event-move.js revision 1ef3baa403986374362a3287c4aa7ddb032e1684
YUI.add('event-move', function(Y) {
// TODO: Better way to sniff 'n' switch touch support?
var EVENT = ("ontouchstart" in Y.config.win) ? {
start: "touchstart",
move: "touchmove",
end: "touchend"
} : {
start: "mousedown",
move: "mousemove",
end: "mouseup"
},
START = "start",
MOVE = "move",
END = "end",
_MOVE_START_HANDLE = "_msh",
_MOVE_HANDLE = "_mh",
_MOVE_END_HANDLE = "_meh",
_MOVE_START = "_ms",
_MOVE = "_m",
MIN_TIME = "minTime",
MIN_DISTANCE = "minDistance",
OWNER_DOCUMENT = "ownerDocument",
NODE_TYPE = "nodeType",
PUB_CFG = {
emitFacade:false
},
// TODO: Should this be in SynthEvent as the default?
_defArgsProcessor = function(args) {
return args[3] ? args.splice(3,1)[0] : {};
},
_getRoot = function(node, subscriber) {
return subscriber._extra.root || (node.get(NODE_TYPE) === 9) ? node : node.get(OWNER_DOCUMENT);
},
define = Y.Event.define;
define('movestart', {
init: function (node, subscriber, ce) {
node.setData(_MOVE_START_HANDLE, node.on(EVENT[START],
this._onStart,
this,
node,
subscriber,
ce));
},
destroy: function (node, subscriber, ce) {
var startHandle = node.getData(_MOVE_START_HANDLE);
if (startHandle) {
startHandle.detach();
node.clearData(_MOVE_START_HANDLE);
}
},
processArgs : function(args) {
var params = _defArgsProcessor(args);
if (!(MIN_TIME in params)) {
params[MIN_TIME] = this.MIN_TIME;
}
if (!(MIN_DISTANCE in params)) {
params[MIN_DISTANCE] = this.MIN_DISTANCE;
}
return params;
},
publishConfig: PUB_CFG,
_onStart : function(e, node, subscriber, ce) {
e.preventDefault();
var origE = e,
params = subscriber._extra,
start = true,
minTime = params.minTime,
minDistance = params.minDistance,
button = params.button,
root = _getRoot(node, subscriber),
startXY;
if (e.touches) {
start = (e.touches.length === 1);
e = e.touches[0];
e.target = e.target || origE.target;
e.currentTarget = e.currentTarget || origE.currentTarget;
} else {
start = (button === undefined) || (button = e.button);
}
if (start) {
if (minTime === 0 || minDistance === 0) {
this._start(e, node, ce, params);
} else {
startXY = [e.pageX, e.pageY];
if (minTime > 0) {
params._ht = Y.later(minTime, this, this._start, [e, node, ce, params]);
params._hme = root.on(EVENT[END], Y.bind(function() {
this._cancel(params);
}, this));
}
if (minDistance > 0) {
params._hm = root.on(EVENT[MOVE], Y.bind(function(em) {
if (Math.abs(em.pageX - startXY[0]) > minDistance || Math.abs(em.pageY - startXY[1]) > minDistance) {
this._start(e, node, ce, params);
}
}, this));
}
}
}
},
_cancel : function(params) {
if (params._ht) {
params._ht.cancel();
params._ht = null;
}
if (params._hme) {
params._hme.detach();
params._hme = null;
}
if (params._hm) {
params._hm.detach();
params._hm = null;
}
},
_start : function(e, node, ce, params) {
if (params) {
this._cancel(params);
}
e.type = "movestart";
node.setData(_MOVE_START, e);
ce.fire(e);
},
MIN_TIME : 0,
MIN_DISTANCE : 0
});
define('move', {
init : function (node, subscriber, ce) {
var root = _getRoot(node, subscriber),
moveHandle = root.on(EVENT[MOVE],
this._onMove,
this,
node,
subscriber,
ce);
node.setData(_MOVE_HANDLE, moveHandle);
},
processArgs : _defArgsProcessor,
destroy : function (node, subscriber, ce) {
var moveHandle = node.getData(_MOVE_HANDLE);
if (moveHandle) {
moveHandle.detach();
node.clearData(_MOVE_HANDLE);
}
},
publishConfig : PUB_CFG,
_onMove : function(e, node, subscriber, ce) {
var move = subscriber._extra.standAlone || node.getData(_MOVE_START),
origE = e;
if (move) {
if (e.touches) {
move = (e.touches.length === 1);
e = e.touches[0];
e.target = e.target || origE.target;
e.currentTarget = e.currentTarget || origE.currentTarget;
}
if (move) {
origE.preventDefault();
e.type = "move";
node.setData(_MOVE, e);
ce.fire(e);
}
}
}
});
define('moveend', {
init : function (node, subscriber, ce) {
var root = _getRoot(node, subscriber),
endHandle = root.on(EVENT[END],
this._onEnd,
this,
node,
subscriber,
ce);
node.setData(_MOVE_END_HANDLE, endHandle);
},
processArgs : _defArgsProcessor,
destroy : function (node, subscriber, ce) {
var endHandle = node.getData(_MOVE_END_HANDLE);
if (endHandle) {
endHandle.detach();
node.clearData(_MOVE_END_HANDLE);
}
},
publishConfig : PUB_CFG,
_onEnd : function(e, node, subscriber, ce) {
var moveEnd = subscriber._extra.standAlone || node.getData(_MOVE) || node.getData(_MOVE_START),
origE = e;
if (moveEnd) {
if (e.changedTouches) {
if (e.changedTouches.length === 1) {
e = e.changedTouches[0];
e.target = e.target || origE.target;
e.currentTarget = e.currentTarget || origE.currentTarget;
} else {
moveEnd = false;
}
}
if (moveEnd) {
origE.preventDefault();
e.type = "moveend";
node.clearData(_MOVE_START);
node.clearData(_MOVE);
ce.fire(e);
}
}
}
});
}, '@VERSION@' ,{requires:['node-base','event-touch','event-synthetic']});