ELM_LAYOUT, Elm_Button_Data, Elm_Part_Data)

src/lib/elementary/elm_button.eo

@@ -1,4 +1,4 @@
-class Elm.Button (Elm.Layout, Efl.Ui.Clickable,
+class Elm.Button (Elm.Layout, Efl.Ui.Clickable, Efl.Text,
                   Elm.Interface.Atspi_Widget_Action)
 {
    [[Push-button widget
@@ -87,5 +87,6 @@ class Elm.Button (Elm.Layout, Efl.Ui.Clickable,
       Elm.Layout.sizing_eval;
       Elm.Interface.Atspi_Widget_Action.elm_actions { get; }
       Efl.Part.part;
+      Efl.Text.text { get; set; }
    }
 }

src/lib/elementary/elm_part_helper.h

@@ -125,4 +125,17 @@ _ ## type ## _internal_part_efl_container_content_unset(Eo *obj, void *_pd EINA_
    ELM_PART_RETURN_VAL(_ ## type ## _content_unset(pd->obj, sd, pd->part)); \
 }
 
+#define EFL_TEXT_DEFAULT_IMPLEMENT(type, Type) \
+EOLIAN static void \
+_ ## type ## _efl_text_text_set(Eo *obj, Type *pd EINA_UNUSED, const char *text) \
+{ \
+   elm_layout_text_set(obj, NULL, text); \
+} \
+\
+EOLIAN static const char * \
+_ ## type ## _efl_text_text_get(Eo *obj, Elm_Button_Data *pd EINA_UNUSED) \
+{ \
+   return elm_layout_text_get(obj, NULL); \
+}
+
 #endif