Reddit Multi Column

reddit-multi-column.user.js

// ==UserScript==
// @name         Reddit Multi Column
// @namespace    https://gist.github.com/c6p/463892bb243f611f2a3cfa4268c6435e
// @version      0.2.6
// @description  Multi column layout for reddit redesign
// @author       Can Altıparmak
// @homepageURL  https://gist.github.com/c6p/463892bb243f611f2a3cfa4268c6435e
// @match        https://www.reddit.com/*
// @match        https://new.reddit.com/*
// @grant        none
// @downloadURL https://update.greasyfork.org/scripts/371490/Reddit%20Multi%20Column.user.js
// @updateURL https://update.greasyfork.org/scripts/371490/Reddit%20Multi%20Column.meta.js
// ==/UserScript==
/* jshint esversion: 6 */

(function() {
    'use strict';
    const MIN_WIDTH = 400;
    const COLUMNS = 4;
    let columns = COLUMNS;
    let cleanup = null;

    let parent = null;
    const cardIcon = () => document?.querySelector('shreddit-sort-dropdown[header-text="View"]')?.shadowRoot?.querySelector('svg');
    const shouldClean =(icon) => icon === undefined ? false : icon.getAttribute('icon-name') !== "view-card-outline";
    cleanup = shouldClean()

    let postMap = new Map()

    const indexOfSmallest = function (a) {
        let lowest = 0;
        for (let i = 1; i<a.length; i++) {
            if (a[i] < (a[lowest]-1)) lowest = i;
        }
        return lowest;
    };

    const makeLayout = function(changes=[]) {
        if (cleanup) return;
        if (!parent) return;

        if (parent.style.position !== "relative") {
            document.querySelector("main").style.maxWidth = "100%";
            const mainContainer = document.querySelector("div.main-container");
            mainContainer.className = [...mainContainer.classList].filter(c => !c.includes(":grid-cols-")).join(" ") // make wide
            document.querySelector("div.subgrid-container").classList.remove("m:w-[1120px]") // make wide
            document.getElementById("right-sidebar-container").style.display = "none" // hide sidebar
            parent.style.position = "relative"
        }

        const cols = Math.floor(parent.offsetWidth / MIN_WIDTH);
        columns = cols;
        const WIDTH = Math.floor((100-columns)/columns);


        const nodes = [...parent.querySelectorAll("article, shreddit-ad-post, faceplate-partial").values()]
        for (const article of nodes) {
            const key = article.ariaLabel
            if (key === null) /* faceplate-partial */ {
            } else if (key in postMap) {
                const post = postMap[key]
                if (post.height !== article.offsetHeight) {
                     post.height = article.offsetHeight
                }
            } else {
                postMap.set(key, {height:article.offsetHeight, col:0, top:0})
            }
        }

        let tops = Array(columns).fill(0);
        for (const post of postMap.values()) {
            post.col = indexOfSmallest(tops)
            post.top = tops[post.col]
            tops[post.col] += post.height
        }
        const height = Math.max(...tops)
        if (height) {
            parent.style.height = height + 500 + "px"
        }

        for (const article of nodes) {
            const key = article.ariaLabel
            const {col, top} = postMap.get(key) ?? {col:0, top:tops[0]}
            article.setAttribute("style", cleanup ? "" : `position:absolute; width:${WIDTH}%; top:${top}px; left:${col*(WIDTH+1)}%`)
        }

        for (const batch of parent.querySelectorAll("faceplate-batch").values()) {
            if (!batch.style.height) {
                batch.style.height = [...batch.childNodes].reduce((height,c) => height + c.clientHeight, 0) + "px"
            }
        }
    };

    const setLayout = function(changes, observer) {
        const c = shouldClean(cardIcon());
        if (c !== cleanup) {
            cleanup = c;
            window.requestAnimationFrame(makeLayout)
        }
    };

    const requestLayout = () => window.requestAnimationFrame(makeLayout)
    const pageChange = new MutationObserver(requestLayout);
    window.addEventListener('resize', requestLayout);
    window.addEventListener('scrollend', requestLayout);
    const layoutSwitch = new MutationObserver(setLayout);

    const watch = function(changes, observer) {
        postMap = new Map()
        parent = document.querySelector("article + hr + faceplate-partial").parentNode
        if (parent === null) return;
        pageChange.observe(parent, {childList: true});
        const timeout = setTimeout(() => {
            const icon = cardIcon();
            if (icon !== undefined) {
                clearTimeout(timeout);
                layoutSwitch.observe(icon, {attributes: true});
            }
        })
        window.requestAnimationFrame(makeLayout);
    };

    const apply = new MutationObserver(watch);
    const app = document.querySelector("shreddit-app")
    apply.observe(app, {attributes: true});
    watch();
})();

@lolDayus @drhouse noted. While threads are coming, it re-layouts. But since some thread images are not yet loaded, their height changes. So does their position.

When I have the time, I'm going to try to wait until a thread's content is loaded, to make the layout more stable. Or just keep their assigned rows and columns, even if it makes some columns longer than others.

v0.2.1released

• Add new.reddit.com
• Fix left sidebar scrolling
• Fix article jumpiness

v0.2.2 released

• Fix subreddits that use faceplate-batch elements to virtualize loaded articles

v0.2.3

• Fix empty page due to reddit hiding too far away articles
  • Fixed: unbalanced columns

Doesn't work anymore

Doesn't work anymore

Yeah, I think there was an update on Reddit's end. It doesn't work across all browsers now.

v0.2.4

• Fix: update main element type

It stopped working

It seems to be working well in Chrome-based browsers now, but not on Firefox-based browsers. Switching from Violentmonkey to Tampermonkey didn't help.

v0.2.5

• Fix: filter-out :grid-col- classes from main-container to make it wide

v0.2.6

• Fix: ads breaking column layout

When in a feed and then pressing the back arrow next to the subreddit name to go back, the scroll position on the home page is lost. Using the Reddit app and website without this script, pressing the back button returns the user to the same scroll position. Is there a way to remember scroll position?