diff options
Diffstat (limited to 'includes/js/dojox/flash/DojoExternalInterface.as')
| -rw-r--r-- | includes/js/dojox/flash/DojoExternalInterface.as | 168 |
1 files changed, 168 insertions, 0 deletions
diff --git a/includes/js/dojox/flash/DojoExternalInterface.as b/includes/js/dojox/flash/DojoExternalInterface.as new file mode 100644 index 0000000..d857968 --- /dev/null +++ b/includes/js/dojox/flash/DojoExternalInterface.as @@ -0,0 +1,168 @@ +/**
+ A wrapper around Flash 8's ExternalInterface; this is needed
+ because ExternalInterface has a number of serialization bugs that we
+ need to correct for.
+
+ @author Brad Neuberg
+*/
+
+import flash.external.ExternalInterface;
+
+class DojoExternalInterface{
+ public static var available:Boolean;
+ public static var dojoPath = "";
+
+ public static function initialize(){
+ //trace("DojoExternalInterface.initialize");
+
+ // extract the dojo base path
+ DojoExternalInterface.dojoPath = DojoExternalInterface.getDojoPath();
+
+ // see if we need to do an express install
+ var install:ExpressInstall = new ExpressInstall();
+ if(install.needsUpdate){
+ install.init();
+ }
+
+ // set whether communication is available
+ DojoExternalInterface.available = ExternalInterface.available;
+ }
+
+ /** Called when we are finished adding methods through addCallback. */
+ public static function done(){
+ //trace("done");
+ DojoExternalInterface.call("dojox.flash.loaded");
+ }
+
+ public static function addCallback(methodName:String, instance:Object,
+ method:Function):Boolean{
+ //trace("addCallback");
+ ExternalInterface.addCallback(methodName, instance, function(){
+ instance = (instance) ? instance : null;
+ var params = [];
+ if(arguments && arguments.length){
+ for(var i = 0; i < arguments.length; i++){
+ params[i] = DojoExternalInterface.decodeData(arguments[i]);
+ }
+ }
+
+ var results = method.apply(instance, params);
+ results = DojoExternalInterface.encodeData(results);
+
+ return results;
+ });
+
+ // tell JavaScript about DojoExternalInterface new method so we can create a proxy
+ ExternalInterface.call("dojox.flash.comm._addExternalInterfaceCallback",
+ methodName);
+
+ return true;
+ }
+
+ public static function call(methodName:String):Void{
+ // we might have any number of optional arguments, so we have to
+ // pass them in dynamically; strip out the results callback
+ var parameters = new Array();
+ for(var i = 0; i < arguments.length; i++){
+ parameters.push(arguments[i]);
+ }
+
+ // FIXME: Should we be encoding or decoding the data to get
+ // around Flash's serialization bugs?
+
+ var results = ExternalInterface.call.apply(ExternalInterface, parameters);
+
+ return results;
+ }
+
+ /**
+ Called by Flash to indicate to JavaScript that we are ready to have
+ our Flash functions called. Calling loaded()
+ will fire the dojox.flash.loaded() event, so that JavaScript can know that
+ Flash has finished loading and adding its callbacks, and can begin to
+ interact with the Flash file.
+ */
+ public static function loaded(){
+ DojoExternalInterface.call("dojox.flash.loaded");
+ }
+
+ /**
+ Utility trace implementation that prints out to console.debug.
+ */
+ public static function trace(msg){
+ DojoExternalInterface.call("console.debug", "FLASH: " + msg);
+ }
+
+ private static function decodeData(data):String{
+ if(!data || typeof data != "string"){
+ return data;
+ }
+
+ // we have to use custom encodings for certain characters when passing
+ // them over; for example, passing a backslash over as //// from JavaScript
+ // to Flash doesn't work
+ data = replaceStr(data, "&custom_backslash;", "\\");
+
+ data = replaceStr(data, "\\\'", "\'");
+ data = replaceStr(data, "\\\"", "\"");
+
+ return data;
+ }
+
+ private static function encodeData(data):String{
+ if(!data || typeof data != "string"){
+ return data;
+ }
+
+ // certain XMLish characters break Flash's wire serialization for
+ // ExternalInterface; encode these into a custom encoding, rather than
+ // the standard entity encoding, because otherwise we won't be able to
+ // differentiate between our own encoding and any entity characters
+ // that are being used in the string itself
+ data = replaceStr(data, '<', '&custom_lt;');
+ data = replaceStr(data, '>', '&custom_gt;');
+
+ // needed for IE
+ data = replaceStr(data, '\\', '&custom_backslash;');
+
+ // encode control characters and JavaScript delimiters
+ data = replaceStr(data, "\n", "\\n");
+ data = replaceStr(data, "\r", "\\r");
+ data = replaceStr(data, "\f", "\\f");
+ data = replaceStr(data, "'", "\\'");
+ data = replaceStr(data, '"', '\"');
+
+ return data;
+ }
+
+ /**
+ Flash ActionScript has no String.replace method or support for
+ Regular Expressions! We roll our own very simple one.
+ */
+ public static function replaceStr(inputStr:String, replaceThis:String,
+ withThis:String):String{
+ var splitStr = inputStr.split(replaceThis);
+ if(!splitStr){
+ return inputStr;
+ }
+
+ inputStr = splitStr.join(withThis);
+ return inputStr;
+ }
+
+ private static function getDojoPath(){
+ var url = _root._url;
+ var start = url.indexOf("baseUrl=") + "baseUrl=".length;
+ var path = url.substring(start);
+ var end = path.indexOf("&");
+ if(end != -1){
+ path = path.substring(0, end);
+ }
+
+ // some browsers append a junk string at the end: '%20'%20quality=
+ if(path.indexOf("'%20'%20quality=") != -1){
+ path = path.substring(0, path.indexOf("'%20'%20quality="));
+ }
+ return path;
+ }
+}
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