Userscript - LJ/IJ/Scribbld Unfold All

// LJ Thread Unfolder
// version 0.5
// 2008-03-03
// Copyright (c) 2005-2008, Tim Babych
// Homepage: http://clear.com.ua/projects/firefox/unfolder
// Released under the GPL license
// http://www.gnu.org/copyleft/gpl.html
//
// --------------------------------------------------------------------
//
// This is a Greasemonkey user script.
//
// To install, you need Greasemonkey: http://greasemonkey.mozdev.org/
// Then restart Firefox and revisit this script.
// Under Tools, there will be a new menu item to "Install User Script".
// Accept the default configuration and install.
//
// To uninstall, go to Tools/Manage User Scripts,
// select "LJ Thread Unfolder", and click Uninstall.
//
// --------------------------------------------------------------------
//
// ==UserScript==
// @name            LJ Thread Unfolder
// @description Expands nested discussion threads in place
// @include         http://*.livejournal.com/*
// ==/UserScript==

//================================
//  INIT
//================================

GM_compat()
add_unfolders(document)
add_unfoldalllink()

GM_addStyle(
"a.unfold_thread {color: black; text-decoration:none} "+
"a.unfold_thread:hover {color: black; text-decoration:none} "+
"a.unfold_thread img { border:none; position: relative; top: 3px;}"
)


//================================
//  WORKHORSES
//================================

function add_unfolders(elem) {
    get_itemid_regexp = /thread=(\d+)/;
    var allReplies;
    allReplies = document.evaluate(
        "//a[contains(@href, '?thread')]",
        elem,
        null,
        XPathResult.UNORDERED_NODE_SNAPSHOT_TYPE,
        null);

    for (var i = 0; i < allReplies.snapshotLength; i++) {
        var thisOne = allReplies.snapshotItem(i);

        if (thisOne.innerHTML == 'Parent')
            continue;

        if (thisOne.nextSibling && thisOne.nextSibling.nextSibling && thisOne.nextSibling.nextSibling.innerHTML == 'Unfold')
            continue;

        // the first child in td
        if (thisOne.parentNode.firstChild == thisOne || // just Unfold
            ( thisOne.previousSibling && thisOne.previousSibling.previousSibling
            && thisOne.previousSibling.previousSibling.href ) ) { // Unfold all

            var t = document.createTextNode(' - ');
            thisOne.parentNode.insertBefore(t, thisOne.nextSibling);

            var params =  get_itemid_regexp.exec(thisOne.href);

            var a = document.createElement('a');
            var linktxt = document.createTextNode('Unfold');
            a.href = 'javascript:void(0)';
            if (thisOne.previousSibling) // 'All' mode
                a.setAttribute('all', true);
            a.setAttribute('thread_id', params[1]);
            a.setAttribute('thread_href', thisOne.href);
            a.addEventListener("click", unfold_me, false)
            a.appendChild(linktxt);
            t.parentNode.insertBefore(a, t.nextSibling);
        }
    }
}

function unfold_me() {
 unfold_thread(this);
}

function unfold_thread(e) {
    e.className = 'unfold_thread';
    e.style.cursor = 'default';
    e.innerHTML = loader;
    e.blur();

    GM_xmlhttpRequest({
        method: 'GET',
        url: e.getAttribute('thread_href'),
        onload: function(responseDetails) { parse_result(responseDetails.responseText, e); }
        });

    function parse_result(result, e){
        var dummy = document.createElement('DIV');
        dummy.style.display = 'none';
        document.body.appendChild(dummy);
        var old = document.getElementById('ljcmt'+e.getAttribute('thread_id'));
        if (old)
            old.id += '_old';
        dummy.innerHTML = result;
        var reply = document.getElementById('ljcmt'+e.getAttribute('thread_id'));

        add_unfolders(dummy);
        var td = e;

        while (td.nodeName != 'TD') {
            td = td.parentNode;
        }
        var tbody = td.parentNode.parentNode;
        var span = tbody.parentNode.parentNode;

        var my_padding = tbody.firstChild.firstChild.firstChild.width;

        while(reply && reply.nodeName != 'HR'){
            var next_one = reply.nextSibling;
            if (span.parentNode) {
              span.parentNode.insertBefore(reply, span);
              if (reply.nodeName == 'SPAN')
                reply.firstChild.firstChild.firstChild.firstChild.firstChild.width += my_padding;
            }
          reply = next_one;
        }

        var next_comment = '';
        if (span.nextSibling && span.nextSibling.nextSibling && span.nextSibling.nextSibling.nextSibling)
            next_comment = span.nextSibling.nextSibling.nextSibling;
        while(next_comment && next_comment.firstChild && next_comment.firstChild.firstChild && next_comment.firstChild.firstChild.firstChild && next_comment.firstChild.firstChild.firstChild.firstChild && next_comment.firstChild.firstChild.firstChild.firstChild.firstChild && (next_comment.firstChild.firstChild.firstChild.firstChild.firstChild.width > my_padding)) {
            var to_del = next_comment;
            if (next_comment.nextSibling && next_comment.nextSibling.nextSibling && next_comment.nextSibling.nextSibling.nextSibling)
                next_comment = next_comment.nextSibling.nextSibling.nextSibling;
            else
                next_comment = '';
            if (to_del && to_del.parentNode)
                to_del.parentNode.removeChild(to_del);
        }

        document.body.removeChild(dummy);
        if (span && span.parentNode)
            span.parentNode.removeChild(span);
    }
}


//========================================
//  ROUTINES
//========================================
function GM_compat() {
    if ( typeof GM_xmlhttpRequest == 'undefined' )
        GM_xmlhttpRequest = (function(params) {
            var req = new XMLHttpRequest();
            req.onreadystatechange =  function() {
                    if (req.readyState != 4) return; // while not Complete
                    params.onload(req);
                }
            req.open(params.method, params.url, true);
            req.send("");
        });

    if ( typeof GM_addStyle == 'undefined' )
        GM_addStyle = (function(css) {
            style = document.createElement('STYLE');
            style.type = 'text/css';
            style.innerHTML = css;
            document.body.appendChild(style);
        });
}

function add_unfoldalllink(){
if (!$x("//a[contains(@thread_href, '?thread')]").length)
    return;

$x("//a[contains(@href, '?mode=reply')]/ancestor::b").forEach(function(b) {

    var comma = document.createTextNode(', ');
    b.appendChild(comma);

    var newA = document.createElement("A");
    with (newA) {
        innerHTML = "Unfold all";
        href = "javascript:void(0)";
        addEventListener("click", unfold_all, false);
    }

    b.appendChild(newA);
    b.insertBefore(newA, newA.previousSibling.previousSibling);
    b.insertBefore(comma, comma.previousSibling.previousSibling);

});
}

var loader = '<img src="data:image/gif;base64,R0lGODlhEAAQAMQAAP///+7u7t3d3bu7u6qqqpmZmYi'+
'IiHd3d2ZmZlVVVURERDMzMyIiIhEREQAR'+
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'fySDhGYQdDWGQyUhADs="> Loading&hellip;';

function $x(path, root) {
    if (!root) root = document;
    var i, arr = [], xpr = document.evaluate(path, root, null, XPathResult.UNORDERED_NODE_SNAPSHOT_TYPE, null);
    for (i = 0; item = xpr.snapshotItem(i); i++) arr.push(item);
    return arr;
}

function unfold_all() {
    $x("//a[contains(@thread_href, '?thread')]").forEach(function(value){
        console.log("ID:" + value.getAttribute('thread_id'));
        unfold_thread(value);
            });
  }