postmessage.js
4.47 KB
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
(function ($, undef) {
var global = this;
// Namespace.
global.FS = global.FS || {};
global.FS.PostMessage = function ()
{
var
_is_child = false,
_postman = new NoJQueryPostMessageMixin('postMessage', 'receiveMessage'),
_callbacks = {},
_base_url,
_parent_url = decodeURIComponent(document.location.hash.replace(/^#/, '')),
_parent_subdomain = _parent_url.substring(0, _parent_url.indexOf('/', ('https://' === _parent_url.substring(0, ('https://').length)) ? 8 : 7)),
_init = function () {
_postman.receiveMessage(function (e) {
var data = JSON.parse(e.data);
if (_callbacks[data.type]) {
for (var i = 0; i < _callbacks[data.type].length; i++) {
// Execute type callbacks.
_callbacks[data.type][i](data.data);
}
}
}, _base_url);
},
_hasParent = ('' !== _parent_url),
$window = $(window),
$html = $('html');
return {
init : function (url, iframes)
{
_base_url = url;
_init();
// Automatically receive forward messages.
FS.PostMessage.receiveOnce('forward', function (data){
window.location = data.url;
});
iframes = iframes || [];
if (iframes.length > 0) {
$window.on('scroll', function () {
for (var i = 0; i < iframes.length; i++) {
FS.PostMessage.postScroll(iframes[i]);
}
});
}
},
init_child : function ()
{
this.init(_parent_subdomain);
_is_child = true;
// Post height of a child right after window is loaded.
$(window).bind('load', function () {
FS.PostMessage.postHeight();
// Post message that window was loaded.
FS.PostMessage.post('loaded');
});
},
hasParent : function ()
{
return _hasParent;
},
postHeight : function (diff, wrapper) {
diff = diff || 0;
wrapper = wrapper || '#wrap_section';
this.post('height', {
height: diff + $(wrapper).outerHeight(true)
});
},
postScroll : function (iframe) {
this.post('scroll', {
top: $window.scrollTop(),
height: ($window.height() - parseFloat($html.css('paddingTop')) - parseFloat($html.css('marginTop')))
}, iframe);
},
post : function (type, data, iframe)
{
console.debug('PostMessage.post', type);
if (iframe)
{
// Post to iframe.
_postman.postMessage(JSON.stringify({
type: type,
data: data
}), iframe.src, iframe.contentWindow);
}
else {
// Post to parent.
_postman.postMessage(JSON.stringify({
type: type,
data: data
}), _parent_url, window.parent);
}
},
receive: function (type, callback)
{
console.debug('PostMessage.receive', type);
if (undef === _callbacks[type])
_callbacks[type] = [];
_callbacks[type].push(callback);
},
receiveOnce: function (type, callback)
{
if (this.is_set(type))
return;
this.receive(type, callback);
},
// Check if any callbacks assigned to a specified message type.
is_set: function (type)
{
return (undef != _callbacks[type]);
},
parent_url: function ()
{
return _parent_url;
},
parent_subdomain: function ()
{
return _parent_subdomain;
}
};
}();
})(jQuery);