release: merge develop into rc/v12.2.0

2026-01-30 20:20:09 +01:00 · 2025-06-26 13:59:01 -07:00
parent 60fc20acef 0d6da6cfc4
commit e94b3501b1
43 changed files with 1093 additions and 589 deletions
--- a/.github/workflows/keyboard_plugin_test.yml
+++ b/.github/workflows/keyboard_plugin_test.yml
@@ -0,0 +1,66 @@
+# Workflow for running the keyboard navigation plugin's automated tests.
+
+name: Keyboard Navigation Automated Tests
+
+on:
+  workflow_dispatch:
+  pull_request:
+  push:
+    branches:
+      - develop
+
+permissions:
+  contents: read
+
+jobs:
+  webdriverio_tests:
+    name: WebdriverIO tests
+    timeout-minutes: 10
+    runs-on: ${{ matrix.os }}
+
+    strategy:
+      fail-fast: false
+      matrix:
+        os: [ubuntu-latest, macos-latest]
+
+    steps:
+      - name: Checkout core Blockly
+        uses: actions/checkout@v4
+        with:
+          path: core-blockly
+
+      - name: Checkout keyboard navigation plugin
+        uses: actions/checkout@v4
+        with:
+          repository: 'google/blockly-keyboard-experimentation'
+          ref: 'main'
+          path: blockly-keyboard-experimentation
+
+      - name: Use Node.js 20.x
+        uses: actions/setup-node@v4
+        with:
+          node-version: 20.x
+
+      - name: NPM install
+        run: |
+          cd core-blockly
+          npm install
+          cd ..
+          cd blockly-keyboard-experimentation
+          npm install
+          cd ..
+
+      - name: Link latest core develop with plugin
+        run: |
+          cd core-blockly
+          npm run package
+          cd dist
+          npm link
+          cd ../../blockly-keyboard-experimentation
+          npm link blockly
+          cd ..
+
+      - name: Run keyboard navigation plugin tests
+        run: |
+          cd blockly-keyboard-experimentation
+          npm run test
--- a/core/block.ts
+++ b/core/block.ts
@@ -791,6 +791,7 @@ export class Block {
  isDeletable(): boolean {
    return (
      this.deletable &&
+      !this.isInFlyout &&
      !this.shadow &&
      !this.isDeadOrDying() &&
      !this.workspace.isReadOnly()
@@ -824,6 +825,7 @@ export class Block {
  isMovable(): boolean {
    return (
      this.movable &&
+      !this.isInFlyout &&
      !this.shadow &&
      !this.isDeadOrDying() &&
      !this.workspace.isReadOnly()
--- a/core/block_svg.ts
+++ b/core/block_svg.ts
@@ -1721,6 +1721,11 @@ export class BlockSvg
    this.dragStrategy = dragStrategy;
  }

+  /** Returns whether this block is copyable or not. */
+  isCopyable(): boolean {
+    return this.isOwnDeletable() && this.isOwnMovable();
+  }
+
  /** Returns whether this block is movable or not. */
  override isMovable(): boolean {
    return this.dragStrategy.isMovable();
--- a/core/bubbles/mini_workspace_bubble.ts
+++ b/core/bubbles/mini_workspace_bubble.ts
@@ -153,7 +153,11 @@ export class MiniWorkspaceBubble extends Bubble {
   * are dealt with by resizing the workspace to show them.
   */
  private bumpBlocksIntoBounds() {
-    if (this.miniWorkspace.isDragging()) return;
+    if (
+      this.miniWorkspace.isDragging() &&
+      !this.miniWorkspace.keyboardMoveInProgress
+    )
+      return;

    const MARGIN = 20;

@@ -185,7 +189,15 @@ export class MiniWorkspaceBubble extends Bubble {
   * mini workspace.
   */
  private updateBubbleSize() {
-    if (this.miniWorkspace.isDragging()) return;
+    if (
+      this.miniWorkspace.isDragging() &&
+      !this.miniWorkspace.keyboardMoveInProgress
+    )
+      return;
+
+    // Disable autolayout if a keyboard move is in progress to prevent the
+    // mutator bubble from jumping around.
+    this.autoLayout &&= !this.miniWorkspace.keyboardMoveInProgress;

    const currSize = this.getSize();
    const newSize = this.calculateWorkspaceSize();
--- a/core/bubbles/textinput_bubble.ts
+++ b/core/bubbles/textinput_bubble.ts
@@ -173,6 +173,11 @@ export class TextInputBubble extends Bubble {
    browserEvents.conditionalBind(textArea, 'wheel', this, (e: Event) => {
      e.stopPropagation();
    });
+    // Don't let the pointerdown event get to the workspace.
+    browserEvents.conditionalBind(textArea, 'pointerdown', this, (e: Event) => {
+      e.stopPropagation();
+      touch.clearTouchIdentifier();
+    });

    browserEvents.conditionalBind(textArea, 'change', this, this.onTextChange);
  }
--- a/core/comments.ts
+++ b/core/comments.ts
@@ -4,6 +4,7 @@
 * SPDX-License-Identifier: Apache-2.0
 */

+export {CommentEditor} from './comments/comment_editor.js';
 export {CommentView} from './comments/comment_view.js';
 export {RenderedWorkspaceComment} from './comments/rendered_workspace_comment.js';
 export {WorkspaceComment} from './comments/workspace_comment.js';
--- a/core/comments/comment_editor.ts
+++ b/core/comments/comment_editor.ts
@@ -0,0 +1,190 @@
+/**
+ * @license
+ * Copyright 2024 Google LLC
+ * SPDX-License-Identifier: Apache-2.0
+ */
+
+import * as browserEvents from '../browser_events.js';
+import {getFocusManager} from '../focus_manager.js';
+import {IFocusableNode} from '../interfaces/i_focusable_node.js';
+import {IFocusableTree} from '../interfaces/i_focusable_tree.js';
+import * as touch from '../touch.js';
+import * as dom from '../utils/dom.js';
+import {Size} from '../utils/size.js';
+import {Svg} from '../utils/svg.js';
+import {WorkspaceSvg} from '../workspace_svg.js';
+
+/**
+ * String added to the ID of a workspace comment to identify
+ * the focusable node for the comment editor.
+ */
+export const COMMENT_EDITOR_FOCUS_IDENTIFIER = '_comment_textarea_';
+
+/** The part of a comment that can be typed into. */
+export class CommentEditor implements IFocusableNode {
+  id?: string;
+  /** The foreignObject containing the HTML text area. */
+  private foreignObject: SVGForeignObjectElement;
+
+  /** The text area where the user can type. */
+  private textArea: HTMLTextAreaElement;
+
+  /** Listeners for changes to text. */
+  private textChangeListeners: Array<
+    (oldText: string, newText: string) => void
+  > = [];
+
+  /** The current text of the comment. Updates on text area change. */
+  private text: string = '';
+
+  constructor(
+    public workspace: WorkspaceSvg,
+    commentId?: string,
+    private onFinishEditing?: () => void,
+  ) {
+    this.foreignObject = dom.createSvgElement(Svg.FOREIGNOBJECT, {
+      'class': 'blocklyCommentForeignObject',
+    });
+    const body = document.createElementNS(dom.HTML_NS, 'body');
+    body.setAttribute('xmlns', dom.HTML_NS);
+    body.className = 'blocklyMinimalBody';
+    this.textArea = document.createElementNS(
+      dom.HTML_NS,
+      'textarea',
+    ) as HTMLTextAreaElement;
+    dom.addClass(this.textArea, 'blocklyCommentText');
+    dom.addClass(this.textArea, 'blocklyTextarea');
+    dom.addClass(this.textArea, 'blocklyText');
+    body.appendChild(this.textArea);
+    this.foreignObject.appendChild(body);
+
+    if (commentId) {
+      this.id = commentId + COMMENT_EDITOR_FOCUS_IDENTIFIER;
+      this.textArea.setAttribute('id', this.id);
+    }
+
+    // Register browser event listeners for the user typing in the textarea.
+    browserEvents.conditionalBind(
+      this.textArea,
+      'change',
+      this,
+      this.onTextChange,
+    );
+
+    // Register listener for pointerdown to focus the textarea.
+    browserEvents.conditionalBind(
+      this.textArea,
+      'pointerdown',
+      this,
+      (e: PointerEvent) => {
+        // don't allow this event to bubble up
+        // and steal focus away from the editor/comment.
+        e.stopPropagation();
+        getFocusManager().focusNode(this);
+        touch.clearTouchIdentifier();
+      },
+    );
+
+    // Register listener for keydown events that would finish editing.
+    browserEvents.conditionalBind(
+      this.textArea,
+      'keydown',
+      this,
+      this.handleKeyDown,
+    );
+  }
+
+  /** Gets the dom structure for this comment editor. */
+  getDom(): SVGForeignObjectElement {
+    return this.foreignObject;
+  }
+
+  /** Gets the current text of the comment. */
+  getText(): string {
+    return this.text;
+  }
+
+  /** Sets the current text of the comment and fires change listeners. */
+  setText(text: string) {
+    this.textArea.value = text;
+    this.onTextChange();
+  }
+
+  /**
+   * Triggers listeners when the text of the comment changes, either
+   * programmatically or manually by the user.
+   */
+  private onTextChange() {
+    const oldText = this.text;
+    this.text = this.textArea.value;
+    // Loop through listeners backwards in case they remove themselves.
+    for (let i = this.textChangeListeners.length - 1; i >= 0; i--) {
+      this.textChangeListeners[i](oldText, this.text);
+    }
+  }
+
+  /**
+   * Do something when the user indicates they've finished editing.
+   *
+   * @param e Keyboard event.
+   */
+  private handleKeyDown(e: KeyboardEvent) {
+    if (e.key === 'Escape' || (e.key === 'Enter' && (e.ctrlKey || e.metaKey))) {
+      if (this.onFinishEditing) this.onFinishEditing();
+      e.stopPropagation();
+    }
+  }
+
+  /** Registers a callback that listens for text changes. */
+  addTextChangeListener(listener: (oldText: string, newText: string) => void) {
+    this.textChangeListeners.push(listener);
+  }
+
+  /** Removes the given listener from the list of text change listeners. */
+  removeTextChangeListener(listener: () => void) {
+    this.textChangeListeners.splice(
+      this.textChangeListeners.indexOf(listener),
+      1,
+    );
+  }
+
+  /** Sets the placeholder text displayed for an empty comment. */
+  setPlaceholderText(text: string) {
+    this.textArea.placeholder = text;
+  }
+
+  /** Sets whether the textarea is editable. If not, the textarea will be readonly. */
+  setEditable(isEditable: boolean) {
+    if (isEditable) {
+      this.textArea.removeAttribute('readonly');
+    } else {
+      this.textArea.setAttribute('readonly', 'true');
+    }
+  }
+
+  /** Update the size of the comment editor element. */
+  updateSize(size: Size, topBarSize: Size) {
+    this.foreignObject.setAttribute(
+      'height',
+      `${size.height - topBarSize.height}`,
+    );
+    this.foreignObject.setAttribute('width', `${size.width}`);
+    this.foreignObject.setAttribute('y', `${topBarSize.height}`);
+    if (this.workspace.RTL) {
+      this.foreignObject.setAttribute('x', `${-size.width}`);
+    }
+  }
+
+  getFocusableElement(): HTMLElement | SVGElement {
+    return this.textArea;
+  }
+  getFocusableTree(): IFocusableTree {
+    return this.workspace;
+  }
+  onNodeFocus(): void {}
+  onNodeBlur(): void {}
+  canBeFocused(): boolean {
+    if (this.id) return true;
+    return false;
+  }
+}
--- a/core/comments/comment_view.ts
+++ b/core/comments/comment_view.ts
@@ -6,6 +6,7 @@

 import * as browserEvents from '../browser_events.js';
 import * as css from '../css.js';
+import type {IFocusableNode} from '../interfaces/i_focusable_node';
 import {IRenderedElement} from '../interfaces/i_rendered_element.js';
 import * as layers from '../layers.js';
 import * as touch from '../touch.js';
@@ -15,6 +16,7 @@ import * as drag from '../utils/drag.js';
 import {Size} from '../utils/size.js';
 import {Svg} from '../utils/svg.js';
 import {WorkspaceSvg} from '../workspace_svg.js';
+import {CommentEditor} from './comment_editor.js';

 export class CommentView implements IRenderedElement {
  /** The root group element of the comment view. */
@@ -46,11 +48,8 @@ export class CommentView implements IRenderedElement {
  /** The resize handle element. */
  private resizeHandle: SVGImageElement;

-  /** The foreignObject containing the HTML text area. */
-  private foreignObject: SVGForeignObjectElement;
-
-  /** The text area where the user can type. */
-  private textArea: HTMLTextAreaElement;
+  /** The part of the comment view that contains the textarea to edit the comment. */
+  private commentEditor: CommentEditor;

  /** The current size of the comment in workspace units. */
  private size: Size;
@@ -64,14 +63,6 @@ export class CommentView implements IRenderedElement {
  /** The current location of the comment in workspace coordinates. */
  private location: Coordinate = new Coordinate(0, 0);

-  /** The current text of the comment. Updates on  text area change. */
-  private text: string = '';
-
-  /** Listeners for changes to text. */
-  private textChangeListeners: Array<
-    (oldText: string, newText: string) => void
-  > = [];
-
  /** Listeners for changes to size. */
  private sizeChangeListeners: Array<(oldSize: Size, newSize: Size) => void> =
    [];
@@ -106,7 +97,10 @@ export class CommentView implements IRenderedElement {
  /** The default size of newly created comments. */
  static defaultCommentSize = new Size(120, 100);

-  constructor(readonly workspace: WorkspaceSvg) {
+  constructor(
+    readonly workspace: WorkspaceSvg,
+    private commentId?: string,
+  ) {
    this.svgRoot = dom.createSvgElement(Svg.G, {
      'class': 'blocklyComment blocklyEditable blocklyDraggable',
    });
@@ -122,8 +116,7 @@ export class CommentView implements IRenderedElement {
      textPreviewNode: this.textPreviewNode,
    } = this.createTopBar(this.svgRoot, workspace));

-    ({foreignObject: this.foreignObject, textArea: this.textArea} =
-      this.createTextArea(this.svgRoot));
+    this.commentEditor = this.createTextArea();

    this.resizeHandle = this.createResizeHandle(this.svgRoot, workspace);

@@ -236,33 +229,32 @@ export class CommentView implements IRenderedElement {
  /**
   * Creates the text area where users can type. Registers event listeners.
   */
-  private createTextArea(svgRoot: SVGGElement): {
-    foreignObject: SVGForeignObjectElement;
-    textArea: HTMLTextAreaElement;
-  } {
-    const foreignObject = dom.createSvgElement(
-      Svg.FOREIGNOBJECT,
-      {
-        'class': 'blocklyCommentForeignObject',
-      },
-      svgRoot,
+  private createTextArea() {
+    // When the user is done editing comment, focus the entire comment.
+    const onFinishEditing = () => this.svgRoot.focus();
+    const commentEditor = new CommentEditor(
+      this.workspace,
+      this.commentId,
+      onFinishEditing,
    );
-    const body = document.createElementNS(dom.HTML_NS, 'body');
-    body.setAttribute('xmlns', dom.HTML_NS);
-    body.className = 'blocklyMinimalBody';
-    const textArea = document.createElementNS(
-      dom.HTML_NS,
-      'textarea',
-    ) as HTMLTextAreaElement;
-    dom.addClass(textArea, 'blocklyCommentText');
-    dom.addClass(textArea, 'blocklyTextarea');
-    dom.addClass(textArea, 'blocklyText');
-    body.appendChild(textArea);
-    foreignObject.appendChild(body);

-    browserEvents.conditionalBind(textArea, 'change', this, this.onTextChange);
+    this.svgRoot.appendChild(commentEditor.getDom());

-    return {foreignObject, textArea};
+    commentEditor.addTextChangeListener((oldText, newText) => {
+      this.updateTextPreview(newText);
+      // Update size in case our minimum size increased.
+      this.setSize(this.size);
+    });
+
+    return commentEditor;
+  }
+
+  /**
+   *
+   * @returns The FocusableNode representing the editor portion of this comment.
+   */
+  getEditorFocusableNode(): IFocusableNode {
+    return this.commentEditor;
  }

  /** Creates the DOM elements for the comment resize handle. */
@@ -324,7 +316,7 @@ export class CommentView implements IRenderedElement {

    this.updateHighlightRect(size);
    this.updateTopBarSize(size);
-    this.updateTextAreaSize(size, topBarSize);
+    this.commentEditor.updateSize(size, topBarSize);
    this.updateDeleteIconPosition(size, topBarSize, deleteSize);
    this.updateFoldoutIconPosition(topBarSize, foldoutSize);
    this.updateTextPreviewSize(
@@ -360,7 +352,7 @@ export class CommentView implements IRenderedElement {
    foldoutSize: Size,
    deleteSize: Size,
  ): Size {
-    this.updateTextPreview(this.textArea.value ?? '');
+    this.updateTextPreview(this.commentEditor.getText() ?? '');
    const textPreviewWidth = dom.getTextWidth(this.textPreview);

    const foldoutMargin = this.calcFoldoutMargin(topBarSize, foldoutSize);
@@ -408,19 +400,6 @@ export class CommentView implements IRenderedElement {
    this.topBarBackground.setAttribute('width', `${size.width}`);
  }

-  /** Updates the size of the text area elements to reflect the new size. */
-  private updateTextAreaSize(size: Size, topBarSize: Size) {
-    this.foreignObject.setAttribute(
-      'height',
-      `${size.height - topBarSize.height}`,
-    );
-    this.foreignObject.setAttribute('width', `${size.width}`);
-    this.foreignObject.setAttribute('y', `${topBarSize.height}`);
-    if (this.workspace.RTL) {
-      this.foreignObject.setAttribute('x', `${-size.width}`);
-    }
-  }
-
  /**
   * Updates the position of the delete icon elements to reflect the new size.
   */
@@ -652,12 +631,11 @@ export class CommentView implements IRenderedElement {
    if (this.editable) {
      dom.addClass(this.svgRoot, 'blocklyEditable');
      dom.removeClass(this.svgRoot, 'blocklyReadonly');
-      this.textArea.removeAttribute('readonly');
    } else {
      dom.removeClass(this.svgRoot, 'blocklyEditable');
      dom.addClass(this.svgRoot, 'blocklyReadonly');
-      this.textArea.setAttribute('readonly', 'true');
    }
+    this.commentEditor.setEditable(editable);
  }

  /** Returns the current location of the comment in workspace coordinates. */
@@ -678,49 +656,29 @@ export class CommentView implements IRenderedElement {
    );
  }

-  /** Retursn the current text of the comment. */
+  /** Returns the current text of the comment. */
  getText() {
-    return this.text;
+    return this.commentEditor.getText();
  }

  /** Sets the current text of the comment. */
  setText(text: string) {
-    this.textArea.value = text;
-    this.onTextChange();
+    this.commentEditor.setText(text);
  }

  /** Sets the placeholder text displayed for an empty comment. */
  setPlaceholderText(text: string) {
-    this.textArea.placeholder = text;
+    this.commentEditor.setPlaceholderText(text);
  }

-  /** Registers a callback that listens for text changes. */
+  /** Registers a callback that listens for text changes on the comment editor. */
  addTextChangeListener(listener: (oldText: string, newText: string) => void) {
-    this.textChangeListeners.push(listener);
+    this.commentEditor.addTextChangeListener(listener);
  }

-  /** Removes the given listener from the list of text change listeners. */
+  /** Removes the given listener from the comment editor. */
  removeTextChangeListener(listener: () => void) {
-    this.textChangeListeners.splice(
-      this.textChangeListeners.indexOf(listener),
-      1,
-    );
-  }
-
-  /**
-   * Triggers listeners when the text of the comment changes, either
-   * programmatically or manually by the user.
-   */
-  private onTextChange() {
-    const oldText = this.text;
-    this.text = this.textArea.value;
-    this.updateTextPreview(this.text);
-    // Update size in case our minimum size increased.
-    this.setSize(this.size);
-    // Loop through listeners backwards in case they remove themselves.
-    for (let i = this.textChangeListeners.length - 1; i >= 0; i--) {
-      this.textChangeListeners[i](oldText, this.text);
-    }
+    this.commentEditor.removeTextChangeListener(listener);
  }

  /** Updates the preview text element to reflect the given text. */
@@ -884,6 +842,11 @@ css.register(`
  fill: none;
 }

+.blocklyCommentText.blocklyActiveFocus {
+  border-color: #fc3;
+  border-width: 2px;
+}
+
 .blocklySelected .blocklyCommentHighlight {
  stroke: #fc3;
  stroke-width: 3px;
--- a/core/comments/rendered_workspace_comment.ts
+++ b/core/comments/rendered_workspace_comment.ts
@@ -47,7 +47,7 @@ export class RenderedWorkspaceComment
    IFocusableNode
 {
  /** The class encompassing the svg elements making up the workspace comment. */
-  private view: CommentView;
+  view: CommentView;

  public readonly workspace: WorkspaceSvg;

@@ -59,7 +59,7 @@ export class RenderedWorkspaceComment

    this.workspace = workspace;

-    this.view = new CommentView(workspace);
+    this.view = new CommentView(workspace, this.id);
    // Set the size to the default size as defined in the superclass.
    this.view.setSize(this.getSize());
    this.view.setEditable(this.isEditable());
@@ -224,13 +224,7 @@ export class RenderedWorkspaceComment
  private startGesture(e: PointerEvent) {
    const gesture = this.workspace.getGesture(e);
    if (gesture) {
-      if (browserEvents.isTargetInput(e)) {
-        // If the text area was the focus, don't allow this event to bubble up
-        // and steal focus away from the editor/comment.
-        e.stopPropagation();
-      } else {
-        gesture.handleCommentStart(e, this);
-      }
+      gesture.handleCommentStart(e, this);
      getFocusManager().focusNode(this);
    }
  }
@@ -244,6 +238,11 @@ export class RenderedWorkspaceComment
    }
  }

+  /** Returns whether this comment is copyable or not */
+  isCopyable(): boolean {
+    return this.isOwnMovable() && this.isOwnDeletable();
+  }
+
  /** Returns whether this comment is movable or not. */
  isMovable(): boolean {
    return this.dragStrategy.isMovable();
@@ -334,6 +333,13 @@ export class RenderedWorkspaceComment
    }
  }

+  /**
+   * @returns The FocusableNode representing the editor portion of this comment.
+   */
+  getEditorFocusableNode(): IFocusableNode {
+    return this.view.getEditorFocusableNode();
+  }
+
  /** See IFocusableNode.getFocusableElement. */
  getFocusableElement(): HTMLElement | SVGElement {
    return this.getSvgRoot();
--- a/core/comments/workspace_comment.ts
+++ b/core/comments/workspace_comment.ts
@@ -165,7 +165,11 @@ export class WorkspaceComment {
   * workspace is read-only.
   */
  isMovable() {
-    return this.isOwnMovable() && !this.workspace.isReadOnly();
+    return (
+      this.isOwnMovable() &&
+      !this.workspace.isReadOnly() &&
+      !this.workspace.isFlyout
+    );
  }

  /**
@@ -189,7 +193,8 @@ export class WorkspaceComment {
    return (
      this.isOwnDeletable() &&
      !this.isDeadOrDying() &&
-      !this.workspace.isReadOnly()
+      !this.workspace.isReadOnly() &&
+      !this.workspace.isFlyout
    );
  }

--- a/core/common.ts
+++ b/core/common.ts
@@ -320,21 +320,28 @@ export function defineBlocks(blocks: {[key: string]: BlockDefinition}) {
 * @param e Key down event.
 */
 export function globalShortcutHandler(e: KeyboardEvent) {
-  const mainWorkspace = getMainWorkspace() as WorkspaceSvg;
-  if (!mainWorkspace) {
-    return;
+  // This would ideally just be a `focusedTree instanceof WorkspaceSvg`, but
+  // importing `WorkspaceSvg` (as opposed to just its type) causes cycles.
+  let workspace: WorkspaceSvg = getMainWorkspace() as WorkspaceSvg;
+  const focusedTree = getFocusManager().getFocusedTree();
+  for (const ws of getAllWorkspaces()) {
+    if (focusedTree === (ws as WorkspaceSvg)) {
+      workspace = ws as WorkspaceSvg;
+      break;
+    }
  }

  if (
    browserEvents.isTargetInput(e) ||
-    (mainWorkspace.rendered && !mainWorkspace.isVisible())
+    !workspace ||
+    (workspace.rendered && !workspace.isFlyout && !workspace.isVisible())
  ) {
    // When focused on an HTML text input widget, don't trap any keys.
    // Ignore keypresses on rendered workspaces that have been explicitly
    // hidden.
    return;
  }
-  ShortcutRegistry.registry.onKeyDown(mainWorkspace, e);
+  ShortcutRegistry.registry.onKeyDown(workspace, e);
 }

 export const TEST_ONLY = {defineBlocksWithJsonArrayInternal};
--- a/core/icons/mutator_icon.ts
+++ b/core/icons/mutator_icon.ts
@@ -14,7 +14,6 @@ import {BlockChange} from '../events/events_block_change.js';
 import {isBlockChange, isBlockCreate} from '../events/predicates.js';
 import {EventType} from '../events/type.js';
 import * as eventUtils from '../events/utils.js';
-import type {IBubble} from '../interfaces/i_bubble.js';
 import type {IHasBubble} from '../interfaces/i_has_bubble.js';
 import * as renderManagement from '../render_management.js';
 import {Coordinate} from '../utils/coordinate.js';
@@ -205,7 +204,7 @@ export class MutatorIcon extends Icon implements IHasBubble {
  }

  /** See IHasBubble.getBubble. */
-  getBubble(): IBubble | null {
+  getBubble(): MiniWorkspaceBubble | null {
    return this.miniWorkspaceBubble;
  }

--- a/core/interfaces/i_autohideable.ts
+++ b/core/interfaces/i_autohideable.ts
@@ -23,5 +23,5 @@ export interface IAutoHideable extends IComponent {

 /** Returns true if the given object is autohideable. */
 export function isAutoHideable(obj: any): obj is IAutoHideable {
-  return obj.autoHide !== undefined;
+  return obj && typeof obj.autoHide === 'function';
 }
--- a/core/interfaces/i_comment_icon.ts
+++ b/core/interfaces/i_comment_icon.ts
@@ -31,17 +31,17 @@ export interface ICommentIcon extends IIcon, IHasBubble, ISerializable {
 }

 /** Checks whether the given object is an ICommentIcon. */
-export function isCommentIcon(obj: object): obj is ICommentIcon {
+export function isCommentIcon(obj: any): obj is ICommentIcon {
  return (
    isIcon(obj) &&
    hasBubble(obj) &&
    isSerializable(obj) &&
-    (obj as any)['setText'] !== undefined &&
-    (obj as any)['getText'] !== undefined &&
-    (obj as any)['setBubbleSize'] !== undefined &&
-    (obj as any)['getBubbleSize'] !== undefined &&
-    (obj as any)['setBubbleLocation'] !== undefined &&
-    (obj as any)['getBubbleLocation'] !== undefined &&
+    typeof (obj as any).setText === 'function' &&
+    typeof (obj as any).getText === 'function' &&
+    typeof (obj as any).setBubbleSize === 'function' &&
+    typeof (obj as any).getBubbleSize === 'function' &&
+    typeof (obj as any).setBubbleLocation === 'function' &&
+    typeof (obj as any).getBubbleLocation === 'function' &&
    obj.getType() === IconType.COMMENT
  );
 }
--- a/core/interfaces/i_copyable.ts
+++ b/core/interfaces/i_copyable.ts
@@ -15,6 +15,14 @@ export interface ICopyable<T extends ICopyData> extends ISelectable {
   * @returns Copy metadata.
   */
  toCopyData(): T | null;
+
+  /**
+   * Whether this instance is currently copyable. The standard implementation
+   * is to return true if isOwnDeletable and isOwnMovable return true.
+   *
+   * @returns True if it can currently be copied.
+   */
+  isCopyable?(): boolean;
 }

 export namespace ICopyable {
@@ -25,7 +33,7 @@ export namespace ICopyable {

 export type ICopyData = ICopyable.ICopyData;

-/** @returns true if the given object is copyable. */
+/** @returns true if the given object is an ICopyable. */
 export function isCopyable(obj: any): obj is ICopyable<ICopyData> {
-  return obj.toCopyData !== undefined;
+  return obj && typeof obj.toCopyData === 'function';
 }
--- a/core/interfaces/i_deletable.ts
+++ b/core/interfaces/i_deletable.ts
@@ -27,8 +27,9 @@ export interface IDeletable {
 /** Returns whether the given object is an IDeletable. */
 export function isDeletable(obj: any): obj is IDeletable {
  return (
-    obj['isDeletable'] !== undefined &&
-    obj['dispose'] !== undefined &&
-    obj['setDeleteStyle'] !== undefined
+    obj &&
+    typeof obj.isDeletable === 'function' &&
+    typeof obj.dispose === 'function' &&
+    typeof obj.setDeleteStyle === 'function'
  );
 }
--- a/core/interfaces/i_draggable.ts
+++ b/core/interfaces/i_draggable.ts
@@ -62,11 +62,12 @@ export interface IDragStrategy {
 /** Returns whether the given object is an IDraggable or not. */
 export function isDraggable(obj: any): obj is IDraggable {
  return (
-    obj.getRelativeToSurfaceXY !== undefined &&
-    obj.isMovable !== undefined &&
-    obj.startDrag !== undefined &&
-    obj.drag !== undefined &&
-    obj.endDrag !== undefined &&
-    obj.revertDrag !== undefined
+    obj &&
+    typeof obj.getRelativeToSurfaceXY === 'function' &&
+    typeof obj.isMovable === 'function' &&
+    typeof obj.startDrag === 'function' &&
+    typeof obj.drag === 'function' &&
+    typeof obj.endDrag === 'function' &&
+    typeof obj.revertDrag === 'function'
  );
 }
--- a/core/interfaces/i_focusable_node.ts
+++ b/core/interfaces/i_focusable_node.ts
@@ -102,16 +102,16 @@ export interface IFocusableNode {
 * Determines whether the provided object fulfills the contract of
 * IFocusableNode.
 *
- * @param object The object to test.
+ * @param obj The object to test.
 * @returns Whether the provided object can be used as an IFocusableNode.
 */
-export function isFocusableNode(object: any | null): object is IFocusableNode {
+export function isFocusableNode(obj: any): obj is IFocusableNode {
  return (
-    object &&
-    'getFocusableElement' in object &&
-    'getFocusableTree' in object &&
-    'onNodeFocus' in object &&
-    'onNodeBlur' in object &&
-    'canBeFocused' in object
+    obj &&
+    typeof obj.getFocusableElement === 'function' &&
+    typeof obj.getFocusableTree === 'function' &&
+    typeof obj.onNodeFocus === 'function' &&
+    typeof obj.onNodeBlur === 'function' &&
+    typeof obj.canBeFocused === 'function'
  );
 }
--- a/core/interfaces/i_focusable_tree.ts
+++ b/core/interfaces/i_focusable_tree.ts
@@ -128,17 +128,17 @@ export interface IFocusableTree {
 * Determines whether the provided object fulfills the contract of
 * IFocusableTree.
 *
- * @param object The object to test.
+ * @param obj The object to test.
 * @returns Whether the provided object can be used as an IFocusableTree.
 */
-export function isFocusableTree(object: any | null): object is IFocusableTree {
+export function isFocusableTree(obj: any): obj is IFocusableTree {
  return (
-    object &&
-    'getRootFocusableNode' in object &&
-    'getRestoredFocusableNode' in object &&
-    'getNestedTrees' in object &&
-    'lookUpFocusableNode' in object &&
-    'onTreeFocus' in object &&
-    'onTreeBlur' in object
+    obj &&
+    typeof obj.getRootFocusableNode === 'function' &&
+    typeof obj.getRestoredFocusableNode === 'function' &&
+    typeof obj.getNestedTrees === 'function' &&
+    typeof obj.lookUpFocusableNode === 'function' &&
+    typeof obj.onTreeFocus === 'function' &&
+    typeof obj.onTreeBlur === 'function'
  );
 }
--- a/core/interfaces/i_has_bubble.ts
+++ b/core/interfaces/i_has_bubble.ts
@@ -30,6 +30,8 @@ export interface IHasBubble {
 /** Type guard that checks whether the given object is a IHasBubble. */
 export function hasBubble(obj: any): obj is IHasBubble {
  return (
-    obj.bubbleIsVisible !== undefined && obj.setBubbleVisible !== undefined
+    typeof obj.bubbleIsVisible === 'function' &&
+    typeof obj.setBubbleVisible === 'function' &&
+    typeof obj.getBubble === 'function'
  );
 }
--- a/core/interfaces/i_icon.ts
+++ b/core/interfaces/i_icon.ts
@@ -98,19 +98,19 @@ export interface IIcon extends IFocusableNode {
 /** Type guard that checks whether the given object is an IIcon. */
 export function isIcon(obj: any): obj is IIcon {
  return (
-    obj.getType !== undefined &&
-    obj.initView !== undefined &&
-    obj.dispose !== undefined &&
-    obj.getWeight !== undefined &&
-    obj.getSize !== undefined &&
-    obj.applyColour !== undefined &&
-    obj.hideForInsertionMarker !== undefined &&
-    obj.updateEditable !== undefined &&
-    obj.updateCollapsed !== undefined &&
-    obj.isShownWhenCollapsed !== undefined &&
-    obj.setOffsetInBlock !== undefined &&
-    obj.onLocationChange !== undefined &&
-    obj.onClick !== undefined &&
-    isFocusableNode(obj)
+    isFocusableNode(obj) &&
+    typeof (obj as IIcon).getType === 'function' &&
+    typeof (obj as IIcon).initView === 'function' &&
+    typeof (obj as IIcon).dispose === 'function' &&
+    typeof (obj as IIcon).getWeight === 'function' &&
+    typeof (obj as IIcon).getSize === 'function' &&
+    typeof (obj as IIcon).applyColour === 'function' &&
+    typeof (obj as IIcon).hideForInsertionMarker === 'function' &&
+    typeof (obj as IIcon).updateEditable === 'function' &&
+    typeof (obj as IIcon).updateCollapsed === 'function' &&
+    typeof (obj as IIcon).isShownWhenCollapsed === 'function' &&
+    typeof (obj as IIcon).setOffsetInBlock === 'function' &&
+    typeof (obj as IIcon).onLocationChange === 'function' &&
+    typeof (obj as IIcon).onClick === 'function'
  );
 }
--- a/core/interfaces/i_legacy_procedure_blocks.ts
+++ b/core/interfaces/i_legacy_procedure_blocks.ts
@@ -28,9 +28,9 @@ export interface LegacyProcedureDefBlock {

 /** @internal */
 export function isLegacyProcedureDefBlock(
-  block: object,
-): block is LegacyProcedureDefBlock {
-  return (block as any).getProcedureDef !== undefined;
+  obj: any,
+): obj is LegacyProcedureDefBlock {
+  return obj && typeof obj.getProcedureDef === 'function';
 }

 /** @internal */
@@ -41,10 +41,11 @@ export interface LegacyProcedureCallBlock {

 /** @internal */
 export function isLegacyProcedureCallBlock(
-  block: object,
-): block is LegacyProcedureCallBlock {
+  obj: any,
+): obj is LegacyProcedureCallBlock {
  return (
-    (block as any).getProcedureCall !== undefined &&
-    (block as any).renameProcedure !== undefined
+    obj &&
+    typeof obj.getProcedureCall === 'function' &&
+    typeof obj.renameProcedure === 'function'
  );
 }
--- a/core/interfaces/i_observable.ts
+++ b/core/interfaces/i_observable.ts
@@ -20,5 +20,9 @@ export interface IObservable {
 * @internal
 */
 export function isObservable(obj: any): obj is IObservable {
-  return obj.startPublishing !== undefined && obj.stopPublishing !== undefined;
+  return (
+    obj &&
+    typeof obj.startPublishing === 'function' &&
+    typeof obj.stopPublishing === 'function'
+  );
 }
--- a/core/interfaces/i_paster.ts
+++ b/core/interfaces/i_paster.ts
@@ -21,5 +21,5 @@ export interface IPaster<U extends ICopyData, T extends ICopyable<U>> {
 export function isPaster(
  obj: any,
 ): obj is IPaster<ICopyData, ICopyable<ICopyData>> {
-  return obj.paste !== undefined;
+  return obj && typeof obj.paste === 'function';
 }
--- a/core/interfaces/i_procedure_block.ts
+++ b/core/interfaces/i_procedure_block.ts
@@ -20,9 +20,10 @@ export interface IProcedureBlock {
 export function isProcedureBlock(
  block: Block | IProcedureBlock,
 ): block is IProcedureBlock {
+  block = block as IProcedureBlock;
  return (
-    (block as IProcedureBlock).getProcedureModel !== undefined &&
-    (block as IProcedureBlock).doProcedureUpdate !== undefined &&
-    (block as IProcedureBlock).isProcedureDef !== undefined
+    typeof block.getProcedureModel === 'function' &&
+    typeof block.doProcedureUpdate === 'function' &&
+    typeof block.isProcedureDef === 'function'
  );
 }
--- a/core/interfaces/i_rendered_element.ts
+++ b/core/interfaces/i_rendered_element.ts
@@ -15,5 +15,5 @@ export interface IRenderedElement {
 * @returns True if the given object is an IRenderedElement.
 */
 export function isRenderedElement(obj: any): obj is IRenderedElement {
-  return obj['getSvgRoot'] !== undefined;
+  return obj && typeof obj.getSvgRoot === 'function';
 }
--- a/core/interfaces/i_selectable.ts
+++ b/core/interfaces/i_selectable.ts
@@ -30,12 +30,12 @@ export interface ISelectable extends IFocusableNode {
 }

 /** Checks whether the given object is an ISelectable. */
-export function isSelectable(obj: object): obj is ISelectable {
+export function isSelectable(obj: any): obj is ISelectable {
  return (
-    typeof (obj as any).id === 'string' &&
-    (obj as any).workspace !== undefined &&
-    (obj as any).select !== undefined &&
-    (obj as any).unselect !== undefined &&
-    isFocusableNode(obj)
+    isFocusableNode(obj) &&
+    typeof (obj as ISelectable).id === 'string' &&
+    typeof (obj as ISelectable).workspace === 'object' &&
+    typeof (obj as ISelectable).select === 'function' &&
+    typeof (obj as ISelectable).unselect === 'function'
  );
 }
--- a/core/interfaces/i_serializable.ts
+++ b/core/interfaces/i_serializable.ts
@@ -24,5 +24,9 @@ export interface ISerializable {

 /** Type guard that checks whether the given object is a ISerializable. */
 export function isSerializable(obj: any): obj is ISerializable {
-  return obj.saveState !== undefined && obj.loadState !== undefined;
+  return (
+    obj &&
+    typeof obj.saveState === 'function' &&
+    typeof obj.loadState === 'function'
+  );
 }
--- a/core/keyboard_nav/block_navigation_policy.ts
+++ b/core/keyboard_nav/block_navigation_policy.ts
@@ -24,7 +24,7 @@ export class BlockNavigationPolicy implements INavigationPolicy<BlockSvg> {
   * @returns The first field or input of the given block, if any.
   */
  getFirstChild(current: BlockSvg): IFocusableNode | null {
-    const candidates = getBlockNavigationCandidates(current);
+    const candidates = getBlockNavigationCandidates(current, true);
    return candidates[0];
  }

@@ -58,6 +58,8 @@ export class BlockNavigationPolicy implements INavigationPolicy<BlockSvg> {
      return current.nextConnection?.targetBlock();
    } else if (current.outputConnection?.targetBlock()) {
      return navigateBlock(current, 1);
+    } else if (current.getSurroundParent()) {
+      return navigateBlock(current.getTopStackBlock(), 1);
    } else if (this.getParent(current) instanceof WorkspaceSvg) {
      return navigateStacks(current, 1);
    }
@@ -111,14 +113,27 @@ export class BlockNavigationPolicy implements INavigationPolicy<BlockSvg> {
 * @param block The block to retrieve the navigable children of.
 * @returns A list of navigable/focusable children of the given block.
 */
-function getBlockNavigationCandidates(block: BlockSvg): IFocusableNode[] {
+function getBlockNavigationCandidates(
+  block: BlockSvg,
+  forward: boolean,
+): IFocusableNode[] {
  const candidates: IFocusableNode[] = block.getIcons();

  for (const input of block.inputList) {
    if (!input.isVisible()) continue;
    candidates.push(...input.fieldRow);
    if (input.connection?.targetBlock()) {
-      candidates.push(input.connection.targetBlock() as BlockSvg);
+      const connectedBlock = input.connection.targetBlock() as BlockSvg;
+      if (input.connection.type === ConnectionType.NEXT_STATEMENT && !forward) {
+        const lastStackBlock = connectedBlock
+          .lastConnectionInStack(false)
+          ?.getSourceBlock();
+        if (lastStackBlock) {
+          candidates.push(lastStackBlock);
+        }
+      } else {
+        candidates.push(connectedBlock);
+      }
    } else if (input.connection?.type === ConnectionType.INPUT_VALUE) {
      candidates.push(input.connection as RenderedConnection);
    }
@@ -174,11 +189,11 @@ export function navigateBlock(
 ): IFocusableNode | null {
  const block =
    current instanceof BlockSvg
-      ? current.outputConnection.targetBlock()
+      ? (current.outputConnection?.targetBlock() ?? current.getSurroundParent())
      : current.getSourceBlock();
  if (!(block instanceof BlockSvg)) return null;

-  const candidates = getBlockNavigationCandidates(block);
+  const candidates = getBlockNavigationCandidates(block, delta > 0);
  const currentIndex = candidates.indexOf(current);
  if (currentIndex === -1) return null;

--- a/core/keyboard_nav/icon_navigation_policy.ts
+++ b/core/keyboard_nav/icon_navigation_policy.ts
@@ -5,7 +5,9 @@
 */

 import {BlockSvg} from '../block_svg.js';
+import {getFocusManager} from '../focus_manager.js';
 import {Icon} from '../icons/icon.js';
+import {MutatorIcon} from '../icons/mutator_icon.js';
 import type {IFocusableNode} from '../interfaces/i_focusable_node.js';
 import type {INavigationPolicy} from '../interfaces/i_navigation_policy.js';
 import {navigateBlock} from './block_navigation_policy.js';
@@ -17,10 +19,18 @@ export class IconNavigationPolicy implements INavigationPolicy<Icon> {
  /**
   * Returns the first child of the given icon.
   *
-   * @param _current The icon to return the first child of.
+   * @param current The icon to return the first child of.
   * @returns Null.
   */
-  getFirstChild(_current: Icon): IFocusableNode | null {
+  getFirstChild(current: Icon): IFocusableNode | null {
+    if (
+      current instanceof MutatorIcon &&
+      current.bubbleIsVisible() &&
+      getFocusManager().getFocusedNode() === current
+    ) {
+      return current.getBubble()?.getWorkspace() ?? null;
+    }
+
    return null;
  }

--- a/core/keyboard_nav/line_cursor.ts
+++ b/core/keyboard_nav/line_cursor.ts
@@ -17,7 +17,6 @@ import {BlockSvg} from '../block_svg.js';
 import {Field} from '../field.js';
 import {getFocusManager} from '../focus_manager.js';
 import type {IFocusableNode} from '../interfaces/i_focusable_node.js';
-import {isFocusableNode} from '../interfaces/i_focusable_node.js';
 import * as registry from '../registry.js';
 import {WorkspaceSvg} from '../workspace_svg.js';
 import {Marker} from './marker.js';
@@ -374,17 +373,8 @@ export class LineCursor extends Marker {
   *
   * @returns The current field, connection, or block the cursor is on.
   */
-  override getCurNode(): IFocusableNode | null {
-    // Ensure the current node matches what's currently focused.
-    const focused = getFocusManager().getFocusedNode();
-    const block = this.getSourceBlockFromNode(focused);
-    if (block && block.workspace === this.workspace) {
-      // If the current focused node corresponds to a block then ensure that it
-      // belongs to the correct workspace for this cursor.
-      this.setCurNode(focused);
-    }
-
-    return super.getCurNode();
+  getCurNode(): IFocusableNode | null {
+    return getFocusManager().getFocusedNode();
  }

  /**
@@ -395,12 +385,8 @@ export class LineCursor extends Marker {
   *
   * @param newNode The new location of the cursor.
   */
-  override setCurNode(newNode: IFocusableNode | null) {
-    super.setCurNode(newNode);
-
-    if (isFocusableNode(newNode)) {
-      getFocusManager().focusNode(newNode);
-    }
+  setCurNode(newNode: IFocusableNode) {
+    getFocusManager().focusNode(newNode);

    // Try to scroll cursor into view.
    if (newNode instanceof BlockSvg) {
--- a/core/keyboard_nav/workspace_navigation_policy.ts
+++ b/core/keyboard_nav/workspace_navigation_policy.ts
@@ -62,7 +62,7 @@ export class WorkspaceNavigationPolicy
   * @returns True if the given workspace can be focused.
   */
  isNavigable(current: WorkspaceSvg): boolean {
-    return current.canBeFocused();
+    return current.canBeFocused() && !current.isMutator;
  }

  /**
--- a/core/navigator.ts
+++ b/core/navigator.ts
@@ -64,9 +64,8 @@ export class Navigator {
  getFirstChild(current: IFocusableNode): IFocusableNode | null {
    const result = this.get(current)?.getFirstChild(current);
    if (!result) return null;
-    // If the child isn't navigable, don't traverse into it; check its peers.
    if (!this.get(result)?.isNavigable(result)) {
-      return this.getNextSibling(result);
+      return this.getFirstChild(result) || this.getNextSibling(result);
    }
    return result;
  }
--- a/core/shortcut_items.ts
+++ b/core/shortcut_items.ts
@@ -8,19 +8,13 @@

 import {BlockSvg} from './block_svg.js';
 import * as clipboard from './clipboard.js';
+import {RenderedWorkspaceComment} from './comments.js';
 import * as eventUtils from './events/utils.js';
 import {getFocusManager} from './focus_manager.js';
 import {Gesture} from './gesture.js';
-import {
-  ICopyable,
-  ICopyData,
-  isCopyable as isICopyable,
-} from './interfaces/i_copyable.js';
-import {
-  IDeletable,
-  isDeletable as isIDeletable,
-} from './interfaces/i_deletable.js';
-import {IDraggable, isDraggable} from './interfaces/i_draggable.js';
+import {ICopyData, isCopyable as isICopyable} from './interfaces/i_copyable.js';
+import {isDeletable as isIDeletable} from './interfaces/i_deletable.js';
+import {isDraggable} from './interfaces/i_draggable.js';
 import {IFocusableNode} from './interfaces/i_focusable_node.js';
 import {KeyboardShortcut, ShortcutRegistry} from './shortcut_registry.js';
 import {Coordinate} from './utils/coordinate.js';
@@ -100,74 +94,43 @@ export function registerDelete() {
 }

 let copyData: ICopyData | null = null;
-let copyWorkspace: WorkspaceSvg | null = null;
 let copyCoords: Coordinate | null = null;

 /**
 * Determine if a focusable node can be copied.
 *
- * Unfortunately the ICopyable interface doesn't include an isCopyable
- * method, so we must use some other criteria to make the decision.
- * Specifically,
- *
- * - It must be an ICopyable.
- * - So that a pasted copy can be manipluated and/or disposed of, it
- *   must be both an IDraggable and an IDeletable.
- * - Additionally, both .isOwnMovable() and .isOwnDeletable() must return
- *   true (i.e., the copy could be moved and deleted).
- *
- * TODO(#9098): Revise these criteria.  The latter criteria prevents
- * shadow blocks from being copied; additionally, there are likely to
- * be other circumstances were it is desirable to allow movable /
- * copyable copies of a currently-unmovable / -copyable block to be
- * made.
+ * This will use the isCopyable method if the node implements it, otherwise
+ * it will fall back to checking if the node is deletable and draggable not
+ * considering the workspace's edit state.
 *
 * @param focused The focused object.
 */
-function isCopyable(
-  focused: IFocusableNode,
-): focused is ICopyable<ICopyData> & IDeletable & IDraggable {
-  if (!(focused instanceof BlockSvg)) return false;
-  return (
-    isICopyable(focused) &&
-    isIDeletable(focused) &&
-    focused.isOwnDeletable() &&
-    isDraggable(focused) &&
-    focused.isOwnMovable()
-  );
+function isCopyable(focused: IFocusableNode): boolean {
+  if (!isICopyable(focused) || !isIDeletable(focused) || !isDraggable(focused))
+    return false;
+  if (focused.isCopyable) {
+    return focused.isCopyable();
+  } else if (
+    focused instanceof BlockSvg ||
+    focused instanceof RenderedWorkspaceComment
+  ) {
+    return focused.isOwnDeletable() && focused.isOwnMovable();
+  }
+  // This isn't a class Blockly knows about, so fall back to the stricter
+  // checks for deletable and movable.
+  return focused.isDeletable() && focused.isMovable();
 }

 /**
 * Determine if a focusable node can be cut.
 *
- * Unfortunately the ICopyable interface doesn't include an isCuttable
- * method, so we must use some other criteria to make the decision.
- * Specifically,
- *
- * - It must be an ICopyable.
- * - So that a pasted copy can be manipluated and/or disposed of, it
- *   must be both an IDraggable and an IDeletable.
- * - Additionally, both .isMovable() and .isDeletable() must return
- *   true (i.e., can currently be moved and deleted). This is the main
- *   difference with isCopyable.
- *
- * TODO(#9098): Revise these criteria.  The latter criteria prevents
- * shadow blocks from being copied; additionally, there are likely to
- * be other circumstances were it is desirable to allow movable /
- * copyable copies of a currently-unmovable / -copyable block to be
- * made.
+ * This will check if the node can be both copied and deleted in its current
+ * workspace.
 *
 * @param focused The focused object.
 */
 function isCuttable(focused: IFocusableNode): boolean {
-  if (!(focused instanceof BlockSvg)) return false;
-  return (
-    isICopyable(focused) &&
-    isIDeletable(focused) &&
-    focused.isDeletable() &&
-    isDraggable(focused) &&
-    focused.isMovable()
-  );
+  return isCopyable(focused) && isIDeletable(focused) && focused.isDeletable();
 }

 /**
@@ -185,7 +148,6 @@ export function registerCopy() {
    name: names.COPY,
    preconditionFn(workspace, scope) {
      const focused = scope.focusedNode;
-      if (!(focused instanceof BlockSvg)) return false;

      const targetWorkspace = workspace.isFlyout
        ? workspace.targetWorkspace
@@ -193,7 +155,6 @@ export function registerCopy() {
      return (
        !!focused &&
        !!targetWorkspace &&
-        !targetWorkspace.isReadOnly() &&
        !targetWorkspace.isDragging() &&
        !getFocusManager().ephemeralFocusTaken() &&
        isCopyable(focused)
@@ -205,21 +166,17 @@ export function registerCopy() {
      e.preventDefault();

      const focused = scope.focusedNode;
-      if (!focused || !isCopyable(focused)) return false;
-      let targetWorkspace: WorkspaceSvg | null =
-        focused.workspace instanceof WorkspaceSvg
-          ? focused.workspace
-          : workspace;
-      targetWorkspace = targetWorkspace.isFlyout
-        ? targetWorkspace.targetWorkspace
-        : targetWorkspace;
+      if (!focused || !isICopyable(focused) || !isCopyable(focused))
+        return false;
+      const targetWorkspace = workspace.isFlyout
+        ? workspace.targetWorkspace
+        : workspace;
      if (!targetWorkspace) return false;

      if (!focused.workspace.isFlyout) {
        targetWorkspace.hideChaff();
      }
      copyData = focused.toCopyData();
-      copyWorkspace = targetWorkspace;
      copyCoords =
        isDraggable(focused) && focused.workspace == targetWorkspace
          ? focused.getRelativeToSurfaceXY()
@@ -256,27 +213,20 @@ export function registerCut() {
    },
    callback(workspace, e, shortcut, scope) {
      const focused = scope.focusedNode;
+      if (!focused || !isCuttable(focused) || !isICopyable(focused)) {
+        return false;
+      }
+      copyData = focused.toCopyData();
+      copyCoords = isDraggable(focused)
+        ? focused.getRelativeToSurfaceXY()
+        : null;

      if (focused instanceof BlockSvg) {
-        copyData = focused.toCopyData();
-        copyWorkspace = workspace;
-        copyCoords = focused.getRelativeToSurfaceXY();
        focused.checkAndDelete();
-        return true;
-      } else if (
-        isIDeletable(focused) &&
-        focused.isDeletable() &&
-        isICopyable(focused)
-      ) {
-        copyData = focused.toCopyData();
-        copyWorkspace = workspace;
-        copyCoords = isDraggable(focused)
-          ? focused.getRelativeToSurfaceXY()
-          : null;
+      } else if (isIDeletable(focused)) {
        focused.dispose();
-        return true;
      }
-      return false;
+      return !!copyData;
    },
    keyCodes: [ctrlX, metaX],
  };
@@ -310,7 +260,11 @@ export function registerPaste() {
      );
    },
    callback(workspace: WorkspaceSvg, e: Event) {
-      if (!copyData || !copyWorkspace) return false;
+      if (!copyData) return false;
+      const targetWorkspace = workspace.isFlyout
+        ? workspace.targetWorkspace
+        : workspace;
+      if (!targetWorkspace || targetWorkspace.isReadOnly()) return false;

      if (e instanceof PointerEvent) {
        // The event that triggers a shortcut would conventionally be a KeyboardEvent.
@@ -319,19 +273,19 @@ export function registerPaste() {
        // at the mouse coordinates where the menu was opened, and this PointerEvent
        // is where the menu was opened.
        const mouseCoords = svgMath.screenToWsCoordinates(
-          copyWorkspace,
+          targetWorkspace,
          new Coordinate(e.clientX, e.clientY),
        );
-        return !!clipboard.paste(copyData, copyWorkspace, mouseCoords);
+        return !!clipboard.paste(copyData, targetWorkspace, mouseCoords);
      }

      if (!copyCoords) {
        // If we don't have location data about the original copyable, let the
        // paster determine position.
-        return !!clipboard.paste(copyData, copyWorkspace);
+        return !!clipboard.paste(copyData, targetWorkspace);
      }

-      const {left, top, width, height} = copyWorkspace
+      const {left, top, width, height} = targetWorkspace
        .getMetricsManager()
        .getViewMetrics(true);
      const viewportRect = new Rect(top, top + height, left, left + width);
@@ -339,12 +293,12 @@ export function registerPaste() {
      if (viewportRect.contains(copyCoords.x, copyCoords.y)) {
        // If the original copyable is inside the viewport, let the paster
        // determine position.
-        return !!clipboard.paste(copyData, copyWorkspace);
+        return !!clipboard.paste(copyData, targetWorkspace);
      }

      // Otherwise, paste in the middle of the viewport.
      const centerCoords = new Coordinate(left + width / 2, top + height / 2);
-      return !!clipboard.paste(copyData, copyWorkspace, centerCoords);
+      return !!clipboard.paste(copyData, targetWorkspace, centerCoords);
    },
    keyCodes: [ctrlV, metaV],
  };
@@ -390,12 +344,12 @@ export function registerUndo() {
 */
 export function registerRedo() {
  const ctrlShiftZ = ShortcutRegistry.registry.createSerializedKey(KeyCodes.Z, [
-    KeyCodes.SHIFT,
    KeyCodes.CTRL,
+    KeyCodes.SHIFT,
  ]);
  const metaShiftZ = ShortcutRegistry.registry.createSerializedKey(KeyCodes.Z, [
-    KeyCodes.SHIFT,
    KeyCodes.META,
+    KeyCodes.SHIFT,
  ]);
  // Ctrl-y is redo in Windows.  Command-y is never valid on Macs.
  const ctrlY = ShortcutRegistry.registry.createSerializedKey(KeyCodes.Y, [
--- a/core/workspace_svg.ts
+++ b/core/workspace_svg.ts
@@ -22,6 +22,7 @@ import type {Block} from './block.js';
 import type {BlockSvg} from './block_svg.js';
 import type {BlocklyOptions} from './blockly_options.js';
 import * as browserEvents from './browser_events.js';
+import {COMMENT_EDITOR_FOCUS_IDENTIFIER} from './comments/comment_editor.js';
 import {RenderedWorkspaceComment} from './comments/rendered_workspace_comment.js';
 import {WorkspaceComment} from './comments/workspace_comment.js';
 import * as common from './common.js';
@@ -41,6 +42,7 @@ import type {FlyoutButton} from './flyout_button.js';
 import {getFocusManager} from './focus_manager.js';
 import {Gesture} from './gesture.js';
 import {Grid} from './grid.js';
+import {MutatorIcon} from './icons/mutator_icon.js';
 import {isAutoHideable} from './interfaces/i_autohideable.js';
 import type {IBoundedElement} from './interfaces/i_bounded_element.js';
 import {IContextMenu} from './interfaces/i_contextmenu.js';
@@ -2680,7 +2682,7 @@ export class WorkspaceSvg

  /** See IFocusableNode.getFocusableTree. */
  getFocusableTree(): IFocusableTree {
-    return this;
+    return (this.isMutator && this.options.parentWorkspace) || this;
  }

  /** See IFocusableNode.onNodeFocus. */
@@ -2710,7 +2712,42 @@ export class WorkspaceSvg

  /** See IFocusableTree.getNestedTrees. */
  getNestedTrees(): Array<IFocusableTree> {
-    return [];
+    const nestedWorkspaces = this.getAllBlocks()
+      .map((block) => block.getIcons())
+      .flat()
+      .filter(
+        (icon): icon is MutatorIcon =>
+          icon instanceof MutatorIcon && icon.bubbleIsVisible(),
+      )
+      .map((icon) => icon.getBubble()?.getWorkspace())
+      .filter((workspace) => !!workspace);
+
+    const ownFlyout = this.getFlyout(true);
+    if (ownFlyout) {
+      nestedWorkspaces.push(ownFlyout.getWorkspace());
+    }
+
+    return nestedWorkspaces;
+  }
+
+  /**
+   * Used for searching for a specific workspace comment.
+   * We can't use this.getWorkspaceCommentById because the workspace
+   * comment ids might not be globally unique, but the id assigned to
+   * the focusable element for the comment should be.
+   */
+  private searchForWorkspaceComment(
+    id: string,
+  ): RenderedWorkspaceComment | undefined {
+    for (const comment of this.getTopComments()) {
+      if (
+        comment instanceof RenderedWorkspaceComment &&
+        comment.canBeFocused() &&
+        comment.getFocusableElement().id === id
+      ) {
+        return comment;
+      }
+    }
  }

  /** See IFocusableTree.lookUpFocusableNode. */
@@ -2757,21 +2794,29 @@ export class WorkspaceSvg
      return null;
    }

+    // Search for a specific workspace comment editor
+    // (only if id seems like it is one).
+    const commentEditorIndicator = id.indexOf(COMMENT_EDITOR_FOCUS_IDENTIFIER);
+    if (commentEditorIndicator !== -1) {
+      const commentId = id.substring(0, commentEditorIndicator);
+      const comment = this.searchForWorkspaceComment(commentId);
+      if (comment) {
+        return comment.getEditorFocusableNode();
+      }
+    }
+
    // Search for a specific block.
+    // Don't use `getBlockById` because the block ID is not guaranteeed
+    // to be globally unique, but the ID on the focusable element is.
    const block = this.getAllBlocks(false).find(
      (block) => block.getFocusableElement().id === id,
    );
    if (block) return block;

    // Search for a workspace comment (semi-expensive).
-    for (const comment of this.getTopComments()) {
-      if (
-        comment instanceof RenderedWorkspaceComment &&
-        comment.canBeFocused() &&
-        comment.getFocusableElement().id === id
-      ) {
-        return comment;
-      }
+    const comment = this.searchForWorkspaceComment(id);
+    if (comment) {
+      return comment;
    }

    // Search for icons and bubbles (which requires an expensive getAllBlocks).
--- a/msg/json/en.json
+++ b/msg/json/en.json
@@ -1,7 +1,7 @@
 {
 	"@metadata": {
 		"author": "Ellen Spertus <ellen.spertus@gmail.com>",
-		"lastupdated": "2025-04-21 10:42:10.549634",
+		"lastupdated": "2025-06-17 15:36:41.845826",
 		"locale": "en",
 		"messagedocumentation" : "qqq"
 	},
@@ -398,22 +398,8 @@
 	"COLLAPSED_WARNINGS_WARNING": "Collapsed blocks contain warnings.",
 	"DIALOG_OK": "OK",
 	"DIALOG_CANCEL": "Cancel",
-	"DELETE_SHORTCUT": "Delete block (%1)",
-	"DELETE_KEY": "Del",
-	"EDIT_BLOCK_CONTENTS": "Edit Block contents (%1)",
-	"INSERT_BLOCK": "Insert Block (%1)",
-	"START_MOVE": "Start move",
-	"FINISH_MOVE": "Finish move",
-	"ABORT_MOVE": "Abort move",
-	"MOVE_LEFT_CONSTRAINED": "Move left, constrained",
-	"MOVE_RIGHT_CONSTRAINED": "Move right constrained",
-	"MOVE_UP_CONSTRAINED": "Move up, constrained",
-	"MOVE_DOWN_CONSTRAINED": "Move down constrained",
-	"MOVE_LEFT_UNCONSTRAINED": "Move left, unconstrained",
-	"MOVE_RIGHT_UNCONSTRAINED": "Move right, unconstrained",
-	"MOVE_UP_UNCONSTRAINED": "Move up unconstrained",
-	"MOVE_DOWN_UNCONSTRAINED": "Move down, unconstrained",
-	"MOVE_BLOCK": "Move Block (%1)",
+	"EDIT_BLOCK_CONTENTS": "Edit Block contents",
+	"MOVE_BLOCK": "Move Block",
 	"WINDOWS": "Windows",
 	"MAC_OS": "macOS",
 	"CHROME_OS": "ChromeOS",
@@ -423,11 +409,15 @@
 	"COMMAND_KEY": "⌘ Command",
 	"OPTION_KEY": "⌥ Option",
 	"ALT_KEY": "Alt",
-	"CUT_SHORTCUT": "Cut (%1)",
-	"COPY_SHORTCUT": "Copy (%1)",
-	"PASTE_SHORTCUT": "Paste (%1)",
+	"CUT_SHORTCUT": "Cut",
+	"COPY_SHORTCUT": "Copy",
+	"PASTE_SHORTCUT": "Paste",
 	"HELP_PROMPT": "Press %1 for help on keyboard controls",
 	"SHORTCUTS_GENERAL": "General",
 	"SHORTCUTS_EDITING": "Editing",
-	"SHORTCUTS_CODE_NAVIGATION": "Code navigation"
+	"SHORTCUTS_CODE_NAVIGATION": "Code navigation",
+	"KEYBOARD_NAV_UNCONSTRAINED_MOVE_HINT": "Hold %1 and use arrow keys to move freely, then %2 to accept the position",
+	"KEYBOARD_NAV_CONSTRAINED_MOVE_HINT": "Use the arrow keys to move, then %1 to accept the position",
+	"KEYBOARD_NAV_COPIED_HINT": "Copied. Press %1 to paste.",
+	"KEYBOARD_NAV_CUT_HINT": "Cut. Press %1 to paste."
 }
--- a/msg/json/qqq.json
+++ b/msg/json/qqq.json
@@ -405,21 +405,7 @@
 	"COLLAPSED_WARNINGS_WARNING": "warning - This appears if the user collapses a block, and blocks inside that block have warnings attached to them. It should inform the user that the block they collapsed contains blocks that have warnings.",
 	"DIALOG_OK": "button label - Pressing this button closes help information.\n{{Identical|OK}}",
 	"DIALOG_CANCEL": "button label - Pressing this button cancels a proposed action.\n{{Identical|Cancel}}",
-	"DELETE_SHORTCUT": "menu label - Contextual menu item that deletes the focused block.",
-	"DELETE_KEY": "menu label - Keyboard shortcut for the Delete key, shown at the end of a menu item that deletes the focused block.",
 	"EDIT_BLOCK_CONTENTS": "menu label - Contextual menu item that moves the keyboard navigation cursor into a subitem of the focused block.",
-	"INSERT_BLOCK": "menu label - Contextual menu item that prompts the user to choose a block to insert into the program at the focused location.",
-	"START_MOVE": "keyboard shortcut label - Contextual menu item that starts a keyboard-driven move of the focused block.",
-	"FINISH_MOVE": "keyboard shortcut label - Contextual menu item that ends a keyboard-driven move of the focused block.",
-	"ABORT_MOVE": "keyboard shortcut label - Contextual menu item that ends a keyboard-drive move of the focused block by returning it to its original location.",
-	"MOVE_LEFT_CONSTRAINED": "keyboard shortcut label - Description of shortcut that moves a block to the next valid location to the left.",
-	"MOVE_RIGHT_CONSTRAINED": "keyboard shortcut label - Description of shortcut that moves a block to the next valid location to the right.",
-	"MOVE_UP_CONSTRAINED": "keyboard shortcut label - Description of shortcut that moves a block to the next valid location above it.",
-	"MOVE_DOWN_CONSTRAINED": "keyboard shortcut label - Description of shortcut that moves a block to the next valid location below it.",
-	"MOVE_LEFT_UNCONSTRAINED": "keyboard shortcut label - Description of shortcut that moves a block freely to the left.",
-	"MOVE_RIGHT_UNCONSTRAINED": "keyboard shortcut label - Description of shortcut that moves a block freely to the right.",
-	"MOVE_UP_UNCONSTRAINED": "keyboard shortcut label - Description of shortcut that moves a block freely upwards.",
-	"MOVE_DOWN_UNCONSTRAINED": "keyboard shortcut label - Description of shortcut that moves a block freely downwards.",
 	"MOVE_BLOCK": "menu label - Contextual menu item that starts a keyboard-driven block move.",
 	"WINDOWS": "Name of the Microsoft Windows operating system displayed in a list of keyboard shortcuts.",
 	"MAC_OS": "Name of the Apple macOS operating system displayed in a list of keyboard shortcuts,",
@@ -436,5 +422,9 @@
 	"HELP_PROMPT": "Alert message shown to prompt users to review available keyboard shortcuts.",
 	"SHORTCUTS_GENERAL": "shortcut list section header - Label for general purpose keyboard shortcuts.",
 	"SHORTCUTS_EDITING": "shortcut list section header - Label for keyboard shortcuts related to editing a workspace.",
-	"SHORTCUTS_CODE_NAVIGATION": "shortcut list section header - Label for keyboard shortcuts related to moving around the workspace."
+	"SHORTCUTS_CODE_NAVIGATION": "shortcut list section header - Label for keyboard shortcuts related to moving around the workspace.",
+	"KEYBOARD_NAV_UNCONSTRAINED_MOVE_HINT": "Message shown to inform users how to move blocks to arbitrary locations with the keyboard.",
+	"KEYBOARD_NAV_CONSTRAINED_MOVE_HINT": "Message shown to inform users how to move blocks with the keyboard.",
+	"KEYBOARD_NAV_COPIED_HINT": "Message shown when an item is copied in keyboard navigation mode.",
+	"KEYBOARD_NAV_CUT_HINT": "Message shown when an item is cut in keyboard navigation mode."
 }
--- a/msg/messages.js
+++ b/msg/messages.js
@@ -1618,68 +1618,13 @@ Blockly.Msg.DIALOG_OK = 'OK';
 /// button label - Pressing this button cancels a proposed action.\n{{Identical|Cancel}}
 Blockly.Msg.DIALOG_CANCEL = 'Cancel';

-/** @type {string} */
-/// menu label - Contextual menu item that deletes the focused block.
-Blockly.Msg.DELETE_SHORTCUT = 'Delete block (%1)';
-/** @type {string} */
-/// menu label - Keyboard shortcut for the Delete key, shown at the end of a
-/// menu item that deletes the focused block.
-Blockly.Msg.DELETE_KEY = 'Del';
 /** @type {string} */
 /// menu label - Contextual menu item that moves the keyboard navigation cursor
 /// into a subitem of the focused block.
-Blockly.Msg.EDIT_BLOCK_CONTENTS = 'Edit Block contents (%1)';
-/** @type {string} */
-/// menu label - Contextual menu item that prompts the user to choose a block to
-/// insert into the program at the focused location.
-Blockly.Msg.INSERT_BLOCK = 'Insert Block (%1)';
-/** @type {string} */
-/// keyboard shortcut label - Contextual menu item that starts a keyboard-driven 
-/// move of the focused block.
-Blockly.Msg.START_MOVE = 'Start move';
-/** @type {string} */
-/// keyboard shortcut label - Contextual menu item that ends a keyboard-driven
-/// move of the focused block.
-Blockly.Msg.FINISH_MOVE = 'Finish move';
-/** @type {string} */
-/// keyboard shortcut label - Contextual menu item that ends a keyboard-drive
-/// move of the focused block by returning it to its original location.
-Blockly.Msg.ABORT_MOVE = 'Abort move';
-/** @type {string} */
-/// keyboard shortcut label - Description of shortcut that moves a block to the
-/// next valid location to the left.
-Blockly.Msg.MOVE_LEFT_CONSTRAINED = 'Move left, constrained';
-/** @type {string} */
-/// keyboard shortcut label - Description of shortcut that moves a block to the
-/// next valid location to the right.
-Blockly.Msg.MOVE_RIGHT_CONSTRAINED = 'Move right constrained';
-/** @type {string} */
-/// keyboard shortcut label - Description of shortcut that moves a block to the
-/// next valid location above it.
-Blockly.Msg.MOVE_UP_CONSTRAINED = 'Move up, constrained';
-/** @type {string} */
-/// keyboard shortcut label - Description of shortcut that moves a block to the
-/// next valid location below it.
-Blockly.Msg.MOVE_DOWN_CONSTRAINED = 'Move down constrained';
-/** @type {string} */
-/// keyboard shortcut label - Description of shortcut that moves a block freely
-/// to the left.
-Blockly.Msg.MOVE_LEFT_UNCONSTRAINED = 'Move left, unconstrained';
-/** @type {string} */
-/// keyboard shortcut label - Description of shortcut that moves a block freely
-/// to the right.
-Blockly.Msg.MOVE_RIGHT_UNCONSTRAINED = 'Move right, unconstrained';
-/** @type {string} */
-/// keyboard shortcut label - Description of shortcut that moves a block freely
-/// upwards.
-Blockly.Msg.MOVE_UP_UNCONSTRAINED = 'Move up unconstrained';
-/** @type {string} */
-/// keyboard shortcut label - Description of shortcut that moves a block freely
-/// downwards.
-Blockly.Msg.MOVE_DOWN_UNCONSTRAINED = 'Move down, unconstrained';
+Blockly.Msg.EDIT_BLOCK_CONTENTS = 'Edit Block contents';
 /** @type {string} */
 /// menu label - Contextual menu item that starts a keyboard-driven block move.
-Blockly.Msg.MOVE_BLOCK = 'Move Block (%1)';
+Blockly.Msg.MOVE_BLOCK = 'Move Block';
 /** @type {string} */
 /// Name of the Microsoft Windows operating system displayed in a list of 
 /// keyboard shortcuts.
@@ -1714,13 +1659,13 @@ Blockly.Msg.OPTION_KEY = '⌥ Option';
 Blockly.Msg.ALT_KEY = 'Alt';
 /** @type {string} */
 /// menu label - Contextual menu item that cuts the focused item.
-Blockly.Msg.CUT_SHORTCUT = 'Cut (%1)';
+Blockly.Msg.CUT_SHORTCUT = 'Cut';
 /** @type {string} */
 /// menu label - Contextual menu item that copies the focused item.
-Blockly.Msg.COPY_SHORTCUT = 'Copy (%1)';
+Blockly.Msg.COPY_SHORTCUT = 'Copy';
 /** @type {string} */
 /// menu label - Contextual menu item that pastes the previously copied item.
-Blockly.Msg.PASTE_SHORTCUT = 'Paste (%1)';
+Blockly.Msg.PASTE_SHORTCUT = 'Paste';
 /** @type {string} */
 /// Alert message shown to prompt users to review available keyboard shortcuts.
 Blockly.Msg.HELP_PROMPT = 'Press %1 for help on keyboard controls';
@@ -1735,3 +1680,16 @@ Blockly.Msg.SHORTCUTS_EDITING = 'Editing'
 /// shortcut list section header - Label for keyboard shortcuts related to
 /// moving around the workspace.
 Blockly.Msg.SHORTCUTS_CODE_NAVIGATION = 'Code navigation';
+/** @type {string} */
+/// Message shown to inform users how to move blocks to arbitrary locations
+/// with the keyboard.
+Blockly.Msg.KEYBOARD_NAV_UNCONSTRAINED_MOVE_HINT = 'Hold %1 and use arrow keys to move freely, then %2 to accept the position';
+/** @type {string} */
+/// Message shown to inform users how to move blocks with the keyboard.
+Blockly.Msg.KEYBOARD_NAV_CONSTRAINED_MOVE_HINT = 'Use the arrow keys to move, then %1 to accept the position';
+/** @type {string} */
+/// Message shown when an item is copied in keyboard navigation mode.
+Blockly.Msg.KEYBOARD_NAV_COPIED_HINT = 'Copied. Press %1 to paste.';
+/** @type {string} */
+/// Message shown when an item is cut in keyboard navigation mode.
+Blockly.Msg.KEYBOARD_NAV_CUT_HINT = 'Cut. Press %1 to paste.';
--- a/package-lock.json
+++ b/package-lock.json
@@ -101,17 +101,17 @@
      }
    },
    "node_modules/@blockly/dev-tools": {
-      "version": "9.0.0",
-      "resolved": "https://registry.npmjs.org/@blockly/dev-tools/-/dev-tools-9.0.0.tgz",
-      "integrity": "sha512-c2JJbj5Q9mGdy0iUvE5OBOl1zmSMJrSokORgnmrhxGCiJ6QexPGCsi1QAn6uzpUtGKjhpnEAQ6+jX7ROZe7QQg==",
+      "version": "9.0.1",
+      "resolved": "https://registry.npmjs.org/@blockly/dev-tools/-/dev-tools-9.0.1.tgz",
+      "integrity": "sha512-OnY24Up00owts0VtOaokUmOQdzH+K1PNcr3LC3huwa9PO0TlKiXTq4V5OuIqBS++enyj93gXQ8PhvFGudkogTQ==",
      "dev": true,
      "license": "Apache-2.0",
      "dependencies": {
-        "@blockly/block-test": "^7.0.0",
-        "@blockly/theme-dark": "^8.0.0",
-        "@blockly/theme-deuteranopia": "^7.0.0",
-        "@blockly/theme-highcontrast": "^7.0.0",
-        "@blockly/theme-tritanopia": "^7.0.0",
+        "@blockly/block-test": "^7.0.1",
+        "@blockly/theme-dark": "^8.0.1",
+        "@blockly/theme-deuteranopia": "^7.0.1",
+        "@blockly/theme-highcontrast": "^7.0.1",
+        "@blockly/theme-tritanopia": "^7.0.1",
        "chai": "^4.2.0",
        "dat.gui": "^0.7.7",
        "lodash.assign": "^4.2.0",
@@ -127,9 +127,9 @@
      }
    },
    "node_modules/@blockly/dev-tools/node_modules/@blockly/block-test": {
-      "version": "7.0.0",
-      "resolved": "https://registry.npmjs.org/@blockly/block-test/-/block-test-7.0.0.tgz",
-      "integrity": "sha512-Y+Iwg1hHmOaqXveTOiZNXHH+jNBP+LC5L8ZxKKWeO8aB9DZD5G2hgApHfLaxeZzqnCl8zspvGnrrlFy9foEdWw==",
+      "version": "7.0.1",
+      "resolved": "https://registry.npmjs.org/@blockly/block-test/-/block-test-7.0.1.tgz",
+      "integrity": "sha512-w91ZZbpJDKGQJVO7gKqQaM17ffcsW1ktrnSTz/OpDw5R4H+1q05NgWO5gYzGPzLfFdvPcrkc0v00KhD4UG7BRA==",
      "dev": true,
      "license": "Apache 2.0",
      "engines": {
@@ -209,9 +209,9 @@
      }
    },
    "node_modules/@blockly/theme-dark": {
-      "version": "8.0.0",
-      "resolved": "https://registry.npmjs.org/@blockly/theme-dark/-/theme-dark-8.0.0.tgz",
-      "integrity": "sha512-Fq8ifjCwbJW305Su7SNBP8jXs4h1hp2EdQ9cMGOCr/racRIYfDRRBqjy0ZRLLqI7BsgZKxKy6Aa+OjgWEKeKfw==",
+      "version": "8.0.1",
+      "resolved": "https://registry.npmjs.org/@blockly/theme-dark/-/theme-dark-8.0.1.tgz",
+      "integrity": "sha512-0Di3WIUwCVQw7jK9myUf/J+4oHLADWc8YxeF40KQgGsyulVrVnYipwtBolj+wxq2xjxIkqgvctAN3BdvM4mynA==",
      "dev": true,
      "license": "Apache-2.0",
      "engines": {
@@ -222,9 +222,9 @@
      }
    },
    "node_modules/@blockly/theme-deuteranopia": {
-      "version": "7.0.0",
-      "resolved": "https://registry.npmjs.org/@blockly/theme-deuteranopia/-/theme-deuteranopia-7.0.0.tgz",
-      "integrity": "sha512-zKhlnD/AF3MR9+Rlwus3vAPq8gwCZaZ08VEupvz5b98mk36suRlIrQanM8HVLGcozxiEvUNrTNOGO5kj8PeTWA==",
+      "version": "7.0.1",
+      "resolved": "https://registry.npmjs.org/@blockly/theme-deuteranopia/-/theme-deuteranopia-7.0.1.tgz",
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+    },
    "node_modules/parse5": {
      "version": "7.2.1",
      "resolved": "https://registry.npmjs.org/parse5/-/parse5-7.2.1.tgz",
@@ -8254,9 +8211,9 @@
      }
    },
    "node_modules/prettier": {
-      "version": "3.3.3",
-      "resolved": "https://registry.npmjs.org/prettier/-/prettier-3.3.3.tgz",
-      "integrity": "sha512-i2tDNA0O5IrMO757lfrdQZCc2jPNDVntV0m/+4whiDfWaTKfMNgR7Qz0NAeGz/nRqF4m5/6CLzbP4/liHt12Ew==",
+      "version": "3.6.0",
+      "resolved": "https://registry.npmjs.org/prettier/-/prettier-3.6.0.tgz",
+      "integrity": "sha512-ujSB9uXHJKzM/2GBuE0hBOUgC77CN3Bnpqa+g80bkv3T3A93wL/xlzDATHhnhkzifz/UE2SNOvmbTz5hSkDlHw==",
      "dev": true,
      "license": "MIT",
      "bin": {
@@ -9186,12 +9143,6 @@
        "node": ">=0.3.1"
      }
    },
-    "node_modules/slashes": {
-      "version": "3.0.12",
-      "resolved": "https://registry.npmjs.org/slashes/-/slashes-3.0.12.tgz",
-      "integrity": "sha512-Q9VME8WyGkc7pJf6QEkj3wE+2CnvZMI+XJhwdTPR8Z/kWQRXi7boAWLDibRPyHRTUTPx5FaU7MsyrjI3yLB4HA==",
-      "dev": true
-    },
    "node_modules/smart-buffer": {
      "version": "4.2.0",
      "resolved": "https://registry.npmjs.org/smart-buffer/-/smart-buffer-4.2.0.tgz",
@@ -9566,31 +9517,25 @@
      "integrity": "sha512-9QNk5KwDF+Bvz+PyObkmSYjI5ksVUYtjW7AU22r2NKcfLJcXp96hkDWU3+XndOsUb+AQ9QhfzfCT2O+CNWT5Tw=="
    },
    "node_modules/synckit": {
-      "version": "0.9.2",
-      "resolved": "https://registry.npmjs.org/synckit/-/synckit-0.9.2.tgz",
-      "integrity": "sha512-vrozgXDQwYO72vHjUb/HnFbQx1exDjoKzqx23aXEg2a9VIg2TSFZ8FmeZpTjUCFMYw7mpX4BE2SFu8wI7asYsw==",
+      "version": "0.11.8",
+      "resolved": "https://registry.npmjs.org/synckit/-/synckit-0.11.8.tgz",
+      "integrity": "sha512-+XZ+r1XGIJGeQk3VvXhT6xx/VpbHsRzsTkGgF6E5RX9TTXD0118l87puaEBZ566FhqblC6U0d4XnubznJDm30A==",
      "dev": true,
+      "license": "MIT",
      "dependencies": {
-        "@pkgr/core": "^0.1.0",
-        "tslib": "^2.6.2"
+        "@pkgr/core": "^0.2.4"
      },
      "engines": {
        "node": "^14.18.0 || >=16.0.0"
      },
      "funding": {
-        "url": "https://opencollective.com/unts"
+        "url": "https://opencollective.com/synckit"
      }
    },
-    "node_modules/synckit/node_modules/tslib": {
-      "version": "2.8.1",
-      "resolved": "https://registry.npmjs.org/tslib/-/tslib-2.8.1.tgz",
-      "integrity": "sha512-oJFu94HQb+KVduSUQL7wnpmqnfmLsOA/nAh6b6EH0wCEoK0/mPeXU6c3wKDV83MkOuHPRHtSXKKU99IBazS/2w==",
-      "dev": true
-    },
    "node_modules/tar-fs": {
-      "version": "3.0.8",
-      "resolved": "https://registry.npmjs.org/tar-fs/-/tar-fs-3.0.8.tgz",
-      "integrity": "sha512-ZoROL70jptorGAlgAYiLoBLItEKw/fUxg9BSYK/dF/GAGYFJOJJJMvjPAKDJraCXFwadD456FCuvLWgfhMsPwg==",
+      "version": "3.0.9",
+      "resolved": "https://registry.npmjs.org/tar-fs/-/tar-fs-3.0.9.tgz",
+      "integrity": "sha512-XF4w9Xp+ZQgifKakjZYmFdkLoSWd34VGKcsTCwlNWM7QG3ZbaxnTsaBwnjFZqHRf/rROxaR8rXnbtwdvaDI+lA==",
      "dev": true,
      "license": "MIT",
      "dependencies": {
@@ -10357,10 +10302,11 @@
      }
    },
    "node_modules/workerpool": {
-      "version": "6.5.1",
-      "resolved": "https://registry.npmjs.org/workerpool/-/workerpool-6.5.1.tgz",
-      "integrity": "sha512-Fs4dNYcsdpYSAfVxhnl1L5zTksjvOJxtC5hzMNl+1t9B8hTJTdKDyZ5ju7ztgPy+ft9tBFXoOlDNiOT9WUXZlA==",
-      "dev": true
+      "version": "9.3.2",
+      "resolved": "https://registry.npmjs.org/workerpool/-/workerpool-9.3.2.tgz",
+      "integrity": "sha512-Xz4Nm9c+LiBHhDR5bDLnNzmj6+5F+cyEAWPMkbs2awq/dYazR/efelZzUAjB/y3kNHL+uzkHvxVVpaOfGCPV7A==",
+      "dev": true,
+      "license": "Apache-2.0"
    },
    "node_modules/wrap-ansi": {
      "version": "7.0.0",
--- a/tests/mocha/block_test.js
+++ b/tests/mocha/block_test.js
@@ -7,7 +7,10 @@
 import {ConnectionType} from '../../build/src/core/connection_type.js';
 import {EventType} from '../../build/src/core/events/type.js';
 import * as eventUtils from '../../build/src/core/events/utils.js';
+import {IconType} from '../../build/src/core/icons/icon_types.js';
 import {EndRowInput} from '../../build/src/core/inputs/end_row_input.js';
+import {isCommentIcon} from '../../build/src/core/interfaces/i_comment_icon.js';
+import {Size} from '../../build/src/core/utils/size.js';
 import {assert} from '../../node_modules/chai/chai.js';
 import {createRenderedBlock} from './test_helpers/block_definitions.js';
 import {
@@ -1426,9 +1429,9 @@ suite('Blocks', function () {
    });

    suite('Constructing registered comment classes', function () {
-      class MockComment extends MockIcon {
+      class MockComment extends MockBubbleIcon {
        getType() {
-          return Blockly.icons.IconType.COMMENT;
+          return IconType.COMMENT;
        }

        setText() {}
@@ -1440,19 +1443,13 @@ suite('Blocks', function () {
        setBubbleSize() {}

        getBubbleSize() {
-          return Blockly.utils.Size(0, 0);
+          return Size(0, 0);
        }

        setBubbleLocation() {}

        getBubbleLocation() {}

-        bubbleIsVisible() {
-          return true;
-        }
-
-        setBubbleVisible() {}
-
        saveState() {
          return {};
        }
@@ -1460,6 +1457,10 @@ suite('Blocks', function () {
        loadState() {}
      }

+      if (!isCommentIcon(new MockComment())) {
+        throw new TypeError('MockComment not an ICommentIcon');
+      }
+
      setup(function () {
        this.workspace = Blockly.inject('blocklyDiv', {});

--- a/tests/mocha/cursor_test.js
+++ b/tests/mocha/cursor_test.js
@@ -60,6 +60,33 @@ suite('Cursor', function () {
          'tooltip': '',
          'helpUrl': '',
        },
+        {
+          'type': 'multi_statement_input',
+          'message0': '%1 %2',
+          'args0': [
+            {
+              'type': 'input_statement',
+              'name': 'FIRST',
+            },
+            {
+              'type': 'input_statement',
+              'name': 'SECOND',
+            },
+          ],
+        },
+        {
+          'type': 'simple_statement',
+          'message0': '%1',
+          'args0': [
+            {
+              'type': 'field_input',
+              'name': 'NAME',
+              'text': 'default',
+            },
+          ],
+          'previousStatement': null,
+          'nextStatement': null,
+        },
      ]);
      this.workspace = Blockly.inject('blocklyDiv', {});
      this.cursor = this.workspace.getCursor();
@@ -145,6 +172,112 @@ suite('Cursor', function () {
      assert.equal(curNode, this.blocks.D.nextConnection);
    });
  });
+
+  suite('Multiple statement inputs', function () {
+    setup(function () {
+      sharedTestSetup.call(this);
+      Blockly.defineBlocksWithJsonArray([
+        {
+          'type': 'multi_statement_input',
+          'message0': '%1 %2',
+          'args0': [
+            {
+              'type': 'input_statement',
+              'name': 'FIRST',
+            },
+            {
+              'type': 'input_statement',
+              'name': 'SECOND',
+            },
+          ],
+        },
+        {
+          'type': 'simple_statement',
+          'message0': '%1',
+          'args0': [
+            {
+              'type': 'field_input',
+              'name': 'NAME',
+              'text': 'default',
+            },
+          ],
+          'previousStatement': null,
+          'nextStatement': null,
+        },
+      ]);
+      this.workspace = Blockly.inject('blocklyDiv', {});
+      this.cursor = this.workspace.getCursor();
+
+      this.multiStatement1 = createRenderedBlock(
+        this.workspace,
+        'multi_statement_input',
+      );
+      this.multiStatement2 = createRenderedBlock(
+        this.workspace,
+        'multi_statement_input',
+      );
+      this.firstStatement = createRenderedBlock(
+        this.workspace,
+        'simple_statement',
+      );
+      this.secondStatement = createRenderedBlock(
+        this.workspace,
+        'simple_statement',
+      );
+      this.thirdStatement = createRenderedBlock(
+        this.workspace,
+        'simple_statement',
+      );
+      this.fourthStatement = createRenderedBlock(
+        this.workspace,
+        'simple_statement',
+      );
+      this.multiStatement1
+        .getInput('FIRST')
+        .connection.connect(this.firstStatement.previousConnection);
+      this.firstStatement.nextConnection.connect(
+        this.secondStatement.previousConnection,
+      );
+      this.multiStatement1
+        .getInput('SECOND')
+        .connection.connect(this.thirdStatement.previousConnection);
+      this.multiStatement2
+        .getInput('FIRST')
+        .connection.connect(this.fourthStatement.previousConnection);
+    });
+
+    teardown(function () {
+      sharedTestTeardown.call(this);
+    });
+
+    test('In - from field in nested statement block to next nested statement block', function () {
+      this.cursor.setCurNode(this.secondStatement.getField('NAME'));
+      this.cursor.in();
+      const curNode = this.cursor.getCurNode();
+      assert.equal(curNode, this.thirdStatement);
+    });
+    test('In - from field in nested statement block to next stack', function () {
+      this.cursor.setCurNode(this.thirdStatement.getField('NAME'));
+      this.cursor.in();
+      const curNode = this.cursor.getCurNode();
+      assert.equal(curNode, this.multiStatement2);
+    });
+
+    test('Out - from nested statement block to last field of previous nested statement block', function () {
+      this.cursor.setCurNode(this.thirdStatement);
+      this.cursor.out();
+      const curNode = this.cursor.getCurNode();
+      assert.equal(curNode, this.secondStatement.getField('NAME'));
+    });
+
+    test('Out - from root block to last field of last nested statement block in previous stack', function () {
+      this.cursor.setCurNode(this.multiStatement2);
+      this.cursor.out();
+      const curNode = this.cursor.getCurNode();
+      assert.equal(curNode, this.thirdStatement.getField('NAME'));
+    });
+  });
+
  suite('Searching', function () {
    setup(function () {
      sharedTestSetup.call(this);
--- a/tests/mocha/shortcut_items_test.js
+++ b/tests/mocha/shortcut_items_test.js
@@ -47,6 +47,16 @@ suite('Keyboard Shortcut Items', function () {
      .returns(block.nextConnection);
  }

+  /**
+   * Creates a workspace comment and set it as the focused node.
+   * @param {Blockly.Workspace} workspace The workspace to create a new comment on.
+   */
+  function setSelectedComment(workspace) {
+    const comment = workspace.newComment();
+    sinon.stub(Blockly.getFocusManager(), 'getFocusedNode').returns(comment);
+    return comment;
+  }
+
  /**
   * Creates a test for not running keyDown events when the workspace is in read only mode.
   * @param {Object} keyEvent Mocked key down event. Use createKeyDownEvent.
@@ -173,12 +183,17 @@ suite('Keyboard Shortcut Items', function () {
        });
      });
    });
-    // Do not copy a block if a workspace is in readonly mode.
-    suite('Not called when readOnly is true', function () {
+    // Allow copying a block if a workspace is in readonly mode.
+    suite('Called when readOnly is true', function () {
      testCases.forEach(function (testCase) {
        const testCaseName = testCase[0];
        const keyEvent = testCase[1];
-        runReadOnlyTest(keyEvent, testCaseName);
+        test(testCaseName, function () {
+          this.workspace.setIsReadOnly(true);
+          this.injectionDiv.dispatchEvent(keyEvent);
+          sinon.assert.calledOnce(this.copySpy);
+          sinon.assert.calledOnce(this.hideChaffSpy);
+        });
      });
    });
    // Do not copy a block if a drag is in progress.
@@ -236,6 +251,152 @@ suite('Keyboard Shortcut Items', function () {
      sinon.assert.notCalled(this.copySpy);
      sinon.assert.notCalled(this.hideChaffSpy);
    });
+    // Copy a comment.
+    test('Workspace comment', function () {
+      testCases.forEach(function (testCase) {
+        const testCaseName = testCase[0];
+        const keyEvent = testCase[1];
+        test(testCaseName, function () {
+          Blockly.getFocusManager().getFocusedNode.restore();
+          this.comment = setSelectedComment(this.workspace);
+          this.copySpy = sinon.spy(this.comment, 'toCopyData');
+
+          this.injectionDiv.dispatchEvent(keyEvent);
+          sinon.assert.calledOnce(this.copySpy);
+          sinon.assert.calledOnce(this.hideChaffSpy);
+        });
+      });
+    });
+  });
+
+  suite('Cut', function () {
+    setup(function () {
+      this.block = setSelectedBlock(this.workspace);
+      this.copySpy = sinon.spy(this.block, 'toCopyData');
+      this.disposeSpy = sinon.spy(this.block, 'dispose');
+      this.hideChaffSpy = sinon.spy(
+        Blockly.WorkspaceSvg.prototype,
+        'hideChaff',
+      );
+    });
+    const testCases = [
+      [
+        'Control X',
+        createKeyDownEvent(Blockly.utils.KeyCodes.X, [
+          Blockly.utils.KeyCodes.CTRL,
+        ]),
+      ],
+      [
+        'Meta X',
+        createKeyDownEvent(Blockly.utils.KeyCodes.X, [
+          Blockly.utils.KeyCodes.META,
+        ]),
+      ],
+    ];
+    // Cut a block.
+    suite('Simple', function () {
+      testCases.forEach(function (testCase) {
+        const testCaseName = testCase[0];
+        const keyEvent = testCase[1];
+        test(testCaseName, function () {
+          this.injectionDiv.dispatchEvent(keyEvent);
+          sinon.assert.calledOnce(this.copySpy);
+          sinon.assert.calledOnce(this.disposeSpy);
+          sinon.assert.calledOnce(this.hideChaffSpy);
+        });
+      });
+    });
+    // Do not cut a block if a workspace is in readonly mode.
+    suite('Not called when readOnly is true', function () {
+      testCases.forEach(function (testCase) {
+        const testCaseName = testCase[0];
+        const keyEvent = testCase[1];
+        test(testCaseName, function () {
+          this.workspace.setIsReadOnly(true);
+          this.injectionDiv.dispatchEvent(keyEvent);
+          sinon.assert.notCalled(this.copySpy);
+          sinon.assert.notCalled(this.disposeSpy);
+          sinon.assert.notCalled(this.hideChaffSpy);
+        });
+      });
+    });
+    // Do not cut a block if a drag is in progress.
+    suite('Drag in progress', function () {
+      testCases.forEach(function (testCase) {
+        const testCaseName = testCase[0];
+        const keyEvent = testCase[1];
+        test(testCaseName, function () {
+          sinon.stub(this.workspace, 'isDragging').returns(true);
+          this.injectionDiv.dispatchEvent(keyEvent);
+          sinon.assert.notCalled(this.copySpy);
+          sinon.assert.notCalled(this.disposeSpy);
+          sinon.assert.notCalled(this.hideChaffSpy);
+        });
+      });
+    });
+    // Do not cut a block if is is not deletable.
+    suite('Block is not deletable', function () {
+      testCases.forEach(function (testCase) {
+        const testCaseName = testCase[0];
+        const keyEvent = testCase[1];
+        test(testCaseName, function () {
+          sinon
+            .stub(Blockly.common.getSelected(), 'isOwnDeletable')
+            .returns(false);
+          this.injectionDiv.dispatchEvent(keyEvent);
+          sinon.assert.notCalled(this.copySpy);
+          sinon.assert.notCalled(this.disposeSpy);
+          sinon.assert.notCalled(this.hideChaffSpy);
+        });
+      });
+    });
+    // Do not cut a block if it is not movable.
+    suite('Block is not movable', function () {
+      testCases.forEach(function (testCase) {
+        const testCaseName = testCase[0];
+        const keyEvent = testCase[1];
+        test(testCaseName, function () {
+          sinon
+            .stub(Blockly.common.getSelected(), 'isOwnMovable')
+            .returns(false);
+          this.injectionDiv.dispatchEvent(keyEvent);
+          sinon.assert.notCalled(this.copySpy);
+          sinon.assert.notCalled(this.disposeSpy);
+          sinon.assert.notCalled(this.hideChaffSpy);
+        });
+      });
+    });
+    test('Not called when connection is focused', function () {
+      // Restore the stub behavior called during setup
+      Blockly.getFocusManager().getFocusedNode.restore();
+
+      setSelectedConnection(this.workspace);
+      const event = createKeyDownEvent(Blockly.utils.KeyCodes.C, [
+        Blockly.utils.KeyCodes.CTRL,
+      ]);
+      this.injectionDiv.dispatchEvent(event);
+      sinon.assert.notCalled(this.copySpy);
+      sinon.assert.notCalled(this.disposeSpy);
+      sinon.assert.notCalled(this.hideChaffSpy);
+    });
+
+    // Cut a comment.
+    suite('Workspace comment', function () {
+      testCases.forEach(function (testCase) {
+        const testCaseName = testCase[0];
+        const keyEvent = testCase[1];
+        test(testCaseName, function () {
+          Blockly.getFocusManager().getFocusedNode.restore();
+          this.comment = setSelectedComment(this.workspace);
+          this.copySpy = sinon.spy(this.comment, 'toCopyData');
+          this.disposeSpy = sinon.spy(this.comment, 'dispose');
+
+          this.injectionDiv.dispatchEvent(keyEvent);
+          sinon.assert.calledOnce(this.copySpy);
+          sinon.assert.calledOnce(this.disposeSpy);
+        });
+      });
+    });
  });

  suite('Undo', function () {
--- a/tests/mocha/test_helpers/icon_mocks.js
+++ b/tests/mocha/test_helpers/icon_mocks.js
@@ -4,7 +4,24 @@
 * SPDX-License-Identifier: Apache-2.0
 */

-export class MockIcon {
+import {isFocusableNode} from '../../../build/src/core/interfaces/i_focusable_node.js';
+import {hasBubble} from '../../../build/src/core/interfaces/i_has_bubble.js';
+import {isIcon} from '../../../build/src/core/interfaces/i_icon.js';
+import {isSerializable} from '../../../build/src/core/interfaces/i_serializable.js';
+
+export class MockFocusable {
+  getFocusableElement() {}
+  getFocusableTree() {}
+  onNodeFocus() {}
+  onNodeBlur() {}
+  canBeFocused() {}
+}
+
+if (!isFocusableNode(new MockFocusable())) {
+  throw new TypeError('MockFocusable not an IFocuableNode');
+}
+
+export class MockIcon extends MockFocusable {
  getType() {
    return new Blockly.icons.IconType('mock icon');
  }
@@ -52,6 +69,10 @@ export class MockIcon {
  }
 }

+if (!isIcon(new MockIcon())) {
+  throw new TypeError('MockIcon not an IIcon');
+}
+
 export class MockSerializableIcon extends MockIcon {
  constructor() {
    super();
@@ -75,6 +96,10 @@ export class MockSerializableIcon extends MockIcon {
  }
 }

+if (!isSerializable(new MockSerializableIcon())) {
+  throw new TypeError('MockSerializableIcon not an ISerializable');
+}
+
 export class MockBubbleIcon extends MockIcon {
  constructor() {
    super();
@@ -94,4 +119,12 @@ export class MockBubbleIcon extends MockIcon {
  setBubbleVisible(visible) {
    this.visible = visible;
  }
+
+  getBubble() {
+    return null;
+  }
+}
+
+if (!hasBubble(new MockBubbleIcon())) {
+  throw new TypeError('MockBubbleIcon not an IHasBubble');
 }