UI: Hide collection tab when scene master collection is active

CollectionLineart does not care about the configurations
in master collection.
Other options are not applicaple for master collection as well.
Hence hiding it.

Reviewed by Dalai Felinto (dfelinto)

Differential Revision: https://developer.blender.org/D11702

release/scripts/startup/bl_ui/properties_collection.py

@@ -25,6 +25,10 @@ class CollectionButtonsPanel:
     bl_region_type = 'WINDOW'
     bl_context = "collection"
 
+    @classmethod
+    def poll(cls, context):
+        return context.collection != context.scene.collection
+
 
 def lineart_make_line_type_entry(col, line_type, text_disp, expand, search_from):
     col.prop(line_type, "use", text=text_disp)
@@ -38,12 +42,6 @@ def lineart_make_line_type_entry(col, line_type, text_disp, expand, search_from)
 class COLLECTION_PT_collection_flags(CollectionButtonsPanel, Panel):
     bl_label = "Restrictions"
 
-    @classmethod
-    def poll(cls, context):
-        vl = context.view_layer
-        vlc = vl.active_layer_collection
-        return (vlc.name != 'Master Collection')
-
     def draw(self, context):
         layout = self.layout
         layout.use_property_split = True

source/blender/editors/space_buttons/buttons_context.c

@@ -154,7 +154,7 @@ static bool buttons_context_path_world(ButsContextPath *path)
   return false;
 }
 
-static bool buttons_context_path_collection(ButsContextPath *path, wmWindow *window)
+static bool buttons_context_path_collection(bContext *C, ButsContextPath *path, wmWindow *window)
 {
   PointerRNA *ptr = &path->ptr[path->len - 1];
 
@@ -162,10 +162,19 @@ static bool buttons_context_path_collection(ButsContextPath *path, wmWindow *win
   if (RNA_struct_is_a(ptr->type, &RNA_Collection)) {
     return true;
   }
+
+  Scene *scene = CTX_data_scene(C);
+
   /* if we have a view layer, use the view layer's active collection */
   if (buttons_context_path_view_layer(path, window)) {
     ViewLayer *view_layer = path->ptr[path->len - 1].data;
     Collection *c = view_layer->active_collection->collection;
+
+    /* Do not show collection tab for master collection. */
+    if (c == scene->master_collection) {
+      return false;
+    }
+
     if (c) {
       RNA_id_pointer_create(&c->id, &path->ptr[path->len]);
       path->len++;
@@ -600,7 +609,7 @@ static bool buttons_context_path(
       found = buttons_context_path_world(path);
       break;
     case BCONTEXT_COLLECTION: /* This is for Line Art collection flags */
-      found = buttons_context_path_collection(path, window);
+      found = buttons_context_path_collection(C, path, window);
       break;
     case BCONTEXT_TOOL:
       found = true;

source/blender/editors/space_buttons/space_buttons.c

@@ -202,11 +202,11 @@ int ED_buttons_tabs_list(SpaceProperties *sbuts, short *context_tabs_array)
     context_tabs_array[length] = BCONTEXT_WORLD;
     length++;
   }
-  if (length != 0) {
-    context_tabs_array[length] = -1;
-    length++;
-  }
   if (sbuts->pathflag & (1 << BCONTEXT_COLLECTION)) {
+    if (length != 0) {
+      context_tabs_array[length] = -1;
+      length++;
+    }
     context_tabs_array[length] = BCONTEXT_COLLECTION;
     length++;
   }