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/* -*- Mode: Java; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- /
/* vim: set shiftwidth=2 tabstop=2 autoindent cindent expandtab: */
'use strict';
/*
* Mouse2Touch is a shim that listens to MouseEvent but passes
* fake TouchEvent object to touch event handler
*
* XXX: remove this if we are not going to support testing on
* non-touch devices, e.g. B2G Desktop, Nightly, or,
* make the creation of this object optional if we can reliably detect
* touch support by evaluate (document instanceof DocumentTouch)
*
*/
var Mouse2Touch = (function m2t() {
var Mouse2TouchEvent = {
'mousedown': 'touchstart',
'mousemove': 'touchmove',
'mouseup': 'touchend'
};
var Touch2MouseEvent = {
'touchstart': 'mousedown',
'touchmove': 'mousemove',
'touchend': 'mouseup'
};
var ForceOnWindow = {
'touchmove': true,
'touchend': true
};
var addEventHandler = function m2t_addEventHandlers(target,
name,
listener) {
target = ForceOnWindow[name] ? window : target;
name = Touch2MouseEvent[name] || name;
target.addEventListener(name, {
handleEvent: function m2t_handleEvent(evt) {
if (Mouse2TouchEvent[evt.type]) {
var original = evt;
evt = {
type: Mouse2TouchEvent[original.type],
target: original.target,
touches: [original],
preventDefault: function() {
original.preventDefault();
}
};
evt.changedTouches = evt.touches;
}
return listener.handleEvent(evt);
}
}, true);
};
var removeEventHandler = function m2t_removeEventHandler(target,
name,
listener) {
target = ForceOnWindow[name] ? window : target;
name = Touch2MouseEvent[name] || name;
target.removeEventListener(name, listener);
};
return {
addEventHandler: addEventHandler,
removeEventHandler: removeEventHandler
};
})();
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