office-ui-fabric-react/lib/common/ConnectedHost.js

Reusable React components for building experiences for Office 365.

"use strict";
Object.defineProperty(exports, "__esModule", { value: true });
var tslib_1 = require("tslib");
var React = require("react");
var PropTypes = require("prop-types");
var Utilities_1 = require("../Utilities");
// Track all components that require changes.
var _changedComponents;
var ConnectedHost = (function (_super) {
    tslib_1.__extends(ConnectedHost, _super);
    function ConnectedHost(props) {
        var _this = _super.call(this, props) || this;
        _this.state = {
            props: null
        };
        return _this;
    }
    ConnectedHost.prototype.componentWillMount = function () {
        var _this = this;
        if (this.props.storesToSubscribe && this.props.storesToSubscribe.length > 0) {
            if (!this.context.stores) {
                throw "A connected component was hosted in an environment where no stores were hosted. Use the StoreHost to host components.";
            }
            // Resolve and subscribe to stores.
            this._stores = this.props.storesToSubscribe.map(function (storeKey) {
                var store = _this.context.stores.getStore(storeKey);
                if (!store) {
                    throw "The \"" + storeKey.name + "\" store was required by a connected component, but not exposed.";
                }
                _this._disposables.push(store.subscribe(_this._onStoreChanged));
                return store;
            });
        }
        // We can only initialize state at this point, where context has been resolved.
        this.state = {
            props: this._getComponentProps(this.props)
        };
    };
    ConnectedHost.prototype.componentDidMount = function () {
        this._isMounted = true;
    };
    ConnectedHost.prototype.componentWillUnmount = function () {
        this._isMounted = false;
    };
    ConnectedHost.prototype.componentWillReceiveProps = function (newProps) {
        this._updateProps(newProps);
    };
    ConnectedHost.prototype.shouldComponentUpdate = function (newProps, newState) {
        var inputPropsHaveChanged = !Utilities_1.shallowCompare(this.props.componentProps, newProps.componentProps);
        var computedPropsHaveChanged = !Utilities_1.shallowCompare(this.state.props, newState.props);
        var shouldUpdate = inputPropsHaveChanged || computedPropsHaveChanged;
        return shouldUpdate;
    };
    ConnectedHost.prototype.render = function () {
        var Component = this.props.component;
        var props = this.state.props;
        return props ? React.createElement(Component, tslib_1.__assign({}, props)) : null;
    };
    ConnectedHost.prototype._onStoreChanged = function () {
        var storesToSubscribe = this.props.storesToSubscribe;
        if (!storesToSubscribe || storesToSubscribe.length < 2) {
            this._updateProps();
        }
        else if (!this._changeEnqueued) {
            if (!_changedComponents) {
                _changedComponents = [];
                this._async.setImmediate(function () {
                    _changedComponents.forEach(function (comp) { return comp._updateProps(); });
                    _changedComponents = null;
                });
            }
            _changedComponents.push(this);
            this._changeEnqueued = true;
        }
    };
    ConnectedHost.prototype._updateProps = function (props) {
        this._changeEnqueued = false;
        props = this._getComponentProps(props || this.props);
        this.setState({ props: props });
    };
    ConnectedHost.prototype._getComponentProps = function (props) {
        var newProps = Utilities_1.assign({}, props.componentProps, props.getProps.apply(props, [props.componentProps].concat(this._stores)));
        return newProps;
    };
    ConnectedHost.contextTypes = {
        stores: PropTypes.object
    };
    tslib_1.__decorate([
        Utilities_1.autobind
    ], ConnectedHost.prototype, "_onStoreChanged", null);
    tslib_1.__decorate([
        Utilities_1.autobind
    ], ConnectedHost.prototype, "_updateProps", null);
    return ConnectedHost;
}(Utilities_1.BaseComponent));
exports.ConnectedHost = ConnectedHost;
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