Symbol editor: inheritance symbol editing bug fixes.

There is no need to create a new root symbol and re-parent all derived
symbols when renaming a root symbol.  Just rename the buffered root
symbol.

Test for duplicate symbol names when validating the properties dialog
information to prevent broken symbol pointers.

Fix a field drawing bug when editing derived symbols.

Fix bug to insure duplicate symbol names cannot exist in a library.

Fixes kicad/code/kicad#3654

Fixes kicad/code/kicad#3672

eeschema/dialogs/dialog_edit_component_in_lib.cpp

@@ -289,11 +289,28 @@ bool DIALOG_EDIT_COMPONENT_IN_LIBRARY::TransferDataFromWindow()
 
     // We need to keep the name and the value the same at the moment!
     wxString   newName = m_fields->at( VALUE ).GetText();
+    wxString   oldName = m_libEntry->GetName();
+
+    if( oldName != newName )
+    {
+        wxString libName = m_Parent->GetCurLib();
+
+        if( m_Parent->GetLibManager().PartExists( newName, libName ) )
+        {
+            wxString msg;
+
+            msg.Printf( _( "The name '%s' conflicts with an existing entry in the library '%s'." ),
+                        newName, libName );
+            DisplayErrorMessage( this, msg );
+            return false;
+        }
 
-    if( m_libEntry->GetName() != newName )
         m_Parent->SaveCopyInUndoList( m_libEntry, UR_LIB_RENAME );
+    }
     else
+    {
         m_Parent->SaveCopyInUndoList( m_libEntry );
+    }
 
     // The Y axis for components in lib is from bottom to top while the screen axis is top
     // to bottom: we must change the y coord sign when writing back to the library
@@ -338,6 +355,11 @@ bool DIALOG_EDIT_COMPONENT_IN_LIBRARY::TransferDataFromWindow()
 
     m_libEntry->SetFootprintFilters( m_FootprintFilterListBox->GetStrings() );
 
+    if( oldName != newName )
+        m_Parent->UpdateAfterSymbolProperties( &oldName );
+    else
+        m_Parent->RebuildView();
+
     return true;
 }
 

eeschema/libedit/lib_edit_frame.h

@@ -236,7 +236,7 @@ public:
 
     void OnUpdatePartNumber( wxUpdateUIEvent& event );
 
-    void UpdateAfterSymbolProperties( wxString* aOldName, wxArrayString* aOldAliases );
+    void UpdateAfterSymbolProperties( wxString* aOldName = nullptr );
     void RebuildSymbolUnitsList();
 
     void OnCloseWindow( wxCloseEvent& Event );

eeschema/libedit/lib_manager.cpp

@@ -426,49 +426,16 @@ bool LIB_MANAGER::UpdatePart( LIB_PART* aPart, const wxString& aLibrary )
 bool LIB_MANAGER::UpdatePartAfterRename( LIB_PART* aPart, const wxString& aOldName,
                                          const wxString& aLibrary )
 {
-    // This is essentially a delete/update.
-
     LIB_BUFFER& libBuf = getLibraryBuffer( aLibrary );
     auto partBuf = libBuf.GetBuffer( aOldName );
-    wxCHECK( partBuf, false );
-
-    // Save the original record so it is transferred to the new buffer
-    std::unique_ptr<LIB_PART> original( new LIB_PART( *partBuf->GetOriginal() ) );
-
-    // Save the screen object, so it is transferred to the new buffer
-    std::unique_ptr<SCH_SCREEN> screen = partBuf->RemoveScreen();
-
-    if( partBuf->GetPart()->IsRoot() && libBuf.HasDerivedSymbols( aOldName ) )
-    {
-        // Reparent derived symbols.
-        for( auto entry : libBuf.GetBuffers() )
-        {
-            if( entry->GetPart()->IsRoot() )
-                continue;
-
-            if( entry->GetPart()->GetParent().lock() == original->SharedPtr() )
-            {
-                if( !libBuf.DeleteBuffer( entry ) )
-                    return false;
-
-                LIB_PART* reparentedPart = new LIB_PART( *entry->GetPart() );
-                reparentedPart->SetParent( original.get() );
-                libBuf.CreateBuffer( reparentedPart, new SCH_SCREEN( &m_frame.Kiway() ) );
-            }
-        }
-    }
 
-    if( !libBuf.DeleteBuffer( partBuf ) )
-        return false;
+    wxCHECK( partBuf, false );
 
-    if( !UpdatePart( aPart, aLibrary ) )
-        return false;
+    LIB_PART* bufferedPart = const_cast< LIB_PART* >( partBuf->GetPart() );
 
-    partBuf = libBuf.GetBuffer( aPart->GetName() );
-    partBuf->SetScreen( std::move( screen ) );
-    wxCHECK( partBuf, false );
-    partBuf->SetOriginal( original.release() ); // part buffer takes ownership of pointer
+    wxCHECK( bufferedPart, false );
 
+    bufferedPart->SetName( aPart->GetName() );
     SetCurrentPart( aPart->GetName() );
     m_frame.SyncLibraries( false );
 

eeschema/libedit/libedit.cpp

@@ -505,7 +505,7 @@ void LIB_EDIT_FRAME::savePartAs()
 }
 
 
-void LIB_EDIT_FRAME::UpdateAfterSymbolProperties( wxString* aOldName, wxArrayString* aOldAliases )
+void LIB_EDIT_FRAME::UpdateAfterSymbolProperties( wxString* aOldName )
 {
     wxCHECK( m_my_part, /* void */ );
 
@@ -680,9 +680,15 @@ void LIB_EDIT_FRAME::fixDuplicateAliases( LIB_PART* aPart, const wxString& aLibr
 {
     wxCHECK( aPart, /* void */ );
 
+    int      i;
     wxString newName;
 
-    newName.Printf( "%s_copy", aPart->GetName() );
+    // Append a number to the name until the name is unique in the library.
+    do
+    {
+        newName.Printf( "%s_%d", aPart->GetName(), i );
+        i++;
+    } while( m_libMgr->PartExists( newName, aLibrary ) );
 
     aPart->SetName( newName );
 }

eeschema/tools/lib_edit_tool.cpp

@@ -504,7 +504,7 @@ void LIB_EDIT_TOOL::editFieldProperties( LIB_FIELD* aField )
     if( renamed )
     {
         parent->SetName( newFieldValue );
-        m_frame->UpdateAfterSymbolProperties( &oldFieldValue, nullptr );
+        m_frame->UpdateAfterSymbolProperties( &oldFieldValue );
     }
     else
     {