1.1 --- /dev/null Thu Jan 01 00:00:00 1970 +0000
1.2 +++ b/accessible/src/jsat/PointerAdapter.jsm Wed Dec 31 06:09:35 2014 +0100
1.3 @@ -0,0 +1,206 @@
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 +/* global Components, XPCOMUtils, Utils, Logger, GestureSettings,
1.9 + GestureTracker */
1.10 +/* exported PointerRelay, PointerAdapter */
1.11 +
1.12 +'use strict';
1.13 +
1.14 +const Ci = Components.interfaces;
1.15 +const Cu = Components.utils;
1.16 +
1.17 +this.EXPORTED_SYMBOLS = ['PointerRelay', 'PointerAdapter']; // jshint ignore:line
1.18 +
1.19 +Cu.import('resource://gre/modules/XPCOMUtils.jsm');
1.20 +
1.21 +XPCOMUtils.defineLazyModuleGetter(this, 'Utils', // jshint ignore:line
1.22 + 'resource://gre/modules/accessibility/Utils.jsm');
1.23 +XPCOMUtils.defineLazyModuleGetter(this, 'Logger', // jshint ignore:line
1.24 + 'resource://gre/modules/accessibility/Utils.jsm');
1.25 +XPCOMUtils.defineLazyModuleGetter(this, 'GestureSettings', // jshint ignore:line
1.26 + 'resource://gre/modules/accessibility/Gestures.jsm');
1.27 +XPCOMUtils.defineLazyModuleGetter(this, 'GestureTracker', // jshint ignore:line
1.28 + 'resource://gre/modules/accessibility/Gestures.jsm');
1.29 +
1.30 +// The virtual touch ID generated by a mouse event.
1.31 +const MOUSE_ID = 'mouse';
1.32 +// Synthesized touch ID.
1.33 +const SYNTH_ID = -1;
1.34 +
1.35 +let PointerRelay = { // jshint ignore:line
1.36 + /**
1.37 + * A mapping of events we should be intercepting. Entries with a value of
1.38 + * |true| are used for compiling high-level gesture events. Entries with a
1.39 + * value of |false| are cancelled and do not propogate to content.
1.40 + */
1.41 + get _eventsOfInterest() {
1.42 + delete this._eventsOfInterest;
1.43 +
1.44 + switch (Utils.widgetToolkit) {
1.45 + case 'gonk':
1.46 + this._eventsOfInterest = {
1.47 + 'touchstart' : true,
1.48 + 'touchmove' : true,
1.49 + 'touchend' : true,
1.50 + 'mousedown' : false,
1.51 + 'mousemove' : false,
1.52 + 'mouseup': false,
1.53 + 'click': false };
1.54 + break;
1.55 +
1.56 + case 'android':
1.57 + this._eventsOfInterest = {
1.58 + 'touchstart' : true,
1.59 + 'touchmove' : true,
1.60 + 'touchend' : true,
1.61 + 'mousemove' : true,
1.62 + 'mouseenter' : true,
1.63 + 'mouseleave' : true,
1.64 + 'mousedown' : false,
1.65 + 'mouseup': false,
1.66 + 'click': false };
1.67 + break;
1.68 +
1.69 + default:
1.70 + // Desktop.
1.71 + this._eventsOfInterest = {
1.72 + 'mousemove' : true,
1.73 + 'mousedown' : true,
1.74 + 'mouseup': true,
1.75 + 'click': false
1.76 + };
1.77 + if ('ontouchstart' in Utils.win) {
1.78 + for (let eventType of ['touchstart', 'touchmove', 'touchend']) {
1.79 + this._eventsOfInterest[eventType] = true;
1.80 + }
1.81 + }
1.82 + break;
1.83 + }
1.84 +
1.85 + return this._eventsOfInterest;
1.86 + },
1.87 +
1.88 + _eventMap: {
1.89 + 'touchstart' : 'pointerdown',
1.90 + 'mousedown' : 'pointerdown',
1.91 + 'mouseenter' : 'pointerdown',
1.92 + 'touchmove' : 'pointermove',
1.93 + 'mousemove' : 'pointermove',
1.94 + 'touchend' : 'pointerup',
1.95 + 'mouseup': 'pointerup',
1.96 + 'mouseleave': 'pointerup'
1.97 + },
1.98 +
1.99 + start: function PointerRelay_start(aOnPointerEvent) {
1.100 + Logger.debug('PointerRelay.start');
1.101 + this.onPointerEvent = aOnPointerEvent;
1.102 + for (let eventType in this._eventsOfInterest) {
1.103 + Utils.win.addEventListener(eventType, this, true, true);
1.104 + }
1.105 + },
1.106 +
1.107 + stop: function PointerRelay_stop() {
1.108 + Logger.debug('PointerRelay.stop');
1.109 + delete this.lastPointerMove;
1.110 + delete this.onPointerEvent;
1.111 + for (let eventType in this._eventsOfInterest) {
1.112 + Utils.win.removeEventListener(eventType, this, true, true);
1.113 + }
1.114 + },
1.115 +
1.116 + _suppressPointerMove: function PointerRelay__suppressPointerMove(aChangedTouches) {
1.117 + if (!this.lastPointerMove) {
1.118 + return false;
1.119 + }
1.120 + for (let i = 0; i < aChangedTouches.length; ++i) {
1.121 + let touch = aChangedTouches[i];
1.122 + let lastTouch;
1.123 + try {
1.124 + lastTouch = this.lastPointerMove.identifiedTouch ?
1.125 + this.lastPointerMove.identifiedTouch(touch.identifier) :
1.126 + this.lastPointerMove[i];
1.127 + } catch (x) {
1.128 + // Sometimes touch object can't be accessed after page navigation.
1.129 + }
1.130 + if (!lastTouch || lastTouch.target !== touch.target ||
1.131 + Math.hypot(touch.screenX - lastTouch.screenX, touch.screenY -
1.132 + lastTouch.screenY) / Utils.dpi >= GestureSettings.travelThreshold) {
1.133 + return false;
1.134 + }
1.135 + }
1.136 + return true;
1.137 + },
1.138 +
1.139 + handleEvent: function PointerRelay_handleEvent(aEvent) {
1.140 + // Don't bother with chrome mouse events.
1.141 + if (Utils.MozBuildApp === 'browser' &&
1.142 + aEvent.view.top instanceof Ci.nsIDOMChromeWindow) {
1.143 + return;
1.144 + }
1.145 + if (aEvent.mozInputSource === Ci.nsIDOMMouseEvent.MOZ_SOURCE_UNKNOWN) {
1.146 + // Ignore events that are scripted or clicks from the a11y API.
1.147 + return;
1.148 + }
1.149 +
1.150 + let changedTouches = aEvent.changedTouches || [{
1.151 + identifier: MOUSE_ID,
1.152 + screenX: aEvent.screenX,
1.153 + screenY: aEvent.screenY,
1.154 + target: aEvent.target
1.155 + }];
1.156 +
1.157 + if (changedTouches.length === 1 &&
1.158 + changedTouches[0].identifier === SYNTH_ID) {
1.159 + return;
1.160 + }
1.161 +
1.162 + aEvent.preventDefault();
1.163 + aEvent.stopImmediatePropagation();
1.164 +
1.165 + let type = aEvent.type;
1.166 + if (!this._eventsOfInterest[type]) {
1.167 + return;
1.168 + }
1.169 + let pointerType = this._eventMap[type];
1.170 + if (pointerType === 'pointermove') {
1.171 + if (this._suppressPointerMove(changedTouches)) {
1.172 + // Do not fire pointermove more than every POINTERMOVE_THROTTLE.
1.173 + return;
1.174 + }
1.175 + this.lastPointerMove = changedTouches;
1.176 + }
1.177 + this.onPointerEvent({
1.178 + type: pointerType,
1.179 + points: Array.prototype.map.call(changedTouches,
1.180 + function mapTouch(aTouch) {
1.181 + return {
1.182 + identifier: aTouch.identifier,
1.183 + x: aTouch.screenX,
1.184 + y: aTouch.screenY
1.185 + };
1.186 + }
1.187 + )
1.188 + });
1.189 + }
1.190 +};
1.191 +
1.192 +this.PointerAdapter = { // jshint ignore:line
1.193 + start: function PointerAdapter_start() {
1.194 + Logger.debug('PointerAdapter.start');
1.195 + GestureTracker.reset();
1.196 + PointerRelay.start(this.handleEvent);
1.197 + },
1.198 +
1.199 + stop: function PointerAdapter_stop() {
1.200 + Logger.debug('PointerAdapter.stop');
1.201 + PointerRelay.stop();
1.202 + GestureTracker.reset();
1.203 + },
1.204 +
1.205 + handleEvent: function PointerAdapter_handleEvent(aDetail) {
1.206 + let timeStamp = Date.now();
1.207 + GestureTracker.handle(aDetail, timeStamp);
1.208 + }
1.209 +};
