LJ Unfolder (Tapermonkey/Firefox)

// LJ Thread Unfolder
// version 0.2
// 2005-08-23
// Copyright (c) 2005, Tim Babych
// Homepage: http://clear.com.ua/projects/firefox/unfolder
// Released under the GPL license
// http://www.gnu.org/copyleft/gpl.html

// Branched 2006-09-09 by Henrik Nyh <http://henrik.nyh.se>
// Added "Unfold all".

// ==UserScript==
// @name        LJ Thread Unfolder with "Unfold all"
// @namespace   http://clear.com.ua/projects/firefox/unfolder+http://henrik.nyh.se
// @description Expands nested discussion threads in place.
// @include     http://*.insanejournal.com/*
// @version     1
// @grant       none
// @require     https://gist.githubusercontent.com/arantius/3123124/raw/grant-none-shim.js
// ==/UserScript==


var unfoldNodes = [];

function unfold_all() {
unfoldNodes.forEach(unfold_thread);
}

var threadIdRE = /thread=(\d+)/;
var allReplies = $x("//td/a[contains(@href, '?thread')]");

allReplies.forEach(function(thisReplyLink) {
t = document.createTextNode(' - ');
thisReplyLink.parentNode.insertBefore(t, thisReplyLink.nextSibling);

var threadId = thisReplyLink.href.match(threadIdRE)[1];

a = document.createElement('A');
with (a) {
innerHTML = "Unfold";
href = 'javascript:void(0)';
addEventListener("click", unfold_click, false)
setAttribute('thread_id', threadId);
setAttribute('thread_href', thisReplyLink.href);
}
t.parentNode.insertBefore(a, t.nextSibling);
unfoldNodes.push(a);

d = document.createElement('div');
d.style.display = 'none';
d.id = 'thread_unfolder_temp_div_' + threadId;
document.body.appendChild(d);
});

GM_addStyle(
"a.unfold_thread {color:black; text-decoration:none; cursor:default; } " +
"a.unfold_thread:hover {color:black; text-decoration:none; }" +
"a.unfold_thread img { border:none; }"
);

// Inject "Unfold all" links

if (!unfoldNodes.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);
});


//  Workhorses

function unfold_click() {
unfold_thread(this);
}

function unfold_thread(link) {
with (link) {
className = 'unfold_thread';
innerHTML = loader;
blur();
}
elem = link;
// Closure yo!
(function(elem) {

GM_xmlhttpRequest({
   method: 'GET',
   url: link.getAttribute('thread_href'),
   onload: function(responseDetails) {
dummy = document.getElementById('thread_unfolder_temp_div_'+elem.getAttribute('thread_id'));
dummy.innerHTML = responseDetails.responseText;
reply = document.getElementById('ljcmt'+elem.getAttribute('thread_id'));
try {  // If we fail, fail silently
// get cell
td = elem;
while (td.nodeName != 'TD')
td = td.parentNode;

//cleanse cell
while(td.firstChild)
td.removeChild(td.firstChild);
// remove nesting comments
tbody = td.parentNode.parentNode;
my_padding = tbody.firstChild.firstChild.firstChild.width;

next_comment = tbody.parentNode.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.width > my_padding)) {
to_del = next_comment;
next_comment = next_comment.nextSibling.nextSibling.nextSibling;
to_del.parentNode.removeChild(to_del);
}

// add comments there
while(reply && reply.nodeName != 'HR') {
next_one = reply.nextSibling;
td.appendChild(reply);
reply = next_one;
}
} catch(e) {}
dummy.innerHTML = '';
}
});
})(elem);
}

//========================================
//  ROUTINES
//========================================

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


/* Staple functions */

function $(id) { return document.getElementById(id); }
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;
}