CADSTAR PCB: Parse Teardrops

Todo: We need to figure out how we will load teardrops. For now
just drop them on import.

Fixes https://gitlab.com/kicad/code/kicad/-/issues/12349

pcbnew/plugins/cadstar/cadstar_pcb_archive_loader.cpp

@@ -2455,6 +2455,15 @@ void CADSTAR_PCB_ARCHIVE_LOADER::loadNetTracks( const NET_ID&         aCadstarNe
         shape->SetLocked( v.Fixed );
         shapes.push_back( shape );
         prevEnd = v.Vertex.End;
+
+        if( !m_doneTearDropWarning && ( v.TeardropAtEnd || v.TeardropAtStart ) )
+        {
+            // TODO: load teardrops
+            wxLogError( _( "The CADSTAR design contains teardrops. This importer does not yet "
+                           "support them, so the teardrops in the design have been ignored." ) );
+
+            m_doneTearDropWarning = true;
+        }
     }
 
     NETINFO_ITEM*           net = getKiCadNet( aCadstarNetID );

pcbnew/plugins/cadstar/cadstar_pcb_archive_loader.h

@@ -54,6 +54,7 @@ public:
         m_doneCopperWarning       = false;
         m_doneSpacingClassWarning = false;
         m_doneNetClassWarning     = false;
+        m_doneTearDropWarning     = false;
         m_numNets                 = 0;
         m_numCopperLayers         = 0 ;
         m_progressReporter        = aProgressReporter;
@@ -134,6 +135,7 @@ private:
                                                          ///< multiple duplicate warnings
     bool m_doneNetClassWarning;                          ///< Used by getKiCadNet() to avoid
                                                          ///< multiple duplicate warnings
+    bool m_doneTearDropWarning;
     int m_numNets;                                       ///< Number of nets loaded so far
     int m_numCopperLayers;                               ///< Number of layers in the design
 

pcbnew/plugins/cadstar/cadstar_pcb_archive_parser.cpp

@@ -2027,20 +2027,42 @@ XNODE* CADSTAR_PCB_ARCHIVE_PARSER::NET_PCB::ROUTE_VERTEX::Parse( XNODE* aNode,
     wxASSERT( aNode->GetName() == wxT( "ROUTEWIDTH" ) );
 
     RouteWidth      = GetXmlAttributeIDLong( aNode, 0 );
+    XNODE* prevNode = aNode;
     XNODE* nextNode = aNode->GetNext();
 
-    if( nextNode->GetName() == wxT( "FIX" ) )
+    for( ; nextNode; nextNode = nextNode->GetNext() )
     {
-        Fixed    = true;
+        if( nextNode->GetName() == wxT( "FIX" ) )
-        nextNode = nextNode->GetNext();
+        {
+            Fixed = true;
+        }
+        else if( nextNode->GetName() == wxT( "TDROPATSTART" ) )
+        {
+            TeardropAtStart = true;
+            TeardropAtStartAngle = GetXmlAttributeIDLong( nextNode, 0 );
+        }
+        else if( nextNode->GetName() == wxT( "TDROPATEND" ) )
+        {
+            TeardropAtEnd = true;
+            TeardropAtEndAngle = GetXmlAttributeIDLong( nextNode, 0 );
+        }
+        else if( VERTEX::IsVertex( nextNode ) )
+        {
+            Vertex.Parse( nextNode, aContext );
+        }
+        else if( nextNode->GetName() == wxT( "ROUTEWIDTH" ) )
+        {
+            return prevNode;
+        }
+        else
+        {
+            THROW_UNKNOWN_NODE_IO_ERROR( nextNode->GetName(), wxT( "ROUTE" ) );
+        }
+
+        prevNode = nextNode;
     }
 
-    if( !VERTEX::IsVertex( nextNode ) )
+    return prevNode;
-        THROW_UNKNOWN_NODE_IO_ERROR( nextNode->GetName(), wxT( "ROUTE_VERTEX" ) );
-
-    Vertex.Parse( nextNode, aContext );
-
-    return nextNode;
 }
 
 
@@ -2068,6 +2090,8 @@ void CADSTAR_PCB_ARCHIVE_PARSER::NET_PCB::ROUTE::Parse( XNODE* aNode, PARSER_CON
             ROUTE_VERTEX rtVert;
             cNode = rtVert.Parse( cNode, aContext );
             RouteVertices.push_back( rtVert );
+
+            assert( cNode != nullptr );
         }
         else
         {

pcbnew/plugins/cadstar/cadstar_pcb_archive_parser.h

@@ -983,6 +983,10 @@ public:
                             ///< next node being a VERTEX (e.g. PT, CWARC, etc.)
         {
             long   RouteWidth;
+            bool   TeardropAtStart = false;
+            bool   TeardropAtEnd = false;
+            long   TeardropAtStartAngle = 0;
+            long   TeardropAtEndAngle = 0;
             bool   Fixed = false;
             VERTEX Vertex;