lodash-decorators
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A collection of decorators using lodash at it's core.
66 lines • 2.21 kB
JavaScript
;
Object.defineProperty(exports, "__esModule", { value: true });
var isFunction = require("lodash/isFunction");
var factory_1 = require("./factory");
var bind_1 = require("./bind");
/**
* Binds methods of an object to the object itself, overwriting the existing method.
* @export
* @param {string[]} [methods=[]]
* @returns {ClassDecorator}
* @example
*
* @BindAll()
* class MyClass {
* bound() {
* return this;
* }
*
* unbound() {
* return this;
* }
* }
*
* const myClass = new MyClass();
*
* myClass.bound.call(null); // => MyClass {}
* myClass.unbound.call(null); // => MyClass {}
*/
function BindAll(methods) {
if (methods === void 0) { methods = []; }
return function (target) {
bindAllMethods(target, methods);
};
}
exports.BindAll = BindAll;
exports.bindAll = BindAll;
function bindAllMethods(target, methods) {
if (methods === void 0) { methods = []; }
var targetProto = target.prototype;
var proto = target.prototype;
var boundKeys = [];
while (proto && proto !== Object.prototype) {
for (var _i = 0, _a = Object.getOwnPropertyNames(proto); _i < _a.length; _i++) {
var key = _a[_i];
var include = methods.length ? methods.indexOf(key) !== -1 : true;
var descriptor = Object.getOwnPropertyDescriptor(proto, key);
if (include && key !== 'constructor') {
// If this property is a getter and it's NOT an instance decorated
// method, ignore it. Instance decorators are getters until first accessed.
if (descriptor.get) {
var chainData = factory_1.InstanceChainMap.get([proto, key]);
if (!chainData || !chainData.isMethod) {
continue;
}
}
if (isFunction(proto[key]) && boundKeys.indexOf(key) === -1) {
Object.defineProperty(targetProto, key, bind_1.Bind(proto, key, descriptor));
boundKeys.push(key);
}
}
}
proto = Object.getPrototypeOf(proto);
}
}
exports.default = BindAll;
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