| // Copyright 2018 The Chromium Authors. All rights reserved. |
| // Use of this source code is governed by a BSD-style license that can be |
| // found in the LICENSE file. |
| |
| /** |
| * Handles sending messages between the background page and the Switch Access |
| * menu. |
| */ |
| const MessageHandler = { |
| /** |
| * function setActions() takes a list of comma-separated action names, |
| * containing only letters and hyphens. |
| */ |
| SET_ACTIONS_REGEX: /setActions[(]((?:[a-zA-Z-]+,)*[a-zA-Z-]+)[)]/, |
| |
| /** |
| * function setFocusRing() takes one element ID, containing only letters, |
| * hyphens, and underscores, and either 'on' or 'off'. |
| */ |
| SET_FOCUS_RING_REGEX: /setFocusRing[(]([a-zA-Z_-]+),((?:on)|(?:off))[)]/, |
| |
| /** |
| * The possible destinations for messages. |
| * @enum {string} |
| * @const |
| */ |
| Destination: {BACKGROUND: 'background', MENU_PANEL: 'menu_panel.html'}, |
| |
| /** |
| * Sends a message to the Switch Access menu panel with the given name and |
| * parameters. |
| * |
| * @param {!MessageHandler.Destination} destination |
| * @param {string} messageName |
| * @param {Array<string>=} opt_params |
| */ |
| sendMessage: (destination, messageName, opt_params) => { |
| let message = messageName; |
| if (opt_params) |
| message += '(' + opt_params.join(',') + ')'; |
| |
| const views = chrome.extension.getViews() || []; |
| for (const view of views) |
| if (view && view.location.href.includes(destination)) { |
| view.postMessage(message, window.location.origin); |
| return; |
| } |
| console.log('Couldn\'t find ', destination); |
| } |
| }; |
