/************************************/
/* Delete.cpp: routines d'effacement */
/************************************/

#include "fctsys.h"
#include "gr_basic.h"

#include "common.h"

#include "program.h"
#include "libcmp.h"
#include "general.h"

#include "protos.h"


/********************************************************************************/
static int CountConnectedItems( WinEDA_SchematicFrame* frame,
                                SCH_ITEM* ListStruct, wxPoint pos, bool TstJunction )
/********************************************************************************/

/*  Count number of items connected to point pos :
  *     pins, end wire or bus, and junctions if TstJunction == TRUE
  * Return this count
 *
  * Used by WinEDA_SchematicFrame::DeleteConnection()
 */
{
    SCH_ITEM* Struct;
    int             count = 0;

    if( frame->LocatePinEnd( ListStruct, pos ) )
        count++;

    for( Struct = ListStruct; Struct != NULL; Struct = Struct->Next() )
    {
        if( Struct->m_Flags & STRUCT_DELETED )
            continue;
        if( Struct->m_Flags & SKIP_STRUCT )
            continue;


        if( TstJunction && (Struct->Type() == DRAW_JUNCTION_STRUCT_TYPE) )
        {
            #define JUNCTION ( (DrawJunctionStruct*) Struct )
            if( (JUNCTION->m_Pos.x == pos.x) && (JUNCTION->m_Pos.y == pos.y) )
                count++;
            #undef JUNCTION
        }

        if( Struct->Type() != DRAW_SEGMENT_STRUCT_TYPE )
            continue;

        #define SEGM ( (EDA_DrawLineStruct*) Struct )
        if( SEGM->IsOneEndPointAt( pos ) )
            count++;
        #undef SEGM
    }

    return count;
}


/************************************************************************************/
static bool MarkConnected( WinEDA_SchematicFrame* frame, SCH_ITEM* ListStruct,
                           EDA_DrawLineStruct* segment )
/************************************************************************************/

/* Mark to "CANDIDATE" all wires or junction connected to "segment" in list "ListStruct"
  * Search wire stop at an any  pin
 *
  * Used by WinEDA_SchematicFrame::DeleteConnection()
 */
{
    EDA_BaseStruct* Struct;

    for( Struct = ListStruct; Struct != NULL; Struct = Struct->Next() )
    {
        if( Struct->m_Flags )
            continue;
        if( Struct->Type() == DRAW_JUNCTION_STRUCT_TYPE )
        {
        #define JUNCTION ( (DrawJunctionStruct*) Struct )
            if( segment->IsOneEndPointAt( JUNCTION->m_Pos ) )
                Struct->m_Flags |= CANDIDATE;
            continue;
        #undef JUNCTION
        }

        if( Struct->Type() != DRAW_SEGMENT_STRUCT_TYPE )
            continue;

        #define SEGM ( (EDA_DrawLineStruct*) Struct )
        if( segment->IsOneEndPointAt( SEGM->m_Start ) )
        {
            if( !frame->LocatePinEnd( ListStruct, SEGM->m_Start ) )
            {
                Struct->m_Flags |= CANDIDATE;
                MarkConnected( frame, ListStruct, SEGM );
            }
        }
        if( segment->IsOneEndPointAt( SEGM->m_End ) )
        {
            if( !frame->LocatePinEnd( ListStruct, SEGM->m_End ) )
            {
                Struct->m_Flags |= CANDIDATE;
                MarkConnected( frame, ListStruct, SEGM );
            }
        }
        #undef SEGM
    }

    return TRUE;
}


/********************************************************************************/
void WinEDA_SchematicFrame::DeleteConnection( wxDC* DC, bool DeleteFullConnection )
/********************************************************************************/

/* Delete a connection, i.e wires or bus connected
  * stop on a node (more than 2 wires (bus) connected)
 */
{
    wxPoint refpos = GetScreen()->m_Curseur;
    SCH_ITEM* DelStruct;
    DrawPickedStruct* PickedItem, * PickedList = NULL;

    /* Clear .m_Flags member for all items */
    for( DelStruct = GetScreen()->EEDrawList; DelStruct != NULL; DelStruct = DelStruct->Next() )
        DelStruct->m_Flags = 0;

    BreakSegmentOnJunction( (SCH_SCREEN*) GetScreen() );
    DelStruct = GetScreen()->EEDrawList;

    /* Locate all the wires, bus or junction under the mouse cursor, and put them in a list
      * of items to delete
     */
    SCH_SCREEN* screen = (SCH_SCREEN*) GetScreen();
    SCH_ITEM* savedEEDrawList = screen->EEDrawList;
    while( DelStruct
           && ( DelStruct = PickStruct( screen->m_Curseur,
                   screen, JUNCTIONITEM | WIREITEM | BUSITEM ) ) != NULL )
    {
        DelStruct->m_Flags = SELECTEDNODE | STRUCT_DELETED;

        /* Put this structure in the picked list: */
        PickedItem = new DrawPickedStruct( DelStruct );

        PickedItem->Pnext = PickedList;
        PickedList = PickedItem;
        DelStruct  = DelStruct->Next();
        screen->EEDrawList = DelStruct;
    }

    GetScreen()->EEDrawList = savedEEDrawList;

    /* Mark all wires, junctions, .. connected to one of the item to delete
     */
    if( DeleteFullConnection )
    {
        for( DelStruct = GetScreen()->EEDrawList; DelStruct != NULL; DelStruct = DelStruct->Next() )
        {
            if( !(DelStruct->m_Flags & SELECTEDNODE) )
                continue;

            #define SEGM ( (EDA_DrawLineStruct*) DelStruct )
            if( DelStruct->Type() != DRAW_SEGMENT_STRUCT_TYPE )
                continue;

            MarkConnected( this, GetScreen()->EEDrawList, SEGM );
            #undef SEGM
        }

        // Search all removable wires (i.e wire with one new dangling end )
        for( DelStruct = GetScreen()->EEDrawList; DelStruct != NULL; DelStruct = DelStruct->Next() )
        {
            bool noconnect = FALSE;

            if( DelStruct->m_Flags & STRUCT_DELETED )
                continue;                                               // Already seen

            if( !(DelStruct->m_Flags & CANDIDATE) )
                continue;                                               // Already seen

            if( DelStruct->Type() != DRAW_SEGMENT_STRUCT_TYPE )
                continue;

            DelStruct->m_Flags |= SKIP_STRUCT;
            #define SEGM ( (EDA_DrawLineStruct*) DelStruct )

            /* Test the SEGM->m_Start point: if this point was connected to an STRUCT_DELETED wire,
              * and now is not connected, the wire can be deleted */
            EDA_BaseStruct* removed_struct;
            for( removed_struct = GetScreen()->EEDrawList;
                 removed_struct != NULL;
                 removed_struct = removed_struct->Pnext )
            {
                if( (removed_struct->m_Flags & STRUCT_DELETED) == 0 )
                    continue;

                if( removed_struct->Type() != DRAW_SEGMENT_STRUCT_TYPE )
                    continue;

                #define WIRE ( (EDA_DrawLineStruct*) removed_struct )
                if( WIRE->IsOneEndPointAt( SEGM->m_Start ) )
                    break;
            }

            if( WIRE && !CountConnectedItems( this, GetScreen()->EEDrawList, SEGM->m_Start, TRUE ) )
                noconnect = TRUE;

            /* Test the SEGM->m_End point: if this point was connected to an STRUCT_DELETED wire,
              * and now is not connected, the wire can be deleted */
            for( removed_struct = GetScreen()->EEDrawList;
                 removed_struct != NULL;
                 removed_struct = removed_struct->Pnext )
            {
                if( (removed_struct->m_Flags & STRUCT_DELETED) == 0 )
                    continue;
                if( removed_struct->Type() != DRAW_SEGMENT_STRUCT_TYPE )
                    continue;
                if( WIRE->IsOneEndPointAt( SEGM->m_End ) )
                    break;
            }

            if( removed_struct &&
               !CountConnectedItems( this, GetScreen()->EEDrawList, SEGM->m_End, TRUE ) )
                noconnect = TRUE;

            DelStruct->m_Flags &= ~SKIP_STRUCT;

            if( noconnect )
            {
                DelStruct->m_Flags |= STRUCT_DELETED;
                /* Put this structure in the picked list: */
                PickedItem = new DrawPickedStruct( DelStruct );

                PickedItem->Pnext = PickedList;
                PickedList = PickedItem;
                DelStruct  = GetScreen()->EEDrawList;
            }
            #undef SEGM
        }

        // Delete redundant junctions (junctions which connect < 3 end wires and no pin are removed)
        for( DelStruct = GetScreen()->EEDrawList; DelStruct != NULL; DelStruct = DelStruct->Next() )
        {
            int count;
            if( DelStruct->m_Flags & STRUCT_DELETED )
                continue;

            if( !(DelStruct->m_Flags & CANDIDATE) )
                continue;

            if( DelStruct->Type() == DRAW_JUNCTION_STRUCT_TYPE )
            {
                #define JUNCTION ( (DrawJunctionStruct*) DelStruct )
                count = CountConnectedItems( this, GetScreen()->EEDrawList, JUNCTION->m_Pos, FALSE );
                if( count <= 2 )
                {
                    DelStruct->m_Flags |= STRUCT_DELETED;

                    /* Put this structure in the picked list: */
                    PickedItem = new DrawPickedStruct( DelStruct );

                    PickedItem->Pnext = PickedList;
                    PickedList = PickedItem;
                }
                #undef JUNCTION
            }
        }

        // Delete labels attached to wires
        wxPoint pos = GetScreen()->m_Curseur;
        for( DelStruct = GetScreen()->EEDrawList; DelStruct != NULL; DelStruct = DelStruct->Next() )
        {
            if( DelStruct->m_Flags & STRUCT_DELETED )
                continue;

            if( DelStruct->Type() != TYPE_SCH_LABEL )
                continue;

            GetScreen()->m_Curseur = ( (SCH_TEXT*) DelStruct )->m_Pos;
            EDA_BaseStruct* TstStruct =
                PickStruct( GetScreen()->m_Curseur, GetScreen(), WIREITEM | BUSITEM );

            if( TstStruct && TstStruct->m_Flags & STRUCT_DELETED )
            {
                DelStruct->m_Flags |= STRUCT_DELETED;

                /* Put this structure in the picked list: */
                PickedItem = new DrawPickedStruct( DelStruct );

                PickedItem->Pnext = PickedList;
                PickedList = PickedItem;
            }
        }

        GetScreen()->m_Curseur = pos;
    }

    for( DelStruct = GetScreen()->EEDrawList; DelStruct != NULL; DelStruct = DelStruct->Next() )
        DelStruct->m_Flags = 0;

    if( PickedList )
    {
        DeleteStruct( DrawPanel, DC, PickedList );
        GetScreen()->SetModify();
    }
}


/*****************************************************************/
bool LocateAndDeleteItem( WinEDA_SchematicFrame* frame, wxDC* DC )
/*****************************************************************/

/* Locate and delete the item found under the mouse cousor
  * If more than one item found: the priority order is:
  * 1 : MARKER
  * 2 : JUNCTION
  * 2 : NOCONNECT
  * 3 : WIRE ou BUS
  * 4 : DRAWITEM
  * 5 : TEXT
  * 6 : COMPOSANT
  * 7 : SHEET
 *
  * return TRUE if an item was deleted
 */
{
    SCH_ITEM* DelStruct;
    SCH_SCREEN* screen = (SCH_SCREEN*) ( frame->GetScreen() );
    bool item_deleted  = FALSE;

    DelStruct = PickStruct( screen->m_Curseur, screen, MARKERITEM );
    if( DelStruct == NULL )
        DelStruct = PickStruct( screen->m_Curseur, screen, JUNCTIONITEM );
    if( DelStruct == NULL )
        DelStruct = PickStruct( screen->m_Curseur, screen, NOCONNECTITEM );
    if( DelStruct == NULL )
        DelStruct = PickStruct( screen->m_Curseur, screen, RACCORDITEM );
    if( DelStruct == NULL )
        DelStruct = PickStruct( screen->m_Curseur, screen, WIREITEM | BUSITEM );
    if( DelStruct == NULL )
        DelStruct = PickStruct( screen->m_Curseur, screen, DRAWITEM );
    if( DelStruct == NULL )
        DelStruct = PickStruct( screen->m_Curseur, screen, TEXTITEM | LABELITEM );
    if( DelStruct == NULL )
        DelStruct = PickStruct( screen->m_Curseur, screen, LIBITEM );
    if( DelStruct == NULL )
        DelStruct = PickStruct( screen->m_Curseur, screen, SHEETITEM );

    if( DelStruct )
    {
        g_ItemToRepeat = NULL;
        DeleteStruct( frame->DrawPanel, DC, DelStruct );
        frame->TestDanglingEnds( frame->GetScreen()->EEDrawList, DC );
        frame->GetScreen()->SetModify();
        item_deleted = TRUE;
    }

    return item_deleted;
}


/***************************************************************/
void EraseStruct( SCH_ITEM* DrawStruct, SCH_SCREEN* Screen )
/***************************************************************/

/* Suppression definitive d'une structure dans une liste chainee
  * d'elements de dessin
  * DrawStruct = pointeur sur la structure
  * Screen = pointeur sur l'ecran d'appartenance
  * Le chainage de la liste est modifie.
 *
  * Remarque:
  * pour les structures DRAW_SHEET_STRUCT_TYPE, l'ecran et les structures
  *     correspondantes ne sont pas touches.
  * Ils doivent etre traites separement
 */
{
    EDA_BaseStruct* DrawList;
    DrawPickedStruct* PickedList = NULL;
    Hierarchical_PIN_Sheet_Struct* SheetLabel, * NextLabel;

    if( DrawStruct == NULL )
        return;

    if( Screen == NULL )
        return;

    Screen->SetModify();

    if( DrawStruct->Type() == DRAW_HIERARCHICAL_PIN_SHEET_STRUCT_TYPE )
    {
        /* Cette stucture est rattachee a une feuille, et n'est pas
          * accessible par la liste globale directement */
        //this structure has a sheet attached, which we must find.
        DrawList = Screen->EEDrawList;
        for( ; DrawList != NULL; DrawList = DrawList->Pnext )
        {
            if( DrawList->Type() != DRAW_SHEET_STRUCT_TYPE )
                continue;

            /* Examen de la Sheet */
            SheetLabel = ( (DrawSheetStruct*) DrawList )->m_Label;
            if( SheetLabel == NULL )
                continue;

            if( SheetLabel == (Hierarchical_PIN_Sheet_Struct*) DrawStruct )
            {
                ( (DrawSheetStruct*) DrawList )->m_Label =
                    (Hierarchical_PIN_Sheet_Struct*) SheetLabel->Pnext;

                SAFE_DELETE( DrawStruct );
                return;
            }
            else
            {
                while( SheetLabel->Pnext ) /* Examen de la liste dependante */
                {
                    NextLabel = (Hierarchical_PIN_Sheet_Struct*) SheetLabel->Pnext;
                    if( NextLabel == (Hierarchical_PIN_Sheet_Struct*) DrawStruct )
                    {
                        SheetLabel->Pnext = (EDA_BaseStruct*) NextLabel->Pnext;
                        SAFE_DELETE( DrawStruct );
                        return;
                    }
                    SheetLabel = NextLabel;
                }
            }
        }

        return;
    }

    if( DrawStruct->Type() == DRAW_PICK_ITEM_STRUCT_TYPE )
    {
        PickedList = (DrawPickedStruct*) DrawStruct;
        while( PickedList )
        {
            if( PickedList->m_PickedStruct == Screen->EEDrawList )
            {
                Screen->EEDrawList = Screen->EEDrawList->Next();
                SAFE_DELETE( DrawStruct );
            }
            else
            {
                DrawList = Screen->EEDrawList;
                while( DrawList && DrawList->Pnext )
                {
                    if( DrawList->Pnext == PickedList->m_PickedStruct )
                    {
                        DrawList->Pnext = DrawList->Pnext->Pnext;
                        SAFE_DELETE( DrawStruct );
                        return;
                    }
                    DrawList = DrawList->Pnext;
                }
            }
            PickedList = (DrawPickedStruct*) PickedList->Pnext;
        }
    }
    else    // structure usuelle */
    {
        if( DrawStruct == Screen->EEDrawList )
        {
            Screen->EEDrawList = DrawStruct->Next();
            SAFE_DELETE( DrawStruct );
        }
        else
        {
            DrawList = Screen->EEDrawList;
            while( DrawList && DrawList->Pnext )
            {
                if( DrawList->Pnext == DrawStruct )
                {
                    DrawList->Pnext = DrawStruct->Pnext;
                    SAFE_DELETE( DrawStruct );
                    return;
                }
                DrawList = DrawList->Pnext;
            }
        }
    }
}


/********************************/
void DeleteAllMarkers( int type )
/********************************/
/* Effacement des marqueurs du type "type" */
{
    SCH_SCREEN* screen;
    SCH_ITEM * DrawStruct, * NextStruct;
    DrawMarkerStruct* Marker;

    EDA_ScreenList ScreenList;

    for( screen = ScreenList.GetFirst(); screen != NULL; screen = ScreenList.GetNext() )
    {
        for( DrawStruct = screen->EEDrawList; DrawStruct != NULL; DrawStruct = NextStruct )
        {
            NextStruct = DrawStruct->Next();
            if( DrawStruct->Type() != DRAW_MARKER_STRUCT_TYPE )
                continue;

            /* Marqueur trouve */
            Marker = (DrawMarkerStruct*) DrawStruct;
            if( Marker->m_Type != type )
                continue;

            /* Suppression du marqueur */
            EraseStruct( DrawStruct, screen );
        }
    }
}


/********************************************************************/
void DeleteOneLibraryDrawStruct( WinEDA_DrawPanel* panel, wxDC* DC,
                                 EDA_LibComponentStruct* LibEntry,
                                 LibEDA_BaseStruct* DrawItem, int Affiche )
/********************************************************************/

/* Routine d'effacement d'un "LibraryDrawStruct"
  * (d'un element de dessin d'un composant )
 *
  * Parametres d'entree
  *     Pointeur sur le composant comportant la structure
  *         (Si NULL la structure a effacer est supposee non rattachee
  *         a un composant)
  *     Pointeur sur la structure a effacer
 *
  * Efface egalement le graphique correspondant de l'ecran
 */
{
    LibEDA_BaseStruct* PreviousDrawItem;

    /* Effacement du graphique  */
    if( Affiche && DC )
        DrawLibraryDrawStruct( panel, DC, LibEntry, wxPoint(0, 0), DrawItem, g_XorMode );

    /* Effacement de la structure en memoire */
    if( LibEntry ) /* Recherche du predecesseur */
    {
        PreviousDrawItem = LibEntry->m_Drawings;

        /* Cas du 1er symbole graphique = struct a supprimer */
        if( LibEntry->m_Drawings == DrawItem )
        {
            LibEntry->m_Drawings = DrawItem->Next();
            SAFE_DELETE( DrawItem );
        }
        else  /* Cas des autres items */
        {
            while( PreviousDrawItem )
            {
                if( PreviousDrawItem->Pnext == DrawItem )
                {
                    PreviousDrawItem->Pnext = DrawItem->Pnext;
                    SAFE_DELETE( DrawItem );
                    break;
                }
                PreviousDrawItem = PreviousDrawItem->Next();
            }
        }
    }

    else /* Structure non reliee a un composant */
    {
        SAFE_DELETE( DrawItem );
    }
}