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6 天以前 a6cdbcfe28fcc40ebb4919f57d60fb20122e8e57

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/*
    MIT License http://www.opensource.org/licenses/mit-license.php
    Author Tobias Koppers @sokra
*/
 
"use strict";
 
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
 */
module.exports.getSourceAndMap = (inputSource, options) => {
    let code = "";
    let mappings = "";
    /** @type {(string | null)[]} */
    const potentialSources = [];
    /** @type {(string | null)[]} */
    const potentialSourcesContent = [];
    /** @type {(string | null)[]} */
    const potentialNames = [];
    const addMapping = createMappingsSerializer(options);
    const { source } = inputSource.streamChunks(
        { ...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 (potentialSources.length < sourceIndex) {
                potentialSources.push(null);
            }
            potentialSources[sourceIndex] = source;
            if (sourceContent !== undefined) {
                while (potentialSourcesContent.length < sourceIndex) {
                    potentialSourcesContent.push(null);
                }
                potentialSourcesContent[sourceIndex] = sourceContent;
            }
        },
        (nameIndex, name) => {
            while (potentialNames.length < nameIndex) {
                potentialNames.push(null);
            }
            potentialNames[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[]} */ (potentialSources),
                        sourcesContent:
                            potentialSourcesContent.length > 0
                                ? /** @type {string[]} */ (potentialSourcesContent)
                                : undefined,
                        names: /** @type {string[]} */ (potentialNames),
                    }
                : null,
    };
};
 
/**
 * @param {SourceLikeWithStreamChunks} source source
 * @param {Options=} options options
 * @returns {RawSourceMap | null} map
 */
module.exports.getMap = (source, options) => {
    let mappings = "";
    /** @type {(string | null)[]} */
    const potentialSources = [];
    /** @type {(string | null)[]} */
    const potentialSourcesContent = [];
    /** @type {(string | null)[]} */
    const potentialNames = [];
    const addMapping = createMappingsSerializer(options);
    source.streamChunks(
        { ...options, source: false, finalSource: true },
        (
            chunk,
            generatedLine,
            generatedColumn,
            sourceIndex,
            originalLine,
            originalColumn,
            nameIndex,
        ) => {
            mappings += addMapping(
                generatedLine,
                generatedColumn,
                sourceIndex,
                originalLine,
                originalColumn,
                nameIndex,
            );
        },
        (sourceIndex, source, sourceContent) => {
            while (potentialSources.length < sourceIndex) {
                potentialSources.push(null);
            }
            potentialSources[sourceIndex] = source;
            if (sourceContent !== undefined) {
                while (potentialSourcesContent.length < sourceIndex) {
                    potentialSourcesContent.push(null);
                }
                potentialSourcesContent[sourceIndex] = sourceContent;
            }
        },
        (nameIndex, name) => {
            while (potentialNames.length < nameIndex) {
                potentialNames.push(null);
            }
            potentialNames[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[]} */ (potentialSources),
                sourcesContent:
                    potentialSourcesContent.length > 0
                        ? /** @type {string[]} */ (potentialSourcesContent)
                        : undefined,
                names: /** @type {string[]} */ (potentialNames),
            }
        : null;
};