2022-01-10 19:22:21 +08:00
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---
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order: 1
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---
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# 客户端内核
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<img src="https://nocobase.oss-cn-beijing.aliyuncs.com/5be7ebc2f47effef85be7a0c75cf76f9.png" style="max-width: 800px;" />
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示例:
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```tsx | pure
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const app = new Application();
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app.use([MemoryRouter, { initialEntries: ['/'] }]);
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app.use(({ children }) => {
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const location = useLocation();
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if (location.pathname === '/hello') {
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return <div>Hello NocoBase!</div>;
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}
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return children;
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});
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export default app.compose();
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```
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## RouteSwitch
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稍微复杂的应用都会用到路由来管理前端的页面,如下:
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```jsx
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/**
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* defaultShowCode: true
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* title: Router
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*/
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import React from 'react';
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import { Route, Switch, Link, MemoryRouter as Router } from 'react-router-dom';
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const Home = () => <h1>Home</h1>;
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const About = () => <h1>About</h1>;
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const App = () => (
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<Router initialEntries={['/']}>
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<Link to={'/'}>Home</Link>, <Link to={'/about'}>About</Link>
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<Switch>
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<Route exact path="/">
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<Home />
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</Route>
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<Route path="/about">
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<About />
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</Route>
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</Switch>
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</Router>
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);
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export default App;
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```
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上述例子,组件经由路由转发,`/` 转发给 `Home`,`/about` 转发给 `About`。这种 JSX 的写法,对于熟悉 JSX 的开发来说,十分便捷,但需要开发来编写和维护,不符合 NocoBase 低代码、无代码的设计理念。所以将 Route 做了封装和配置化改造,如下:
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```tsx
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/**
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* defaultShowCode: true
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* title: RouteSwitch
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*/
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import React from 'react';
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import { Link, MemoryRouter as Router } from 'react-router-dom';
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import { RouteRedirectProps, RouteSwitchProvider, RouteSwitch } from '@nocobase/client';
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const Home = () => <h1>Home</h1>;
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const About = () => <h1>About</h1>;
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const routes: RouteRedirectProps[] = [
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{
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type: 'route',
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path: '/',
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exact: true,
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component: 'Home',
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},
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{
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type: 'route',
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path: '/about',
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component: 'About',
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},
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];
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export default () => {
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return (
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<RouteSwitchProvider components={{ Home, About }}>
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<Router initialEntries={['/']}>
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<Link to={'/'}>Home</Link>, <Link to={'/about'}>About</Link>
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<RouteSwitch routes={routes} />
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</Router>
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</RouteSwitchProvider>
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);
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};
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```
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- 由 RouteSwitchProvider 配置 components,由开发编写,以 Layout 或 Template 的方式提供给 RouteSwitch 使用。
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- 由 RouteSwitch 配置 routes,JSON 的方式,可以由后端获取,方便后续的动态化、无代码的支持。
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## SchemaComponent
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路由可以通过 JSON 的方式配置,可以注册诸多可供路由使用的组件模板,以方便各种场景支持,但是这些组件还是需要开发编写和维护,所以进一步将组件抽象,转换成配置化的方式。如:
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```tsx
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/**
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* defaultShowCode: true
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* title: Schema Component
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*/
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import React from 'react';
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import { ISchema } from '@formily/react';
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import { SchemaComponentProvider, SchemaComponent } from '@nocobase/client';
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const schema: ISchema = {
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name: 'hello',
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'x-component': 'Hello',
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'x-component-props': {
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name: 'World',
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},
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};
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const Hello = ({ name }) => <h1>Hello {name}!</h1>;
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export default function App() {
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return (
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<SchemaComponentProvider components={{ Hello }}>
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<SchemaComponent schema={schema} />
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</SchemaComponentProvider>
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)
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};
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```
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可以通过 schema 方式配置的组件,称之为 schema 组件。在 SchemaComponentProvider 里注册各种 JSX 组件,编写相应的 schema,再通过 SchemaComponent 渲染。SchemaComponent 的 schema 就是 Formily 的 [Schema](https://react.formilyjs.org/zh-CN/api/shared/schema)。实际上 SchemaComponent 就是 Formily 的 [SchemaField](https://react.formilyjs.org/zh-CN/api/components/schema-field),之所以叫 SchemaComponent,是因为 SchemaComponent 可用于构建页面的各个部分,不局限于表单场景。
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**思维转换:**
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虽然 Formily 的核心是致力于解决表单的复杂问题,但是随着不断的演变,已经不局限在表单层面了。Formily 核心提供了 Form 和 Field 两个非常重要的模型,Form 提供了路径系统和联动模型也同样适用于页面视图,Field 实际上也可以理解为组件,分为有值组件和无值组件两类,有值组件例如 Input、Select 等,无值组件例如 Drawer、Button 等。有值组件的数值又可以分不同类型:String、Number、Boolean、Object、Array 等等,无值组件没有数值,所以用 Void 表示,和 Formily 的 Field、ArrayField、ObjectField、VoidField 都对应上了。
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为了适应动态的配置化表单解决方案,Formily 又提炼了 Schema 协议(DSL),这个协议完全适用于描述组件模型,用类 JSON Schema 的语法描述组件结构和对应的数值类型,这个 Schema 也是 SchemaComponent 的重要组成部分。
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- Schema 是一个树结构,多个节点以树形结构连接起来,其中的一个 property 表示的就是其中的一个 Schema 节点。
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- 单 Schema 节点(不包括 properties)由核心 `x-component`、包装器 `x-decorator`、设计器 `x-designable` 三个组件构成。
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- `x-component` 核心组件
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- `x-decorator` 包装器,不同场景中,同一个核心组件,可能使用不同的包装器,如 FormItem、CardItem、BlockItem、Editable 等
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- `x-designable` 节点设计器(NocoBase 的扩展参数),一般为当前 schema 节点的配置表单。与 Formily 提供的 Designable 解决方案不同,`x-designable` 直接作用于当前 schema 节点,使用和配置不分离。
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理论上,很多现有组件都可以直接转为 schema 组件,但是并不一定好用。以 Drawer 为例,常规 JSX 的写法一般是这样的:
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```tsx
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/**
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* defaultShowCode: true
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* title: JSX Drawer
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*/
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import React, { useState } from 'react';
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import { Drawer, Button } from 'antd';
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const App: React.FC = () => {
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const [visible, setVisible] = useState(false);
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const showDrawer = () => {
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setVisible(true);
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};
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const onClose = () => {
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setVisible(false);
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};
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return (
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<>
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<Button type="primary" onClick={showDrawer}>
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Open
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</Button>
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<Drawer
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title="Basic Drawer"
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placement="right"
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onClose={onClose}
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visible={visible}
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footer={
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<Button onClick={onClose}>关闭</Button>
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}
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>
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<p>Some contents...</p>
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<p>Some contents...</p>
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<p>Some contents...</p>
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</Drawer>
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</>
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);
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};
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export default App;
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```
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将组件转换成 schema,如果 1:1 转换是这样的:
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```tsx
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/**
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* defaultShowCode: true
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* title: Drawer Schema
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*/
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import React, { useMemo } from 'react';
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import { SchemaComponentProvider, SchemaComponent } from '@nocobase/client';
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import { Drawer as AntdDrawer, Button } from 'antd';
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import { createForm } from '@formily/core';
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import { RecursionField } from '@formily/react';
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const Drawer = (props) => {
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const { footerSchema, ...others } = props;
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return (
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<AntdDrawer
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footer={
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footerSchema && <RecursionField schema={footerSchema} onlyRenderProperties />
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}
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{...others}
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/>
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);
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};
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const schema = {
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type: 'object',
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properties: {
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b1: {
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type: 'void',
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'x-component': 'Button',
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'x-component-props': {
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children: 'Open',
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type: 'primary',
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onClick: '{{showDrawer}}',
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},
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},
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d1: {
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type: 'void',
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'x-component': 'Drawer',
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'x-component-props': {
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title: 'Basic Drawer',
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onClose: '{{onClose}}',
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footerSchema: {
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type: 'object',
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properties: {
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fb1: {
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type: 'void',
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'x-component': 'Button',
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'x-component-props': {
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children: 'Close',
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onClick: '{{onClose}}',
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},
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},
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},
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},
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},
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},
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},
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};
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export default function App() {
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const form = useMemo(() => createForm(), []);
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const showDrawer = () => {
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form.query('d1').take((field) => {
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field.componentProps.visible = true;
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});
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};
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const onClose = () => {
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form.query('d1').take((field) => {
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field.componentProps.visible = false;
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});
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};
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return (
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<SchemaComponentProvider
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form={form}
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components={{ Drawer, Button }}
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>
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<SchemaComponent schema={schema} scope={{ showDrawer, onClose }} />
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</SchemaComponentProvider>
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);
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}
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```
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这个例子讲述了怎么将组件转换为可 Schema 配置,虽然达成了某种效果,但并不是一个很好的示例。
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- 一个 property 就是一个 Schema 节点,Drawer 的 Schema 由平行的两个 schema 节点组成,不利于管理;
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- 需要额外的自定义 scope 支持 drawer 组件 visible 的状态管理,而且这里自定义的 scope 复用性差;
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- footer 需要特殊处理。在 x-component-props 里加了个 footerSchema 参数。但这个 footerSchema 并不是一个常规的 schema 节点,因为不是在 properties 里,不利于后端 schema 存储的统一规划;
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- 删除 drawer,需要删除两个 schema 节点;
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- 后端如何输出 drawer 这部分的 schema 也非常不方便,因为 drawer 由平行的两个节点组成。
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为了解决上述问题,从结构上做了一些改良:
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```ts
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{
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type: 'object',
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properties: {
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a1: {
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'x-component': 'Action',
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title: 'Open',
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properties: {
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d1: {
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'x-component': 'Action.Drawer',
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title: 'Drawer Title',
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properties: {
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c1: {
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'x-content': 'Hello',
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},
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f1: {
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'x-component': 'Action.Drawer.Footer',
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properties: {
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a1: {
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'x-component': 'Action',
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title: 'Close',
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'x-component-props': {
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useAction: '{{ useCloseAction }}',
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},
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},
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},
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},
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},
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},
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|
|
|
|
},
|
|
|
|
|
},
|
|
|
|
|
},
|
|
|
|
|
}
|
|
|
|
|
```
|
|
|
|
|
|
|
|
|
|
以上示例,自定义了一个 Action 组件,用于配置按钮操作,又扩展了 Action.Drawer 和 Action.Drawer.Footer 两个特殊节点,分别用于配置抽屉弹框和抽屉的 footer。以上 schema 是个标准的组件树结构,层次十分分明。组件树的各个节点层次分明,schema 的增删改查就完全是标准流程了。
|
|
|
|
|
|
|
|
|
|
- 查询 Drawer 的 schema,只需要把 a1 节点的 json 全部输出就可以。
|
|
|
|
|
- 修改各个节点和子节点都可以单节点独立处理,逻辑一致。
|
|
|
|
|
- 删除时,直接删除不需要的节点就可以了。
|
|
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|
|
- 有利于扩展,比如继续增加 Action.Modal、Action.Modal.Footer 两个节点用于配置对话框。
|
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|
|
|
|
|
|
|
|
Action.Drawer 完整的例子如下:
|
|
|
|
|
|
|
|
|
|
```tsx
|
|
|
|
|
/**
|
|
|
|
|
* title: Action.Drawer
|
|
|
|
|
*/
|
|
|
|
|
import React, { createContext, useContext, useMemo, useState } from 'react';
|
|
|
|
|
import { createPortal } from 'react-dom';
|
|
|
|
|
import { Button, Drawer } from 'antd';
|
|
|
|
|
import { SchemaComponentProvider, SchemaComponent } from '@nocobase/client';
|
|
|
|
|
import { observer, RecursionField, useField, useFieldSchema, ISchema } from '@formily/react';
|
|
|
|
|
|
|
|
|
|
const VisibleContext = createContext(null);
|
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|
|
|
|
|
|
|
|
const useA = () => {
|
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|
|
return {
|
|
|
|
|
async run() {},
|
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|
|
|
};
|
|
|
|
|
};
|
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|
|
|
|
function useCloseAction() {
|
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|
|
const [, setVisible] = useContext(VisibleContext);
|
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|
|
|
return {
|
|
|
|
|
async run() {
|
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|
|
|
setVisible(false);
|
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|
|
|
},
|
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|
|
|
};
|
|
|
|
|
}
|
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|
|
const Action: any = observer((props: any) => {
|
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|
|
const { useAction = useA, onClick, ...others } = props;
|
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|
|
|
const [visible, setVisible] = useState(false);
|
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|
|
const schema = useFieldSchema();
|
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|
|
const field = useField();
|
|
|
|
|
const { run } = useAction();
|
|
|
|
|
return (
|
|
|
|
|
<VisibleContext.Provider value={[visible, setVisible]}>
|
|
|
|
|
<Button
|
|
|
|
|
{...others}
|
|
|
|
|
onClick={() => {
|
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|
|
onClick && onClick();
|
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|
|
|
setVisible(true);
|
|
|
|
|
run();
|
|
|
|
|
}}
|
|
|
|
|
>
|
|
|
|
|
{schema.title}
|
|
|
|
|
</Button>
|
|
|
|
|
<RecursionField basePath={field.address} schema={schema} onlyRenderProperties />
|
|
|
|
|
</VisibleContext.Provider>
|
|
|
|
|
);
|
|
|
|
|
});
|
|
|
|
|
|
|
|
|
|
Action.Drawer = observer((props: any) => {
|
|
|
|
|
const [visible, setVisible] = useContext(VisibleContext);
|
|
|
|
|
const schema = useFieldSchema();
|
|
|
|
|
const field = useField();
|
|
|
|
|
return (
|
|
|
|
|
<>
|
|
|
|
|
{createPortal(
|
|
|
|
|
<Drawer
|
|
|
|
|
title={schema.title}
|
|
|
|
|
visible={visible}
|
|
|
|
|
onClose={() => setVisible(false)}
|
|
|
|
|
footer={
|
|
|
|
|
<RecursionField
|
|
|
|
|
basePath={field.address}
|
|
|
|
|
schema={schema}
|
|
|
|
|
onlyRenderProperties
|
|
|
|
|
filterProperties={(s) => {
|
|
|
|
|
return s['x-component'] === 'Action.Drawer.Footer';
|
|
|
|
|
}}
|
|
|
|
|
/>
|
|
|
|
|
}
|
|
|
|
|
>
|
|
|
|
|
<RecursionField
|
|
|
|
|
basePath={field.address}
|
|
|
|
|
schema={schema}
|
|
|
|
|
onlyRenderProperties
|
|
|
|
|
filterProperties={(s) => {
|
|
|
|
|
return s['x-component'] !== 'Action.Drawer.Footer';
|
|
|
|
|
}}
|
|
|
|
|
/>
|
|
|
|
|
</Drawer>,
|
|
|
|
|
document.body,
|
|
|
|
|
)}
|
|
|
|
|
</>
|
|
|
|
|
);
|
|
|
|
|
});
|
|
|
|
|
|
|
|
|
|
Action.Drawer.Footer = observer((props: any) => {
|
|
|
|
|
const field = useField();
|
|
|
|
|
const schema = useFieldSchema();
|
|
|
|
|
return <RecursionField basePath={field.address} schema={schema} onlyRenderProperties />;
|
|
|
|
|
});
|
|
|
|
|
|
|
|
|
|
const schema: ISchema = {
|
|
|
|
|
type: 'object',
|
|
|
|
|
properties: {
|
|
|
|
|
a1: {
|
|
|
|
|
'x-component': 'Action',
|
|
|
|
|
'x-component-props': {
|
|
|
|
|
type: 'primary',
|
|
|
|
|
},
|
|
|
|
|
title: 'Open',
|
|
|
|
|
properties: {
|
|
|
|
|
d1: {
|
|
|
|
|
'x-component': 'Action.Drawer',
|
|
|
|
|
title: 'Drawer Title',
|
|
|
|
|
properties: {
|
|
|
|
|
c1: {
|
|
|
|
|
'x-content': 'Hello',
|
|
|
|
|
},
|
|
|
|
|
f1: {
|
|
|
|
|
'x-component': 'Action.Drawer.Footer',
|
|
|
|
|
properties: {
|
|
|
|
|
a1: {
|
|
|
|
|
'x-component': 'Action',
|
|
|
|
|
title: 'Close',
|
|
|
|
|
'x-component-props': {
|
|
|
|
|
useAction: '{{ useCloseAction }}',
|
|
|
|
|
},
|
|
|
|
|
},
|
|
|
|
|
},
|
|
|
|
|
},
|
|
|
|
|
},
|
|
|
|
|
},
|
|
|
|
|
},
|
|
|
|
|
},
|
|
|
|
|
},
|
|
|
|
|
};
|
|
|
|
|
|
|
|
|
|
export default function App() {
|
|
|
|
|
return (
|
|
|
|
|
<SchemaComponentProvider components={{ Action }} scope={{ useCloseAction }}>
|
|
|
|
|
<SchemaComponent schema={schema} />
|
|
|
|
|
</SchemaComponentProvider>
|
|
|
|
|
);
|
|
|
|
|
}
|
|
|
|
|
```
|
|
|
|
|
|
|
|
|
|
## RouteSwitch + SchemaComponent
|
|
|
|
|
|
|
|
|
|
当路由和组件都可以配置之后,可以进一步将二者结合,例子如下:
|
|
|
|
|
|
|
|
|
|
```tsx
|
|
|
|
|
/**
|
|
|
|
|
* defaultShowCode: true
|
|
|
|
|
* title: RouteSwitch + SchemaComponent
|
|
|
|
|
*/
|
|
|
|
|
import React, { useMemo } from 'react';
|
|
|
|
|
import { Link, MemoryRouter as Router } from 'react-router-dom';
|
|
|
|
|
import {
|
|
|
|
|
RouteRedirectProps,
|
|
|
|
|
RouteSwitchProvider,
|
|
|
|
|
RouteSwitch,
|
|
|
|
|
useRoute,
|
|
|
|
|
SchemaComponentProvider,
|
|
|
|
|
SchemaComponent,
|
|
|
|
|
useDesignable,
|
|
|
|
|
} from '@nocobase/client';
|
|
|
|
|
import { Spin, Button } from 'antd';
|
|
|
|
|
import { observer, Schema } from '@formily/react';
|
|
|
|
|
|
|
|
|
|
const Hello = observer(({ name }) => {
|
|
|
|
|
const { patch, remove } = useDesignable();
|
|
|
|
|
return (
|
|
|
|
|
<div>
|
|
|
|
|
<h1>Hello {name}!</h1>
|
|
|
|
|
<Button
|
|
|
|
|
onClick={() => {
|
|
|
|
|
patch('x-component-props.name', Math.random());
|
|
|
|
|
}}
|
|
|
|
|
>更新</Button>
|
|
|
|
|
</div>
|
|
|
|
|
)
|
|
|
|
|
});
|
|
|
|
|
|
|
|
|
|
const RouteSchemaComponent = (props) => {
|
|
|
|
|
const route = useRoute();
|
|
|
|
|
return <SchemaComponent schema={route.schema}/>
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
const routes: RouteRedirectProps[] = [
|
|
|
|
|
{
|
|
|
|
|
type: 'route',
|
|
|
|
|
path: '/',
|
|
|
|
|
exact: true,
|
|
|
|
|
component: 'RouteSchemaComponent',
|
|
|
|
|
schema: {
|
|
|
|
|
name: 'home',
|
|
|
|
|
'x-component': 'Hello',
|
|
|
|
|
'x-component-props': {
|
|
|
|
|
name: 'Home',
|
|
|
|
|
},
|
|
|
|
|
},
|
|
|
|
|
},
|
|
|
|
|
{
|
|
|
|
|
type: 'route',
|
|
|
|
|
path: '/about',
|
|
|
|
|
component: 'RouteSchemaComponent',
|
|
|
|
|
schema: {
|
|
|
|
|
name: 'home',
|
|
|
|
|
'x-component': 'Hello',
|
|
|
|
|
'x-component-props': {
|
|
|
|
|
name: 'About',
|
|
|
|
|
},
|
|
|
|
|
},
|
|
|
|
|
},
|
|
|
|
|
];
|
|
|
|
|
|
|
|
|
|
export default () => {
|
|
|
|
|
return (
|
|
|
|
|
<SchemaComponentProvider components={{ Hello }}>
|
|
|
|
|
<RouteSwitchProvider components={{ RouteSchemaComponent }}>
|
|
|
|
|
<Router initialEntries={['/']}>
|
|
|
|
|
<Link to={'/'}>Home</Link>, <Link to={'/about'}>About</Link>
|
|
|
|
|
<RouteSwitch routes={routes} />
|
|
|
|
|
</Router>
|
|
|
|
|
</RouteSwitchProvider>
|
|
|
|
|
</SchemaComponentProvider>
|
|
|
|
|
);
|
|
|
|
|
};
|
|
|
|
|
```
|
|
|
|
|
|
|
|
|
|
以上例子实现了路由和组件层面的配置化,在开发层面配置了两个组件:
|
|
|
|
|
|
|
|
|
|
- `<RouteSchemaComponent/>` 简易的可以在路由里配置 schema 的方案
|
|
|
|
|
- `<Hello/>` 自定义的 Schema 组件
|
|
|
|
|
|
|
|
|
|
为了让大家更加能感受到 Schema 组件的不一样之处,例子添加了一个简易的随机更新 `x-component-props.name` 值的按钮,当路由切换后,更新后的 name 并不会被重置。这也是 Schema 组件的 Designable 的能力,可以任意的动态更新 schema 配置,实时更新,实时渲染。
|
|
|
|
|
|
|
|
|
|
## Designable
|
|
|
|
|
|
|
|
|
|
SchemaComponent 基于 Formily 的 SchemaField,Formily 提供了 [Designable](https://github.com/alibaba/designable) 来解决 Schema 的配置问题,但是这套方案:
|
|
|
|
|
|
|
|
|
|
- 需要维护两套代码,以 antd 为例,需要同时维护 @formily/antd 和 @designable/formily-antd 两套代码
|
|
|
|
|
- 使用和设计分离,在设计器界面表单无法正常工作
|
|
|
|
|
|
|
|
|
|
另辟蹊径,NocoBase 构想了一种更为便捷的配置方案,使用和配置也可以兼顾,只需要维护一套代码。为此,提炼了一个简易的 `useDesignable()` Hook,可用于任意 Schema 组件中,动态配置 Schema,实时更新,实时渲染。
|
|
|
|
|
|
|
|
|
|
Hook API:
|
|
|
|
|
|
|
|
|
|
```ts
|
|
|
|
|
const {
|
|
|
|
|
designable, // 是否可以配置
|
|
|
|
|
patch, // 更新当前节点配置
|
|
|
|
|
remove, // 移除当前节点
|
|
|
|
|
insertAdjacent, // 在当前节点的相邻位置插入,四个位置:beforeBegin、afterBegin、beforeEnd、afterEnd
|
|
|
|
|
insertBeforeBegin, // 在当前节点的前面插入
|
|
|
|
|
insertAfterBegin, // 在当前节点的第一个子节点前面插入
|
|
|
|
|
insertBeforeEnd, // 在当前节点的最后一个子节点后面
|
|
|
|
|
insertAfterEnd, // 在当前节点的后面
|
|
|
|
|
} = useDesignable();
|
|
|
|
|
|
|
|
|
|
const schema = {
|
|
|
|
|
'x-component': 'Hello',
|
|
|
|
|
};
|
|
|
|
|
|
|
|
|
|
// 在当前节点的前面插入
|
|
|
|
|
insertBeforeBegin(schema);
|
|
|
|
|
// 等同于
|
|
|
|
|
insertAdjacent('beforeBegin', schema);
|
|
|
|
|
|
|
|
|
|
// 在当前节点的第一个子节点前面插入
|
|
|
|
|
insertAfterBegin(schema);
|
|
|
|
|
// 等同于
|
|
|
|
|
insertAdjacent('afterBegin', schema);
|
|
|
|
|
|
|
|
|
|
// 在当前节点的最后一个子节点后面
|
|
|
|
|
insertBeforeEnd(schema);
|
|
|
|
|
// 等同于
|
|
|
|
|
insertAdjacent('beforeEnd', schema);
|
|
|
|
|
|
|
|
|
|
// 在当前节点的后面
|
|
|
|
|
insertAfterEnd(schema);
|
|
|
|
|
// 等同于
|
|
|
|
|
insertAdjacent('afterEnd', schema);
|
|
|
|
|
```
|
|
|
|
|
|
|
|
|
|
insertAdjacent 的几个插入的位置:
|
|
|
|
|
|
|
|
|
|
```ts
|
|
|
|
|
{
|
|
|
|
|
properties: {
|
|
|
|
|
// beforeBegin 在当前节点的前面插入
|
|
|
|
|
node1: {
|
|
|
|
|
properties: {
|
|
|
|
|
// afterBegin 在当前节点的第一个子节点前面插入
|
|
|
|
|
// ...
|
|
|
|
|
// beforeEnd 在当前节点的最后一个子节点后面
|
|
|
|
|
},
|
|
|
|
|
},
|
|
|
|
|
// afterEnd 在当前节点的后面
|
|
|
|
|
},
|
|
|
|
|
}
|
|
|
|
|
```
|
|
|
|
|
|
|
|
|
|
并不是所有场景都能使用 hook,所以提供了 `createDesignable()` 方法(实际上 `useDesignable()` 也是基于它来实现):
|
|
|
|
|
|
|
|
|
|
```ts
|
|
|
|
|
const dn = createDesignable({
|
|
|
|
|
current: schema,
|
|
|
|
|
});
|
|
|
|
|
|
|
|
|
|
dn.on('afterInsertAdjacent', (position, schema) => {
|
|
|
|
|
|
|
|
|
|
});
|
|
|
|
|
|
|
|
|
|
dn.insertAfterEnd(schema);
|
|
|
|
|
```
|
|
|
|
|
|
|
|
|
|
相关例子如下:
|
|
|
|
|
|
|
|
|
|
<code src="./src/schema-component/demos/demo1.tsx" />
|
|
|
|
|
|
|
|
|
|
insertAdjacent 操作不仅可以用于新增节点,也可以用于现有节点的位置移动,如以下拖拽排序的例子:
|
|
|
|
|
|
|
|
|
|
```tsx
|
|
|
|
|
/**
|
|
|
|
|
* title: 拖拽排序
|
|
|
|
|
*/
|
|
|
|
|
import React from 'react';
|
|
|
|
|
import { uid } from '@formily/shared';
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import { observer, useField, useFieldSchema } from '@formily/react';
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import { DndContext, DragEndEvent, useDraggable, useDroppable } from '@dnd-kit/core';
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import { SchemaComponent, SchemaComponentProvider, createDesignable, useDesignable } from '@nocobase/client';
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const useDragEnd = () => {
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const { refresh } = useDesignable();
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return ({ active, over }: DragEndEvent) => {
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const activeSchema = active?.data?.current?.schema;
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const overSchema = over?.data?.current?.schema;
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if (!activeSchema || !overSchema) {
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return;
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}
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const dn = createDesignable({
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current: overSchema,
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});
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dn.on('afterInsertAdjacent', refresh);
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dn.insertBeforeBeginOrAfterEnd(activeSchema);
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};
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};
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const Page = observer((props) => {
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return <DndContext onDragEnd={useDragEnd()}>{props.children}</DndContext>;
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});
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function Draggable(props) {
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const { attributes, listeners, setNodeRef, transform } = useDraggable({
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id: props.id,
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data: props.data,
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});
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const style = transform
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? {
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transform: `translate3d(${transform.x}px, ${transform.y}px, 0)`,
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}
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: undefined;
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return (
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<button ref={setNodeRef} style={style} {...listeners} {...attributes}>
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{props.children}
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</button>
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);
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}
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function Droppable(props) {
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const { isOver, setNodeRef } = useDroppable({
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id: props.id,
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data: props.data,
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});
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const style = {
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color: isOver ? 'green' : undefined,
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};
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return (
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<div ref={setNodeRef} style={style}>
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{props.children}
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</div>
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);
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}
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const Block = observer((props) => {
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const field = useField();
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const fieldSchema = useFieldSchema();
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return (
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<Droppable id={field.address.toString()} data={{ schema: fieldSchema }}>
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<div style={{ marginBottom: 20, padding: '20px', background: '#f1f1f1' }}>
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Block {fieldSchema.name}{' '}
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<Draggable id={field.address.toString()} data={{ schema: fieldSchema }}>
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Drag
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</Draggable>
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</div>
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</Droppable>
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);
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});
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export default function App() {
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return (
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<SchemaComponentProvider components={{ Page, Block }}>
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<SchemaComponent
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schema={{
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type: 'void',
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name: 'page',
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'x-component': 'Page',
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properties: {
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block1: {
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'x-component': 'Block',
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},
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block2: {
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'x-component': 'Block',
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},
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block3: {
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'x-component': 'Block',
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},
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},
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}}
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/>
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</SchemaComponentProvider>
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);
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}
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```
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## APIClient
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在 WEB 应用里,客户端请求无处不在。为了便于客户端请求,提供的 API 有:
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- APIClient:客户端 SDK
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- APIClientProvider:提供 APIClient 实例的 Context,全局共享
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- useRequest():需要结合 APIClientProvider 来使用
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- useApiClient():获取到当前配置的 apiClient 实例
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```tsx | pure
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const api = new APIClient({
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request, // 将 request 抛出去,方便各种自定义适配
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});
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api.request(options);
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api.resource(name);
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<APIClientProvider apiClient={api}>
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{/* children */}
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</APIClientProvider>
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```
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useRequest() 需要结合 APIClientProvider 一起使用,是对 ahooks 的 useRequest 的封装,支持 resource 请求。
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```ts
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const { data, loading } = useRequest();
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```
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## Providers
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客户端的扩展以 Providers 的形式存在,提供各种可供组件使用的 Context,可全局也可以局部使用。上文我们已经介绍了核心的三个 Providers:
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- RouteSwitchProvider,提供配置路由所需的 Layout 和 Template 组件
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- SchemaComponentProvider,提供配置 Schema 所需的各种组件
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- ApiClientProvider,提供客户端 SDK
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除此之外,还有:
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- Router,实际也是 Provider,提供 History 的 Context,对应的有 BrowserRouter,HashRouter、MemoryRouter、NativeRouter、StaticRouter 几种可选方案
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- AntdConfigProvider,为 antd 组件提供统一的全局化配置
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- I18nextProvider,提供国际化解决方案
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- ACLProvider,提供权限配置,plugin-acl 的前端模块
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- CollectionManagerProvider,提供全局的数据表配置,plugin-collection-manager 的前端模块
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- SystemSettingsProvider,提供系统设置,plugin-system-settings 的前端模块
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- 其他扩展
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多个 Providers 需要嵌套使用:
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```tsx | pure
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<ApiClientProvider>
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<SchemaComponentProvider>
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<RouteSwitchProvider>
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{...}
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</RouteSwitchProvider>
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</SchemaComponentProvider>
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</ApiClientProvider>
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```
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但是这样的方式不利于 Providers 的管理和扩展,为此提炼了 `compose()` 函数用于配置多个 providers,如下:
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2022-01-17 12:25:10 +08:00
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<code defaultShowCode="true" titile="compose" src="./src/application/demos/demo1/index.tsx"/>
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2022-01-10 19:22:21 +08:00
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## Application
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上文例子的 Providers 还是差点意思,再进一步封装改造:
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```tsx | pure
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const app = new Application({});
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app.use(ApiClientProvider);
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app.use([SchemaComponentProvider, { components: { Hello } }]);
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app.use((props) => {
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return (
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<div>
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<Link to={'/'}>Home</Link>,<Link to={'/about'}>About</Link>
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<RouteSwitch routes={routes} />
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</div>
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);
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});
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app.mount('#root');
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// 等于
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ReactDOM.render(<App/>, document.getElementById('root'));
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```
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对比 NocoBase Server Application 中间件的核心实现:
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```ts
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app.use((ctx, next) => {});
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const ctx = this.createContext(req, res)
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await compose(app.middleware)(ctx);
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await respond(ctx);
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```
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通过 app.use() 方法注册各种中间件插件,最后由 compose 来处理中间件,如果有需要也可以往 app.context 里添加各种东西待用。前端在处理 Provider 时也是类似的机制,这也是为什么客户端的扩展是以 Provider 的形式存在的原因。
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从例子来看,以 Provider 的形式扩展是个不错的方案,但是还有两个问题没有解决:
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- Provider 的顺序怎么处理
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- 如何动态的加载前端模块
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未完待续...
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