release/scripts/startup/bl_ui/space_userpref.py

@@ -1424,42 +1424,40 @@ class USERPREF_PT_file_paths_asset_libraries(FilePathsPanel, Panel):
         layout.use_property_decorate = False
 
         paths = context.preferences.filepaths
+        active_library_index = paths.active_asset_library
 
-        box = layout.box()
-        split = box.split(factor=0.35)
-        name_col = split.column()
-        path_col = split.column()
+        row = layout.row()
 
-        row = name_col.row(align=True)  # Padding
-        row.separator()
-        row.label(text="Name")
+        row.template_list(
+            "USERPREF_UL_asset_libraries", "user_asset_libraries",
+            paths, "asset_libraries",
+            paths, "active_asset_library"
+        )
 
-        row = path_col.row(align=True)  # Padding
-        row.separator()
-        row.label(text="Path")
+        col = row.column(align=True)
+        col.operator("preferences.asset_library_add", text="", icon='ADD')
+        props = col.operator("preferences.asset_library_remove", text="", icon='REMOVE')
+        props.index = active_library_index
 
-        for i, library in enumerate(paths.asset_libraries):
-            row = name_col.row()
-            row.alert = not library.name
-            row.prop(library, "name", text="")
-            row = name_col.row()
-            # Dummy for spacing
-            row.label(text="")
-            name_col.separator()
+        if active_library_index < 0:
+            return
 
-            row = path_col.row()
-            subrow = row.row()
-            subrow.alert = not library.path
-            subrow.prop(library, "path", text="")
-            row.operator("preferences.asset_library_remove", text="", icon='X', emboss=False).index = i
-            row = path_col.row()
-            row.prop(library, "import_method", text="")
-            row.label(text="", icon='BLANK1')
-            path_col.separator()
+        layout.separator()
 
-        row = box.row()
-        row.alignment = 'RIGHT'
-        row.operator("preferences.asset_library_add", text="", icon='ADD', emboss=False)
+        active_library = paths.asset_libraries[active_library_index]
+        layout.prop(active_library, "path")
+        layout.prop(active_library, "import_method", text="Import Method")
+
+
+class USERPREF_UL_asset_libraries(bpy.types.UIList):
+    def draw_item(self, _context, layout, _data, item, icon, _active_data, _active_propname, _index):
+        asset_library = item
+
+        if self.layout_type in {'DEFAULT', 'COMPACT'}:
+            layout.prop(asset_library, "name", text="", emboss=False)
+        elif self.layout_type == 'GRID':
+            layout.alignment = 'CENTER'
+            layout.prop(asset_library, "name", text="", emboss=False)
 
 
 # -----------------------------------------------------------------------------
@@ -2495,6 +2493,9 @@ classes = (
     # USERPREF_PT_experimental_tweaks,
     USERPREF_PT_experimental_debugging,
 
+    # UI lists
+    USERPREF_UL_asset_libraries,
+
     # Add dynamically generated editor theme panels last,
     # so they show up last in the theme section.
     *ThemeGenericClassGenerator.generate_panel_classes_from_theme_areas(),

source/blender/editors/space_userpref/userpref_ops.c

@@ -134,7 +134,9 @@ static int preferences_asset_library_add_exec(bContext *UNUSED(C), wmOperator *o
   BLI_split_file_part(path, dirname, sizeof(dirname));
 
   /* NULL is a valid directory path here. A library without path will be created then. */
-  BKE_preferences_asset_library_add(&U, dirname, path);
+  const bUserAssetLibrary *new_library = BKE_preferences_asset_library_add(&U, dirname, path);
+  /* Activate new library in the UI for further setup. */
+  U.active_asset_library = BLI_findindex(&U.asset_libraries, new_library);
   U.runtime.is_dirty = true;
 
   /* There's no dedicated notifier for the Preferences. */
@@ -182,16 +184,32 @@ static void PREFERENCES_OT_asset_library_add(wmOperatorType *ot)
 /** \name Remove Asset Library Operator
  * \{ */
 
+static bool preferences_asset_library_remove_poll(bContext *C)
+{
+  if (BLI_listbase_is_empty(&U.asset_libraries)) {
+    CTX_wm_operator_poll_msg_set(C, "There is no asset library to remove");
+    return false;
+  }
+  return true;
+}
+
 static int preferences_asset_library_remove_exec(bContext *UNUSED(C), wmOperator *op)
 {
   const int index = RNA_int_get(op->ptr, "index");
   bUserAssetLibrary *library = BLI_findlink(&U.asset_libraries, index);
-  if (library) {
+  if (!library) {
+    return OPERATOR_CANCELLED;
+  }
+
   BKE_preferences_asset_library_remove(&U, library);
+  const int count_remaining = BLI_listbase_count(&U.asset_libraries);
+  /* Update active library index to be in range. */
+  CLAMP(U.active_asset_library, 0, count_remaining - 1);
   U.runtime.is_dirty = true;
+
   /* Trigger refresh for the Asset Browser. */
   WM_main_add_notifier(NC_SPACE | ND_SPACE_ASSET_PARAMS, NULL);
-  }
+
   return OPERATOR_FINISHED;
 }
 
@@ -203,6 +221,7 @@ static void PREFERENCES_OT_asset_library_remove(wmOperatorType *ot)
       "Remove a path to a .blend file, so the Asset Browser will not attempt to show it anymore";
 
   ot->exec = preferences_asset_library_remove_exec;
+  ot->poll = preferences_asset_library_remove_poll;
 
   ot->flag = OPTYPE_INTERNAL;
 

source/blender/makesdna/DNA_userdef_types.h

@@ -783,8 +783,10 @@ typedef struct UserDef {
 
   char keyconfigstr[64];
 
+  /** Index of the asset library being edited in the Preferences UI. */
+  short active_asset_library;
+
   short undosteps;
-  char _pad1[2];
   int undomemory;
   float gpu_viewport_quality DNA_DEPRECATED;
   short gp_manhattandist, gp_euclideandist, gp_eraser;

source/blender/makesrna/intern/rna_space.c

@@ -6965,8 +6965,8 @@ static void rna_def_fileselect_asset_params(BlenderRNA *brna)
   prop = RNA_def_property(srna, "import_type", PROP_ENUM, PROP_NONE);
   RNA_def_property_enum_items(prop, asset_import_type_items);
   RNA_def_property_ui_text(prop, "Import Method", "Determine how the asset will be imported");
-  /* Asset drag info saved by buttons stores the import type, so the space must redraw when import
-   * type changes. */
+  /* Asset drag info saved by buttons stores the import method, so the space must redraw when
+   * import type changes. */
   RNA_def_property_update(prop, NC_SPACE | ND_SPACE_FILE_LIST, NULL);
 }
 

source/blender/makesrna/intern/rna_userdef.c

@@ -6346,6 +6346,13 @@ static void rna_def_userdef_filepaths(BlenderRNA *brna)
   prop = RNA_def_property(srna, "asset_libraries", PROP_COLLECTION, PROP_NONE);
   RNA_def_property_struct_type(prop, "UserAssetLibrary");
   RNA_def_property_ui_text(prop, "Asset Libraries", "");
+
+  prop = RNA_def_property(srna, "active_asset_library", PROP_INT, PROP_NONE);
+  RNA_def_property_ui_text(prop,
+                           "Active Asset Library",
+                           "Index of the asset library being edited in the Preferences UI");
+  /* Tag for UI-only update, meaning preferences will not be tagged as changed. */
+  RNA_def_property_update(prop, 0, "rna_userdef_ui_update");
 }
 
 static void rna_def_userdef_apps(BlenderRNA *brna)