mirror of
https://github.com/alibaba/lowcode-engine.git
synced 2026-01-13 17:48:13 +00:00
553 lines
17 KiB
JavaScript
553 lines
17 KiB
JavaScript
import { Component, createElement } from 'rax';
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import PropTypes from 'prop-types';
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import Debug from 'debug';
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import View from 'rax-view';
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import classnames from 'classnames';
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import DataHelper from '../utils/dataHelper';
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import {
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forEach,
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getValue,
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parseData,
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parseExpression,
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isEmpty,
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isSchema,
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isFileSchema,
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isJSExpression,
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isJSSlot,
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isJSFunction,
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transformArrayToMap,
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checkPropTypes,
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generateI18n,
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acceptsRef,
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getFileCssName,
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} from '../utils';
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import VisualDom from '../comp/visualDom';
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import AppContext from '../context/appContext';
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// import CompWrapper from '../hoc/compWrapper';
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const debug = Debug('engine:base');
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const DESIGN_MODE = {
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EXTEND: 'extend',
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BORDER: 'border',
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PREVIEW: 'preview',
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};
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const OVERLAY_LIST = ['Dialog', 'Overlay'];
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let scopeIdx = 0;
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export default class BaseEngine extends Component {
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static dislayName = 'base-engine';
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static propTypes = {
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locale: PropTypes.string,
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messages: PropTypes.object,
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__appHelper: PropTypes.object,
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__components: PropTypes.object,
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__componentsMap: PropTypes.object,
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__ctx: PropTypes.object,
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__schema: PropTypes.object,
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};
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static defaultProps = {
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__schema: {},
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};
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static contextType = AppContext;
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constructor(props, context) {
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super(props, context);
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this.appHelper = props.__appHelper;
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this.__compScopes = {};
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const { locale, messages } = props;
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this.i18n = generateI18n(locale, messages);
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this.__bindCustomMethods(props);
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}
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async getSnapshotBeforeUpdate() {
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this.__setLifeCycleMethods('getSnapshotBeforeUpdate', arguments);
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}
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async componentDidMount() {
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this.reloadDataSource();
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this.__setLifeCycleMethods('componentDidMount', arguments);
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}
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async componentDidUpdate() {
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this.__setLifeCycleMethods('componentDidUpdate', arguments);
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}
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async componentWillUnmount() {
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this.__setLifeCycleMethods('componentWillUnmount', arguments);
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}
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async componentDidCatch(e) {
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this.__setLifeCycleMethods('componentDidCatch', arguments);
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console.warn(e);
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}
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reloadDataSource = () =>
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new Promise((resolve, reject) => {
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debug('reload data source');
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if (!this.__dataHelper) {
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this.__showPlaceholder = false;
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return resolve();
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}
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this.__dataHelper
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.getInitData()
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.then((res) => {
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this.__showPlaceholder = false;
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if (isEmpty(res)) {
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this.forceUpdate();
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return resolve();
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}
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this.setState(res, resolve);
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})
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.catch((err) => {
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if (this.__showPlaceholder) {
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this.__showPlaceholder = false;
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this.forceUpdate();
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}
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reject(err);
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});
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});
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__setLifeCycleMethods = (method, args) => {
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const lifeCycleMethods = getValue(this.props.__schema, 'lifeCycles', {});
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if (lifeCycleMethods[method]) {
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try {
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return lifeCycleMethods[method].apply(this, args);
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} catch (e) {
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console.error(`[${this.props.__schema.componentName}]生命周期${method}出错`, e);
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}
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}
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};
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__bindCustomMethods = (props = this.props) => {
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const { __schema } = props;
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const customMethodsList = Object.keys(__schema.methods || {}) || [];
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this.__customMethodsList &&
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this.__customMethodsList.forEach((item) => {
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if (!customMethodsList.includes(item)) {
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delete this[item];
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}
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});
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this.__customMethodsList = customMethodsList;
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forEach(__schema.methods, (val, key) => {
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this[key] = val.bind(this);
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});
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};
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__generateCtx = (ctx) => {
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const { pageContext, compContext } = this.context;
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const obj = {
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page: pageContext,
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component: compContext,
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...ctx,
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};
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forEach(obj, (val, key) => {
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this[key] = val;
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});
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};
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__parseData = (data, ctx) => {
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const { __ctx } = this.props;
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return parseData(data, ctx || __ctx || this);
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};
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__initDataSource = (props = this.props) => {
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const schema = props.__schema || {};
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const appHelper = props.__appHelper;
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const dataSource = (schema && schema.dataSource) || {};
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this.__dataHelper = new DataHelper(this, dataSource, appHelper, (config) => this.__parseData(config));
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this.dataSourceMap = this.__dataHelper.dataSourceMap;
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// 设置容器组件占位，若设置占位则在初始异步请求完成之前用loading占位且不渲染容器组件内部内容
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if (this.__parseData(schema.props && schema.props.autoLoading)) {
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this.__showPlaceholder = (dataSource.list || []).some((item) => !!this.__parseData(item.isInit));
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}
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// this.__showPlaceholder = this.__parseData(schema.props && schema.props.autoLoading) && (dataSource.list || []).some(
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// (item) => !!this.__parseData(item.isInit),
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// );
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};
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__render = () => {
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const schema = this.props.__schema;
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this.__setLifeCycleMethods('render');
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const { engine } = this.context;
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if (engine) {
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engine.props.onCompGetCtx(schema, this);
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// 画布场景才需要每次渲染bind自定义方法
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if (engine.props.designMode) {
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this.__bindCustomMethods();
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this.dataSourceMap = this.__dataHelper && this.__dataHelper.updateConfig(schema.dataSource);
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}
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}
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};
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__getRef = (ref) => {
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const { engine } = this.context;
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const { __schema } = this.props;
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engine && engine.props.onCompGetRef(__schema, ref);
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this.__ref = ref;
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};
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__createDom = () => {
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const { __schema, __ctx, __components = {} } = this.props;
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const self = {};
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self.__proto__ = __ctx || this;
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return this.__createVirtualDom(__schema.children, self, {
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schema: __schema,
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Comp: __components[__schema.componentName],
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});
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};
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// 将模型结构转换成react Element
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// schema 模型结构
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// self 为每个渲染组件构造的上下文，self是自上而下继承的
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// parentInfo 父组件的信息，包含schema和Comp
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// idx 若为循环渲染的循环Index
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__createVirtualDom = (schema, self, parentInfo, idx) => {
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if (!schema) return null;
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// rax text prop 兼容处理
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if (schema.componentName === 'Text') {
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if (typeof schema.props.text === 'string') {
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schema = { ...schema };
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schema.children = [schema.props.text];
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}
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}
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const { __appHelper: appHelper, __components: components = {}, __componentsMap: componentsMap = {} } =
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this.props || {};
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const { engine } = this.context || {};
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if (isJSExpression(schema)) {
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return parseExpression(schema, self);
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}
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if (typeof schema === 'string') return schema;
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if (typeof schema === 'number' || typeof schema === 'boolean') {
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return schema.toString();
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}
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if (Array.isArray(schema)) {
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if (schema.length === 1) return this.__createVirtualDom(schema[0], self, parentInfo);
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return schema.map((item, idx) =>
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this.__createVirtualDom(item, self, parentInfo, item && item.__ctx && item.__ctx.lunaKey ? '' : idx),
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);
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}
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// 解析占位组件
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if (schema.componentName === 'Flagment' && schema.children) {
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const tarChildren = isJSExpression(schema.children) ? parseExpression(schema.children, self) : schema.children;
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return this.__createVirtualDom(tarChildren, self, parentInfo);
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}
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if (schema.$$typeof) {
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return schema;
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}
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if (!isSchema(schema)) return null;
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let Comp = components[schema.componentName] || View;
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if (schema.loop !== undefined) {
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return this.__createLoopVirtualDom(
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{
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...schema,
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loop: parseData(schema.loop, self),
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},
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self,
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parentInfo,
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idx,
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);
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}
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const condition = schema.condition === undefined ? true : parseData(schema.condition, self);
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if (!condition) return null;
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let scopeKey = '';
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// 判断组件是否需要生成scope，且只生成一次，挂在this.__compScopes上
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if (Comp.generateScope) {
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const key = parseExpression(schema.props.key, self);
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if (key) {
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// 如果组件自己设置key则使用组件自己的key
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scopeKey = key;
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} else if (!schema.__ctx) {
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// 在生产环境schema没有__ctx上下文，需要手动生成一个lunaKey
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schema.__ctx = {
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lunaKey: `luna${++scopeIdx}`,
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};
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scopeKey = schema.__ctx.lunaKey;
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} else {
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// 需要判断循环的情况
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scopeKey = schema.__ctx.lunaKey + (idx !== undefined ? `_${idx}` : '');
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}
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if (!this.__compScopes[scopeKey]) {
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this.__compScopes[scopeKey] = Comp.generateScope(this, schema);
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}
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}
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// 如果组件有设置scope，需要为组件生成一个新的scope上下文
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if (scopeKey && this.__compScopes[scopeKey]) {
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const compSelf = { ...this.__compScopes[scopeKey] };
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compSelf.__proto__ = self;
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self = compSelf;
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}
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// 容器类组件的上下文通过props传递，避免context传递带来的嵌套问题
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const otherProps = isFileSchema(schema)
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? {
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__schema: schema,
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__appHelper: appHelper,
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__components: components,
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// __componentsMap: componentsMap,
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}
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: {};
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if (engine && engine.props.designMode) {
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otherProps.__designMode = engine.props.designMode;
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}
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const componentInfo = componentsMap[schema.componentName] || {};
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const props = this.__parseProps(schema.props, self, '', {
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schema,
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Comp,
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componentInfo: {
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...componentInfo,
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props: transformArrayToMap(componentInfo.props, 'name'),
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},
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});
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// 对于可以获取到ref的组件做特殊处理
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if (acceptsRef(Comp)) {
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otherProps.ref = (ref) => {
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const refProps = props.ref;
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if (refProps && typeof refProps === 'string') {
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this[refProps] = ref;
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}
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engine && engine.props.onCompGetRef(schema, ref);
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};
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}
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// scope需要传入到组件上
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if (scopeKey && this.__compScopes[scopeKey]) {
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props.__scope = this.__compScopes[scopeKey];
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}
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if (schema.__ctx && schema.__ctx.lunaKey) {
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if (!isFileSchema(schema)) {
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engine && engine.props.onCompGetCtx(schema, self);
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}
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props.key = props.key || `${schema.__ctx.lunaKey}_${schema.__ctx.idx || 0}_${idx !== undefined ? idx : ''}`;
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} else if (typeof idx === 'number' && !props.key) {
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props.key = idx;
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}
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props.__id = schema.id;
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let Child = null;
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if (!isFileSchema(schema) && schema.children) {
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Child = this.__createVirtualDom(
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isJSExpression(schema.children) ? parseExpression(schema.children, self) : schema.children,
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self,
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{
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schema,
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Comp,
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},
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);
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}
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const renderComp = (props) => engine.createElement(
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Comp,
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props,
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(!isFileSchema(schema)
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&& !!schema.children
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&&
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this.__createVirtualDom(
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isJSExpression(schema.children) ? parseExpression(schema.children, self) : schema.children,
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self,
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{
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schema,
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Comp,
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},
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)) ||
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null,
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);
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// 设计模式下的特殊处理
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if (engine && [DESIGN_MODE.EXTEND, DESIGN_MODE.BORDER].includes(engine.props.designMode)) {
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// 对于overlay,dialog等组件为了使其在设计模式下显示，外层需要增加一个div容器
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if (OVERLAY_LIST.includes(schema.componentName)) {
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const { ref, ...overlayProps } = otherProps;
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return (
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<Div ref={ref} __designMode={engine.props.designMode}>
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{renderComp({ ...props, ...overlayProps })}
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</Div>
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);
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}
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// 虚拟dom显示
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if (componentInfo && componentInfo.parentRule) {
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const parentList = componentInfo.parentRule.split(',');
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const { schema: parentSchema, Comp: parentComp } = parentInfo;
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if (!parentList.includes(parentSchema.componentName) || parentComp !== components[parentSchema.componentName]) {
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props.__componentName = schema.componentName;
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Comp = VisualDom;
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} else {
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// 若虚拟dom在正常的渲染上下文中，就不显示设计模式了
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props.__disableDesignMode = true;
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}
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}
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}
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return renderComp({ ...props, ...otherProps });
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};
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__createLoopVirtualDom = (schema, self, parentInfo, idx) => {
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if (isFileSchema(schema)) {
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console.warn('file type not support Loop');
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return null;
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}
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if (!Array.isArray(schema.loop)) return null;
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const itemArg = (schema.loopArgs && schema.loopArgs[0]) || 'item';
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const indexArg = (schema.loopArgs && schema.loopArgs[1]) || 'index';
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return schema.loop.map((item, i) => {
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const loopSelf = {
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[itemArg]: item,
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[indexArg]: i,
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};
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loopSelf.__proto__ = self;
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return this.__createVirtualDom(
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{
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...schema,
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loop: undefined,
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},
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loopSelf,
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parentInfo,
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idx ? `${idx}_${i}` : i,
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);
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});
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};
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__createContextDom = (childCtx, currCtx, props) => (
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<AppContext.Consumer>
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{(context) => {
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this.context = context;
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this.__generateCtx(currCtx);
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this.__render();
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return (
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<AppContext.Provider
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value={{
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...this.context,
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...childCtx,
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}}
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>
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{context.engine.createElement(
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props.__components.Page,
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{
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...props,
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ref: this.__getRef,
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className: classnames(getFileCssName(props.__schema.fileName), props.className),
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__id: props.__schema.id,
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},
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this.__createDom(),
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)}
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</AppContext.Provider>
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);
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}}
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</AppContext.Consumer>
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);
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__parseProps = (props, self, path, info) => {
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const { schema, Comp, componentInfo = {} } = info;
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const propInfo = getValue(componentInfo.props, path);
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const propType = propInfo && propInfo.extra && propInfo.extra.propType;
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const ignoreParse = schema.__ignoreParse || [];
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const checkProps = (value) => {
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if (!propType) return value;
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return checkPropTypes(value, path, propType, componentInfo.name) ? value : undefined;
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};
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const parseReactNode = (data, params) => {
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if (isEmpty(params)) {
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return checkProps(this.__createVirtualDom(data, self, { schema, Comp }));
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}
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return checkProps(function() {
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const args = {};
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if (Array.isArray(params) && params.length) {
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params.map((item, idx) => {
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if (typeof item === 'string') {
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args[item] = arguments[idx];
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} else if (item && typeof item === 'object') {
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args[item.name] = arguments[idx];
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}
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});
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}
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args.__proto__ = self;
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return self.__createVirtualDom(data, args, { schema, Comp });
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});
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};
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// 判断是否需要解析变量
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if (
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ignoreParse.some((item) => {
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if (item instanceof RegExp) {
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return item.test(path);
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}
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return item === path;
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})
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) {
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return checkProps(props);
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}
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if (isJSExpression(props)) {
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props = parseExpression(props, self);
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// 只有当变量解析出来为模型结构的时候才会继续解析
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if (!isSchema(props) && !isJSSlot(props)) return checkProps(props);
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}
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if (isJSFunction(props)) {
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props = props.value;
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}
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if (isJSSlot(props)) {
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const { params, value } = props;
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if (!isSchema(value) || isEmpty(value)) return undefined;
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return parseReactNode(value, params);
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}
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// 兼容通过componentInfo判断的情况
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if (isSchema(props)) {
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return parseReactNode(props);
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}
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if (Array.isArray(props)) {
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return checkProps(props.map((item, idx) => this.__parseProps(item, self, path ? `${path}.${idx}` : idx, info)));
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}
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if (typeof props === 'function') {
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return checkProps(props.bind(self));
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}
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if (props && typeof props === 'object') {
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if (props.$$typeof) return checkProps(props);
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const res = {};
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forEach(props, (val, key) => {
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if (key.startsWith('__')) {
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res[key] = val;
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return;
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}
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res[key] = this.__parseProps(val, self, path ? `${path}.${key}` : key, info);
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});
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return checkProps(res);
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}
|
||
if (typeof props === 'string') {
|
||
return checkProps(props.trim());
|
||
}
|
||
return checkProps(props);
|
||
};
|
||
|
||
get utils() {
|
||
return this.appHelper && this.appHelper.utils;
|
||
}
|
||
|
||
get constants() {
|
||
return this.appHelper && this.appHelper.constants;
|
||
}
|
||
|
||
get history() {
|
||
return this.appHelper && this.appHelper.history;
|
||
}
|
||
|
||
get location() {
|
||
return this.appHelper && this.appHelper.location;
|
||
}
|
||
|
||
get match() {
|
||
return this.appHelper && this.appHelper.match;
|
||
}
|
||
|
||
render() {
|
||
return null;
|
||
}
|
||
}
|