小工具区域

本页内容

小工具区域是模板中可由管理员放置内容块的命名区域。可用于侧边栏、页脚列、促销横幅,或任何需要编辑者在不改代码的情况下控制的区块。

查询小工具区域

使用 getWidgetArea() 按名称获取小工具区域:

---
import { getWidgetArea } from "emdash";

const sidebar = await getWidgetArea("sidebar");
---

{sidebar && sidebar.widgets.length > 0 && (
  <aside class="sidebar">
    {sidebar.widgets.map(widget => (
      <div class="widget">
        {widget.title && <h3>{widget.title}</h3>}
        <!-- 渲染小工具内容 -->
      </div>
    ))}
  </aside>
)}

若小工具区域不存在,函数返回 null

小工具区域结构

小工具区域包含元数据与一组小工具:

interface WidgetArea {
	id: string;
	name: string; // 唯一标识(如 "sidebar"、"footer-1")
	label: string; // 显示名称(如「主侧边栏」)
	description?: string;
	widgets: Widget[];
}

interface Widget {
	id: string;
	type: "content" | "menu" | "component";
	title?: string;
	// 按类型区分的字段
	content?: PortableTextBlock[]; // 内容类小工具
	menuName?: string; // 菜单类小工具
	componentId?: string; // 组件类小工具
	componentProps?: Record<string, unknown>;
}

小工具类型

EmDash 支持三种小工具类型:

内容小工具

以 Portable Text 存储的富文本。使用 PortableText 组件渲染:

---
import { PortableText } from "emdash/ui";
---

{widget.type === "content" && widget.content && (
  <div class="widget-content">
    <PortableText value={widget.content} />
  </div>
)}

菜单小工具

在小工具区域内显示导航菜单:

---
import { getMenu } from "emdash";

const menu = widget.menuName ? await getMenu(widget.menuName) : null;
---

{widget.type === "menu" && menu && (
  <nav class="widget-nav">
    <ul>
      {menu.items.map(item => (
        <li><a href={item.url}>{item.label}</a></li>
      ))}
    </ul>
  </nav>
)}

组件小工具

渲染已注册的组件并传入可配置属性。EmDash 内置以下核心组件:

组件 ID说明Props
core:recent-posts最近文章列表count, showThumbnails, showDate
core:categories分类列表showCount, hierarchical
core:tags标签云showCount, limit
core:search搜索表单placeholder
core:archives按月/年归档type, limit

渲染小工具

创建一个可复用的小工具渲染组件:

---
import { PortableText } from "emdash/ui";
import { getMenu } from "emdash";
import type { Widget } from "emdash";

import RecentPosts from "./widgets/RecentPosts.astro";
import Categories from "./widgets/Categories.astro";
import TagCloud from "./widgets/TagCloud.astro";
import SearchForm from "./widgets/SearchForm.astro";
import Archives from "./widgets/Archives.astro";

interface Props {
  widget: Widget;
}

const { widget } = Astro.props;

const componentMap: Record<string, any> = {
  "core:recent-posts": RecentPosts,
  "core:categories": Categories,
  "core:tags": TagCloud,
  "core:search": SearchForm,
  "core:archives": Archives,
};

const menu = widget.type === "menu" && widget.menuName
  ? await getMenu(widget.menuName)
  : null;
---

<div class="widget">
  {widget.title && <h3 class="widget-title">{widget.title}</h3>}

  {widget.type === "content" && widget.content && (
    <div class="widget-content">
      <PortableText value={widget.content} />
    </div>
  )}

  {widget.type === "menu" && menu && (
    <nav class="widget-menu">
      <ul>
        {menu.items.map(item => (
          <li><a href={item.url}>{item.label}</a></li>
        ))}
      </ul>
    </nav>
  )}

  {widget.type === "component" && widget.componentId && componentMap[widget.componentId] && (
    <Fragment>
      {(() => {
        const Component = componentMap[widget.componentId!];
        return <Component {...widget.componentProps} />;
      })()}
    </Fragment>
  )}
</div>

示例小工具组件

最近文章小工具

---
import { getEmDashCollection } from "emdash";

interface Props {
  count?: number;
  showThumbnails?: boolean;
  showDate?: boolean;
}

const { count = 5, showThumbnails = false, showDate = true } = Astro.props;

const { entries: posts } = await getEmDashCollection("posts", {
  limit: count,
  orderBy: { publishedAt: "desc" },
});
---

<ul class="recent-posts">
  {posts.map(post => (
    <li>
      {showThumbnails && post.data.featured_image && (
        <img src={post.data.featured_image} alt="" class="thumbnail" />
      )}
      <a href={`/posts/${post.slug}`}>{post.data.title}</a>
      {showDate && post.data.publishedAt && (
        <time datetime={post.data.publishedAt.toISOString()}>
          {post.data.publishedAt.toLocaleDateString()}
        </time>
      )}
    </li>
  ))}
</ul>

搜索小工具

---
interface Props {
  placeholder?: string;
}

const { placeholder = "搜索…" } = Astro.props;
---

<form action="/search" method="get" class="search-form">
  <input
    type="search"
    name="q"
    placeholder={placeholder}
    aria-label="搜索"
  />
  <button type="submit">搜索</button>
</form>

在布局中使用小工具区域

以下为带侧边栏小工具区域的博客布局示例:

---
import { getWidgetArea } from "emdash";
import WidgetRenderer from "../components/WidgetRenderer.astro";

const sidebar = await getWidgetArea("sidebar");
---

<div class="layout">
  <main class="content">
    <slot />
  </main>

  {sidebar && sidebar.widgets.length > 0 && (
    <aside class="sidebar">
      {sidebar.widgets.map(widget => (
        <WidgetRenderer widget={widget} />
      ))}
    </aside>
  )}
</div>

<style>
  .layout {
    display: grid;
    grid-template-columns: 1fr 300px;
    gap: 2rem;
  }

  @media (max-width: 768px) {
    .layout {
      grid-template-columns: 1fr;
    }
  }
</style>

列出所有小工具区域

使用 getWidgetAreas() 获取所有已填充小工具的区域:

import { getWidgetAreas } from "emdash";

const areas = await getWidgetAreas();
// 返回所有区域及其小工具

创建小工具区域

在管理后台 /_emdash/admin/widgets 创建,或使用管理 API:

POST /_emdash/api/widget-areas
Content-Type: application/json

{
  "name": "footer-1",
  "label": "页脚第 1 列",
  "description": "页脚第一列"
}

添加内容小工具:

POST /_emdash/api/widget-areas/footer-1/widgets
Content-Type: application/json

{
  "type": "content",
  "title": "关于我们",
  "content": [
    {
      "_type": "block",
      "style": "normal",
      "children": [{ "_type": "span", "text": "欢迎访问本站。" }]
    }
  ]
}

添加组件小工具:

POST /_emdash/api/widget-areas/sidebar/widgets
Content-Type: application/json

{
  "type": "component",
  "title": "最近文章",
  "componentId": "core:recent-posts",
  "componentProps": { "count": 5, "showDate": true }
}

API 参考

getWidgetArea(name)

按名称获取小工具区域及其全部小工具。

参数:

  • name — 小工具区域的唯一标识(字符串)

返回: Promise<WidgetArea | null>

getWidgetAreas()

列出所有小工具区域及其小工具。

返回: Promise<WidgetArea[]>

getWidgetComponents()

列出管理后台可用的小工具组件定义。

返回: WidgetComponentDef[]