🐛 Fix issue when undo after changing the artboard of a shape

CHANGES.md

@@ -19,6 +19,7 @@
 - Fix problem with mask and flip [#715](https://github.com/penpot/penpot/issues/715)
 - Fix problem with rotated blur [Taiga #1370](https://tree.taiga.io/project/penpot/issue/1370)
 - Disables buttons in view mode for users without permissions [Taiga #1328](https://tree.taiga.io/project/penpot/issue/1328)
+- Fix issue when undo after changing the artboard of a shape [Taiga #1304](https://tree.taiga.io/project/penpot/issue/1304)
 
 ### :heart: Community contributions by (Thank you!)
 

common/app/common/pages.cljc

@@ -62,6 +62,7 @@
 (d/export helpers/touched-group?)
 (d/export helpers/get-base-shape)
 (d/export helpers/is-parent?)
+(d/export helpers/get-index-in-parent)
 
 ;; Process changes
 (d/export changes/process-changes)

common/app/common/pages/helpers.cljc

@@ -401,3 +401,12 @@
       (recur (get objects (first pending))
              (conj done (:id current))
              (concat (rest pending) (:shapes current))))))
+
+(defn get-index-in-parent
+  "Retrieves the index in the parent"
+  [objects shape-id]
+  (let [shape (get objects shape-id)
+        parent (get objects (:parent-id shape))
+        [parent-idx _] (d/seek (fn [[idx child-id]] (= child-id shape-id))
+                               (d/enumerate (:shapes parent)))]
+    parent-idx))

frontend/src/app/main/data/workspace/transforms.cljs

@@ -249,14 +249,15 @@
                   :parent-id frame-id
                   :shapes (mapv :id moving-shapes)}]
 
-            moving-shapes-by-frame-id (group-by :frame-id moving-shapes)
 
-            uch (->> moving-shapes-by-frame-id
-                     (mapv (fn [[frame-id shapes]]
+            uch (->> moving-shapes
+                     (reverse)
+                     (mapv (fn [shape]
                              {:type :mov-objects
                               :page-id page-id
-                              :parent-id frame-id
-                              :shapes (mapv :id shapes)})))]
+                              :parent-id (:parent-id shape)
+                              :index (cp/get-index-in-parent objects (:id shape))
+                              :shapes [(:id shape)]})))]
 
         (when-not (empty? rch)
           (rx/of dwc/pop-undo-into-transaction