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1 files changed, 42 insertions, 0 deletions

diff --git a/node_modules/csso/lib/compressor/restructure/3-disjoinRuleset.js b/node_modules/csso/lib/compressor/restructure/3-disjoinRuleset.js
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index 00000000..6df4f807
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+++ b/node_modules/csso/lib/compressor/restructure/3-disjoinRuleset.js
@@ -0,0 +1,42 @@
+var List = require('../../utils/list.js');
+var walkRulesRight = require('../../utils/walk.js').rulesRight;
+
+function processRuleset(node, item, list) {
+    var selectors = node.selector.selectors;
+
+    // generate new rule sets:
+    // .a, .b { color: red; }
+    // ->
+    // .a { color: red; }
+    // .b { color: red; }
+
+    // while there are more than 1 simple selector split for rulesets
+    while (selectors.head !== selectors.tail) {
+        var newSelectors = new List();
+        newSelectors.insert(selectors.remove(selectors.head));
+
+        list.insert(list.createItem({
+            type: 'Ruleset',
+            info: node.info,
+            pseudoSignature: node.pseudoSignature,
+            selector: {
+                type: 'Selector',
+                info: node.selector.info,
+                selectors: newSelectors
+            },
+            block: {
+                type: 'Block',
+                info: node.block.info,
+                declarations: node.block.declarations.copy()
+            }
+        }), item);
+    }
+};
+
+module.exports = function disjoinRuleset(ast) {
+    walkRulesRight(ast, function(node, item, list) {
+        if (node.type === 'Ruleset') {
+            processRuleset(node, item, list);
+        }
+    });
+};