Victor_Jay
c326cbc104
- 将 import 改回 bare specifier，通过 importmap 指向 esm.sh - esm.sh 在同一构建上下文中能识别共享依赖，确保 @codemirror/state 单例 - 消除 "Unrecognized extension value" instanceof 检查错误
577 lines
20 KiB
JavaScript
577 lines
20 KiB
JavaScript
/**
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* MetaLab Markdown Editor — CodeMirror 6 版
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*
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* 依赖通过 importmap 指向 esm.sh，所有 @codemirror/@lezer 共享同一构建树，
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* 避免多实例导致的 "Unrecognized extension value" 错误。
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*/
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import { EditorState } from '@codemirror/state';
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import { EditorView, keymap, lineNumbers, highlightActiveLine, drawSelection } from '@codemirror/view';
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import { defaultKeymap, history, historyKeymap, indentWithTab } from '@codemirror/commands';
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import { markdown, markdownLanguage } from '@codemirror/lang-markdown';
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import { languages } from '@codemirror/language-data';
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import { syntaxHighlighting, defaultHighlightStyle } from '@codemirror/language';
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import { searchKeymap } from '@codemirror/search';
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import { autocompletion } from '@codemirror/autocomplete';
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/* ================================================================
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DOM 引用
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================================================================ */
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const form = document.getElementById('postForm');
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if (!form) throw new Error('postForm not found');
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const postIdEl = document.getElementById('postId');
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const titleEl = document.getElementById('postTitle');
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const bodyEl = document.getElementById('postBody');
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const editorPane = document.getElementById('editorPane');
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const previewPane = document.getElementById('previewPane');
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const previewCont = document.getElementById('previewContent');
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const toolbar = document.getElementById('toolbar');
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const langPicker = document.getElementById('langPicker');
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const langList = document.getElementById('langList');
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const langSearch = document.getElementById('langSearch');
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const imageInput = document.getElementById('imageFileInput');
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const btnToggle = document.getElementById('btnTogglePreview');
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const btnFull = document.getElementById('btnFullscreen');
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const wordCount = document.getElementById('wordCount');
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const lineCount = document.getElementById('lineCount');
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const readTime = document.getElementById('readTime');
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const draftStatus = document.getElementById('draftStatus');
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const isEdit = !!(postIdEl && postIdEl.value);
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let previewVisible = false;
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let syncTimer = null;
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let saveTimer = null;
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let splitTimer = null;
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let langPickerActive = false;
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/* ================================================================
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工具栏动作
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================================================================ */
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const toolActions = {
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bold(view) { wrapSelection(view, '**', '**'); },
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italic(view) { wrapSelection(view, '_', '_'); },
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strikethrough(view) { wrapSelection(view, '~~', '~~'); },
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code(view) { wrapSelection(view, '`', '`'); },
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h1(view) { prefixLines(view, '# '); },
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h2(view) { prefixLines(view, '## '); },
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h3(view) { prefixLines(view, '### '); },
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h4(view) { prefixLines(view, '#### '); },
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link(view) { wrapSelection(view, '[', '](https://)'); },
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quote(view) { prefixLines(view, '> '); },
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ul(view) { prefixLines(view, '- '); },
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ol(view) { prefixLines(view, '1. '); },
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task(view) { prefixLines(view, '- [ ] '); },
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hr(view) { insertBlock(view, '\n---\n'); },
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table(view) { insertTable(view); },
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pre(view) { showLangPicker(view); },
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image(view) { imageInput.click(); },
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};
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function getView() { return editorView; }
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/* ---- 选中文本包裹 ---- */
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function wrapSelection(view, before, after) {
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const sel = view.state.selection.main;
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const text = view.state.sliceDoc(sel.from, sel.to) || (before === '[' ? 'link' : 'text');
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view.dispatch({
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changes: { from: sel.from, to: sel.to, insert: before + text + after },
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selection: { anchor: sel.from + before.length, head: sel.from + before.length + text.length }
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});
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view.focus();
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}
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/* ---- 行首添加前缀 ---- */
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function prefixLines(view, prefix) {
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const sel = view.state.selection.main;
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const doc = view.state.doc;
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const fromLine = doc.lineAt(sel.from);
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const toLine = doc.lineAt(sel.to);
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const changes = [];
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for (let i = fromLine.number; i <= toLine.number; i++) {
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const line = doc.line(i);
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changes.push({ from: line.from, to: line.from, insert: prefix });
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}
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view.dispatch({
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changes,
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selection: { anchor: sel.from + prefix.length, head: sel.to + prefix.length * (toLine.number - fromLine.number + 1) }
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});
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view.focus();
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}
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/* ---- 插入块 ---- */
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function insertBlock(view, text) {
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const sel = view.state.selection.main;
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view.dispatch({
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changes: { from: sel.from, to: sel.to, insert: text },
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selection: { anchor: sel.from + text.length }
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});
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view.focus();
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}
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/* ---- 插入表格 ---- */
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function insertTable(view) {
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const table = '\n| 列1 | 列2 | 列3 |\n| --- | --- | --- |\n| | | |\n';
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const sel = view.state.selection.main;
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view.dispatch({
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changes: { from: sel.from, to: sel.to, insert: table },
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selection: { anchor: sel.from + 3 }
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});
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view.focus();
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}
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/* ================================================================
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代码块语言选择器
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================================================================ */
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const LANGUAGES = [
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'bash', 'c', 'cpp', 'csharp', 'css', 'dockerfile', 'go', 'html',
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'java', 'javascript', 'json', 'kotlin', 'makefile', 'markdown',
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'nginx', 'php', 'python', 'ruby', 'rust', 'scss', 'shell',
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'sql', 'swift', 'toml', 'typescript', 'xml', 'yaml', 'text',
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];
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function showLangPicker(view) {
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if (langPickerActive) { hideLangPicker(); return; }
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langPickerActive = true;
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langList.innerHTML = LANGUAGES.map(l =>
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`<div class="lang-picker-item" data-lang="${l}">${l}</div>`
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).join('');
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langSearch.value = '';
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langPicker.style.display = 'block';
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langList.querySelectorAll('.lang-picker-item').forEach(el => {
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el.addEventListener('click', () => {
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insertCodeBlock(view, el.dataset.lang);
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hideLangPicker();
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});
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});
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langSearch.focus();
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setTimeout(() => document.addEventListener('click', onLangPickerOutside, { once: true }), 0);
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}
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function hideLangPicker() {
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langPicker.style.display = 'none';
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langPickerActive = false;
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document.removeEventListener('click', onLangPickerOutside);
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}
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function onLangPickerOutside(e) {
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if (!langPicker.contains(e.target) && e.target !== document.querySelector('[data-action="pre"]')) {
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hideLangPicker();
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}
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}
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langSearch.addEventListener('input', () => {
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const q = langSearch.value.toLowerCase();
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langList.querySelectorAll('.lang-picker-item').forEach(el => {
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el.style.display = el.dataset.lang.includes(q) ? '' : 'none';
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});
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});
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langSearch.addEventListener('keydown', (e) => {
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if (e.key === 'Enter') {
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const visible = langList.querySelector('.lang-picker-item:not([style*="display: none"])');
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if (visible) {
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insertCodeBlock(getView(), visible.dataset.lang);
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hideLangPicker();
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}
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} else if (e.key === 'Escape') {
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hideLangPicker();
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}
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});
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function insertCodeBlock(view, lang) {
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const sel = view.state.selection.main;
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const text = view.state.sliceDoc(sel.from, sel.to);
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const block = '\n```' + (lang || 'text') + '\n' + (text || '') + '\n```\n';
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view.dispatch({
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changes: { from: sel.from, to: sel.to, insert: block },
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selection: { anchor: sel.from + 4 + lang.length, head: sel.from + 4 + lang.length + text.length }
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});
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view.focus();
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}
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/* ================================================================
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图片上传（含进度反馈）
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================================================================ */
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function getCSRFToken() {
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const meta = document.querySelector('meta[name="csrf-token"]');
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return meta ? meta.getAttribute('content') : '';
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}
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let uploadToastTimer = null;
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function showUploadToast(msg, isError) {
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// 在状态栏中显示上传状态
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if (draftStatus) {
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clearTimeout(uploadToastTimer);
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draftStatus.style.display = '';
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draftStatus.textContent = msg;
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draftStatus.style.color = isError ? '#dc2626' : '#059669';
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uploadToastTimer = setTimeout(() => {
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draftStatus.style.display = 'none';
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draftStatus.style.color = '#059669';
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}, 3000);
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}
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}
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imageInput.addEventListener('change', () => {
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const file = imageInput.files[0];
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if (!file) return;
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uploadImage(file);
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imageInput.value = '';
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});
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function uploadImage(file) {
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const fd = new FormData();
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fd.append('file', file);
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const xhr = new XMLHttpRequest();
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xhr.open('POST', '/api/posts/upload-image');
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xhr.setRequestHeader('X-CSRF-Token', getCSRFToken());
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showUploadToast('上传中...', false);
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xhr.upload.addEventListener('progress', (e) => {
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if (e.lengthComputable) {
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const pct = Math.round(e.loaded / e.total * 100);
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showUploadToast('上传中 ' + pct + '%', false);
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}
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});
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xhr.onload = () => {
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try {
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const d = JSON.parse(xhr.responseText);
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if (d.success && d.data && d.data.url) {
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insertImageMarkdown(d.data.url);
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showUploadToast('上传成功', false);
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} else {
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showUploadToast(d.message || '上传失败', true);
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}
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} catch (_) {
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showUploadToast('上传失败', true);
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}
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};
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xhr.onerror = () => showUploadToast('上传请求失败', true);
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xhr.send(fd);
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}
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function insertImageMarkdown(url) {
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const view = getView();
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const sel = view.state.selection.main;
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const alt = view.state.sliceDoc(sel.from, sel.to) || 'image';
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const md = '';
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view.dispatch({
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changes: { from: sel.from, to: sel.to, insert: md },
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selection: { anchor: sel.from + md.length }
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});
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view.focus();
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}
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/* ================================================================
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Markdown 预览（服务端渲染）
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================================================================ */
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function renderMarkdown(md, callback) {
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fetch('/api/posts/preview', {
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method: 'POST',
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headers: { 'Content-Type': 'application/json', 'X-CSRF-Token': getCSRFToken() },
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body: JSON.stringify({ body: md })
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})
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.then(r => r.json())
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.then(d => callback(d.success ? d.data.html : md))
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.catch(() => callback(md));
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}
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function updatePreview() {
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if (!previewVisible) return;
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const md = getView().state.doc.toString();
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if (!md.trim()) {
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previewCont.innerHTML = '<em style="color:#9ca3af">预览将在此处显示...</em>';
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return;
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}
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clearTimeout(splitTimer);
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splitTimer = setTimeout(() => {
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renderMarkdown(md, html => { previewCont.innerHTML = html; });
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}, 300);
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}
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function togglePreview() {
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previewVisible = !previewVisible;
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previewPane.classList.toggle('visible', previewVisible);
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btnToggle.classList.toggle('active', previewVisible);
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if (previewVisible) updatePreview();
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}
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/* ================================================================
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滚动同步
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================================================================ */
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let scrollSyncing = false;
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function syncScrollToPreview() {
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if (!previewVisible || scrollSyncing) return;
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scrollSyncing = true;
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const scroller = getView().scrollDOM;
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const ratio = scroller.scrollTop / Math.max(1, scroller.scrollHeight - scroller.clientHeight);
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previewCont.scrollTop = ratio * Math.max(1, previewCont.scrollHeight - previewCont.clientHeight);
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requestAnimationFrame(() => { scrollSyncing = false; });
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}
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function syncScrollToEditor() {
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if (!previewVisible || scrollSyncing) return;
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scrollSyncing = true;
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const ratio = previewCont.scrollTop / Math.max(1, previewCont.scrollHeight - previewCont.clientHeight);
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const scroller = getView().scrollDOM;
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scroller.scrollTop = ratio * Math.max(1, scroller.scrollHeight - scroller.clientHeight);
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requestAnimationFrame(() => { scrollSyncing = false; });
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}
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/* ================================================================
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字数统计
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================================================================ */
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function updateStats() {
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const text = getView().state.doc.toString();
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const chars = text.length;
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const lines = text.split('\n').length;
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const words = text.trim() ? text.trim().split(/\s+/).length : 0;
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const minutes = Math.max(1, Math.ceil(words / 200));
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wordCount.textContent = chars + ' 字';
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lineCount.textContent = lines + ' 行';
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readTime.textContent = '约 ' + minutes + ' 分钟';
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}
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/* ================================================================
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自动保存草稿
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================================================================ */
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function saveDraft() {
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const title = titleEl.value.trim();
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const body = getView().state.doc.toString();
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if (!body && !title) return;
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const draft = { title, body, updatedAt: Date.now() };
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localStorage.setItem('mlb_draft_' + (isEdit ? postIdEl.value : 'new'), JSON.stringify(draft));
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draftStatus.style.display = '';
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draftStatus.textContent = '草稿已保存 ' + new Date().toLocaleTimeString();
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if (isEdit && postIdEl.value) {
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silentSave(title, body);
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}
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}
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function silentSave(title, body) {
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fetch('/api/posts/' + postIdEl.value, {
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method: 'PUT',
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headers: { 'Content-Type': 'application/json', 'X-CSRF-Token': getCSRFToken() },
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body: JSON.stringify({ title, body })
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}).catch(() => {});
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}
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function loadDraft() {
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const key = 'mlb_draft_' + (isEdit ? postIdEl.value : 'new');
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const raw = localStorage.getItem(key);
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if (!raw) return;
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try {
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const draft = JSON.parse(raw);
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if (draft.body || draft.title) {
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if (!isEdit || !getView().state.doc.toString()) {
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if (draft.body && confirm('检测到未保存的草稿（' + new Date(draft.updatedAt).toLocaleString() + '），是否恢复？')) {
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getView().dispatch({
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changes: { from: 0, to: getView().state.doc.length, insert: draft.body }
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});
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if (draft.title && !titleEl.value) titleEl.value = draft.title;
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}
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}
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}
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} catch (_) { localStorage.removeItem(key); }
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}
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function clearDraft() {
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const key = 'mlb_draft_' + (isEdit ? postIdEl.value : 'new');
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localStorage.removeItem(key);
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}
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/* ================================================================
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全屏编辑
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================================================================ */
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function toggleFullscreen() {
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document.querySelector('.editor-layout').classList.toggle('fullscreen');
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getView().focus();
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}
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/* ================================================================
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自定义快捷键
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================================================================ */
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const customKeymap = keymap.of([
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{ key: 'Mod-b', run: (v) => { toolActions.bold(v); return true; } },
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{ key: 'Mod-i', run: (v) => { toolActions.italic(v); return true; } },
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{ key: 'Mod-k', run: (v) => { toolActions.link(v); return true; } },
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{ key: 'Mod-Shift-i', run: (v) => { toolActions.image(v); return true; } },
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{ key: 'Mod-`', run: (v) => { toolActions.code(v); return true; } },
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{ key: 'Mod-s', run: () => { saveDraft(); return true; }, preventDefault: true },
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{ key: 'Mod-Shift-p', run: () => { togglePreview(); return true; } },
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{ key: 'F11', run: () => { toggleFullscreen(); return true; }, preventDefault: true },
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]);
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/* ================================================================
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创建 CodeMirror 编辑器
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================================================================ */
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let editorView;
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const extensions = [
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lineNumbers(),
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highlightActiveLine(),
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drawSelection(),
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markdown({
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base: markdownLanguage,
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codeLanguages: languages,
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}),
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syntaxHighlighting(defaultHighlightStyle, { fallback: true }),
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history(),
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autocompletion(),
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indentWithTab,
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keymap.of([...defaultKeymap, ...historyKeymap, ...searchKeymap]),
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customKeymap,
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EditorView.updateListener.of(update => {
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if (update.docChanged) {
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clearTimeout(syncTimer);
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syncTimer = setTimeout(() => {
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updateStats();
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if (previewVisible) updatePreview();
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}, 200);
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clearTimeout(saveTimer);
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saveTimer = setTimeout(saveDraft, 30000);
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}
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}),
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EditorView.domEventHandlers({
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paste: (e, view) => {
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const items = e.clipboardData.items;
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for (const item of items) {
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if (item.type.startsWith('image/')) {
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e.preventDefault();
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uploadImage(item.getAsFile());
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return true;
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}
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}
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return false;
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},
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drop: (e, view) => {
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const files = e.dataTransfer.files;
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if (files.length > 0 && files[0].type.startsWith('image/')) {
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e.preventDefault();
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uploadImage(files[0]);
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return true;
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}
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return false;
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},
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}),
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];
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// 获取初始内容
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const initialBody = bodyEl ? bodyEl.value : '';
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editorView = new EditorView({
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state: EditorState.create({
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doc: initialBody,
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extensions,
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}),
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parent: editorPane,
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});
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// 隐藏原始 textarea
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if (bodyEl) bodyEl.remove();
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/* ================================================================
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事件绑定
|
||
================================================================ */
|
||
// 工具栏点击
|
||
toolbar.addEventListener('click', e => {
|
||
const btn = e.target.closest('.tb-btn');
|
||
if (!btn || btn.dataset.action === 'image' || btn.dataset.action === 'pre') return;
|
||
const action = toolActions[btn.dataset.action];
|
||
if (action) action(editorView);
|
||
});
|
||
|
||
// 预览切换
|
||
btnToggle.addEventListener('click', togglePreview);
|
||
|
||
// 全屏
|
||
btnFull.addEventListener('click', toggleFullscreen);
|
||
|
||
// 滚动同步
|
||
previewCont.addEventListener('scroll', syncScrollToEditor);
|
||
const cmScroller = editorView.scrollDOM;
|
||
cmScroller.addEventListener('scroll', syncScrollToPreview);
|
||
|
||
/* ================================================================
|
||
表单提交
|
||
================================================================ */
|
||
form.addEventListener('submit', e => {
|
||
e.preventDefault();
|
||
|
||
const title = titleEl.value.trim();
|
||
const body = editorView.state.doc.toString().trim();
|
||
|
||
if (!title) { alert('请输入标题'); return; }
|
||
if (!body) { alert('请输入正文'); return; }
|
||
|
||
let url = '/api/posts';
|
||
let method = 'POST';
|
||
if (isEdit && postIdEl.value) {
|
||
url = '/api/posts/' + postIdEl.value;
|
||
method = 'PUT';
|
||
}
|
||
|
||
fetch(url, {
|
||
method,
|
||
headers: { 'Content-Type': 'application/json', 'X-CSRF-Token': getCSRFToken() },
|
||
body: JSON.stringify({ title, body })
|
||
})
|
||
.then(r => r.json())
|
||
.then(data => {
|
||
if (data.success) {
|
||
clearDraft();
|
||
if (data.data && data.data.id) {
|
||
window.location.href = '/posts/' + data.data.id;
|
||
} else {
|
||
window.location.href = '/posts';
|
||
}
|
||
} else {
|
||
alert(data.message || '操作失败');
|
||
}
|
||
})
|
||
.catch(() => alert('请求失败'));
|
||
});
|
||
|
||
/* ================================================================
|
||
键盘事件（ESC 退出全屏）
|
||
================================================================ */
|
||
document.addEventListener('keydown', e => {
|
||
if (e.key === 'Escape') {
|
||
const layout = document.querySelector('.editor-layout');
|
||
if (layout && layout.classList.contains('fullscreen')) {
|
||
layout.classList.remove('fullscreen');
|
||
editorView.focus();
|
||
}
|
||
}
|
||
});
|
||
|
||
/* ================================================================
|
||
初始化
|
||
================================================================ */
|
||
updateStats();
|
||
loadDraft();
|
||
saveTimer = setTimeout(saveDraft, 30000);
|
||
|
||
titleEl.addEventListener('input', () => {
|
||
clearTimeout(saveTimer);
|
||
saveTimer = setTimeout(saveDraft, 30000);
|
||
});
|
||
|
||
console.log('%c📝 MetaLab Markdown Editor (CodeMirror 6) ready', 'color:#6366f1;font-weight:bold');
|