Salome HOME
Fix for delete message bug with pairs document and group
[modules/shaper.git] / src / Model / Model_Session.cpp
index 9618362e823e60de18874e85d6efd33650ca7035..c0dde0f287ea7bea7ff7f529b0ed201c658cd845 100644 (file)
@@ -1,32 +1,57 @@
-// Copyright (C) 2014-20xx CEA/DEN, EDF R&D
-
-// File:        Model_Session.cxx
-// Created:     20 Mar 2014
-// Author:      Mikhail PONIKAROV
+// Copyright (C) 2014-2017  CEA/DEN, EDF R&D
+//
+// This library is free software; you can redistribute it and/or
+// modify it under the terms of the GNU Lesser General Public
+// License as published by the Free Software Foundation; either
+// version 2.1 of the License, or (at your option) any later version.
+//
+// This library is distributed in the hope that it will be useful,
+// but WITHOUT ANY WARRANTY; without even the implied warranty of
+// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+// Lesser General Public License for more details.
+//
+// You should have received a copy of the GNU Lesser General Public
+// License along with this library; if not, write to the Free Software
+// Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
+//
+// See http://www.salome-platform.org/ or
+// email : webmaster.salome@opencascade.com<mailto:webmaster.salome@opencascade.com>
+//
 
 #include <Model_Session.h>
 #include <ModelAPI_Feature.h>
 #include <ModelAPI_Plugin.h>
 #include <Model_Data.h>
 #include <Model_Document.h>
+#include <Model_Objects.h>
 #include <Model_Application.h>
 #include <Model_Events.h>
 #include <Model_Validator.h>
 #include <ModelAPI_Events.h>
 #include <Events_Loop.h>
-#include <Events_Error.h>
+#include <Events_InfoMessage.h>
 #include <Config_FeatureMessage.h>
 #include <Config_AttributeMessage.h>
 #include <Config_ValidatorMessage.h>
 #include <Config_ModuleReader.h>
+#include <Config_ValidatorReader.h>
+#include <Config_PluginMessage.h>
+
+#include <ModelAPI_CompositeFeature.h>
 #include <ModelAPI_ResultPart.h>
+#include <ModelAPI_Tools.h>
 
+#include <TDF_ChildIDIterator.hxx>
 #include <TDF_CopyTool.hxx>
 #include <TDF_DataSet.hxx>
 #include <TDF_RelocationTable.hxx>
 #include <TDF_ClosureTool.hxx>
 
-using namespace std;
+#include <TNaming_Builder.hxx>
+#include <TNaming_Iterator.hxx>
+#include <TNaming_NamedShape.hxx>
+
+#include <TopoDS_Shape.hxx>
 
 static Model_Session* myImpl = new Model_Session();
 
@@ -35,37 +60,44 @@ static Model_Session* myImpl = new Model_Session();
 
 bool Model_Session::load(const char* theFileName)
 {
-  bool aRes = ROOT_DOC->load(theFileName);
+  bool aRes = ROOT_DOC->load(theFileName, "root", ROOT_DOC);
   return aRes;
 }
 
 bool Model_Session::save(const char* theFileName, std::list<std::string>& theResults)
 {
-  return ROOT_DOC->save(theFileName, theResults);
+  return ROOT_DOC->save(theFileName, "root", theResults);
 }
 
 void Model_Session::closeAll()
 {
-  ROOT_DOC->close(true);
   Model_Application::getApplication()->deleteAllDocuments();
 }
 
-void Model_Session::startOperation(const std::string& theId)
+void Model_Session::startOperation(const std::string& theId, const bool theAttachedToNested)
 {
+  myOperationAttachedToNext = theAttachedToNested;
   ROOT_DOC->startOperation();
   ROOT_DOC->operationId(theId);
   static std::shared_ptr<Events_Message> aStartedMsg
     (new Events_Message(Events_Loop::eventByName("StartOperation")));
   Events_Loop::loop()->send(aStartedMsg);
   // remove all useless documents that has been closed: on start of operation undo/redo is cleared
-  std::list<std::shared_ptr<ModelAPI_Document> > aUsedDocs = allOpenedDocuments();
-  Model_Application::getApplication()->removeUselessDocuments(aUsedDocs);
+  // MPV: this code is dangerous now because it may close the document that is activated right now
+  // but not in the list of the opened documents yet (create, delete, undo, activate Part)
+  // later this must be updated by correct usage of uniques IDs of documents, not names of results
+  //std::list<std::shared_ptr<ModelAPI_Document> > aUsedDocs = allOpenedDocuments();
+  //Model_Application::getApplication()->removeUselessDocuments(aUsedDocs);
 }
 
 void Model_Session::finishOperation()
 {
   setCheckTransactions(false);
   ROOT_DOC->finishOperation();
+  if (myOperationAttachedToNext) { // twice, with nested
+    ROOT_DOC->finishOperation();
+    myOperationAttachedToNext = false;
+  }
   setCheckTransactions(true);
 }
 
@@ -73,6 +105,10 @@ void Model_Session::abortOperation()
 {
   setCheckTransactions(false);
   ROOT_DOC->abortOperation();
+  if (myOperationAttachedToNext) { // twice, with nested
+    ROOT_DOC->abortOperation();
+    myOperationAttachedToNext = false;
+  }
   setCheckTransactions(true);
   // here the update mechanism may work after abort, so, supress the warnings about
   // modifications outside of the transactions
@@ -130,10 +166,33 @@ std::list<std::string> Model_Session::redoList()
   return ROOT_DOC->redoList();
 }
 
-FeaturePtr Model_Session::createFeature(string theFeatureID)
+ModelAPI_Plugin* Model_Session::getPlugin(const std::string& thePluginName)
+{
+  if (myPluginObjs.find(thePluginName) == myPluginObjs.end()) {
+    // before load the used plugins
+    if (myUsePlugins.find(thePluginName) != myUsePlugins.end()) {
+      std::string aUse = myUsePlugins[thePluginName];
+      std::stringstream aUseStream(aUse);
+      std::string aPluginName;
+      while (std::getline(aUseStream, aPluginName, ',')) {
+        if (myPluginObjs.find(aPluginName) == myPluginObjs.end())
+          getPlugin(aPluginName);
+      }
+    }
+    // load plugin library if not yet done
+    Config_ModuleReader::loadPlugin(thePluginName);
+  }
+  if (myPluginObjs.find(thePluginName) == myPluginObjs.end()) {
+    Events_InfoMessage("Model_Session", "Can not load plugin '%1'").arg(thePluginName).send();
+    return NULL;
+  }
+  return myPluginObjs[thePluginName];
+}
+
+FeaturePtr Model_Session::createFeature(std::string theFeatureID, Model_Document* theDocOwner)
 {
   if (this != myImpl) {
-    return myImpl->createFeature(theFeatureID);
+    return myImpl->createFeature(theFeatureID, theDocOwner);
   }
 
   // load all information about plugins, features and attributes
@@ -141,30 +200,26 @@ FeaturePtr Model_Session::createFeature(string theFeatureID)
 
   if (myPlugins.find(theFeatureID) != myPlugins.end()) {
     std::pair<std::string, std::string>& aPlugin = myPlugins[theFeatureID]; // plugin and doc kind
-    if (!aPlugin.second.empty() && aPlugin.second != activeDocument()->kind()) {
-      Events_Error::send(
-          string("Feature '") + theFeatureID + "' can be created only in document '"
-              + aPlugin.second + "' by the XML definition");
+    if (!aPlugin.second.empty() && aPlugin.second != theDocOwner->kind()) {
+      Events_InfoMessage("Model_Session",
+        "Feature '%1' can be created only in document '%2' by the XML definition")
+        .arg(theFeatureID).arg(aPlugin.second).send();
       return FeaturePtr();
     }
-    myCurrentPluginName = aPlugin.first;
-    if (myPluginObjs.find(myCurrentPluginName) == myPluginObjs.end()) {
-      // load plugin library if not yet done
-      Config_ModuleReader::loadPlugin(myCurrentPluginName);
-    }
-    if (myPluginObjs.find(myCurrentPluginName) != myPluginObjs.end()) {
-      FeaturePtr aCreated = myPluginObjs[myCurrentPluginName]->createFeature(theFeatureID);
+    ModelAPI_Plugin* aPluginObj = getPlugin(aPlugin.first);
+    if (aPluginObj) {
+      FeaturePtr aCreated = aPluginObj->createFeature(theFeatureID);
       if (!aCreated) {
-        Events_Error::send(
-            string("Can not initialize feature '") + theFeatureID + "' in plugin '"
-                + myCurrentPluginName + "'");
+        Events_InfoMessage("Model_Session", "Can not initialize feature '%1' in plugin '%2'")
+          .arg(theFeatureID).arg(aPlugin.first).send();
       }
       return aCreated;
     } else {
-      Events_Error::send(string("Can not load plugin '") + myCurrentPluginName + "'");
+      Events_InfoMessage("Model_Session", "Can not load plugin '%1'").arg(aPlugin.first).send();
     }
   } else {
-    Events_Error::send(string("Feature '") + theFeatureID + "' not found in any plugin");
+    Events_InfoMessage("Model_Session",
+      "Feature '%1' not found in any plugin").arg(theFeatureID).send();
   }
 
   return FeaturePtr();  // return nothing
@@ -172,29 +227,31 @@ FeaturePtr Model_Session::createFeature(string theFeatureID)
 
 std::shared_ptr<ModelAPI_Document> Model_Session::moduleDocument()
 {
-  bool aFirstCall = !Model_Application::getApplication()->hasDocument("root");
+  Handle(Model_Application) anApp = Model_Application::getApplication();
+  bool aFirstCall = !anApp->hasRoot();
   if (aFirstCall) {
+    // to be sure that plugins are loaded,
+    // even before the first "createFeature" call (in unit tests)
+
+    LoadPluginsInfo();
     // creation of the root document is always outside of the transaction, so, avoid checking it
     setCheckTransactions(false);
-  }
-  std::shared_ptr<ModelAPI_Document> aDoc = std::shared_ptr<ModelAPI_Document>(
-      Model_Application::getApplication()->getDocument("root"));
-  if (aFirstCall) {
+    anApp->createDocument(0); // 0 is a root ID
     // creation of the root document is always outside of the transaction, so, avoid checking it
     setCheckTransactions(true);
   }
-  return aDoc;
+  return anApp->rootDocument();
 }
 
-std::shared_ptr<ModelAPI_Document> Model_Session::document(std::string theDocID)
+std::shared_ptr<ModelAPI_Document> Model_Session::document(int theDocID)
 {
   return std::shared_ptr<ModelAPI_Document>(
-      Model_Application::getApplication()->getDocument(theDocID));
+      Model_Application::getApplication()->document(theDocID));
 }
 
 bool Model_Session::hasModuleDocument()
 {
-  return Model_Application::getApplication()->hasDocument("root");
+  return Model_Application::getApplication()->hasRoot();
 }
 
 std::shared_ptr<ModelAPI_Document> Model_Session::activeDocument()
@@ -204,18 +261,54 @@ std::shared_ptr<ModelAPI_Document> Model_Session::activeDocument()
   return myCurrentDoc;
 }
 
+/// makes the last feature in the document as the current
+static void makeCurrentLast(std::shared_ptr<ModelAPI_Document> theDoc) {
+  if (theDoc.get()) {
+    FeaturePtr aLast = std::dynamic_pointer_cast<Model_Document>(theDoc)->lastFeature();
+    // if last is nested into something else, make this something else as last:
+    // otherwise it will look like edition of sub-element, so, the main will be disabled
+    if (aLast.get()) {
+      CompositeFeaturePtr aMain = ModelAPI_Tools::compositeOwner(aLast);
+      while(aMain.get()) {
+        aLast = aMain;
+        aMain = ModelAPI_Tools::compositeOwner(aLast);
+      }
+    }
+    theDoc->setCurrentFeature(aLast, false);
+  }
+}
+
 void Model_Session::setActiveDocument(
   std::shared_ptr<ModelAPI_Document> theDoc, bool theSendSignal)
 {
   if (myCurrentDoc != theDoc) {
+    if (myCurrentDoc.get())
+      myCurrentDoc->setActive(false);
+    if (theDoc.get())
+      theDoc->setActive(true);
+
+    std::shared_ptr<ModelAPI_Document> aPrevious = myCurrentDoc;
     myCurrentDoc = theDoc;
     if (theDoc.get() && theSendSignal) {
+      // this must be before the synchronisation call because features in PartSet lower than this
+      // part feature must be disabled and don't recomputed anymore (issue 1156,
+      // translation feature is failed on activation of Part 2)
+      if (isOperation()) { // do it only in transaction, not on opening of document
+        DocumentPtr aRoot = moduleDocument();
+        if (myCurrentDoc != aRoot) {
+          FeaturePtr aPartFeat = ModelAPI_Tools::findPartFeature(aRoot, myCurrentDoc);
+          if (aPartFeat.get()) {
+            aRoot->setCurrentFeature(aPartFeat, false);
+          }
+        }
+      }
       // syncronize the document: it may be just opened or opened but removed before
       std::shared_ptr<Model_Document> aDoc = std::dynamic_pointer_cast<Model_Document>(theDoc);
       if (aDoc.get()) {
         bool aWasChecked = myCheckTransactions;
         setCheckTransactions(false);
-        aDoc->synchronizeFeatures(false, true);
+        TDF_LabelList anEmptyUpdated;
+        aDoc->objects()->synchronizeFeatures(anEmptyUpdated, true, true, false, true);
         if (aWasChecked)
             setCheckTransactions(true);
       }
@@ -223,37 +316,49 @@ void Model_Session::setActiveDocument(
           new Events_Message(Events_Loop::eventByName(EVENT_DOCUMENT_CHANGED)));
       Events_Loop::loop()->send(aMsg);
     }
+    // make the current state correct and synchronised in the module and sub-documents
+    if (isOperation()) { // do it only in transaction, not on opening of document
+      if (myCurrentDoc == moduleDocument()) {
+        // make the current feature the latest in root, in previous root current become also last
+        makeCurrentLast(aPrevious);
+        makeCurrentLast(myCurrentDoc);
+      } else {
+        // make the current feature the latest in sub, root current feature becomes this sub
+        makeCurrentLast(myCurrentDoc);
+      }
+    }
   }
 }
 
 std::list<std::shared_ptr<ModelAPI_Document> > Model_Session::allOpenedDocuments()
 {
-  list<std::shared_ptr<ModelAPI_Document> > aResult;
+  std::list<std::shared_ptr<ModelAPI_Document> > aResult;
   aResult.push_back(moduleDocument());
   // add subs recursively
-  list<std::shared_ptr<ModelAPI_Document> >::iterator aDoc = aResult.begin();
+  std::list<std::shared_ptr<ModelAPI_Document> >::iterator aDoc = aResult.begin();
   for(; aDoc != aResult.end(); aDoc++) {
     DocumentPtr anAPIDoc = *aDoc;
     std::shared_ptr<Model_Document> aDoc = std::dynamic_pointer_cast<Model_Document>(anAPIDoc);
     if (aDoc) {
-      const std::set<std::string> aSubs = aDoc->subDocuments(true);
-      std::set<std::string>::const_iterator aSubIter = aSubs.cbegin();
+      const std::set<int> aSubs = aDoc->subDocuments();
+      std::set<int>::const_iterator aSubIter = aSubs.cbegin();
       for(; aSubIter != aSubs.cend(); aSubIter++) {
-        if (!Model_Application::getApplication()->isLoadByDemand(*aSubIter)) {
-          aResult.push_back(Model_Application::getApplication()->getDocument(*aSubIter));
-        }
+        aResult.push_back(Model_Application::getApplication()->document(*aSubIter));
       }
     }
   }
   return aResult;
 }
 
+bool Model_Session::isLoadByDemand(const std::string theDocID, const int theDocIndex)
+{
+  return Model_Application::getApplication()->isLoadByDemand(theDocID, theDocIndex);
+}
+
 std::shared_ptr<ModelAPI_Document> Model_Session::copy(
-    std::shared_ptr<ModelAPI_Document> theSource, std::string theID)
+    std::shared_ptr<ModelAPI_Document> theSource, const int theDestID)
 {
-  // create a new document
-  std::shared_ptr<Model_Document> aNew = std::dynamic_pointer_cast<Model_Document>(
-      Model_Application::getApplication()->getDocument(theID));
+  std::shared_ptr<Model_Document> aNew = Model_Application::getApplication()->document(theDestID);
   // make a copy of all labels
   TDF_Label aSourceRoot = std::dynamic_pointer_cast<Model_Document>(theSource)->document()->Main()
       .Father();
@@ -261,11 +366,56 @@ std::shared_ptr<ModelAPI_Document> Model_Session::copy(
   Handle(TDF_DataSet) aDS = new TDF_DataSet;
   aDS->AddLabel(aSourceRoot);
   TDF_ClosureTool::Closure(aDS);
-  Handle(TDF_RelocationTable) aRT = new TDF_RelocationTable;
+  Handle(TDF_RelocationTable) aRT = new TDF_RelocationTable(Standard_True);
   aRT->SetRelocation(aSourceRoot, aTargetRoot);
   TDF_CopyTool::Copy(aDS, aRT);
 
-  aNew->synchronizeFeatures(false, true);
+  // TODO: remove after fix in OCCT.
+  // All named shapes are stored in reversed order, so to fix this we reverse them back.
+  for(TDF_ChildIDIterator aChildIter(aTargetRoot, TNaming_NamedShape::GetID(), true);
+      aChildIter.More();
+      aChildIter.Next()) {
+    Handle(TNaming_NamedShape) aNamedShape =
+      Handle(TNaming_NamedShape)::DownCast(aChildIter.Value());
+    if (aNamedShape.IsNull()) {
+      continue;
+    }
+
+    TopoDS_Shape aShape = aNamedShape->Get();
+    if(aShape.IsNull() || aShape.ShapeType() != TopAbs_COMPOUND) {
+      continue;
+    }
+
+    TNaming_Evolution anEvol = aNamedShape->Evolution();
+    std::list<std::pair<TopoDS_Shape, TopoDS_Shape> > aShapePairs; // to store old and new shapes
+    for(TNaming_Iterator anIter(aNamedShape); anIter.More(); anIter.Next()) {
+      aShapePairs.push_back(
+        std::pair<TopoDS_Shape, TopoDS_Shape>(anIter.OldShape(), anIter.NewShape()));
+    }
+
+    // Add in reverse order.
+    TDF_Label aLabel = aNamedShape->Label();
+    TNaming_Builder aBuilder(aLabel);
+    for(std::list<std::pair<TopoDS_Shape, TopoDS_Shape> >::iterator aPairsIter =
+          aShapePairs.begin();
+        aPairsIter != aShapePairs.end();
+        aPairsIter++) {
+      if (anEvol == TNaming_GENERATED) {
+        aBuilder.Generated(aPairsIter->first, aPairsIter->second);
+      } else if (anEvol == TNaming_MODIFY) {
+        aBuilder.Modify(aPairsIter->first, aPairsIter->second);
+      } else if (anEvol == TNaming_DELETE) {
+        aBuilder.Delete(aPairsIter->first);
+      } else if (anEvol == TNaming_PRIMITIVE) {
+        aBuilder.Generated(aPairsIter->second);
+      } else if (anEvol == TNaming_SELECTED) {
+        aBuilder.Select(aPairsIter->second, aPairsIter->first);
+      }
+    }
+  }
+
+  TDF_LabelList anEmptyUpdated;
+  aNew->objects()->synchronizeFeatures(anEmptyUpdated, true, true, true, true);
   return aNew;
 }
 
@@ -273,52 +423,60 @@ Model_Session::Model_Session()
 {
   myPluginsInfoLoaded = false;
   myCheckTransactions = true;
+  myOperationAttachedToNext = false;
   ModelAPI_Session::setSession(std::shared_ptr<ModelAPI_Session>(this));
   // register the configuration reading listener
   Events_Loop* aLoop = Events_Loop::loop();
-  static const Events_ID kFeatureEvent = 
+  static const Events_ID kFeatureEvent =
     Events_Loop::eventByName(Config_FeatureMessage::MODEL_EVENT());
   aLoop->registerListener(this, kFeatureEvent);
   aLoop->registerListener(this, Events_Loop::eventByName(EVENT_OBJECT_CREATED), 0, true);
   aLoop->registerListener(this, Events_Loop::eventByName(EVENT_OBJECT_UPDATED), 0, true);
   aLoop->registerListener(this, Events_Loop::eventByName(EVENT_OBJECT_DELETED), 0, true);
   aLoop->registerListener(this, Events_Loop::eventByName(EVENT_VALIDATOR_LOADED));
+  aLoop->registerListener(this, Events_Loop::eventByName(Config_PluginMessage::EVENT_ID()));
 }
 
 void Model_Session::processEvent(const std::shared_ptr<Events_Message>& theMessage)
 {
-  static const Events_ID kFeatureEvent = 
+  static const Events_ID kFeatureEvent =
     Events_Loop::eventByName(Config_FeatureMessage::MODEL_EVENT());
   static const Events_ID kValidatorEvent = Events_Loop::eventByName(EVENT_VALIDATOR_LOADED);
+  static const Events_ID kPluginEvent = Events_Loop::eventByName(Config_PluginMessage::EVENT_ID());
   if (theMessage->eventID() == kFeatureEvent) {
-    const std::shared_ptr<Config_FeatureMessage> aMsg = 
+    const std::shared_ptr<Config_FeatureMessage> aMsg =
       std::dynamic_pointer_cast<Config_FeatureMessage>(theMessage);
     if (aMsg) {
-      // proccess the plugin info, load plugin
+
+      // process the plugin info, load plugin
       if (myPlugins.find(aMsg->id()) == myPlugins.end()) {
         myPlugins[aMsg->id()] = std::pair<std::string, std::string>(
           aMsg->pluginLibrary(), aMsg->documentKind());
       }
     } else {
-      const std::shared_ptr<Config_AttributeMessage> aMsgAttr = 
+      const std::shared_ptr<Config_AttributeMessage> aMsgAttr =
         std::dynamic_pointer_cast<Config_AttributeMessage>(theMessage);
       if (aMsgAttr) {
+
         if (!aMsgAttr->isObligatory()) {
           validators()->registerNotObligatory(aMsgAttr->featureId(), aMsgAttr->attributeId());
         }
         if(aMsgAttr->isConcealment()) {
           validators()->registerConcealment(aMsgAttr->featureId(), aMsgAttr->attributeId());
         }
-        if (!aMsgAttr->caseId().empty()) {
-          validators()->registerCase(aMsgAttr->featureId(), aMsgAttr->attributeId(),
-            aMsgAttr->switchId(), aMsgAttr->caseId());
+        if(aMsgAttr->isMainArgument()) {
+          validators()->registerMainArgument(aMsgAttr->featureId(), aMsgAttr->attributeId());
+        }
+        const std::list<std::pair<std::string, std::string> >& aCases = aMsgAttr->getCases();
+        if (!aCases.empty()) {
+          validators()->registerCase(aMsgAttr->featureId(), aMsgAttr->attributeId(), aCases);
         }
       }
     }
     // plugins information was started to load, so, it will be loaded
     myPluginsInfoLoaded = true;
   } else if (theMessage->eventID() == kValidatorEvent) {
-    std::shared_ptr<Config_ValidatorMessage> aMsg = 
+    std::shared_ptr<Config_ValidatorMessage> aMsg =
       std::dynamic_pointer_cast<Config_ValidatorMessage>(theMessage);
     if (aMsg) {
       if (aMsg->attributeId().empty()) {  // feature validator
@@ -328,18 +486,51 @@ void Model_Session::processEvent(const std::shared_ptr<Events_Message>& theMessa
                                       aMsg->parameters());
       }
     }
+  } else if (theMessage->eventID() == kPluginEvent) { // plugin is started to load
+    std::shared_ptr<Config_PluginMessage> aMsg =
+      std::dynamic_pointer_cast<Config_PluginMessage>(theMessage);
+    if (aMsg.get()) {
+      myCurrentPluginName = aMsg->pluginId();
+      if (!aMsg->uses().empty()) {
+        myUsePlugins[myCurrentPluginName] = aMsg->uses();
+      }
+    }
   } else {  // create/update/delete
     if (myCheckTransactions && !isOperation())
-      Events_Error::send("Modification of data structure outside of the transaction");
+      Events_InfoMessage("Model_Session",
+        "Modification of data structure outside of the transaction").send();
     // if part is deleted, make the root as the current document (on undo of Parts creations)
     static const Events_ID kDeletedEvent = Events_Loop::eventByName(EVENT_OBJECT_DELETED);
     if (theMessage->eventID() == kDeletedEvent) {
       std::shared_ptr<ModelAPI_ObjectDeletedMessage> aDeleted =
         std::dynamic_pointer_cast<ModelAPI_ObjectDeletedMessage>(theMessage);
-      if (aDeleted && 
-          aDeleted->groups().find(ModelAPI_ResultPart::group()) != aDeleted->groups().end()) 
+
+      std::list<std::pair<std::shared_ptr<ModelAPI_Document>, std::string>>::const_iterator
+        aGIter = aDeleted->groups().cbegin();
+      for (; aGIter != aDeleted->groups().cend(); aGIter++) {
+        if (aGIter->second == ModelAPI_ResultPart::group())
+          break;
+      }
+      if (aGIter != aDeleted->groups().cend())
       {
-        setActiveDocument(moduleDocument());
+         // check that the current feature of the session is still the active Part (even disabled)
+        bool aFound = false;
+        FeaturePtr aCurrentPart = moduleDocument()->currentFeature(true);
+        if (aCurrentPart.get()) {
+          const std::list<std::shared_ptr<ModelAPI_Result> >& aResList = aCurrentPart->results();
+          std::list<std::shared_ptr<ModelAPI_Result> >::const_iterator aRes = aResList.begin();
+          for(; !aFound && aRes != aResList.end(); aRes++) {
+            ResultPartPtr aPRes = std::dynamic_pointer_cast<ModelAPI_ResultPart>(*aRes);
+            if (aPRes.get() && aPRes->isActivated() && aPRes->partDoc() == activeDocument()) {
+              aFound = true;
+
+            }
+          }
+        }
+        if (!aFound) { // if not, the part was removed, so activate the module document
+          if (myCurrentDoc.get())
+            setActiveDocument(moduleDocument());
+        }
       }
     }
   }
@@ -349,18 +540,23 @@ void Model_Session::LoadPluginsInfo()
 {
   if (myPluginsInfoLoaded)  // nothing to do
     return;
-
   // Read plugins information from XML files
-  Config_ModuleReader aXMLReader(Config_FeatureMessage::MODEL_EVENT());
-  aXMLReader.readAll();
+  Config_ModuleReader aModuleReader(Config_FeatureMessage::MODEL_EVENT());
+  aModuleReader.readAll();
+  std::set<std::string> aFiles = aModuleReader.modulePluginFiles();
+  std::set<std::string>::iterator it = aFiles.begin();
+  for ( ; it != aFiles.end(); it++ ) {
+    Config_ValidatorReader aValidatorReader (*it);
+    aValidatorReader.readAll();
+  };
+
 }
 
 void Model_Session::registerPlugin(ModelAPI_Plugin* thePlugin)
 {
   myPluginObjs[myCurrentPluginName] = thePlugin;
   static Events_ID EVENT_LOAD = Events_Loop::loop()->eventByName(EVENT_PLUGIN_LOADED);
-  ModelAPI_EventCreator::get()->sendUpdated(ObjectPtr(), EVENT_LOAD);
-  Events_Loop::loop()->flush(EVENT_LOAD);
+  ModelAPI_EventCreator::get()->sendUpdated(ObjectPtr(), EVENT_LOAD, false);
   // If the plugin has an ability to process GUI events, register it
   Events_Listener* aListener = dynamic_cast<Events_Listener*>(thePlugin);
   if (aListener) {
@@ -376,3 +572,8 @@ ModelAPI_ValidatorsFactory* Model_Session::validators()
   static Model_ValidatorsFactory* aFactory = new Model_ValidatorsFactory;
   return aFactory;
 }
+
+int Model_Session::transactionID()
+{
+  return ROOT_DOC->transactionID();
+}