You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
58 lines
1.7 KiB
58 lines
1.7 KiB
2 years ago
|
var trigger = require('./trigger');
|
||
|
|
var root = require('./root');
|
||
|
|
var hasTouchSupport = 'ontouchstart' in root;
|
||
|
|
exports = function() {
|
||
|
|
var el =
|
||
|
|
arguments.length > 0 && arguments[0] !== undefined
|
||
|
|
? arguments[0]
|
||
|
|
: document;
|
||
|
|
if (hasTouchSupport) return;
|
||
|
|
if (el._isEmulated) return;
|
||
|
|
el._isEmulated = true;
|
||
|
|
el.addEventListener('mousedown', onMouse('touchstart'), true);
|
||
|
|
el.addEventListener('mousemove', onMouse('touchmove'), true);
|
||
|
|
el.addEventListener('mouseup', onMouse('touchend'), true);
|
||
|
|
};
|
||
|
|
function onMouse(type) {
|
||
|
|
return function(e) {
|
||
|
|
if (e.which !== 1) return;
|
||
|
|
trigger(e.target, type, {
|
||
|
|
altKey: e.altKey,
|
||
|
|
ctrlKey: e.ctrlKey,
|
||
|
|
metaKey: e.metaKey,
|
||
|
|
shiftKey: e.shiftKey,
|
||
|
|
touches: getActiveTouches(e),
|
||
|
|
targetTouches: getActiveTouches(e),
|
||
|
|
changedTouches: createTouchList(e)
|
||
|
|
});
|
||
|
|
};
|
||
|
|
}
|
||
|
|
function getActiveTouches(e) {
|
||
|
|
if (e.type == 'mouseup') return createTouchList();
|
||
|
|
return createTouchList(e);
|
||
|
|
}
|
||
|
|
function Touch(target, identifier, pos, deltaX, deltaY) {
|
||
|
|
deltaX = deltaX || 0;
|
||
|
|
deltaY = deltaY || 0;
|
||
|
|
this.identifier = identifier;
|
||
|
|
this.target = target;
|
||
|
|
this.clientX = pos.clientX + deltaX;
|
||
|
|
this.clientY = pos.clientY + deltaY;
|
||
|
|
this.screenX = pos.screenX + deltaX;
|
||
|
|
this.screenY = pos.screenY + deltaY;
|
||
|
|
this.pageX = pos.pageX + deltaX;
|
||
|
|
this.pageY = pos.pageY + deltaY;
|
||
|
|
}
|
||
|
|
function createTouchList(e) {
|
||
|
|
var touchList = [];
|
||
|
|
touchList.item = function(index) {
|
||
|
|
return this[index] || null;
|
||
|
|
};
|
||
|
|
if (e) {
|
||
|
|
touchList.push(new Touch(e.target, 1, e, 0, 0));
|
||
|
|
}
|
||
|
|
return touchList;
|
||
|
|
}
|
||
|
|
|
||
|
|
module.exports = exports;
|