@applicaster/zapp-react-native-ui-components/Contexts/ScreenScrollingContext/index.js

Applicaster Zapp React Native ui components for the Quick Brick App

import * as R from "ramda";
import { createContext } from "@applicaster/zapp-react-native-utils/reactUtils/createContext";

// Updates main focus offset after item was focused
const UPDATE_MAIN_OFFSET_FUNC = "mainOffsetUpdater";
// Updates main screen focus item
const UPDATE_MAIN_SCREEN_FOCUS_FUNC = "mainFocusItemUpdater";

function noop() {}

const initialContext = {
  mainOffsetUpdater: noop,
  mainFocusItemUpdater: noop,
};

function stateValidator({ property, value }) {
  if (property === UPDATE_MAIN_OFFSET_FUNC) {
    return R.is(Function, value);
  }

  if (property === UPDATE_MAIN_SCREEN_FOCUS_FUNC) {
    return R.is(Function, value);
  }

  return false;
}

export const ScreenScrollingContext = createContext(
  initialContext,
  stateValidator
);