From 51ebbee40fd9e5d1695c3ce8fae2ef183d005497 Mon Sep 17 00:00:00 2001 From: Andrew Zambazos <62979495+Bobbybear007@users.noreply.github.com> Date: Sun, 12 Jul 2026 20:54:26 +1200 Subject: [PATCH] Add hello-nebula and YouTube-dislike extensions Add two Nebula extension packages: - hello-nebula: a minimal demo extension that shows a small badge on pages (manifest, content.js, content.css, README). - return-youtube-dislike: a content-script port that shows estimated YouTube dislike counts using the public Return YouTube Dislike API (manifest, content.js, content.css, README). Includes GPL-3.0 LICENSE and required attribution. READMEs contain install instructions and notes. --- hello-nebula/README.txt | 10 + hello-nebula/content.css | 20 + hello-nebula/content.js | 15 + hello-nebula/manifest.json | 15 + return-youtube-dislike/LICENSE.txt | 674 +++++++++++++++++++++++++++ return-youtube-dislike/README.txt | 32 ++ return-youtube-dislike/content.css | 60 +++ return-youtube-dislike/content.js | 457 ++++++++++++++++++ return-youtube-dislike/manifest.json | 21 + 9 files changed, 1304 insertions(+) create mode 100644 hello-nebula/README.txt create mode 100644 hello-nebula/content.css create mode 100644 hello-nebula/content.js create mode 100644 hello-nebula/manifest.json create mode 100644 return-youtube-dislike/LICENSE.txt create mode 100644 return-youtube-dislike/README.txt create mode 100644 return-youtube-dislike/content.css create mode 100644 return-youtube-dislike/content.js create mode 100644 return-youtube-dislike/manifest.json diff --git a/hello-nebula/README.txt b/hello-nebula/README.txt new file mode 100644 index 0000000..ff68662 --- /dev/null +++ b/hello-nebula/README.txt @@ -0,0 +1,10 @@ +Copy this folder into Nebula's extensions directory to install: + + %LOCALAPPDATA%\Nebula\User Data\extensions\hello-nebula\ + +Then open Settings > Plugins and click Reload Plugins (or restart Nebula). + +manifest.json fields: + id, name, version, description, enabled + content_scripts[].matches (e.g. "*://*/*", "*://*.youtube.com/*", "") + content_scripts[].js / css (paths relative to this folder) diff --git a/hello-nebula/content.css b/hello-nebula/content.css new file mode 100644 index 0000000..a4c9b21 --- /dev/null +++ b/hello-nebula/content.css @@ -0,0 +1,20 @@ +#nebula-hello-badge { + position: fixed; + right: 16px; + bottom: 16px; + z-index: 2147483646; + padding: 10px 14px; + border-radius: 10px; + background: #101820; + color: #e8f7ff; + font: 600 13px/1.3 Segoe UI, sans-serif; + box-shadow: 0 8px 24px rgba(0, 0, 0, 0.28); + opacity: 1; + transition: opacity 0.4s ease, transform 0.4s ease; + pointer-events: none; +} + +#nebula-hello-badge.nebula-hello-badge--hide { + opacity: 0; + transform: translateY(8px); +} diff --git a/hello-nebula/content.js b/hello-nebula/content.js new file mode 100644 index 0000000..698ec02 --- /dev/null +++ b/hello-nebula/content.js @@ -0,0 +1,15 @@ +(function () { + if (document.getElementById('nebula-hello-badge')) { + return; + } + + const badge = document.createElement('div'); + badge.id = 'nebula-hello-badge'; + badge.textContent = 'Nebula extension loaded'; + badge.title = 'hello-nebula sample extension'; + document.documentElement.appendChild(badge); + + window.setTimeout(() => { + badge.classList.add('nebula-hello-badge--hide'); + }, 3500); +})(); diff --git a/hello-nebula/manifest.json b/hello-nebula/manifest.json new file mode 100644 index 0000000..cc39b70 --- /dev/null +++ b/hello-nebula/manifest.json @@ -0,0 +1,15 @@ +{ + "id": "hello-nebula", + "name": "Hello Nebula", + "version": "1.0.0", + "description": "Sample Nebula extension. Shows a small badge on every page.", + "enabled": true, + "content_scripts": [ + { + "matches": ["*://*/*"], + "js": ["content.js"], + "css": ["content.css"], + "run_at": "document_end" + } + ] +} diff --git a/return-youtube-dislike/LICENSE.txt b/return-youtube-dislike/LICENSE.txt new file mode 100644 index 0000000..f288702 --- /dev/null +++ b/return-youtube-dislike/LICENSE.txt @@ -0,0 +1,674 @@ + GNU GENERAL PUBLIC LICENSE + Version 3, 29 June 2007 + + Copyright (C) 2007 Free Software Foundation, Inc. + Everyone is permitted to copy and distribute verbatim copies + of this license document, but changing it is not allowed. + + Preamble + + The GNU General Public License is a free, copyleft license for +software and other kinds of works. + + The licenses for most software and other practical works are designed +to take away your freedom to share and change the works. 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It is safest +to attach them to the start of each source file to most effectively +state the exclusion of warranty; and each file should have at least +the "copyright" line and a pointer to where the full notice is found. + + + Copyright (C) + + This program is free software: you can redistribute it and/or modify + it under the terms of the GNU General Public License as published by + the Free Software Foundation, either version 3 of the License, or + (at your option) any later version. + + This program is distributed in the hope that it will be useful, + but WITHOUT ANY WARRANTY; without even the implied warranty of + MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + GNU General Public License for more details. + + You should have received a copy of the GNU General Public License + along with this program. If not, see . + +Also add information on how to contact you by electronic and paper mail. + + If the program does terminal interaction, make it output a short +notice like this when it starts in an interactive mode: + + Copyright (C) + This program comes with ABSOLUTELY NO WARRANTY; for details type `show w'. + This is free software, and you are welcome to redistribute it + under certain conditions; type `show c' for details. + +The hypothetical commands `show w' and `show c' should show the appropriate +parts of the General Public License. Of course, your program's commands +might be different; for a GUI interface, you would use an "about box". + + You should also get your employer (if you work as a programmer) or school, +if any, to sign a "copyright disclaimer" for the program, if necessary. +For more information on this, and how to apply and follow the GNU GPL, see +. + + The GNU General Public License does not permit incorporating your program +into proprietary programs. If your program is a subroutine library, you +may consider it more useful to permit linking proprietary applications with +the library. If this is what you want to do, use the GNU Lesser General +Public License instead of this License. But first, please read +. diff --git a/return-youtube-dislike/README.txt b/return-youtube-dislike/README.txt new file mode 100644 index 0000000..348dd83 --- /dev/null +++ b/return-youtube-dislike/README.txt @@ -0,0 +1,32 @@ +Return YouTube Dislike (Nebula) +=============================== + +Shows estimated YouTube dislike counts using the public +Return YouTube Dislike API. + +Based on / inspired by: + https://github.com/Anarios/return-youtube-dislike + https://returnyoutubedislike.com + +API attribution (required by RYD): + https://returnyoutubedislike.com + +License: + This Nebula package is a simplified derivative intended for use with + Nebula's native extension runtime. Upstream project is GPL-3.0. + See LICENSE.txt. + +Install +------- +Copy this folder to: + + %LOCALAPPDATA%\Nebula\User Data\extensions\return-youtube-dislike\ + +Open Settings > Plugins > Reload Plugins, then open a YouTube video. + +Notes +----- +- Content-script only (no Chrome extension APIs) +- No dislike vote submission to RYD +- No premium analytics UI +- Respect RYD rate limits (100/min, 10k/day) diff --git a/return-youtube-dislike/content.css b/return-youtube-dislike/content.css new file mode 100644 index 0000000..fce5113 --- /dev/null +++ b/return-youtube-dislike/content.css @@ -0,0 +1,60 @@ +/* Return YouTube Dislike — Nebula port + * Ratio bar styles adapted from Anarios/return-youtube-dislike (GPL-3.0) + * https://github.com/Anarios/return-youtube-dislike + */ + +#ryd-bar-container { + background: #cc0000 !important; + border-radius: 2px; + width: 100% !important; + height: 3px !important; + overflow: hidden; + display: block; +} + +#ryd-bar { + background: #2ba640 !important; + border-radius: 2px 0 0 2px; + transition: width 0.15s ease-in-out; + height: 100% !important; + display: block; +} + +.ryd-tooltip { + display: block !important; + height: 3px !important; + position: absolute; + z-index: 1; + pointer-events: none; +} + +ytd-menu-renderer.ytd-watch-metadata { + overflow-y: visible !important; +} + +#top-level-buttons-computed { + position: relative !important; + overflow: visible !important; +} + +#actions-inner, +#actions { + position: relative; + overflow: visible !important; +} + +.ryd-dislike-count { + margin-left: 4px; + font: 500 14px / 1 "Roboto", "Arial", sans-serif; + color: var(--yt-spec-text-primary, inherit); + white-space: nowrap; + pointer-events: none; + display: inline; +} + +dislike-button-view-model, +#segmented-dislike-button, +ytd-toggle-button-renderer { + min-width: 60px !important; +} + diff --git a/return-youtube-dislike/content.js b/return-youtube-dislike/content.js new file mode 100644 index 0000000..146b9d3 --- /dev/null +++ b/return-youtube-dislike/content.js @@ -0,0 +1,457 @@ +/** + * Return YouTube Dislike — Nebula extension + * + * Uses the public Return YouTube Dislike API: + * https://returnyoutubedislikeapi.com/votes?videoId=... + * + * Inspired by / adapted from Anarios/return-youtube-dislike (GPL-3.0): + * https://github.com/Anarios/return-youtube-dislike + * Attribution: https://returnyoutubedislike.com + * + * This is a simplified page-script port for Nebula's native extension + * runtime (no chrome.* APIs, no vote submission, no premium features). + */ +(function () { + "use strict"; + + const API_BASE = "https://returnyoutubedislikeapi.com"; + const ATTR_LINK = "https://returnyoutubedislike.com"; + + let currentVideoId = null; + let inFlight = null; + let lastApplied = null; + let pollTimer = null; + + function numberFormat(value) { + const n = Number(value) || 0; + try { + return new Intl.NumberFormat(document.documentElement.lang || navigator.language || "en", { + notation: "compact", + compactDisplay: "short", + }).format(n); + } catch (_) { + return String(n); + } + } + + function getVideoId(url) { + try { + const u = new URL(url || location.href); + if (u.pathname.startsWith("/shorts/")) { + return u.pathname.split("/")[2] || null; + } + if (u.pathname.startsWith("/live/")) { + return u.pathname.split("/")[2] || null; + } + if (u.pathname.startsWith("/embed/")) { + return u.pathname.split("/")[2] || null; + } + if (u.pathname.startsWith("/clip")) { + const meta = + document.querySelector("meta[itemprop='videoId']") || + document.querySelector("meta[itemprop='identifier']"); + return meta ? meta.content : null; + } + return u.searchParams.get("v"); + } catch (_) { + return null; + } + } + + function isWatchContext() { + const path = location.pathname; + return ( + path === "/watch" || + path.startsWith("/shorts/") || + path.startsWith("/live/") || + path.startsWith("/embed/") || + path.startsWith("/clip") + ); + } + + function qs(root, selectors) { + const list = Array.isArray(selectors) ? selectors : [selectors]; + for (const sel of list) { + if (!sel) continue; + const el = (root || document).querySelector(sel); + if (el) return el; + } + return null; + } + + function getButtonsRoot() { + if (location.pathname.startsWith("/shorts/")) { + const nodes = document.querySelectorAll( + "reel-action-bar-view-model, #like-button > ytd-like-button-renderer, ytm-like-button-renderer" + ); + for (const node of nodes) { + const rect = node.getBoundingClientRect(); + if (rect.width > 0 && rect.height > 0) return node; + } + return nodes[0] || null; + } + + // Try segmented first (new YouTube design) + let el = qs(document, ["ytd-segmented-like-dislike-button-renderer"]); + if (el) return el; + + // Fallback to old design + el = qs(document, [ + "#top-level-buttons-computed", + "ytd-menu-renderer.ytd-watch-metadata", + ".slim-video-action-bar-actions", + ]); + return el || null; + } + + function getLikeButton() { + // New design (segmented) + let btn = qs(document, ["#segmented-like-button"]); + if (btn) return btn; + + // Fallback + const root = getButtonsRoot(); + if (root) { + btn = qs(root, [ + "like-button-view-model", + "yt-spec-button-shape-next", + "ytd-like-button-renderer", + ":first-child", + ]); + if (btn) return btn; + } + + return qs(document, ["like-button-view-model", "ytd-like-button-renderer"]) || null; + } + + function getDislikeButton() { + // New design (segmented) + let btn = qs(document, ["#segmented-dislike-button"]); + if (btn) return btn; + + // Fallback + const root = getButtonsRoot(); + if (root) { + btn = qs(root, [ + "dislike-button-view-model", + "yt-spec-button-shape-next", + "ytd-toggle-button-renderer", + ":nth-child(2)", + ]); + if (btn) return btn; + } + + return qs(document, ["dislike-button-view-model", "#dislike-button", "ytd-toggle-button-renderer"]) || null; + } + + function getNativeButton(container) { + return container ? qs(container, ["button", "tp-yt-paper-button#button"]) : null; + } + + function getLikeCountFromButton() { + try { + const like = getLikeButton(); + const btn = getNativeButton(like) || like; + const label = btn && (btn.getAttribute("aria-label") || btn.textContent || ""); + if (!label) return null; + + const text = String(label).trim(); + + // Parse abbreviated numbers: "28M" → 28000000, "3K" → 3000, "82" → 82 + const match = text.match(/^([\d.]+)\s*([MKmk]?)(?:\s|$)/); + if (!match) return null; + + let num = parseFloat(match[1]); + if (!Number.isFinite(num)) return null; + + const suffix = (match[2] || "").toUpperCase(); + if (suffix === "M") num *= 1_000_000; + else if (suffix === "K") num *= 1_000; + + return Math.round(num); + } catch (_) { + return null; + } + } + + function matchDislikeButtonWidth(dislikeButton) { + if (!dislikeButton) return; + try { + const likeBtn = getLikeButton(); + if (!likeBtn) return; + + const likeWidth = window.getComputedStyle(likeBtn).width; + if (!likeWidth || likeWidth === "auto") return; + + dislikeButton.style.setProperty("min-width", likeWidth, "important"); + dislikeButton.style.setProperty("flex-shrink", "0", "important"); + + const native = getNativeButton(dislikeButton); + if (native) { + native.style.setProperty("min-width", likeWidth, "important"); + native.style.setProperty("flex-shrink", "0", "important"); + } + } catch (_) { + // Ignore — cosmetic only. + } + } + + function ensureDislikeLabel(dislikeButton) { + matchDislikeButtonWidth(dislikeButton); + + let label = dislikeButton.querySelector(".ryd-dislike-count"); + if (label) return label; + + const native = getNativeButton(dislikeButton) || dislikeButton; + label = document.createElement("span"); + label.className = "ryd-dislike-count"; + label.setAttribute("data-ryd", "1"); + label.title = "Dislikes via Return YouTube Dislike — " + ATTR_LINK; + + // Prefer injecting into the button so YouTube's layout keeps the text. + const textHost = + qs(native, [ + ".yt-spec-button-shape-next__button-text-content", + ".ytSpecButtonShapeNextButtonTextContent", + ]) || native; + + // Switch icon-only dislike buttons to icon+text style when possible. + if (native && native.classList) { + native.classList.remove("yt-spec-button-shape-next--icon-button"); + native.classList.add("yt-spec-button-shape-next--icon-leading"); + } + + textHost.appendChild(label); + return label; + } + + function setDislikeText(text) { + const dislike = getDislikeButton(); + if (!dislike) return false; + const label = ensureDislikeLabel(dislike); + if (label.textContent !== text) { + label.textContent = text; + } + return true; + } + + function createOrUpdateBar(likes, dislikes) { + if (location.pathname.startsWith("/shorts/")) return; + + const likeBtn = getLikeButton(); + const dislikeBtn = getDislikeButton(); + const actions = qs(document, [ + "#top-level-buttons-computed", + "#actions-inner", + "#actions", + "#menu-container", + ]); + + if (!likeBtn || !dislikeBtn || !actions) { + console.log("[RYD] Bar creation: missing", { + likeBtn: !!likeBtn, + dislikeBtn: !!dislikeBtn, + actions: !!actions, + }); + return; + } + + const total = likes + dislikes; + const widthPercent = total > 0 ? (likes / total) * 100 : 50; + const tooltip = `${likes.toLocaleString()} / ${dislikes.toLocaleString()} — ${widthPercent.toFixed(1)}% liked`; + + const likeRect = likeBtn.getBoundingClientRect(); + const dislikeRect = dislikeBtn.getBoundingClientRect(); + const actionsRect = actions.getBoundingClientRect(); + const pillLeft = Math.max(0, likeRect.left - actionsRect.left); + const pillWidth = Math.max(0, dislikeRect.right - likeRect.left); + const pillBottom = Math.max(likeRect.bottom, dislikeRect.bottom) - actionsRect.top; + + if (!pillWidth) return; + + let tooltipEl = actions.querySelector(".ryd-tooltip"); + if (!tooltipEl) { + console.log("[RYD] Creating new bar under like/dislike buttons"); + + // Create without innerHTML to avoid Trusted Types CSP + tooltipEl = document.createElement("div"); + tooltipEl.className = "ryd-tooltip"; + + const bar = document.createElement("div"); + bar.id = "ryd-bar"; + + const barContainer = document.createElement("div"); + barContainer.id = "ryd-bar-container"; + barContainer.appendChild(bar); + tooltipEl.appendChild(barContainer); + + tooltipEl.title = tooltip + " · " + ATTR_LINK; + + if (getComputedStyle(actions).position === "static") { + actions.style.setProperty("position", "relative", "important"); + } + actions.style.setProperty("overflow", "visible", "important"); + actions.style.setProperty("padding-bottom", "10px", "important"); + + actions.appendChild(tooltipEl); + console.log("[RYD] Bar created"); + } + + tooltipEl.style.left = pillLeft + "px"; + tooltipEl.style.top = pillBottom + 2 + "px"; + tooltipEl.style.width = pillWidth + "px"; + tooltipEl.title = tooltip + " · " + ATTR_LINK; + const bar = tooltipEl.querySelector("#ryd-bar"); + if (bar) { + bar.style.width = widthPercent + "%"; + } + } + + async function fetchVotes(videoId) { + const likeCount = getLikeCountFromButton(); + const url = + API_BASE + + "/votes?videoId=" + + encodeURIComponent(videoId) + + (likeCount != null ? "&likeCount=" + encodeURIComponent(String(likeCount)) : ""); + + console.log("[RYD] Fetching:", url); + + const response = await fetch(url, { + method: "GET", + headers: { Accept: "application/json" }, + credentials: "omit", + }); + + if (response.status === 429) { + throw new Error("rate-limited"); + } + if (!response.ok) { + throw new Error("http-" + response.status); + } + + const data = await response.json(); + console.log("[RYD] Response:", data); + + if (!data || typeof data.dislikes !== "number") { + throw new Error("bad-payload"); + } + return data; + } + + async function applyForVideo(videoId) { + if (!videoId) { + console.log("[RYD] No video ID"); + return; + } + if (inFlight === videoId) { + console.log("[RYD] Already in-flight for", videoId); + return; + } + if (lastApplied === videoId && document.querySelector(".ryd-dislike-count")) { + console.log("[RYD] Already applied for", videoId); + return; + } + + console.log("[RYD] Applying for video:", videoId); + inFlight = videoId; + try { + const data = await fetchVotes(videoId); + if (getVideoId(location.href) !== videoId) { + console.log("[RYD] Video changed during fetch"); + return; + } + + const likes = getLikeCountFromButton() || Number(data.likes) || 0; + const dislikes = Number(data.dislikes) || 0; + + console.log("[RYD] Likes:", likes, "Dislikes:", dislikes); + + // Retry UI injection briefly — YouTube hydrates buttons asynchronously. + let tries = 0; + const paint = () => { + const dislikeBtn = getDislikeButton(); + console.log("[RYD] Paint attempt", tries, "- dislike button:", dislikeBtn ? "found" : "missing"); + + const ok = setDislikeText(numberFormat(dislikes)); + if (ok) { + console.log("[RYD] Successfully set dislike text"); + createOrUpdateBar(likes, dislikes); + lastApplied = videoId; + return; + } + if (++tries < 25) { + window.setTimeout(paint, 200); + } else { + console.warn("[RYD] Failed to find dislike button after 25 tries"); + } + }; + paint(); + } catch (err) { + if (getVideoId(location.href) === videoId) { + setDislikeText("—"); + } + console.error("[RYD] Error:", err.message); + } finally { + if (inFlight === videoId) inFlight = null; + } + } + + function refresh() { + if (!isWatchContext()) { + currentVideoId = null; + return; + } + const videoId = getVideoId(location.href); + if (!videoId) return; + if (videoId !== currentVideoId) { + currentVideoId = videoId; + lastApplied = null; + applyForVideo(videoId); + } else if (lastApplied !== videoId) { + applyForVideo(videoId); + } else { + // Re-paint if YouTube rebuilt the button DOM. + if (!document.querySelector(".ryd-dislike-count")) { + lastApplied = null; + applyForVideo(videoId); + } + } + } + + function start() { + refresh(); + + document.addEventListener("yt-navigate-finish", refresh, true); + window.addEventListener("yt-navigate-finish", refresh, true); + window.addEventListener("popstate", refresh); + + // YouTube SPA fallback when custom events are missed. + let lastHref = location.href; + window.setInterval(() => { + if (location.href !== lastHref) { + lastHref = location.href; + refresh(); + return; + } + if (isWatchContext() && currentVideoId && !document.querySelector(".ryd-dislike-count")) { + lastApplied = null; + refresh(); + } + }, 1500); + + const observer = new MutationObserver(() => { + if (isWatchContext() && currentVideoId && !document.querySelector(".ryd-dislike-count")) { + lastApplied = null; + refresh(); + } + }); + observer.observe(document.documentElement, { childList: true, subtree: true }); + } + + if (document.readyState === "loading") { + document.addEventListener("DOMContentLoaded", start, { once: true }); + } else { + start(); + } +})(); diff --git a/return-youtube-dislike/manifest.json b/return-youtube-dislike/manifest.json new file mode 100644 index 0000000..ae18110 --- /dev/null +++ b/return-youtube-dislike/manifest.json @@ -0,0 +1,21 @@ +{ + "id": "return-youtube-dislike", + "name": "Return YouTube Dislike", + "version": "1.0.0", + "description": "Shows YouTube dislike counts using the Return YouTube Dislike API. Based on https://github.com/Anarios/return-youtube-dislike", + "enabled": true, + "content_scripts": [ + { + "matches": [ + "*://*.youtube.com/*", + "*://youtube.com/*", + "*://*.youtu.be/*", + "*://youtu.be/*", + "*://*.youtube-nocookie.com/*" + ], + "js": ["content.js"], + "css": ["content.css"], + "run_at": "document_end" + } + ] +}