Skip to content
Navigation Menu
{{ message }}
forked from alibaba/lowcode-engine
-
Notifications
You must be signed in to change notification settings - Fork 0
Expand file tree
/
Copy pathnodeToJSX.ts
More file actions
406 lines (344 loc) · 11.3 KB
/
Copy pathnodeToJSX.ts
File metadata and controls
406 lines (344 loc) · 11.3 KB
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
import _ from 'lodash';
import { pipe } from 'fp-ts/function';
import { NodeSchema, isNodeSchema, NodeDataType, CompositeValue } from '@alilc/lowcode-types';
import {
IScope,
CodeGeneratorError,
PIECE_TYPE,
CodePiece,
NodeGenerator,
NodeGeneratorConfig,
NodePlugin,
AttrData,
} from '../types';
import { generateCompositeType } from './compositeType';
import { getStaticExprValue } from './common';
import { executeFunctionStack } from './aopHelper';
import { encodeJsxStringNode } from './encodeJsxAttrString';
import { unwrapJsExprQuoteInJsx } from './jsxHelpers';
import { transformThis2Context } from '../core/jsx/handlers/transformThis2Context';
function mergeNodeGeneratorConfig(
cfg1: NodeGeneratorConfig,
cfg2: NodeGeneratorConfig = {},
): NodeGeneratorConfig {
const resCfg: NodeGeneratorConfig = {};
if (cfg1.handlers || cfg2.handlers) {
resCfg.handlers = {
...(cfg1.handlers || {}),
...(cfg2.handlers || {}),
};
}
if (cfg1.tagMapping || cfg2.tagMapping) {
resCfg.tagMapping = cfg2.tagMapping || cfg1.tagMapping;
}
if (cfg1.attrPlugins || cfg2.attrPlugins) {
resCfg.attrPlugins = [];
resCfg.attrPlugins.push(...(cfg2.attrPlugins || []));
resCfg.attrPlugins.push(...(cfg1.attrPlugins || []));
}
if (cfg1.nodePlugins || cfg2.nodePlugins) {
resCfg.nodePlugins = [];
resCfg.nodePlugins.push(...(cfg2.nodePlugins || []));
resCfg.nodePlugins.push(...(cfg1.nodePlugins || []));
}
return resCfg;
}
export function isPureString(v: string) {
// FIXME: 目前的方式不够严谨
return (v[0] === "'" && v[v.length - 1] === "'") || (v[0] === '"' && v[v.length - 1] === '"');
}
function generateAttrValue(
attrData: { attrName: string; attrValue: CompositeValue },
scope: IScope,
config?: NodeGeneratorConfig,
): CodePiece[] {
const valueStr = generateCompositeType(attrData.attrValue, scope, {
handlers: config?.handlers,
nodeGenerator: config?.self,
});
return [
{
type: PIECE_TYPE.ATTR,
name: attrData.attrName,
value: valueStr,
},
];
}
function generateAttr(
attrName: string,
attrValue: CompositeValue,
scope: IScope,
config?: NodeGeneratorConfig,
): CodePiece[] {
let pieces: CodePiece[];
if (config?.attrPlugins) {
pieces = executeFunctionStack<AttrData, CodePiece[], NodeGeneratorConfig>(
{ attrName, attrValue },
scope,
config.attrPlugins,
generateAttrValue,
config,
);
} else {
pieces = generateAttrValue({ attrName, attrValue }, scope, config);
}
pieces = pieces.map((p) => {
// FIXME: 在经过 generateCompositeType 处理过之后，其实已经无法通过传入值的类型判断传出值是否为纯字面值字符串了（可能包裹了加工函数之类的）
// 因此这个处理最好的方式是对传出值做语法分析，判断以哪种模版产出 Attr 值
let newValue: string;
if (p.value && isPureString(p.value)) {
// 似乎多次一举，目前的诉求是处理多种引号类型字符串的 case，正确处理转义
const content = getStaticExprValue<string>(p.value);
newValue = JSON.stringify(encodeJsxStringNode(content));
} else {
newValue = `{${p.value}}`;
}
return {
value: `${p.name}=${newValue}`,
type: PIECE_TYPE.ATTR,
};
});
return pieces;
}
function generateAttrs(
nodeItem: NodeSchema,
scope: IScope,
config?: NodeGeneratorConfig,
): CodePiece[] {
const { props } = nodeItem;
let pieces: CodePiece[] = [];
if (props) {
if (!Array.isArray(props)) {
Object.keys(props).forEach((propName: string) => {
pieces = pieces.concat(generateAttr(propName, props[propName], scope, config));
});
} else {
props.forEach((prop) => {
if (prop.name && !prop.spread) {
pieces = pieces.concat(generateAttr(prop.name, prop.value, scope, config));
}
// TODO: 处理 spread 场景（<Xxx {...(something)}/>)
// 这种在 schema 里面怎么描述
});
}
}
return pieces;
}
function generateBasicNode(
nodeItem: NodeSchema,
scope: IScope,
config?: NodeGeneratorConfig,
): CodePiece[] {
const pieces: CodePiece[] = [];
const tagName = (config?.tagMapping || _.identity)(nodeItem.componentName);
pieces.push({
value: tagName || '', // FIXME: type detection error
type: PIECE_TYPE.TAG,
});
return pieces;
}
function generateSimpleNode(
nodeItem: NodeSchema,
scope: IScope,
config?: NodeGeneratorConfig,
): CodePiece[] {
const basicParts = generateBasicNode(nodeItem, scope, config) || [];
const attrParts = generateAttrs(nodeItem, scope, config) || [];
const childrenParts: CodePiece[] = [];
if (nodeItem.children && config?.self) {
const childrenStr = config.self(nodeItem.children, scope);
childrenParts.push({
type: PIECE_TYPE.CHILDREN,
value: childrenStr,
});
}
return [...basicParts, ...attrParts, ...childrenParts];
}
function linkPieces(pieces: CodePiece[]): string {
const tagsPieces = pieces.filter((p) => p.type === PIECE_TYPE.TAG);
if (tagsPieces.length !== 1) {
throw new CodeGeneratorError('One node only need one tag define');
}
const tagName = tagsPieces[0].value;
const beforeParts = pieces
.filter((p) => p.type === PIECE_TYPE.BEFORE)
.map((p) => p.value)
.join('');
const afterParts = pieces
.filter((p) => p.type === PIECE_TYPE.AFTER)
.map((p) => p.value)
.join('');
const childrenParts = pieces
.filter((p) => p.type === PIECE_TYPE.CHILDREN)
.map((p) => p.value)
.join('');
let attrsParts = pieces
.filter((p) => p.type === PIECE_TYPE.ATTR)
.map((p) => p.value)
.join(' ');
attrsParts = attrsParts ? ` ${attrsParts}` : '';
if (childrenParts) {
return `${beforeParts}<${tagName}${attrsParts}>${childrenParts}</${tagName}>${afterParts}`;
}
return `${beforeParts}<${tagName}${attrsParts} />${afterParts}`;
}
function generateNodeSchema(
nodeItem: NodeSchema,
scope: IScope,
config?: NodeGeneratorConfig,
): string {
const pieces: CodePiece[] = [];
if (config?.nodePlugins) {
const res = executeFunctionStack<NodeSchema, CodePiece[], NodeGeneratorConfig>(
nodeItem,
scope,
config.nodePlugins,
generateSimpleNode,
config,
);
pieces.push(...res);
} else {
pieces.push(...generateSimpleNode(nodeItem, scope, config));
}
return linkPieces(pieces);
}
// TODO: 生成文档
// 为包裹的代码片段生成子上下文，集成父级上下文，并传入子级上下文新增内容。（如果存在多级上下文怎么处理？）
// 创建新的上下文，并从作用域中取对应同名变量塞到作用域里面？
// export function createSubContext() {}
/**
* JSX 生成逻辑插件。在 React 代码模式下生成 loop 相关的逻辑代码
* @type NodePlugin Extended
*
* @export
* @param {NodeSchema} nodeItem 当前 UI 节点
* @returns {CodePiece[]} 实现功能的相关代码片段
*/
export function generateReactLoopCtrl(
nodeItem: NodeSchema,
scope: IScope,
config?: NodeGeneratorConfig,
next?: NodePlugin,
): CodePiece[] {
if (nodeItem.loop) {
const tolerateEvalErrors = config?.tolerateEvalErrors ?? true;
const loopItemName = nodeItem.loopArgs?.[0] || 'item';
const loopIndexName = nodeItem.loopArgs?.[1] || 'index';
// 新建作用域
const subScope = scope.createSubScope([loopItemName, loopIndexName]);
const pieces: CodePiece[] = next ? next(nodeItem, subScope, config) : [];
// 生成循环变量表达式
const loopDataExpr = pipe(
nodeItem.loop,
// 将 JSExpression 转换为 JS 表达式代码:
(expr) =>
generateCompositeType(expr, scope, {
handlers: config?.handlers,
tolerateEvalErrors: false, // 这个内部不需要包 try catch, 下面会统一加的
}),
// 将 this.xxx 转换为 __$$context.xxx:
(expr) => transformThis2Context(expr, scope, { ignoreRootScope: true }),
// 如果要容忍错误，则包一层 try catch (基于助手函数 __$$evalArray)
(expr) => (tolerateEvalErrors ? `__$$evalArray(() => (${expr}))` : expr),
);
pieces.unshift({
value: `(${loopDataExpr}).map((${loopItemName}, ${loopIndexName}) => ((__$$context) => (`,
type: PIECE_TYPE.BEFORE,
});
pieces.push({
value: `))(__$$createChildContext(__$$context, { ${loopItemName}, ${loopIndexName} })))`,
type: PIECE_TYPE.AFTER,
});
return pieces;
}
return next ? next(nodeItem, scope, config) : [];
}
/**
* JSX 生成逻辑插件。在 React 代码模式下生成 condition 相关的逻辑代码
* @type NodePlugin
*
* @export
* @param {NodeSchema} nodeItem 当前 UI 节点
* @returns {CodePiece[]} 实现功能的相关代码片段
*/
export function generateConditionReactCtrl(
nodeItem: NodeSchema,
scope: IScope,
config?: NodeGeneratorConfig,
next?: NodePlugin,
): CodePiece[] {
const pieces: CodePiece[] = next ? next(nodeItem, scope, config) : [];
if (nodeItem.condition != null && nodeItem.condition !== true) {
const value = generateCompositeType(nodeItem.condition, scope, {
handlers: config?.handlers,
});
pieces.unshift({
value: `!!(${value}) && (`,
type: PIECE_TYPE.BEFORE,
});
pieces.push({
value: ')',
type: PIECE_TYPE.AFTER,
});
}
return pieces;
}
/**
* JSX 生成逻辑插件。在 React 代码模式下，如果 Node 生成结果是一个表达式，则对其进行 { Expression } 包装
* @type NodePlugin
*
* @export
* @param {NodeSchema} nodeItem 当前 UI 节点
* @returns {CodePiece[]} 实现功能的相关代码片段
*/
export function generateReactExprInJS(
nodeItem: NodeSchema,
scope: IScope,
config?: NodeGeneratorConfig,
next?: NodePlugin,
): CodePiece[] {
const pieces: CodePiece[] = next ? next(nodeItem, scope, config) : [];
if ((nodeItem.condition != null && nodeItem.condition !== true) || nodeItem.loop != null) {
pieces.unshift({
value: '{',
type: PIECE_TYPE.BEFORE,
});
pieces.push({
value: '}',
type: PIECE_TYPE.AFTER,
});
}
return pieces;
}
const handleChildren = (v: string[]) => v.join('');
export function createNodeGenerator(cfg: NodeGeneratorConfig = {}): NodeGenerator<string> {
const generateNode = (nodeItem: NodeDataType, scope: IScope): string => {
if (_.isArray(nodeItem)) {
const resList = nodeItem.map((n) => generateNode(n, scope));
return handleChildren(resList);
}
if (isNodeSchema(nodeItem)) {
return generateNodeSchema(nodeItem, scope, {
...cfg,
self: generateNode,
});
}
const valueStr = generateCompositeType(nodeItem, scope, {
handlers: cfg.handlers,
nodeGenerator: generateNode,
});
if (isPureString(valueStr)) {
return encodeJsxStringNode(getStaticExprValue<string>(valueStr));
}
return `{${valueStr}}`;
};
return (nodeItem: NodeDataType, scope: IScope) =>
unwrapJsExprQuoteInJsx(generateNode(nodeItem, scope));
}
const defaultReactGeneratorConfig: NodeGeneratorConfig = {
nodePlugins: [generateReactExprInJS, generateReactLoopCtrl, generateConditionReactCtrl],
};
export function createReactNodeGenerator(cfg?: NodeGeneratorConfig): NodeGenerator<string> {
const newCfg = mergeNodeGeneratorConfig(defaultReactGeneratorConfig, cfg);
return createNodeGenerator(newCfg);
}
You can’t perform that action at this time.