/********************************************************/
/* Effacements : Routines de sauvegarde et d'effacement */
/********************************************************/

#include "fctsys.h"

#include "common.h"
#include "gerbview.h"

#include "protos.h"

/* Routines externes : */

/* Routines Locales */

/***********************************************/
void WinEDA_GerberFrame::UnDeleteItem( wxDC* DC )
/***********************************************/

/* Restitution d'un element (MODULE ou TRACK ) Efface
 */
{
    BOARD_ITEM*     item;
    BOARD_ITEM*     next;
    int             net_code;

    if( !g_UnDeleteStackPtr )
        return;

    g_UnDeleteStackPtr--;
    item = g_UnDeleteStack[g_UnDeleteStackPtr];
    if( item == NULL )
        return;                     // Ne devrait pas se produire

    switch( item->Type() )
    {
    case TYPEVIA:
    case TYPETRACK:
        for( ; item; item = next )
        {
            next = item->Next();
            item->SetState( DELETED, OFF );     /* Effacement du bit DELETED */
            Trace_Segment( DrawPanel, DC, (TRACK*) item, GR_OR );
        }

        item = g_UnDeleteStack[g_UnDeleteStackPtr];
        net_code = ((TRACK*) item)->GetNet();

        m_Pcb->Add( item );

        g_UnDeleteStack[g_UnDeleteStackPtr] = NULL;
        break;

    default:
        DisplayError( this, wxT( "Undelete struct: type Struct inattendu" ) );
        break;
    }
}


/********************************************************************/
BOARD_ITEM* SaveItemEfface( BOARD_ITEM* PtItem, int nbitems )
/********************************************************************/

/* Sauvegarde d'un element aux fins de restitution par Undelete
 *  Supporte actuellement : Module et segments de piste
 */
{
    BOARD_ITEM*     NextS, * PtStruct = PtItem;
    int             ii;

    if( (PtItem == NULL) || (nbitems == 0) )
        return NULL;

    if( g_UnDeleteStackPtr >= UNDELETE_STACK_SIZE )
    {
        /* Delete last deleted item, and shift stack. */
        g_UnDeleteStack[0]->DeleteStructure();
        for( ii = 0; ii < (g_UnDeleteStackPtr - 1); ii++ )
        {
            g_UnDeleteStack[ii] = g_UnDeleteStack[ii + 1];
        }

        g_UnDeleteStackPtr--;;
    }
    g_UnDeleteStack[g_UnDeleteStackPtr++] = PtItem;

    switch( PtStruct->Type() )
    {
    case TYPEVIA:
    case TYPETRACK:
    {
        EDA_BaseStruct* Back = NULL;
        g_UnDeleteStack[g_UnDeleteStackPtr - 1] = PtStruct;

        for( ; nbitems > 0; nbitems--, PtStruct = NextS )
        {
            NextS = PtStruct->Next();
            ( (TRACK*) PtStruct )->UnLink();

            PtStruct->SetState( DELETED, ON );
            if( nbitems <= 1 )
                NextS = NULL;                       /* fin de chaine */
            PtStruct->Pnext = NextS;
            PtStruct->Pback = Back; Back = PtStruct;
            if( NextS == NULL )
                break;
        }
    }
        break;

    default:
        break;
    }

    return g_UnDeleteStack[g_UnDeleteStackPtr - 1];
}