feat: 实现 Mermaid 代码块魔改支持
- 添加 convertMermaidCodeblocks() 函数,在代码高亮前拦截 mermaid 代码块 - 支持标准 Markdown 代码块 (\\\mermaid) 渲染 - 更新 detectMermaidBlocks() 添加 mermaid-from-codeblock 选择器 - 更新 extractMermaidCode() 支持新容器类型 - 创建测试文件 test-codeblock-magic.html - 更新用户文档、开发者文档和 FAQ - 完全绕过代码高亮和 WordPress 格式化 - 支持 PJAX 页面切换 - 特殊字符和换行符正确保留
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tests/test-codeblock-magic.html
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295
tests/test-codeblock-magic.html
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<!DOCTYPE html>
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<html lang="zh-CN">
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<head>
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<meta charset="UTF-8">
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<meta name="viewport" content="width=device-width, initial-scale=1.0">
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<title>Mermaid 代码块魔改测试</title>
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<style>
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body {
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font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
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max-width: 1200px;
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margin: 0 auto;
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padding: 20px;
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background: #f5f5f5;
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}
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.test-case {
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background: white;
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padding: 20px;
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margin-bottom: 20px;
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border-radius: 8px;
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box-shadow: 0 2px 4px rgba(0,0,0,0.1);
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}
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.test-case h3 {
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margin-top: 0;
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color: #333;
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border-bottom: 2px solid #007bff;
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padding-bottom: 10px;
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}
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.test-case .description {
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color: #666;
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margin-bottom: 15px;
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font-size: 14px;
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}
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.mermaid-from-codeblock {
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background: #f8f9fa;
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padding: 15px;
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border-radius: 4px;
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border: 1px solid #dee2e6;
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}
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pre {
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background: #f8f9fa;
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padding: 15px;
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border-radius: 4px;
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border: 1px solid #dee2e6;
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overflow-x: auto;
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}
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code {
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font-family: 'Courier New', Courier, monospace;
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}
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</style>
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<!-- Mermaid 库 -->
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<script src="https://cdn.jsdelivr.net/npm/mermaid@10/dist/mermaid.min.js"></script>
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</head>
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<body>
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<h1>Mermaid 代码块魔改测试</h1>
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<p>本页面用于测试标准 Markdown 代码块 (<code>```mermaid</code>) 的 Mermaid 图表渲染功能。</p>
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<!-- 测试用例 1:标准格式 -->
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<div class="test-case">
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<h3>测试用例 1:标准 Markdown 格式</h3>
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<div class="description">
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格式:<code><pre><code class="language-mermaid"></code>
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</div>
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<pre><code class="language-mermaid">
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flowchart TD
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A[开始] --> B{判断}
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B -->|是| C[执行操作]
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B -->|否| D[跳过]
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C --> E[结束]
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D --> E
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</code></pre>
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</div>
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<!-- 测试用例 2:多个代码块 -->
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<div class="test-case">
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<h3>测试用例 2:多个代码块(批量处理)</h3>
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<div class="description">
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测试同一页面中多个 Mermaid 代码块的处理
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</div>
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<pre><code class="language-mermaid">
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graph LR
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A[客户端] --> B[服务器]
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B --> C[数据库]
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C --> B
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B --> A
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</code></pre>
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<br>
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<pre><code class="language-mermaid">
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sequenceDiagram
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participant 用户
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participant 系统
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用户->>系统: 发送请求
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系统->>用户: 返回响应
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</code></pre>
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</div>
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<!-- 测试用例 3:特殊字符 -->
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<div class="test-case">
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<h3>测试用例 3:特殊字符保留</h3>
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<div class="description">
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测试箭头符号 <code>--></code>、双横线 <code>--</code>、等号 <code>==</code> 等特殊字符是否正确保留
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</div>
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<pre><code class="language-mermaid">
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flowchart TD
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A --> B
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B -- 文本 --> C
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C ==> D
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D -.-> E
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E ~~~ F
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</code></pre>
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</div>
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<!-- 测试用例 4:空代码块 -->
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<div class="test-case">
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<h3>测试用例 4:空代码块(边界情况)</h3>
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<div class="description">
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测试空代码块是否会导致错误
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</div>
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<pre><code class="language-mermaid"></code></pre>
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<p style="color: #666; font-size: 14px;">空代码块应该被跳过,不会创建容器</p>
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</div>
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<!-- 测试用例 5:多行代码块 -->
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<div class="test-case">
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<h3>测试用例 5:多行代码块(换行符保留)</h3>
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<div class="description">
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测试多行代码块中的换行符是否正确保留
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</div>
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<pre><code class="language-mermaid">
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graph TB
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subgraph 子图1
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A1[节点A1]
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A2[节点A2]
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end
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subgraph 子图2
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B1[节点B1]
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B2[节点B2]
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end
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A1 --> B1
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A2 --> B2
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</code></pre>
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</div>
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<!-- 测试用例 6:简化格式 -->
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<div class="test-case">
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<h3>测试用例 6:简化格式</h3>
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<div class="description">
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格式:<code><pre><code class="mermaid"></code>
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</div>
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<pre><code class="mermaid">
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pie title 数据分布
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"类别A" : 45
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"类别B" : 30
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"类别C" : 25
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</code></pre>
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</div>
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<!-- 测试用例 7:无 pre 包裹 -->
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<div class="test-case">
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<h3>测试用例 7:无 pre 包裹</h3>
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<div class="description">
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格式:<code><code class="language-mermaid"></code>(无 pre 标签)
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</div>
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<code class="language-mermaid">
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flowchart LR
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Start --> Stop
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</code>
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</div>
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<!-- 测试用例 8:自定义属性格式 -->
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<div class="test-case">
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<h3>测试用例 8:自定义属性格式</h3>
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<div class="description">
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格式:<code><pre data-lang="mermaid"></code>
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</div>
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<pre data-lang="mermaid">
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stateDiagram-v2
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[*] --> 状态1
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状态1 --> 状态2
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状态2 --> [*]
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</pre>
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</div>
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<!-- 测试用例 9:复杂图表 -->
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<div class="test-case">
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<h3>测试用例 9:复杂图表</h3>
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<div class="description">
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测试复杂的 Mermaid 图表渲染
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</div>
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<pre><code class="language-mermaid">
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classDiagram
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Animal <|-- Duck
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Animal <|-- Fish
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Animal <|-- Zebra
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Animal : +int age
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Animal : +String gender
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Animal: +isMammal()
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Animal: +mate()
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class Duck{
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+String beakColor
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+swim()
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+quack()
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}
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class Fish{
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-int sizeInFeet
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-canEat()
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}
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class Zebra{
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+bool is_wild
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+run()
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}
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</code></pre>
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</div>
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<script>
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// 初始化 Mermaid
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mermaid.initialize({
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startOnLoad: false,
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theme: 'default',
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securityLevel: 'loose'
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});
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// 模拟主题的 convertMermaidCodeblocks 函数
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function convertMermaidCodeblocks(){
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const selectors = [
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'pre > code.language-mermaid',
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'pre > code.mermaid',
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'code.language-mermaid',
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'pre[data-lang="mermaid"]'
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];
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let processedCount = 0;
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selectors.forEach(selector => {
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document.querySelectorAll(selector).forEach(element => {
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if (element.dataset.mermaidProcessed) {
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return;
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}
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let code = element.textContent.trim();
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if (!code) {
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return;
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}
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const container = document.createElement('div');
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container.className = 'mermaid-from-codeblock';
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container.textContent = code;
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container.dataset.processed = 'true';
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const targetElement = element.closest('pre') || element;
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if (targetElement.parentNode) {
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targetElement.parentNode.replaceChild(container, targetElement);
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processedCount++;
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}
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element.dataset.mermaidProcessed = 'true';
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});
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});
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console.log('[Mermaid] 转换了 ' + processedCount + ' 个代码块');
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}
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// 渲染 Mermaid 图表
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function renderMermaidCharts(){
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const blocks = document.querySelectorAll('.mermaid-from-codeblock');
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console.log('[Mermaid] 找到 ' + blocks.length + ' 个待渲染的图表');
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blocks.forEach((block, index) => {
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const id = 'mermaid-' + Date.now() + '-' + index;
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const code = block.textContent;
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try {
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mermaid.render(id, code).then(result => {
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block.innerHTML = result.svg;
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console.log('[Mermaid] 成功渲染图表 ' + (index + 1));
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}).catch(error => {
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console.error('[Mermaid] 渲染失败:', error);
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block.innerHTML = '<div style="color: red; padding: 10px; border: 1px solid red; border-radius: 4px;">渲染失败: ' + error.message + '</div>';
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});
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} catch (error) {
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console.error('[Mermaid] 渲染异常:', error);
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}
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});
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}
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// 页面加载完成后执行
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document.addEventListener('DOMContentLoaded', function(){
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console.log('[测试] 开始执行代码块转换');
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convertMermaidCodeblocks();
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console.log('[测试] 开始渲染 Mermaid 图表');
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setTimeout(renderMermaidCharts, 100);
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});
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</script>
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</body>
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</html>
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