lint

- Move TransactionLedger + types from @excalidraw/element into
  packages/excalidraw/transaction.ts (no external consumers)
- Move commitSyntheticIncrement from App passthrough to Store directly,
  fix didAppStateChange to use Delta.isRightDifferent instead of
  presence-check, and replace isolated increments queue with direct
  scheduleMicroAction + flushMicroActions
- Remove commitSyntheticHistoryEntry from App, expose store and
  createTransaction on AppClassProperties instead
- Replace O(N) deep-copy snapshot in updateScene with shallow map copy
  (element refs are safe — ledger ignores index, the only in-place
  mutated prop, and deep-copies only recorded elements)
- Merge ledger + manager tests into single transaction.test.tsx
- Update dev-docs to reflect new file structure

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

.playwright-mcp/page-2026-06-26T08-26-20-195Z.yml

@@ -1,124 +0,0 @@
-- generic [ref=e1]:
-  - banner:
-    - heading "Excalidraw" [level=1] [ref=e2]
-  - generic [active] [ref=e5]:
-    - generic:
-      - generic:
-        - generic:
-          - button [ref=e9] [cursor=pointer]:
-            - img [ref=e10]
-          - region "Shapes":
-            - generic [ref=e16]:
-              - generic:
-                - generic:
-                  - text: To move canvas, hold
-                  - generic: Scroll wheel
-                  - text: or
-                  - generic: Space
-                  - text: while dragging, or use the hand tool
-              - heading "Shapes" [level=2] [ref=e17]
-              - generic [ref=e18]:
-                - generic "Keep selected tool active after drawing — Q" [ref=e19] [cursor=pointer]:
-                  - checkbox "Keep selected tool active after drawing"
-                  - img [ref=e21]
-                - generic "Hand (panning tool) — H or null" [ref=e29] [cursor=pointer]:
-                  - radio "Hand (panning tool)"
-                  - img [ref=e31]
-                - generic "Selection — V or 1" [ref=e38] [cursor=pointer]:
-                  - radio "Selection" [checked]
-                  - generic [ref=e39]:
-                    - img [ref=e40]
-                    - generic [ref=e45]: "1"
-                - generic "Rectangle — R or 2" [ref=e46] [cursor=pointer]:
-                  - radio "Rectangle"
-                  - generic [ref=e47]:
-                    - img [ref=e48]
-                    - generic [ref=e52]: "2"
-                - generic "Diamond — D or 3" [ref=e53] [cursor=pointer]:
-                  - radio "Diamond"
-                  - generic [ref=e54]:
-                    - img [ref=e55]
-                    - generic [ref=e59]: "3"
-                - generic "Ellipse — O or 4" [ref=e60] [cursor=pointer]:
-                  - radio "Ellipse"
-                  - generic [ref=e61]:
-                    - img [ref=e62]
-                    - generic [ref=e66]: "4"
-                - generic "Arrow — A or 5" [ref=e67] [cursor=pointer]:
-                  - radio "Arrow"
-                  - generic [ref=e68]:
-                    - img [ref=e69]
-                    - generic [ref=e74]: "5"
-                - generic "Line — L or 6" [ref=e75] [cursor=pointer]:
-                  - radio "Line"
-                  - generic [ref=e76]:
-                    - img [ref=e77]
-                    - generic [ref=e78]: "6"
-                - generic "Draw — P or 7" [ref=e79] [cursor=pointer]:
-                  - radio "Draw"
-                  - generic [ref=e80]:
-                    - img [ref=e81]
-                    - generic [ref=e85]: "7"
-                - generic "Text — T or 8" [ref=e86] [cursor=pointer]:
-                  - radio "Text"
-                  - generic [ref=e87]:
-                    - img [ref=e88]
-                    - generic [ref=e93]: "8"
-                - generic "Insert image — 9" [ref=e94] [cursor=pointer]:
-                  - radio "Insert image"
-                  - generic [ref=e95]:
-                    - img [ref=e96]
-                    - generic [ref=e101]: "9"
-                - generic "Eraser — E or 0" [ref=e102] [cursor=pointer]:
-                  - radio "Eraser"
-                  - generic [ref=e103]:
-                    - img [ref=e104]
-                    - generic [ref=e109]: "0"
-                - button "More tools" [ref=e112] [cursor=pointer]:
-                  - img [ref=e113]
-          - generic:
-            - generic [ref=e119]:
-              - link "Excalidraw+" [ref=e120] [cursor=pointer]:
-                - /url: https://plus.excalidraw.com/plus?utm_source=excalidraw&utm_medium=app&utm_content=guestBanner#excalidraw-redirect
-              - button "Live collaboration..." [ref=e121] [cursor=pointer]:
-                - img [ref=e122]
-            - generic "Library" [ref=e124]:
-              - checkbox "Library"
-              - img [ref=e127] [cursor=pointer]
-      - contentinfo:
-        - region "Canvas actions" [ref=e132]:
-          - heading "Canvas actions" [level=2] [ref=e133]
-          - generic [ref=e135]:
-            - button "Zoom out" [ref=e136] [cursor=pointer]:
-              - img [ref=e138]
-            - button "Reset zoom" [ref=e140] [cursor=pointer]: 100%
-            - button "Zoom in" [ref=e141] [cursor=pointer]:
-              - img [ref=e143]
-          - generic [ref=e145]:
-            - button "Undo" [disabled] [ref=e148]:
-              - img [ref=e150]
-            - button "Redo" [disabled] [ref=e154]:
-              - img [ref=e156]
-        - generic [ref=e158]:
-          - generic [ref=e159]:
-            - button "lock scroll" [ref=e160] [cursor=pointer]
-            - generic [ref=e161]:
-              - text: overscroll
-              - spinbutton "overscroll" [ref=e162]: "0.2"
-            - generic [ref=e163]:
-              - text: zoom factor
-              - spinbutton "zoom factor" [ref=e164]: "0.2"
-            - generic [ref=e165]:
-              - checkbox "lock zoom" [ref=e166]
-              - text: lock zoom
-            - generic [ref=e167]:
-              - checkbox "animate" [ref=e168]
-              - text: animate
-          - link "Blog post on end-to-end encryption in Excalidraw" [ref=e169] [cursor=pointer]:
-            - /url: https://plus.excalidraw.com/blog/end-to-end-encryption
-            - img [ref=e171]
-        - button "Help" [ref=e174] [cursor=pointer]:
-          - img [ref=e175]
-    - generic:
-      - img
-    - generic [ref=e180]: Drawing canvas

.playwright-mcp/page-2026-06-26T08-26-34-790Z.yml

@@ -1,126 +0,0 @@
-- generic [ref=e1]:
-  - banner:
-    - heading "Excalidraw" [level=1] [ref=e2]
-  - generic [ref=e5]:
-    - generic:
-      - generic:
-        - generic:
-          - generic:
-            - img
-            - img
-        - generic:
-          - text: Your drawings are saved in your browser's storage.
-          - text: Browser storage can be cleared unexpectedly.
-          - text: Save your work to a file regularly to avoid losing it.
-        - generic:
-          - button "Open Ctrl+O" [ref=e181] [cursor=pointer]:
-            - img [ref=e183]
-            - generic [ref=e185]: Open
-            - generic [ref=e186]: Ctrl+O
-          - button "Help ?" [ref=e187] [cursor=pointer]:
-            - img [ref=e189]
-            - generic [ref=e194]: Help
-            - generic [ref=e195]: "?"
-          - button "Live collaboration..." [ref=e196] [cursor=pointer]:
-            - img [ref=e198]
-            - generic [ref=e205]: Live collaboration...
-          - link "Sign up" [ref=e206] [cursor=pointer]:
-            - /url: https://plus.excalidraw.com/plus?utm_source=excalidraw&utm_medium=app&utm_content=welcomeScreenGuest
-            - img [ref=e208]
-            - generic [ref=e214]: Sign up
-      - generic:
-        - generic:
-          - button [ref=e9] [cursor=pointer]:
-            - img [ref=e10]
-          - region "Shapes":
-            - generic [ref=e16]:
-              - generic:
-                - generic:
-                  - text: To move canvas, hold
-                  - generic: Scroll wheel
-                  - text: or
-                  - generic: Space
-                  - text: while dragging, or use the hand tool
-              - heading "Shapes" [level=2] [ref=e17]
-              - generic [ref=e18]:
-                - generic "Keep selected tool active after drawing — Q" [ref=e19] [cursor=pointer]:
-                  - checkbox "Keep selected tool active after drawing"
-                  - img [ref=e21]
-                - generic "Hand (panning tool) — H or null" [ref=e29] [cursor=pointer]:
-                  - radio "Hand (panning tool)"
-                  - img [ref=e31]
-                - generic "Selection" [ref=e215] [cursor=pointer]:
-                  - radio "Selection" [checked]
-                  - img [ref=e217]
-                - generic "Rectangle — R or 2" [ref=e46] [cursor=pointer]:
-                  - radio "Rectangle"
-                  - img [ref=e48]
-                - generic "Diamond — D or 3" [ref=e53] [cursor=pointer]:
-                  - radio "Diamond"
-                  - img [ref=e55]
-                - generic "Ellipse — O or 4" [ref=e60] [cursor=pointer]:
-                  - radio "Ellipse"
-                  - img [ref=e62]
-                - generic "Arrow — A or 5" [ref=e67] [cursor=pointer]:
-                  - radio "Arrow"
-                  - img [ref=e69]
-                - generic "Line — L or 6" [ref=e75] [cursor=pointer]:
-                  - radio "Line"
-                  - img [ref=e77]
-                - generic "Draw — P or 7" [ref=e79] [cursor=pointer]:
-                  - radio "Draw"
-                  - img [ref=e81]
-                - generic "Text — T or 8" [ref=e86] [cursor=pointer]:
-                  - radio "Text"
-                  - img [ref=e88]
-                - generic "Insert image — 9" [ref=e94] [cursor=pointer]:
-                  - radio "Insert image"
-                  - img [ref=e96]
-                - generic "Eraser — E or 0" [ref=e102] [cursor=pointer]:
-                  - radio "Eraser"
-                  - img [ref=e104]
-                - button "More tools" [ref=e112] [cursor=pointer]:
-                  - img [ref=e113]
-          - generic:
-            - button "Live collaboration..." [ref=e121] [cursor=pointer]:
-              - img [ref=e122]
-            - generic "Library" [ref=e124]:
-              - checkbox "Library"
-              - img [ref=e127] [cursor=pointer]
-      - contentinfo:
-        - region "Canvas actions" [ref=e132]:
-          - heading "Canvas actions" [level=2] [ref=e133]
-          - generic [ref=e135]:
-            - button "Zoom out" [ref=e136] [cursor=pointer]:
-              - img [ref=e138]
-            - button "Reset zoom" [disabled] [ref=e140]: 100%
-            - button "Zoom in" [ref=e141] [cursor=pointer]:
-              - img [ref=e143]
-          - generic [ref=e145]:
-            - button "Undo" [disabled] [ref=e148]:
-              - img [ref=e150]
-            - button "Redo" [disabled] [ref=e154]:
-              - img [ref=e156]
-        - generic [ref=e158]:
-          - generic [ref=e159]:
-            - button "disable scroll lock" [active] [ref=e222] [cursor=pointer]
-            - generic [ref=e161]:
-              - text: overscroll
-              - spinbutton "overscroll" [ref=e162]: "0.2"
-            - generic [ref=e163]:
-              - text: zoom factor
-              - spinbutton "zoom factor" [ref=e164]: "0.2"
-            - generic [ref=e165]:
-              - checkbox "lock zoom" [ref=e166]
-              - text: lock zoom
-            - generic [ref=e167]:
-              - checkbox "animate" [ref=e168]
-              - text: animate
-          - link "Blog post on end-to-end encryption in Excalidraw" [ref=e169] [cursor=pointer]:
-            - /url: https://plus.excalidraw.com/blog/end-to-end-encryption
-            - img [ref=e171]
-        - button "Help" [ref=e174] [cursor=pointer]:
-          - img [ref=e175]
-    - generic:
-      - img
-    - generic [ref=e180]: Drawing canvas

dev-docs/docs/codebase/transactions.mdx

@@ -0,0 +1,125 @@
+# Transactions
+
+Transactions let many live scene updates render immediately while still committing a single durable history entry.
+
+Typical use case:
+
+- AI streaming emits many `NEVER` updates for real-time feedback.
+- Those updates advance the live scene and store snapshot, but do not create undo history.
+- A transaction records the intended logical delta separately, then commits one synthetic durable increment at the end.
+
+## Key Files
+
+### `packages/excalidraw/transaction/`
+
+- `transaction.ts`
+  - `Transaction` is the per-tx instance.
+  - `updateScene()` applies live updates with `captureUpdate: NEVER`.
+  - `updateElements()` is a typed partial-patch helper over `updateScene()`.
+  - `commit()` builds synthetic snapshots and commits one durable entry.
+  - `cancel()` ends the tx without committing history.
+- `ledger.ts`
+  - `TransactionLedger` keeps per-element baseline, target, and touched props across tx steps.
+  - `buildSyntheticSnapshots()` reconciles tx intent with the live scene using `live-wins-per-prop`.
+- `undoOverridePlanner.ts`
+  - Tracks tx intermediate values.
+  - Produces undo override candidates for regular user history entries that were recorded while a tx was active.
+- `manager.ts`
+  - Owns tx lifecycle state and active-tx priority.
+  - Injects tx undo markers into durable deltas at record time.
+  - Resolves effective history deltas at undo/redo time.
+- `diff.ts` / `types.ts`
+  - Shared diff helpers and transaction-specific types.
+
+### `packages/element/src/store.ts`
+
+- `store.commitSyntheticIncrement()`
+  - Builds `StoreSnapshot -> StoreChange -> StoreDelta` from logical before/after snapshots.
+  - Commits the synthetic durable increment immediately through an isolated path.
+  - Does not flush unrelated pending micro actions.
+- `StoreDelta.markers`
+  - Carries extra history markers such as `txUndoOverrides`.
+
+### `packages/excalidraw/history.ts`
+
+- `onBeforeRecord()`
+  - Lets the transaction manager attach markers before a durable delta becomes a history entry.
+- `setEffectiveDeltaResolver()`
+  - Lets the transaction manager rewrite a history delta at undo/redo time before it is applied.
+
+## Flow
+
+1. Caller creates a transaction.
+2. `tx.updateScene()` applies live updates with `NEVER`.
+3. The ledger records net element changes; appState intent is accumulated separately.
+4. Regular user durable edits that happen while the tx is active may receive tx undo markers.
+5. `tx.commit()` asks the ledger for logical before/after snapshots and calls `store.commitSyntheticIncrement()`.
+6. Undo/redo later uses the manager's effective-delta resolver to decide whether ended tx markers should patch the baseline of a regular history entry.
+
+Result:
+
+- live rendering stays immediate;
+- one tx still produces one durable history entry;
+- interleaved regular edits can undo back to the correct pre-tx baseline.
+
+## Undo Examples
+
+### Interleaved Regular Edit
+
+1. Baseline: `rect = (x: 0, stroke: black)`
+2. Tx updates it live to `(x: 200, stroke: red)` with `NEVER`
+3. User makes a regular durable edit: `(x: 200, stroke: purple)`
+4. Tx commits; live stays purple
+
+The user history entry was recorded while the tx was active, so its local baseline is `red`.
+If undo later runs after the tx has ended, restoring `red` is wrong: the correct pre-tx baseline is `black`.
+
+To fix this:
+
+- record-time attaches a tx undo marker to the user history entry
+- perform-time checks whether the tx has already ended
+- if ended, the effective delta is patched so undo restores `black` instead of `red`
+
+### Active Tx vs Ended Tx
+
+Using the same example:
+
+- if the user undoes while the tx is still active, the marker stays inactive and undo restores the tx intermediate value (`red`)
+- if the user undoes after the tx has ended, the marker becomes active and undo restores the pre-tx baseline (`black`)
+
+So markers are recorded early, but applied conditionally.
+
+## AppState
+
+Elements use ledger snapshots. AppState does not.
+
+The transaction instead keeps:
+
+- `initialAppState`: observed appState at tx start
+- `accumulatedAppState`: merged caller intent from `tx.updateScene({ appState })`
+
+At commit, the transaction computes the final appState patch and passes it into `store.commitSyntheticIncrement()`.
+
+## Example
+
+```ts
+const tx = app.transactionManager.create();
+
+tx.updateScene({ elements: updatedElementsA });
+tx.updateScene({ elements: updatedElementsB });
+tx.updateElements({
+  elements: [
+    { id: "rect-1", type: "rectangle", updates: { strokeColor: "#f00" } },
+    { id: "rect-2", type: "rectangle", updates: { x: 120 } },
+  ],
+});
+
+tx.commit();
+```
+
+## Notes
+
+- `commit()` and `cancel()` are idempotent.
+- `updateScene()` and `updateElements()` throw after the tx has ended.
+- Conflict handling inside synthetic snapshots is fixed to `live-wins-per-prop`.
+- Multi-tx interleaving is supported through manager-owned lifecycle tracking and active-tx priority.

dev-docs/docusaurus.config.js

@@ -97,8 +97,8 @@ const config = {
                 href: "https://discord.gg/UexuTaE",
               },
               {
-                label: "Twitter",
+                label: "𝕏",
-                href: "https://twitter.com/excalidraw",
+                href: "https://x.com/excalidraw",
               },
               {
                 label: "Linkedin",

examples/with-nextjs/src/excalidrawWrapper.tsx

@@ -4,20 +4,8 @@ import { Excalidraw } from "@excalidraw/excalidraw";
 
 import "@excalidraw/excalidraw/index.css";
 
-import type { ScrollConstraints } from "@excalidraw/excalidraw/types";
-
 import App from "../../with-script-in-browser/components/ExampleApp";
 
-const scrollConstraints: ScrollConstraints = {
-  x: 0,
-  y: 0,
-  width: 850,
-  height: 400,
-  lockZoom: true,
-  overscrollAllowance: 0,
-  viewportZoomFactor: 1,
-};
-
 const ExcalidrawWrapper: React.FC = () => {
   return (
     <>
@@ -26,7 +14,7 @@ const ExcalidrawWrapper: React.FC = () => {
         useCustom={(api: any, args?: any[]) => {}}
         excalidrawLib={excalidrawLib}
       >
-        <Excalidraw scrollConstraints={scrollConstraints} />
+        <Excalidraw />
       </App>
     </>
   );

examples/with-script-in-browser/components/ExampleApp.tsx

@@ -178,8 +178,7 @@ export default function ExampleApp({
     const newElement = cloneElement(
       Excalidraw,
       {
-        onExcalidrawAPI: (api: ExcalidrawImperativeAPI | null) =>
+        excalidrawAPI: (api: ExcalidrawImperativeAPI) => setExcalidrawAPI(api),
-          setExcalidrawAPI(api),
         initialData: initialStatePromiseRef.current.promise,
         onChange: (
           elements: NonDeletedExcalidrawElement[],
@@ -821,48 +820,6 @@ export default function ExampleApp({
             />
             Export with embed scene
           </label>
-          <button
-            type="button"
-            onClick={() => {
-              if (!excalidrawAPI) {
-                return;
-              }
-
-              const elements = excalidrawAPI.getSceneElements();
-              excalidrawAPI.scrollToContent(elements[0], {
-                animate: true,
-                fitToViewport: true,
-                viewportZoomFactor: 0.9,
-                scrollLock: {
-                  lockZoom: true,
-                  overscrollAllowance: 0,
-                },
-              });
-            }}
-          >
-            Fit and lock first element
-          </button>
-          <button
-            type="button"
-            onClick={() => {
-              if (!excalidrawAPI) {
-                return;
-              }
-
-              const elements = excalidrawAPI.getSceneElements();
-              excalidrawAPI.scrollToContent(elements[1], {
-                animate: true,
-                fitToViewport: true,
-                viewportZoomFactor: 0.9,
-                scrollLock: {
-                  lockZoom: true,
-                  overscrollAllowance: 0,
-                },
-              });
-            }}
-          >
-            Fit and lock second element
-          </button>
           <button
             onClick={async () => {
               if (!excalidrawAPI) {

excalidraw-app/App.tsx

@@ -1015,10 +1015,7 @@ const ExcalidrawWrapper = () => {
             </OverwriteConfirmDialog.Action>
           )}
         </OverwriteConfirmDialog>
-        <AppFooter
+        <AppFooter onChange={() => excalidrawAPI?.refresh()} />
-          excalidrawAPI={excalidrawAPI}
-          onChange={() => excalidrawAPI?.refresh()}
-        />
         {excalidrawAPI && <AIComponents excalidrawAPI={excalidrawAPI} />}
 
         <TTDDialogTrigger />

excalidraw-app/components/AppFooter.tsx

@@ -1,178 +1,13 @@
 import { Footer } from "@excalidraw/excalidraw/index";
-import {
+import React from "react";
-  getCommonBounds,
-  getSelectedElements,
-  getVisibleSceneBounds,
-} from "@excalidraw/element";
-import React, { useCallback, useState } from "react";
-
-import type {
-  ExcalidrawImperativeAPI,
-  ScrollConstraints,
-} from "@excalidraw/excalidraw/types";
 
 import { isExcalidrawPlusSignedUser } from "../app_constants";
 
 import { DebugFooter, isVisualDebuggerEnabled } from "./DebugCanvas";
 import { EncryptedIcon } from "./EncryptedIcon";
 
-type ScrollConstraintOptions = Pick<
-  ScrollConstraints,
-  "lockZoom" | "overscrollAllowance" | "viewportZoomFactor"
->;
-
-const ScrollConstraintsDebugFooter = ({
-  excalidrawAPI,
-}: {
-  excalidrawAPI: ExcalidrawImperativeAPI | null;
-}) => {
-  const [activeLock, setActiveLock] = useState<ScrollConstraints | null>(null);
-  const [options, setOptions] = useState<ScrollConstraintOptions>({
-    lockZoom: false,
-    overscrollAllowance: 0.2,
-    viewportZoomFactor: 0.2,
-  });
-
-  const setLock = useCallback(
-    (nextLock: ScrollConstraints) => {
-      excalidrawAPI?.setScrollConstraints(nextLock);
-      setActiveLock(nextLock);
-    },
-    [excalidrawAPI],
-  );
-
-  const toggleScrollLock = useCallback(() => {
-    if (!excalidrawAPI) {
-      return;
-    }
-
-    if (activeLock) {
-      excalidrawAPI.setScrollConstraints(null);
-      setActiveLock(null);
-      return;
-    }
-
-    const selectedElements = getSelectedElements(
-      excalidrawAPI.getSceneElements(),
-      excalidrawAPI.getAppState(),
-      {
-        includeBoundTextElement: true,
-        includeElementsInFrames: true,
-      },
-    );
-    const [x1, y1, x2, y2] = selectedElements.length
-      ? getCommonBounds(
-          selectedElements,
-          excalidrawAPI.getSceneElementsMapIncludingDeleted(),
-        )
-      : getVisibleSceneBounds(excalidrawAPI.getAppState());
-
-    setLock({
-      x: x1,
-      y: y1,
-      width: x2 - x1,
-      height: y2 - y1,
-      ...options,
-    });
-  }, [activeLock, excalidrawAPI, options, setLock]);
-
-  const updateOptions = useCallback(
-    (nextOptions: ScrollConstraintOptions) => {
-      setOptions(nextOptions);
-
-      if (activeLock) {
-        setLock({ ...activeLock, ...nextOptions });
-      }
-    },
-    [activeLock, setLock],
-  );
-
-  const updateNumberOption = useCallback(
-    (option: "overscrollAllowance" | "viewportZoomFactor", value: string) => {
-      updateOptions({
-        ...options,
-        [option]: value === "" ? undefined : Number(value),
-      });
-    },
-    [options, updateOptions],
-  );
-
-  const updateBooleanOption = useCallback(
-    (option: "lockZoom", value: boolean) => {
-      updateOptions({
-        ...options,
-        [option]: value,
-      });
-    },
-    [options, updateOptions],
-  );
-
-  return (
-    <div
-      style={{
-        display: "flex",
-        gap: ".45rem",
-        alignItems: "center",
-        padding: "0 .35rem",
-        fontSize: 12,
-      }}
-    >
-      <button
-        className="ToolIcon_type_button"
-        type="button"
-        onClick={toggleScrollLock}
-      >
-        {activeLock ? "disable scroll lock" : "lock scroll"}
-      </button>
-      <label style={{ display: "flex", gap: ".25rem", alignItems: "center" }}>
-        overscroll
-        <input
-          type="number"
-          min={0}
-          max={1}
-          step={0.05}
-          value={options.overscrollAllowance ?? ""}
-          onChange={(event) =>
-            updateNumberOption("overscrollAllowance", event.target.value)
-          }
-          style={{ width: 56 }}
-        />
-      </label>
-      <label style={{ display: "flex", gap: ".25rem", alignItems: "center" }}>
-        zoom factor
-        <input
-          type="number"
-          min={0.1}
-          step={0.1}
-          value={options.viewportZoomFactor ?? ""}
-          onChange={(event) =>
-            updateNumberOption("viewportZoomFactor", event.target.value)
-          }
-          style={{ width: 56 }}
-        />
-      </label>
-      <label style={{ display: "flex", gap: ".2rem", alignItems: "center" }}>
-        <input
-          type="checkbox"
-          checked={!!options.lockZoom}
-          onChange={(event) =>
-            updateBooleanOption("lockZoom", event.target.checked)
-          }
-        />
-        lock zoom
-      </label>
-    </div>
-  );
-};
-
 export const AppFooter = React.memo(
-  ({
+  ({ onChange }: { onChange: () => void }) => {
-    excalidrawAPI,
-    onChange,
-  }: {
-    excalidrawAPI: ExcalidrawImperativeAPI | null;
-    onChange: () => void;
-  }) => {
     return (
       <Footer>
         <div
@@ -182,7 +17,6 @@ export const AppFooter = React.memo(
             alignItems: "center",
           }}
         >
-          <ScrollConstraintsDebugFooter excalidrawAPI={excalidrawAPI} />
           {isVisualDebuggerEnabled() && <DebugFooter onChange={onChange} />}
           {!isExcalidrawPlusSignedUser && <EncryptedIcon />}
         </div>

packages/element/src/store.ts

@@ -111,6 +111,67 @@ export class Store {
     this.scheduleAction(CaptureUpdateAction.IMMEDIATELY);
   }
 
+  /**
+   * Commits a synthetic durable history entry without changing the live scene.
+   *
+   * Builds StoreSnapshot → StoreChange → StoreDelta from the provided
+   * logical before/after element maps and optional appState patches, then
+   * emits the resulting durable increment immediately through an isolated
+   * path that does not flush pending micro actions.
+   *
+   * appState patches are merged on top of the current observed appState
+   * baseline so only the provided keys participate in the synthetic diff.
+   */
+  public commitSyntheticIncrement(params: {
+    logicalBefore: {
+      elements: SceneElementsMap;
+      appState?: Partial<ObservedAppState>;
+    };
+    logicalAfter: {
+      elements: SceneElementsMap;
+      appState?: Partial<ObservedAppState>;
+    };
+  }): boolean {
+    const { logicalBefore, logicalAfter } = params;
+    const observedAppStateBaseline = this.snapshot.appState;
+    const syntheticAppStateBefore = logicalBefore.appState
+      ? { ...observedAppStateBaseline, ...logicalBefore.appState }
+      : observedAppStateBaseline;
+    const syntheticAppStateAfter = logicalAfter.appState
+      ? { ...observedAppStateBaseline, ...logicalAfter.appState }
+      : observedAppStateBaseline;
+    const didAppStateChange = Delta.isRightDifferent(
+      syntheticAppStateBefore,
+      syntheticAppStateAfter,
+    );
+    const prevSnapshot = StoreSnapshot.create(
+      logicalBefore.elements,
+      syntheticAppStateBefore,
+      {
+        didElementsChange: true,
+        didAppStateChange,
+      },
+    );
+    const nextSnapshot = StoreSnapshot.create(
+      logicalAfter.elements,
+      syntheticAppStateAfter,
+      {
+        didElementsChange: true,
+        didAppStateChange,
+      },
+    );
+    const change = StoreChange.create(prevSnapshot, nextSnapshot);
+    const delta = StoreDelta.calculate(prevSnapshot, nextSnapshot);
+
+    if (delta.isEmpty()) {
+      return false;
+    }
+
+    this.emitIsolatedDurableIncrement(change, delta);
+
+    return true;
+  }
+
   /**
    * Schedule special "micro" actions, to-be executed before the next commit, before it executes a scheduled "macro" action.
    */
@@ -206,6 +267,7 @@ export class Store {
   public clear(): void {
     this.snapshot = StoreSnapshot.empty();
     this.scheduledMacroActions = new Set();
+    this.scheduledMicroActions = [];
   }
 
   /**
@@ -245,6 +307,24 @@ export class Store {
     }
   }
 
+  /**
+   * Emits a synthetic durable increment immediately without draining the
+   * regular micro-action queue.
+   */
+  private emitIsolatedDurableIncrement(change: StoreChange, delta: StoreDelta) {
+    const nextSnapshot = this.applyChangeToSnapshot(change);
+
+    if (!nextSnapshot) {
+      return;
+    }
+
+    try {
+      this.emitDurableIncrement(nextSnapshot, change, delta);
+    } finally {
+      this.snapshot = nextSnapshot;
+    }
+  }
+
   /**
    * Performs change calculation and emits an ephemeral increment.
    *
@@ -491,6 +571,89 @@ export class EphemeralIncrement extends StoreIncrement {
   }
 }
 
+/**
+ * Serializable delta marker used to recover pre-tx undo baselines
+ * without rewriting history stack entries.
+ */
+export type TxUndoOverride = {
+  txId: string;
+  elementId: string;
+  prop: string;
+  expectedInsertedValue: unknown;
+  preTxBaselineValue: unknown;
+  consumedKey: string;
+};
+
+export type StoreDeltaMarkers = {
+  txUndoOverrides?: TxUndoOverride[];
+};
+
+const cloneTxUndoOverride = (override: TxUndoOverride): TxUndoOverride => ({
+  ...override,
+});
+
+const cloneStoreDeltaMarkers = (
+  markers: StoreDeltaMarkers | undefined,
+): StoreDeltaMarkers | undefined =>
+  markers
+    ? {
+        ...markers,
+        txUndoOverrides: markers.txUndoOverrides?.map(cloneTxUndoOverride),
+      }
+    : undefined;
+
+const pruneStoreDeltaMarkers = (delta: StoreDelta) => {
+  const txUndoOverrides = delta.markers?.txUndoOverrides;
+  if (!txUndoOverrides || txUndoOverrides.length === 0) {
+    return;
+  }
+
+  const updatedEntries = delta.elements.updated as Record<
+    string,
+    Delta<Record<string, unknown>>
+  >;
+  const nextTxUndoOverrides = txUndoOverrides.filter((override) => {
+    const updatedEntry = updatedEntries[override.elementId];
+    return (
+      !!updatedEntry &&
+      Object.prototype.hasOwnProperty.call(updatedEntry.inserted, override.prop)
+    );
+  });
+
+  if (nextTxUndoOverrides.length === txUndoOverrides.length) {
+    return;
+  }
+
+  if (nextTxUndoOverrides.length === 0) {
+    delta.markers = undefined;
+    return;
+  }
+
+  delta.markers = {
+    ...delta.markers,
+    txUndoOverrides: nextTxUndoOverrides.map(cloneTxUndoOverride),
+  };
+};
+
+export const mergeStoreDeltaMarkers = (
+  delta: StoreDelta,
+  markers: StoreDeltaMarkers,
+) => {
+  const txUndoOverrides = markers.txUndoOverrides ?? [];
+  if (txUndoOverrides.length === 0) {
+    return;
+  }
+
+  const existing = delta.markers?.txUndoOverrides ?? [];
+  delta.markers = {
+    ...delta.markers,
+    txUndoOverrides: [
+      ...existing.map(cloneTxUndoOverride),
+      ...txUndoOverrides.map(cloneTxUndoOverride),
+    ],
+  };
+};
+
 /**
  * Represents a captured delta by the Store.
  */
@@ -499,6 +662,7 @@ export class StoreDelta {
     public readonly id: string,
     public readonly elements: ElementsDelta,
     public readonly appState: AppStateDelta,
+    public markers?: StoreDeltaMarkers,
   ) {}
 
   /**
@@ -508,12 +672,16 @@ export class StoreDelta {
     elements: ElementsDelta,
     appState: AppStateDelta,
     opts: {
-      id: string;
+      id?: string;
-    } = {
+      markers?: StoreDeltaMarkers;
-      id: randomId(),
+    } = {},
-    },
   ) {
-    return new this(opts.id, elements, appState);
+    return new this(
+      opts.id ?? randomId(),
+      elements,
+      appState,
+      cloneStoreDeltaMarkers(opts.markers),
+    );
   }
 
   /**
@@ -538,11 +706,12 @@ export class StoreDelta {
    * Restore a store delta instance from a DTO.
    */
   public static restore(storeDeltaDTO: DTO<StoreDelta>) {
-    const { id, elements, appState } = storeDeltaDTO;
+    const { id, elements, appState, markers } = storeDeltaDTO;
     return new this(
       id,
       ElementsDelta.restore(elements),
       AppStateDelta.restore(appState),
+      cloneStoreDeltaMarkers(markers),
     );
   }
 
@@ -553,11 +722,12 @@ export class StoreDelta {
     id,
     elements: { added, removed, updated },
     appState: { delta: appStateDelta },
+    markers,
   }: DTO<StoreDelta>) {
     const elements = ElementsDelta.create(added, removed, updated);
     const appState = AppStateDelta.create(appStateDelta);
 
-    return new this(id, elements, appState);
+    return new this(id, elements, appState, cloneStoreDeltaMarkers(markers));
   }
 
   /**
@@ -569,8 +739,10 @@ export class StoreDelta {
     for (const delta of deltas) {
       aggregatedDelta.elements.squash(delta.elements);
       aggregatedDelta.appState.squash(delta.appState);
+      mergeStoreDeltaMarkers(aggregatedDelta, delta.markers ?? {});
     }
 
+    pruneStoreDeltaMarkers(aggregatedDelta);
     return aggregatedDelta;
   }
 
@@ -578,7 +750,12 @@ export class StoreDelta {
    * Inverse store delta, creates new instance of `StoreDelta`.
    */
   public static inverse(delta: StoreDelta) {
-    return this.create(delta.elements.inverse(), delta.appState.inverse());
+    const inversed = this.create(
+      delta.elements.inverse(),
+      delta.appState.inverse(),
+      { markers: delta.markers },
+    );
+    return inversed;
   }
 
   /**
@@ -614,7 +791,7 @@ export class StoreDelta {
     nextElements: SceneElementsMap,
     modifierOptions?: "deleted" | "inserted",
   ): StoreDelta {
-    return this.create(
+    const nextDelta = this.create(
       delta.elements.applyLatestChanges(
         prevElements,
         nextElements,
@@ -623,8 +800,11 @@ export class StoreDelta {
       delta.appState,
       {
         id: delta.id,
+        markers: delta.markers,
       },
     );
+    pruneStoreDeltaMarkers(nextDelta);
+    return nextDelta;
   }
 
   public static empty() {

packages/element/tests/store.test.ts

@@ -0,0 +1,140 @@
+import { API } from "@excalidraw/excalidraw/tests/helpers/api";
+
+import { arrayToMap } from "@excalidraw/common";
+
+import type App from "@excalidraw/excalidraw/components/App";
+
+import type { ObservedAppState } from "@excalidraw/excalidraw/types";
+import type {
+  ExcalidrawElement,
+  SceneElementsMap,
+} from "@excalidraw/element/types";
+
+import {
+  CaptureUpdateAction,
+  Store,
+  StoreSnapshot,
+  newElementWith,
+} from "../src";
+
+const getScheduledMicroActionCount = (store: Store) =>
+  (
+    store as unknown as {
+      scheduledMicroActions: Array<() => void>;
+    }
+  ).scheduledMicroActions.length;
+
+const flushMicroActions = (store: Store) => {
+  (
+    store as unknown as {
+      flushMicroActions: () => void;
+    }
+  ).flushMicroActions();
+};
+
+const toSceneElementsMap = (
+  elements: readonly ExcalidrawElement[],
+): SceneElementsMap => arrayToMap(elements) as SceneElementsMap;
+
+const createStoreHarness = (elements: SceneElementsMap) => {
+  const appState: ObservedAppState = StoreSnapshot.empty().appState;
+  const app = {
+    scene: {
+      getElementsMapIncludingDeleted: () => elements,
+    },
+    state: appState,
+  } as unknown as App;
+
+  const store = new Store(app);
+  store.snapshot = StoreSnapshot.create(elements, appState);
+
+  return { store, appState };
+};
+
+describe("Store synthetic increment isolation", () => {
+  it("keeps pending immediate micro actions queued across synthetic commit", () => {
+    const element = API.createElement({
+      type: "rectangle",
+      id: "store-isolated-immediate",
+      x: 0,
+      y: 0,
+    });
+    const baselineElements = toSceneElementsMap([element]);
+    const { store } = createStoreHarness(baselineElements);
+
+    const incrementTypes: Array<"durable" | "ephemeral"> = [];
+    const detach = store.onStoreIncrementEmitter.on((increment) => {
+      incrementTypes.push(increment.type);
+    });
+
+    store.scheduleMicroAction({
+      action: CaptureUpdateAction.IMMEDIATELY,
+      elements: [newElementWith(element, { y: 240 })],
+      appState: undefined,
+    });
+
+    expect(getScheduledMicroActionCount(store)).toBe(1);
+
+    const committed = store.commitSyntheticIncrement({
+      logicalBefore: {
+        elements: baselineElements,
+      },
+      logicalAfter: {
+        elements: toSceneElementsMap([newElementWith(element, { x: 120 })]),
+      },
+    });
+
+    expect(committed).toBe(true);
+    expect(incrementTypes).toEqual(["durable"]);
+    expect(getScheduledMicroActionCount(store)).toBe(1);
+
+    flushMicroActions(store);
+
+    expect(incrementTypes).toEqual(["durable", "durable"]);
+    expect(getScheduledMicroActionCount(store)).toBe(0);
+    detach();
+  });
+
+  it("keeps pending eventually micro actions queued across synthetic commit", () => {
+    const element = API.createElement({
+      type: "rectangle",
+      id: "store-isolated-eventually",
+      x: 0,
+      y: 0,
+    });
+    const baselineElements = toSceneElementsMap([element]);
+    const { store } = createStoreHarness(baselineElements);
+
+    const incrementTypes: Array<"durable" | "ephemeral"> = [];
+    const detach = store.onStoreIncrementEmitter.on((increment) => {
+      incrementTypes.push(increment.type);
+    });
+
+    store.scheduleMicroAction({
+      action: CaptureUpdateAction.EVENTUALLY,
+      elements: [newElementWith(element, { y: 240 })],
+      appState: undefined,
+    });
+
+    expect(getScheduledMicroActionCount(store)).toBe(1);
+
+    const committed = store.commitSyntheticIncrement({
+      logicalBefore: {
+        elements: baselineElements,
+      },
+      logicalAfter: {
+        elements: toSceneElementsMap([newElementWith(element, { x: 120 })]),
+      },
+    });
+
+    expect(committed).toBe(true);
+    expect(incrementTypes).toEqual(["durable"]);
+    expect(getScheduledMicroActionCount(store)).toBe(1);
+
+    flushMicroActions(store);
+
+    expect(incrementTypes).toEqual(["durable", "ephemeral"]);
+    expect(getScheduledMicroActionCount(store)).toBe(0);
+    detach();
+  });
+});

packages/excalidraw/actions/actionCanvas.tsx

@@ -40,7 +40,6 @@ import {
   ZoomResetIcon,
 } from "../components/icons";
 import { setCursor } from "../cursor";
-import { constrainScrollState } from "../scene/scrollConstraints";
 
 import { t } from "../i18n";
 import { getNormalizedZoom } from "../scene";
@@ -52,8 +51,6 @@ import { register } from "./register";
 
 import type { AppState, Offsets } from "../types";
 
-const canUseZoomActions = (appState: AppState) => !appState.scrollConstraints;
-
 export const actionChangeViewBackgroundColor = register<Partial<AppState>>({
   name: "changeViewBackgroundColor",
   label: "labels.canvasBackground",
@@ -142,7 +139,7 @@ export const actionZoomIn = register({
   trackEvent: { category: "canvas" },
   perform: (_elements, appState, _, app) => {
     return {
-      appState: constrainScrollState({
+      appState: {
         ...appState,
         ...getStateForZoom(
           {
@@ -153,7 +150,7 @@ export const actionZoomIn = register({
           appState,
         ),
         userToFollow: null,
-      }),
+      },
       captureUpdate: CaptureUpdateAction.EVENTUALLY,
     };
   },
@@ -183,7 +180,7 @@ export const actionZoomOut = register({
   trackEvent: { category: "canvas" },
   perform: (_elements, appState, _, app) => {
     return {
-      appState: constrainScrollState({
+      appState: {
         ...appState,
         ...getStateForZoom(
           {
@@ -194,7 +191,7 @@ export const actionZoomOut = register({
           appState,
         ),
         userToFollow: null,
-      }),
+      },
       captureUpdate: CaptureUpdateAction.EVENTUALLY,
     };
   },
@@ -246,7 +243,6 @@ export const actionResetZoom = register({
         className="reset-zoom-button zoom-button"
         title={t("buttons.resetZoom")}
         aria-label={t("buttons.resetZoom")}
-        disabled={!canUseZoomActions(appState)}
         onClick={() => {
           updateData(null);
         }}
@@ -255,7 +251,6 @@ export const actionResetZoom = register({
       </ToolButton>
     </Tooltip>
   ),
-  predicate: (_elements, appState) => canUseZoomActions(appState),
   keyTest: (event) =>
     (event.code === CODES.ZERO || event.code === CODES.NUM_ZERO) &&
     (event[KEYS.CTRL_OR_CMD] || event.shiftKey),
@@ -279,7 +274,7 @@ const zoomValueToFitBoundsOnViewport = (
   return Math.min(adjustedZoomValue, 1);
 };
 
-export function resolveViewportForBounds({
+export const zoomToFitBounds = ({
   bounds,
   appState,
   canvasOffsets,
@@ -297,7 +292,7 @@ export function resolveViewportForBounds({
   viewportZoomFactor?: number;
   minZoom?: number;
   maxZoom?: number;
-}) {
+}) => {
   viewportZoomFactor = clamp(viewportZoomFactor, MIN_ZOOM, MAX_ZOOM);
 
   const [x1, y1, x2, y2] = bounds;
@@ -350,58 +345,12 @@ export function resolveViewportForBounds({
     zoom: { value: newZoomValue },
   });
 
-  return {
-    bounds,
-    scrollX: centerScroll.scrollX,
-    scrollY: centerScroll.scrollY,
-    zoom: { value: newZoomValue },
-    viewportZoomFactor,
-    viewportDimensions: {
-      width: appState.width,
-      height: appState.height,
-    },
-    effectiveViewportDimensions: {
-      width: effectiveCanvasWidth,
-      height: effectiveCanvasHeight,
-    },
-  };
-}
-
-export const zoomToFitBounds = ({
-  bounds,
-  appState,
-  canvasOffsets,
-  fitToViewport = false,
-  viewportZoomFactor = 1,
-  minZoom = -Infinity,
-  maxZoom = Infinity,
-}: {
-  bounds: SceneBounds;
-  canvasOffsets?: Offsets;
-  appState: Readonly<AppState>;
-  /** whether to fit content to viewport (beyond >100%) */
-  fitToViewport: boolean;
-  /** zoom content to cover X of the viewport, when fitToViewport=true */
-  viewportZoomFactor?: number;
-  minZoom?: number;
-  maxZoom?: number;
-}) => {
-  const resolvedViewport = resolveViewportForBounds({
-    bounds,
-    appState,
-    canvasOffsets,
-    fitToViewport,
-    viewportZoomFactor,
-    minZoom,
-    maxZoom,
-  });
-
   return {
     appState: {
       ...appState,
-      scrollX: resolvedViewport.scrollX,
+      scrollX: centerScroll.scrollX,
-      scrollY: resolvedViewport.scrollY,
+      scrollY: centerScroll.scrollY,
-      zoom: resolvedViewport.zoom,
+      zoom: { value: newZoomValue },
     },
     captureUpdate: CaptureUpdateAction.EVENTUALLY,
   };
@@ -459,7 +408,6 @@ export const actionZoomToFitSelectionInViewport = register({
       canvasOffsets: app.getEditorUIOffsets(),
     });
   },
-  predicate: (_elements, appState) => canUseZoomActions(appState),
   // NOTE shift-2 should have been assigned actionZoomToFitSelection.
   // TBD on how proceed
   keyTest: (event) =>
@@ -486,7 +434,6 @@ export const actionZoomToFitSelection = register({
       canvasOffsets: app.getEditorUIOffsets(),
     });
   },
-  predicate: (_elements, appState) => canUseZoomActions(appState),
   // NOTE this action should use shift-2 per figma, alas
   keyTest: (event) =>
     event.code === CODES.THREE &&
@@ -511,7 +458,6 @@ export const actionZoomToFit = register({
       fitToViewport: false,
       canvasOffsets: app.getEditorUIOffsets(),
     }),
-  predicate: (_elements, appState) => canUseZoomActions(appState),
   keyTest: (event) =>
     event.code === CODES.ONE &&
     event.shiftKey &&

packages/excalidraw/actions/actionGroup.tsx

@@ -49,18 +49,9 @@ import { register } from "./register";
 
 import type { AppClassProperties, AppState } from "../types";
 
-const allElementsInSameGroup = (
+const allElementsInSameGroup = (elements: readonly ExcalidrawElement[]) => {
-  elements: readonly ExcalidrawElement[],
-  editingGroupId: AppState["editingGroupId"],
-) => {
   if (elements.length >= 2) {
-    const editingGroupIndex = editingGroupId
+    const groupIds = elements[0].groupIds;
-      ? elements[0].groupIds.indexOf(editingGroupId)
-      : -1;
-    const groupIds =
-      editingGroupIndex > -1
-        ? elements[0].groupIds.slice(0, editingGroupIndex)
-        : elements[0].groupIds;
     for (const groupId of groupIds) {
       if (
         elements.reduce(
@@ -87,7 +78,7 @@ const enableActionGroup = (
 
   return (
     selectedElements.length >= 2 &&
-    !allElementsInSameGroup(selectedElements, appState.editingGroupId) &&
+    !allElementsInSameGroup(selectedElements) &&
     !frameAndChildrenSelectedTogether(selectedElements)
   );
 };

packages/excalidraw/actions/actionToggleSearchMenu.ts

@@ -53,5 +53,8 @@ export const actionToggleSearchMenu = register({
     };
   },
   checked: (appState: AppState) => appState.gridModeEnabled,
+  predicate: (element, appState, props) => {
+    return props.gridModeEnabled === undefined;
+  },
   keyTest: (event) => event[KEYS.CTRL_OR_CMD] && event.key === KEYS.F,
 });

packages/excalidraw/actions/manager.tsx

@@ -95,13 +95,6 @@ export class ActionManager {
           (action.name in canvasActions
             ? canvasActions[action.name as keyof typeof canvasActions]
             : true) &&
-          (!action.predicate ||
-            action.predicate(
-              this.getElementsIncludingDeleted(),
-              this.getAppState(),
-              this.app.props,
-              this.app,
-            )) &&
           action.keyTest &&
           action.keyTest(
             event,

packages/excalidraw/appState.ts

@@ -122,7 +122,6 @@ export const getDefaultAppState = (): Omit<
     objectsSnapModeEnabled: false,
     userToFollow: null,
     followedBy: new Set(),
-    scrollConstraints: null,
     isCropping: false,
     croppingElementId: null,
     searchMatches: null,
@@ -251,7 +250,6 @@ const APP_STATE_STORAGE_CONF = (<
   objectsSnapModeEnabled: { browser: true, export: false, server: false },
   userToFollow: { browser: false, export: false, server: false },
   followedBy: { browser: false, export: false, server: false },
-  scrollConstraints: { browser: true, export: false, server: false },
   isCropping: { browser: false, export: false, server: false },
   croppingElementId: { browser: false, export: false, server: false },
   searchMatches: { browser: false, export: false, server: false },

packages/excalidraw/components/App.tsx

@@ -326,10 +326,7 @@ import {
   actionToggleCropEditor,
 } from "../actions";
 import { actionWrapTextInContainer } from "../actions/actionBoundText";
-import {
+import { actionToggleHandTool, zoomToFit } from "../actions/actionCanvas";
-  actionToggleHandTool,
-  resolveViewportForBounds,
-} from "../actions/actionCanvas";
 import { actionPaste } from "../actions/actionClipboard";
 import { actionCopyElementLink } from "../actions/actionElementLink";
 import { actionUnlockAllElements } from "../actions/actionElementLock";
@@ -364,6 +361,7 @@ import { restoreAppState, restoreElements } from "../data/restore";
 import { getCenter, getDistance } from "../gesture";
 import { History } from "../history";
 import { defaultLang, getLanguage, languages, setLanguage, t } from "../i18n";
+import { TransactionManager } from "../transaction";
 
 import {
   calculateScrollCenter,
@@ -373,7 +371,7 @@ import {
   hasBackground,
   isSomeElementSelected,
 } from "../scene";
-import { getConstrainedZoomAnchor, getStateForZoom } from "../scene/zoom";
+import { getStateForZoom } from "../scene/zoom";
 import {
   dataURLToString,
   generateIdFromFile,
@@ -429,12 +427,6 @@ import { isMaybeMermaidDefinition } from "../mermaid";
 
 import { LassoTrail } from "../lasso";
 
-import {
-  constrainScrollState,
-  calculateConstrainedScrollCenter,
-  areCanvasTranslatesClose,
-  getScrollConstraintsForBounds,
-} from "../scene/scrollConstraints";
 import { EraserTrail } from "../eraser";
 
 import { getShortcutKey } from "../shortcut";
@@ -497,9 +489,6 @@ import type {
   CollaboratorPointer,
   ToolType,
   OnUserFollowedPayload,
-  ScrollConstraints,
-  AnimateTranslateCanvasValues,
-  ScrollToContentOptions,
   UnsubscribeCallback,
   EmbedsValidationStatus,
   ElementsPendingErasure,
@@ -552,7 +541,6 @@ const ExcalidrawAppStateContext = React.createContext<AppState>({
   height: 0,
   offsetLeft: 0,
   offsetTop: 0,
-  scrollConstraints: null,
 });
 ExcalidrawAppStateContext.displayName = "ExcalidrawAppStateContext";
 
@@ -607,20 +595,6 @@ let isDraggingScrollBar: boolean = false;
 let currentScrollBars: ScrollBars = { horizontal: null, vertical: null };
 let touchTimeout = 0;
 let invalidateContextMenu = false;
-let scrollConstraintsAnimationTimeout: ReturnType<typeof setTimeout> | null =
-  null;
-
-const areScrollConstraintsEqual = (
-  left: ScrollConstraints | null | undefined,
-  right: ScrollConstraints | null | undefined,
-) => {
-  return left === right || (!!left && !!right && isShallowEqual(left, right));
-};
-
-const SET_SCROLL_CONSTRAINTS_CONTROLLED_WARNING =
-  "Excalidraw: `setScrollConstraints()` is ignored when the `scrollConstraints` prop is controlled.";
-const SCROLL_TO_CONTENT_SCROLL_LOCK_CONTROLLED_WARNING =
-  "Excalidraw: `scrollToContent()` with `scrollLock` is ignored when the `scrollConstraints` prop is controlled.";
 
 /**
  * Map of youtube embed video states
@@ -664,7 +638,8 @@ class App extends React.Component<AppProps, AppState> {
   public library: AppClassProperties["library"];
   public libraryItemsFromStorage: LibraryItems | undefined;
   public id: string;
-  private store: Store;
+  public transactionManager: TransactionManager;
+  public store: Store;
   private history: History;
   public excalidrawContainerValue: {
     container: HTMLDivElement | null;
@@ -808,8 +783,6 @@ class App extends React.Component<AppProps, AppState> {
       onUserFollow: (cb) => this.onUserFollowEmitter.on(cb),
       onStateChange: this.onStateChange,
       onEvent: this.onEvent,
-      app: this,
-      setScrollConstraints: this.setScrollConstraints,
     };
     return api;
   }
@@ -824,7 +797,6 @@ class App extends React.Component<AppProps, AppState> {
       objectsSnapModeEnabled = false,
       theme = defaultAppState.theme,
       name = `${t("labels.untitled")}-${getDateTime()}`,
-      scrollConstraints,
     } = props;
 
     this.state = {
@@ -840,7 +812,6 @@ class App extends React.Component<AppProps, AppState> {
       name,
       width: window.innerWidth,
       height: window.innerHeight,
-      scrollConstraints: scrollConstraints ?? null,
     };
 
     this.refreshEditorInterface();
@@ -863,6 +834,8 @@ class App extends React.Component<AppProps, AppState> {
 
     this.store = new Store(this);
     this.history = new History(this.store);
+    this.transactionManager = new TransactionManager(this);
+    this.transactionManager.attachHistory(this.history);
 
     this.excalidrawContainerValue = {
       container: this.excalidrawContainerRef.current,
@@ -870,7 +843,6 @@ class App extends React.Component<AppProps, AppState> {
     };
 
     this.fonts = new Fonts(this.scene);
-    this.history = new History(this.store);
 
     this.actionManager.registerAll(actions);
     this.actionManager.registerAction(createUndoAction(this.history));
@@ -2976,13 +2948,7 @@ class App extends React.Component<AppProps, AppState> {
       toast: this.state.toast,
     };
 
-    if (this.props.scrollConstraints) {
+    if (initialData?.scrollToContent) {
-      restoredAppState = {
-        ...restoredAppState,
-        scrollConstraints: this.props.scrollConstraints,
-        ...calculateConstrainedScrollCenter(this.state, restoredAppState),
-      };
-    } else if (initialData?.scrollToContent) {
       restoredAppState = {
         ...restoredAppState,
         ...calculateScrollCenter(restoredElements, {
@@ -2991,18 +2957,10 @@ class App extends React.Component<AppProps, AppState> {
           height: this.state.height,
           offsetTop: this.state.offsetTop,
           offsetLeft: this.state.offsetLeft,
-          scrollConstraints: this.state.scrollConstraints,
         }),
       };
     }
 
-    if (initialData?.scrollX != null) {
-      restoredAppState.scrollX = initialData.scrollX;
-    }
-    if (initialData?.scrollY != null) {
-      restoredAppState.scrollY = initialData.scrollY;
-    }
-
     this.resetStore();
     this.resetHistory();
     this.syncActionResult({
@@ -3253,11 +3211,7 @@ class App extends React.Component<AppProps, AppState> {
       .forEach((element) => ShapeCache.delete(element));
     this.refreshEditorInterface();
     this.updateDOMRect();
-    if (this.state.scrollConstraints) {
+    this.setState({});
-      this.setState((state) => constrainScrollState(state));
-    } else {
-      this.setState({});
-    }
   });
 
   /** generally invoked only if fullscreen was invoked programmatically */
@@ -3507,15 +3461,6 @@ class App extends React.Component<AppProps, AppState> {
       this.setState({ viewModeEnabled: !!this.props.viewModeEnabled });
     }
 
-    if (
-      !areScrollConstraintsEqual(
-        prevProps.scrollConstraints,
-        this.props.scrollConstraints,
-      )
-    ) {
-      this.syncScrollConstraints(this.props.scrollConstraints ?? null);
-    }
-
     if (prevState.viewModeEnabled !== this.state.viewModeEnabled) {
       this.addEventListeners();
       this.deselectElements();
@@ -3576,33 +3521,6 @@ class App extends React.Component<AppProps, AppState> {
       this.props.onChange?.(elements, this.state, this.files);
       this.onChangeEmitter.trigger(elements, this.state, this.files);
     }
-
-    if (this.state.scrollConstraints?.animateOnNextUpdate) {
-      const newState = constrainScrollState(this.state, "rigid");
-      const fromValues = {
-        scrollX: this.state.scrollX,
-        scrollY: this.state.scrollY,
-        zoom: this.state.zoom.value,
-      };
-      const toValues = {
-        scrollX: newState.scrollX,
-        scrollY: newState.scrollY,
-        zoom: newState.zoom.value,
-      };
-
-      if (areCanvasTranslatesClose(fromValues, toValues)) {
-        return;
-      }
-
-      if (scrollConstraintsAnimationTimeout) {
-        clearTimeout(scrollConstraintsAnimationTimeout);
-      }
-
-      scrollConstraintsAnimationTimeout = setTimeout(() => {
-        this.cancelInProgressAnimation?.();
-        this.animateToConstrainedArea(fromValues, toValues);
-      }, 200);
-    }
   }
 
   private renderInteractiveSceneCallback = ({
@@ -4370,8 +4288,8 @@ class App extends React.Component<AppProps, AppState> {
      */
     value: number,
   ) => {
-    this.setState(
+    this.setState({
-      getStateForZoom(
+      ...getStateForZoom(
         {
           viewportX: this.state.width / 2 + this.state.offsetLeft,
           viewportY: this.state.height / 2 + this.state.offsetTop,
@@ -4379,13 +4297,11 @@ class App extends React.Component<AppProps, AppState> {
         },
         this.state,
       ),
-    );
+    });
   };
 
   private cancelInProgressAnimation: (() => void) | null = null;
 
-  private scrollToContentRequestId = 0;
-
   scrollToContent = (
     /**
      * target to scroll to
@@ -4397,13 +4313,30 @@ class App extends React.Component<AppProps, AppState> {
       | string
       | ExcalidrawElement
       | readonly ExcalidrawElement[] = this.scene.getNonDeletedElements(),
-    opts?: ScrollToContentOptions,
+    opts?: (
+      | {
+          fitToContent?: boolean;
+          fitToViewport?: never;
+          viewportZoomFactor?: number;
+          animate?: boolean;
+          duration?: number;
+        }
+      | {
+          fitToContent?: never;
+          fitToViewport?: boolean;
+          /** when fitToViewport=true, how much screen should the content cover,
+           * between 0.1 (10%) and 1 (100%)
+           */
+          viewportZoomFactor?: number;
+          animate?: boolean;
+          duration?: number;
+        }
+    ) & {
+      minZoom?: number;
+      maxZoom?: number;
+      canvasOffsets?: Offsets;
+    },
   ) => {
-    if (opts?.scrollLock && this.props.scrollConstraints !== undefined) {
-      console.warn(SCROLL_TO_CONTENT_SCROLL_LOCK_CONTROLLED_WARNING);
-      opts = { ...opts, scrollLock: undefined };
-    }
-
     if (typeof target === "string") {
       let id: string | null;
       if (isElementLink(target)) {
@@ -4415,29 +4348,10 @@ class App extends React.Component<AppProps, AppState> {
         const elements = this.scene.getElementsFromId(id);
 
         if (elements?.length) {
-          if (opts?.fitToViewport) {
+          this.scrollToContent(elements, {
-            this.scrollToContent(elements, {
+            fitToContent: opts?.fitToContent ?? true,
-              fitToViewport: true,
+            animate: opts?.animate ?? true,
-              viewportZoomFactor: opts.viewportZoomFactor,
+          });
-              animate: opts.animate ?? true,
-              duration: opts.duration,
-              scrollLock: opts.scrollLock,
-              minZoom: opts.minZoom,
-              maxZoom: opts.maxZoom,
-              canvasOffsets: opts.canvasOffsets,
-            });
-          } else {
-            this.scrollToContent(elements, {
-              fitToContent: opts?.fitToContent ?? true,
-              viewportZoomFactor: opts?.viewportZoomFactor,
-              animate: opts?.animate ?? true,
-              duration: opts?.duration,
-              scrollLock: opts?.scrollLock,
-              minZoom: opts?.minZoom,
-              maxZoom: opts?.maxZoom,
-              canvasOffsets: opts?.canvasOffsets,
-            });
-          }
         } else if (isElementLink(target)) {
           this.setState({
             toast: {
@@ -4452,45 +4366,27 @@ class App extends React.Component<AppProps, AppState> {
     }
 
     this.cancelInProgressAnimation?.();
-    this.scrollToContentRequestId += 1;
-    this.debounceConstrainScrollState.cancel();
-
-    if (scrollConstraintsAnimationTimeout) {
-      clearTimeout(scrollConstraintsAnimationTimeout);
-      scrollConstraintsAnimationTimeout = null;
-    }
-
-    if (opts?.scrollLock != null && this.state.scrollConstraints) {
-      // Clear the previous lock before starting the next locked transition so
-      // stale constraint enforcement cannot snap us back mid-flight.
-      this.setState({ scrollConstraints: null });
-    }
 
     // convert provided target into ExcalidrawElement[] if necessary
     const targetElements = Array.isArray(target) ? target : [target];
 
-    if (!targetElements.length) {
-      return;
-    }
-
     let zoom = this.state.zoom;
     let scrollX = this.state.scrollX;
     let scrollY = this.state.scrollY;
-    const targetBounds = getCommonBounds(targetElements);
 
     if (opts?.fitToContent || opts?.fitToViewport) {
-      const resolvedViewport = resolveViewportForBounds({
+      const { appState } = zoomToFit({
-        bounds: targetBounds,
         canvasOffsets: opts.canvasOffsets,
+        targetElements,
         appState: this.state,
         fitToViewport: !!opts?.fitToViewport,
         viewportZoomFactor: opts?.viewportZoomFactor,
         minZoom: opts?.minZoom,
         maxZoom: opts?.maxZoom,
       });
-      zoom = resolvedViewport.zoom;
+      zoom = appState.zoom;
-      scrollX = resolvedViewport.scrollX;
+      scrollX = appState.scrollX;
-      scrollY = resolvedViewport.scrollY;
+      scrollY = appState.scrollY;
     } else {
       // compute only the viewport location, without any zoom adjustment
       const scroll = calculateScrollCenter(targetElements, this.state);
@@ -4498,72 +4394,51 @@ class App extends React.Component<AppProps, AppState> {
       scrollY = scroll.scrollY;
     }
 
-    const scrollConstraints = opts?.scrollLock
-      ? getScrollConstraintsForBounds({
-          bounds: targetBounds,
-          zoom,
-          viewportDimensions: {
-            width: this.state.width,
-            height: this.state.height,
-          },
-          scrollLock: opts.scrollLock,
-        })
-      : null;
-    const requestId = this.scrollToContentRequestId;
-
-    const installScrollConstraints = () => {
-      if (!scrollConstraints || requestId !== this.scrollToContentRequestId) {
-        return;
-      }
-
-      this.setState({
-        scrollConstraints,
-      });
-    };
-
     // when animating, we use RequestAnimationFrame to prevent the animation
     // from slowing down other processes
     if (opts?.animate) {
-      const fromValues = {
+      const origScrollX = this.state.scrollX;
-        scrollX: this.state.scrollX,
+      const origScrollY = this.state.scrollY;
-        scrollY: this.state.scrollY,
+      const origZoom = this.state.zoom.value;
-        zoom: this.state.zoom.value,
-      };
 
-      const toValues = { scrollX, scrollY, zoom: zoom.value };
+      const cancel = easeToValuesRAF({
-
+        fromValues: {
-      this.animateTranslateCanvas({
+          scrollX: origScrollX,
-        fromValues,
+          scrollY: origScrollY,
-        toValues,
+          zoom: origZoom,
-        duration: opts?.duration ?? 500,
+        },
+        toValues: { scrollX, scrollY, zoom: zoom.value },
+        interpolateValue: (from, to, progress, key) => {
+          // for zoom, use different easing
+          if (key === "zoom") {
+            return from * Math.pow(to / from, easeOut(progress));
+          }
+          // handle using default
+          return undefined;
+        },
+        onStep: ({ scrollX, scrollY, zoom }) => {
+          this.setState({
+            scrollX,
+            scrollY,
+            zoom: { value: zoom },
+          });
+        },
         onStart: () => {
           this.setState({ shouldCacheIgnoreZoom: true });
         },
         onEnd: () => {
-          if (requestId !== this.scrollToContentRequestId) {
-            return;
-          }
-
-          this.setState(
-            { shouldCacheIgnoreZoom: false },
-            installScrollConstraints,
-          );
-        },
-        onCancel: () => {
-          if (requestId !== this.scrollToContentRequestId) {
-            return;
-          }
-
           this.setState({ shouldCacheIgnoreZoom: false });
         },
+        onCancel: () => {
+          this.setState({ shouldCacheIgnoreZoom: false });
+        },
+        duration: opts?.duration ?? 500,
       });
-    } else if (scrollConstraints) {
+
-      this.setState({
+      this.cancelInProgressAnimation = () => {
-        scrollX,
+        cancel();
-        scrollY,
+        this.cancelInProgressAnimation = null;
-        zoom,
+      };
-        scrollConstraints,
-      });
     } else {
       this.setState({ scrollX, scrollY, zoom });
     }
@@ -4577,165 +4452,11 @@ class App extends React.Component<AppProps, AppState> {
 
   /** use when changing scrollX/scrollY/zoom based on user interaction */
   private translateCanvas: React.Component<any, AppState>["setState"] = (
-    stateUpdate,
+    state,
   ) => {
     this.cancelInProgressAnimation?.();
     this.maybeUnfollowRemoteUser();
-
+    this.setState(state);
-    if (scrollConstraintsAnimationTimeout) {
-      clearTimeout(scrollConstraintsAnimationTimeout);
-    }
-
-    const partialNewState =
-      typeof stateUpdate === "function"
-        ? (
-            stateUpdate as (
-              prevState: Readonly<AppState>,
-              props: Readonly<AppProps>,
-            ) => AppState
-          )(this.state, this.props)
-        : stateUpdate;
-
-    const newState: AppState = {
-      ...this.state,
-      ...partialNewState,
-      ...(this.state.scrollConstraints && {
-        // manually reset if setState in onCancel wasn't committed yet
-        shouldCacheIgnoreZoom: false,
-      }),
-    };
-
-    // RULE: cannot go below the minimum zoom level if zoom lock is enabled
-    const constrainedState =
-      newState.scrollConstraints && newState.scrollConstraints.lockZoom
-        ? constrainScrollState(newState, "elastic")
-        : newState;
-    if (constrainedState.zoom.value > newState.zoom.value) {
-      newState.zoom = constrainedState.zoom;
-      newState.scrollX = constrainedState.scrollX;
-      newState.scrollY = constrainedState.scrollY;
-
-      this.debounceConstrainScrollState(newState);
-      return;
-    }
-
-    this.setState(newState);
-    if (this.state.scrollConstraints) {
-      if (newState.zoom.value < this.state.zoom.value) {
-        // zoom-out: debounce to allow centering on user's cursor position before constraining
-        this.debounceConstrainScrollState(newState);
-      } else {
-        // zoom-in or pan: valid range only expands on zoom-in, constrain immediately
-        this.setState(constrainScrollState(newState));
-      }
-    }
-  };
-
-  private debounceConstrainScrollState = debounce((state: AppState) => {
-    const newState = constrainScrollState(state, "rigid");
-
-    const fromValues = {
-      scrollX: this.state.scrollX,
-      scrollY: this.state.scrollY,
-      zoom: this.state.zoom.value,
-    };
-    const toValues = {
-      scrollX: newState.scrollX,
-      scrollY: newState.scrollY,
-      zoom: newState.zoom.value,
-    };
-
-    if (areCanvasTranslatesClose(fromValues, toValues)) {
-      return;
-    }
-
-    this.cancelInProgressAnimation?.();
-    this.animateToConstrainedArea(fromValues, toValues);
-  }, 200);
-
-  private animateToConstrainedArea = (
-    fromValues: AnimateTranslateCanvasValues,
-    toValues: AnimateTranslateCanvasValues,
-  ) => {
-    const cleanUp = () => {
-      this.setState((state) => ({
-        shouldCacheIgnoreZoom: false,
-        scrollConstraints: {
-          ...state.scrollConstraints!,
-          animateOnNextUpdate: false,
-        },
-      }));
-    };
-
-    this.animateTranslateCanvas({
-      fromValues,
-      toValues,
-      duration: 200,
-      onStart: () => {
-        this.setState((state) => {
-          return {
-            shouldCacheIgnoreZoom: true,
-            scrollConstraints: {
-              ...state.scrollConstraints!,
-              animateOnNextUpdate: false,
-            },
-          };
-        });
-      },
-      onEnd: cleanUp,
-      onCancel: cleanUp,
-    });
-  };
-
-  private animateTranslateCanvas = ({
-    fromValues,
-    toValues,
-    duration,
-    onStart,
-    onEnd,
-    onCancel,
-  }: {
-    fromValues: AnimateTranslateCanvasValues;
-    toValues: AnimateTranslateCanvasValues;
-    duration: number;
-    onStart: () => void;
-    onEnd: () => void;
-    onCancel: () => void;
-  }) => {
-    const cancel = easeToValuesRAF({
-      fromValues,
-      toValues,
-      interpolateValue: (from, to, progress, key) => {
-        // for zoom, use different easing
-        if (key === "zoom") {
-          return from * Math.pow(to / from, easeOut(progress));
-        }
-        // handle using default
-        return undefined;
-      },
-      onStep: ({ scrollX, scrollY, zoom }) => {
-        this.setState({
-          scrollX,
-          scrollY,
-          zoom: { value: zoom },
-        });
-      },
-      onStart,
-      onEnd: () => {
-        this.cancelInProgressAnimation = null;
-        onEnd();
-      },
-      onCancel: () => {
-        this.cancelInProgressAnimation = null;
-        onCancel();
-      },
-      duration,
-    });
-
-    this.cancelInProgressAnimation = () => {
-      cancel();
-      this.cancelInProgressAnimation = null;
-    };
   };
 
   setToast = (toast: AppState["toast"]) => {
@@ -4884,6 +4605,11 @@ class App extends React.Component<AppProps, AppState> {
     );
   };
 
+  /** Creates a new transaction for batching mutations into a single undo entry. */
+  public createTransaction: TransactionManager["create"] = () => {
+    return this.transactionManager.create();
+  };
+
   public mutateElement = <TElement extends Mutable<ExcalidrawElement>>(
     element: TElement,
     updates: ElementUpdate<TElement>,
@@ -5916,22 +5642,16 @@ class App extends React.Component<AppProps, AppState> {
 
     const initialScale = gesture.initialScale;
     if (initialScale) {
-      this.setState((state) =>
+      this.setState((state) => ({
-        constrainScrollState(
+        ...getStateForZoom(
           {
-            ...state,
+            viewportX: this.lastViewportPosition.x,
-            ...getStateForZoom(
+            viewportY: this.lastViewportPosition.y,
-              {
+            nextZoom: getNormalizedZoom(initialScale * event.scale),
-                viewportX: this.lastViewportPosition.x,
-                viewportY: this.lastViewportPosition.y,
-                nextZoom: getNormalizedZoom(initialScale * event.scale),
-              },
-              state,
-            ),
           },
-          "loose",
+          state,
         ),
-      );
+      }));
     }
   });
 
@@ -12908,21 +12628,17 @@ class App extends React.Component<AppProps, AppState> {
           // reduced amplification for small deltas (small movements on a trackpad)
           Math.min(1, absDelta / 20);
 
-        this.translateCanvas((state) => {
+        this.translateCanvas((state) => ({
-          const nextZoom = getNormalizedZoom(newZoom);
+          ...getStateForZoom(
-          const anchor = getConstrainedZoomAnchor(
             {
               viewportX: this.lastViewportPosition.x,
               viewportY: this.lastViewportPosition.y,
-              nextZoom,
+              nextZoom: getNormalizedZoom(newZoom),
             },
             state,
-          );
+          ),
-          return {
+          shouldCacheIgnoreZoom: true,
-            ...getStateForZoom({ ...anchor, nextZoom }, state),
+        }));
-            shouldCacheIgnoreZoom: true,
-          };
-        });
         this.resetShouldCacheIgnoreZoomDebounced();
         return;
       }
@@ -13080,71 +12796,6 @@ class App extends React.Component<AppProps, AppState> {
     await setLanguage(currentLang);
     this.setAppState({});
   }
-
-  /**
-   * Sets the scroll constraints of the application state.
-   *
-   * @param scrollConstraints - The new scroll constraints.
-   */
-  public setScrollConstraints = (
-    scrollConstraints: ScrollConstraints | null,
-  ) => {
-    if (this.props.scrollConstraints !== undefined) {
-      console.warn(SET_SCROLL_CONSTRAINTS_CONTROLLED_WARNING);
-      return;
-    }
-
-    this.syncScrollConstraints(scrollConstraints);
-  };
-
-  private syncScrollConstraints = (
-    scrollConstraints: ScrollConstraints | null,
-  ) => {
-    this.debounceConstrainScrollState.cancel();
-
-    if (scrollConstraintsAnimationTimeout) {
-      clearTimeout(scrollConstraintsAnimationTimeout);
-      scrollConstraintsAnimationTimeout = null;
-    }
-
-    this.cancelInProgressAnimation?.();
-
-    if (scrollConstraints) {
-      this.setState(
-        {
-          scrollConstraints,
-          shouldCacheIgnoreZoom: false,
-        },
-        () => {
-          const newState = constrainScrollState(
-            {
-              ...this.state,
-              scrollConstraints,
-            },
-            "rigid",
-          );
-
-          this.animateToConstrainedArea(
-            {
-              scrollX: this.state.scrollX,
-              scrollY: this.state.scrollY,
-              zoom: this.state.zoom.value,
-            },
-            {
-              scrollX: newState.scrollX,
-              scrollY: newState.scrollY,
-              zoom: newState.zoom.value,
-            },
-          );
-        },
-      );
-    } else {
-      this.setState({
-        scrollConstraints: null,
-        shouldCacheIgnoreZoom: false,
-      });
-    }
-  };
 }
 
 // -----------------------------------------------------------------------------

packages/excalidraw/history.ts

@@ -87,10 +87,22 @@ export class HistoryChangedEvent {
   ) {}
 }
 
+export type HistoryBeforeRecordListener = (delta: StoreDelta) => void;
+export type HistoryPerformDirection = "undo" | "redo";
+export type HistoryEffectiveDeltaResolverContext = {
+  direction: HistoryPerformDirection;
+};
+export type HistoryEffectiveDeltaResolver = (
+  delta: HistoryDelta,
+  context: HistoryEffectiveDeltaResolverContext,
+) => HistoryDelta;
+
 export class History {
   public readonly onHistoryChangedEmitter = new Emitter<
     [HistoryChangedEvent]
   >();
+  private readonly onBeforeRecordEmitter = new Emitter<[StoreDelta]>();
+  private effectiveDeltaResolver: HistoryEffectiveDeltaResolver | null = null;
 
   public readonly undoStack: HistoryDelta[] = [];
   public readonly redoStack: HistoryDelta[] = [];
@@ -105,6 +117,20 @@ export class History {
 
   constructor(private readonly store: Store) {}
 
+  /**
+   * Registers a hook that runs before a durable delta is converted
+   * into a history entry.
+   */
+  public onBeforeRecord(callback: HistoryBeforeRecordListener) {
+    return this.onBeforeRecordEmitter.on(callback);
+  }
+
+  public setEffectiveDeltaResolver(
+    resolver: HistoryEffectiveDeltaResolver | null,
+  ) {
+    this.effectiveDeltaResolver = resolver;
+  }
+
   public clear() {
     this.undoStack.length = 0;
     this.redoStack.length = 0;
@@ -119,6 +145,8 @@ export class History {
       return;
     }
 
+    this.onBeforeRecordEmitter.trigger(delta);
+
     // construct history entry, so once it's emitted, it's not recorded again
     const historyDelta = HistoryDelta.inverse(delta);
 
@@ -131,15 +159,14 @@ export class History {
       this.redoStack.length = 0;
     }
 
-    this.onHistoryChangedEmitter.trigger(
+    this.emitHistoryChanged();
-      new HistoryChangedEvent(this.isUndoStackEmpty, this.isRedoStackEmpty),
-    );
   }
 
   public undo(elements: SceneElementsMap, appState: AppState) {
     return this.perform(
       elements,
       appState,
+      "undo",
       () => History.pop(this.undoStack),
       (entry: HistoryDelta) => History.push(this.redoStack, entry),
     );
@@ -149,6 +176,7 @@ export class History {
     return this.perform(
       elements,
       appState,
+      "redo",
       () => History.pop(this.redoStack),
       (entry: HistoryDelta) => History.push(this.undoStack, entry),
     );
@@ -157,6 +185,7 @@ export class History {
   private perform(
     elements: SceneElementsMap,
     appState: AppState,
+    direction: HistoryPerformDirection,
     pop: () => HistoryDelta | null,
     push: (entry: HistoryDelta) => void,
   ): [SceneElementsMap, AppState] | void {
@@ -177,9 +206,15 @@ export class History {
 
       // iterate through the history entries in case they result in no visible changes
       while (historyDelta) {
+        // Roundtrip invariant: whichever delta we execute must be the one that
+        // continues through applyLatestChanges -> inverse -> opposite stack.
+        let entryToPush = historyDelta;
         try {
+          const effectiveDelta = this.resolveEffectiveDelta(historyDelta, {
+            direction,
+          });
           [nextElements, nextAppState, containsVisibleChange] =
-            historyDelta.applyTo(nextElements, nextAppState, prevSnapshot);
+            effectiveDelta.applyTo(nextElements, nextAppState, prevSnapshot);
 
           const prevElements = prevSnapshot.elements;
           const nextSnapshot = prevSnapshot.maybeClone(
@@ -190,7 +225,7 @@ export class History {
 
           const change = StoreChange.create(prevSnapshot, nextSnapshot);
           const delta = HistoryDelta.applyLatestChanges(
-            historyDelta,
+            effectiveDelta,
             prevElements,
             nextElements,
           );
@@ -203,12 +238,12 @@ export class History {
               delta,
             });
 
-            historyDelta = delta;
+            entryToPush = delta;
           }
 
           prevSnapshot = nextSnapshot;
         } finally {
-          push(historyDelta);
+          push(entryToPush);
         }
 
         if (containsVisibleChange) {
@@ -222,12 +257,16 @@ export class History {
     } finally {
       // trigger the history change event before returning completely
       // also trigger it just once, no need doing so on each entry
-      this.onHistoryChangedEmitter.trigger(
+      this.emitHistoryChanged();
-        new HistoryChangedEvent(this.isUndoStackEmpty, this.isRedoStackEmpty),
-      );
     }
   }
 
+  private emitHistoryChanged() {
+    this.onHistoryChangedEmitter.trigger(
+      new HistoryChangedEvent(this.isUndoStackEmpty, this.isRedoStackEmpty),
+    );
+  }
+
   private static pop(stack: HistoryDelta[]): HistoryDelta | null {
     if (!stack.length) {
       return null;
@@ -246,4 +285,15 @@ export class History {
     const inversedEntry = HistoryDelta.inverse(entry);
     return stack.push(inversedEntry);
   }
+
+  private resolveEffectiveDelta(
+    delta: HistoryDelta,
+    context: HistoryEffectiveDeltaResolverContext,
+  ): HistoryDelta {
+    if (!this.effectiveDeltaResolver) {
+      return delta;
+    }
+
+    return this.effectiveDeltaResolver(delta, context);
+  }
 }

packages/excalidraw/index.tsx

@@ -98,7 +98,6 @@ const ExcalidrawBase = (props: ExcalidrawProps) => {
     aiEnabled,
     showDeprecatedFonts,
     renderScrollbars,
-    scrollConstraints,
   } = props;
 
   const canvasActions = props.UIOptions?.canvasActions;
@@ -209,7 +208,6 @@ const ExcalidrawBase = (props: ExcalidrawProps) => {
           aiEnabled={aiEnabled !== false}
           showDeprecatedFonts={showDeprecatedFonts}
           renderScrollbars={renderScrollbars}
-          scrollConstraints={scrollConstraints}
         >
           {children}
         </App>

packages/excalidraw/package.json

@@ -83,13 +83,13 @@
     "@codemirror/language": "^6.0.0",
     "@codemirror/state": "^6.0.0",
     "@codemirror/view": "^6.0.0",
-    "@lezer/highlight": "^1.0.0",
     "@excalidraw/common": "0.18.0",
     "@excalidraw/element": "0.18.0",
     "@excalidraw/laser-pointer": "1.3.1",
     "@excalidraw/math": "0.18.0",
     "@excalidraw/mermaid-to-excalidraw": "2.2.2",
     "@excalidraw/random-username": "1.1.0",
+    "@lezer/highlight": "^1.0.0",
     "browser-fs-access": "0.38.0",
     "canvas-roundrect-polyfill": "0.0.1",
     "clsx": "1.1.1",

packages/excalidraw/scene/scrollConstraints.ts

@@ -1,590 +0,0 @@
-import { MAX_ZOOM } from "@excalidraw/common";
-
-import { isShallowEqual } from "@excalidraw/common";
-
-import { clamp } from "@excalidraw/math";
-
-import { getNormalizedZoom } from "./normalize";
-
-import type {
-  AnimateTranslateCanvasValues,
-  AppState,
-  ScrollConstraints,
-  ScrollToContentLockOptions,
-} from "../types";
-
-// Constants for viewport zoom factor and overscroll allowance
-const MIN_VIEWPORT_ZOOM_FACTOR = 0.1;
-const MAX_VIEWPORT_ZOOM_FACTOR = MAX_ZOOM;
-const DEFAULT_VIEWPORT_ZOOM_FACTOR = 0.2;
-const DEFAULT_OVERSCROLL_ALLOWANCE = 0.2;
-
-// Memoization variable to cache constraints for performance optimization
-let memoizedValues: {
-  previousState: Pick<
-    AppState,
-    "zoom" | "width" | "height" | "scrollConstraints"
-  >;
-  constraints: ReturnType<typeof calculateConstraints>;
-  allowOverscroll: boolean;
-} | null = null;
-
-type CanvasTranslate = Pick<AppState, "scrollX" | "scrollY" | "zoom">;
-
-export const getScrollConstraintsForBounds = ({
-  bounds,
-  zoom,
-  viewportDimensions,
-  scrollLock,
-}: {
-  bounds: readonly [number, number, number, number];
-  zoom: AppState["zoom"];
-  viewportDimensions: Pick<AppState, "width" | "height">;
-  scrollLock?: boolean | ScrollToContentLockOptions;
-}): ScrollConstraints => {
-  const [x1, y1, x2, y2] = bounds;
-  const width = x2 - x1;
-  const height = y2 - y1;
-  const baseZoom = Math.min(
-    viewportDimensions.width / width,
-    viewportDimensions.height / height,
-  );
-  const lockOptions =
-    scrollLock && typeof scrollLock === "object" ? scrollLock : undefined;
-  const viewportZoomFactor =
-    lockOptions?.viewportZoomFactor ?? zoom.value / baseZoom;
-
-  return {
-    x: x1,
-    y: y1,
-    width,
-    height,
-    animateOnNextUpdate: false,
-    lockZoom: !!lockOptions?.lockZoom,
-    overscrollAllowance: lockOptions?.overscrollAllowance,
-    viewportZoomFactor,
-  };
-};
-
-/**
- * Calculates the zoom levels necessary to fit the constrained scrollable area within the viewport on the X and Y axes.
- *
- * The function considers the dimensions of the scrollable area, the dimensions of the viewport, the viewport zoom factor,
- * and whether the zoom should be locked. It then calculates the necessary zoom levels for the X and Y axes separately.
- * If the zoom should be locked, it calculates the maximum zoom level that fits the scrollable area within the viewport,
- * factoring in the viewport zoom factor. If the zoom should not be locked, the maximum zoom level is set to null.
- *
- * @param scrollConstraints - The constraints of the scrollable area including width, height, and position.
- * @param width - The width of the viewport.
- * @param height - The height of the viewport.
- * @returns An object containing the calculated zoom levels for the X and Y axes, and the initial zoom level.
- */
-const calculateZoomLevel = (
-  scrollConstraints: ScrollConstraints,
-  width: AppState["width"],
-  height: AppState["height"],
-) => {
-  const viewportZoomFactor = scrollConstraints.viewportZoomFactor
-    ? clamp(
-        scrollConstraints.viewportZoomFactor,
-        MIN_VIEWPORT_ZOOM_FACTOR,
-        MAX_VIEWPORT_ZOOM_FACTOR,
-      )
-    : DEFAULT_VIEWPORT_ZOOM_FACTOR;
-
-  const scrollableWidth = scrollConstraints.width;
-  const scrollableHeight = scrollConstraints.height;
-  const zoomLevelX = width / scrollableWidth;
-  const zoomLevelY = height / scrollableHeight;
-  const initialZoomLevel = getNormalizedZoom(
-    Math.min(zoomLevelX, zoomLevelY) * viewportZoomFactor,
-  );
-  return { zoomLevelX, zoomLevelY, initialZoomLevel };
-};
-
-/**
- * Calculates the effective zoom level based on the scroll constraints and current zoom.
- *
- * @param params - Object containing scrollConstraints, width, height, and zoom.
- * @returns An object with the effective zoom level, initial zoom level, and zoom levels for X and Y axes.
- */
-const calculateZoom = ({
-  scrollConstraints,
-  width,
-  height,
-  zoom,
-}: {
-  scrollConstraints: ScrollConstraints;
-  width: AppState["width"];
-  height: AppState["height"];
-  zoom: AppState["zoom"];
-}) => {
-  const { zoomLevelX, zoomLevelY, initialZoomLevel } = calculateZoomLevel(
-    scrollConstraints,
-    width,
-    height,
-  );
-  const effectiveZoom = scrollConstraints.lockZoom
-    ? Math.max(initialZoomLevel, zoom.value)
-    : zoom.value;
-  return {
-    effectiveZoom: getNormalizedZoom(effectiveZoom),
-    initialZoomLevel,
-    zoomLevelX,
-    zoomLevelY,
-  };
-};
-
-/**
- * Calculates the scroll bounds (min and max scroll values) based on the scroll constraints and zoom level.
- *
- * @param params - Object containing scrollConstraints, width, height, effectiveZoom, zoomLevelX, zoomLevelY, and allowOverscroll.
- * @returns An object with min and max scroll values for X and Y axes.
- */
-const calculateScrollBounds = ({
-  scrollConstraints,
-  width,
-  height,
-  effectiveZoom,
-  zoomLevelX,
-  zoomLevelY,
-  allowOverscroll,
-}: {
-  scrollConstraints: ScrollConstraints;
-  width: AppState["width"];
-  height: AppState["height"];
-  effectiveZoom: number;
-  zoomLevelX: number;
-  zoomLevelY: number;
-  allowOverscroll: boolean;
-}) => {
-  const overscrollAllowance =
-    scrollConstraints.overscrollAllowance ?? DEFAULT_OVERSCROLL_ALLOWANCE;
-  const validatedOverscroll = clamp(overscrollAllowance, 0, 1);
-
-  const calculateCenter = (zoom: number) => {
-    const centerX =
-      scrollConstraints.x + (scrollConstraints.width - width / zoom) / -2;
-    const centerY =
-      scrollConstraints.y + (scrollConstraints.height - height / zoom) / -2;
-    return { centerX, centerY };
-  };
-
-  const { centerX, centerY } = calculateCenter(effectiveZoom);
-
-  const overscrollValue = Math.min(
-    validatedOverscroll * scrollConstraints.width,
-    validatedOverscroll * scrollConstraints.height,
-  );
-
-  const fitsX = effectiveZoom <= zoomLevelX;
-  const fitsY = effectiveZoom <= zoomLevelY;
-
-  const getScrollRange = (
-    axis: "x" | "y",
-    fits: boolean,
-    constraint: ScrollConstraints,
-    viewportSize: number,
-    zoom: number,
-    overscroll: number,
-  ) => {
-    const { pos, size } =
-      axis === "x"
-        ? { pos: constraint.x, size: constraint.width }
-        : { pos: constraint.y, size: constraint.height };
-    const center = axis === "x" ? centerX : centerY;
-    if (allowOverscroll) {
-      return fits
-        ? { min: center - overscroll, max: center + overscroll }
-        : {
-            min: pos - size + viewportSize / zoom - overscroll,
-            max: pos + overscroll,
-          };
-    }
-    return fits
-      ? { min: center, max: center }
-      : { min: pos - size + viewportSize / zoom, max: pos };
-  };
-
-  const xRange = getScrollRange(
-    "x",
-    fitsX,
-    scrollConstraints,
-    width,
-    effectiveZoom,
-    overscrollValue,
-  );
-  const yRange = getScrollRange(
-    "y",
-    fitsY,
-    scrollConstraints,
-    height,
-    effectiveZoom,
-    overscrollValue,
-  );
-
-  return {
-    minScrollX: xRange.min,
-    maxScrollX: xRange.max,
-    minScrollY: yRange.min,
-    maxScrollY: yRange.max,
-  };
-};
-
-/**
- * Calculates the scroll constraints including min and max scroll values and the effective zoom level.
- *
- * @param params - Object containing scrollConstraints, width, height, zoom, and allowOverscroll.
- * @returns An object with min and max scroll values, effective zoom, and initial zoom level.
- */
-const calculateConstraints = ({
-  scrollConstraints,
-  width,
-  height,
-  zoom,
-  allowOverscroll,
-}: {
-  scrollConstraints: ScrollConstraints;
-  width: AppState["width"];
-  height: AppState["height"];
-  zoom: AppState["zoom"];
-  allowOverscroll: boolean;
-}) => {
-  const { effectiveZoom, initialZoomLevel, zoomLevelX, zoomLevelY } =
-    calculateZoom({ scrollConstraints, width, height, zoom });
-  const scrollBounds = calculateScrollBounds({
-    scrollConstraints,
-    width,
-    height,
-    effectiveZoom,
-    zoomLevelX,
-    zoomLevelY,
-    allowOverscroll,
-  });
-
-  return {
-    ...scrollBounds,
-    effectiveZoom: { value: effectiveZoom },
-    initialZoomLevel,
-  };
-};
-
-/**
- * Constrains the scroll values within the provided min and max bounds.
- *
- * @param params - Object containing scrollX, scrollY, minScrollX, maxScrollX, minScrollY, maxScrollY, and constrainedZoom.
- * @returns An object with constrained scrollX, scrollY, and zoom.
- */
-const constrainScrollValues = ({
-  scrollX,
-  scrollY,
-  minScrollX,
-  maxScrollX,
-  minScrollY,
-  maxScrollY,
-  constrainedZoom,
-}: {
-  scrollX: number;
-  scrollY: number;
-  minScrollX: number;
-  maxScrollX: number;
-  minScrollY: number;
-  maxScrollY: number;
-  constrainedZoom: AppState["zoom"];
-}): CanvasTranslate => {
-  const constrainedScrollX = clamp(scrollX, minScrollX, maxScrollX);
-  const constrainedScrollY = clamp(scrollY, minScrollY, maxScrollY);
-  return {
-    scrollX: constrainedScrollX,
-    scrollY: constrainedScrollY,
-    zoom: constrainedZoom,
-  };
-};
-
-/**
- * Inverts the scroll constraints to align with the state scrollX and scrollY values, which are inverted.
- * This is a temporary fix and should be removed once issue #5965 is resolved.
- *
- * @param originalScrollConstraints - The original scroll constraints.
- * @returns The aligned scroll constraints with inverted x and y coordinates.
- */
-const alignScrollConstraints = (
-  originalScrollConstraints: ScrollConstraints,
-): ScrollConstraints => {
-  return {
-    ...originalScrollConstraints,
-    x: originalScrollConstraints.x * -1,
-    y: originalScrollConstraints.y * -1,
-  };
-};
-
-/**
- * Determines whether the current viewport is outside the constrained area.
- *
- * @param state - The application state.
- * @returns True if the viewport is outside the constrained area, false otherwise.
- */
-const isViewportOutsideOfConstrainedArea = (state: AppState): boolean => {
-  if (!state.scrollConstraints) {
-    return false;
-  }
-
-  const {
-    scrollX,
-    scrollY,
-    width,
-    height,
-    scrollConstraints: inverseScrollConstraints,
-    zoom,
-  } = state;
-
-  const scrollConstraints = alignScrollConstraints(inverseScrollConstraints);
-
-  const adjustedWidth = width / zoom.value;
-  const adjustedHeight = height / zoom.value;
-
-  return (
-    scrollX > scrollConstraints.x ||
-    scrollX - adjustedWidth < scrollConstraints.x - scrollConstraints.width ||
-    scrollY > scrollConstraints.y ||
-    scrollY - adjustedHeight < scrollConstraints.y - scrollConstraints.height
-  );
-};
-
-/**
- * Calculates the scroll center coordinates and the optimal zoom level to fit the constrained scrollable area within the viewport.
- *
- * @param state - The application state.
- * @param scroll - Object containing current scrollX and scrollY.
- * @returns An object with the calculated scrollX, scrollY, and zoom.
- */
-export const calculateConstrainedScrollCenter = (
-  state: AppState,
-  { scrollX, scrollY }: Pick<AppState, "scrollX" | "scrollY">,
-): CanvasTranslate => {
-  const { width, height, scrollConstraints } = state;
-  if (!scrollConstraints) {
-    return { scrollX, scrollY, zoom: state.zoom };
-  }
-
-  const adjustedConstraints = alignScrollConstraints(scrollConstraints);
-  const zoomLevels = calculateZoomLevel(adjustedConstraints, width, height);
-  const initialZoom = { value: zoomLevels.initialZoomLevel };
-  const constraints = calculateConstraints({
-    scrollConstraints: adjustedConstraints,
-    width,
-    height,
-    zoom: initialZoom,
-    allowOverscroll: false,
-  });
-
-  return {
-    scrollX: constraints.minScrollX,
-    scrollY: constraints.minScrollY,
-    zoom: constraints.effectiveZoom,
-  };
-};
-
-/**
- * Encodes scroll constraints into a compact string.
- *
- * @param constraints - The scroll constraints to encode.
- * @returns A compact encoded string representing the scroll constraints.
- */
-export const encodeConstraints = (constraints: ScrollConstraints): string => {
-  const payload = {
-    x: constraints.x,
-    y: constraints.y,
-    w: constraints.width,
-    h: constraints.height,
-    a: !!constraints.animateOnNextUpdate,
-    l: !!constraints.lockZoom,
-    v: constraints.viewportZoomFactor ?? 1,
-    oa: constraints.overscrollAllowance ?? DEFAULT_OVERSCROLL_ALLOWANCE,
-  };
-  const serialized = JSON.stringify(payload);
-  return encodeURIComponent(window.btoa(serialized).replace(/=+/, ""));
-};
-
-/**
- * Decodes a compact string back into scroll constraints.
- *
- * @param encoded - The encoded string representing the scroll constraints.
- * @returns The decoded scroll constraints object.
- */
-export const decodeConstraints = (encoded: string): ScrollConstraints => {
-  try {
-    const decodedStr = window.atob(decodeURIComponent(encoded));
-    const parsed = JSON.parse(decodedStr) as {
-      x: number;
-      y: number;
-      w: number;
-      h: number;
-      a: boolean;
-      l: boolean;
-      v: number;
-      oa: number;
-    };
-    return {
-      x: parsed.x || 0,
-      y: parsed.y || 0,
-      width: parsed.w || 0,
-      height: parsed.h || 0,
-      lockZoom: parsed.l || false,
-      viewportZoomFactor: parsed.v || 1,
-      animateOnNextUpdate: parsed.a || false,
-      overscrollAllowance: parsed.oa || DEFAULT_OVERSCROLL_ALLOWANCE,
-    };
-  } catch (error) {
-    return {
-      x: 0,
-      y: 0,
-      width: 0,
-      height: 0,
-      animateOnNextUpdate: false,
-      lockZoom: false,
-      viewportZoomFactor: 1,
-      overscrollAllowance: DEFAULT_OVERSCROLL_ALLOWANCE,
-    };
-  }
-};
-
-type Options = { allowOverscroll: boolean; disableAnimation: boolean };
-const DEFAULT_OPTION: Options = {
-  allowOverscroll: true,
-  disableAnimation: false,
-};
-
-/**
- * Constrains the AppState scroll values within the defined scroll constraints.
- *
- * constraintMode can be "elastic", "rigid", or "loose":
- * - "elastic": snaps to constraints but allows overscroll
- * - "rigid": snaps to constraints without overscroll
- * - "loose": allows overscroll and disables animation/snapping to constraints
- *
- * @param state - The original AppState.
- * @param options - Options for allowing overscroll and disabling animation.
- * @returns A new AppState object with constrained scroll values.
- */
-export const constrainScrollState = (
-  state: AppState,
-  constraintMode: "elastic" | "rigid" | "loose" = "elastic",
-): AppState => {
-  if (!state.scrollConstraints) {
-    return state;
-  }
-  const {
-    scrollX,
-    scrollY,
-    width,
-    height,
-    scrollConstraints: inverseScrollConstraints,
-    zoom,
-  } = state;
-
-  let allowOverscroll: boolean;
-  let disableAnimation: boolean;
-
-  switch (constraintMode) {
-    case "elastic":
-      ({ allowOverscroll, disableAnimation } = DEFAULT_OPTION);
-      break;
-    case "rigid":
-      allowOverscroll = false;
-      disableAnimation = false;
-      break;
-    case "loose":
-      allowOverscroll = true;
-      disableAnimation = true;
-      break;
-    default:
-      ({ allowOverscroll, disableAnimation } = DEFAULT_OPTION);
-      break;
-  }
-
-  const scrollConstraints = alignScrollConstraints(inverseScrollConstraints);
-
-  const canUseMemoizedValues =
-    memoizedValues &&
-    memoizedValues.previousState.scrollConstraints &&
-    memoizedValues.allowOverscroll === allowOverscroll &&
-    isShallowEqual(
-      state.scrollConstraints,
-      memoizedValues.previousState.scrollConstraints,
-    ) &&
-    isShallowEqual(
-      { zoom: zoom.value, width, height },
-      {
-        zoom: memoizedValues.previousState.zoom.value,
-        width: memoizedValues.previousState.width,
-        height: memoizedValues.previousState.height,
-      },
-    );
-
-  const constraints = canUseMemoizedValues
-    ? memoizedValues!.constraints
-    : calculateConstraints({
-        scrollConstraints,
-        width,
-        height,
-        zoom,
-        allowOverscroll,
-      });
-
-  if (!canUseMemoizedValues) {
-    memoizedValues = {
-      previousState: {
-        zoom: state.zoom,
-        width: state.width,
-        height: state.height,
-        scrollConstraints: state.scrollConstraints,
-      },
-      constraints,
-      allowOverscroll,
-    };
-  }
-
-  const constrainedValues =
-    zoom.value >= constraints.effectiveZoom.value
-      ? constrainScrollValues({
-          scrollX,
-          scrollY,
-          minScrollX: constraints.minScrollX,
-          maxScrollX: constraints.maxScrollX,
-          minScrollY: constraints.minScrollY,
-          maxScrollY: constraints.maxScrollY,
-          constrainedZoom: constraints.effectiveZoom,
-        })
-      : calculateConstrainedScrollCenter(state, { scrollX, scrollY });
-
-  return {
-    ...state,
-    scrollConstraints: {
-      ...state.scrollConstraints,
-      animateOnNextUpdate: disableAnimation
-        ? false
-        : isViewportOutsideOfConstrainedArea(state),
-    },
-    ...constrainedValues,
-  };
-};
-
-/**
- * Checks if two canvas translate values are close within a threshold.
- *
- * @param from - First set of canvas translate values.
- * @param to - Second set of canvas translate values.
- * @returns True if the values are close, false otherwise.
- */
-export const areCanvasTranslatesClose = (
-  from: AnimateTranslateCanvasValues,
-  to: AnimateTranslateCanvasValues,
-): boolean => {
-  const threshold = 0.1;
-  return (
-    Math.abs(from.scrollX - to.scrollX) < threshold &&
-    Math.abs(from.scrollY - to.scrollY) < threshold &&
-    Math.abs(from.zoom - to.zoom) < threshold
-  );
-};

packages/excalidraw/scene/zoom.ts

@@ -1,67 +1,5 @@
-import { constrainScrollState } from "./scrollConstraints";
-
 import type { AppState, NormalizedZoomValue } from "../types";
 
-/**
- * When zooming out with scroll constraints active, the cursor-anchored zoom may
- * produce a scroll position outside the valid bounds, causing a snap-back.
- *
- * This function adjusts the effective zoom anchor point so the resulting scroll
- * stays within bounds — silently, without any snap. When no adjustment is needed
- * (zoom-in, no constraints, or already within bounds) it returns the original
- * viewport position unchanged.
- */
-export const getConstrainedZoomAnchor = (
-  {
-    viewportX,
-    viewportY,
-    nextZoom,
-  }: { viewportX: number; viewportY: number; nextZoom: NormalizedZoomValue },
-  state: AppState,
-): { viewportX: number; viewportY: number } => {
-  if (!state.scrollConstraints || nextZoom >= state.zoom.value) {
-    return { viewportX, viewportY };
-  }
-
-  const appLayerX = viewportX - state.offsetLeft;
-  const appLayerY = viewportY - state.offsetTop;
-  const factor = 1 / nextZoom - 1 / state.zoom.value;
-
-  const newScrollX = state.scrollX + appLayerX * factor;
-  const newScrollY = state.scrollY + appLayerY * factor;
-
-  const constrained = constrainScrollState(
-    {
-      ...state,
-      scrollX: newScrollX,
-      scrollY: newScrollY,
-      zoom: { value: nextZoom },
-    },
-    "rigid",
-  );
-
-  if (
-    constrained.scrollX === newScrollX &&
-    constrained.scrollY === newScrollY
-  ) {
-    return { viewportX, viewportY };
-  }
-
-  const adjustedAppLayerX =
-    constrained.scrollX !== newScrollX
-      ? (constrained.scrollX - state.scrollX) / factor
-      : appLayerX;
-  const adjustedAppLayerY =
-    constrained.scrollY !== newScrollY
-      ? (constrained.scrollY - state.scrollY) / factor
-      : appLayerY;
-
-  return {
-    viewportX: adjustedAppLayerX + state.offsetLeft,
-    viewportY: adjustedAppLayerY + state.offsetTop,
-  };
-};
-
 export const getStateForZoom = (
   {
     viewportX,

packages/excalidraw/tests/__snapshots__/contextmenu.test.tsx.snap

@@ -961,7 +961,6 @@ exports[`contextMenu element > right-clicking on a group should select whole gro
   },
   "previousSelectedElementIds": {},
   "resizingElement": null,
-  "scrollConstraints": null,
   "scrollX": 0,
   "scrollY": 0,
   "scrolledOutside": false,
@@ -1159,7 +1158,6 @@ exports[`contextMenu element > selecting 'Add to library' in context menu adds e
   },
   "previousSelectedElementIds": {},
   "resizingElement": null,
-  "scrollConstraints": null,
   "scrollX": 0,
   "scrollY": 0,
   "scrolledOutside": true,
@@ -1375,7 +1373,6 @@ exports[`contextMenu element > selecting 'Bring forward' in context menu brings
   },
   "previousSelectedElementIds": {},
   "resizingElement": null,
-  "scrollConstraints": null,
   "scrollX": 0,
   "scrollY": 0,
   "scrolledOutside": false,
@@ -1708,7 +1705,6 @@ exports[`contextMenu element > selecting 'Bring to front' in context menu brings
   },
   "previousSelectedElementIds": {},
   "resizingElement": null,
-  "scrollConstraints": null,
   "scrollX": 0,
   "scrollY": 0,
   "scrolledOutside": false,
@@ -2041,7 +2037,6 @@ exports[`contextMenu element > selecting 'Copy styles' in context menu copies st
   },
   "previousSelectedElementIds": {},
   "resizingElement": null,
-  "scrollConstraints": null,
   "scrollX": 0,
   "scrollY": 0,
   "scrolledOutside": true,
@@ -2257,7 +2252,6 @@ exports[`contextMenu element > selecting 'Delete' in context menu deletes elemen
   },
   "previousSelectedElementIds": {},
   "resizingElement": null,
-  "scrollConstraints": null,
   "scrollX": 0,
   "scrollY": 0,
   "scrolledOutside": false,
@@ -2500,7 +2494,6 @@ exports[`contextMenu element > selecting 'Duplicate' in context menu duplicates
   },
   "previousSelectedElementIds": {},
   "resizingElement": null,
-  "scrollConstraints": null,
   "scrollX": 0,
   "scrollY": 0,
   "scrolledOutside": false,
@@ -2802,7 +2795,6 @@ exports[`contextMenu element > selecting 'Group selection' in context menu group
     "id3": true,
   },
   "resizingElement": null,
-  "scrollConstraints": null,
   "scrollX": 0,
   "scrollY": 0,
   "scrolledOutside": false,
@@ -3174,7 +3166,6 @@ exports[`contextMenu element > selecting 'Paste styles' in context menu pastes s
   },
   "previousSelectedElementIds": {},
   "resizingElement": null,
-  "scrollConstraints": null,
   "scrollX": 0,
   "scrollY": 0,
   "scrolledOutside": false,
@@ -3669,7 +3660,6 @@ exports[`contextMenu element > selecting 'Send backward' in context menu sends e
   },
   "previousSelectedElementIds": {},
   "resizingElement": null,
-  "scrollConstraints": null,
   "scrollX": 0,
   "scrollY": 0,
   "scrolledOutside": false,
@@ -3994,7 +3984,6 @@ exports[`contextMenu element > selecting 'Send to back' in context menu sends el
   },
   "previousSelectedElementIds": {},
   "resizingElement": null,
-  "scrollConstraints": null,
   "scrollX": 0,
   "scrollY": 0,
   "scrolledOutside": false,
@@ -4321,7 +4310,6 @@ exports[`contextMenu element > selecting 'Ungroup selection' in context menu ung
     "id3": true,
   },
   "resizingElement": null,
-  "scrollConstraints": null,
   "scrollX": 0,
   "scrollY": 0,
   "scrolledOutside": false,
@@ -5608,7 +5596,6 @@ exports[`contextMenu element > shows 'Group selection' in context menu for multi
     "id0": true,
   },
   "resizingElement": null,
-  "scrollConstraints": null,
   "scrollX": 0,
   "scrollY": 0,
   "scrolledOutside": false,
@@ -6827,7 +6814,6 @@ exports[`contextMenu element > shows 'Ungroup selection' in context menu for gro
     "id0": true,
   },
   "resizingElement": null,
-  "scrollConstraints": null,
   "scrollX": 0,
   "scrollY": 0,
   "scrolledOutside": false,
@@ -7787,7 +7773,6 @@ exports[`contextMenu element > shows context menu for canvas > [end of test] app
   },
   "previousSelectedElementIds": {},
   "resizingElement": null,
-  "scrollConstraints": null,
   "scrollX": 0,
   "scrollY": 0,
   "scrolledOutside": false,
@@ -8786,7 +8771,6 @@ exports[`contextMenu element > shows context menu for element > [end of test] ap
   },
   "previousSelectedElementIds": {},
   "resizingElement": null,
-  "scrollConstraints": null,
   "scrollX": 0,
   "scrollY": 0,
   "scrolledOutside": true,
@@ -9782,7 +9766,6 @@ exports[`contextMenu element > shows context menu for element > [end of test] ap
   },
   "previousSelectedElementIds": {},
   "resizingElement": null,
-  "scrollConstraints": null,
   "scrollX": 0,
   "scrollY": 0,
   "scrolledOutside": false,

packages/excalidraw/tests/__snapshots__/history.test.tsx.snap

@@ -85,7 +85,6 @@ exports[`history > multiplayer undo/redo > conflicts in arrows and their bindabl
     "id4": true,
   },
   "resizingElement": null,
-  "scrollConstraints": null,
   "scrollX": 0,
   "scrollY": 0,
   "searchMatches": null,
@@ -720,7 +719,6 @@ exports[`history > multiplayer undo/redo > conflicts in arrows and their bindabl
     "id4": true,
   },
   "resizingElement": null,
-  "scrollConstraints": null,
   "scrollX": 0,
   "scrollY": 0,
   "searchMatches": null,
@@ -1284,7 +1282,6 @@ exports[`history > multiplayer undo/redo > conflicts in arrows and their bindabl
   },
   "previousSelectedElementIds": {},
   "resizingElement": null,
-  "scrollConstraints": null,
   "scrollX": 0,
   "scrollY": 0,
   "searchMatches": null,
@@ -1646,7 +1643,6 @@ exports[`history > multiplayer undo/redo > conflicts in arrows and their bindabl
   },
   "previousSelectedElementIds": {},
   "resizingElement": null,
-  "scrollConstraints": null,
   "scrollX": 0,
   "scrollY": 0,
   "searchMatches": null,
@@ -2010,7 +2006,6 @@ exports[`history > multiplayer undo/redo > conflicts in arrows and their bindabl
   },
   "previousSelectedElementIds": {},
   "resizingElement": null,
-  "scrollConstraints": null,
   "scrollX": 0,
   "scrollY": 0,
   "searchMatches": null,
@@ -2272,7 +2267,6 @@ exports[`history > multiplayer undo/redo > conflicts in arrows and their bindabl
   },
   "previousSelectedElementIds": {},
   "resizingElement": null,
-  "scrollConstraints": null,
   "scrollX": 0,
   "scrollY": 0,
   "searchMatches": null,
@@ -2730,7 +2724,6 @@ exports[`history > multiplayer undo/redo > conflicts in bound text elements and
   },
   "previousSelectedElementIds": {},
   "resizingElement": null,
-  "scrollConstraints": null,
   "scrollX": 0,
   "scrollY": 0,
   "searchMatches": null,
@@ -3035,7 +3028,6 @@ exports[`history > multiplayer undo/redo > conflicts in bound text elements and
   },
   "previousSelectedElementIds": {},
   "resizingElement": null,
-  "scrollConstraints": null,
   "scrollX": 0,
   "scrollY": 0,
   "searchMatches": null,
@@ -3356,7 +3348,6 @@ exports[`history > multiplayer undo/redo > conflicts in bound text elements and
   },
   "previousSelectedElementIds": {},
   "resizingElement": null,
-  "scrollConstraints": null,
   "scrollX": 0,
   "scrollY": 0,
   "searchMatches": null,
@@ -3652,7 +3643,6 @@ exports[`history > multiplayer undo/redo > conflicts in bound text elements and
   },
   "previousSelectedElementIds": {},
   "resizingElement": null,
-  "scrollConstraints": null,
   "scrollX": 0,
   "scrollY": 0,
   "searchMatches": null,
@@ -3940,7 +3930,6 @@ exports[`history > multiplayer undo/redo > conflicts in bound text elements and
   },
   "previousSelectedElementIds": {},
   "resizingElement": null,
-  "scrollConstraints": null,
   "scrollX": 0,
   "scrollY": 0,
   "searchMatches": null,
@@ -4177,7 +4166,6 @@ exports[`history > multiplayer undo/redo > conflicts in bound text elements and
   },
   "previousSelectedElementIds": {},
   "resizingElement": null,
-  "scrollConstraints": null,
   "scrollX": 0,
   "scrollY": 0,
   "searchMatches": null,
@@ -4436,7 +4424,6 @@ exports[`history > multiplayer undo/redo > conflicts in bound text elements and
   },
   "previousSelectedElementIds": {},
   "resizingElement": null,
-  "scrollConstraints": null,
   "scrollX": 0,
   "scrollY": 0,
   "searchMatches": null,
@@ -4709,7 +4696,6 @@ exports[`history > multiplayer undo/redo > conflicts in bound text elements and
   },
   "previousSelectedElementIds": {},
   "resizingElement": null,
-  "scrollConstraints": null,
   "scrollX": 0,
   "scrollY": 0,
   "searchMatches": null,
@@ -4940,7 +4926,6 @@ exports[`history > multiplayer undo/redo > conflicts in bound text elements and
   },
   "previousSelectedElementIds": {},
   "resizingElement": null,
-  "scrollConstraints": null,
   "scrollX": 0,
   "scrollY": 0,
   "searchMatches": null,
@@ -5171,7 +5156,6 @@ exports[`history > multiplayer undo/redo > conflicts in bound text elements and
   },
   "previousSelectedElementIds": {},
   "resizingElement": null,
-  "scrollConstraints": null,
   "scrollX": 0,
   "scrollY": 0,
   "searchMatches": null,
@@ -5420,7 +5404,6 @@ exports[`history > multiplayer undo/redo > conflicts in bound text elements and
   },
   "previousSelectedElementIds": {},
   "resizingElement": null,
-  "scrollConstraints": null,
   "scrollX": 0,
   "scrollY": 0,
   "searchMatches": null,
@@ -5678,7 +5661,6 @@ exports[`history > multiplayer undo/redo > conflicts in frames and their childre
   },
   "previousSelectedElementIds": {},
   "resizingElement": null,
-  "scrollConstraints": null,
   "scrollX": 0,
   "scrollY": 0,
   "searchMatches": null,
@@ -5937,7 +5919,6 @@ exports[`history > multiplayer undo/redo > should iterate through the history wh
     "id1": true,
   },
   "resizingElement": null,
-  "scrollConstraints": null,
   "scrollX": 0,
   "scrollY": 0,
   "searchMatches": null,
@@ -6268,7 +6249,6 @@ exports[`history > multiplayer undo/redo > should iterate through the history wh
     "id8": true,
   },
   "resizingElement": null,
-  "scrollConstraints": null,
   "scrollX": 0,
   "scrollY": 0,
   "searchMatches": null,
@@ -6697,7 +6677,6 @@ exports[`history > multiplayer undo/redo > should iterate through the history wh
     "id1": true,
   },
   "resizingElement": null,
-  "scrollConstraints": null,
   "scrollX": 0,
   "scrollY": 0,
   "searchMatches": null,
@@ -7074,7 +7053,6 @@ exports[`history > multiplayer undo/redo > should iterate through the history wh
   },
   "previousSelectedElementIds": {},
   "resizingElement": null,
-  "scrollConstraints": null,
   "scrollX": 0,
   "scrollY": 0,
   "searchMatches": null,
@@ -7385,7 +7363,6 @@ exports[`history > multiplayer undo/redo > should iterate through the history wh
   },
   "previousSelectedElementIds": {},
   "resizingElement": null,
-  "scrollConstraints": null,
   "scrollX": 0,
   "scrollY": 0,
   "searchMatches": null,
@@ -7679,7 +7656,6 @@ exports[`history > multiplayer undo/redo > should iterate through the history wh
   },
   "previousSelectedElementIds": {},
   "resizingElement": null,
-  "scrollConstraints": null,
   "scrollX": 0,
   "scrollY": 0,
   "searchMatches": null,
@@ -7911,7 +7887,6 @@ exports[`history > multiplayer undo/redo > should iterate through the history wh
   },
   "previousSelectedElementIds": {},
   "resizingElement": null,
-  "scrollConstraints": null,
   "scrollX": 0,
   "scrollY": 0,
   "searchMatches": null,
@@ -8265,7 +8240,6 @@ exports[`history > multiplayer undo/redo > should iterate through the history wh
   },
   "previousSelectedElementIds": {},
   "resizingElement": null,
-  "scrollConstraints": null,
   "scrollX": 0,
   "scrollY": 0,
   "searchMatches": null,
@@ -8622,7 +8596,6 @@ exports[`history > multiplayer undo/redo > should not let remote changes to inte
     "id3": true,
   },
   "resizingElement": null,
-  "scrollConstraints": null,
   "scrollX": 0,
   "scrollY": 0,
   "searchMatches": null,
@@ -9027,7 +9000,6 @@ exports[`history > multiplayer undo/redo > should not let remote changes to inte
   },
   "previousSelectedElementIds": {},
   "resizingElement": null,
-  "scrollConstraints": null,
   "scrollX": 0,
   "scrollY": 0,
   "searchMatches": null,
@@ -9308,7 +9280,6 @@ exports[`history > multiplayer undo/redo > should not let remote changes to inte
   },
   "previousSelectedElementIds": {},
   "resizingElement": null,
-  "scrollConstraints": null,
   "scrollX": 0,
   "scrollY": 0,
   "searchMatches": null,
@@ -9574,7 +9545,6 @@ exports[`history > multiplayer undo/redo > should not override remote changes on
   },
   "previousSelectedElementIds": {},
   "resizingElement": null,
-  "scrollConstraints": null,
   "scrollX": 0,
   "scrollY": 0,
   "searchMatches": null,
@@ -9841,7 +9811,6 @@ exports[`history > multiplayer undo/redo > should not override remote changes on
   },
   "previousSelectedElementIds": {},
   "resizingElement": null,
-  "scrollConstraints": null,
   "scrollX": 0,
   "scrollY": 0,
   "searchMatches": null,
@@ -10078,7 +10047,6 @@ exports[`history > multiplayer undo/redo > should override remotely added groups
   },
   "previousSelectedElementIds": {},
   "resizingElement": null,
-  "scrollConstraints": null,
   "scrollX": 0,
   "scrollY": 0,
   "searchMatches": null,
@@ -10374,7 +10342,6 @@ exports[`history > multiplayer undo/redo > should override remotely added points
   },
   "previousSelectedElementIds": {},
   "resizingElement": null,
-  "scrollConstraints": null,
   "scrollX": 0,
   "scrollY": 0,
   "searchMatches": null,
@@ -10693,7 +10660,6 @@ exports[`history > multiplayer undo/redo > should redistribute deltas when eleme
   },
   "previousSelectedElementIds": {},
   "resizingElement": null,
-  "scrollConstraints": null,
   "scrollX": 0,
   "scrollY": 0,
   "searchMatches": null,
@@ -10934,7 +10900,6 @@ exports[`history > multiplayer undo/redo > should redraw arrows on undo > [end o
   },
   "previousSelectedElementIds": {},
   "resizingElement": null,
-  "scrollConstraints": null,
   "scrollX": 0,
   "scrollY": 0,
   "searchMatches": null,
@@ -11858,7 +11823,6 @@ exports[`history > multiplayer undo/redo > should update history entries after r
   },
   "previousSelectedElementIds": {},
   "resizingElement": null,
-  "scrollConstraints": null,
   "scrollX": 0,
   "scrollY": 0,
   "searchMatches": null,
@@ -12120,7 +12084,6 @@ exports[`history > singleplayer undo/redo > remounting undo/redo buttons should
   },
   "previousSelectedElementIds": {},
   "resizingElement": null,
-  "scrollConstraints": null,
   "scrollX": 0,
   "scrollY": 0,
   "searchMatches": null,
@@ -12357,7 +12320,6 @@ exports[`history > singleplayer undo/redo > should clear the redo stack on eleme
   },
   "previousSelectedElementIds": {},
   "resizingElement": null,
-  "scrollConstraints": null,
   "scrollX": 0,
   "scrollY": 0,
   "searchMatches": null,
@@ -12596,7 +12558,6 @@ exports[`history > singleplayer undo/redo > should create entry when selecting f
   },
   "previousSelectedElementIds": {},
   "resizingElement": null,
-  "scrollConstraints": null,
   "scrollX": 0,
   "scrollY": 0,
   "searchMatches": null,
@@ -12992,7 +12953,6 @@ exports[`history > singleplayer undo/redo > should create new history entry on e
   },
   "previousSelectedElementIds": {},
   "resizingElement": null,
-  "scrollConstraints": null,
   "scrollX": 0,
   "scrollY": 0,
   "searchMatches": null,
@@ -13201,7 +13161,6 @@ exports[`history > singleplayer undo/redo > should create new history entry on e
   },
   "previousSelectedElementIds": {},
   "resizingElement": null,
-  "scrollConstraints": null,
   "scrollX": 0,
   "scrollY": 0,
   "searchMatches": null,
@@ -13413,7 +13372,6 @@ exports[`history > singleplayer undo/redo > should create new history entry on i
   },
   "previousSelectedElementIds": {},
   "resizingElement": null,
-  "scrollConstraints": null,
   "scrollX": 0,
   "scrollY": 0,
   "searchMatches": null,
@@ -13713,7 +13671,6 @@ exports[`history > singleplayer undo/redo > should create new history entry on i
   },
   "previousSelectedElementIds": {},
   "resizingElement": null,
-  "scrollConstraints": null,
   "scrollX": 0,
   "scrollY": 0,
   "searchMatches": null,
@@ -14016,7 +13973,6 @@ exports[`history > singleplayer undo/redo > should create new history entry on s
   },
   "previousSelectedElementIds": {},
   "resizingElement": null,
-  "scrollConstraints": null,
   "scrollX": -50,
   "scrollY": -50,
   "searchMatches": null,
@@ -14260,7 +14216,6 @@ exports[`history > singleplayer undo/redo > should disable undo/redo buttons whe
   },
   "previousSelectedElementIds": {},
   "resizingElement": null,
-  "scrollConstraints": null,
   "scrollX": 0,
   "scrollY": 0,
   "searchMatches": null,
@@ -14499,7 +14454,6 @@ exports[`history > singleplayer undo/redo > should end up with no history entry
   },
   "previousSelectedElementIds": {},
   "resizingElement": null,
-  "scrollConstraints": null,
   "scrollX": 0,
   "scrollY": 0,
   "searchMatches": null,
@@ -14740,7 +14694,6 @@ exports[`history > singleplayer undo/redo > should iterate through the history w
     "id0": true,
   },
   "resizingElement": null,
-  "scrollConstraints": null,
   "scrollX": 0,
   "scrollY": 0,
   "searchMatches": null,
@@ -14987,7 +14940,6 @@ exports[`history > singleplayer undo/redo > should not clear the redo stack on s
   },
   "previousSelectedElementIds": {},
   "resizingElement": null,
-  "scrollConstraints": null,
   "scrollX": 0,
   "scrollY": 0,
   "searchMatches": null,
@@ -15323,7 +15275,6 @@ exports[`history > singleplayer undo/redo > should not collapse when applying co
   },
   "previousSelectedElementIds": {},
   "resizingElement": null,
-  "scrollConstraints": null,
   "scrollX": 0,
   "scrollY": 0,
   "searchMatches": null,
@@ -15492,7 +15443,6 @@ exports[`history > singleplayer undo/redo > should not end up with history entry
   },
   "previousSelectedElementIds": {},
   "resizingElement": null,
-  "scrollConstraints": null,
   "scrollX": 0,
   "scrollY": 0,
   "searchMatches": null,
@@ -15781,7 +15731,6 @@ exports[`history > singleplayer undo/redo > should not end up with history entry
   },
   "previousSelectedElementIds": {},
   "resizingElement": null,
-  "scrollConstraints": null,
   "scrollX": 0,
   "scrollY": 0,
   "searchMatches": null,
@@ -16046,7 +15995,6 @@ exports[`history > singleplayer undo/redo > should not modify anything on unrela
   },
   "previousSelectedElementIds": {},
   "resizingElement": null,
-  "scrollConstraints": null,
   "scrollX": 0,
   "scrollY": 0,
   "searchMatches": null,
@@ -16200,7 +16148,6 @@ exports[`history > singleplayer undo/redo > should not override appstate changes
     "id0": true,
   },
   "resizingElement": null,
-  "scrollConstraints": null,
   "scrollX": 0,
   "scrollY": 0,
   "searchMatches": null,
@@ -16485,7 +16432,6 @@ exports[`history > singleplayer undo/redo > should support appstate name or view
   },
   "previousSelectedElementIds": {},
   "resizingElement": null,
-  "scrollConstraints": null,
   "scrollX": 0,
   "scrollY": 0,
   "searchMatches": null,
@@ -16648,7 +16594,6 @@ exports[`history > singleplayer undo/redo > should support bidirectional binding
     "id0": true,
   },
   "resizingElement": null,
-  "scrollConstraints": null,
   "scrollX": 0,
   "scrollY": 0,
   "searchMatches": null,
@@ -17398,7 +17343,6 @@ exports[`history > singleplayer undo/redo > should support bidirectional binding
     "id0": true,
   },
   "resizingElement": null,
-  "scrollConstraints": null,
   "scrollX": 0,
   "scrollY": 0,
   "searchMatches": null,
@@ -18046,7 +17990,6 @@ exports[`history > singleplayer undo/redo > should support bidirectional binding
     "id0": true,
   },
   "resizingElement": null,
-  "scrollConstraints": null,
   "scrollX": 0,
   "scrollY": 0,
   "searchMatches": null,
@@ -18692,7 +18635,6 @@ exports[`history > singleplayer undo/redo > should support bidirectional binding
   },
   "previousSelectedElementIds": {},
   "resizingElement": null,
-  "scrollConstraints": null,
   "scrollX": 0,
   "scrollY": 0,
   "searchMatches": null,
@@ -19445,7 +19387,6 @@ exports[`history > singleplayer undo/redo > should support bidirectional binding
     "id0": true,
   },
   "resizingElement": null,
-  "scrollConstraints": null,
   "scrollX": 0,
   "scrollY": 0,
   "searchMatches": null,
@@ -20215,7 +20156,6 @@ exports[`history > singleplayer undo/redo > should support changes in elements'
     "id0": true,
   },
   "resizingElement": null,
-  "scrollConstraints": null,
   "scrollX": 0,
   "scrollY": 0,
   "searchMatches": null,
@@ -20697,7 +20637,6 @@ exports[`history > singleplayer undo/redo > should support duplication of groups
     "id1": true,
   },
   "resizingElement": null,
-  "scrollConstraints": null,
   "scrollX": 0,
   "scrollY": 0,
   "searchMatches": null,
@@ -21210,7 +21149,6 @@ exports[`history > singleplayer undo/redo > should support element creation, del
     "id3": true,
   },
   "resizingElement": null,
-  "scrollConstraints": null,
   "scrollX": 0,
   "scrollY": 0,
   "searchMatches": null,
@@ -21671,7 +21609,6 @@ exports[`history > singleplayer undo/redo > should support linear element creati
     "id0": true,
   },
   "resizingElement": null,
-  "scrollConstraints": null,
   "scrollX": 0,
   "scrollY": 0,
   "searchMatches": null,

packages/excalidraw/tests/__snapshots__/regressionTests.test.tsx.snap

@@ -88,7 +88,6 @@ exports[`given element A and group of elements B and given both are selected whe
     "id6": true,
   },
   "resizingElement": null,
-  "scrollConstraints": null,
   "scrollX": 0,
   "scrollY": 0,
   "scrolledOutside": false,
@@ -516,7 +515,6 @@ exports[`given element A and group of elements B and given both are selected whe
     "id6": true,
   },
   "resizingElement": null,
-  "scrollConstraints": null,
   "scrollX": 0,
   "scrollY": 0,
   "scrolledOutside": false,
@@ -930,7 +928,6 @@ exports[`regression tests > Cmd/Ctrl-click exclusively select element under poin
   },
   "previousSelectedElementIds": {},
   "resizingElement": null,
-  "scrollConstraints": null,
   "scrollX": 0,
   "scrollY": 0,
   "scrolledOutside": false,
@@ -1498,7 +1495,6 @@ exports[`regression tests > Drags selected element when hitting only bounding bo
   },
   "previousSelectedElementIds": {},
   "resizingElement": null,
-  "scrollConstraints": null,
   "scrollX": 0,
   "scrollY": 0,
   "scrolledOutside": false,
@@ -1709,7 +1705,6 @@ exports[`regression tests > adjusts z order when grouping > [end of test] appSta
     "id0": true,
   },
   "resizingElement": null,
-  "scrollConstraints": null,
   "scrollX": 0,
   "scrollY": 0,
   "scrolledOutside": false,
@@ -2095,7 +2090,6 @@ exports[`regression tests > alt-drag duplicates an element > [end of test] appSt
     "id0": true,
   },
   "resizingElement": null,
-  "scrollConstraints": null,
   "scrollX": 0,
   "scrollY": 0,
   "scrolledOutside": false,
@@ -2340,7 +2334,6 @@ exports[`regression tests > arrow keys > [end of test] appState 1`] = `
   },
   "previousSelectedElementIds": {},
   "resizingElement": null,
-  "scrollConstraints": null,
   "scrollX": 0,
   "scrollY": 0,
   "scrolledOutside": false,
@@ -2524,7 +2517,6 @@ exports[`regression tests > can drag element that covers another element, while
     "id6": true,
   },
   "resizingElement": null,
-  "scrollConstraints": null,
   "scrollX": 0,
   "scrollY": 0,
   "scrolledOutside": false,
@@ -2849,7 +2841,6 @@ exports[`regression tests > change the properties of a shape > [end of test] app
   },
   "previousSelectedElementIds": {},
   "resizingElement": null,
-  "scrollConstraints": null,
   "scrollX": 0,
   "scrollY": 0,
   "scrolledOutside": false,
@@ -3108,7 +3099,6 @@ exports[`regression tests > click on an element and drag it > [dragged] appState
     "id0": true,
   },
   "resizingElement": null,
-  "scrollConstraints": null,
   "scrollX": 0,
   "scrollY": 0,
   "scrolledOutside": false,
@@ -3351,7 +3341,6 @@ exports[`regression tests > click on an element and drag it > [end of test] appS
     "id0": true,
   },
   "resizingElement": null,
-  "scrollConstraints": null,
   "scrollX": 0,
   "scrollY": 0,
   "scrolledOutside": false,
@@ -3589,7 +3578,6 @@ exports[`regression tests > click to select a shape > [end of test] appState 1`]
     "id3": true,
   },
   "resizingElement": null,
-  "scrollConstraints": null,
   "scrollX": 0,
   "scrollY": 0,
   "scrolledOutside": false,
@@ -3849,7 +3837,6 @@ exports[`regression tests > click-drag to select a group > [end of test] appStat
     "id6": true,
   },
   "resizingElement": null,
-  "scrollConstraints": null,
   "scrollX": 0,
   "scrollY": 0,
   "scrolledOutside": false,
@@ -4163,7 +4150,6 @@ exports[`regression tests > deleting last but one element in editing group shoul
   },
   "previousSelectedElementIds": {},
   "resizingElement": null,
-  "scrollConstraints": null,
   "scrollX": 0,
   "scrollY": 0,
   "scrolledOutside": false,
@@ -4604,7 +4590,6 @@ exports[`regression tests > deselects group of selected elements on pointer down
     "id3": true,
   },
   "resizingElement": null,
-  "scrollConstraints": null,
   "scrollX": 0,
   "scrollY": 0,
   "scrolledOutside": false,
@@ -4889,7 +4874,6 @@ exports[`regression tests > deselects group of selected elements on pointer up w
     "id3": true,
   },
   "resizingElement": null,
-  "scrollConstraints": null,
   "scrollX": 0,
   "scrollY": 0,
   "scrolledOutside": false,
@@ -5166,7 +5150,6 @@ exports[`regression tests > deselects selected element on pointer down when poin
     "id0": true,
   },
   "resizingElement": null,
-  "scrollConstraints": null,
   "scrollX": 0,
   "scrollY": 0,
   "scrolledOutside": false,
@@ -5376,7 +5359,6 @@ exports[`regression tests > deselects selected element, on pointer up, when clic
     "id0": true,
   },
   "resizingElement": null,
-  "scrollConstraints": null,
   "scrollX": 0,
   "scrollY": 0,
   "scrolledOutside": false,
@@ -5576,7 +5558,6 @@ exports[`regression tests > double click to edit a group > [end of test] appStat
   },
   "previousSelectedElementIds": {},
   "resizingElement": null,
-  "scrollConstraints": null,
   "scrollX": 0,
   "scrollY": 0,
   "scrolledOutside": false,
@@ -5974,7 +5955,6 @@ exports[`regression tests > drags selected elements from point inside common bou
     "id3": true,
   },
   "resizingElement": null,
-  "scrollConstraints": null,
   "scrollX": 0,
   "scrollY": 0,
   "scrolledOutside": false,
@@ -6270,7 +6250,6 @@ exports[`regression tests > draw every type of shape > [end of test] appState 1`
   },
   "previousSelectedElementIds": {},
   "resizingElement": null,
-  "scrollConstraints": null,
   "scrollX": 0,
   "scrollY": 0,
   "scrolledOutside": false,
@@ -7063,7 +7042,6 @@ exports[`regression tests > given a group of selected elements with an element t
     "id6": true,
   },
   "resizingElement": null,
-  "scrollConstraints": null,
   "scrollX": 0,
   "scrollY": 0,
   "scrolledOutside": false,
@@ -7398,7 +7376,6 @@ exports[`regression tests > given a selected element A and a not selected elemen
     "id0": true,
   },
   "resizingElement": null,
-  "scrollConstraints": null,
   "scrollX": 0,
   "scrollY": 0,
   "scrolledOutside": false,
@@ -7679,7 +7656,6 @@ exports[`regression tests > given selected element A with lower z-index than uns
     "id0": true,
   },
   "resizingElement": null,
-  "scrollConstraints": null,
   "scrollX": 0,
   "scrollY": 0,
   "scrolledOutside": false,
@@ -7916,7 +7892,6 @@ exports[`regression tests > given selected element A with lower z-index than uns
     "id0": true,
   },
   "resizingElement": null,
-  "scrollConstraints": null,
   "scrollX": 0,
   "scrollY": 0,
   "scrolledOutside": false,
@@ -8156,7 +8131,6 @@ exports[`regression tests > key 2 selects rectangle tool > [end of test] appStat
   },
   "previousSelectedElementIds": {},
   "resizingElement": null,
-  "scrollConstraints": null,
   "scrollX": 0,
   "scrollY": 0,
   "scrolledOutside": false,
@@ -8338,7 +8312,6 @@ exports[`regression tests > key 3 selects diamond tool > [end of test] appState
   },
   "previousSelectedElementIds": {},
   "resizingElement": null,
-  "scrollConstraints": null,
   "scrollX": 0,
   "scrollY": 0,
   "scrolledOutside": false,
@@ -8520,7 +8493,6 @@ exports[`regression tests > key 4 selects ellipse tool > [end of test] appState
   },
   "previousSelectedElementIds": {},
   "resizingElement": null,
-  "scrollConstraints": null,
   "scrollX": 0,
   "scrollY": 0,
   "scrolledOutside": false,
@@ -8702,7 +8674,6 @@ exports[`regression tests > key 5 selects arrow tool > [end of test] appState 1`
   },
   "previousSelectedElementIds": {},
   "resizingElement": null,
-  "scrollConstraints": null,
   "scrollX": 0,
   "scrollY": 0,
   "scrolledOutside": false,
@@ -8936,7 +8907,6 @@ exports[`regression tests > key 6 selects line tool > [end of test] appState 1`]
   },
   "previousSelectedElementIds": {},
   "resizingElement": null,
-  "scrollConstraints": null,
   "scrollX": 0,
   "scrollY": 0,
   "scrolledOutside": false,
@@ -9168,7 +9138,6 @@ exports[`regression tests > key 7 selects freedraw tool > [end of test] appState
   },
   "previousSelectedElementIds": {},
   "resizingElement": null,
-  "scrollConstraints": null,
   "scrollX": 0,
   "scrollY": 0,
   "scrolledOutside": false,
@@ -9362,7 +9331,6 @@ exports[`regression tests > key a selects arrow tool > [end of test] appState 1`
   },
   "previousSelectedElementIds": {},
   "resizingElement": null,
-  "scrollConstraints": null,
   "scrollX": 0,
   "scrollY": 0,
   "scrolledOutside": false,
@@ -9596,7 +9564,6 @@ exports[`regression tests > key d selects diamond tool > [end of test] appState
   },
   "previousSelectedElementIds": {},
   "resizingElement": null,
-  "scrollConstraints": null,
   "scrollX": 0,
   "scrollY": 0,
   "scrolledOutside": false,
@@ -9778,7 +9745,6 @@ exports[`regression tests > key l selects line tool > [end of test] appState 1`]
   },
   "previousSelectedElementIds": {},
   "resizingElement": null,
-  "scrollConstraints": null,
   "scrollX": 0,
   "scrollY": 0,
   "scrolledOutside": false,
@@ -10010,7 +9976,6 @@ exports[`regression tests > key o selects ellipse tool > [end of test] appState
   },
   "previousSelectedElementIds": {},
   "resizingElement": null,
-  "scrollConstraints": null,
   "scrollX": 0,
   "scrollY": 0,
   "scrolledOutside": false,
@@ -10192,7 +10157,6 @@ exports[`regression tests > key p selects freedraw tool > [end of test] appState
   },
   "previousSelectedElementIds": {},
   "resizingElement": null,
-  "scrollConstraints": null,
   "scrollX": 0,
   "scrollY": 0,
   "scrolledOutside": false,
@@ -10386,7 +10350,6 @@ exports[`regression tests > key r selects rectangle tool > [end of test] appStat
   },
   "previousSelectedElementIds": {},
   "resizingElement": null,
-  "scrollConstraints": null,
   "scrollX": 0,
   "scrollY": 0,
   "scrolledOutside": false,
@@ -10572,7 +10535,6 @@ exports[`regression tests > make a group and duplicate it > [end of test] appSta
     "id6": true,
   },
   "resizingElement": null,
-  "scrollConstraints": null,
   "scrollX": 0,
   "scrollY": 0,
   "scrolledOutside": false,
@@ -11103,7 +11065,6 @@ exports[`regression tests > noop interaction after undo shouldn't create history
     "id0": true,
   },
   "resizingElement": null,
-  "scrollConstraints": null,
   "scrollX": 0,
   "scrollY": 0,
   "scrolledOutside": false,
@@ -11383,7 +11344,6 @@ exports[`regression tests > pinch-to-zoom works > [end of test] appState 1`] = `
   },
   "previousSelectedElementIds": {},
   "resizingElement": null,
-  "scrollConstraints": null,
   "scrollX": "-6.25000",
   "scrollY": 0,
   "scrolledOutside": false,
@@ -11510,7 +11470,6 @@ exports[`regression tests > shift click on selected element should deselect it o
     "id0": true,
   },
   "resizingElement": null,
-  "scrollConstraints": null,
   "scrollX": 0,
   "scrollY": 0,
   "scrolledOutside": false,
@@ -11713,7 +11672,6 @@ exports[`regression tests > shift-click to multiselect, then drag > [end of test
     "id3": true,
   },
   "resizingElement": null,
-  "scrollConstraints": null,
   "scrollX": 0,
   "scrollY": 0,
   "scrolledOutside": false,
@@ -12035,7 +11993,6 @@ exports[`regression tests > should group elements and ungroup them > [end of tes
     "id6": true,
   },
   "resizingElement": null,
-  "scrollConstraints": null,
   "scrollX": 0,
   "scrollY": 0,
   "scrolledOutside": false,
@@ -12467,7 +12424,6 @@ exports[`regression tests > single-clicking on a subgroup of a selected group sh
     "id3": true,
   },
   "resizingElement": null,
-  "scrollConstraints": null,
   "scrollX": 0,
   "scrollY": 0,
   "scrolledOutside": false,
@@ -13107,7 +13063,6 @@ exports[`regression tests > spacebar + drag scrolls the canvas > [end of test] a
   },
   "previousSelectedElementIds": {},
   "resizingElement": null,
-  "scrollConstraints": null,
   "scrollX": 60,
   "scrollY": 60,
   "scrolledOutside": false,
@@ -13234,7 +13189,6 @@ exports[`regression tests > supports nested groups > [end of test] appState 1`]
     "id0": true,
   },
   "resizingElement": null,
-  "scrollConstraints": null,
   "scrollX": 0,
   "scrollY": 0,
   "scrolledOutside": false,
@@ -13868,7 +13822,6 @@ exports[`regression tests > switches from group of selected elements to another
     "id6": true,
   },
   "resizingElement": null,
-  "scrollConstraints": null,
   "scrollX": 0,
   "scrollY": 0,
   "scrolledOutside": false,
@@ -14208,7 +14161,6 @@ exports[`regression tests > switches selected element on pointer down > [end of
     "id3": true,
   },
   "resizingElement": null,
-  "scrollConstraints": null,
   "scrollX": 0,
   "scrollY": 0,
   "scrolledOutside": false,
@@ -14472,7 +14424,6 @@ exports[`regression tests > two-finger scroll works > [end of test] appState 1`]
   },
   "previousSelectedElementIds": {},
   "resizingElement": null,
-  "scrollConstraints": null,
   "scrollX": 20,
   "scrollY": "-18.53553",
   "scrolledOutside": false,
@@ -14597,7 +14548,6 @@ exports[`regression tests > undo/redo drawing an element > [end of test] appStat
   },
   "previousSelectedElementIds": {},
   "resizingElement": null,
-  "scrollConstraints": null,
   "scrollX": 0,
   "scrollY": 0,
   "scrolledOutside": false,
@@ -14963,7 +14913,6 @@ exports[`regression tests > updates fontSize & fontFamily appState > [end of tes
   },
   "previousSelectedElementIds": {},
   "resizingElement": null,
-  "scrollConstraints": null,
   "scrollX": 0,
   "scrollY": 0,
   "scrolledOutside": false,
@@ -15091,7 +15040,6 @@ exports[`regression tests > zoom hotkeys > [end of test] appState 1`] = `
   },
   "previousSelectedElementIds": {},
   "resizingElement": null,
-  "scrollConstraints": null,
   "scrollX": 0,
   "scrollY": 0,
   "scrolledOutside": false,

packages/excalidraw/tests/scrollConstraints.test.tsx

@@ -1,135 +0,0 @@
-import React from "react";
-import { vi } from "vitest";
-
-import { resolvablePromise } from "@excalidraw/common";
-
-import { Excalidraw } from "../index";
-
-import { API } from "./helpers/api";
-import { act, render, waitFor } from "./test-utils";
-
-import type { ExcalidrawImperativeAPI, ScrollConstraints } from "../types";
-
-const FIRST_SCROLL_CONSTRAINTS: ScrollConstraints = {
-  x: 0,
-  y: 0,
-  width: 400,
-  height: 300,
-  lockZoom: true,
-  overscrollAllowance: 0,
-  viewportZoomFactor: 1,
-  animateOnNextUpdate: false,
-};
-
-const SECOND_SCROLL_CONSTRAINTS: ScrollConstraints = {
-  x: 100,
-  y: 200,
-  width: 500,
-  height: 350,
-  lockZoom: false,
-  overscrollAllowance: 0.2,
-  viewportZoomFactor: 0.8,
-  animateOnNextUpdate: false,
-};
-
-describe("scrollConstraints", () => {
-  afterEach(() => {
-    vi.restoreAllMocks();
-  });
-
-  it("syncs prop updates after mount", async () => {
-    const { rerender } = await render(<Excalidraw />);
-
-    expect(window.h.state.scrollConstraints).toBe(null);
-
-    rerender(<Excalidraw scrollConstraints={FIRST_SCROLL_CONSTRAINTS} />);
-
-    await waitFor(() => {
-      expect(window.h.state.scrollConstraints).toEqual(
-        FIRST_SCROLL_CONSTRAINTS,
-      );
-    });
-
-    rerender(<Excalidraw scrollConstraints={SECOND_SCROLL_CONSTRAINTS} />);
-
-    await waitFor(() => {
-      expect(window.h.state.scrollConstraints).toEqual(
-        SECOND_SCROLL_CONSTRAINTS,
-      );
-    });
-
-    rerender(<Excalidraw />);
-
-    await waitFor(() => {
-      expect(window.h.state.scrollConstraints).toBe(null);
-    });
-  });
-
-  it("ignores setScrollConstraints() when the prop is controlled", async () => {
-    const excalidrawAPIPromise = resolvablePromise<ExcalidrawImperativeAPI>();
-    const warn = vi.spyOn(console, "warn").mockImplementation(() => {});
-
-    await render(
-      <Excalidraw
-        scrollConstraints={FIRST_SCROLL_CONSTRAINTS}
-        onExcalidrawAPI={(api) => {
-          if (api) {
-            excalidrawAPIPromise.resolve(api);
-          }
-        }}
-      />,
-    );
-
-    const excalidrawAPI = await excalidrawAPIPromise;
-
-    act(() => {
-      excalidrawAPI.setScrollConstraints(SECOND_SCROLL_CONSTRAINTS);
-    });
-
-    expect(warn).toHaveBeenCalledWith(
-      "Excalidraw: `setScrollConstraints()` is ignored when the `scrollConstraints` prop is controlled. Update the prop value instead.",
-    );
-    expect(window.h.state.scrollConstraints).toEqual(FIRST_SCROLL_CONSTRAINTS);
-  });
-
-  it("ignores scrollToContent() scrollLock when the prop is controlled", async () => {
-    const excalidrawAPIPromise = resolvablePromise<ExcalidrawImperativeAPI>();
-    const warn = vi.spyOn(console, "warn").mockImplementation(() => {});
-
-    await render(
-      <Excalidraw
-        scrollConstraints={FIRST_SCROLL_CONSTRAINTS}
-        onExcalidrawAPI={(api) => {
-          if (api) {
-            excalidrawAPIPromise.resolve(api);
-          }
-        }}
-      />,
-    );
-
-    const excalidrawAPI = await excalidrawAPIPromise;
-    const rectangle = API.createElement({
-      x: 1000,
-      y: 1000,
-      width: 100,
-      height: 100,
-    });
-    API.setElements([rectangle]);
-
-    act(() => {
-      excalidrawAPI.scrollToContent(rectangle, {
-        animate: false,
-        fitToViewport: true,
-        scrollLock: {
-          lockZoom: true,
-          overscrollAllowance: 0,
-        },
-      });
-    });
-
-    expect(warn).toHaveBeenCalledWith(
-      "Excalidraw: `scrollToContent()` with `scrollLock` is ignored when the `scrollConstraints` prop is controlled. Update the prop value instead.",
-    );
-    expect(window.h.state.scrollConstraints).toEqual(FIRST_SCROLL_CONSTRAINTS);
-  });
-});

packages/excalidraw/tests/test-utils.ts

@@ -449,29 +449,28 @@ const stripProps = (
   }, {} as Record<string, any>);
 
 export const checkpointHistory = (history: History, name: string) => {
-  expect(
+  const normalizeHistoryEntry = (entry: History["undoStack"][number]) => {
-    history.undoStack.map((x) => ({
+    const { markers, ...rest } = entry;
-      ...x,
-      elements: {
-        ...x.elements,
-        added: stripProps(x.elements.added, ["seed", "versionNonce"]),
-        removed: stripProps(x.elements.removed, ["seed", "versionNonce"]),
-        updated: stripProps(x.elements.updated, ["seed", "versionNonce"]),
-      },
-    })),
-  ).toMatchSnapshot(`[${name}] undo stack`);
 
-  expect(
+    return {
-    history.redoStack.map((x) => ({
+      ...rest,
-      ...x,
+      ...(markers ? { markers } : {}),
       elements: {
-        ...x.elements,
+        ...entry.elements,
-        added: stripProps(x.elements.added, ["seed", "versionNonce"]),
+        added: stripProps(entry.elements.added, ["seed", "versionNonce"]),
-        removed: stripProps(x.elements.removed, ["seed", "versionNonce"]),
+        removed: stripProps(entry.elements.removed, ["seed", "versionNonce"]),
-        updated: stripProps(x.elements.updated, ["seed", "versionNonce"]),
+        updated: stripProps(entry.elements.updated, ["seed", "versionNonce"]),
       },
-    })),
+    };
-  ).toMatchSnapshot(`[${name}] redo stack`);
+  };
+
+  expect(history.undoStack.map(normalizeHistoryEntry)).toMatchSnapshot(
+    `[${name}] undo stack`,
+  );
+
+  expect(history.redoStack.map(normalizeHistoryEntry)).toMatchSnapshot(
+    `[${name}] redo stack`,
+  );
 };
 
 /**

packages/excalidraw/transaction/diff.ts

@@ -0,0 +1,289 @@
+import { type StoreDelta } from "@excalidraw/element";
+
+import type { Delta } from "@excalidraw/element";
+
+import type { Mutable } from "@excalidraw/common/utility-types";
+import type {
+  ExcalidrawElement,
+  OrderedExcalidrawElement,
+  SceneElementsMap,
+} from "@excalidraw/element/types";
+
+import type {
+  ElementChange,
+  ElementPropName,
+  TouchedElementProps,
+} from "./types";
+
+const LEDGER_IGNORED_PROPS = new Set([
+  "version",
+  "versionNonce",
+  "seed",
+  "updated",
+  "index",
+]);
+
+export const TX_UNDO_OVERRIDE_IGNORED_PROPS = new Set([
+  "version",
+  "versionNonce",
+  "isDeleted",
+]);
+
+type ElementRecord = Record<string, unknown>;
+export type ElementUpdatedProps = Omit<
+  Partial<OrderedExcalidrawElement>,
+  "id" | "updated" | "seed"
+>;
+export type ElementUpdatedPropName = Extract<keyof ElementUpdatedProps, string>;
+type ElementPropValueMap = ElementUpdatedProps;
+
+export type ElementUpdatedEntry = Delta<ElementPropValueMap>;
+export type ElementUpdatedEntryMap = Record<string, ElementUpdatedEntry>;
+
+const isPlainObject = (value: unknown): value is Record<string, unknown> =>
+  !!value && typeof value === "object" && !Array.isArray(value);
+
+export const getElementProp = <TProp extends ElementPropName>(
+  element: ExcalidrawElement,
+  prop: TProp,
+): ExcalidrawElement[TProp] =>
+  (element as ElementRecord)[prop] as ExcalidrawElement[TProp];
+
+export const setOrderedElementProp = <TProp extends ElementPropName>(
+  element: Mutable<OrderedExcalidrawElement>,
+  prop: TProp,
+  value: OrderedExcalidrawElement[TProp],
+) => {
+  (element as ElementRecord)[prop] = value;
+};
+
+/** Deep equality used by ledger conflict/touched-prop detection. */
+export const isLedgerValueEqual = (left: unknown, right: unknown): boolean => {
+  if (Object.is(left, right)) {
+    return true;
+  }
+
+  if (Array.isArray(left) && Array.isArray(right)) {
+    if (left.length !== right.length) {
+      return false;
+    }
+    for (let index = 0; index < left.length; index += 1) {
+      if (!isLedgerValueEqual(left[index], right[index])) {
+        return false;
+      }
+    }
+    return true;
+  }
+
+  if (isPlainObject(left) && isPlainObject(right)) {
+    const leftKeys = Object.keys(left);
+    const rightKeys = Object.keys(right);
+    if (leftKeys.length !== rightKeys.length) {
+      return false;
+    }
+    for (const key of leftKeys) {
+      if (!Object.prototype.hasOwnProperty.call(right, key)) {
+        return false;
+      }
+      if (!isLedgerValueEqual(left[key], right[key])) {
+        return false;
+      }
+    }
+    return true;
+  }
+
+  return false;
+};
+
+/** Shallow-copies a scene map. Entries share references with the original. */
+export const shallowCopySceneElements = (
+  elements: ReadonlyMap<string, ExcalidrawElement>,
+): SceneElementsMap => new Map(elements) as SceneElementsMap;
+
+export const createAllTouchedElementProps = (): TouchedElementProps => ({
+  kind: "all",
+});
+
+export const createPartialTouchedElementProps = (
+  props: Iterable<ElementPropName> = [],
+): TouchedElementProps => ({
+  kind: "partial",
+  props: new Set(props),
+});
+
+export const hasTouchedProps = (touchedProps: TouchedElementProps): boolean =>
+  touchedProps.kind === "all" || touchedProps.props.size > 0;
+
+export const touchesWholeElement = (
+  touchedProps: TouchedElementProps,
+): boolean => touchedProps.kind === "all";
+
+export const isPartialTouchedProps = (
+  touchedProps: TouchedElementProps,
+): touchedProps is Extract<TouchedElementProps, { kind: "partial" }> =>
+  touchedProps.kind === "partial";
+
+export const hasTouchedProp = (
+  touchedProps: TouchedElementProps,
+  prop: ElementPropName,
+): boolean => touchedProps.kind === "all" || touchedProps.props.has(prop);
+
+export const mergeTouchedProps = (
+  left: TouchedElementProps,
+  right: TouchedElementProps,
+): TouchedElementProps => {
+  if (left.kind === "all" || right.kind === "all") {
+    return createAllTouchedElementProps();
+  }
+
+  return createPartialTouchedElementProps([...left.props, ...right.props]);
+};
+
+/** Returns changed property names between two element snapshots. */
+export const collectTouchedProps = (
+  before: ExcalidrawElement | null,
+  after: ExcalidrawElement | null,
+): TouchedElementProps => {
+  if (!before || !after) {
+    return createAllTouchedElementProps();
+  }
+
+  const touchedProps = new Set<ElementPropName>();
+  const keys = new Set<ElementPropName>([
+    ...(Object.keys(before) as ElementPropName[]),
+    ...(Object.keys(after) as ElementPropName[]),
+  ]);
+
+  for (const key of keys) {
+    if (LEDGER_IGNORED_PROPS.has(key)) {
+      continue;
+    }
+    if (
+      !isLedgerValueEqual(
+        getElementProp(before, key),
+        getElementProp(after, key),
+      )
+    ) {
+      touchedProps.add(key);
+    }
+  }
+
+  return createPartialTouchedElementProps(touchedProps);
+};
+
+/** Returns ids whose element snapshot changed between two points in time. */
+export const collectChangedElementIds = (
+  before: ReadonlyMap<string, ExcalidrawElement>,
+  after: ReadonlyMap<string, ExcalidrawElement>,
+) => collectElementChanges(before, after).map((change) => change.id);
+
+export const collectElementChanges = (
+  before: ReadonlyMap<string, ExcalidrawElement>,
+  after: ReadonlyMap<string, ExcalidrawElement>,
+): ElementChange[] => {
+  const changes: ElementChange[] = [];
+  const candidateIds = new Set<string>([...before.keys(), ...after.keys()]);
+
+  for (const id of candidateIds) {
+    const beforeElement = before.get(id) ?? null;
+    const afterElement = after.get(id) ?? null;
+    const touchedProps = collectTouchedProps(beforeElement, afterElement);
+    if (!hasTouchedProps(touchedProps)) {
+      continue;
+    }
+
+    changes.push({
+      id,
+      before: beforeElement,
+      after: afterElement,
+      touchedProps,
+    });
+  }
+
+  return changes;
+};
+
+export const serializeConsumedPropKey = (
+  elementId: string,
+  prop: ElementPropName,
+) => `${elementId}\u0000${prop}`;
+
+export const getUpdatedElementEntries = (delta: StoreDelta) =>
+  delta.elements.updated as ElementUpdatedEntryMap;
+
+export const getElementPropEntries = (props: ElementPropValueMap) =>
+  Object.entries(props) as [
+    ElementUpdatedPropName,
+    ElementUpdatedProps[ElementUpdatedPropName],
+  ][];
+
+export const hasUpdatedElementEntries = (delta: StoreDelta) =>
+  Object.keys(getUpdatedElementEntries(delta)).length > 0;
+
+export const serializeIntermediateValue = (value: unknown): string => {
+  const serialize = (input: unknown, seen: WeakSet<object>): string => {
+    if (input === null) {
+      return "null";
+    }
+
+    switch (typeof input) {
+      case "undefined":
+        return "undefined";
+      case "boolean":
+        return input ? "boolean:true" : "boolean:false";
+      case "number":
+        if (Number.isNaN(input)) {
+          return "number:NaN";
+        }
+        if (Object.is(input, -0)) {
+          return "number:-0";
+        }
+        return `number:${input}`;
+      case "bigint":
+        return `bigint:${input.toString()}`;
+      case "string":
+        return `string:${JSON.stringify(input)}`;
+      case "symbol":
+        return `symbol:${String(input)}`;
+      case "function":
+        return `function:${input.name}`;
+      case "object":
+        break;
+      default:
+        return `unknown:${String(input)}`;
+    }
+
+    if (Array.isArray(input)) {
+      if (seen.has(input)) {
+        return "[CircularArray]";
+      }
+      seen.add(input);
+      const serialized = `[${input
+        .map((item) => serialize(item, seen))
+        .join(",")}]`;
+      seen.delete(input);
+      return serialized;
+    }
+
+    if (isPlainObject(input)) {
+      if (seen.has(input)) {
+        return "{CircularObject}";
+      }
+      seen.add(input);
+      const serialized = `{${Object.keys(input)
+        .sort()
+        .map((key) => `${JSON.stringify(key)}:${serialize(input[key], seen)}`)
+        .join(",")}}`;
+      seen.delete(input);
+      return serialized;
+    }
+
+    try {
+      return `object:${JSON.stringify(input)}`;
+    } catch {
+      return `object:${Object.prototype.toString.call(input)}`;
+    }
+  };
+
+  return serialize(value, new WeakSet<object>());
+};

packages/excalidraw/transaction/index.ts

@@ -0,0 +1,13 @@
+export { collectChangedElementIds } from "./diff";
+export { TransactionLedger } from "./ledger";
+export { Transaction } from "./transaction";
+export { TransactionManager } from "./manager";
+
+export type {
+  AppStateResolver,
+  AppStateResolverContext,
+  TransactionElementUpdate,
+  TransactionLedgerEntry,
+  TransactionStatus,
+  TransactionSummary,
+} from "./types";

packages/excalidraw/transaction/ledger.ts

@@ -0,0 +1,333 @@
+import { deepCopyElement } from "@excalidraw/element";
+
+import type { Mutable } from "@excalidraw/common/utility-types";
+import type {
+  ExcalidrawElement,
+  OrderedExcalidrawElement,
+  SceneElementsMap,
+} from "@excalidraw/element/types";
+
+import {
+  collectElementChanges,
+  collectTouchedProps,
+  getElementProp,
+  hasTouchedProps,
+  isLedgerValueEqual,
+  mergeTouchedProps,
+  setOrderedElementProp,
+  shallowCopySceneElements,
+  touchesWholeElement,
+} from "./diff";
+
+import type { TransactionLedgerEntry } from "./types";
+
+/**
+ * Keeps transaction-level scene mutations and materializes synthetic snapshots
+ * for a single durable history commit.
+ */
+export class TransactionLedger {
+  private readonly entries = new Map<string, TransactionLedgerEntry>();
+
+  /** Whether the transaction has any net element mutations. */
+  hasEntries() {
+    return this.entries.size > 0;
+  }
+
+  /** Returns the ledger entry for an element, if any. */
+  getEntry(elementId: string): TransactionLedgerEntry | undefined {
+    return this.entries.get(elementId);
+  }
+
+  /** Releases all ledger entries. */
+  clear() {
+    this.entries.clear();
+  }
+
+  /** Records one element mutation step into the ledger. */
+  recordStep(
+    before: ReadonlyMap<string, ExcalidrawElement>,
+    after: ReadonlyMap<string, ExcalidrawElement>,
+  ) {
+    for (const change of collectElementChanges(before, after)) {
+      const {
+        id: elementId,
+        before: beforeElement,
+        after: afterElement,
+        touchedProps,
+      } = change;
+
+      const existing = this.entries.get(elementId);
+      if (!existing) {
+        this.entries.set(elementId, {
+          baselineElement: beforeElement
+            ? deepCopyElement(beforeElement)
+            : null,
+          targetElement: afterElement ? deepCopyElement(afterElement) : null,
+          touchedProps,
+        });
+        continue;
+      }
+
+      existing.targetElement = afterElement
+        ? deepCopyElement(afterElement)
+        : null;
+      existing.touchedProps = mergeTouchedProps(
+        existing.touchedProps,
+        touchedProps,
+      );
+
+      // Created then deleted inside one transaction leaves no durable footprint.
+      if (!existing.baselineElement && !existing.targetElement) {
+        this.entries.delete(elementId);
+        continue;
+      }
+      if (!existing.baselineElement && existing.targetElement?.isDeleted) {
+        this.entries.delete(elementId);
+      }
+    }
+  }
+
+  /**
+   * Builds synthetic element before/after snapshots with a fixed
+   * "live-wins-per-prop" strategy.
+   */
+  buildSyntheticSnapshots(live: ReadonlyMap<string, ExcalidrawElement>) {
+    // Shallow copy — untouched elements stay as live references.
+    // Only elements mutated in-place (prop-level updates) are deep-copied below.
+    const elementsBefore = shallowCopySceneElements(live);
+    const elementsAfter = shallowCopySceneElements(live);
+
+    for (const [elementId, entry] of this.entries) {
+      this.reconcileEntrySnapshots(
+        elementId,
+        entry,
+        live,
+        elementsBefore,
+        elementsAfter,
+      );
+    }
+
+    return { elementsBefore, elementsAfter };
+  }
+
+  private reconcileEntrySnapshots(
+    elementId: string,
+    entry: TransactionLedgerEntry,
+    live: ReadonlyMap<string, ExcalidrawElement>,
+    elementsBefore: SceneElementsMap,
+    elementsAfter: SceneElementsMap,
+  ) {
+    if (!entry.baselineElement) {
+      this.applyCreatedElementSnapshots(
+        elementId,
+        entry.targetElement,
+        live,
+        elementsBefore,
+        elementsAfter,
+      );
+      return;
+    }
+
+    if (!entry.targetElement) {
+      this.applyDeletedElementSnapshots(
+        elementId,
+        entry.baselineElement,
+        live,
+        elementsBefore,
+        elementsAfter,
+      );
+      return;
+    }
+
+    this.applyUpdatedElementSnapshots(
+      elementId,
+      entry,
+      live,
+      elementsBefore,
+      elementsAfter,
+    );
+  }
+
+  private applyCreatedElementSnapshots(
+    elementId: string,
+    targetElement: ExcalidrawElement | null,
+    live: ReadonlyMap<string, ExcalidrawElement>,
+    elementsBefore: SceneElementsMap,
+    elementsAfter: SceneElementsMap,
+  ) {
+    if (!targetElement) {
+      return;
+    }
+
+    const liveElement = live.get(elementId) ?? null;
+    if (
+      !liveElement ||
+      liveElement.isDeleted ||
+      hasTouchedProps(collectTouchedProps(targetElement, liveElement))
+    ) {
+      return;
+    }
+
+    elementsBefore.delete(elementId);
+    elementsAfter.set(
+      elementId,
+      deepCopyElement(targetElement) as OrderedExcalidrawElement,
+    );
+  }
+
+  private applyDeletedElementSnapshots(
+    elementId: string,
+    baselineElement: ExcalidrawElement,
+    live: ReadonlyMap<string, ExcalidrawElement>,
+    elementsBefore: SceneElementsMap,
+    elementsAfter: SceneElementsMap,
+  ) {
+    const liveElement = live.get(elementId) ?? null;
+    if (liveElement && !liveElement.isDeleted) {
+      return;
+    }
+
+    elementsBefore.set(
+      elementId,
+      deepCopyElement(baselineElement) as OrderedExcalidrawElement,
+    );
+    elementsAfter.delete(elementId);
+  }
+
+  private applyUpdatedElementSnapshots(
+    elementId: string,
+    entry: TransactionLedgerEntry,
+    live: ReadonlyMap<string, ExcalidrawElement>,
+    elementsBefore: SceneElementsMap,
+    elementsAfter: SceneElementsMap,
+  ) {
+    const liveElement = live.get(elementId) ?? null;
+    const targetElement = entry.targetElement;
+    const baselineElement = entry.baselineElement;
+    const beforeElement = elementsBefore.get(elementId);
+    const afterElement = elementsAfter.get(elementId);
+
+    if (
+      !liveElement ||
+      !baselineElement ||
+      !targetElement ||
+      !beforeElement ||
+      !afterElement
+    ) {
+      return;
+    }
+
+    if (touchesWholeElement(entry.touchedProps)) {
+      this.applyWholeElementSnapshots(
+        elementId,
+        baselineElement,
+        targetElement,
+        liveElement,
+        elementsBefore,
+        elementsAfter,
+      );
+      return;
+    }
+
+    this.applyPerPropSnapshots({
+      entry,
+      liveElement,
+      baselineElement,
+      targetElement,
+      beforeElement,
+      afterElement,
+      elementId,
+      elementsBefore,
+      elementsAfter,
+    });
+  }
+
+  private applyWholeElementSnapshots(
+    elementId: string,
+    baselineElement: ExcalidrawElement,
+    targetElement: ExcalidrawElement,
+    liveElement: ExcalidrawElement,
+    elementsBefore: SceneElementsMap,
+    elementsAfter: SceneElementsMap,
+  ) {
+    const hasLiveConflict = hasTouchedProps(
+      collectTouchedProps(targetElement, liveElement),
+    );
+    if (hasLiveConflict) {
+      return;
+    }
+
+    elementsBefore.set(
+      elementId,
+      deepCopyElement(baselineElement) as OrderedExcalidrawElement,
+    );
+    elementsAfter.set(
+      elementId,
+      deepCopyElement(targetElement) as OrderedExcalidrawElement,
+    );
+  }
+
+  private applyPerPropSnapshots(args: {
+    entry: TransactionLedgerEntry;
+    liveElement: ExcalidrawElement;
+    baselineElement: ExcalidrawElement;
+    targetElement: ExcalidrawElement;
+    beforeElement: ExcalidrawElement;
+    afterElement: ExcalidrawElement;
+    elementId: string;
+    elementsBefore: SceneElementsMap;
+    elementsAfter: SceneElementsMap;
+  }) {
+    const {
+      entry,
+      liveElement,
+      baselineElement,
+      targetElement,
+      beforeElement,
+      afterElement,
+      elementId,
+      elementsBefore,
+      elementsAfter,
+    } = args;
+
+    // Deep-copy before mutating so we never touch live elements.
+    const mutableBefore = deepCopyElement(
+      beforeElement,
+    ) as Mutable<OrderedExcalidrawElement>;
+    const mutableAfter = deepCopyElement(
+      afterElement,
+    ) as Mutable<OrderedExcalidrawElement>;
+    elementsBefore.set(elementId, mutableBefore as OrderedExcalidrawElement);
+    elementsAfter.set(elementId, mutableAfter as OrderedExcalidrawElement);
+
+    if (entry.touchedProps.kind !== "partial") {
+      return;
+    }
+
+    let appliedProps = 0;
+    for (const prop of entry.touchedProps.props) {
+      const liveValue = getElementProp(liveElement, prop);
+      const targetValue = getElementProp(targetElement, prop);
+      if (!isLedgerValueEqual(liveValue, targetValue)) {
+        continue;
+      }
+
+      setOrderedElementProp(
+        mutableBefore,
+        prop,
+        getElementProp(baselineElement, prop),
+      );
+      setOrderedElementProp(mutableAfter, prop, targetValue);
+      appliedProps += 1;
+    }
+
+    if (appliedProps === 0) {
+      return;
+    }
+
+    mutableBefore.version = baselineElement.version;
+    mutableBefore.versionNonce = baselineElement.versionNonce;
+    mutableAfter.version = targetElement.version;
+    mutableAfter.versionNonce = targetElement.versionNonce;
+  }
+}

packages/excalidraw/transaction/manager.ts

@@ -0,0 +1,291 @@
+import {
+  Delta,
+  ElementsDelta,
+  mergeStoreDeltaMarkers,
+  type StoreDelta,
+  type TxUndoOverride,
+} from "@excalidraw/element";
+
+import type { Mutable } from "@excalidraw/common/utility-types";
+
+import {
+  HistoryDelta,
+  type HistoryBeforeRecordListener,
+  type HistoryEffectiveDeltaResolverContext,
+} from "../history";
+
+import {
+  type ElementUpdatedPropName,
+  getUpdatedElementEntries,
+  hasUpdatedElementEntries,
+  isLedgerValueEqual,
+  type ElementUpdatedProps,
+  type ElementUpdatedEntryMap,
+} from "./diff";
+import { Transaction } from "./transaction";
+
+import type { AppClassProperties } from "../types";
+import type { TransactionStatus } from "./types";
+
+type TransactionRecord = {
+  tx: Transaction | null;
+  phase: TransactionStatus;
+};
+type TransactionHistoryBridge = {
+  onBeforeRecord: (callback: HistoryBeforeRecordListener) => () => void;
+  setEffectiveDeltaResolver: (
+    resolver:
+      | ((
+          delta: HistoryDelta,
+          context: HistoryEffectiveDeltaResolverContext,
+        ) => HistoryDelta)
+      | null,
+  ) => void;
+};
+
+type MutableElementUpdatedProps = Mutable<ElementUpdatedProps>;
+
+const setElementUpdatedOverride = (
+  overrides: MutableElementUpdatedProps,
+  prop: ElementUpdatedPropName,
+  value: unknown,
+) => {
+  (overrides as Record<ElementUpdatedPropName, unknown>)[prop] = value;
+};
+
+/**
+ * Thin factory that holds the app reference and creates Transaction instances.
+ */
+export class TransactionManager {
+  private readonly app: AppClassProperties;
+  /**
+   * Single authoritative lifecycle registry for transactions.
+   *
+   * We retain ended/canceled metadata after the tx object is released because
+   * history markers only persist `txId`; undo/redo still needs to resolve
+   * whether a tx was active or already ended when applying effective deltas.
+   */
+  private readonly transactionRecords = new Map<string, TransactionRecord>();
+  /**
+   * Active transaction ids ordered by most-recent registration first.
+   * This preserves deterministic priority when multiple active txs overlap on
+   * the same element+prop and compete to reserve override markers.
+   */
+  private readonly activeTransactionIdsByPriority: string[] = [];
+  private detachBeforeRecordHook: (() => void) | null = null;
+
+  constructor(app: AppClassProperties) {
+    this.app = app;
+  }
+
+  /**
+   * Binds transaction bookkeeping to history lifecycle hooks.
+   * Call once during app initialization.
+   */
+  attachHistory(history: TransactionHistoryBridge) {
+    this.detachBeforeRecordHook?.();
+    history.setEffectiveDeltaResolver((delta, context) =>
+      this.resolveEffectiveDelta(delta, context),
+    );
+    this.detachBeforeRecordHook = history.onBeforeRecord((delta) =>
+      this.onDurableIncrement(delta),
+    );
+  }
+
+  private removeActiveTransactionId(txId: string) {
+    const txIndex = this.activeTransactionIdsByPriority.indexOf(txId);
+    if (txIndex >= 0) {
+      this.activeTransactionIdsByPriority.splice(txIndex, 1);
+    }
+  }
+
+  private getRequiredTransactionRecord(txId: string): TransactionRecord {
+    const record = this.transactionRecords.get(txId);
+    if (!record) {
+      throw new Error(`Unknown transaction: ${txId}`);
+    }
+
+    return record;
+  }
+
+  registerTransaction(tx: Transaction) {
+    this.transactionRecords.set(tx.id, {
+      tx,
+      phase: "active",
+    });
+    this.activeTransactionIdsByPriority.unshift(tx.id);
+  }
+
+  detachTransactionInstance(txId: string) {
+    const record = this.getRequiredTransactionRecord(txId);
+    record.tx = null;
+    this.removeActiveTransactionId(txId);
+  }
+
+  getStatus(txId: string): TransactionStatus {
+    return this.getRequiredTransactionRecord(txId).phase;
+  }
+
+  private markTransactionFinished(
+    txId: string,
+    phase: Exclude<TransactionStatus, "active">,
+  ): TransactionStatus {
+    const record = this.getRequiredTransactionRecord(txId);
+    if (record.phase !== "active") {
+      return record.phase;
+    }
+
+    record.phase = phase;
+    this.removeActiveTransactionId(txId);
+    return record.phase;
+  }
+
+  markTransactionCommitted(txId: string): TransactionStatus {
+    return this.markTransactionFinished(txId, "committed");
+  }
+
+  markTransactionCanceled(txId: string): TransactionStatus {
+    return this.markTransactionFinished(txId, "canceled");
+  }
+
+  onDurableIncrement(delta: StoreDelta) {
+    if (this.activeTransactionIdsByPriority.length === 0) {
+      return;
+    }
+    if (!hasUpdatedElementEntries(delta)) {
+      return;
+    }
+
+    const txUndoOverrides = this.collectUndoOverrides(delta);
+    if (txUndoOverrides.length === 0) {
+      return;
+    }
+
+    mergeStoreDeltaMarkers(delta, { txUndoOverrides });
+  }
+
+  private collectUndoOverrides(delta: StoreDelta): TxUndoOverride[] {
+    const overrides: TxUndoOverride[] = [];
+    const reservedConsumedKeys = new Set<string>();
+
+    for (const txId of this.activeTransactionIdsByPriority) {
+      const record = this.transactionRecords.get(txId);
+      if (!record || record.phase !== "active" || !record.tx) {
+        continue;
+      }
+
+      const txOverrides = record.tx.collectUndoOverridesForDelta(
+        delta,
+        reservedConsumedKeys,
+      );
+
+      for (const override of txOverrides) {
+        if (reservedConsumedKeys.has(override.consumedKey)) {
+          continue;
+        }
+
+        reservedConsumedKeys.add(override.consumedKey);
+        overrides.push(override);
+      }
+    }
+
+    return overrides;
+  }
+
+  private resolveEffectiveDelta(
+    delta: HistoryDelta,
+    _context: HistoryEffectiveDeltaResolverContext,
+  ): HistoryDelta {
+    const txUndoOverrides = delta.markers?.txUndoOverrides;
+    if (!txUndoOverrides || txUndoOverrides.length === 0) {
+      return delta;
+    }
+
+    const updatedEntries = getUpdatedElementEntries(delta);
+    const insertedOverridesByElement = new Map<
+      string,
+      MutableElementUpdatedProps
+    >();
+
+    for (const override of txUndoOverrides) {
+      if (!this.shouldApplyUndoOverride(override.txId)) {
+        continue;
+      }
+
+      const currentEntry = updatedEntries[override.elementId];
+      if (!currentEntry) {
+        continue;
+      }
+
+      const prop = override.prop as ElementUpdatedPropName;
+      const currentInsertedValue = currentEntry.inserted[prop];
+      if (
+        !isLedgerValueEqual(
+          currentInsertedValue,
+          override.expectedInsertedValue,
+        )
+      ) {
+        // Guard against over-applying once the delta has already evolved.
+        continue;
+      }
+
+      const elementOverrides = insertedOverridesByElement.get(
+        override.elementId,
+      );
+      if (elementOverrides) {
+        setElementUpdatedOverride(
+          elementOverrides,
+          prop,
+          override.preTxBaselineValue,
+        );
+      } else {
+        const nextOverrides: MutableElementUpdatedProps = {};
+        setElementUpdatedOverride(
+          nextOverrides,
+          prop,
+          override.preTxBaselineValue,
+        );
+        insertedOverridesByElement.set(override.elementId, nextOverrides);
+      }
+    }
+
+    if (insertedOverridesByElement.size === 0) {
+      return delta;
+    }
+
+    const nextUpdatedEntries: ElementUpdatedEntryMap = {
+      ...updatedEntries,
+    };
+    for (const [elementId, insertedOverrides] of insertedOverridesByElement) {
+      const currentEntry = updatedEntries[elementId];
+      if (!currentEntry) {
+        continue;
+      }
+
+      nextUpdatedEntries[elementId] = Delta.create(
+        { ...currentEntry.deleted },
+        { ...currentEntry.inserted, ...insertedOverrides },
+      );
+    }
+
+    const effectiveElements = ElementsDelta.create(
+      delta.elements.added,
+      delta.elements.removed,
+      nextUpdatedEntries,
+    );
+
+    return HistoryDelta.create(effectiveElements, delta.appState, {
+      id: delta.id,
+      markers: delta.markers,
+    }) as HistoryDelta;
+  }
+
+  private shouldApplyUndoOverride(txId: string): boolean {
+    const record = this.transactionRecords.get(txId);
+    return !!record && record.phase !== "active";
+  }
+
+  create(): Transaction {
+    return new Transaction(this.app, this);
+  }
+}

packages/excalidraw/transaction/transaction.ts

@@ -0,0 +1,286 @@
+import { randomId } from "@excalidraw/common";
+import {
+  CaptureUpdateAction,
+  newElementWith,
+  type ElementUpdate,
+  type StoreDelta,
+  type TxUndoOverride,
+} from "@excalidraw/element";
+
+import { shallowCopySceneElements } from "./diff";
+import { TransactionLedger } from "./ledger";
+
+import {
+  type AppStateResolver,
+  type AppStateResolverContext,
+  type TransactionElementOfType,
+  type TransactionElementUpdate,
+  type TransactionStatus,
+  type TransactionSummary,
+} from "./types";
+import { TxUndoOverridePlanner } from "./undoOverridePlanner";
+
+import type { TransactionManager } from "./manager";
+import type {
+  AppClassProperties,
+  AppState,
+  ObservedAppState,
+  SceneData,
+} from "../types";
+
+type CommitOptions = {
+  resolveAppState?: AppStateResolver;
+};
+
+/**
+ * A transaction that records mutations via `updateScene(NEVER)` and commits
+ * a single synthetic durable history entry at the end.
+ */
+export class Transaction {
+  public readonly id = `tx-${randomId()}`;
+
+  private readonly app: AppClassProperties;
+  private readonly manager: TransactionManager;
+  private readonly ledger = new TransactionLedger();
+  private readonly undoOverridePlanner = new TxUndoOverridePlanner();
+  private readonly initialAppState: Partial<ObservedAppState>;
+
+  private accumulatedAppState: Record<string, unknown> = {};
+  private cachedSummary: TransactionSummary | null = null;
+
+  constructor(app: AppClassProperties, manager: TransactionManager) {
+    this.app = app;
+    this.manager = manager;
+    this.initialAppState = { ...app.store.snapshot.appState };
+    this.manager.registerTransaction(this);
+  }
+
+  get status(): TransactionStatus {
+    return this.manager.getStatus(this.id);
+  }
+
+  private assertActive(action: string): void {
+    const status = this.status;
+    if (status !== "active") {
+      throw new Error(
+        `Cannot ${action} — transaction ${this.id} is already ${status}.`,
+      );
+    }
+  }
+
+  private closeTransaction() {
+    this.manager.detachTransactionInstance(this.id);
+    this.undoOverridePlanner.clear();
+  }
+
+  public collectUndoOverridesForDelta(
+    delta: StoreDelta,
+    reservedConsumedKeys: Set<string>,
+  ): TxUndoOverride[] {
+    if (this.status !== "active") {
+      return [];
+    }
+
+    const candidates =
+      this.undoOverridePlanner.collectCandidatesForDurableDelta(
+        delta,
+        (elementId) => this.ledger.getEntry(elementId),
+        reservedConsumedKeys,
+      );
+
+    if (candidates.length === 0) {
+      return [];
+    }
+
+    const overrides: TxUndoOverride[] = [];
+    for (const candidate of candidates) {
+      this.undoOverridePlanner.markConsumed(candidate.consumedKey);
+      overrides.push({
+        txId: this.id,
+        ...candidate,
+      });
+    }
+
+    return overrides;
+  }
+
+  updateScene<K extends keyof AppState>(data: {
+    elements?: SceneData["elements"];
+    appState?: Pick<AppState, K> | null;
+  }): void {
+    this.assertActive("updateScene");
+
+    // Snapshot before (shallow copy — replaceAllElements mutates the map in-place)
+    const before = shallowCopySceneElements(
+      this.app.scene.getElementsMapIncludingDeleted(),
+    );
+
+    // Apply through the real updateScene with NEVER.
+    this.app.api.updateScene({
+      elements: data.elements,
+      appState: data.appState,
+      captureUpdate: CaptureUpdateAction.NEVER,
+    });
+
+    // Snapshot after
+    const after = this.app.scene.getElementsMapIncludingDeleted();
+
+    this.undoOverridePlanner.recordStep(before, after);
+
+    // Record element diff into ledger
+    this.ledger.recordStep(before, after);
+
+    // Accumulate appState intent
+    if (data.appState) {
+      this.accumulatedAppState = {
+        ...this.accumulatedAppState,
+        ...(data.appState as Record<string, unknown>),
+      };
+    }
+  }
+
+  /**
+   * Partial element updates convenience API.
+   *
+   * Example:
+   * tx.updateElements({
+   *   elements: [
+   *     { id: "a", type: "rectangle", updates: { strokeColor: "#f00" } },
+   *     { id: "b", type: "rectangle", updates: { x: 10, y: 20 } },
+   *   ],
+   * })
+   */
+  updateElements<K extends keyof AppState>(data: {
+    elements: readonly TransactionElementUpdate[];
+    appState?: Pick<AppState, K> | null;
+  }): void {
+    const updatesById = new Map<string, TransactionElementUpdate>();
+
+    for (const update of data.elements) {
+      updatesById.set(update.id, update);
+    }
+
+    if (updatesById.size === 0) {
+      this.updateScene({ appState: data.appState });
+      return;
+    }
+
+    const nextElements = this.app.scene
+      .getElementsIncludingDeleted()
+      .map((element) => {
+        const update = updatesById.get(element.id);
+        if (!update) {
+          return element;
+        }
+        if (element.type !== update.type) {
+          throw new Error(
+            `Cannot apply tx.updateElements update for "${update.id}": expected "${update.type}", got "${element.type}".`,
+          );
+        }
+
+        type MatchingElement = TransactionElementOfType<typeof update.type>;
+        return newElementWith(
+          element as MatchingElement,
+          update.updates as ElementUpdate<MatchingElement>,
+        );
+      });
+
+    this.updateScene({
+      elements: nextElements,
+      appState: data.appState,
+    });
+  }
+
+  commit(options?: CommitOptions): TransactionSummary {
+    if (this.cachedSummary) {
+      return this.cachedSummary;
+    }
+
+    this.manager.markTransactionCommitted(this.id);
+    let historyCommitted = false;
+    try {
+      historyCommitted = this.hasPendingWork()
+        ? this.commitHistoryEntry(options)
+        : false;
+    } finally {
+      this.closeTransaction();
+    }
+
+    const status = this.status;
+    this.cachedSummary = {
+      id: this.id,
+      status,
+      historyCommitted,
+    };
+    this.ledger.clear();
+    return this.cachedSummary;
+  }
+
+  private hasPendingWork() {
+    return this.ledger.hasEntries() || this.hasAccumulatedAppStateIntent();
+  }
+
+  private hasAccumulatedAppStateIntent() {
+    return Object.keys(this.accumulatedAppState).length > 0;
+  }
+
+  private commitHistoryEntry(options?: CommitOptions) {
+    const liveMap = this.app.scene.getElementsMapIncludingDeleted();
+    const { elementsBefore, elementsAfter } =
+      this.ledger.buildSyntheticSnapshots(liveMap);
+
+    const appStateDelta = this.resolveCommitAppStateDelta(options);
+
+    return this.app.store.commitSyntheticIncrement({
+      logicalBefore: { elements: elementsBefore },
+      logicalAfter: {
+        elements: elementsAfter,
+        appState: appStateDelta,
+      },
+    });
+  }
+
+  private resolveCommitAppStateDelta(
+    options?: CommitOptions,
+  ): Partial<ObservedAppState> | undefined {
+    if (!this.hasAccumulatedAppStateIntent()) {
+      return undefined;
+    }
+
+    if (!options?.resolveAppState) {
+      return this.accumulatedAppState as Partial<ObservedAppState>;
+    }
+
+    const context: AppStateResolverContext = {
+      initial: this.initialAppState,
+      accumulated: this.accumulatedAppState as Partial<ObservedAppState>,
+      live: { ...this.app.store.snapshot.appState },
+    };
+    const resolved = options.resolveAppState(context);
+
+    if (!resolved || Object.keys(resolved).length === 0) {
+      return undefined;
+    }
+    return resolved;
+  }
+
+  cancel(): TransactionSummary {
+    if (this.cachedSummary) {
+      return this.cachedSummary;
+    }
+
+    if (this.status === "active") {
+      this.manager.markTransactionCanceled(this.id);
+    }
+
+    this.closeTransaction();
+    const status = this.status;
+    this.cachedSummary = {
+      id: this.id,
+      status,
+      historyCommitted: false,
+    };
+    this.ledger.clear();
+    return this.cachedSummary;
+  }
+}

packages/excalidraw/transaction/types.ts

@@ -0,0 +1,83 @@
+import type { ElementUpdate } from "@excalidraw/element";
+
+import type {
+  ExcalidrawElement,
+  ExcalidrawNonSelectionElement,
+} from "@excalidraw/element/types";
+
+import type { ObservedAppState } from "../types";
+
+export type ElementPropName = Extract<keyof ExcalidrawElement, string>;
+
+export type TouchedElementProps =
+  | { kind: "all" }
+  | { kind: "partial"; props: Set<ElementPropName> };
+
+export type ElementChange = {
+  id: ExcalidrawElement["id"];
+  before: ExcalidrawElement | null;
+  after: ExcalidrawElement | null;
+  touchedProps: TouchedElementProps;
+};
+
+/** Per-element ledger record captured during a transaction session. */
+export type TransactionLedgerEntry = {
+  baselineElement: ExcalidrawElement | null;
+  targetElement: ExcalidrawElement | null;
+  touchedProps: TouchedElementProps;
+};
+
+/** Lifecycle state of a transaction. */
+export type TransactionStatus = "active" | "committed" | "canceled";
+
+/** Per-element partial patch used by tx.updateElements(). */
+export type TransactionUpdatableElementType =
+  ExcalidrawNonSelectionElement["type"];
+
+export type TransactionElementOfType<
+  TType extends TransactionUpdatableElementType,
+> = Extract<ExcalidrawNonSelectionElement, { type: TType }>;
+
+export type TransactionElementUpdate<
+  TType extends TransactionUpdatableElementType = TransactionUpdatableElementType,
+> = TType extends TransactionUpdatableElementType
+  ? {
+      id: ExcalidrawElement["id"];
+      type: TType;
+      updates: ElementUpdate<TransactionElementOfType<TType>>;
+    }
+  : never;
+
+/** Final summary returned when a transaction is committed or canceled. */
+export type TransactionSummary = {
+  id: string;
+  status: TransactionStatus;
+  historyCommitted: boolean;
+};
+
+/** Three-way appState context provided to the resolver at commit time. */
+export type AppStateResolverContext = {
+  /** AppState snapshot captured when the transaction was created. */
+  initial: Partial<ObservedAppState>;
+  /** Merged appState intent from all updateScene calls during the transaction. */
+  accumulated: Partial<ObservedAppState>;
+  /** Current live appState at commit time. */
+  live: Partial<ObservedAppState>;
+};
+
+/**
+ * Caller-provided resolver that determines which appState changes are
+ * recorded in the history entry.
+ *
+ * Unlike elements — where per-property conflict detection works because
+ * element properties are largely independent — appState keys are often
+ * interdependent (e.g. selectedElementIds ↔ selectedGroupIds must stay
+ * consistent). The correct merge strategy therefore depends on the
+ * caller's semantic context, not on a generic policy.
+ *
+ * Return the appState delta to record in history, or undefined to skip
+ * appState changes entirely.
+ */
+export type AppStateResolver = (
+  context: AppStateResolverContext,
+) => Partial<ObservedAppState> | undefined;

packages/excalidraw/transaction/undoOverridePlanner.ts

@@ -0,0 +1,283 @@
+import type { StoreDelta, TxUndoOverride } from "@excalidraw/element";
+
+import type { ExcalidrawElement } from "@excalidraw/element/types";
+
+import {
+  TX_UNDO_OVERRIDE_IGNORED_PROPS,
+  collectElementChanges,
+  getElementProp,
+  getElementPropEntries,
+  getUpdatedElementEntries,
+  hasTouchedProp,
+  isPartialTouchedProps,
+  isLedgerValueEqual,
+  serializeConsumedPropKey,
+  serializeIntermediateValue,
+  touchesWholeElement,
+  type ElementUpdatedEntry,
+} from "./diff";
+
+import type {
+  ElementPropName,
+  TouchedElementProps,
+  TransactionLedgerEntry,
+} from "./types";
+
+type TxUndoOverrideCandidate = Omit<TxUndoOverride, "txId">;
+
+/**
+ * Per-element-prop history of tx intermediate values.
+ *
+ * We keep:
+ * - the full sequence for exact deep-equality fallback
+ * - a serialized signature set for fast negative lookups
+ * - the latest value for the most common positive lookup path
+ */
+class TxIntermediateValueHistory {
+  private readonly values: unknown[] = [];
+  private readonly signatures = new Set<string>();
+  private latestValue: unknown;
+  private hasLatestValue = false;
+
+  /** Appends a new intermediate value, skipping consecutive duplicates. */
+  add(value: unknown) {
+    if (this.hasLatestValue && isLedgerValueEqual(this.latestValue, value)) {
+      return;
+    }
+
+    this.values.push(value);
+    this.signatures.add(serializeIntermediateValue(value));
+    this.latestValue = value;
+    this.hasLatestValue = true;
+  }
+
+  /** Returns whether the candidate appeared in this tx prop history. */
+  contains(candidate: unknown) {
+    const candidateSignature = serializeIntermediateValue(candidate);
+    if (!this.signatures.has(candidateSignature)) {
+      return false;
+    }
+
+    if (
+      this.hasLatestValue &&
+      isLedgerValueEqual(this.latestValue, candidate)
+    ) {
+      return true;
+    }
+
+    return this.values.some((value) => isLedgerValueEqual(value, candidate));
+  }
+}
+
+/**
+ * Tracks tx intermediate values and computes undo baseline override markers
+ * for durable user deltas recorded while tx is active.
+ *
+ * High-level flow:
+ * 1. `recordStep()` observes every in-tx scene mutation and records the
+ *    intermediate value reached by each touched element prop.
+ * 2. When a durable user delta is about to be recorded,
+ *    `collectCandidatesForDurableDelta()` checks whether that delta's
+ *    deleted-baseline values match any tx intermediate value.
+ * 3. If they do, we emit override candidates so undo can restore the pre-tx
+ *    baseline once the tx has ended.
+ * 4. `markConsumed()` ensures only the first polluted durable entry for a
+ *    given element+prop gets patched; later user actions keep their own
+ *    action-local undo baseline.
+ */
+export class TxUndoOverridePlanner {
+  private readonly intermediateValuesByElementProp = new Map<
+    string,
+    Map<ElementPropName, TxIntermediateValueHistory>
+  >();
+  private readonly consumedOverridePropKeys = new Set<string>();
+
+  /** Resets planner state when the transaction finishes. */
+  clear() {
+    this.consumedOverridePropKeys.clear();
+    this.intermediateValuesByElementProp.clear();
+  }
+
+  /** Records per-prop intermediate values reached by one in-tx scene step. */
+  recordStep(
+    before: ReadonlyMap<string, ExcalidrawElement>,
+    after: ReadonlyMap<string, ExcalidrawElement>,
+  ) {
+    for (const change of collectElementChanges(before, after)) {
+      const { id: elementId, after: afterElement, touchedProps } = change;
+
+      if (!afterElement || !isPartialTouchedProps(touchedProps)) {
+        continue;
+      }
+
+      for (const prop of touchedProps.props) {
+        this.recordIntermediateValue(
+          elementId,
+          prop,
+          getElementProp(afterElement, prop),
+        );
+      }
+    }
+  }
+
+  /**
+   * Collects override candidates for one durable user delta recorded while the
+   * tx is active.
+   */
+  collectCandidatesForDurableDelta(
+    delta: StoreDelta,
+    getLedgerEntry: (elementId: string) => TransactionLedgerEntry | undefined,
+    reservedConsumedKeys: Set<string>,
+  ): TxUndoOverrideCandidate[] {
+    const candidates: TxUndoOverrideCandidate[] = [];
+
+    for (const [elementId, deltaEntry] of Object.entries(
+      getUpdatedElementEntries(delta),
+    )) {
+      const ledgerEntry = getLedgerEntry(elementId);
+      if (!ledgerEntry) {
+        continue;
+      }
+
+      const elementCandidates = this.collectCandidatesForElement(
+        elementId,
+        deltaEntry,
+        ledgerEntry,
+        reservedConsumedKeys,
+      );
+      if (elementCandidates.length > 0) {
+        candidates.push(...elementCandidates);
+      }
+    }
+
+    return candidates;
+  }
+
+  /** Evaluates one element's updated entry against the tx ledger snapshot. */
+  private collectCandidatesForElement(
+    elementId: string,
+    deltaEntry: ElementUpdatedEntry,
+    ledgerEntry: TransactionLedgerEntry,
+    reservedConsumedKeys: Set<string>,
+  ): TxUndoOverrideCandidate[] {
+    const { baselineElement, touchedProps } = ledgerEntry;
+    if (!baselineElement || touchesWholeElement(touchedProps)) {
+      return [];
+    }
+
+    const candidates: TxUndoOverrideCandidate[] = [];
+    for (const [prop, deletedValue] of getElementPropEntries(
+      deltaEntry.deleted,
+    )) {
+      const candidate = this.createCandidateForProp({
+        elementId,
+        prop,
+        deletedValue,
+        baselineElement,
+        touchedProps,
+        reservedConsumedKeys,
+      });
+      if (candidate) {
+        candidates.push(candidate);
+      }
+    }
+
+    return candidates;
+  }
+
+  /**
+   * Returns an override candidate for one element+prop when the durable delta's
+   * deleted baseline was polluted by a tx intermediate value.
+   */
+  private createCandidateForProp(args: {
+    elementId: string;
+    prop: ElementPropName;
+    deletedValue: unknown;
+    baselineElement: ExcalidrawElement;
+    touchedProps: TouchedElementProps;
+    reservedConsumedKeys: Set<string>;
+  }): TxUndoOverrideCandidate | null {
+    const { elementId, prop, deletedValue, baselineElement, touchedProps } =
+      args;
+
+    if (
+      TX_UNDO_OVERRIDE_IGNORED_PROPS.has(prop) ||
+      !hasTouchedProp(touchedProps, prop)
+    ) {
+      return null;
+    }
+
+    const consumedPropKey = serializeConsumedPropKey(elementId, prop);
+    // Override only the first polluted user entry for this element+prop.
+    // Later user actions should keep action-local undo baselines.
+    if (
+      this.consumedOverridePropKeys.has(consumedPropKey) ||
+      args.reservedConsumedKeys.has(consumedPropKey)
+    ) {
+      return null;
+    }
+
+    if (!this.matchesIntermediateValue(elementId, prop, deletedValue)) {
+      return null;
+    }
+
+    return {
+      elementId,
+      prop,
+      expectedInsertedValue: deletedValue,
+      preTxBaselineValue: getElementProp(baselineElement, prop),
+      consumedKey: consumedPropKey,
+    };
+  }
+
+  /** Marks an element+prop override as consumed by an earlier durable entry. */
+  markConsumed(consumedPropKey: string) {
+    this.consumedOverridePropKeys.add(consumedPropKey);
+  }
+
+  /** Returns the per-prop history map for one element, creating it if needed. */
+  private getOrCreatePropValues(elementId: string) {
+    const existing = this.intermediateValuesByElementProp.get(elementId);
+    if (existing) {
+      return existing;
+    }
+
+    const created = new Map<ElementPropName, TxIntermediateValueHistory>();
+    this.intermediateValuesByElementProp.set(elementId, created);
+    return created;
+  }
+
+  /** Appends one observed intermediate value for an element prop. */
+  private recordIntermediateValue(
+    elementId: string,
+    prop: ElementPropName,
+    value: unknown,
+  ) {
+    const propValues = this.getOrCreatePropValues(elementId);
+    const history = propValues.get(prop);
+    if (history) {
+      history.add(value);
+      return;
+    }
+
+    const nextHistory = new TxIntermediateValueHistory();
+    nextHistory.add(value);
+    propValues.set(prop, nextHistory);
+  }
+
+  /** Checks whether a durable delta baseline matches any tx intermediate value. */
+  private matchesIntermediateValue(
+    elementId: string,
+    prop: ElementPropName,
+    candidate: unknown,
+  ) {
+    const history = this.intermediateValuesByElementProp
+      .get(elementId)
+      ?.get(prop);
+    if (!history) {
+      return false;
+    }
+
+    return history.contains(candidate);
+  }
+}

packages/excalidraw/types.ts

@@ -454,7 +454,6 @@ export interface AppState {
   userToFollow: UserToFollow | null;
   /** the socket ids of the users following the current user */
   followedBy: Set<SocketId>;
-  scrollConstraints: ScrollConstraints | null;
 
   /** image cropping */
   isCropping: boolean;
@@ -547,8 +546,6 @@ export type ExcalidrawInitialDataState = Merge<
   ImportedDataState,
   {
     libraryItems?: MaybePromise<Required<ImportedDataState>["libraryItems"]>;
-    scrollX?: number;
-    scrollY?: number;
   }
 >;
 
@@ -665,7 +662,6 @@ export interface ExcalidrawProps {
   onScrollChange?: (scrollX: number, scrollY: number, zoom: Zoom) => void;
   onUserFollow?: (payload: OnUserFollowedPayload) => void;
   children?: React.ReactNode;
-  scrollConstraints?: AppState["scrollConstraints"];
   validateEmbeddable?:
     | boolean
     | string[]
@@ -800,6 +796,9 @@ export type AppClassProperties = {
   files: BinaryFiles;
   editorInterface: App["editorInterface"];
   scene: App["scene"];
+  store: App["store"];
+  transactionManager: App["transactionManager"];
+  createTransaction: App["createTransaction"];
   syncActionResult: App["syncActionResult"];
   fonts: App["fonts"];
   pasteFromClipboard: App["pasteFromClipboard"];
@@ -992,8 +991,6 @@ export interface ExcalidrawImperativeAPI {
   ) => UnsubscribeCallback;
   onStateChange: InstanceType<typeof App>["onStateChange"];
   onEvent: InstanceType<typeof App>["onEvent"];
-  app: InstanceType<typeof App>;
-  setScrollConstraints: InstanceType<typeof App>["setScrollConstraints"];
 }
 
 export type FrameNameBounds = {
@@ -1060,69 +1057,3 @@ export type Offsets = Partial<{
   bottom: number;
   left: number;
 }>;
-
-export type ScrollConstraints = {
-  x: number;
-  y: number;
-  width: number;
-  height: number;
-  animateOnNextUpdate?: boolean;
-  /**
-   * A factor that determines the minimum zoom level that should fit the
-   * constrained area into the viewport.
-   */
-  viewportZoomFactor?: number;
-  /**
-   * If true, the user will not be able to zoom out beyond the scroll
-   * constraints (taking into account the viewportZoomFactor).
-   */
-  lockZoom?: boolean;
-  /**
-   * <0-1> - how much can you scroll beyond the constrained area within the
-   * timeout window. Note you will still be snapped back to the constrained area
-   * after the timeout.
-   */
-  overscrollAllowance?: number;
-};
-
-/**
- * Optional scroll constraint settings derived from the final viewport computed
- * by `scrollToContent()`.
- */
-export type ScrollToContentLockOptions = {
-  lockZoom?: boolean;
-  overscrollAllowance?: number;
-  viewportZoomFactor?: number;
-};
-
-export type ScrollToContentOptions =
-  | ({
-      fitToContent?: boolean;
-      fitToViewport?: never;
-      viewportZoomFactor?: number;
-      animate?: boolean;
-      duration?: number;
-      scrollLock?: boolean | ScrollToContentLockOptions;
-    } & {
-      minZoom?: number;
-      maxZoom?: number;
-      canvasOffsets?: Offsets;
-    })
-  | ({
-      fitToContent?: never;
-      fitToViewport?: boolean;
-      viewportZoomFactor?: number;
-      animate?: boolean;
-      duration?: number;
-      scrollLock?: boolean | ScrollToContentLockOptions;
-    } & {
-      minZoom?: number;
-      maxZoom?: number;
-      canvasOffsets?: Offsets;
-    });
-
-export type AnimateTranslateCanvasValues = {
-  scrollX: AppState["scrollX"];
-  scrollY: AppState["scrollY"];
-  zoom: AppState["zoom"]["value"];
-};

packages/utils/tests/__snapshots__/export.test.ts.snap

@@ -85,7 +85,6 @@ exports[`exportToSvg > with default arguments 1`] = `
   },
   "previousSelectedElementIds": {},
   "resizingElement": null,
-  "scrollConstraints": null,
   "scrollX": 0,
   "scrollY": 0,
   "scrolledOutside": false,

vercel.json

@@ -1,4 +1,5 @@
 {
+  "public": true,
   "headers": [
     {
       "source": "/(.*)",