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-/*******************************************************************************
- * OpenAjax.js
- *
- * Reference implementation of the OpenAjax Hub, as specified by OpenAjax Alliance.
- * Specification is under development at:
- *
- * http://www.openajax.org/member/wiki/OpenAjax_Hub_Specification
- *
- * Copyright 2006-2007 OpenAjax Alliance
- *
- * Licensed under the Apache License, Version 2.0 (the "License"); you may not
- * use this file except in compliance with the License. You may obtain a copy
- * of the License at http://www.apache.org/licenses/LICENSE-2.0 . Unless
- * required by applicable law or agreed to in writing, software distributed
- * under the License is distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR
- * CONDITIONS OF ANY KIND, either express or implied. See the License for the
- * specific language governing permissions and limitations under the License.
- *
- ******************************************************************************/
-
-// prevent re-definition of the OpenAjax object
-if(!window["OpenAjax"]){
- OpenAjax = new function(){
- // summary: the OpenAjax hub
- // description: see http://www.openajax.org/member/wiki/OpenAjax_Hub_Specification
-
- var t = true;
- var f = false;
- var g = window;
- var libs;
- var ooh = "org.openajax.hub.";
-
- var h = {};
- this.hub = h;
- h.implementer = "http://openajax.org";
- h.implVersion = "0.6";
- h.specVersion = "0.6";
- h.implExtraData = {};
- var libs = {};
- h.libraries = libs;
-
- h.registerLibrary = function(prefix, nsURL, version, extra){
- libs[prefix] = {
- prefix: prefix,
- namespaceURI: nsURL,
- version: version,
- extraData: extra
- };
- this.publish(ooh+"registerLibrary", libs[prefix]);
- }
- h.unregisterLibrary = function(prefix){
- this.publish(ooh+"unregisterLibrary", libs[prefix]);
- delete libs[prefix];
- }
-
- h._subscriptions = { c:{}, s:[] };
- h._cleanup = [];
- h._subIndex = 0;
- h._pubDepth = 0;
-
- h.subscribe = function(name, callback, scope, subscriberData, filter){
- if(!scope){
- scope = window;
- }
- var handle = name + "." + this._subIndex;
- var sub = { scope: scope, cb: callback, fcb: filter, data: subscriberData, sid: this._subIndex++, hdl: handle };
- var path = name.split(".");
- this._subscribe(this._subscriptions, path, 0, sub);
- return handle;
- }
-
- h.publish = function(name, message){
- var path = name.split(".");
- this._pubDepth++;
- this._publish(this._subscriptions, path, 0, name, message);
- this._pubDepth--;
- if((this._cleanup.length > 0) && (this._pubDepth == 0)){
- for(var i = 0; i < this._cleanup.length; i++){
- this.unsubscribe(this._cleanup[i].hdl);
- }
- delete(this._cleanup);
- this._cleanup = [];
- }
- }
-
- h.unsubscribe = function(sub){
- var path = sub.split(".");
- var sid = path.pop();
- this._unsubscribe(this._subscriptions, path, 0, sid);
- }
-
- h._subscribe = function(tree, path, index, sub){
- var token = path[index];
- if(index == path.length){
- tree.s.push(sub);
- }else{
- if(typeof tree.c == "undefined"){
- tree.c = {};
- }
- if(typeof tree.c[token] == "undefined"){
- tree.c[token] = { c: {}, s: [] };
- this._subscribe(tree.c[token], path, index + 1, sub);
- }else{
- this._subscribe( tree.c[token], path, index + 1, sub);
- }
- }
- }
-
- h._publish = function(tree, path, index, name, msg){
- if(typeof tree != "undefined"){
- var node;
- if(index == path.length) {
- node = tree;
- }else{
- this._publish(tree.c[path[index]], path, index + 1, name, msg);
- this._publish(tree.c["*"], path, index + 1, name, msg);
- node = tree.c["**"];
- }
- if(typeof node != "undefined"){
- var callbacks = node.s;
- var max = callbacks.length;
- for(var i = 0; i < max; i++){
- if(callbacks[i].cb){
- var sc = callbacks[i].scope;
- var cb = callbacks[i].cb;
- var fcb = callbacks[i].fcb;
- var d = callbacks[i].data;
- if(typeof cb == "string"){
- // get a function object
- cb = sc[cb];
- }
- if(typeof fcb == "string"){
- // get a function object
- fcb = sc[fcb];
- }
- if((!fcb) ||
- (fcb.call(sc, name, msg, d))) {
- cb.call(sc, name, msg, d);
- }
- }
- }
- }
- }
- }
-
- h._unsubscribe = function(tree, path, index, sid) {
- if(typeof tree != "undefined") {
- if(index < path.length) {
- var childNode = tree.c[path[index]];
- this._unsubscribe(childNode, path, index + 1, sid);
- if(childNode.s.length == 0) {
- for(var x in childNode.c)
- return;
- delete tree.c[path[index]];
- }
- return;
- }
- else {
- var callbacks = tree.s;
- var max = callbacks.length;
- for(var i = 0; i < max; i++)
- if(sid == callbacks[i].sid) {
- if(this._pubDepth > 0) {
- callbacks[i].cb = null;
- this._cleanup.push(callbacks[i]);
- }
- else
- callbacks.splice(i, 1);
- return;
- }
- }
- }
- }
- // The following function is provided for automatic testing purposes.
- // It is not expected to be deployed in run-time OpenAjax Hub implementations.
- h.reinit = function()
- {
- for (var lib in OpenAjax.hub.libraries) {
- delete OpenAjax.hub.libraries[lib];
- }
- OpenAjax.hub.registerLibrary("OpenAjax", "http://openajax.org/hub", "0.6", {});
-
- delete OpenAjax._subscriptions;
- OpenAjax._subscriptions = {c:{},s:[]};
- delete OpenAjax._cleanup;
- OpenAjax._cleanup = [];
- OpenAjax._subIndex = 0;
- OpenAjax._pubDepth = 0;
- }
- };
- // Register the OpenAjax Hub itself as a library.
- OpenAjax.hub.registerLibrary("OpenAjax", "http://openajax.org/hub", "0.6", {});
-
-}