feat: Beep when navigating across nesting levels (#9521)

core/block_svg.ts

@@ -1990,6 +1990,22 @@ export class BlockSvg
     return true;
   }
 
+  /**
+   * Returns how deeply nested this block is in parent C-shaped blocks.
+   *
+   * @internal
+   * @returns The nesting level of this block, starting at 0 for root blocks.
+   */
+  getNestingLevel(): number {
+    // Don't consider value blocks to be nested.
+    if (this.outputConnection) {
+      return this.getParent()?.getNestingLevel() ?? 0;
+    }
+
+    const surroundParent = this.getSurroundParent();
+    return surroundParent ? surroundParent.getNestingLevel() + 1 : 0;
+  }
+
   /**
    * Announces the current dynamic state of the specified block, if any.
    *

core/keyboard_nav/line_cursor.ts

@@ -542,6 +542,17 @@ export class LineCursor extends Marker {
    * @param newNode The new location of the cursor.
    */
   setCurNode(newNode: IFocusableNode) {
+    const oldBlock = this.getSourceBlock();
+    const newBlock = this.getSourceBlockFromNode(newNode);
+    if (
+      oldBlock &&
+      newBlock &&
+      oldBlock.getNestingLevel() !== newBlock.getNestingLevel()
+    ) {
+      newBlock.workspace
+        .getAudioManager()
+        .beep(400 + newBlock.getNestingLevel() * 40);
+    }
     getFocusManager().focusNode(newNode);
   }