From 2760e152b279ea889b7839e263071c6875d5f073 Mon Sep 17 00:00:00 2001
From: mpv <mikhail.ponikarov@opencascade.com>
Date: Wed, 17 Sep 2014 10:38:18 +0400
Subject: [PATCH] Fixed crash with abort of sketch in the Part document

---
 src/Model/Model_Document.cpp      | 14 ++++++++------
 src/Model/Model_Document.h        |  5 +++--
 src/ModelAPI/ModelAPI_Feature.cpp | 16 ++++++++++------
 3 files changed, 21 insertions(+), 14 deletions(-)

diff --git a/src/Model/Model_Document.cpp b/src/Model/Model_Document.cpp
index cb5d28394..9057ab82f 100644
--- a/src/Model/Model_Document.cpp
+++ b/src/Model/Model_Document.cpp
@@ -224,9 +224,9 @@ void Model_Document::startOperation()
       myNestedNum = 0;
       myDoc->InitDeltaCompaction();
     }
-    myIsEmptyTr[myTransactionsAfterSave] = false;
+    myIsEmptyTr[myTransactionsAfterSave] = !myDoc->CommitCommand();
     myTransactionsAfterSave++;
-    myDoc->NewCommand();
+    myDoc->OpenCommand();
   } else {  // start the simple command
     myDoc->NewCommand();
   }
@@ -236,7 +236,7 @@ void Model_Document::startOperation()
     subDoc(*aSubIter)->startOperation();
 }
 
-void Model_Document::compactNested()
+bool Model_Document::compactNested()
 {
   bool allWasEmpty = true;
   while (myNestedNum != -1) {
@@ -250,6 +250,7 @@ void Model_Document::compactNested()
   myIsEmptyTr[myTransactionsAfterSave] = allWasEmpty;
   myTransactionsAfterSave++;
   myDoc->PerformDeltaCompaction();
+  return !allWasEmpty;
 }
 
 void Model_Document::finishOperation()
@@ -291,9 +292,10 @@ void Model_Document::abortOperation()
 {
   if (myNestedNum > 0 && !myDoc->HasOpenCommand()) {  // abort all what was done in nested
       // first compact all nested
-    compactNested();
-    // for nested it is undo and clear redos
-    myDoc->Undo();
+    if (compactNested()) {
+      // for nested it is undo and clear redos
+      myDoc->Undo();
+    }
     myDoc->ClearRedos();
     myTransactionsAfterSave--;
     myIsEmptyTr.erase(myTransactionsAfterSave);
diff --git a/src/Model/Model_Document.h b/src/Model/Model_Document.h
index 598c3b633..f9bbd0809 100644
--- a/src/Model/Model_Document.h
+++ b/src/Model/Model_Document.h
@@ -145,8 +145,9 @@ class Model_Document : public ModelAPI_Document
     return myDoc;
   }
 
-  //! performas compactification of all nested operations into one
-  void compactNested();
+  //! performs compactification of all nested operations into one
+  //! \returns true if resulting transaction is not empty and can be undoed
+  bool compactNested();
 
   //! Initializes the data fields of the feature
   void initData(ObjectPtr theObj, TDF_Label theLab, const int theTag);
diff --git a/src/ModelAPI/ModelAPI_Feature.cpp b/src/ModelAPI/ModelAPI_Feature.cpp
index a34d71bc5..aec952e79 100644
--- a/src/ModelAPI/ModelAPI_Feature.cpp
+++ b/src/ModelAPI/ModelAPI_Feature.cpp
@@ -77,13 +77,17 @@ void ModelAPI_Feature::removeResult(const boost::shared_ptr<ModelAPI_Result>& th
 
 void ModelAPI_Feature::eraseResults()
 {
-  std::list<boost::shared_ptr<ModelAPI_Result> >::iterator aResIter = myResults.begin();
-  for(; aResIter != myResults.end(); aResIter++) {
-      (*aResIter)->data()->erase();
-      static Events_ID anEvent = Events_Loop::eventByName(EVENT_OBJECT_DELETED);
-      ModelAPI_EventCreator::get()->sendDeleted(document(), (*aResIter)->groupName());
+  if (!myResults.empty()) {
+    static Events_ID anEvent = Events_Loop::eventByName(EVENT_OBJECT_DELETED);
+    std::list<boost::shared_ptr<ModelAPI_Result> >::iterator aResIter = myResults.begin();
+    for(; aResIter != myResults.end(); aResIter++) {
+        (*aResIter)->data()->erase();
+        ModelAPI_EventCreator::get()->sendDeleted(document(), (*aResIter)->groupName());
+    }
+    myResults.clear();
+    // flush it to avoid left presentations after input of invalid arguments (radius=0)
+    Events_Loop::loop()->flush(anEvent);
   }
-  myResults.clear();
 }
 
 boost::shared_ptr<ModelAPI_Document> ModelAPI_Feature::documentToAdd()
-- 
2.39.2