// ===========================================================================
// Copyright 2018 Autodesk, Inc. All rights reserved.
//
// Use of this software is subject to the terms of the Autodesk license
// agreement provided at the time of installation or download, or which
// otherwise accompanies this software in either electronic or hard copy form.
// ===========================================================================
//
// Description: This procedure will return true if the specified render
//              layer is connected to the render layer manager. This
//              will be used as a filter script in the render globals
//              editor.
//
global proc int layerOnRenderManager(string $findRenderLayer)
{
    int $isFound = false;
    string $managerLayers[] = `listConnections renderLayerManager.renderLayerId`;
    for ($layer in $managerLayers) {
        if ($layer == $findRenderLayer && `nodeType $layer` == "renderLayer" ) {
            $isFound = true;
            break;
        }
    }
    return $isFound;
}

// Description: This procedure is used to update the controls in
//      frame Render Layer/Pass.
//
global proc createRenderLayerFilters()
{
    //  Create render layers filters if they have not been created already.
	//	Item filters are no longer deleted on file new/open, so they only
	// 	need to be created once per session of Maya.
    if( !`itemFilter -exists defaultRenderLayerFilter` ) 
    {
        itemFilter -bn defaultRenderLayer -classification "builtIn" defaultRenderLayerFilter;
    }

    if( !`itemFilter -exists renderLayerFilter` ) 
    {
        itemFilter -byScript layerOnRenderManager -classification "builtIn" renderLayerFilter;
    }
}