Greasy Fork is available in English.
Filter, block, and remove unwanted subreddit posts of your choosing and remove ads on the Reddit feed.
// ==UserScript==
// @name Reddit Chemo
// @namespace https://lawrenzo.com/p/reddit-chemo
// @version 2.2.0
// @description Filter, block, and remove unwanted subreddit posts of your choosing and remove ads on the Reddit feed.
// @author Lawrence Sim
// @license WTFPL (http://www.wtfpl.net)
// @grant unsafeWindow
// @grant GM_getValue
// @grant GM.getValue
// @grant GM_setValue
// @grant GM.setValue
// @match *://*.reddit.com/*
// @noframes
// ==/UserScript==
(function() {
//-------------------------------------------------------------------------------------
// Prepare styles
//-------------------------------------------------------------------------------------
let styles = {
".rchemo-post": {
background: "rgb(255 240 240)"
},
".rchemo-dark .rchemo-post": {
background: "rgb(80 70 70)"
},
".rchemo-post.rchemo-card": {
height: "2em"
},
".rchemo-post div[data-click-id='background']": {
background: "none !important",
color: "rgb(163 149 149)",
'font-size': "0.7em",
height: "1.6em",
'line-height': "1.7em"
},
".rchemo-post.rchemo-classic div[data-click-id='background']": {
padding: "0.1em 0 0.15em 0.7em"
},
".rchemo-post.rchemo-compact div[data-click-id='background']": {
padding: "0",
"font-size": "0.6em"
},
".rchemo-post.rchemo-card div[data-click-id='background']": {
'border-left': "none",
padding: "0.2em 0.4em",
"font-size": "0.95em"
},
".rchemo-post button[data-click-id='downvote'] .icon": {
top: "2px",
left: "2px",
'line-height': "14px",
'font-size': "14px"
},
".rchemo-post.rchemo-classic .voteButton, .rchemo-post.rchemo-classic .voteButton span": {
width: "46px"
},
".rchemo-post.rchemo-card button[data-click-id='downvote'] .icon": {
top: "8px",
left: "2px",
'line-height': "20px",
'font-size': "20px"
},
".rchemo-post.rchemo-card .voteButton, .rchemo-post.rchemo-card .voteButton span": {
width: "46px",
height: "36px"
},
".rchemo-unban": {
margin: "0",
'margin-left': "0.6em",
padding: "0.1em 0.4em",
background: "rgb(135 158 200)",
'border-radius': "2px",
color: "#fff",
'line-height': "normal"
},
".rchemo-dark .rchemo-unban": {
background: "rgb(145 125 125)",
color: "#000"
},
".rchemo-post.rchemo-compact .rchemo-unban": {
padding: "0 0.4em",
'line-height': "1.2em"
},
".rchemo-post.rchemo-card .rchemo-unban": {
'font-size': "0.85em"
},
".rchemo-unban:hover": {
background: "rgb(185 200 220)"
},
".rchemo-dark .rchemo-unban:hover": {
background: "rgb(205 180 180)"
},
".rchemo-join, .rchemo-ban": {
'border-radius': "0.9em"
},
".rchemo-classic .rchemo-join, .rchemo-compact .rchemo-join": {
'min-height': "auto",
padding: "0.3em 0.6em",
'line-height': "0.8em",
'font-size': "0.7em"
},
".rchemo-ban": {
margin: "0 0.2em 0 0.4em",
background: "rgb(120 45 45)",
padding: "0.34em 1.2em",
color: "#fff",
'line-height': "1.2em",
'font-size': "1.06em"
},
".rchemo-ban:hover": {
background: "rgb(180 85 85)"
},
".rchemo-classic .rchemo-ban, .rchemo-compact .rchemo-ban": {
padding: "0.2em 0.6em",
'line-height': "0.8em",
'font-size': "0.75em"
},
".rchemo-compact .rchemo-ban": {
'font-size': "0.85em"
},
".rchemo-counter": {
position: "fixed",
top: "60px",
right: "25px",
width: "120px",
"z-index": "70",
background: "rgb(255 240 240)",
border: "1px solid rgb(123, 106, 109)",
"border-radius": "0.2em",
padding: "0.2em 0.4em",
"text-align": "center",
"font-size": "0.75em",
color: "#333"
},
".rchemo-dark .rchemo-counter": {
background: "rgb(80 70 70)",
border: "1px solid rgb(123, 106, 109)",
color: "#ddd"
},
".rchemo-counter-content": {
"margin-top": "0.4em",
display: "none"
},
".rchemo-counter:hover > .rchemo-counter-content": {
display: "block"
},
".rchemo-counter p": {
padding: "0",
margin: "0"
},
".rchemo-counter button": {
"margin-bottom": "0.2em"
},
".rchemo-btn-showhide, .rchemo-btn-editlist": {
"margin-top": "0.2em",
"text-decoration": "underline",
color: "rgb(77, 113, 68)"
},
".rchemo-dark .rchemo-btn-showhide, .rchemo-dark .rchemo-btn-editlist": {
color: "rgb(182, 198, 178)"
},
".rchemo-btn-showhide:hover, .rchemo-btn-editlist:hover": {
color: "rgb(141, 187, 128) !important"
},
".rchemo-btn-darkmode": {
"margin-top": "0.2em",
background: "rgb(135, 158, 200)",
color: "#eee",
padding: "0.2em 0.5em",
"border-radius": "0.6em",
"border": "1px solid #888"
},
".rchemo-btn-darkmode:hover": {
"border-color": "#444"
},
".rchemo-dark .rchemo-btn-darkmode": {
background: "rgb(0 0 0)",
color: "#aaa"
},
".rchemo-dark .rchemo-btn-darkmode:hover": {
"border-color": "#fff"
},
".rchemo-btn-support": {
"text-decoration": "underline",
"font-size": "0.85em",
color: "rgb(90, 108, 140)"
},
".rchemo-btn-support:hover": {
color: "rgb(135, 158, 200)"
},
".rchemo-dark .rchemo-btn-support": {
color: "rgb(135, 158, 200)"
},
".rchemo-dark .rchemo-btn-support:hover": {
color: "rgb(208, 225, 255)"
},
".rchemo-edit-container": {
position: "fixed",
top: "50%",
left: "50%",
transform: "translate(-50%,-50%)",
"z-index": "90",
width: "240px",
background: "rgb(255 240 240)",
'border-radius': "0.2em",
border: "1px solid rgb(123, 106, 109)",
padding: "0.2em 0",
"font-size": "0.9em",
color: "#333",
'user-select': "none",
cursor: "default"
},
".rchemo-dark .rchemo-edit-container": {
background: "rgb(80 70 70)",
border: "1px solid rgb(123, 106, 109)",
color: "#ddd"
},
".rchemo-edit-container p": {
padding: "0 0.2em"
},
".rchemo-edit-container ul": {
height: "240px",
width: "100%",
'overflow-y': "scroll",
'overflow-x': "hidden",
background: "#fff",
'border-top': "1px solid #333",
'border-bottom': "1px solid #333",
"box-sizing": "border-box",
"list-style": "none"
},
".rchemo-dark .rchemo-edit-container ul": {
background: "#222",
'font-size': "0.95em",
padding: "0 0.2em",
'user-select': "none",
'border-color': "#bbb"
},
".rchemo-edit-container li": {
position: "relative",
cursor: "pointer",
padding: "0.2em",
'padding-left': "1.2em",
cursor: "pointer"
},
".rchemo-dark .rchemo-edit-container li:hover": {
background: "rgb(36, 43, 49)"
},
".rchemo-edit-container li:hover": {
background: "rgb(238, 246, 253)"
},
".rchemo-edit-container li.checked": {
background: "rgb(200, 223, 244)"
},
".rchemo-dark .rchemo-edit-container li.checked": {
background: "rgb(79, 91, 102)"
},
".rchemo-edit-container li.checked::before": {
position: "absolute",
left: "0.2em",
content: "'\\2713'",
color: "rgb(43, 151, 20)"
},
".rchemo-dark .rchemo-edit-container li.checked::before": {
color: "rgb(129, 238, 106)"
},
".rchemo-edit-buttons": {
'text-align': "right",
margin: "0.4em 0 0.2em 0",
'padding-right': "0.5em"
},
".rchemo-edit-cancel, .rchemo-edit-submit": {
color: "#eee",
padding: "0.2em 0.5em",
"border-radius": "0.1em",
'font-size': "0.9em"
},
".rchemo-edit-cancel": {
background: "rgb(135, 135, 135)"
},
".rchemo-edit-cancel:hover": {
background: "rgb(90, 90, 90)"
},
".rchemo-edit-submit": {
background: "rgb(135, 158, 200)",
"margin-left": "0.6em",
},
".rchemo-edit-submit:hover": {
background: "rgb(67, 104, 170)"
}
};
let styletxt = "";
for(let selector in styles) {
styletxt += `${selector} {`;
for(let skey in styles[selector]) {
styletxt += `${skey}: ${styles[selector][skey]};`;
}
styletxt += "}";
}
let styleElem = document.createElement('style');
styleElem.className = 'rchemo-styles';
styleElem.innerText = styletxt;
document.body.appendChild(styleElem);
var cssRules = Array.from(document.styleSheets[document.styleSheets.length-1].cssRules);
//-------------------------------------------------------------------------------------
// handlers for banned list
//-------------------------------------------------------------------------------------
GM_getValue = GM_getValue || GM.getValue;
GM_setValue = GM_setValue || GM.setValue;
var banSubreddits = refreshBanned();
function refreshBanned() {
banSubreddits = (
(GM_getValue("banned") && GM_getValue("banned").split("|"))
|| window.bannedSubreddits
|| (unsafeWindow && unsafeWindow.bannedSubreddits)
|| []
);
banSubreddits = banSubreddits.map(n => n.trim().toLowerCase())
.map(n => n.startsWith("r/") ? n : `r/${n}`);
banSubreddits.sort();
return banSubreddits;
}
function addBanned(subreddit) {
banSubreddits.push(subreddit.trim().toLowerCase().startsWith("r/") ? subreddit : `r/${subreddit}`);
banSubreddits.sort();
GM_setValue("banned", banSubreddits.join("|"));
}
function removeBanned(subreddit) {
subreddit = subreddit.startsWith("r/") ? subreddit : `r/${subreddit}`;
let index = banSubreddits.indexOf(subreddit);
if(~index) {
banSubreddits.splice(index, 1);
GM_setValue("banned", banSubreddits.join("|"));
}
}
//-------------------------------------------------------------------------------------
// control element and options
//-------------------------------------------------------------------------------------
var controlElem = document.createElement('div');
controlElem.className = 'rchemo-counter';
controlElem.innerHTML = (
"<p style='font-weight:bold'>Reddit Chemo</p>" +
"<div class='rchemo-counter-content'>" +
"<p>Posts blocked: <span class='rchemo-count'>0</span></p>" +
"<p>Ads blocked: <span class='rchemo-adcount'>0</span></p>" +
"<button class='rchemo-btn-showhide'></button>" +
"<button class='rchemo-btn-editlist'>Edit banned list</button>" +
"<button class='rchemo-btn-darkmode'>light mode</button>" +
"<a href=\"https://ko-fi.com/F1F25YGLA\" rel=\"nofollow\" target=\"blank\"><button class='rchemo-btn-support'>Buy me a coffee</button></a>" +
"</div>"
);
document.body.appendChild(controlElem);
function showControl() { controlElem.style.display = ""; }
function hideControl() { controlElem.style.display = "none"; }
var countElem = controlElem.querySelector(".rchemo-count"),
adCountElem = controlElem.querySelector(".rchemo-adcount"),
adblockCount = 0,
blockCount = 0;
function resetCount() { countElem.innerHTML = blockCount = adblockCount = 0; }
function incrementCount() { countElem.innerHTML = ++blockCount; }
function incrementAdCount() { adCountElem.innerHTML = ++adblockCount; }
var showHideBtn = controlElem.querySelector(".rchemo-btn-showhide"),
postCssRule = cssRules.filter(r => r.selectorText == ".rchemo-post")[0],
showBanned = GM_getValue("showbanned");
if(showBanned === null || typeof showBanned === "undefined") showBanned = true;
function setShowBanned(visible) {
showBanned = !!visible;
GM_setValue("showbanned", showBanned);
showHideBtn.innerHTML = (showBanned ? "Hide" : "Show") + " blocked posts";
postCssRule.style.display = showBanned ? "" : "none";
};
setShowBanned(showBanned);
showHideBtn.addEventListener('click', () => setShowBanned(!showBanned));
var darkBtn = controlElem.querySelector(".rchemo-btn-darkmode"),
darkmode = GM_getValue("darkmode");
function setDarkMode(darkOn) {
darkmode = !!darkOn;
GM_setValue("darkmode", darkOn);
if(darkmode) {
document.body.classList.add("rchemo-dark");
darkBtn.innerHTML = "dark mode";
} else {
document.body.classList.remove("rchemo-dark");
darkBtn.innerHTML = "light mode";
}
}
setDarkMode(darkmode);
darkBtn.addEventListener('click', () => setDarkMode(!darkmode));
//-------------------------------------------------------------------------------------
// editing the list
//-------------------------------------------------------------------------------------
var editBtn = controlElem.querySelector(".rchemo-btn-editlist");
editBtn.addEventListener('click', evt => {
evt.stopPropagation();
openEditor();
});
var editWindow = null;
function closeEditor(unbanList) {
if(editWindow) {
editWindow.remove();
editWindow = null;
}
if(!unbanList || !unbanList.length) return;
unbanList.forEach(subreddit => removeBanned(subreddit));
}
function openEditor() {
if(editWindow) closeEditor();
editWindow = document.createElement('div');
editWindow.className = 'rchemo-edit-container';
editWindow.innerHTML = (
"<p style='font-weight:bold'>Reddit Chemo (Ban List)</p>" +
"<p style='margin:0.4em 0;font-size:0.9em;'>Select/highlight subreddits to remove from the ban list below. (A refresh will be required to show previously hidden posts.)</p>" +
"<ul class='rchemo-edit-list'></ul>" +
"<div class='rchemo-edit-buttons'>" +
"<button class='rchemo-edit-cancel'>Cancel</button>" +
"<button class='rchemo-edit-submit'>Apply</button>" +
"</div>"
);
var listElem = editWindow.querySelector(".rchemo-edit-list"),
unban = [];
banSubreddits.forEach(subreddit => {
let listSubreddit = document.createElement("li");
listSubreddit.innerHTML = subreddit;
listSubreddit.addEventListener('click', () => {
let ubindex = unban.indexOf(subreddit);
if(~ubindex) {
unban.splice(ubindex, 1);
listSubreddit.classList.remove("checked");
} else {
unban.push(subreddit);
listSubreddit.classList.add("checked");
}
});
listElem.append(listSubreddit);
});
editWindow.querySelector(".rchemo-edit-cancel").addEventListener('click', closeEditor);
editWindow.querySelector(".rchemo-edit-submit").addEventListener('click', () => closeEditor(unban));
document.body.appendChild(editWindow);
}
document.body.addEventListener('click', evt => {
if(!editWindow) return;
if(!editWindow.contains(evt.target)) closeEditor();
});
//-------------------------------------------------------------------------------------
// block post function
//-------------------------------------------------------------------------------------
function blockPost(post, sub, mode) {
post.classList.add("rchemo-post");
if(mode == 'compact') post = post.children[0];
let child, voteElem, subelm, icon;
Array.from(post.children).forEach(child => {
if(child.getAttribute("data-click-id") === "background") {
child.innerHTML = `Post from ${sub} removed`;
let rmvBtn = document.createElement("button");
rmvBtn.innerHTML = `Remove ban`;
rmvBtn.classList.add("rchemo-unban");
rmvBtn.addEventListener('click', function() {
this.parentNode.innerHTML = `Post from ${sub} removed from banned list (refresh for reload)`;
this.remove();
removeBanned(sub);
});
child.append(rmvBtn);
return;
}
let downvote = child.querySelectorAll("#vote-arrows-"+post.id + " button[data-click-id='downvote']");
if(downvote && downvote.length) {
child.style.top = "-0.7em";
for(let j = 0; j < downvote.length; ++j) {
let voteElem = downvote[j].parentNode;
voteElem.style.margin = 0;
voteElem.style.padding = 0;
voteElem.parentNode.style.border = "none";
voteElem.innerHTML = "";
voteElem.append(downvote[j]);
}
return;
}
child.remove()
});
incrementCount();
}
//-------------------------------------------------------------------------------------
// watchers as React will sometimes restore/readd posts
//-------------------------------------------------------------------------------------
var emptyObserver = new MutationObserver(mutated => {
mutated.forEach(mutant => {
if(mutant.target.children.length) {
mutant.target.innerHTML = "";
mutant.target.style.border = "none";
mutant.target.style.fill = "none";
}
});
});
var blockObserver = new MutationObserver(mutated => {
mutated.forEach(mutant => {
if(mutant.target.children.length) {
let post = mutant.target.closest("div[data-testid='post-container']");
blockPost(post, post.getAttribute("chemo"));
}
});
});
function refreshObservers() {
emptyObserver.disconnect();
blockObserver.disconnect();
};
//-------------------------------------------------------------------------------------
// resolvers for when post data is not yet loaded
//-------------------------------------------------------------------------------------
function watchPost(post) {
(new MutationObserver((mutated, observer) => {
if(checkAd(post)) return observer.disconnect();
let subreddit = getSubredditNode(post);
if(checkBanned(post, subreddit)) return observer.disconnect();
})).observe(post, {childList:true, subtree:true});
}
function watchSubreddit(post, subreddit) {
(new MutationObserver((mutated, observer) => {
if(checkBanned(post, subreddit)) observer.disconnect();
})).observe(subreddit, {childList:true, attributes:true});
}
//-------------------------------------------------------------------------------------
// process/check post functions
//-------------------------------------------------------------------------------------
function checkAd(post) {
if(
Array.from(post.querySelectorAll("span"))
.find(span => span.innerText && span.innerText.toLowerCase() === "promoted")
) {
post.innerHTML = "";
post.style.border = "none";
post.style.fill = "none";
console.log("Ad removed.");
emptyObserver.observe(post, {childList:true});
incrementAdCount();
return 1;
}
return 0;
}
function checkBanned(post, subreddit) {
let mode = 'classic';
if(post.children.length === 1) {
mode = 'compact';
post.classList.add("rchemo-compact");
} else if(post.querySelectorAll("a[data-click-id='subreddit']").length > 1) {
mode = 'card';
post.classList.add("rchemo-card");
} else {
post.classList.add("rchemo-classic");
}
if(subreddit && subreddit.innerText) {
let subname = subreddit.innerText.toLowerCase();
if(~banSubreddits.indexOf(subname)) {
post.setAttribute("chemo", subreddit.innerText);
blockPost(post, subname, mode);
console.log(`Banned subreddit (${subname}) post removed.`);
blockObserver.observe(
post.querySelector("div[data-click-id='background']"),
{childList:true}
);
return 1;
}
let addBtn = document.createElement("button");
addBtn.innerHTML = `Ban`;
addBtn.classList.add("rchemo-ban");
addBtn.addEventListener('click', function() {
this.remove();
addBanned(subname);
blockPost(post, subname, mode);
});
let subscribeBtn = post.querySelector("#subscribe-button-"+post.id);
if(subscribeBtn) {
subscribeBtn.after(addBtn);
subscribeBtn.classList.add("rchemo-join");
} else if(mode == 'compact') {
subreddit.after(addBtn);
}
return -1;
}
return 0;
}
function getSubredditNode(post) {
let subreddit = post.querySelectorAll("a[data-click-id='subreddit']");
if(!subreddit || !subreddit.length) return null;
for(let i = 0; i < subreddit.length; ++i) {
// card layout has two subreddit click elements, one with icon/image
if(!subreddit[i].children.length) return subreddit[i];
}
}
function processNodes(nodes, refresh) {
if(!nodes || !nodes.length) {
if(refresh) hideControl();
return;
}
let found = 0;
nodes.forEach(node => {
if(!node || !node.querySelectorAll) return;
node.querySelectorAll("div[data-testid='post-container']").forEach(post => {
++found;
if(post.getAttribute("chemo")) return;
post.setAttribute("chemo", 1);
if(checkAd(post)) return;
let subreddit = getSubredditNode(post);
if(!subreddit) return watchPost(post);
if(!checkBanned(post, subreddit)) watchSubreddit(post, subreddit);
});
});
if(refresh) {
found > 1 ? showControl() : hideControl();
}
}
//-------------------------------------------------------------------------------------
// init
//-------------------------------------------------------------------------------------
processNodes([document.querySelector(".ListingLayout-outerContainer")], true);
//-------------------------------------------------------------------------------------
// if Reddit Watcher available, use it for update/change hooks
//-------------------------------------------------------------------------------------
let redditWatcher = window.redditWatcher || (unsafeWindow && unsafeWindow.redditWatcher);
if(redditWatcher) {
redditWatcher.feed.onChange(feed => {
resetCount();
refreshObservers();
processNodes([feed], true);
});
redditWatcher.feed.onUpdate((feed, mutated) => {
mutated && mutated.forEach(mutant => processNodes(mutant.addedNodes));
});
return;
}
//-------------------------------------------------------------------------------------
// otherwise manually create watcher
//-------------------------------------------------------------------------------------
function getFeedWrapper() {
let listingLayout = document.querySelector(".ListingLayout-outerContainer"),
firstPost = listingLayout && listingLayout.querySelector("div[data-testid='post-container']"),
feedWrapper = firstPost && firstPost.parentNode;
while(feedWrapper && !feedWrapper.nextSibling) {
if(feedWrapper == listingLayout) return null;
feedWrapper = feedWrapper.parentNode || null;
}
return feedWrapper && feedWrapper.parentNode;
}
var feedWatcher = new MutationObserver(mutated => mutated.forEach(mutant => processNodes(mutant.addedNodes))),
lastFeedWrapper = null;
(new MutationObserver(() => {
let feedWrapper = getFeedWrapper();
if(feedWrapper !== lastFeedWrapper) {
resetCount();
refreshObservers();
feedWatcher.disconnect();
if(feedWrapper) {
processNodes([feedWrapper], true);
feedWatcher.observe(feedWrapper, {childList:true});
lastFeedWrapper = feedWrapper;
}
}
})).observe(document.body, {childList:true, subtree:true});
})();