323 lines
12 KiB
JavaScript
323 lines
12 KiB
JavaScript
/*
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Copyright 2015, 2016 OpenMarket Ltd
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Licensed under the Apache License, Version 2.0 (the "License");
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you may not use this file except in compliance with the License.
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You may obtain a copy of the License at
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http://www.apache.org/licenses/LICENSE-2.0
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Unless required by applicable law or agreed to in writing, software
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distributed under the License is distributed on an "AS IS" BASIS,
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WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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See the License for the specific language governing permissions and
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limitations under the License.
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*/
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import React from 'react';
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import ReactDOM from 'react-dom';
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import Analytics from './Analytics';
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import dis from './dispatcher';
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import {defer} from './utils/promise';
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import AsyncWrapper from './AsyncWrapper';
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const DIALOG_CONTAINER_ID = "mx_Dialog_Container";
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const STATIC_DIALOG_CONTAINER_ID = "mx_Dialog_StaticContainer";
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class ModalManager {
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constructor() {
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this._counter = 0;
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// The modal to prioritise over all others. If this is set, only show
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// this modal. Remove all other modals from the stack when this modal
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// is closed.
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this._priorityModal = null;
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// The modal to keep open underneath other modals if possible. Useful
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// for cases like Settings where the modal should remain open while the
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// user is prompted for more information/errors.
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this._staticModal = null;
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// A list of the modals we have stacked up, with the most recent at [0]
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// Neither the static nor priority modal will be in this list.
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this._modals = [
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/* {
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elem: React component for this dialog
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onFinished: caller-supplied onFinished callback
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className: CSS class for the dialog wrapper div
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} */
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];
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this.onBackgroundClick = this.onBackgroundClick.bind(this);
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}
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hasDialogs() {
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return this._priorityModal || this._staticModal || this._modals.length > 0;
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}
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getOrCreateContainer() {
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let container = document.getElementById(DIALOG_CONTAINER_ID);
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if (!container) {
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container = document.createElement("div");
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container.id = DIALOG_CONTAINER_ID;
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document.body.appendChild(container);
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}
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return container;
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}
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getOrCreateStaticContainer() {
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let container = document.getElementById(STATIC_DIALOG_CONTAINER_ID);
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if (!container) {
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container = document.createElement("div");
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container.id = STATIC_DIALOG_CONTAINER_ID;
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document.body.appendChild(container);
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}
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return container;
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}
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createTrackedDialog(analyticsAction, analyticsInfo, ...rest) {
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Analytics.trackEvent('Modal', analyticsAction, analyticsInfo);
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return this.createDialog(...rest);
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}
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appendTrackedDialog(analyticsAction, analyticsInfo, ...rest) {
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Analytics.trackEvent('Modal', analyticsAction, analyticsInfo);
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return this.appendDialog(...rest);
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}
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createDialog(Element, ...rest) {
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return this.createDialogAsync(Promise.resolve(Element), ...rest);
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}
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appendDialog(Element, ...rest) {
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return this.appendDialogAsync(Promise.resolve(Element), ...rest);
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}
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createTrackedDialogAsync(analyticsAction, analyticsInfo, ...rest) {
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Analytics.trackEvent('Modal', analyticsAction, analyticsInfo);
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return this.createDialogAsync(...rest);
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}
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appendTrackedDialogAsync(analyticsAction, analyticsInfo, ...rest) {
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Analytics.trackEvent('Modal', analyticsAction, analyticsInfo);
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return this.appendDialogAsync(...rest);
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}
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_buildModal(prom, props, className, options) {
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const modal = {};
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// never call this from onFinished() otherwise it will loop
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const [closeDialog, onFinishedProm] = this._getCloseFn(modal, props);
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// don't attempt to reuse the same AsyncWrapper for different dialogs,
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// otherwise we'll get confused.
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const modalCount = this._counter++;
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// FIXME: If a dialog uses getDefaultProps it clobbers the onFinished
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// property set here so you can't close the dialog from a button click!
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modal.elem = (
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<AsyncWrapper key={modalCount} prom={prom} {...props}
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onFinished={closeDialog} />
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);
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modal.onFinished = props ? props.onFinished : null;
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modal.className = className;
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modal.onBeforeClose = options.onBeforeClose;
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modal.beforeClosePromise = null;
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modal.close = closeDialog;
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modal.closeReason = null;
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return {modal, closeDialog, onFinishedProm};
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}
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_getCloseFn(modal, props) {
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const deferred = defer();
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return [async (...args) => {
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if (modal.beforeClosePromise) {
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await modal.beforeClosePromise;
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} else if (modal.onBeforeClose) {
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modal.beforeClosePromise = modal.onBeforeClose(modal.closeReason);
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const shouldClose = await modal.beforeClosePromise;
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modal.beforeClosePromise = null;
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if (!shouldClose) {
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return;
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}
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}
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deferred.resolve(args);
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if (props && props.onFinished) props.onFinished.apply(null, args);
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const i = this._modals.indexOf(modal);
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if (i >= 0) {
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this._modals.splice(i, 1);
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}
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if (this._priorityModal === modal) {
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this._priorityModal = null;
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// XXX: This is destructive
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this._modals = [];
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}
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if (this._staticModal === modal) {
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this._staticModal = null;
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// XXX: This is destructive
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this._modals = [];
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}
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this._reRender();
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}, deferred.promise];
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}
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/**
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* @callback onBeforeClose
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* @param {string?} reason either "backgroundClick" or null
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* @return {Promise<bool>} whether the dialog should close
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*/
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/**
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* Open a modal view.
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*
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* This can be used to display a react component which is loaded as an asynchronous
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* webpack component. To do this, set 'loader' as:
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*
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* (cb) => {
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* require(['<module>'], cb);
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* }
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*
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* @param {Promise} prom a promise which resolves with a React component
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* which will be displayed as the modal view.
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*
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* @param {Object} props properties to pass to the displayed
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* component. (We will also pass an 'onFinished' property.)
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*
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* @param {String} className CSS class to apply to the modal wrapper
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*
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* @param {boolean} isPriorityModal if true, this modal will be displayed regardless
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* of other modals that are currently in the stack.
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* Also, when closed, all modals will be removed
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* from the stack.
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* @param {boolean} isStaticModal if true, this modal will be displayed under other
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* modals in the stack. When closed, all modals will
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* also be removed from the stack. This is not compatible
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* with being a priority modal. Only one modal can be
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* static at a time.
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* @param {Object} options? extra options for the dialog
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* @param {onBeforeClose} options.onBeforeClose a callback to decide whether to close the dialog
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* @returns {object} Object with 'close' parameter being a function that will close the dialog
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*/
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createDialogAsync(prom, props, className, isPriorityModal, isStaticModal, options = {}) {
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const {modal, closeDialog, onFinishedProm} = this._buildModal(prom, props, className, options);
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if (isPriorityModal) {
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// XXX: This is destructive
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this._priorityModal = modal;
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} else if (isStaticModal) {
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// This is intentionally destructive
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this._staticModal = modal;
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} else {
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this._modals.unshift(modal);
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}
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this._reRender();
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return {
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close: closeDialog,
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finished: onFinishedProm,
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};
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}
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appendDialogAsync(prom, props, className) {
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const {modal, closeDialog, onFinishedProm} = this._buildModal(prom, props, className, {});
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this._modals.push(modal);
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this._reRender();
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return {
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close: closeDialog,
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finished: onFinishedProm,
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};
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}
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onBackgroundClick() {
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const modal = this._getCurrentModal();
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if (!modal) {
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return;
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}
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// we want to pass a reason to the onBeforeClose
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// callback, but close is currently defined to
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// pass all number of arguments to the onFinished callback
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// so, pass the reason to close through a member variable
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modal.closeReason = "backgroundClick";
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modal.close();
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modal.closeReason = null;
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}
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_getCurrentModal() {
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return this._priorityModal ? this._priorityModal : (this._modals[0] || this._staticModal);
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}
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_reRender() {
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if (this._modals.length === 0 && !this._priorityModal && !this._staticModal) {
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// If there is no modal to render, make all of Riot available
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// to screen reader users again
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dis.dispatch({
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action: 'aria_unhide_main_app',
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});
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ReactDOM.unmountComponentAtNode(this.getOrCreateContainer());
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ReactDOM.unmountComponentAtNode(this.getOrCreateStaticContainer());
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return;
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}
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// Hide the content outside the modal to screen reader users
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// so they won't be able to navigate into it and act on it using
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// screen reader specific features
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dis.dispatch({
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action: 'aria_hide_main_app',
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});
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if (this._staticModal) {
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const classes = "mx_Dialog_wrapper mx_Dialog_staticWrapper "
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+ (this._staticModal.className ? this._staticModal.className : '');
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const staticDialog = (
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<div className={classes}>
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<div className="mx_Dialog">
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{ this._staticModal.elem }
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</div>
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<div className="mx_Dialog_background mx_Dialog_staticBackground" onClick={this.onBackgroundClick}></div>
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</div>
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);
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ReactDOM.render(staticDialog, this.getOrCreateStaticContainer());
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} else {
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// This is safe to call repeatedly if we happen to do that
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ReactDOM.unmountComponentAtNode(this.getOrCreateStaticContainer());
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}
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const modal = this._getCurrentModal();
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if (modal !== this._staticModal) {
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const classes = "mx_Dialog_wrapper "
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+ (this._staticModal ? "mx_Dialog_wrapperWithStaticUnder " : '')
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+ (modal.className ? modal.className : '');
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const dialog = (
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<div className={classes}>
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<div className="mx_Dialog">
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{modal.elem}
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</div>
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<div className="mx_Dialog_background" onClick={this.onBackgroundClick}></div>
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</div>
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);
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ReactDOM.render(dialog, this.getOrCreateContainer());
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} else {
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// This is safe to call repeatedly if we happen to do that
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ReactDOM.unmountComponentAtNode(this.getOrCreateContainer());
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}
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}
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}
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if (!global.singletonModalManager) {
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global.singletonModalManager = new ModalManager();
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}
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export default global.singletonModalManager;
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