zent/lib/loading/LoadingInstance.js

一套前端设计语言和基于React的实现

'use strict';

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

var _extends2 = require('babel-runtime/helpers/extends');

var _extends3 = _interopRequireDefault(_extends2);

var _classCallCheck2 = require('babel-runtime/helpers/classCallCheck');

var _classCallCheck3 = _interopRequireDefault(_classCallCheck2);

var _createClass2 = require('babel-runtime/helpers/createClass');

var _createClass3 = _interopRequireDefault(_createClass2);

var _possibleConstructorReturn2 = require('babel-runtime/helpers/possibleConstructorReturn');

var _possibleConstructorReturn3 = _interopRequireDefault(_possibleConstructorReturn2);

var _inherits2 = require('babel-runtime/helpers/inherits');

var _inherits3 = _interopRequireDefault(_inherits2);

var _react = require('react');

var _react2 = _interopRequireDefault(_react);

var _reactDom = require('react-dom');

var _reactDom2 = _interopRequireDefault(_reactDom);

var _isBrowser = require('../utils/isBrowser');

var _isBrowser2 = _interopRequireDefault(_isBrowser);

var _defer = require('lodash/defer');

var _defer2 = _interopRequireDefault(_defer);

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

var _propTypes2 = _interopRequireDefault(_propTypes);

var _Loading = require('./Loading');

var _Loading2 = _interopRequireDefault(_Loading);

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

// Global loading instance
var loadingInstance = void 0;

var Instance = function (_ref) {
  (0, _inherits3['default'])(Instance, _ref);

  function Instance() {
    (0, _classCallCheck3['default'])(this, Instance);
    return (0, _possibleConstructorReturn3['default'])(this, (Instance.__proto__ || Object.getPrototypeOf(Instance)).apply(this, arguments));
  }

  (0, _createClass3['default'])(Instance, [{
    key: 'componentDidMount',
    value: function componentDidMount() {
      this.renderLoading();
    }

    // 因为需要确保内部元素已经 render 完毕，所以使用 did，但是因此带来额外的对 show 字段的判断逻辑

  }, {
    key: 'componentDidUpdate',
    value: function componentDidUpdate() {
      this.renderLoading();
    }
  }, {
    key: 'componentWillUnmount',
    value: function componentWillUnmount() {
      if (this.instance) {
        var loadingContainer = this.instance.container;
        _reactDom2['default'].unmountComponentAtNode(this.instance.container);
        loadingContainer.parentNode.removeChild(loadingContainer);
      }
    }

    // 通过以下函数与组件通信

  }, {
    key: 'renderLoading',
    value: function renderLoading(target) {
      // static 方式，loading 将存在于文档流中
      if (!isFloat(this.props)) {
        return;
      }

      if (!this.instance) {
        if (!target) {
          target = _reactDom2['default'].findDOMNode(this);
        }
        this.instance = newInstance((0, _extends3['default'])({}, this.props, {
          target: target
        }));
      }

      if (this.instance) {
        this.instance.show(this.props);
      }
    }
  }, {
    key: 'render',
    value: function render() {
      var float = isFloat(this.props);

      if (!isFloat(this.props)) {
        return _react2['default'].createElement(
          _Loading2['default'],
          (0, _extends3['default'])({}, this.props, { float: float }),
          this.props.children
        );
      }

      // Return null to make React happy if Loading has no children
      return this.props.children || null;
    }
  }]);
  return Instance;
}(_react.PureComponent || _react.Component);

// ReactDOM.render returns null when called inside lifecycle methods
// Just a workaround
// These methods should be considered deprecated, don't use them.


Instance.propTypes = {
  prefix: _propTypes2['default'].string,
  className: _propTypes2['default'].string,
  float: _propTypes2['default'].bool,
  show: _propTypes2['default'].bool,
  zIndex: _propTypes2['default'].number,
  containerClass: _propTypes2['default'].string
};
Instance.defaultProps = {
  prefix: 'zent',
  className: '',
  // FIXME: use defaultProps when we drop support for static
  // float: false,
  show: false,
  height: 160,
  zIndex: 9998,
  containerClass: ''
};
exports['default'] = Instance;
Instance.on = function (options) {
  return (0, _defer2['default'])(on, options);
};
Instance.off = function (options) {
  return (0, _defer2['default'])(off, options);
};
Instance.newInstance = function (props) {
  return (0, _defer2['default'])(newInstance, props);
};

function on() {
  var _ref2 = arguments.length > 0 && arguments[0] !== undefined ? arguments[0] : {},
      _ref2$prefix = _ref2.prefix,
      prefix = _ref2$prefix === undefined ? 'zent' : _ref2$prefix,
      _ref2$className = _ref2.className,
      className = _ref2$className === undefined ? '' : _ref2$className,
      _ref2$containerClass = _ref2.containerClass,
      containerClass = _ref2$containerClass === undefined ? '' : _ref2$containerClass,
      _ref2$zIndex = _ref2.zIndex,
      zIndex = _ref2$zIndex === undefined ? 9998 : _ref2$zIndex;

  if (!_isBrowser2['default']) return;

  if (!loadingInstance) {
    loadingInstance = newInstance({
      show: true,
      prefix: prefix,
      className: className,
      containerClass: containerClass,
      zIndex: zIndex,
      float: true
    });

    return;
  }

  loadingInstance.show({
    show: true
  });
}

function off() {
  if (!_isBrowser2['default']) return;

  if (!loadingInstance) return;

  loadingInstance.show({
    show: false
  });
}

function newInstance(props) {
  if (!_isBrowser2['default']) return;

  var div = document.createElement('div');
  div.className = props.prefix + '-loading-container ' + props.containerClass;
  document.body.appendChild(div);
  var loading = _reactDom2['default'].render(_react2['default'].createElement(_Loading2['default'], props), div);
  return {
    show: loading.show,
    container: div
  };
}

// FIXME: remove support for props.static
function isFloat(props) {
  var hasStatic = props.hasOwnProperty('static');
  var hasFloat = props.hasOwnProperty('float');

  if (hasFloat) {
    return props.float;
  }

  return hasStatic ? !props['static'] : false;
}