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