0d6fdec4bd
Previously the call to `extractSourceMap()` would only work if the `//#sourceMappingURL ...` was the last line of the file. This doesn't work if the code is JIT evaluated as the comment is actually the last line in the body of a function, wrapped by curly-braces. PR Close #28055
40 lines
1.4 KiB
TypeScript
40 lines
1.4 KiB
TypeScript
/**
|
|
* @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 {SourceMap} from '@angular/compiler';
|
|
const b64 = require('base64-js');
|
|
const SourceMapConsumer = require('source-map').SourceMapConsumer;
|
|
|
|
export interface SourceLocation {
|
|
line: number;
|
|
column: number;
|
|
source: string;
|
|
}
|
|
|
|
export function originalPositionFor(
|
|
sourceMap: SourceMap,
|
|
genPosition: {line: number | null, column: number | null}): SourceLocation {
|
|
const smc = new SourceMapConsumer(sourceMap);
|
|
// Note: We don't return the original object as it also contains a `name` property
|
|
// which is always null and we don't want to include that in our assertions...
|
|
const {line, column, source} = smc.originalPositionFor(genPosition);
|
|
return {line, column, source};
|
|
}
|
|
|
|
export function extractSourceMap(source: string): SourceMap|null {
|
|
let idx = source.lastIndexOf('\n//#');
|
|
if (idx == -1) return null;
|
|
const smComment = source.slice(idx).split('\n', 2)[1].trim();
|
|
const smB64 = smComment.split('sourceMappingURL=data:application/json;base64,')[1];
|
|
return smB64 ? JSON.parse(decodeB64String(smB64)) : null;
|
|
}
|
|
|
|
function decodeB64String(s: string): string {
|
|
return b64.toByteArray(s).reduce((s: string, c: number) => s + String.fromCharCode(c), '');
|
|
}
|