widget: Forward focus_highlight_style to win

See the previous commits. All focus_highlight APIs are defined in the
Widget class but only implemented at the Window level. For consistency I
believe this call should also be forwarded to the window. The previous
logic had absolutely no effect at all, except storing a stringshare.

The day focus_highlight becomes widget-specific (i.e. each widget has
its own highlight style) then this can be changed.

Note: This will apply to legacy API as well.

Ref T5363

src/lib/elementary/elm_widget.c

@@ -234,6 +234,30 @@ _elm_widget_focus_highlight_animate_set(Eo *obj, Elm_Widget_Smart_Data *sd EINA_
      elm_win_focus_highlight_animate_set(win, enable);
 }
 
+EOLIAN static Eina_Bool
+_elm_widget_focus_highlight_style_set(Eo *obj, Elm_Widget_Smart_Data *sd EINA_UNUSED, const char *style)
+{
+   // Forward to closest parent Window
+   Evas_Object *win = elm_widget_top_get(obj);
+
+   if (win && efl_isa(win, EFL_UI_WIN_CLASS))
+     return elm_obj_widget_focus_highlight_style_set(win, style);
+
+   return EINA_FALSE;
+}
+
+EOLIAN static const char *
+_elm_widget_focus_highlight_style_get(Eo *obj, Elm_Widget_Smart_Data *sd EINA_UNUSED)
+{
+   // Forward to closest parent Window
+   Evas_Object *win = elm_widget_top_get(obj);
+
+   if (win && efl_isa(win, EFL_UI_WIN_CLASS))
+     return elm_win_focus_highlight_style_get(win);
+
+   return NULL;
+}
+
 static Eina_Bool
 _tree_unfocusable(Eo *obj)
 {
@@ -1117,22 +1141,6 @@ _elm_widget_focus_region_show(Eo *obj, Elm_Widget_Smart_Data *_pd EINA_UNUSED)
      }
 }
 
-EOLIAN static Eina_Bool
-_elm_widget_focus_highlight_style_set(Eo *obj EINA_UNUSED, Elm_Widget_Smart_Data *sd, const char *style)
-{
-   // FIXME: This does not return the proper error code! Who cares if the
-   // string was changed?? This should return false if the desired style does
-   // not exist...
-   if (eina_stringshare_replace(&sd->focus_highlight_style, style)) return EINA_TRUE;
-   return EINA_FALSE;
-}
-
-EOLIAN static const char*
-_elm_widget_focus_highlight_style_get(Eo *obj EINA_UNUSED, Elm_Widget_Smart_Data *sd)
-{
-   return sd->focus_highlight_style;
-}
-
 static void
 _parent_focus(Evas_Object *obj, Elm_Object_Item *item)
 {

src/lib/elementary/elm_widget.eo

@@ -516,27 +516,23 @@ abstract Elm.Widget (Efl.Canvas.Group, Elm.Interface.Atspi_Accessible,
             region: Eina.Rectangle; [[The rectangle area.]]
          }
       }
-      @property focus_highlight_style {
-         [[Control the widget focus highlight style.
-
-           If $style is $null, the default will be used.
-         ]]
-         set {
-            return: bool; [[$true on success, $false otherwise.]]
-         }
-         get {
-         }
-         values {
-            style: string @nullable; [[The name of the focus highlight style.]]
-         }
-      }
       @property focus_highlight_enabled {
-         [[Whether focus highlight is enabled or not.]]
+         [[Whether focus highlight is enabled or not.
+
+           As of EFL 1.21 focus highlight properties apply to a single window,
+           not a single widget. As a consequence, calls to this function may
+           be forwarded to the parent window. Future versions of EFL may
+           implement widget-specific focus highlight properties.
+
+           See also @.widget_top.
+           See also @.focus_highlight_style.
+           See also @.focus_highlight_animate.
+         ]]
          set {
             [[Set the enabled status for the focus highlight in a window.
 
-              This function will enable or disable the focus highlight only
-              for the given window, regardless of the global setting for it.
+              This function will enable or disable the focus highlight,
+              regardless of the global setting for it.
             ]]
          }
          get {
@@ -546,15 +542,47 @@ abstract Elm.Widget (Efl.Canvas.Group, Elm.Interface.Atspi_Accessible,
             enabled: bool; [[The enabled value for the highlight.]]
          }
       }
+      @property focus_highlight_style {
+         [[Control the widget focus highlight style.
+
+           If $style is $null, the default will be used.
+
+           As of EFL 1.21 focus highlight properties apply to a single window,
+           not a single widget. As a consequence, calls to this function may
+           be forwarded to the parent window. Future versions of EFL may
+           implement widget-specific focus highlight properties.
+
+           See also @.widget_top.
+           See also @.focus_highlight_enabled.
+           See also @.focus_highlight_animate.
+         ]]
+         set {
+            /* FIXME: This is async... success here means nothing. */
+            return: bool; [[$true on success, $false otherwise.]]
+         }
+         get {
+         }
+         values {
+            style: string @nullable; [[The name of the focus highlight style.]]
+         }
+      }
       @property focus_highlight_animate {
-         [[Whether focus highlight should animate or not.]]
+         [[Whether focus highlight should animate or not.
+
+           As of EFL 1.21 focus highlight properties apply to a single window,
+           not a single widget. As a consequence, calls to this function may
+           be forwarded to the parent window. Future versions of EFL may
+           implement widget-specific focus highlight properties.
+
+           See also @.widget_top.
+           See also @.focus_highlight_style.
+           See also @.focus_highlight_enabled.
+         ]]
          set {
             [[Set the animate status for the focus highlight for this window.
 
               This function will enable or disable the animation of focus
-              highlight only for the given window. If the widget is not a
-              window, then this call is forwarded to the window (using
-              @.widget_top).
+              highlight.
             ]]
          }
          get {

src/lib/elementary/elm_widget.h

@@ -407,7 +407,6 @@ typedef struct _Elm_Widget_Smart_Data
    double                        scale;
    Elm_Theme                    *theme;
    const char                   *style;
-   const char                   *focus_highlight_style;  /**< custom focus style for a widget */
    const char                   *access_info;
    const char                   *accessible_name;
    unsigned int                  focus_order;