“ydy0615”
2432e78fe1
- Add markdown file upload functionality with upload button - Fix error handling to throw errors instead of silently returning empty strings - Fix memory leak by cleaning up debounceTimer in onUnmounted - Update debounce timing from 150ms to 500ms for stability - Enhance UI with floating action buttons and extensive style refinements - Hide toolbar, menu, and line number elements for cleaner interface
397 lines
9.8 KiB
Markdown
397 lines
9.8 KiB
Markdown
# Milkdown 全屏 WYSIWYG Markdown 编辑器实施方案
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## 项目概述
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基于 `@milkdown/crepe` 实现全屏覆盖的所见即所得 Markdown 编辑器，替换现有的 contenteditable 编辑器。
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## 技术选型
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- **核心编辑器**: `@milkdown/crepe` - 功能完整的 WYSIWYG Markdown 编辑器
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- **Vue 集成**: `@milkdown/vue` - Vue 3 组件支持
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- **主题**: `frame`（简洁框架主题）
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## 系统架构
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```mermaid
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graph TB
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A[App.vue] --> B[MilkdownProvider]
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B --> C[Milkdown Editor - Crepe]
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subgraph "Crepe 核心功能"
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D[WYSWIYG 编辑体验]
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E[Markdown 语法即时渲染]
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F[斜杠命令菜单 Slash Commands]
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G[代码块高亮]
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H[图片粘贴支持]
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end
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subgraph "集成功能"
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I[GhostTextOverlay<br/>建议文本显示]
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J[InlineSuggestionPlugin<br/>智能补全]
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end
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C --> I
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C --> J
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```
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## 实施步骤
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### Step 1: 安装依赖包
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```bash
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npm install @milkdown/crepe @milkdown/vue
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```
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### Step 2: 创建 Milkdown 编辑器组件
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**文件**: `src/components/MilkdownEditor.vue`
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#### 核心实现要点
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```vue
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<template>
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<div class="editor-container" ref="containerRef">
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<button class="export-btn" @click="exportMarkdown">导出文件</button>
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<div ref="root" class="milkdown-editor"></div>
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<!-- 修复：正确的组件标签语法 -->
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<GhostTextOverlay
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v-if="suggestion && cursorRect"
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:suggestion="suggestion"
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:position="cursorRect"
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@accept="acceptSuggestion"
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@dismiss="dismissSuggestion"
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/>
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</div>
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</template>
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<script setup>
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import { onMounted, onUnmounted, ref } from 'vue'
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import { Crepe } from '@milkdown/crepe'
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import GhostTextOverlay from './GhostTextOverlay.vue'
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const root = ref(null)
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const containerRef = ref(null)
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let crepe = null
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const suggestion = ref('')
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const cursorRect = ref(null)
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let debounceTimer = null
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let lastPos = -1
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const API_URL = import.meta.env.VITE_API_URL || 'http://localhost:8000/v1/completions'
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const DEBOUNCE_MS = 500
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onMounted(async () => {
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if (!root.value) return
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crepe = new Crepe({
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root: root.value,
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defaultValue: '# Welcome to LLM in text\n\nStart writing your content here...',
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})
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await crepe.create()
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// 修复：使用更可靠的事件绑定方式
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initEditorEvents()
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})
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// 修复：组件卸载时清理资源
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onUnmounted(() => {
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if (debounceTimer) {
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clearTimeout(debounceTimer)
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}
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if (crepe) {
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crepe.destroy()
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}
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})
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const getCursorPosition = async () => {
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if (!crepe) return null
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try {
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const ctx = crepe.ctx.get()
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const view = ctx.get('view')
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const { from } = view.state.selection
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const coords = view.coordsAtPos(from)
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const containerRect = containerRef.value?.getBoundingClientRect()
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if (!containerRect) return null
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return {
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left: coords.left - containerRect.left,
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top: coords.top - containerRect.top + window.scrollY,
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fontSize: 16,
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fontFamily: 'monospace',
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}
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} catch (e) {
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console.error('getCursorPosition error:', e)
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return null
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}
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}
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const fetchSuggestion = async (prefix, suffix) => {
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try {
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const res = await fetch(API_URL, {
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method: 'POST',
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headers: { 'Content-Type': 'application/json' },
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body: JSON.stringify({ prefix, suffix, languageId: 'markdown' }),
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})
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// 修复：遵循"获取失败直接报错"原则
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if (!res.ok) {
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const errorText = await res.text()
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throw new Error(`API request failed: ${res.status} - ${errorText}`)
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}
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const reader = res.body?.getReader()
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if (!reader) {
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throw new Error('No response body reader available')
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}
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let text = ''
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while (true) {
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const { done, value } = await reader.read()
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if (done) break
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const chunk = new TextDecoder().decode(value)
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const lines = chunk.split('\n').filter(l => l.startsWith('data: '))
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for (const line of lines) {
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try {
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const data = JSON.parse(line.slice(6))
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if (data.content) {
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text += data.content
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}
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if (data.done || data.error) break
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} catch (e) {
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// 忽略 JSON 解析错误，继续处理下一行
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}
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}
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}
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return text
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} catch (e) {
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// 修复：直接抛出错误，不返回空字符串
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throw e
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}
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}
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const onInput = async () => {
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if (!crepe) return
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try {
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const ctx = crepe.ctx.get()
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const view = ctx.get('view')
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const { from } = view.state.selection
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if (from === lastPos) return
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lastPos = from
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const prefix = view.state.doc.textBetween(0, from)
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const suffix = view.state.doc.textBetween(from, view.state.doc.content.size)
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// 修复：使用正确的字符串截取方法
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console.log('Prefix preview:', prefix.slice(-50))
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clearTimeout(debounceTimer)
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debounceTimer = setTimeout(async () => {
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try {
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cursorRect.value = await getCursorPosition()
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suggestion.value = await fetchSuggestion(prefix, suffix)
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} catch (e) {
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console.error('Failed to fetch suggestion:', e)
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suggestion.value = ''
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}
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}, DEBOUNCE_MS)
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} catch (e) {
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console.error('onInput error:', e)
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}
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}
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const handleTab = () => {
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if (suggestion.value) {
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const ctx = crepe.ctx.get()
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const view = ctx.get('view')
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view.dispatch(view.state.tr.insertText(suggestion.value))
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suggestion.value = ''
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}
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}
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const dismissSuggestion = () => {
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suggestion.value = ''
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}
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const acceptSuggestion = () => {
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if (suggestion.value) {
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const ctx = crepe.ctx.get()
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const view = ctx.get('view')
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view.dispatch(view.state.tr.insertText(suggestion.value))
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suggestion.value = ''
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}
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}
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const exportMarkdown = async () => {
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if (!crepe) return
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const markdown = await crepe.getMarkdown()
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const blob = new Blob([markdown], { type: 'text/markdown' })
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const url = URL.createObjectURL(blob)
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const a = document.createElement('a')
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a.href = url
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a.download = `document-${Date.now()}.md`
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a.click()
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URL.revokeObjectURL(url)
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}
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// 修复：使用更可靠的事件绑定方式
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const initEditorEvents = () => {
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if (!crepe) return
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try {
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const ctx = crepe.ctx.get()
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const view = ctx.get('view')
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// 直接在编辑器 DOM 上监听输入事件
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view.dom.addEventListener('input', onInput)
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view.dom.addEventListener('keydown', (e) => {
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if (e.key === 'Tab') {
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handleTab()
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}
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})
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} catch (e) {
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console.error('Failed to bind events:', e)
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}
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}
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</script>
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<style scoped>
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.editor-container {
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position: relative;
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}
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.export-btn {
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position: fixed;
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top: 20px;
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right: 20px;
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padding: 8px 16px;
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background-color: #4a90d9;
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color: white;
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border: none;
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border-radius: 4px;
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cursor: pointer;
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z-index: 1000;
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}
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.export-btn:hover {
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background-color: #3a7bc8;
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}
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.milkdown-editor {
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width: 100vw;
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height: 100vh;
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background-color: #ffffff;
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overflow-y: auto;
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}
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.milkdown-editor::-webkit-scrollbar {
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width: 8px;
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}
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.milkdown-editor::-webkit-scrollbar-track {
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background: transparent;
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}
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.milkdown-editor::-webkit-scrollbar-thumb {
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background-color: #ddd;
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border-radius: 4px;
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}
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.milkdown-editor :deep(.milkdown) {
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max-width: 900px;
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margin: 0 auto !important;
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padding: 20px 40px !important;
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min-height: calc(100vh - 40px);
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}
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.milkdown-editor :deep(*) {
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margin-top: 0 !important;
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margin-bottom: 0 !important;
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padding-top: 0 !important;
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padding-bottom: 0 !important;
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}
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</style>
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```
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### Step 3: 更新 App.vue
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- 移除旧的 `MarkdownEditor` 组件引用
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- 使用新的 `MilkdownEditor` 组件
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- 保持全屏布局（100vh × 100vw）
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### Step 4: 添加样式配置
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在 `main.js` 中导入 Crepe 主题：
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```js
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import '@milkdown/crepe/theme/common/style.css'
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import '@milkdown/crepe/theme/frame.css'
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```
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## 已知问题及修复方案
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### 🔴 严重问题（P0）
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~~1. 模板语法错误~~ ✅ 已修复
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- GhostTextOverlay 组件标签已正确使用尖括号
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~~2. 字符串截取错误~~ ✅ 已修复
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- 代码使用 `slice()` 而非 `substring(-50)`
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~~3. 错误处理违反原则~~ ✅ 已修复
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- 获取失败时会抛出错误而非返回空字符串
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### 🟡 中等问题（P1）
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~~4. 内存泄漏风险~~ ✅ 已修复
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- 组件卸载时已清理 debounceTimer
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~~5. 不可靠的事件绑定~~ ✅ 已修复
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- 使用 500ms 防抖机制
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6. 代码重复
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- fetchSuggestion 逻辑在两个文件中重复
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7. 全局状态污染
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- 插件使用模块级全局变量
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### 🟢 轻微问题（P2）
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8. 大量调试日志影响性能
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9. 缺少完整的类型定义
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10. 没有加载状态指示器
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11. 建议文本无长度限制
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12. API URL 硬编码在前端
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13. 后端缺少 CORS 配置
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## 全屏覆盖样式要点
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- 编辑器容器: `width: 100vw; height: 100vh`
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- 移除默认 padding/margin
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- 纯编辑器模式，无预览面板
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- 自定义滚动条样式
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## 性能优化建议
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1. **防抖优化**: 保持 500ms 防抖，避免频繁请求
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2. **流式响应**: 使用 SSE 流式传输，降低延迟
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3. **上下文截取**: 智能截取上下文（光标前30行 + 后5行）
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4. **内存管理**: 及时清理定时器和事件监听器
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5. **代码精简**: 移除冗余代码和注释
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## 测试要点
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1. 编辑器基本功能测试
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2. 建议功能测试（Tab 接受、Esc 取消、点击接受）
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3. 错误处理测试（网络错误、API 错误）
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4. 性能测试（大量文本输入）
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5. 内存泄漏测试（长时间使用）
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