// ==UserScript==
// @name		cutt.ly URL shorten button
// @name:zh-TW		cutt.ly 縮短網址按鈕
// @name:zh-CN		cutt.ly 缩短网址按钮
// @description		set a URL-shorten button at the bottom left corner. It will create a new window for the shortened URL of cutt.ly
// @description:zh-TW	在頁面左下角設置一個縮短網址的按鈕，這會開個新視窗來檢視 cutt.ly 的縮址結果
// @description:zh-CN	在页面左下角设置一个缩短网址的按钮，这会开个新视窗来查看 cutt.ly 的缩址结果
// @namespace	https://greasyfork.org/zh-TW/users/393133-evan-tseng
// @version		0.13
// @author		Evan Tseng
// @run-at		document-end
// @include		*://*
// @exclude		http://cutt.ly/*
// @exclude		https://cutt.ly/*
// @grant		none
// @downloadURL none
// ==/UserScript==

(function() {
	'use strict';

	var addCuttButton = (function() {
		if(document.readyState == "interactive") {
			const newWindow = window.open,
				  CuttURL = 'https://cutt.ly/?shortenit=' + encodeURIComponent(location.href);

			let strWindowFeatures = 'width=500,height=874,top='+((screen.height-874)/4)+',left='+((screen.width-500)/2)+',menubar=no,toolbar=no,location=no,status=no',
				shortenWrap = null,
				shortenButton = null,
				cssStyle = document.createElement('style'),
				css = `.__shorten_wrap__ {position: fixed; bottom:25mm; left:-25pt; z-index:2147483647}
button.__shorten_url__ {font: 400 11pt Helvetica; color:#334; text-shadow:1px -1px rgba(255,255,255,.6); background:linear-gradient(3deg, rgba(170,170,175,.85) 0, rgba(210,210,215,.8) 50%, rgba(170,170,175,.85) 100%); padding: 0 .5em 1em; margin:0; line-height:2; border:1px solid rgba(0,0,0,.4); border-radius:5pt; cursor:pointer; transform:rotate(90deg); transition:.15s}
button.__shorten_url__:hover {background:linear-gradient(5deg, rgba(190,190,190,.95) 0, rgba(230,230,230,.95) 50%, rgba(190,190,190,.95) 100%); border:1px solid rgba(0,0,0,.4); box-shadow:1px 0 4pt rgba(0,0,0,.5)}
button.__shorten_url__:active {color:#cdf; text-shadow:-1px 1px #000; background:rgba(125,125,133,.8); border-color:rgba(255,255,255,.6); box-shadow:inset 1px 0 4pt rgba(0,0,0,.7); transition:0s}}`;
			if(cssStyle.styleSheet)	cssStyle.styleSheet.cssText = css;
			else	cssStyle.appendChild(document.createTextNode(css));
			document.querySelector('head').appendChild(cssStyle);

			shortenWrap = document.createElement('div');
			shortenWrap.setAttribute("class", "__shorten_wrap__");
			document.body.appendChild(shortenWrap);

			shortenButton = document.createElement('button');
			shortenButton.setAttribute("class", "__shorten_url__");
			shortenButton.innerText = "Cutt URL";
			shortenWrap.appendChild(shortenButton);
			shortenButton.addEventListener("click", function(){
				newWindow(CuttURL, "Cuttly URL", strWindowFeatures);
			});
		}
		else setTimeout(addCuttButton, 500);
	})();

})();