Google+ Column Adjustments

Google+ Columns Adjustment
As of 2015-11-19. See the latest version.
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/*

Following code belongs to Avatars Plus! and More for Google+.
Copyright (C) 2016 Jackson Tan
This program is free software: you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation, either version 3 of the License, or
(at your option) any later version.

This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.

You should have received a copy of the GNU General Public License
along with this program. If not, see <http://www.gnu.org/licenses/>.

*/

// ==UserScript==
// @id             GPlusColumnAdj
// @name           Google+ Column Adjustments
// @version        0.1.1
// @namespace      gplus.columnadj
// @author         Jackson Tan
// @description    Google+ Columns Adjustment
// @include        https://plus.google.com/*
// @exclude        /https://plus\.google\.com(/u/\d+)?/?stream/circles/.+/i
// @exclude	       /https://plus\.google\.com(/u/\d+)?/?b/.+/i
// @run-at         document-end
// @grant          GM_xmlhttpRequest
// ==/UserScript==

GM_addStyle = function (css) {
    var head = document.getElementsByTagName('head')[0], style = document.createElement('style');
    if (!head) { return }
    style.type = 'text/css';
    try { style.innerHTML = css } catch (x) { style.innerText = css }
    head.appendChild(style);
}

function minIndexThreeNum(a, b, c) {
    var result = Math.min(Math.min(a, b), c);
    if (result == a)
        return 0;
    else if (result == b)
        return 1;
    return 2;
}

function appendHtmlToNode(html, node) {
    node.innerHTML += html;
}

function buildElem(tagName, className, attr1, val1, attr2, val2) {
    var elem = document.createElement(tagName);
    elem.className = className;
    elem.setAttribute(attr1, val1);
    elem.setAttribute(attr2, val2);
    return elem;
}

function buildArr(length, colA, colB, modulo) {
    var newColumn = new Array();
    var a = 0, b = 0, flag = false, count = 0;
    for (var i = 0; i < length; i++) {
        flag = !flag;
        if (i != 0 && (i + 1) % modulo == 0) {
            if (flag)
                newColumn[newColumn.length] = colA[a + 1];
            else
                newColumn[newColumn.length] = colB[b];
        }
        if (flag) {
            a++;
        }
        else {
            b++;
        }
    }
    return newColumn;
}

function buildColumn(colArr, className, jsName, insertTarget) {
    var colDiv = buildElem("div", className, "jsName", jsName, "role", "list");
    for (var i = 0; i < colArr.length; i++) {
        appendHtmlToNode(colArr[i].outerHTML, colDiv);
        colArr[i].outerHTML = "";
    }
    insertTarget.appendChild(colDiv);
}

var listenerPostInsertion = function (e) {
    document.getElementsByClassName(streamColClass)[0].removeEventListener('DOMNodeInserted', listenerPostInsertion, false);
    document.getElementsByClassName(streamColClass)[1].removeEventListener('DOMNodeInserted', listenerPostInsertion, false);
    if (e.target.nodeType != 3 && e.target.tagName == postTagName) {
        console.log(minIndexThreeNum(col0.length - 1, col1.length, colParent.childNodes[2].childNodes.length));
        var postHTML = e.target.outerHTML;
        e.target.outerHTML = "none";
        console.log(postHTML);
        console.log(e.target.outerHTML);
        insertTargetNode.childNodes[minIndexThreeNum(col0.length - 1, col1.length, colParent.childNodes[2].childNodes.length)].innerHTML += postHTML;
    }
    document.getElementsByClassName(streamColClass)[0].addEventListener('DOMNodeInserted', listenerPostInsertion, false);
    document.getElementsByClassName(streamColClass)[1].addEventListener('DOMNodeInserted', listenerPostInsertion, false);
};

function onLoad() {
    var streamColClass = "H68wj jxKp7";
    var streamColJsName = "dJDgTb";

    var colParent = document.getElementsByClassName(streamColClass)[0].parentNode;
    var col0 = document.getElementsByClassName(streamColClass)[0].childNodes;
    var col1 = document.getElementsByClassName(streamColClass)[1].childNodes;

    var len_col0 = col0.length - 1;
    var len_col1 = col1.length;
    var total_col = 3;
    var newColArr = buildArr(len_col0 + len_col1, col0, col1, total_col);
    buildColumn(newColArr, streamColClass, streamColJsName, colParent);

    var postTagName = "C-FPDNBB";
    var insertTargetNode = colParent;

    document.getElementsByClassName(streamColClass)[0].addEventListener('DOMNodeInserted', listenerPostInsertion, false);
    document.getElementsByClassName(streamColClass)[1].addEventListener('DOMNodeInserted', listenerPostInsertion, false);
}

document.addEventListener("DOMContentLoaded", onLoad, false);