1 files changed, 100 insertions, 0 deletions

diff --git a/node_modules/montage/core/selector/abstract-semantics.js b/node_modules/montage/core/selector/abstract-semantics.js
new file mode 100644
index 00000000..9a55ecca
--- /dev/null
+++ b/node_modules/montage/core/selector/abstract-semantics.js
@@ -0,0 +1,100 @@
+/* <copyright>
+ This file contains proprietary software owned by Motorola Mobility, Inc.<br/>
+ No rights, expressed or implied, whatsoever to this software are provided by Motorola Mobility, Inc. hereunder.<br/>
+ (c) Copyright 2011 Motorola Mobility, Inc.  All Rights Reserved.
+ </copyright> */
+
+var Montage = require("montage").Montage;
+
+var AbstractSemantics = exports.AbstractSemantics = Montage.create(Montage, {
+
+    create: {
+        value: function (prototype, descriptor) {
+            var self = Montage.create(prototype, descriptor);
+
+            var operators = self.operators;
+            self.evaluatorArgumentLengths = {};
+
+            // convert the declared operators into evaluators
+            Object.keys(operators).forEach(function (name) {
+                var operate = operators[name];
+                self.evaluators[name] = function () { // ...args
+                    var args = Array.prototype.slice.call(
+                        arguments,
+                        0,
+                        operate.length
+                    );
+                    return function (value, parameters, visitor) {
+                        return operate.apply(
+                            operators,
+                            args.map(function (argument) {
+                                return argument(value, parameters, visitor);
+                            })
+                        );
+                    };
+                };
+                self.evaluatorArgumentLengths[name] = operate.length;
+            });
+
+            return self;
+        }
+    },
+
+    evaluatorArgumentLengths: {
+        value: null
+    },
+
+    compile: {
+        value: function (syntax, parents) {
+            var self = this;
+            parents = {
+                syntax: syntax,
+                parents: parents
+            };
+            if (syntax.type === 'value') {
+                return function (value) {
+                    return value;
+                };
+            } else if (syntax.type === 'parameters') {
+                return function (value, parameters) {
+                    return parameters;
+                };
+            } else if (syntax.type === 'literal') {
+                return function () {
+                    return syntax.value;
+                };
+            } else if (self.evaluators[syntax.type]) {
+                var evaluator = self.evaluators[syntax.type];
+                var length =
+                    self.evaluatorArgumentLengths[syntax.type] ||
+                        evaluator.length;
+                var args = syntax.args.map(function (child) {
+                    return self.compile(child, parents);
+                });
+                if (syntax.insensitive) {
+                    args = args.map(function (evaluate) {
+                        return function (value, parameters, visitor) {
+                            return evaluate.call(
+                                self,
+                                value,
+                                parameters,
+                                visitor
+                            ).toLowerCase();
+                        };
+                    })
+                }
+                return evaluator.apply(self, args.concat([parents]));
+            } else {
+                throw new Error("Unknown evaluator " + syntax.type);
+            }
+        }
+    },
+
+    evaluate: {
+        value: function (syntax, value, parameters, visitor) {
+            return this.compile(syntax)(value, parameters, visitor);
+        }
+    }
+
+});
+