54 lines
1.8 KiB
JavaScript
54 lines
1.8 KiB
JavaScript
/**
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* Contains factory for visibility object factory
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*
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* Copyright (C) 2011, 2013, 2014 Free Software Foundation, Inc.
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*
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* This file is part of GNU ease.js.
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*
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* ease.js is free software: you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation, either version 3 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program. If not, see <http://www.gnu.org/licenses/>.
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*
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* XXX: Figure out how to resolve Closure Compiler's warning about shared
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* type information
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*/
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// XXX: Tightly coupled
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var util = require( './util' ),
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VisibilityObjectFactory = require( './VisibilityObjectFactory' ),
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FallbackVisibilityObjectFactory =
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require( './FallbackVisibilityObjectFactory' )
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;
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/**
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* Responsible for instantiating the VisibilityObjectFactory appropriate for the
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* runtime environment
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*
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* This prototype determines what class should be instantiated. If we are within
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* an ECMAScript 5 environment, we can take full advantage of the standard
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* visibility object implementation. Otherwise, we are unable to emulate proxies
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* and must fall back on a less sophisticated implementation that sacrifices
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* visibility support.
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*/
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exports.fromEnvironment = function()
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{
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// if falling back, return fallback, otherwise standard
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return ( util.definePropertyFallback() )
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? FallbackVisibilityObjectFactory()
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: VisibilityObjectFactory()
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;
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};
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