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//>>built
// wrapped by build app
define("dojox/lang/oo/mixin", ["dijit","dojo","dojox","dojo/require!dojox/lang/oo/Filter,dojox/lang/oo/Decorator"], function(dijit,dojo,dojox){
dojo.provide("dojox.lang.oo.mixin");
dojo.experimental("dojox.lang.oo.mixin");
dojo.require("dojox.lang.oo.Filter");
dojo.require("dojox.lang.oo.Decorator");
(function(){
var oo = dojox.lang.oo, Filter = oo.Filter, Decorator = oo.Decorator, empty = {},
defaultFilter = function(name){ return name; },
defaultDecorator = function(name, newValue, oldValue){ return newValue; },
defaultMixer = function(target, name, newValue, oldValue){ target[name] = newValue; },
defaults = {}, // for the internal use in the mixin()
extraNames = dojo._extraNames, extraLen = extraNames.length,
applyDecorator = oo.applyDecorator = function(decorator, name, newValue, oldValue){
// summary:
// applies a decorator unraveling all embedded decorators
// decorator: Function:
// top-level decorator to apply
// name: String:
// name of the property
// newValue: Object:
// new value of the property
// oldValue: Object:
// old value of the property
// returns: Object:
// returns the final value of the property
if(newValue instanceof Decorator){
var d = newValue.decorator;
newValue = applyDecorator(decorator, name, newValue.value, oldValue);
return d(name, newValue, oldValue);
}
return decorator(name, newValue, oldValue);
};
/*=====
dojox.lang.oo.__MixinDefaults = function(){
// summary:
// a dict of default parameters for dojox.lang.oo._mixin
// decorator: Function:
// a decorator function to be used in absence of other decorators
// filter: Function:
// a filter function to be used in absence of other filters
// mixer: Function:
// a mixer function to be used to mix in new properties
this.decorator = decorator;
this.filter = filter;
this.mixer = mixer;
};
=====*/
oo.__mixin = function(target, source, decorator, filter, mixer){
// summary:
// mixes in two objects processing decorators and filters
// target: Object:
// target to receive new/updated properties
// source: Object:
// source of properties
// defaults: dojox.lang.oo.__MixinDefaults?:
// default functions for various aspects of mixing
// returns: Object:
// target
var name, targetName, prop, newValue, oldValue, i;
// start mixing in properties
for(name in source){
prop = source[name];
if(!(name in empty) || empty[name] !== prop){
targetName = filter(name, target, source, prop);
if(targetName && (!(targetName in target) || !(targetName in empty) || empty[targetName] !== prop)){
// name is accepted
oldValue = target[targetName];
newValue = applyDecorator(decorator, targetName, prop, oldValue);
if(oldValue !== newValue){
mixer(target, targetName, newValue, oldValue);
}
}
}
}
if(extraLen){
for(i = 0; i < extraLen; ++i){
name = extraNames[i];
// repeating the body above
prop = source[name];
if(!(name in empty) || empty[name] !== prop){
targetName = filter(name, target, source, prop);
if(targetName && (!(targetName in target) || !(targetName in empty) || empty[targetName] !== prop)){
// name is accepted
oldValue = target[targetName];
newValue = applyDecorator(decorator, targetName, prop, oldValue);
if(oldValue !== newValue){
mixer(target, targetName, newValue, oldValue);
}
}
}
}
}
return target; // Object
};
oo.mixin = function(target, source){
// summary:
// mixes in two or more objects processing decorators and filters
// using defaults as a fallback
// target: Object:
// target to receive new/updated properties
// source: Object...:
// source of properties, more than one source is allowed
// returns: Object:
// target
var decorator, filter, i = 1, l = arguments.length;
for(; i < l; ++i){
source = arguments[i];
if(source instanceof Filter){
filter = source.filter;
source = source.bag;
}else{
filter = defaultFilter;
}
if(source instanceof Decorator){
decorator = source.decorator;
source = source.value;
}else{
decorator = defaultDecorator;
}
oo.__mixin(target, source, decorator, filter, defaultMixer);
}
return target; // Object
};
})();
});
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