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Issue #3086: Avoid crash when FeatureInfo is null.
[modules/shaper.git] / src / ModuleBase / ModuleBase_ViewerPrs.cpp
1 // Copyright (C) 2014-2019  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 email : webmaster.salome@opencascade.com
18 //
19
20 #include "ModuleBase_ViewerPrs.h"
21
22 #include <ModuleBase_ResultPrs.h>
23 #include <StdSelect_BRepOwner.hxx>
24
25 ModuleBase_ViewerPrs::ModuleBase_ViewerPrs(ObjectPtr theResult,
26                                            const GeomShapePtr& theShape,
27                                            Handle(SelectMgr_EntityOwner) theOwner)
28 : myResult(theResult),
29   myShape(theShape),
30   myOwner(theOwner)
31 {
32 }
33
34 ModuleBase_ViewerPrs::~ModuleBase_ViewerPrs()
35 {
36 }
37
38 bool ModuleBase_ViewerPrs::isEqual(ModuleBase_ViewerPrs* thePrs) const
39 {
40   if (!thePrs || thePrs->isEmpty())
41     return false;
42
43   bool isEqualResult = (myResult.get() == thePrs->object().get());
44   bool isEqualShape = (!myShape.get() && !thePrs->shape().get()) ||
45                        (myShape.get() && myShape->isEqual(thePrs->shape()));
46   bool isEqualIO = (myInteractive == thePrs->interactive()) == Standard_True;
47
48   bool isEqualOwner = myOwner.get() == thePrs->owner().get();
49   if (isEqualResult && isEqualShape && isEqualIO &&
50       !isEqualOwner) { /// owners are different
51     // as we might loading object with the same shape in different modes like
52     // "objects" and "other", it is possible that two owners are created linked
53     // to one shape. We should accept such ViewerPrs as equal to current in order
54     // to do not use the same <result, shape> twice
55     Handle(StdSelect_BRepOwner) anOwner1 = Handle(StdSelect_BRepOwner)::DownCast(myOwner);
56     Handle(StdSelect_BRepOwner) anOwner2 = Handle(StdSelect_BRepOwner)::DownCast(thePrs->owner());
57     if (!anOwner1.IsNull() && !anOwner2.IsNull())
58       isEqualOwner = (anOwner1->Shape().IsNull() && anOwner2->Shape().IsNull()) ||
59                       anOwner1->Shape().IsEqual(anOwner2->Shape());
60   }
61
62   if (isEqualResult && isEqualShape &&
63       !isEqualIO) { /// AIS are different
64     // check that the owner is a fictive owner for compsolid object, created in the
65     // ComputeSelection of ModuleBase_ResultPrs. A new owner is created there for each subsolid
66     // and set in the sub-solid AIS. ViewerPrs of these fictive owners are accepted as equal
67     // as they use the same shape and result(of compsolid)
68     Handle(StdSelect_BRepOwner) aCSolidOwner1 = Handle(StdSelect_BRepOwner)::DownCast(myOwner);
69     Handle(StdSelect_BRepOwner) aCSolidOwner2 =
70       Handle(StdSelect_BRepOwner)::DownCast(thePrs->owner());
71     isEqualIO = !aCSolidOwner1.IsNull() && !aCSolidOwner2.IsNull();
72     if (!aCSolidOwner1.IsNull() && !aCSolidOwner2.IsNull())
73       isEqualOwner = (aCSolidOwner1->Shape().IsNull() && aCSolidOwner2->Shape().IsNull()) ||
74                       aCSolidOwner1->Shape().IsEqual(aCSolidOwner2->Shape());
75   }
76
77   return isEqualResult && isEqualShape && isEqualOwner && isEqualIO;
78 }
79
80 bool ModuleBase_ViewerPrs::operator==(const ModuleBase_ViewerPrs& thePrs)
81 {
82   if (thePrs.isEmpty())
83     return false;
84
85   bool isEqualResult = (myResult.get() == thePrs.object().get());
86   bool isEqualShape = (!myShape.get() && !thePrs.shape().get()) ||
87                        (myShape.get() && myShape->isEqual(thePrs.shape()));
88   bool isEqualIO = (myInteractive == thePrs.interactive()) == Standard_True;
89
90   bool isEqualOwner = myOwner.get() == thePrs.owner().get();
91   if (isEqualResult && isEqualShape && isEqualIO &&
92       !isEqualOwner) { /// owners are different
93     // as we might loading object with the same shape in different modes like
94     // "objects" and "other", it is possible that two owners are created linked
95     // to one shape. We should accept such ViewerPrs as equal to current in order
96     // to do not use the same <result, shape> twice
97     Handle(StdSelect_BRepOwner) anOwner1 = Handle(StdSelect_BRepOwner)::DownCast(myOwner);
98     Handle(StdSelect_BRepOwner) anOwner2 = Handle(StdSelect_BRepOwner)::DownCast(thePrs.owner());
99     if (!anOwner1.IsNull() && !anOwner2.IsNull())
100       isEqualOwner = (anOwner1->Shape().IsNull() && anOwner2->Shape().IsNull()) ||
101                       anOwner1->Shape().IsEqual(anOwner2->Shape());
102   }
103
104   if (isEqualResult && isEqualShape &&
105       !isEqualIO) { /// AIS are different
106     // check that the owner is a fictive owner for compsolid object, created in the
107     // ComputeSelection of ModuleBase_ResultPrs. A new owner is created there for each subsolid
108     // and set in the sub-solid AIS. ViewerPrs of these fictive owners are accepted as equal
109     // as they use the same shape and result(of compsolid)
110     Handle(StdSelect_BRepOwner) aCSolidOwner1 = Handle(StdSelect_BRepOwner)::DownCast(myOwner);
111     Handle(StdSelect_BRepOwner) aCSolidOwner2 =
112       Handle(StdSelect_BRepOwner)::DownCast(thePrs.owner());
113     isEqualIO = !aCSolidOwner1.IsNull() && !aCSolidOwner2.IsNull();
114     if (!aCSolidOwner1.IsNull() && !aCSolidOwner1.IsNull())
115       isEqualOwner = (aCSolidOwner1->Shape().IsNull() && aCSolidOwner2->Shape().IsNull()) ||
116                       aCSolidOwner1->Shape().IsEqual(aCSolidOwner2->Shape());
117   }
118
119   return isEqualResult && isEqualShape && isEqualOwner && isEqualIO;
120 }