Metona
1e3f4d4ba5
根本原因：所有CSS选择器方案都依赖DOM位置关系， 而 appendSystemMessage 在 placeholder 之后插入 div 会破坏这种关系。 解决方案：用模块变量 currentPlaceholder 直接持有 placeholder DOM 引用， updateLastAssistantMessage 直接读取该引用，完全不依赖选择器。 - appendAssistantPlaceholder: 设置 currentPlaceholder = div - updateLastAssistantMessage: 使用 currentPlaceholder，首次调用移除 loading - clearMessages: 清除 currentPlaceholder
395 lines
15 KiB
JavaScript
395 lines
15 KiB
JavaScript
/**
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* ChatArea - 聊天区域组件
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* 负责消息渲染、流式更新、导出功能
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*/
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import { state, KEYS } from '../state.js';
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import { marked } from '../marked-config.js';
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import { escapeHtml, formatTime, downloadFile } from '../utils.js';
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/** 根据文件名返回合适的图标 */
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function getFileIcon(filename) {
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const name = filename.toLowerCase();
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if (name === 'dockerfile') return '🐳';
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if (name === 'makefile' || name === 'gnumakefile') return '🔨';
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const ext = filename.split('.').pop().toLowerCase();
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const map = {
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py: '🐍', pyw: '🐍', pyi: '🐍',
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js: '💛', mjs: '💛', cjs: '💛',
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ts: '🔷', tsx: '⚛️', jsx: '⚛️',
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java: '☕', go: '🐹', rs: '🦀', rb: '💎',
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php: '🐘', swift: '🍎', kt: '🤖', scala: '🔴',
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lua: '🌙', pl: '🐪', r: '📐', m: '📐',
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cs: '🟪', fs: '🔵', vb: '🔷',
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ex: '💧', exs: '💧', erl: '📞', hs: '🟣',
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clj: '🟢', lisp: '🟢',
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cpp: '⚙️', cc: '⚙️', cxx: '⚙️', hpp: '⚙️',
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c: '⚙️', h: '⚙️',
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sh: '🐚', bash: '🐚', zsh: '🐚', fish: '🐚',
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html: '🌐', htm: '🌐', css: '🎨', svg: '🎨',
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json: '📋', yaml: '📋', yml: '📋', toml: '📋',
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ini: '📋', cfg: '📋', conf: '📋',
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xml: '📰', sql: '🗃️',
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md: '📝', markdown: '📝', rst: '📝', txt: '📄',
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log: '📜', csv: '📊', tsv: '📊',
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diff: '🔀', patch: '🔀',
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};
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return map[ext] || '📄';
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}
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let chatAreaEl, messagesContainerEl, emptyStateEl, scrollBtnEl;
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let autoScroll = true; // 是否自动滚动到底部
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let currentPlaceholder = null; // 当前流式消息的 placeholder 引用
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export function initChatArea() {
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chatAreaEl = document.querySelector('#chatArea');
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messagesContainerEl = document.querySelector('#messagesContainer');
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emptyStateEl = document.querySelector('#emptyState');
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scrollBtnEl = document.querySelector('#scrollToBottom');
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// 监听用户手动滚动
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chatAreaEl.addEventListener('scroll', () => {
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const atBottom = isAtBottom();
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if (atBottom) {
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autoScroll = true;
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scrollBtnEl.style.display = 'none';
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} else {
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autoScroll = false;
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scrollBtnEl.style.display = '';
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}
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});
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// 点击滚动到底部按钮
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scrollBtnEl.addEventListener('click', () => {
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autoScroll = true;
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scrollBtnEl.style.display = 'none';
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chatAreaEl.scrollTo({ top: chatAreaEl.scrollHeight, behavior: 'smooth' });
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});
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}
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/** 判断是否在底部附近（60px 容差） */
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function isAtBottom() {
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return chatAreaEl.scrollHeight - chatAreaEl.scrollTop - chatAreaEl.clientHeight < 60;
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}
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/** 安全地将 Markdown 转为 HTML */
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export function safeMarkdown(text) {
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if (!text && text !== 0) return '';
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const str = typeof text === 'string' ? text : String(text);
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if (!str) return '';
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try {
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const result = marked.parse(str);
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return typeof result === 'string' ? result : escapeHtml(str);
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} catch (e) {
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return escapeHtml(str);
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}
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}
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/** 滚动到底部（仅当 autoScroll 开启时） */
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export function scrollToBottom() {
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if (!autoScroll) return;
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requestAnimationFrame(() => {
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chatAreaEl.scrollTop = chatAreaEl.scrollHeight;
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});
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}
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/** 渲染所有消息（增量渲染） */
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export function renderMessages() {
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const currentSession = state.get(KEYS.CURRENT_SESSION);
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const msgs = currentSession ? currentSession.messages : [];
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if (msgs.length === 0) {
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emptyStateEl.style.display = '';
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messagesContainerEl.style.display = 'none';
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return;
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}
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emptyStateEl.style.display = 'none';
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messagesContainerEl.style.display = '';
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const existingCount = messagesContainerEl.children.length;
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const isNewMessage = existingCount > 0 && existingCount < msgs.length;
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for (let i = existingCount; i < msgs.length; i++) {
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appendMessageDOM(msgs[i], i);
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}
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// 新消息按 autoScroll 决定；首次渲染（加载历史）强制滚到底部
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if (isNewMessage) {
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scrollToBottom();
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} else if (msgs.length > 0) {
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chatAreaEl.scrollTop = chatAreaEl.scrollHeight;
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}
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}
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/** 追加单条消息 DOM */
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export function appendMessageDOM(msg, index) {
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const div = document.createElement('div');
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div.className = `message ${msg.role}`;
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div.dataset.index = index;
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const avatar = msg.role === 'user' ? '👤' : '🤖';
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const roleLabel = msg.role === 'user' ? '你' : 'AI';
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const modelTag = (msg.role === 'assistant' && msg.model)
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? `<span class="model-tag">${escapeHtml(msg.model)}</span>`
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: '';
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let contentHtml = '';
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const safeContent = (msg.content != null) ? String(msg.content) : '';
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if (msg.role === 'assistant') {
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// 思考块
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if (msg.think) {
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contentHtml += `
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<div class="think-block">
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<div class="think-header" onclick="this.nextElementSibling.style.display = this.nextElementSibling.style.display === 'none' ? '' : 'none'; this.querySelector('.chevron').classList.toggle('expanded');">
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<span>🤔 思考过程</span>
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<svg class="chevron expanded" width="16" height="16" viewBox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="2"><polyline points="6 9 12 15 18 9"/></svg>
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</div>
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<div class="think-content">
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<pre>${escapeHtml(msg.think)}</pre>
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</div>
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</div>`;
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}
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if (safeContent) {
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contentHtml += `<div class="msg-content">${safeMarkdown(safeContent)}</div>`;
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} else {
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contentHtml += `<div class="msg-content"></div>`;
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}
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} else {
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contentHtml += `<div class="msg-content">${escapeHtml(safeContent)}</div>`;
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}
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// 图片
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if (msg.images && msg.images.length > 0) {
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contentHtml += '<div class="msg-images">';
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for (const img of msg.images) {
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contentHtml += `<img class="msg-img" src="data:image/png;base64,${img}" alt="用户图片" data-lightbox="true">`;
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}
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contentHtml += '</div>';
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}
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// 文件 chip（展示用，不暴露文件内容）
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if (msg.files && msg.files.length > 0) {
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contentHtml += '<div class="msg-files">';
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for (const f of msg.files) {
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const icon = getFileIcon(f.name);
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contentHtml += `<div class="file-chip"><span class="file-icon">${icon}</span><span class="file-name">${escapeHtml(f.name)}</span></div>`;
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}
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contentHtml += '</div>';
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}
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// 纯图片/文件消息隐藏空内容
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if (msg.role === 'user' && (!msg.content || msg.content.trim() === '') && (msg.images?.length > 0 || msg.files?.length > 0)) {
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contentHtml = contentHtml.replace('<div class="msg-content"></div>', '');
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} else if (msg.role === 'user' && msg.files?.length > 0 && msg.content) {
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// 有文本也有文件，保留文本内容展示
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}
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// 统计信息
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const stats = [];
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if (msg.timestamp) stats.push(formatTime(msg.timestamp));
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if (msg.eval_count) stats.push(`${msg.eval_count} tokens`);
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if (msg.total_duration) stats.push(`${(msg.total_duration / 1e9).toFixed(1)}s`);
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if (stats.length > 0) {
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contentHtml += `<div class="msg-stats">${stats.map(s => `<span>${s}</span>`).join(' · ')}</div>`;
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}
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// RAG 知识库来源
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if (msg.role === 'assistant' && msg.ragSources && msg.ragSources.length > 0) {
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const sourcesHtml = msg.ragSources.map((s, i) => {
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const scorePercent = s.score ? `${(s.score * 100).toFixed(0)}%` : '';
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return `<div class="rag-source-item">
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<span class="rag-source-name">📄 来源 ${i + 1}: ${escapeHtml(s.filename)}</span>
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${scorePercent ? `<span class="rag-source-score">${scorePercent}</span>` : ''}
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</div>`;
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}).join('');
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contentHtml += `<div class="rag-sources">
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<div class="rag-sources-header">🧠 基于知识库回答</div>
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${sourcesHtml}
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</div>`;
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}
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div.innerHTML = `
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<div class="msg-avatar">${avatar}</div>
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<div class="msg-body">
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<div class="msg-role">${roleLabel}${modelTag}</div>
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${contentHtml}
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</div>
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`;
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messagesContainerEl.appendChild(div);
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}
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/** 更新最后一条 assistant 消息（流式输出） */
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export function updateLastAssistantMessage(content, think, stats, model) {
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// 使用 placeholder 引用，完全不依赖 CSS 选择器
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const lastMsg = currentPlaceholder;
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if (!lastMsg) return;
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// 仅首次调用时移除 loading 指示器
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if (lastMsg.classList.contains('loading')) {
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lastMsg.classList.remove('loading');
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const loadingDots = lastMsg.querySelector('.loading-dots');
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const loadingText = lastMsg.querySelector('.loading-text');
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if (loadingDots) loadingDots.remove();
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if (loadingText) loadingText.remove();
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}
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if (model) {
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let modelTag = lastMsg.querySelector('.model-tag');
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if (!modelTag) {
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modelTag = document.createElement('span');
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modelTag.className = 'model-tag';
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const roleEl = lastMsg.querySelector('.msg-role');
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if (roleEl) roleEl.appendChild(modelTag);
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}
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modelTag.textContent = model;
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}
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const contentDiv = lastMsg.querySelector('.msg-content');
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const safeContent = (content != null) ? String(content) : '';
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if (contentDiv && safeContent) {
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contentDiv.innerHTML = safeMarkdown(safeContent);
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}
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// 思考块
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let thinkBlock = lastMsg.querySelector('.think-block');
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if (think) {
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if (!thinkBlock) {
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const msgBody = lastMsg.querySelector('.msg-body');
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thinkBlock = document.createElement('div');
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thinkBlock.className = 'think-block';
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thinkBlock.innerHTML = `
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<div class="think-header" onclick="this.nextElementSibling.style.display = this.nextElementSibling.style.display === 'none' ? '' : 'none'; this.querySelector('.chevron').classList.toggle('expanded');">
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<span>🤔 思考过程</span>
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<svg class="chevron expanded" width="16" height="16" viewBox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="2"><polyline points="6 9 12 15 18 9"/></svg>
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</div>
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<div class="think-content"><pre></pre></div>
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`;
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msgBody.insertBefore(thinkBlock, contentDiv);
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}
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thinkBlock.querySelector('pre').textContent = think;
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}
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if (stats) {
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let statsDiv = lastMsg.querySelector('.msg-stats');
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if (!statsDiv) {
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statsDiv = document.createElement('div');
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statsDiv.className = 'msg-stats';
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lastMsg.querySelector('.msg-body').appendChild(statsDiv);
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}
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const parts = [];
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if (stats.eval_count) parts.push(`${stats.eval_count} tokens`);
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if (stats.total_duration) parts.push(`${(stats.total_duration / 1e9).toFixed(1)}s`);
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if (parts.length) statsDiv.innerHTML = parts.join(' · ');
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}
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scrollToBottom();
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}
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/** 追加临时的 assistant 消息占位 */
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export function appendAssistantPlaceholder() {
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const div = document.createElement('div');
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div.className = 'message assistant loading';
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div.innerHTML = `
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<div class="msg-avatar">🤖</div>
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<div class="msg-body">
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<div class="msg-role">AI</div>
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<div class="msg-content">
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<div class="loading-dots">
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<span></span><span></span><span></span>
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</div>
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<span class="loading-text">正在思考...</span>
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</div>
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</div>
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`;
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messagesContainerEl.appendChild(div);
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currentPlaceholder = div;
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scrollToBottom();
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}
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/** 追加系统提示消息 */
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export function appendSystemMessage(text) {
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const div = document.createElement('div');
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div.style.cssText = 'text-align:center;padding:8px;font-size:12px;color:var(--text-muted);';
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div.textContent = text;
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emptyStateEl.style.display = 'none';
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messagesContainerEl.style.display = '';
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messagesContainerEl.appendChild(div);
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scrollToBottom();
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}
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/** 获取消息容器 */
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export function getMessagesContainer() {
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return messagesContainerEl;
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}
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/** 清空消息 DOM */
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export function clearMessages() {
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messagesContainerEl.innerHTML = '';
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currentPlaceholder = null;
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}
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/** 重置自动滚动（用户发送消息、新建会话时调用） */
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export function enableAutoScroll() {
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autoScroll = true;
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if (scrollBtnEl) scrollBtnEl.style.display = 'none';
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}
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// ── 导出功能 ──
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/** 导出为 Markdown */
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export function exportAsMarkdown(session) {
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let md = `# ${session.title}\n\n`;
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md += `**模型:** ${session.model} \n`;
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md += `**时间:** ${formatTime(session.createdAt)}\n\n---\n\n`;
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session.messages.forEach(m => {
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const role = m.role === 'user' ? '👤 用户' : '🤖 AI';
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md += `### ${role}\n\n${m.content || ''}\n\n`;
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if (m.files && m.files.length > 0) {
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md += m.files.map(f => `📎 \`${f.name}\``).join(' · ') + '\n\n';
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}
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if (m.think) md += `> **思考:** ${m.think}\n\n`;
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});
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downloadFile(`${session.title}.md`, md, 'text/markdown');
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}
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/** 导出为 HTML */
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export function exportAsHtml(session) {
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let html = `<!DOCTYPE html><html><head><meta charset="UTF-8"><title>${escapeHtml(session.title)}</title>
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<style>body{max-width:800px;margin:0 auto;padding:20px;font-family:system-ui;line-height:1.6;background:#0a0a1a;color:#e8e8f0;}
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.user{background:rgba(25,25,60,0.5);padding:12px;border-radius:8px;margin:8px 0;}
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.assistant{background:rgba(0,245,212,0.03);padding:12px;border-radius:8px;margin:8px 0;border:1px solid rgba(0,245,212,0.08);}
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h1{background:linear-gradient(135deg,#00f5d4,#7b2ff7);-webkit-background-clip:text;-webkit-text-fill-color:transparent;}
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pre{background:rgba(0,0,0,0.3);padding:12px;border-radius:8px;overflow-x:auto;}
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code{background:rgba(0,0,0,0.2);padding:2px 6px;border-radius:4px;}</style></head><body>
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<h1>${escapeHtml(session.title)}</h1><p>${formatTime(session.createdAt)} · ${session.model}</p><hr>`;
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session.messages.forEach(m => {
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const fileChips = (m.files && m.files.length > 0)
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? '<br>' + m.files.map(f => `<span style="background:rgba(123,47,247,0.15);padding:2px 8px;border-radius:4px;font-size:12px;margin:2px;display:inline-block;">📎 ${escapeHtml(f.name)}</span>`).join(' ')
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: '';
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html += `<div class="${m.role}"><strong>${m.role === 'user' ? '👤 用户' : '🤖 AI'}</strong>${fileChips}<br>${(m.content || '').replace(/\n/g, '<br>')}</div>`;
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});
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html += '</body></html>';
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downloadFile(`${session.title}.html`, html, 'text/html');
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}
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/** 导出为 TXT */
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export function exportAsTxt(session) {
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let txt = `${session.title}\n模型: ${session.model}\n时间: ${formatTime(session.createdAt)}\n${'='.repeat(50)}\n\n`;
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session.messages.forEach(m => {
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txt += `[${m.role === 'user' ? '用户' : 'AI'}]\n`;
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if (m.files && m.files.length > 0) {
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txt += m.files.map(f => `📎 ${f.name}`).join(' · ') + '\n';
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}
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txt += `${m.content || ''}\n\n`;
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});
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downloadFile(`${session.title}.txt`, txt, 'text/plain');
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}
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