// ===========================================================================
// 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.
// ===========================================================================
// ===========================================================================
//
//  Creation Date: October 9, 2016
//
//  Procedure Name:
//      texCheckSelection
//
//  Description:
//      UV workflow function used for checking for valid selections.
//
//  Input Arguments
//      selectionType        - String - What selection type to validate.
//
//  Return Value:
//      None - The procedure errorCode is called for managing error messages.
//
//  Notes:
//  This script is part of the implementation of Nightshade UV Editor into
//  Autodesk Maya. This script is sourced by other scripts. Do not run it 
//  directly.
//
// ===========================================================================

global proc texCheckSelection(string $selectionType)
{
    string $selection[];

    switch($selectionType){
    case "any": // Any components
        $selection = `filterExpand -sm 12 -sm 31 -sm 32 -sm 34 -sm 35`;
        if (size($selection) == 0){
            error((uiRes("m_texCheckSelection.kNoSelection")));
        }
        break;

    case "mesh": // Meshes
        $selection = `filterExpand -selectionMask 12`;
        if (size($selection) == 0){
            error((uiRes("m_texCheckSelection.kNoMesh")));
        }
        break;

    case "comps": // Components only
        $selection = `filterExpand -sm 31 -sm 32 -sm 34 -sm 35`;
        if (size($selection) == 0){
            error((uiRes("m_texCheckSelection.kNoComponents")));
        }
        break;

    case "mesh1": // ONE mesh only
        $selection = `filterExpand -selectionMask 12`;
        if (size($selection) != 1){
            error((uiRes("m_texCheckSelection.kNoSingleMesh")));
        }
        break;

    case "face": // Faces
        $selection = `filterExpand -selectionMask 34`;
        if (size($selection) == 0){
            error((uiRes("m_texCheckSelection.kNoFace")));
        }
        break;

    case "face1": // ONE face only - Unused atm
        $selection = `filterExpand -selectionMask 34`;
        if (size($selection) != 1){
            error((uiRes("m_texCheckSelection.kNoSingleFace")));
        }
        break;

    case "faceMesh": // Faces or meshes
        $selection = `filterExpand -sm 12 -sm 34`;
        if (size($selection) == 0){
            error((uiRes("m_texCheckSelection.kNoFaceMesh")));
        }
        break;

    case "faceUV": // Faces or UVs
        $selection = `filterExpand -sm 34 -sm 35`;
        if (size($selection) == 0){
            error((uiRes("m_texCheckSelection.kNoFaceUV")));
        }
        break;

    case "edge": // Edges
        $selection = `filterExpand -selectionMask 32`;
        if (size($selection) == 0){
            error((uiRes("m_texCheckSelection.kNoEdge")));
        }
        break;

    case "edgeUV": // Edges or UVs
        $selection = `filterExpand -sm 32 -sm 35`;
        if (size($selection) == 0){
            error((uiRes("m_texCheckSelection.kNoEdgeUV")));
        }
        break;

    case "UV": // UVs
        $selection = `filterExpand -selectionMask 35`;
        if (size($selection) == 0){
            error((uiRes("m_texCheckSelection.kNoUV")));
        }
        break;

    case "UV2": // TWO UVs only
        $selection = `filterExpand -selectionMask 35`;
        if (size($selection) != 2){
            error((uiRes("m_texCheckSelection.kNoTwoUV")));
        }
        break;

    case "meshUV": // Meshes or UVs
        $selection = `filterExpand -sm 12 -sm 35`;
        if (size($selection) == 0){
			error((uiRes("m_texCheckSelection.kNoMeshUV")));
        }
        break;

    case "multi": // Selection spans over multiple shells
        $selection = `ls -selection`;
        string $selectedUVs[] = `polyListComponentConversion -toUV`;

        // Expand to entire shells
        polySelectConstraint -mode 2 -shell 1 -type 0x0010;

        polySelectConstraint -disable;

        // Get one single UV from selectedUVs and convert to just ONE shell
        select $selectedUVs[0];
        polySelectConstraint -mode 2 -shell 1 -type 0x0010;

        polySelectConstraint -disable;

        break;
    }
}