/
lang.ts
470 lines (390 loc) Β· 12.8 KB
/
lang.ts
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// Zones are TC-39 standards-track so users could choose a different implementation
// Rather than import {Zone} from 'zone.js' we define an interface
// so that any library that structurally matches may be used with Angular 2.
export interface ZoneLike {
fork(locals?: any): ZoneLike;
run(fn: any, applyTo?: any, applyWith?: any): any;
}
export interface ZoneLikeConstructor {
longStackTraceZone: { [key: string]: any; };
}
export interface BrowserNodeGlobal {
Object: typeof Object;
Array: typeof Array;
Map: typeof Map;
Set: typeof Set;
Date: DateConstructor;
RegExp: RegExpConstructor;
JSON: typeof JSON;
Math: any; // typeof Math;
assert(condition: any): void;
Reflect: any;
zone: ZoneLike;
Zone: ZoneLikeConstructor;
getAngularTestability: Function;
getAllAngularTestabilities: Function;
frameworkStabilizers: Array<Function>;
setTimeout: Function;
clearTimeout: Function;
setInterval: Function;
clearInterval: Function;
}
// TODO(jteplitz602): Load WorkerGlobalScope from lib.webworker.d.ts file #3492
declare var WorkerGlobalScope;
var globalScope: BrowserNodeGlobal;
if (typeof window === 'undefined') {
if (typeof WorkerGlobalScope !== 'undefined' && self instanceof WorkerGlobalScope) {
// TODO: Replace any with WorkerGlobalScope from lib.webworker.d.ts #3492
globalScope = <any>self;
} else {
globalScope = <any>global;
}
} else {
globalScope = <any>window;
}
export const IS_DART = false;
// Need to declare a new variable for global here since TypeScript
// exports the original value of the symbol.
var _global: BrowserNodeGlobal = globalScope;
export {_global as global};
export var Type = Function;
/**
* Runtime representation a type that a Component or other object is instances of.
*
* An example of a `Type` is `MyCustomComponent` class, which in JavaScript is be represented by
* the `MyCustomComponent` constructor function.
*/
export interface Type extends Function {}
/**
* Runtime representation of a type that is constructable (non-abstract).
*/
export interface ConcreteType extends Type { new (...args): any; }
export function getTypeNameForDebugging(type: Type): string {
return type['name'];
}
export var Math = _global.Math;
export var Date = _global.Date;
var _devMode: boolean = true;
var _modeLocked: boolean = false;
export function lockMode() {
_modeLocked = true;
}
/**
* Disable Angular's development mode, which turns off assertions and other
* checks within the framework.
*
* One important assertion this disables verifies that a change detection pass
* does not result in additional changes to any bindings (also known as
* unidirectional data flow).
*/
export function enableProdMode() {
if (_modeLocked) {
// Cannot use BaseException as that ends up importing from facade/lang.
throw 'Cannot enable prod mode after platform setup.';
}
_devMode = false;
}
export function assertionsEnabled(): boolean {
return _devMode;
}
// TODO: remove calls to assert in production environment
// Note: Can't just export this and import in in other files
// as `assert` is a reserved keyword in Dart
_global.assert = function assert(condition) {
// TODO: to be fixed properly via #2830, noop for now
};
// This function is needed only to properly support Dart's const expressions
// see https://github.com/angular/ts2dart/pull/151 for more info
export function CONST_EXPR<T>(expr: T): T {
return expr;
}
export function CONST(): ClassDecorator & PropertyDecorator {
return (target) => target;
}
export function isPresent(obj: any): boolean {
return obj !== undefined && obj !== null;
}
export function isBlank(obj: any): boolean {
return obj === undefined || obj === null;
}
export function isString(obj: any): boolean {
return typeof obj === "string";
}
export function isFunction(obj: any): boolean {
return typeof obj === "function";
}
export function isType(obj: any): boolean {
return isFunction(obj);
}
export function isStringMap(obj: any): boolean {
return typeof obj === 'object' && obj !== null;
}
export function isPromise(obj: any): boolean {
return obj instanceof (<any>_global).Promise;
}
export function isArray(obj: any): boolean {
return Array.isArray(obj);
}
export function isNumber(obj): boolean {
return typeof obj === 'number';
}
export function isDate(obj): boolean {
return obj instanceof Date && !isNaN(obj.valueOf());
}
export function noop() {}
export function stringify(token): string {
if (typeof token === 'string') {
return token;
}
if (token === undefined || token === null) {
return '' + token;
}
if (token.name) {
return token.name;
}
if (token.overriddenName) {
return token.overriddenName;
}
var res = token.toString();
var newLineIndex = res.indexOf("\n");
return (newLineIndex === -1) ? res : res.substring(0, newLineIndex);
}
// serialize / deserialize enum exist only for consistency with dart API
// enums in typescript don't need to be serialized
export function serializeEnum(val): number {
return val;
}
export function deserializeEnum(val, values: Map<number, any>): any {
return val;
}
export class StringWrapper {
static fromCharCode(code: number): string { return String.fromCharCode(code); }
static charCodeAt(s: string, index: number): number { return s.charCodeAt(index); }
static split(s: string, regExp: RegExp): string[] { return s.split(regExp); }
static equals(s: string, s2: string): boolean { return s === s2; }
static stripLeft(s: string, charVal: string): string {
if (s && s.length) {
var pos = 0;
for (var i = 0; i < s.length; i++) {
if (s[i] != charVal) break;
pos++;
}
s = s.substring(pos);
}
return s;
}
static stripRight(s: string, charVal: string): string {
if (s && s.length) {
var pos = s.length;
for (var i = s.length - 1; i >= 0; i--) {
if (s[i] != charVal) break;
pos--;
}
s = s.substring(0, pos);
}
return s;
}
static replace(s: string, from: string, replace: string): string {
return s.replace(from, replace);
}
static replaceAll(s: string, from: RegExp, replace: string): string {
return s.replace(from, replace);
}
static slice<T>(s: string, from: number = 0, to: number = null): string {
return s.slice(from, to === null ? undefined : to);
}
static replaceAllMapped(s: string, from: RegExp, cb: Function): string {
return s.replace(from, function(...matches) {
// Remove offset & string from the result array
matches.splice(-2, 2);
// The callback receives match, p1, ..., pn
return cb(matches);
});
}
static contains(s: string, substr: string): boolean { return s.indexOf(substr) != -1; }
static compare(a: string, b: string): number {
if (a < b) {
return -1;
} else if (a > b) {
return 1;
} else {
return 0;
}
}
}
export class StringJoiner {
constructor(public parts = []) {}
add(part: string): void { this.parts.push(part); }
toString(): string { return this.parts.join(""); }
}
export class NumberParseError extends Error {
name: string;
constructor(public message: string) { super(); }
toString(): string { return this.message; }
}
export class NumberWrapper {
static toFixed(n: number, fractionDigits: number): string { return n.toFixed(fractionDigits); }
static equal(a: number, b: number): boolean { return a === b; }
static parseIntAutoRadix(text: string): number {
var result: number = parseInt(text);
if (isNaN(result)) {
throw new NumberParseError("Invalid integer literal when parsing " + text);
}
return result;
}
static parseInt(text: string, radix: number): number {
if (radix == 10) {
if (/^(\-|\+)?[0-9]+$/.test(text)) {
return parseInt(text, radix);
}
} else if (radix == 16) {
if (/^(\-|\+)?[0-9ABCDEFabcdef]+$/.test(text)) {
return parseInt(text, radix);
}
} else {
var result: number = parseInt(text, radix);
if (!isNaN(result)) {
return result;
}
}
throw new NumberParseError("Invalid integer literal when parsing " + text + " in base " +
radix);
}
// TODO: NaN is a valid literal but is returned by parseFloat to indicate an error.
static parseFloat(text: string): number { return parseFloat(text); }
static get NaN(): number { return NaN; }
static isNaN(value: any): boolean { return isNaN(value); }
static isInteger(value: any): boolean { return Number.isInteger(value); }
}
export var RegExp = _global.RegExp;
export class RegExpWrapper {
static create(regExpStr: string, flags: string = ''): RegExp {
flags = flags.replace(/g/g, '');
return new _global.RegExp(regExpStr, flags + 'g');
}
static firstMatch(regExp: RegExp, input: string): RegExpExecArray {
// Reset multimatch regex state
regExp.lastIndex = 0;
return regExp.exec(input);
}
static test(regExp: RegExp, input: string): boolean {
regExp.lastIndex = 0;
return regExp.test(input);
}
static matcher(regExp: RegExp, input: string): {
re: RegExp;
input: string
}
{
// Reset regex state for the case
// someone did not loop over all matches
// last time.
regExp.lastIndex = 0;
return {re: regExp, input: input};
}
}
export class RegExpMatcherWrapper {
static next(matcher: {
re: RegExp;
input: string
}): RegExpExecArray {
return matcher.re.exec(matcher.input);
}
}
export class FunctionWrapper {
static apply(fn: Function, posArgs: any): any { return fn.apply(null, posArgs); }
}
// JS has NaN !== NaN
export function looseIdentical(a, b): boolean {
return a === b || typeof a === "number" && typeof b === "number" && isNaN(a) && isNaN(b);
}
// JS considers NaN is the same as NaN for map Key (while NaN !== NaN otherwise)
// see https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Map
export function getMapKey<T>(value: T): T {
return value;
}
export function normalizeBlank(obj: Object): any {
return isBlank(obj) ? null : obj;
}
export function normalizeBool(obj: boolean): boolean {
return isBlank(obj) ? false : obj;
}
export function isJsObject(o: any): boolean {
return o !== null && (typeof o === "function" || typeof o === "object");
}
export function print(obj: Error | Object) {
console.log(obj);
}
// Can't be all uppercase as our transpiler would think it is a special directive...
export class Json {
static parse(s: string): Object { return _global.JSON.parse(s); }
static stringify(data: Object): string {
// Dart doesn't take 3 arguments
return _global.JSON.stringify(data, null, 2);
}
}
export class DateWrapper {
static create(year: number, month: number = 1, day: number = 1, hour: number = 0,
minutes: number = 0, seconds: number = 0, milliseconds: number = 0): Date {
return new Date(year, month - 1, day, hour, minutes, seconds, milliseconds);
}
static fromISOString(str: string): Date { return new Date(str); }
static fromMillis(ms: number): Date { return new Date(ms); }
static toMillis(date: Date): number { return date.getTime(); }
static now(): Date { return new Date(); }
static toJson(date: Date): string { return date.toJSON(); }
}
export function setValueOnPath(global: any, path: string, value: any) {
var parts = path.split('.');
var obj: any = global;
while (parts.length > 1) {
var name = parts.shift();
if (obj.hasOwnProperty(name) && isPresent(obj[name])) {
obj = obj[name];
} else {
obj = obj[name] = {};
}
}
if (obj === undefined || obj === null) {
obj = {};
}
obj[parts.shift()] = value;
}
// When Symbol.iterator doesn't exist, retrieves the key used in es6-shim
declare var Symbol;
var _symbolIterator = null;
export function getSymbolIterator(): string | symbol {
if (isBlank(_symbolIterator)) {
if (isPresent(Symbol) && isPresent(Symbol.iterator)) {
_symbolIterator = Symbol.iterator;
} else {
// es6-shim specific logic
var keys = Object.getOwnPropertyNames(Map.prototype);
for (var i = 0; i < keys.length; ++i) {
var key = keys[i];
if (key !== 'entries' && key !== 'size' &&
Map.prototype[key] === Map.prototype['entries']) {
_symbolIterator = key;
}
}
}
}
return _symbolIterator;
}
export function evalExpression(sourceUrl: string, expr: string, declarations: string,
vars: {[key: string]: any}): any {
var fnBody = `${declarations}\nreturn ${expr}\n//# sourceURL=${sourceUrl}`;
var fnArgNames = [];
var fnArgValues = [];
for (var argName in vars) {
fnArgNames.push(argName);
fnArgValues.push(vars[argName]);
}
return new Function(...fnArgNames.concat(fnBody))(...fnArgValues);
}
export function isPrimitive(obj: any): boolean {
return !isJsObject(obj);
}
export function hasConstructor(value: Object, type: Type): boolean {
return value.constructor === type;
}