[TS] deviantART Gallery Pager

Auto-pager for DeviantArt gallery/favourites. On-top of FireFox, it now works with G-Chrome and Opera. NOW: With sticky paging button switch.
Versión del día 16/01/2015. Echa un vistazo a la versión más reciente.
Instalar este script ¿?
Pregunta tus dudas, ponle nota o notifica una posible infracción de las normas.
Ajuste de línea
// ==UserScript==
// @name            [TS] deviantART Gallery Pager
// @namespace       TimidScript
// @version         1.0.7
// @description     Auto-pager for DeviantArt gallery/favourites. On-top of FireFox, it now works with G-Chrome and Opera. NOW: With sticky paging button switch.
// @icon            https://i.imgur.com/1KiUR7g.png
// @author          TimidScript
// @homepageURL     https://openuserjs.org/users/TimidScript
// @copyright       © 2014 TimidScript, All Rights Reserved.
// @license         Creative Commons BY-NC-SA + Please notify me if distributing
// @include         http://*.deviantart.com/gallery/*
// @include         http://*.deviantart.com/favourites/*
// @require         https://openuserjs.org/src/libs/TimidScript/TSL_-_GM_Update.js
// @homeURL         https://openuserjs.org/scripts/TimidScript/[TS]_deviantART_Gallery_Pager
// @grant           GM_xmlhttpRequest
// @grant           GM_info
// @grant           GM_getMetadata
// @grant           GM_getValue
// @grant           GM_setValue
// @grant           GM_addStyle
// @grant           GM_deleteValue
// @grant           GM_registerMenuCommand
// ==/UserScript==


/* Information
**************************************************************************************************
Copyright © 2014 TimidScript, All Rights Reserved.
Script's Homepage:              Check homepages below

TimidScript's Homepage:         https://openuserjs.org/users/TimidScript
                                https://greasyforks.org/users/1455-timidscript
                                https://monkeyguts.com/author.php?un=timidscript

                                http://userscripts.org/users/TimidScript
                                http://userscripts-mirror.org/users/100610/scripts

From FireFox verion 34.0.5, window.scrollMaxY only returns the max scrollable value and does not return
the document height as before. Before the two were snonymous or at least that's how it use to work as far
as a I can remember.

------------------------------------
 Version History
------------------------------------
1.0.8 (2015-01-16)
 - Bug fix to paging as it did not work in high resolution.
 - Paging button added. It saves last setting.
 - Added a setting to update url to the last page loaded. Remove the commenting from: GM_setValue("UpdateURL",1);
1.0.7 (2015-01-09)
 - Big fix due favourites paging due to changes in divantArt site
 - Take into account favourites folders when working out scrollOffsetExtra.
1.0.6 (2015-01-02)
 - At least from Firefox version 34.0.5 window.scrollMaxY value no longer returns the max scrollable document
 value. Replaced it with document.documentElement.scrollHeight.
//From version 34.# of FF scrollMaxY no longer returns
1.0.5 (2014-11-01)
 - Bug fix: Check if comments are present in the gallery
 - Bug fix: Loading icon gets removed now when you change page
1.0.4 (2014-10-31)
 - Fix to support other browsers beside FireFox
1.0.3 (2014-08-29)
 - Added GM_update
1.0.2 (2014-08-19)
 - Cleaned up header for OUJS
1.0.1 (2013-02-27)
 - Initial Release
**************************************************************************************************/
console.info("DeviantScript Gallery Pager");
/************** Variable you can set **************/
//GM_setValue("UpdateURL", 1) //Turn on update URL
//GM_deleteValue("UpdateURL") //Turn off update URL
/**************************************************/

var scrollOffset = 500;
var addPagination = true; //Adds page divider
var gmi = document.querySelector("#gmi-GZone[gmi-name='top_left']");

var intervalID = 0;
var nextPageURL = null;
var galleryPager = document.getElementById("gallery_pager");
var pagerSwitch;

AddPagerSwitch();
if (pagerSwitch.value == 1 && GetNextPageURL(document)) intervalID = setInterval(CheckScrollPosition, 200);

var loading = 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function AddPagerSwitch()
{
    var holder = document.createElement("div");
    pagerSwitch = document.createElement("button");
    holder.appendChild(pagerSwitch);
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        + "background: -webkit-linear-gradient(center top , #ED7968, #EB462D) repeat scroll 0% 0% transparent;"
        + "background: -o-linear-gradient(center top , #ED7968, #EB462D) repeat scroll 0% 0% transparent;}"
        + ".smbutton-red2:hover {background:linear-gradient(center top , #ED9588, #E9604B) repeat scroll 0% 0% transparent;"
        + "background: -moz-linear-gradient(center top , #ED9588, #E9604B) repeat scroll 0% 0% transparent;"
        + "background: -webkit-linear-gradient(center top , #ED9588, #E9604B) repeat scroll 0% 0% transparent;"
        + "background: -o-linear-gradient(center top , #ED9588, #E9604B) repeat scroll 0% 0% transparent;}"
        + ".smbutton-dead, .smbutton-dead:hover  {background:linear-gradient(center top , #A39F9F, #787473) repeat scroll 0% 0% transparent;"
        + "background: -moz-linear-gradient(center top , #A39F9F, #787473) repeat scroll 0% 0% transparent;"
        + "background: -webkit-linear-gradient(center top , #A39F9F, #787473) repeat scroll 0% 0% transparent;"
        + "background: -o-linear-gradient(center top , #A39F9F, #787473) repeat scroll 0% 0% transparent;}"
        );

    GM_addStyle(".smbutton-red2 {bac}");

    document.querySelector("#gmi-GZone[gmi-name='sidebar1']").insertBefore(holder, document.querySelector("#gmi-GZone[gmi-name='sidebar1']").firstElementChild);
    pagerSwitch.textContent = "Auto-Pager";
    pagerSwitch.value = GM_getValue("Paging", 1);
    pagerSwitch.className = (pagerSwitch.value == 1) ? "smbutton smbutton-green" : "smbutton smbutton-red2";

    pagerSwitch.onclick = function ()
    {
        if (pagerSwitch.value == -1) return;

        if (pagerSwitch.value == 1)
        {
            clearInterval(intervalID);
            pagerSwitch.value = 0;
            pagerSwitch.className = "smbutton smbutton-red2";
        }
        else
        {
            intervalID = setInterval(CheckScrollPosition, 200);
            pagerSwitch.value = 1;
            pagerSwitch.className = "smbutton smbutton-green";
        }
        GM_setValue("Paging", pagerSwitch.value);
    }
}

function CheckScrollPosition()
{
    var posBottom = getAbsolutePosition(gmi).top + gmi.offsetHeight;
    if (window.innerHeight + window.scrollY > posBottom - scrollOffset)
    {
        GetNextPage();
    }

    function getAbsolutePosition(element)
    {
        var x = 0;
        var y = 0;

        while (element && !isNaN(element.offsetLeft) && !isNaN(element.offsetTop))
        {
            x += element.offsetLeft;
            y += element.offsetTop;
            element = element.offsetParent;
        }
        return { top: y, left: x };
    }
}

function GetNextPageURL(doc)
{
    var next = (doc.querySelector(".folderview.ch")) ? doc.querySelector(".folderview-art > .pagination-wrapper li.next a.away") : doc.querySelector("li.next a.away");

    if (next)
    {
        nextPageURL = next.href;
        return true;
    }

    pagerSwitch.value = -1;
    pagerSwitch.className = "smbutton smbutton-dead";
    nextPageURL = null;
    return false;
}

function GetNextPage()
{
    clearInterval(intervalID);

    var div = document.createElement("div");
    div.id = "deviantscript";
    img = document.createElement("img");
    img.src = loading;
    div.appendChild(img);
    document.getElementById("gmi-GPage").appendChild(div);
    w = Math.round(img.clientWidth / 2);
    div.setAttribute("style", "position: fixed; z-index: 999; bottom: 50%; left: 50%; margin: 0 0 0 -" + w + "px;");


    var xhr = new XMLHttpRequest();
    xhr.open("GET", nextPageURL, true);
    //xhr.responseType = "document"; //Causes issues in Opera
    xhr.onload = function (e)
    {
        if (xhr.readyState == 4)
        {
            if (xhr.status == 200)
            {
                //var xdoc = xhr.response; //Causes issues in opera;
                //var xdoc = document.createElement("xml");
                //xdoc.innerHTML = xhr.responseText;

                var xdoc = document.implementation.createHTMLDocument('MPIV');
                xdoc.documentElement.innerHTML = xhr.responseText;

                if (xdoc.querySelector(".folderview.ch"))
                {
                    gmi.appendChild(xdoc.querySelector("#gmi-GZone[gmi-name='top_left'] #gmi-GMFrame_Gruser").cloneNode(true));
                }
                else
                {
                    gmi.appendChild(xdoc.querySelector("#gmi-ResourceStream, #gmi-EditableResourceStream").cloneNode(true));
                    if (addPagination) gmi.appendChild(xdoc.getElementsByClassName("pagination")[0].parentElement.cloneNode(true));
                }

                if (GM_getValue("UpdateURL")) window.history.pushState(null, "", xhr.responseURL);
                if (GetNextPageURL(xdoc)) intervalID = setInterval(CheckScrollPosition, 200);
            } else
            {
                console.error(xhr.statusText);
            }
        }
        document.getElementById("deviantscript").parentNode.removeChild(document.getElementById("deviantscript"));
    };
    xhr.onerror = function (e)
    {
        document.getElementById("deviantscript").parentNode.removeChild(document.getElementById("deviantscript"));
        console.error(xhr.statusText);
    };
    xhr.send(null);
}