Current Dev State

static/js/ketcher2/node_modules/d/lazy.js

@@ -0,0 +1,117 @@
+'use strict';
+
+var map        = require('es5-ext/object/map')
+  , isCallable = require('es5-ext/object/is-callable')
+  , validValue = require('es5-ext/object/valid-value')
+  , contains   = require('es5-ext/string/#/contains')
+
+  , call = Function.prototype.call
+  , defineProperty = Object.defineProperty
+  , getOwnPropertyDescriptor = Object.getOwnPropertyDescriptor
+  , getPrototypeOf = Object.getPrototypeOf
+  , hasOwnProperty = Object.prototype.hasOwnProperty
+  , cacheDesc = { configurable: false, enumerable: false, writable: false,
+		value: null }
+  , define;
+
+define = function (name, options) {
+	var value, dgs, cacheName, desc, writable = false, resolvable
+	  , flat;
+	options = Object(validValue(options));
+	cacheName = options.cacheName;
+	flat = options.flat;
+	if (cacheName == null) cacheName = name;
+	delete options.cacheName;
+	value = options.value;
+	resolvable = isCallable(value);
+	delete options.value;
+	dgs = { configurable: Boolean(options.configurable),
+		enumerable: Boolean(options.enumerable) };
+	if (name !== cacheName) {
+		dgs.get = function () {
+			if (hasOwnProperty.call(this, cacheName)) return this[cacheName];
+			cacheDesc.value = resolvable ? call.call(value, this, options) : value;
+			cacheDesc.writable = writable;
+			defineProperty(this, cacheName, cacheDesc);
+			cacheDesc.value = null;
+			if (desc) defineProperty(this, name, desc);
+			return this[cacheName];
+		};
+	} else if (!flat) {
+		dgs.get = function self() {
+			var ownDesc;
+			if (hasOwnProperty.call(this, name)) {
+				ownDesc = getOwnPropertyDescriptor(this, name);
+				// It happens in Safari, that getter is still called after property
+				// was defined with a value, following workarounds that
+				// While in IE11 it may happen that here ownDesc is undefined (go figure)
+				if (ownDesc) {
+					if (ownDesc.hasOwnProperty('value')) return ownDesc.value;
+					if ((typeof ownDesc.get === 'function') && (ownDesc.get !== self)) {
+						return ownDesc.get.call(this);
+					}
+					return value;
+				}
+			}
+			desc.value = resolvable ? call.call(value, this, options) : value;
+			defineProperty(this, name, desc);
+			desc.value = null;
+			return this[name];
+		};
+	} else {
+		dgs.get = function self() {
+			var base = this, ownDesc;
+			if (hasOwnProperty.call(this, name)) {
+				// It happens in Safari, that getter is still called after property
+				// was defined with a value, following workarounds that
+				ownDesc = getOwnPropertyDescriptor(this, name);
+				if (ownDesc.hasOwnProperty('value')) return ownDesc.value;
+				if ((typeof ownDesc.get === 'function') && (ownDesc.get !== self)) {
+					return ownDesc.get.call(this);
+				}
+			}
+			while (!hasOwnProperty.call(base, name)) base = getPrototypeOf(base);
+			desc.value = resolvable ? call.call(value, base, options) : value;
+			defineProperty(base, name, desc);
+			desc.value = null;
+			return base[name];
+		};
+	}
+	dgs.set = function (value) {
+		if (hasOwnProperty.call(this, name)) {
+			throw new TypeError("Cannot assign to lazy defined '" + name + "' property of " + this);
+		}
+		dgs.get.call(this);
+		this[cacheName] = value;
+	};
+	if (options.desc) {
+		desc = {
+			configurable: contains.call(options.desc, 'c'),
+			enumerable: contains.call(options.desc, 'e')
+		};
+		if (cacheName === name) {
+			desc.writable = contains.call(options.desc, 'w');
+			desc.value = null;
+		} else {
+			writable = contains.call(options.desc, 'w');
+			desc.get = dgs.get;
+			desc.set = dgs.set;
+		}
+		delete options.desc;
+	} else if (cacheName === name) {
+		desc = {
+			configurable: Boolean(options.configurable),
+			enumerable: Boolean(options.enumerable),
+			writable: Boolean(options.writable),
+			value: null
+		};
+	}
+	delete options.configurable;
+	delete options.enumerable;
+	delete options.writable;
+	return dgs;
+};
+
+module.exports = function (props) {
+	return map(props, function (desc, name) { return define(name, desc); });
+};