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/*
        Copyright (c) 2004-2006, The Dojo Foundation
        All Rights Reserved.

        Licensed under the Academic Free License version 2.1 or above OR the
        modified BSD license. For more information on Dojo licensing, see:

                http://dojotoolkit.org/community/licensing.shtml
*/

dojo.provide("dojo.ns");
dojo.ns = {namespaces:{}, failed:{}, loading:{}, loaded:{}, register:function (name, module, resolver, noOverride) {
        if (!noOverride || !this.namespaces[name]) {
                this.namespaces[name] = new dojo.ns.Ns(name, module, resolver);
        }
}, allow:function (name) {
        if (this.failed[name]) {
                return false;
        }
        if ((djConfig.excludeNamespace) && (dojo.lang.inArray(djConfig.excludeNamespace, name))) {
                return false;
        }
        return ((name == this.dojo) || (!djConfig.includeNamespace) || (dojo.lang.inArray(djConfig.includeNamespace, name)));
}, get:function (name) {
        return this.namespaces[name];
}, require:function (name) {
        var ns = this.namespaces[name];
        if ((ns) && (this.loaded[name])) {
                return ns;
        }
        if (!this.allow(name)) {
                return false;
        }
        if (this.loading[name]) {
                dojo.debug("dojo.namespace.require: re-entrant request to load namespace \"" + name + "\" must fail.");
                return false;
        }
        var req = dojo.require;
        this.loading[name] = true;
        try {
                if (name == "dojo") {
                        req("dojo.namespaces.dojo");
                } else {
                        if (!dojo.hostenv.moduleHasPrefix(name)) {
                                dojo.registerModulePath(name, "../" + name);
                        }
                        req([name, "manifest"].join("."), false, true);
                }
                if (!this.namespaces[name]) {
                        this.failed[name] = true;
                }
        }
        finally {
                this.loading[name] = false;
        }
        return this.namespaces[name];
}};
dojo.ns.Ns = function (name, module, resolver) {
        this.name = name;
        this.module = module;
        this.resolver = resolver;
        this._loaded = [];
        this._failed = [];
};
dojo.ns.Ns.prototype.resolve = function (name, domain, omitModuleCheck) {
        if (!this.resolver || djConfig["skipAutoRequire"]) {
                return false;
        }
        var fullName = this.resolver(name, domain);
        if ((fullName) && (!this._loaded[fullName]) && (!this._failed[fullName])) {
                var req = dojo.require;
                req(fullName, false, true);
                if (dojo.hostenv.findModule(fullName, false)) {
                        this._loaded[fullName] = true;
                } else {
                        if (!omitModuleCheck) {
                                dojo.raise("dojo.ns.Ns.resolve: module '" + fullName + "' not found after loading via namespace '" + this.name + "'");
                        }
                        this._failed[fullName] = true;
                }
        }
        return Boolean(this._loaded[fullName]);
};
dojo.registerNamespace = function (name, module, resolver) {
        dojo.ns.register.apply(dojo.ns, arguments);
};
dojo.registerNamespaceResolver = function (name, resolver) {
        var n = dojo.ns.namespaces[name];
        if (n) {
                n.resolver = resolver;
        }
};
dojo.registerNamespaceManifest = function (module, path, name, widgetModule, resolver) {
        dojo.registerModulePath(name, path);
        dojo.registerNamespace(name, widgetModule, resolver);
};
dojo.registerNamespace("dojo", "dojo.widget");