armo-breadboard/lib/Injectors.js

Edit a live React component's source in real time.

'use strict';

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

var _class, _temp;

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; }; }();

exports.injectDimensions = injectDimensions;

var _react = require('react');

var _react2 = _interopRequireDefault(_react);

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

var _reactDom2 = _interopRequireDefault(_reactDom);

var _exenv = require('exenv');

var _exenv2 = _interopRequireDefault(_exenv);

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

var _propTypes2 = _interopRequireDefault(_propTypes);

var _hoistNonReactStatics = require('hoist-non-react-statics');

var _hoistNonReactStatics2 = _interopRequireDefault(_hoistNonReactStatics);

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

function _objectWithoutProperties(obj, keys) { var target = {}; for (var i in obj) { if (keys.indexOf(i) >= 0) continue; if (!Object.prototype.hasOwnProperty.call(obj, i)) continue; target[i] = obj[i]; } return target; }

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; }

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

var breadboardResizeObserver = void 0;
if (_exenv2.default.canUseDOM) {
  var ResizeObserver = require('resize-observer-polyfill').default;

  var BreadboardResizeObserver = function () {
    function BreadboardResizeObserver() {
      var _this = this;

      _classCallCheck(this, BreadboardResizeObserver);

      this.callbacks = new Map();
      this.observer = new ResizeObserver(function (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 callback = _this.callbacks.get(entry.target);

            if (callback) {
              callback({
                height: entry.contentRect.height,
                width: entry.contentRect.width
              });
            }
          }
        } catch (err) {
          _didIteratorError = true;
          _iteratorError = err;
        } finally {
          try {
            if (!_iteratorNormalCompletion && _iterator.return) {
              _iterator.return();
            }
          } finally {
            if (_didIteratorError) {
              throw _iteratorError;
            }
          }
        }
      });
    }

    _createClass(BreadboardResizeObserver, [{
      key: 'observe',
      value: function observe(target, callback) {
        this.observer.observe(target);
        this.callbacks.set(target, callback);
      }
    }, {
      key: 'unobserve',
      value: function unobserve(target, callback) {
        this.observer.unobserve(target);
        this.callbacks.delete(target, callback);
      }
    }]);

    return BreadboardResizeObserver;
  }();

  breadboardResizeObserver = new BreadboardResizeObserver();
}

/**
 * Inject the child element's width and height, as computed by a
 * ResizeObserver.
 */
var InjectDimensions = exports.InjectDimensions = (_temp = _class = function (_Component) {
  _inherits(InjectDimensions, _Component);

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

    // The dimensions are not defined until we can measure them, or unless
    // a fixed value is provided.
    var _this2 = _possibleConstructorReturn(this, (InjectDimensions.__proto__ || Object.getPrototypeOf(InjectDimensions)).call(this, props));

    _this2.receiveRef = function (x) {
      _this2.domNode = x && _reactDom2.default.findDOMNode(x);
    };

    _this2.handleResize = function (measured) {
      _this2.setState({
        height: measured.height,
        width: measured.width
      });
    };

    _this2.state = {
      observed: false,
      height: undefined,
      width: undefined
    };
    return _this2;
  }

  _createClass(InjectDimensions, [{
    key: 'componentDidMount',
    value: function componentDidMount() {
      var shouldObserve = this.props.width === undefined || this.props.height === undefined;

      if (shouldObserve) {
        this.observe();
      }
    }
  }, {
    key: 'componentWillReceiveProps',
    value: function componentWillReceiveProps(nextProps) {
      var shouldObserve = nextProps.width === undefined || nextProps.height === undefined;

      if (shouldObserve && !this.state.observed) {
        this.observe();
      } else if (!shouldObserve && this.state.observed) {
        this.unobserve();
        this.setState({
          observed: false
        });
      }
    }
  }, {
    key: 'componentDidUpdate',
    value: function componentDidUpdate(prevProps, prevState) {
      var shouldObserve = this.props.width === undefined || this.props.height === undefined;

      if (this.domNode !== this.state.observed) {
        this.unobserve();
        if (this.domNode && shouldObserve) {
          this.observe();
        }
      }
    }
  }, {
    key: 'componentWillUnmount',
    value: function componentWillUnmount() {
      this.unobserve();
    }
  }, {
    key: 'shouldComponentUpdate',
    value: function shouldComponentUpdate(nextProps, nextState) {
      var measuredHeightChanged = nextState.height !== this.state.height;
      var measuredWidthChanged = nextState.width !== this.state.width;

      // don't cause an update when it originated from a resize observation,
      // but that observation is overriden by a forced width/height
      var insignificantMeasurementOccured = nextState.observed && this.state.observed && (measuredHeightChanged || measuredWidthChanged) && !(measuredHeightChanged && nextProps.height === undefined || measuredWidthChanged && nextProps.width === undefined);

      return !insignificantMeasurementOccured;
    }
  }, {
    key: 'render',
    value: function render() {
      var props = this.props;
      var state = this.state;

      return _react2.default.cloneElement(_react2.default.Children.only(props.children), {
        width: state.width === undefined ? props.defaultWidth : state.width,
        height: state.height === undefined ? props.defaultHeight : state.height,
        ref: this.receiveRef
      });
    }
  }, {
    key: 'observe',
    value: function observe() {
      breadboardResizeObserver.observe(this.domNode, this.handleResize);
      var measured = this.domNode.getBoundingClientRect();
      this.setState({
        observed: this.domNode,
        height: measured.height,
        width: measured.width
      });
    }
  }, {
    key: 'unobserve',
    value: function unobserve() {
      if (this.state.observed) {
        breadboardResizeObserver.unobserve(this.state.observed, this.handleResize);
      }
    }
  }]);

  return InjectDimensions;
}(_react.Component), _class.propTypes = {
  /**
   * The value to use for `height` before we are able to make a measurement.
   */
  defaultHeight: _propTypes2.default.number,

  /**
   * The value to use for `width` before we are able to make a measurement.
   */
  defaultWidth: _propTypes2.default.number,

  /**
   * If a number or `null`, the height will be passed directly to the child
   * element instead of being observed.
   */
  height: _propTypes2.default.number,

  /**
   * If a number or `null`, the width will be passed directly to the child
   * element instead of being observed.
   */
  width: _propTypes2.default.number,

  /**
   * This component expects a single child that is a React Element.
   */
  children: _propTypes2.default.element.isRequired
}, _temp);
function injectDimensions(WrappedComponent) {
  function InjectDimensionsWrapper(_ref) {
    var defaultHeight = _ref.defaultHeight,
        defaultWidth = _ref.defaultWidth,
        height = _ref.height,
        width = _ref.width,
        other = _objectWithoutProperties(_ref, ['defaultHeight', 'defaultWidth', 'height', 'width']);

    return _react2.default.createElement(InjectDimensions, { defaultHeight: defaultHeight, defaultWidth: defaultWidth, height: height, width: width }, _react2.default.createElement(WrappedComponent, other));
  }

  (0, _hoistNonReactStatics2.default)(InjectDimensionsWrapper, WrappedComponent);

  return InjectDimensionsWrapper;
}

injectDimensions.withConfiguration = function (forceProps) {
  return function injectDimensions(WrappedComponent) {
    function InjectDimensionsWrapper(props) {
      var _Object$assign = Object.assign({}, props, forceProps),
          defaultHeight = _Object$assign.defaultHeight,
          defaultWidth = _Object$assign.defaultWidth,
          height = _Object$assign.height,
          width = _Object$assign.width,
          other = _objectWithoutProperties(_Object$assign, ['defaultHeight', 'defaultWidth', 'height', 'width']);

      return _react2.default.createElement(InjectDimensions, { defaultHeight: defaultHeight, defaultWidth: defaultWidth, height: height, width: width }, _react2.default.createElement(WrappedComponent, other));
    }

    (0, _hoistNonReactStatics2.default)(InjectDimensionsWrapper, WrappedComponent);

    return InjectDimensionsWrapper;
  };
};