[gimp] app: edit-fill-fg|bg|pattern multi-layer aware.

[Jehan <jehanp src gnome org>]

commit ae0f595a199c3c25c74aab3adfe4f987ac63f765
Author: Jehan <jehan girinstud io>
Date:   Fri Jul 31 17:52:53 2020 +0200

    app: edit-fill-fg|bg|pattern multi-layer aware.

 app/actions/edit-actions.c  |  6 +++---
 app/actions/edit-commands.c | 13 ++++++++++---
 2 files changed, 13 insertions(+), 6 deletions(-)
---
diff --git a/app/actions/edit-actions.c b/app/actions/edit-actions.c
index 77c3c50086..da50ef1210 100644
--- a/app/actions/edit-actions.c
+++ b/app/actions/edit-actions.c
@@ -390,9 +390,9 @@ edit_actions_update (GimpActionGroup *group,
   /*             "edit-named-paste" is always active */
 
   SET_SENSITIVE ("edit-clear",              have_writable && have_no_groups);
-  SET_SENSITIVE ("edit-fill-fg",            writable && !children);
-  SET_SENSITIVE ("edit-fill-bg",            writable && !children);
-  SET_SENSITIVE ("edit-fill-pattern",       writable && !children);
+  SET_SENSITIVE ("edit-fill-fg",            have_writable && have_no_groups);
+  SET_SENSITIVE ("edit-fill-bg",            have_writable && have_no_groups);
+  SET_SENSITIVE ("edit-fill-pattern",       have_writable && have_no_groups);
 
 #undef SET_LABEL
 #undef SET_SENSITIVE
diff --git a/app/actions/edit-commands.c b/app/actions/edit-commands.c
index 05d515e3fe..833ff79bf8 100644
--- a/app/actions/edit-commands.c
+++ b/app/actions/edit-commands.c
@@ -512,11 +512,12 @@ edit_fill_cmd_callback (GimpAction *action,
                         gpointer    data)
 {
   GimpImage       *image;
-  GimpDrawable    *drawable;
+  GList           *drawables;
+  GList           *iter;
   GimpFillType     fill_type;
   GimpFillOptions *options;
   GError          *error = NULL;
-  return_if_no_drawable (image, drawable, data);
+  return_if_no_drawables (image, drawables, data);
 
   fill_type = (GimpFillType) g_variant_get_int32 (value);
 
@@ -526,7 +527,13 @@ edit_fill_cmd_callback (GimpAction *action,
                                           action_data_get_context (data),
                                           fill_type, &error))
     {
-      gimp_drawable_edit_fill (drawable, options, NULL);
+      gimp_image_undo_group_start (image, GIMP_UNDO_GROUP_PAINT,
+                                   gimp_fill_options_get_undo_desc (options));
+
+      for (iter = drawables; iter; iter = iter->next)
+        gimp_drawable_edit_fill (iter->data, options, NULL);
+
+      gimp_image_undo_group_end (image);
       gimp_image_flush (image);
     }
   else