Added: incubator/shindig/trunk/features/src/main/javascript/features/rpc/wpm.transport.js URL: http://svn.apache.org/viewvc/incubator/shindig/trunk/features/src/main/javascript/features/rpc/wpm.transport.js?rev=777683&view=auto ============================================================================== --- incubator/shindig/trunk/features/src/main/javascript/features/rpc/wpm.transport.js (added) +++ incubator/shindig/trunk/features/src/main/javascript/features/rpc/wpm.transport.js Fri May 22 19:55:02 2009 @@ -0,0 +1,84 @@ +/* + * Licensed to the Apache Software Foundation (ASF) under one + * or more contributor license agreements. See the NOTICE file + * distributed with this work for additional information + * regarding copyright ownership. The ASF licenses this file + * to you under the Apache License, Version 2.0 (the + * "License"); you may not use this file except in compliance + * with the License. You may obtain a copy of the License at + * + * http://www.apache.org/licenses/LICENSE-2.0 + * + * Unless required by applicable law or agreed to in writing, + * software distributed under the License is distributed on an + * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY + * KIND, either express or implied. See the License for the + * specific language governing permissions and limitations under the License. + */ + +var gadgets = gadgets || {}; +gadgets.rpctx = gadgets.rpctx || {}; + +/** + * Transport for browsers that support native messaging (various implementations + * of the HTML5 postMessage method). Officially defined at + * http://www.whatwg.org/specs/web-apps/current-work/multipage/comms.html. + * + * postMessage is a native implementation of XDC. A page registers that + * it would like to receive messages by listening the the "message" event + * on the window (document in DPM) object. In turn, another page can + * raise that event by calling window.postMessage (document.postMessage + * in DPM) with a string representing the message and a string + * indicating on which domain the receiving page must be to receive + * the message. The target page will then have its "message" event raised + * if the domain matches and can, in turn, check the origin of the message + * and process the data contained within. + * + * wpm: postMessage on the window object. + * - Internet Explorer 8+ + * - Safari (latest nightlies as of 26/6/2008) + * - Firefox 3+ + * - Opera 9+ + */ +gadgets.rpctx.Wpm = function() { + var ready; + + return { + getCode: function() { + return 'wpm'; + }, + + isParentVerifiable: function() { + return true; + }, + + init: function(processFn, readyFn) { + ready = readyFn; + // Set up native postMessage handler. + window.addEventListener('message', function(packet) { + // TODO validate packet.domain for security reasons + processFn(gadgets.json.parse(packet.data)); + }, false); + ready('..', true); // Immediately ready to send to parent. + return true; + }, + + setup: function(receiverId, token) { + // If we're a gadget, send an ACK message to indicate to container + // that we're ready to receive messages. + if (receiverId === '..') { + gadgets.rpc.call(receiverId, gadgets.rpc.ACK); + } + return true; + }, + + call: function(targetId, from, rpc) { + var targetWin = targetId === '..' ? parent : frames[targetId]; + var relay = gadgets.rpc.getRelayUrl(targetId); + if (relay) { + targetWin.postMessage(gadgets.json.stringify(rpc), relay); + } + return true; + } + }; +}();
