michael@0: /* This Source Code Form is subject to the terms of the Mozilla Public
michael@0:  * License, v. 2.0. If a copy of the MPL was not distributed with this file,
michael@0:  * You can obtain one at http://mozilla.org/MPL/2.0/. */
michael@0: 
michael@0: let Ci = Components.interfaces;
michael@0: let Cu = Components.utils;
michael@0: 
michael@0: Cu.import('resource://gre/modules/XPCOMUtils.jsm');
michael@0: XPCOMUtils.defineLazyModuleGetter(this, 'Logger',
michael@0:   'resource://gre/modules/accessibility/Utils.jsm');
michael@0: XPCOMUtils.defineLazyModuleGetter(this, 'Presentation',
michael@0:   'resource://gre/modules/accessibility/Presentation.jsm');
michael@0: XPCOMUtils.defineLazyModuleGetter(this, 'TraversalRules',
michael@0:   'resource://gre/modules/accessibility/TraversalRules.jsm');
michael@0: XPCOMUtils.defineLazyModuleGetter(this, 'Utils',
michael@0:   'resource://gre/modules/accessibility/Utils.jsm');
michael@0: XPCOMUtils.defineLazyModuleGetter(this, 'EventManager',
michael@0:   'resource://gre/modules/accessibility/EventManager.jsm');
michael@0: XPCOMUtils.defineLazyModuleGetter(this, 'ContentControl',
michael@0:   'resource://gre/modules/accessibility/ContentControl.jsm');
michael@0: XPCOMUtils.defineLazyModuleGetter(this, 'Roles',
michael@0:   'resource://gre/modules/accessibility/Constants.jsm');
michael@0: 
michael@0: Logger.debug('content-script.js');
michael@0: 
michael@0: let eventManager = null;
michael@0: let contentControl = null;
michael@0: 
michael@0: function forwardToParent(aMessage) {
michael@0:   // XXX: This is a silly way to make a deep copy
michael@0:   let newJSON = JSON.parse(JSON.stringify(aMessage.json));
michael@0:   newJSON.origin = 'child';
michael@0:   sendAsyncMessage(aMessage.name, newJSON);
michael@0: }
michael@0: 
michael@0: function forwardToChild(aMessage, aListener, aVCPosition) {
michael@0:   let acc = aVCPosition || Utils.getVirtualCursor(content.document).position;
michael@0: 
michael@0:   if (!Utils.isAliveAndVisible(acc) || acc.role != Roles.INTERNAL_FRAME) {
michael@0:     return false;
michael@0:   }
michael@0: 
michael@0:   Logger.debug(() => {
michael@0:     return ['forwardToChild', Logger.accessibleToString(acc),
michael@0:             aMessage.name, JSON.stringify(aMessage.json, null, '  ')];
michael@0:   });
michael@0: 
michael@0:   let mm = Utils.getMessageManager(acc.DOMNode);
michael@0: 
michael@0:   if (aListener) {
michael@0:     mm.addMessageListener(aMessage.name, aListener);
michael@0:   }
michael@0: 
michael@0:   // XXX: This is a silly way to make a deep copy
michael@0:   let newJSON = JSON.parse(JSON.stringify(aMessage.json));
michael@0:   newJSON.origin = 'parent';
michael@0:   if (Utils.isContentProcess) {
michael@0:     // XXX: OOP content's screen offset is 0,
michael@0:     // so we remove the real screen offset here.
michael@0:     newJSON.x -= content.mozInnerScreenX;
michael@0:     newJSON.y -= content.mozInnerScreenY;
michael@0:   }
michael@0:   mm.sendAsyncMessage(aMessage.name, newJSON);
michael@0:   return true;
michael@0: }
michael@0: 
michael@0: function activateContextMenu(aMessage) {
michael@0:   function sendContextMenuCoordinates(aAccessible) {
michael@0:     let bounds = Utils.getBounds(aAccessible);
michael@0:     sendAsyncMessage('AccessFu:ActivateContextMenu', {bounds: bounds});
michael@0:   }
michael@0: 
michael@0:   let position = Utils.getVirtualCursor(content.document).position;
michael@0:   if (!forwardToChild(aMessage, activateContextMenu, position)) {
michael@0:     sendContextMenuCoordinates(position);
michael@0:   }
michael@0: }
michael@0: 
michael@0: function presentCaretChange(aText, aOldOffset, aNewOffset) {
michael@0:   if (aOldOffset !== aNewOffset) {
michael@0:     let msg = Presentation.textSelectionChanged(aText, aNewOffset, aNewOffset,
michael@0:                                                 aOldOffset, aOldOffset, true);
michael@0:     sendAsyncMessage('AccessFu:Present', msg);
michael@0:   }
michael@0: }
michael@0: 
michael@0: function scroll(aMessage) {
michael@0:   function sendScrollCoordinates(aAccessible) {
michael@0:     let bounds = Utils.getBounds(aAccessible);
michael@0:     sendAsyncMessage('AccessFu:DoScroll',
michael@0:                      { bounds: bounds,
michael@0:                        page: aMessage.json.page,
michael@0:                        horizontal: aMessage.json.horizontal });
michael@0:   }
michael@0: 
michael@0:   let position = Utils.getVirtualCursor(content.document).position;
michael@0:   if (!forwardToChild(aMessage, scroll, position)) {
michael@0:     sendScrollCoordinates(position);
michael@0:   }
michael@0: }
michael@0: 
michael@0: function adjustRange(aMessage) {
michael@0:   function sendUpDownKey(aAccessible) {
michael@0:     let acc = Utils.getEmbeddedControl(aAccessible) || aAccessible;
michael@0:     let elem = acc.DOMNode;
michael@0:     if (elem) {
michael@0:       if (elem.tagName === 'INPUT' && elem.type === 'range') {
michael@0:         elem[aMessage.json.direction === 'forward' ? 'stepDown' : 'stepUp']();
michael@0:         let changeEvent = content.document.createEvent('UIEvent');
michael@0:         changeEvent.initEvent('change', true, true);
michael@0:         elem.dispatchEvent(changeEvent);
michael@0:       } else {
michael@0:         let evt = content.document.createEvent('KeyboardEvent');
michael@0:         let keycode = aMessage.json.direction == 'forward' ?
michael@0:               content.KeyEvent.DOM_VK_DOWN : content.KeyEvent.DOM_VK_UP;
michael@0:         evt.initKeyEvent(
michael@0:           "keypress", false, true, null, false, false, false, false, keycode, 0);
michael@0:         elem.dispatchEvent(evt);
michael@0:       }
michael@0:     }
michael@0:   }
michael@0: 
michael@0:   let position = Utils.getVirtualCursor(content.document).position;
michael@0:   if (!forwardToChild(aMessage, adjustRange, position)) {
michael@0:     sendUpDownKey(position);
michael@0:   }
michael@0: }
michael@0: addMessageListener(
michael@0:   'AccessFu:Start',
michael@0:   function(m) {
michael@0:     if (m.json.logLevel) {
michael@0:       Logger.logLevel = Logger[m.json.logLevel];
michael@0:     }
michael@0: 
michael@0:     Logger.debug('AccessFu:Start');
michael@0:     if (m.json.buildApp)
michael@0:       Utils.MozBuildApp = m.json.buildApp;
michael@0: 
michael@0:     addMessageListener('AccessFu:ContextMenu', activateContextMenu);
michael@0:     addMessageListener('AccessFu:Scroll', scroll);
michael@0:     addMessageListener('AccessFu:AdjustRange', adjustRange);
michael@0: 
michael@0:     if (!eventManager) {
michael@0:       eventManager = new EventManager(this);
michael@0:     }
michael@0:     eventManager.start();
michael@0: 
michael@0:     if (!contentControl) {
michael@0:       contentControl = new ContentControl(this);
michael@0:     }
michael@0:     contentControl.start();
michael@0: 
michael@0:     sendAsyncMessage('AccessFu:ContentStarted');
michael@0:   });
michael@0: 
michael@0: addMessageListener(
michael@0:   'AccessFu:Stop',
michael@0:   function(m) {
michael@0:     Logger.debug('AccessFu:Stop');
michael@0: 
michael@0:     removeMessageListener('AccessFu:ContextMenu', activateContextMenu);
michael@0:     removeMessageListener('AccessFu:Scroll', scroll);
michael@0: 
michael@0:     eventManager.stop();
michael@0:     contentControl.stop();
michael@0:   });
michael@0: 
michael@0: sendAsyncMessage('AccessFu:Ready');