From 9a20ac3b8dbc648f466fbf2ddd326522e27e2b05 Mon Sep 17 00:00:00 2001
From: Mark Tolmacs <mark@lazycat.hu>
Date: Tue, 11 Mar 2025 15:48:08 +0100
Subject: [PATCH] Insert after duplication

---
 packages/excalidraw/element/duplicate.ts | 25 ++++++++++++++++++++++--
 1 file changed, 23 insertions(+), 2 deletions(-)

diff --git a/packages/excalidraw/element/duplicate.ts b/packages/excalidraw/element/duplicate.ts
index fc4875dde..ac8844a9b 100644
--- a/packages/excalidraw/element/duplicate.ts
+++ b/packages/excalidraw/element/duplicate.ts
@@ -3,9 +3,14 @@ import { getNewGroupIdsForDuplication } from "../groups";
 import { randomId, randomInteger } from "../random";
 import type { AppState } from "../types";
 import type { Mutable } from "../utility-types";
-import { arrayToMap, getUpdatedTimestamp, isTestEnv } from "../utils";
+import {
+  arrayToMap,
+  castArray,
+  getUpdatedTimestamp,
+  invariant,
+  isTestEnv,
+} from "../utils";
 import { bumpVersion } from "./mutateElement";
-import { isArrowElement } from "./typeChecks";
 import type { ExcalidrawElement, GroupId } from "./types";
 
 /**
@@ -176,12 +181,28 @@ export const duplicateElements = (
       clonedElement.frameId = maybeGetNewIdFor(clonedElement.frameId);
     }
 
+    insertAfterIndex();
+
     clonedElements.push(clonedElement);
   }
 
   return clonedElements;
 };
 
+const insertAfterIndex = (
+  elementsWithClones: ExcalidrawElement[],
+  index: number,
+  elements: ExcalidrawElement | null | ExcalidrawElement[],
+) => {
+  invariant(index !== -1, "targetIndex === -1 ");
+
+  if (!Array.isArray(elements) && !elements) {
+    return;
+  }
+
+  return elementsWithClones.splice(index + 1, 0, ...castArray(elements));
+};
+
 // Simplified deep clone for the purpose of cloning ExcalidrawElement.
 //
 // Only clones plain objects and arrays. Doesn't clone Date, RegExp, Map, Set,