rochars / minibuffer

;

/**

 * @fileoverview Polyfills for old browsers.

 * @see https://github.com/inexorabletash/polyfill/blob/master/es5.js

 * @see https://gist.github.com/jhermsmeier/9a34b06a107bbf5d2c91

 */

// ES 15.2.3.6 Object.defineProperty ( O, P, Attributes )

// Partial support for most common case - getters, setters, and values

(function() {

  if (!Object.defineProperty ||

      !(function () { try { Object.defineProperty({}, 'x', {}); return true; } catch (e) { return false; } } ())) {

    var orig = Object.defineProperty;

      // In IE8 try built-in implementation for defining properties on DOM prototypes.

      if (o !== Object(o)) { throw TypeError("Object.defineProperty called on non-object"); }

      if (Object.prototype.__defineGetter__ && ('get' in desc)) {

        Object.prototype.__defineGetter__.call(o, prop, desc.get);

      }

      if (Object.prototype.__defineSetter__ && ('set' in desc)) {

        Object.prototype.__defineSetter__.call(o, prop, desc.set);

      }

      if ('value' in desc) {

        o[prop] = desc.value;

      }

      return o;

    };

  }

}());

// On older versions of IE Object.getOwnPropertyDescriptor can only be

// called with DOM elements; Here it is tested against a non-DOM object.

// If an error is raised, the method is replaced.

// by @rochars based on https://gist.github.com/jhermsmeier/9a34b06a107bbf5d2c91

var testObject = {"t":"o"};

var replaceGetOwnPropertyDescriptor = false;

try {

  Object.getOwnPropertyDescriptor(testObject, "t");

} catch(err) {

  replaceGetOwnPropertyDescriptor = true;

}

if (replaceGetOwnPropertyDescriptor) {

    var hasSupport =

      typeof object.__lookupGetter__ === 'function' &&

      typeof object.__lookupSetter__ === 'function'

    // TODO: How does one determine this?!

    var isGetterSetter = !hasSupport ? null :

      object.__lookupGetter__( key ) ||

      object.__lookupSetter__( key )

      configurable: true,

      enumerable: true,

      get: object.__lookupGetter__( key ),

      set: object.__lookupSetter__( key )

    } : {

      configurable: true,

      writable: true,

      enumerable: true,

      value: object[ key ]

    }

  }

}