13.5.4

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

README.md

@@ -320,6 +320,8 @@ or any of its children.
   <dl>
     <b><code>parent:Y.AbstractType|null</code></b>
     <dd></dd>
+    <b><code>size: number</code></b>
+    <dd>Total number of key/value pairs.</dd>
     <b><code>get(key:string):object|boolean|string|number|Uint8Array|Y.Type</code></b>
     <dd></dd>
     <b><code>set(key:string, value:object|boolean|string|number|Uint8Array|Y.Type)</code></b>
@@ -410,7 +412,7 @@ YTextEvents compute changes as deltas.
     <dd></dd>
     <b><code>format(index:number, length:number, formattingAttributes:Object&lt;string,string&gt;)</code></b>
     <dd>Assign formatting attributes to a range in the text</dd>
-    <b><code>applyDelta(delta, opts:Object&lt;string,any&gt;)</code></b>
+    <b><code>applyDelta(delta: Delta, opts:Object&lt;string,any&gt;)</code></b>
     <dd>
         See <a href="https://quilljs.com/docs/delta/">Quill Delta</a>
         Can set options for preventing remove ending newLines, default is true.
@@ -483,6 +485,8 @@ or any of its children.
     <dd>Get the XML serialization of all descendants.</dd>
     <b><code>toJSON():string</code></b>
     <dd>See <code>toString</code>.</dd>
+    <b><code>createTreeWalker(filter: function(AbstractType&lt;any&gt;):boolean):Iterable</code></b>
+    <dd>Create an Iterable that walks through the children.</dd>
     <b><code>observe(function(YXmlEvent, Transaction):void)</code></b>
     <dd>
 Adds an event listener to this type that will be called synchronously every time
@@ -540,7 +544,7 @@ content and be actually XML compliant.
     <dd></dd>
     <b><code>getAttribute(attributeName:string):string</code></b>
     <dd></dd>
-    <b><code>getAttributes(attributeName:string):Object&lt;string,string&gt;</code></b>
+    <b><code>getAttributes():Object&lt;string,string&gt;</code></b>
     <dd></dd>
     <b><code>get(i:number):Y.XmlElement|Y.XmlText</code></b>
     <dd>Retrieve the i-th element.</dd>
@@ -609,7 +613,10 @@ parameter that is stored on <code>transaction.origin</code> and
   </dd>
   <b><code>toJSON():any</code></b>
   <dd>
-Converts the entire document into a js object, recursively traversing each yjs type.
+Deprecated: It is recommended to call toJSON directly on the shared types.
+Converts the entire document into a js object, recursively traversing each yjs
+type. Doesn't log types that have not been defined (using
+<code>ydoc.getType(..)</code>).
   </dd>
   <b><code>get(string, Y.[TypeClass]):[Type]</code></b>
   <dd>Define a shared type.</dd>
@@ -691,7 +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": "13.5.1",
+  "version": "13.5.4",
   "lockfileVersion": 1,
   "requires": true,
   "dependencies": {

package.json

@@ -1,10 +1,9 @@
 {
   "name": "yjs",
-  "version": "13.5.1",
+  "version": "13.5.4",
   "description": "Shared Editing Library",
   "main": "./dist/yjs.cjs",
   "module": "./dist/yjs.mjs",
-  "unpkg": "./dist/yjs.mjs",
   "types": "./dist/src/index.d.ts",
   "sideEffects": false,
   "funding": {
@@ -12,14 +11,14 @@
     "url": "https://github.com/sponsors/dmonad"
   },
   "scripts": {
-    "test": "npm run dist && node ./dist/tests.cjs --repitition-time 50",
+    "test": "npm run dist && node ./dist/tests.cjs --repetition-time 50",
-    "test-extensive": "npm run lint && npm run dist && node ./dist/tests.cjs --production --repitition-time 10000",
+    "test-extensive": "npm run lint && npm run dist && node ./dist/tests.cjs --production --repetition-time 10000",
     "dist": "rm -rf dist && rollup -c && tsc",
     "watch": "rollup -wc",
     "lint": "markdownlint README.md && standard && tsc",
     "docs": "rm -rf docs; jsdoc --configure ./.jsdoc.json --verbose --readme ./README.md --package ./package.json || true",
     "serve-docs": "npm run docs && http-server ./docs/",
-    "preversion": "npm run lint && PRODUCTION=1 npm run dist && npm run docs && node ./dist/tests.cjs --repitition-time 1000 && test -e dist/src/index.d.ts && test -e dist/yjs.cjs && test -e dist/yjs.cjs",
+    "preversion": "npm run lint && PRODUCTION=1 npm run dist && npm run docs && node ./dist/tests.cjs --repetition-time 1000 && test -e dist/src/index.d.ts && test -e dist/yjs.cjs && test -e dist/yjs.cjs",
     "debug": "concurrently 'http-server -o test.html' 'npm run watch'",
     "trace-deopt": "clear && rollup -c  && node --trace-deopt dist/test.cjs",
     "trace-opt": "clear && rollup -c  && node --trace-opt dist/test.cjs",
@@ -31,7 +30,8 @@
       "require": "./dist/yjs.cjs"
     },
     "./src/index.js": "./src/index.js",
-    "./tests/testHelper.js": "./tests/testHelper.js"
+    "./tests/testHelper.js": "./tests/testHelper.js",
+    "./package.json": "./package.json"
   },
   "files": [
     "dist/yjs.*",

src/types/YText.js

@@ -502,14 +502,6 @@ const deleteText = (transaction, currPos, length) => {
   * @typedef {Object} TextAttributes
   */
 
-/**
- * @typedef {Object} DeltaItem
- * @property {number|undefined} DeltaItem.delete
- * @property {number|undefined} DeltaItem.retain
- * @property {string|undefined} DeltaItem.insert
- * @property {Object<string,any>} DeltaItem.attributes
- */
-
 /**
  * Event that describes the changes on a YText type.
  */
@@ -521,10 +513,6 @@ export class YTextEvent extends YEvent {
    */
   constructor (ytext, transaction, subs) {
     super(ytext, transaction)
-    /**
-     * @type {Array<DeltaItem>|null}
-     */
-    this._delta = null
     /**
      * Whether the children changed.
      * @type {Boolean}
@@ -545,20 +533,41 @@ export class YTextEvent extends YEvent {
     })
   }
 
+  /**
+   * @type {{added:Set<Item>,deleted:Set<Item>,keys:Map<string,{action:'add'|'update'|'delete',oldValue:any}>,delta:Array<{insert?:Array<any>|string, delete?:number, retain?:number}>}}
+   */
+  get changes () {
+    if (this._changes === null) {
+      /**
+       * @type {{added:Set<Item>,deleted:Set<Item>,keys:Map<string,{action:'add'|'update'|'delete',oldValue:any}>,delta:Array<{insert?:Array<any>|string, delete?:number, retain?:number}>}}
+       */
+      const changes = {
+        keys: this.keys,
+        delta: this.delta,
+        added: new Set(),
+        deleted: new Set()
+      }
+      this._changes = changes
+    }
+    return /** @type {any} */ (this._changes)
+  }
+
   /**
    * Compute the changes in the delta format.
    * A {@link https://quilljs.com/docs/delta/|Quill Delta}) that represents the changes on the document.
    *
-   * @type {Array<DeltaItem>}
+   * @type {Array<{insert?:string, delete?:number, retain?:number, attributes?: Object<string,any>}>}
    *
    * @public
    */
   get delta () {
     if (this._delta === null) {
       const y = /** @type {Doc} */ (this.target.doc)
-      this._delta = []
+      /**
+       * @type {Array<{insert?:string, delete?:number, retain?:number, attributes?: Object<string,any>}>}
+       */
+      const delta = []
       transact(y, transaction => {
-        const delta = /** @type {Array<DeltaItem>} */ (this._delta)
         const currentAttributes = new Map() // saves all current attributes for insert
         const oldAttributes = new Map()
         let item = this.target._start
@@ -728,8 +737,9 @@ export class YTextEvent extends YEvent {
           }
         }
       })
+      this._delta = delta
     }
-    return this._delta
+    return /** @type {any} */ (this._delta)
   }
 }
 

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

@@ -5,11 +5,11 @@ import {
   transact,
   createID,
   redoItem,
-  iterateStructs,
   isParentOf,
   followRedone,
   getItemCleanStart,
-  getState,
+  isDeleted,
+  addToDeleteSet,
   Transaction, Doc, Item, GC, DeleteSet, AbstractType, YEvent // eslint-disable-line
 } from '../internals.js'
 
@@ -18,14 +18,12 @@ import { Observable } from 'lib0/observable.js'
 
 class StackItem {
   /**
-   * @param {DeleteSet} ds
+   * @param {DeleteSet} deletions
-   * @param {Map<number,number>} beforeState
+   * @param {DeleteSet} insertions
-   * @param {Map<number,number>} afterState
    */
-  constructor (ds, beforeState, afterState) {
+  constructor (deletions, insertions) {
-    this.ds = ds
+    this.insertions = insertions
-    this.beforeState = beforeState
+    this.deletions = deletions
-    this.afterState = afterState
     /**
      * Use this to save and restore metadata like selection range
      */
@@ -65,48 +63,26 @@ const popStackItem = (undoManager, stack, eventType) => {
        */
       const itemsToDelete = []
       let performedChange = false
-      stackItem.afterState.forEach((endClock, client) => {
+      iterateDeletedStructs(transaction, stackItem.insertions, struct => {
-        const startClock = stackItem.beforeState.get(client) || 0
+        if (struct instanceof Item) {
-        const len = endClock - startClock
+          if (struct.redone !== null) {
-        // @todo iterateStructs should not need the structs parameter
+            let { item, diff } = followRedone(store, struct.id)
-        const structs = /** @type {Array<GC|Item>} */ (store.clients.get(client))
+            if (diff > 0) {
-        if (startClock !== endClock) {
+              item = getItemCleanStart(transaction, createID(item.id.client, item.id.clock + diff))
-          // make sure structs don't overlap with the range of created operations [stackItem.start, stackItem.start + stackItem.end)
-          // this must be executed before deleted structs are iterated.
-          getItemCleanStart(transaction, createID(client, startClock))
-          if (endClock < getState(doc.store, client)) {
-            getItemCleanStart(transaction, createID(client, endClock))
-          }
-          iterateStructs(transaction, structs, startClock, len, struct => {
-            if (struct instanceof Item) {
-              if (struct.redone !== null) {
-                let { item, diff } = followRedone(store, struct.id)
-                if (diff > 0) {
-                  item = getItemCleanStart(transaction, createID(item.id.client, item.id.clock + diff))
-                }
-                if (item.length > len) {
-                  getItemCleanStart(transaction, createID(item.id.client, endClock))
-                }
-                struct = item
-              }
-              if (!struct.deleted && scope.some(type => isParentOf(type, /** @type {Item} */ (struct)))) {
-                itemsToDelete.push(struct)
-              }
             }
-          })
+            struct = item
+          }
+          if (!struct.deleted && scope.some(type => isParentOf(type, /** @type {Item} */ (struct)))) {
+            itemsToDelete.push(struct)
+          }
         }
       })
-      iterateDeletedStructs(transaction, stackItem.ds, struct => {
+      iterateDeletedStructs(transaction, stackItem.deletions, struct => {
-        const id = struct.id
-        const clock = id.clock
-        const client = id.client
-        const startClock = stackItem.beforeState.get(client) || 0
-        const endClock = stackItem.afterState.get(client) || 0
         if (
           struct instanceof Item &&
           scope.some(type => isParentOf(type, struct)) &&
-          // Never redo structs in [stackItem.start, stackItem.start + stackItem.end) because they were created and deleted in the same capture interval.
+          // Never redo structs in stackItem.insertions because they were created and deleted in the same capture interval.
-          !(clock >= startClock && clock < endClock)
+          !isDeleted(stackItem.insertions, struct.id)
         ) {
           itemsToRedo.add(struct)
         }
@@ -201,17 +177,23 @@ export class UndoManager extends Observable {
         // neither undoing nor redoing: delete redoStack
         this.redoStack = []
       }
-      const beforeState = transaction.beforeState
+      const insertions = new DeleteSet()
-      const afterState = transaction.afterState
+      transaction.afterState.forEach((endClock, client) => {
+        const startClock = transaction.beforeState.get(client) || 0
+        const len = endClock - startClock
+        if (len > 0) {
+          addToDeleteSet(insertions, client, startClock, len)
+        }
+      })
       const now = time.getUnixTime()
       if (now - this.lastChange < captureTimeout && stack.length > 0 && !undoing && !redoing) {
         // append change to last stack op
         const lastOp = stack[stack.length - 1]
-        lastOp.ds = mergeDeleteSets([lastOp.ds, transaction.deleteSet])
+        lastOp.deletions = mergeDeleteSets([lastOp.deletions, transaction.deleteSet])
-        lastOp.afterState = afterState
+        lastOp.insertions = mergeDeleteSets([lastOp.insertions, insertions])
       } else {
         // create a new stack op
-        stack.push(new StackItem(transaction.deleteSet, beforeState, afterState))
+        stack.push(new StackItem(transaction.deleteSet, insertions))
       }
       if (!undoing && !redoing) {
         this.lastChange = now
@@ -232,7 +214,7 @@ export class UndoManager extends Observable {
        * @param {StackItem} stackItem
        */
       const clearItem = stackItem => {
-        iterateDeletedStructs(transaction, stackItem.ds, item => {
+        iterateDeletedStructs(transaction, stackItem.deletions, item => {
           if (item instanceof Item && this.scope.some(type => isParentOf(type, item))) {
             keepItem(item, false)
           }

src/utils/YEvent.js

@@ -35,6 +35,14 @@ export class YEvent {
      * @type {Object|null}
      */
     this._changes = null
+    /**
+     * @type {null | Map<string, { action: 'add' | 'update' | 'delete', oldValue: any, newValue: any }>}
+     */
+    this._keys = null
+    /**
+     * @type {null | Array<{ insert?: string | Array<any>, retain?: number, delete?: number, attributes?: Object<string, any> }>}
+     */
+    this._delta = null
   }
 
   /**
@@ -67,6 +75,66 @@ export class YEvent {
     return isDeleted(this.transaction.deleteSet, struct.id)
   }
 
+  /**
+   * @type {Map<string, { action: 'add' | 'update' | 'delete', oldValue: any, newValue: any }>}
+   */
+  get keys () {
+    if (this._keys === null) {
+      const keys = new Map()
+      const target = this.target
+      const changed = /** @type Set<string|null> */ (this.transaction.changed.get(target))
+      changed.forEach(key => {
+        if (key !== null) {
+          const item = /** @type {Item} */ (target._map.get(key))
+          /**
+           * @type {'delete' | 'add' | 'update'}
+           */
+          let action
+          let oldValue
+          if (this.adds(item)) {
+            let prev = item.left
+            while (prev !== null && this.adds(prev)) {
+              prev = prev.left
+            }
+            if (this.deletes(item)) {
+              if (prev !== null && this.deletes(prev)) {
+                action = 'delete'
+                oldValue = array.last(prev.content.getContent())
+              } else {
+                return
+              }
+            } else {
+              if (prev !== null && this.deletes(prev)) {
+                action = 'update'
+                oldValue = array.last(prev.content.getContent())
+              } else {
+                action = 'add'
+                oldValue = undefined
+              }
+            }
+          } else {
+            if (this.deletes(item)) {
+              action = 'delete'
+              oldValue = array.last(/** @type {Item} */ item.content.getContent())
+            } else {
+              return // nop
+            }
+          }
+          keys.set(key, { action, oldValue })
+        }
+      })
+      this._keys = keys
+    }
+    return this._keys
+  }
+
+  /**
+   * @type {Array<{insert?: string | Array<any>, retain?: number, delete?: number, attributes?: Object<string, any>}>}
+   */
+  get delta () {
+    return this.changes.delta
+  }
+
   /**
    * Check if a struct is added by this event.
    *
@@ -80,7 +148,7 @@ export class YEvent {
   }
 
   /**
-   * @return {{added:Set<Item>,deleted:Set<Item>,keys:Map<string,{action:'add'|'update'|'delete',oldValue:any}>,delta:Array<{insert:Array<any>}|{delete:number}|{retain:number}>}}
+   * @type {{added:Set<Item>,deleted:Set<Item>,keys:Map<string,{action:'add'|'update'|'delete',oldValue:any}>,delta:Array<{insert?:Array<any>|string, delete?:number, retain?:number}>}}
    */
   get changes () {
     let changes = this._changes
@@ -92,12 +160,11 @@ export class YEvent {
        * @type {Array<{insert:Array<any>}|{delete:number}|{retain:number}>}
        */
       const delta = []
-      /**
-       * @type {Map<string,{ action: 'add' | 'update' | 'delete', oldValue: any}>}
-       */
-      const keys = new Map()
       changes = {
-        added, deleted, delta, keys
+        added,
+        deleted,
+        delta,
+        keys: this.keys
       }
       const changed = /** @type Set<string|null> */ (this.transaction.changed.get(target))
       if (changed.has(null)) {
@@ -141,46 +208,6 @@ export class YEvent {
           packOp()
         }
       }
-      changed.forEach(key => {
-        if (key !== null) {
-          const item = /** @type {Item} */ (target._map.get(key))
-          /**
-           * @type {'delete' | 'add' | 'update'}
-           */
-          let action
-          let oldValue
-          if (this.adds(item)) {
-            let prev = item.left
-            while (prev !== null && this.adds(prev)) {
-              prev = prev.left
-            }
-            if (this.deletes(item)) {
-              if (prev !== null && this.deletes(prev)) {
-                action = 'delete'
-                oldValue = array.last(prev.content.getContent())
-              } else {
-                return
-              }
-            } else {
-              if (prev !== null && this.deletes(prev)) {
-                action = 'update'
-                oldValue = array.last(prev.content.getContent())
-              } else {
-                action = 'add'
-                oldValue = undefined
-              }
-            }
-          } else {
-            if (this.deletes(item)) {
-              action = 'delete'
-              oldValue = array.last(/** @type {Item} */ item.content.getContent())
-            } else {
-              return // nop
-            }
-          }
-          keys.set(key, { action, oldValue })
-        }
-      })
       this._changes = changes
     }
     return /** @type {any} */ (changes)