getSemanticsData method

Implementation

SemanticsData getSemanticsData() {
  int flags = _flags;
  int actions = _actionsAsBits;
  String label = _label;
  String hint = _hint;
  String value = _value;
  String increasedValue = _increasedValue;
  String decreasedValue = _decreasedValue;
  TextDirection textDirection = _textDirection;
  Set<SemanticsTag> mergedTags = tags == null ? null : Set<SemanticsTag>.from(tags);
  TextSelection textSelection = _textSelection;
  int scrollChildCount = _scrollChildCount;
  int scrollIndex = _scrollIndex;
  double scrollPosition = _scrollPosition;
  double scrollExtentMax = _scrollExtentMax;
  double scrollExtentMin = _scrollExtentMin;
  final Set<int> customSemanticsActionIds = Set<int>();
  for (CustomSemanticsAction action in _customSemanticsActions.keys)
    customSemanticsActionIds.add(CustomSemanticsAction.getIdentifier(action));
  if (hintOverrides != null) {
    if (hintOverrides.onTapHint != null) {
      final CustomSemanticsAction action = CustomSemanticsAction.overridingAction(
        hint: hintOverrides.onTapHint,
        action: SemanticsAction.tap,
      );
      customSemanticsActionIds.add(CustomSemanticsAction.getIdentifier(action));
    }
    if (hintOverrides.onLongPressHint != null) {
      final CustomSemanticsAction action = CustomSemanticsAction.overridingAction(
        hint: hintOverrides.onLongPressHint,
        action: SemanticsAction.longPress,
      );
      customSemanticsActionIds.add(CustomSemanticsAction.getIdentifier(action));
    }
  }

  if (mergeAllDescendantsIntoThisNode) {
    _visitDescendants((SemanticsNode node) {
      assert(node.isMergedIntoParent);
      flags |= node._flags;
      actions |= node._actionsAsBits;
      textDirection ??= node._textDirection;
      textSelection ??= node._textSelection;
      scrollChildCount ??= node._scrollChildCount;
      scrollIndex ??= node._scrollIndex;
      scrollPosition ??= node._scrollPosition;
      scrollExtentMax ??= node._scrollExtentMax;
      scrollExtentMin ??= node._scrollExtentMin;
      if (value == '' || value == null)
        value = node._value;
      if (increasedValue == '' || increasedValue == null)
        increasedValue = node._increasedValue;
      if (decreasedValue == '' || decreasedValue == null)
        decreasedValue = node._decreasedValue;
      if (node.tags != null) {
        mergedTags ??= Set<SemanticsTag>();
        mergedTags.addAll(node.tags);
      }
      if (node._customSemanticsActions != null) {
        for (CustomSemanticsAction action in _customSemanticsActions.keys)
          customSemanticsActionIds.add(CustomSemanticsAction.getIdentifier(action));
      }
      if (node.hintOverrides != null) {
        if (node.hintOverrides.onTapHint != null) {
          final CustomSemanticsAction action = CustomSemanticsAction.overridingAction(
            hint: node.hintOverrides.onTapHint,
            action: SemanticsAction.tap,
          );
          customSemanticsActionIds.add(CustomSemanticsAction.getIdentifier(action));
        }
        if (node.hintOverrides.onLongPressHint != null) {
          final CustomSemanticsAction action = CustomSemanticsAction.overridingAction(
            hint: node.hintOverrides.onLongPressHint,
            action: SemanticsAction.longPress,
          );
          customSemanticsActionIds.add(CustomSemanticsAction.getIdentifier(action));
        }
      }
      label = _concatStrings(
        thisString: label,
        thisTextDirection: textDirection,
        otherString: node._label,
        otherTextDirection: node._textDirection,
      );
      hint = _concatStrings(
        thisString: hint,
        thisTextDirection: textDirection,
        otherString: node._hint,
        otherTextDirection: node._textDirection,
      );
      return true;
    });
  }

  return SemanticsData(
    flags: flags,
    actions: actions,
    label: label,
    value: value,
    increasedValue: increasedValue,
    decreasedValue: decreasedValue,
    hint: hint,
    textDirection: textDirection,
    rect: rect,
    transform: transform,
    tags: mergedTags,
    textSelection: textSelection,
    scrollChildCount: scrollChildCount,
    scrollIndex: scrollIndex,
    scrollPosition: scrollPosition,
    scrollExtentMax: scrollExtentMax,
    scrollExtentMin: scrollExtentMin,
    customSemanticsActionIds: customSemanticsActionIds.toList()..sort(),
  );
}