1 files changed, 80 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 0000000..08ca510
--- /dev/null
+++ b/node_modules/webpack-sources/lib/CachedSource.js
@@ -0,0 +1,80 @@
+/*
+	MIT License http://www.opensource.org/licenses/mit-license.php
+	Author Tobias Koppers @sokra
+*/
+"use strict";
+
+const Source = require("./Source");
+
+class CachedSource extends Source {
+	constructor(source) {
+		super();
+		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);
+		};
+	}
+
+	source() {
+		if(typeof this._cachedSource !== "undefined") return this._cachedSource;
+		return this._cachedSource = this._source.source();
+	}
+
+	size() {
+		if(typeof this._cachedSize !== "undefined") return this._cachedSize;
+		if(typeof this._cachedSource !== "undefined") {
+			if(Buffer.from.length === 1) return new Buffer(this._cachedSource).length;
+			return this._cachedSize = Buffer.byteLength(this._cachedSource);
+		}
+		return this._cachedSize = this._source.size();
+	}
+
+	sourceAndMap(options) {
+		const 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]
+			};
+		}
+		const result = this._source.sourceAndMap(options);
+		this._cachedSource = result.source;
+		this._cachedMaps[key] = result.map;
+		return {
+			source: this._cachedSource,
+			map: this._cachedMaps[key]
+		};
+	}
+
+	map(options) {
+		if(!options) options = {};
+		const key = JSON.stringify(options);
+		if(key in this._cachedMaps)
+			return this._cachedMaps[key];
+		return this._cachedMaps[key] = this._source.map();
+	}
+
+	updateHash(hash) {
+		this._source.updateHash(hash);
+	}
+}
+
+module.exports = CachedSource;