kicad/eeschema/sch_plugins/sch_lib_plugin_cache.cpp

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/*
* This program source code file is part of KiCad, a free EDA CAD application.
*
* Copyright (C) 2022 KiCad Developers, see AUTHORS.txt for contributors.
*
* @author Wayne Stambaugh <stambaughw@gmail.com>
*
* 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, see <http://www.gnu.org/licenses/>.
*/
#include "sch_lib_plugin_cache.h"
#include <lib_symbol.h>
#include <wx_filename.h>
SCH_LIB_PLUGIN_CACHE::SCH_LIB_PLUGIN_CACHE( const wxString& aFullPathAndFileName ) :
m_modHash( 1 ),
m_fileName( aFullPathAndFileName ),
m_libFileName( aFullPathAndFileName ),
m_isWritable( true ),
m_isModified( false )
{
m_libType = SCH_LIB_TYPE::LT_EESCHEMA;
}
SCH_LIB_PLUGIN_CACHE::~SCH_LIB_PLUGIN_CACHE()
{
// When the cache is destroyed, all of the alias objects on the heap should be deleted.
for( auto& symbol : m_symbols )
delete symbol.second;
m_symbols.clear();
}
void SCH_LIB_PLUGIN_CACHE::Save( const std::optional<bool>& aOpt )
{
wxCHECK( false, /* void */ );
}
wxFileName SCH_LIB_PLUGIN_CACHE::GetRealFile() const
{
wxFileName fn( m_libFileName );
// If m_libFileName is a symlink follow it to the real source file
WX_FILENAME::ResolvePossibleSymlinks( fn );
return fn;
}
wxDateTime SCH_LIB_PLUGIN_CACHE::GetLibModificationTime()
{
wxFileName fn = GetRealFile();
// update the writable flag while we have a wxFileName, in a network this
// is possibly quite dynamic anyway.
m_isWritable = fn.IsFileWritable();
return fn.GetModificationTime();
}
bool SCH_LIB_PLUGIN_CACHE::IsFile( const wxString& aFullPathAndFileName ) const
{
return m_fileName == aFullPathAndFileName;
}
bool SCH_LIB_PLUGIN_CACHE::IsFileChanged() const
{
wxFileName fn = GetRealFile();
if( m_fileModTime.IsValid() && fn.IsOk() && fn.FileExists() )
return fn.GetModificationTime() != m_fileModTime;
return false;
}
LIB_SYMBOL* SCH_LIB_PLUGIN_CACHE::removeSymbol( LIB_SYMBOL* aSymbol )
{
wxCHECK_MSG( aSymbol != nullptr, nullptr, "NULL pointer cannot be removed from library." );
LIB_SYMBOL* firstChild = nullptr;
LIB_SYMBOL_MAP::iterator it = m_symbols.find( aSymbol->GetName() );
if( it == m_symbols.end() )
return nullptr;
// If the entry pointer doesn't match the name it is mapped to in the library, we
// have done something terribly wrong.
wxCHECK_MSG( *it->second == aSymbol, nullptr,
"Pointer mismatch while attempting to remove alias entry <" + aSymbol->GetName() +
"> from library cache <" + m_libFileName.GetName() + ">." );
// If the symbol is a root symbol used by other symbols find the first alias that uses
// the root symbol and make it the new root.
if( aSymbol->IsRoot() )
{
for( auto entry : m_symbols )
{
if( entry.second->IsAlias()
&& entry.second->GetParent().lock() == aSymbol->SharedPtr() )
{
firstChild = entry.second;
break;
}
}
if( firstChild )
{
for( LIB_ITEM& drawItem : aSymbol->GetDrawItems() )
{
if( drawItem.Type() == LIB_FIELD_T )
{
LIB_FIELD& field = static_cast<LIB_FIELD&>( drawItem );
if( firstChild->FindField( field.GetCanonicalName() ) )
continue;
}
LIB_ITEM* newItem = (LIB_ITEM*) drawItem.Clone();
drawItem.SetParent( firstChild );
firstChild->AddDrawItem( newItem );
}
// Reparent the remaining aliases.
for( auto entry : m_symbols )
{
if( entry.second->IsAlias()
&& entry.second->GetParent().lock() == aSymbol->SharedPtr() )
entry.second->SetParent( firstChild );
}
}
}
m_symbols.erase( it );
delete aSymbol;
m_isModified = true;
IncrementModifyHash();
return firstChild;
}
void SCH_LIB_PLUGIN_CACHE::AddSymbol( const LIB_SYMBOL* aSymbol )
{
// aSymbol is cloned in SYMBOL_LIB::AddSymbol(). The cache takes ownership of aSymbol.
wxString name = aSymbol->GetName();
LIB_SYMBOL_MAP::iterator it = m_symbols.find( name );
if( it != m_symbols.end() )
{
removeSymbol( it->second );
}
m_symbols[ name ] = const_cast< LIB_SYMBOL* >( aSymbol );
m_isModified = true;
IncrementModifyHash();
}