function updateClassComponent()

in Libraries/Renderer/implementations/ReactNativeRenderer-prod.js [4316:4517]

• 202 lines of code
• 66 McCabe index (conditional complexity)

function updateClassComponent(
  current,
  workInProgress,
  Component,
  nextProps,
  renderLanes
) {
  if (isContextProvider(Component)) {
    var hasContext = !0;
    pushContextProvider(workInProgress);
  } else hasContext = !1;
  prepareToReadContext(workInProgress, renderLanes);
  if (null === workInProgress.stateNode)
    null !== current &&
      ((current.alternate = null),
      (workInProgress.alternate = null),
      (workInProgress.flags |= 2)),
      constructClassInstance(workInProgress, Component, nextProps),
      mountClassInstance(workInProgress, Component, nextProps, renderLanes),
      (nextProps = !0);
  else if (null === current) {
    var instance = workInProgress.stateNode,
      oldProps = workInProgress.memoizedProps;
    instance.props = oldProps;
    var oldContext = instance.context,
      contextType = Component.contextType;
    "object" === typeof contextType && null !== contextType
      ? (contextType = readContext(contextType))
      : ((contextType = isContextProvider(Component)
          ? previousContext
          : contextStackCursor.current),
        (contextType = getMaskedContext(workInProgress, contextType)));
    var getDerivedStateFromProps = Component.getDerivedStateFromProps,
      hasNewLifecycles =
        "function" === typeof getDerivedStateFromProps ||
        "function" === typeof instance.getSnapshotBeforeUpdate;
    hasNewLifecycles ||
      ("function" !== typeof instance.UNSAFE_componentWillReceiveProps &&
        "function" !== typeof instance.componentWillReceiveProps) ||
      ((oldProps !== nextProps || oldContext !== contextType) &&
        callComponentWillReceiveProps(
          workInProgress,
          instance,
          nextProps,
          contextType
        ));
    hasForceUpdate = !1;
    var oldState = workInProgress.memoizedState;
    instance.state = oldState;
    processUpdateQueue(workInProgress, nextProps, instance, renderLanes);
    oldContext = workInProgress.memoizedState;
    oldProps !== nextProps ||
    oldState !== oldContext ||
    didPerformWorkStackCursor.current ||
    hasForceUpdate
      ? ("function" === typeof getDerivedStateFromProps &&
          (applyDerivedStateFromProps(
            workInProgress,
            Component,
            getDerivedStateFromProps,
            nextProps
          ),
          (oldContext = workInProgress.memoizedState)),
        (oldProps =
          hasForceUpdate ||
          checkShouldComponentUpdate(
            workInProgress,
            Component,
            oldProps,
            nextProps,
            oldState,
            oldContext,
            contextType
          ))
          ? (hasNewLifecycles ||
              ("function" !== typeof instance.UNSAFE_componentWillMount &&
                "function" !== typeof instance.componentWillMount) ||
              ("function" === typeof instance.componentWillMount &&
                instance.componentWillMount(),
              "function" === typeof instance.UNSAFE_componentWillMount &&
                instance.UNSAFE_componentWillMount()),
            "function" === typeof instance.componentDidMount &&
              (workInProgress.flags |= 4))
          : ("function" === typeof instance.componentDidMount &&
              (workInProgress.flags |= 4),
            (workInProgress.memoizedProps = nextProps),
            (workInProgress.memoizedState = oldContext)),
        (instance.props = nextProps),
        (instance.state = oldContext),
        (instance.context = contextType),
        (nextProps = oldProps))
      : ("function" === typeof instance.componentDidMount &&
          (workInProgress.flags |= 4),
        (nextProps = !1));
  } else {
    instance = workInProgress.stateNode;
    cloneUpdateQueue(current, workInProgress);
    oldProps = workInProgress.memoizedProps;
    contextType =
      workInProgress.type === workInProgress.elementType
        ? oldProps
        : resolveDefaultProps(workInProgress.type, oldProps);
    instance.props = contextType;
    hasNewLifecycles = workInProgress.pendingProps;
    oldState = instance.context;
    oldContext = Component.contextType;
    "object" === typeof oldContext && null !== oldContext
      ? (oldContext = readContext(oldContext))
      : ((oldContext = isContextProvider(Component)
          ? previousContext
          : contextStackCursor.current),
        (oldContext = getMaskedContext(workInProgress, oldContext)));
    var getDerivedStateFromProps$jscomp$0 = Component.getDerivedStateFromProps;
    (getDerivedStateFromProps =
      "function" === typeof getDerivedStateFromProps$jscomp$0 ||
      "function" === typeof instance.getSnapshotBeforeUpdate) ||
      ("function" !== typeof instance.UNSAFE_componentWillReceiveProps &&
        "function" !== typeof instance.componentWillReceiveProps) ||
      ((oldProps !== hasNewLifecycles || oldState !== oldContext) &&
        callComponentWillReceiveProps(
          workInProgress,
          instance,
          nextProps,
          oldContext
        ));
    hasForceUpdate = !1;
    oldState = workInProgress.memoizedState;
    instance.state = oldState;
    processUpdateQueue(workInProgress, nextProps, instance, renderLanes);
    var newState = workInProgress.memoizedState;
    oldProps !== hasNewLifecycles ||
    oldState !== newState ||
    didPerformWorkStackCursor.current ||
    hasForceUpdate
      ? ("function" === typeof getDerivedStateFromProps$jscomp$0 &&
          (applyDerivedStateFromProps(
            workInProgress,
            Component,
            getDerivedStateFromProps$jscomp$0,
            nextProps
          ),
          (newState = workInProgress.memoizedState)),
        (contextType =
          hasForceUpdate ||
          checkShouldComponentUpdate(
            workInProgress,
            Component,
            contextType,
            nextProps,
            oldState,
            newState,
            oldContext
          ) ||
          !1)
          ? (getDerivedStateFromProps ||
              ("function" !== typeof instance.UNSAFE_componentWillUpdate &&
                "function" !== typeof instance.componentWillUpdate) ||
              ("function" === typeof instance.componentWillUpdate &&
                instance.componentWillUpdate(nextProps, newState, oldContext),
              "function" === typeof instance.UNSAFE_componentWillUpdate &&
                instance.UNSAFE_componentWillUpdate(
                  nextProps,
                  newState,
                  oldContext
                )),
            "function" === typeof instance.componentDidUpdate &&
              (workInProgress.flags |= 4),
            "function" === typeof instance.getSnapshotBeforeUpdate &&
              (workInProgress.flags |= 512))
          : ("function" !== typeof instance.componentDidUpdate ||
              (oldProps === current.memoizedProps &&
                oldState === current.memoizedState) ||
              (workInProgress.flags |= 4),
            "function" !== typeof instance.getSnapshotBeforeUpdate ||
              (oldProps === current.memoizedProps &&
                oldState === current.memoizedState) ||
              (workInProgress.flags |= 512),
            (workInProgress.memoizedProps = nextProps),
            (workInProgress.memoizedState = newState)),
        (instance.props = nextProps),
        (instance.state = newState),
        (instance.context = oldContext),
        (nextProps = contextType))
      : ("function" !== typeof instance.componentDidUpdate ||
          (oldProps === current.memoizedProps &&
            oldState === current.memoizedState) ||
          (workInProgress.flags |= 4),
        "function" !== typeof instance.getSnapshotBeforeUpdate ||
          (oldProps === current.memoizedProps &&
            oldState === current.memoizedState) ||
          (workInProgress.flags |= 512),
        (nextProps = !1));
  }
  return finishClassComponent(
    current,
    workInProgress,
    Component,
    nextProps,
    hasContext,
    renderLanes
  );
}