JS Link Grabber - Uses TextArea to Acquire Links Dropped onto Pages

linkgrabber.js

var LinkGrabber = {
	textarea: null,

	/* Textarea Management */

	attach_ta: function(){
		if(LinkGrabber.textarea != null) return;

		var textarea = LinkGrabber.textarea = document.createElement("textarea");
		textarea.setAttribute("style", "position: fixed; width: 100%; margin: 0; top: 0; bottom: 0; right: 0; left: 0; z-index: 99999999");
		textarea.style.opacity = "0.000000000000000001";

		var body = document.getElementsByTagName("body")[0];
		body.appendChild(textarea);

		textarea.oninput = LinkGrabber.evt_got_link;
	},

	detach_ta: function(){
		if(LinkGrabber.textarea == null) return;
		var textarea = LinkGrabber.textarea;

		textarea.parentNode.removeChild(textarea);
		LinkGrabber.textarea = null;
	},

	/* Event Handlers */

	evt_drag_over: function(){
		LinkGrabber.attach_ta(); //Create TA overlay
	},

	evt_got_link: function(){
		/* THIS IS WHERE WE HANDLE THE RECEIVED LINK */
		
		var link = LinkGrabber.textarea.value;

		alert(link);

		LinkGrabber.detach_ta();
	},

	evt_drag_out: function(e){
		if(e.target == LinkGrabber.textarea) LinkGrabber.detach_ta();
	},

	/* Start/Stop */

	start: function(){
		document.addEventListener("dragover", LinkGrabber.evt_drag_over, false);
		document.addEventListener("dragenter", LinkGrabber.evt_drag_over, false);

		document.addEventListener("mouseup", LinkGrabber.evt_drag_out, false);
		document.addEventListener("dragleave", LinkGrabber.evt_drag_out, false);
	},

	stop: function(){
		document.removeEventListener("dragover", LinkGrabber.evt_drag_over);
		document.removeEventListener("dragenter", LinkGrabber.evt_drag_over);

		document.removeEventListener("mouseup", LinkGrabber.evt_drag_out);
		document.removeEventListener("dragleave", LinkGrabber.evt_drag_out);

		LinkGrabber.detach_ta();
	}
};