ART Mode Switching Issues.js

ART; // inherits ART.SVG
ART.Shape; // inherits ART.SVG.Shape

var surface = new ART(100, 100); // inherits ART.SVG
new ART.Shape().inject(surface); // inherits ART.SVG.Shape

var CustomClass = new Class({

   Extends: ART.Shape

}); // inherits ART.SVG.Shape

ART.switch(ART.Canvas);

ART; // inherits ART.Canvas
ART.Shape; // inherits ART.Canvas.Shape

var surface = new ART(100, 100); // inherits ART.Canvas
new ART.Shape().inject(surface); // inherits ART.Canvas.Shape
new CustomClass().inject(surface); // Error! inherits ART.SVG.Shape

// Problem occurs even if only one mode is permitted per context,
// since ART.Canvas mode is not guaranteed to be defined while
// CustomClass is loading.

// The problem is not specific to on-the-fly context switching but
// extension modes as well.

ART Mode Switching Solutions.js

ART.Class = function(name, obj){
   var parent = obj.Extends;
   for (var mode in ART.modes){
      obj.Extends = ART[mode][parent];
      ART[mode][name] = new Class(obj);
   }
   ART[name] = ART[ART.currentMode][name];
};

ART.Class('CustomClass', {

   Extends: 'Shape'

});

ART.Canvas.CustomClass; // inherits ART.Canvas.Shape

// ...OR...

ART.Shape = new Class({

   initialize: function(){
       this.realObj = new ART.Mode.Shape();
   },

   method: function(){
      return this.realObj.method.apply(this.realObj, arguments);
   }

   // Doesn't create proxy methods for unknown extensions on custom modes
   // Slow indirection
   // Ugly

});

// ...OR...

// ECMAScript Harmony style dynamic module loaders with IoC support
// The global ART is set for this module load context

loadModule('CustomClass', { ART: ART.Canvas }, function(CustomClass){
   CustomClass; // inherits ART.Canvas
   // do stuff
});

// General question... What does CustomClass require in a packager?
// Just ART. It have to assume a mode exists during initialization time.
// The module loader is always required to set the global ART mode.
// Not just for edge cases where on-the-fly context switching is required.