jimu-mobile/dist/components/align/Align.js

积木组件库助力移动端开发

'use strict';

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

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

var _react = require('react');

var _react2 = _interopRequireDefault(_react);

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

var _propTypes2 = _interopRequireDefault(_propTypes);

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

var _reactDom2 = _interopRequireDefault(_reactDom);

var _domAlign = require('./dom-align');

var _domAlign2 = _interopRequireDefault(_domAlign);

var _addEventListener = require('./addEventListener');

var _addEventListener2 = _interopRequireDefault(_addEventListener);

var _isWindow = require('./isWindow');

var _isWindow2 = _interopRequireDefault(_isWindow);

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

function _defaults(obj, defaults) {
  var keys = Object.getOwnPropertyNames(defaults);for (var i = 0; i < keys.length; i++) {
    var key = keys[i];var value = Object.getOwnPropertyDescriptor(defaults, key);if (value && value.configurable && obj[key] === undefined) {
      Object.defineProperty(obj, key, value);
    }
  }return 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 === 'undefined' ? 'undefined' : _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 === 'undefined' ? 'undefined' : _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) : _defaults(subClass, superClass);
}

function buffer(fn, ms) {
  var timer = void 0;

  function clear() {
    if (timer) {
      clearTimeout(timer);
      timer = null;
    }
  }

  function bufferFn() {
    clear();
    timer = setTimeout(fn, ms);
  }

  bufferFn.clear = clear;

  return bufferFn;
}

var Align = function (_Component) {
  _inherits(Align, _Component);

  function Align() {
    var _temp, _this, _ret;

    _classCallCheck(this, Align);

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

    return _ret = (_temp = (_this = _possibleConstructorReturn(this, _Component.call.apply(_Component, [this].concat(args))), _this), _this.forceAlign = function () {
      var props = _this.props;
      if (!props.disabled) {
        var source = _reactDom2["default"].findDOMNode(_this);
        props.onAlign(source, (0, _domAlign2["default"])(source, props.target(), props.align));
      }
    }, _temp), _possibleConstructorReturn(_this, _ret);
  }

  Align.prototype.componentDidMount = function componentDidMount() {
    var props = this.props;
    // if parent ref not attached .... use document.getElementById
    this.forceAlign();
    if (!props.disabled && props.monitorWindowResize) {
      this.startMonitorWindowResize();
    }
  };

  Align.prototype.componentDidUpdate = function componentDidUpdate(prevProps) {
    var reAlign = false;
    var props = this.props;

    if (!props.disabled) {
      if (prevProps.disabled || prevProps.align !== props.align) {
        reAlign = true;
      } else {
        var lastTarget = prevProps.target();
        var currentTarget = props.target();
        if ((0, _isWindow2["default"])(lastTarget) && (0, _isWindow2["default"])(currentTarget)) {
          reAlign = false;
        } else if (lastTarget !== currentTarget) {
          reAlign = true;
        }
      }
    }

    if (reAlign) {
      this.forceAlign();
    }

    if (props.monitorWindowResize && !props.disabled) {
      this.startMonitorWindowResize();
    } else {
      this.stopMonitorWindowResize();
    }
  };

  Align.prototype.componentWillUnmount = function componentWillUnmount() {
    this.stopMonitorWindowResize();
  };

  Align.prototype.startMonitorWindowResize = function startMonitorWindowResize() {
    if (!this.resizeHandler) {
      this.bufferMonitor = buffer(this.forceAlign, this.props.monitorBufferTime);
      this.resizeHandler = (0, _addEventListener2["default"])(window, 'resize', this.bufferMonitor);
    }
  };

  Align.prototype.stopMonitorWindowResize = function stopMonitorWindowResize() {
    if (this.resizeHandler) {
      this.bufferMonitor.clear();
      this.resizeHandler.remove();
      this.resizeHandler = null;
    }
  };

  Align.prototype.render = function render() {
    var _props = this.props,
        childrenProps = _props.childrenProps,
        children = _props.children;

    var child = _react2["default"].Children.only(children);
    if (childrenProps) {
      var newProps = {};
      for (var prop in childrenProps) {
        if (childrenProps.hasOwnProperty(prop)) {
          newProps[prop] = this.props[childrenProps[prop]];
        }
      }
      return _react2["default"].cloneElement(child, newProps);
    }
    return child;
  };

  return Align;
}(_react.Component);

Align.propTypes = {
  childrenProps: _propTypes2["default"].object,
  align: _propTypes2["default"].object.isRequired,
  target: _propTypes2["default"].func,
  onAlign: _propTypes2["default"].func,
  monitorBufferTime: _propTypes2["default"].number,
  monitorWindowResize: _propTypes2["default"].bool,
  disabled: _propTypes2["default"].bool,
  children: _propTypes2["default"].any
};
Align.defaultProps = {
  target: function target() {
    return window;
  },
  onAlign: function onAlign() {},
  monitorBufferTime: 50,
  monitorWindowResize: false,
  disabled: false
};
exports["default"] = Align;
module.exports = exports['default'];