Undo buffer for the PNS router. Still, it has a bug - it crashes when an undo/redo operation is performed while routing a track.

pcbnew/router/pns_router.cpp

@@ -241,7 +241,6 @@ void PNS_ROUTER::SyncWorld()
 
     ClearWorld();
 
-
     m_clearanceFunc = new PCBNEW_CLEARANCE_FUNC( m_board );
     m_world = new PNS_NODE();
     m_world->SetClearanceFunctor( m_clearanceFunc );
@@ -584,8 +583,9 @@ void PNS_ROUTER::commitRouting( PNS_NODE* aNode )
 
         if( parent )
         {
-            m_view->Remove( parent );
+            m_undoBuffer.PushItem( ITEM_PICKER( parent, UR_DELETED ) );
             m_board->Remove( parent );
+            m_view->Remove( parent );
         }
     }
 
@@ -632,6 +632,7 @@ void PNS_ROUTER::commitRouting( PNS_NODE* aNode )
             m_view->Add( newBI );
             m_board->Add( newBI );
             m_board->GetRatsnest()->Update( newBI );
+            m_undoBuffer.PushItem( ITEM_PICKER( newBI, UR_NEW ) );
             newBI->ViewUpdate( KIGFX::VIEW_ITEM::GEOMETRY );
         }
     }

pcbnew/router/pns_router.h

@@ -27,6 +27,7 @@
 #include <boost/unordered_set.hpp>
 
 #include <geometry/shape_line_chain.h>
+#include <class_undoredo_container.h>
 
 #include "pns_routing_settings.h"
 #include "pns_item.h"
@@ -137,6 +138,18 @@ public:
     const PNS_ITEMSET   QueryHoverItems( const VECTOR2I& aP );
     const VECTOR2I      SnapToItem( PNS_ITEM* item, VECTOR2I aP, bool& aSplitsSegment );
 
+    /**
+     * Returns the last changes introduced by the router. After calling the method the list of
+     * changes is cleared, so only the latest changes are stored.
+     */
+    PICKED_ITEMS_LIST GetLastChanges()
+    {
+        PICKED_ITEMS_LIST copy = m_undoBuffer;
+        m_undoBuffer.ClearItemsList();          // TODO and delete?
+
+        return copy;
+    }
+
 private:
     void clearViewFlags();
 
@@ -188,6 +201,9 @@ private:
     PNS_CLEARANCE_FUNC* m_clearanceFunc;
 
     boost::unordered_set<BOARD_ITEM*> m_hiddenItems;
+
+    ///> Stores list of modified items in the current operation
+    PICKED_ITEMS_LIST m_undoBuffer;
 };
 
 #endif

pcbnew/router/router_tool.cpp

@@ -322,6 +322,11 @@ void ROUTER_TOOL::startRouting()
             updateEndItem( *evt );
             m_router->Move( m_endSnapPoint, m_endItem );
         }
+        else if( evt->Action() == TA_UNDO_REDO )
+        {
+            std::cout << "syncing the world while routing, I am going to craaaaaaaaaaaash!" << std::endl;
+            m_router->SyncWorld();
+        }
         else if( evt->IsClick( BUT_LEFT ) )
         {
             updateEndItem( *evt );
@@ -371,6 +376,10 @@ void ROUTER_TOOL::startRouting()
 
     m_router->StopRouting();
 
+    // Save the recent changes in the undo buffer
+    getEditFrame<PCB_EDIT_FRAME>()->SaveCopyInUndoList( m_router->GetLastChanges(), UR_UNSPECIFIED );
+    getEditFrame<PCB_EDIT_FRAME>()->OnModify();
+
     ctls->SetAutoPan( false );
     ctls->ForceCursorPosition( false );
     highlightNet( false );
@@ -392,6 +401,8 @@ int ROUTER_TOOL::Main( TOOL_EVENT& aEvent )
     {
         if( evt->IsCancel() )
             break; // Finish
+        else if( evt->Action() == TA_UNDO_REDO )
+            m_router->SyncWorld();
         else if( evt->IsMotion() )
             updateStartItem( *evt );
         else if( evt->IsClick( BUT_LEFT ) )