PointerEventsContainer.js
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'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; }; }();
exports.default = create;
var _react = require('react');
var React = _interopRequireWildcard(_react);
var _invariant = require('../../utils/invariant');
var _invariant2 = _interopRequireDefault(_invariant);
var _AnimatedValueSubscription = require('../AnimatedValueSubscription');
var _AnimatedValueSubscription2 = _interopRequireDefault(_AnimatedValueSubscription);
function _interopRequireDefault(obj) { return obj && obj.__esModule ? obj : { default: obj }; }
function _interopRequireWildcard(obj) { if (obj && obj.__esModule) { return obj; } else { var newObj = {}; if (obj != null) { for (var key in obj) { if (Object.prototype.hasOwnProperty.call(obj, key)) newObj[key] = obj[key]; } } newObj.default = obj; return newObj; } }
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 MIN_POSITION_OFFSET = 0.01;
/**
* Create a higher-order component that automatically computes the
* `pointerEvents` property for a component whenever navigation position
* changes.
*/
function create(Component) {
var Container = function (_React$Component) {
_inherits(Container, _React$Component);
function Container(props, context) {
_classCallCheck(this, Container);
var _this = _possibleConstructorReturn(this, (Container.__proto__ || Object.getPrototypeOf(Container)).call(this, props, context));
_this._pointerEvents = _this._computePointerEvents();
return _this;
}
_createClass(Container, [{
key: 'componentWillMount',
value: function componentWillMount() {
this._onPositionChange = this._onPositionChange.bind(this);
this._onComponentRef = this._onComponentRef.bind(this);
}
}, {
key: 'componentDidMount',
value: function componentDidMount() {
this._bindPosition(this.props);
}
}, {
key: 'componentWillUnmount',
value: function componentWillUnmount() {
this._positionListener && this._positionListener.remove();
}
}, {
key: 'componentWillReceiveProps',
value: function componentWillReceiveProps(nextProps) {
this._bindPosition(nextProps);
}
}, {
key: 'render',
value: function render() {
this._pointerEvents = this._computePointerEvents();
return React.createElement(Component, _extends({}, this.props, {
pointerEvents: this._pointerEvents,
onComponentRef: this._onComponentRef
}));
}
}, {
key: '_onComponentRef',
value: function _onComponentRef(component) {
this._component = component;
if (component) {
(0, _invariant2.default)(typeof component.setNativeProps === 'function', 'component must implement method `setNativeProps`');
}
}
}, {
key: '_bindPosition',
value: function _bindPosition(props) {
this._positionListener && this._positionListener.remove();
this._positionListener = new _AnimatedValueSubscription2.default(props.position, this._onPositionChange);
}
}, {
key: '_onPositionChange',
value: function _onPositionChange() {
if (this._component) {
var pointerEvents = this._computePointerEvents();
if (this._pointerEvents !== pointerEvents) {
this._pointerEvents = pointerEvents;
this._component.setNativeProps({ pointerEvents: pointerEvents });
}
}
}
}, {
key: '_computePointerEvents',
value: function _computePointerEvents() {
var _props = this.props,
navigation = _props.navigation,
position = _props.position,
scene = _props.scene;
if (scene.isStale || navigation.state.index !== scene.index) {
// The scene isn't focused.
return scene.index > navigation.state.index ? 'box-only' : 'none';
}
var offset = position.__getAnimatedValue() - navigation.state.index;
if (Math.abs(offset) > MIN_POSITION_OFFSET) {
// The positon is still away from scene's index.
// Scene's children should not receive touches until the position
// is close enough to scene's index.
return 'box-only';
}
return 'auto';
}
}]);
return Container;
}(React.Component);
return Container;
}