schematic.cpp

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/*
 * This program source code file is part of KiCad, a free EDA CAD application.
 *
 * Copyright (C) 2020-2023 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 3 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, see <http://www.gnu.org/licenses/>.
 */
 
#include <bus_alias.h>
#include <commit.h>
#include <connection_graph.h>
#include <core/ignore.h>
#include <core/kicad_algo.h>
#include <ee_collectors.h>
#include <erc/erc_settings.h>
#include <sch_marker.h>
#include <project.h>
#include <project/project_file.h>
#include <project/net_settings.h>
#include <schematic.h>
#include <sch_junction.h>
#include <sch_line.h>
#include <sch_screen.h>
#include <sim/spice_settings.h>
#include <sch_label.h>
#include <sim/spice_value.h>
#include <netlist_exporter_spice.h>
 
SCHEMATIC::SCHEMATIC( PROJECT* aPrj ) :
 EDA_ITEM( nullptr, SCHEMATIC_T ),
 m_project( nullptr ),
 m_rootSheet( nullptr )
{
 m_currentSheet = new SCH_SHEET_PATH();
 m_connectionGraph = new CONNECTION_GRAPH( this );
 
 SetProject( aPrj );
 
 PROPERTY_MANAGER::Instance().RegisterListener( TYPE_HASH( SCH_FIELD ),
 [&]( INSPECTABLE* aItem, PROPERTY_BASE* aProperty, COMMIT* aCommit )
 {
 // Special case: propagate value, footprint, and datasheet fields to other units
 // of a given symbol if they aren't in the selection
 
 SCH_FIELD* field = dynamic_cast<SCH_FIELD*>( aItem );
 
 if( !field || !IsValid() )
 return;
 
 SCH_SYMBOL* symbol = dynamic_cast<SCH_SYMBOL*>( field->GetParent() );
 
 if( !symbol || aProperty->Name() != _HKI( "Text" ) )
 return;
 
 // TODO(JE) This will need to get smarter to enable API access
 SCH_SHEET_PATH sheetPath = CurrentSheet();
 
 wxString newValue = aItem->Get<wxString>( aProperty );
 
 wxString ref = symbol->GetRef( &sheetPath );
 int unit = symbol->GetUnit();
 LIB_ID libId = symbol->GetLibId();
 
 for( SCH_SHEET_PATH& sheet : GetSheets() )
 {
 std::vector<SCH_SYMBOL*> otherUnits;
 
 CollectOtherUnits( ref, unit, libId, sheet, &otherUnits );
 
 for( SCH_SYMBOL* otherUnit : otherUnits )
 {
 switch( field->GetId() )
 {
 case VALUE_FIELD:
 {
 if( aCommit )
 aCommit->Modify( otherUnit, sheet.LastScreen() );
 
 otherUnit->SetValueFieldText( newValue );
 break;
 }
 
 case FOOTPRINT_FIELD:
 {
 if( aCommit )
 aCommit->Modify( otherUnit, sheet.LastScreen() );
 
 otherUnit->SetFootprintFieldText( newValue );
 break;
 }
 
 case DATASHEET_FIELD:
 {
 if( aCommit )
 aCommit->Modify( otherUnit, sheet.LastScreen() );
 
 otherUnit->GetField( DATASHEET_FIELD )->SetText( newValue );
 break;
 }
 
 default:
 break;
 }
 }
 }
 } );
}
 
 
SCHEMATIC::~SCHEMATIC()
{
 PROPERTY_MANAGER::Instance().UnregisterListeners( TYPE_HASH( SCH_FIELD ) );
 
 delete m_currentSheet;
 delete m_connectionGraph;
}
 
 
void SCHEMATIC::Reset()
{
 if( m_project )
 {
 PROJECT_FILE& project = m_project->GetProjectFile();
 
 // d'tor will save settings to file
 delete project.m_ErcSettings;
 project.m_ErcSettings = nullptr;
 
 // d'tor will save settings to file
 delete project.m_SchematicSettings;
 project.m_SchematicSettings = nullptr;
 
 m_project = nullptr; // clear the project, so we don't do this again when setting a new one
 }
 
 delete m_rootSheet;
 
 m_rootSheet = nullptr;
 
 m_connectionGraph->Reset();
 m_currentSheet->clear();
}
 
 
void SCHEMATIC::SetProject( PROJECT* aPrj )
{
 if( m_project )
 {
 PROJECT_FILE& project = m_project->GetProjectFile();
 
 // d'tor will save settings to file
 delete project.m_ErcSettings;
 project.m_ErcSettings = nullptr;
 
 // d'tor will save settings to file
 delete project.m_SchematicSettings;
 project.m_SchematicSettings = nullptr;
 }
 
 m_project = aPrj;
 
 if( m_project )
 {
 PROJECT_FILE& project = m_project->GetProjectFile();
 project.m_ErcSettings = new ERC_SETTINGS( &project, "erc" );
 project.m_SchematicSettings = new SCHEMATIC_SETTINGS( &project, "schematic" );
 
 project.m_SchematicSettings->LoadFromFile();
 project.m_SchematicSettings->m_NgspiceSettings->LoadFromFile();
 project.m_ErcSettings->LoadFromFile();
 }
}
 
 
void SCHEMATIC::SetRoot( SCH_SHEET* aRootSheet )
{
 wxCHECK_RET( aRootSheet, wxS( "Call to SetRoot with null SCH_SHEET!" ) );
 
 m_rootSheet = aRootSheet;
 
 m_currentSheet->clear();
 m_currentSheet->push_back( m_rootSheet );
 
 m_connectionGraph->Reset();
}
 
 
SCH_SCREEN* SCHEMATIC::RootScreen() const
{
 return IsValid() ? m_rootSheet->GetScreen() : nullptr;
}
 
 
void SCHEMATIC::GetContextualTextVars( wxArrayString* aVars ) const
{
 auto add =
 [&]( const wxString& aVar )
 {
 if( !alg::contains( *aVars, aVar ) )
 aVars->push_back( aVar );
 };
 
 add( wxT( "#" ) );
 add( wxT( "##" ) );
 add( wxT( "SHEETPATH" ) );
 add( wxT( "SHEETNAME" ) );
 add( wxT( "FILENAME" ) );
 add( wxT( "FILEPATH" ) );
 add( wxT( "PROJECTNAME" ) );
 
 if( !CurrentSheet().empty() )
 CurrentSheet().LastScreen()->GetTitleBlock().GetContextualTextVars( aVars );
 
 for( std::pair<wxString, wxString> entry : Prj().GetTextVars() )
 add( entry.first );
}
 
 
bool SCHEMATIC::ResolveTextVar( const SCH_SHEET_PATH* aSheetPath, wxString* token,
 int aDepth ) const
{
 wxCHECK( aSheetPath, false );
 
 if( token->IsSameAs( wxT( "#" ) ) )
 {
 *token = aSheetPath->GetPageNumber();
 return true;
 }
 else if( token->IsSameAs( wxT( "##" ) ) )
 {
 *token = wxString::Format( "%i", Root().CountSheets() );
 return true;
 }
 else if( token->IsSameAs( wxT( "SHEETPATH" ) ) )
 {
 *token = aSheetPath->PathHumanReadable();
 return true;
 }
 else if( token->IsSameAs( wxT( "SHEETNAME" ) ) )
 {
 *token = aSheetPath->Last()->GetName();
 return true;
 }
 else if( token->IsSameAs( wxT( "FILENAME" ) ) )
 {
 wxFileName fn( GetFileName() );
 *token = fn.GetFullName();
 return true;
 }
 else if( token->IsSameAs( wxT( "FILEPATH" ) ) )
 {
 wxFileName fn( GetFileName() );
 *token = fn.GetFullPath();
 return true;
 }
 else if( token->IsSameAs( wxT( "PROJECTNAME" ) ) )
 {
 *token = Prj().GetProjectName();
 return true;
 }
 
 if( aSheetPath->LastScreen()->GetTitleBlock().TextVarResolver( token, m_project ) )
 return true;
 
 if( Prj().TextVarResolver( token ) )
 return true;
 
 return false;
}
 
 
wxString SCHEMATIC::GetFileName() const
{
 return IsValid() ? m_rootSheet->GetScreen()->GetFileName() : wxString( wxEmptyString );
}
 
 
SCHEMATIC_SETTINGS& SCHEMATIC::Settings() const
{
 wxASSERT( m_project );
 return *m_project->GetProjectFile().m_SchematicSettings;
}
 
 
ERC_SETTINGS& SCHEMATIC::ErcSettings() const
{
 wxASSERT( m_project );
 return *m_project->GetProjectFile().m_ErcSettings;
}
 
 
std::vector<SCH_MARKER*> SCHEMATIC::ResolveERCExclusions()
{
 SCH_SHEET_LIST sheetList = GetSheets();
 ERC_SETTINGS& settings = ErcSettings();
 
 // Migrate legacy marker exclusions to new format to ensure exclusion matching functions across
 // file versions. Silently drops any legacy exclusions which can not be mapped to the new format
 // without risking an incorrect exclusion - this is preferable to silently dropping
 // new ERC errors / warnings due to an incorrect match between a legacy and new
 // marker serialization format
 std::set<wxString> migratedExclusions;
 
 for( auto it = settings.m_ErcExclusions.begin(); it != settings.m_ErcExclusions.end(); )
 {
 SCH_MARKER* testMarker = SCH_MARKER::DeserializeFromString( this, *it );
 
 if( testMarker->IsLegacyMarker() )
 {
 const wxString settingsKey = testMarker->GetRCItem()->GetSettingsKey();
 
 if( settingsKey != wxT( "pin_to_pin" )
 && settingsKey != wxT( "hier_label_mismatch" )
 && settingsKey != wxT( "different_unit_net" ) )
 {
 migratedExclusions.insert( testMarker->SerializeToString() );
 }
 
 it = settings.m_ErcExclusions.erase( it );
 }
 else
 {
 ++it;
 }
 
 delete testMarker;
 }
 
 settings.m_ErcExclusions.insert( migratedExclusions.begin(), migratedExclusions.end() );
 
 // End of legacy exclusion removal / migrations
 
 for( const SCH_SHEET_PATH& sheet : sheetList )
 {
 for( SCH_ITEM* item : sheet.LastScreen()->Items().OfType( SCH_MARKER_T ) )
 {
 SCH_MARKER* marker = static_cast<SCH_MARKER*>( item );
 wxString serialized = marker->SerializeToString();
 std::set<wxString>::iterator it = settings.m_ErcExclusions.find( serialized );
 
 if( it != settings.m_ErcExclusions.end() )
 {
 marker->SetExcluded( true, settings.m_ErcExclusionComments[serialized] );
 settings.m_ErcExclusions.erase( it );
 }
 }
 }
 
 std::vector<SCH_MARKER*> newMarkers;
 
 for( const wxString& serialized : settings.m_ErcExclusions )
 {
 SCH_MARKER* marker = SCH_MARKER::DeserializeFromString( this, serialized );
 
 if( marker )
 {
 marker->SetExcluded( true, settings.m_ErcExclusionComments[serialized] );
 newMarkers.push_back( marker );
 }
 }
 
 settings.m_ErcExclusions.clear();
 
 return newMarkers;
}
 
 
std::shared_ptr<BUS_ALIAS> SCHEMATIC::GetBusAlias( const wxString& aLabel ) const
{
 for( const SCH_SHEET_PATH& sheet : GetSheets() )
 {
 for( const std::shared_ptr<BUS_ALIAS>& alias : sheet.LastScreen()->GetBusAliases() )
 {
 if( alias->GetName() == aLabel )
 return alias;
 }
 }
 
 return nullptr;
}
 
 
std::set<wxString> SCHEMATIC::GetNetClassAssignmentCandidates()
{
 std::set<wxString> names;
 
 for( const auto& [ key, subgraphList ] : m_connectionGraph->GetNetMap() )
 {
 CONNECTION_SUBGRAPH* firstSubgraph = subgraphList[0];
 
 if( !firstSubgraph->GetDriverConnection()->IsBus()
 && firstSubgraph->GetDriverPriority() >= CONNECTION_SUBGRAPH::PRIORITY::PIN )
 {
 names.insert( key.Name );
 }
 }
 
 return names;
}
 
 
bool SCHEMATIC::ResolveCrossReference( wxString* token, int aDepth ) const
{
 SCH_SHEET_LIST sheetList = GetSheets();
 wxString remainder;
 wxString ref = token->BeforeFirst( ':', &remainder );
 SCH_SHEET_PATH sheetPath;
 SCH_ITEM* refItem = sheetList.GetItem( KIID( ref ), &sheetPath );
 
 if( refItem && refItem->Type() == SCH_SYMBOL_T )
 {
 SCH_SYMBOL* refSymbol = static_cast<SCH_SYMBOL*>( refItem );
 
 if( refSymbol->ResolveTextVar( &sheetPath, &remainder, aDepth + 1 ) )
 *token = remainder;
 else
 *token = refSymbol->GetRef( &sheetPath, true ) + wxS( ":" ) + remainder;
 
 return true; // Cross-reference is resolved whether or not the actual textvar was
 }
 else if( refItem && refItem->Type() == SCH_SHEET_T )
 {
 SCH_SHEET* refSheet = static_cast<SCH_SHEET*>( refItem );
 
 sheetPath.push_back( refSheet );
 
 if( refSheet->ResolveTextVar( &sheetPath, &remainder, aDepth + 1 ) )
 *token = remainder;
 
 return true; // Cross-reference is resolved whether or not the actual textvar was
 }
 
 return false;
}
 
 
std::map<int, wxString> SCHEMATIC::GetVirtualPageToSheetNamesMap() const
{
 std::map<int, wxString> namesMap;
 
 for( const SCH_SHEET_PATH& sheet : GetSheets() )
 {
 if( sheet.size() == 1 )
 namesMap[sheet.GetVirtualPageNumber()] = _( "<root sheet>" );
 else
 namesMap[sheet.GetVirtualPageNumber()] = sheet.Last()->GetName();
 }
 
 return namesMap;
}
 
 
std::map<int, wxString> SCHEMATIC::GetVirtualPageToSheetPagesMap() const
{
 std::map<int, wxString> pagesMap;
 
 for( const SCH_SHEET_PATH& sheet : GetSheets() )
 pagesMap[sheet.GetVirtualPageNumber()] = sheet.GetPageNumber();
 
 return pagesMap;
}
 
 
wxString SCHEMATIC::ConvertRefsToKIIDs( const wxString& aSource ) const
{
 wxString newbuf;
 size_t sourceLen = aSource.length();
 
 for( size_t i = 0; i < sourceLen; ++i )
 {
 if( aSource[i] == '$' && i + 1 < sourceLen && aSource[i+1] == '{' )
 {
 wxString token;
 bool isCrossRef = false;
 int nesting = 0;
 
 for( i = i + 2; i < sourceLen; ++i )
 {
 if( aSource[i] == '{'
 && ( aSource[i-1] == '_' || aSource[i-1] == '^' || aSource[i-1] == '~' ) )
 {
 nesting++;
 }
 
 if( aSource[i] == '}' )
 {
 nesting--;
 
 if( nesting < 0 )
 break;
 }
 
 if( aSource[i] == ':' )
 isCrossRef = true;
 
 token.append( aSource[i] );
 }
 
 if( isCrossRef )
 {
 SCH_SHEET_LIST sheetList = GetSheets();
 wxString remainder;
 wxString ref = token.BeforeFirst( ':', &remainder );
 SCH_REFERENCE_LIST references;
 
 sheetList.GetSymbols( references );
 
 for( size_t jj = 0; jj < references.GetCount(); jj++ )
 {
 SCH_SYMBOL* refSymbol = references[ jj ].GetSymbol();
 
 if( ref == refSymbol->GetRef( &references[ jj ].GetSheetPath(), true ) )
 {
 token = refSymbol->m_Uuid.AsString() + wxS( ":" ) + remainder;
 break;
 }
 }
 }
 
 newbuf.append( wxS( "${" ) + token + wxS( "}" ) );
 }
 else
 {
 newbuf.append( aSource[i] );
 }
 }
 
 return newbuf;
}
 
 
wxString SCHEMATIC::ConvertKIIDsToRefs( const wxString& aSource ) const
{
 wxString newbuf;
 size_t sourceLen = aSource.length();
 
 for( size_t i = 0; i < sourceLen; ++i )
 {
 if( aSource[i] == '$' && i + 1 < sourceLen && aSource[i+1] == '{' )
 {
 wxString token;
 bool isCrossRef = false;
 
 for( i = i + 2; i < sourceLen; ++i )
 {
 if( aSource[i] == '}' )
 break;
 
 if( aSource[i] == ':' )
 isCrossRef = true;
 
 token.append( aSource[i] );
 }
 
 if( isCrossRef )
 {
 SCH_SHEET_LIST sheetList = GetSheets();
 wxString remainder;
 wxString ref = token.BeforeFirst( ':', &remainder );
 
 SCH_SHEET_PATH refSheetPath;
 SCH_ITEM* refItem = sheetList.GetItem( KIID( ref ), &refSheetPath );
 
 if( refItem && refItem->Type() == SCH_SYMBOL_T )
 {
 SCH_SYMBOL* refSymbol = static_cast<SCH_SYMBOL*>( refItem );
 token = refSymbol->GetRef( &refSheetPath, true ) + wxS( ":" ) + remainder;
 }
 }
 
 newbuf.append( wxS( "${" ) + token + wxS( "}" ) );
 }
 else
 {
 newbuf.append( aSource[i] );
 }
 }
 
 return newbuf;
}
 
 
SCH_SHEET_LIST& SCHEMATIC::GetFullHierarchy() const
{
 static SCH_SHEET_LIST hierarchy;
 
 hierarchy.clear();
 hierarchy.BuildSheetList( m_rootSheet, false );
 
 return hierarchy;
}
 
 
void SCHEMATIC::SetLegacySymbolInstanceData()
{
 SCH_SCREENS screens( m_rootSheet );
 
 screens.SetLegacySymbolInstanceData();
}
 
 
wxString SCHEMATIC::GetUniqueFilenameForCurrentSheet()
{
 // Filename is rootSheetName-sheetName-...-sheetName
 // Note that we need to fetch the rootSheetName out of its filename, as the root SCH_SHEET's
 // name is just a timestamp.
 
 wxFileName rootFn( CurrentSheet().at( 0 )->GetFileName() );
 wxString filename = rootFn.GetName();
 
 for( unsigned i = 1; i < CurrentSheet().size(); i++ )
 filename += wxT( "-" ) + CurrentSheet().at( i )->GetName();
 
 return filename;
}
 
 
void SCHEMATIC::SetSheetNumberAndCount()
{
 SCH_SCREEN* screen;
 SCH_SCREENS s_list( Root() );
 
 // Set the sheet count, and the sheet number (1 for root sheet)
 int sheet_count = Root().CountSheets();
 int sheet_number = 1;
 const KIID_PATH& current_sheetpath = CurrentSheet().Path();
 
 // @todo Remove all pseudo page number system is left over from prior to real page number
 // implementation.
 for( const SCH_SHEET_PATH& sheet : GetSheets() )
 {
 if( sheet.Path() == current_sheetpath ) // Current sheet path found
 break;
 
 sheet_number++; // Not found, increment before this current path
 }
 
 for( screen = s_list.GetFirst(); screen != nullptr; screen = s_list.GetNext() )
 screen->SetPageCount( sheet_count );
 
 CurrentSheet().SetVirtualPageNumber( sheet_number );
 CurrentSheet().LastScreen()->SetVirtualPageNumber( sheet_number );
 CurrentSheet().LastScreen()->SetPageNumber( CurrentSheet().GetPageNumber() );
}
 
 
void SCHEMATIC::RecomputeIntersheetRefs( const std::function<void( SCH_GLOBALLABEL* )>& aItemCallback )
{
 std::map<wxString, std::set<int>>& pageRefsMap = GetPageRefsMap();
 
 pageRefsMap.clear();
 
 for( const SCH_SHEET_PATH& sheet : GetSheets() )
 {
 for( SCH_ITEM* item : sheet.LastScreen()->Items().OfType( SCH_GLOBAL_LABEL_T ) )
 {
 SCH_GLOBALLABEL* global = static_cast<SCH_GLOBALLABEL*>( item );
 wxString resolvedLabel = global->GetShownText( &sheet, false );
 
 pageRefsMap[ resolvedLabel ].insert( sheet.GetVirtualPageNumber() );
 }
 }
 
 bool show = Settings().m_IntersheetRefsShow;
 
 // Refresh all visible global labels. Note that we have to collect them first as the
 // SCH_SCREEN::Update() call is going to invalidate the RTree iterator.
 
 std::vector<SCH_GLOBALLABEL*> currentSheetGlobalLabels;
 
 for( EDA_ITEM* item : CurrentSheet().LastScreen()->Items().OfType( SCH_GLOBAL_LABEL_T ) )
 currentSheetGlobalLabels.push_back( static_cast<SCH_GLOBALLABEL*>( item ) );
 
 for( SCH_GLOBALLABEL* globalLabel : currentSheetGlobalLabels )
 {
 std::vector<SCH_FIELD>& fields = globalLabel->GetFields();
 
 fields[0].SetVisible( show );
 
 if( show )
 {
 if( fields.size() == 1 && fields[0].GetTextPos() == globalLabel->GetPosition() )
 globalLabel->AutoplaceFields( CurrentSheet().LastScreen(), false );
 
 CurrentSheet().LastScreen()->Update( globalLabel );
 aItemCallback( globalLabel );
 }
 }
}
 
 
wxString SCHEMATIC::GetOperatingPoint( const wxString& aNetName, int aPrecision,
 const wxString& aRange )
{
 std::string spiceNetName( aNetName.Lower().ToStdString() );
 NETLIST_EXPORTER_SPICE::ConvertToSpiceMarkup( spiceNetName );
 
 if( spiceNetName == "gnd" || spiceNetName == "0" )
 return wxEmptyString;
 
 auto it = m_operatingPoints.find( spiceNetName );
 
 if( it != m_operatingPoints.end() )
 return SPICE_VALUE( it->second ).ToString( { aPrecision, aRange } );
 else if( m_operatingPoints.empty() )
 return wxS( "--" );
 else
 return wxS( "?" );
}
 
 
void SCHEMATIC::FixupJunctions()
{
 for( const SCH_SHEET_PATH& sheet : GetSheets() )
 {
 SCH_SCREEN* screen = sheet.LastScreen();
 
 std::deque<EDA_ITEM*> allItems;
 
 for( auto item : screen->Items() )
 allItems.push_back( item );
 
 // Add missing junctions and breakup wires as needed
 for( const VECTOR2I& point : screen->GetNeededJunctions( allItems ) )
 {
 SCH_JUNCTION* junction = new SCH_JUNCTION( point );
 screen->Append( junction );
 
 // Breakup wires
 for( SCH_LINE* wire : screen->GetBusesAndWires( point, true ) )
 {
 SCH_LINE* newSegment = wire->BreakAt( point );
 screen->Append( newSegment );
 }
 }
 }
}
 
 
void SCHEMATIC::OnItemsAdded( std::vector<SCH_ITEM*>& aNewItems )
{
 InvokeListeners( &SCHEMATIC_LISTENER::OnSchItemsAdded, *this, aNewItems );
}
 
 
void SCHEMATIC::OnItemsRemoved( std::vector<SCH_ITEM*>& aRemovedItems )
{
 InvokeListeners( &SCHEMATIC_LISTENER::OnSchItemsRemoved, *this, aRemovedItems );
}
 
 
void SCHEMATIC::OnItemsChanged( std::vector<SCH_ITEM*>& aItems )
{
 InvokeListeners( &SCHEMATIC_LISTENER::OnSchItemsChanged, *this, aItems );
}
 
 
void SCHEMATIC::OnSchSheetChanged()
{
 InvokeListeners( &SCHEMATIC_LISTENER::OnSchSheetChanged, *this );
}
 
 
void SCHEMATIC::AddListener( SCHEMATIC_LISTENER* aListener )
{
 if( !alg::contains( m_listeners, aListener ) )
 m_listeners.push_back( aListener );
}
 
 
void SCHEMATIC::RemoveListener( SCHEMATIC_LISTENER* aListener )
{
 auto i = std::find( m_listeners.begin(), m_listeners.end(), aListener );
 
 if( i != m_listeners.end() )
 {
 std::iter_swap( i, m_listeners.end() - 1 );
 m_listeners.pop_back();
 }
}
 
 
void SCHEMATIC::RemoveAllListeners()
{
 m_listeners.clear();
}
 
 
void SCHEMATIC::RecordERCExclusions()
{
 SCH_SHEET_LIST sheetList = GetSheets();
 ERC_SETTINGS& ercSettings = ErcSettings();
 
 ercSettings.m_ErcExclusions.clear();
 ercSettings.m_ErcExclusionComments.clear();
 
 for( unsigned i = 0; i < sheetList.size(); i++ )
 {
 for( SCH_ITEM* item : sheetList[i].LastScreen()->Items().OfType( SCH_MARKER_T ) )
 {
 SCH_MARKER* marker = static_cast<SCH_MARKER*>( item );
 
 if( marker->IsExcluded() )
 {
 wxString serialized = marker->SerializeToString();
 ercSettings.m_ErcExclusions.insert( serialized );
 ercSettings.m_ErcExclusionComments[ serialized ] = marker->GetComment();
 }
 }
 }
}
 
 
void SCHEMATIC::ResolveERCExclusionsPostUpdate()
{
 SCH_SHEET_LIST sheetList = GetSheets();
 
 for( SCH_MARKER* marker : ResolveERCExclusions() )
 {
 SCH_SHEET_PATH errorPath;
 ignore_unused( sheetList.GetItem( marker->GetRCItem()->GetMainItemID(), &errorPath ) );
 
 if( errorPath.LastScreen() )
 errorPath.LastScreen()->Append( marker );
 else
 RootScreen()->Append( marker );
 }
}