webpack-sources
Version:
Source code handling classes for webpack
160 lines (153 loc) • 4.17 kB
JavaScript
/*
MIT License http://www.opensource.org/licenses/mit-license.php
Author Tobias Koppers @sokra
*/
;
const createMappingsSerializer = require("./createMappingsSerializer");
/** @typedef {import("../Source").RawSourceMap} RawSourceMap */
/** @typedef {import("../Source").SourceAndMap} SourceAndMap */
/** @typedef {import("./streamChunks").Options} Options */
/** @typedef {import("./streamChunks").StreamChunksFunction} StreamChunksFunction */
/** @typedef {{ streamChunks: StreamChunksFunction }} SourceLikeWithStreamChunks */
/**
* @param {SourceLikeWithStreamChunks} inputSource input source
* @param {Options=} options options
* @returns {SourceAndMap} map
*/
exports.getSourceAndMap = (inputSource, options) => {
let code = "";
let mappings = "";
/** @type {(string | null)[]} */
let sources = [];
/** @type {(string | null)[]} */
let sourcesContent = [];
/** @type {(string | null)[]} */
let names = [];
const addMapping = createMappingsSerializer(options);
const { source } = inputSource.streamChunks(
Object.assign({}, options, { finalSource: true }),
(
chunk,
generatedLine,
generatedColumn,
sourceIndex,
originalLine,
originalColumn,
nameIndex
) => {
if (chunk !== undefined) code += chunk;
mappings += addMapping(
generatedLine,
generatedColumn,
sourceIndex,
originalLine,
originalColumn,
nameIndex
);
},
(sourceIndex, source, sourceContent) => {
while (sources.length < sourceIndex) {
sources.push(null);
}
sources[sourceIndex] = source;
if (sourceContent !== undefined) {
while (sourcesContent.length < sourceIndex) {
sourcesContent.push(null);
}
sourcesContent[sourceIndex] = sourceContent;
}
},
(nameIndex, name) => {
while (names.length < nameIndex) {
names.push(null);
}
names[nameIndex] = name;
}
);
return {
source: source !== undefined ? source : code,
map:
mappings.length > 0
? {
version: 3,
file: "x",
mappings,
// We handle broken sources as `null`, in spec this field should be string, but no information what we should do in such cases if we change type it will be breaking change
sources: /** @type {string[]} */ (sources),
sourcesContent:
sourcesContent.length > 0
? /** @type {string[]} */ (sourcesContent)
: undefined,
names: /** @type {string[]} */ (names)
}
: null
};
};
/**
* @param {SourceLikeWithStreamChunks} source source
* @param {Options=} options options
* @returns {RawSourceMap | null} map
*/
exports.getMap = (source, options) => {
let mappings = "";
/** @type {(string | null)[]} */
let sources = [];
/** @type {(string | null)[]} */
let sourcesContent = [];
/** @type {(string | null)[]} */
let names = [];
const addMapping = createMappingsSerializer(options);
source.streamChunks(
Object.assign({}, options, { source: false, finalSource: true }),
(
chunk,
generatedLine,
generatedColumn,
sourceIndex,
originalLine,
originalColumn,
nameIndex
) => {
mappings += addMapping(
generatedLine,
generatedColumn,
sourceIndex,
originalLine,
originalColumn,
nameIndex
);
},
(sourceIndex, source, sourceContent) => {
while (sources.length < sourceIndex) {
sources.push(null);
}
sources[sourceIndex] = source;
if (sourceContent !== undefined) {
while (sourcesContent.length < sourceIndex) {
sourcesContent.push(null);
}
sourcesContent[sourceIndex] = sourceContent;
}
},
(nameIndex, name) => {
while (names.length < nameIndex) {
names.push(null);
}
names[nameIndex] = name;
}
);
return mappings.length > 0
? {
version: 3,
file: "x",
mappings,
// We handle broken sources as `null`, in spec this field should be string, but no information what we should do in such cases if we change type it will be breaking change
sources: /** @type {string[]} */ (sources),
sourcesContent:
sourcesContent.length > 0
? /** @type {string[]} */ (sourcesContent)
: undefined,
names: /** @type {string[]} */ (names)
}
: null;
};