krafthaus/bauhaus

define(function() {

function addGetHookIf( conditionFn, hookFn ) {
    // Define the hook, we'll check on the first run if it's really needed.
    return {
        get: function() {
            var condition = conditionFn();

            if ( condition == null ) {
                // The test was not ready at this point; screw the hook this time
                // but check again when needed next time.
                return;
            }

            if ( condition ) {
                // Hook not needed (or it's not possible to use it due to missing dependency),
                // remove it.
                // Since there are no other hooks for marginRight, remove the whole object.
                delete this.get;
                return;
            }

            // Hook needed; redefine it so that the support test is not executed again.

            return (this.get = hookFn).apply( this, arguments );
        }
    };
}

return addGetHookIf;

});