eeschema: Prevent invalid '0' element in components

In the component, an m_unit/m_convert element is 1-indexed as opposed to
the library where they are 0-indexed.  The 0-index in the library is
reserved for those elements that are shared across all conversion/unit
whereas it is invalid for the component.

Fixes: lp:1824764
* https://bugs.launchpad.net/kicad/+bug/1824764

eeschema/class_libentry.cpp

@@ -986,7 +986,7 @@ bool LIB_PART::HasConversion() const
 {
     for( const LIB_ITEM& item : m_drawings )
     {
-        if( item.m_Convert > 1 )
+        if( item.m_Convert > LIB_ITEM::LIB_CONVERT::BASE )
             return true;
     }
 

eeschema/dialogs/dialog_edit_component_in_schematic.cpp

@@ -175,7 +175,7 @@ bool DIALOG_EDIT_COMPONENT_IN_SCHEMATIC::TransferDataToWindow()
 
     if( m_part != nullptr && m_part->HasConversion() )
     {
-        if( m_cmp->GetConvert() > 1 )
+        if( m_cmp->GetConvert() > LIB_ITEM::LIB_CONVERT::BASE )
             m_cbAlternateSymbol->SetValue( true );
     }
     else
@@ -252,7 +252,7 @@ void DIALOG_EDIT_COMPONENT_IN_SCHEMATIC::OnBrowseLibrary( wxCommandEvent& event
             for( int ii = 1; ii <= entry->GetUnitCount(); ii++ )
                 m_unitChoice->Append( LIB_PART::SubReference( ii, false ) );
 
-            if( unit < 0 || unit >= m_unitChoice->GetCount() )
+            if( unit < 0 || static_cast<unsigned>( unit )>= m_unitChoice->GetCount() )
                 unit = 0;
 
             m_unitChoice->SetSelection( unit );
@@ -405,15 +405,15 @@ bool DIALOG_EDIT_COMPONENT_IN_SCHEMATIC::TransferDataFromWindow()
     m_cmp->SetLibId( id, Prj().SchSymbolLibTable(), Prj().SchLibs()->GetCacheLibrary() );
 
     // For symbols with multiple shapes (De Morgan representation) Set the selected shape:
-    int conversion = m_cbAlternateSymbol->IsEnabled()
-                        ? m_cbAlternateSymbol->GetValue()
-                        : 0;
-    m_cmp->SetConvert( conversion );
+    if( m_cbAlternateSymbol->IsEnabled() && m_cbAlternateSymbol->GetValue() )
+        m_cmp->SetConvert( LIB_ITEM::LIB_CONVERT::DEMORGAN );
+    else
+        m_cmp->SetConvert( LIB_ITEM::LIB_CONVERT::BASE );
 
     //Set the part selection in multiple part per package
     int unit_selection = m_unitChoice->IsEnabled()
                             ? m_unitChoice->GetSelection() + 1
-                            : 0;
+                            : 1;
     m_cmp->SetUnitSelection( &GetParent()->GetCurrentSheet(), unit_selection );
     m_cmp->SetUnit( unit_selection );
 

eeschema/getpart.cpp

@@ -372,14 +372,14 @@ void SCH_EDIT_FRAME::ConvertPart( SCH_COMPONENT* aComponent )
 
         aComponent->SetConvert( aComponent->GetConvert() + 1 );
 
-        // ensure m_Convert = 0, 1 or 2
-        // 0 and 1 = shape 1 = not converted
+        // ensure m_Convert = 1 or 2
+        // 1 = shape 1 = not converted
         // 2 = shape 2 = first converted shape
         // > 2 is not used but could be used for more shapes
         // like multiple shapes for a programmable component
         // When m_Convert = val max, return to the first shape
-        if( aComponent->GetConvert() > 2 )
-            aComponent->SetConvert( 1 );
+        if( aComponent->GetConvert() > LIB_ITEM::LIB_CONVERT::DEMORGAN )
+            aComponent->SetConvert( LIB_ITEM::LIB_CONVERT::BASE );
 
         // The alternate symbol may cause a change in the connection status so test the
         // connections so the connection indicators are drawn correctly.

eeschema/lib_draw_item.cpp

@@ -68,11 +68,9 @@ void LIB_ITEM::GetMsgPanelInfo( EDA_UNITS_T aUnits, MSG_PANEL_ITEMS& aList )
 
     aList.push_back( MSG_PANEL_ITEM( _( "Unit" ), msg, BROWN ) );
 
-    if( m_Convert == 0 )
-        msg = _( "All" );
-    else if( m_Convert == 1 )
+    if( m_Convert == LIB_ITEM::LIB_CONVERT::BASE )
         msg = _( "no" );
-    else if( m_Convert == 2 )
+    else if( m_Convert == LIB_ITEM::LIB_CONVERT::DEMORGAN )
         msg = _( "yes" );
     else
         msg = wxT( "?" );

eeschema/lib_draw_item.h

@@ -92,7 +92,6 @@ class LIB_ITEM : public EDA_ITEM
      * @param aColor Draw color
      */
     virtual void drawEditGraphics( EDA_RECT* aClipBox, wxDC* aDC, COLOR4D aColor ) {}
-
     
     friend class LIB_PART;
 
@@ -134,6 +133,10 @@ public:
 
     virtual ~LIB_ITEM() { }
 
+
+    // Define the enums for basic
+    enum LIB_CONVERT : int  { BASE = 1, DEMORGAN = 2 };
+
     /**
      * Provide a user-consumable name of the object type.  Perform localization when
      * called so that run-time language selection works.

eeschema/sch_component.cpp

@@ -193,8 +193,8 @@ SCH_COMPONENT::SCH_COMPONENT( const SCH_COMPONENT& aComponent ) :
 void SCH_COMPONENT::Init( const wxPoint& pos )
 {
     m_Pos     = pos;
-    m_unit    = 0;  // In multi unit chip - which unit to draw.
-    m_convert = 0;  // De Morgan Handling
+    m_unit    = 1;  // In multi unit chip - which unit to draw.
+    m_convert = LIB_ITEM::LIB_CONVERT::BASE;  // De Morgan Handling
 
     // The rotation/mirror transformation matrix. pos normal
     m_transform = TRANSFORM();

eeschema/viewlib_frame.cpp

@@ -228,7 +228,7 @@ LIB_VIEW_FRAME::~LIB_VIEW_FRAME()
 void LIB_VIEW_FRAME::SetUnitAndConvert( int aUnit, int aConvert )
 {
     m_unit = aUnit > 0 ? aUnit : 1;
-    m_convert = aConvert > 0 ? aConvert : 1;
+    m_convert = aConvert > 0 ? aConvert : LIB_ITEM::LIB_CONVERT::BASE;
     m_selection_changed = false;
 
     // Update canvas
@@ -546,7 +546,7 @@ bool LIB_VIEW_FRAME::ReCreateListLib()
         m_libraryName = libs[0];
         m_entryName = wxEmptyString;
         m_unit = 1;
-        m_convert = 1;
+        m_convert = LIB_ITEM::LIB_CONVERT::BASE;
     }
 
     bool cmp_changed = ReCreateListCmp();
@@ -577,7 +577,7 @@ bool LIB_VIEW_FRAME::ReCreateListCmp()
     {
         m_libraryName = wxEmptyString;
         m_entryName = wxEmptyString;
-        m_convert = 1;
+        m_convert = LIB_ITEM::LIB_CONVERT::BASE;
         m_unit    = 1;
         return true;
     }
@@ -591,7 +591,7 @@ bool LIB_VIEW_FRAME::ReCreateListCmp()
     {
         // Select the first library entry when the previous entry name does not exist in
         // the current library.
-        m_convert   = 1;
+        m_convert   = LIB_ITEM::LIB_CONVERT::BASE;
         m_unit      = 1;
         index       = 0;
         changed     = true;
@@ -665,7 +665,7 @@ void LIB_VIEW_FRAME::SetSelectedComponent( const wxString& aComponentName )
         if( m_selection_changed )
         {
             m_unit = 1;
-            m_convert = 1;
+            m_convert = LIB_ITEM::LIB_CONVERT::BASE;
             m_selection_changed = false;
         }
 

eeschema/viewlibs.cpp

@@ -144,11 +144,11 @@ void LIB_VIEW_FRAME::onSelectSymbolBodyStyle( wxCommandEvent& aEvent )
     {
     default:
     case ID_LIBVIEW_DE_MORGAN_NORMAL_BUTT:
-        m_convert = 1;
+        m_convert = LIB_ITEM::LIB_CONVERT::BASE;
         break;
 
     case ID_LIBVIEW_DE_MORGAN_CONVERT_BUTT:
-        m_convert = 2;
+        m_convert = LIB_ITEM::LIB_CONVERT::DEMORGAN;
         break;
     }