Makes any(?) page with a paginator on various Danbooru clones "bottomless"--blend pages seamlessly or separate each with a paginator.
// ==UserScript==
// @name Unlimited Paginator Works
// @namespace https://greasyfork.org/scripts/5250
// @description Makes any(?) page with a paginator on various Danbooru clones "bottomless"--blend pages seamlessly or separate each with a paginator.
// @include http://behoimi.org/*
// @include http://www.behoimi.org/*
// @include http://danbooru.donmai.us/*
// @include http://hijiribe.donmai.us/*
// @include http://sonohara.donmai.us/*
// @include http://gelbooru.com/*
// @include http://www.gelbooru.com/*
// @include http://konachan.tld/*
// @include https://yande.re/*
// @include https://chan.sankakucomplex.com/*
// @version 2015.02.05
// ==/UserScript==
//If true, each added page retains its paginator. If false, elements are smoothly joined together.
var pageBreak = false;
//Minimum amount of window left to scroll, maintained by loading more pages.
var scrollBuffer = 600;
//Time (in ms) the script will wait for a response from the next page before attempting to fetch the page again. If the script gets trapped in a loop trying to load the next page, increase this value.
var timeToFailure = 15000;
//============================================================================
//=========================Script initialization==============================
//============================================================================
var nextPage, mainTable, mainParent, pending, timeout, iframe;
if( typeof(customF) != "undefined" )
customF();
initialize();
function initialize()
{
//Stop if inside an iframe
if( window != window.top || scrollBuffer == 0 )
return;
//Stop if no "table"
mainTable = getMainTable(document);
if( !mainTable )
return;
//Stop if no paginator
var paginator = getPaginator(document);
if( !paginator )
return;
//Stop if no more pages
nextPage = getNextPage(paginator);
if( !nextPage )
return;
//Hide the blacklist sidebar, since this script breaks the tag totals and post unhiding.
var sidebar = document.getElementById("blacklisted-sidebar");
if( sidebar )
sidebar.style.display = "none";
//Other important variables:
scrollBuffer += window.innerHeight;
mainParent = mainTable.parentNode;
pending = false;
iframe = document.createElement("iframe");
iframe.addEventListener("load", appendNewContent, false);
iframe.width = iframe.height = 0;
iframe.style.visibility = "hidden";
document.body.appendChild(iframe);
//Stop if empty page
if( /<p>(Nothing to display.|Nobody here but us chickens!)<.p>/.test(mainTable.innerHTML) )
return;
//Add copy of paginator to the top
mainParent.insertBefore( paginator.cloneNode(true), mainParent.firstChild );
if( !pageBreak )
paginator.style.display = "none";//Hide bottom paginator
else
{
//Reposition bottom paginator and add horizontal break
mainTable.parentNode.insertBefore( document.createElement("hr"), mainTable.nextSibling );
mainTable.parentNode.insertBefore( paginator, mainTable.nextSibling );
}
//Listen for scroll events
window.addEventListener("scroll", testScrollPosition, false);
testScrollPosition();
}
//============================================================================
//============================Script functions================================
//============================================================================
//Some pages match multiple "tables", so order is important.
function getMainTable(source)
{
//Special case #1: Sankaku post index with Auto Paging enabled
if( /sankaku/.test(location.host) && /auto_page=1/.test(document.cookie) && /^(post(\/|\/index\/?)?|\/)$/.test(location.pathname) )
return null;
var xpath =
[
".//div[@id='posts']/div" // Danbooru 2; don't want to fall through to the wrong xpath if no posts ("<article>") on first page.
,".//div[@id='c-pools']//section" // Danbooru 2
,".//div[@id='a-index']//table[not(contains(@class,'search'))]" // Danbooru 2
,".//div[@id='a-index']" // Danbooru 2
,".//table[contains(@class,'highlight')]" // large number of pages
,".//div[@id='content']/div/div/div/div/span[@class='author']/../../../.." // Sankaku: note search
,".//div[contains(@id,'comment-list')]/div/.." // comment index
,".//*[not(contains(@id,'popular'))]/span[contains(@class,'thumb')]/a/../.." // post/index, pool/show, note/index
,".//li/div/a[contains(@class,'thumb')]/../../.." // post/index, note/index
,".//div[@id='content']//table/tbody/tr[@class='even']/../.." // user/index, wiki/history
,".//div[@id='content']/div/table" // 3dbooru user records
,".//div[@id='forum']" // forum/show
,".//div[@id='content']" // Gelbooru forum thread
,".//div/span[contains(@class,'thumb')]/.." // Gelbooru posts
];
for( var i = 0; i < xpath.length; i++ )
{
getMainTable = (function(query){ return function(source) { return new XPathEvaluator().evaluate(query, source, null, XPathResult.FIRST_ORDERED_NODE_TYPE, null).singleNodeValue; }; })( xpath[i] );
var result = getMainTable(source);
if( result )
{
//alert("UPW main table query: "+xpath[i]+"\n"+location.pathname);
return result;
}
}
return null;
}
function getPaginator( source )
{
var pager = new XPathEvaluator().evaluate("descendant-or-self::div[@id='paginator' or @class='paginator']", source, null, XPathResult.FIRST_ORDERED_NODE_TYPE, null).singleNodeValue;
// Need clear:none to prevent the 2nd page from being pushed to below the sidebar on the Post index... but we don't want this when viewing a specific pool,
// because then the paginator is shoved to the right of the last images on a page. Other sites have issues with clear:none as well, like //yande.re/post.
if( pager && location.host.indexOf("donmai.") >= 0 && document.getElementById("sidebar") )
pager.style.clear = "none";
return pager;
}
function getNextPage( source )
{
var page = getPaginator(source);
if( page )
page = new XPathEvaluator().evaluate(".//a[@alt='next' or contains(text(),'>') or contains(text(),'Next')]", page, null, XPathResult.FIRST_ORDERED_NODE_TYPE, null).singleNodeValue;
return( page ? page.href : null );
}
function testScrollPosition()
{
if( !nextPage )
testScrollPosition = function(){};
//Take the max of the two heights for browser compatibility
else if( !pending && window.pageYOffset + scrollBuffer > Math.max( document.documentElement.scrollHeight, document.documentElement.offsetHeight ) )
{
pending = true;
timeout = setTimeout( function(){pending=false;testScrollPosition();}, timeToFailure );
iframe.contentDocument.location.replace(nextPage);
}
}
function appendNewContent()
{
//Make sure page is correct
clearTimeout(timeout);
if( iframe.contentDocument.location.href != nextPage )
{
setTimeout( function(){ pending = false; }, 1000 );
return;
}
//Copy content from retrived page to current page, but leave off certain headers, labels, etc...
var sourcePaginator = document.adoptNode( getPaginator(iframe.contentDocument) );
var nextElem, deleteMe, source = document.adoptNode( getMainTable(iframe.contentDocument) );
if( /<p>(Nothing to display.|Nobody here but us chickens!)<.p>/.test(source.innerHTML) )
nextPage = null;
else
{
nextPage = getNextPage(sourcePaginator);
if( pageBreak )
mainParent.appendChild(source);
else
{
//Hide elements separating one table from the next (h1 is used for user names on comment index)
var rems = source.querySelectorAll("h2, h3, h4, thead, tfood");
for( var i = 0; i < rems.length; i++ )
rems[i].style.display = "none";
//Move contents of next table into current one
var fragment = document.createDocumentFragment();
while( (nextElem = source.firstChild) )
fragment.appendChild(nextElem);
mainTable.appendChild(fragment);
}
}
//Add the paginator at the bottom if needed.
if( !nextPage || pageBreak )
mainParent.appendChild( sourcePaginator );
if( pageBreak && nextPage )
mainParent.appendChild( document.createElement("hr") );
//Clear the pending request marker and check position again
pending = false;
testScrollPosition();
}
// I am the code of my script.
// HTML is my body, and JavaScript is my blood.
// I have incorporated over a thousand paginators.
// Unaware of loss.
// Nor aware of gain.
// Withstood boredom to include many pages,
// Striving for the script's completion.
// I have no regrets, this is the only path.
// My whole life was "Unlimited Paginator Works."