feat: initial commit

node_modules/webpack-sources/lib/PrefixSource.js

@@ -0,0 +1,114 @@
+/*
+	MIT License http://www.opensource.org/licenses/mit-license.php
+	Author Tobias Koppers @sokra
+*/
+"use strict";
+
+const Source = require("./Source");
+const RawSource = require("./RawSource");
+const streamChunks = require("./helpers/streamChunks");
+const { getMap, getSourceAndMap } = require("./helpers/getFromStreamChunks");
+
+const REPLACE_REGEX = /\n(?=.|\s)/g;
+
+class PrefixSource extends Source {
+	constructor(prefix, source) {
+		super();
+		this._source =
+			typeof source === "string" || Buffer.isBuffer(source)
+				? new RawSource(source, true)
+				: source;
+		this._prefix = prefix;
+	}
+
+	getPrefix() {
+		return this._prefix;
+	}
+
+	original() {
+		return this._source;
+	}
+
+	source() {
+		const node = this._source.source();
+		const prefix = this._prefix;
+		return prefix + node.replace(REPLACE_REGEX, "\n" + prefix);
+	}
+
+	// TODO efficient buffer() implementation
+
+	map(options) {
+		return getMap(this, options);
+	}
+
+	sourceAndMap(options) {
+		return getSourceAndMap(this, options);
+	}
+
+	streamChunks(options, onChunk, onSource, onName) {
+		const prefix = this._prefix;
+		const prefixOffset = prefix.length;
+		const linesOnly = !!(options && options.columns === false);
+		const { generatedLine, generatedColumn, source } = streamChunks(
+			this._source,
+			options,
+			(
+				chunk,
+				generatedLine,
+				generatedColumn,
+				sourceIndex,
+				originalLine,
+				originalColumn,
+				nameIndex
+			) => {
+				if (generatedColumn !== 0) {
+					// In the middle of the line, we just adject the column
+					generatedColumn += prefixOffset;
+				} else if (chunk !== undefined) {
+					// At the start of the line, when we have source content
+					// add the prefix as generated mapping
+					// (in lines only mode we just add it to the original mapping
+					// for performance reasons)
+					if (linesOnly || sourceIndex < 0) {
+						chunk = prefix + chunk;
+					} else if (prefixOffset > 0) {
+						onChunk(prefix, generatedLine, generatedColumn, -1, -1, -1, -1);
+						generatedColumn += prefixOffset;
+					}
+				} else if (!linesOnly) {
+					// Without source content, we only need to adject the column info
+					// expect in lines only mode where prefix is added to original mapping
+					generatedColumn += prefixOffset;
+				}
+				onChunk(
+					chunk,
+					generatedLine,
+					generatedColumn,
+					sourceIndex,
+					originalLine,
+					originalColumn,
+					nameIndex
+				);
+			},
+			onSource,
+			onName
+		);
+		return {
+			generatedLine,
+			generatedColumn:
+				generatedColumn === 0 ? 0 : prefixOffset + generatedColumn,
+			source:
+				source !== undefined
+					? prefix + source.replace(REPLACE_REGEX, "\n" + prefix)
+					: undefined
+		};
+	}
+
+	updateHash(hash) {
+		hash.update("PrefixSource");
+		this._source.updateHash(hash);
+		hash.update(this._prefix);
+	}
+}
+
+module.exports = PrefixSource;