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Diffstat (limited to 'plugins/jetpack/_inc/postmessage.js')
| -rw-r--r-- | plugins/jetpack/_inc/postmessage.js | 438 |
1 files changed, 438 insertions, 0 deletions
diff --git a/plugins/jetpack/_inc/postmessage.js b/plugins/jetpack/_inc/postmessage.js new file mode 100644 index 00000000..51f8567b --- /dev/null +++ b/plugins/jetpack/_inc/postmessage.js @@ -0,0 +1,438 @@ +/** + The MIT License + + Copyright (c) 2010 Daniel Park (http://metaweb.com, http://postmessage.freebaseapps.com) + + Permission is hereby granted, free of charge, to any person obtaining a copy + of this software and associated documentation files (the "Software"), to deal + in the Software without restriction, including without limitation the rights + to use, copy, modify, merge, publish, distribute, sublicense, and/or sell + copies of the Software, and to permit persons to whom the Software is + furnished to do so, subject to the following conditions: + + The above copyright notice and this permission notice shall be included in + all copies or substantial portions of the Software. + + THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR + IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, + FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE + AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER + LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, + OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN + THE SOFTWARE. + **/ +var NO_JQUERY = {}; +(function(window, $, undefined) { + + if (!("console" in window)) { + var c = window.console = {}; + c.log = c.warn = c.error = c.debug = function(){}; + } + + if ($ === NO_JQUERY) { + // jQuery is optional + $ = { + fn: {}, + extend: function() { + var a = arguments[0]; + for (var i=1,len=arguments.length; i<len; i++) { + var b = arguments[i]; + for (var prop in b) { + a[prop] = b[prop]; + } + } + return a; + } + }; + } + + $.fn.pm = function() { + console.log("usage: \nto send: $.pm(options)\nto receive: $.pm.bind(type, fn, [origin])"); + return this; + }; + + // send postmessage + $.pm = window.pm = function(options) { + pm.send(options); + }; + + // bind postmessage handler + $.pm.bind = window.pm.bind = function(type, fn, origin, hash, async_reply) { + pm.bind(type, fn, origin, hash, async_reply === true); + }; + + // unbind postmessage handler + $.pm.unbind = window.pm.unbind = function(type, fn) { + pm.unbind(type, fn); + }; + + // default postmessage origin on bind + $.pm.origin = window.pm.origin = null; + + // default postmessage polling if using location hash to pass postmessages + $.pm.poll = window.pm.poll = 200; + + var pm = { + + send: function(options) { + var o = $.extend({}, pm.defaults, options), + target = o.target; + if (!o.target) { + console.warn("postmessage target window required"); + return; + } + if (!o.type) { + console.warn("postmessage type required"); + return; + } + var msg = {data:o.data, type:o.type}; + if (o.success) { + msg.callback = pm._callback(o.success); + } + if (o.error) { + msg.errback = pm._callback(o.error); + } + if (("postMessage" in target) && !o.hash) { + pm._bind(); + target.postMessage(JSON.stringify(msg), o.origin || '*'); + } + else { + pm.hash._bind(); + pm.hash.send(o, msg); + } + }, + + bind: function(type, fn, origin, hash, async_reply) { + pm._replyBind ( type, fn, origin, hash, async_reply ); + }, + + _replyBind: function(type, fn, origin, hash, isCallback) { + if (("postMessage" in window) && !hash) { + pm._bind(); + } + else { + pm.hash._bind(); + } + var l = pm.data("listeners.postmessage"); + if (!l) { + l = {}; + pm.data("listeners.postmessage", l); + } + var fns = l[type]; + if (!fns) { + fns = []; + l[type] = fns; + } + fns.push({fn:fn, callback: isCallback, origin:origin || $.pm.origin}); + }, + + unbind: function(type, fn) { + var l = pm.data("listeners.postmessage"); + if (l) { + if (type) { + if (fn) { + // remove specific listener + var fns = l[type]; + if (fns) { + var m = []; + for (var i=0,len=fns.length; i<len; i++) { + var o = fns[i]; + if (o.fn !== fn) { + m.push(o); + } + } + l[type] = m; + } + } + else { + // remove all listeners by type + delete l[type]; + } + } + else { + // unbind all listeners of all type + for (var i in l) { + delete l[i]; + } + } + } + }, + + data: function(k, v) { + if (v === undefined) { + return pm._data[k]; + } + pm._data[k] = v; + return v; + }, + + _data: {}, + + _CHARS: '0123456789ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz'.split(''), + + _random: function() { + var r = []; + for (var i=0; i<32; i++) { + r[i] = pm._CHARS[0 | Math.random() * 32]; + }; + return r.join(""); + }, + + _callback: function(fn) { + var cbs = pm.data("callbacks.postmessage"); + if (!cbs) { + cbs = {}; + pm.data("callbacks.postmessage", cbs); + } + var r = pm._random(); + cbs[r] = fn; + return r; + }, + + _bind: function() { + // are we already listening to message events on this w? + if (!pm.data("listening.postmessage")) { + if (window.addEventListener) { + window.addEventListener("message", pm._dispatch, false); + } + else if (window.attachEvent) { + window.attachEvent("onmessage", pm._dispatch); + } + pm.data("listening.postmessage", 1); + } + }, + + _dispatch: function(e) { + //console.log("$.pm.dispatch", e, this); + try { + var msg = JSON.parse(e.data); + } + catch (ex) { + //console.warn("postmessage data invalid json: ", ex); //message wasn't meant for pm + return; + } + if (!msg.type) { + //console.warn("postmessage message type required"); //message wasn't meant for pm + return; + } + var cbs = pm.data("callbacks.postmessage") || {}, + cb = cbs[msg.type]; + if (cb) { + cb(msg.data); + } + else { + var l = pm.data("listeners.postmessage") || {}; + var fns = l[msg.type] || []; + for (var i=0,len=fns.length; i<len; i++) { + var o = fns[i]; + if (o.origin && o.origin !== '*' && e.origin !== o.origin) { + console.warn("postmessage message origin mismatch", e.origin, o.origin); + if (msg.errback) { + // notify post message errback + var error = { + message: "postmessage origin mismatch", + origin: [e.origin, o.origin] + }; + pm.send({target:e.source, data:error, type:msg.errback}); + } + continue; + } + + function sendReply ( data ) { + if (msg.callback) { + pm.send({target:e.source, data:data, type:msg.callback}); + } + } + + try { + if ( o.callback ) { + o.fn(msg.data, sendReply, e); + } else { + sendReply ( o.fn(msg.data, e) ); + } + } + catch (ex) { + if (msg.errback) { + // notify post message errback + pm.send({target:e.source, data:ex, type:msg.errback}); + } else { + throw ex; + } + } + }; + } + } + }; + + // location hash polling + pm.hash = { + + send: function(options, msg) { + //console.log("hash.send", target_window, options, msg); + var target_window = options.target, + target_url = options.url; + if (!target_url) { + console.warn("postmessage target window url is required"); + return; + } + target_url = pm.hash._url(target_url); + var source_window, + source_url = pm.hash._url(window.location.href); + if (window == target_window.parent) { + source_window = "parent"; + } + else { + try { + for (var i=0,len=parent.frames.length; i<len; i++) { + var f = parent.frames[i]; + if (f == window) { + source_window = i; + break; + } + }; + } + catch(ex) { + // Opera: security error trying to access parent.frames x-origin + // juse use window.name + source_window = window.name; + } + } + if (source_window == null) { + console.warn("postmessage windows must be direct parent/child windows and the child must be available through the parent window.frames list"); + return; + } + var hashmessage = { + "x-requested-with": "postmessage", + source: { + name: source_window, + url: source_url + }, + postmessage: msg + }; + var hash_id = "#x-postmessage-id=" + pm._random(); + target_window.location = target_url + hash_id + encodeURIComponent(JSON.stringify(hashmessage)); + }, + + _regex: /^\#x\-postmessage\-id\=(\w{32})/, + + _regex_len: "#x-postmessage-id=".length + 32, + + _bind: function() { + // are we already listening to message events on this w? + if (!pm.data("polling.postmessage")) { + setInterval(function() { + var hash = "" + window.location.hash, + m = pm.hash._regex.exec(hash); + if (m) { + var id = m[1]; + if (pm.hash._last !== id) { + pm.hash._last = id; + pm.hash._dispatch(hash.substring(pm.hash._regex_len)); + } + } + }, $.pm.poll || 200); + pm.data("polling.postmessage", 1); + } + }, + + _dispatch: function(hash) { + if (!hash) { + return; + } + try { + hash = JSON.parse(decodeURIComponent(hash)); + if (!(hash['x-requested-with'] === 'postmessage' && + hash.source && hash.source.name != null && hash.source.url && hash.postmessage)) { + // ignore since hash could've come from somewhere else + return; + } + } + catch (ex) { + // ignore since hash could've come from somewhere else + return; + } + var msg = hash.postmessage, + cbs = pm.data("callbacks.postmessage") || {}, + cb = cbs[msg.type]; + if (cb) { + cb(msg.data); + } + else { + var source_window; + if (hash.source.name === "parent") { + source_window = window.parent; + } + else { + source_window = window.frames[hash.source.name]; + } + var l = pm.data("listeners.postmessage") || {}; + var fns = l[msg.type] || []; + for (var i=0,len=fns.length; i<len; i++) { + var o = fns[i]; + if (o.origin) { + var origin = /https?\:\/\/[^\/]*/.exec(hash.source.url)[0]; + if (o.origin !== '*' && origin !== o.origin) { + console.warn("postmessage message origin mismatch", origin, o.origin); + if (msg.errback) { + // notify post message errback + var error = { + message: "postmessage origin mismatch", + origin: [origin, o.origin] + }; + pm.send({target:source_window, data:error, type:msg.errback, hash:true, url:hash.source.url}); + } + continue; + } + } + + function sendReply ( data ) { + if (msg.callback) { + pm.send({target:source_window, data:data, type:msg.callback, hash:true, url:hash.source.url}); + } + } + + try { + if ( o.callback ) { + o.fn(msg.data, sendReply); + } else { + sendReply ( o.fn(msg.data) ); + } + } + catch (ex) { + if (msg.errback) { + // notify post message errback + pm.send({target:source_window, data:ex, type:msg.errback, hash:true, url:hash.source.url}); + } else { + throw ex; + } + } + }; + } + }, + + _url: function(url) { + // url minus hash part + return (""+url).replace(/#.*$/, ""); + } + + }; + + $.extend(pm, { + defaults: { + target: null, /* target window (required) */ + url: null, /* target window url (required if no window.postMessage or hash == true) */ + type: null, /* message type (required) */ + data: null, /* message data (required) */ + success: null, /* success callback (optional) */ + error: null, /* error callback (optional) */ + origin: "*", /* postmessage origin (optional) */ + hash: false /* use location hash for message passing (optional) */ + } + }); + + })(this, typeof jQuery === "undefined" ? 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