f3561df1d8
git-svn-id: http://www.cozmixng.org/repos/piro/treestyletab/trunk@7103 599a83e7-65a4-db11-8015-0010dcdd6dc2
71 lines
1.8 KiB
JavaScript
71 lines
1.8 KiB
JavaScript
/*
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Shared Namespace Library for JavaScript Code Modules
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Usage:
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Components.utils.import('resource://my-modules/namespace.jsm');
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var namespace = getNamespaceFor('mylibrary');
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if (!namespace.func1) {
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namespace.func1 = function() { ... };
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namespace.func2 = function() { ... };
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}
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var EXPORTED_SYMBOLS = ['func1', 'func2'];
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var func1 = namespace.func1;
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var func2 = namespace.func2;
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license: The MIT License, Copyright (c) 2010 SHIMODA "Piro" Hiroshi
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http://www.cozmixng.org/repos/piro/fx3-compatibility-lib/trunk/license.txt
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original:
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http://www.cozmixng.org/repos/piro/fx3-compatibility-lib/trunk/namespace.js
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*/
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var EXPORTED_SYMBOLS = ['getNamespaceFor'];
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const Cc = Components.classes;
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const Ci = Components.interfaces;
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const currentRevision = 2;
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const QUERY = 'namespace.jsm[piro.sakura.ne.jp]:GetExistingNamespace';
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const STORAGE_PROP = 'namespaces-storage';
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const ObserverService = Cc['@mozilla.org/observer-service;1']
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.getService(Ci.nsIObserverService);
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var bag = Cc['@mozilla.org/hash-property-bag;1']
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.createInstance(Ci.nsIPropertyBag);
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ObserverService.notifyObservers(bag, QUERY, null);
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var storage;
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try {
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storage = bag.getProperty(STORAGE_PROP);
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}
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catch(e) {
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// This is the first provider of namespaces, so I create a new storage.
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storage = {};
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}
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// Export the storage to other instances when they are loaded.
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ObserverService.addObserver(
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{
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observe : function(aSubject, aTopic, aData)
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{
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if (aTopic != QUERY) return;
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aSubject.QueryInterface(Ci.nsIWritablePropertyBag)
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.setProperty(STORAGE_PROP, storage);
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}
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},
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QUERY,
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false
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);
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function getNamespaceFor(aName)
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{
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if (!aName)
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throw new Error('you must specify the name of the namespace!');
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if (!(aName in storage))
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storage[aName] = {};
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return storage[aName];
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}
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