scripts/startup/bl_ui/space_assets.py

@@ -84,6 +84,17 @@ class ASSETBROWSER_PT_metadata(Panel):
     bl_options = {'HIDE_HEADER'}
     bl_category = 'Metadata'
 
+
+    @staticmethod
+    def metadata_prop(layout, asset_data, propname):
+        """
+        Only display properties that are either set or can be modified (i.e. the
+        asset is in the current file). Empty, non-editable fields are not really useful.
+        """
+        if getattr(asset_data, propname) or not asset_data.is_property_readonly(propname):
+            layout.prop(asset_data, propname)
+
+
     def draw(self, context):
         layout = self.layout
         wm = context.window_manager
@@ -94,9 +105,6 @@ class ASSETBROWSER_PT_metadata(Panel):
             layout.label(text="No active asset", icon='INFO')
             return
 
-        asset_library_ref = context.asset_library_ref
-        asset_lib_path = bpy.types.AssetHandle.get_full_library_path(asset_file, asset_library_ref)
-
         prefs = context.preferences
         show_asset_debug_info = prefs.view.show_developer_ui and prefs.experimental.show_asset_debug_info
 
@@ -126,8 +134,11 @@ class ASSETBROWSER_PT_metadata(Panel):
         row.prop(wm, "asset_path_dummy", text="Source")
         row.operator("asset.open_containing_blend_file", text="", icon='TOOL_SETTINGS')
 
-        layout.prop(asset_file.asset_data, "description")
-        layout.prop(asset_file.asset_data, "author")
+        asset_data = asset_file.asset_data
+        self.metadata_prop(layout, asset_data, "description")
+        self.metadata_prop(layout, asset_data, "license")
+        self.metadata_prop(layout, asset_data, "copyright")
+        self.metadata_prop(layout, asset_data, "author")
 
 
 class ASSETBROWSER_PT_metadata_preview(Panel):
@@ -139,11 +150,10 @@ class ASSETBROWSER_PT_metadata_preview(Panel):
     def draw(self, context):
         layout = self.layout
         asset_handle = context.asset_handle
-        asset_file = asset_handle.file_data
 
         row = layout.row()
         box = row.box()
-        box.template_icon(icon_value=asset_file.preview_icon_id, scale=5.0)
+        box.template_icon(icon_value=asset_handle.preview_icon_id, scale=5.0)
 
         col = row.column(align=True)
         col.operator("ed.lib_id_load_custom_preview", icon='FILEBROWSER', text="")

source/blender/makesrna/intern/rna_asset.c

@@ -373,6 +373,12 @@ static PointerRNA rna_AssetHandle_local_id_get(PointerRNA *ptr)
   return rna_pointer_inherit_refine(ptr, &RNA_ID, id);
 }
 
+static int rna_AssetHandle_preview_icon_id_get(PointerRNA *ptr)
+{
+  AssetHandle *asset = ptr->data;
+  return ED_assetlist_asset_preview_icon_id_request(asset);
+}
+
 const EnumPropertyItem *rna_asset_library_reference_itemf(bContext *UNUSED(C),
                                                           PointerRNA *UNUSED(ptr),
                                                           PropertyRNA *UNUSED(prop),
@@ -579,6 +585,19 @@ static void rna_def_asset_handle(BlenderRNA *brna)
                            "data-block in this file");
   RNA_def_property_flag(prop, PROP_HIDDEN);
 
+  prop = RNA_def_int(
+      srna,
+      "preview_icon_id",
+      0,
+      INT_MIN,
+      INT_MAX,
+      "Icon ID",
+      "Unique integer identifying the preview of this asset as an icon (zero means invalid)",
+      INT_MIN,
+      INT_MAX);
+  RNA_def_property_int_funcs(prop, "rna_AssetHandle_preview_icon_id_get", NULL, NULL);
+  RNA_def_property_clear_flag(prop, PROP_EDITABLE);
+
   rna_def_asset_handle_api(srna);
 }