@daredrop/react-scroll/modules/mixins/scroll-link.js

A scroll component for React.js

'use strict';

Object.defineProperty(exports, "__esModule", {
  value: true
});

var _extends = Object.assign || function (target) { for (var i = 1; i < arguments.length; i++) { var source = arguments[i]; for (var key in source) { if (Object.prototype.hasOwnProperty.call(source, key)) { target[key] = source[key]; } } } return target; };

var _createClass = 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); } } return function (Constructor, protoProps, staticProps) { if (protoProps) defineProperties(Constructor.prototype, protoProps); if (staticProps) defineProperties(Constructor, staticProps); return Constructor; }; }();

var _react = require('react');

var _react2 = _interopRequireDefault(_react);

var _scrollSpy = require('./scroll-spy');

var _scrollSpy2 = _interopRequireDefault(_scrollSpy);

var _scroller = require('./scroller');

var _scroller2 = _interopRequireDefault(_scroller);

var _propTypes = require('prop-types');

var _propTypes2 = _interopRequireDefault(_propTypes);

var _scrollHash = require('./scroll-hash');

var _scrollHash2 = _interopRequireDefault(_scrollHash);

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

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

function _possibleConstructorReturn(self, call) { if (!self) { throw new ReferenceError("this hasn't been initialised - super() hasn't been called"); } return call && (typeof call === "object" || typeof call === "function") ? call : self; }

function _inherits(subClass, superClass) { if (typeof superClass !== "function" && superClass !== null) { throw new TypeError("Super expression must either be null or a function, not " + typeof superClass); } subClass.prototype = Object.create(superClass && superClass.prototype, { constructor: { value: subClass, enumerable: false, writable: true, configurable: true } }); if (superClass) Object.setPrototypeOf ? Object.setPrototypeOf(subClass, superClass) : subClass.__proto__ = superClass; }

var protoTypes = {
  to: _propTypes2.default.string.isRequired,
  containerId: _propTypes2.default.string,
  container: _propTypes2.default.object,
  activeClass: _propTypes2.default.string,
  spy: _propTypes2.default.bool,
  horizontal: _propTypes2.default.bool,
  smooth: _propTypes2.default.oneOfType([_propTypes2.default.bool, _propTypes2.default.string]),
  offset: _propTypes2.default.number,
  delay: _propTypes2.default.number,
  isDynamic: _propTypes2.default.bool,
  onClick: _propTypes2.default.func,
  duration: _propTypes2.default.oneOfType([_propTypes2.default.number, _propTypes2.default.func]),
  absolute: _propTypes2.default.bool,
  onSetActive: _propTypes2.default.func,
  onSetInactive: _propTypes2.default.func,
  ignoreCancelEvents: _propTypes2.default.bool,
  hashSpy: _propTypes2.default.bool,
  saveHashHistory: _propTypes2.default.bool,
  spyThrottle: _propTypes2.default.number
};

exports.default = function (Component, customScroller) {

  var scroller = customScroller || _scroller2.default;

  var Link = function (_React$PureComponent) {
    _inherits(Link, _React$PureComponent);

    function Link(props) {
      _classCallCheck(this, Link);

      var _this = _possibleConstructorReturn(this, (Link.__proto__ || Object.getPrototypeOf(Link)).call(this, props));

      _initialiseProps.call(_this);

      _this.state = {
        active: false
      };
      return _this;
    }

    _createClass(Link, [{
      key: 'getScrollSpyContainer',
      value: function getScrollSpyContainer() {
        var containerId = this.props.containerId;
        var container = this.props.container;

        if (containerId && !container) {
          return document.getElementById(containerId);
        }

        if (container && container.nodeType) {
          return container;
        }

        return document;
      }
    }, {
      key: 'componentDidMount',
      value: function componentDidMount() {
        if (this.props.spy || this.props.hashSpy) {
          var scrollSpyContainer = this.getScrollSpyContainer();

          if (!_scrollSpy2.default.isMounted(scrollSpyContainer)) {
            _scrollSpy2.default.mount(scrollSpyContainer, this.props.spyThrottle);
          }

          if (this.props.hashSpy) {
            if (!_scrollHash2.default.isMounted()) {
              _scrollHash2.default.mount(scroller);
            }
            _scrollHash2.default.mapContainer(this.props.to, scrollSpyContainer);
          }

          _scrollSpy2.default.addSpyHandler(this.spyHandler, scrollSpyContainer);

          this.setState({
            container: scrollSpyContainer
          });
        }
      }
    }, {
      key: 'componentWillUnmount',
      value: function componentWillUnmount() {
        _scrollSpy2.default.unmount(this.stateHandler, this.spyHandler);
      }
    }, {
      key: 'render',
      value: function render() {
        var className = "";

        if (this.state && this.state.active) {
          className = ((this.props.className || "") + " " + (this.props.activeClass || "active")).trim();
        } else {
          className = this.props.className;
        }

        var props = _extends({}, this.props);

        for (var prop in protoTypes) {
          if (props.hasOwnProperty(prop)) {
            delete props[prop];
          }
        }

        props.className = className;
        props.onClick = this.handleClick;

        return _react2.default.createElement(Component, props);
      }
    }]);

    return Link;
  }(_react2.default.PureComponent);

  var _initialiseProps = function _initialiseProps() {
    var _this2 = this;

    this.scrollTo = function (to, props) {
      scroller.scrollTo(to, _extends({}, _this2.state, props));
    };

    this.handleClick = function (event) {

      /*
       * give the posibility to override onClick
       */

      if (_this2.props.onClick) {
        _this2.props.onClick(event);
      }

      /*
       * dont bubble the navigation
       */

      if (event.stopPropagation) event.stopPropagation();
      if (event.preventDefault) event.preventDefault();

      /*
       * do the magic!
       */
      _this2.scrollTo(_this2.props.to, _this2.props);
    };

    this.spyHandler = function (x, y) {
      var scrollSpyContainer = _this2.getScrollSpyContainer();

      if (_scrollHash2.default.isMounted() && !_scrollHash2.default.isInitialized()) {
        return;
      }

      var horizontal = _this2.props.horizontal;

      var to = _this2.props.to;
      var element = null;
      var isInside = void 0;
      var isOutside = void 0;

      if (horizontal) {
        var elemLeftBound = 0;
        var elemRightBound = 0;
        var containerLeft = 0;

        if (scrollSpyContainer.getBoundingClientRect) {
          var containerCords = scrollSpyContainer.getBoundingClientRect();
          containerLeft = containerCords.left;
        }

        if (!element || _this2.props.isDynamic) {
          element = scroller.get(to);
          if (!element) {
            return;
          }

          var cords = element.getBoundingClientRect();
          elemLeftBound = cords.left - containerLeft + x;
          elemRightBound = elemLeftBound + cords.width;
        }

        var offsetX = x - _this2.props.offset;
        isInside = offsetX >= Math.floor(elemLeftBound) && offsetX < Math.floor(elemRightBound);
        isOutside = offsetX < Math.floor(elemLeftBound) || offsetX >= Math.floor(elemRightBound);
      } else {
        var elemTopBound = 0;
        var elemBottomBound = 0;
        var containerTop = 0;

        if (scrollSpyContainer.getBoundingClientRect) {
          var _containerCords = scrollSpyContainer.getBoundingClientRect();
          containerTop = _containerCords.top;
        }

        if (!element || _this2.props.isDynamic) {
          element = scroller.get(to);
          if (!element) {
            return;
          }

          var _cords = element.getBoundingClientRect();
          elemTopBound = _cords.top - containerTop + y;
          elemBottomBound = elemTopBound + _cords.height;
        }

        var offsetY = y - _this2.props.offset;
        isInside = offsetY >= Math.floor(elemTopBound) && offsetY < Math.floor(elemBottomBound);
        isOutside = offsetY < Math.floor(elemTopBound) || offsetY >= Math.floor(elemBottomBound);
      }

      var activeLink = scroller.getActiveLink();

      if (isOutside) {
        if (to === activeLink) {
          scroller.setActiveLink(void 0);
        }

        if (_this2.props.hashSpy && _scrollHash2.default.getHash() === to) {
          var _props$saveHashHistor = _this2.props.saveHashHistory,
              saveHashHistory = _props$saveHashHistor === undefined ? false : _props$saveHashHistor;

          _scrollHash2.default.changeHash("", saveHashHistory);
        }

        if (_this2.props.spy && _this2.state.active) {
          _this2.setState({ active: false });
          _this2.props.onSetInactive && _this2.props.onSetInactive(to, element);
        }
      }

      if (isInside && (activeLink !== to || _this2.state.active === false)) {
        scroller.setActiveLink(to);

        var _props$saveHashHistor2 = _this2.props.saveHashHistory,
            _saveHashHistory = _props$saveHashHistor2 === undefined ? false : _props$saveHashHistor2;

        _this2.props.hashSpy && _scrollHash2.default.changeHash(to, _saveHashHistory);

        if (_this2.props.spy) {
          _this2.setState({ active: true });
          _this2.props.onSetActive && _this2.props.onSetActive(to, element);
        }
      }
    };
  };

  ;

  Link.propTypes = protoTypes;

  Link.defaultProps = { offset: 0 };

  return Link;
};