+++ /dev/null
-/**\r
- A wrapper around Flash 8's ExternalInterface; this is needed\r
- because ExternalInterface has a number of serialization bugs that we \r
- need to correct for.\r
- \r
- @author Brad Neuberg\r
-*/\r
-\r
-import flash.external.ExternalInterface;\r
-\r
-class DojoExternalInterface{\r
- public static var available:Boolean;\r
- public static var dojoPath = "";\r
- \r
- public static function initialize(){\r
- //trace("DojoExternalInterface.initialize");\r
- \r
- // extract the dojo base path\r
- DojoExternalInterface.dojoPath = DojoExternalInterface.getDojoPath();\r
- \r
- // see if we need to do an express install\r
- var install:ExpressInstall = new ExpressInstall();\r
- if(install.needsUpdate){\r
- install.init();\r
- }\r
- \r
- // set whether communication is available\r
- DojoExternalInterface.available = ExternalInterface.available;\r
- }\r
- \r
- /** Called when we are finished adding methods through addCallback. */\r
- public static function done(){\r
- //trace("done");\r
- DojoExternalInterface.call("dojox.flash.loaded");\r
- }\r
- \r
- public static function addCallback(methodName:String, instance:Object, \r
- method:Function):Boolean{\r
- //trace("addCallback");\r
- ExternalInterface.addCallback(methodName, instance, function(){\r
- instance = (instance) ? instance : null;\r
- var params = [];\r
- if(arguments && arguments.length){\r
- for(var i = 0; i < arguments.length; i++){\r
- params[i] = DojoExternalInterface.decodeData(arguments[i]);\r
- }\r
- }\r
- \r
- var results = method.apply(instance, params);\r
- results = DojoExternalInterface.encodeData(results);\r
- \r
- return results;\r
- });\r
- \r
- // tell JavaScript about DojoExternalInterface new method so we can create a proxy\r
- ExternalInterface.call("dojox.flash.comm._addExternalInterfaceCallback", \r
- methodName);\r
- \r
- return true;\r
- }\r
- \r
- public static function call(methodName:String):Void{\r
- // we might have any number of optional arguments, so we have to \r
- // pass them in dynamically; strip out the results callback\r
- var parameters = new Array();\r
- for(var i = 0; i < arguments.length; i++){\r
- parameters.push(arguments[i]);\r
- }\r
- \r
- // FIXME: Should we be encoding or decoding the data to get\r
- // around Flash's serialization bugs?\r
- \r
- var results = ExternalInterface.call.apply(ExternalInterface, parameters);\r
- \r
- return results;\r
- }\r
- \r
- /** \r
- Called by Flash to indicate to JavaScript that we are ready to have\r
- our Flash functions called. Calling loaded()\r
- will fire the dojox.flash.loaded() event, so that JavaScript can know that\r
- Flash has finished loading and adding its callbacks, and can begin to\r
- interact with the Flash file.\r
- */\r
- public static function loaded(){\r
- DojoExternalInterface.call("dojox.flash.loaded");\r
- }\r
- \r
- /**\r
- Utility trace implementation that prints out to console.debug.\r
- */\r
- public static function trace(msg){\r
- DojoExternalInterface.call("console.debug", "FLASH: " + msg);\r
- }\r
- \r
- private static function decodeData(data):String{\r
- if(!data || typeof data != "string"){\r
- return data;\r
- }\r
- \r
- // we have to use custom encodings for certain characters when passing\r
- // them over; for example, passing a backslash over as //// from JavaScript\r
- // to Flash doesn't work\r
- data = replaceStr(data, "&custom_backslash;", "\\");\r
- \r
- data = replaceStr(data, "\\\'", "\'");\r
- data = replaceStr(data, "\\\"", "\"");\r
- \r
- return data;\r
- }\r
- \r
- private static function encodeData(data):String{ \r
- if(!data || typeof data != "string"){\r
- return data;\r
- }\r
- \r
- // certain XMLish characters break Flash's wire serialization for\r
- // ExternalInterface; encode these into a custom encoding, rather than\r
- // the standard entity encoding, because otherwise we won't be able to\r
- // differentiate between our own encoding and any entity characters\r
- // that are being used in the string itself\r
- data = replaceStr(data, '<', '&custom_lt;');\r
- data = replaceStr(data, '>', '&custom_gt;');\r
- \r
- // needed for IE\r
- data = replaceStr(data, '\\', '&custom_backslash;');\r
- \r
- // encode control characters and JavaScript delimiters\r
- data = replaceStr(data, "\n", "\\n");\r
- data = replaceStr(data, "\r", "\\r");\r
- data = replaceStr(data, "\f", "\\f");\r
- data = replaceStr(data, "'", "\\'");\r
- data = replaceStr(data, '"', '\"');\r
- \r
- return data;\r
- }\r
- \r
- /** \r
- Flash ActionScript has no String.replace method or support for\r
- Regular Expressions! We roll our own very simple one.\r
- */\r
- public static function replaceStr(inputStr:String, replaceThis:String, \r
- withThis:String):String{\r
- var splitStr = inputStr.split(replaceThis);\r
- if(!splitStr){\r
- return inputStr;\r
- }\r
- \r
- inputStr = splitStr.join(withThis);\r
- return inputStr;\r
- }\r
- \r
- private static function getDojoPath(){\r
- var url = _root._url;\r
- var start = url.indexOf("baseUrl=") + "baseUrl=".length;\r
- var path = url.substring(start);\r
- var end = path.indexOf("&");\r
- if(end != -1){\r
- path = path.substring(0, end);\r
- }\r
- \r
- // some browsers append a junk string at the end: '%20'%20quality=\r
- if(path.indexOf("'%20'%20quality=") != -1){\r
- path = path.substring(0, path.indexOf("'%20'%20quality="));\r
- }\r
- return path;\r
- }\r
-}\r
projects / eow / blobdiff