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