kicad/pcbnew/tr_modif.cpp

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/*
* This program source code file is part of KiCad, a free EDA CAD application.
*
* Copyright (C) 2012 Jean-Pierre Charras, jean-pierre.charras@ujf-grenoble.fr
* Copyright (C) 2012 SoftPLC Corporation, Dick Hollenbeck <dick@softplc.com>
* Copyright (C) 2012 Wayne Stambaugh <stambaughw@verizon.net>
* Copyright (C) 1992-2012 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
*/
/**
* @file tr_modif.cpp
* @brief Trace editing: detects an removes a track which is become redunding,
* after a new track is craeted.
*/
#include <fctsys.h>
#include <gr_basic.h>
#include <wxPcbStruct.h>
#include <class_board.h>
#include <class_track.h>
#include <pcbnew.h>
#include <protos.h>
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static void ListSetState( EDA_ITEM* Start, int NbItem, int State, int onoff );
void DrawTraces( EDA_DRAW_PANEL* panel, wxDC* DC, TRACK* aTrackList, int nbsegment,
GR_DRAWMODE draw_mode )
{
// preserve the start of the list for debugging.
for( TRACK* track = aTrackList; nbsegment > 0 && track; nbsegment--, track = track->Next() )
{
track->Draw( panel, DC, draw_mode );
}
}
/*
* This function try to remove an old track, when a new track is created,
* and the old track is no more needed
*/
int PCB_EDIT_FRAME::EraseRedundantTrack( wxDC* aDC,
TRACK* aNewTrack,
int aNewTrackSegmentsCount,
PICKED_ITEMS_LIST* aItemsListPicker )
{
TRACK* StartTrack, * EndTrack;
TRACK* pt_segm;
TRACK* pt_del;
int ii, jj, nb_segm, nbconnect;
wxPoint start;
wxPoint end;
int startmasklayer, endmasklayer;
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int netcode = aNewTrack->GetNet();
/* Reconstruct the complete track (the new track has to start on a segment of track).
*/
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ListSetState( aNewTrack, aNewTrackSegmentsCount, BUSY, OFF );
/* If the new track begins with a via, complete the track segment using
* the following segment as a reference because a via is often a hub of
* segments, and does not characterize track.
*/
if( aNewTrack->Type() == PCB_VIA_T && ( aNewTrackSegmentsCount > 1 ) )
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aNewTrack = aNewTrack->Next();
aNewTrack = GetBoard()->MarkTrace( aNewTrack, &aNewTrackSegmentsCount, NULL, NULL, true );
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wxASSERT( aNewTrack );
#if 0 && defined(DEBUG)
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TRACK* EndNewTrack; // The last segment of the list chained to the track
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EndNewTrack = aNewTrack;
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for( ii = 1; ii < aNewTrackSegmentsCount; ii++ )
{
wxASSERT( EndNewTrack->GetState( -1 ) != 0 );
D( printf( "track %p is newly part of net %d\n", EndNewTrack, netcode ); )
EndNewTrack = EndNewTrack->Next();
}
wxASSERT( EndNewTrack->GetState( -1 ) != 0 );
D( printf( "track %p is newly part of net %d\n", EndNewTrack, netcode ); )
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for( TRACK* track = m_Pcb->m_Track; track; track = track->Next() )
track->Show( 0, std::cout );
#endif
TRACK* bufStart = m_Pcb->m_Track->GetStartNetCode( netcode ); // Beginning of tracks of the net
TRACK* bufEnd = bufStart->GetEndNetCode( netcode ); // End of tracks of the net
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// Flags for cleaning the net.
for( pt_del = bufStart; pt_del; pt_del = pt_del->Next() )
{
// D( std::cout<<"track "<<pt_del<<" turning off BUSY | IN_EDIT | IS_LINKED"<<std::endl; )
pt_del->SetState( BUSY | IN_EDIT | IS_LINKED, OFF );
if( pt_del == bufEnd ) // Last segment reached
break;
}
if( aNewTrack->GetEndSegments( aNewTrackSegmentsCount, &StartTrack, &EndTrack ) == 0 )
return 0;
if( ( StartTrack == NULL ) || ( EndTrack == NULL ) )
return 0;
start = StartTrack->GetStart();
end = EndTrack->GetEnd();
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// The start and end points cannot be the same.
if( start == end )
return 0;
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// Determine layers interconnected these points.
startmasklayer = StartTrack->ReturnMaskLayer();
endmasklayer = EndTrack->ReturnMaskLayer();
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// There may be a via or a pad on the end points.
pt_segm = m_Pcb->m_Track->GetVia( NULL, start, startmasklayer );
if( pt_segm )
startmasklayer |= pt_segm->ReturnMaskLayer();
if( StartTrack->start && ( StartTrack->start->Type() == PCB_PAD_T ) )
{
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// Start on pad.
D_PAD* pad = (D_PAD*) StartTrack->start;
startmasklayer |= pad->GetLayerMask();
}
pt_segm = m_Pcb->m_Track->GetVia( NULL, end, endmasklayer );
if( pt_segm )
endmasklayer |= pt_segm->ReturnMaskLayer();
if( EndTrack->end && ( EndTrack->end->Type() == PCB_PAD_T ) )
{
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D_PAD* pad = (D_PAD*) EndTrack->end;
endmasklayer |= pad->GetLayerMask();
}
// Mark as deleted a new track (which is not involved in the search for other connections)
ListSetState( aNewTrack, aNewTrackSegmentsCount, IS_DELETED, ON );
/* A segment must be connected to the starting point, otherwise
* it is unnecessary to analyze the other point
*/
pt_segm = GetTrace( bufStart, bufEnd, start, startmasklayer );
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if( pt_segm == NULL ) // Not connected to the track starting point.
{
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// Clear the delete flag.
ListSetState( aNewTrack, aNewTrackSegmentsCount, IS_DELETED, OFF );
return 0;
}
/* Marking a list of candidate segmented connect to endpoint
* Note: the vias are not taken into account because they do
* not define a track, since they are on an intersection.
*/
for( pt_del = bufStart, nbconnect = 0; ; )
{
pt_segm = GetTrace( pt_del, bufEnd, end, endmasklayer );
if( pt_segm == NULL )
break;
if( pt_segm->Type() != PCB_VIA_T )
{
if( pt_segm->GetState( IS_LINKED ) == 0 )
{
pt_segm->SetState( IS_LINKED, ON );
nbconnect++;
}
}
if( pt_del == bufEnd )
break;
pt_del = pt_segm->Next();
}
if( nbconnect == 0 )
{
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// Clear used flags
for( pt_del = bufStart; pt_del; pt_del = pt_del->Next() )
{
pt_del->SetState( BUSY | IS_DELETED | IN_EDIT | IS_LINKED, OFF );
if( pt_del == bufEnd ) // Last segment reached
break;
}
return 0;
}
// Mark trace as edited (which does not involve searching for other tracks)
ListSetState( aNewTrack, aNewTrackSegmentsCount, IS_DELETED, OFF );
ListSetState( aNewTrack, aNewTrackSegmentsCount, IN_EDIT, ON );
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// Test all marked segments.
while( nbconnect )
{
for( pt_del = bufStart; pt_del; pt_del = pt_del->Next() )
{
if( pt_del->GetState( IS_LINKED ) )
break;
if( pt_del == bufEnd ) // Last segment reached
break;
}
nbconnect--;
pt_del->SetState( IS_LINKED, OFF );
pt_del = GetBoard()->MarkTrace( pt_del, &nb_segm, NULL, NULL, true );
/* Test if the marked track is redundant, i.e. if one of marked segments
* is connected to the starting point of the new track.
*/
ii = 0;
pt_segm = pt_del;
for( ; pt_segm && (ii < nb_segm); pt_segm = pt_segm->Next(), ii++ )
{
if( pt_segm->GetState( BUSY ) == 0 )
break;
if( pt_segm->GetStart() == start || pt_segm->GetEnd() == start )
{
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// Marked track can be erased.
TRACK* NextS;
DrawTraces( m_canvas, aDC, pt_del, nb_segm, GR_XOR | GR_HIGHLIGHT );
for( jj = 0; jj < nb_segm; jj++, pt_del = NextS )
{
NextS = pt_del->Next();
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if( aItemsListPicker )
{
pt_del->UnLink();
pt_del->SetStatus( 0 );
pt_del->ClearFlags();
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ITEM_PICKER picker( pt_del, UR_DELETED );
aItemsListPicker->PushItem( picker );
}
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else
{
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pt_del->DeleteStructure();
}
}
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// Clean up flags.
for( pt_del = m_Pcb->m_Track; pt_del != NULL; pt_del = pt_del->Next() )
{
if( pt_del->GetState( IN_EDIT ) )
{
pt_del->SetState( IN_EDIT, OFF );
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if( aDC )
pt_del->Draw( m_canvas, aDC, GR_OR );
}
pt_del->SetState( IN_EDIT | IS_LINKED, OFF );
}
return 1;
}
}
// Clear BUSY flag here because the track did not get marked.
ListSetState( pt_del, nb_segm, BUSY, OFF );
}
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// Clear used flags
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for( pt_del = m_Pcb->m_Track; pt_del; pt_del = pt_del->Next() )
{
pt_del->SetState( BUSY | IS_DELETED | IN_EDIT | IS_LINKED, OFF );
if( pt_del == bufEnd ) // Last segment reached
break;
}
return 0;
}
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/* Set the bits of .m_State member to on/off value, using bit mask State
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* of a list of EDA_ITEM
*/
static void ListSetState( EDA_ITEM* Start, int NbItem, int State, int onoff )
{
for( ; (Start != NULL ) && ( NbItem > 0 ); NbItem--, Start = Start->Next() )
{
Start->SetState( State, onoff );
}
}