592 lines
17 KiB
JavaScript
592 lines
17 KiB
JavaScript
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/*
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/*
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Copyright 2006 Adobe Systems Incorporated
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Permission is hereby granted, free of charge, to any person obtaining a copy of this software and associated documentation files (the "Software"),
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to deal in the Software without restriction, including without limitation the rights to use, copy, modify, merge, publish, distribute, sublicense,
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and/or sell copies of the Software, and to permit persons to whom the Software is furnished to do so, subject to the following conditions:
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The above copyright notice and this permission notice shall be included in all copies or substantial portions of the Software.
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THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE
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OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
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*/
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/*
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* The Bridge class, responsible for navigating AS instances
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*/
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function FABridge(target,bridgeName)
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{
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this.target = target;
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this.remoteTypeCache = {};
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this.remoteInstanceCache = {};
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this.remoteFunctionCache = {};
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this.localFunctionCache = {};
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this.bridgeID = FABridge.nextBridgeID++;
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this.name = bridgeName;
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this.nextLocalFuncID = 0;
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FABridge.instances[this.name] = this;
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FABridge.idMap[this.bridgeID] = this;
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return this;
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}
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// type codes for packed values
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FABridge.TYPE_ASINSTANCE = 1;
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FABridge.TYPE_ASFUNCTION = 2;
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FABridge.TYPE_JSFUNCTION = 3;
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FABridge.TYPE_ANONYMOUS = 4;
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FABridge.initCallbacks = {}
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FABridge.argsToArray = function(args)
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{
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var result = [];
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for (var i = 0; i < args.length; i++)
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{
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result[i] = args[i];
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}
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return result;
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}
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function instanceFactory(objID)
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{
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this.fb_instance_id = objID;
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return this;
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}
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function FABridge__invokeJSFunction(args)
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{
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var funcID = args[0];
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var throughArgs = args.concat();//FABridge.argsToArray(arguments);
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throughArgs.shift();
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var bridge = FABridge.extractBridgeFromID(funcID);
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return bridge.invokeLocalFunction(funcID, throughArgs);
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}
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FABridge.addInitializationCallback = function(bridgeName, callback)
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{
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var inst = FABridge.instances[bridgeName];
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if (inst != undefined)
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{
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callback.call(inst);
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return;
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}
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var callbackList = FABridge.initCallbacks[bridgeName];
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if(callbackList == null)
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{
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FABridge.initCallbacks[bridgeName] = callbackList = [];
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}
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callbackList.push(callback);
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}
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function FABridge__bridgeInitialized(bridgeName) {
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var objects = document.getElementsByTagName("object");
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var ol = objects.length;
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var activeObjects = [];
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if (ol > 0) {
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for (var i = 0; i < ol; i++) {
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if (typeof objects[i].SetVariable != "undefined") {
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activeObjects[activeObjects.length] = objects[i];
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}
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}
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}
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var embeds = document.getElementsByTagName("embed");
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var el = embeds.length;
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var activeEmbeds = [];
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if (el > 0) {
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for (var j = 0; j < el; j++) {
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if (typeof embeds[j].SetVariable != "undefined") {
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activeEmbeds[activeEmbeds.length] = embeds[j];
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}
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}
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}
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var aol = activeObjects.length;
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var ael = activeEmbeds.length;
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var searchStr = "bridgeName="+ bridgeName;
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if ((aol == 1 && !ael) || (aol == 1 && ael == 1)) {
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FABridge.attachBridge(activeObjects[0], bridgeName);
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}
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else if (ael == 1 && !aol) {
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FABridge.attachBridge(activeEmbeds[0], bridgeName);
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}
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else {
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var flash_found = false;
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if (aol > 1) {
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for (var k = 0; k < aol; k++) {
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var params = activeObjects[k].childNodes;
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for (var l = 0; l < params.length; l++) {
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var param = params[l];
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if (param.nodeType == 1 && param.tagName.toLowerCase() == "param" && param["name"].toLowerCase() == "flashvars" && param["value"].indexOf(searchStr) >= 0) {
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FABridge.attachBridge(activeObjects[k], bridgeName);
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flash_found = true;
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break;
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}
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}
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if (flash_found) {
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break;
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}
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}
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}
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if (!flash_found && ael > 1) {
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for (var m = 0; m < ael; m++) {
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var flashVars = activeEmbeds[m].attributes.getNamedItem("flashVars").nodeValue;
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if (flashVars.indexOf(searchStr) >= 0) {
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FABridge.attachBridge(activeEmbeds[m], bridgeName);
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break;
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}
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}
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}
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}
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return true;
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}
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// used to track multiple bridge instances, since callbacks from AS are global across the page.
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FABridge.nextBridgeID = 0;
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FABridge.instances = {};
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FABridge.idMap = {};
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FABridge.refCount = 0;
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FABridge.extractBridgeFromID = function(id)
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{
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var bridgeID = (id >> 16);
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return FABridge.idMap[bridgeID];
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}
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FABridge.attachBridge = function(instance, bridgeName)
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{
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var newBridgeInstance = new FABridge(instance, bridgeName);
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FABridge[bridgeName] = newBridgeInstance;
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/* FABridge[bridgeName] = function() {
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return newBridgeInstance.root();
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}
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*/
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var callbacks = FABridge.initCallbacks[bridgeName];
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if (callbacks == null)
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{
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return;
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}
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for (var i = 0; i < callbacks.length; i++)
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{
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callbacks[i].call(newBridgeInstance);
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}
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delete FABridge.initCallbacks[bridgeName]
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}
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// some methods can't be proxied. You can use the explicit get,set, and call methods if necessary.
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FABridge.blockedMethods =
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{
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toString: true,
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get: true,
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set: true,
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call: true
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};
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FABridge.prototype =
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{
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// bootstrapping
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root: function()
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{
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return this.deserialize(this.target.getRoot());
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},
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//clears all of the AS objects in the cache maps
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releaseASObjects: function()
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{
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return this.target.releaseASObjects();
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},
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//clears a specific object in AS from the type maps
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releaseNamedASObject: function(value)
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{
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if(typeof(value) != "object")
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{
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return false;
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}
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else
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{
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var ret = this.target.releaseNamedASObject(value.fb_instance_id);
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return ret;
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}
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},
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//create a new AS Object
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create: function(className)
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{
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return this.deserialize(this.target.create(className));
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},
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// utilities
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makeID: function(token)
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{
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return (this.bridgeID << 16) + token;
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},
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// low level access to the flash object
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//get a named property from an AS object
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getPropertyFromAS: function(objRef, propName)
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{
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if (FABridge.refCount > 0)
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{
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throw new Error("You are trying to call recursively into the Flash Player which is not allowed. In most cases the JavaScript setTimeout function, can be used as a workaround.");
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}
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else
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{
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FABridge.refCount++;
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retVal = this.target.getPropFromAS(objRef, propName);
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retVal = this.handleError(retVal);
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FABridge.refCount--;
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return retVal;
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}
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},
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//set a named property on an AS object
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setPropertyInAS: function(objRef,propName, value)
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{
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if (FABridge.refCount > 0)
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{
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throw new Error("You are trying to call recursively into the Flash Player which is not allowed. In most cases the JavaScript setTimeout function, can be used as a workaround.");
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}
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else
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{
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FABridge.refCount++;
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retVal = this.target.setPropInAS(objRef,propName, this.serialize(value));
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retVal = this.handleError(retVal);
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FABridge.refCount--;
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return retVal;
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}
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},
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//call an AS function
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callASFunction: function(funcID, args)
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{
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if (FABridge.refCount > 0)
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{
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throw new Error("You are trying to call recursively into the Flash Player which is not allowed. In most cases the JavaScript setTimeout function, can be used as a workaround.");
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}
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else
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{
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FABridge.refCount++;
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retVal = this.target.invokeASFunction(funcID, this.serialize(args));
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retVal = this.handleError(retVal);
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FABridge.refCount--;
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return retVal;
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}
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},
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//call a method on an AS object
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callASMethod: function(objID, funcName, args)
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{
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if (FABridge.refCount > 0)
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{
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throw new Error("You are trying to call recursively into the Flash Player which is not allowed. In most cases the JavaScript setTimeout function, can be used as a workaround.");
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}
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else
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{
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FABridge.refCount++;
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args = this.serialize(args);
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retVal = this.target.invokeASMethod(objID, funcName, args);
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retVal = this.handleError(retVal);
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FABridge.refCount--;
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return retVal;
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}
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},
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// responders to remote calls from flash
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//callback from flash that executes a local JS function
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//used mostly when setting js functions as callbacks on events
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invokeLocalFunction: function(funcID, args)
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{
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var result;
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var func = this.localFunctionCache[funcID];
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if(func != undefined)
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{
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result = this.serialize(func.apply(null, this.deserialize(args)));
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}
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return result;
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},
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// Object Types and Proxies
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// accepts an object reference, returns a type object matching the obj reference.
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getTypeFromName: function(objTypeName)
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{
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return this.remoteTypeCache[objTypeName];
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},
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//create an AS proxy for the given object ID and type
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createProxy: function(objID, typeName)
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{
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var objType = this.getTypeFromName(typeName);
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instanceFactory.prototype = objType;
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var instance = new instanceFactory(objID);
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this.remoteInstanceCache[objID] = instance;
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return instance;
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},
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//return the proxy associated with the given object ID
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getProxy: function(objID)
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{
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return this.remoteInstanceCache[objID];
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},
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// accepts a type structure, returns a constructed type
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addTypeDataToCache: function(typeData)
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{
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newType = new ASProxy(this, typeData.name);
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var accessors = typeData.accessors;
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for (var i = 0; i < accessors.length; i++)
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{
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this.addPropertyToType(newType, accessors[i]);
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}
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var methods = typeData.methods;
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for (var i = 0; i < methods.length; i++)
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{
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if (FABridge.blockedMethods[methods[i]] == undefined)
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{
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this.addMethodToType(newType, methods[i]);
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}
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}
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this.remoteTypeCache[newType.typeName] = newType;
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return newType;
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},
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//add a property to a typename; used to define the properties that can be called on an AS proxied object
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addPropertyToType: function(ty, propName)
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{
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var c = propName.charAt(0);
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var setterName;
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var getterName;
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if(c >= "a" && c <= "z")
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{
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getterName = "get" + c.toUpperCase() + propName.substr(1);
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setterName = "set" + c.toUpperCase() + propName.substr(1);
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}
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else
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{
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getterName = "get" + propName;
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setterName = "set" + propName;
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}
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ty[setterName] = function(val)
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{
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this.bridge.setPropertyInAS(this.fb_instance_id, propName, val);
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}
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ty[getterName] = function()
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{
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return this.bridge.deserialize(this.bridge.getPropertyFromAS(this.fb_instance_id, propName));
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}
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|
},
|
||
|
|
|
||
|
|
//add a method to a typename; used to define the methods that can be callefd on an AS proxied object
|
||
|
|
addMethodToType: function(ty, methodName)
|
||
|
|
{
|
||
|
|
ty[methodName] = function()
|
||
|
|
{
|
||
|
|
return this.bridge.deserialize(this.bridge.callASMethod(this.fb_instance_id, methodName, FABridge.argsToArray(arguments)));
|
||
|
|
}
|
||
|
|
},
|
||
|
|
|
||
|
|
// Function Proxies
|
||
|
|
|
||
|
|
//returns the AS proxy for the specified function ID
|
||
|
|
getFunctionProxy: function(funcID)
|
||
|
|
{
|
||
|
|
var bridge = this;
|
||
|
|
if (this.remoteFunctionCache[funcID] == null)
|
||
|
|
{
|
||
|
|
this.remoteFunctionCache[funcID] = function()
|
||
|
|
{
|
||
|
|
bridge.callASFunction(funcID, FABridge.argsToArray(arguments));
|
||
|
|
}
|
||
|
|
}
|
||
|
|
return this.remoteFunctionCache[funcID];
|
||
|
|
},
|
||
|
|
|
||
|
|
//reutrns the ID of the given function; if it doesnt exist it is created and added to the local cache
|
||
|
|
getFunctionID: function(func)
|
||
|
|
{
|
||
|
|
if (func.__bridge_id__ == undefined)
|
||
|
|
{
|
||
|
|
func.__bridge_id__ = this.makeID(this.nextLocalFuncID++);
|
||
|
|
this.localFunctionCache[func.__bridge_id__] = func;
|
||
|
|
}
|
||
|
|
return func.__bridge_id__;
|
||
|
|
},
|
||
|
|
|
||
|
|
// serialization / deserialization
|
||
|
|
|
||
|
|
serialize: function(value)
|
||
|
|
{
|
||
|
|
var result = {};
|
||
|
|
|
||
|
|
var t = typeof(value);
|
||
|
|
//primitives are kept as such
|
||
|
|
if (t == "number" || t == "string" || t == "boolean" || t == null || t == undefined)
|
||
|
|
{
|
||
|
|
result = value;
|
||
|
|
}
|
||
|
|
else if (value instanceof Array)
|
||
|
|
{
|
||
|
|
//arrays are serializesd recursively
|
||
|
|
result = [];
|
||
|
|
for (var i = 0; i < value.length; i++)
|
||
|
|
{
|
||
|
|
result[i] = this.serialize(value[i]);
|
||
|
|
}
|
||
|
|
}
|
||
|
|
else if (t == "function")
|
||
|
|
{
|
||
|
|
//js functions are assigned an ID and stored in the local cache
|
||
|
|
result.type = FABridge.TYPE_JSFUNCTION;
|
||
|
|
result.value = this.getFunctionID(value);
|
||
|
|
}
|
||
|
|
else if (value instanceof ASProxy)
|
||
|
|
{
|
||
|
|
result.type = FABridge.TYPE_ASINSTANCE;
|
||
|
|
result.value = value.fb_instance_id;
|
||
|
|
}
|
||
|
|
else
|
||
|
|
{
|
||
|
|
result.type = FABridge.TYPE_ANONYMOUS;
|
||
|
|
result.value = value;
|
||
|
|
}
|
||
|
|
|
||
|
|
return result;
|
||
|
|
},
|
||
|
|
|
||
|
|
//on deserialization we always check the return for the specific error code that is used to marshall NPE's into JS errors
|
||
|
|
// the unpacking is done by returning the value on each pachet for objects/arrays
|
||
|
|
deserialize: function(packedValue)
|
||
|
|
{
|
||
|
|
|
||
|
|
var result;
|
||
|
|
|
||
|
|
var t = typeof(packedValue);
|
||
|
|
if (t == "number" || t == "string" || t == "boolean" || packedValue == null || packedValue == undefined)
|
||
|
|
{
|
||
|
|
result = this.handleError(packedValue);
|
||
|
|
}
|
||
|
|
else if (packedValue instanceof Array)
|
||
|
|
{
|
||
|
|
result = [];
|
||
|
|
for (var i = 0; i < packedValue.length; i++)
|
||
|
|
{
|
||
|
|
result[i] = this.deserialize(packedValue[i]);
|
||
|
|
}
|
||
|
|
}
|
||
|
|
else if (t == "object")
|
||
|
|
{
|
||
|
|
for(var i = 0; i < packedValue.newTypes.length; i++)
|
||
|
|
{
|
||
|
|
this.addTypeDataToCache(packedValue.newTypes[i]);
|
||
|
|
}
|
||
|
|
for (var aRefID in packedValue.newRefs)
|
||
|
|
{
|
||
|
|
this.createProxy(aRefID, packedValue.newRefs[aRefID]);
|
||
|
|
}
|
||
|
|
if (packedValue.type == FABridge.TYPE_PRIMITIVE)
|
||
|
|
{
|
||
|
|
result = packedValue.value;
|
||
|
|
}
|
||
|
|
else if (packedValue.type == FABridge.TYPE_ASFUNCTION)
|
||
|
|
{
|
||
|
|
result = this.getFunctionProxy(packedValue.value);
|
||
|
|
}
|
||
|
|
else if (packedValue.type == FABridge.TYPE_ASINSTANCE)
|
||
|
|
{
|
||
|
|
result = this.getProxy(packedValue.value);
|
||
|
|
}
|
||
|
|
else if (packedValue.type == FABridge.TYPE_ANONYMOUS)
|
||
|
|
{
|
||
|
|
result = packedValue.value;
|
||
|
|
}
|
||
|
|
}
|
||
|
|
return result;
|
||
|
|
},
|
||
|
|
//increases the reference count for the given object
|
||
|
|
addRef: function(obj)
|
||
|
|
{
|
||
|
|
this.target.incRef(obj.fb_instance_id);
|
||
|
|
},
|
||
|
|
//decrease the reference count for the given object and release it if needed
|
||
|
|
release:function(obj)
|
||
|
|
{
|
||
|
|
this.target.releaseRef(obj.fb_instance_id);
|
||
|
|
},
|
||
|
|
|
||
|
|
// check the given value for the components of the hard-coded error code : __FLASHERROR
|
||
|
|
// used to marshall NPE's into flash
|
||
|
|
|
||
|
|
handleError: function(value)
|
||
|
|
{
|
||
|
|
if (typeof(value)=="string" && value.indexOf("__FLASHERROR")==0)
|
||
|
|
{
|
||
|
|
var myErrorMessage = value.split("||");
|
||
|
|
if(FABridge.refCount > 0 )
|
||
|
|
{
|
||
|
|
FABridge.refCount--;
|
||
|
|
}
|
||
|
|
throw new Error(myErrorMessage[1]);
|
||
|
|
return value;
|
||
|
|
}
|
||
|
|
else
|
||
|
|
{
|
||
|
|
return value;
|
||
|
|
}
|
||
|
|
}
|
||
|
|
};
|
||
|
|
|
||
|
|
// The root ASProxy class that facades a flash object
|
||
|
|
|
||
|
|
ASProxy = function(bridge, typeName)
|
||
|
|
{
|
||
|
|
this.bridge = bridge;
|
||
|
|
this.typeName = typeName;
|
||
|
|
return this;
|
||
|
|
};
|
||
|
|
//methods available on each ASProxy object
|
||
|
|
ASProxy.prototype =
|
||
|
|
{
|
||
|
|
get: function(propName)
|
||
|
|
{
|
||
|
|
return this.bridge.deserialize(this.bridge.getPropertyFromAS(this.fb_instance_id, propName));
|
||
|
|
},
|
||
|
|
|
||
|
|
set: function(propName, value)
|
||
|
|
{
|
||
|
|
this.bridge.setPropertyInAS(this.fb_instance_id, propName, value);
|
||
|
|
},
|
||
|
|
|
||
|
|
call: function(funcName, args)
|
||
|
|
{
|
||
|
|
this.bridge.callASMethod(this.fb_instance_id, funcName, args);
|
||
|
|
},
|
||
|
|
|
||
|
|
addRef: function() {
|
||
|
|
this.bridge.addRef(this);
|
||
|
|
},
|
||
|
|
|
||
|
|
release: function() {
|
||
|
|
this.bridge.release(this);
|
||
|
|
}
|
||
|
|
};
|