applyStyles.js

'use strict';

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

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 = applyStyles;
exports.flush = flush;

var _react = require('react');

var _react2 = _interopRequireDefault(_react);

var _addStyles = require('style-loader/addStyles');

var _addStyles2 = _interopRequireDefault(_addStyles);

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

var _hoistNonReactStatics2 = _interopRequireDefault(_hoistNonReactStatics);

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

function _toConsumableArray(arr) { if (Array.isArray(arr)) { for (var i = 0, arr2 = Array(arr.length); i < arr.length; i++) { arr2[i] = arr[i]; } return arr2; } else { return Array.from(arr); } }

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; } /* eslint react/no-multi-comp:0 */

var ssrStyleElId = 'next-style-ssr';
var isServer = typeof window === 'undefined';

var serverStyles = !isServer ? null : [];
var removedSsrStyleEl = isServer ? null : false;
var removeSsrStyleElDelay = isServer ? null : 1000;

function applyStyles(styles) {
    styles = Array.isArray(styles) ? styles : [styles];

    return function (WrappedComponent) {
        var ApplyStyles = function (_Component) {
            _inherits(ApplyStyles, _Component);

            function ApplyStyles() {
                _classCallCheck(this, ApplyStyles);

                return _possibleConstructorReturn(this, (ApplyStyles.__proto__ || Object.getPrototypeOf(ApplyStyles)).apply(this, arguments));
            }

            _createClass(ApplyStyles, [{
                key: 'componentWillMount',
                value: function componentWillMount() {
                    if (isServer) {
                        this._willMountOnServer();
                    } else {
                        this._willMountOnClient();
                    }
                }
            }, {
                key: 'componentDidMount',
                value: function componentDidMount() {
                    // Remove the server-rendered style tag
                    if (removedSsrStyleEl) {
                        return;
                    }

                    removedSsrStyleEl = true;

                    setTimeout(function () {
                        var headEl = document.head || document.getElementsByTagName('head')[0];
                        var styleEl = document.getElementById(ssrStyleElId);

                        styleEl && headEl.removeChild(styleEl);
                    }, removeSsrStyleElDelay);
                }
            }, {
                key: 'componentWillUnmount',
                value: function componentWillUnmount() {
                    // Remove component styles
                    this._updateNextStyles([]);
                }
            }, {
                key: 'render',
                value: function render() {
                    return _react2.default.createElement(WrappedComponent, this.props);
                }
            }, {
                key: '_willMountOnServer',
                value: function _willMountOnServer() {
                    // Concatenate server styles so that they are flushed afterwards
                    styles.forEach(function (style) {
                        var _serverStyles;

                        return (_serverStyles = serverStyles).push.apply(_serverStyles, _toConsumableArray(style._nextStyles));
                    });
                }
            }, {
                key: '_willMountOnClient',
                value: function _willMountOnClient() {
                    // Insert component styles using style-loader's addStyles which does the hard work for us
                    var styleLoaderStyles = styles.reduce(function (arr, style) {
                        style._nextStyles.forEach(function (style) {
                            return arr.push([style.id, style.content, '', style.sourceMap]);
                        });
                        return arr;
                    }, []);

                    this._updateNextStyles = (0, _addStyles2.default)(styleLoaderStyles, {
                        fixUrls: true });
                }
            }]);

            return ApplyStyles;
        }(_react.Component);

        var displayName = WrappedComponent.displayName || WrappedComponent.name || 'Component';

        ApplyStyles.displayName = 'ApplyStyles(' + displayName + ')';
        ApplyStyles.ComposedComponent = WrappedComponent;

        return (0, _hoistNonReactStatics2.default)(ApplyStyles, WrappedComponent);
    };
}

function flush() {
    if (!isServer) {
        throw new Error('flush() should only be called on the server');
    }

    var flushedStyles = serverStyles;
    var flushedCss = serverStyles.reduce(function (concatenated, style) {
        return concatenated + style.content;
    }, '');

    serverStyles = [];

    return {
        tag: _react2.default.createElement('style', { id: ssrStyleElId, dangerouslySetInnerHTML: { __html: flushedCss } }),
        styles: flushedStyles
    };
}