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A userscript that adds a code wrap toggle button
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// ==UserScript==
// @name GitHub Toggle Code Wrap
// @version 1.1.2
// @description A userscript that adds a code wrap toggle button
// @license https://creativecommons.org/licenses/by-sa/4.0/
// @author StylishThemes
// @namespace https://github.com/StylishThemes
// @include https://github.com/*
// @run-at document-idle
// @grant GM_registerMenuCommand
// @grant GM_getValue
// @grant GM_setValue
// @grant GM_addStyle
// @require https://greasyfork.org/scripts/28721-mutations/code/mutations.js?version=189706
// @icon https://avatars3.githubusercontent.com/u/6145677?v=3&s=200
// ==/UserScript==
/* jshint esnext:true, unused:true */
(() => {
"use strict";
/*
This code is also part of the GitHub-Dark Script
(https://github.com/StylishThemes/GitHub-Dark-Script)
Extracted out into a separate userscript in case users only want
to add this functionality
*/
// set by GM popup menu
let globalWrap = GM_getValue("github-global-code-wrap", true),
busy = false;
const wrapIcon = `
<svg xmlns="http://www.w3.org/2000/svg" width="768" height="768" viewBox="0 0 768 768">
<path d="M544.5 352.5q52.5 0 90 37.5t37.5 90-37.5 90-90 37.5H480V672l-96-96 96-96v64.5h72q25.5 0 45-19.5t19.5-45-19.5-45-45-19.5H127.5v-63h417zm96-192v63h-513v-63h513zm-513 447v-63h192v63h-192z"/>
</svg>`,
// inline code wrap css
wrapCss = {
"wrapped": "white-space: pre-wrap !important; word-break: break-all !important; overflow-wrap: break-word !important; display: block !important;",
"unwrap": "white-space: pre !important; word-break: normal !important; display: block !important;"
};
function findWrap(event) {
const target = event.target;
if (target.classList.contains("ghd-wrap-toggle")) {
toggleClasses(target);
}
}
// equivalent to .next("code, pre, .highlight, .diff-table");
function findNext(el) {
const nextSib = el.nextElementSibling;
if (
/code|pre/i.test(nextSib.nodeName) ||
nextSib && (
nextSib.classList.contains("highlight") ||
nextSib.classList.contains("diff-table")
)
) {
return nextSib;
}
return el;
}
function toggleClasses(icon) {
let css,
code = findNext(icon);
if ($("code", code)) {
code = $("code", code);
}
if (!code) {
console.error("Code wrap icon associated code not found", icon);
return;
}
// code with line numbers
if (code.nodeName === "TABLE") {
if (code.className.indexOf("wrap-table") < 0) {
css = !globalWrap;
} else {
css = code.classList.contains("ghd-unwrap-table");
}
if (css) {
code.classList.add("ghd-wrap-table");
code.classList.remove("ghd-unwrap-table");
icon.classList.add("wrapped");
icon.classList.remove("unwrap");
} else {
code.classList.remove("ghd-wrap-table");
code.classList.add("ghd-unwrap-table");
icon.classList.remove("wrapped");
icon.classList.add("unwrap");
}
} else {
css = code.getAttribute("style") || "";
if (css === "") {
css = wrapCss[globalWrap ? "unwrap" : "wrapped"];
} else {
css = wrapCss[css === wrapCss.wrapped ? "unwrap" : "wrapped"];
}
code.setAttribute("style", css);
if (css === wrapCss.wrapped) {
icon.classList.add("wrapped");
icon.classList.remove("unwrap");
} else {
icon.classList.add("unwrap");
icon.classList.remove("wrapped");
}
}
}
function getPrevSib(el, name) {
let prev = el.previousSibling;
while (prev) {
if (prev.nodeType !== 1 || !prev.classList.contains(name)) {
prev = prev.previousSibling;
} else {
return prev;
}
}
return null;
}
// Add code wrap toggle
function buildCodeWrap() {
if (busy) {
return;
}
busy = true;
// add wrap code icons
let tmp,
wrapper = $$(".blob-wrapper"),
indx = wrapper ? wrapper.length : 0,
// <div class="ghd-wrap-toggle tooltipped tooltipped-w"
// aria-label="Toggle code wrap">
icon = document.createElement("div");
icon.className = "ghd-wrap-toggle tooltipped tooltipped-w";
icon.setAttribute("aria-label", "Toggle code wrap");
icon.innerHTML = wrapIcon;
// $(".blob-wrapper").prepend(wrapIcon);
while (indx--) {
if (!$(".ghd-wrap-toggle", wrapper[indx])) {
wrapper[indx].insertBefore(
icon.cloneNode(true), wrapper[indx].childNodes[0]
);
}
}
// $(".markdown-body pre").before(wrapIcon);
wrapper = $$(".markdown-body pre");
indx = wrapper ? wrapper.length : 0;
while (indx--) {
tmp = getPrevSib(wrapper[indx], "ghd-wrap-toggle");
if (!tmp) {
wrapper[indx].parentNode.insertBefore(
icon.cloneNode(true), wrapper[indx]
);
}
}
busy = false;
}
function init() {
document.addEventListener("click", findWrap);
if (!globalWrap) {
$("body").classList.add("nowrap");
}
buildCodeWrap();
}
function $(str, el) {
return (el || document).querySelector(str);
}
function $$(str, el) {
return Array.from((el || document).querySelectorAll(str));
}
// don't initialize if GitHub Dark Script is active
if (!$("#ghd-menu")) {
GM_addStyle(`
/* icons next to a pre */
.ghd-wrap-toggle {
position: absolute;
right: 1.4em;
margin-top: .2em;
-moz-user-select: none;
-webkit-user-select: none;
cursor: pointer;
z-index: 20;
}
/* file & diff code tables */
.ghd-wrap-table td.blob-code-inner {
white-space: pre-wrap !important;
word-break: break-all !important;
}
.ghd-unwrap-table td.blob-code-inner {
white-space: pre !important;
word-break: normal !important;
}
/* icons inside a wrapper immediatly around a pre */
.highlight > .ghd-wrap-toggle {
right: .5em;
top: .5em;
margin-top: 0;
}
/* icons for non-syntax highlighted code blocks;
* see https://github.com/gjtorikian/html-proofer/blob/master/README.md
*/
.markdown-body:not(.comment-body) .ghd-wrap-toggle:not(:first-child) {
right: 3.4em;
}
.ghd-wrap-toggle svg {
height: 1.25em;
width: 1.25em;
fill: rgba(110, 110, 110, .4);
pointer-events: none;
}
.ghd-wrap-toggle.unwrap:hover svg, .ghd-wrap-toggle:hover svg {
fill: #8b0000; /* wrap disabled (red) */
}
body:not(.nowrap) .ghd-wrap-toggle:not(.unwrap):hover svg,
.ghd-wrap-toggle.wrapped:hover svg {
fill: #006400; /* wrap enabled (green) */
}
.blob-wrapper, .markdown-body pre, .markdown-body .highlight {
position:relative;
}
/* global code wrap */
.blob-code-inner,
.markdown-body pre > code,
.markdown-body .highlight > pre {
white-space: pre-wrap !important;
word-break: break-all !important;
overflow-wrap: break-word !important;
display: block !important;
}
td.blob-code-inner {
display: table-cell !important;
}
`);
document.addEventListener("ghmo:container", buildCodeWrap);
document.addEventListener("ghmo:preview", buildCodeWrap);
// Add GM options
GM_registerMenuCommand("Set Global Code Wrap Option", () => {
const body = $("body"),
val = prompt("Global Code Wrap (true/false):", "" + globalWrap);
globalWrap = /^t/.test(val);
GM_setValue("github-global-code-wrap", globalWrap);
body.classList.toggle("nowrap", !globalWrap);
});
init();
}
})();