Userscript that auto appends things in reddit.

Readme.md

###Reddddit

Auto appends things scrolling down the page eliminating the need to click the next link.

##Install/Update

To toggle Auto Appending, click on the respective link near your username (above the login form). The asteriks near that toggler opens this page so you can easily check for new versions (specially if reddit changes).

Script will also check daily if there is a new version of it worth of user attention.

Tested on:

• Firefox 3.6.8 / Greasemonkey 0.8.20100408.6
• Firefox 5.0 / Greasemonkey 0.9.5

---

version 0.2:

• Added support for history.

reddddit.user.js

// ==UserScript==
// @name           reddddit
// @version        0.2
// @namespace      http://bender.fesb.hr/~robert/
// @description    Auto append things for reddit page
// @include        http://www.reddit.com/*
// ==/UserScript==

var PAGE_URL = "http://gist.github.com/591568",
	RAW_URL = "http://gist.github.com/raw/591568/"
	SCRIPT_URL = RAW_URL + "reddddit.user.js",
	UPDATE_DATE_URL = RAW_URL + "update_date",

	THING_PARENT = '.sitetable',
	THING = THING_PARENT + ' .thing',
	NEXTPREV = '.nextprev',
	NEXT = NEXTPREV + ' a[rel~="next"]';

//GM_setValue('exclude_promoted', true);
if ( GM_getValue('exclude_promoted') ) {
	THING += ':not(.promoted)';
}

// async auto-update
setTimeout(function(){
	var d = new Date(),
		today = d.getUTCFullYear()+'-'+d.getUTCMonth()+'-'+d.getUTCDate(),
		check_day = GM_getValue('last_version_check_day', '');

	function onload( req ) {
		GM_setValue('last_version_check_day', today);

		var text = req.responseText;
		if ( !/^[\d\s\-]+$/.test(text) ) {
			return;
		}

		var update_day = text.replace(/\s*/g, '');

		if ( check_day < update_day && window.confirm('New version of Reddddit script is available! Do you wont to install it now?') ) {
			window.location.href = SCRIPT_URL;
		}
	}

	if ( !check_day ) {
		// Don't bother on first day.
		GM_setValue('last_version_check_day', today);

	} else if ( check_day < today ) {
		GM_xmlhttpRequest({
			method: 'GET',
			url: UPDATE_DATE_URL,
			onload: onload
		});
	}
}, 100);


function all( a, b ) {
	return all._slice.call( b ? a.querySelectorAll( b ) : document.querySelectorAll( a ), 0 );
}

all._slice = [].slice;

function first( a, b ) {
	return b ? a.querySelector( b ) : document.querySelector( a );
}

function last( a, b ) {
	a = all( a, b );
	return a.length ? a[ a.length - 1 ] : null;
}

function move( a ) {
	var x = null;

	if ( a ) {
		if ( a.nodeType ) {
			a.parentNode && a.parentNode.removeChild( a );
			x = a;

		} else if ( a[0] ) {
			x = ( a[0].ownerDocument || a[0] ).createDocumentFragment();

			for ( var i = 0; a[i]; ++i ) {
				x.appendChild( a[i] );
			}
		}
	}

	move.x = x;
	return move;
}

move.to = function( parent, next ) {
	return this.x && parent.insertBefore( this.x, next || null );
}


move.inPlaceOf = function( node ) {
	return this.x ?
		node && node.parentNode.replaceChild( this.x, node ) :
		node && node.parentNode.removeChild( node ) && null;
}


if ( window === window.top && first(NEXTPREV) ) (function( history ){

var enabled = GM_getValue('enabled', true),
	working,
	delta = 600,
	start_time,
	next_url;


var rbar = first('#header-bottom-right');
if ( rbar ) (function(){

	function toggle( event ) {
		enabled = !enabled;
		GM_setValue( 'enabled', enabled );

		this.textContent = ( enabled ? 'Disable' : 'Enable' ) + ' Auto Append';

		event && event.preventDefault();
	}

	var span = document.createElement('span');
	span.innerHTML = '<a href="#"></a> (<a href="#">*</a>)';

	var a = all( span, 'a' );

	a[0].addEventListener('click', toggle, false);
	enabled = !enabled;
	toggle.call( a[0] );

	a[1].href = PAGE_URL;

	var sep = first( rbar, '.separator' );
	sep && rbar.appendChild( sep.cloneNode(true) );

	rbar.appendChild( span );

})();


function onreadystatechange( req ) {
	if ( req.readyState == 4 ) {
		working = false;

		if ( req.status == 200 ) {
			appendThingsFromHtml( req.responseText );
			delta = Math.round( ( +new Date() - start_time ) * 0.4 ) + 250;
			delta = Math.min( Math.max( 400, delta ), 4000 );

			history && history.replaceState( {}, "", next_url );

		} else {
			last( NEXT + ' i' ).textContent = '(Loading Failed: ' + req.status + ' - ' + req.statusText + ')';
		}
	}
}

function appendThingsFromHtml( html ) {
	var div = document.createElement('div');
	div.innerHTML = html;
	move( all(div, 'script') );

	move( all(div, THING) ).to( last(THING_PARENT) );

	var new_next = first( div, NEXT );
	var old_next = first( NEXT );

	if ( !new_next ) {
		var last_id = last( THING ).className.match(/\bid-(\S+)/i)[1];
		new_next = old_next.cloneNode(true);
		new_next.href = old_next.href.replace( /(\bafter=)[^\&]*/i, last_id );
	}

	move( new_next ).inPlaceOf( old_next );
}

document.addEventListener('scroll', function() {

	if ( working || !enabled ) {
		return;
	}

	if ( document.documentElement.scrollTop + window.innerHeight > document.body.offsetHeight - delta ) {

		var next = first( NEXT );
		if ( !next ) return;

		working = true;
		start_time = +new Date();

		next.innerHTML += ' <i>(Loading...)</i>';

		next_url = next.href.toString()

		GM_xmlhttpRequest({
			method: 'GET',
			url: next_url,
			onreadystatechange: onreadystatechange
		});
	}

}, false);

})( window.history );

update_date

2011-06-07