iep-ui/lib/vc-util/Dom/resize-event.js

An enterprise-class UI design language and Vue-based implementation

'use strict';

Object.defineProperty(exports, "__esModule", {
  value: true
});
exports.removeResizeListener = exports.addResizeListener = undefined;

var _resizeObserverPolyfill = require('resize-observer-polyfill');

var _resizeObserverPolyfill2 = _interopRequireDefault(_resizeObserverPolyfill);

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

var isServer = typeof window === 'undefined';

/* istanbul ignore next */
var resizeHandler = function resizeHandler(entries) {
  var _iteratorNormalCompletion = true;
  var _didIteratorError = false;
  var _iteratorError = undefined;

  try {
    for (var _iterator = entries[Symbol.iterator](), _step; !(_iteratorNormalCompletion = (_step = _iterator.next()).done); _iteratorNormalCompletion = true) {
      var entry = _step.value;

      var listeners = entry.target.__resizeListeners__ || [];
      if (listeners.length) {
        listeners.forEach(function (fn) {
          fn();
        });
      }
    }
  } catch (err) {
    _didIteratorError = true;
    _iteratorError = err;
  } finally {
    try {
      if (!_iteratorNormalCompletion && _iterator['return']) {
        _iterator['return']();
      }
    } finally {
      if (_didIteratorError) {
        throw _iteratorError;
      }
    }
  }
};

/* istanbul ignore next */
var addResizeListener = exports.addResizeListener = function addResizeListener(element, fn) {
  if (isServer) return;
  if (!element.__resizeListeners__) {
    element.__resizeListeners__ = [];
    element.__ro__ = new _resizeObserverPolyfill2['default'](resizeHandler);
    element.__ro__.observe(element);
  }
  element.__resizeListeners__.push(fn);
};

/* istanbul ignore next */
var removeResizeListener = exports.removeResizeListener = function removeResizeListener(element, fn) {
  if (!element || !element.__resizeListeners__) return;
  element.__resizeListeners__.splice(element.__resizeListeners__.indexOf(fn), 1);
  if (!element.__resizeListeners__.length) {
    element.__ro__.disconnect();
  }
};