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Makes code blocks on Gemini/ChatGPT and long user messages on ChatGPT collapsible for a cleaner interface.
// ==UserScript==
// @name LLM Chat Collapser
// @name:zh-CN LLM 聊天内容折叠器
// @namespace https://github.com/miniyu157/llm-chat-collapser
// @version 25.9.29-1
// @description Makes code blocks on Gemini/ChatGPT and long user messages on ChatGPT collapsible for a cleaner interface.
// @description:zh-CN 使 Gemini 和 ChatGPT 上的代码块，以及 ChatGPT 上的长文本用户消息可折叠，以提供更整洁的界面。
// @author miniyu157
// @license MIT
// @match https://gemini.google.com/*
// @match https://chatgpt.com/*
// @icon https://www.google.com/s2/favicons?sz=64&domain=openai.com
// @grant GM_addStyle
// @run-at document-end
// @homepageURL https://github.com/miniyu157/llm-chat-collapser
// @supportURL https://github.com/miniyu157/llm-chat-collapser/issues
// ==/UserScript==
(function() {
'use strict';
GM_addStyle(`
.ucc-collapsible-header {
cursor: pointer;
position: relative;
user-select: none;
}
.ucc-arrow-indicator::before {
content: '▶';
position: absolute;
top: 50%;
transform: translateY(-50%);
font-size: 10px;
color: var(--mat-sys-color-on-surface-variant, #888);
transition: transform 0.2s ease-in-out;
}
.ucc-header-expanded::before {
transform: translateY(-50%) rotate(90deg);
}
.gemini-header-padding {
padding-left: 32px !important;
}
.gemini-arrow-pos::before {
left: 12px;
}
.chatgpt-header-padding {
padding-left: 24px !important;
}
.chatgpt-arrow-pos::before {
left: 8px;
}
.ucc-user-text-clamp {
display: -webkit-box;
-webkit-box-orient: vertical;
-webkit-line-clamp: 3;
overflow: hidden;
}
`);
const processAttribute = 'data-ucc-processed';
function applyDisplayCollapse(header, content) {
header.classList.add('ucc-collapsible-header', 'ucc-arrow-indicator');
content.style.display = 'none';
header.addEventListener('click', (event) => {
if (event.target.closest('button, a')) return;
header.classList.toggle('ucc-header-expanded');
content.style.display = content.style.display === 'none' ? '' : 'none';
});
}
function applyLineClampCollapse(header, content) {
header.classList.add('ucc-collapsible-header', 'ucc-arrow-indicator');
content.classList.add('ucc-user-text-clamp');
header.addEventListener('click', (event) => {
if (event.target.closest('button, a')) return;
header.classList.toggle('ucc-header-expanded');
content.classList.toggle('ucc-user-text-clamp');
});
}
function processGeminiCodeBlock(element) {
if (element.hasAttribute(processAttribute)) return;
element.setAttribute(processAttribute, 'true');
const header = element.querySelector('.code-block-decoration');
const content = element.querySelector('.formatted-code-block-internal-container');
if (header && content) {
header.classList.add('gemini-header-padding', 'gemini-arrow-pos');
applyDisplayCollapse(header, content);
}
}
function processChatGPTCodeBlock(element) {
if (element.hasAttribute(processAttribute)) return;
element.setAttribute(processAttribute, 'true');
const header = element.querySelector('.rounded-t-2xl');
const content = element.querySelector('.p-4');
if (header && content && !header.closest('.result-streaming')) {
header.classList.add('chatgpt-header-padding', 'chatgpt-arrow-pos');
applyDisplayCollapse(header, content);
}
}
function processChatGPTUserMessage(element) {
if (element.hasAttribute(processAttribute)) return;
element.setAttribute(processAttribute, 'true');
const textContainer = element.querySelector('.whitespace-pre-wrap');
if (!textContainer) return;
const lineCount = textContainer.textContent.split('\n').length;
const isLong = lineCount > 3 || (lineCount === 1 && textContainer.textContent.length > 200);
if (isLong) {
const bubble = element.querySelector('.user-message-bubble-color');
if (bubble) {
bubble.classList.add('chatgpt-header-padding', 'chatgpt-arrow-pos');
applyLineClampCollapse(bubble, textContainer);
}
}
}
function scanAndProcess(node) {
if (!node || node.nodeType !== Node.ELEMENT_NODE) return;
const host = window.location.hostname;
const selectorMap = {
'gemini.google.com': {
[`code-block:not([${processAttribute}])`]: processGeminiCodeBlock,
},
'chatgpt.com': {
[`pre:not([${processAttribute}])`]: processChatGPTCodeBlock,
[`div[data-message-author-role="user"]:not([${processAttribute}])`]: processChatGPTUserMessage,
}
};
for (const hostKey in selectorMap) {
if (host.includes(hostKey)) {
for (const selector in selectorMap[hostKey]) {
const elements = node.matches(selector) ? [node] : node.querySelectorAll(selector);
elements.forEach(selectorMap[hostKey][selector]);
}
}
}
}
const observer = new MutationObserver((mutations) => {
for (const mutation of mutations) {
if (mutation.addedNodes.length) {
mutation.addedNodes.forEach(node => scanAndProcess(node));
}
}
});
observer.observe(document.body, {
childList: true,
subtree: true
});
scanAndProcess(document.body);
})();