fix: remove redundant labels for child blocks of parent input (#9967)

* fix: remove redundant labels for child blocks of parent input

* chore: make new argument optional

packages/blockly/core/block_aria_composer.ts

@@ -205,6 +205,9 @@ export function computeFieldRowLabel(
  * wrapped in the "Begin %1" prefix so the readout indicates that the child
  * block starts the body of the statement input.
  *
+ * Labels for child blocks of inputs are excluded because they are included
+ * with {@link getInputLabels} already.
+ *
  * @internal
  * @param block The block to generate a parent input label for.
  * @returns A description of the block's parent statement input, or undefined
@@ -242,6 +245,7 @@ function getParentInputLabel(block: BlockSvg) {
     const sectionLabels = getInputLabelsSubset(
       parentBlock as BlockSvg,
       parentInput,
+      false, // Exclude labels from child blocks.
     );
     if (!sectionLabels.length) {
       return undefined;
@@ -338,17 +342,23 @@ export function getInputLabels(
  *
  * @internal
  * @param block The block to retrieve a list of field/input labels for.
- * @param input The input that defines the end of the subset.
+ * @param endInput The input that defines the end of the subset.
+ * @param includeEndInputChildren Whether to include labels for child blocks
+ *    connected to the end input.
  * @returns A list of field/input labels for the given block.
  */
-export function getInputLabelsSubset(block: BlockSvg, input: Input): string[] {
-  const inputIndex = block.inputList.indexOf(input);
+export function getInputLabelsSubset(
+  block: BlockSvg,
+  endInput: Input,
+  includeEndInputChildren: boolean,
+): string[] {
+  const inputIndex = block.inputList.indexOf(endInput);
   if (inputIndex === -1) {
     throw new Error(
-      `Input with name "${input.name}" not found on block with id "${block.id}".`,
+      `Input with name "${endInput.name}" not found on block with id "${block.id}".`,
     );
   }
-  const isStatementTarget = input.type === inputTypes.STATEMENT;
+  const isStatementTarget = endInput.type === inputTypes.STATEMENT;
 
   const startIndex = isStatementTarget
     ? findStartOfStatementSection(block.inputList, inputIndex)
@@ -362,9 +372,13 @@ export function getInputLabelsSubset(block: BlockSvg, input: Input): string[] {
     .filter((subsetInput) => subsetInput.isVisible());
 
   // The derived labels are based on the field row and any connected child
-  // blocks.
+  // blocks. Labels for child blocks are potentially skipped if they would be
+  // redundant within the overall block label.
   const derivedLabels = inputsInSubset.map((subsetInput) =>
-    subsetInput.getLabel(Verbosity.TERSE),
+    subsetInput.getLabel(
+      Verbosity.TERSE,
+      subsetInput !== endInput || includeEndInputChildren,
+    ),
   );
 
   // For statement inputs, we only include the fallback label ("input %1")
@@ -529,7 +543,7 @@ function computeMoveConnectionLabel(
   let inputLabel = input.getAriaLabelText();
 
   if (!inputLabel) {
-    const labels = getInputLabelsSubset(conn.getSourceBlock(), input);
+    const labels = getInputLabelsSubset(conn.getSourceBlock(), input, true);
     if (!labels.length) return baseLabel;
 
     inputLabel = labels.join(', ');

packages/blockly/core/inputs/input.ts

@@ -400,18 +400,21 @@ export class Input {
 
   /**
    * Returns a derived accessibility label for this input: field row text plus
-   * labels of any connected child blocks. Does not include custom labels from
-   * {@link getAriaLabelText}; those are used in move-mode and parent-input
-   * context only.
+   * labels of any connected child blocks (unless excluded). Does not include
+   * custom labels from {@link getAriaLabelText}; those are used in move-mode
+   * and parent-input context only.
    *
    * @internal
    */
-  getLabel(verbosity = Verbosity.STANDARD): string {
+  getLabel(verbosity = Verbosity.STANDARD, includeChildren = true): string {
     if (!this.isVisible()) return '';
 
     const labels = computeFieldRowLabel(this, false, verbosity);
 
-    if (this.connection?.type === ConnectionType.INPUT_VALUE) {
+    if (
+      includeChildren &&
+      this.connection?.type === ConnectionType.INPUT_VALUE
+    ) {
       const childBlock = this.connection.targetBlock();
       if (childBlock && !childBlock.isInsertionMarker()) {
         labels.push(

packages/blockly/core/rendered_connection.ts

@@ -360,6 +360,7 @@ export class RenderedConnection
       getInputLabelsSubset(
         parentInput.getSourceBlock() as BlockSvg,
         parentInput,
+        true,
       ).join(', ');
     if (this.type === ConnectionType.NEXT_STATEMENT) {
       aria.setState(