13.5.5

fix crash when the walker didn't match because n will be null

README.md

@@ -698,7 +698,7 @@ Y.applyUpdate(ydoc2, state1)
 This example shows how to sync two clients with the minimal amount of exchanged
 data by computing only the differences using the state vector of the remote
 client. Syncing clients using the state vector requires another roundtrip, but
-can safe a lot of bandwidth.
+can save a lot of bandwidth.
 
 ```js
 const stateVector1 = Y.encodeStateVector(ydoc1)

package-lock.json

@@ -1,6 +1,6 @@
 {
   "name": "yjs",
-  "version": "13.5.3",
+  "version": "13.5.5",
   "lockfileVersion": 1,
   "requires": true,
   "dependencies": {

package.json

@@ -1,6 +1,6 @@
 {
   "name": "yjs",
-  "version": "13.5.3",
+  "version": "13.5.5",
   "description": "Shared Editing Library",
   "main": "./dist/yjs.cjs",
   "module": "./dist/yjs.mjs",

src/types/YText.js

@@ -815,6 +815,7 @@ export class YText extends AbstractType {
     super._callObserver(transaction, parentSubs)
     const event = new YTextEvent(this, transaction, parentSubs)
     const doc = transaction.doc
+    callTypeObservers(this, transaction, event)
     // If a remote change happened, we try to cleanup potential formatting duplicates.
     if (!transaction.local) {
       // check if another formatting item was inserted
@@ -863,7 +864,6 @@ export class YText extends AbstractType {
         }
       })
     }
-    callTypeObservers(this, transaction, event)
   }
 
   /**

src/types/YXmlFragment.js

@@ -83,7 +83,7 @@ export class YXmlTreeWalker {
      * @type {Item|null}
      */
     let n = this._currentNode
-    let type = /** @type {any} */ (n.content).type
+    let type = n && n.content && /** @type {any} */ (n.content).type
     if (n !== null && (!this._firstCall || n.deleted || !this._filter(type))) { // if first call, we check if we can use the first item
       do {
         type = /** @type {any} */ (n.content).type

src/utils/UndoManager.js

@@ -99,7 +99,7 @@ const popStackItem = (undoManager, stack, eventType) => {
           performedChange = true
         }
       }
-      result = stackItem
+      result = performedChange ? stackItem : null
     }
     transaction.changed.forEach((subProps, type) => {
       // destroy search marker if necessary

tests/undo-redo.tests.js

@@ -270,3 +270,34 @@ export const testUndoDeleteFilter = tc => {
   array0.get(0)
   t.assert(Array.from(array0.get(0).keys()).length === 1)
 }
+
+/**
+ * This issue has been reported in https://discuss.yjs.dev/t/undomanager-with-external-updates/454/6
+ * @param {t.TestCase} tc
+ */
+export const testUndoUntilChangePerformed = tc => {
+  const doc = new Y.Doc()
+  const doc2 = new Y.Doc()
+  doc.on('update', update => Y.applyUpdate(doc2, update))
+  doc2.on('update', update => Y.applyUpdate(doc, update))
+
+  const yArray = doc.getArray('array')
+  const yArray2 = doc2.getArray('array')
+  const yMap = new Y.Map()
+  yMap.set('hello', 'world')
+  yArray.push([yMap])
+  const yMap2 = new Y.Map()
+  yMap2.set('key', 'value')
+  yArray.push([yMap2])
+
+  const undoManager = new Y.UndoManager([yArray], { trackedOrigins: new Set([doc.clientID]) })
+  const undoManager2 = new Y.UndoManager([doc2.get('array')], { trackedOrigins: new Set([doc2.clientID]) })
+
+  Y.transact(doc, () => yMap2.set('key', 'value modified'), doc.clientID)
+  undoManager.stopCapturing()
+  Y.transact(doc, () => yMap.set('hello', 'world modified'), doc.clientID)
+  Y.transact(doc2, () => yArray2.delete(0), doc2.clientID)
+  undoManager2.undo()
+  undoManager.undo()
+  t.compareStrings(yMap2.get('key'), 'value')
+}

tests/y-text.tests.js

@@ -5,6 +5,23 @@ import * as math from 'lib0/math.js'
 
 const { init, compare } = Y
 
+/**
+ * @param {t.TestCase} tc
+ */
+export const testDeltaAfterConcurrentFormatting = tc => {
+  const { text0, text1, testConnector } = init(tc, { users: 2 })
+  text0.insert(0, 'abcde')
+  testConnector.flushAllMessages()
+  text0.format(0, 3, { bold: true })
+  text1.format(2, 2, { bold: true })
+  let delta = null
+  text1.observe(event => {
+    delta = event.delta
+  })
+  testConnector.flushAllMessages()
+  t.compare(delta, [])
+}
+
 /**
  * @param {t.TestCase} tc
  */