Method setupThemeObserver

src/core/nodeviews/code-block.ts:1327–1349

* 设置主题观察器

()

   * 设置主题观察器
   */
  private setupThemeObserver(): void {
    const htmlElement = document.documentElement;

    this.themeObserver = new MutationObserver((mutations) => {
      for (const mutation of mutations) {
        if (mutation.type === "attributes" && mutation.attributeName === "class") {
          const isDark = detectDarkTheme();
          this.updateTheme(isDark);
          // 更新 Mermaid 预览
          if (this.node.attrs.language === "mermaid" && this.mermaidPreview) {
            // 先清空旧内容，避免新旧 SVG 层叠
            this.mermaidPreview.innerHTML = "";
            this.createMermaidPreview(this.cm.state.doc.toString());
          }
        }
      }
    });

    this.themeObserver.observe(htmlElement, {
      attributes: true,
      attributeFilter: ["class"],
    });
  }

  /**
   * 更新主题