fedora-forum-tweaks.user.js

// ==UserScript==
// @name         Fedora Forum Tweaks
// @match        https://fedoraforum.org/*
// @match        https://forums.fedoraforum.org/*
// @grant        GM_addStyle
// @version      2
// ==/UserScript==

{

'use strict';


// ---------------- USER CONFIGURATION ----------------

// Possible values are: true, false

// Example: https://forums.fedoraforum.org/showthread.php?286110-remap-specific-keyboard-keys#post1615714
let FIX_CODEBLOCK_LAYOUT         = true
let REMOVE_TEXT_ABOVE_CODEBLOCKS = true

// Example: https://forums.fedoraforum.org/showthread.php?316568-How-do-I-subscribe-to-a-thread-and-find-it-again#post1800021
// But: https://forums.fedoraforum.org/showthread.php?325913-Grub2-error-message#post1846439
let FIX_LIGHTBOX_LAYOUT = true

// Affects all pages. Expands the content area so that the blue blackground disappears.
let EXPAND_CONTENT = true


// ---------------- CODE SECTION (Experts only) ----------------

// Shortcuts for the script author

const log       = console.log.bind(console)
const create    = document.createElement.bind(document)
const get_all   = document.querySelectorAll.bind(document)
const ELEM      = Node.ELEMENT_NODE
const TEXT      = Node.TEXT_NODE
const COMMENT   = Node.COMMENT_NODE

function copy_attribs(fromelem, toelem) {
    Array.from(fromelem.attributes).forEach(attr => {
        toelem.setAttribute(attr.name, attr.value);
    })
}

function not_just_whitespace(string) {
    return !/\S/.test(string)
}

function is_forum_thread() {
    return /[/]showthread[.]php[?]/.test(location.href)
}


// Cleanup functions

// Inspired by https://www.sitepoint.com/removing-useless-nodes-from-the-dom/
function cleanup_whitespace(node, recursive=false) {
    for(let curpos = 0; curpos < node.childNodes.length; curpos++) {
        let child = node.childNodes[curpos]
        let childtype = child.nodeType
        if ( childtype === COMMENT || (childtype === TEXT && not_just_whitespace(child.nodeValue)) ) {
            curpos --
            node.removeChild(child)
        }
        else if(recursive && childtype === ELEM) {
            clean(child)
        }
    }
}

function fix_paragraphs(old){
    let parent = old.parentNode
    let next = old.nextSibling

    old.remove()
    cleanup_whitespace(old)

    let fixed = create('div')
    copy_attribs(old, fixed)

    let brs = []
    let p = create('p')

    while (old.hasChildNodes()) {
        const child = old.firstChild
        const childtype = child.nodeType

        if (childtype === ELEM && child.tagName === 'BR') {
            brs.push(child)
            old.removeChild(child)
        }

        else if (childtype === ELEM && child.tagName === 'DIV') {
            if (p.hasChildNodes()) {
                fixed.appendChild(p)
            }
            p = create('p')
            fixed.appendChild(child)
            brs = []
        }

        else if ( (brs.length > 1) && (p.hasChildNodes()) ) {
            fixed.appendChild(p)
            p = create('p')
            p.appendChild(child)
            brs = []
        }

        else if (brs.length === 1) {
            p.appendChild(brs[0])
            p.appendChild(child)
            brs = []
        }

        else {
            p.appendChild(child)
            brs = []
        }
    }

    if (p.hasChildNodes()) {
        fixed.appendChild(p)
    }

    parent.insertBefore(fixed, next)
}


// Main program

console.clear()

if ( is_forum_thread() ) {
    get_all('.postcontent.restore').forEach(fix_paragraphs)
    get_all('.postcontent.restore .bbcode_quote .message').forEach(fix_paragraphs)
}

if (EXPAND_CONTENT) {
    GM_addStyle(`
        body {
            margin:0!important;
            padding:0!important;
        }
        .below_body {
            margin-bottom:0!important;
            border-radius:0!important;
        }
        .above_body {
            border-radius:0!important;
        }
    `)
}

if (FIX_CODEBLOCK_LAYOUT) {
    GM_addStyle(`
        div.bbcode_container {
            margin-bottom:1em!important;
        }
        div.bbcode_container>pre.bbcode_code {
            overflow:visible!important;
            height:auto!important;
        }
    `)
}

if (REMOVE_TEXT_ABOVE_CODEBLOCKS) {
    get_all('.bbcode_container > .bbcode_description').forEach(function(codelabel){
        codelabel.remove()
    })
}

if (FIX_LIGHTBOX_LAYOUT) {
    GM_addStyle(`
        a[rel*="Lightbox_"] {
            display:block;
            margin-top:1em;
        }
    `)
}

// Version history:
// v1  Initial commit
// v2  `fix_paragraphs()` now runs faster. Cosmetic cleanup

}