mDispatch = { log: function() { // console.log.apply(console, arguments); }, mode: 'sync', onCalculateEventEnd : null, onCalculateEventBegin : null, asyncCallbacks: {}, asyncCallbackId: 0, numAsyncCalculations:0, handleResponse: function(data) { mDispatch.numAsyncCalculations--; if (window.onCalculateEventEnd) window.onCalculateEventEnd(mDispatch.numAsyncCalculations); var callback = mDispatch.asyncCallbacks[data.callback]; delete mDispatch.asyncCallbacks[data.callback]; mDispatch.log("onmessage ",data.callback,data.original.cmd); if (callback) if (data.exception) callback.invoke(new Error(data.exception)); else callback.invoke(data.result); }, onWorkerResponse: function(message) { var data = message.data; if (data.original.cmd == 'ping') { if (mDispatch.mode != 'native') { mDispatch.log("ping received switching to worker mode"); mDispatch.mode = 'worker'; } } else { mDispatch.handleResponse(data); } }, dispatch: function(cmd, a, force) { mDispatch.numAsyncCalculations++; if (window.onCalculateEventBegin) window.onCalculateEventBegin(mDispatch.numAsyncCalculations); var callback = a[0]; var args = Array.prototype.slice.call(a,1); force = (force == undefined) ? false : force; var mode = mDispatch.mode; if (mode == 'worker' && startsWith(cmd,'srp')) mode = 'async'; if (mode == 'sync') { try { mDispatch.log("sync",cmd); var result = mSupport[cmd].apply(null, args); callback.invoke(result); } catch (exception) { if (cmd != 'ping') if (callback) callback.invoke(exception); } mDispatch.numAsyncCalculations--; if (window.onCalculateEventEnd) window.onCalculateEventEnd(mDispatch.numAsyncCalculations); } else if (mode == 'async') { var callbackId = mDispatch.asyncCallbackId++; mDispatch.asyncCallbacks[callbackId] = callback; setTimeout( function(){ var request = {cmd:cmd, args:args, callback:callbackId}; var response = {original:request, callback:callbackId}; try { response.result = mSupport[cmd].apply(null,args); } catch (exception) { response.exception = exception; } mDispatch.handleResponse(response); }, 0 ); } else if (mode == 'worker') { var callbackId = mDispatch.asyncCallbackId++; mDispatch.asyncCallbacks[callbackId] = callback; mDispatch.log("worker ",callbackId, cmd); mDispatch.worker.postMessage({cmd:cmd, args:args, callback:callbackId}); } else if (mode == 'native') { var callbackId = mDispatch.asyncCallbackId++; mDispatch.asyncCallbacks[callbackId] = callback; mDispatch.log("native",callbackId, cmd); mNative.sendRequest({cmd:cmd, args:args, callback:callbackId}) } }, startWorker: function() { if (mDispatch.mode != 'native') { mDispatch.log("starting worker"); mDispatch.mode = 'worker'; mDispatch.worker = new Worker('js/mWorker.js'); mDispatch.worker.onmessage = mDispatch.onWorkerResponse; mDispatch.worker.postMessage({cmd:'ping', args:[], callback:-1}); } }, startNative: function() { if (mDispatch.mode == 'worker') { mDispatch.worker.postMessage({cmd:'shutdown'}); } mDispatch.mode = 'native'; mNative.onResponse = mDispatch.handleResponse; mNative.sendRequest({cmd:'cout',args:["starting native"], callback:-1}); }, }; $(document).ready(setTimeout(function() { mDispatch.startWorker(); }, 250));