390 lines
10 KiB
JavaScript
390 lines
10 KiB
JavaScript
"use strict";
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var es5 = require("./es5");
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var canEvaluate = typeof navigator == "undefined";
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var errorObj = {e: {}};
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var tryCatchTarget;
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var globalObject = typeof self !== "undefined" ? self :
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typeof window !== "undefined" ? window :
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typeof global !== "undefined" ? global :
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this !== undefined ? this : null;
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function tryCatcher() {
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try {
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var target = tryCatchTarget;
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tryCatchTarget = null;
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return target.apply(this, arguments);
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} catch (e) {
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errorObj.e = e;
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return errorObj;
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}
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}
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function tryCatch(fn) {
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tryCatchTarget = fn;
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return tryCatcher;
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}
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var inherits = function(Child, Parent) {
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var hasProp = {}.hasOwnProperty;
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function T() {
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this.constructor = Child;
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this.constructor$ = Parent;
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for (var propertyName in Parent.prototype) {
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if (hasProp.call(Parent.prototype, propertyName) &&
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propertyName.charAt(propertyName.length-1) !== "$"
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) {
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this[propertyName + "$"] = Parent.prototype[propertyName];
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}
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}
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}
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T.prototype = Parent.prototype;
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Child.prototype = new T();
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return Child.prototype;
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};
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function isPrimitive(val) {
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return val == null || val === true || val === false ||
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typeof val === "string" || typeof val === "number";
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}
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function isObject(value) {
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return typeof value === "function" ||
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typeof value === "object" && value !== null;
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}
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function maybeWrapAsError(maybeError) {
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if (!isPrimitive(maybeError)) return maybeError;
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return new Error(safeToString(maybeError));
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}
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function withAppended(target, appendee) {
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var len = target.length;
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var ret = new Array(len + 1);
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var i;
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for (i = 0; i < len; ++i) {
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ret[i] = target[i];
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}
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ret[i] = appendee;
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return ret;
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}
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function getDataPropertyOrDefault(obj, key, defaultValue) {
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if (es5.isES5) {
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var desc = Object.getOwnPropertyDescriptor(obj, key);
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if (desc != null) {
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return desc.get == null && desc.set == null
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? desc.value
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: defaultValue;
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}
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} else {
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return {}.hasOwnProperty.call(obj, key) ? obj[key] : undefined;
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}
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}
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function notEnumerableProp(obj, name, value) {
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if (isPrimitive(obj)) return obj;
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var descriptor = {
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value: value,
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configurable: true,
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enumerable: false,
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writable: true
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};
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es5.defineProperty(obj, name, descriptor);
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return obj;
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}
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function thrower(r) {
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throw r;
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}
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var inheritedDataKeys = (function() {
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var excludedPrototypes = [
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Array.prototype,
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Object.prototype,
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Function.prototype
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];
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var isExcludedProto = function(val) {
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for (var i = 0; i < excludedPrototypes.length; ++i) {
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if (excludedPrototypes[i] === val) {
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return true;
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}
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}
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return false;
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};
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if (es5.isES5) {
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var getKeys = Object.getOwnPropertyNames;
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return function(obj) {
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var ret = [];
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var visitedKeys = Object.create(null);
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while (obj != null && !isExcludedProto(obj)) {
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var keys;
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try {
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keys = getKeys(obj);
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} catch (e) {
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return ret;
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}
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for (var i = 0; i < keys.length; ++i) {
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var key = keys[i];
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if (visitedKeys[key]) continue;
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visitedKeys[key] = true;
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var desc = Object.getOwnPropertyDescriptor(obj, key);
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if (desc != null && desc.get == null && desc.set == null) {
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ret.push(key);
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}
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}
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obj = es5.getPrototypeOf(obj);
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}
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return ret;
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};
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} else {
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var hasProp = {}.hasOwnProperty;
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return function(obj) {
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if (isExcludedProto(obj)) return [];
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var ret = [];
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/*jshint forin:false */
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enumeration: for (var key in obj) {
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if (hasProp.call(obj, key)) {
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ret.push(key);
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} else {
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for (var i = 0; i < excludedPrototypes.length; ++i) {
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if (hasProp.call(excludedPrototypes[i], key)) {
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continue enumeration;
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}
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}
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ret.push(key);
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}
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}
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return ret;
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};
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}
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})();
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var thisAssignmentPattern = /this\s*\.\s*\S+\s*=/;
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function isClass(fn) {
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try {
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if (typeof fn === "function") {
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var keys = es5.names(fn.prototype);
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var hasMethods = es5.isES5 && keys.length > 1;
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var hasMethodsOtherThanConstructor = keys.length > 0 &&
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!(keys.length === 1 && keys[0] === "constructor");
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var hasThisAssignmentAndStaticMethods =
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thisAssignmentPattern.test(fn + "") && es5.names(fn).length > 0;
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if (hasMethods || hasMethodsOtherThanConstructor ||
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hasThisAssignmentAndStaticMethods) {
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return true;
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}
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}
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return false;
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} catch (e) {
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return false;
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}
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}
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function toFastProperties(obj) {
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/*jshint -W027,-W055,-W031*/
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function FakeConstructor() {}
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FakeConstructor.prototype = obj;
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var receiver = new FakeConstructor();
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function ic() {
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return typeof receiver.foo;
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}
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ic();
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ic();
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return obj;
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eval(obj);
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}
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var rident = /^[a-z$_][a-z$_0-9]*$/i;
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function isIdentifier(str) {
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return rident.test(str);
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}
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function filledRange(count, prefix, suffix) {
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var ret = new Array(count);
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for(var i = 0; i < count; ++i) {
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ret[i] = prefix + i + suffix;
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}
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return ret;
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}
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function safeToString(obj) {
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try {
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return obj + "";
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} catch (e) {
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return "[no string representation]";
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}
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}
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function isError(obj) {
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return obj instanceof Error ||
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(obj !== null &&
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typeof obj === "object" &&
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typeof obj.message === "string" &&
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typeof obj.name === "string");
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}
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function markAsOriginatingFromRejection(e) {
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try {
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notEnumerableProp(e, "isOperational", true);
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}
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catch(ignore) {}
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}
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function originatesFromRejection(e) {
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if (e == null) return false;
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return ((e instanceof Error["__BluebirdErrorTypes__"].OperationalError) ||
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e["isOperational"] === true);
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}
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function canAttachTrace(obj) {
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return isError(obj) && es5.propertyIsWritable(obj, "stack");
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}
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var ensureErrorObject = (function() {
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if (!("stack" in new Error())) {
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return function(value) {
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if (canAttachTrace(value)) return value;
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try {throw new Error(safeToString(value));}
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catch(err) {return err;}
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};
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} else {
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return function(value) {
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if (canAttachTrace(value)) return value;
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return new Error(safeToString(value));
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};
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}
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})();
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function classString(obj) {
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return {}.toString.call(obj);
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}
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function copyDescriptors(from, to, filter) {
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var keys = es5.names(from);
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for (var i = 0; i < keys.length; ++i) {
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var key = keys[i];
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if (filter(key)) {
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try {
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es5.defineProperty(to, key, es5.getDescriptor(from, key));
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} catch (ignore) {}
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}
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}
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}
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var asArray = function(v) {
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if (es5.isArray(v)) {
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return v;
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}
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return null;
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};
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if (typeof Symbol !== "undefined" && Symbol.iterator) {
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var ArrayFrom = typeof Array.from === "function" ? function(v) {
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return Array.from(v);
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} : function(v) {
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var ret = [];
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var it = v[Symbol.iterator]();
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var itResult;
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while (!((itResult = it.next()).done)) {
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ret.push(itResult.value);
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}
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return ret;
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};
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asArray = function(v) {
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if (es5.isArray(v)) {
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return v;
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} else if (v != null && typeof v[Symbol.iterator] === "function") {
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return ArrayFrom(v);
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}
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return null;
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};
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}
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var isNode = typeof process !== "undefined" &&
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classString(process).toLowerCase() === "[object process]";
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var hasEnvVariables = typeof process !== "undefined" &&
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typeof process.env !== "undefined";
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function env(key) {
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return hasEnvVariables ? process.env[key] : undefined;
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}
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function getNativePromise() {
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if (typeof Promise === "function") {
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try {
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var promise = new Promise(function(){});
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if ({}.toString.call(promise) === "[object Promise]") {
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return Promise;
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}
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} catch (e) {}
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}
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}
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function domainBind(self, cb) {
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return self.bind(cb);
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}
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var ret = {
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isClass: isClass,
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isIdentifier: isIdentifier,
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inheritedDataKeys: inheritedDataKeys,
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getDataPropertyOrDefault: getDataPropertyOrDefault,
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thrower: thrower,
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isArray: es5.isArray,
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asArray: asArray,
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notEnumerableProp: notEnumerableProp,
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isPrimitive: isPrimitive,
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isObject: isObject,
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isError: isError,
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canEvaluate: canEvaluate,
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errorObj: errorObj,
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tryCatch: tryCatch,
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inherits: inherits,
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withAppended: withAppended,
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maybeWrapAsError: maybeWrapAsError,
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toFastProperties: toFastProperties,
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filledRange: filledRange,
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toString: safeToString,
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canAttachTrace: canAttachTrace,
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ensureErrorObject: ensureErrorObject,
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originatesFromRejection: originatesFromRejection,
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markAsOriginatingFromRejection: markAsOriginatingFromRejection,
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classString: classString,
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copyDescriptors: copyDescriptors,
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hasDevTools: typeof chrome !== "undefined" && chrome &&
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typeof chrome.loadTimes === "function",
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isNode: isNode,
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hasEnvVariables: hasEnvVariables,
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env: env,
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global: globalObject,
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getNativePromise: getNativePromise,
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domainBind: domainBind
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};
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ret.isRecentNode = ret.isNode && (function() {
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var version;
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if (process.versions && process.versions.node) {
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version = process.versions.node.split(".").map(Number);
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} else if (process.version) {
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version = process.version.split(".").map(Number);
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}
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return (version[0] === 0 && version[1] > 10) || (version[0] > 0);
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})();
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if (ret.isNode) ret.toFastProperties(process);
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try {throw new Error(); } catch (e) {ret.lastLineError = e;}
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module.exports = ret;
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