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655 lines (592 loc) · 24 KB
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<!DOCTYPE html>
<html lang="zh-CN">
<head>
<meta charset="UTF-8">
<title>AI 原力注入 - Mermaid 在线编辑器</title>
<style>
:root {
--bg: #f0f2f5;
--card-bg: #ffffff;
--text: #1a1a2e;
--btn-bg: #2f7d32;
--btn-hover: #256b28;
--btn-preview: #3a57af;
--btn-preview-hover: #2e4694;
--btn-download: #2f7d32;
--btn-download-hover: #256b28;
--border: #e0e0e0;
--shadow: 0 8px 24px rgba(0, 0, 0, 0.08);
--radius: 12px;
}
* {
box-sizing: border-box;
margin: 0;
padding: 0;
}
body {
font-family: 'Segoe UI', 'PingFang SC', 'Microsoft YaHei', sans-serif;
background: var(--bg);
min-height: 100vh;
display: flex;
align-items: center;
justify-content: center;
padding: 20px;
}
.main-container {
display: flex;
flex-wrap: wrap;
gap: 20px;
max-width: 1400px;
width: 100%;
margin: auto;
align-items: stretch;
}
.card {
background: var(--card-bg);
border-radius: var(--radius);
box-shadow: var(--shadow);
padding: 20px;
display: flex;
flex-direction: column;
}
.editor-card {
flex: 1 1 400px;
min-width: 340px;
}
.preview-card {
flex: 2 1 600px;
min-width: 400px;
position: relative;
}
.card-header {
display: flex;
align-items: center;
justify-content: space-between;
margin-bottom: 12px;
}
.card-title {
font-size: 1.1rem;
font-weight: 600;
color: var(--text);
letter-spacing: 0.3px;
}
textarea, #editor {
flex: 1;
width: 100%;
height: calc(100vh - 200px);
min-height: 600px;
border: 1px solid var(--border);
border-radius: 8px;
font-family: 'Fira Code', 'Cascadia Code', 'Consolas', monospace;
font-size: 14px;
line-height: 1.5;
background: #fafafa;
color: #222;
outline: none;
transition: border 0.2s;
}
#editor {
position: relative;
}
textarea:focus {
border-color: #3a57af;
box-shadow: 0 0 0 2px rgba(58,87,175,0.15);
}
.btn-group {
display: flex;
gap: 10px;
flex-wrap: wrap;
}
.btn {
display: inline-flex;
align-items: center;
gap: 6px;
padding: 10px 18px;
font-size: 0.9rem;
font-weight: 600;
border: none;
border-radius: 8px;
cursor: pointer;
letter-spacing: 0.3px;
transition: all 0.2s ease;
white-space: nowrap;
color: #fff;
box-shadow: 0 4px 10px rgba(0, 0, 0, 0.12);
}
.btn:active {
transform: translateY(1px);
}
.btn:disabled {
opacity: 0.5;
cursor: not-allowed;
pointer-events: none;
filter: grayscale(30%);
}
.btn-preview {
background: var(--btn-preview);
}
.btn-preview:hover:not(:disabled) {
background: var(--btn-preview-hover);
box-shadow: 0 6px 16px rgba(58,87,175,0.3);
}
.btn-download {
background: var(--btn-download);
}
.btn-download:hover:not(:disabled) {
background: var(--btn-download-hover);
box-shadow: 0 6px 16px rgba(47,125,50,0.35);
}
.btn-icon {
width: 16px;
height: 16px;
flex-shrink: 0;
stroke: currentColor;
fill: none;
stroke-width: 2.2;
stroke-linecap: round;
stroke-linejoin: round;
}
.preview-area {
flex: 1;
min-height: 300px;
border: 1px solid var(--border);
border-radius: 8px;
padding: 16px;
background: #fdfdfd;
overflow-x: auto;
display: flex;
align-items: center;
justify-content: center;
position: relative;
}
#mermaid-preview {
width: 100%;
display: flex;
align-items: center;
justify-content: center;
min-height: 260px;
}
#mermaid-preview svg {
max-width: 100%;
height: auto;
}
.placeholder {
color: #888;
font-size: 0.95rem;
text-align: center;
padding: 20px;
}
.error-box {
color: #c0392b;
background: #fff5f5;
border: 1px solid #f5c6cb;
padding: 14px;
border-radius: 8px;
font-size: 0.9rem;
max-width: 100%;
word-break: break-word;
font-family: monospace;
white-space: pre-wrap;
}
.fallback {
color: #d6336c;
margin-top: 12px;
font-size: 0.9rem;
text-align: center;
}
.fallback a {
color: #0d6efd;
font-weight: 600;
}
/* Toast */
.toast {
position: fixed;
top: 24px;
left: 50%;
transform: translateX(-50%) translateY(-120px);
background: #1a1a2e;
color: #fff;
padding: 10px 20px;
border-radius: 8px;
font-size: 0.9rem;
font-weight: 500;
z-index: 9999;
pointer-events: none;
transition: transform 0.3s cubic-bezier(0.22, 0.61, 0.36, 1);
box-shadow: 0 8px 20px rgba(0,0,0,0.2);
}
.toast.show {
transform: translateX(-50%) translateY(0);
}
.toast.success {
background: #2f7d32;
}
.toast.error {
background: #c0392b;
}
@media (max-width: 800px) {
.main-container {
flex-direction: column;
}
.editor-card, .preview-card {
flex: 1 1 auto;
min-width: 100%;
}
}
</style>
</head>
<body>
<div class="main-container">
<!-- 编辑器卡片 -->
<div class="card editor-card">
<div class="card-header">
<span class="card-title">✏️ Mermaid 源码</span>
<button id="btn-preview" class="btn btn-preview">
<svg class="btn-icon" viewBox="0 0 24 24">
<path d="M1 12s4-8 11-8 11 8 11 8-4 8-11 8-11-8-11-8z"/>
<circle cx="12" cy="12" r="3"/>
</svg>
预览
</button>
</div>
<div id="editor">flowchart TD
P1["Phase 1<br>愿景 -> PRD"] --> P2["Phase 2<br>PRD -> UI/UX"]
P2 --> P3["Phase 3<br>PRD + UI/UX -> 领域模型"]
P3 --> P4["Phase 4<br>领域模型 -> 规格定义"]
P4 --> P5["Phase 5<br>规格 -> 实现与测试"]
P5 --> P6["Phase 6<br>质量保障与验收"]
P6 --> P7["Phase 7<br>部署与交付"]
P7 --> P8["Phase 8<br>变更与演进"]
P8 -. 反馈回路 .-> P4
P8 -. 反馈回路 .-> P5
classDef existing fill:#dff5e1,stroke:#2f7d32,color:#111;
classDef planned fill:#fff4d6,stroke:#b7791f,color:#111;
class P3,P4,P5,P8 existing;
class P1,P2,P6,P7 planned;</div>
<p class="fallback" id="fallback-msg" style="display:none;">
⚠️ Mermaid 库加载失败，请刷新重试或使用
<a href="https://mermaid.live/" target="_blank" rel="noopener">Mermaid Live Editor</a>
</p>
</div>
<!-- 预览卡片 -->
<div class="card preview-card">
<div class="card-header">
<span class="card-title">📊 预览</span>
<button id="btn-download" class="btn btn-download" disabled title="请先成功预览图表">
<svg class="btn-icon" viewBox="0 0 24 24">
<rect x="3" y="3" width="18" height="18" rx="3" ry="3"/>
<circle cx="8.5" cy="8.5" r="1.5"/>
<polyline points="21 15 16 10 5 21"/>
</svg>
下载 PNG
</button>
</div>
<div class="preview-area">
<div id="mermaid-preview">
<span class="placeholder">点击“预览”按钮查看图表</span>
</div>
</div>
</div>
</div>
<!-- Toast -->
<div class="toast" id="toast"></div>
<!-- Ace Editor -->
<script src="https://cdnjs.cloudflare.com/ajax/libs/ace/1.32.2/ace.js"></script>
<!-- 多 CDN 后备加载 Mermaid -->
<script>
(function() {
// ---------- Ace Editor 初始化 ----------
const editor = ace.edit("editor");
editor.setTheme("ace/theme/chrome");
editor.session.setMode("ace/mode/yaml"); // 使用 yaml 模式以获得一些基础颜色
editor.setOptions({
fontSize: "14px",
showPrintMargin: false,
wrap: true,
useWorker: false
});
// ---------- CDN 加载 ----------
const cdns = [
'https://cdn.jsdelivr.net/npm/mermaid@10/dist/mermaid.min.js',
'https://unpkg.com/mermaid@10/dist/mermaid.min.js',
'https://cdnjs.cloudflare.com/ajax/libs/mermaid/10.9.0/mermaid.min.js',
];
let mermaidLoaded = false;
const fallbackMsg = document.getElementById('fallback-msg');
const previewArea = document.getElementById('mermaid-preview');
const btnPreview = document.getElementById('btn-preview');
const btnDownload = document.getElementById('btn-download');
// 渲染计数器，避免ID冲突
let renderCounter = 0;
function tryLoad(index) {
if (index >= cdns.length) {
fallbackMsg.style.display = 'block';
setButtonsEnabled(false);
return;
}
const script = document.createElement('script');
script.src = cdns[index];
script.onload = () => {
if (!mermaidLoaded) {
mermaidLoaded = true;
initMermaid();
}
};
script.onerror = () => tryLoad(index + 1);
document.head.appendChild(script);
}
function initMermaid() {
if (typeof mermaid === 'undefined') {
fallbackMsg.style.display = 'block';
return;
}
mermaid.initialize({
startOnLoad: false, // 手动控制渲染
theme: 'default',
securityLevel: 'loose',
flowchart: { useMaxWidth: true, htmlLabels: true, curve: 'basis' },
});
setButtonsEnabled(true);
// 自动预览默认内容
doPreview();
}
function setButtonsEnabled(ready) {
// 预览按钮始终可用，但如果Mermaid未加载则禁用
if (btnPreview) {
btnPreview.disabled = !ready;
}
if (btnDownload) {
btnDownload.disabled = true; // 下载按钮初始禁用，预览成功后启用
}
}
// ---------- Toast ----------
let toastTimer = null;
function showToast(msg, type = '') {
const toast = document.getElementById('toast');
if (toastTimer) clearTimeout(toastTimer);
toast.textContent = msg;
toast.className = 'toast ' + type + ' show';
toastTimer = setTimeout(() => toast.classList.remove('show'), 2500);
}
// ---------- 渲染逻辑 ----------
async function renderMermaidCode(code) {
if (!code || code.trim() === '') {
throw new Error('请输入 Mermaid 代码');
}
// 每次使用唯一ID
renderCounter += 1;
const id = `mermaid-svg-${Date.now()}-${renderCounter}`;
const result = await mermaid.render(id, code.trim());
return result.svg;
}
async function doPreview() {
const code = editor.getValue();
if (!mermaidLoaded) {
showToast('⚠️ Mermaid 库尚未加载，请稍后', 'error');
return;
}
// 设置加载状态
btnPreview.disabled = true;
btnDownload.disabled = true;
previewArea.innerHTML = '<span class="placeholder">⏳ 正在渲染图表...</span>';
try {
const svgString = await renderMermaidCode(code);
previewArea.innerHTML = svgString;
// 确保SVG占满宽度
const svgEl = previewArea.querySelector('svg');
if (svgEl) {
svgEl.style.maxWidth = '100%';
svgEl.style.height = 'auto';
}
btnDownload.disabled = false;
showToast('✅ 渲染成功', 'success');
} catch (err) {
console.error('渲染失败:', err);
const errorMsg = err.message || '未知错误';
previewArea.innerHTML = `<div class="error-box">❌ 渲染失败：${escapeHtml(errorMsg)}</div>`;
btnDownload.disabled = true;
showToast('❌ 渲染失败，请检查代码', 'error');
} finally {
btnPreview.disabled = false;
}
}
function escapeHtml(text) {
const div = document.createElement('div');
div.textContent = text;
return div.innerHTML;
}
// ---------- 下载 PNG（复用优化后的导出逻辑） ----------
function replaceForeignObjectsWithText(svgElement) {
const clonedSvg = svgElement.cloneNode(true);
const foreignObjects = clonedSvg.querySelectorAll('foreignObject');
foreignObjects.forEach((fo) => {
const div = fo.querySelector('div');
let rawText = '';
if (div) {
rawText = extractTextFromDiv(div);
} else {
rawText = (fo.textContent || '').trim();
}
if (!rawText) {
fo.remove();
return;
}
const textEl = document.createElementNS('http://www.w3.org/2000/svg', 'text');
const foX = parseFloat(fo.getAttribute('x')) || 0;
const foY = parseFloat(fo.getAttribute('y')) || 0;
const foW = parseFloat(fo.getAttribute('width')) || 100;
const foH = parseFloat(fo.getAttribute('height')) || 40;
// 尝试读取样式
let textAnchor = 'middle';
let anchorX = foX + foW / 2;
if (div) {
const style = div.getAttribute('style') || '';
const textAlign = extractStyleValue(style, 'text-align');
if (textAlign === 'left' || textAlign === 'start') {
textAnchor = 'start';
anchorX = foX + 4;
} else if (textAlign === 'right' || textAlign === 'end') {
textAnchor = 'end';
anchorX = foX + foW - 4;
}
}
const lines = rawText.split('\n').filter(l => l.trim().length > 0);
const fontSize = div ? (extractStyleValue(div.getAttribute('style') || '', 'font-size') || '14px') : '14px';
const fontFamily = div ? (extractStyleValue(div.getAttribute('style') || '', 'font-family') || 'sans-serif') : 'sans-serif';
const color = div ? (extractStyleValue(div.getAttribute('style') || '', 'color') || '#333') : '#333';
textEl.setAttribute('x', anchorX);
textEl.setAttribute('fill', color);
textEl.setAttribute('font-family', fontFamily);
textEl.setAttribute('font-size', fontSize);
textEl.setAttribute('text-anchor', textAnchor);
if (lines.length === 1) {
textEl.setAttribute('y', foY + foH / 2);
textEl.setAttribute('dominant-baseline', 'central');
textEl.textContent = lines[0];
} else {
const fsNum = parseFloat(fontSize) || 14;
const lineHeight = fsNum * 1.35;
const totalHeight = lines.length * lineHeight;
const startY = foY + foH / 2 - totalHeight / 2 + lineHeight * 0.8;
textEl.setAttribute('y', startY);
lines.forEach((line, i) => {
const tspan = document.createElementNS('http://www.w3.org/2000/svg', 'tspan');
tspan.setAttribute('x', anchorX);
if (i > 0) tspan.setAttribute('dy', lineHeight);
tspan.textContent = line;
textEl.appendChild(tspan);
});
}
fo.parentNode.replaceChild(textEl, fo);
});
// 移除残留的 foreignObject
clonedSvg.querySelectorAll('foreignObject').forEach(fo => fo.remove());
return clonedSvg;
}
function extractTextFromDiv(div) {
const html = div.innerHTML || '';
const text = html
.replace(/<br\s*\/?>/gi, '\n')
.replace(/ /gi, ' ')
.replace(/<[^>]*>/g, '');
const txt = document.createElement('textarea');
txt.innerHTML = text;
return txt.value.trim();
}
function extractStyleValue(styleString, property) {
if (!styleString) return null;
const regex = new RegExp(property.replace(/-/g, '\\-') + '\\s*:\\s*([^;]+)', 'i');
const match = styleString.match(regex);
return match ? match[1].trim() : null;
}
function getSVGDimensions(svgElement) {
const viewBox = svgElement.getAttribute('viewBox');
if (viewBox) {
const parts = viewBox.trim().split(/\s+/);
if (parts.length >= 4) return { width: parseFloat(parts[2]), height: parseFloat(parts[3]) };
}
let w = parseFloat(svgElement.getAttribute('width'));
let h = parseFloat(svgElement.getAttribute('height'));
if (!isNaN(w) && !isNaN(h) && w > 0 && h > 0) return { width: w, height: h };
const rect = svgElement.getBoundingClientRect();
if (rect.width > 0 && rect.height > 0) return { width: rect.width, height: rect.height };
return { width: 800, height: 600 };
}
function serializeSVG(svgElement) {
let svgString = new XMLSerializer().serializeToString(svgElement);
if (!svgString.includes('xmlns="http://www.w3.org/2000/svg"')) {
svgString = svgString.replace('<svg ', '<svg xmlns="http://www.w3.org/2000/svg" ');
}
if (!svgString.includes('xmlns:xlink')) {
svgString = svgString.replace('<svg ', '<svg xmlns:xlink="http://www.w3.org/1999/xlink" ');
}
return svgString;
}
async function exportToPNG() {
const svgElement = previewArea.querySelector('svg');
if (!svgElement) {
showToast('⚠️ 没有可导出的图表', 'error');
return;
}
btnDownload.disabled = true;
const originalText = btnDownload.textContent;
btnDownload.textContent = '⏳ 导出中...';
try {
const processedSvg = replaceForeignObjectsWithText(svgElement);
const dims = getSVGDimensions(svgElement);
const scale = Math.min(window.devicePixelRatio || 2, 3);
const canvasWidth = Math.ceil(dims.width * scale);
const canvasHeight = Math.ceil(dims.height * scale);
const svgString = serializeSVG(processedSvg);
const blob = new Blob([svgString], { type: 'image/svg+xml;charset=utf-8' });
const url = URL.createObjectURL(blob);
const img = new Image();
img.width = canvasWidth;
img.height = canvasHeight;
await new Promise((resolve, reject) => {
img.onload = resolve;
img.onerror = () => reject(new Error('SVG 图片加载失败'));
img.src = url;
setTimeout(() => reject(new Error('SVG 加载超时')), 12000);
});
const canvas = document.createElement('canvas');
canvas.width = canvasWidth;
canvas.height = canvasHeight;
const ctx = canvas.getContext('2d');
ctx.fillStyle = '#ffffff';
ctx.fillRect(0, 0, canvasWidth, canvasHeight);
ctx.scale(scale, scale);
ctx.drawImage(img, 0, 0, dims.width, dims.height);
URL.revokeObjectURL(url);
const link = document.createElement('a');
link.href = canvas.toDataURL('image/png', 1.0);
link.download = 'mermaid-图表.png';
document.body.appendChild(link);
link.click();
document.body.removeChild(link);
showToast('✅ PNG 下载成功', 'success');
} catch (err) {
console.error('导出失败:', err);
showToast('❌ 导出失败: ' + (err.message || '未知错误'), 'error');
} finally {
btnDownload.disabled = false;
btnDownload.textContent = originalText;
}
}
// ---------- 事件绑定 ----------
btnPreview.addEventListener('click', doPreview);
btnDownload.addEventListener('click', exportToPNG);
// 可选：Ctrl+Enter 快捷键预览
editor.commands.addCommand({
name: 'preview',
bindKey: {win: 'Ctrl-Enter', mac: 'Command-Enter'},
exec: function(editor) {
doPreview();
}
});
// 启动加载
tryLoad(0);
})();
</script>
</body>
</html>