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Format a webpage on Stack Enchange websites such as stackoverflow.com so that web clippers can save a pretty webpage containing only the content you need.
// ==UserScript==
// @name Stack Exchange Formatter
// @namespace https://greasyfork.org/en/users/211578
// @version 1.0.2
// @description Format a webpage on Stack Enchange websites such as stackoverflow.com so that web clippers can save a pretty webpage containing only the content you need.
// @author twchen
// @include https://stackoverflow.com/questions/*
// @include https://*.stackexchange.com/questions/*
// @include https://superuser.com/questions/*
// @include https://serverfault.com/questions/*
// @include https://askubuntu.com/questions/*
// @run-at document-idle
// @grant GM_addStyle
// @grant GM_getValue
// @grant GM_setValue
// @grant GM.getValue
// @grant GM.setValue
// ==/UserScript==
"use strict";
if (typeof GM_addStyle == "undefined") {
this.GM_addStyle = (css) => {
const style = document.createElement("style");
style.textContent = css;
document.documentElement.appendChild(style);
return style;
};
}
if (typeof GM == "undefined") {
this.GM = {};
[
["getValue", GM_getValue],
["setValue", GM_setValue],
].forEach(([newFunc, oldFunc]) => {
GM[newFunc] = (...args) => {
return new Promise((resolve, reject) => {
try {
resolve(oldFunc(...args));
} catch (error) {
reject(error);
}
});
};
});
}
function createElement(type, props, ...children) {
const element = document.createElement(type);
Object.entries(props || {}).forEach(([name, value]) => {
if (name.startsWith("on")) {
const eventName = name.slice(2);
element.addEventListener(eventName, value);
} else if (name == "style" && typeof value !== "string") {
Object.assign(element.style, value);
} else {
element.setAttribute(name, value);
}
});
children
.map((child) =>
typeof child === "string" ? document.createTextNode(child) : child
)
.forEach((child) => element.appendChild(child));
return element;
}
const body = document.body;
const formatted = createElement("div", { id: "formatted" });
body.appendChild(formatted);
const posts = document.querySelectorAll(".question, .answer");
let postCheckboxes = [];
let commentCheckboxes = [];
function addCheckboxes() {
posts.forEach((post, i) => {
post.querySelectorAll(".post-layout--right").forEach((layout, j) => {
const isCommentLayout = layout.querySelector(".comments") !== null;
if (isCommentLayout && layout.querySelectorAll("li.comment").length === 0)
return;
layout.style.position = "relative";
const checkboxId = `post${i}-layout${j}`;
const checkbox = createElement("input", {
type: "checkbox",
id: checkboxId,
});
if (isCommentLayout) commentCheckboxes.push(checkbox);
else postCheckboxes.push(checkbox);
const container = createElement(
"div",
{ class: "ft-checkbox-container" },
createElement("label", { for: checkboxId }, "Keep"),
createElement("br"),
checkbox
);
layout.appendChild(container);
});
});
}
function addLinks() {
const question = document.querySelector(".question");
const answers = document.querySelectorAll(".answer");
answers.forEach((answer) => {
const menu = answer.querySelector(".post-menu");
const saveAnsLink = createElement(
"a",
{
href: "#",
style: "margin-right: 0.5rem",
onclick: async (event) => {
event.preventDefault();
unselectAllCheckboxes();
await keepPost(answer);
save();
},
},
"save this answer"
);
const saveQALink = createElement(
"a",
{
href: "#",
onclick: async (event) => {
event.preventDefault();
unselectAllCheckboxes();
await keepPost(question);
await keepPost(answer);
save();
},
},
"save this Q&A"
);
menu.append(saveAnsLink, saveQALink);
});
const advancedSaveLink = createElement(
"div",
{ style: "padding-left: 1rem" },
createElement(
"a",
{
href: "#",
class: "ws-nowrap s-btn s-btn__primary",
onclick: (event) => {
event.preventDefault();
startChoosing();
},
},
"Advanced Save"
)
);
const header = document.querySelector("#question-header");
header.append(advancedSaveLink);
}
function startChoosing() {
document.querySelectorAll(".ft-checkbox-container").forEach((container) => {
container.style.display = "block";
});
let dialog = document.getElementById("ft-dialog");
if (dialog) {
dialog.style.display = "block";
} else {
createDialog();
}
}
async function createDialog() {
const dialog = createElement(
"div",
{ id: "ft-dialog" },
createElement("label", { for: "selectAllPosts" }, "Select All Posts"),
createElement("input", {
type: "checkbox",
id: "selectAllPosts",
onchange: (event) => {
for (let checkbox of postCheckboxes) {
checkbox.checked = event.target.checked;
}
},
}),
createElement("br"),
createElement("label", { for: "selectAllComments" }, "Select All Comments"),
createElement("input", {
type: "checkbox",
id: "selectAllComments",
onchange: (event) => {
for (let checkbox of commentCheckboxes) {
checkbox.checked = event.target.checked;
}
},
}),
createElement("br"),
createElement(
"label",
{ for: "selectCommentsByDefault" },
"Select Comments by Default"
),
createElement("input", {
type: "checkbox",
id: "selectCommentsByDefault",
onchange: (event) => {
GM.setValue("selectCommentsByDefault", event.target.checked);
},
}),
createElement("br"),
createElement(
"button",
{
onclick: (event) => {
document
.querySelectorAll(".ft-checkbox-container")
.forEach((container) => {
container.style.display = "none";
});
dialog.style.display = "none";
},
},
"Cancel"
),
createElement("button", { onclick: (event) => save() }, "Save")
);
const selectComments = await GM.getValue("selectCommentsByDefault");
dialog.querySelector("#selectCommentsByDefault").checked = selectComments;
for (let checkbox of commentCheckboxes) {
checkbox.checked = selectComments;
}
body.appendChild(dialog);
}
function save() {
const children = [];
const questionLink = document.querySelector(
"#question-header .question-hyperlink"
);
const hr = createElement("hr", { style: "height: 0px" });
let title = undefined;
if (questionLink) {
title = createElement(
"div",
{ class: "post-layout--right" },
questionLink.cloneNode(true)
);
children.push(title);
}
posts.forEach((post, i) => {
const layouts = [];
post.querySelectorAll(".post-layout--right").forEach((layout, j) => {
const checkboxId = `post${i}-layout${j}`;
const checkbox = document.getElementById(checkboxId);
if (checkbox && checkbox.checked) {
layouts.push(layout.cloneNode(true));
}
});
if (layouts.length > 0) {
children.push(...layouts);
children.push(hr.cloneNode(true));
}
});
if (children.length === 0 || (children.length === 1 && title)) {
alert("Select at least one post!");
return;
}
children.pop();
hideAllChildren(body);
removeAllChildren(formatted);
formatted.append(...children);
formatted.style.display = "block";
window.history.pushState("formatted", "");
}
function unselectAllCheckboxes() {
for (let checkboxes of [postCheckboxes, commentCheckboxes]) {
for (let checkbox of checkboxes) {
checkbox.checked = false;
}
}
}
async function keepPost(post) {
const layouts = post.querySelectorAll(".post-layout--right");
const selectComments = await GM.getValue("selectCommentsByDefault");
for (let layout of layouts) {
console.log(layout);
const checkbox = layout.querySelector(
'.ft-checkbox-container input[type="checkbox"]'
);
if (checkbox === null) {
console.log(1);
continue;
}
if (layout.querySelector(".comments") && selectComments === false) {
console.log(2);
checkbox.checked = false;
} else {
checkbox.checked = true;
}
}
}
function removeAllChildren(el) {
while (el.firstChild) {
el.removeChild(el.firstChild);
}
}
function showAllChildren(el) {
[...el.children].forEach((child) => {
child.style.display =
child.old_display === undefined ? "" : child.old_display;
});
}
function hideAllChildren(el) {
[...el.children].forEach((child) => {
child.old_display = child.style.display;
child.style.display = "none";
});
}
GM_addStyle(`
.ft-checkbox-container {
position: absolute;
top: 0;
right: -1rem;
text-align: center;
display: none;
}
#ft-dialog {
background-color: white;
position: fixed;
top: 50%;
right: 2rem;
transform: translateY(-50%);
z-index: 100;
text-align: center;
padding: 0.8rem;
border: 1px solid black;
border-radius: 5px;
}
#ft-dialog label {
width: 10rem;
display: inline-block;
text-align: left;
}
#ft-dialog button {
width: 5rem;
margin: 0 0.5rem;
}
#formatted {
background-color: #f6f6f6;
position: absolute;
top: 0;
left: 0;
width: 100%;
}
#formatted .question-hyperlink {
color: black;
font-size: 2rem;
}
#formatted .ft-checkbox-container {
display: none !important;
}
#formatted .post-layout--right {
background-color: white;
padding: 2rem;
margin: 0 2rem;
box-shadow: 0 1px 3px #808080b5;
}
#formatted .post-menu, #formatted .post-signature, #formatted *[id^="comments-link-"] {
display: none;
}
`);
// handle backward/forward events
window.addEventListener("popstate", function (event) {
if (event.state === "formatted") {
hideAllChildren(body);
formatted.style.display = "block";
} else {
showAllChildren(body);
formatted.style.display = "none";
}
});
addCheckboxes();
addLinks();