sch_sheet_path.cpp

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/*
 * This program source code file is part of KiCad, a free EDA CAD application.
 *
 * Copyright (C) 2017 Jean-Pierre Charras, jp.charras at wanadoo.fr
 * Copyright (C) 2011 Wayne Stambaugh <[email protected]>
 * Copyright (C) 1992-2023 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 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 <sch_screen.h>
#include <sch_item.h>
#include <sch_marker.h>
#include <sch_label.h>
#include <sch_reference_list.h>
#include <symbol_library.h>
#include <sch_sheet_path.h>
#include <sch_symbol.h>
#include <sch_sheet.h>
#include <schematic.h>
#include <template_fieldnames.h>
#include <trace_helpers.h>
 
#include <boost/functional/hash.hpp>
#include <wx/filename.h>
#include <wx/log.h>
 
 
class DELETED_SHEET_ITEM : public SCH_ITEM
{
public:
 DELETED_SHEET_ITEM() :
 SCH_ITEM( nullptr, NOT_USED )
 {}
 
 wxString GetItemDescription( UNITS_PROVIDER* aUnitsProvider ) const override
 {
 return _( "(Deleted Item)" );
 }
 
 wxString GetClass() const override
 {
 return wxT( "DELETED_SHEET_ITEM" );
 }
 
 static DELETED_SHEET_ITEM* GetInstance()
 {
 static DELETED_SHEET_ITEM* item = nullptr;
 
 if( !item )
 item = new DELETED_SHEET_ITEM();
 
 return item;
 }
 
 // pure virtuals:
 void SetPosition( const VECTOR2I& ) override {}
 void Print( const RENDER_SETTINGS* aSettings, const VECTOR2I& aOffset ) override {}
 void Move( const VECTOR2I& aMoveVector ) override {}
 void MirrorHorizontally( int aCenter ) override {}
 void MirrorVertically( int aCenter ) override {}
 void Rotate( const VECTOR2I& aCenter ) override {}
 
#if defined(DEBUG)
 void Show( int , std::ostream& ) const override {}
#endif
};
 
 
bool SortSymbolInstancesByProjectUuid( const SCH_SYMBOL_INSTANCE& aLhs,
 const SCH_SYMBOL_INSTANCE& aRhs )
{
 wxCHECK( !aLhs.m_Path.empty() && !aRhs.m_Path.empty(), false );
 
 return aLhs.m_Path[0] < aRhs.m_Path[0];
}
 
 
namespace std
{
 size_t hash<SCH_SHEET_PATH>::operator()( const SCH_SHEET_PATH& path ) const
 {
 return path.GetCurrentHash();
 }
}
 
 
SCH_SHEET_PATH::SCH_SHEET_PATH()
{
 m_virtualPageNumber = 1;
 m_current_hash = 0;
}
 
 
SCH_SHEET_PATH::SCH_SHEET_PATH( const SCH_SHEET_PATH& aOther )
{
 initFromOther( aOther );
}
 
 
SCH_SHEET_PATH& SCH_SHEET_PATH::operator=( const SCH_SHEET_PATH& aOther )
{
 initFromOther( aOther );
 return *this;
}
 
 
SCH_SHEET_PATH SCH_SHEET_PATH::operator+( const SCH_SHEET_PATH& aOther )
{
 SCH_SHEET_PATH retv = *this;
 
 size_t size = aOther.size();
 
 for( size_t i = 0; i < size; i++ )
 retv.push_back( aOther.at( i ) );
 
 return retv;
}
 
 
void SCH_SHEET_PATH::initFromOther( const SCH_SHEET_PATH& aOther )
{
 m_sheets = aOther.m_sheets;
 m_virtualPageNumber = aOther.m_virtualPageNumber;
 m_current_hash = aOther.m_current_hash;
 
 // Note: don't copy m_recursion_test_cache as it is slow and we want SCH_SHEET_PATHS to be
 // very fast to construct for use in the connectivity algorithm.
}
 
 
bool SCH_SHEET_PATH::IsFullPath() const
{
 // The root sheet path is empty. All other sheet paths must start with the root sheet path.
 return ( m_sheets.size() == 0 ) || ( GetSheet( 0 )->IsRootSheet() );
}
 
 
void SCH_SHEET_PATH::Rehash()
{
 m_current_hash = 0;
 
 for( SCH_SHEET* sheet : m_sheets )
 boost::hash_combine( m_current_hash, sheet->m_Uuid.Hash() );
}
 
 
int SCH_SHEET_PATH::Cmp( const SCH_SHEET_PATH& aSheetPathToTest ) const
{
 if( size() > aSheetPathToTest.size() )
 return 1;
 
 if( size() < aSheetPathToTest.size() )
 return -1;
 
 //otherwise, same number of sheets.
 for( unsigned i = 0; i < size(); i++ )
 {
 if( at( i )->m_Uuid < aSheetPathToTest.at( i )->m_Uuid )
 return -1;
 
 if( at( i )->m_Uuid != aSheetPathToTest.at( i )->m_Uuid )
 return 1;
 }
 
 return 0;
}
 
 
int SCH_SHEET_PATH::ComparePageNum( const SCH_SHEET_PATH& aSheetPathToTest ) const
{
 wxString pageA = this->GetPageNumber();
 wxString pageB = aSheetPathToTest.GetPageNumber();
 
 int pageNumComp = SCH_SHEET::ComparePageNum( pageA, pageB );
 
 if( pageNumComp == 0 )
 {
 int virtualPageA = GetVirtualPageNumber();
 int virtualPageB = aSheetPathToTest.GetVirtualPageNumber();
 
 if( virtualPageA > virtualPageB )
 pageNumComp = 1;
 else if( virtualPageA < virtualPageB )
 pageNumComp = -1;
 }
 
 return pageNumComp;
}
 
 
bool SCH_SHEET_PATH::IsContainedWithin( const SCH_SHEET_PATH& aSheetPathToTest ) const
{
 if( aSheetPathToTest.size() > size() )
 return false;
 
 for( size_t i = 0; i < aSheetPathToTest.size(); ++i )
 {
 if( at( i )->m_Uuid != aSheetPathToTest.at( i )->m_Uuid )
 {
 wxLogTrace( traceSchSheetPaths, "Sheet path '%s' is not within path '%s'.",
 aSheetPathToTest.Path().AsString(), Path().AsString() );
 
 return false;
 }
 }
 
 wxLogTrace( traceSchSheetPaths, "Sheet path '%s' is within path '%s'.",
 aSheetPathToTest.Path().AsString(), Path().AsString() );
 
 return true;
}
 
 
SCH_SHEET* SCH_SHEET_PATH::Last() const
{
 if( !empty() )
 return m_sheets.back();
 
 return nullptr;
}
 
 
SCH_SCREEN* SCH_SHEET_PATH::LastScreen()
{
 SCH_SHEET* lastSheet = Last();
 
 if( lastSheet )
 return lastSheet->GetScreen();
 
 return nullptr;
}
 
 
SCH_SCREEN* SCH_SHEET_PATH::LastScreen() const
{
 SCH_SHEET* lastSheet = Last();
 
 if( lastSheet )
 return lastSheet->GetScreen();
 
 return nullptr;
}
 
 
wxString SCH_SHEET_PATH::PathAsString() const
{
 wxString s;
 
 s = wxT( "/" ); // This is the root path
 
 // Start at 1 to avoid the root sheet, which does not need to be added to the path.
 // Its timestamp changes anyway.
 for( unsigned i = 1; i < size(); i++ )
 s += at( i )->m_Uuid.AsString() + "/";
 
 return s;
}
 
 
KIID_PATH SCH_SHEET_PATH::Path() const
{
 KIID_PATH path;
 
 for( const SCH_SHEET* sheet : m_sheets )
 path.push_back( sheet->m_Uuid );
 
 return path;
}
 
 
wxString SCH_SHEET_PATH::PathHumanReadable( bool aUseShortRootName,
 bool aStripTrailingSeparator ) const
{
 wxString s;
 
 if( aUseShortRootName )
 {
 s = wxS( "/" ); // Use only the short name in netlists
 }
 else
 {
 wxString fileName;
 
 if( !empty() && at( 0 )->GetScreen() )
 fileName = at( 0 )->GetScreen()->GetFileName();
 
 wxFileName fn = fileName;
 
 s = fn.GetName() + wxS( "/" );
 }
 
 // Start at 1 since we've already processed the root sheet.
 for( unsigned i = 1; i < size(); i++ )
 s << at( i )->GetFields()[SHEETNAME].GetShownText( false ) << wxS( "/" );
 
 if( aStripTrailingSeparator && s.EndsWith( "/" ) )
 s = s.Left( s.length() - 1 );
 
 return s;
}
 
 
void SCH_SHEET_PATH::UpdateAllScreenReferences() const
{
 std::vector<SCH_ITEM*> items;
 
 std::copy_if( LastScreen()->Items().begin(), LastScreen()->Items().end(),
 std::back_inserter( items ),
 []( SCH_ITEM* aItem )
 {
 return ( aItem->Type() == SCH_SYMBOL_T || aItem->Type() == SCH_GLOBAL_LABEL_T );
 } );
 
 for( SCH_ITEM* item : items )
 {
 if( item->Type() == SCH_SYMBOL_T )
 {
 SCH_SYMBOL* symbol = static_cast<SCH_SYMBOL*>( item );
 
 symbol->GetField( REFERENCE_FIELD )->SetText( symbol->GetRef( this ) );
 symbol->UpdateUnit( symbol->GetUnitSelection( this ) );
 LastScreen()->Update( item, false );
 }
 else if( item->Type() == SCH_GLOBAL_LABEL_T )
 {
 SCH_GLOBALLABEL* label = static_cast<SCH_GLOBALLABEL*>( item );
 
 if( label->GetFields().size() > 0 ) // Possible when reading a legacy .sch schematic
 {
 SCH_FIELD& intersheetRefs = label->GetFields()[0];
 
 // Fixup for legacy files which didn't store a position for the intersheet refs
 // unless they were shown.
 if( label->GetFields().size() == 1
 && intersheetRefs.GetInternalName() == wxT( "Intersheet References" )
 && intersheetRefs.GetPosition() == VECTOR2I( 0, 0 )
 && !intersheetRefs.IsVisible() )
 {
 label->AutoplaceFields( LastScreen(), false );
 }
 
 intersheetRefs.SetVisible( label->Schematic()->Settings().m_IntersheetRefsShow );
 LastScreen()->Update( &intersheetRefs );
 }
 }
 }
}
 
 
 
void SCH_SHEET_PATH::GetSymbols( SCH_REFERENCE_LIST& aReferences, bool aIncludePowerSymbols,
 bool aForceIncludeOrphanSymbols ) const
{
 for( SCH_ITEM* item : LastScreen()->Items().OfType( SCH_SYMBOL_T ) )
 {
 SCH_SYMBOL* symbol = static_cast<SCH_SYMBOL*>( item );
 AppendSymbol( aReferences, symbol, aIncludePowerSymbols, aForceIncludeOrphanSymbols );
 }
}
 
 
void SCH_SHEET_PATH::AppendSymbol( SCH_REFERENCE_LIST& aReferences, SCH_SYMBOL* aSymbol,
 bool aIncludePowerSymbols,
 bool aForceIncludeOrphanSymbols ) const
{
 // Skip pseudo-symbols, which have a reference starting with #. This mainly
 // affects power symbols.
 if( aIncludePowerSymbols || aSymbol->GetRef( this )[0] != wxT( '#' ) )
 {
 LIB_SYMBOL* symbol = aSymbol->GetLibSymbolRef().get();
 
 if( symbol || aForceIncludeOrphanSymbols )
 {
 SCH_REFERENCE schReference( aSymbol, symbol, *this );
 
 schReference.SetSheetNumber( m_virtualPageNumber );
 aReferences.AddItem( schReference );
 }
 }
}
 
 
void SCH_SHEET_PATH::GetMultiUnitSymbols( SCH_MULTI_UNIT_REFERENCE_MAP& aRefList,
 bool aIncludePowerSymbols ) const
{
 for( SCH_ITEM* item : LastScreen()->Items().OfType( SCH_SYMBOL_T ) )
 {
 SCH_SYMBOL* symbol = static_cast<SCH_SYMBOL*>( item );
 AppendMultiUnitSymbol( aRefList, symbol, aIncludePowerSymbols );
 }
}
 
 
void SCH_SHEET_PATH::AppendMultiUnitSymbol( SCH_MULTI_UNIT_REFERENCE_MAP& aRefList,
 SCH_SYMBOL* aSymbol,
 bool aIncludePowerSymbols ) const
{
 // Skip pseudo-symbols, which have a reference starting with #. This mainly
 // affects power symbols.
 if( !aIncludePowerSymbols && aSymbol->GetRef( this )[0] == wxT( '#' ) )
 return;
 
 LIB_SYMBOL* symbol = aSymbol->GetLibSymbolRef().get();
 
 if( symbol && symbol->GetUnitCount() > 1 )
 {
 SCH_REFERENCE schReference = SCH_REFERENCE( aSymbol, symbol, *this );
 schReference.SetSheetNumber( m_virtualPageNumber );
 wxString reference_str = schReference.GetRef();
 
 // Never lock unassigned references
 if( reference_str[reference_str.Len() - 1] == '?' )
 return;
 
 aRefList[reference_str].AddItem( schReference );
 }
}
 
 
bool SCH_SHEET_PATH::operator==( const SCH_SHEET_PATH& d1 ) const
{
 return m_current_hash == d1.GetCurrentHash();
}
 
 
bool SCH_SHEET_PATH::TestForRecursion( const wxString& aSrcFileName, const wxString& aDestFileName )
{
 auto pair = std::make_pair( aSrcFileName, aDestFileName );
 
 if( m_recursion_test_cache.count( pair ) )
 return m_recursion_test_cache.at( pair );
 
 SCHEMATIC* sch = LastScreen()->Schematic();
 
 wxCHECK_MSG( sch, false, "No SCHEMATIC found in SCH_SHEET_PATH::TestForRecursion!" );
 
 wxFileName rootFn = sch->GetFileName();
 wxFileName srcFn = aSrcFileName;
 wxFileName destFn = aDestFileName;
 
 if( srcFn.IsRelative() )
 srcFn.MakeAbsolute( rootFn.GetPath() );
 
 if( destFn.IsRelative() )
 destFn.MakeAbsolute( rootFn.GetPath() );
 
 
 // The source and destination sheet file names cannot be the same.
 if( srcFn == destFn )
 {
 m_recursion_test_cache[pair] = true;
 return true;
 }
 
 unsigned i = 0;
 
 while( i < size() )
 {
 wxFileName cmpFn = at( i )->GetFileName();
 
 if( cmpFn.IsRelative() )
 cmpFn.MakeAbsolute( rootFn.GetPath() );
 
 // Test if the file name of the destination sheet is in anywhere in this sheet path.
 if( cmpFn == destFn )
 break;
 
 i++;
 }
 
 // The destination sheet file name was not found in the sheet path or the destination
 // sheet file name is the root sheet so no recursion is possible.
 if( i >= size() || i == 0 )
 {
 m_recursion_test_cache[pair] = false;
 return false;
 }
 
 // Walk back up to the root sheet to see if the source file name is already a parent in
 // the sheet path. If so, recursion will occur.
 do
 {
 i -= 1;
 
 wxFileName cmpFn = at( i )->GetFileName();
 
 if( cmpFn.IsRelative() )
 cmpFn.MakeAbsolute( rootFn.GetPath() );
 
 if( cmpFn == srcFn )
 {
 m_recursion_test_cache[pair] = true;
 return true;
 }
 
 } while( i != 0 );
 
 // The source sheet file name is not a parent of the destination sheet file name.
 m_recursion_test_cache[pair] = false;
 return false;
}
 
 
wxString SCH_SHEET_PATH::GetPageNumber() const
{
 SCH_SHEET* sheet = Last();
 
 wxCHECK( sheet, wxEmptyString );
 
 SCH_SHEET_PATH tmpPath = *this;
 
 tmpPath.pop_back();
 
 return sheet->getPageNumber( tmpPath );
}
 
 
void SCH_SHEET_PATH::SetPageNumber( const wxString& aPageNumber )
{
 SCH_SHEET* sheet = Last();
 
 wxCHECK( sheet, /* void */ );
 
 SCH_SHEET_PATH tmpPath = *this;
 
 tmpPath.pop_back();
 
 sheet->addInstance( tmpPath );
 sheet->setPageNumber( tmpPath, aPageNumber );
}
 
 
void SCH_SHEET_PATH::AddNewSymbolInstances( const SCH_SHEET_PATH& aPrefixSheetPath )
{
 SCH_SHEET_PATH newSheetPath( aPrefixSheetPath );
 SCH_SHEET_PATH currentSheetPath( *this );
 
 // Prefix the new hierarchical path.
 newSheetPath = newSheetPath + currentSheetPath;
 
 for( SCH_ITEM* item : LastScreen()->Items().OfType( SCH_SYMBOL_T ) )
 {
 SCH_SYMBOL* symbol = static_cast<SCH_SYMBOL*>( item );
 
 wxCHECK2( symbol, continue );
 
 SCH_SYMBOL_INSTANCE newSymbolInstance;
 
 if( symbol->GetInstance( newSymbolInstance, Path(), true ) )
 {
 // Use an existing symbol instance for this path if it exists.
 newSymbolInstance.m_Path = newSheetPath.Path();
 symbol->AddHierarchicalReference( newSymbolInstance );
 }
 else if( !symbol->GetInstanceReferences().empty() )
 {
 // Use the first symbol instance if any symbol instance data exists.
 newSymbolInstance = symbol->GetInstanceReferences()[0];
 newSymbolInstance.m_Path = newSheetPath.Path();
 symbol->AddHierarchicalReference( newSymbolInstance );
 }
 else
 {
 // Fall back to the last saved symbol field and unit settings if there is no
 // instance data.
 newSymbolInstance.m_Path = newSheetPath.Path();
 newSymbolInstance.m_Reference = symbol->GetField( REFERENCE_FIELD )->GetText();
 newSymbolInstance.m_Unit = symbol->GetUnit();
 symbol->AddHierarchicalReference( newSymbolInstance );
 }
 }
}
 
 
void SCH_SHEET_PATH::RemoveSymbolInstances( const SCH_SHEET_PATH& aPrefixSheetPath )
{
 for( SCH_ITEM* item : LastScreen()->Items().OfType( SCH_SYMBOL_T ) )
 {
 SCH_SYMBOL* symbol = static_cast<SCH_SYMBOL*>( item );
 
 wxCHECK2( symbol, continue );
 
 SCH_SHEET_PATH fullSheetPath( aPrefixSheetPath );
 SCH_SHEET_PATH currentSheetPath( *this );
 
 // Prefix the hierarchical path of the symbol instance to be removed.
 fullSheetPath = fullSheetPath + currentSheetPath;
 symbol->RemoveInstance( fullSheetPath );
 }
}
 
 
void SCH_SHEET_PATH::MakeFilePathRelativeToParentSheet()
{
 wxCHECK( m_sheets.size() > 1, /* void */ );
 
 wxFileName sheetFileName = Last()->GetFileName();
 
 // If the sheet file name is absolute, then the user requested is so don't make it relative.
 if( sheetFileName.IsAbsolute() )
 return;
 
 SCH_SCREEN* screen = LastScreen();
 SCH_SCREEN* parentScreen = m_sheets[ m_sheets.size() - 2 ]->GetScreen();
 
 wxCHECK( screen && parentScreen, /* void */ );
 
 wxFileName fileName = screen->GetFileName();
 wxFileName parentFileName = parentScreen->GetFileName();
 
 // SCH_SCREEN file names must be absolute. If they are not, someone set them incorrectly
 // on load or on creation.
 wxCHECK( fileName.IsAbsolute() && parentFileName.IsAbsolute(), /* void */ );
 
 if( fileName.GetPath() == parentFileName.GetPath() )
 {
 Last()->SetFileName( fileName.GetFullName() );
 }
 else if( fileName.MakeRelativeTo( parentFileName.GetPath() ) )
 {
 Last()->SetFileName( fileName.GetFullPath() );
 }
 else
 {
 Last()->SetFileName( screen->GetFileName() );
 }
 
 wxLogTrace( tracePathsAndFiles,
 wxT( "\n File name: '%s'"
 "\n parent file name '%s',"
 "\n sheet '%s' file name '%s'." ),
 screen->GetFileName(), parentScreen->GetFileName(), PathHumanReadable(),
 Last()->GetFileName() );
}
 
 
SCH_SHEET_LIST::SCH_SHEET_LIST( SCH_SHEET* aSheet, bool aCheckIntegrity )
{
 if( aSheet != nullptr )
 {
 BuildSheetList( aSheet, aCheckIntegrity );
 
 if( aSheet->IsRootSheet() )
 SortByPageNumbers();
 }
}
 
 
void SCH_SHEET_LIST::BuildSheetList( SCH_SHEET* aSheet, bool aCheckIntegrity )
{
 wxCHECK_RET( aSheet != nullptr, wxT( "Cannot build sheet list from undefined sheet." ) );
 
 std::vector<SCH_SHEET*> badSheets;
 
 m_currentSheetPath.push_back( aSheet );
 m_currentSheetPath.SetVirtualPageNumber( static_cast<int>( size() ) + 1 );
 push_back( m_currentSheetPath );
 
 if( m_currentSheetPath.LastScreen() )
 {
 wxString parentFileName = aSheet->GetFileName();
 std::vector<SCH_ITEM*> childSheets;
 m_currentSheetPath.LastScreen()->GetSheets( &childSheets );
 
 for( SCH_ITEM* item : childSheets )
 {
 SCH_SHEET* sheet = static_cast<SCH_SHEET*>( item );
 
 if( aCheckIntegrity )
 {
 if( !m_currentSheetPath.TestForRecursion( sheet->GetFileName(), parentFileName ) )
 BuildSheetList( sheet, true );
 else
 badSheets.push_back( sheet );
 }
 else
 {
 BuildSheetList( sheet, false );
 }
 }
 }
 
 if( aCheckIntegrity )
 {
 for( SCH_SHEET* sheet : badSheets )
 {
 m_currentSheetPath.LastScreen()->Remove( sheet );
 m_currentSheetPath.LastScreen()->SetContentModified();
 }
 }
 
 m_currentSheetPath.pop_back();
}
 
 
void SCH_SHEET_LIST::SortByPageNumbers( bool aUpdateVirtualPageNums )
{
 std::sort( begin(), end(),
 []( SCH_SHEET_PATH a, SCH_SHEET_PATH b ) -> bool
 {
 int retval = a.ComparePageNum( b );
 
 if( retval < 0 )
 return true;
 else if( retval > 0 )
 return false;
 else 
 return a.GetCurrentHash() < b.GetCurrentHash();
 } );
 
 if( aUpdateVirtualPageNums )
 {
 int virtualPageNum = 1;
 
 for( SCH_SHEET_PATH& sheet : *this )
 {
 sheet.SetVirtualPageNumber( virtualPageNum++ );
 }
 }
}
 
 
bool SCH_SHEET_LIST::NameExists( const wxString& aSheetName ) const
{
 for( const SCH_SHEET_PATH& sheet : *this )
 {
 if( sheet.Last()->GetName() == aSheetName )
 return true;
 }
 
 return false;
}
 
 
bool SCH_SHEET_LIST::PageNumberExists( const wxString& aPageNumber ) const
{
 for( const SCH_SHEET_PATH& sheet : *this )
 {
 if( sheet.GetPageNumber() == aPageNumber )
 return true;
 }
 
 return false;
}
 
 
void SCH_SHEET_LIST::TrimToPageNumbers( const std::vector<wxString>& aPageInclusions )
{
 auto it = std::remove_if( begin(), end(),
 [&]( SCH_SHEET_PATH sheet )
 {
 return std::find( aPageInclusions.begin(), aPageInclusions.end(),
 sheet.GetPageNumber() )
 == aPageInclusions.end();
 } );
 
 erase( it, end() );
}
 
 
bool SCH_SHEET_LIST::IsModified() const
{
 for( const SCH_SHEET_PATH& sheet : *this )
 {
 if( sheet.LastScreen() && sheet.LastScreen()->IsContentModified() )
 return true;
 }
 
 return false;
}
 
 
void SCH_SHEET_LIST::ClearModifyStatus()
{
 for( const SCH_SHEET_PATH& sheet : *this )
 {
 if( sheet.LastScreen() )
 sheet.LastScreen()->SetContentModified( false );
 }
}
 
 
SCH_ITEM* SCH_SHEET_LIST::GetItem( const KIID& aID, SCH_SHEET_PATH* aPathOut ) const
{
 for( const SCH_SHEET_PATH& sheet : *this )
 {
 SCH_ITEM* item = sheet.GetItem( aID );
 
 if( item )
 {
 if( aPathOut )
 *aPathOut = sheet;
 
 return item;
 }
 }
 
 // Not found; weak reference has been deleted.
 return DELETED_SHEET_ITEM::GetInstance();
}
 
 
SCH_ITEM* SCH_SHEET_PATH::GetItem( const KIID& aID ) const
{
 for( SCH_ITEM* aItem : LastScreen()->Items() )
 {
 if( aItem->m_Uuid == aID )
 return aItem;
 
 SCH_ITEM* childMatch = nullptr;
 
 aItem->RunOnChildren(
 [&]( SCH_ITEM* aChild )
 {
 if( aChild->m_Uuid == aID )
 childMatch = aChild;
 } );
 
 if( childMatch )
 return childMatch;
 }
 
 return nullptr;
}
 
 
void SCH_SHEET_LIST::FillItemMap( std::map<KIID, EDA_ITEM*>& aMap )
{
 for( const SCH_SHEET_PATH& sheet : *this )
 {
 SCH_SCREEN* screen = sheet.LastScreen();
 
 for( SCH_ITEM* aItem : screen->Items() )
 {
 aMap[ aItem->m_Uuid ] = aItem;
 
 aItem->RunOnChildren(
 [&]( SCH_ITEM* aChild )
 {
 aMap[ aChild->m_Uuid ] = aChild;
 } );
 }
 }
}
 
 
void SCH_SHEET_LIST::AnnotatePowerSymbols()
{
 // List of reference for power symbols
 SCH_REFERENCE_LIST references;
 SCH_REFERENCE_LIST additionalreferences; // Todo: add as a parameter to this function
 
 // Map of locked symbols (not used, but needed by Annotate()
 SCH_MULTI_UNIT_REFERENCE_MAP lockedSymbols;
 
 // Build the list of power symbols:
 for( SCH_SHEET_PATH& sheet : *this )
 {
 for( SCH_ITEM* item : sheet.LastScreen()->Items().OfType( SCH_SYMBOL_T ) )
 {
 SCH_SYMBOL* symbol = static_cast<SCH_SYMBOL*>( item );
 LIB_SYMBOL* libSymbol = symbol->GetLibSymbolRef().get();
 
 if( libSymbol && libSymbol->IsPower() )
 {
 SCH_REFERENCE schReference( symbol, libSymbol, sheet );
 references.AddItem( schReference );
 }
 }
 }
 
 // Find duplicate, and silently clear annotation of duplicate
 std::map<wxString, int> ref_list; // stores the existing references
 
 for( unsigned ii = 0; ii< references.GetCount(); ++ii )
 {
 wxString curr_ref = references[ii].GetRef();
 
 if( ref_list.find( curr_ref ) == ref_list.end() )
 {
 ref_list[curr_ref] = ii;
 continue;
 }
 
 // Possible duplicate, if the ref ends by a number:
 if( curr_ref.Last() < '0' && curr_ref.Last() > '9' )
 continue; // not annotated
 
 // Duplicate: clear annotation by removing the number ending the ref
 while( curr_ref.Last() >= '0' && curr_ref.Last() <= '9' )
 curr_ref.RemoveLast();
 
 references[ii].SetRef( curr_ref );
 }
 
 // Break full symbol reference into name (prefix) and number:
 // example: IC1 become IC, and 1
 references.SplitReferences();
 
 // Ensure all power symbols have the reference starting by '#'
 // (Not sure this is really useful)
 for( unsigned ii = 0; ii< references.GetCount(); ++ii )
 {
 if( references[ii].GetRef()[0] != '#' )
 {
 wxString new_ref = "#" + references[ii].GetRef();
 references[ii].SetRef( new_ref );
 }
 }
 
 // Recalculate and update reference numbers in schematic
 references.Annotate( false, 0, 100, lockedSymbols, additionalreferences );
 references.UpdateAnnotation();
}
 
 
void SCH_SHEET_LIST::GetSymbols( SCH_REFERENCE_LIST& aReferences, bool aIncludePowerSymbols,
 bool aForceIncludeOrphanSymbols ) const
{
 for( const SCH_SHEET_PATH& sheet : *this )
 sheet.GetSymbols( aReferences, aIncludePowerSymbols, aForceIncludeOrphanSymbols );
}
 
 
void SCH_SHEET_LIST::GetSymbolsWithinPath( SCH_REFERENCE_LIST& aReferences,
 const SCH_SHEET_PATH& aSheetPath,
 bool aIncludePowerSymbols,
 bool aForceIncludeOrphanSymbols ) const
{
 for( const SCH_SHEET_PATH& sheet : *this )
 {
 if( sheet.IsContainedWithin( aSheetPath ) )
 sheet.GetSymbols( aReferences, aIncludePowerSymbols, aForceIncludeOrphanSymbols );
 }
}
 
 
void SCH_SHEET_LIST::GetSheetsWithinPath( SCH_SHEET_PATHS& aSheets,
 const SCH_SHEET_PATH& aSheetPath ) const
{
 for( const SCH_SHEET_PATH& sheet : *this )
 {
 if( sheet.IsContainedWithin( aSheetPath ) )
 aSheets.push_back( sheet );
 }
}
 
 
std::optional<SCH_SHEET_PATH> SCH_SHEET_LIST::GetSheetPathByKIIDPath( const KIID_PATH& aPath,
 bool aIncludeLastSheet ) const
{
 for( const SCH_SHEET_PATH& sheet : *this )
 {
 KIID_PATH testPath = sheet.Path();
 
 if( !aIncludeLastSheet )
 testPath.pop_back();
 
 if( testPath == aPath )
 return SCH_SHEET_PATH( sheet );
 }
 
 return std::nullopt;
}
 
 
void SCH_SHEET_LIST::GetMultiUnitSymbols( SCH_MULTI_UNIT_REFERENCE_MAP &aRefList,
 bool aIncludePowerSymbols ) const
{
 for( SCH_SHEET_PATHS::const_iterator it = begin(); it != end(); ++it )
 {
 SCH_MULTI_UNIT_REFERENCE_MAP tempMap;
 ( *it ).GetMultiUnitSymbols( tempMap, aIncludePowerSymbols );
 
 for( SCH_MULTI_UNIT_REFERENCE_MAP::value_type& pair : tempMap )
 {
 // Merge this list into the main one
 unsigned n_refs = pair.second.GetCount();
 
 for( unsigned thisRef = 0; thisRef < n_refs; ++thisRef )
 aRefList[pair.first].AddItem( pair.second[thisRef] );
 }
 }
}
 
 
bool SCH_SHEET_LIST::TestForRecursion( const SCH_SHEET_LIST& aSrcSheetHierarchy,
 const wxString& aDestFileName )
{
 if( empty() )
 return false;
 
 SCHEMATIC* sch = at( 0 ).LastScreen()->Schematic();
 
 wxCHECK_MSG( sch, false, "No SCHEMATIC found in SCH_SHEET_LIST::TestForRecursion!" );
 
 wxFileName rootFn = sch->GetFileName();
 wxFileName destFn = aDestFileName;
 
 if( destFn.IsRelative() )
 destFn.MakeAbsolute( rootFn.GetPath() );
 
 // Test each SCH_SHEET_PATH in this SCH_SHEET_LIST for potential recursion.
 for( unsigned i = 0; i < size(); i++ )
 {
 // Test each SCH_SHEET_PATH in the source sheet.
 for( unsigned j = 0; j < aSrcSheetHierarchy.size(); j++ )
 {
 const SCH_SHEET_PATH* sheetPath = &aSrcSheetHierarchy[j];
 
 for( unsigned k = 0; k < sheetPath->size(); k++ )
 {
 if( at( i ).TestForRecursion( sheetPath->GetSheet( k )->GetFileName(),
 aDestFileName ) )
 {
 return true;
 }
 }
 }
 }
 
 // The source sheet file can safely be added to the destination sheet file.
 return false;
}
 
 
SCH_SHEET_PATH* SCH_SHEET_LIST::FindSheetForPath( const SCH_SHEET_PATH* aPath )
{
 for( SCH_SHEET_PATH& path : *this )
 {
 if( path.Path() == aPath->Path() )
 return &path;
 }
 
 return nullptr;
}
 
 
SCH_SHEET_PATH SCH_SHEET_LIST::FindSheetForScreen( const SCH_SCREEN* aScreen )
{
 for( SCH_SHEET_PATH& sheetpath : *this )
 {
 if( sheetpath.LastScreen() == aScreen )
 return sheetpath;
 }
 
 return SCH_SHEET_PATH();
}
 
 
SCH_SHEET_LIST SCH_SHEET_LIST::FindAllSheetsForScreen( const SCH_SCREEN* aScreen ) const
{
 SCH_SHEET_LIST retval;
 
 for( const SCH_SHEET_PATH& sheetpath : *this )
 {
 if( sheetpath.LastScreen() == aScreen )
 retval.push_back( sheetpath );
 }
 
 return retval;
}
 
 
void SCH_SHEET_LIST::UpdateSymbolInstanceData(
 const std::vector<SCH_SYMBOL_INSTANCE>& aSymbolInstances )
{
 for( SCH_SHEET_PATH& sheetPath : *this )
 {
 for( SCH_ITEM* item : sheetPath.LastScreen()->Items().OfType( SCH_SYMBOL_T ) )
 {
 SCH_SYMBOL* symbol = static_cast<SCH_SYMBOL*>( item );
 
 wxCHECK2( symbol, continue );
 
 KIID_PATH sheetPathWithSymbolUuid = sheetPath.Path();
 sheetPathWithSymbolUuid.push_back( symbol->m_Uuid );
 
 auto it = std::find_if( aSymbolInstances.begin(), aSymbolInstances.end(),
 [ sheetPathWithSymbolUuid ]( const SCH_SYMBOL_INSTANCE& r ) -> bool
 {
 return sheetPathWithSymbolUuid == r.m_Path;
 } );
 
 if( it == aSymbolInstances.end() )
 {
 wxLogTrace( traceSchSheetPaths, "No symbol instance found for symbol '%s'",
 sheetPathWithSymbolUuid.AsString() );
 continue;
 }
 
 // Symbol instance paths are stored and looked up in memory with the root path so use
 // the full path here.
 symbol->AddHierarchicalReference( sheetPath.Path(), it->m_Reference, it->m_Unit );
 symbol->GetField( REFERENCE_FIELD )->SetText( it->m_Reference );
 
 if( !it->m_Value.IsEmpty() )
 symbol->SetValueFieldText( it->m_Value );
 
 if( !it->m_Footprint.IsEmpty() )
 symbol->SetFootprintFieldText( it->m_Footprint );
 
 symbol->UpdatePrefix();
 }
 }
}
 
 
void SCH_SHEET_LIST::UpdateSheetInstanceData( const std::vector<SCH_SHEET_INSTANCE>& aSheetInstances )
{
 
 for( SCH_SHEET_PATH& path : *this )
 {
 SCH_SHEET* sheet = path.Last();
 
 wxCHECK2( sheet && path.Last(), continue );
 
 auto it = std::find_if( aSheetInstances.begin(), aSheetInstances.end(),
 [ path ]( const SCH_SHEET_INSTANCE& r ) -> bool
 {
 return path.Path() == r.m_Path;
 } );
 
 if( it == aSheetInstances.end() )
 {
 wxLogTrace( traceSchSheetPaths, "No sheet instance found for path '%s'",
 path.Path().AsString() );
 continue;
 }
 
 wxLogTrace( traceSchSheetPaths, "Setting sheet '%s' instance '%s' page number '%s'",
 ( sheet->GetName().IsEmpty() ) ? wxString( wxT( "root" ) ) : sheet->GetName(),
 path.Path().AsString(), it->m_PageNumber );
 path.SetPageNumber( it->m_PageNumber );
 }
}
 
 
std::vector<KIID_PATH> SCH_SHEET_LIST::GetPaths() const
{
 std::vector<KIID_PATH> paths;
 
 for( const SCH_SHEET_PATH& sheetPath : *this )
 paths.emplace_back( sheetPath.Path() );
 
 return paths;
}
 
 
std::vector<SCH_SHEET_INSTANCE> SCH_SHEET_LIST::GetSheetInstances() const
{
 std::vector<SCH_SHEET_INSTANCE> retval;
 
 for( const SCH_SHEET_PATH& path : *this )
 {
 const SCH_SHEET* sheet = path.Last();
 
 wxCHECK2( sheet, continue );
 
 SCH_SHEET_INSTANCE instance;
 SCH_SHEET_PATH tmpPath = path;
 
 tmpPath.pop_back();
 instance.m_Path = tmpPath.Path();
 instance.m_PageNumber = path.GetPageNumber();
 
 retval.push_back( instance );
 }
 
 return retval;
}
 
 
bool SCH_SHEET_LIST::AllSheetPageNumbersEmpty() const
{
 for( const SCH_SHEET_PATH& instance : *this )
 {
 if( !instance.GetPageNumber().IsEmpty() )
 return false;
 }
 
 return true;
}
 
 
void SCH_SHEET_LIST::SetInitialPageNumbers()
{
 // Don't accidentally renumber existing sheets.
 wxCHECK( AllSheetPageNumbersEmpty(), /* void */ );
 
 wxString tmp;
 int pageNumber = 1;
 
 for( SCH_SHEET_PATH& instance : *this )
 {
 tmp.Printf( "%d", pageNumber );
 instance.SetPageNumber( tmp );
 pageNumber += 1;
 }
}
 
 
void SCH_SHEET_LIST::AddNewSymbolInstances( const SCH_SHEET_PATH& aPrefixSheetPath )
{
 for( SCH_SHEET_PATH& sheetPath : *this )
 sheetPath.AddNewSymbolInstances( aPrefixSheetPath );
}
 
 
void SCH_SHEET_LIST::RemoveSymbolInstances( const SCH_SHEET_PATH& aPrefixSheetPath )
{
 for( SCH_SHEET_PATH& sheetPath : *this )
 sheetPath.RemoveSymbolInstances( aPrefixSheetPath );
}
 
 
void SCH_SHEET_LIST::AddNewSheetInstances( const SCH_SHEET_PATH& aPrefixSheetPath,
 int aLastVirtualPageNumber )
{
 wxString pageNumber;
 int lastUsedPageNumber = 1;
 int nextVirtualPageNumber = aLastVirtualPageNumber;
 
 // Fetch the list of page numbers already in use.
 std::vector< wxString > usedPageNumbers;
 
 if( aPrefixSheetPath.size() )
 {
 SCH_SHEET_LIST prefixHierarchy( aPrefixSheetPath.at( 0 ) );
 
 for( const SCH_SHEET_PATH& path : prefixHierarchy )
 {
 pageNumber = path.GetPageNumber();
 
 if( !pageNumber.IsEmpty() )
 usedPageNumbers.emplace_back( pageNumber );
 }
 }
 
 for( SCH_SHEET_PATH& sheetPath : *this )
 {
 SCH_SHEET_PATH tmp( sheetPath );
 SCH_SHEET_PATH newSheetPath( aPrefixSheetPath );
 
 // Prefix the new hierarchical path.
 newSheetPath = newSheetPath + sheetPath;
 
 // Sheets cannot have themselves in the path.
 tmp.pop_back();
 
 SCH_SHEET* sheet = sheetPath.Last();
 
 wxCHECK2( sheet, continue );
 
 nextVirtualPageNumber += 1;
 
 SCH_SHEET_INSTANCE instance;
 
 // Add the instance if it doesn't already exist
 if( !sheet->getInstance( instance, tmp.Path(), true ) )
 {
 sheet->addInstance( tmp );
 sheet->getInstance( instance, tmp.Path(), true );
 }
 
 // Get a new page number if we don't have one
 if( instance.m_PageNumber.IsEmpty() )
 {
 // Generate the next available page number.
 do
 {
 pageNumber.Printf( wxT( "%d" ), lastUsedPageNumber );
 lastUsedPageNumber += 1;
 } while( std::find( usedPageNumbers.begin(), usedPageNumbers.end(), pageNumber ) !=
 usedPageNumbers.end() );
 
 instance.m_PageNumber = pageNumber;
 newSheetPath.SetVirtualPageNumber( nextVirtualPageNumber );
 }
 
 newSheetPath.SetPageNumber( instance.m_PageNumber );
 usedPageNumbers.push_back( instance.m_PageNumber );
 }
}
 
 
int SCH_SHEET_LIST::GetLastVirtualPageNumber() const
{
 int lastVirtualPageNumber = 1;
 
 for( const SCH_SHEET_PATH& sheetPath : *this )
 {
 if( sheetPath.GetVirtualPageNumber() > lastVirtualPageNumber )
 lastVirtualPageNumber = sheetPath.GetVirtualPageNumber();
 }
 
 return lastVirtualPageNumber;
}
 
 
bool SCH_SHEET_LIST::HasPath( const KIID_PATH& aPath ) const
{
 for( const SCH_SHEET_PATH& path : *this )
 {
 if( path.Path() == aPath )
 return true;
 }
 
 return false;
}