src/Model/Model_Update.cpp

   1 // Copyright (C) 2014-2017  CEA/DEN, EDF R&D
   2 //
   3 // This library is free software; you can redistribute it and/or
   4 // modify it under the terms of the GNU Lesser General Public
   5 // License as published by the Free Software Foundation; either
   6 // version 2.1 of the License, or (at your option) any later version.
   7 //
   8 // This library is distributed in the hope that it will be useful,
   9 // but WITHOUT ANY WARRANTY; without even the implied warranty of
  10 // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  11 // Lesser General Public License for more details.
  12 //
  13 // You should have received a copy of the GNU Lesser General Public
  14 // License along with this library; if not, write to the Free Software
  15 // Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
  16 //
  17 // See http://www.salome-platform.org/ or
  18 // email : webmaster.salome@opencascade.com<mailto:webmaster.salome@opencascade.com>
  19 //
  20
  21 #include <Model_Update.h>
  22 #include <Model_Document.h>
  23 #include <Model_Data.h>
  24 #include <Model_Objects.h>
  25 #include <Model_AttributeSelection.h>
  26 #include <ModelAPI_Feature.h>
  27 #include <ModelAPI_Data.h>
  28 #include <ModelAPI_Document.h>
  29 #include <ModelAPI_Events.h>
  30 #include <ModelAPI_AttributeReference.h>
  31 #include <ModelAPI_AttributeRefList.h>
  32 #include <ModelAPI_AttributeRefAttr.h>
  33 #include <ModelAPI_AttributeSelection.h>
  34 #include <ModelAPI_AttributeSelectionList.h>
  35 #include <ModelAPI_Result.h>
  36 #include <ModelAPI_ResultPart.h>
  37 #include <ModelAPI_Validator.h>
  38 #include <ModelAPI_CompositeFeature.h>
  39 #include <ModelAPI_Session.h>
  40 #include <ModelAPI_Tools.h>
  41 #include <GeomAPI_Shape.h>
  42 #include <GeomDataAPI_Point.h>
  43 #include <GeomDataAPI_Point2D.h>
  44 #include <Events_Loop.h>
  45 #include <Events_LongOp.h>
  46 #include <Events_InfoMessage.h>
  47 #include <Config_PropManager.h>
  48
  49 Model_Update MY_UPDATER_INSTANCE;  /// the only one instance initialized on load of the library
  50 //#define DEB_UPDATE
  51
  52 Model_Update::Model_Update()
  53 {
  54   Events_Loop* aLoop = Events_Loop::loop();
  55   static const Events_ID kChangedEvent = aLoop->eventByName("PreferenceChanged");
  56   aLoop->registerListener(this, kChangedEvent);
  57   static const Events_ID kCreatedEvent = Events_Loop::loop()->eventByName(EVENT_OBJECT_CREATED);
  58   aLoop->registerListener(this, kCreatedEvent);
  59   static const Events_ID kUpdatedEvent = Events_Loop::loop()->eventByName(EVENT_OBJECT_UPDATED);
  60   aLoop->registerListener(this, kUpdatedEvent);
  61   static const Events_ID kOpFinishEvent = aLoop->eventByName("FinishOperation");
  62   aLoop->registerListener(this, kOpFinishEvent);
  63   static const Events_ID kOpAbortEvent = aLoop->eventByName("AbortOperation");
  64   aLoop->registerListener(this, kOpAbortEvent);
  65   static const Events_ID kOpStartEvent = aLoop->eventByName("StartOperation");
  66   aLoop->registerListener(this, kOpStartEvent);
  67   static const Events_ID kStabilityEvent = aLoop->eventByName(EVENT_STABILITY_CHANGED);
  68   aLoop->registerListener(this, kStabilityEvent);
  69   static const Events_ID kPreviewBlockedEvent = aLoop->eventByName(EVENT_PREVIEW_BLOCKED);
  70   aLoop->registerListener(this, kPreviewBlockedEvent);
  71   static const Events_ID kPreviewRequestedEvent = aLoop->eventByName(EVENT_PREVIEW_REQUESTED);
  72   aLoop->registerListener(this, kPreviewRequestedEvent);
  73   static const Events_ID kReorderEvent = aLoop->eventByName(EVENT_ORDER_UPDATED);
  74   aLoop->registerListener(this, kReorderEvent);
  75   static const Events_ID kUpdatedSel = aLoop->eventByName(EVENT_UPDATE_SELECTION);
  76   aLoop->registerListener(this, kUpdatedSel);
  77
  78   //  Config_PropManager::findProp("Model update", "automatic_rebuild")->value() == "true";
  79   myIsParamUpdated = false;
  80   myIsFinish = false;
  81   myIsProcessed = false;
  82   myIsPreviewBlocked = false;
  83 }
  84
  85 bool Model_Update::addModified(FeaturePtr theFeature, FeaturePtr theReason) {
  86
  87   if (!theFeature->data()->isValid())
  88     return false; // delete an extrusion created on the sketch
  89
  90
  91   bool isNotExecuted = theFeature->isPersistentResult() &&
  92     !std::dynamic_pointer_cast<Model_Document>((theFeature)->document())->executeFeatures();
  93   if (isNotExecuted) {
  94     redisplayWithResults(theFeature, ModelAPI_StateNothing, false); // redisplay even not executed
  95     if (!theReason.get()) // no reason => no construction reason
  96       return false;
  97     if (myNotPersistentRefs.find(theFeature) == myNotPersistentRefs.end()) {
  98       myNotPersistentRefs[theFeature].insert(theReason);
  99     } else {
 100       std::set<std::shared_ptr<ModelAPI_Feature> > aNewSet;
 101       aNewSet.insert(theReason);
 102       myNotPersistentRefs[theFeature] = aNewSet;
 103     }
 104     return false;
 105   }
 106
 107   // update arguments for "apply button" state change
 108   if ((!theFeature->isPreviewNeeded() && !myIsFinish) || myIsPreviewBlocked) {
 109     if (theReason.get())
 110       myProcessOnFinish[theFeature].insert(theReason);
 111     else if (myProcessOnFinish.find(theFeature) == myProcessOnFinish.end())
 112       myProcessOnFinish[theFeature] = std::set<std::shared_ptr<ModelAPI_Feature> >();
 113 #ifdef DEB_UPDATE
 114       std::cout<<"*** Add process on finish "<<theFeature->name()<<std::endl;
 115 #endif
 116     // keeps the currently updated features to avoid infinitive cycling here: where feature on
 117     // "updateArguments" sends "updated" (in selection attribute) and goes here again
 118     static std::set<FeaturePtr> aCurrentlyUpdated;
 119     if (aCurrentlyUpdated.find(theFeature) == aCurrentlyUpdated.end()) {
 120       aCurrentlyUpdated.insert(theFeature);
 121       updateArguments(theFeature);
 122       aCurrentlyUpdated.erase(theFeature);
 123     }
 124     // make it without conditions otherwise the apply button may have a bad state
 125     theFeature->data()->execState(ModelAPI_StateDone);
 126     static ModelAPI_ValidatorsFactory* aFactory = ModelAPI_Session::get()->validators();
 127      // need to be validated to update the "Apply" state if not previewed
 128     aFactory->validate(theFeature);
 129
 130     // to redisplay split's arguments presentation, even result is not computed
 131     if (!theFeature->isPreviewNeeded()) {
 132       static Events_Loop* aLoop = Events_Loop::loop();
 133       static const Events_ID kRedisplayEvent = aLoop->eventByName(EVENT_OBJECT_TO_REDISPLAY);
 134       ModelAPI_EventCreator::get()->sendUpdated(theFeature, kRedisplayEvent);
 135       aLoop->flush(kRedisplayEvent);
 136     }
 137
 138     if (!myIsPreviewBlocked)
 139       return true;
 140   }
 141   if (myModified.find(theFeature) != myModified.end()) {
 142     if (theReason.get()) {
 143 #ifdef DEB_UPDATE
 144       //std::cout<<"*** Add already modified "
 145       //   <<theFeature->name()<<" reason "<<theReason->name()<<std::endl;
 146 #endif
 147       myModified[theFeature].insert(theReason);
 148     }
 149     return true;
 150   }
 151   // do not add the disabled, but possibly the sub-elements are not disabled
 152   bool aIsDisabled = theFeature->isDisabled();
 153   if (!aIsDisabled) {
 154     std::set<std::shared_ptr<ModelAPI_Feature> > aNewSet;
 155     if (theFeature->data()->execState() == ModelAPI_StateMustBeUpdated ||
 156         theFeature->data()->execState() == ModelAPI_StateInvalidArgument || // issue 1519
 157         theFeature->data()->execState() == ModelAPI_StateExecFailed) {
 158       // do not forget that in this case all were the reasons
 159       aNewSet.insert(theFeature);
 160     } else {
 161       if (theReason.get())
 162         aNewSet.insert(theReason);
 163     }
 164       myModified[theFeature] = aNewSet;
 165 #ifdef DEB_UPDATE
 166     if (theReason.get()) {
 167       //std::cout<<"*** Add modified "<<theFeature->name()
 168       //  <<" reason "<<theReason->name()<<std::endl;
 169     } else {
 170       //std::cout<<"*** Add modified "<<theFeature->name()<<std::endl;
 171     }
 172 #endif
 173   } else { // will be updated during the finish of the operation, or when it becomes enabled
 174     if (theFeature->data()->execState() == ModelAPI_StateDone ||
 175         theFeature->data()->execState() == ModelAPI_StateExecFailed) // fix issue 1819
 176       theFeature->data()->execState(ModelAPI_StateMustBeUpdated);
 177     else
 178       return true; // do not need iteration deeply if it is already marked as modified or so
 179 #ifdef DEB_UPDATE
 180     //std::cout<<"*** Set modified state "<<theFeature->name()<<std::endl;
 181 #endif
 182   }
 183   // clear processed and fill modified recursively
 184   const std::set<std::shared_ptr<ModelAPI_Attribute> >& aRefs = theFeature->data()->refsToMe();
 185   std::set<std::shared_ptr<ModelAPI_Attribute> >::const_iterator aRefIter = aRefs.cbegin();
 186   for(; aRefIter != aRefs.cend(); aRefIter++) {
 187     if ((*aRefIter)->isArgument()) {
 188       FeaturePtr aReferenced = std::dynamic_pointer_cast<ModelAPI_Feature>((*aRefIter)->owner());
 189       if (aReferenced.get()) {
 190         addModified(aReferenced, theFeature);
 191       }
 192     }
 193   }
 194   // proccess also results
 195   std::list<ResultPtr> allResults; // list of this feature and results
 196   ModelAPI_Tools::allResults(theFeature, allResults);
 197   std::list<ResultPtr>::iterator aRes = allResults.begin();
 198   for(; aRes != allResults.end(); aRes++) {
 199     const std::set<std::shared_ptr<ModelAPI_Attribute> >& aRefs = (*aRes)->data()->refsToMe();
 200     std::set<std::shared_ptr<ModelAPI_Attribute> >::const_iterator aRefIter = aRefs.cbegin();
 201     for(; aRefIter != aRefs.cend(); aRefIter++) {
 202       if ((*aRefIter)->isArgument()) {
 203         FeaturePtr aReferenced = std::dynamic_pointer_cast<ModelAPI_Feature>((*aRefIter)->owner());
 204         if (aReferenced.get()) {
 205           addModified(aReferenced, theFeature);
 206         }
 207       }
 208     }
 209   }
 210
 211   // also add part feature that contains this feature to the modified
 212   if (theFeature->document()->kind() != "PartSet") {
 213     FeaturePtr aPart = ModelAPI_Tools::findPartFeature(
 214       ModelAPI_Session::get()->moduleDocument(), theFeature->document());
 215     if (aPart.get())
 216       addModified(aPart, theFeature);
 217   }
 218   return true;
 219 }
 220
 221 void Model_Update::processEvent(const std::shared_ptr<Events_Message>& theMessage)
 222 {
 223   static Events_Loop* aLoop = Events_Loop::loop();
 224   static const Events_ID kCreatedEvent = aLoop->eventByName(EVENT_OBJECT_CREATED);
 225   static const Events_ID kUpdatedEvent = aLoop->eventByName(EVENT_OBJECT_UPDATED);
 226   static const Events_ID kOpFinishEvent = aLoop->eventByName("FinishOperation");
 227   static const Events_ID kOpAbortEvent = aLoop->eventByName("AbortOperation");
 228   static const Events_ID kOpStartEvent = aLoop->eventByName("StartOperation");
 229   static const Events_ID kStabilityEvent = aLoop->eventByName(EVENT_STABILITY_CHANGED);
 230   static const Events_ID kPreviewBlockedEvent = aLoop->eventByName(EVENT_PREVIEW_BLOCKED);
 231   static const Events_ID kPreviewRequestedEvent = aLoop->eventByName(EVENT_PREVIEW_REQUESTED);
 232   static const Events_ID kReorderEvent = aLoop->eventByName(EVENT_ORDER_UPDATED);
 233   static const Events_ID kRedisplayEvent = aLoop->eventByName(EVENT_OBJECT_TO_REDISPLAY);
 234   static const Events_ID kUpdatedSel = aLoop->eventByName(EVENT_UPDATE_SELECTION);
 235
 236 #ifdef DEB_UPDATE
 237   std::cout<<"****** Event "<<theMessage->eventID().eventText()<<std::endl;
 238 #endif
 239   if (theMessage->eventID() == kStabilityEvent) {
 240     updateStability(theMessage->sender());
 241     return;
 242   }
 243   if (theMessage->eventID() == kPreviewBlockedEvent) {
 244     myIsPreviewBlocked = true;
 245     return;
 246   }
 247   if (theMessage->eventID() == kPreviewRequestedEvent) {
 248     if (myIsPreviewBlocked) {
 249       myIsPreviewBlocked = false;
 250       processFeatures();
 251       myIsPreviewBlocked = true;
 252     }
 253     return;
 254   }
 255   if (theMessage->eventID() == kUpdatedSel) {
 256     std::shared_ptr<ModelAPI_ObjectUpdatedMessage> aMsg =
 257         std::dynamic_pointer_cast<ModelAPI_ObjectUpdatedMessage>(theMessage);
 258     updateSelection(aMsg->objects());
 259   }
 260   // creation is added to "update" to avoid recomputation twice:
 261   // on create and immediately after on update
 262   if (theMessage->eventID() == kCreatedEvent) {
 263     std::shared_ptr<ModelAPI_ObjectUpdatedMessage> aMsg =
 264         std::dynamic_pointer_cast<ModelAPI_ObjectUpdatedMessage>(theMessage);
 265     const std::set<ObjectPtr>& anObjs = aMsg->objects();
 266     std::set<ObjectPtr>::const_iterator anObjIter = anObjs.cbegin();
 267     for(; anObjIter != anObjs.cend(); anObjIter++) {
 268       if (std::dynamic_pointer_cast<Model_Document>((*anObjIter)->document())->executeFeatures()) {
 269         if ((*anObjIter)->groupName() == ModelAPI_Feature::group()) {
 270           // results creation means enabling, not update
 271           ModelAPI_EventCreator::get()->sendUpdated(*anObjIter, kUpdatedEvent);
 272         } else {
 273           ModelAPI_EventCreator::get()->sendUpdated(*anObjIter, kRedisplayEvent);
 274         }
 275       }
 276     }
 277     return;
 278   }
 279   if (theMessage->eventID() == kUpdatedEvent) {
 280     std::shared_ptr<ModelAPI_ObjectUpdatedMessage> aMsg =
 281         std::dynamic_pointer_cast<ModelAPI_ObjectUpdatedMessage>(theMessage);
 282     const std::set<ObjectPtr>& anObjs = aMsg->objects();
 283     std::set<ObjectPtr>::const_iterator anObjIter = anObjs.cbegin();
 284     bool aSomeModified = false; // check that features not changed: only redisplay is needed
 285     for(; anObjIter != anObjs.cend(); anObjIter++) {
 286       if (!(*anObjIter)->data()->isValid())
 287         continue;
 288 #ifdef DEB_UPDATE
 289       std::cout<<">>> in event updated "<<(*anObjIter)->groupName()<<
 290         " "<<(*anObjIter)->data()->name()<<std::endl;
 291 #endif
 292       if ((*anObjIter)->groupName() == ModelAPI_ResultParameter::group()) {
 293         myIsParamUpdated = true;
 294       }
 295       // on undo/redo, abort do not update persisten features
 296       FeaturePtr anUpdated = std::dynamic_pointer_cast<ModelAPI_Feature>(*anObjIter);
 297       if (anUpdated.get()) {
 298         if (addModified(anUpdated, FeaturePtr()))
 299           aSomeModified = true;
 300       } else {
 301         // process the updated result as update of features that refers to this result
 302         const std::set<std::shared_ptr<ModelAPI_Attribute> >&
 303           aRefs = (*anObjIter)->data()->refsToMe();
 304         std::set<std::shared_ptr<ModelAPI_Attribute> >::const_iterator aRefIter = aRefs.cbegin();
 305         FeaturePtr aReason;
 306         ResultPtr aReasonResult = std::dynamic_pointer_cast<ModelAPI_Result>(*anObjIter);
 307         if (aReasonResult.get())
 308           aReason = (*anObjIter)->document()->feature(aReasonResult);
 309         for(; aRefIter != aRefs.cend(); aRefIter++) {
 310           if (!(*aRefIter)->owner()->data()->isValid())
 311             continue;
 312           FeaturePtr anUpdated = std::dynamic_pointer_cast<ModelAPI_Feature>((*aRefIter)->owner());
 313           if (anUpdated.get()) {
 314             if (addModified(anUpdated, aReason))
 315               aSomeModified = true;
 316           }
 317         }
 318       }
 319     }
 320     // this event is for solver update, not here, do not react immediately
 321     if (aSomeModified) {
 322         processFeatures();
 323     }
 324   } else if (theMessage->eventID() == kOpFinishEvent || theMessage->eventID() == kOpAbortEvent ||
 325       theMessage->eventID() == kOpStartEvent) {
 326     myIsPreviewBlocked = false;
 327
 328     if (theMessage->eventID() == kOpFinishEvent) {
 329       myIsFinish = true;
 330       // add features that wait for finish as modified
 331       std::map<std::shared_ptr<ModelAPI_Feature>, std::set<std::shared_ptr<ModelAPI_Feature> > >::
 332         iterator aFeature = myProcessOnFinish.begin();
 333       for(; aFeature != myProcessOnFinish.end(); aFeature++) {
 334         if (aFeature->first->data()->isValid()) {// there may be already removed while wait
 335           if (aFeature->second.empty()) {
 336             addModified(aFeature->first, FeaturePtr());
 337             continue;
 338           }
 339           std::set<std::shared_ptr<ModelAPI_Feature> >::iterator aReasons;
 340           for(aReasons = aFeature->second.begin(); aReasons != aFeature->second.end(); aReasons++) {
 341             addModified(aFeature->first, *aReasons);
 342           }
 343         }
 344       }
 345       myIsFinish = false;
 346     }
 347     // processed features must be only on finish, so clear anyway (to avoid reimport on load)
 348     myProcessOnFinish.clear();
 349
 350     // #2156: current must be sketch, left after the macro execution
 351     DocumentPtr anActiveDoc = ModelAPI_Session::get()->activeDocument();
 352     FeaturePtr aCurrent;
 353     if (anActiveDoc.get())
 354       aCurrent = anActiveDoc->currentFeature(false);
 355
 356     if (!(theMessage->eventID() == kOpStartEvent)) {
 357       processFeatures(false);
 358     }
 359
 360     if (anActiveDoc.get() && aCurrent.get() && aCurrent->data()->isValid()) {
 361       if (anActiveDoc->currentFeature(false) != aCurrent)
 362         anActiveDoc->setCurrentFeature(aCurrent, false); // #2156 make the current feature back
 363     }
 364
 365
 366     // remove all macros before clearing all created
 367     std::set<FeaturePtr>::iterator anUpdatedIter = myWaitForFinish.begin();
 368     while(anUpdatedIter != myWaitForFinish.end()) {
 369       FeaturePtr aFeature = std::dynamic_pointer_cast<ModelAPI_Feature>(*anUpdatedIter);
 370       if (aFeature.get()) {
 371         // remove macro on finish
 372         if (aFeature->isMacro()) {
 373           aFeature->document()->removeFeature(aFeature);
 374           myWaitForFinish.erase(aFeature);
 375         }
 376         // to avoid the map update problems on "remove"
 377         if (myWaitForFinish.find(aFeature) == myWaitForFinish.end()) {
 378           anUpdatedIter = myWaitForFinish.begin();
 379         } else {
 380           anUpdatedIter++;
 381         }
 382       } else {
 383         anUpdatedIter++;
 384       }
 385     }
 386     // the redisplay signal should be flushed in order
 387     // to erase the feature presentation in the viewer
 388     // if should be done after removeFeature() of document,
 389     // by this reason, upper processFeatures() do not perform this flush
 390     Events_Loop::loop()->flush(kRedisplayEvent);
 391
 392     // in the end of transaction everything is updated, so clear the old objects
 393     myIsParamUpdated = false;
 394     myWaitForFinish.clear();
 395   } else if (theMessage->eventID() == kReorderEvent) {
 396     std::shared_ptr<ModelAPI_OrderUpdatedMessage> aMsg =
 397       std::dynamic_pointer_cast<ModelAPI_OrderUpdatedMessage>(theMessage);
 398     if (aMsg->reordered().get())
 399       addModified(aMsg->reordered(), aMsg->reordered()); // to update all attributes
 400   }
 401 }
 402
 403 void Model_Update::processFeatures(const bool theFlushRedisplay)
 404 {
 405    // perform update of everything if it is not performed right now or any preview is blocked
 406   if (!myIsProcessed && !myIsPreviewBlocked) {
 407     myIsProcessed = true;
 408     #ifdef DEB_UPDATE
 409       std::cout<<"****** Start processing"<<std::endl;
 410     #endif
 411
 412     while(!myModified.empty()) {
 413       processFeature(myModified.begin()->first);
 414     }
 415     myIsProcessed = false;
 416
 417     // to update the object browser if something is updated/created during executions
 418     static Events_Loop* aLoop = Events_Loop::loop();
 419     static const Events_ID kCreatedEvent= aLoop->eventByName(EVENT_OBJECT_CREATED);
 420     aLoop->flush(kCreatedEvent);
 421     static const Events_ID kUpdatedEvent = aLoop->eventByName(EVENT_OBJECT_UPDATED);
 422     aLoop->flush(kUpdatedEvent);
 423
 424     // flush to update display
 425     if (theFlushRedisplay) {
 426       static Events_ID EVENT_DISP = aLoop->eventByName(EVENT_OBJECT_TO_REDISPLAY);
 427       aLoop->flush(EVENT_DISP);
 428     }
 429     #ifdef DEB_UPDATE
 430       std::cout<<"****** End processing"<<std::endl;
 431     #endif
 432     myProcessed.clear();
 433   }
 434 }
 435
 436 // collects all the feautres this feature depends on: reasons
 437 static void allReasons(FeaturePtr theFeature, std::set<FeaturePtr>& theReasons) {
 438   std::list<std::pair<std::string, std::list<std::shared_ptr<ModelAPI_Object> > > > aDeps;
 439   theFeature->data()->referencesToObjects(aDeps);
 440   std::list<std::pair<std::string, std::list<std::shared_ptr<ModelAPI_Object> > > >::iterator
 441     anAttrsIter = aDeps.begin();
 442   for(; anAttrsIter != aDeps.end(); anAttrsIter++) {
 443     if (theFeature->attribute(anAttrsIter->first)->isArgument()) {
 444       std::list<std::shared_ptr<ModelAPI_Object> >::iterator aDepIter = anAttrsIter->second.begin();
 445       for(; aDepIter != anAttrsIter->second.end(); aDepIter++) {
 446         FeaturePtr aDepFeat = std::dynamic_pointer_cast<ModelAPI_Feature>(*aDepIter);
 447         if (!aDepFeat.get()) { // so, it depends on the result and process the feature owner of it
 448           ResultPtr aDepRes = std::dynamic_pointer_cast<ModelAPI_Result>(*aDepIter);
 449           if (aDepRes.get()) {
 450             aDepFeat = (*aDepIter)->document()->feature(aDepRes);
 451           }
 452         }
 453         if (aDepFeat.get() && aDepFeat->data()->isValid()) {
 454           theReasons.insert(aDepFeat);
 455         }
 456       }
 457     }
 458   }
 459   if (theFeature->getKind() == "Part") {
 460     // part is not depended on its subs directly, but subs must be iterated anyway
 461     CompositeFeaturePtr aPart = std::dynamic_pointer_cast<ModelAPI_CompositeFeature>(theFeature);
 462     int aNum = aPart->numberOfSubs();
 463     for(int a = 0; a < aNum; a++) {
 464       FeaturePtr aSub = aPart->subFeature(a);
 465       if (aSub.get() && aSub->data()->isValid()) {
 466         theReasons.insert(aSub);
 467       }
 468     }
 469   }
 470 }
 471
 472 bool Model_Update::processFeature(FeaturePtr theFeature)
 473 {
 474   static ModelAPI_ValidatorsFactory* aFactory = ModelAPI_Session::get()->validators();
 475
 476   if (!theFeature->data()->isValid()) { // deleted feature, just remove from all containers
 477     if (myModified.find(theFeature) != myModified.end())
 478       myModified.erase(theFeature);
 479     return false;
 480   }
 481
 482   if (theFeature->isPersistentResult()) {
 483     if (!std::dynamic_pointer_cast<Model_Document>((theFeature)->document())->executeFeatures())
 484       return false;
 485   }
 486
 487   if (myProcessed.find(theFeature) == myProcessed.end()) {
 488     myProcessed[theFeature] = 0;
 489   } else {
 490     int aCount = myProcessed[theFeature];
 491     if (aCount > 100) {
 492       // too many repetition of processing (in VS it may crash on 330 with stack overflow)
 493       Events_InfoMessage("Model_Update",
 494         "Feature '%1' is updated in infinitive loop").arg(theFeature->data()->name()).send();
 495       // to stop iteration
 496       myModified.clear();
 497       return false;
 498     }
 499     myProcessed[theFeature] = aCount + 1;
 500   }
 501
 502   // check this feature is not yet checked or processed
 503   bool aIsModified = myModified.find(theFeature) != myModified.end();
 504   if (!aIsModified && myIsFinish) { // get info about the modification for features without preview
 505     if (theFeature->data()->execState() == ModelAPI_StateMustBeUpdated) {
 506       aIsModified = true;
 507       std::set<std::shared_ptr<ModelAPI_Feature> > aNewSet;
 508       // contains itself, so, we don't know which was the reason and the reason is any
 509       aNewSet.insert(theFeature);
 510       myModified[theFeature] = aNewSet;
 511     }
 512   }
 513
 514 #ifdef DEB_UPDATE
 515     std::cout<<"* Process feature "<<theFeature->name()<<std::endl;
 516 #endif
 517
 518   // update the sketch plane before the sketch sub-elements are recomputed
 519   // (otherwise sketch will update plane, modify subs, after executed, but with old subs edges)
 520   if (aIsModified && theFeature->getKind() == "Sketch") {
 521 #ifdef DEB_UPDATE
 522     std::cout<<"****** Update sketch args "<<theFeature->name()<<std::endl;
 523 #endif
 524     AttributeSelectionPtr anExtSel = theFeature->selection("External");
 525     if (anExtSel.get()) {
 526       ResultPtr aContext = anExtSel->context();
 527       if (aContext.get() && aContext->document().get()) {
 528         FeaturePtr anExtBase = aContext->document()->feature(aContext);
 529         if (anExtBase.get()) {
 530           processFeature(anExtBase);
 531         }
 532       }
 533     }
 534     std::shared_ptr<GeomAPI_Shape> aShapeBefore = anExtSel->value();
 535     if (!aShapeBefore.get() && anExtSel->context()) aShapeBefore = anExtSel->context()->shape();
 536     updateArguments(theFeature);
 537     std::shared_ptr<GeomAPI_Shape> aShapeAfter = anExtSel->value();
 538     if (!aShapeAfter.get() && anExtSel->context()) aShapeAfter = anExtSel->context()->shape();
 539     // if selected plane is changed, try to re-take external references of all subs of the sketch
 540     if (aShapeBefore.get() && !aShapeBefore->isEqual(aShapeAfter)) {
 541       std::set<FeaturePtr> aWholeR;
 542       allReasons(theFeature, aWholeR);
 543       std::set<FeaturePtr>::iterator aRIter = aWholeR.begin();
 544       for(; aRIter != aWholeR.end(); aRIter++) {
 545         if ((*aRIter)->data()->selection("External"))
 546           (*aRIter)->attributeChanged("External");
 547       }
 548     }
 549   }
 550
 551   if (!aIsModified) { // no modification is needed
 552     return false;
 553   }
 554
 555   // evaluate parameter before the sub-elements update:
 556   // it updates dependencies on evaluation (#1085)
 557   if (theFeature->getKind() == "Parameter") {
 558     theFeature->execute();
 559   }
 560
 561   bool isReferencedInvalid = false;
 562   // check all features this feature depended on (recursive call of updateFeature)
 563   std::set<FeaturePtr>& aReasons = myModified[theFeature];
 564   bool allSubsUsed = aReasons.find(theFeature) != aReasons.end();
 565   if (allSubsUsed) {
 566     // add all subs in aReasons and temporary remove "theFeature" to avoid processing itself
 567     allReasons(theFeature, aReasons);
 568     aReasons.erase(theFeature);
 569   }
 570   // take reasons one by one (they may be added during the feature process
 571   // (circle by the radius of sketch)
 572   std::set<FeaturePtr> aProcessedReasons;
 573   while(!aReasons.empty()) {
 574     FeaturePtr aReason = *(aReasons.begin());
 575 #ifdef DEB_UPDATE
 576     //cout<<theFeature->name()<<" process next reason "<<aReason->name()<<endl;
 577 #endif
 578     if (aReason != theFeature && (aReason)->data()->isValid()) {
 579       if (processFeature(aReason))
 580         aIsModified = true;
 581       // check validity of aReason once again because it may be removed by dependent feature
 582       // (e.g. by SketchPlugin_IntersectionPoint)
 583       if (!aReason->data()->isValid() ||
 584           aReason->data()->execState() == ModelAPI_StateInvalidArgument)
 585         isReferencedInvalid = true;
 586     }
 587     // searching for the next not used reason
 588     aProcessedReasons.insert(aReason);
 589     aReasons.erase(aReason);
 590   }
 591   // restore the modified reasons: they will be used in the update of arguments
 592   if (allSubsUsed) { // restore theFeature in this set
 593     aProcessedReasons.insert(theFeature);
 594   }
 595   myModified[theFeature] = aProcessedReasons;
 596
 597   // do not execute the composite that contains the current
 598   bool isPostponedMain = false;
 599   CompositeFeaturePtr aCompos = std::dynamic_pointer_cast<ModelAPI_CompositeFeature>(theFeature);
 600   if (theFeature->getKind() == "ExtrusionSketch" && aCompos.get()) {
 601     CompositeFeaturePtr aCurrentOwner =
 602       ModelAPI_Tools::compositeOwner(theFeature->document()->currentFeature(false));
 603     isPostponedMain = aCurrentOwner.get() && aCompos->isSub(aCurrentOwner);
 604   } else if (theFeature->getKind() == "Sketch" &&
 605     std::dynamic_pointer_cast<Model_Document>((theFeature)->document())->executeFeatures()) {
 606     // send event that sketch is prepared to be recomputed
 607     static Events_ID anID = Events_Loop::eventByName("SketchPrepared");
 608     std::shared_ptr<Events_Message> aMsg(new Events_Message(anID, this));
 609     Events_Loop* aLoop = Events_Loop::loop();
 610     // in case it is finish operation, flush for the sketch other events (#2450)
 611     aLoop->flush(aLoop->eventByName(EVENT_OBJECT_UPDATED));
 612     aLoop->send(aMsg);
 613     // check that sub-elements of sketch are updated => sketch must be re-processed
 614     std::set<FeaturePtr> aWholeR;
 615     allReasons(theFeature, aWholeR);
 616     std::set<FeaturePtr>::iterator aRIter = aWholeR.begin();
 617     for(; aRIter != aWholeR.end(); aRIter++) {
 618       if (myModified.find(*aRIter) != myModified.end()) {
 619         processFeature(theFeature);
 620         return true;
 621       }
 622     }
 623   }
 624
 625 #ifdef DEB_UPDATE
 626   std::cout<<"Update args "<<theFeature->name()<<std::endl;
 627 #endif
 628   // TestImport.py : after arguments are updated, theFeature may be removed
 629   if (!theFeature->data()->isValid())
 630     return false;
 631   // Update selection and parameters attributes first, before sub-features analysis (sketch plane).
 632   updateArguments(theFeature);
 633
 634   // add this feature to the processed right now to be able remove it from this list on
 635   // update signal during this feature execution
 636   myModified.erase(theFeature);
 637   if (myNotPersistentRefs.find(theFeature) != myNotPersistentRefs.end())
 638     myNotPersistentRefs.erase(theFeature);
 639   if (theFeature->data()->execState() == ModelAPI_StateMustBeUpdated)
 640     theFeature->data()->execState(ModelAPI_StateDone);
 641
 642   // this checking must be after the composite feature sub-elements processing:
 643   // composite feature status may depend on it's subelements
 644   if ((theFeature->data()->execState() == ModelAPI_StateInvalidArgument || isReferencedInvalid) &&
 645     theFeature->getKind() != "Part") {
 646       // don't disable Part because it will make disabled all the features
 647       // (performance and problems with the current feature)
 648   #ifdef DEB_UPDATE
 649     std::cout<<"Invalid args "<<theFeature->name()<<std::endl;
 650   #endif
 651     theFeature->eraseResults(false);
 652     redisplayWithResults(theFeature, ModelAPI_StateInvalidArgument); // result also must be updated
 653     return true; // so, feature is modified (results are erased)
 654   }
 655
 656   // execute feature if it must be updated
 657   ModelAPI_ExecState aState = theFeature->data()->execState();
 658   if (aFactory->validate(theFeature)) {
 659     if (!isPostponedMain) {
 660       executeFeature(theFeature);
 661     }
 662   } else {
 663     #ifdef DEB_UPDATE
 664       std::cout<<"Feature is not valid, erase results "<<theFeature->name()<<std::endl;
 665     #endif
 666     theFeature->eraseResults(false);
 667     redisplayWithResults(theFeature, ModelAPI_StateInvalidArgument); // result also must be updated
 668   }
 669   return true;
 670 }
 671
 672 void Model_Update::redisplayWithResults(
 673   FeaturePtr theFeature, const ModelAPI_ExecState theState, bool theUpdateState)
 674 {
 675   // make updated and redisplay all results
 676   static Events_ID EVENT_DISP = Events_Loop::loop()->eventByName(EVENT_OBJECT_TO_REDISPLAY);
 677
 678   std::list<ResultPtr> allResults;
 679   ModelAPI_Tools::allResults(theFeature, allResults);
 680   std::list<ResultPtr>::iterator aRIter = allResults.begin();
 681   for (; aRIter != allResults.cend(); aRIter++) {
 682     std::shared_ptr<ModelAPI_Result> aRes = *aRIter;
 683     if (!aRes->isDisabled()) {
 684       // update state only for enabled results
 685       // (Placement Result Part may make the original Part Result as invalid)
 686       if (theUpdateState)
 687         aRes->data()->execState(theState);
 688     }
 689     if (theFeature->data()->updateID() > aRes->data()->updateID()) {
 690       aRes->data()->setUpdateID(theFeature->data()->updateID());
 691     }
 692     ModelAPI_EventCreator::get()->sendUpdated(aRes, EVENT_DISP);
 693   }
 694   // to redisplay "presentable" feature (for ex. distance constraint)
 695   ModelAPI_EventCreator::get()->sendUpdated(theFeature, EVENT_DISP);
 696   if (theUpdateState)
 697     theFeature->data()->execState(theState);
 698 }
 699
 700 /// Updates the state by the referenced object: if something bad with it, set state for this one
 701 ModelAPI_ExecState stateByReference(ObjectPtr theTarget, const ModelAPI_ExecState theCurrent)
 702 {
 703   if (theTarget) {
 704     ModelAPI_ExecState aRefState = theTarget->data()->execState();
 705     if (aRefState == ModelAPI_StateMustBeUpdated) {
 706       if (theCurrent == ModelAPI_StateDone)
 707         return ModelAPI_StateMustBeUpdated;
 708     } else if (aRefState != ModelAPI_StateDone) {
 709       return ModelAPI_StateInvalidArgument;
 710     }
 711   }
 712   return theCurrent;
 713 }
 714
 715 void Model_Update::updateArguments(FeaturePtr theFeature) {
 716   // perform this method also for disabled features: to make "not done" state for
 717   // features referenced to the active and modified features
 718   static ModelAPI_ValidatorsFactory* aFactory = ModelAPI_Session::get()->validators();
 719
 720   ModelAPI_ExecState aState = theFeature->data()->execState();
 721   if (aState == ModelAPI_StateExecFailed) { // try again failed feature: issue 577
 722     aState = ModelAPI_StateMustBeUpdated;
 723   }
 724   if (aState == ModelAPI_StateInvalidArgument) // a chance to be corrected
 725     aState = ModelAPI_StateMustBeUpdated;
 726   // check the parameters state
 727   // Integer
 728   {
 729     std::list<AttributePtr> anAttrinbutes =
 730       theFeature->data()->attributes(ModelAPI_AttributeInteger::typeId());
 731     std::list<AttributePtr>::iterator anIter = anAttrinbutes.begin();
 732     for(; anIter != anAttrinbutes.end(); anIter++) {
 733       AttributeIntegerPtr anAttribute =
 734         std::dynamic_pointer_cast<ModelAPI_AttributeInteger>(*anIter);
 735       if (anAttribute.get() && !anAttribute->text().empty()) {
 736         if (myIsParamUpdated) {
 737           ModelAPI_AttributeEvalMessage::send(anAttribute, this);
 738         }
 739         if (anAttribute->expressionInvalid()) {
 740           aState = ModelAPI_StateInvalidArgument;
 741         }
 742       }
 743     }
 744   }
 745   // Double
 746   {
 747     std::list<AttributePtr> aDoubles =
 748       theFeature->data()->attributes(ModelAPI_AttributeDouble::typeId());
 749     std::list<AttributePtr>::iterator aDoubleIter = aDoubles.begin();
 750     for(; aDoubleIter != aDoubles.end(); aDoubleIter++) {
 751       AttributeDoublePtr aDouble =
 752         std::dynamic_pointer_cast<ModelAPI_AttributeDouble>(*aDoubleIter);
 753       if (aDouble.get() && !aDouble->text().empty()) {
 754         if (myIsParamUpdated) {
 755           ModelAPI_AttributeEvalMessage::send(aDouble, this);
 756         }
 757         if (aDouble->expressionInvalid()) {
 758           aState = ModelAPI_StateInvalidArgument;
 759         }
 760       }
 761     }
 762   }
 763   // Point
 764   {
 765     std::list<AttributePtr> anAttributes =
 766       theFeature->data()->attributes(GeomDataAPI_Point::typeId());
 767     std::list<AttributePtr>::iterator anIter = anAttributes.begin();
 768     for(; anIter != anAttributes.end(); anIter++) {
 769       AttributePointPtr aPointAttribute =
 770         std::dynamic_pointer_cast<GeomDataAPI_Point>(*anIter);
 771       if (aPointAttribute.get() && (!aPointAttribute->textX().empty() ||
 772           !aPointAttribute->textY().empty() || !aPointAttribute->textZ().empty())) {
 773         if (myIsParamUpdated) {
 774           ModelAPI_AttributeEvalMessage::send(aPointAttribute, this);
 775         }
 776         if ((!aPointAttribute->textX().empty() && aPointAttribute->expressionInvalid(0)) ||
 777           (!aPointAttribute->textY().empty() && aPointAttribute->expressionInvalid(1)) ||
 778           (!aPointAttribute->textZ().empty() && aPointAttribute->expressionInvalid(2)))
 779           aState = ModelAPI_StateInvalidArgument;
 780       }
 781     }
 782   }
 783   // Point2D
 784   {
 785     std::list<AttributePtr> anAttributes =
 786       theFeature->data()->attributes(GeomDataAPI_Point2D::typeId());
 787     std::list<AttributePtr>::iterator anIter = anAttributes.begin();
 788     for(; anIter != anAttributes.end(); anIter++) {
 789       AttributePoint2DPtr aPoint2DAttribute =
 790         std::dynamic_pointer_cast<GeomDataAPI_Point2D>(*anIter);
 791       if (aPoint2DAttribute.get()) {
 792         if (myIsParamUpdated && (!aPoint2DAttribute->textX().empty() ||
 793             !aPoint2DAttribute->textY().empty())) {
 794           ModelAPI_AttributeEvalMessage::send(aPoint2DAttribute, this);
 795         }
 796         if ((!aPoint2DAttribute->textX().empty() && aPoint2DAttribute->expressionInvalid(0)) ||
 797           (!aPoint2DAttribute->textY().empty() && aPoint2DAttribute->expressionInvalid(1)))
 798           aState = ModelAPI_StateInvalidArgument;
 799       }
 800     }
 801   }
 802   // update the selection attributes if any
 803   std::list<AttributePtr> aRefs =
 804     theFeature->data()->attributes(ModelAPI_AttributeSelection::typeId());
 805   std::list<AttributePtr>::iterator aRefsIter = aRefs.begin();
 806   for (; aRefsIter != aRefs.end(); aRefsIter++) {
 807     std::shared_ptr<ModelAPI_AttributeSelection> aSel =
 808       std::dynamic_pointer_cast<ModelAPI_AttributeSelection>(*aRefsIter);
 809     ObjectPtr aContext = aSel->context();
 810     // update argument only if the referenced object is ready to use
 811     if (aContext.get() && !aContext->isDisabled()) {
 812       if (isReason(theFeature, aContext)) {
 813         if (!aSel->update()) { // this must be done on execution since it may be long operation
 814           bool isObligatory = !aFactory->isNotObligatory(
 815             theFeature->getKind(), theFeature->data()->id(aSel)) &&
 816             aFactory->isCase(theFeature, theFeature->data()->id(aSel));
 817           if (isObligatory)
 818             aState = ModelAPI_StateInvalidArgument;
 819         }
 820       }
 821     } else if (aContext.get()) {
 822       // here it may be not obligatory, but if the reference is wrong, it should not be correct
 823       bool isObligatory = aFactory->isCase(theFeature, theFeature->data()->id(aSel));
 824       if (isObligatory)
 825         aState = ModelAPI_StateInvalidArgument;
 826     }
 827   }
 828   // update the selection list attributes if any
 829   aRefs = theFeature->data()->attributes(ModelAPI_AttributeSelectionList::typeId());
 830   for (aRefsIter = aRefs.begin(); aRefsIter != aRefs.end(); aRefsIter++) {
 831     std::shared_ptr<ModelAPI_AttributeSelectionList> aSel =
 832       std::dynamic_pointer_cast<ModelAPI_AttributeSelectionList>(*aRefsIter);
 833     for(int a = aSel->size() - 1; a >= 0; a--) {
 834       std::shared_ptr<ModelAPI_AttributeSelection> aSelAttr =
 835         std::dynamic_pointer_cast<ModelAPI_AttributeSelection>(aSel->value(a));
 836       if (aSelAttr) {
 837         ObjectPtr aContext = aSelAttr->context();
 838         // update argument only if the referenced object is ready to use
 839         if (aContext.get() && !aContext->isDisabled() && !aSelAttr->isInvalid()) {
 840           if (isReason(theFeature, aContext)) {
 841             if (!aSelAttr->update()) {
 842               bool isObligatory = !aFactory->isNotObligatory(
 843                 theFeature->getKind(), theFeature->data()->id(aSel)) &&
 844                 aFactory->isCase(theFeature, theFeature->data()->id(aSel));
 845               if (isObligatory)
 846                 aState = ModelAPI_StateInvalidArgument;
 847             }
 848           }
 849         } else if (aContext.get() || aSelAttr->isInvalid()) {
 850           // here it may be not obligatory, but if the reference is wrong, it should not be correct
 851           bool isObligatory = aFactory->isCase(theFeature, theFeature->data()->id(aSel));
 852           if (isObligatory)
 853             aState = ModelAPI_StateInvalidArgument;
 854         }
 855       }
 856     }
 857   }
 858
 859   if (aState != ModelAPI_StateDone)
 860     theFeature->data()->execState(aState);
 861 }
 862
 863 bool Model_Update::isReason(std::shared_ptr<ModelAPI_Feature>& theFeature,
 864      std::shared_ptr<ModelAPI_Object> theReason)
 865 {
 866   std::map<std::shared_ptr<ModelAPI_Feature>, std::set<std::shared_ptr<ModelAPI_Feature> > >
 867     ::iterator aReasonsIt = myModified.find(theFeature);
 868   if (aReasonsIt != myModified.end()) {
 869     if (aReasonsIt->second.find(theFeature) != aReasonsIt->second.end())
 870       return true; // any is reason if it contains itself
 871     FeaturePtr aReasFeat = std::dynamic_pointer_cast<ModelAPI_Feature>(theReason);
 872     if (!aReasFeat.get()) { // try to get feature of this result
 873       ResultPtr aReasRes = std::dynamic_pointer_cast<ModelAPI_Result>(theReason);
 874       if (aReasRes.get())
 875         aReasFeat = theReason->document()->feature(aReasRes);
 876     }
 877     if (aReasonsIt->second.find(aReasFeat) != aReasonsIt->second.end())
 878       return true;
 879   }
 880   // another try: postponed modification by not-persistences
 881   std::map<std::shared_ptr<ModelAPI_Feature>, std::set<std::shared_ptr<ModelAPI_Feature> > >
 882     ::iterator aNotPersist = myNotPersistentRefs.find(theFeature);
 883   if (aNotPersist != myNotPersistentRefs.end()) {
 884     FeaturePtr aReasFeat = std::dynamic_pointer_cast<ModelAPI_Feature>(theReason);
 885     if (!aReasFeat.get()) { // try to get feature of this result
 886       ResultPtr aReasRes = std::dynamic_pointer_cast<ModelAPI_Result>(theReason);
 887       if (aReasRes.get())
 888         aReasFeat = theReason->document()->feature(aReasRes);
 889     }
 890     if (aNotPersist->second.find(aReasFeat) != aNotPersist->second.end())
 891       return true;
 892   }
 893
 894   // this case only for not-previewed items update state, nothing is changed in args for it
 895   return false;
 896 }
 897
 898 void Model_Update::executeFeature(FeaturePtr theFeature)
 899 {
 900 #ifdef DEB_UPDATE
 901   std::cout<<"Execute Feature "<<theFeature->name()<<std::endl;
 902 #endif
 903   // execute in try-catch to avoid internal problems of the feature
 904   ModelAPI_ExecState aState = ModelAPI_StateDone;
 905   theFeature->data()->execState(ModelAPI_StateDone);
 906   try {
 907     theFeature->execute();
 908     if (theFeature->data()->execState() != ModelAPI_StateDone) {
 909       aState = ModelAPI_StateExecFailed;
 910     } else {
 911       aState = ModelAPI_StateDone;
 912     }
 913   } catch(...) {
 914     aState = ModelAPI_StateExecFailed;
 915     Events_InfoMessage("Model_Update",
 916       "Feature %1 has failed during the execution").arg(theFeature->getKind()).send();
 917   }
 918   // The macro feature has to be deleted in any case even its execution is failed
 919   myWaitForFinish.insert(theFeature);
 920   if (aState != ModelAPI_StateDone) {
 921     theFeature->eraseResults(false);
 922   }
 923   theFeature->data()->setUpdateID(ModelAPI_Session::get()->transactionID());
 924   redisplayWithResults(theFeature, aState);
 925 }
 926
 927 void Model_Update::updateStability(void* theSender)
 928 {
 929   static ModelAPI_ValidatorsFactory* aFactory = ModelAPI_Session::get()->validators();
 930   if (theSender) {
 931     bool added = false; // object may be was crated
 932     ModelAPI_Object* aSender = static_cast<ModelAPI_Object*>(theSender);
 933     if (aSender && aSender->document()) {
 934       FeaturePtr aFeatureSender =
 935         std::dynamic_pointer_cast<ModelAPI_Feature>(aSender->data()->owner());
 936       if (aFeatureSender.get()) {
 937         Model_Objects* aDocObjects =
 938           std::dynamic_pointer_cast<Model_Document>(aSender->document())->objects();
 939         if (aDocObjects) {
 940           //aDocObjects->synchronizeBackRefs();
 941           // remove or add all concealment refs from this feature
 942           std::list<std::pair<std::string, std::list<ObjectPtr> > > aRefs;
 943           aSender->data()->referencesToObjects(aRefs);
 944           std::list<std::pair<std::string, std::list<ObjectPtr> > >::iterator
 945             aRefIt = aRefs.begin();
 946           for(; aRefIt != aRefs.end(); aRefIt++) {
 947             if (!aFactory->isConcealed(aFeatureSender->getKind(), aRefIt->first))
 948               // take into account only concealed references
 949               // (do not remove the sketch constraint and the edge on constraint edit)
 950               continue;
 951             std::list<ObjectPtr>& aRefFeaturesList = aRefIt->second;
 952             std::list<ObjectPtr>::iterator aReferenced = aRefFeaturesList.begin();
 953             for(; aReferenced != aRefFeaturesList.end(); aReferenced++) {
 954                // stability is only on results: feature to feature reference mean nested
 955               // features, that will remove nesting references
 956               if (aReferenced->get() && (*aReferenced)->data()->isValid() &&
 957                 (*aReferenced)->groupName() != ModelAPI_Feature::group()) {
 958                 std::shared_ptr<Model_Data> aData =
 959                   std::dynamic_pointer_cast<Model_Data>((*aReferenced)->data());
 960                 if (aFeatureSender->isStable()) {
 961                   aData->addBackReference(aFeatureSender, aRefIt->first);
 962                 } else {
 963                   aData->removeBackReference(aFeatureSender, aRefIt->first);
 964                   added = true; // remove of concealment may be caused creation of some result
 965                 }
 966               }
 967             }
 968           }
 969         }
 970       }
 971     }
 972     if (added) {
 973       static Events_Loop* aLoop = Events_Loop::loop();
 974       static Events_ID kEventCreated = aLoop->eventByName(EVENT_OBJECT_CREATED);
 975       aLoop->flush(kEventCreated);
 976     }
 977   }
 978 }
 979
 980 void Model_Update::updateSelection(const std::set<std::shared_ptr<ModelAPI_Object> >& theObjects)
 981 {
 982   std::set<std::shared_ptr<ModelAPI_Object> >::iterator anObj = theObjects.begin();
 983   for(; anObj != theObjects.end(); anObj++) {
 984     std::list<AttributePtr> aRefs =
 985       (*anObj)->data()->attributes(ModelAPI_AttributeSelection::typeId());
 986     std::list<AttributePtr>::iterator aRefsIter = aRefs.begin();
 987     for (; aRefsIter != aRefs.end(); aRefsIter++) {
 988       std::shared_ptr<Model_AttributeSelection> aSel =
 989         std::dynamic_pointer_cast<Model_AttributeSelection>(*aRefsIter);
 990       aSel->updateInHistory();
 991     }
 992     // update the selection list attributes if any
 993     aRefs = (*anObj)->data()->attributes(ModelAPI_AttributeSelectionList::typeId());
 994     for (aRefsIter = aRefs.begin(); aRefsIter != aRefs.end(); aRefsIter++) {
 995       std::shared_ptr<ModelAPI_AttributeSelectionList> aSel =
 996         std::dynamic_pointer_cast<ModelAPI_AttributeSelectionList>(*aRefsIter);
 997       for(int a = aSel->size() - 1; a >= 0; a--) {
 998         std::shared_ptr<Model_AttributeSelection> aSelAttr =
 999           std::dynamic_pointer_cast<Model_AttributeSelection>(aSel->value(a));
1000         if (aSelAttr.get())
1001           aSelAttr->updateInHistory();
1002       }
1003     }
1004   }
1005 }