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   myUpdateBlocked = false;
  84 }
  85
  86 bool Model_Update::addModified(FeaturePtr theFeature, FeaturePtr theReason) {
  87
  88   if (!theFeature->data()->isValid())
  89     return false; // delete an extrusion created on the sketch
  90
  91
  92   bool isNotExecuted = theFeature->isPersistentResult() &&
  93     !std::dynamic_pointer_cast<Model_Document>((theFeature)->document())->executeFeatures();
  94   if (isNotExecuted) {
  95     redisplayWithResults(theFeature, ModelAPI_StateNothing, false); // redisplay even not executed
  96     if (!theReason.get()) // no reason => no construction reason
  97       return false;
  98     if (myNotPersistentRefs.find(theFeature) == myNotPersistentRefs.end()) {
  99       myNotPersistentRefs[theFeature].insert(theReason);
 100     } else {
 101       std::set<std::shared_ptr<ModelAPI_Feature> > aNewSet;
 102       aNewSet.insert(theReason);
 103       myNotPersistentRefs[theFeature] = aNewSet;
 104     }
 105     return false;
 106   }
 107
 108   // update arguments for "apply button" state change
 109   if ((!theFeature->isPreviewNeeded() && !myIsFinish) || myIsPreviewBlocked || myUpdateBlocked) {
 110     if (theReason.get())
 111       myProcessOnFinish[theFeature].insert(theReason);
 112     else if (myProcessOnFinish.find(theFeature) == myProcessOnFinish.end())
 113       myProcessOnFinish[theFeature] = std::set<std::shared_ptr<ModelAPI_Feature> >();
 114 #ifdef DEB_UPDATE
 115       std::cout<<"*** Add process on finish "<<theFeature->name()<<std::endl;
 116 #endif
 117     // keeps the currently updated features to avoid infinitive cycling here: where feature on
 118     // "updateArguments" sends "updated" (in selection attribute) and goes here again
 119     static std::set<FeaturePtr> aCurrentlyUpdated;
 120     if (aCurrentlyUpdated.find(theFeature) == aCurrentlyUpdated.end()) {
 121       aCurrentlyUpdated.insert(theFeature);
 122       updateArguments(theFeature);
 123       aCurrentlyUpdated.erase(theFeature);
 124     }
 125     // make it without conditions otherwise the apply button may have a bad state
 126     theFeature->data()->execState(ModelAPI_StateDone);
 127     static ModelAPI_ValidatorsFactory* aFactory = ModelAPI_Session::get()->validators();
 128      // need to be validated to update the "Apply" state if not previewed
 129     aFactory->validate(theFeature);
 130
 131     // to redisplay split's arguments presentation, even result is not computed
 132     if (!theFeature->isPreviewNeeded()) {
 133       static Events_Loop* aLoop = Events_Loop::loop();
 134       static const Events_ID kRedisplayEvent = aLoop->eventByName(EVENT_OBJECT_TO_REDISPLAY);
 135       ModelAPI_EventCreator::get()->sendUpdated(theFeature, kRedisplayEvent);
 136       aLoop->flush(kRedisplayEvent);
 137     }
 138
 139     if (!myIsPreviewBlocked && !myUpdateBlocked)
 140       return true;
 141   }
 142   if (myModified.find(theFeature) != myModified.end()) {
 143     if (theReason.get()) {
 144 #ifdef DEB_UPDATE
 145       //std::cout<<"*** Add already modified "
 146       //   <<theFeature->name()<<" reason "<<theReason->name()<<std::endl;
 147 #endif
 148       myModified[theFeature].insert(theReason);
 149     }
 150     return true;
 151   }
 152   // do not add the disabled, but possibly the sub-elements are not disabled
 153   bool aIsDisabled = theFeature->isDisabled();
 154   if (!aIsDisabled) {
 155     std::set<std::shared_ptr<ModelAPI_Feature> > aNewSet;
 156     if (theFeature->data()->execState() == ModelAPI_StateMustBeUpdated ||
 157         theFeature->data()->execState() == ModelAPI_StateInvalidArgument || // issue 1519
 158         theFeature->data()->execState() == ModelAPI_StateExecFailed) {
 159       // do not forget that in this case all were the reasons
 160       aNewSet.insert(theFeature);
 161     } else {
 162       if (theReason.get())
 163         aNewSet.insert(theReason);
 164     }
 165     myModified[theFeature] = aNewSet;
 166 #ifdef DEB_UPDATE
 167     if (theReason.get()) {
 168       //std::cout<<"*** Add modified "<<theFeature->name()
 169       //  <<" reason "<<theReason->name()<<std::endl;
 170     } else {
 171       //std::cout<<"*** Add modified "<<theFeature->name()<<std::endl;
 172     }
 173 #endif
 174   } else { // will be updated during the finish of the operation, or when it becomes enabled
 175     if (theFeature->data()->execState() == ModelAPI_StateDone ||
 176         theFeature->data()->execState() == ModelAPI_StateExecFailed) // fix issue 1819
 177       theFeature->data()->execState(ModelAPI_StateMustBeUpdated);
 178     else
 179       return true; // do not need iteration deeply if it is already marked as modified or so
 180 #ifdef DEB_UPDATE
 181     //std::cout<<"*** Set modified state "<<theFeature->name()<<std::endl;
 182 #endif
 183   }
 184   // clear processed and fill modified recursively
 185   const std::set<std::shared_ptr<ModelAPI_Attribute> >& aRefs = theFeature->data()->refsToMe();
 186   std::set<std::shared_ptr<ModelAPI_Attribute> >::const_iterator aRefIter = aRefs.cbegin();
 187   for(; aRefIter != aRefs.cend(); aRefIter++) {
 188     if ((*aRefIter)->isArgument()) {
 189       FeaturePtr aReferenced = std::dynamic_pointer_cast<ModelAPI_Feature>((*aRefIter)->owner());
 190       if (aReferenced.get()) {
 191         addModified(aReferenced, theFeature);
 192       }
 193     }
 194   }
 195   // proccess also results
 196   std::list<ResultPtr> allResults; // list of this feature and results
 197   ModelAPI_Tools::allResults(theFeature, allResults);
 198   std::list<ResultPtr>::iterator aRes = allResults.begin();
 199   for(; aRes != allResults.end(); aRes++) {
 200     const std::set<std::shared_ptr<ModelAPI_Attribute> >& aRefs = (*aRes)->data()->refsToMe();
 201     std::set<std::shared_ptr<ModelAPI_Attribute> >::const_iterator aRefIter = aRefs.cbegin();
 202     for(; aRefIter != aRefs.cend(); aRefIter++) {
 203       if ((*aRefIter)->isArgument()) {
 204         FeaturePtr aReferenced = std::dynamic_pointer_cast<ModelAPI_Feature>((*aRefIter)->owner());
 205         if (aReferenced.get()) {
 206           addModified(aReferenced, theFeature);
 207         }
 208       }
 209     }
 210   }
 211
 212   // also add part feature that contains this feature to the modified
 213   if (theFeature->document()->kind() != "PartSet") {
 214     FeaturePtr aPart = ModelAPI_Tools::findPartFeature(
 215       ModelAPI_Session::get()->moduleDocument(), theFeature->document());
 216     if (aPart.get())
 217       addModified(aPart, theFeature);
 218   }
 219   return true;
 220 }
 221
 222 void Model_Update::processEvent(const std::shared_ptr<Events_Message>& theMessage)
 223 {
 224   static Events_Loop* aLoop = Events_Loop::loop();
 225   static const Events_ID kCreatedEvent = aLoop->eventByName(EVENT_OBJECT_CREATED);
 226   static const Events_ID kUpdatedEvent = aLoop->eventByName(EVENT_OBJECT_UPDATED);
 227   static const Events_ID kOpFinishEvent = aLoop->eventByName("FinishOperation");
 228   static const Events_ID kOpAbortEvent = aLoop->eventByName("AbortOperation");
 229   static const Events_ID kOpStartEvent = aLoop->eventByName("StartOperation");
 230   static const Events_ID kStabilityEvent = aLoop->eventByName(EVENT_STABILITY_CHANGED);
 231   static const Events_ID kPreviewBlockedEvent = aLoop->eventByName(EVENT_PREVIEW_BLOCKED);
 232   static const Events_ID kPreviewRequestedEvent = aLoop->eventByName(EVENT_PREVIEW_REQUESTED);
 233   static const Events_ID kReorderEvent = aLoop->eventByName(EVENT_ORDER_UPDATED);
 234   static const Events_ID kRedisplayEvent = aLoop->eventByName(EVENT_OBJECT_TO_REDISPLAY);
 235   static const Events_ID kUpdatedSel = aLoop->eventByName(EVENT_UPDATE_SELECTION);
 236   static const Events_ID kAutomaticOff = aLoop->eventByName(EVENT_AUTOMATIC_RECOMPUTATION_DISABLE);
 237   static const Events_ID kAutomaticOn = aLoop->eventByName(EVENT_AUTOMATIC_RECOMPUTATION_ENABLE);
 238
 239 #ifdef DEB_UPDATE
 240   std::cout<<"****** Event "<<theMessage->eventID().eventText()<<std::endl;
 241 #endif
 242   if (theMessage->eventID() == kStabilityEvent) {
 243     updateStability(theMessage->sender());
 244     return;
 245   }
 246   if (theMessage->eventID() == kPreviewBlockedEvent) {
 247     myIsPreviewBlocked = true;
 248     return;
 249   }
 250   if (theMessage->eventID() == kPreviewRequestedEvent) {
 251     if (myIsPreviewBlocked) {
 252       bool anUpdateState = myUpdateBlocked;
 253       myUpdateBlocked = false;
 254       myIsPreviewBlocked = false;
 255       processFeatures();
 256       myIsPreviewBlocked = true;
 257       myUpdateBlocked = anUpdateState;
 258     }
 259     return;
 260   }
 261   if (theMessage->eventID() == kAutomaticOff) {
 262     myUpdateBlocked = true;
 263     return;
 264   }
 265   if (theMessage->eventID() == kAutomaticOn) {
 266     myUpdateBlocked = false; // then process all modified features, even if preview is blocked
 267     bool aPreviewBlockedState = myIsPreviewBlocked; // to update the selected arguments
 268     myIsPreviewBlocked = false;
 269     processFeatures();
 270     myIsPreviewBlocked = myIsPreviewBlocked;
 271     return;
 272   }
 273   if (theMessage->eventID() == kUpdatedSel) {
 274     std::shared_ptr<ModelAPI_ObjectUpdatedMessage> aMsg =
 275         std::dynamic_pointer_cast<ModelAPI_ObjectUpdatedMessage>(theMessage);
 276     updateSelection(aMsg->objects());
 277   }
 278   // creation is added to "update" to avoid recomputation twice:
 279   // on create and immediately after on update
 280   if (theMessage->eventID() == kCreatedEvent) {
 281     std::shared_ptr<ModelAPI_ObjectUpdatedMessage> aMsg =
 282         std::dynamic_pointer_cast<ModelAPI_ObjectUpdatedMessage>(theMessage);
 283     const std::set<ObjectPtr>& anObjs = aMsg->objects();
 284     std::set<ObjectPtr>::const_iterator anObjIter = anObjs.cbegin();
 285     for(; anObjIter != anObjs.cend(); anObjIter++) {
 286       if (std::dynamic_pointer_cast<Model_Document>((*anObjIter)->document())->executeFeatures()) {
 287         if ((*anObjIter)->groupName() == ModelAPI_Feature::group()) {
 288           // results creation means enabling, not update
 289           ModelAPI_EventCreator::get()->sendUpdated(*anObjIter, kUpdatedEvent);
 290         } else {
 291           ModelAPI_EventCreator::get()->sendUpdated(*anObjIter, kRedisplayEvent);
 292         }
 293       }
 294     }
 295     return;
 296   }
 297   if (theMessage->eventID() == kUpdatedEvent) {
 298     std::shared_ptr<ModelAPI_ObjectUpdatedMessage> aMsg =
 299         std::dynamic_pointer_cast<ModelAPI_ObjectUpdatedMessage>(theMessage);
 300     const std::set<ObjectPtr>& anObjs = aMsg->objects();
 301     std::set<ObjectPtr>::const_iterator anObjIter = anObjs.cbegin();
 302     bool aSomeModified = false; // check that features not changed: only redisplay is needed
 303     for(; anObjIter != anObjs.cend(); anObjIter++) {
 304       if (!(*anObjIter)->data()->isValid())
 305         continue;
 306 #ifdef DEB_UPDATE
 307       std::cout<<">>> in event updated "<<(*anObjIter)->groupName()<<
 308         " "<<(*anObjIter)->data()->name()<<std::endl;
 309 #endif
 310       if ((*anObjIter)->groupName() == ModelAPI_ResultParameter::group()) {
 311         myIsParamUpdated = true;
 312       }
 313       // on undo/redo, abort do not update persisten features
 314       FeaturePtr anUpdated = std::dynamic_pointer_cast<ModelAPI_Feature>(*anObjIter);
 315       if (anUpdated.get()) {
 316         if (addModified(anUpdated, FeaturePtr()))
 317           aSomeModified = true;
 318       } else {
 319         // process the updated result as update of features that refers to this result
 320         const std::set<std::shared_ptr<ModelAPI_Attribute> >&
 321           aRefs = (*anObjIter)->data()->refsToMe();
 322         std::set<std::shared_ptr<ModelAPI_Attribute> >::const_iterator aRefIter = aRefs.cbegin();
 323         FeaturePtr aReason;
 324         ResultPtr aReasonResult = std::dynamic_pointer_cast<ModelAPI_Result>(*anObjIter);
 325         if (aReasonResult.get())
 326           aReason = (*anObjIter)->document()->feature(aReasonResult);
 327         for(; aRefIter != aRefs.cend(); aRefIter++) {
 328           if (!(*aRefIter)->owner()->data()->isValid())
 329             continue;
 330           FeaturePtr anUpdated = std::dynamic_pointer_cast<ModelAPI_Feature>((*aRefIter)->owner());
 331           if (anUpdated.get()) {
 332             if (addModified(anUpdated, aReason))
 333               aSomeModified = true;
 334           }
 335         }
 336       }
 337     }
 338     // this event is for solver update, not here, do not react immediately
 339     if (aSomeModified) {
 340         processFeatures();
 341     }
 342   } else if (theMessage->eventID() == kOpFinishEvent || theMessage->eventID() == kOpAbortEvent ||
 343       theMessage->eventID() == kOpStartEvent) {
 344     myIsPreviewBlocked = false;
 345
 346     if (theMessage->eventID() == kOpFinishEvent && !myUpdateBlocked) {// if update is blocked, skip
 347       myIsFinish = true;
 348       // add features that wait for finish as modified
 349       std::map<std::shared_ptr<ModelAPI_Feature>, std::set<std::shared_ptr<ModelAPI_Feature> > >::
 350         iterator aFeature = myProcessOnFinish.begin();
 351       for(; aFeature != myProcessOnFinish.end(); aFeature++) {
 352         if (aFeature->first->data()->isValid()) {// there may be already removed while wait
 353           if (aFeature->second.empty()) {
 354             addModified(aFeature->first, FeaturePtr());
 355             continue;
 356           }
 357           std::set<std::shared_ptr<ModelAPI_Feature> >::iterator aReasons;
 358           for(aReasons = aFeature->second.begin(); aReasons != aFeature->second.end(); aReasons++){
 359             addModified(aFeature->first, *aReasons);
 360           }
 361         }
 362       }
 363       myIsFinish = false;
 364     }
 365     // processed features must be only on finish, so clear anyway (to avoid reimport on load)
 366     if (!myUpdateBlocked) {
 367       myProcessOnFinish.clear();
 368
 369       // #2156: current must be sketch, left after the macro execution
 370       DocumentPtr anActiveDoc = ModelAPI_Session::get()->activeDocument();
 371       FeaturePtr aCurrent;
 372       if (anActiveDoc.get())
 373         aCurrent = anActiveDoc->currentFeature(false);
 374
 375       if (!(theMessage->eventID() == kOpStartEvent)) {
 376         processFeatures(false);
 377       }
 378
 379       if (anActiveDoc.get() && aCurrent.get() && aCurrent->data()->isValid()) {
 380         if (anActiveDoc->currentFeature(false) != aCurrent)
 381           anActiveDoc->setCurrentFeature(aCurrent, false); // #2156 make the current feature back
 382       }
 383     }
 384
 385
 386     // remove all macros before clearing all created
 387     std::set<FeaturePtr>::iterator anUpdatedIter = myWaitForFinish.begin();
 388     while(anUpdatedIter != myWaitForFinish.end()) {
 389       FeaturePtr aFeature = std::dynamic_pointer_cast<ModelAPI_Feature>(*anUpdatedIter);
 390       if (aFeature.get()) {
 391         // remove macro on finish
 392         if (aFeature->isMacro()) {
 393           aFeature->document()->removeFeature(aFeature);
 394           myWaitForFinish.erase(aFeature);
 395         }
 396         // to avoid the map update problems on "remove"
 397         if (myWaitForFinish.find(aFeature) == myWaitForFinish.end()) {
 398           anUpdatedIter = myWaitForFinish.begin();
 399         } else {
 400           anUpdatedIter++;
 401         }
 402       } else {
 403         anUpdatedIter++;
 404       }
 405     }
 406     // the redisplay signal should be flushed in order
 407     // to erase the feature presentation in the viewer
 408     // if should be done after removeFeature() of document,
 409     // by this reason, upper processFeatures() do not perform this flush
 410     Events_Loop::loop()->flush(kRedisplayEvent);
 411
 412     // in the end of transaction everything is updated, so clear the old objects
 413     myIsParamUpdated = false;
 414     myWaitForFinish.clear();
 415   } else if (theMessage->eventID() == kReorderEvent) {
 416     std::shared_ptr<ModelAPI_OrderUpdatedMessage> aMsg =
 417       std::dynamic_pointer_cast<ModelAPI_OrderUpdatedMessage>(theMessage);
 418     if (aMsg->reordered().get())
 419       addModified(aMsg->reordered(), aMsg->reordered()); // to update all attributes
 420   }
 421 }
 422
 423 void Model_Update::processFeatures(const bool theFlushRedisplay)
 424 {
 425    // perform update of everything if it is not performed right now or any preview is blocked
 426   if (!myIsProcessed && !myIsPreviewBlocked && !myUpdateBlocked) {
 427     myIsProcessed = true;
 428     #ifdef DEB_UPDATE
 429       std::cout<<"****** Start processing"<<std::endl;
 430     #endif
 431
 432     while(!myModified.empty()) {
 433       processFeature(myModified.begin()->first);
 434     }
 435     myIsProcessed = false;
 436
 437     // to update the object browser if something is updated/created during executions
 438     static Events_Loop* aLoop = Events_Loop::loop();
 439     static const Events_ID kCreatedEvent= aLoop->eventByName(EVENT_OBJECT_CREATED);
 440     aLoop->flush(kCreatedEvent);
 441     static const Events_ID kUpdatedEvent = aLoop->eventByName(EVENT_OBJECT_UPDATED);
 442     aLoop->flush(kUpdatedEvent);
 443
 444     // flush to update display
 445     if (theFlushRedisplay) {
 446       static Events_ID EVENT_DISP = aLoop->eventByName(EVENT_OBJECT_TO_REDISPLAY);
 447       aLoop->flush(EVENT_DISP);
 448     }
 449     #ifdef DEB_UPDATE
 450       std::cout<<"****** End processing"<<std::endl;
 451     #endif
 452     myProcessed.clear();
 453   }
 454 }
 455
 456 // collects all the feautres this feature depends on: reasons
 457 static void allReasons(FeaturePtr theFeature, std::set<FeaturePtr>& theReasons) {
 458   std::list<std::pair<std::string, std::list<std::shared_ptr<ModelAPI_Object> > > > aDeps;
 459   theFeature->data()->referencesToObjects(aDeps);
 460   std::list<std::pair<std::string, std::list<std::shared_ptr<ModelAPI_Object> > > >::iterator
 461     anAttrsIter = aDeps.begin();
 462   for(; anAttrsIter != aDeps.end(); anAttrsIter++) {
 463     if (theFeature->attribute(anAttrsIter->first)->isArgument()) {
 464       std::list<std::shared_ptr<ModelAPI_Object> >::iterator aDepIter = anAttrsIter->second.begin();
 465       for(; aDepIter != anAttrsIter->second.end(); aDepIter++) {
 466         FeaturePtr aDepFeat = std::dynamic_pointer_cast<ModelAPI_Feature>(*aDepIter);
 467         if (!aDepFeat.get()) { // so, it depends on the result and process the feature owner of it
 468           ResultPtr aDepRes = std::dynamic_pointer_cast<ModelAPI_Result>(*aDepIter);
 469           if (aDepRes.get()) {
 470             aDepFeat = (*aDepIter)->document()->feature(aDepRes);
 471           }
 472         }
 473         if (aDepFeat.get() && aDepFeat->data()->isValid()) {
 474           theReasons.insert(aDepFeat);
 475         }
 476       }
 477     }
 478   }
 479   if (theFeature->getKind() == "Part") {
 480     // part is not depended on its subs directly, but subs must be iterated anyway
 481     CompositeFeaturePtr aPart = std::dynamic_pointer_cast<ModelAPI_CompositeFeature>(theFeature);
 482     int aNum = aPart->numberOfSubs();
 483     for(int a = 0; a < aNum; a++) {
 484       FeaturePtr aSub = aPart->subFeature(a);
 485       if (aSub.get() && aSub->data()->isValid()) {
 486         theReasons.insert(aSub);
 487       }
 488     }
 489   }
 490 }
 491
 492 bool Model_Update::processFeature(FeaturePtr theFeature)
 493 {
 494   static ModelAPI_ValidatorsFactory* aFactory = ModelAPI_Session::get()->validators();
 495
 496   if (!theFeature->data()->isValid()) { // deleted feature, just remove from all containers
 497     if (myModified.find(theFeature) != myModified.end())
 498       myModified.erase(theFeature);
 499     return false;
 500   }
 501
 502   if (theFeature->isPersistentResult()) {
 503     if (!std::dynamic_pointer_cast<Model_Document>((theFeature)->document())->executeFeatures())
 504       return false;
 505   }
 506
 507   if (myProcessed.find(theFeature) == myProcessed.end()) {
 508     myProcessed[theFeature] = 0;
 509   } else {
 510     int aCount = myProcessed[theFeature];
 511     if (aCount > 100) {
 512       // too many repetition of processing (in VS it may crash on 330 with stack overflow)
 513       Events_InfoMessage("Model_Update",
 514         "Feature '%1' is updated in infinitive loop").arg(theFeature->data()->name()).send();
 515       // to stop iteration
 516       myModified.clear();
 517       return false;
 518     }
 519     myProcessed[theFeature] = aCount + 1;
 520   }
 521
 522   // check this feature is not yet checked or processed
 523   bool aIsModified = myModified.find(theFeature) != myModified.end();
 524   if (!aIsModified && myIsFinish) { // get info about the modification for features without preview
 525     if (theFeature->data()->execState() == ModelAPI_StateMustBeUpdated) {
 526       aIsModified = true;
 527       std::set<std::shared_ptr<ModelAPI_Feature> > aNewSet;
 528       // contains itself, so, we don't know which was the reason and the reason is any
 529       aNewSet.insert(theFeature);
 530       myModified[theFeature] = aNewSet;
 531     }
 532   }
 533
 534 #ifdef DEB_UPDATE
 535     std::cout<<"* Process feature "<<theFeature->name()<<std::endl;
 536 #endif
 537
 538   // update the sketch plane before the sketch sub-elements are recomputed
 539   // (otherwise sketch will update plane, modify subs, after executed, but with old subs edges)
 540   if (aIsModified && theFeature->getKind() == "Sketch") {
 541 #ifdef DEB_UPDATE
 542     std::cout<<"****** Update sketch args "<<theFeature->name()<<std::endl;
 543 #endif
 544     AttributeSelectionPtr anExtSel = theFeature->selection("External");
 545     if (anExtSel.get()) {
 546       ResultPtr aContext = anExtSel->context();
 547       if (aContext.get() && aContext->document().get()) {
 548         FeaturePtr anExtBase = aContext->document()->feature(aContext);
 549         if (anExtBase.get()) {
 550           processFeature(anExtBase);
 551         }
 552       }
 553     }
 554     std::shared_ptr<GeomAPI_Shape> aShapeBefore = anExtSel->value();
 555     if (!aShapeBefore.get() && anExtSel->context()) aShapeBefore = anExtSel->context()->shape();
 556     updateArguments(theFeature);
 557     std::shared_ptr<GeomAPI_Shape> aShapeAfter = anExtSel->value();
 558     if (!aShapeAfter.get() && anExtSel->context()) aShapeAfter = anExtSel->context()->shape();
 559     // if selected plane is changed, try to re-take external references of all subs of the sketch
 560     if (aShapeBefore.get() && !aShapeBefore->isEqual(aShapeAfter)) {
 561       std::set<FeaturePtr> aWholeR;
 562       allReasons(theFeature, aWholeR);
 563       std::set<FeaturePtr>::iterator aRIter = aWholeR.begin();
 564       for(; aRIter != aWholeR.end(); aRIter++) {
 565         if ((*aRIter)->data()->selection("External"))
 566           (*aRIter)->attributeChanged("External");
 567       }
 568     }
 569   }
 570
 571   if (!aIsModified) { // no modification is needed
 572     return false;
 573   }
 574
 575   // evaluate parameter before the sub-elements update:
 576   // it updates dependencies on evaluation (#1085)
 577   if (theFeature->getKind() == "Parameter") {
 578     theFeature->execute();
 579   }
 580
 581   bool isReferencedInvalid = false;
 582   // check all features this feature depended on (recursive call of updateFeature)
 583   std::set<FeaturePtr>& aReasons = myModified[theFeature];
 584   bool allSubsUsed = aReasons.find(theFeature) != aReasons.end();
 585   if (allSubsUsed) {
 586     // add all subs in aReasons and temporary remove "theFeature" to avoid processing itself
 587     allReasons(theFeature, aReasons);
 588     aReasons.erase(theFeature);
 589   }
 590   // take reasons one by one (they may be added during the feature process
 591   // (circle by the radius of sketch)
 592   std::set<FeaturePtr> aProcessedReasons;
 593   while(!aReasons.empty()) {
 594     FeaturePtr aReason = *(aReasons.begin());
 595 #ifdef DEB_UPDATE
 596     //cout<<theFeature->name()<<" process next reason "<<aReason->name()<<endl;
 597 #endif
 598     if (aReason != theFeature && (aReason)->data()->isValid()) {
 599       if (processFeature(aReason))
 600         aIsModified = true;
 601       // check validity of aReason once again because it may be removed by dependent feature
 602       // (e.g. by SketchPlugin_IntersectionPoint)
 603       if (!aReason->data()->isValid() ||
 604           aReason->data()->execState() == ModelAPI_StateInvalidArgument)
 605         isReferencedInvalid = true;
 606     }
 607     // searching for the next not used reason
 608     aProcessedReasons.insert(aReason);
 609     aReasons.erase(aReason);
 610   }
 611   // restore the modified reasons: they will be used in the update of arguments
 612   if (allSubsUsed) { // restore theFeature in this set
 613     aProcessedReasons.insert(theFeature);
 614   }
 615   myModified[theFeature] = aProcessedReasons;
 616
 617   // do not execute the composite that contains the current
 618   bool isPostponedMain = false;
 619   CompositeFeaturePtr aCompos = std::dynamic_pointer_cast<ModelAPI_CompositeFeature>(theFeature);
 620   if (theFeature->getKind() == "ExtrusionSketch" && aCompos.get()) {
 621     CompositeFeaturePtr aCurrentOwner =
 622       ModelAPI_Tools::compositeOwner(theFeature->document()->currentFeature(false));
 623     isPostponedMain = aCurrentOwner.get() && aCompos->isSub(aCurrentOwner);
 624   } else if (theFeature->getKind() == "Sketch" &&
 625     std::dynamic_pointer_cast<Model_Document>((theFeature)->document())->executeFeatures()) {
 626     // send event that sketch is prepared to be recomputed
 627     static Events_ID anID = Events_Loop::eventByName("SketchPrepared");
 628     std::shared_ptr<Events_Message> aMsg(new Events_Message(anID, this));
 629     Events_Loop* aLoop = Events_Loop::loop();
 630     // in case it is finish operation, flush for the sketch other events (#2450)
 631     aLoop->flush(aLoop->eventByName(EVENT_OBJECT_UPDATED));
 632     aLoop->send(aMsg);
 633     // check that sub-elements of sketch are updated => sketch must be re-processed
 634     std::set<FeaturePtr> aWholeR;
 635     allReasons(theFeature, aWholeR);
 636     std::set<FeaturePtr>::iterator aRIter = aWholeR.begin();
 637     for(; aRIter != aWholeR.end(); aRIter++) {
 638       if (myModified.find(*aRIter) != myModified.end()) {
 639         processFeature(theFeature);
 640         return true;
 641       }
 642     }
 643   }
 644
 645 #ifdef DEB_UPDATE
 646   std::cout<<"Update args "<<theFeature->name()<<std::endl;
 647 #endif
 648   // TestImport.py : after arguments are updated, theFeature may be removed
 649   if (!theFeature->data()->isValid())
 650     return false;
 651   // Update selection and parameters attributes first, before sub-features analysis (sketch plane).
 652   updateArguments(theFeature);
 653
 654   // add this feature to the processed right now to be able remove it from this list on
 655   // update signal during this feature execution
 656   myModified.erase(theFeature);
 657   if (myNotPersistentRefs.find(theFeature) != myNotPersistentRefs.end())
 658     myNotPersistentRefs.erase(theFeature);
 659   if (theFeature->data()->execState() == ModelAPI_StateMustBeUpdated)
 660     theFeature->data()->execState(ModelAPI_StateDone);
 661
 662   // this checking must be after the composite feature sub-elements processing:
 663   // composite feature status may depend on it's subelements
 664   if ((theFeature->data()->execState() == ModelAPI_StateInvalidArgument || isReferencedInvalid) &&
 665     theFeature->getKind() != "Part") {
 666       // don't disable Part because it will make disabled all the features
 667       // (performance and problems with the current feature)
 668   #ifdef DEB_UPDATE
 669     std::cout<<"Invalid args "<<theFeature->name()<<std::endl;
 670   #endif
 671     theFeature->eraseResults(false);
 672     redisplayWithResults(theFeature, ModelAPI_StateInvalidArgument); // result also must be updated
 673     return true; // so, feature is modified (results are erased)
 674   }
 675
 676   // execute feature if it must be updated
 677   ModelAPI_ExecState aState = theFeature->data()->execState();
 678   if (aFactory->validate(theFeature)) {
 679     if (!isPostponedMain) {
 680       executeFeature(theFeature);
 681     }
 682   } else {
 683     #ifdef DEB_UPDATE
 684       std::cout<<"Feature is not valid, erase results "<<theFeature->name()<<std::endl;
 685     #endif
 686     theFeature->eraseResults(false);
 687     redisplayWithResults(theFeature, ModelAPI_StateInvalidArgument); // result also must be updated
 688   }
 689   return true;
 690 }
 691
 692 void Model_Update::redisplayWithResults(
 693   FeaturePtr theFeature, const ModelAPI_ExecState theState, bool theUpdateState)
 694 {
 695   // make updated and redisplay all results
 696   static Events_ID EVENT_DISP = Events_Loop::loop()->eventByName(EVENT_OBJECT_TO_REDISPLAY);
 697
 698   std::list<ResultPtr> allResults;
 699   ModelAPI_Tools::allResults(theFeature, allResults);
 700   std::list<ResultPtr>::iterator aRIter = allResults.begin();
 701   for (; aRIter != allResults.cend(); aRIter++) {
 702     std::shared_ptr<ModelAPI_Result> aRes = *aRIter;
 703     if (!aRes->isDisabled()) {
 704       // update state only for enabled results
 705       // (Placement Result Part may make the original Part Result as invalid)
 706       if (theUpdateState)
 707         aRes->data()->execState(theState);
 708     }
 709     if (theFeature->data()->updateID() > aRes->data()->updateID()) {
 710       aRes->data()->setUpdateID(theFeature->data()->updateID());
 711     }
 712     ModelAPI_EventCreator::get()->sendUpdated(aRes, EVENT_DISP);
 713   }
 714   // to redisplay "presentable" feature (for ex. distance constraint)
 715   ModelAPI_EventCreator::get()->sendUpdated(theFeature, EVENT_DISP);
 716   if (theUpdateState)
 717     theFeature->data()->execState(theState);
 718 }
 719
 720 /// Updates the state by the referenced object: if something bad with it, set state for this one
 721 ModelAPI_ExecState stateByReference(ObjectPtr theTarget, const ModelAPI_ExecState theCurrent)
 722 {
 723   if (theTarget) {
 724     ModelAPI_ExecState aRefState = theTarget->data()->execState();
 725     if (aRefState == ModelAPI_StateMustBeUpdated) {
 726       if (theCurrent == ModelAPI_StateDone)
 727         return ModelAPI_StateMustBeUpdated;
 728     } else if (aRefState != ModelAPI_StateDone) {
 729       return ModelAPI_StateInvalidArgument;
 730     }
 731   }
 732   return theCurrent;
 733 }
 734
 735 void Model_Update::updateArguments(FeaturePtr theFeature) {
 736   // perform this method also for disabled features: to make "not done" state for
 737   // features referenced to the active and modified features
 738   static ModelAPI_ValidatorsFactory* aFactory = ModelAPI_Session::get()->validators();
 739
 740   ModelAPI_ExecState aState = theFeature->data()->execState();
 741   if (aState == ModelAPI_StateExecFailed) { // try again failed feature: issue 577
 742     aState = ModelAPI_StateMustBeUpdated;
 743   }
 744   if (aState == ModelAPI_StateInvalidArgument) // a chance to be corrected
 745     aState = ModelAPI_StateMustBeUpdated;
 746   // check the parameters state
 747   // Integer
 748   {
 749     std::list<AttributePtr> anAttrinbutes =
 750       theFeature->data()->attributes(ModelAPI_AttributeInteger::typeId());
 751     std::list<AttributePtr>::iterator anIter = anAttrinbutes.begin();
 752     for(; anIter != anAttrinbutes.end(); anIter++) {
 753       AttributeIntegerPtr anAttribute =
 754         std::dynamic_pointer_cast<ModelAPI_AttributeInteger>(*anIter);
 755       if (anAttribute.get() && !anAttribute->text().empty()) {
 756         if (myIsParamUpdated) {
 757           ModelAPI_AttributeEvalMessage::send(anAttribute, this);
 758         }
 759         if (anAttribute->expressionInvalid()) {
 760           aState = ModelAPI_StateInvalidArgument;
 761         }
 762       }
 763     }
 764   }
 765   // Double
 766   {
 767     std::list<AttributePtr> aDoubles =
 768       theFeature->data()->attributes(ModelAPI_AttributeDouble::typeId());
 769     std::list<AttributePtr>::iterator aDoubleIter = aDoubles.begin();
 770     for(; aDoubleIter != aDoubles.end(); aDoubleIter++) {
 771       AttributeDoublePtr aDouble =
 772         std::dynamic_pointer_cast<ModelAPI_AttributeDouble>(*aDoubleIter);
 773       if (aDouble.get() && !aDouble->text().empty()) {
 774         if (myIsParamUpdated) {
 775           ModelAPI_AttributeEvalMessage::send(aDouble, this);
 776         }
 777         if (aDouble->expressionInvalid()) {
 778           aState = ModelAPI_StateInvalidArgument;
 779         }
 780       }
 781     }
 782   }
 783   // Point
 784   {
 785     std::list<AttributePtr> anAttributes =
 786       theFeature->data()->attributes(GeomDataAPI_Point::typeId());
 787     std::list<AttributePtr>::iterator anIter = anAttributes.begin();
 788     for(; anIter != anAttributes.end(); anIter++) {
 789       AttributePointPtr aPointAttribute =
 790         std::dynamic_pointer_cast<GeomDataAPI_Point>(*anIter);
 791       if (aPointAttribute.get() && (!aPointAttribute->textX().empty() ||
 792           !aPointAttribute->textY().empty() || !aPointAttribute->textZ().empty())) {
 793         if (myIsParamUpdated) {
 794           ModelAPI_AttributeEvalMessage::send(aPointAttribute, this);
 795         }
 796         if ((!aPointAttribute->textX().empty() && aPointAttribute->expressionInvalid(0)) ||
 797           (!aPointAttribute->textY().empty() && aPointAttribute->expressionInvalid(1)) ||
 798           (!aPointAttribute->textZ().empty() && aPointAttribute->expressionInvalid(2)))
 799           aState = ModelAPI_StateInvalidArgument;
 800       }
 801     }
 802   }
 803   // Point2D
 804   {
 805     std::list<AttributePtr> anAttributes =
 806       theFeature->data()->attributes(GeomDataAPI_Point2D::typeId());
 807     std::list<AttributePtr>::iterator anIter = anAttributes.begin();
 808     for(; anIter != anAttributes.end(); anIter++) {
 809       AttributePoint2DPtr aPoint2DAttribute =
 810         std::dynamic_pointer_cast<GeomDataAPI_Point2D>(*anIter);
 811       if (aPoint2DAttribute.get()) {
 812         if (myIsParamUpdated && (!aPoint2DAttribute->textX().empty() ||
 813             !aPoint2DAttribute->textY().empty())) {
 814           ModelAPI_AttributeEvalMessage::send(aPoint2DAttribute, this);
 815         }
 816         if ((!aPoint2DAttribute->textX().empty() && aPoint2DAttribute->expressionInvalid(0)) ||
 817           (!aPoint2DAttribute->textY().empty() && aPoint2DAttribute->expressionInvalid(1)))
 818           aState = ModelAPI_StateInvalidArgument;
 819       }
 820     }
 821   }
 822   // update the selection attributes if any
 823   std::list<AttributePtr> aRefs =
 824     theFeature->data()->attributes(ModelAPI_AttributeSelection::typeId());
 825   std::list<AttributePtr>::iterator aRefsIter = aRefs.begin();
 826   for (; aRefsIter != aRefs.end(); aRefsIter++) {
 827     std::shared_ptr<ModelAPI_AttributeSelection> aSel =
 828       std::dynamic_pointer_cast<ModelAPI_AttributeSelection>(*aRefsIter);
 829     ObjectPtr aContext = aSel->context();
 830     // update argument only if the referenced object is ready to use
 831     if (aContext.get() && !aContext->isDisabled()) {
 832       if (isReason(theFeature, aContext)) {
 833         if (!aSel->update()) { // this must be done on execution since it may be long operation
 834           bool isObligatory = !aFactory->isNotObligatory(
 835             theFeature->getKind(), theFeature->data()->id(aSel)) &&
 836             aFactory->isCase(theFeature, theFeature->data()->id(aSel));
 837           if (isObligatory)
 838             aState = ModelAPI_StateInvalidArgument;
 839         }
 840       }
 841     } else if (aContext.get()) {
 842       // here it may be not obligatory, but if the reference is wrong, it should not be correct
 843       bool isObligatory = aFactory->isCase(theFeature, theFeature->data()->id(aSel));
 844       if (isObligatory)
 845         aState = ModelAPI_StateInvalidArgument;
 846     }
 847   }
 848   // update the selection list attributes if any
 849   aRefs = theFeature->data()->attributes(ModelAPI_AttributeSelectionList::typeId());
 850   for (aRefsIter = aRefs.begin(); aRefsIter != aRefs.end(); aRefsIter++) {
 851     std::shared_ptr<ModelAPI_AttributeSelectionList> aSel =
 852       std::dynamic_pointer_cast<ModelAPI_AttributeSelectionList>(*aRefsIter);
 853     for(int a = aSel->size() - 1; a >= 0; a--) {
 854       std::shared_ptr<ModelAPI_AttributeSelection> aSelAttr =
 855         std::dynamic_pointer_cast<ModelAPI_AttributeSelection>(aSel->value(a));
 856       if (aSelAttr) {
 857         ObjectPtr aContext = aSelAttr->context();
 858         // update argument only if the referenced object is ready to use
 859         if (aContext.get() && !aContext->isDisabled() && !aSelAttr->isInvalid()) {
 860           if (isReason(theFeature, aContext)) {
 861             if (!aSelAttr->update()) {
 862               bool isObligatory = !aFactory->isNotObligatory(
 863                 theFeature->getKind(), theFeature->data()->id(aSel)) &&
 864                 aFactory->isCase(theFeature, theFeature->data()->id(aSel));
 865               if (isObligatory)
 866                 aState = ModelAPI_StateInvalidArgument;
 867             }
 868           }
 869         } else if (aContext.get() || aSelAttr->isInvalid()) {
 870           // here it may be not obligatory, but if the reference is wrong, it should not be correct
 871           bool isObligatory = aFactory->isCase(theFeature, theFeature->data()->id(aSel));
 872           if (isObligatory)
 873             aState = ModelAPI_StateInvalidArgument;
 874         }
 875       }
 876     }
 877   }
 878
 879   if (aState != ModelAPI_StateDone)
 880     theFeature->data()->execState(aState);
 881 }
 882
 883 bool Model_Update::isReason(std::shared_ptr<ModelAPI_Feature>& theFeature,
 884      std::shared_ptr<ModelAPI_Object> theReason)
 885 {
 886   std::map<std::shared_ptr<ModelAPI_Feature>, std::set<std::shared_ptr<ModelAPI_Feature> > >
 887     ::iterator aReasonsIt = myModified.find(theFeature);
 888   if (aReasonsIt != myModified.end()) {
 889     if (aReasonsIt->second.find(theFeature) != aReasonsIt->second.end())
 890       return true; // any is reason if it contains itself
 891     FeaturePtr aReasFeat = std::dynamic_pointer_cast<ModelAPI_Feature>(theReason);
 892     if (!aReasFeat.get()) { // try to get feature of this result
 893       ResultPtr aReasRes = std::dynamic_pointer_cast<ModelAPI_Result>(theReason);
 894       if (aReasRes.get())
 895         aReasFeat = theReason->document()->feature(aReasRes);
 896     }
 897     if (aReasonsIt->second.find(aReasFeat) != aReasonsIt->second.end())
 898       return true;
 899   }
 900   // another try: postponed modification by not-persistences
 901   std::map<std::shared_ptr<ModelAPI_Feature>, std::set<std::shared_ptr<ModelAPI_Feature> > >
 902     ::iterator aNotPersist = myNotPersistentRefs.find(theFeature);
 903   if (aNotPersist != myNotPersistentRefs.end()) {
 904     FeaturePtr aReasFeat = std::dynamic_pointer_cast<ModelAPI_Feature>(theReason);
 905     if (!aReasFeat.get()) { // try to get feature of this result
 906       ResultPtr aReasRes = std::dynamic_pointer_cast<ModelAPI_Result>(theReason);
 907       if (aReasRes.get())
 908         aReasFeat = theReason->document()->feature(aReasRes);
 909     }
 910     if (aNotPersist->second.find(aReasFeat) != aNotPersist->second.end())
 911       return true;
 912   }
 913
 914   // this case only for not-previewed items update state, nothing is changed in args for it
 915   return false;
 916 }
 917
 918 void Model_Update::executeFeature(FeaturePtr theFeature)
 919 {
 920 #ifdef DEB_UPDATE
 921   std::cout<<"Execute Feature "<<theFeature->name()<<std::endl;
 922 #endif
 923   // execute in try-catch to avoid internal problems of the feature
 924   ModelAPI_ExecState aState = ModelAPI_StateDone;
 925   theFeature->data()->execState(ModelAPI_StateDone);
 926   try {
 927     theFeature->execute();
 928     if (theFeature->data()->execState() != ModelAPI_StateDone) {
 929       aState = ModelAPI_StateExecFailed;
 930     } else {
 931       aState = ModelAPI_StateDone;
 932     }
 933   } catch(...) {
 934     aState = ModelAPI_StateExecFailed;
 935     Events_InfoMessage("Model_Update",
 936       "Feature %1 has failed during the execution").arg(theFeature->getKind()).send();
 937   }
 938   // The macro feature has to be deleted in any case even its execution is failed
 939   myWaitForFinish.insert(theFeature);
 940   if (aState != ModelAPI_StateDone) {
 941     theFeature->eraseResults(false);
 942   }
 943   theFeature->data()->setUpdateID(ModelAPI_Session::get()->transactionID());
 944   redisplayWithResults(theFeature, aState);
 945 }
 946
 947 void Model_Update::updateStability(void* theSender)
 948 {
 949   static ModelAPI_ValidatorsFactory* aFactory = ModelAPI_Session::get()->validators();
 950   if (theSender) {
 951     bool added = false; // object may be was crated
 952     ModelAPI_Object* aSender = static_cast<ModelAPI_Object*>(theSender);
 953     if (aSender && aSender->document()) {
 954       FeaturePtr aFeatureSender =
 955         std::dynamic_pointer_cast<ModelAPI_Feature>(aSender->data()->owner());
 956       if (aFeatureSender.get()) {
 957         Model_Objects* aDocObjects =
 958           std::dynamic_pointer_cast<Model_Document>(aSender->document())->objects();
 959         if (aDocObjects) {
 960           //aDocObjects->synchronizeBackRefs();
 961           // remove or add all concealment refs from this feature
 962           std::list<std::pair<std::string, std::list<ObjectPtr> > > aRefs;
 963           aSender->data()->referencesToObjects(aRefs);
 964           std::list<std::pair<std::string, std::list<ObjectPtr> > >::iterator
 965             aRefIt = aRefs.begin();
 966           for(; aRefIt != aRefs.end(); aRefIt++) {
 967             if (!aFactory->isConcealed(aFeatureSender->getKind(), aRefIt->first))
 968               // take into account only concealed references
 969               // (do not remove the sketch constraint and the edge on constraint edit)
 970               continue;
 971             std::list<ObjectPtr>& aRefFeaturesList = aRefIt->second;
 972             std::list<ObjectPtr>::iterator aReferenced = aRefFeaturesList.begin();
 973             for(; aReferenced != aRefFeaturesList.end(); aReferenced++) {
 974                // stability is only on results: feature to feature reference mean nested
 975               // features, that will remove nesting references
 976               if (aReferenced->get() && (*aReferenced)->data()->isValid() &&
 977                 (*aReferenced)->groupName() != ModelAPI_Feature::group()) {
 978                 std::shared_ptr<Model_Data> aData =
 979                   std::dynamic_pointer_cast<Model_Data>((*aReferenced)->data());
 980                 if (aFeatureSender->isStable()) {
 981                   aData->addBackReference(aFeatureSender, aRefIt->first);
 982                 } else {
 983                   aData->removeBackReference(aFeatureSender, aRefIt->first);
 984                   added = true; // remove of concealment may be caused creation of some result
 985                 }
 986               }
 987             }
 988           }
 989         }
 990       }
 991     }
 992     if (added) {
 993       static Events_Loop* aLoop = Events_Loop::loop();
 994       static Events_ID kEventCreated = aLoop->eventByName(EVENT_OBJECT_CREATED);
 995       aLoop->flush(kEventCreated);
 996     }
 997   }
 998 }
 999
1000 void Model_Update::updateSelection(const std::set<std::shared_ptr<ModelAPI_Object> >& theObjects)
1001 {
1002   std::set<std::shared_ptr<ModelAPI_Object> >::iterator anObj = theObjects.begin();
1003   for(; anObj != theObjects.end(); anObj++) {
1004     std::list<AttributePtr> aRefs =
1005       (*anObj)->data()->attributes(ModelAPI_AttributeSelection::typeId());
1006     std::list<AttributePtr>::iterator aRefsIter = aRefs.begin();
1007     for (; aRefsIter != aRefs.end(); aRefsIter++) {
1008       std::shared_ptr<Model_AttributeSelection> aSel =
1009         std::dynamic_pointer_cast<Model_AttributeSelection>(*aRefsIter);
1010       aSel->updateInHistory();
1011     }
1012     // update the selection list attributes if any
1013     aRefs = (*anObj)->data()->attributes(ModelAPI_AttributeSelectionList::typeId());
1014     for (aRefsIter = aRefs.begin(); aRefsIter != aRefs.end(); aRefsIter++) {
1015       std::shared_ptr<ModelAPI_AttributeSelectionList> aSel =
1016         std::dynamic_pointer_cast<ModelAPI_AttributeSelectionList>(*aRefsIter);
1017       for(int a = aSel->size() - 1; a >= 0; a--) {
1018         std::shared_ptr<Model_AttributeSelection> aSelAttr =
1019           std::dynamic_pointer_cast<Model_AttributeSelection>(aSel->value(a));
1020         if (aSelAttr.get())
1021           aSelAttr->updateInHistory();
1022       }
1023     }
1024   }
1025 }