/*******************************************/
/* class_board.cpp - BOARD class functions */
/*******************************************/
#include "fctsys.h"
#include "common.h"

#include "pcbnew.h"


/* This is an odd place for this, but cvpcb won't link if it is
 *  in class_board_item.cpp like I first tried it.
 */
wxPoint BOARD_ITEM::ZeroOffset( 0, 0 );


/*****************/
/* Class BOARD: */
/*****************/

/* Constructor */
BOARD::BOARD( EDA_BaseStruct* parent, WinEDA_BasePcbFrame* frame ) :
    BOARD_ITEM( (BOARD_ITEM*)parent, TYPE_PCB ),
    m_NetClasses( this )
{
    m_PcbFrame      = frame;
    m_Status_Pcb    = 0;                        // Mot d'etat: Bit 1 = Chevelu calcule
    m_BoardSettings = &g_DesignSettings;
    m_NbNodes     = 0;                          // nombre de pads connectes
    m_NbNoconnect = 0;                          // nombre de chevelus actifs

    m_CurrentZoneContour = NULL;                // This ZONE_CONTAINER handle the zone contour cuurently in progress
    m_NetInfo = new NETINFO_LIST( this );       // handle nets info list (name, design constraints ..
    m_NetInfo->BuildListOfNets();               // prepare pads and nets lists containers.

    for( int layer = 0; layer < NB_COPPER_LAYERS;  ++layer )
    {
        m_Layer[layer].m_Name = ReturnPcbLayerName( layer, true );
        m_Layer[layer].m_Type = LT_SIGNAL;
    }

    // Initial parameters for the default NETCLASS come from the global preferences
    // within g_DesignSettings via the NETCLASS() constructor.
    // Should user eventually load a board from a disk file, then these defaults
    // will get overwritten during load.
    m_NetClasses.GetDefault()->SetDescription( _( "This is the default net class." ) );
    m_CurrentNetClassName = m_NetClasses.GetDefault()->GetName( );
}


/***************/
/* Destructeur */
/***************/
BOARD::~BOARD()
{
    if( m_PcbFrame->GetScreen() )
        m_PcbFrame->GetScreen()->ClearUndoRedoList();

    while( m_ZoneDescriptorList.size() )
    {
        ZONE_CONTAINER* area_to_remove = m_ZoneDescriptorList[0];
        Delete( area_to_remove );
    }

    m_FullRatsnest.clear();

    m_LocalRatsnest.clear();

    DeleteMARKERs();
    DeleteZONEOutlines();

    delete m_CurrentZoneContour;
    m_CurrentZoneContour = NULL;

    delete m_NetInfo;
}


wxString BOARD::GetLayerName( int aLayerIndex ) const
{
    // copper layer names are stored in the BOARD.
    if( (unsigned) aLayerIndex < (unsigned) GetCopperLayerCount()
       || aLayerIndex == LAST_COPPER_LAYER )
    {
        // default names were set in BOARD::BOARD() but they may be
        // over-ridden by BOARD::SetLayerName()
        return m_Layer[aLayerIndex].m_Name;
    }

    return ReturnPcbLayerName( aLayerIndex, true );
}


bool BOARD::SetLayerName( int aLayerIndex, const wxString& aLayerName )
{
    if( (unsigned) aLayerIndex < (unsigned) GetCopperLayerCount()
       || aLayerIndex==LAST_COPPER_LAYER )
    {
        if( aLayerName == wxEmptyString  || aLayerName.Len() > 20 )
            return false;

        // no quote chars in the name allowed
        if( aLayerName.Find( wxChar( '"' ) ) != wxNOT_FOUND )
            return false;

        // ensure unique-ness of layer names
        for( int layer = 0;  layer<GetCopperLayerCount() || layer==LAST_COPPER_LAYER;  )
        {
            if( layer!=aLayerIndex && aLayerName == m_Layer[layer].m_Name )
                return false;

            if( ++layer == GetCopperLayerCount() )
                layer = LAST_COPPER_LAYER;
        }

        m_Layer[aLayerIndex].m_Name = aLayerName;

        // replace any spaces with underscores
        m_Layer[aLayerIndex].m_Name.Replace( wxT( " " ), wxT( "_" ) );

        return true;
    }

    return false;
}


LAYER_T BOARD::GetLayerType( int aLayerIndex ) const
{
    if( (unsigned) aLayerIndex < (unsigned) GetCopperLayerCount() )
        return m_Layer[aLayerIndex].m_Type;
    return LT_SIGNAL;
}


bool BOARD::SetLayerType( int aLayerIndex, LAYER_T aLayerType )
{
    if( (unsigned) aLayerIndex < (unsigned) GetCopperLayerCount() )
    {
        m_Layer[aLayerIndex].m_Type = aLayerType;
        return true;
    }
    return false;
}


const char* LAYER::ShowType( LAYER_T aType )
{
    const char* cp;

    switch( aType )
    {
    default:
    case LT_SIGNAL:
        cp = "signal";      break;

    case LT_POWER:
        cp = "power";       break;

    case LT_MIXED:
        cp = "mixed";       break;

    case LT_JUMPER:
        cp = "jumper";      break;
    }

    return cp;
}


LAYER_T LAYER::ParseType( const char* aType )
{
    if( strcmp( aType, "signal" ) == 0 )
        return LT_SIGNAL;
    else if( strcmp( aType, "power" ) == 0 )
        return LT_POWER;
    else if( strcmp( aType, "mixed" ) == 0 )
        return LT_MIXED;
    else if( strcmp( aType, "jumper" ) == 0 )
        return LT_JUMPER;
    else
        return LAYER_T( -1 );
}


int BOARD::GetCopperLayerCount() const
{
    return m_BoardSettings->m_CopperLayerCount;
}


wxPoint& BOARD::GetPosition()
{
    static wxPoint dummy( 0, 0 );

    return dummy;   // a reference
}


void BOARD::Add( BOARD_ITEM* aBoardItem, int aControl )
{
    if( aBoardItem == NULL )
    {
        wxFAIL_MSG( wxT( "BOARD::Add() param error: aBoardItem NULL" ) );
        return;
    }

    switch( aBoardItem->Type() )
    {
    // this one uses a vector
    case TYPE_MARKER_PCB:
        aBoardItem->SetParent( this );
        m_markers.push_back( (MARKER_PCB*) aBoardItem );
        break;

    // this one uses a vector
    case TYPE_ZONE_CONTAINER:
        aBoardItem->SetParent( this );
        m_ZoneDescriptorList.push_back( (ZONE_CONTAINER*) aBoardItem );
        break;

    case TYPE_TRACK:
    case TYPE_VIA:
    {
        TRACK* insertAid = ( (TRACK*) aBoardItem )->GetBestInsertPoint( this );
        m_Track.Insert( (TRACK*) aBoardItem, insertAid );
    }
    break;

    case TYPE_ZONE:
        if( aControl & ADD_APPEND )
            m_Zone.PushBack( (SEGZONE*) aBoardItem );
        else
            m_Zone.PushFront( (SEGZONE*) aBoardItem );
        aBoardItem->SetParent( this );
        break;

    case TYPE_MODULE:
        if( aControl & ADD_APPEND )
            m_Modules.PushBack( (MODULE*) aBoardItem );
        else
            m_Modules.PushFront( (MODULE*) aBoardItem );
        aBoardItem->SetParent( this );

        // Because the list of pads has changed, reset the status
        // This indicate the list of pad and nets must be recalculated before use
        m_Status_Pcb = 0;
        break;

    case TYPE_COTATION:
    case TYPE_DRAWSEGMENT:
    case TYPE_TEXTE:
    case TYPE_EDGE_MODULE:
    case TYPE_MIRE:
        if( aControl & ADD_APPEND )
            m_Drawings.PushBack( aBoardItem );
        else
            m_Drawings.PushFront( aBoardItem );
        aBoardItem->SetParent( this );
        break;

    // other types may use linked list
    default:
    {
        wxString msg;
        msg.Printf(
            wxT( "BOARD::Add() needs work: BOARD_ITEM type (%d) not handled" ),
            aBoardItem->Type() );
        wxFAIL_MSG( msg );
    }
    break;
    }
}


BOARD_ITEM* BOARD::Remove( BOARD_ITEM* aBoardItem )
{
    // find these calls and fix them!  Don't send me no stinkin' NULL.
    wxASSERT( aBoardItem );

    switch( aBoardItem->Type() )
    {
    case TYPE_MARKER_PCB:

        // find the item in the vector, then remove it
        for( unsigned i = 0;  i<m_markers.size();  ++i )
        {
            if( m_markers[i] == (MARKER_PCB*) aBoardItem )
            {
                m_markers.erase( m_markers.begin() + i );
                break;
            }
        }

        break;

    case TYPE_ZONE_CONTAINER:    // this one uses a vector
        // find the item in the vector, then delete then erase it.
        for( unsigned i = 0;  i<m_ZoneDescriptorList.size();  ++i )
        {
            if( m_ZoneDescriptorList[i] == (ZONE_CONTAINER*) aBoardItem )
            {
                m_ZoneDescriptorList.erase( m_ZoneDescriptorList.begin() + i );
                break;
            }
        }

        break;

    case TYPE_MODULE:
        m_Modules.Remove( (MODULE*) aBoardItem );
        break;

    case TYPE_TRACK:
    case TYPE_VIA:
        m_Track.Remove( (TRACK*) aBoardItem );
        break;

    case TYPE_ZONE:
        m_Zone.Remove( (SEGZONE*) aBoardItem );
        break;

    case TYPE_COTATION:
    case TYPE_DRAWSEGMENT:
    case TYPE_TEXTE:
    case TYPE_EDGE_MODULE:
    case TYPE_MIRE:
        m_Drawings.Remove( aBoardItem );
        break;

    // other types may use linked list
    default:
        wxFAIL_MSG( wxT( "BOARD::Remove() needs more ::Type() support" ) );
    }

    return aBoardItem;
}


void BOARD::DeleteMARKERs()
{
    // the vector does not know how to delete the MARKER_PCB, it holds pointers
    for( unsigned i = 0;  i<m_markers.size();  ++i )
        delete m_markers[i];

    m_markers.clear();
}


void BOARD::DeleteZONEOutlines()
{
    // the vector does not know how to delete the ZONE Outlines, it holds pointers
    for( unsigned i = 0;  i<m_ZoneDescriptorList.size();  ++i )
        delete m_ZoneDescriptorList[i];

    m_ZoneDescriptorList.clear();
}


/* Calculate the track segment count */
int BOARD::GetNumSegmTrack()
{
    return m_Track.GetCount();
}


/* Calculate the zone segment count */
int BOARD::GetNumSegmZone()
{
    return m_Zone.GetCount();
}


// return the unconnection count
unsigned BOARD::GetNoconnectCount()
{
    return m_NbNoconnect;
}


// return the active pad count ( pads with a netcode > 0 )
unsigned BOARD::GetNodesCount()
{
    return m_NbNodes;
}


/***********************************/
bool BOARD::ComputeBoundaryBox()
/***********************************/

/** Function ComputeBoundaryBox()
 * Calculate the bounding box of the board
 *  This box contains pcb edges, pads , vias and tracks
 *  Update m_PcbBox member
 *
 *  @return 0 for an empty board (no items), else 1
 */
{
    int             rayon, cx, cy, d, xmin, ymin, xmax, ymax;
    bool            hasItems = FALSE;
    EDA_BaseStruct* PtStruct;
    DRAWSEGMENT*    ptr;

    xmin = ymin = 0x7FFFFFFFl;
    xmax = ymax = -0x7FFFFFFFl;

    /* Analyse PCB edges*/
    PtStruct = m_Drawings;
    for( ; PtStruct != NULL; PtStruct = PtStruct->Next() )
    {
        if( PtStruct->Type() != TYPE_DRAWSEGMENT )
            continue;

        ptr = (DRAWSEGMENT*) PtStruct;
        d   = (ptr->m_Width / 2) + 1;

        if( ptr->m_Shape == S_CIRCLE )
        {
            cx       = ptr->m_Start.x; cy = ptr->m_Start.y;
            rayon    = (int) hypot( (double) ( ptr->m_End.x - cx ), (double) ( ptr->m_End.y - cy ) );
            rayon   += d;
            xmin     = MIN( xmin, cx - rayon );
            ymin     = MIN( ymin, cy - rayon );
            xmax     = MAX( xmax, cx + rayon );
            ymax     = MAX( ymax, cy + rayon );
            hasItems = TRUE;
        }
        else
        {
            cx       = MIN( ptr->m_Start.x, ptr->m_End.x );
            cy       = MIN( ptr->m_Start.y, ptr->m_End.y );
            xmin     = MIN( xmin, cx - d );
            ymin     = MIN( ymin, cy - d );
            cx       = MAX( ptr->m_Start.x, ptr->m_End.x );
            cy       = MAX( ptr->m_Start.y, ptr->m_End.y );
            xmax     = MAX( xmax, cx + d );
            ymax     = MAX( ymax, cy + d );
            hasItems = TRUE;
        }
    }

    /* Analyse footprints  */

    for( MODULE* module = m_Modules;  module;  module = module->Next() )
    {
        hasItems = TRUE;
        xmin     = MIN( xmin, ( module->m_Pos.x + module->m_BoundaryBox.GetX() ) );
        ymin     = MIN( ymin, ( module->m_Pos.y + module->m_BoundaryBox.GetY() ) );
        xmax     = MAX( xmax, module->m_Pos.x + module->m_BoundaryBox.GetRight() );
        ymax     = MAX( ymax, module->m_Pos.y + module->m_BoundaryBox.GetBottom() );


        for( D_PAD* pt_pad = module->m_Pads;  pt_pad;  pt_pad = pt_pad->Next() )
        {
            const wxPoint& pos = pt_pad->GetPosition();

            d    = pt_pad->m_Rayon;
            xmin = MIN( xmin, pos.x - d );
            ymin = MIN( ymin, pos.y - d );
            xmax = MAX( xmax, pos.x + d );
            ymax = MAX( ymax, pos.y + d );
        }
    }

    /* Analyse track and zones */
    for( TRACK* track = m_Track;  track;  track = track->Next() )
    {
        d        = (track->m_Width / 2) + 1;
        cx       = MIN( track->m_Start.x, track->m_End.x );
        cy       = MIN( track->m_Start.y, track->m_End.y );
        xmin     = MIN( xmin, cx - d );
        ymin     = MIN( ymin, cy - d );
        cx       = MAX( track->m_Start.x, track->m_End.x );
        cy       = MAX( track->m_Start.y, track->m_End.y );
        xmax     = MAX( xmax, cx + d );
        ymax     = MAX( ymax, cy + d );
        hasItems = TRUE;
    }

    for( TRACK* track = m_Zone;  track;  track = track->Next() )
    {
        d        = (track->m_Width / 2) + 1;
        cx       = MIN( track->m_Start.x, track->m_End.x );
        cy       = MIN( track->m_Start.y, track->m_End.y );
        xmin     = MIN( xmin, cx - d );
        ymin     = MIN( ymin, cy - d );
        cx       = MAX( track->m_Start.x, track->m_End.x );
        cy       = MAX( track->m_Start.y, track->m_End.y );
        xmax     = MAX( xmax, cx + d );
        ymax     = MAX( ymax, cy + d );
        hasItems = TRUE;
    }

    if( !hasItems && m_PcbFrame )
    {
        if( m_PcbFrame->m_Draw_Sheet_Ref )
        {
            xmin = ymin = 0;
            xmax = m_PcbFrame->GetScreen()->ReturnPageSize().x;
            ymax = m_PcbFrame->GetScreen()->ReturnPageSize().y;
        }
        else
        {
            xmin = -m_PcbFrame->GetScreen()->ReturnPageSize().x / 2;
            ymin = -m_PcbFrame->GetScreen()->ReturnPageSize().y / 2;
            xmax = m_PcbFrame->GetScreen()->ReturnPageSize().x / 2;
            ymax = m_PcbFrame->GetScreen()->ReturnPageSize().y / 2;
        }
    }

    m_BoundaryBox.SetX( xmin );
    m_BoundaryBox.SetY( ymin );
    m_BoundaryBox.SetWidth( xmax - xmin );
    m_BoundaryBox.SetHeight( ymax - ymin );

    return hasItems;
}


// virtual, see pcbstruct.h
void BOARD::DisplayInfo( WinEDA_DrawFrame* frame )
{
/* Affiche l'etat du PCB : nb de pads, nets , connexions.. */
#define POS_AFF_NBPADS      1
#define POS_AFF_NBVIAS      8
#define POS_AFF_NBNODES     16
#define POS_AFF_NBNETS      24
#define POS_AFF_NBLINKS     32
#define POS_AFF_NBCONNECT   40
#define POS_AFF_NBNOCONNECT 48

    wxString txt;

    frame->MsgPanel->EraseMsgBox();


    int viasCount = 0;
    for( BOARD_ITEM* item = m_Track;  item;  item = item->Next() )
    {
        if( item->Type() == TYPE_VIA )
            viasCount++;
    }

    txt.Printf( wxT( "%d" ), GetPadsCount() );
    Affiche_1_Parametre( frame, POS_AFF_NBPADS, _( "Pads" ), txt, DARKGREEN );

    txt.Printf( wxT( "%d" ), viasCount );
    Affiche_1_Parametre( frame, POS_AFF_NBVIAS, _( "Vias" ), txt, DARKGREEN );

    txt.Printf( wxT( "%d" ), GetNodesCount() );
    Affiche_1_Parametre( frame, POS_AFF_NBNODES, _( "Nodes" ), txt, DARKCYAN );

    txt.Printf( wxT( "%d" ), m_NetInfo->GetCount() );
    Affiche_1_Parametre( frame, POS_AFF_NBNETS, _( "Nets" ), txt, RED );

    /* These parameters are known only if the full ratsnest is available,
     *  so, display them only if this is the case
     */
    if( (m_Status_Pcb & NET_CODES_OK) )
    {
        txt.Printf( wxT( "%d" ), GetRatsnestsCount() );
        Affiche_1_Parametre( frame, POS_AFF_NBLINKS, _( "Links" ), txt, DARKGREEN );

        txt.Printf( wxT( "%d" ), GetRatsnestsCount() - GetNoconnectCount() );
        Affiche_1_Parametre( frame, POS_AFF_NBCONNECT, _( "Connect" ), txt, DARKGREEN );

        txt.Printf( wxT( "%d" ), GetNoconnectCount() );
        Affiche_1_Parametre( frame, POS_AFF_NBNOCONNECT, _( "NoConn" ), txt, BLUE );
    }
}


// virtual, see pcbstruct.h
SEARCH_RESULT BOARD::Visit( INSPECTOR* inspector, const void* testData,
                            const KICAD_T scanTypes[] )
{
    KICAD_T        stype;
    SEARCH_RESULT  result = SEARCH_CONTINUE;
    const KICAD_T* p    = scanTypes;
    bool           done = false;

#if 0 && defined(DEBUG)
    std::cout << GetClass().mb_str() << ' ';
#endif

    while( !done )
    {
        stype = *p;
        switch( stype )
        {
        case TYPE_PCB:
            result = inspector->Inspect( this, testData );  // inspect me
            // skip over any types handled in the above call.
            ++p;
            break;

        /*  Instances of the requested KICAD_T live in a list, either one
         *   that I manage, or that my modules manage.  If it's a type managed
         *   by class MODULE, then simply pass it on to each module's
         *   MODULE::Visit() function by way of the
         *   IterateForward( m_Modules, ... ) call.
         */

        case TYPE_MODULE:
        case TYPE_PAD:
        case TYPE_TEXTE_MODULE:
        case TYPE_EDGE_MODULE:

            // this calls MODULE::Visit() on each module.
            result = IterateForward( m_Modules, inspector, testData, p );

            // skip over any types handled in the above call.
            for( ; ; )
            {
                switch( stype = *++p )
                {
                case TYPE_MODULE:
                case TYPE_PAD:
                case TYPE_TEXTE_MODULE:
                case TYPE_EDGE_MODULE:
                    continue;

                default:
                    ;
                }

                break;
            }

            break;

        case TYPE_DRAWSEGMENT:
        case TYPE_TEXTE:
        case TYPE_COTATION:
        case TYPE_MIRE:
            result = IterateForward( m_Drawings, inspector, testData, p );

            // skip over any types handled in the above call.
            for( ; ; )
            {
                switch( stype = *++p )
                {
                case TYPE_DRAWSEGMENT:
                case TYPE_TEXTE:
                case TYPE_COTATION:
                case TYPE_MIRE:
                    continue;

                default:
                    ;
                }

                break;
            }

            ;
            break;

#if 0       // both these are on same list, so we must scan it twice in order to get VIA priority,
        // using new #else code below.
        // But we are not using separte lists for TRACKs and SEGVIAs, because items are ordered (sortered) in the linked
        // list by netcode AND by physical distance:
        // when created, if a track or via is connected to an existing track or via, it is put in linked list
        // after this existing track or via
        // So usually, connected tracks or vias are grouped in this list
        // So the algorithm (used in rastnest computations) which computes the track connectivity is faster (more than 100 time regarding to
        // a non ordered list) because when it searchs for a connexion, first it tests the near (near in term of linked list) 50 items
        // from the current item (track or via) in test.
        // Usually, because of this sort, a connected item (if exists) is found.
        // If not found (and only in this case) an exhaustive (and time consumming) search is made,
        // but this case is statistically rare.
        case TYPE_VIA:
        case TYPE_TRACK:
            result = IterateForward( m_Track, inspector, testData, p );

            // skip over any types handled in the above call.
            for( ; ; )
            {
                switch( stype = *++p )
                {
                case TYPE_VIA:
                case TYPE_TRACK:
                    continue;

                default:
                    ;
                }

                break;
            }

            break;

#else
        case TYPE_VIA:
            result = IterateForward( m_Track, inspector, testData, p );
            ++p;
            break;

        case TYPE_TRACK:
            result = IterateForward( m_Track, inspector, testData, p );
            ++p;
            break;
#endif

        case TYPE_MARKER_PCB:

            // MARKER_PCBS are in the m_markers std::vector
            for( unsigned i = 0;  i<m_markers.size();  ++i )
            {
                result = m_markers[i]->Visit( inspector, testData, p );
                if( result == SEARCH_QUIT )
                    break;
            }

            ++p;
            break;

        case TYPE_ZONE_CONTAINER:

            // TYPE_ZONE_CONTAINER are in the m_ZoneDescriptorList std::vector
            for( unsigned i = 0;  i< m_ZoneDescriptorList.size();  ++i )
            {
                result = m_ZoneDescriptorList[i]->Visit( inspector, testData, p );
                if( result == SEARCH_QUIT )
                    break;
            }

            ++p;
            break;

        case TYPE_ZONE:
            result = IterateForward( m_Zone, inspector, testData, p );
            ++p;
            break;

        default:        // catch EOT or ANY OTHER type here and return.
            done = true;
            break;
        }

        if( result == SEARCH_QUIT )
            break;
    }

    return result;
}


/*  now using PcbGeneralLocateAndDisplay(), but this remains a useful example
 *   of how the INSPECTOR can be used in a lightweight way.
 *  // see pcbstruct.h
 *  BOARD_ITEM* BOARD::FindPadOrModule( const wxPoint& refPos, int layer )
 *  {
 *   class PadOrModule : public INSPECTOR
 *   {
 *   public:
 *       BOARD_ITEM*         found;
 *       int                 layer;
 *       int                 layer_mask;
 *
 *       PadOrModule( int alayer ) :
 *           found(0), layer(alayer), layer_mask( g_TabOneLayerMask[alayer] )
 *       {}
 *
 *       SEARCH_RESULT Inspect( EDA_BaseStruct* testItem, const void* testData )
 *       {
 *           BOARD_ITEM*     item   = (BOARD_ITEM*) testItem;
 *           const wxPoint&  refPos = *(const wxPoint*) testData;
 *
 *           if( item->Type() == TYPE_PAD )
 *           {
 *               D_PAD*  pad = (D_PAD*) item;
 *               if( pad->HitTest( refPos ) )
 *               {
 *                   if( layer_mask & pad->m_Masque_Layer )
 *                   {
 *                       found = item;
 *                       return SEARCH_QUIT;
 *                   }
 *                   else if( !found )
 *                   {
 *                       MODULE* parent = (MODULE*) pad->m_Parent;
 *                       if( IsModuleLayerVisible( parent->GetLayer() ) )
 *                           found = item;
 *                   }
 *               }
 *           }
 *
 *           else if( item->Type() == TYPE_MODULE )
 *           {
 *               MODULE* module = (MODULE*) item;
 *
 *               // consider only visible modules
 *               if( IsModuleLayerVisible( module->GetLayer() ) )
 *               {
 *                   if( module->HitTest( refPos ) )
 *                   {
 *                       if( layer == module->GetLayer() )
 *                       {
 *                           found = item;
 *                           return SEARCH_QUIT;
 *                       }
 *
 *                       // layer mismatch, save in case we don't find a
 *                       // future layer match hit.
 *                       if( !found )
 *                           found = item;
 *                   }
 *               }
 *           }
 *           return SEARCH_CONTINUE;
 *       }
 *   };
 *
 *   PadOrModule inspector( layer );
 *
 *   // search only for PADs first, then MODULES, and preferably a layer match
 *   static const KICAD_T scanTypes[] = { TYPE_PAD, TYPE_MODULE, EOT };
 *
 *   // visit this BOARD with the above inspector
 *   Visit( &inspector, &refPos, scanTypes );
 *
 *   return inspector.found;
 *  }
 */


/**
 * Function FindNet
 * searches for a net with the given netcode.
 * @param anetcode The netcode to search for.
 * @return NETINFO_ITEM* - the net or NULL if not found.
 */
NETINFO_ITEM* BOARD::FindNet( int anetcode ) const
{
    // the first valid netcode is 1 and the last is m_NetInfo->GetCount()-1.
    // zero is reserved for "no connection" and is not used.
    // NULL is returned for non valid netcodes
    NETINFO_ITEM* net = m_NetInfo->GetNetItem( anetcode );

#if defined(DEBUG)
    if( net )     // item can be NULL if anetcode is not valid
    {
        if( anetcode != net->GetNet() )
        {
           printf("FindNet() anetcode %d != GetNet() %d\n", anetcode, net->GetNet());
        }
    }
#endif

    return net;
}


/**
 * Function FindNet overlayed
 * searches for a net with the given name.
 * @param aNetname A Netname to search for.
 * @return NETINFO_ITEM* - the net or NULL if not found.
 */
NETINFO_ITEM* BOARD::FindNet( const wxString& aNetname ) const
{
    // the first valid netcode is 1.
    // zero is reserved for "no connection" and is not used.
    if( aNetname.IsEmpty() )
        return NULL;

    int ncount = m_NetInfo->GetCount();

    // Search for a netname = aNetname
#if 0

    // Use a sequencial search: easy to understand, but slow
    for( int ii = 1; ii < ncount;  ii++ )
    {
        NETINFO_ITEM* item = m_NetInfo->GetNetItem( ii );
        if( item && item->GetNetname() == aNetname )
        {
            return item;
        }
    }

#else

    // Use a fast binary search,
    // this is possible because Nets are alphabetically ordered in list
    // see NETINFO_LIST::BuildListOfNets() and NETINFO_LIST::Build_Pads_Full_List()
    int imax  = ncount - 1;
    int index = imax;
    while( ncount > 0 )
    {
        int ii = ncount;
        ncount >>= 1;

        if( (ii & 1) && ( ii > 1 ) )
            ncount++;

        NETINFO_ITEM* item = m_NetInfo->GetNetItem( index );
        if( item == NULL )
            return NULL;
        int           icmp = item->GetNetname().Cmp( aNetname );

        if( icmp == 0 ) // found !
        {
            return item;
        }
        if( icmp < 0 ) // must search after item
        {
            index += ncount;
            if( index > imax )
                index = imax;
            continue;
        }
        if( icmp > 0 ) // must search before item
        {
            index -= ncount;
            if( index < 1 )
                index = 1;
            continue;
        }
    }

#endif
    return NULL;
}


MODULE* BOARD::FindModuleByReference( const wxString& aReference ) const
{
    struct FindModule : public INSPECTOR
    {
        MODULE* found;
        FindModule() : found( 0 )  {}

        // implement interface INSPECTOR
        SEARCH_RESULT Inspect( EDA_BaseStruct* item, const void* data )
        {
            MODULE*         module = (MODULE*) item;
            const wxString& ref    = *(const wxString*) data;

            if( ref == module->GetReference() )
            {
                found = module;
                return SEARCH_QUIT;
            }
            return SEARCH_CONTINUE;
        }
    } inspector;

    // search only for MODULES
    static const KICAD_T scanTypes[] = { TYPE_MODULE, EOT };

    // visit this BOARD with the above inspector
    BOARD* nonconstMe = (BOARD*) this;
    nonconstMe->Visit( &inspector, &aReference, scanTypes );

    return inspector.found;
}


// Sort nets by decreasing pad count
static bool s_SortByNodes( const NETINFO_ITEM* a, const NETINFO_ITEM* b )
{
    return b->GetNodesCount() < a->GetNodesCount();
}


/**
 * Function ReturnSortedNetnamesList
 * @param aNames An array string to fill with net names.
 * @param aSortbyPadsCount : true = sort by active pads count, false = no sort (i.e. leave the sort by net names)
 * @return int - net names count.
 */
int BOARD::ReturnSortedNetnamesList( wxArrayString& aNames, bool aSortbyPadsCount )
{
    if( m_NetInfo->GetCount() == 0 )
        return 0;

    // Build the list
    std::vector <NETINFO_ITEM*> netBuffer;

    netBuffer.reserve( m_NetInfo->GetCount() );

    for( unsigned ii = 1; ii < m_NetInfo->GetCount(); ii++ )
    {
        if( m_NetInfo->GetNetItem( ii )->GetNet() > 0 )
            netBuffer.push_back( m_NetInfo->GetNetItem( ii ) );
    }

    // sort the list
    if( aSortbyPadsCount )
        sort( netBuffer.begin(), netBuffer.end(), s_SortByNodes );

    for( unsigned ii = 0; ii <  netBuffer.size(); ii++ )
        aNames.Add( netBuffer[ii]->GetNetname() );

    return netBuffer.size();
}


/************************************/
bool BOARD::Save( FILE* aFile ) const
/************************************/
{
    bool        rc = false;
    BOARD_ITEM* item;

    // save the nets
    for( unsigned ii = 0; ii < m_NetInfo->GetCount(); ii++ )
        if( !m_NetInfo->GetNetItem( ii )->Save( aFile ) )
            goto out;

    // Saved nets do not include netclass names, so save netclasses after nets.
    m_NetClasses.Save( aFile );

    // save the modules
    for( item = m_Modules;  item;  item = item->Next() )
        if( !item->Save( aFile ) )
            goto out;

    for( item = m_Drawings;  item;  item = item->Next() )
    {
        switch( item->Type() )
        {
        case TYPE_TEXTE:
        case TYPE_DRAWSEGMENT:
        case TYPE_MIRE:
        case TYPE_COTATION:
            if( !item->Save( aFile ) )
                goto out;
            break;

        default:

            // future: throw exception here
#if defined(DEBUG)
            printf( "BOARD::Save() ignoring m_Drawings type %d\n", item->Type() );
#endif
            break;
        }
    }

    // do not save MARKER_PCBs, they can be regenerated easily

    // save the tracks & vias
    fprintf( aFile, "$TRACK\n" );
    for( item = m_Track;  item;  item = item->Next() )
        if( !item->Save( aFile ) )
            goto out;

    fprintf( aFile, "$EndTRACK\n" );

    // save the zones
    fprintf( aFile, "$ZONE\n" );
    for( item = m_Zone;  item;  item = item->Next() )
        if( !item->Save( aFile ) )
            goto out;

    fprintf( aFile, "$EndZONE\n" );

    // save the zone edges
    for( unsigned ii = 0; ii < m_ZoneDescriptorList.size(); ii++ )
    {
        ZONE_CONTAINER* edge_zone = m_ZoneDescriptorList[ii];
        edge_zone->Save( aFile );
    }


    if( fprintf( aFile, "$EndBOARD\n" ) != sizeof("$EndBOARD\n") - 1 )
        goto out;

    rc = true;  // wrote all OK

out:
    return rc;
}


/***********************************************************************************************/
void BOARD::RedrawAreasOutlines( WinEDA_DrawPanel* panel, wxDC* aDC, int aDrawMode, int aLayer )
/***********************************************************************************************/

/**
 * Function RedrawAreasOutlines
 * Redraw all areas outlines on layer aLayer ( redraw all if aLayer < 0 )
 */
{
    if( !aDC )
        return;

    for( int ii = 0; ii < GetAreaCount(); ii++ )
    {
        ZONE_CONTAINER* edge_zone = GetArea( ii );
        if( (aLayer < 0) || ( aLayer == edge_zone->GetLayer() ) )
            edge_zone->Draw( panel, aDC, aDrawMode );
    }
}


/***********************************************************************************************/
void BOARD::RedrawFilledAreas( WinEDA_DrawPanel* panel, wxDC* aDC, int aDrawMode, int aLayer )
/***********************************************************************************************/

/**
 * Function RedrawFilledAreas
 * Redraw all areas outlines on layer aLayer ( redraw all if aLayer < 0 )
 */
{
    if( !aDC )
        return;

    for( int ii = 0; ii < GetAreaCount(); ii++ )
    {
        ZONE_CONTAINER* edge_zone = GetArea( ii );
        if( (aLayer < 0) || ( aLayer == edge_zone->GetLayer() ) )
            edge_zone->DrawFilledArea( panel, aDC, aDrawMode );
    }
}


/**
 * Function HitTestForAnyFilledArea
 * tests if the given wxPoint is within the bounds of a filled area of this zone.
 * the test is made on zones on layer from aStartLayer to aEndLayer
 * Note: if a zone has its flag BUSY (in .m_State) is set, it is ignored.
 * @param refPos A wxPoint to test
 * @param aStartLayer the first layer to test
 * @param aEndLayer the last layer (-1 to ignore it) to test
 * @return ZONE_CONTAINER* return a pointer to the ZONE_CONTAINER found, else NULL
 */
ZONE_CONTAINER* BOARD::HitTestForAnyFilledArea( const wxPoint& aRefPos,
                                                int            aStartLayer,
                                                int            aEndLayer )
{
    if( aEndLayer < 0 )
        aEndLayer = aStartLayer;
    if( aEndLayer <  aStartLayer )
        EXCHG( aEndLayer, aStartLayer );

    for( unsigned ia = 0; ia < m_ZoneDescriptorList.size(); ia++ )
    {
        ZONE_CONTAINER* area  = m_ZoneDescriptorList[ia];
        int             layer = area->GetLayer();
        if( (layer < aStartLayer) || (layer > aEndLayer) )
            continue;
        if( area->GetState( BUSY ) )      // In locate functions we must skip tagged items with BUSY flag set.
            continue;
        if( area->HitTestFilledArea( aRefPos ) )
            return area;
    }

    return NULL;
}


/**
 * Function SetAreasNetCodesFromNetNames
 * Set the .m_NetCode member of all copper areas, according to the area Net Name
 * The SetNetCodesFromNetNames is an equivalent to net name, for fast comparisons.
 * However the Netcode is an arbitrary equivalence, it must be set after each netlist read
 * or net change
 * Must be called after pad netcodes are calculated
 * @return : error count
 * For non copper areas, netcode is set to 0
 */
int BOARD::SetAreasNetCodesFromNetNames( void )
{
    int error_count = 0;

    for( int ii = 0; ii < GetAreaCount(); ii++ )
    {
        if( !GetArea( ii )->IsOnCopperLayer() )
        {
            GetArea( ii )->SetNet( 0 );
            continue;
        }

        if( GetArea( ii )->GetNet() != 0 )      // i.e. if this zone is connected to a net
        {
            const NETINFO_ITEM* net = FindNet( GetArea( ii )->m_Netname );
            if( net )
            {
                GetArea( ii )->SetNet( net->GetNet() );
            }
            else
            {
                error_count++;
                GetArea( ii )->SetNet( -1 );    //keep Net Name ane set m_NetCode to -1 : error flag
            }
        }
    }

    return error_count;
}


#if defined(DEBUG)

/**
 * Function Show
 * is used to output the object tree, currently for debugging only.
 * @param nestLevel An aid to prettier tree indenting, and is the level
 *          of nesting of this object within the overall tree.
 * @param os The ostream& to output to.
 */
void BOARD::Show( int nestLevel, std::ostream& os )
{
    BOARD_ITEM* p;

    // for now, make it look like XML:
    NestedSpace( nestLevel, os ) << '<' << GetClass().Lower().mb_str() << ">\n";

    // specialization of the output:
    NestedSpace( nestLevel + 1, os ) << "<modules>\n";
    p = m_Modules;
    for( ; p; p = p->Next() )
        p->Show( nestLevel + 2, os );

    NestedSpace( nestLevel + 1, os ) << "</modules>\n";

    NestedSpace( nestLevel + 1, os ) << "<pdrawings>\n";
    p = m_Drawings;
    for( ; p; p = p->Next() )
        p->Show( nestLevel + 2, os );

    NestedSpace( nestLevel + 1, os ) << "</pdrawings>\n";

    NestedSpace( nestLevel + 1, os ) << "<tracks>\n";
    p = m_Track;
    for( ; p; p = p->Next() )
        p->Show( nestLevel + 2, os );

    NestedSpace( nestLevel + 1, os ) << "</tracks>\n";

    NestedSpace( nestLevel + 1, os ) << "<zones>\n";
    p = m_Zone;
    for( ; p; p = p->Next() )
        p->Show( nestLevel + 2, os );

    NestedSpace( nestLevel + 1, os ) << "</zones>\n";

    /*
     *  NestedSpace( nestLevel+1, os ) << "<zone_container>\n";
     *  for( ZONE_CONTAINERS::iterator i=m_ZoneDescriptorList.begin();  i!=m_ZoneDescriptorList.end();  ++i )
     *   (*i)->Show( nestLevel+2, os );
     *  NestedSpace( nestLevel+1, os ) << "</zone_container>\n";
     */

    p = (BOARD_ITEM*) m_Son;
    for( ; p;  p = p->Next() )
    {
        p->Show( nestLevel + 1, os );
    }

    NestedSpace( nestLevel, os ) << "</" << GetClass().Lower().mb_str() << ">\n";
}


#endif