| <!DOCTYPE html> |
| <!-- |
| Copyright 2015 The Chromium Authors. All rights reserved. |
| Use of this source code is governed by a BSD-style license that can be |
| found in the LICENSE file. |
| --> |
| |
| <link rel="import" href="/core/scripting_controller.html"> |
| <link rel="import" href="/extras/tquery/filter.html"> |
| |
| <script> |
| 'use strict'; |
| |
| tv.exportTo('tv.e.tquery', function() { |
| function FilterIsTopLevel(opt_subExpression) { |
| this.subExpression = opt_subExpression; |
| } |
| |
| FilterIsTopLevel.prototype = { |
| __proto__: tv.e.tquery.Filter.prototype, |
| |
| set subExpression(expr) { |
| this.subExpression_ = tv.e.tquery.Filter.normalizeFilterExpression(expr); |
| }, |
| |
| get subExpression() { |
| return this.subExpression_; |
| }, |
| |
| evaluate: function(context) { |
| if (context.ancestors.length > 0) |
| return false; |
| if (!this.subExpression) |
| return true; |
| return this.subExpression.evaluate(context); |
| } |
| }; |
| tv.c.ScriptingObjectRegistry.register( |
| function(subExpression) { |
| return new FilterIsTopLevel(subExpression); |
| }, |
| { |
| name: 'isTopLevel' |
| } |
| ); |
| return { |
| FilterIsTopLevel: FilterIsTopLevel |
| }; |
| }); |
| </script> |