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/* This Source Code Form is subject to the terms of the Mozilla Public
* License, v. 2.0. If a copy of the MPL was not distributed with this file,
* You can obtain one at http://mozilla.org/MPL/2.0/. */
/* global Components, XPCOMUtils, Utils, Logger, GestureSettings,
GestureTracker */
/* exported PointerRelay, PointerAdapter */
'use strict';
const Ci = Components.interfaces;
const Cu = Components.utils;
this.EXPORTED_SYMBOLS = ['PointerRelay', 'PointerAdapter']; // jshint ignore:line
Cu.import('resource://gre/modules/XPCOMUtils.jsm');
XPCOMUtils.defineLazyModuleGetter(this, 'Utils', // jshint ignore:line
'resource://gre/modules/accessibility/Utils.jsm');
XPCOMUtils.defineLazyModuleGetter(this, 'Logger', // jshint ignore:line
'resource://gre/modules/accessibility/Utils.jsm');
XPCOMUtils.defineLazyModuleGetter(this, 'GestureSettings', // jshint ignore:line
'resource://gre/modules/accessibility/Gestures.jsm');
XPCOMUtils.defineLazyModuleGetter(this, 'GestureTracker', // jshint ignore:line
'resource://gre/modules/accessibility/Gestures.jsm');
// The virtual touch ID generated by a mouse event.
const MOUSE_ID = 'mouse';
// Synthesized touch ID.
const SYNTH_ID = -1;
var PointerRelay = { // jshint ignore:line
/**
* A mapping of events we should be intercepting. Entries with a value of
* |true| are used for compiling high-level gesture events. Entries with a
* value of |false| are cancelled and do not propogate to content.
*/
get _eventsOfInterest() {
delete this._eventsOfInterest;
switch (Utils.widgetToolkit) {
case 'android':
this._eventsOfInterest = {
'touchstart' : true,
'touchmove' : true,
'touchend' : true };
break;
default:
// Desktop.
this._eventsOfInterest = {
'mousemove' : true,
'mousedown' : true,
'mouseup': true,
'click': false
};
if ('ontouchstart' in Utils.win) {
for (let eventType of ['touchstart', 'touchmove', 'touchend']) {
this._eventsOfInterest[eventType] = true;
}
}
break;
}
return this._eventsOfInterest;
},
_eventMap: {
'touchstart' : 'pointerdown',
'mousedown' : 'pointerdown',
'touchmove' : 'pointermove',
'mousemove' : 'pointermove',
'touchend' : 'pointerup',
'mouseup': 'pointerup'
},
start: function PointerRelay_start(aOnPointerEvent) {
Logger.debug('PointerRelay.start');
this.onPointerEvent = aOnPointerEvent;
for (let eventType in this._eventsOfInterest) {
Utils.win.addEventListener(eventType, this, true, true);
}
},
stop: function PointerRelay_stop() {
Logger.debug('PointerRelay.stop');
delete this.lastPointerMove;
delete this.onPointerEvent;
for (let eventType in this._eventsOfInterest) {
Utils.win.removeEventListener(eventType, this, true, true);
}
},
handleEvent: function PointerRelay_handleEvent(aEvent) {
// Don't bother with chrome mouse events.
if (Utils.MozBuildApp === 'browser' &&
aEvent.view.top instanceof Ci.nsIDOMChromeWindow) {
return;
}
if (aEvent.mozInputSource === Ci.nsIDOMMouseEvent.MOZ_SOURCE_UNKNOWN ||
aEvent.isSynthesized) {
// Ignore events that are scripted or clicks from the a11y API.
return;
}
let changedTouches = aEvent.changedTouches || [{
identifier: MOUSE_ID,
screenX: aEvent.screenX,
screenY: aEvent.screenY,
target: aEvent.target
}];
if (Utils.widgetToolkit === 'android' &&
changedTouches.length === 1 && changedTouches[0].identifier === 1) {
return;
}
if (changedTouches.length === 1 &&
changedTouches[0].identifier === SYNTH_ID) {
return;
}
aEvent.preventDefault();
aEvent.stopImmediatePropagation();
let type = aEvent.type;
if (!this._eventsOfInterest[type]) {
return;
}
let pointerType = this._eventMap[type];
this.onPointerEvent({
type: pointerType,
points: Array.prototype.map.call(changedTouches,
function mapTouch(aTouch) {
return {
identifier: aTouch.identifier,
x: aTouch.screenX,
y: aTouch.screenY
};
}
)
});
}
};
this.PointerAdapter = { // jshint ignore:line
start: function PointerAdapter_start() {
Logger.debug('PointerAdapter.start');
GestureTracker.reset();
PointerRelay.start(this.handleEvent);
},
stop: function PointerAdapter_stop() {
Logger.debug('PointerAdapter.stop');
PointerRelay.stop();
GestureTracker.reset();
},
handleEvent: function PointerAdapter_handleEvent(aDetail) {
let timeStamp = Date.now();
GestureTracker.handle(aDetail, timeStamp);
}
};
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