(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);