long middle click == shift + middle click

middleClickFocusTab.uc.js

// ==UserScript==
// @name           middleClickFocusTab.uc.js
// @description    long middle click == shift + middle click
// @include        main
// @charset        utf-8
// @compatibility  Firefox 3.6+
// @namespace      http://twitter.com/xulapp
// @author         xulapp
// @license        MIT License
// @version        2010/11/22 00:50 +09:00
// ==/UserScript==
// @version        2010/10/13 00:30 +09:00


(function middleClickFocusTab() {
	const TIMEOUT = 300;
	const TARGET_XPATH = 'ancestor-or-self::html:a | ancestor-or-self::html:area | ancestor-or-self::xul:toolbarbutton | ancestor-or-self::xul:*[@onclick] | ancestor-or-self::*[@xlink:href]';
	const NAMESPACE = {
		xul: 'http://www.mozilla.org/keymaster/gatekeeper/there.is.only.xul',
		html: 'http://www.w3.org/1999/xhtml',
		xlink: 'http://www.w3.org/1999/xlink',
	};
	const resolveNS = function resolveNS(name) NAMESPACE[name];

	const tooltip = document.createElementNS(NAMESPACE.xul, 'tooltip');
	tooltip.setAttribute('id', 'longclick-tooltip');
	tooltip.setAttribute('label', '\u9577\u62bc\u3057');
	document.getElementById('mainPopupSet').appendChild(tooltip);

	document.addEventListener('mousedown', function({originalTarget, button, screenX, screenY}) {
		if (button !== 1) return;

		var clickable = originalTarget.ownerDocument.evaluate(
			TARGET_XPATH,
			originalTarget,
			resolveNS,
			XPathResult.BOOLEAN_TYPE,
			null
		).booleanValue;
		if (!clickable) return;

		first([
			function(next) timeout(next, TIMEOUT, null),
			function(next) listen(document, 'mouseup', next, true, false),
		], function(e) {
			if (e) return;
			tooltip.openPopupAtScreen(screenX, screenY);

			listenOnce(document, 'mouseup', function onMouseUp(event) {
				tooltip.hidePopup();
				if (event.originalTarget !== originalTarget) return;

				listenOnce(document, 'click', function onClick(event) {
					var {shiftKey} = event;
					event.__defineGetter__('shiftKey', function() !shiftKey);
				}, true, false);
			}, true, false);
		});
	}, false, false);

	function timeout() {
		var timer = setTimeout.apply(null, arguments);
		return function() clearTimeout(timer);
	}
	function listen(node) {
		var args = Array.slice(arguments, 1);
		node.addEventListener.apply(node, args);
		return function() node.removeEventListener.apply(node, args);
	}
	function listenOnce() {
		var args = Array.slice(arguments);
		var listener = args[2];
		args[2] = function onceGate() {
			cancel();
			return listener.apply(this, arguments);
		};
		var cancel = listen.apply(null, args);
		return cancel;
	}
	function first(tasks, callback) {
		var closed = false;
		var cancelers = [];
		var next = function(arg) {
			if (closed) return;
			callback(arg);
			close();
		};
		var close = function() {
			cancelers.forEach(function(fn) fn());
			closed = true;
		};
		tasks.some(function(fn) {
			var abort = fn(next);
			if (closed)
				return true;
			if (typeof abort === 'function')
				cancelers.push(abort);
		});
		return close;
	}
})();