ReactNativeFiberHostComponent Class — react Architecture

Source Code

packages/react-native-renderer/src/ReactNativeFiberHostComponent.js lines 31–88

class ReactNativeFiberHostComponent implements LegacyPublicInstance {
  _children: Array<Instance | number>;
  _nativeTag: number;
  _internalFiberInstanceHandleDEV: Object;
  viewConfig: ViewConfig;

  constructor(
    tag: number,
    viewConfig: ViewConfig,
    internalInstanceHandleDEV: Object,
  ) {
    this._nativeTag = tag;
    this._children = [];
    this.viewConfig = viewConfig;
    if (__DEV__) {
      this._internalFiberInstanceHandleDEV = internalInstanceHandleDEV;
    }
  }

  blur() {
    TextInputState.blurTextInput(this);
  }

  focus() {
    TextInputState.focusTextInput(this);
  }

  measure(callback: MeasureOnSuccessCallback) {
    UIManager.measure(
      this._nativeTag,
      mountSafeCallback_NOT_REALLY_SAFE(this, callback),
    );
  }

  measureInWindow(callback: MeasureInWindowOnSuccessCallback) {
    UIManager.measureInWindow(
      this._nativeTag,
      mountSafeCallback_NOT_REALLY_SAFE(this, callback),
    );
  }

  measureLayout(
    relativeToNativeNode: number | LegacyPublicInstance,
    onSuccess: MeasureLayoutOnSuccessCallback,
    onFail?: () => void /* currently unused */,
  ) {
    let relativeNode: ?number;

    if (typeof relativeToNativeNode === 'number') {
      // Already a node handle
      relativeNode = relativeToNativeNode;
    } else {
      const nativeNode: ReactNativeFiberHostComponent =
        (relativeToNativeNode: any);
      if (nativeNode._nativeTag) {
        relativeNode = nativeNode._nativeTag;
      }
    }