angular2
Version:
Angular 2 - a web framework for modern web apps
255 lines • 31 kB
JavaScript
;"use strict";
var lang_1 = require('angular2/src/facade/lang');
var _nextClassId = 0;
function extractAnnotation(annotation) {
if (lang_1.isFunction(annotation) && annotation.hasOwnProperty('annotation')) {
// it is a decorator, extract annotation
annotation = annotation.annotation;
}
return annotation;
}
function applyParams(fnOrArray, key) {
if (fnOrArray === Object || fnOrArray === String || fnOrArray === Function ||
fnOrArray === Number || fnOrArray === Array) {
throw new Error("Can not use native " + lang_1.stringify(fnOrArray) + " as constructor");
}
if (lang_1.isFunction(fnOrArray)) {
return fnOrArray;
}
else if (fnOrArray instanceof Array) {
var annotations = fnOrArray;
var fn = fnOrArray[fnOrArray.length - 1];
if (!lang_1.isFunction(fn)) {
throw new Error("Last position of Class method array must be Function in key " + key + " was '" + lang_1.stringify(fn) + "'");
}
var annoLength = annotations.length - 1;
if (annoLength != fn.length) {
throw new Error("Number of annotations (" + annoLength + ") does not match number of arguments (" + fn.length + ") in the function: " + lang_1.stringify(fn));
}
var paramsAnnotations = [];
for (var i = 0, ii = annotations.length - 1; i < ii; i++) {
var paramAnnotations = [];
paramsAnnotations.push(paramAnnotations);
var annotation = annotations[i];
if (annotation instanceof Array) {
for (var j = 0; j < annotation.length; j++) {
paramAnnotations.push(extractAnnotation(annotation[j]));
}
}
else if (lang_1.isFunction(annotation)) {
paramAnnotations.push(extractAnnotation(annotation));
}
else {
paramAnnotations.push(annotation);
}
}
Reflect.defineMetadata('parameters', paramsAnnotations, fn);
return fn;
}
else {
throw new Error("Only Function or Array is supported in Class definition for key '" + key + "' is '" + lang_1.stringify(fnOrArray) + "'");
}
}
/**
* Provides a way for expressing ES6 classes with parameter annotations in ES5.
*
* ## Basic Example
*
* ```
* var Greeter = ng.Class({
* constructor: function(name) {
* this.name = name;
* },
*
* greet: function() {
* alert('Hello ' + this.name + '!');
* }
* });
* ```
*
* is equivalent to ES6:
*
* ```
* class Greeter {
* constructor(name) {
* this.name = name;
* }
*
* greet() {
* alert('Hello ' + this.name + '!');
* }
* }
* ```
*
* or equivalent to ES5:
*
* ```
* var Greeter = function (name) {
* this.name = name;
* }
*
* Greeter.prototype.greet = function () {
* alert('Hello ' + this.name + '!');
* }
* ```
*
* ### Example with parameter annotations
*
* ```
* var MyService = ng.Class({
* constructor: [String, [new Query(), QueryList], function(name, queryList) {
* ...
* }]
* });
* ```
*
* is equivalent to ES6:
*
* ```
* class MyService {
* constructor(name: string, @Query() queryList: QueryList) {
* ...
* }
* }
* ```
*
* ### Example with inheritance
*
* ```
* var Shape = ng.Class({
* constructor: (color) {
* this.color = color;
* }
* });
*
* var Square = ng.Class({
* extends: Shape,
* constructor: function(color, size) {
* Shape.call(this, color);
* this.size = size;
* }
* });
* ```
*/
function Class(clsDef) {
var constructor = applyParams(clsDef.hasOwnProperty('constructor') ? clsDef.constructor : undefined, 'constructor');
var proto = constructor.prototype;
if (clsDef.hasOwnProperty('extends')) {
if (lang_1.isFunction(clsDef.extends)) {
constructor.prototype = proto =
Object.create(clsDef.extends.prototype);
}
else {
throw new Error("Class definition 'extends' property must be a constructor function was: " + lang_1.stringify(clsDef.extends));
}
}
for (var key in clsDef) {
if (key != 'extends' && key != 'prototype' && clsDef.hasOwnProperty(key)) {
proto[key] = applyParams(clsDef[key], key);
}
}
if (this && this.annotations instanceof Array) {
Reflect.defineMetadata('annotations', this.annotations, constructor);
}
if (!constructor['name']) {
constructor['overriddenName'] = "class" + _nextClassId++;
}
return constructor;
}
exports.Class = Class;
var Reflect = lang_1.global.Reflect;
// Throw statement at top-level is disallowed by closure compiler in ES6 input.
// Wrap in an IIFE as a work-around.
(function checkReflect() {
if (!(Reflect && Reflect.getMetadata)) {
throw 'reflect-metadata shim is required when using class decorators';
}
})();
function makeDecorator(annotationCls, chainFn) {
if (chainFn === void 0) { chainFn = null; }
function DecoratorFactory(objOrType) {
var annotationInstance = new annotationCls(objOrType);
if (this instanceof annotationCls) {
return annotationInstance;
}
else {
var chainAnnotation = lang_1.isFunction(this) && this.annotations instanceof Array ? this.annotations : [];
chainAnnotation.push(annotationInstance);
var TypeDecorator = function TypeDecorator(cls) {
var annotations = Reflect.getOwnMetadata('annotations', cls);
annotations = annotations || [];
annotations.push(annotationInstance);
Reflect.defineMetadata('annotations', annotations, cls);
return cls;
};
TypeDecorator.annotations = chainAnnotation;
TypeDecorator.Class = Class;
if (chainFn)
chainFn(TypeDecorator);
return TypeDecorator;
}
}
DecoratorFactory.prototype = Object.create(annotationCls.prototype);
return DecoratorFactory;
}
exports.makeDecorator = makeDecorator;
function makeParamDecorator(annotationCls) {
function ParamDecoratorFactory() {
var args = [];
for (var _i = 0; _i < arguments.length; _i++) {
args[_i - 0] = arguments[_i];
}
var annotationInstance = Object.create(annotationCls.prototype);
annotationCls.apply(annotationInstance, args);
if (this instanceof annotationCls) {
return annotationInstance;
}
else {
ParamDecorator.annotation = annotationInstance;
return ParamDecorator;
}
function ParamDecorator(cls, unusedKey, index) {
var parameters = Reflect.getMetadata('parameters', cls);
parameters = parameters || [];
// there might be gaps if some in between parameters do not have annotations.
// we pad with nulls.
while (parameters.length <= index) {
parameters.push(null);
}
parameters[index] = parameters[index] || [];
var annotationsForParam = parameters[index];
annotationsForParam.push(annotationInstance);
Reflect.defineMetadata('parameters', parameters, cls);
return cls;
}
}
ParamDecoratorFactory.prototype = Object.create(annotationCls.prototype);
return ParamDecoratorFactory;
}
exports.makeParamDecorator = makeParamDecorator;
function makePropDecorator(decoratorCls) {
function PropDecoratorFactory() {
var args = [];
for (var _i = 0; _i < arguments.length; _i++) {
args[_i - 0] = arguments[_i];
}
var decoratorInstance = Object.create(decoratorCls.prototype);
decoratorCls.apply(decoratorInstance, args);
if (this instanceof decoratorCls) {
return decoratorInstance;
}
else {
return function PropDecorator(target, name) {
var meta = Reflect.getOwnMetadata('propMetadata', target.constructor);
meta = meta || {};
meta[name] = meta[name] || [];
meta[name].unshift(decoratorInstance);
Reflect.defineMetadata('propMetadata', meta, target.constructor);
};
}
}
PropDecoratorFactory.prototype = Object.create(decoratorCls.prototype);
return PropDecoratorFactory;
}
exports.makePropDecorator = makePropDecorator;
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{ConcreteType, global, Type, isFunction, stringify} from 'angular2/src/facade/lang';\n\nvar _nextClassId = 0;\n\n/**\n * Declares the interface to be used with {@link Class}.\n */\nexport interface ClassDefinition {\n  /**\n   * Optional argument for specifying the superclass.\n   */\n  extends?: Type;\n\n  /**\n   * Required constructor function for a class.\n   *\n   * The function may be optionally wrapped in an `Array`, in which case additional parameter\n   * annotations may be specified.\n   * The number of arguments and the number of parameter annotations must match.\n   *\n   * See {@link Class} for example of usage.\n   */\n  constructor: Function | any[];\n\n  /**\n   * Other methods on the class. Note that values should have type 'Function' but TS requires\n   * all properties to have a narrower type than the index signature.\n   */\n  [x: string]: Type | Function | any[];\n}\n\n/**\n * An interface implemented by all Angular type decorators, which allows them to be used as ES7\n * decorators as well as\n * Angular DSL syntax.\n *\n * DSL syntax:\n *\n * ```\n * var MyClass = ng\n *   .Component({...})\n *   .View({...})\n *   .Class({...});\n * ```\n *\n * ES7 syntax:\n *\n * ```\n * @ng.Component({...})\n * @ng.View({...})\n * class MyClass {...}\n * ```\n */\nexport interface TypeDecorator {\n  /**\n   * Invoke as ES7 decorator.\n   */\n  <T extends Type>(type: T): T;\n\n  // Make TypeDecorator assignable to built-in ParameterDecorator type.\n  // ParameterDecorator is declared in lib.d.ts as a `declare type`\n  // so we cannot declare this interface as a subtype.\n  // see https://github.com/angular/angular/issues/3379#issuecomment-126169417\n  (target: Object, propertyKey?: string | symbol, parameterIndex?: number): void;\n\n  /**\n   * Storage for the accumulated annotations so far used by the DSL syntax.\n   *\n   * Used by {@link Class} to annotate the generated class.\n   */\n  annotations: any[];\n\n  /**\n   * Generate a class from the definition and annotate it with {@link TypeDecorator#annotations}.\n   */\n  Class(obj: ClassDefinition): ConcreteType;\n}\n\nfunction extractAnnotation(annotation: any): any {\n  if (isFunction(annotation) && annotation.hasOwnProperty('annotation')) {\n    // it is a decorator, extract annotation\n    annotation = annotation.annotation;\n  }\n  return annotation;\n}\n\nfunction applyParams(fnOrArray: (Function | any[]), key: string): Function {\n  if (fnOrArray === Object || fnOrArray === String || fnOrArray === Function ||\n      fnOrArray === Number || fnOrArray === Array) {\n    throw new Error(`Can not use native ${stringify(fnOrArray)} as constructor`);\n  }\n  if (isFunction(fnOrArray)) {\n    return <Function>fnOrArray;\n  } else if (fnOrArray instanceof Array) {\n    var annotations: any[] = fnOrArray;\n    var fn: Function = fnOrArray[fnOrArray.length - 1];\n    if (!isFunction(fn)) {\n      throw new Error(\n          `Last position of Class method array must be Function in key ${key} was '${stringify(fn)}'`);\n    }\n    var annoLength = annotations.length - 1;\n    if (annoLength != fn.length) {\n      throw new Error(\n          `Number of annotations (${annoLength}) does not match number of arguments (${fn.length}) in the function: ${stringify(fn)}`);\n    }\n    var paramsAnnotations: any[][] = [];\n    for (var i = 0, ii = annotations.length - 1; i < ii; i++) {\n      var paramAnnotations: any[] = [];\n      paramsAnnotations.push(paramAnnotations);\n      var annotation = annotations[i];\n      if (annotation instanceof Array) {\n        for (var j = 0; j < annotation.length; j++) {\n          paramAnnotations.push(extractAnnotation(annotation[j]));\n        }\n      } else if (isFunction(annotation)) {\n        paramAnnotations.push(extractAnnotation(annotation));\n      } else {\n        paramAnnotations.push(annotation);\n      }\n    }\n    Reflect.defineMetadata('parameters', paramsAnnotations, fn);\n    return fn;\n  } else {\n    throw new Error(\n        `Only Function or Array is supported in Class definition for key '${key}' is '${stringify(fnOrArray)}'`);\n  }\n}\n\n/**\n * Provides a way for expressing ES6 classes with parameter annotations in ES5.\n *\n * ## Basic Example\n *\n * ```\n * var Greeter = ng.Class({\n *   constructor: function(name) {\n *     this.name = name;\n *   },\n *\n *   greet: function() {\n *     alert('Hello ' + this.name + '!');\n *   }\n * });\n * ```\n *\n * is equivalent to ES6:\n *\n * ```\n * class Greeter {\n *   constructor(name) {\n *     this.name = name;\n *   }\n *\n *   greet() {\n *     alert('Hello ' + this.name + '!');\n *   }\n * }\n * ```\n *\n * or equivalent to ES5:\n *\n * ```\n * var Greeter = function (name) {\n *   this.name = name;\n * }\n *\n * Greeter.prototype.greet = function () {\n *   alert('Hello ' + this.name + '!');\n * }\n * ```\n *\n * ### Example with parameter annotations\n *\n * ```\n * var MyService = ng.Class({\n *   constructor: [String, [new Query(), QueryList], function(name, queryList) {\n *     ...\n *   }]\n * });\n * ```\n *\n * is equivalent to ES6:\n *\n * ```\n * class MyService {\n *   constructor(name: string, @Query() queryList: QueryList) {\n *     ...\n *   }\n * }\n * ```\n *\n * ### Example with inheritance\n *\n * ```\n * var Shape = ng.Class({\n *   constructor: (color) {\n *     this.color = color;\n *   }\n * });\n *\n * var Square = ng.Class({\n *   extends: Shape,\n *   constructor: function(color, size) {\n *     Shape.call(this, color);\n *     this.size = size;\n *   }\n * });\n * ```\n */\nexport function Class(clsDef: ClassDefinition): ConcreteType {\n  var constructor = applyParams(\n      clsDef.hasOwnProperty('constructor') ? clsDef.constructor : undefined, 'constructor');\n  var proto = constructor.prototype;\n  if (clsDef.hasOwnProperty('extends')) {\n    if (isFunction(clsDef.extends)) {\n      (<Function>constructor).prototype = proto =\n          Object.create((<Function>clsDef.extends).prototype);\n    } else {\n      throw new Error(\n          `Class definition 'extends' property must be a constructor function was: ${stringify(clsDef.extends)}`);\n    }\n  }\n  for (var key in clsDef) {\n    if (key != 'extends' && key != 'prototype' && clsDef.hasOwnProperty(key)) {\n      proto[key] = applyParams(clsDef[key], key);\n    }\n  }\n\n  if (this && this.annotations instanceof Array) {\n    Reflect.defineMetadata('annotations', this.annotations, constructor);\n  }\n\n  if (!constructor['name']) {\n    constructor['overriddenName'] = `class${_nextClassId++}`;\n  }\n\n  return <ConcreteType>constructor;\n}\n\nvar Reflect = global.Reflect;\n// Throw statement at top-level is disallowed by closure compiler in ES6 input.\n// Wrap in an IIFE as a work-around.\n(function checkReflect() {\n  if (!(Reflect && Reflect.getMetadata)) {\n    throw 'reflect-metadata shim is required when using class decorators';\n  }\n})();\n\nexport function makeDecorator(\n    annotationCls, chainFn: (fn: Function) => void = null): (...args: any[]) => (cls: any) => any {\n  function DecoratorFactory(objOrType): (cls: any) => any {\n    var annotationInstance = new (<any>annotationCls)(objOrType);\n    if (this instanceof annotationCls) {\n      return annotationInstance;\n    } else {\n      var chainAnnotation =\n          isFunction(this) && this.annotations instanceof Array ? this.annotations : [];\n      chainAnnotation.push(annotationInstance);\n      var TypeDecorator: TypeDecorator = <TypeDecorator>function TypeDecorator(cls) {\n        var annotations = Reflect.getOwnMetadata('annotations', cls);\n        annotations = annotations || [];\n        annotations.push(annotationInstance);\n        Reflect.defineMetadata('annotations', annotations, cls);\n        return cls;\n      };\n      TypeDecorator.annotations = chainAnnotation;\n      TypeDecorator.Class = Class;\n      if (chainFn) chainFn(TypeDecorator);\n      return TypeDecorator;\n    }\n  }\n  DecoratorFactory.prototype = Object.create(annotationCls.prototype);\n  return DecoratorFactory;\n}\n\nexport function makeParamDecorator(annotationCls): any {\n  function ParamDecoratorFactory(...args): any {\n    var annotationInstance = Object.create(annotationCls.prototype);\n    annotationCls.apply(annotationInstance, args);\n    if (this instanceof annotationCls) {\n      return annotationInstance;\n    } else {\n      (<any>ParamDecorator).annotation = annotationInstance;\n      return ParamDecorator;\n    }\n\n\n    function ParamDecorator(cls, unusedKey, index): any {\n      var parameters: any[][] = Reflect.getMetadata('parameters', cls);\n      parameters = parameters || [];\n\n      // there might be gaps if some in between parameters do not have annotations.\n      // we pad with nulls.\n      while (parameters.length <= index) {\n        parameters.push(null);\n      }\n\n      parameters[index] = parameters[index] || [];\n      var annotationsForParam: any[] = parameters[index];\n      annotationsForParam.push(annotationInstance);\n\n      Reflect.defineMetadata('parameters', parameters, cls);\n      return cls;\n    }\n  }\n  ParamDecoratorFactory.prototype = Object.create(annotationCls.prototype);\n  return ParamDecoratorFactory;\n}\n\nexport function makePropDecorator(decoratorCls): any {\n  function PropDecoratorFactory(...args): any {\n    var decoratorInstance = Object.create(decoratorCls.prototype);\n    decoratorCls.apply(decoratorInstance, args);\n\n    if (this instanceof decoratorCls) {\n      return decoratorInstance;\n    } else {\n      return function PropDecorator(target: any, name: string) {\n        var meta = Reflect.getOwnMetadata('propMetadata', target.constructor);\n        meta = meta || {};\n        meta[name] = meta[name] || [];\n        meta[name].unshift(decoratorInstance);\n        Reflect.defineMetadata('propMetadata', meta, target.constructor);\n      };\n    }\n  }\n  PropDecoratorFactory.prototype = Object.create(decoratorCls.prototype);\n  return PropDecoratorFactory;\n}\n"]}