added support for different dropdowns in different variadic subslots by returning a list of menu-lists with the first item being an empty list

Author: jmoenig

HISTORY.md

@@ -35,7 +35,7 @@
     * support for variadic upvars in custom blocks
     * new 'parameter' custom block input type, same as 'upvar', but doesn't add a script variable when evaluated, supports variadicity
     * support for dynamically setting the contents of expanded variadic upvars and input slots by a user script in the block definition
-    * support for user-scriptable rename-menus in upvars, including variadic ones
+    * support for user-scriptable rename-menus in upvars, including variadic ones (a single menu is repeated in each non-unevaluated slot, a list of menu-lists whose first item is an empty list gets repeated across all subslots)
 * **Notable Changes:**
     * added icons to the IDE tabs (scripts, costumes, sounds)
     * flat design mode now (again) supports rounded corners (sigh...)
@@ -64,6 +64,9 @@
     * new Vietnamese translation, thank you, Serge Faure @seeeerge !!
     * German
 
+### 2026-01-27
+* blocks: added support for different dropdowns in different variadic subslots by returning a list of menu-lists with the first item being an empty list
+
 ### 2026-01-26
 * blocks, byob: new %parameter custom block input type, same as %upvar, but doesn't add a script variable when evaluated, supports variadicity
 

snap.html

@@ -16,7 +16,7 @@
         <script src="src/morphic.js?version=2025-12-17"></script>
         <script src="src/symbols.js?version=2024-12-09"></script>
         <script src="src/widgets.js?version=2025-12-19"></script>
-        <script src="src/blocks.js?version=2026-01-26"></script>
+        <script src="src/blocks.js?version=2026-01-27"></script>
         <script src="src/threads.js?version=2026-01-19"></script>
         <script src="src/objects.js?version=2026-01-19"></script>
         <script src="src/scenes.js?version=2026-01-04"></script>

src/blocks.js

@@ -162,7 +162,7 @@ CustomHatBlockMorph, ZOOM*/
 
 // Global stuff ////////////////////////////////////////////////////////
 
-modules.blocks = '2026-January-26';
+modules.blocks = '2026-January-27';
 
 var SyntaxElementMorph;
 var BlockMorph;
@@ -11465,7 +11465,20 @@ InputSlotMorph.prototype.dynamicMenu = function (searching, enableKeyboard) {
     };
 
     show = (result = new List()) => {
-        var menu = this.menuFromDict(format(result), null, enableKeyboard);
+        var first = result.at(1),
+            src, subslotIdx, menuIdx, menu;
+
+        if (this.parent instanceof MultiArgMorph &&
+            first instanceof List &&
+            first.isEmpty()
+        ) {
+            subslotIdx = this.parent.inputs().indexOf(this);
+            menuIdx = (subslotIdx % (result.length() - 1)) + 2;
+            src = result.at(menuIdx);
+        } else {
+            src = result;
+        }
+        menu = this.menuFromDict(format(src), null, enableKeyboard);
         if (!menu) { // has already happened
             return;
         }