86 lines
2.6 KiB
JavaScript
86 lines
2.6 KiB
JavaScript
/**
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* Default method wrapper functions
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*
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* Copyright (C) 2010 Mike Gerwitz
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*
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* This file is part of ease.js.
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*
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* ease.js is free software: you can redistribute it and/or modify it under the
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* terms of the GNU Lesser General Public License as published by the Free
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* Software Foundation, either version 3 of the License, or (at your option)
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* any later version.
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*
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* This program is distributed in the hope that it will be useful, but WITHOUT
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* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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* FITNESS FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public License
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* for more details.
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*
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* You should have received a copy of the GNU Lesser 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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* @author Mike Gerwitz
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*/
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/**
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* Method wrappers for standard (non-fallback)
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* @type {Object}
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*/
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exports.standard = {
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wrapOverride: function( method, super_method, cid, getInst )
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{
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return function()
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{
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var context = getInst( this, cid ) || this,
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retval = undefined
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;
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// the _super property will contain the parent method (we don't
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// store the previous value for performance reasons and because,
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// during conventional use, it's completely unnecessary)
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context.__super = super_method;
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retval = method.apply( context, arguments );
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// prevent sneaky bastards from breaking encapsulation by stealing
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// method references (we set to undefined rather than deleting it
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// because deletion causes performance degradation within V8)
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context.__super = undefined;
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// if the value returned from the method was the context that we
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// passed in, return the actual instance (to ensure we do not break
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// encapsulation)
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if ( retval === context )
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{
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return this;
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}
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return retval;
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};
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},
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wrapNew: function( method, super_method, cid, getInst )
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{
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return function()
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{
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var context = getInst( this, cid ) || this,
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retval = undefined
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;
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// invoke the method
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retval = method.apply( context, arguments );
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// if the value returned from the method was the context that we
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// passed in, return the actual instance (to ensure we do not break
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// encapsulation)
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if ( retval === context )
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{
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return this;
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}
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return retval;
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};
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},
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};
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