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165 lines (135 loc) · 5.43 KB
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/**
* @license
* Copyright Google Inc. All Rights Reserved.
*
* Use of this source code is governed by an MIT-style license that can be
* found in the LICENSE file at https://angular.io/license
*/
import {ɵisPromise as isPromise} from '@angular/core';
import * as o from './output/output_ast';
import {ParseError} from './parse_util';
export const MODULE_SUFFIX = '';
const CAMEL_CASE_REGEXP = /([A-Z])/g;
const DASH_CASE_REGEXP = /-+([a-z0-9])/g;
export function camelCaseToDashCase(input: string): string {
return input.replace(CAMEL_CASE_REGEXP, (...m: any[]) => '-' + m[1].toLowerCase());
}
export function dashCaseToCamelCase(input: string): string {
return input.replace(DASH_CASE_REGEXP, (...m: any[]) => m[1].toUpperCase());
}
export function splitAtColon(input: string, defaultValues: string[]): string[] {
return _splitAt(input, ':', defaultValues);
}
export function splitAtPeriod(input: string, defaultValues: string[]): string[] {
return _splitAt(input, '.', defaultValues);
}
function _splitAt(input: string, character: string, defaultValues: string[]): string[] {
const characterIndex = input.indexOf(character);
if (characterIndex == -1) return defaultValues;
return [input.slice(0, characterIndex).trim(), input.slice(characterIndex + 1).trim()];
}
export function visitValue(value: any, visitor: ValueVisitor, context: any): any {
if (Array.isArray(value)) {
return visitor.visitArray(<any[]>value, context);
}
if (isStrictStringMap(value)) {
return visitor.visitStringMap(<{[key: string]: any}>value, context);
}
if (value == null || typeof value == 'string' || typeof value == 'number' ||
typeof value == 'boolean') {
return visitor.visitPrimitive(value, context);
}
return visitor.visitOther(value, context);
}
export function isDefined(val: any): boolean {
return val !== null && val !== undefined;
}
export function noUndefined<T>(val: T | undefined): T {
return val === undefined ? null ! : val;
}
export interface ValueVisitor {
visitArray(arr: any[], context: any): any;
visitStringMap(map: {[key: string]: any}, context: any): any;
visitPrimitive(value: any, context: any): any;
visitOther(value: any, context: any): any;
}
export class ValueTransformer implements ValueVisitor {
visitArray(arr: any[], context: any): any {
return arr.map(value => visitValue(value, this, context));
}
visitStringMap(map: {[key: string]: any}, context: any): any {
const result: {[key: string]: any} = {};
Object.keys(map).forEach(key => { result[key] = visitValue(map[key], this, context); });
return result;
}
visitPrimitive(value: any, context: any): any { return value; }
visitOther(value: any, context: any): any { return value; }
}
export type SyncAsync<T> = T | Promise<T>;
export const SyncAsync = {
assertSync: <T>(value: SyncAsync<T>): T => {
if (isPromise(value)) {
throw new Error(`Illegal state: value cannot be a promise`);
}
return value;
},
then: <T, R>(value: SyncAsync<T>, cb: (value: T) => R | Promise<R>| SyncAsync<R>):
SyncAsync<R> => { return isPromise(value) ? value.then(cb) : cb(value);},
all: <T>(syncAsyncValues: SyncAsync<T>[]): SyncAsync<T[]> => {
return syncAsyncValues.some(isPromise) ? Promise.all(syncAsyncValues) : syncAsyncValues as T[];
}
};
export function syntaxError(msg: string, parseErrors?: ParseError[]): Error {
const error = Error(msg);
(error as any)[ERROR_SYNTAX_ERROR] = true;
if (parseErrors) (error as any)[ERROR_PARSE_ERRORS] = parseErrors;
return error;
}
const ERROR_SYNTAX_ERROR = 'ngSyntaxError';
const ERROR_PARSE_ERRORS = 'ngParseErrors';
export function isSyntaxError(error: Error): boolean {
return (error as any)[ERROR_SYNTAX_ERROR];
}
export function getParseErrors(error: Error): ParseError[] {
return (error as any)[ERROR_PARSE_ERRORS] || [];
}
export function escapeRegExp(s: string): string {
return s.replace(/([.*+?^=!:${}()|[\]\/\\])/g, '\\$1');
}
const STRING_MAP_PROTO = Object.getPrototypeOf({});
function isStrictStringMap(obj: any): boolean {
return typeof obj === 'object' && obj !== null && Object.getPrototypeOf(obj) === STRING_MAP_PROTO;
}
export function utf8Encode(str: string): string {
let encoded = '';
for (let index = 0; index < str.length; index++) {
let codePoint = str.charCodeAt(index);
// decode surrogate
// see https://mathiasbynens.be/notes/javascript-encoding#surrogate-formulae
if (codePoint >= 0xd800 && codePoint <= 0xdbff && str.length > (index + 1)) {
const low = str.charCodeAt(index + 1);
if (low >= 0xdc00 && low <= 0xdfff) {
index++;
codePoint = ((codePoint - 0xd800) << 10) + low - 0xdc00 + 0x10000;
}
}
if (codePoint <= 0x7f) {
encoded += String.fromCharCode(codePoint);
} else if (codePoint <= 0x7ff) {
encoded += String.fromCharCode(((codePoint >> 6) & 0x1F) | 0xc0, (codePoint & 0x3f) | 0x80);
} else if (codePoint <= 0xffff) {
encoded += String.fromCharCode(
(codePoint >> 12) | 0xe0, ((codePoint >> 6) & 0x3f) | 0x80, (codePoint & 0x3f) | 0x80);
} else if (codePoint <= 0x1fffff) {
encoded += String.fromCharCode(
((codePoint >> 18) & 0x07) | 0xf0, ((codePoint >> 12) & 0x3f) | 0x80,
((codePoint >> 6) & 0x3f) | 0x80, (codePoint & 0x3f) | 0x80);
}
}
return encoded;
}
export interface OutputContext {
genFilePath: string;
statements: o.Statement[];
importExpr(reference: any, typeParams?: o.Type[]|null): o.Expression;
}