1 files changed, 70 insertions, 0 deletions
diff --git a/node_modules/webpack-sources/lib/CachedSource.js b/node_modules/webpack-sources/lib/CachedSource.js
new file mode 100644
index 000000000..50732aebd
--- /dev/null
+++ b/node_modules/webpack-sources/lib/CachedSource.js
@@ -0,0 +1,70 @@
+/*
+	MIT License http://www.opensource.org/licenses/mit-license.php
+	Author Tobias Koppers @sokra
+*/
+function CachedSource(source) {
+	this._source = source;
+	this._cachedSource = undefined;
+	this._cachedSize = undefined;
+	this._cachedMaps = {};
+
+	if(source.node) this.node = function(options) {
+		return this._source.node(options);
+	};
+
+	if(source.listMap) this.listMap = function(options) {
+		return this._source.listMap(options);
+	};
+}
+module.exports = CachedSource;
+
+CachedSource.prototype.source = function() {
+	if(typeof this._cachedSource !== "undefined") return this._cachedSource;
+	return this._cachedSource = this._source.source();
+};
+
+CachedSource.prototype.size = function() {
+	if(typeof this._cachedSize !== "undefined") return this._cachedSize;
+	if(typeof this._cachedSource !== "undefined")
+		return this._cachedSize = this._cachedSource.length;
+	return this._cachedSize = this._source.size();
+};
+
+CachedSource.prototype.sourceAndMap = function(options) {
+	var key = JSON.stringify(options);
+	if(typeof this._cachedSource !== "undefined" && key in this._cachedMaps)
+		return {
+			source: this._cachedSource,
+			map: this._cachedMaps[key]
+		};
+	else if(typeof this._cachedSource !== "undefined") {
+		return {
+			source: this._cachedSource,
+			map: this._cachedMaps[key] = this._source.map(options)
+		};
+	} else if(key in this._cachedMaps) {
+		return {
+			source: this._cachedSource = this._source.source(),
+			map: this._cachedMaps[key]
+		};
+	}
+	var result = this._source.sourceAndMap(options);
+	this._cachedSource = result.source;
+	this._cachedMaps[key] = result.map;
+	return {
+		source: this._cachedSource,
+		map: this._cachedMaps[key]
+	};
+};
+
+CachedSource.prototype.map = function(options) {
+	if(!options) options = {};
+	var key = JSON.stringify(options);
+	if(key in this._cachedMaps)
+		return this._cachedMaps[key];
+	return this._cachedMaps[key] = this._source.map();
+};
+
+CachedSource.prototype.updateHash = function(hash) {
+	this._source.updateHash(hash);
+};