Added color-shorthand option

.csscomb.json

@@ -5,6 +5,7 @@
     ],
     "colon-space": true,
     "color-case": "lower",
+    "color-shorthand": true,
     "leading-zero": false,
     "rule-indent": true,
     "block-indent": true,

README.md

@@ -36,6 +36,7 @@ Example configuration:
     "exclude": ["node_modules/**"],
     "colon-space": true,
     "color-case": "lower",
+    "color-shorthand": true,
     "leading-zero": false,
     "rule-indent": true,
     "block-indent": true,

lib/csscomb.js

@@ -13,6 +13,7 @@ var Comb = function() {
     this._options = [
         'always-semicolon',
         'color-case',
+        'color-shorthand',
         'leading-zero',
         'strip-spaces',
         'stick-brace',

lib/options/color-shorthand.js

@@ -0,0 +1,31 @@
+module.exports = {
+
+    /**
+     * Sets handler value.
+     *
+     * @param {Boolean} value Option value
+     * @returns {Object}
+     */
+    setValue: function(value) {
+        if (value === true || value === false) {
+            this._value = value;
+            return this;
+        }
+    },
+
+    /**
+     * Processes tree node.
+     * @param {String} nodeType
+     * @param {node} node
+     */
+    process: function(nodeType, node) {
+        if (nodeType === 'vhash') {
+            if (this._value) {
+                node[0] = node[0].replace(/(\w)\1(\w)\2(\w)\3/i, '$1$2$3');
+            } else {
+                node[0] = node[0].replace(/^(\w)(\w)(\w)$/, '$1$1$2$2$3$3');
+            }
+        }
+    }
+
+};

test/color-shorthand.js

@@ -0,0 +1,41 @@
+var Comb = require('../lib/csscomb');
+var assert = require('assert');
+
+describe('options/color-shorthand', function() {
+    var comb;
+
+    beforeEach(function() {
+        comb = new Comb();
+    });
+
+    it('Should shrink hexadecimal colors to 3 symbols', function() {
+        comb.configure({ 'color-shorthand': true });
+        assert.equal(
+            comb.processString(
+                'div { color: #aabbcc }'
+            ),
+            'div { color: #abc }'
+        );
+    });
+
+    it('Should expand hexadecimal colors to 6 symbols', function() {
+        comb.configure({ 'color-shorthand': false });
+        assert.equal(
+            comb.processString(
+                'div { color: #7ad }'
+            ),
+            'div { color: #77aadd }'
+        );
+    });
+
+    it('Should save case while processing', function() {
+        comb.configure({ 'color-shorthand': true });
+        assert.equal(
+            comb.processString(
+                'div { color: #fFAafF }'
+            ),
+            'div { color: #fAf }'
+        );
+    });
+
+});

test/integral.origin.css

@@ -17,10 +17,10 @@
     .radio-button_theme_normal .radio-button__radio:after
     {
         background: #fFf;
-        background: -webkit-linear-gradient(top, #Fff 0,#eeE 100%);
+        background: -webkit-linear-gradient(top, #FffFff 0,#eeeeEe 100%);
         background: -moz-linear-gradient(top, #fff 0, #eEe 100%);
         background: -o-linear-gradient(top, #fff 0,#eee 100%);
-        background: linear-gradient(to bottom, #fff 0,#eEe 100%);
+        background: linear-gradient(to bottom, #ffffff 0,#eeEeee 100%);
     }
 
     /* _focused_yes */