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支持几乎所有的ai对话网页的 Markdown 导出 + 图像导出。需要支持新网址，在@match中自行追加使用。主要用于：claude｜chatgpt｜gemini｜grok｜doubao｜qwen｜deepseek｜minimax｜kimi｜yuanbao｜chatglm｜openrouter｜poe等。
// ==UserScript== // @name ChatShare - AI 对话下载器 // @namespace https://github.com/mr-hanlu/chatshare // @version 0.2.1 // @description 支持几乎所有的ai对话网页的 Markdown 导出 + 图像导出。需要支持新网址，在@match中自行追加使用。主要用于：claude｜chatgpt｜gemini｜grok｜doubao｜qwen｜deepseek｜minimax｜kimi｜yuanbao｜chatglm｜openrouter｜poe等。 // @author hanlu // @license MIT // @icon 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// @match https://aistudio.google.com/* // @match https://gemini.google.com/* // @match https://notebooklm.google.com/* // @match https://claude.ai/* // @match https://chatgpt.com/* // @match https://chat.openai.com/* // @match https://x.com/* // @match https://x.com/i/grok* // @match https://grok.com/* // @match https://*.grok.com/* // @match https://*.doubao.com/* // @match https://qwen.ai/* // @match https://chat.qwen.ai/* // @match https://www.qianwen.com/* // @match https://bailian.console.aliyun.com/* // @match https://www.kimi.com/* // @match https://chat.deepseek.com/* // @match https://hunyuan.tencent.com/* // @match https://yuanbao.tencent.com/* // @match https://chat.z.ai/* // @match https://chatglm.cn/* // @match https://agent.minimaxi.com/* // @match https://aistudio.xiaomimimo.com/* // @match https://openrouter.ai/* // @match https://poe.com/* // @require https://cdn.jsdelivr.net/npm/[email protected]/dist/turndown.js // @require https://cdn.jsdelivr.net/npm/[email protected]/dist/turndown-plugin-gfm.js // @require https://cdn.jsdelivr.net/npm/[email protected]/dist/html-to-image.min.js // @resource katexCSS https://cdn.jsdelivr.net/npm/[email protected]/dist/katex.min.css // @grant GM_getResourceText // @run-at document-end // ==/UserScript== (function () { 'use strict'; if (window.self !== window.top) return; if (document.getElementById('chatshare-extractor-host')) return; let isSelectMode = false; let selectedElements = new Set(); let currentHoverElement = null; let isPanelOpen = false; let isDragging = false, hasDragged = false; let startX, startY, initLeft, initTop; let isProcessing = false; let hasWarnedLongImage = false; // ================= UI 构建与守护 ================= const host = document.createElement('div'); host.id = 'chatshare-extractor-host'; host.style.cssText = `position:fixed;z-index:2147483647;top:30%;left:auto;right:10px;transition:left .35s cubic-bezier(.22,1,.36,1),right .35s cubic-bezier(.22,1,.36,1);`; const shadow = host.attachShadow({ mode: 'open' }); function mountHost() { if (!document.documentElement.contains(host)) document.documentElement.appendChild(host); } mountHost(); const spaGuardObserver = new MutationObserver(mountHost); spaGuardObserver.observe(document.documentElement, { childList: true, subtree: false }); const style = document.createElement('style'); style.textContent = ` :host{all:initial} .fab{width:40px;height:40px;border-radius:20px;display:flex;align-items:center;justify-content:center;font-size:20px;cursor:pointer;background:rgba(255,255,255,.9);backdrop-filter:blur(10px);border:1px solid rgba(0,0,0,.06);box-shadow:0 4px 16px rgba(0,0,0,.15);transition:all .2s ease;position:relative;animation:float 3s ease-in-out infinite} @keyframes float{0%,100%{transform:translateY(0)}50%{transform:translateY(-2px)}} .fab:hover{transform:scale(1.08);box-shadow:0 8px 24px rgba(0,0,0,.2)} .panel{position:absolute;top:0;width:260px;border-radius:14px;overflow:hidden;background:rgba(255,255,255,.96);backdrop-filter:blur(16px);border:1px solid rgba(0,0,0,.08);box-shadow:0 12px 40px rgba(0,0,0,.25);display:flex;flex-direction:column;font-family:system-ui,-apple-system,sans-serif;user-select:none;visibility:hidden;pointer-events:none;transform:scale(.92);opacity:0;transition:all .25s ease} .panel.show{visibility:visible;pointer-events:auto;transform:scale(1);opacity:1} .panel.left{left:48px}.panel.right{right:48px} .header{padding:12px 14px;font-size:13px;font-weight:600;background:#f9fafb;cursor:grab;display:flex;justify-content:space-between;align-items:center;color:#374151;border-bottom:1px solid rgba(0,0,0,.05)} .close-btn{cursor:pointer;color:#9ca3af;font-size:18px;padding:2px;border-radius:4px}.close-btn:hover{color:#ef4444;background:rgba(0,0,0,.05)} .body{padding:12px;display:flex;flex-direction:column;gap:8px} .stats{font-size:12px;color:#6b7280;text-align:center;margin:2px 0;padding-bottom:4px;border-bottom:1px dashed #e5e7eb} .stats span{color:#3b82f6;font-weight:700;font-size:14px} button{border:none;padding:10px;border-radius:8px;font-weight:600;cursor:pointer;transition:all .15s;font-size:13px} button:active{transform:scale(.98)}button:disabled{opacity:.5;cursor:not-allowed;transform:none} .btn-md{background:#10b981;color:#fff}.btn-md:hover{background:#059669} .btn-img{background:#f59e0b;color:#fff}.btn-img:hover{background:#d97706} .btn-md,.btn-img{display:none} .sc-toast { position: fixed; top: 20px; left: 50%; transform: translate(-50%, -20px); background: rgba(17,24,39,.95); color: #fff; padding: 12px 24px; border-radius: 8px; font-size: 14px; font-family: system-ui, sans-serif; font-weight: 500; opacity: 0; pointer-events: none; transition: all 0.3s cubic-bezier(0.34, 1.56, 0.64, 1); z-index: 2147483647; box-shadow: 0 8px 24px rgba(0,0,0,.15); display: flex; align-items: center; gap: 8px; white-space: nowrap; } .sc-toast.show { transform: translate(-50%, 0); opacity: 1; } .sc-toast.error { background: #ef4444; } .sc-toast.warn { background: #f59e0b; } .sc-toast.info { background: #3b82f6; } `; shadow.appendChild(style); const fab = document.createElement('div'); fab.className = 'fab right'; fab.textContent = '🤖'; const panel = document.createElement('div'); panel.className = 'panel'; const header = document.createElement('div'); header.className = 'header'; header.id = 'drag-handle'; const titleSpan = document.createElement('span'); titleSpan.textContent = '📦 对话提取器'; const btnClose = document.createElement('span'); btnClose.className = 'close-btn'; btnClose.textContent = '×'; header.append(titleSpan, btnClose); const body = document.createElement('div'); body.className = 'body'; const statsContainer = document.createElement('div'); statsContainer.className = 'stats'; statsContainer.append(document.createTextNode('已选中 ')); const countSpan = document.createElement('span'); countSpan.textContent = '0'; statsContainer.append(countSpan, document.createTextNode(' 段')); const btnMd = document.createElement('button'); btnMd.className = 'btn-md'; btnMd.textContent = '📄 导出 Markdown'; const btnImg = document.createElement('button'); btnImg.className = 'btn-img'; btnImg.textContent = '🖼️ 导出图像'; body.append(statsContainer, btnMd, btnImg); panel.append(header, body); const toastEl = document.createElement('div'); toastEl.className = 'sc-toast'; shadow.appendChild(toastEl); shadow.appendChild(fab); shadow.appendChild(panel); const dragHandle = header; // ================= 全局 UI Toast 系统 ================= let toastTimer = null; function showToast(msg, type = 'info') { toastEl.textContent = msg; toastEl.className = `sc-toast show ${type}`; clearTimeout(toastTimer); toastTimer = setTimeout(() => { toastEl.classList.remove('show'); }, 3500); } // ================= 拖拽及面板控制 ================= function attachDrag(t) { t.addEventListener('mousedown', e => { if (e.button !== 0 || isProcessing) return; isDragging = true; hasDragged = false; startX = e.clientX; startY = e.clientY; const r = host.getBoundingClientRect(); initLeft = r.left; initTop = r.top; host.style.transition = 'none'; host.style.left = r.left + 'px'; host.style.right = 'auto'; e.preventDefault(); }); } attachDrag(fab); attachDrag(dragHandle); window.addEventListener('mousemove', e => { if (!isDragging) return; if (Math.abs(e.clientX - startX) > 5 || Math.abs(e.clientY - startY) > 5) { hasDragged = true; host.style.left = (initLeft + e.clientX - startX) + 'px'; host.style.top = (initTop + e.clientY - startY) + 'px'; } }); window.addEventListener('mouseup', () => { if (isDragging) { isDragging = false; snapToEdge(); } }); let resizeTimer = null; window.addEventListener('resize', () => { clearTimeout(resizeTimer); resizeTimer = setTimeout(() => { if (!isDragging && host.getBoundingClientRect) { snapToEdge(); if (isPanelOpen) adjustPanelPosition(); } }, 150); }); function snapToEdge() { host.style.transition = ''; const r = host.getBoundingClientRect(); if (r.left + r.width / 2 < window.innerWidth / 2) { host.style.left = '10px'; fab.classList.replace('right', 'left'); } else { host.style.left = (window.innerWidth - 48) + 'px'; fab.classList.replace('left', 'right'); } } function adjustPanelPosition() { const r = host.getBoundingClientRect(); panel.classList.remove('left', 'right'); panel.classList.add(window.innerWidth - r.right < 270 ? 'right' : 'left'); } fab.addEventListener('click', () => { if (hasDragged || isProcessing) return; isPanelOpen = !isPanelOpen; if (isPanelOpen) { adjustPanelPosition(); panel.classList.add('show'); fab.style.transform = 'scale(.85)'; enterSelectMode(); } else closePanelAndExit(); }); btnClose.addEventListener('click', () => { if (!isProcessing) closePanelAndExit(); }); document.addEventListener('keydown', e => { if (e.key === 'Escape' && isPanelOpen && !isProcessing) closePanelAndExit(); }); function closePanelAndExit() { isPanelOpen = false; panel.classList.remove('show'); fab.style.transform = ''; exitSelectMode(); } // ================= 选取模式 ================= function applyHighlight(el) { if (el && el.style) { el.style.backgroundColor = 'rgba(16, 185, 129, 0.1)'; el.style.boxShadow = 'inset 0 0 0 2px #10b981'; el.style.outline = 'none'; el.setAttribute('data-sc-selected', 'true'); } } function removeHighlight(el) { if (el && el.style) { el.style.removeProperty('background-color'); el.style.removeProperty('box-shadow'); el.style.removeProperty('outline'); el.removeAttribute('data-sc-selected'); } } function applyHover(el) { if (el && el.style && el.getAttribute('data-sc-selected') !== 'true') el.style.outline = '2px dashed #3b82f6'; } function removeHover(el) { if (el && el.style && el.getAttribute('data-sc-selected') !== 'true') el.style.removeProperty('outline'); } function forceClearAll() { if (currentHoverElement) { removeHover(currentHoverElement); currentHoverElement = null; } selectedElements.forEach(el => removeHighlight(el)); selectedElements.clear(); countSpan.textContent = '0'; hasWarnedLongImage = false; } function enterSelectMode() { isSelectMode = true; document.addEventListener('mouseover', onMouseOver, true); document.addEventListener('mouseout', onMouseOut, true); document.addEventListener('click', onDocClick, true); statsContainer.style.display = 'block'; btnMd.style.display = 'block'; btnImg.style.display = 'block'; } function exitSelectMode() { isSelectMode = false; document.removeEventListener('mouseover', onMouseOver, true); document.removeEventListener('mouseout', onMouseOut, true); document.removeEventListener('click', onDocClick, true); statsContainer.style.display = 'none'; btnMd.style.display = 'none'; btnImg.style.display = 'none'; forceClearAll(); } function onMouseOver(e) { if (isProcessing) return; if (e.composedPath().includes(host)) return; const el = e.target.closest('div, article, li, p, section') || e.target; if (currentHoverElement === el) return; removeHover(currentHoverElement); currentHoverElement = el; applyHover(el); } function onMouseOut(e) { if (isProcessing) return; if (e.composedPath().includes(host)) return; removeHover(currentHoverElement); currentHoverElement = null; } function calcTotalEstimatedHeight() { let total = 0; selectedElements.forEach(s => { total += (s.offsetHeight || 0) + 70; }); return total; } function onDocClick(e) { if (isProcessing) { e.preventDefault(); e.stopPropagation(); return; } if (!e.isTrusted || e.composedPath().includes(host)) return; if (e.target.closest('a, button, [role="button"], input, textarea, select')) return; e.preventDefault(); e.stopPropagation(); const el = currentHoverElement || e.target.closest('div, article, li, p, section') || e.target; if (!el) return; const isSelected = el.getAttribute('data-sc-selected') === 'true'; if (isSelected) { removeHighlight(el); selectedElements.delete(el); if (currentHoverElement === el) applyHover(el); } else { const toRemove = []; selectedElements.forEach(s => { if (s.contains(el) || el.contains(s)) toRemove.push(s); }); toRemove.forEach(s => { removeHighlight(s); selectedElements.delete(s); }); applyHighlight(el); selectedElements.add(el); if (currentHoverElement === el) removeHover(el); const th = calcTotalEstimatedHeight(); if (th > 16000 && !hasWarnedLongImage) { showToast('📏 已超出长图安全极限，将无法导出图像，但可无限导出 Markdown！', 'warn'); hasWarnedLongImage = true; } } countSpan.textContent = selectedElements.size; } // ================= 基础工具 ================= const STYLE_WHITELIST = ['color', 'backgroundColor', 'borderColor', 'outlineColor', 'fill', 'stroke', 'fontFamily', 'fontSize', 'fontWeight', 'fontStyle', 'lineHeight', 'letterSpacing', 'textDecoration', 'textAlign', 'whiteSpace', 'display', 'width', 'maxWidth', 'minWidth', 'overflow', 'overflowX', 'overflowY', 'boxSizing', 'paddingTop', 'paddingRight', 'paddingBottom', 'paddingLeft', 'marginTop', 'marginRight', 'marginBottom', 'marginLeft', 'flexDirection', 'flexWrap', 'flexGrow', 'flexShrink', 'flexBasis', 'alignItems', 'alignSelf', 'justifyContent', 'gap', 'gridTemplateColumns', 'gridTemplateRows', 'gridColumn', 'gridRow', 'borderTopWidth', 'borderRightWidth', 'borderBottomWidth', 'borderLeftWidth', 'borderStyle', 'borderRadius', 'opacity', 'verticalAlign']; function guessRole(el) { const r = (el.dataset.messageAuthorRole || el.dataset.role || el.dataset.sender || '').toLowerCase(); if (r.includes('user')) return 'user'; if (r.includes('assistant') || r.includes('ai')) return 'ai'; const html = el.innerHTML.toLowerCase(); if (html.includes('author-role="user"')) return 'user'; if (html.includes('author-role="assistant"')) return 'ai'; return (el.querySelectorAll('pre,code,table,.katex').length > 0 || el.innerText.trim().length > 150) ? 'ai' : 'user'; } function getSortedElements() { return Array.from(selectedElements).sort((a, b) => a.compareDocumentPosition(b) & Node.DOCUMENT_POSITION_FOLLOWING ? -1 : 1); } function isMathNode(n) { if (!n || n.nodeType !== Node.ELEMENT_NODE) return false; if (n.tagName.toUpperCase() === 'MATH' || n.ownerSVGElement) return true; const c = typeof n.className === 'string' ? n.className : ''; return c.includes('katex') || c.includes('MathJax') || !!n.closest('.katex, .MathJax'); } // ================= 💎 Markdown 专属深度外科手术 ================= function purifyCodeBlocksForMD(node) { const pres = Array.from(node.querySelectorAll('pre')); pres.forEach(pre => { let codeText = ''; const table = pre.querySelector('table.hljs-ln, table.linenumber'); if (table) { const codeTds = table.querySelectorAll('td.hljs-ln-code, td.code'); codeText = Array.from(codeTds).map(td => td.textContent).join('\n'); } else { const codeEl = pre.querySelector('code'); codeText = (codeEl || pre).textContent; } let lang = ''; const codeEl = pre.querySelector('code'); if (codeEl && codeEl.className) { const match = codeEl.className.match(/language-(\w+)/i); if (match) lang = match[1]; } let widget = pre; let current = pre.parentElement; while (current && current !== node && current.tagName === 'DIV') { if (current.querySelectorAll('pre').length > 1) break; const extraTextLength = current.textContent.length - pre.textContent.length; if (extraTextLength < 150) { widget = current; if (!lang) { const langMatch = current.textContent.match(/(python|javascript|js|html|css|bash|shell|json|markdown|md|java|cpp|c|go|rust|ruby|php|sql|yaml|xml|typescript|ts)\b/i); if (langMatch) lang = langMatch[1].toLowerCase(); } current = current.parentElement; } else { break; } } const cleanPre = document.createElement('pre'); const cleanCode = document.createElement('code'); if (lang) cleanCode.className = `language-${lang}`; cleanCode.textContent = codeText; cleanPre.appendChild(cleanCode); try { widget.parentElement.replaceChild(cleanPre, widget); } catch (e) { } }); } function purifyMathForMD(node) { const replaceWithMath = (target, tex, isBlock) => { const span = document.createElement('span'); span.className = 'chatshare-math'; span.textContent = isBlock ? `\n$$ ${tex} $$\n` : `$${tex}$`; try { target.parentElement.replaceChild(span, target); } catch (e) { } }; node.querySelectorAll('.katex').forEach(k => { const annotation = k.querySelector('annotation[encoding="application/x-tex"]'); if (annotation) { const isBlock = k.parentElement?.classList.contains('katex-display'); replaceWithMath(isBlock ? k.parentElement : k, annotation.textContent, isBlock); } }); node.querySelectorAll('mjx-container').forEach(m => { const mathElement = m.querySelector('math'); let tex = mathElement ? mathElement.getAttribute('alttext') : ''; if (!tex) { const script = m.nextElementSibling; if (script && script.tagName === 'SCRIPT' && script.type.includes('math/tex')) tex = script.textContent; } if (tex) replaceWithMath(m, tex, m.getAttribute('display') === 'block'); }); } function purifyHeadingsForMD(node) { const els = Array.from(node.querySelectorAll('div, p, span')); els.forEach(el => { if (!node.contains(el)) return; if (el.closest('h1, h2, h3, h4, h5, h6, strong, b')) return; if (['H1', 'H2', 'H3', 'H4', 'H5', 'H6', 'STRONG', 'B', 'PRE', 'CODE', 'TH', 'TD', 'LI'].includes(el.tagName)) return; const fw = el.style.fontWeight; const fz = el.style.fontSize; const isBold = fw === 'bold' || fw === '700' || fw === '800' || fw === '900' || parseInt(fw, 10) >= 600; if (isBold) { const text = el.textContent.trim(); if (text.length > 0 && text.length < 150 && el.children.length <= 2) { let isHeader = false; if (fz && fz.endsWith('px') && parseFloat(fz) >= 18) isHeader = true; else if (fz && (fz.endsWith('em') || fz.endsWith('rem')) && parseFloat(fz) >= 1.2) isHeader = true; if (isHeader) { const h = document.createElement('h3'); while (el.firstChild) { h.appendChild(el.firstChild); } try { el.parentElement.replaceChild(h, el); } catch (e) { } } else { if (el.tagName === 'DIV' || el.tagName === 'P') { if (!el.querySelector('strong')) { const strong = document.createElement('strong'); while (el.firstChild) { strong.appendChild(el.firstChild); } el.appendChild(strong); } } else if (el.tagName === 'SPAN') { const strong = document.createElement('strong'); while (el.firstChild) { strong.appendChild(el.firstChild); } try { el.parentElement.replaceChild(strong, el); } catch (e) { } } } } } }); } // ================= Markdown 核心导出引擎 ================= btnMd.addEventListener('click', () => { if (selectedElements.size === 0) { showToast('⚠️ 请先选择内容！', 'warn'); return; } const td = new TurndownService({ headingStyle: 'atx', codeBlockStyle: 'fenced' }); if (typeof turndownPluginGfm !== 'undefined') td.use(turndownPluginGfm.gfm); td.addRule('math', { filter: function (node) { return node.nodeName === 'SPAN' && node.className === 'chatshare-math'; }, replacement: function (content, node) { return node.textContent; } }); td.addRule('hr', { filter: 'hr', replacement: function () { return '\n\n---\n\n'; } }); let md = ''; getSortedElements().forEach(el => { const role = guessRole(el); const dummyParent = document.createElement('div'); const clone = el.cloneNode(true); inlineComputedStylesIterative(el, clone); dummyParent.appendChild(clone); purifyCodeBlocksForMD(dummyParent); purifyMathForMD(dummyParent); purifyHeadingsForMD(dummyParent); dummyParent.querySelectorAll('button,[role="button"],script,style,.action-btn,.copy-btn,svg').forEach(n => n.remove()); let block = td.turndown(dummyParent); md += role === 'user' ? `### 👤 User\n\n> ${block.replace(/\n/g, '\n> ')}\n\n---\n\n` : `### 🤖 AI\n\n${block}\n\n---\n\n`; }); downloadFile(md, 'md', 'text/markdown;charset=utf-8'); showToast('✅ Markdown 导出成功！', 'info'); closePanelAndExit(); }); // ================= 图像导出引擎逻辑 ================= function inlineComputedStylesIterative(origRoot, cloneRoot) { const stack = [{ orig: origRoot, clone: cloneRoot }]; while (stack.length > 0) { const { orig, clone } = stack.pop(); if (clone.nodeType === Node.ELEMENT_NODE) { const tag = clone.tagName.toUpperCase(); if (tag === 'BUTTON' || tag === 'SCRIPT' || tag === 'STYLE' || tag === 'NOSCRIPT' || clone.classList.contains('copy-btn') || clone.classList.contains('action-btn')) { clone.remove(); continue; } if (tag === 'IMG') { clone.dataset.origW = orig.clientWidth || 0; clone.dataset.origH = orig.clientHeight || 0; } } if (orig.nodeType === Node.ELEMENT_NODE && clone.nodeType === Node.ELEMENT_NODE && !isMathNode(orig)) { const comp = window.getComputedStyle(orig); if (comp) { if (comp.display === 'none') { clone.style.display = 'none'; continue; } for (const p of STYLE_WHITELIST) { let v = comp[p]; if (!v || (p === 'width' && (v === 'auto' || v.endsWith('%')))) continue; clone.style[p] = v; } } } if (orig.nodeType === Node.ELEMENT_NODE && orig.tagName.toUpperCase() === 'SVG') continue; if (orig.nodeType === Node.ELEMENT_NODE && !isMathNode(orig)) { const minLen = Math.min(orig.childNodes.length, clone.childNodes.length); for (let i = 0; i < minLen; i++) stack.push({ orig: orig.childNodes[i], clone: clone.childNodes[i] }); } } } function stripExternalAttrs(root) { const walk = (n) => { if (n.nodeType !== Node.ELEMENT_NODE || isMathNode(n)) return; if (n.tagName.toUpperCase() === 'SVG' && !n.getAttribute('xmlns')) { n.setAttribute('xmlns', 'http://www.w3.org/2000/svg'); } n.removeAttribute('class'); n.removeAttribute('id'); for (let c of n.childNodes) walk(c); }; walk(root); } function resetLayout(root) { const allNodes = [root, ...root.querySelectorAll('*')]; allNodes.forEach(el => { if (el.tagName === 'IMG' || el.ownerSVGElement || isMathNode(el)) return; el.style.overflow = 'visible'; el.style.maxHeight = 'none'; el.style.height = 'auto'; if (['fixed', 'sticky', 'absolute'].includes(el.style.position)) { el.style.position = 'relative'; el.style.top = el.style.left = el.style.bottom = el.style.right = el.style.zIndex = ''; } }); } // 🟢 核心防御1：提前铲除多媒体炸弹和 HTTP 不安全图片 function sanitizeDOMForImage(root) { // 彻底移除会导致 htmlToImage 崩溃的多媒体标签 root.querySelectorAll('iframe, video, audio, object, embed').forEach(el => el.remove()); // 如果在安全环境(HTTPS)下，强行干掉一切 HTTP 的图片引用，用透明占位代替 if (location.protocol === 'https:') { const blankBase64 = 'data:image/gif;base64,R0lGODlhAQABAIAAAAAAAP///yH5BAEAAAAALAAAAAABAAEAAAIBRAA7'; // 处理标签属性 root.querySelectorAll('[src],[href],[poster],[data-src]').forEach(el => { ['src', 'href', 'poster', 'data-src'].forEach(attr => { const v = el.getAttribute(attr); if (v && v.startsWith('http://')) { el.setAttribute(attr, blankBase64); } }); }); // 处理 CSS 背景图 root.querySelectorAll('*').forEach(el => { if (el.style && el.style.backgroundImage && el.style.backgroundImage.includes('http://')) { el.style.backgroundImage = 'none'; } }); } } function fixRelativeUrls(root) { const base = location.origin + location.pathname; root.querySelectorAll('[src],[href],[poster],[data-src]').forEach(el => { ['src', 'href', 'poster', 'xlink:href', 'data-src'].forEach(attr => { const v = el.getAttribute(attr); if (v && !v.startsWith('data:') && !v.match(/^https?:\/\//)) { try { el.setAttribute(attr, new URL(v, base).href); } catch { } } }); }); } async function preProcessImages(root) { const imgs = Array.from(root.querySelectorAll('img')); const promises = imgs.map(async (img) => { const src = img.getAttribute('src') || img.getAttribute('data-src'); if (!src || src.startsWith('data:')) return; return new Promise((resolve) => { const imgObj = new Image(); imgObj.crossOrigin = 'anonymous'; const timerId = setTimeout(() => resolve(), 3000); imgObj.onload = () => { clearTimeout(timerId); let w = parseInt(img.dataset.origW) || imgObj.naturalWidth; let h = parseInt(img.dataset.origH) || imgObj.naturalHeight; if (w === 0) w = imgObj.naturalWidth; if (h === 0) h = imgObj.naturalHeight; const MAX_DIM = 800; if (w > MAX_DIM || h > MAX_DIM) { const ratio = Math.min(MAX_DIM / w, MAX_DIM / h); w = Math.round(w * ratio); h = Math.round(h * ratio); } if (w <= 0 || h <= 0) return resolve(); const canvas = document.createElement('canvas'); canvas.width = w; canvas.height = h; const ctx = canvas.getContext('2d'); ctx.fillStyle = '#ffffff'; ctx.fillRect(0, 0, w, h); ctx.drawImage(imgObj, 0, 0, w, h); try { img.src = canvas.toDataURL('image/jpeg', 0.85); img.removeAttribute('srcset'); } catch (e) { } resolve(); }; imgObj.onerror = () => { clearTimeout(timerId); // 出错时立刻使用空白图，避免污染 try { img.src = 'data:image/gif;base64,R0lGODlhAQABAIAAAAAAAP///yH5BAEAAAAALAAAAAABAAEAAAIBRAA7'; } catch (e) { } resolve(); }; imgObj.src = !src.startsWith('http') ? new URL(src, location.origin).href : src; }); }); await Promise.all(promises); } btnImg.addEventListener('click', async () => { if (selectedElements.size === 0) { showToast('⚠️ 请先选择内容！', 'warn'); return; } if (typeof window.htmlToImage === 'undefined') { showToast('❌ 渲染库加载失败，请检查网络。', 'error'); return; } const estHeight = calcTotalEstimatedHeight(); if (estHeight > 20000) { showToast('❌ 当前内容过长，超出图像生成极限。请减少选中段落，或直接使用 Markdown 导出！', 'error'); return; } if (isProcessing) return; isProcessing = true; if (currentHoverElement) { removeHover(currentHoverElement); currentHoverElement = null; } btnImg.disabled = true; btnImg.textContent = '⏳ 拉取字体/资源中(初次较慢)...'; try { const blobData = await renderToCanvas(); if (blobData) { downloadFile(blobData, 'jpg', 'image/jpeg'); showToast('✅ 图像已成功保存！', 'info'); } } catch (e) { console.error('[ChatShare Error]:', e); // 🟢 核心防御3：如果依然有错，捕获真实的错误信息而不只是 undefined const msg = (e && e.message) ? e.message : (typeof e === 'string' ? e : '资源跨域拦截或被污染，建议仅导出 Markdown'); showToast(`❌ 生成失败：${msg}`, 'error'); } finally { isProcessing = false; btnImg.disabled = false; btnImg.textContent = '🖼️ 导出图像'; closePanelAndExit(); } }); async function renderToCanvas() { const isDark = window.matchMedia('(prefers-color-scheme:dark)').matches; const bg = isDark ? '#111827' : '#f3f4f6'; const cardBg = isDark ? '#1f2937' : '#ffffff'; const border = isDark ? 'rgba(255,255,255,.08)' : 'rgba(0,0,0,.06)'; const text = isDark ? '#e5e7eb' : '#111827'; await loadCSS(); const outerWrapper = document.createElement('div'); outerWrapper.className = 'sc-export-wrapper'; outerWrapper.style.cssText = `position: fixed; left: -99999px; top: 0; display: inline-block; flex-direction: column;`; const wrapper = document.createElement('div'); wrapper.style.cssText = `padding: 40px; background: ${bg}; font-family: system-ui, -apple-system, sans-serif; color: ${text}; line-height: 1.6; overflow: visible; box-sizing: border-box; display: inline-block; min-width: 850px;`; outerWrapper.appendChild(wrapper); const card = document.createElement('div'); card.style.cssText = `background: ${cardBg}; border-radius: 16px; border: 1px solid ${border}; box-shadow: 0 8px 30px rgba(0,0,0,.12); box-sizing: border-box; width: 100%;`; wrapper.appendChild(card); const fragment = document.createDocumentFragment(); const sortedEls = getSortedElements(); for (let i = 0; i < sortedEls.length; i++) { const el = sortedEls[i]; const role = guessRole(el); const clone = el.cloneNode(true); stripExternalAttrs(clone); inlineComputedStylesIterative(el, clone); resetLayout(clone); fixRelativeUrls(clone); sanitizeDOMForImage(clone); // 🟢 介入：洗劫引发崩溃的多媒体和 HTTP 图片节点 clone.style.removeProperty('background-color'); clone.style.removeProperty('box-shadow'); clone.style.removeProperty('outline'); const wrap = document.createElement('div'); wrap.style.cssText = `box-sizing: border-box; padding: 24px 30px; ${i < sortedEls.length - 1 ? `border-bottom: 1px solid ${border}` : ''}; overflow: visible;`; const head = document.createElement('div'); head.style.cssText = `font-weight: 600; margin-bottom: 10px; font-size: 14px; color: ${role === 'user' ? '#3b82f6' : '#10b981'};`; head.textContent = role === 'user' ? '👤 User' : '🤖 AI'; wrap.append(head, clone); fragment.appendChild(wrap); if ((i + 1) % 5 === 0 || i === sortedEls.length - 1) { btnImg.textContent = `⏳ 处理节点 ${i + 1}/${sortedEls.length}...`; await new Promise(r => setTimeout(r, 0)); } } card.appendChild(fragment); btnImg.textContent = `⏳ 压缩图像资源...`; await preProcessImages(card); btnImg.textContent = `⏳ 计算排版边界...`; document.body.appendChild(outerWrapper); await document.fonts.ready; wrapper.offsetHeight; await new Promise(r => requestAnimationFrame(r)); let realCardW = card.scrollWidth; const MIN_CARD_W = 770; if (realCardW < MIN_CARD_W) realCardW = MIN_CARD_W; const finalWidth = realCardW + 80; const finalHeight = wrapper.scrollHeight; outerWrapper.style.width = finalWidth + 'px'; wrapper.style.width = finalWidth + 'px'; card.style.width = realCardW + 'px'; await new Promise(r => requestAnimationFrame(r)); btnImg.textContent = `⏳ 极速生成图层...`; let pr = 1.5; if (finalHeight * 1.5 <= 16000) pr = 1.5; else if (finalHeight * 1.25 <= 16000) pr = 1.25; else if (finalHeight * 1.0 <= 16000) pr = 1.0; else if (finalHeight * 0.8 <= 16000) pr = 0.8; else { showToast('🚧 最终排版高度极大超限，为防崩溃已取消。请使用 Markdown 导出！', 'error'); if (document.body.contains(outerWrapper)) document.body.removeChild(outerWrapper); return null; } try { // 🟢 核心防御2：allowTaint 改为 false，严禁污染的 Canvas，并利用 imagePlaceholder 安全跳过坏图 const blob = await window.htmlToImage.toBlob(wrapper, { quality: 0.88, backgroundColor: bg, pixelRatio: pr, width: finalWidth, height: finalHeight, cacheBust: false, useCORS: true, allowTaint: false, imagePlaceholder: 'data:image/gif;base64,R0lGODlhAQABAIAAAAAAAP///yH5BAEAAAAALAAAAAABAAEAAAIBRAA7', filter: (node) => { if (node.tagName) { const t = node.tagName.toUpperCase(); if (['SCRIPT', 'NOSCRIPT', 'VIDEO', 'AUDIO', 'IFRAME', 'OBJECT'].includes(t)) return false; } return true; } }); return blob; } finally { if (document.body.contains(outerWrapper)) document.body.removeChild(outerWrapper); } } // 🟢 增强版 loadCSS：加入防重复机制，彻底修复相对路径 404 引发的漫长超时问题 function loadCSS() { return new Promise((resolve) => { if (document.getElementById('chatshare-katex-style')) return resolve(); try { let cssText = GM_getResourceText("katexCSS"); if (cssText) { // 将相对路径替换为 CDN 绝对路径 cssText = cssText.replace(/url\((?:'|")?fonts\//g, 'url(https://cdn.jsdelivr.net/npm/[email protected]/dist/fonts/'); const style = document.createElement('style'); style.id = 'chatshare-katex-style'; style.textContent = cssText; document.head.appendChild(style); } } catch (e) { console.error('[ChatShare] loadCSS Error:', e); } resolve(); }); } function downloadFile(content, ext, type, isDataUrl = false) { const a = document.createElement('a'); a.download = `ChatShare_${new Date().toISOString().slice(0, 19).replace(/[T:]/g, '-')}.${ext}`; if (content instanceof Blob) { a.href = URL.createObjectURL(content); } else if (isDataUrl) { a.href = content; } else { a.href = URL.createObjectURL(new Blob([content], { type })); } document.body.appendChild(a); setTimeout(() => { a.click(); setTimeout(() => { if (document.body.contains(a)) document.body.removeChild(a); URL.revokeObjectURL(a.href); }, 1000); }, 0); } function cleanup() { if (isPanelOpen) closePanelAndExit(); forceClearAll(); } window.addEventListener('popstate', cleanup); window.addEventListener('beforeunload', cleanup); document.addEventListener('turbo:before-cache', cleanup); const targetHistory = typeof unsafeWindow !== 'undefined' ? unsafeWindow.history : history; const origPush = targetHistory.pushState; targetHistory.pushState = function (...args) { origPush.apply(this, args); cleanup(); }; window.addEventListener('hashchange', cleanup); // ================= 🚀 后台无感预热引擎 ================= function warmUpHtmlToImage() { if (typeof window.htmlToImage === 'undefined') return; console.log('[ChatShare Extractor] 开始后台静默预热渲染引擎...'); // 创建一个极其微小、不可见的“幽灵”节点 const ghostNode = document.createElement('div'); ghostNode.style.cssText = 'position:fixed; top:-9999px; left:-9999px; width:1px; height:1px; opacity:0; pointer-events:none;'; ghostNode.textContent = ' '; // 赋予空文本，激活字体解析体系 document.body.appendChild(ghostNode); // 强迫 html-to-image 渲染幽灵节点，迫使底层引擎加载所有 CSS 并将其缓存为 Base64 window.htmlToImage.toPixelData(ghostNode, { cacheBust: false, useCORS: true, allowTaint: false, // 屏蔽不需要的重型资源请求，加速预热 filter: (node) => node.tagName ? !['IMG', 'SCRIPT', 'VIDEO', 'IFRAME'].includes(node.tagName.toUpperCase()) : true }).then(() => { console.log('[ChatShare Extractor] 预热完成，字体及样式已全部进入内存缓存！'); }).catch((e) => { // 预热阶段的跨域报错静默吞掉即可，不影响使用 console.log('[ChatShare Extractor] 预热部分结束(含预期内跨域阻断)。'); }).finally(() => { if (document.body.contains(ghostNode)) { document.body.removeChild(ghostNode); } }); } function scheduleWarmUp() { // 先确保公式样式存在，以便被一并预热 loadCSS(); // 充分利用主线程空闲时间，绝不造成页面卡顿 if ('requestIdleCallback' in window) { window.requestIdleCallback(() => { setTimeout(warmUpHtmlToImage, 2000); }, { timeout: 10000 }); } else { setTimeout(warmUpHtmlToImage, 4000); } } // 监控页面路由的初期重构，保证即使单页应用重新加载也能兜底预热 const warmUpObserver = new MutationObserver(() => { if (typeof window.htmlToImage !== 'undefined' && !window._chatshare_warmed) { window._chatshare_warmed = true; scheduleWarmUp(); } }); warmUpObserver.observe(document.head, { childList: true }); // 启动首次预热 scheduleWarmUp(); console.log('[ChatShare Extractor] 挂载成功'); })();