DartWriter

DartWriter 提供生成 Dart 源代码的 API。在开发 flutter/dart 工具时，它可以使您的工作更轻松。您还可以生成 Flutter UI 代码。

Hello World 示例

var context = EditorContext(enableDartFormatter: true);
var code = Method(
  name: 'main',
  returnType: 'void',
  statements: [
    Call('print',
      argument: Argument([
        ArgumentItem("'Hello World!'")
      ])
    ),
    Return('0')
  ]
);
print(context.build([code]));

生成如下

void main() {
  print('Hello World!');
  return 0;
}

Flutter 无状态小部件示例

输入

{
  "as": "Scaffold",
  "appBar": {
    "as": "AppBar",
    "title": {
      "as": "Text",
      "params": [
        "'Ahmet'"
      ]
    },
    "centerTitle": "false"
  },
  "body": {
    "as": "Center",
    "child": {
      "as": "Row",
      "children": [
        {
          "as": "Icon",
          "params": ["Icons.add"],
          "color": "Colors.red"
        },
        {
          "as": "Text",
          "params": ["'Ahmet'"],
          "textAlign": "TextAlign.center"
        }
      ]
    }
  }
}

代码

var context = EditorContext(enableDartFormatter: true);
var dartHelper = DartHelper.instance;
Map map = jsonDecode(json);

var homePage = Class('HomePage',
  baseClass: 'StatelessWidget',
  methods: [
    Annotation('override'),
    Method(
      name: 'build',
      returnType: 'Widget',
      param: Parameter([
        ParameterItem('BuildContext context'),
      ]),
      statements: [ Return(dartHelper.getCodeFromMap(map)) ]
    )
  ]
);

print(context.build([
  Import('package:flutter/material.dart'),
  homePage
]));

生成的 UI 代码

import 'package:flutter/material.dart';

class HomePage extends StatelessWidget {
  @override
  Widget build(BuildContext context) {
    return Scaffold(
        appBar: AppBar(title: Text('Ahmet'), centerTitle: false),
        body: Center(
            child: Row(children: [
          Icon(Icons.add, color: Colors.red),
          Text('Ahmet', textAlign: TextAlign.center)
        ])));
  }
}

安装

在您的 Flutter / Dart 项目的 pubspec.yaml 中，添加以下依赖项

dependencies:
  ...
  dart_writer: any

在您的库文件中添加以下导入：

import 'package:dart_writer/dart_writer.dart';

API文档

• 文档指南
  • 条件
    • If
    • Else If
    • Else
  • 循环
    • For
    • Foreach
    • While
  • 声明
    • 赋值
    • 调用
    • 返回
  • OOP 概念
    • 类
      • 属性
      • 构造函数
      • 方法
        • 方法
        • Getter
        • Setter
    • 接口
  • Other(#other)
    • 注解
    • 导入
    • Enum
    • 参数
    • 参数

条件

Method(
  name: 'getMin',
  returnType: 'int',
  statements: [
    Assign('var num1', '5'),
    Assign('var num2', '10'),
    If(condition: 'num1 < num2', statements: [Return('num1')]),
    ElseIf(condition: 'num1 == num2', statements: [Return('num1')]),
    Else(statements: [Return('num2')])
  ]  
)

生成的代码

int getMin() {
  var num1 = 5;
  var num2 = 10;
  if (num1 < num2) {
    return num1;
  } else if (num1 == num2) {
    return num1;
  } else {
    return num2;
  }
}

循环

Method(
  name: 'loops',
  returnType: 'void',
  statements: [
    For('i = 0', 'i < 5', 'i++',
      statements: [RawCode('print(i);')]
    ),
    ForEach('item', 'userList',
      statements: [
        Return('UserCard(item)')
      ]
    ),
    While('i < 5',
      statements: [ RawCode('print(i);'), Assign('i', 'i + 1')]
    )
  ]  
)

生成的代码

void loops() {
  for (var i = 0; i < 5; i++) {
    print(i);
  }
  for (var item in userList) { 
    return UserCard(item);     
  }
  while (i < 5) {
    print(i);
    i = i + 1;
  }
}

声明

Method(name: 'do', returnType: 'int',
  statements: [
    Assign('var i', '5'),
    Assign('var name', Call('getName')),
    Return('i')
  ] 
)

生成的代码

int do() {
  var i = 5;
  var name = getName();
  return i;
}

OOP 概念

类

构造函数

属性

方法

方法

Getter

Setter

示例类代码

Class(
  'Bird',
  baseClass: 'Animal',
  interfaces: ['Flyable', 'Crowable'],
  mixins: ['Feather', 'Walk'],
  attributes: <Attribute> [
    Attribute(modifiers: 'final', type: 'String', name: 'name'),
  ],
  constructors: <Constructor> [
    Constructor(
      className: 'Bird',
      constructorName: 'fromName',
      param: Parameter([ParameterItem('this.name', isRequired: true, isNamed: true)]),
        superArgument: Argument([ArgumentItem('name')])
    ),
  ],
  methods: [
    Method(
      name: 'onFly',
      returnType: 'double',
      param: Parameter([ParameterItem('double height')]),
      statements: [Return('height * 2')]
    ),
  ]
);

生成的代码

class Bird extends Animal with Feather, Walk implements Flyable, Crowable {   
  final String name;

  Bird.fromName({required this.name}) : super(name);

  double onFly(double height) {        
    return height * 2;
  }
}

接口

示例接口

Interface('Flyable',
    baseClass: 'Breathable',
    prototypes: [
      Method(name: 'doFly', returnType: 'void')
    ]
)

生成的代码

abstract class Flyable extends Breathable {
  void doFly();
}

其他

任务列表

• [ ] 单元测试

GitHub

https://github.com/ahm3tcelik/dart_writer