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build/node_modules/webpack-core/lib/PrefixSource.js

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+/*
+	MIT License http://www.opensource.org/licenses/mit-license.php
+	Author Tobias Koppers @sokra
+*/
+var Source = require("./Source");
+var SourceNode = require("source-map").SourceNode;
+
+function PrefixSource(prefix, source) {
+	Source.call(this);
+	this._source = source;
+	this._prefix = prefix;
+}
+module.exports = PrefixSource;
+
+PrefixSource.prototype = Object.create(Source.prototype);
+PrefixSource.prototype.constructor = PrefixSource;
+
+PrefixSource.prototype.source = function() {
+	var node = typeof this._source === "string" ? this._source : this._source.source();
+	var prefix = this._prefix;
+	return prefix + node.replace(/\n(.)/g, "\n" + prefix + "$1");
+};
+
+require("./SourceAndMapMixin")(PrefixSource.prototype);
+
+PrefixSource.prototype.node = function(options) {
+	var node = this._source.node(options);
+	var append = [this._prefix];
+	return new SourceNode(null, null, null, [
+		cloneAndPrefix(node, this._prefix, append)
+	]);
+};
+
+PrefixSource.prototype.listMap = function(options) {
+	var prefix = this._prefix;
+	var map = this._source.listMap(options);
+	map.mapGeneratedCode(function(code) {
+		return prefix + code.replace(/\n(.)/g, "\n" + prefix + "$1");
+	});
+	return map;
+};
+
+PrefixSource.prototype.updateHash = function(hash) {
+	if(typeof this._source === "string")
+		hash.update(this._source);
+	else
+		this._source.updateHash(hash);
+	if(typeof this._prefix === "string")
+		hash.update(this._prefix);
+	else
+		this._prefix.updateHash(hash);
+};
+
+function cloneAndPrefix(node, prefix, append) {
+	if(typeof node === "string") {
+		var result = node.replace(/\n(.)/g, "\n" + prefix + "$1");
+		if(append.length > 0) result = append.pop() + result;
+		if(/\n$/.test(node)) append.push(prefix);
+		return result;
+	} else {
+		var newNode = new SourceNode(
+			node.line,
+			node.column,
+			node.source,
+			node.children.map(function(node) {
+				return cloneAndPrefix(node, prefix, append);
+			}),
+			node.name
+		);
+		newNode.sourceContents = node.sourceContents;
+		return newNode;
+	}
+};