project_rescue.cpp

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/*
 * This program source code file is part of KiCad, a free EDA CAD application.
 *
 * Copyright (C) 2015 Chris Pavlina <[email protected]>
 * Copyright (C) 2015-2023 KiCad Developers, see change_log.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_draw_panel.h>
#include <symbol_library.h>
#include <confirm.h>
#include <connection_graph.h>
#include <invoke_sch_dialog.h>
#include <kiway.h>
#include <symbol_viewer_frame.h>
#include <project_rescue.h>
#include <project_sch.h>
#include <sch_symbol.h>
#include <sch_sheet.h>
#include <sch_edit_frame.h>
#include <schematic.h>
#include <string_utils.h>
#include <symbol_lib_table.h>
#include <wildcards_and_files_ext.h>
#include <project_sch.h>
#include <wx/msgdlg.h>
 
#include <cctype>
#include <map>
 
 
typedef std::pair<SCH_SYMBOL*, wxString> SYMBOL_NAME_PAIR;
 
 
// Helper sort function, used in getSymbols, to sort a symbol list by lib_id
static bool sort_by_libid( const SCH_SYMBOL* ref, SCH_SYMBOL* cmp )
{
 return ref->GetLibId() < cmp->GetLibId();
}
 
 
static void getSymbols( SCHEMATIC* aSchematic, std::vector<SCH_SYMBOL*>& aSymbols )
{
 SCH_SCREENS screens( aSchematic->Root() );
 
 // Get the full list
 for( SCH_SCREEN* screen = screens.GetFirst(); screen; screen = screens.GetNext() )
 {
 for( EDA_ITEM* aItem : screen->Items().OfType( SCH_SYMBOL_T ) )
 aSymbols.push_back( static_cast<SCH_SYMBOL*>( aItem ) );
 }
 
 if( aSymbols.empty() )
 return;
 
 // sort aSymbols by lib symbol. symbols will be grouped by same lib symbol.
 std::sort( aSymbols.begin(), aSymbols.end(), sort_by_libid );
}
 
 
static LIB_SYMBOL* findSymbol( const wxString& aName, SYMBOL_LIBS* aLibs, bool aCached )
{
 LIB_SYMBOL *symbol = nullptr;
 
 for( SYMBOL_LIB& each_lib : *aLibs )
 {
 if( aCached && !each_lib.IsCache() )
 continue;
 
 if( !aCached && each_lib.IsCache() )
 continue;
 
 symbol = each_lib.FindSymbol( aName );
 
 if( symbol )
 break;
 }
 
 return symbol;
}
 
 
static wxFileName GetRescueLibraryFileName( SCHEMATIC* aSchematic )
{
 wxFileName fn = aSchematic->GetFileName();
 fn.SetName( fn.GetName() + wxT( "-rescue" ) );
 fn.SetExt( FILEEXT::LegacySymbolLibFileExtension );
 return fn;
}
 
 
RESCUE_CASE_CANDIDATE::RESCUE_CASE_CANDIDATE( const wxString& aRequestedName,
 const wxString& aNewName,
 LIB_SYMBOL* aLibCandidate,
 int aUnit,
 int aConvert )
{
 m_requested_name = aRequestedName;
 m_new_name = aNewName;
 m_lib_candidate = aLibCandidate;
 m_unit = aUnit;
 m_convert = aConvert;
}
 
 
void RESCUE_CASE_CANDIDATE::FindRescues( RESCUER& aRescuer,
 boost::ptr_vector<RESCUE_CANDIDATE>& aCandidates )
{
 typedef std::map<wxString, RESCUE_CASE_CANDIDATE> candidate_map_t;
 candidate_map_t candidate_map;
 
 // Remember the list of symbols is sorted by symbol name.
 // So a search in libraries is made only once by group
 LIB_SYMBOL* case_sensitive_match = nullptr;
 std::vector<LIB_SYMBOL*> case_insensitive_matches;
 
 wxString symbol_name;
 wxString last_symbol_name;
 
 for( SCH_SYMBOL* eachSymbol : *( aRescuer.GetSymbols() ) )
 {
 symbol_name = eachSymbol->GetLibId().GetUniStringLibItemName();
 
 if( last_symbol_name != symbol_name )
 {
 // A new symbol name is found (a new group starts here).
 // Search the symbol names candidates only once for this group:
 last_symbol_name = symbol_name;
 case_insensitive_matches.clear();
 
 LIB_ID id( wxEmptyString, symbol_name );
 
 case_sensitive_match = PROJECT_SCH::SchLibs( aRescuer.GetPrj() )->FindLibSymbol( id );
 
 if( case_sensitive_match )
 continue;
 
 // If the case sensitive match failed, try a case insensitive match.
 PROJECT_SCH::SchLibs( aRescuer.GetPrj() )
 ->FindLibraryNearEntries( case_insensitive_matches,
 symbol_name );
 
 // If there are not case insensitive matches either, the symbol cannot be rescued.
 if( !case_insensitive_matches.size() )
 continue;
 
 RESCUE_CASE_CANDIDATE candidate( symbol_name, case_insensitive_matches[0]->GetName(),
 case_insensitive_matches[0],
 eachSymbol->GetUnit(),
 eachSymbol->GetBodyStyle() );
 
 candidate_map[symbol_name] = candidate;
 }
 }
 
 // Now, dump the map into aCandidates
 for( const candidate_map_t::value_type& each_pair : candidate_map )
 {
 aCandidates.push_back( new RESCUE_CASE_CANDIDATE( each_pair.second ) );
 }
}
 
 
wxString RESCUE_CASE_CANDIDATE::GetActionDescription() const
{
 wxString action;
 action.Printf( _( "Rename %s to %s" ), m_requested_name, m_new_name );
 return action;
}
 
 
bool RESCUE_CASE_CANDIDATE::PerformAction( RESCUER* aRescuer )
{
 wxCHECK( m_lib_candidate, true );
 
 std::unique_ptr<LIB_SYMBOL> new_symbol = m_lib_candidate->Flatten();
 new_symbol->SetName( m_new_name );
 aRescuer->AddSymbol( new_symbol.get() );
 
 for( SCH_SYMBOL* eachSymbol : *aRescuer->GetSymbols() )
 {
 if( eachSymbol->GetLibId().GetLibItemName() != UTF8( m_requested_name ) )
 continue;
 
 LIB_ID libId;
 
 libId.SetLibItemName( m_new_name );
 eachSymbol->SetLibId( libId );
 eachSymbol->ClearFlags();
 aRescuer->LogRescue( eachSymbol, m_requested_name, m_new_name );
 }
 
 return true;
}
 
 
RESCUE_CACHE_CANDIDATE::RESCUE_CACHE_CANDIDATE( const wxString& aRequestedName,
 const wxString& aNewName,
 LIB_SYMBOL* aCacheCandidate,
 LIB_SYMBOL* aLibCandidate,
 int aUnit,
 int aConvert )
{
 m_requested_name = aRequestedName;
 m_new_name = aNewName;
 m_cache_candidate = aCacheCandidate;
 m_lib_candidate = aLibCandidate;
 m_unit = aUnit;
 m_convert = aConvert;
}
 
 
RESCUE_CACHE_CANDIDATE::RESCUE_CACHE_CANDIDATE()
{
 m_cache_candidate = nullptr;
 m_lib_candidate = nullptr;
}
 
 
void RESCUE_CACHE_CANDIDATE::FindRescues( RESCUER& aRescuer,
 boost::ptr_vector<RESCUE_CANDIDATE>& aCandidates )
{
 typedef std::map<wxString, RESCUE_CACHE_CANDIDATE> candidate_map_t;
 candidate_map_t candidate_map;
 
 // Remember the list of symbols is sorted by symbol name.
 // So a search in libraries is made only once by group
 LIB_SYMBOL* cache_match = nullptr;
 LIB_SYMBOL* lib_match = nullptr;
 wxString symbol_name;
 wxString old_symbol_name;
 
 for( SCH_SYMBOL* eachSymbol : *( aRescuer.GetSymbols() ) )
 {
 symbol_name = eachSymbol->GetLibId().GetUniStringLibItemName();
 
 if( old_symbol_name != symbol_name )
 {
 // A new symbol name is found (a new group starts here).
 // Search the symbol names candidates only once for this group:
 old_symbol_name = symbol_name;
 cache_match = findSymbol( symbol_name, PROJECT_SCH::SchLibs( aRescuer.GetPrj() ), true );
 lib_match = findSymbol( symbol_name, PROJECT_SCH::SchLibs( aRescuer.GetPrj() ), false );
 
 // At some point during V5 development, the LIB_ID delimiter character ':' was
 // replaced by '_' when writing the symbol cache library so we have to test for
 // the LIB_NICKNAME_LIB_SYMBOL_NAME case.
 if( !cache_match && eachSymbol->GetLibId().IsValid() )
 {
 wxString tmp;
 
 tmp = eachSymbol->GetLibId().GetLibNickname().wx_str() + wxT( "_" ) +
 eachSymbol->GetLibId().GetLibItemName().wx_str();
 cache_match = findSymbol( tmp, PROJECT_SCH::SchLibs( aRescuer.GetPrj() ), true );
 }
 
 // Test whether there is a conflict or if the symbol can only be found in the cache
 // and the symbol name does not have any illegal characters.
 if( cache_match && lib_match &&
 !cache_match->PinsConflictWith( *lib_match, true, true, true, true, false ) )
 continue;
 
 if( !cache_match && lib_match )
 continue;
 
 // Check if the symbol has already been rescued.
 RESCUE_CACHE_CANDIDATE candidate( symbol_name, symbol_name, cache_match, lib_match,
 eachSymbol->GetUnit(), eachSymbol->GetBodyStyle() );
 
 candidate_map[symbol_name] = candidate;
 }
 }
 
 // Now, dump the map into aCandidates
 for( const candidate_map_t::value_type& each_pair : candidate_map )
 {
 aCandidates.push_back( new RESCUE_CACHE_CANDIDATE( each_pair.second ) );
 }
}
 
 
wxString RESCUE_CACHE_CANDIDATE::GetActionDescription() const
{
 wxString action;
 
 if( !m_cache_candidate && !m_lib_candidate )
 action.Printf( _( "Cannot rescue symbol %s which is not available in any library or "
 "the cache." ), m_requested_name );
 else if( m_cache_candidate && !m_lib_candidate )
 action.Printf( _( "Rescue symbol %s found only in cache library to %s." ),
 m_requested_name, m_new_name );
 else
 action.Printf( _( "Rescue modified symbol %s to %s" ),
 m_requested_name, m_new_name );
 
 return action;
}
 
 
bool RESCUE_CACHE_CANDIDATE::PerformAction( RESCUER* aRescuer )
{
 LIB_SYMBOL* tmp = ( m_cache_candidate ) ? m_cache_candidate : m_lib_candidate;
 
 // A symbol that cannot be rescued is a valid condition so just bail out here.
 if( !tmp )
 return true;
 
 std::unique_ptr<LIB_SYMBOL> new_symbol = tmp->Flatten();
 new_symbol->SetName( m_new_name );
 aRescuer->AddSymbol( new_symbol.get() );
 
 for( SCH_SYMBOL* eachSymbol : *aRescuer->GetSymbols() )
 {
 if( eachSymbol->GetLibId().GetLibItemName() != UTF8( m_requested_name ) )
 continue;
 
 LIB_ID libId;
 
 libId.SetLibItemName( m_new_name );
 eachSymbol->SetLibId( libId );
 eachSymbol->ClearFlags();
 aRescuer->LogRescue( eachSymbol, m_requested_name, m_new_name );
 }
 
 return true;
}
 
 
RESCUE_SYMBOL_LIB_TABLE_CANDIDATE::RESCUE_SYMBOL_LIB_TABLE_CANDIDATE(
 const LIB_ID& aRequestedId,
 const LIB_ID& aNewId,
 LIB_SYMBOL* aCacheCandidate,
 LIB_SYMBOL* aLibCandidate,
 int aUnit,
 int aConvert ) : RESCUE_CANDIDATE()
{
 m_requested_id = aRequestedId;
 m_requested_name = aRequestedId.Format().wx_str();
 m_new_id = aNewId;
 m_lib_candidate = aLibCandidate;
 m_cache_candidate = aCacheCandidate;
 m_unit = aUnit;
 m_convert = aConvert;
}
 
 
RESCUE_SYMBOL_LIB_TABLE_CANDIDATE::RESCUE_SYMBOL_LIB_TABLE_CANDIDATE()
{
 m_cache_candidate = nullptr;
 m_lib_candidate = nullptr;
}
 
 
void RESCUE_SYMBOL_LIB_TABLE_CANDIDATE::FindRescues(
 RESCUER& aRescuer,
 boost::ptr_vector<RESCUE_CANDIDATE>& aCandidates )
{
 typedef std::map<LIB_ID, RESCUE_SYMBOL_LIB_TABLE_CANDIDATE> candidate_map_t;
 
 candidate_map_t candidate_map;
 
 // Remember the list of symbols is sorted by LIB_ID.
 // So a search in libraries is made only once by group
 LIB_SYMBOL* cache_match = nullptr;
 LIB_SYMBOL* lib_match = nullptr;
 LIB_ID old_symbol_id;
 
 wxString symbolName;
 
 for( SCH_SYMBOL* eachSymbol : *( aRescuer.GetSymbols() ) )
 {
 const LIB_ID& symbol_id = eachSymbol->GetLibId();
 
 if( old_symbol_id != symbol_id )
 {
 // A new symbol name is found (a new group starts here).
 // Search the symbol names candidates only once for this group:
 old_symbol_id = symbol_id;
 
 symbolName = symbol_id.Format().wx_str();
 
 // Get the library symbol from the cache library. It will be a flattened
 // symbol by default (no inheritance).
 cache_match = findSymbol( symbolName, PROJECT_SCH::SchLibs( aRescuer.GetPrj() ), true );
 
 // At some point during V5 development, the LIB_ID delimiter character ':' was
 // replaced by '_' when writing the symbol cache library so we have to test for
 // the LIB_NICKNAME_LIB_SYMBOL_NAME case.
 if( !cache_match )
 {
 symbolName = symbol_id.GetLibNickname().wx_str() + wxT( "_" ) +
 symbol_id.GetLibItemName().wx_str();
 cache_match = findSymbol( symbolName, PROJECT_SCH::SchLibs( aRescuer.GetPrj() ), true );
 }
 
 // Get the library symbol from the symbol library table.
 lib_match = SchGetLibSymbol( symbol_id, PROJECT_SCH::SchSymbolLibTable( aRescuer.GetPrj() ) );
 
 if( !cache_match && !lib_match )
 continue;
 
 LIB_SYMBOL_SPTR lib_match_parent;
 
 // If it's a derive symbol, use the parent symbol to perform the pin test.
 if( lib_match && lib_match->IsAlias() )
 {
 lib_match_parent = lib_match->GetRootSymbol();
 
 if( !lib_match_parent )
 lib_match = nullptr;
 else
 lib_match = lib_match_parent.get();
 }
 
 // Test whether there is a conflict or if the symbol can only be found in the cache.
 if( LIB_ID::HasIllegalChars( symbol_id.GetLibItemName() ) == -1 )
 {
 if( cache_match && lib_match &&
 !cache_match->PinsConflictWith( *lib_match, true, true, true, true, false ) )
 {
 continue;
 }
 
 if( !cache_match && lib_match )
 continue;
 }
 
 // Fix illegal LIB_ID name characters.
 wxString new_name = EscapeString( symbol_id.GetLibItemName(), CTX_LIBID );
 
 // Differentiate symbol name in the rescue library by appending the original symbol
 // library table nickname to the symbol name to prevent name clashes in the rescue
 // library.
 wxString libNickname = GetRescueLibraryFileName( aRescuer.Schematic() ).GetName();
 
 LIB_ID new_id( libNickname, new_name + wxS( "-" ) + symbol_id.GetLibNickname().wx_str() );
 
 RESCUE_SYMBOL_LIB_TABLE_CANDIDATE candidate( symbol_id, new_id, cache_match, lib_match,
 eachSymbol->GetUnit(),
 eachSymbol->GetBodyStyle() );
 
 candidate_map[symbol_id] = candidate;
 }
 }
 
 // Now, dump the map into aCandidates
 for( const candidate_map_t::value_type& each_pair : candidate_map )
 {
 aCandidates.push_back( new RESCUE_SYMBOL_LIB_TABLE_CANDIDATE( each_pair.second ) );
 }
}
 
 
wxString RESCUE_SYMBOL_LIB_TABLE_CANDIDATE::GetActionDescription() const
{
 wxString action;
 
 if( !m_cache_candidate && !m_lib_candidate )
 {
 action.Printf( _( "Cannot rescue symbol %s which is not available in any library or "
 "the cache." ),
 UnescapeString( m_requested_id.GetLibItemName().wx_str() ) );
 }
 else if( m_cache_candidate && !m_lib_candidate )
 {
 action.Printf( _( "Rescue symbol %s found only in cache library to %s." ),
 UnescapeString( m_requested_id.Format().wx_str() ),
 UnescapeString( m_new_id.Format().wx_str() ) );
 }
 else
 {
 action.Printf( _( "Rescue modified symbol %s to %s" ),
 UnescapeString( m_requested_id.Format().wx_str() ),
 UnescapeString( m_new_id.Format().wx_str() ) );
 }
 
 return action;
}
 
 
bool RESCUE_SYMBOL_LIB_TABLE_CANDIDATE::PerformAction( RESCUER* aRescuer )
{
 LIB_SYMBOL* tmp = ( m_cache_candidate ) ? m_cache_candidate : m_lib_candidate;
 
 wxCHECK_MSG( tmp, false, wxS( "Both cache and library symbols undefined." ) );
 
 std::unique_ptr<LIB_SYMBOL> new_symbol = tmp->Flatten();
 new_symbol->SetLibId( m_new_id );
 new_symbol->SetName( m_new_id.GetLibItemName() );
 aRescuer->AddSymbol( new_symbol.get() );
 
 for( SCH_SYMBOL* eachSymbol : *aRescuer->GetSymbols() )
 {
 if( eachSymbol->GetLibId() != m_requested_id )
 continue;
 
 eachSymbol->SetLibId( m_new_id );
 eachSymbol->ClearFlags();
 aRescuer->LogRescue( eachSymbol, m_requested_id.Format(), m_new_id.Format() );
 }
 
 return true;
}
 
 
RESCUER::RESCUER( PROJECT& aProject, SCHEMATIC* aSchematic, SCH_SHEET_PATH* aCurrentSheet,
 EDA_DRAW_PANEL_GAL::GAL_TYPE aGalBackEndType )
{
 m_schematic = aSchematic ? aSchematic : aCurrentSheet->LastScreen()->Schematic();
 
 wxASSERT( m_schematic );
 
 if( m_schematic )
 getSymbols( m_schematic, m_symbols );
 
 m_prj = &aProject;
 m_currentSheet = aCurrentSheet;
 m_galBackEndType = aGalBackEndType;
}
 
 
void RESCUER::LogRescue( SCH_SYMBOL* aSymbol, const wxString &aOldName,
 const wxString &aNewName )
{
 RESCUE_LOG logitem;
 logitem.symbol = aSymbol;
 logitem.old_name = aOldName;
 logitem.new_name = aNewName;
 m_rescue_log.push_back( logitem );
}
 
 
bool RESCUER::DoRescues()
{
 for( RESCUE_CANDIDATE* each_candidate : m_chosen_candidates )
 {
 if( ! each_candidate->PerformAction( this ) )
 return false;
 }
 
 return true;
}
 
 
void RESCUER::UndoRescues()
{
 for( RESCUE_LOG& each_logitem : m_rescue_log )
 {
 LIB_ID libId;
 
 libId.SetLibItemName( each_logitem.old_name );
 each_logitem.symbol->SetLibId( libId );
 each_logitem.symbol->ClearFlags();
 }
}
 
 
bool RESCUER::RescueProject( wxWindow* aParent, RESCUER& aRescuer, bool aRunningOnDemand )
{
 aRescuer.FindCandidates();
 
 if( !aRescuer.GetCandidateCount() )
 {
 if( aRunningOnDemand )
 {
 wxMessageDialog dlg( aParent, _( "This project has nothing to rescue." ),
 _( "Project Rescue Helper" ) );
 dlg.ShowModal();
 }
 
 return true;
 }
 
 aRescuer.RemoveDuplicates();
 aRescuer.InvokeDialog( aParent, !aRunningOnDemand );
 
 // If no symbols were rescued, let the user know what's going on. He might
 // have clicked cancel by mistake, and should have some indication of that.
 if( !aRescuer.GetChosenCandidateCount() )
 {
 wxMessageDialog dlg( aParent, _( "No symbols were rescued." ),
 _( "Project Rescue Helper" ) );
 dlg.ShowModal();
 
 // Set the modified flag even on Cancel. Many users seem to instinctively want to Save at
 // this point, due to the reloading of the symbols, so we'll make the save button active.
 return true;
 }
 
 aRescuer.OpenRescueLibrary();
 
 if( !aRescuer.DoRescues() )
 {
 aRescuer.UndoRescues();
 return false;
 }
 
 aRescuer.WriteRescueLibrary( aParent );
 
 return true;
}
 
 
void RESCUER::RemoveDuplicates()
{
 std::vector<wxString> names_seen;
 
 for( boost::ptr_vector<RESCUE_CANDIDATE>::iterator it = m_all_candidates.begin();
 it != m_all_candidates.end(); )
 {
 bool seen_already = false;
 
 for( wxString& name_seen : names_seen )
 {
 if( name_seen == it->GetRequestedName() )
 {
 seen_already = true;
 break;
 }
 }
 
 if( seen_already )
 {
 it = m_all_candidates.erase( it );
 }
 else
 {
 names_seen.push_back( it->GetRequestedName() );
 ++it;
 }
 }
}
 
 
void LEGACY_RESCUER::FindCandidates()
{
 RESCUE_CASE_CANDIDATE::FindRescues( *this, m_all_candidates );
 RESCUE_CACHE_CANDIDATE::FindRescues( *this, m_all_candidates );
}
 
 
void LEGACY_RESCUER::InvokeDialog( wxWindow* aParent, bool aAskShowAgain )
{
 InvokeDialogRescueEach( aParent, static_cast< RESCUER& >( *this ), m_currentSheet,
 m_galBackEndType, aAskShowAgain );
}
 
 
void LEGACY_RESCUER::OpenRescueLibrary()
{
 wxFileName fn = GetRescueLibraryFileName( m_schematic );
 
 std::unique_ptr<SYMBOL_LIB> rescue_lib = std::make_unique<SYMBOL_LIB>( SCH_LIB_TYPE::LT_EESCHEMA,
 fn.GetFullPath() );
 
 m_rescue_lib = std::move( rescue_lib );
 m_rescue_lib->EnableBuffering();
 
 // If a rescue library already exists copy the contents of that library so we do not
 // lose any previous rescues.
 SYMBOL_LIB* rescueLib = PROJECT_SCH::SchLibs( m_prj )->FindLibrary( fn.GetName() );
 
 if( rescueLib )
 {
 // For items in the rescue library, aliases are the root symbol.
 std::vector< LIB_SYMBOL* > symbols;
 
 rescueLib->GetSymbols( symbols );
 
 for( LIB_SYMBOL* symbol : symbols )
 {
 // The LIB_SYMBOL copy constructor flattens derived symbols (formerly known as aliases).
 m_rescue_lib->AddSymbol( new LIB_SYMBOL( *symbol, m_rescue_lib.get() ) );
 }
 }
}
 
 
bool LEGACY_RESCUER::WriteRescueLibrary( wxWindow *aParent )
{
 try
 {
 m_rescue_lib->Save( false );
 }
 catch( ... /* IO_ERROR ioe */ )
 {
 wxString msg;
 
 msg.Printf( _( "Failed to create symbol library file '%s'." ),
 m_rescue_lib->GetFullFileName() );
 DisplayError( aParent, msg );
 return false;
 }
 
 wxArrayString libNames;
 wxString libPaths;
 
 wxString libName = m_rescue_lib->GetName();
 SYMBOL_LIBS *libs = dynamic_cast<SYMBOL_LIBS*>( m_prj->GetElem( PROJECT::ELEM_SCH_SYMBOL_LIBS ) );
 
 if( !libs )
 {
 libs = new SYMBOL_LIBS();
 m_prj->SetElem( PROJECT::ELEM_SCH_SYMBOL_LIBS, libs );
 }
 
 try
 {
 SYMBOL_LIBS::GetLibNamesAndPaths( m_prj, &libPaths, &libNames );
 
 // Make sure the library is not already in the list
 while( libNames.Index( libName ) != wxNOT_FOUND )
 libNames.Remove( libName );
 
 // Add the library to the top of the list and save.
 libNames.Insert( libName, 0 );
 SYMBOL_LIBS::SetLibNamesAndPaths( m_prj, libPaths, libNames );
 }
 catch( const IO_ERROR& )
 {
 // Could not get or save the current libraries.
 return false;
 }
 
 // Save the old libraries in case there is a problem after clear(). We'll
 // put them back in.
 boost::ptr_vector<SYMBOL_LIB> libsSave;
 libsSave.transfer( libsSave.end(), libs->begin(), libs->end(), *libs );
 
 m_prj->SetElem( PROJECT::ELEM_SCH_SYMBOL_LIBS, nullptr );
 
 libs = new SYMBOL_LIBS();
 
 try
 {
 libs->LoadAllLibraries( m_prj );
 }
 catch( const PARSE_ERROR& )
 {
 // Some libraries were not found. There's no point in showing the error,
 // because it was already shown. Just don't do anything.
 }
 catch( const IO_ERROR& )
 {
 // Restore the old list
 libs->clear();
 libs->transfer( libs->end(), libsSave.begin(), libsSave.end(), libsSave );
 return false;
 }
 
 m_prj->SetElem( PROJECT::ELEM_SCH_SYMBOL_LIBS, libs );
 
 // Update the schematic symbol library links since the library list has changed.
 SCH_SCREENS schematic( m_schematic->Root() );
 schematic.UpdateSymbolLinks();
 return true;
}
 
 
void LEGACY_RESCUER::AddSymbol( LIB_SYMBOL* aNewSymbol )
{
 wxCHECK_RET( aNewSymbol, wxS( "Invalid LIB_SYMBOL pointer." ) );
 
 aNewSymbol->SetLib( m_rescue_lib.get() );
 m_rescue_lib->AddSymbol( aNewSymbol );
}
 
 
SYMBOL_LIB_TABLE_RESCUER::SYMBOL_LIB_TABLE_RESCUER( PROJECT& aProject, SCHEMATIC* aSchematic,
 SCH_SHEET_PATH* aCurrentSheet,
 EDA_DRAW_PANEL_GAL::GAL_TYPE aGalBackEndType ) :
 RESCUER( aProject, aSchematic, aCurrentSheet, aGalBackEndType )
{
 m_properties = std::make_unique<STRING_UTF8_MAP>();
}
 
 
void SYMBOL_LIB_TABLE_RESCUER::FindCandidates()
{
 RESCUE_SYMBOL_LIB_TABLE_CANDIDATE::FindRescues( *this, m_all_candidates );
}
 
 
void SYMBOL_LIB_TABLE_RESCUER::InvokeDialog( wxWindow* aParent, bool aAskShowAgain )
{
 InvokeDialogRescueEach( aParent, static_cast< RESCUER& >( *this ), m_currentSheet,
 m_galBackEndType, aAskShowAgain );
}
 
 
void SYMBOL_LIB_TABLE_RESCUER::OpenRescueLibrary()
{
 (*m_properties)[ SCH_IO_KICAD_LEGACY::PropBuffering ] = "";
 
 wxFileName fn = GetRescueLibraryFileName( m_schematic );
 
 SYMBOL_LIB_TABLE_ROW* row = PROJECT_SCH::SchSymbolLibTable( m_prj )->FindRow( fn.GetName() );
 
 // If a rescue library already exists copy the contents of that library so we do not
 // lose any previous rescues.
 if( row )
 {
 if( SCH_IO_MGR::EnumFromStr( row->GetType() ) == SCH_IO_MGR::SCH_KICAD )
 fn.SetExt( FILEEXT::KiCadSymbolLibFileExtension );
 
 std::vector<LIB_SYMBOL*> symbols;
 
 try
 {
 PROJECT_SCH::SchSymbolLibTable( m_prj )->LoadSymbolLib( symbols, fn.GetName() );
 }
 catch( ... /* IO_ERROR */ )
 {
 return;
 }
 
 for( LIB_SYMBOL* symbol : symbols )
 m_rescueLibSymbols.emplace_back( std::make_unique<LIB_SYMBOL>( *symbol ) );
 }
}
 
 
bool SYMBOL_LIB_TABLE_RESCUER::WriteRescueLibrary( wxWindow *aParent )
{
 wxString msg;
 wxFileName fn = GetRescueLibraryFileName( m_schematic );
 SYMBOL_LIB_TABLE_ROW* row = PROJECT_SCH::SchSymbolLibTable( m_prj )->FindRow( fn.GetName() );
 
 fn.SetExt( FILEEXT::KiCadSymbolLibFileExtension );
 
 try
 {
 IO_RELEASER<SCH_IO> pi( SCH_IO_MGR::FindPlugin( SCH_IO_MGR::SCH_KICAD ) );
 
 for( const std::unique_ptr<LIB_SYMBOL>& symbol : m_rescueLibSymbols )
 pi->SaveSymbol( fn.GetFullPath(), new LIB_SYMBOL( *symbol.get() ), m_properties.get() );
 
 pi->SaveLibrary( fn.GetFullPath() );
 }
 catch( const IO_ERROR& ioe )
 {
 msg.Printf( _( "Failed to save rescue library %s." ), fn.GetFullPath() );
 DisplayErrorMessage( aParent, msg, ioe.What() );
 return false;
 }
 
 // If the rescue library already exists in the symbol library table no need save it to add
 // it to the table.
 if( !row || ( SCH_IO_MGR::EnumFromStr( row->GetType() ) == SCH_IO_MGR::SCH_LEGACY ) )
 {
 wxString uri = wxS( "${KIPRJMOD}/" ) + fn.GetFullName();
 wxString libNickname = fn.GetName();
 
 row = new SYMBOL_LIB_TABLE_ROW( libNickname, uri, wxT( "KiCad" ) );
 PROJECT_SCH::SchSymbolLibTable( m_prj )->InsertRow( row, true );
 
 fn = wxFileName( m_prj->GetProjectPath(), SYMBOL_LIB_TABLE::GetSymbolLibTableFileName() );
 
 try
 {
 PROJECT_SCH::SchSymbolLibTable( m_prj )->Save( fn.GetFullPath() );
 }
 catch( const IO_ERROR& ioe )
 {
 msg.Printf( _( "Error occurred saving project specific symbol library table." ) );
 DisplayErrorMessage( aParent, msg, ioe.What() );
 return false;
 }
 }
 
 m_prj->SetElem( PROJECT::ELEM_SYMBOL_LIB_TABLE, nullptr );
 
 // This can only happen if the symbol library table file was corrupted on write.
 if( !PROJECT_SCH::SchSymbolLibTable( m_prj ) )
 return false;
 
 // Update the schematic symbol library links since the library list has changed.
 SCH_SCREENS schematic( m_schematic->Root() );
 schematic.UpdateSymbolLinks();
 return true;
}
 
 
void SYMBOL_LIB_TABLE_RESCUER::AddSymbol( LIB_SYMBOL* aNewSymbol )
{
 wxCHECK_RET( aNewSymbol, wxS( "Invalid LIB_SYMBOL pointer." ) );
 
 m_rescueLibSymbols.emplace_back( std::make_unique<LIB_SYMBOL>( *aNewSymbol ) );
}