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node_modules/webpack-sources/lib/helpers/streamAndGetSourceAndMap.js

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+/*
+	MIT License http://www.opensource.org/licenses/mit-license.php
+	Author Tobias Koppers @sokra
+*/
+
+"use strict";
+
+const createMappingsSerializer = require("./createMappingsSerializer");
+const streamChunks = require("./streamChunks");
+
+const streamAndGetSourceAndMap = (
+	inputSource,
+	options,
+	onChunk,
+	onSource,
+	onName
+) => {
+	let code = "";
+	let mappings = "";
+	let sources = [];
+	let sourcesContent = [];
+	let names = [];
+	const addMapping = createMappingsSerializer(
+		Object.assign({}, options, { columns: true })
+	);
+	const finalSource = !!(options && options.finalSource);
+	const { generatedLine, generatedColumn, source } = streamChunks(
+		inputSource,
+		options,
+		(
+			chunk,
+			generatedLine,
+			generatedColumn,
+			sourceIndex,
+			originalLine,
+			originalColumn,
+			nameIndex
+		) => {
+			if (chunk !== undefined) code += chunk;
+			mappings += addMapping(
+				generatedLine,
+				generatedColumn,
+				sourceIndex,
+				originalLine,
+				originalColumn,
+				nameIndex
+			);
+			return onChunk(
+				finalSource ? undefined : chunk,
+				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;
+			}
+			return onSource(sourceIndex, source, sourceContent);
+		},
+		(nameIndex, name) => {
+			while (names.length < nameIndex) {
+				names.push(null);
+			}
+			names[nameIndex] = name;
+			return onName(nameIndex, name);
+		}
+	);
+	const resultSource = source !== undefined ? source : code;
+	return {
+		result: {
+			generatedLine,
+			generatedColumn,
+			source: finalSource ? resultSource : undefined
+		},
+		source: resultSource,
+		map:
+			mappings.length > 0
+				? {
+						version: 3,
+						file: "x",
+						mappings,
+						sources,
+						sourcesContent:
+							sourcesContent.length > 0 ? sourcesContent : undefined,
+						names
+				  }
+				: null
+	};
+};
+
+module.exports = streamAndGetSourceAndMap;