@elissaioskon/scrollable-list/dist/components/ScrollView/index.js

Scroll to an element within a list easily 😃

"use strict";

Object.defineProperty(exports, "__esModule", {
  value: true
});
exports["default"] = exports.ScrollContext = void 0;

var _react = _interopRequireWildcard(require("react"));

var _propTypes = _interopRequireDefault(require("prop-types"));

function _interopRequireDefault(obj) { return obj && obj.__esModule ? obj : { "default": obj }; }

function _interopRequireWildcard(obj) { if (obj && obj.__esModule) { return obj; } else { var newObj = {}; if (obj != null) { for (var key in obj) { if (Object.prototype.hasOwnProperty.call(obj, key)) { var desc = Object.defineProperty && Object.getOwnPropertyDescriptor ? Object.getOwnPropertyDescriptor(obj, key) : {}; if (desc.get || desc.set) { Object.defineProperty(newObj, key, desc); } else { newObj[key] = obj[key]; } } } } newObj["default"] = obj; return newObj; } }

function _typeof(obj) { if (typeof Symbol === "function" && typeof Symbol.iterator === "symbol") { _typeof = function _typeof(obj) { return typeof obj; }; } else { _typeof = function _typeof(obj) { return obj && typeof Symbol === "function" && obj.constructor === Symbol && obj !== Symbol.prototype ? "symbol" : typeof obj; }; } return _typeof(obj); }

function _classCallCheck(instance, Constructor) { if (!(instance instanceof Constructor)) { throw new TypeError("Cannot call a class as a function"); } }

function _defineProperties(target, props) { for (var i = 0; i < props.length; i++) { var descriptor = props[i]; descriptor.enumerable = descriptor.enumerable || false; descriptor.configurable = true; if ("value" in descriptor) descriptor.writable = true; Object.defineProperty(target, descriptor.key, descriptor); } }

function _createClass(Constructor, protoProps, staticProps) { if (protoProps) _defineProperties(Constructor.prototype, protoProps); if (staticProps) _defineProperties(Constructor, staticProps); return Constructor; }

function _possibleConstructorReturn(self, call) { if (call && (_typeof(call) === "object" || typeof call === "function")) { return call; } return _assertThisInitialized(self); }

function _getPrototypeOf(o) { _getPrototypeOf = Object.setPrototypeOf ? Object.getPrototypeOf : function _getPrototypeOf(o) { return o.__proto__ || Object.getPrototypeOf(o); }; return _getPrototypeOf(o); }

function _assertThisInitialized(self) { if (self === void 0) { throw new ReferenceError("this hasn't been initialised - super() hasn't been called"); } return self; }

function _inherits(subClass, superClass) { if (typeof superClass !== "function" && superClass !== null) { throw new TypeError("Super expression must either be null or a function"); } subClass.prototype = Object.create(superClass && superClass.prototype, { constructor: { value: subClass, writable: true, configurable: true } }); if (superClass) _setPrototypeOf(subClass, superClass); }

function _setPrototypeOf(o, p) { _setPrototypeOf = Object.setPrototypeOf || function _setPrototypeOf(o, p) { o.__proto__ = p; return o; }; return _setPrototypeOf(o, p); }

function _defineProperty(obj, key, value) { if (key in obj) { Object.defineProperty(obj, key, { value: value, enumerable: true, configurable: true, writable: true }); } else { obj[key] = value; } return obj; }

var ScrollContext = _react["default"].createContext();

exports.ScrollContext = ScrollContext;

var noop = function noop() {};

var ScrollView =
/*#__PURE__*/
function (_Component) {
  _inherits(ScrollView, _Component);

  function ScrollView() {
    var _getPrototypeOf2;

    var _this;

    _classCallCheck(this, ScrollView);

    for (var _len = arguments.length, args = new Array(_len), _key = 0; _key < _len; _key++) {
      args[_key] = arguments[_key];
    }

    _this = _possibleConstructorReturn(this, (_getPrototypeOf2 = _getPrototypeOf(ScrollView)).call.apply(_getPrototypeOf2, [this].concat(args)));

    _defineProperty(_assertThisInitialized(_this), "scrollToIndex", function (index, cb) {
      _this.registeredElements[index].scrollIntoView();

      if (cb) {
        cb(index);
      }
    });

    _defineProperty(_assertThisInitialized(_this), "scrollToPreviousItem", function (currentIndex) {
      var cb = arguments.length > 1 && arguments[1] !== undefined ? arguments[1] : noop;
      var previousIndex = currentIndex - 1;
      if (previousIndex < 0) return;

      _this.scrollToIndex(previousIndex);

      cb(previousIndex);
    });

    _defineProperty(_assertThisInitialized(_this), "scrollToNextItem", function (currentIndex) {
      var cb = arguments.length > 1 && arguments[1] !== undefined ? arguments[1] : noop;
      var nextIndex = currentIndex + 1;
      if (nextIndex > _this.registeredElements.length - 1) return;

      _this.scrollToIndex(nextIndex);

      cb(nextIndex);
    });

    _defineProperty(_assertThisInitialized(_this), "scroll", {
      toIndex: _this.scrollToIndex,
      toNextItem: _this.scrollToNextItem,
      toPreviousItem: _this.scrollToPreviousItem
    });

    _defineProperty(_assertThisInitialized(_this), "registeredElements", []);

    _defineProperty(_assertThisInitialized(_this), "unregister", function (index) {
      delete _this.registeredElements[index];
    });

    _defineProperty(_assertThisInitialized(_this), "register", function (index, elementRef) {
      _this.registeredElements[index] = elementRef;
    });

    _defineProperty(_assertThisInitialized(_this), "scrollContextValue", {
      scroll: {
        register: _this.register,
        unregister: _this.unregister
      }
    });

    return _this;
  }

  _createClass(ScrollView, [{
    key: "render",
    value: function render() {
      return _react["default"].createElement(ScrollContext.Provider, {
        value: this.scrollContextValue
      }, this.props.children);
    }
  }]);

  return ScrollView;
}(_react.Component);

exports["default"] = ScrollView;

_defineProperty(ScrollView, "propTypes", {
  children: _propTypes["default"].element.isRequired
});

ScrollContext.Provider.propTypes = {
  value: _propTypes["default"].shape({
    scroll: _propTypes["default"].shape({
      register: _propTypes["default"].func.isRequired,
      unregister: _propTypes["default"].func.isRequired
    }).isRequired
  }).isRequired
};