image-js/lib/image/core/extend.js

Image processing and manipulation in JavaScript

"use strict";

Object.defineProperty(exports, "__esModule", {
  value: true
});
exports.extendMethod = extendMethod;
exports.extendProperty = extendProperty;
var _hasOwn = _interopRequireDefault(require("has-own"));
var _Image = _interopRequireDefault(require("../Image"));
function _interopRequireDefault(e) { return e && e.__esModule ? e : { default: e }; }
let computedPropertyDescriptor = {
  configurable: true,
  enumerable: false,
  get: undefined
};
function extendMethod(name, method, options = {}) {
  let {
    inPlace = false,
    returnThis = true,
    partialArgs = []
  } = options;
  if (inPlace) {
    _Image.default.prototype[name] = function (...args) {
      // remove computed properties
      this.computed = null;
      let result = method.apply(this, [...partialArgs, ...args]);
      if (returnThis) {
        return this;
      }
      return result;
    };
  } else {
    _Image.default.prototype[name] = function (...args) {
      return method.apply(this, [...partialArgs, ...args]);
    };
  }
  return _Image.default;
}
function extendProperty(name, method, options = {}) {
  let {
    partialArgs = []
  } = options;
  computedPropertyDescriptor.get = function () {
    if (this.computed === null) {
      this.computed = {};
    } else if ((0, _hasOwn.default)(name, this.computed)) {
      return this.computed[name];
    }
    let result = method.apply(this, partialArgs);
    this.computed[name] = result;
    return result;
  };
  Object.defineProperty(_Image.default.prototype, name, computedPropertyDescriptor);
  return _Image.default;
}