a mouse object for ExtendScript. This creates a new object called mouse which you can manually (only) update to keep track of your clicks. For example, on a right click you can use Mouse.setRight() to set the "last" property to 2 (mouse button of index 2). Then you can check if your latest click was a right click by calling Mouse.lastIsRight(), …

mouse.jsx

var Mouse = new (function () {
	var mouse = this;
	this.last = 0;

	this.setLeft = function () {
		mouse.last = 0;
	};
	this.setMiddle = function () {
		mouse.last = 1;
	};
	this.setRight = function () {
		mouse.last = 2;
	};

	this.set = function (num) {
		switch (num) {
			case 0:
				mouse.setLeft();
				break;
			case 1:
				mouse.setMiddle();
				break;
			case 2:
				mouse.setRight();
				break;
		}
	};

	this.lastIsLeft = function () {
		return mouse !== null && mouse.last == 0;
	};
	this.lastIsRight = function () {
		return mouse !== null && mouse.last == 2;
	};
	this.lastIsMiddle = function () {
		return mouse !== null && mouse.last == 1;
	};
})();