From de98e0b232509d5f40c135d540a70e415272ff85 Mon Sep 17 00:00:00 2001
From: Florian Dold <florian.dold@gmail.com>
Date: Wed, 3 May 2017 15:35:00 +0200
Subject: node_modules

---
 .../lib/reader/input-source-map-tracker.js         | 54 ++++++++++++++++++++++
 1 file changed, 54 insertions(+)
 create mode 100644 node_modules/clean-css/lib/reader/input-source-map-tracker.js

(limited to 'node_modules/clean-css/lib/reader/input-source-map-tracker.js')

diff --git a/node_modules/clean-css/lib/reader/input-source-map-tracker.js b/node_modules/clean-css/lib/reader/input-source-map-tracker.js
new file mode 100644
index 000000000..ea2c03467
--- /dev/null
+++ b/node_modules/clean-css/lib/reader/input-source-map-tracker.js
@@ -0,0 +1,54 @@
+var SourceMapConsumer = require('source-map').SourceMapConsumer;
+
+function inputSourceMapTracker() {
+  var maps = {};
+
+  return {
+    all: all.bind(null, maps),
+    isTracking: isTracking.bind(null, maps),
+    originalPositionFor: originalPositionFor.bind(null, maps),
+    track: track.bind(null, maps)
+  };
+}
+
+function all(maps) {
+  return maps;
+}
+
+function isTracking(maps, source) {
+  return source in maps;
+}
+
+function originalPositionFor(maps, metadata, range, selectorFallbacks) {
+  var line = metadata[0];
+  var column = metadata[1];
+  var source = metadata[2];
+  var position = {
+    line: line,
+    column: column + range
+  };
+  var originalPosition;
+
+  while (!originalPosition && position.column > column) {
+    position.column--;
+    originalPosition = maps[source].originalPositionFor(position);
+  }
+
+  if (originalPosition.line === null && line > 1 && selectorFallbacks > 0) {
+    return originalPositionFor(maps, [line - 1, column, source], range, selectorFallbacks - 1);
+  }
+
+  return originalPosition.line !== null ?
+    toMetadata(originalPosition) :
+    metadata;
+}
+
+function toMetadata(asHash) {
+  return [asHash.line, asHash.column, asHash.source];
+}
+
+function track(maps, source, data) {
+  maps[source] = new SourceMapConsumer(data);
+}
+
+module.exports = inputSourceMapTracker;
-- 
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