1.1 --- /dev/null Thu Jan 01 00:00:00 1970 +0000
1.2 +++ b/accessible/src/jsat/content-script.js Wed Dec 31 06:09:35 2014 +0100
1.3 @@ -0,0 +1,168 @@
1.4 +/* This Source Code Form is subject to the terms of the Mozilla Public
1.5 + * License, v. 2.0. If a copy of the MPL was not distributed with this file,
1.6 + * You can obtain one at http://mozilla.org/MPL/2.0/. */
1.7 +
1.8 +let Ci = Components.interfaces;
1.9 +let Cu = Components.utils;
1.10 +
1.11 +Cu.import('resource://gre/modules/XPCOMUtils.jsm');
1.12 +XPCOMUtils.defineLazyModuleGetter(this, 'Logger',
1.13 + 'resource://gre/modules/accessibility/Utils.jsm');
1.14 +XPCOMUtils.defineLazyModuleGetter(this, 'Presentation',
1.15 + 'resource://gre/modules/accessibility/Presentation.jsm');
1.16 +XPCOMUtils.defineLazyModuleGetter(this, 'TraversalRules',
1.17 + 'resource://gre/modules/accessibility/TraversalRules.jsm');
1.18 +XPCOMUtils.defineLazyModuleGetter(this, 'Utils',
1.19 + 'resource://gre/modules/accessibility/Utils.jsm');
1.20 +XPCOMUtils.defineLazyModuleGetter(this, 'EventManager',
1.21 + 'resource://gre/modules/accessibility/EventManager.jsm');
1.22 +XPCOMUtils.defineLazyModuleGetter(this, 'ContentControl',
1.23 + 'resource://gre/modules/accessibility/ContentControl.jsm');
1.24 +XPCOMUtils.defineLazyModuleGetter(this, 'Roles',
1.25 + 'resource://gre/modules/accessibility/Constants.jsm');
1.26 +
1.27 +Logger.debug('content-script.js');
1.28 +
1.29 +let eventManager = null;
1.30 +let contentControl = null;
1.31 +
1.32 +function forwardToParent(aMessage) {
1.33 + // XXX: This is a silly way to make a deep copy
1.34 + let newJSON = JSON.parse(JSON.stringify(aMessage.json));
1.35 + newJSON.origin = 'child';
1.36 + sendAsyncMessage(aMessage.name, newJSON);
1.37 +}
1.38 +
1.39 +function forwardToChild(aMessage, aListener, aVCPosition) {
1.40 + let acc = aVCPosition || Utils.getVirtualCursor(content.document).position;
1.41 +
1.42 + if (!Utils.isAliveAndVisible(acc) || acc.role != Roles.INTERNAL_FRAME) {
1.43 + return false;
1.44 + }
1.45 +
1.46 + Logger.debug(() => {
1.47 + return ['forwardToChild', Logger.accessibleToString(acc),
1.48 + aMessage.name, JSON.stringify(aMessage.json, null, ' ')];
1.49 + });
1.50 +
1.51 + let mm = Utils.getMessageManager(acc.DOMNode);
1.52 +
1.53 + if (aListener) {
1.54 + mm.addMessageListener(aMessage.name, aListener);
1.55 + }
1.56 +
1.57 + // XXX: This is a silly way to make a deep copy
1.58 + let newJSON = JSON.parse(JSON.stringify(aMessage.json));
1.59 + newJSON.origin = 'parent';
1.60 + if (Utils.isContentProcess) {
1.61 + // XXX: OOP content's screen offset is 0,
1.62 + // so we remove the real screen offset here.
1.63 + newJSON.x -= content.mozInnerScreenX;
1.64 + newJSON.y -= content.mozInnerScreenY;
1.65 + }
1.66 + mm.sendAsyncMessage(aMessage.name, newJSON);
1.67 + return true;
1.68 +}
1.69 +
1.70 +function activateContextMenu(aMessage) {
1.71 + function sendContextMenuCoordinates(aAccessible) {
1.72 + let bounds = Utils.getBounds(aAccessible);
1.73 + sendAsyncMessage('AccessFu:ActivateContextMenu', {bounds: bounds});
1.74 + }
1.75 +
1.76 + let position = Utils.getVirtualCursor(content.document).position;
1.77 + if (!forwardToChild(aMessage, activateContextMenu, position)) {
1.78 + sendContextMenuCoordinates(position);
1.79 + }
1.80 +}
1.81 +
1.82 +function presentCaretChange(aText, aOldOffset, aNewOffset) {
1.83 + if (aOldOffset !== aNewOffset) {
1.84 + let msg = Presentation.textSelectionChanged(aText, aNewOffset, aNewOffset,
1.85 + aOldOffset, aOldOffset, true);
1.86 + sendAsyncMessage('AccessFu:Present', msg);
1.87 + }
1.88 +}
1.89 +
1.90 +function scroll(aMessage) {
1.91 + function sendScrollCoordinates(aAccessible) {
1.92 + let bounds = Utils.getBounds(aAccessible);
1.93 + sendAsyncMessage('AccessFu:DoScroll',
1.94 + { bounds: bounds,
1.95 + page: aMessage.json.page,
1.96 + horizontal: aMessage.json.horizontal });
1.97 + }
1.98 +
1.99 + let position = Utils.getVirtualCursor(content.document).position;
1.100 + if (!forwardToChild(aMessage, scroll, position)) {
1.101 + sendScrollCoordinates(position);
1.102 + }
1.103 +}
1.104 +
1.105 +function adjustRange(aMessage) {
1.106 + function sendUpDownKey(aAccessible) {
1.107 + let acc = Utils.getEmbeddedControl(aAccessible) || aAccessible;
1.108 + let elem = acc.DOMNode;
1.109 + if (elem) {
1.110 + if (elem.tagName === 'INPUT' && elem.type === 'range') {
1.111 + elem[aMessage.json.direction === 'forward' ? 'stepDown' : 'stepUp']();
1.112 + let changeEvent = content.document.createEvent('UIEvent');
1.113 + changeEvent.initEvent('change', true, true);
1.114 + elem.dispatchEvent(changeEvent);
1.115 + } else {
1.116 + let evt = content.document.createEvent('KeyboardEvent');
1.117 + let keycode = aMessage.json.direction == 'forward' ?
1.118 + content.KeyEvent.DOM_VK_DOWN : content.KeyEvent.DOM_VK_UP;
1.119 + evt.initKeyEvent(
1.120 + "keypress", false, true, null, false, false, false, false, keycode, 0);
1.121 + elem.dispatchEvent(evt);
1.122 + }
1.123 + }
1.124 + }
1.125 +
1.126 + let position = Utils.getVirtualCursor(content.document).position;
1.127 + if (!forwardToChild(aMessage, adjustRange, position)) {
1.128 + sendUpDownKey(position);
1.129 + }
1.130 +}
1.131 +addMessageListener(
1.132 + 'AccessFu:Start',
1.133 + function(m) {
1.134 + if (m.json.logLevel) {
1.135 + Logger.logLevel = Logger[m.json.logLevel];
1.136 + }
1.137 +
1.138 + Logger.debug('AccessFu:Start');
1.139 + if (m.json.buildApp)
1.140 + Utils.MozBuildApp = m.json.buildApp;
1.141 +
1.142 + addMessageListener('AccessFu:ContextMenu', activateContextMenu);
1.143 + addMessageListener('AccessFu:Scroll', scroll);
1.144 + addMessageListener('AccessFu:AdjustRange', adjustRange);
1.145 +
1.146 + if (!eventManager) {
1.147 + eventManager = new EventManager(this);
1.148 + }
1.149 + eventManager.start();
1.150 +
1.151 + if (!contentControl) {
1.152 + contentControl = new ContentControl(this);
1.153 + }
1.154 + contentControl.start();
1.155 +
1.156 + sendAsyncMessage('AccessFu:ContentStarted');
1.157 + });
1.158 +
1.159 +addMessageListener(
1.160 + 'AccessFu:Stop',
1.161 + function(m) {
1.162 + Logger.debug('AccessFu:Stop');
1.163 +
1.164 + removeMessageListener('AccessFu:ContextMenu', activateContextMenu);
1.165 + removeMessageListener('AccessFu:Scroll', scroll);
1.166 +
1.167 + eventManager.stop();
1.168 + contentControl.stop();
1.169 + });
1.170 +
1.171 +sendAsyncMessage('AccessFu:Ready');
