first commit

build/node_modules/css-tree/lib/syntax/node/MediaFeature.js

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+var TYPE = require('../../tokenizer').TYPE;
+
+var IDENTIFIER = TYPE.Identifier;
+var NUMBER = TYPE.Number;
+var LEFTPARENTHESIS = TYPE.LeftParenthesis;
+var RIGHTPARENTHESIS = TYPE.RightParenthesis;
+var COLON = TYPE.Colon;
+var SOLIDUS = TYPE.Solidus;
+
+module.exports = {
+    name: 'MediaFeature',
+    structure: {
+        name: String,
+        value: ['Identifier', 'Number', 'Dimension', 'Ratio', null]
+    },
+    parse: function() {
+        var start = this.scanner.tokenStart;
+        var name;
+        var value = null;
+
+        this.scanner.eat(LEFTPARENTHESIS);
+        this.scanner.skipSC();
+
+        name = this.scanner.consume(IDENTIFIER);
+        this.scanner.skipSC();
+
+        if (this.scanner.tokenType !== RIGHTPARENTHESIS) {
+            this.scanner.eat(COLON);
+            this.scanner.skipSC();
+
+            switch (this.scanner.tokenType) {
+                case NUMBER:
+                    if (this.scanner.lookupType(1) === IDENTIFIER) {
+                        value = this.Dimension();
+                    } else if (this.scanner.lookupNonWSType(1) === SOLIDUS) {
+                        value = this.Ratio();
+                    } else {
+                        value = this.Number();
+                    }
+
+                    break;
+
+                case IDENTIFIER:
+                    value = this.Identifier();
+
+                    break;
+
+                default:
+                    this.scanner.error('Number, dimension, ratio or identifier is expected');
+            }
+
+            this.scanner.skipSC();
+        }
+
+        this.scanner.eat(RIGHTPARENTHESIS);
+
+        return {
+            type: 'MediaFeature',
+            loc: this.getLocation(start, this.scanner.tokenStart),
+            name: name,
+            value: value
+        };
+    },
+    generate: function(processChunk, node) {
+        processChunk('(');
+        processChunk(node.name);
+        if (node.value !== null) {
+            processChunk(':');
+            this.generate(processChunk, node.value);
+        }
+        processChunk(')');
+    }
+};