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