kicad/pcbnew/board_connected_item.cpp

/*
 * This program source code file is part of KiCad, a free EDA CAD application.
 *
 * Copyright (C) 2015 Jean-Pierre Charras, jp.charras at wanadoo.fr
 * Copyright (C) 2012 SoftPLC Corporation, Dick Hollenbeck <dick@softplc.com>
 * Copyright (C) 1992-2020 KiCad Developers, see AUTHORS.txt for contributors.
 *
 * This program is free software; you can redistribute it and/or
 * modify it under the terms of the GNU General Public License
 * as published by the Free Software Foundation; either version 2
 * of the License, or (at your option) any later version.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program; if not, you may find one here:
 * http://www.gnu.org/licenses/old-licenses/gpl-2.0.html
 * or you may search the http://www.gnu.org website for the version 2 license,
 * or you may write to the Free Software Foundation, Inc.,
 * 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301, USA
 */

#include <fctsys.h>
#include <pcbnew.h>

#include <class_board.h>
#include <class_board_item.h>

#include <connectivity/connectivity_data.h>


BOARD_CONNECTED_ITEM::BOARD_CONNECTED_ITEM( BOARD_ITEM* aParent, KICAD_T idtype ) :
    BOARD_ITEM( aParent, idtype ), m_netinfo( NETINFO_LIST::OrphanedItem() )
{
    m_localRatsnestVisible = true;
}


bool BOARD_CONNECTED_ITEM::SetNetCode( int aNetCode, bool aNoAssert )
{
    if( !IsOnCopperLayer() )
        aNetCode = 0;

    // if aNetCode < 0 ( typically NETINFO_LIST::FORCE_ORPHANED )
    // or no parent board,
    // set the m_netinfo to the dummy NETINFO_LIST::ORPHANED

    BOARD* board = GetBoard();
    //auto connectivity = board ? board->GetConnectivity() : nullptr;
    //bool addRatsnest = false;

    //if( connectivity )
        //addRatsnest = connectivity->Remove( this );

    if( ( aNetCode >= 0 ) && board )
        m_netinfo = board->FindNet( aNetCode );
    else
        m_netinfo = NETINFO_LIST::OrphanedItem();

    if( !aNoAssert )
        wxASSERT( m_netinfo );

    // Add only if it was previously added to the ratsnest
    //if( addRatsnest )
    //    connectivity->Add( this );

    return ( m_netinfo != NULL );
}


// This method returns the Default netclass for nets which don't have their own.
NETCLASS* BOARD_CONNECTED_ITEM::GetEffectiveNetclass() const
{
    // NB: we must check the net first, as when it is 0 GetNetClass() will return the
    // orphaned net netclass, not the default netclass.
    if( m_netinfo->GetNet() == 0 )
        return GetBoard()->GetDesignSettings().GetDefault();
    else
        return GetNetClass();
}


/*
 * Clearances exist in a hiearchy.  If a given level is specified then the remaining levels
 * are NOT consulted.
 *
 * LEVEL 1: (highest priority) local overrides (pad, footprint, etc.)
 * LEVEL 2: Rules
 * LEVEL 3: Accumulated local settings, netclass settings, & board design settings
 */
int BOARD_CONNECTED_ITEM::GetClearance( BOARD_ITEM* aItem, wxString* aSource ) const
{
    BOARD*                board = GetBoard();
    int                   clearance = 0;
    wxString              source;
    wxString*             localSource = aSource ? &source : nullptr;
    BOARD_CONNECTED_ITEM* second = dynamic_cast<BOARD_CONNECTED_ITEM*>( aItem );

    // No clearance if "this" is not (yet) linked to a board therefore no available netclass
    if( !board )
        return clearance;

    // LEVEL 1: local overrides (pad, footprint, etc.)
    //
    if( GetLocalClearanceOverrides() > clearance )
        clearance = GetLocalClearanceOverrides( localSource );

    if( second && second->GetLocalClearanceOverrides() > clearance )
        clearance = second->GetLocalClearanceOverrides( localSource );

    if( clearance )
    {
        if( aSource )
            *aSource = *localSource;

        return clearance;
    }

    // LEVEL 2: Rules
    //
    if( GetRuleClearance( aItem, &clearance, aSource ) )
        return clearance;

    // LEVEL 3: Accumulated local settings, netclass settings, & board design settings
    //
    BOARD_DESIGN_SETTINGS& bds = board->GetDesignSettings();
    NETCLASS*              netclass = GetEffectiveNetclass();
    NETCLASS*              secondNetclass = second ? second->GetEffectiveNetclass() : nullptr;

    if( bds.m_MinClearance > clearance )
    {
        if( aSource )
            *aSource = _( "board minimum" );

        clearance = bds.m_MinClearance;
    }

    if( netclass && netclass->GetClearance() > clearance )
        clearance = netclass->GetClearance( aSource );

    if( secondNetclass && secondNetclass->GetClearance() > clearance )
        clearance = secondNetclass->GetClearance( aSource );

    if( aItem && aItem->GetLayer() == Edge_Cuts && bds.m_CopperEdgeClearance > clearance )
    {
        if( aSource )
            *aSource = _( "board edge" );

        clearance = bds.m_CopperEdgeClearance;
    }

    if( GetLocalClearance() > clearance )
        clearance = GetLocalClearance( aSource );

    if( second && second->GetLocalClearance() > clearance )
        clearance = second->GetLocalClearance( aSource );

    return clearance;
}


bool BOARD_CONNECTED_ITEM::GetRuleClearance( BOARD_ITEM* aItem, int* aClearance,
                                             wxString* aSource ) const
{
    DRC_RULE* rule = GetRule( this, aItem, CLEARANCE_CONSTRAINT );

    if( rule )
    {
        if( aSource )
            *aSource = wxString::Format( _( "'%s' rule" ), rule->m_Name );

        *aClearance = rule->m_Clearance.Min;
        return true;
    }

    return false;
}


// Note: do NOT return a std::shared_ptr from this.  It is used heavily in DRC, and the
// std::shared_ptr stuff shows up large in performance profiling.
NETCLASS* BOARD_CONNECTED_ITEM::GetNetClass() const
{
    NETCLASS* netclass = m_netinfo->GetNetClass();

    if( netclass )
        return netclass;
    else
        return GetBoard()->GetDesignSettings().GetDefault();
}


wxString BOARD_CONNECTED_ITEM::GetNetClassName() const
{
    return m_netinfo->GetClassName();
}