add media compression support

Author: tj

examples/keyframes.css

@@ -1,10 +1,10 @@
-@-webkit-keyframes fade {
+@keyframes fade {
   from {
     opacity: 0;
-    foo: 'bar';
+    opacity: 1
   }
+
   to {
-    opacity: 1;
-    bar: 'baz';
+    opacity: 1
   }
 }

examples/keyframes.js

@@ -9,4 +9,4 @@ var parse = require('css-parse')
   , read = fs.readFileSync
   , css = read('examples/keyframes.css', 'utf8');
 
-console.log(stringify(parse(css), { compress: false }));
+console.log(stringify(parse(css), { compress: true }));

index.js

@@ -58,6 +58,15 @@ Compiler.prototype.import = function(node){
 
 Compiler.prototype.media = function(node){
   var self = this;
+
+  if (this.compress) {
+    return '@media '
+      + node.media
+      + '{'
+      + node.rules.map(this.visit.bind(this)).join('')
+      + '}';
+  }
+
   return '@media '
     + node.media
     + ' {\n'

test/css-parse.js

@@ -12,12 +12,14 @@ var stringify = require('..')
 
 describe('stringify(obj)', function(){
   readdir('test/cases').forEach(function(file){
-    if (~file.indexOf('css')) return;
-    file = path.basename(file, '.json');
+    var compress = ~file.indexOf('compress');
+    if (~file.indexOf('json')) return;
+    file = path.basename(file, '.css');
     it('should stringify ' + file, function(){
       var css = read(path.join('test', 'cases', file + '.css'), 'utf8');
+      if (compress) file = file.replace('.compress', '');
       var json = read(path.join('test', 'cases', file + '.json'), 'utf8');
-      var ret = stringify(parse(css));
+      var ret = stringify(parse(css), { compress: compress });
       ret.should.equal(css);
     })
   });