Store items changed by connectivity algorithm in undo list

Fixes: lp:1828442
* https://bugs.launchpad.net/kicad/+bug/1828442

pcbnew/board_commit.cpp

@@ -256,20 +256,49 @@ void BOARD_COMMIT::Push( const wxString& aMessage, bool aCreateUndoEntry, bool a
     if( itemsToDeselect.size() > 0 )
         m_toolMgr->RunAction( PCB_ACTIONS::unselectItems, true, &itemsToDeselect );
 
+    if ( !m_editModules )
+    {
+        size_t num_changes = m_changes.size();
+
+        auto panel = static_cast<PCB_DRAW_PANEL_GAL*>( frame->GetGalCanvas() );
+        connectivity->RecalculateRatsnest( this );
+        connectivity->ClearDynamicRatsnest();
+        panel->RedrawRatsnest();
+
+        if( m_changes.size() > num_changes )
+        {
+            for( size_t i = num_changes; i < m_changes.size(); ++i )
+            {
+                COMMIT_LINE& ent = m_changes[i];
+
+                // This should only be modifications from the connectivity algo
+                wxASSERT( ( ent.m_type & CHT_TYPE ) == CHT_MODIFY );
+
+                auto boardItem = static_cast<BOARD_ITEM*>( ent.m_item );
+
+                if( aCreateUndoEntry )
+                {
+                    ITEM_PICKER itemWrapper( boardItem, UR_CHANGED );
+                    wxASSERT( ent.m_copy );
+                    itemWrapper.SetLink( ent.m_copy );
+                    undoList.PushItem( itemWrapper );
+                }
+                else
+                {
+                    delete ent.m_copy;
+                }
+
+                view->Update( boardItem );
+            }
+        }
+    }
+
     if( !m_editModules && aCreateUndoEntry )
         frame->SaveCopyInUndoList( undoList, UR_UNSPECIFIED );
 
     if( TOOL_MANAGER* toolMgr = frame->GetToolManager() )
         toolMgr->PostEvent( { TC_MESSAGE, TA_MODEL_CHANGE, AS_GLOBAL } );
 
-    if ( !m_editModules )
-    {
-        auto panel = static_cast<PCB_DRAW_PANEL_GAL*>( frame->GetGalCanvas() );
-        connectivity->RecalculateRatsnest();
-        connectivity->ClearDynamicRatsnest();
-        panel->RedrawRatsnest();
-    }
-
     if( aSetDirtyBit )
         frame->OnModify();
 

pcbnew/connectivity/connectivity_algo.cpp

@@ -25,6 +25,7 @@
 #include <connectivity/connectivity_algo.h>
 #include <widgets/progress_reporter.h>
 #include <geometry/geometry_utils.h>
+#include <board_commit.h>
 
 #include <thread>
 #include <mutex>
@@ -449,7 +450,7 @@ void CN_CONNECTIVITY_ALGO::Build( const std::vector<BOARD_ITEM*>& aItems )
 }
 
 
-void CN_CONNECTIVITY_ALGO::propagateConnections()
+void CN_CONNECTIVITY_ALGO::propagateConnections( BOARD_COMMIT* aCommit )
 {
     for( const auto& cluster : m_connClusters )
     {
@@ -476,6 +477,9 @@ void CN_CONNECTIVITY_ALGO::propagateConnections()
                         MarkNetAsDirty( item->Parent()->GetNetCode() );
                         MarkNetAsDirty( cluster->OriginNet() );
 
+                        if( aCommit )
+                            aCommit->Modify( item->Parent() );
+
                         item->Parent()->SetNetCode( cluster->OriginNet() );
                         n_changed++;
                     }
@@ -496,10 +500,10 @@ void CN_CONNECTIVITY_ALGO::propagateConnections()
 }
 
 
-void CN_CONNECTIVITY_ALGO::PropagateNets()
+void CN_CONNECTIVITY_ALGO::PropagateNets( BOARD_COMMIT* aCommit )
 {
     m_connClusters = SearchClusters( CSM_PROPAGATE );
-    propagateConnections();
+    propagateConnections( aCommit );
 }
 
 

pcbnew/connectivity/connectivity_algo.h

@@ -155,7 +155,8 @@ private:
     void    searchConnections();
 
     void    update();
-    void    propagateConnections();
+
+    void    propagateConnections( BOARD_COMMIT* aCommit = nullptr );
 
     template <class Container, class BItem>
     void add( Container& c, BItem brditem )
@@ -223,7 +224,12 @@ public:
     const CLUSTERS  SearchClusters( CLUSTER_SEARCH_MODE aMode, const KICAD_T aTypes[], int aSingleNet );
     const CLUSTERS  SearchClusters( CLUSTER_SEARCH_MODE aMode );
 
-    void    PropagateNets();
+    /**
+     * Propagates nets from pads to other items in clusters
+     * @param aCommit is used to store undo information for items modified by the call
+     */
+    void    PropagateNets( BOARD_COMMIT* aCommit = nullptr );
+
     void    FindIsolatedCopperIslands( ZONE_CONTAINER* aZone, std::vector<int>& aIslands );
 
     /**

pcbnew/connectivity/connectivity_data.cpp

@@ -147,9 +147,9 @@ void CONNECTIVITY_DATA::addRatsnestCluster( const std::shared_ptr<CN_CLUSTER>& a
 }
 
 
-void CONNECTIVITY_DATA::RecalculateRatsnest()
+void CONNECTIVITY_DATA::RecalculateRatsnest( BOARD_COMMIT* aCommit  )
 {
-    m_connAlgo->PropagateNets();
+    m_connAlgo->PropagateNets( aCommit );
 
     int lastNet = m_connAlgo->NetCount();
 

pcbnew/connectivity/connectivity_data.h

@@ -41,6 +41,7 @@ class CN_CLUSTER;
 class CN_CONNECTIVITY_ALGO;
 class CN_EDGE;
 class BOARD;
+class BOARD_COMMIT;
 class BOARD_CONNECTED_ITEM;
 class BOARD_ITEM;
 class ZONE_CONTAINER;
@@ -157,8 +158,9 @@ public:
     /**
      * Function RecalculateRatsnest()
      * Updates the ratsnest for the board.
+     * @param aCommit is used to save the undo state of items modified by this call
      */
-    void RecalculateRatsnest();
+    void RecalculateRatsnest( BOARD_COMMIT* aCommit = nullptr );
 
     /**
      * Function GetUnconnectedCount()