0027104: DownCast() cannot return null for mismatched handle

[occt.git] / src / IGESSelect / IGESSelect_SignColor.cxx

// Copyright (c) 1999-2014 OPEN CASCADE SAS
//
// This file is part of Open CASCADE Technology software library.
//
// This library is free software; you can redistribute it and/or modify it under
// the terms of the GNU Lesser General Public License version 2.1 as published
// by the Free Software Foundation, with special exception defined in the file
// OCCT_LGPL_EXCEPTION.txt. Consult the file LICENSE_LGPL_21.txt included in OCCT
// distribution for complete text of the license and disclaimer of any warranty.
//
// Alternatively, this file may be used under the terms of Open CASCADE
// commercial license or contractual agreement.


#include <IGESData_IGESEntity.hxx>
#include <IGESGraph_Color.hxx>
#include <IGESSelect_SignColor.hxx>
#include <Interface_InterfaceModel.hxx>
#include <Interface_Macros.hxx>
#include <Standard_Transient.hxx>
#include <Standard_Type.hxx>
#include <TCollection_AsciiString.hxx>
#include <TCollection_HAsciiString.hxx>

IMPLEMENT_STANDARD_RTTIEXT(IGESSelect_SignColor,IFSelect_Signature)

static TCollection_AsciiString valbuf;  // to prepare value and keep some time

static Standard_CString ColName (const Standard_Integer mode)
{
  switch (mode) {
    case 2 : return "IGES Color Name";
    case 3 : return "IGES Color R,G,B";
    case 4 : return "IGES Color RED Value";
    case 5 : return "IGES Color GREEN Value";
    case 6 : return "IGES Color BLUE Value";
    default : return "IGES Color Number";
  }
}

IGESSelect_SignColor::IGESSelect_SignColor  (const Standard_Integer mode)
: IFSelect_Signature (ColName(mode)) , themode(mode)
{  if (mode == 4 || mode == 5 || mode == 6) SetIntCase (Standard_True,0,Standard_True,0);  }

Standard_CString  IGESSelect_SignColor::Value
  (const Handle(Standard_Transient)& ent,
   const Handle(Interface_InterfaceModel)& model) const
{
  Standard_Real red = -1 , green = -1 , blue = -1;
  DeclareAndCast(IGESData_IGESEntity,igesent,ent);
  if (igesent.IsNull()) return "";
  Standard_Integer rank = igesent->RankColor();
  DeclareAndCast(IGESGraph_Color,color,igesent->Color());
  valbuf.Clear();

//  Color Number
  if (themode < 2 || themode > 6) {
    if (rank == 0) return "(none)";
    if (rank > 0) {
      valbuf.AssignCat ("S");
      valbuf.AssignCat (IFSelect_Signature::IntValue (rank));
    } else {
      Standard_Integer num = (model.IsNull() ? 0 : 2 * model->Number(color) - 1);
      valbuf.AssignCat ("D");
      valbuf.AssignCat (IFSelect_Signature::IntValue (num));
    }

//  Color Name
  } else if (themode == 2) {
    switch (rank) {
      case 0 : return "(none)";
      case 1 : return "BLACK";
      case 2 : return "RED";
      case 3 : return "GREEN";
      case 4 : return "BLUE";
      case 5 : return "YELLOW";
      case 6 : return "MAGENTA";
      case 7 : return "CYAN";
      case 8 : return "WHITE";
      default : if (rank > 0) return "Unknown Number";
    }
    Handle(TCollection_HAsciiString) name;
    if (!color.IsNull()) name = color->ColorName();
    if (!name.IsNull()) return name->ToCString();
    Standard_Integer num = (model.IsNull() ? 0 : 2 * model->Number(color) - 1);
    valbuf.AssignCat ("D");
    valbuf.AssignCat (IFSelect_Signature::IntValue (num));

//  RGB
  } else if (themode == 3) {
    switch (rank) {
      case 0 : return "";
      case 1 : return "0,0,0";
      case 2 : return "100,0,0";
      case 3 : return "0,100,0";
      case 4 : return "0,0,100";
      case 5 : return "100,100,0";
      case 6 : return "100,0,100";
      case 7 : return "0,100,100";
      case 8 : return "100,100,100";
      default : if (rank > 0) return "";
    }
    if (!color.IsNull()) color->RGBIntensity (red,green,blue);
    if (red >= 0) valbuf.AssignCat ( IFSelect_Signature::IntValue (int(red)) );
    valbuf.AssignCat (",");
    if (green >= 0) valbuf.AssignCat (IFSelect_Signature::IntValue (int(green)) );
    valbuf.AssignCat (",");
    if (blue >= 0) valbuf.AssignCat ( IFSelect_Signature::IntValue (int(blue)) );

//  RED value
  } else if (themode == 4) {
    switch (rank) {
      case 0 : return "";
      case 1 : return "0";
      case 2 : return "100";
      case 3 : return "0";
      case 4 : return "0";
      case 5 : return "100";
      case 6 : return "100";
      case 7 : return "0";
      case 8 : return "100";
      default : if (rank > 0) return "";
    }
    if (!color.IsNull()) color->RGBIntensity (red,green,blue);
    if (red >= 0) return IFSelect_Signature::IntValue (int(red));

//  GREEN Value
  } else if (themode == 5) {
    switch (rank) {
      case 0 : return "";
      case 1 : return "0";
      case 2 : return "0";
      case 3 : return "100";
      case 4 : return "0";
      case 5 : return "100";
      case 6 : return "0";
      case 7 : return "100";
      case 8 : return "100";
      default : if (rank > 0) return "";
    }
    if (!color.IsNull()) color->RGBIntensity (red,green,blue);
    if (green >= 0) return IFSelect_Signature::IntValue (int(green));

//  BLUE Value
  } else if (themode == 6) {
    switch (rank) {
      case 0 : return "";
      case 1 : return "0";
      case 2 : return "0";
      case 3 : return "0";
      case 4 : return "100";
      case 5 : return "0";
      case 6 : return "100";
      case 7 : return "100";
      case 8 : return "100";
      default : if (rank > 0) return "";
    }
    if (!color.IsNull()) color->RGBIntensity (red,green,blue);
    if (blue >= 0) return IFSelect_Signature::IntValue (int(blue));
  }

  return valbuf.ToCString();
}