Alexandre poirot

/* ***** BEGIN LICENSE BLOCK *****

# Copyright 2010 Alexandre Poirot

#

# Contributor(s):

# Alexandre poirot <poirot.alex@gmail.com>

#

#

# This library is free software; you can redistribute it and/or

# modify it under the terms of the GNU Lesser General Public

# License as published by the Free Software Foundation; either

# version 2.1 of the License, or (at your option) any later version.

#

# This library is distributed in the hope that it will be useful,

# but WITHOUT ANY WARRANTY; without even the implied warranty of

# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU

# Lesser General Public License for more details.

#

# You should have received a copy of the GNU Lesser General Public

# License along with this library. If not, see <http://www.gnu.org/licenses/>.

#

# ***** END LICENSE BLOCK *****/

var NativeBridge = {

callbacksCount : 1,

callbacks : {},

// Automatically called by native layer when a result is available

resultForCallback : function resultForCallback(callbackId, resultArray) {

try {

var callback = NativeBridge.callbacks[callbackId];

if (!callback) return;

callback.apply(null,resultArray);

} catch(e) {alert(e)}

},

// Use this in javascript to request native objective-c code

// functionName : string (I think the name is explicit :p)

// args : array of arguments

// callback : function with n-arguments that is going to be called when the native code returned

call : function call(functionName, args, callback) {

var hasCallback = callback && typeof callback == "function";

var callbackId = hasCallback ? NativeBridge.callbacksCount++ : 0;

if (hasCallback)

NativeBridge.callbacks[callbackId] = callback;

var iframe = document.createElement("IFRAME");

iframe.setAttribute("src", "js-frame:" + functionName + ":" + callbackId+ ":" + encodeURIComponent(JSON.stringify(args)));

// For some reason we need to set a non-empty size for the iOS6 simulator...

iframe.setAttribute("height", "1px");

iframe.setAttribute("width", "1px");

document.documentElement.appendChild(iframe);

iframe.parentNode.removeChild(iframe);

iframe = null;

}

};

//. run ...
//var testCallback = function testCallback(result) { };
//NativeBridge.call('flagTag', ["s","1"], testCallback);