Merge branch 'master' of https://github.com/danvk/dygraphs
[dygraphs.git] / auto_tests / tests / Proxy.js
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718ad8e2 1// Copyright (c) 2011 Google, Inc.
644eff8b
RK
2//
3// Permission is hereby granted, free of charge, to any person obtaining a copy
4// of this software and associated documentation files (the "Software"), to deal
5// in the Software without restriction, including without limitation the rights
6// to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
7// copies of the Software, and to permit persons to whom the Software is
8// furnished to do so, subject to the following conditions:
9//
10// The above copyright notice and this permission notice shall be included in
11// all copies or substantial portions of the Software.
12//
13// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
14// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
15// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
16// AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
17// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
18// OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
19// THE SOFTWARE.
20
21/**
22 * @fileoverview A general purpose object proxy that logs all method calls.
23 *
24 * @author konigsberg@google.com (Robert Konigsberg)
25 */
26
27var Proxy = function(delegate) {
28 this.delegate__ = delegate;
29 this.calls__ = [];
30 this.propertiesToTrack__ = [];
31
32 for (var propname in delegate) {
33 var type = typeof(delegate[propname]);
34
35 // Functions are passed through to the delegate, and are logged
36 // prior to the call.
37 if (type == "function") {
38 function makeFunc(name) {
39 return function() {
40 this.log__(name, arguments);
41 this.delegate__[name].apply(this.delegate__, arguments);
42 }
43 };
44 this[propname] = makeFunc(propname);
45 } else if (type == "string" || type == "number") {
46 // String and number properties are just passed through to the delegate.
47 this.propertiesToTrack__.push(propname);
48 function makeSetter(name) {
49 return function(x) {
50 this.delegate__[name] = x;
51 }
52 };
53 this.__defineSetter__(propname, makeSetter(propname));
54
55 function makeGetter(name) {
56 return function() {
57 return this.delegate__[name];
58 }
59 };
60 this.__defineGetter__(propname, makeGetter(propname));
61 }
62 }
63};
64
65Proxy.prototype.log__ = function(name, args) {
66 var properties = {};
67 for (var propIdx in this.propertiesToTrack__) {
68 var prop = this.propertiesToTrack__[propIdx];
69 properties[prop] = this.delegate__[prop];
70 }
71 var call = { name : name, args : args, properties: properties };
72 this.calls__.push(call);
73};
74