135 lines
4.5 KiB
JavaScript
135 lines
4.5 KiB
JavaScript
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(function ($, undef) {
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var global = this;
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// Namespace.
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global.FS = global.FS || {};
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global.FS.PostMessage = function ()
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{
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var
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_is_child = false,
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_postman = new NoJQueryPostMessageMixin('postMessage', 'receiveMessage'),
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_callbacks = {},
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_base_url,
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_parent_url = decodeURIComponent(document.location.hash.replace(/^#/, '')),
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_parent_subdomain = _parent_url.substring(0, _parent_url.indexOf('/', ('https://' === _parent_url.substring(0, ('https://').length)) ? 8 : 7)),
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_init = function () {
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_postman.receiveMessage(function (e) {
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var data = JSON.parse(e.data);
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if (_callbacks[data.type]) {
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for (var i = 0; i < _callbacks[data.type].length; i++) {
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// Execute type callbacks.
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_callbacks[data.type][i](data.data);
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}
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}
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}, _base_url);
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},
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_hasParent = ('' !== _parent_url),
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$window = $(window),
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$html = $('html');
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return {
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init : function (url, iframes)
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{
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_base_url = url;
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_init();
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// Automatically receive forward messages.
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FS.PostMessage.receiveOnce('forward', function (data){
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window.location = data.url;
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});
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iframes = iframes || [];
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if (iframes.length > 0) {
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$window.on('scroll', function () {
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for (var i = 0; i < iframes.length; i++) {
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FS.PostMessage.postScroll(iframes[i]);
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}
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});
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}
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},
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init_child : function ()
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{
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this.init(_parent_subdomain);
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_is_child = true;
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// Post height of a child right after window is loaded.
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$(window).bind('load', function () {
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FS.PostMessage.postHeight();
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// Post message that window was loaded.
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FS.PostMessage.post('loaded');
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});
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},
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hasParent : function ()
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{
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return _hasParent;
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},
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postHeight : function (diff, wrapper) {
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diff = diff || 0;
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wrapper = wrapper || '#wrap_section';
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this.post('height', {
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height: diff + $(wrapper).outerHeight(true)
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});
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},
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postScroll : function (iframe) {
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this.post('scroll', {
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top: $window.scrollTop(),
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height: ($window.height() - parseFloat($html.css('paddingTop')) - parseFloat($html.css('marginTop')))
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}, iframe);
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},
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post : function (type, data, iframe)
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{
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console.debug('PostMessage.post', type);
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if (iframe)
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{
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// Post to iframe.
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_postman.postMessage(JSON.stringify({
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type: type,
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data: data
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}), iframe.src, iframe.contentWindow);
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}
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else {
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// Post to parent.
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_postman.postMessage(JSON.stringify({
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type: type,
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data: data
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}), _parent_url, window.parent);
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}
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},
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receive: function (type, callback)
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{
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console.debug('PostMessage.receive', type);
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if (undef === _callbacks[type])
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_callbacks[type] = [];
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_callbacks[type].push(callback);
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},
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receiveOnce: function (type, callback)
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{
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if (this.is_set(type))
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return;
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this.receive(type, callback);
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},
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// Check if any callbacks assigned to a specified message type.
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is_set: function (type)
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{
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return (undef != _callbacks[type]);
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},
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parent_url: function ()
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{
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return _parent_url;
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},
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parent_subdomain: function ()
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{
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return _parent_subdomain;
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}
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};
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}();
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})(jQuery);
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