Swyter Tweaks for Pandora

Provides non-stop music and puts the current song and artist on the title bar. \

You will need to install an extension such as Tampermonkey, Greasemonkey or Violentmonkey to install this script.

You will need to install an extension such as Tampermonkey to install this script.

You will need to install an extension such as Tampermonkey or Violentmonkey to install this script.

You will need to install an extension such as Tampermonkey or Userscripts to install this script.

You will need to install an extension such as Tampermonkey to install this script.

You will need to install a user script manager extension to install this script.

(I already have a user script manager, let me install it!)

You will need to install an extension such as Stylus to install this style.

You will need to install an extension such as Stylus to install this style.

You will need to install an extension such as Stylus to install this style.

You will need to install a user style manager extension to install this style.

You will need to install a user style manager extension to install this style.

You will need to install a user style manager extension to install this style.

(I already have a user style manager, let me install it!)

// ==UserScript==
// @name           Swyter Tweaks for Pandora
// @description    Provides non-stop music and puts the current song and artist on the title bar. \
//                 Additionally removes advertising, unblocks lyrics, provides a persistent skin selector, enforces the Pandora One layout and places a convenient download button. Nothing more, nothing less.
// @include        http*://www.pandora.com/*
// @version        2013.06.20
// @grant          GM_getValue
// @grant          GM_setValue
// @namespace https://greasyfork.org/users/4813
// ==/UserScript==

function thingie()
{
	/* find if the I'm listening button exists and click it if does */
	listen=document.getElementsByClassName("still_listening");
	
	if (listen.length > 0)
	{
		listen[0].click();
	}
	
	/* unlock lyrics */
	lyrics=document.querySelector(".lyricsText.unselectable");
	
	if (lyrics != null)
	{
		for (var i=lyrics.attributes.length; i-->0;)
		{
			lyrics.removeAttributeNode(lyrics.attributes[i]);
		}
		lyrics.classList.add("lyricsText");
	}
	
	/* direct the download link to the current song, redundant -- but should fix fixefox's strange behavior on mouse down (?) */
	download=document.getElementById("swydwnld");
	
	download.href=($.jPlayer.prototype.instances.jp_0.data('jPlayer').status.src);
	download.download=mysong.text+"-"+artist.text+"."+($.jPlayer.prototype.instances.jp_0.data('jPlayer').status.formatType || "m4a");
	
	/* calls itself every 6s */
	setTimeout(thingie,6*1000);
}

/* set the Pandora One centered layout */
document.documentElement.classList.add("width-p1-noAds");

/* get rid of the in-page advertising container */
if(ads=document.getElementById("ad_container"))
{
	ads.parentNode.removeChild(ads);
}

/* let's hook the AJAX requests and filter out the audio ads and user tracking */
XMLHttpRequest.prototype.upon = XMLHttpRequest.prototype.open;
XMLHttpRequest.prototype.open = function(method,url)
{
	if(url.match(/proxyAdRequest|mediaserverPublicRedirect|brokenAd|stats|andomedia|tritondigital|doubleclick|imrworldwide|scorecardresearch|analytics/) != null)
	{
		console.info("Audio ad intercepted!",arguments);
		this.abort();
	}
	else
	{
		this.upon.apply(this,arguments);
	}
}

/* pick the song and artist fields */
mysong=document.getElementsByClassName("playerBarSong")[0];
artist=document.getElementsByClassName("playerBarArtist")[0];

/* add a download button for the current song */
document.getElementsByClassName("buttons")[1].innerHTML+="<a id='swydwnld' \
                                                         target='_blank' \
                                                          class='button btn_bg' \
                                                          style='text-decoration:none; font-size:11px; width:52px; padding-left:3px; color:inherit;'> \
                                                         <span style='background:url(data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAAAsAAAAMCAYAAAC0qUeeAAAA6klEQVR42o2QvQ6CMBSFuzk4OLojccCGAkZNFKQwEPCnZfEBnHxB38LER/AR1EkXpd5bfyJGjDc5adp+57T3EvJWDpd7a5AW7W6m3Egq3JOqcrg4U3+mbNR4jioqYTfKj2DQIAOZ/bQa9rg8PWEUHU3VXzALwOD/gF0uDywU+gsI02FWhhkXa+z6LlHgFLS4noaeCL4IASvSTJI6C+XWi+QFGlRunKuXAfcgMGyIadZ0umF0G2DYOXF+fRq8xwrnBxpnrdJ36EDYcLF/JBUa5F/AV4NBZmESGjDZ4pOU/KpksYyxqU6Y9j7vbuvheB+14VYeAAAAAElFTkSuQmCC) no-repeat 2px 1px;padding-right:17px;'></span>Download</a>";
download=document.getElementById("swydwnld");
download.addEventListener("mouseover",function(e)
{
	e.target.href=($.jPlayer.prototype.instances.jp_0.data('jPlayer').status.src);
	e.target.download=mysong.text+"-"+artist.text+"."+($.jPlayer.prototype.instances.jp_0.data('jPlayer').status.formatType || "m4a");
})

/* backup the original title */
original_title=document.title;

/* whenever the info dock changes */
info=document.getElementsByClassName("info")[0];
info.addEventListener("DOMNodeInserted",function()
{
	/* set the title bar to the current song */
	document.title=(mysong.text.length > 0 &&
	                artist.text.length > 0) ? ("Now playing «"+mysong.text+"» by «"+artist.text+"»") : original_title;

	/* direct the download link to the current song, redundant -- but should fix fixefox's strange behavior on mouse down (?) */
	download=document.getElementById("swydwnld");
	
	download.href=($.jPlayer.prototype.instances.jp_0.data('jPlayer').status.src);
	download.download=mysong.text+"-"+artist.text+"."+($.jPlayer.prototype.instances.jp_0.data('jPlayer').status.formatType || "m4a");
})

/* unlock theme chooser */
sknTab=document.getElementById("skinTab");
sknTab.style.display="inherit";

/* create a new css link and pin it on the document's head, we'll be using it later */
link=document.createElement("link");
link.rel="stylesheet";

document.head.appendChild(link);


/* ugly jquery callback, launched whenever a theme-preview-button-thingie is clicked */
$(document).on("mouseup",".skin_definition_container",function(e)
{

    /* pick our id from .skin_definition_container > a > img[src="/preview_{skinid}.png"] */
	skin_name=e.currentTarget.children[0].children[0].src.match(/preview_(.+)\.png$/)[1];
	
	/* a few of the preview ids don't match with their css counterparts, if that's the case, fallback... to the pandora designers: that's malapraxis */
	skin_name=(
	{    "default": "pandoraone",
	      "cosmic": "cosmicrift",
	         "sea": "deepseadisco"
    }[skin_name]) || skin_name;

	skin_set();
	
	console.log("New theme selected!",skin_name);
})


function skin_set()
{
	/* set our previously made CSS link to the selection */
	link.href="http://www.pandora.com/static/pandora_one/skins/"+skin_name+"/skin.css";
	
	/* store as persistent preference */
	try{ GM_setValue('swyPandoraTheme', skin_name) }catch(e){ localStorage['swyPandoraTheme']=skin_name}
}

/* restore a theme in case it has been selected previously. ugly, i know */
try{ skin_name = GM_getValue('swyPandoraTheme') || skin_name }catch(e){ skin_name = localStorage['swyPandoraTheme'] || skin_name }; skin_set()

/* call the recurrent function */
thingie();