Embed source file content in source map

Depends on latest css-stringify git master

Author: conradz

lib/source-map-support.js

@@ -50,9 +50,11 @@ exports.updatePosition = function(str) {
  */
 
 exports.emit = function(str, pos, startOnly) {
+  var sourceFile = pos && pos.source || 'source.css';
+
   if (pos && pos.start) {
     this.map.addMapping({
-      source: pos.source || 'source.css',
+      source: sourceFile,
       generated: {
         line: this.position.line,
         column: Math.max(this.position.column - 1, 0)
@@ -62,13 +64,15 @@ exports.emit = function(str, pos, startOnly) {
         column: pos.start.column - 1
       }
     });
+
+    this.map.setSourceContent(sourceFile, pos.content || '');
   }
 
   this.updatePosition(str);
 
   if (!startOnly && pos && pos.end) {
     this.map.addMapping({
-      source: pos.source || 'source.css',
+      source: sourceFile,
       generated: {
         line: this.position.line,
         column: Math.max(this.position.column - 1, 0)
@@ -78,6 +82,8 @@ exports.emit = function(str, pos, startOnly) {
         column: pos.end.column - 1
       }
     });
+
+    this.map.setSourceContent(sourceFile, pos.content || '');
   }
 
   return str;

test/css-stringify.js

@@ -54,6 +54,7 @@ describe('stringify(obj, {sourcemap: true})', function(){
     map.originalPositionFor({ line: 11, column: 0 }).should.eql(locs.mediaBlock);
     map.originalPositionFor({ line: 12, column: 2 }).should.eql(locs.mediaOnly);
     map.originalPositionFor({ line: 17, column: 0 }).should.eql(locs.comment);
+    map.sourceContentFor('rules.css').should.eql(src);
   });
 
   it('should generate source maps alongside when using compress compiler', function(){
@@ -66,5 +67,6 @@ describe('stringify(obj, {sourcemap: true})', function(){
     map.originalPositionFor({ line: 1, column: 10 }).should.eql(locs.tobiNameValue);
     map.originalPositionFor({ line: 1, column: 50 }).should.eql(locs.mediaBlock);
     map.originalPositionFor({ line: 1, column: 64 }).should.eql(locs.mediaOnly);
+    map.sourceContentFor('rules.css').should.eql(src);
   });
 });