src/Model/Model_Objects.cpp

   1 // Copyright (C) 2014-20xx CEA/DEN, EDF R&D
   2
   3 // File:        Model_Objects.cxx
   4 // Created:     15 May 2015
   5 // Author:      Mikhail PONIKAROV
   6
   7 #include <Model_Objects.h>
   8 #include <Model_Data.h>
   9 #include <Model_Document.h>
  10 #include <Model_Events.h>
  11 #include <Model_Session.h>
  12 #include <Model_ResultPart.h>
  13 #include <Model_ResultConstruction.h>
  14 #include <Model_ResultBody.h>
  15 #include <Model_ResultGroup.h>
  16 #include <Model_ResultParameter.h>
  17 #include <ModelAPI_Validator.h>
  18 #include <ModelAPI_CompositeFeature.h>
  19
  20 #include <Events_Loop.h>
  21 #include <Events_Error.h>
  22
  23 #include <TDataStd_Integer.hxx>
  24 #include <TDataStd_Comment.hxx>
  25 #include <TDF_ChildIDIterator.hxx>
  26 #include <TDataStd_ReferenceArray.hxx>
  27 #include <TDataStd_HLabelArray1.hxx>
  28 #include <TDataStd_Name.hxx>
  29 #include <TDF_Reference.hxx>
  30 #include <TDF_ChildIDIterator.hxx>
  31 #include <TDF_LabelMapHasher.hxx>
  32
  33 static const int TAG_OBJECTS = 2;  // tag of the objects sub-tree (features, results)
  34
  35 // feature sub-labels
  36 static const int TAG_FEATURE_ARGUMENTS = 1;  ///< where the arguments are located
  37 static const int TAG_FEATURE_RESULTS = 2;  ///< where the results are located
  38
  39 ///
  40 /// 0:1:2 - where features are located
  41 /// 0:1:2:N:1 - data of the feature N
  42 /// 0:1:2:N:2:K:1 - data of the K result of the feature N
  43
  44 Model_Objects::Model_Objects(TDF_Label theMainLab) : myMain(theMainLab)
  45 {
  46 }
  47
  48 void Model_Objects::setOwner(DocumentPtr theDoc)
  49 {
  50   myDoc = theDoc;
  51   // update all fields and recreate features and result objects if needed
  52   synchronizeFeatures(false, true, true);
  53   myHistory.clear();
  54 }
  55
  56 Model_Objects::~Model_Objects()
  57 {
  58   // delete all features of this document
  59   Events_Loop* aLoop = Events_Loop::loop();
  60   NCollection_DataMap<TDF_Label, FeaturePtr>::Iterator aFeaturesIter(myFeatures);
  61   for(; aFeaturesIter.More(); aFeaturesIter.Next()) {
  62     FeaturePtr aFeature = aFeaturesIter.Value();
  63     static Events_ID EVENT_DISP = aLoop->eventByName(EVENT_OBJECT_TO_REDISPLAY);
  64     ModelAPI_EventCreator::get()->sendDeleted(myDoc, ModelAPI_Feature::group());
  65     ModelAPI_EventCreator::get()->sendUpdated(aFeature, EVENT_DISP);
  66     aFeature->eraseResults();
  67     aFeature->erase();
  68   }
  69   myFeatures.Clear();
  70   aLoop->flush(Events_Loop::eventByName(EVENT_OBJECT_DELETED));
  71   aLoop->flush(Events_Loop::eventByName(EVENT_OBJECT_TO_REDISPLAY));
  72
  73 }
  74
  75 /// Appends to the array of references a new referenced label
  76 static void AddToRefArray(TDF_Label& theArrayLab, TDF_Label& theReferenced, TDF_Label& thePrevLab)
  77 {
  78   Handle(TDataStd_ReferenceArray) aRefs;
  79   if (!theArrayLab.FindAttribute(TDataStd_ReferenceArray::GetID(), aRefs)) {
  80     aRefs = TDataStd_ReferenceArray::Set(theArrayLab, 0, 0);
  81     aRefs->SetValue(0, theReferenced);
  82   } else {  // extend array by one more element
  83     Handle(TDataStd_HLabelArray1) aNewArray = new TDataStd_HLabelArray1(aRefs->Lower(),
  84                                                                         aRefs->Upper() + 1);
  85     int aPassedPrev = 0; // prev feature is found and passed
  86     if (thePrevLab.IsNull()) { // null means that inserted feature must be the first
  87       aNewArray->SetValue(aRefs->Lower(), theReferenced);
  88       aPassedPrev = 1;
  89     }
  90     for (int a = aRefs->Lower(); a <= aRefs->Upper(); a++) {
  91       aNewArray->SetValue(a + aPassedPrev, aRefs->Value(a));
  92       if (!aPassedPrev && aRefs->Value(a).IsEqual(thePrevLab)) {
  93         aPassedPrev = 1;
  94         aNewArray->SetValue(a + 1, theReferenced);
  95       }
  96     }
  97     if (!aPassedPrev) // not found: unknown situation
  98       aNewArray->SetValue(aRefs->Upper() + 1, theReferenced);
  99     aRefs->SetInternalArray(aNewArray);
 100   }
 101 }
 102
 103 void Model_Objects::addFeature(FeaturePtr theFeature, const FeaturePtr theAfterThis)
 104 {
 105   if (!theFeature->isAction()) {  // do not add action to the data model
 106     TDF_Label aFeaturesLab = featuresLabel();
 107     TDF_Label aFeatureLab = aFeaturesLab.NewChild();
 108     // store feature in the features array: before "initData" because in macro features
 109     // in initData it creates new features, appeared later than this
 110     TDF_Label aPrevFeateureLab;
 111     if (theAfterThis.get()) { // searching for the previous feature label
 112       std::shared_ptr<Model_Data> aPrevData =
 113         std::dynamic_pointer_cast<Model_Data>(theAfterThis->data());
 114       if (aPrevData.get()) {
 115         aPrevFeateureLab = aPrevData->label().Father();
 116       }
 117     }
 118     AddToRefArray(aFeaturesLab, aFeatureLab, aPrevFeateureLab);
 119
 120     initData(theFeature, aFeatureLab, TAG_FEATURE_ARGUMENTS);
 121     // keep the feature ID to restore document later correctly
 122     TDataStd_Comment::Set(aFeatureLab, theFeature->getKind().c_str());
 123     myFeatures.Bind(aFeatureLab, theFeature);
 124     // event: feature is added
 125     static Events_ID anEvent = Events_Loop::eventByName(EVENT_OBJECT_CREATED);
 126     ModelAPI_EventCreator::get()->sendUpdated(theFeature, anEvent);
 127     theFeature->setDisabled(false); // by default created feature is enabled
 128     updateHistory(ModelAPI_Feature::group());
 129   } else { // make feature has not-null data anyway
 130     theFeature->setData(Model_Data::invalidData());
 131     theFeature->setDoc(myDoc);
 132   }
 133 }
 134
 135 /// Appends to the array of references a new referenced label.
 136 /// If theIndex is not -1, removes element at this index, not theReferenced.
 137 /// \returns the index of removed element
 138 static int RemoveFromRefArray(TDF_Label theArrayLab, TDF_Label theReferenced,
 139   const int theIndex = -1)
 140 {
 141   int aResult = -1;  // no returned
 142   Handle(TDataStd_ReferenceArray) aRefs;
 143   if (theArrayLab.FindAttribute(TDataStd_ReferenceArray::GetID(), aRefs)) {
 144     if (aRefs->Length() == 1) {  // just erase an array
 145       if ((theIndex == -1 && aRefs->Value(0) == theReferenced) || theIndex == 0) {
 146         theArrayLab.ForgetAttribute(TDataStd_ReferenceArray::GetID());
 147       }
 148       aResult = 0;
 149     } else {  // reduce the array
 150       Handle(TDataStd_HLabelArray1) aNewArray = new TDataStd_HLabelArray1(aRefs->Lower(),
 151                                                                           aRefs->Upper() - 1);
 152       int aCount = aRefs->Lower();
 153       for (int a = aCount; a <= aRefs->Upper(); a++, aCount++) {
 154         if ((theIndex == -1 && aRefs->Value(a) == theReferenced) || theIndex == a) {
 155           aCount--;
 156           aResult = a;
 157         } else {
 158           aNewArray->SetValue(aCount, aRefs->Value(a));
 159         }
 160       }
 161       aRefs->SetInternalArray(aNewArray);
 162     }
 163   }
 164   return aResult;
 165 }
 166
 167 void Model_Objects::refsToFeature(FeaturePtr theFeature,
 168   std::set<std::shared_ptr<ModelAPI_Feature> >& theRefs, const bool isSendError)
 169 {
 170   // check the feature: it must have no depended objects on it
 171   // the dependencies can be in the feature results
 172   std::list<ResultPtr>::const_iterator aResIter = theFeature->results().cbegin();
 173   for(; aResIter != theFeature->results().cend(); aResIter++) {
 174     ResultPtr aResult = (*aResIter);
 175     std::shared_ptr<Model_Data> aData =
 176       std::dynamic_pointer_cast<Model_Data>(aResult->data());
 177     if (aData.get() != NULL) {
 178       const std::set<AttributePtr>& aRefs = aData->refsToMe();
 179       std::set<AttributePtr>::const_iterator aRefIt = aRefs.begin(), aRefLast = aRefs.end();
 180       for(; aRefIt != aRefLast; aRefIt++) {
 181         FeaturePtr aFeature = std::dynamic_pointer_cast<ModelAPI_Feature>((*aRefIt)->owner());
 182         if (aFeature.get() != NULL)
 183           theRefs.insert(aFeature);
 184       }
 185     }
 186   }
 187   // the dependencies can be in the feature itself
 188   std::shared_ptr<Model_Data> aData =
 189       std::dynamic_pointer_cast<Model_Data>(theFeature->data());
 190   if (aData && !aData->refsToMe().empty()) {
 191     const std::set<AttributePtr>& aRefs = aData->refsToMe();
 192     std::set<AttributePtr>::const_iterator aRefIt = aRefs.begin(), aRefLast = aRefs.end();
 193     for(; aRefIt != aRefLast; aRefIt++) {
 194       FeaturePtr aFeature = std::dynamic_pointer_cast<ModelAPI_Feature>((*aRefIt)->owner());
 195       if (aFeature.get() != NULL)
 196         theRefs.insert(aFeature);
 197     }
 198   }
 199
 200   if (!theRefs.empty() && isSendError) {
 201     Events_Error::send(
 202       "Feature '" + theFeature->data()->name() + "' is used and can not be deleted");
 203   }
 204 }
 205
 206 void Model_Objects::removeFeature(FeaturePtr theFeature)
 207 {
 208   std::shared_ptr<Model_Data> aData = std::static_pointer_cast<Model_Data>(theFeature->data());
 209   if (aData && aData->isValid()) {
 210     // checking that the sub-element of composite feature is removed: if yes, inform the owner
 211     std::set<std::shared_ptr<ModelAPI_Feature> > aRefs;
 212     refsToFeature(theFeature, aRefs, false);
 213     std::set<std::shared_ptr<ModelAPI_Feature> >::iterator aRefIter = aRefs.begin();
 214     for(; aRefIter != aRefs.end(); aRefIter++) {
 215       std::shared_ptr<ModelAPI_CompositeFeature> aComposite =
 216         std::dynamic_pointer_cast<ModelAPI_CompositeFeature>(*aRefIter);
 217       if (aComposite.get()) {
 218         aComposite->removeFeature(theFeature);
 219       }
 220     }
 221     // this must be before erase since theFeature erasing removes all information about
 222     // the feature results and groups of results
 223     // To reproduce: create sketch, extrusion, remove sketch => constructions tree is not updated
 224     clearHistory(theFeature);
 225     // erase fields
 226     theFeature->erase();
 227
 228     TDF_Label aFeatureLabel = aData->label().Father();
 229     if (myFeatures.IsBound(aFeatureLabel))
 230       myFeatures.UnBind(aFeatureLabel);
 231
 232     static Events_ID EVENT_DISP = Events_Loop::loop()->eventByName(EVENT_OBJECT_TO_REDISPLAY);
 233     ModelAPI_EventCreator::get()->sendUpdated(theFeature, EVENT_DISP);
 234     // erase all attributes under the label of feature
 235     aFeatureLabel.ForgetAllAttributes();
 236     // remove it from the references array
 237     RemoveFromRefArray(featuresLabel(), aFeatureLabel);
 238     // event: feature is deleted
 239     ModelAPI_EventCreator::get()->sendDeleted(theFeature->document(), ModelAPI_Feature::group());
 240     // the redisplay signal should be flushed in order to erase the feature presentation in the viewer
 241     Events_Loop::loop()->flush(EVENT_DISP);
 242     updateHistory(ModelAPI_Feature::group());
 243   }
 244 }
 245
 246 void Model_Objects::clearHistory(ObjectPtr theObj)
 247 {
 248   if (theObj) {
 249     const std::string aGroup = theObj->groupName();
 250     std::map<std::string, std::vector<ObjectPtr> >::iterator aHIter = myHistory.find(aGroup);
 251     if (aHIter != myHistory.end())
 252       myHistory.erase(aHIter); // erase from map => this means that it is not synchronized
 253     if (theObj->groupName() == ModelAPI_Feature::group()) { // clear results group of the feature
 254       FeaturePtr aFeature = std::dynamic_pointer_cast<ModelAPI_Feature>(theObj);
 255       std::string aResultGroup = featureResultGroup(aFeature);
 256       if (!aResultGroup.empty()) {
 257         std::map<std::string, std::vector<ObjectPtr> >::iterator aHIter =
 258           myHistory.find(aResultGroup);
 259         if (aHIter != myHistory.end())
 260           myHistory.erase(aHIter); // erase from map => this means that it is not synchronized
 261       }
 262     }
 263   }
 264 }
 265
 266 void Model_Objects::createHistory(const std::string& theGroupID)
 267 {
 268   std::map<std::string, std::vector<ObjectPtr> >::iterator aHIter = myHistory.find(theGroupID);
 269   if (aHIter == myHistory.end()) {
 270     myHistory[theGroupID] = std::vector<ObjectPtr>();
 271     std::vector<ObjectPtr>& aResult = myHistory[theGroupID];
 272     // iterate the array of references and get feature by feature from the array
 273     bool isFeature = theGroupID == ModelAPI_Feature::group();
 274     Handle(TDataStd_ReferenceArray) aRefs;
 275     if (featuresLabel().FindAttribute(TDataStd_ReferenceArray::GetID(), aRefs)) {
 276       for(int a = aRefs->Lower(); a <= aRefs->Upper(); a++) {
 277         FeaturePtr aFeature = feature(aRefs->Value(a));
 278         if (aFeature.get()) {
 279           if (isFeature) { // here may be also disabled features
 280             if (aFeature->isInHistory()) {
 281               aResult.push_back(aFeature);
 282             }
 283           } else if (!aFeature->isDisabled()) { // iterate all results of not-disabled feature
 284             const std::list<std::shared_ptr<ModelAPI_Result> >& aResults = aFeature->results();
 285             std::list<std::shared_ptr<ModelAPI_Result> >::const_iterator aRIter = aResults.begin();
 286             for (; aRIter != aResults.cend(); aRIter++) {
 287               ResultPtr aRes = *aRIter;
 288               if (aRes->groupName() != theGroupID) break; // feature have only same group results
 289               if (!aRes->isDisabled() && aRes->isInHistory() && !aRes->isConcealed()) {
 290                 aResult.push_back(*aRIter);
 291               }
 292             }
 293           }
 294         }
 295       }
 296     }
 297   }
 298 }
 299
 300 void Model_Objects::updateHistory(const std::shared_ptr<ModelAPI_Object> theObject)
 301 {
 302   clearHistory(theObject);
 303 }
 304
 305 void Model_Objects::updateHistory(const std::string theGroup)
 306 {
 307   std::map<std::string, std::vector<ObjectPtr> >::iterator aHIter = myHistory.find(theGroup);
 308   if (aHIter != myHistory.end())
 309     myHistory.erase(aHIter); // erase from map => this means that it is not synchronized
 310 }
 311
 312 FeaturePtr Model_Objects::feature(TDF_Label theLabel) const
 313 {
 314   if (myFeatures.IsBound(theLabel))
 315     return myFeatures.Find(theLabel);
 316   return FeaturePtr();  // not found
 317 }
 318
 319 ObjectPtr Model_Objects::object(TDF_Label theLabel)
 320 {
 321   // try feature by label
 322   FeaturePtr aFeature = feature(theLabel);
 323   if (aFeature)
 324     return feature(theLabel);
 325   TDF_Label aFeatureLabel = theLabel.Father().Father();  // let's suppose it is result
 326   aFeature = feature(aFeatureLabel);
 327   if (aFeature) {
 328     const std::list<std::shared_ptr<ModelAPI_Result> >& aResults = aFeature->results();
 329     std::list<std::shared_ptr<ModelAPI_Result> >::const_iterator aRIter = aResults.cbegin();
 330     for (; aRIter != aResults.cend(); aRIter++) {
 331       std::shared_ptr<Model_Data> aResData = std::dynamic_pointer_cast<Model_Data>(
 332           (*aRIter)->data());
 333       if (aResData->label().Father().IsEqual(theLabel))
 334         return *aRIter;
 335     }
 336   }
 337   return FeaturePtr();  // not found
 338 }
 339
 340 ObjectPtr Model_Objects::object(const std::string& theGroupID, const int theIndex)
 341 {
 342   createHistory(theGroupID);
 343   //TODO: mpv stabilization hotfix
 344   if (myHistory[theGroupID].size() <= theIndex)
 345     return ObjectPtr();
 346   return myHistory[theGroupID][theIndex];
 347 }
 348
 349 std::shared_ptr<ModelAPI_Object> Model_Objects::objectByName(
 350     const std::string& theGroupID, const std::string& theName)
 351 {
 352   createHistory(theGroupID);
 353   std::vector<ObjectPtr>& allObjs = myHistory[theGroupID];
 354   std::vector<ObjectPtr>::iterator anObjIter = allObjs.begin();
 355   for(; anObjIter != allObjs.end(); anObjIter++) {
 356     if ((*anObjIter)->data()->name() == theName)
 357       return *anObjIter;
 358   }
 359   // not found
 360   return ObjectPtr();
 361 }
 362
 363 const int Model_Objects::index(std::shared_ptr<ModelAPI_Object> theObject)
 364 {
 365   std::string aGroup = theObject->groupName();
 366   createHistory(aGroup);
 367   std::vector<ObjectPtr>& allObjs = myHistory[aGroup];
 368   std::vector<ObjectPtr>::iterator anObjIter = allObjs.begin(); // iterate to search object
 369   for(int anIndex = 0; anObjIter != allObjs.end(); anObjIter++, anIndex++) {
 370     if ((*anObjIter) == theObject)
 371       return anIndex;
 372   }
 373   // not found
 374   return -1;
 375 }
 376
 377 int Model_Objects::size(const std::string& theGroupID)
 378 {
 379   createHistory(theGroupID);
 380   return myHistory[theGroupID].size();
 381 }
 382
 383 void Model_Objects::allResults(const std::string& theGroupID, std::list<ResultPtr>& theResults)
 384 {
 385   // iterate the array of references and get feature by feature from the array
 386   Handle(TDataStd_ReferenceArray) aRefs;
 387   if (featuresLabel().FindAttribute(TDataStd_ReferenceArray::GetID(), aRefs)) {
 388     for(int a = aRefs->Lower(); a <= aRefs->Upper(); a++) {
 389       FeaturePtr aFeature = feature(aRefs->Value(a));
 390       if (aFeature.get()) {
 391         const std::list<std::shared_ptr<ModelAPI_Result> >& aResults = aFeature->results();
 392         std::list<std::shared_ptr<ModelAPI_Result> >::const_iterator aRIter = aResults.begin();
 393         for (; aRIter != aResults.cend(); aRIter++) {
 394           ResultPtr aRes = *aRIter;
 395           if (aRes->groupName() != theGroupID) break; // feature have only same group results
 396           if (aRes->isInHistory() && !aRes->isConcealed()) {
 397             theResults.push_back(*aRIter);
 398           }
 399         }
 400       }
 401     }
 402   }
 403 }
 404
 405
 406 TDF_Label Model_Objects::featuresLabel() const
 407 {
 408   return myMain.FindChild(TAG_OBJECTS);
 409 }
 410
 411 void Model_Objects::setUniqueName(FeaturePtr theFeature)
 412 {
 413   if (!theFeature->data()->name().empty())
 414     return;  // not needed, name is already defined
 415   std::string aName;  // result
 416   // first count all features of such kind to start with index = count + 1
 417   int aNumObjects = 0;
 418   NCollection_DataMap<TDF_Label, FeaturePtr>::Iterator aFIter(myFeatures);
 419   for (; aFIter.More(); aFIter.Next()) {
 420     if (aFIter.Value()->getKind() == theFeature->getKind())
 421       aNumObjects++;
 422   }
 423   // generate candidate name
 424   std::stringstream aNameStream;
 425   aNameStream << theFeature->getKind() << "_" << aNumObjects + 1;
 426   aName = aNameStream.str();
 427   // check this is unique, if not, increase index by 1
 428   for (aFIter.Initialize(myFeatures); aFIter.More();) {
 429     FeaturePtr aFeature = aFIter.Value();
 430     bool isSameName = aFeature->data()->name() == aName;
 431     if (!isSameName) {  // check also results to avoid same results names (actual for Parts)
 432       const std::list<std::shared_ptr<ModelAPI_Result> >& aResults = aFeature->results();
 433       std::list<std::shared_ptr<ModelAPI_Result> >::const_iterator aRIter = aResults.begin();
 434       for (; aRIter != aResults.cend(); aRIter++) {
 435         isSameName = (*aRIter)->data()->name() == aName;
 436       }
 437     }
 438     if (isSameName) {
 439       aNumObjects++;
 440       std::stringstream aNameStream;
 441       aNameStream << theFeature->getKind() << "_" << aNumObjects + 1;
 442       aName = aNameStream.str();
 443       // reinitialize iterator to make sure a new name is unique
 444       aFIter.Initialize(myFeatures);
 445     } else
 446       aFIter.Next();
 447   }
 448   theFeature->data()->setName(aName);
 449 }
 450
 451 void Model_Objects::initData(ObjectPtr theObj, TDF_Label theLab, const int theTag)
 452 {
 453   std::shared_ptr<Model_Data> aData(new Model_Data);
 454   aData->setLabel(theLab.FindChild(theTag));
 455   aData->setObject(theObj);
 456   theObj->setDoc(myDoc);
 457   theObj->setData(aData);
 458   FeaturePtr aFeature = std::dynamic_pointer_cast<ModelAPI_Feature>(theObj);
 459   if (aFeature) {
 460     setUniqueName(aFeature);  // must be before "initAttributes" because duplicate part uses name
 461   }
 462   theObj->initAttributes();
 463 }
 464
 465 void Model_Objects::synchronizeFeatures(
 466   const bool theMarkUpdated, const bool theUpdateReferences, const bool theFlush)
 467 {
 468   Model_Document* anOwner = std::dynamic_pointer_cast<Model_Document>(myDoc).get();
 469   if (!anOwner) // this may happen on creation of document: nothing there, so nothing to synchronize
 470     return;
 471   // after all updates, sends a message that groups of features were created or updated
 472   Events_Loop* aLoop = Events_Loop::loop();
 473   static Events_ID aDispEvent = aLoop->eventByName(EVENT_OBJECT_TO_REDISPLAY);
 474   static Events_ID aCreateEvent = Events_Loop::eventByName(EVENT_OBJECT_CREATED);
 475   static Events_ID anUpdateEvent = Events_Loop::eventByName(EVENT_OBJECT_UPDATED);
 476   static Events_ID aRedispEvent = aLoop->eventByName(EVENT_OBJECT_TO_REDISPLAY);
 477   static Events_ID aDeleteEvent = Events_Loop::eventByName(EVENT_OBJECT_DELETED);
 478   static Events_ID aToHideEvent = aLoop->eventByName(EVENT_OBJECT_TO_REDISPLAY);
 479   bool isActive = aLoop->activateFlushes(false);
 480
 481   // update all objects by checking are they on labels or not
 482   std::set<FeaturePtr> aNewFeatures, aKeptFeatures;
 483   TDF_ChildIDIterator aLabIter(featuresLabel(), TDataStd_Comment::GetID());
 484   for (; aLabIter.More(); aLabIter.Next()) {
 485     TDF_Label aFeatureLabel = aLabIter.Value()->Label();
 486     FeaturePtr aFeature;
 487     if (!myFeatures.IsBound(aFeatureLabel)) {  // a new feature is inserted
 488       // create a feature
 489       aFeature = std::dynamic_pointer_cast<Model_Session>(ModelAPI_Session::get())->createFeature(
 490         TCollection_AsciiString(Handle(TDataStd_Comment)::DownCast(aLabIter.Value())->Get())
 491         .ToCString(), anOwner);
 492       if (!aFeature) {  // somethig is wrong, most probably, the opened document has invalid structure
 493         Events_Error::send("Invalid type of object in the document");
 494         aLabIter.Value()->Label().ForgetAllAttributes();
 495         continue;
 496       }
 497       // this must be before "setData" to redo the sketch line correctly
 498       myFeatures.Bind(aFeatureLabel, aFeature);
 499       aNewFeatures.insert(aFeature);
 500       initData(aFeature, aFeatureLabel, TAG_FEATURE_ARGUMENTS);
 501       updateHistory(aFeature);
 502       aFeature->setDisabled(false); // by default created feature is enabled (this allows to recreate the results before "setCurrent" is called)
 503
 504       // event: model is updated
 505       ModelAPI_EventCreator::get()->sendUpdated(aFeature, aCreateEvent);
 506     } else {  // nothing is changed, both iterators are incremented
 507       aFeature = myFeatures.Find(aFeatureLabel);
 508       aKeptFeatures.insert(aFeature);
 509       if (theMarkUpdated) {
 510         ModelAPI_EventCreator::get()->sendUpdated(aFeature, anUpdateEvent);
 511       }
 512     }
 513   }
 514   // update results of the features (after features created because they may be connected, like sketch and sub elements)
 515   std::list<FeaturePtr> aComposites; // composites must be updated after their subs (issue 360)
 516   TDF_ChildIDIterator aLabIter2(featuresLabel(), TDataStd_Comment::GetID());
 517   for (; aLabIter2.More(); aLabIter2.Next()) {
 518     TDF_Label aFeatureLabel = aLabIter2.Value()->Label();
 519     if (myFeatures.IsBound(aFeatureLabel)) {  // a new feature is inserted
 520       FeaturePtr aFeature = myFeatures.Find(aFeatureLabel);
 521       if (std::dynamic_pointer_cast<ModelAPI_CompositeFeature>(aFeature).get())
 522         aComposites.push_back(aFeature);
 523       updateResults(aFeature);
 524     }
 525   }
 526   std::list<FeaturePtr>::iterator aComposite = aComposites.begin();
 527   for(; aComposite != aComposites.end(); aComposite++) {
 528     updateResults(*aComposite);
 529   }
 530
 531   // check all features are checked: if not => it was removed
 532   NCollection_DataMap<TDF_Label, FeaturePtr>::Iterator aFIter(myFeatures);
 533   while (aFIter.More()) {
 534     if (aKeptFeatures.find(aFIter.Value()) == aKeptFeatures.end()
 535       && aNewFeatures.find(aFIter.Value()) == aNewFeatures.end()) {
 536         FeaturePtr aFeature = aFIter.Value();
 537         // event: model is updated
 538         //if (aFeature->isInHistory()) {
 539         ModelAPI_EventCreator::get()->sendDeleted(myDoc, ModelAPI_Feature::group());
 540         //}
 541         // results of this feature must be redisplayed (hided)
 542         // redisplay also removed feature (used for sketch and AISObject)
 543         ModelAPI_EventCreator::get()->sendUpdated(aFeature, aRedispEvent);
 544         updateHistory(aFeature);
 545         aFeature->erase();
 546         // unbind after the "erase" call: on abort sketch is removes sub-objects that corrupts aFIter
 547         myFeatures.UnBind(aFIter.Key());
 548         // reinitialize iterator because unbind may corrupt the previous order in the map
 549         aFIter.Initialize(myFeatures);
 550     } else
 551       aFIter.Next();
 552   }
 553
 554   if (theUpdateReferences) {
 555     synchronizeBackRefs();
 556   }
 557   if (theMarkUpdated) { // this means there is no control what was modified => remove history cash
 558     myHistory.clear();
 559   }
 560
 561   anOwner->executeFeatures() = false;
 562   aLoop->activateFlushes(isActive);
 563
 564   if (theFlush) {
 565     aLoop->flush(aCreateEvent);
 566     aLoop->flush(aDeleteEvent);
 567     aLoop->flush(anUpdateEvent);
 568     aLoop->flush(aRedispEvent);
 569     aLoop->flush(aToHideEvent);
 570   }
 571   anOwner->executeFeatures() = true;
 572 }
 573
 574 void Model_Objects::synchronizeBackRefs()
 575 {
 576   // keeps the concealed flags of result to catch the change and create created/deleted events
 577   std::list<std::pair<ResultPtr, bool> > aConcealed;
 578   // first cycle: erase all data about back-references
 579   NCollection_DataMap<TDF_Label, FeaturePtr>::Iterator aFeatures(myFeatures);
 580   for(; aFeatures.More(); aFeatures.Next()) {
 581     FeaturePtr aFeature = aFeatures.Value();
 582     std::shared_ptr<Model_Data> aFData =
 583       std::dynamic_pointer_cast<Model_Data>(aFeature->data());
 584     if (aFData) {
 585       aFData->eraseBackReferences();
 586     }
 587     const std::list<std::shared_ptr<ModelAPI_Result> >& aResults = aFeature->results();
 588     std::list<std::shared_ptr<ModelAPI_Result> >::const_iterator aRIter = aResults.begin();
 589     for (; aRIter != aResults.cend(); aRIter++) {
 590       std::shared_ptr<Model_Data> aResData =
 591         std::dynamic_pointer_cast<Model_Data>((*aRIter)->data());
 592       if (aResData) {
 593         aConcealed.push_back(std::pair<ResultPtr, bool>(*aRIter, (*aRIter)->isConcealed()));
 594         aResData->eraseBackReferences();
 595       }
 596     }
 597   }
 598
 599   // second cycle: set new back-references: only features may have reference, iterate only them
 600   ModelAPI_ValidatorsFactory* aValidators = ModelAPI_Session::get()->validators();
 601   for(aFeatures.Initialize(myFeatures); aFeatures.More(); aFeatures.Next()) {
 602     FeaturePtr aFeature = aFeatures.Value();
 603     std::shared_ptr<Model_Data> aFData =
 604       std::dynamic_pointer_cast<Model_Data>(aFeature->data());
 605     if (aFData) {
 606       std::list<std::pair<std::string, std::list<ObjectPtr> > > aRefs;
 607       aFData->referencesToObjects(aRefs);
 608       std::list<std::pair<std::string, std::list<ObjectPtr> > >::iterator
 609         aRefsIter = aRefs.begin();
 610       for(; aRefsIter != aRefs.end(); aRefsIter++) {
 611         std::list<ObjectPtr>::iterator aRefTo = aRefsIter->second.begin();
 612         for(; aRefTo != aRefsIter->second.end(); aRefTo++) {
 613           if (*aRefTo) {
 614             std::shared_ptr<Model_Data> aRefData =
 615               std::dynamic_pointer_cast<Model_Data>((*aRefTo)->data());
 616             aRefData->addBackReference(aFeature, aRefsIter->first); // here the Concealed flag is updated
 617             // update enable/disable status: the nested status must be equal to the composite
 618             CompositeFeaturePtr aComp =
 619               std::dynamic_pointer_cast<ModelAPI_CompositeFeature>(aFeature);
 620             if (aComp.get()) {
 621               FeaturePtr aReferenced = std::dynamic_pointer_cast<ModelAPI_Feature>(*aRefTo);
 622               if (aReferenced.get()) {
 623                 aReferenced->setDisabled(aComp->isDisabled());
 624               }
 625             }
 626           }
 627         }
 628       }
 629     }
 630   }
 631   std::list<std::pair<ResultPtr, bool> >::iterator aCIter = aConcealed.begin();
 632   for(; aCIter != aConcealed.end(); aCIter++) {
 633     if (aCIter->first->isConcealed() != aCIter->second) { // somethign is changed => produce event
 634       if (aCIter->second) { // was concealed become not => creation event
 635         static Events_ID anEvent = Events_Loop::eventByName(EVENT_OBJECT_CREATED);
 636         ModelAPI_EventCreator::get()->sendUpdated(aCIter->first, anEvent);
 637       } else { // was not concealed become concealed => delete event
 638         ModelAPI_EventCreator::get()->sendDeleted(myDoc, aCIter->first->groupName());
 639         // redisplay for the viewer (it must be disappeared also)
 640         static Events_ID EVENT_DISP =
 641           Events_Loop::loop()->eventByName(EVENT_OBJECT_TO_REDISPLAY);
 642         ModelAPI_EventCreator::get()->sendUpdated(aCIter->first, EVENT_DISP);
 643       }
 644     }
 645   }
 646 }
 647
 648 TDF_Label Model_Objects::resultLabel(
 649   const std::shared_ptr<ModelAPI_Data>& theFeatureData, const int theResultIndex)
 650 {
 651   const std::shared_ptr<Model_Data>& aData =
 652     std::dynamic_pointer_cast<Model_Data>(theFeatureData);
 653   return aData->label().Father().FindChild(TAG_FEATURE_RESULTS).FindChild(theResultIndex + 1);
 654 }
 655
 656 void Model_Objects::storeResult(std::shared_ptr<ModelAPI_Data> theFeatureData,
 657                                  std::shared_ptr<ModelAPI_Result> theResult,
 658                                  const int theResultIndex)
 659 {
 660   theResult->setDoc(myDoc);
 661   initData(theResult, resultLabel(theFeatureData, theResultIndex), TAG_FEATURE_ARGUMENTS);
 662   if (theResult->data()->name().empty()) {  // if was not initialized, generate event and set a name
 663     std::stringstream aNewName;
 664     aNewName<<theFeatureData->name();
 665     if (theResultIndex > 0) // if there are several results, add unique prefix starting from second
 666       aNewName<<"_"<<theResultIndex + 1;
 667     theResult->data()->setName(aNewName.str());
 668   }
 669 }
 670
 671 std::shared_ptr<ModelAPI_ResultConstruction> Model_Objects::createConstruction(
 672     const std::shared_ptr<ModelAPI_Data>& theFeatureData, const int theIndex)
 673 {
 674   TDF_Label aLab = resultLabel(theFeatureData, theIndex);
 675   TDataStd_Comment::Set(aLab, ModelAPI_ResultConstruction::group().c_str());
 676   ObjectPtr anOldObject = object(aLab);
 677   std::shared_ptr<ModelAPI_ResultConstruction> aResult;
 678   if (anOldObject) {
 679     aResult = std::dynamic_pointer_cast<ModelAPI_ResultConstruction>(anOldObject);
 680   }
 681   if (!aResult) {
 682     aResult = std::shared_ptr<ModelAPI_ResultConstruction>(new Model_ResultConstruction);
 683     storeResult(theFeatureData, aResult, theIndex);
 684   }
 685   return aResult;
 686 }
 687
 688 std::shared_ptr<ModelAPI_ResultBody> Model_Objects::createBody(
 689     const std::shared_ptr<ModelAPI_Data>& theFeatureData, const int theIndex)
 690 {
 691   TDF_Label aLab = resultLabel(theFeatureData, theIndex);
 692   TDataStd_Comment::Set(aLab, ModelAPI_ResultBody::group().c_str());
 693   ObjectPtr anOldObject = object(aLab);
 694   std::shared_ptr<ModelAPI_ResultBody> aResult;
 695   if (anOldObject) {
 696     aResult = std::dynamic_pointer_cast<ModelAPI_ResultBody>(anOldObject);
 697   }
 698   if (!aResult) {
 699     aResult = std::shared_ptr<ModelAPI_ResultBody>(new Model_ResultBody);
 700     storeResult(theFeatureData, aResult, theIndex);
 701   }
 702   return aResult;
 703 }
 704
 705 std::shared_ptr<ModelAPI_ResultPart> Model_Objects::createPart(
 706     const std::shared_ptr<ModelAPI_Data>& theFeatureData, const int theIndex)
 707 {
 708   TDF_Label aLab = resultLabel(theFeatureData, theIndex);
 709   TDataStd_Comment::Set(aLab, ModelAPI_ResultPart::group().c_str());
 710   ObjectPtr anOldObject = object(aLab);
 711   std::shared_ptr<ModelAPI_ResultPart> aResult;
 712   if (anOldObject) {
 713     aResult = std::dynamic_pointer_cast<ModelAPI_ResultPart>(anOldObject);
 714   }
 715   if (!aResult) {
 716     aResult = std::shared_ptr<ModelAPI_ResultPart>(new Model_ResultPart);
 717     storeResult(theFeatureData, aResult, theIndex);
 718   }
 719   return aResult;
 720 }
 721
 722 std::shared_ptr<ModelAPI_ResultGroup> Model_Objects::createGroup(
 723     const std::shared_ptr<ModelAPI_Data>& theFeatureData, const int theIndex)
 724 {
 725   TDF_Label aLab = resultLabel(theFeatureData, theIndex);
 726   TDataStd_Comment::Set(aLab, ModelAPI_ResultGroup::group().c_str());
 727   ObjectPtr anOldObject = object(aLab);
 728   std::shared_ptr<ModelAPI_ResultGroup> aResult;
 729   if (anOldObject) {
 730     aResult = std::dynamic_pointer_cast<ModelAPI_ResultGroup>(anOldObject);
 731   }
 732   if (!aResult) {
 733     aResult = std::shared_ptr<ModelAPI_ResultGroup>(new Model_ResultGroup(theFeatureData));
 734     storeResult(theFeatureData, aResult, theIndex);
 735   }
 736   return aResult;
 737 }
 738
 739 std::shared_ptr<ModelAPI_ResultParameter> Model_Objects::createParameter(
 740       const std::shared_ptr<ModelAPI_Data>& theFeatureData, const int theIndex)
 741 {
 742   TDF_Label aLab = resultLabel(theFeatureData, theIndex);
 743   TDataStd_Comment::Set(aLab, ModelAPI_ResultParameter::group().c_str());
 744   ObjectPtr anOldObject = object(aLab);
 745   std::shared_ptr<ModelAPI_ResultParameter> aResult;
 746   if (anOldObject) {
 747     aResult = std::dynamic_pointer_cast<ModelAPI_ResultParameter>(anOldObject);
 748   }
 749   if (!aResult) {
 750     aResult = std::shared_ptr<ModelAPI_ResultParameter>(new Model_ResultParameter);
 751     storeResult(theFeatureData, aResult, theIndex);
 752   }
 753   return aResult;
 754 }
 755
 756 std::shared_ptr<ModelAPI_Feature> Model_Objects::feature(
 757     const std::shared_ptr<ModelAPI_Result>& theResult)
 758 {
 759   std::shared_ptr<Model_Data> aData = std::dynamic_pointer_cast<Model_Data>(theResult->data());
 760   if (aData) {
 761     TDF_Label aFeatureLab = aData->label().Father().Father().Father();
 762     return feature(aFeatureLab);
 763   }
 764   return FeaturePtr();
 765 }
 766
 767 std::string Model_Objects::featureResultGroup(FeaturePtr theFeature)
 768 {
 769   if (theFeature->data()->isValid()) {
 770     TDF_ChildIterator aLabIter(resultLabel(theFeature->data(), 0).Father());
 771     if (aLabIter.More()) {
 772       TDF_Label anArgLab = aLabIter.Value();
 773       Handle(TDataStd_Comment) aGroup;
 774       if (aLabIter.Value().FindAttribute(TDataStd_Comment::GetID(), aGroup)) {
 775         return TCollection_AsciiString(aGroup->Get()).ToCString();
 776       }
 777     }
 778   }
 779   static std::string anEmpty;
 780   return anEmpty; // not found
 781 }
 782
 783 void Model_Objects::updateResults(FeaturePtr theFeature)
 784 {
 785   // for not persistent is will be done by parametric updater automatically
 786   //if (!theFeature->isPersistentResult()) return;
 787   // check the existing results and remove them if there is nothing on the label
 788   std::list<ResultPtr>::const_iterator aResIter = theFeature->results().cbegin();
 789   while(aResIter != theFeature->results().cend()) {
 790     ResultPtr aBody = std::dynamic_pointer_cast<ModelAPI_Result>(*aResIter);
 791     if (aBody.get()) {
 792       if (!aBody->data()->isValid()) {
 793         // found a disappeared result => remove it
 794         theFeature->eraseResultFromList(aBody);
 795         // start iterate from beginning because iterator is corrupted by removing
 796         aResIter = theFeature->results().cbegin();
 797         continue;
 798       }
 799     }
 800     aResIter++;
 801   }
 802   // it may be on undo
 803   if (!theFeature->data() || !theFeature->data()->isValid() || theFeature->isDisabled())
 804     return;
 805   // check that results are presented on all labels
 806   int aResSize = theFeature->results().size();
 807   TDF_ChildIterator aLabIter(resultLabel(theFeature->data(), 0).Father());
 808   for(; aLabIter.More(); aLabIter.Next()) {
 809     // here must be GUID of the feature
 810     int aResIndex = aLabIter.Value().Tag() - 1;
 811     ResultPtr aNewBody;
 812     if (aResSize <= aResIndex) {
 813       TDF_Label anArgLab = aLabIter.Value();
 814       Handle(TDataStd_Comment) aGroup;
 815       if (anArgLab.FindAttribute(TDataStd_Comment::GetID(), aGroup)) {
 816         if (aGroup->Get() == ModelAPI_ResultBody::group().c_str()) {
 817           aNewBody = createBody(theFeature->data(), aResIndex);
 818         } else if (aGroup->Get() == ModelAPI_ResultPart::group().c_str()) {
 819           //aNewBody = createPart(theFeature->data(), aResIndex);
 820           theFeature->execute(); // create the part result
 821           break;
 822         } else if (aGroup->Get() == ModelAPI_ResultConstruction::group().c_str()) {
 823           theFeature->execute(); // construction shapes are needed for sketch solver
 824           break;
 825         } else if (aGroup->Get() == ModelAPI_ResultGroup::group().c_str()) {
 826           aNewBody = createGroup(theFeature->data(), aResIndex);
 827         } else if (aGroup->Get() == ModelAPI_ResultParameter::group().c_str()) {
 828           theFeature->attributeChanged("expression"); // just produce a value
 829           break;
 830         } else {
 831           Events_Error::send(std::string("Unknown type of result is found in the document:") +
 832             TCollection_AsciiString(aGroup->Get()).ToCString());
 833         }
 834       }
 835       if (aNewBody) {
 836         theFeature->setResult(aNewBody, aResIndex);
 837       }
 838     }
 839   }
 840 }
 841
 842 ResultPtr Model_Objects::findByName(const std::string theName)
 843 {
 844   NCollection_DataMap<TDF_Label, FeaturePtr>::Iterator anObjIter(myFeatures);
 845   for(; anObjIter.More(); anObjIter.Next()) {
 846     FeaturePtr& aFeature = anObjIter.ChangeValue();
 847     if (!aFeature.get() || aFeature->isDisabled()) // may be on close
 848       continue;
 849     const std::list<std::shared_ptr<ModelAPI_Result> >& aResults = aFeature->results();
 850     std::list<std::shared_ptr<ModelAPI_Result> >::const_iterator aRIter = aResults.begin();
 851     for (; aRIter != aResults.cend(); aRIter++) {
 852       ResultPtr aRes = *aRIter;
 853       if (aRes.get() && aRes->data() && aRes->data()->isValid() && !aRes->isDisabled() &&
 854           aRes->data()->name() == theName) {
 855         return aRes;
 856       }
 857     }
 858   }
 859   // not found
 860   return ResultPtr();
 861 }
 862
 863 FeaturePtr Model_Objects::nextFeature(FeaturePtr theCurrent, const bool theReverse)
 864 {
 865   std::shared_ptr<Model_Data> aData = std::static_pointer_cast<Model_Data>(theCurrent->data());
 866   if (aData && aData->isValid()) {
 867     TDF_Label aFeatureLabel = aData->label().Father();
 868     Handle(TDataStd_ReferenceArray) aRefs;
 869     if (featuresLabel().FindAttribute(TDataStd_ReferenceArray::GetID(), aRefs)) {
 870       for(int a = aRefs->Lower(); a <= aRefs->Upper(); a++) { // iterate all existing features
 871         if (aRefs->Value(a).IsEqual(aFeatureLabel)) {
 872           a += theReverse ? -1 : 1;
 873           if (a >= aRefs->Lower() && a <= aRefs->Upper())
 874             return feature(aRefs->Value(a));
 875           break; // finish iiteration: it's last feature
 876         }
 877       }
 878     }
 879   }
 880   return FeaturePtr(); // not found, last, or something is wrong
 881 }
 882
 883 FeaturePtr Model_Objects::firstFeature()
 884 {
 885   Handle(TDataStd_ReferenceArray) aRefs;
 886   if (featuresLabel().FindAttribute(TDataStd_ReferenceArray::GetID(), aRefs)) {
 887     return feature(aRefs->Value(aRefs->Lower()));
 888   }
 889   return FeaturePtr(); // no features at all
 890 }
 891
 892 FeaturePtr Model_Objects::lastFeature()
 893 {
 894   Handle(TDataStd_ReferenceArray) aRefs;
 895   if (featuresLabel().FindAttribute(TDataStd_ReferenceArray::GetID(), aRefs)) {
 896     return feature(aRefs->Value(aRefs->Upper()));
 897   }
 898   return FeaturePtr(); // no features at all
 899 }
 900
 901 std::list<std::shared_ptr<ModelAPI_Feature> > Model_Objects::allFeatures()
 902 {
 903   std::list<std::shared_ptr<ModelAPI_Feature> > aResult;
 904   Handle(TDataStd_ReferenceArray) aRefs;
 905   if (featuresLabel().FindAttribute(TDataStd_ReferenceArray::GetID(), aRefs)) {
 906     for(int a = aRefs->Lower(); a <= aRefs->Upper(); a++) {
 907       FeaturePtr aFeature = feature(aRefs->Value(a));
 908       if (aFeature.get())
 909         aResult.push_back(aFeature);
 910     }
 911   }
 912   return aResult;
 913 }
 914
 915 Standard_Integer HashCode(const TDF_Label& theLab, const Standard_Integer theUpper)
 916 {
 917   return TDF_LabelMapHasher::HashCode(theLab, theUpper);
 918
 919 }
 920 Standard_Boolean IsEqual(const TDF_Label& theLab1, const TDF_Label& theLab2)
 921 {
 922   return TDF_LabelMapHasher::IsEqual(theLab1, theLab2);
 923 }