Bug Summary

File:home/maarten/src/libreoffice/core/include/tools/ref.hxx
Warning:line 56, column 30
Use of memory after it is freed

Annotated Source Code

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clang -cc1 -cc1 -triple x86_64-unknown-linux-gnu -analyze -disable-free -disable-llvm-verifier -discard-value-names -main-file-name seltrans.cxx -analyzer-store=region -analyzer-opt-analyze-nested-blocks -analyzer-checker=core -analyzer-checker=apiModeling -analyzer-checker=unix -analyzer-checker=deadcode -analyzer-checker=cplusplus -analyzer-checker=security.insecureAPI.UncheckedReturn -analyzer-checker=security.insecureAPI.getpw -analyzer-checker=security.insecureAPI.gets -analyzer-checker=security.insecureAPI.mktemp -analyzer-checker=security.insecureAPI.mkstemp -analyzer-checker=security.insecureAPI.vfork -analyzer-checker=nullability.NullPassedToNonnull -analyzer-checker=nullability.NullReturnedFromNonnull -analyzer-output plist -w -setup-static-analyzer -mrelocation-model pic -pic-level 2 -mframe-pointer=all -fmath-errno -fno-rounding-math -mconstructor-aliases -munwind-tables -target-cpu x86-64 -fno-split-dwarf-inlining -debugger-tuning=gdb -resource-dir /usr/lib64/clang/11.0.0 -isystem /usr/include/libxml2 -D BOOST_ERROR_CODE_HEADER_ONLY -D BOOST_SYSTEM_NO_DEPRECATED -D CPPU_ENV=gcc3 -D LINUX -D OSL_DEBUG_LEVEL=1 -D SAL_LOG_INFO -D SAL_LOG_WARN -D UNIX -D UNX -D X86_64 -D _PTHREADS -D _REENTRANT -D SC_DLLIMPLEMENTATION -D SC_INFO_OSVERSION="LINUX" -D SYSTEM_LIBXML -D EXCEPTIONS_ON -D LIBO_INTERNAL_ONLY -I /home/maarten/src/libreoffice/core/workdir/UnpackedTarball/liborcus/include -I /home/maarten/src/libreoffice/core/workdir/UnpackedTarball/mdds/include -I /home/maarten/src/libreoffice/core/workdir/UnpackedTarball/icu/source -I /home/maarten/src/libreoffice/core/workdir/UnpackedTarball/icu/source/i18n -I /home/maarten/src/libreoffice/core/workdir/UnpackedTarball/icu/source/common -I /home/maarten/src/libreoffice/core/external/clew/source/include -I /home/maarten/src/libreoffice/core/external/boost/include -I /home/maarten/src/libreoffice/core/workdir/UnpackedTarball/boost -I /home/maarten/src/libreoffice/core/sc/source/core/inc -I /home/maarten/src/libreoffice/core/sc/source/filter/inc -I /home/maarten/src/libreoffice/core/sc/source/ui/inc -I /home/maarten/src/libreoffice/core/sc/inc -I /home/maarten/src/libreoffice/core/workdir/SdiTarget/sc/sdi -I /home/maarten/src/libreoffice/core/include -I /usr/lib/jvm/java-11-openjdk-11.0.9.10-0.0.ea.fc33.x86_64/include -I /usr/lib/jvm/java-11-openjdk-11.0.9.10-0.0.ea.fc33.x86_64/include/linux -I /home/maarten/src/libreoffice/core/config_host -I /home/maarten/src/libreoffice/core/workdir/CustomTarget/officecfg/registry -I /home/maarten/src/libreoffice/core/workdir/UnoApiHeadersTarget/udkapi/normal -I /home/maarten/src/libreoffice/core/workdir/UnoApiHeadersTarget/offapi/normal -I /home/maarten/src/libreoffice/core/workdir/UnoApiHeadersTarget/oovbaapi/normal -internal-isystem /usr/bin/../lib/gcc/x86_64-redhat-linux/10/../../../../include/c++/10 -internal-isystem /usr/bin/../lib/gcc/x86_64-redhat-linux/10/../../../../include/c++/10/x86_64-redhat-linux -internal-isystem /usr/bin/../lib/gcc/x86_64-redhat-linux/10/../../../../include/c++/10/backward -internal-isystem /usr/local/include -internal-isystem /usr/lib64/clang/11.0.0/include -internal-externc-isystem /include -internal-externc-isystem /usr/include -O0 -Wno-missing-braces -std=c++17 -fdeprecated-macro -fdebug-compilation-dir /home/maarten/src/libreoffice/core -ferror-limit 19 -fvisibility hidden -fvisibility-inlines-hidden -stack-protector 2 -fgnuc-version=4.2.1 -fcxx-exceptions -fexceptions -debug-info-kind=constructor -analyzer-output=html -faddrsig -o /home/maarten/tmp/wis/scan-build-libreoffice/output/report/2020-10-07-141433-9725-1 -x c++ /home/maarten/src/libreoffice/core/sc/source/ui/app/seltrans.cxx

/home/maarten/src/libreoffice/core/sc/source/ui/app/seltrans.cxx

→
1/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
2/*
3 * This file is part of the LibreOffice project.
4 *
5 * This Source Code Form is subject to the terms of the Mozilla Public
6 * License, v. 2.0. If a copy of the MPL was not distributed with this
7 * file, You can obtain one at http://mozilla.org/MPL/2.0/.
8 *
9 * This file incorporates work covered by the following license notice:
10 *
11 * Licensed to the Apache Software Foundation (ASF) under one or more
12 * contributor license agreements. See the NOTICE file distributed
13 * with this work for additional information regarding copyright
14 * ownership. The ASF licenses this file to you under the Apache
15 * License, Version 2.0 (the "License"); you may not use this file
16 * except in compliance with the License. You may obtain a copy of
17 * the License at http://www.apache.org/licenses/LICENSE-2.0 .
18 */
19
20#include <com/sun/star/beans/XPropertySet.hpp>
21#include <com/sun/star/beans/XPropertySetInfo.hpp>
22#include <com/sun/star/form/FormButtonType.hpp>
23
24#include <tools/urlobj.hxx>
25#include <sfx2/docfile.hxx>
26#include <svx/svdograf.hxx>
27#include <svx/svdouno.hxx>
28
29#include <seltrans.hxx>
30#include <transobj.hxx>
31#include <drwtrans.hxx>
32#include <scmod.hxx>
33#include <dbfunc.hxx>
34#include <docsh.hxx>
35#include <drawview.hxx>
36#include <drwlayer.hxx>
37#include <markdata.hxx>
38
39using namespace com::sun::star;
40
41static bool lcl_IsURLButton( SdrObject* pObject )
42{
43 bool bRet = false;
44
45 SdrUnoObj* pUnoCtrl = dynamic_cast<SdrUnoObj*>( pObject );
46 if (pUnoCtrl && SdrInventor::FmForm == pUnoCtrl->GetObjInventor())
47 {
48 const uno::Reference<awt::XControlModel>& xControlModel = pUnoCtrl->GetUnoControlModel();
49 OSL_ENSURE( xControlModel.is(), "uno control without model" )do { if (true && (!(xControlModel.is()))) { sal_detail_logFormat
((SAL_DETAIL_LOG_LEVEL_WARN), ("legacy.osl"), ("/home/maarten/src/libreoffice/core/sc/source/ui/app/seltrans.cxx"
":" "49" ": "), "%s", "uno control without model"); } } while
(false);
50 if ( xControlModel.is() )
51 {
52 uno::Reference< beans::XPropertySet > xPropSet( xControlModel, uno::UNO_QUERY );
53 uno::Reference< beans::XPropertySetInfo > xInfo = xPropSet->getPropertySetInfo();
54
55 OUString sPropButtonType( "ButtonType" );
56 if(xInfo->hasPropertyByName( sPropButtonType ))
57 {
58 uno::Any aAny = xPropSet->getPropertyValue( sPropButtonType );
59 form::FormButtonType eTmp;
60 if ( (aAny >>= eTmp) && eTmp == form::FormButtonType_URL )
61 bRet = true;
62 }
63 }
64 }
65
66 return bRet;
67}
68
69ScSelectionTransferObj* ScSelectionTransferObj::CreateFromView( ScTabView* pView )
70{
71 ScSelectionTransferObj* pRet = nullptr;
72
73 try
74 {
75 if ( pView )
76 {
77 ScSelectionTransferMode eMode = SC_SELTRANS_INVALID;
78
79 SdrView* pSdrView = pView->GetScDrawView();
80 if ( pSdrView )
81 {
82 // handle selection on drawing layer
83 const SdrMarkList& rMarkList = pSdrView->GetMarkedObjectList();
84 const size_t nMarkCount = rMarkList.GetMarkCount();
85 if ( nMarkCount )
86 {
87 if ( nMarkCount == 1 )
88 {
89 SdrObject* pObj = rMarkList.GetMark(0)->GetMarkedSdrObj();
90 sal_uInt16 nSdrObjKind = pObj->GetObjIdentifier();
91
92 if ( nSdrObjKind == OBJ_GRAF )
93 {
94 if ( static_cast<SdrGrafObj*>(pObj)->GetGraphic().GetType() == GraphicType::Bitmap )
95 eMode = SC_SELTRANS_DRAW_BITMAP;
96 else
97 eMode = SC_SELTRANS_DRAW_GRAPHIC;
98 }
99 else if ( nSdrObjKind == OBJ_OLE2 )
100 eMode = SC_SELTRANS_DRAW_OLE;
101 else if ( lcl_IsURLButton( pObj ) )
102 eMode = SC_SELTRANS_DRAW_BOOKMARK;
103 }
104
105 if ( eMode == SC_SELTRANS_INVALID )
106 eMode = SC_SELTRANS_DRAW_OTHER; // something selected but no special selection
107 }
108 }
109 if ( eMode == SC_SELTRANS_INVALID ) // no drawing object selected
110 {
111 ScViewData& rViewData = pView->GetViewData();
112 const ScMarkData& rMark = rViewData.GetMarkData();
113 // allow MultiMarked because GetSimpleArea may be able to merge into a simple range
114 // (GetSimpleArea modifies a local copy of MarkData)
115 // Also allow simple filtered area.
116 if ( rMark.IsMarked() || rMark.IsMultiMarked() )
117 {
118 ScRange aRange;
119 ScMarkType eMarkType = rViewData.GetSimpleArea( aRange );
120 if (eMarkType == SC_MARK_SIMPLE || eMarkType == SC_MARK_SIMPLE_FILTERED)
121 {
122 // only for "real" selection, cursor alone isn't used
123 if ( aRange.aStart == aRange.aEnd )
124 eMode = SC_SELTRANS_CELL;
125 else
126 eMode = SC_SELTRANS_CELLS;
127 }
128 }
129 }
130
131 if ( eMode != SC_SELTRANS_INVALID )
132 pRet = new ScSelectionTransferObj( pView, eMode );
133 }
134 }
135 catch (...)
136 {
137 }
138
139 return pRet;
140}
141
142ScSelectionTransferObj::ScSelectionTransferObj( ScTabView* pSource, ScSelectionTransferMode eNewMode ) :
143 pView( pSource ),
144 eMode( eNewMode )
145{
146 //! store range for StillValid
147}
148
149ScSelectionTransferObj::~ScSelectionTransferObj()
150{
151 ScModule* pScMod = SC_MOD()( static_cast<ScModule*>(SfxApplication::GetModule(SfxToolsModule
::Calc)) );
152 if ( pScMod->GetSelectionTransfer() == this )
153 {
154 // this is reached when the object wasn't really copied to the selection
155 // (CopyToSelection has no effect under Windows)
156
157 ForgetView();
158 pScMod->SetSelectionTransfer( nullptr );
159 }
160
161 OSL_ENSURE( !pView, "ScSelectionTransferObj dtor: ForgetView not called" )do { if (true && (!(!pView))) { sal_detail_logFormat(
(SAL_DETAIL_LOG_LEVEL_WARN), ("legacy.osl"), ("/home/maarten/src/libreoffice/core/sc/source/ui/app/seltrans.cxx"
":" "161" ": "), "%s", "ScSelectionTransferObj dtor: ForgetView not called"
); } } while (false);
162}
163
164void ScSelectionTransferObj::ForgetView()
165{
166 pView = nullptr;
167 eMode = SC_SELTRANS_INVALID;
168
169 mxCellData.clear();
170 mxDrawData.clear();
171}
172
173void ScSelectionTransferObj::AddSupportedFormats()
174{
175 // AddSupportedFormats must work without actually creating the
176 // "real" transfer object
177
178 switch (eMode)
179 {
180 case SC_SELTRANS_CELL:
181 case SC_SELTRANS_CELLS:
182 // same formats as in ScTransferObj::AddSupportedFormats
183 AddFormat( SotClipboardFormatId::EMBED_SOURCE );
184 AddFormat( SotClipboardFormatId::OBJECTDESCRIPTOR );
185 AddFormat( SotClipboardFormatId::GDIMETAFILE );
186 AddFormat( SotClipboardFormatId::PNG );
187 AddFormat( SotClipboardFormatId::BITMAP );
188 AddFormat( SotClipboardFormatId::HTML );
189 AddFormat( SotClipboardFormatId::SYLK );
190 AddFormat( SotClipboardFormatId::LINK );
191 AddFormat( SotClipboardFormatId::DIF );
192 AddFormat( SotClipboardFormatId::STRING );
193 AddFormat( SotClipboardFormatId::STRING_TSVC );
194 AddFormat( SotClipboardFormatId::RTF );
195 AddFormat( SotClipboardFormatId::RICHTEXT );
196 if ( eMode == SC_SELTRANS_CELL )
197 {
198 AddFormat( SotClipboardFormatId::EDITENGINE_ODF_TEXT_FLAT );
199 }
200 break;
201
202 // different graphic formats as in ScDrawTransferObj::AddSupportedFormats:
203
204 case SC_SELTRANS_DRAW_BITMAP:
205 AddFormat( SotClipboardFormatId::OBJECTDESCRIPTOR );
206 AddFormat( SotClipboardFormatId::SVXB );
207 AddFormat( SotClipboardFormatId::PNG );
208 AddFormat( SotClipboardFormatId::BITMAP );
209 AddFormat( SotClipboardFormatId::GDIMETAFILE );
210 break;
211
212 case SC_SELTRANS_DRAW_GRAPHIC:
213 AddFormat( SotClipboardFormatId::OBJECTDESCRIPTOR );
214 AddFormat( SotClipboardFormatId::SVXB );
215 AddFormat( SotClipboardFormatId::GDIMETAFILE );
216 AddFormat( SotClipboardFormatId::PNG );
217 AddFormat( SotClipboardFormatId::BITMAP );
218 break;
219
220 case SC_SELTRANS_DRAW_BOOKMARK:
221 AddFormat( SotClipboardFormatId::OBJECTDESCRIPTOR );
222 AddFormat( SotClipboardFormatId::SOLK );
223 AddFormat( SotClipboardFormatId::STRING );
224 AddFormat( SotClipboardFormatId::UNIFORMRESOURCELOCATOR );
225 AddFormat( SotClipboardFormatId::NETSCAPE_BOOKMARK );
226 AddFormat( SotClipboardFormatId::DRAWING );
227 break;
228
229 case SC_SELTRANS_DRAW_OLE:
230 AddFormat( SotClipboardFormatId::EMBED_SOURCE );
231 AddFormat( SotClipboardFormatId::OBJECTDESCRIPTOR );
232 AddFormat( SotClipboardFormatId::GDIMETAFILE );
233 break;
234
235 case SC_SELTRANS_DRAW_OTHER:
236 // other drawing objects
237 AddFormat( SotClipboardFormatId::EMBED_SOURCE );
238 AddFormat( SotClipboardFormatId::OBJECTDESCRIPTOR );
239 AddFormat( SotClipboardFormatId::DRAWING );
240 AddFormat( SotClipboardFormatId::PNG );
241 AddFormat( SotClipboardFormatId::BITMAP );
242 AddFormat( SotClipboardFormatId::GDIMETAFILE );
243 break;
244
245 default:
246 {
247 // added to avoid warnings
248 }
249 }
250}
251
252void ScSelectionTransferObj::CreateCellData()
253{
254 OSL_ENSURE( !mxCellData.is(), "CreateCellData twice" )do { if (true && (!(!mxCellData.is()))) { sal_detail_logFormat
((SAL_DETAIL_LOG_LEVEL_WARN), ("legacy.osl"), ("/home/maarten/src/libreoffice/core/sc/source/ui/app/seltrans.cxx"
":" "254" ": "), "%s", "CreateCellData twice"); } } while (false
);
255 if ( pView )
256 {
257 ScViewData& rViewData = pView->GetViewData();
258 ScMarkData aNewMark( rViewData.GetMarkData() ); // use local copy for MarkToSimple
259 aNewMark.MarkToSimple();
260
261 // similar to ScViewFunctionSet::BeginDrag
262 if ( aNewMark.IsMarked() && !aNewMark.IsMultiMarked() )
263 {
264 ScDocShell* pDocSh = rViewData.GetDocShell();
265
266 ScRange aSelRange;
267 aNewMark.GetMarkArea( aSelRange );
268 ScDocShellRef aDragShellRef;
269 if ( pDocSh->GetDocument().HasOLEObjectsInArea( aSelRange, &aNewMark ) )
270 {
271 aDragShellRef = new ScDocShell; // DocShell needs a Ref immediately
272 aDragShellRef->DoInitNew();
273 }
274 ScDrawLayer::SetGlobalDrawPersist( aDragShellRef.get() );
275
276 ScDocumentUniquePtr pClipDoc(new ScDocument( SCDOCMODE_CLIP ));
277 // bApi = sal_True -> no error messages
278 // #i18364# bStopEdit = sal_False -> don't end edit mode
279 // (this may be called from pasting into the edit line)
280 bool bCopied = rViewData.GetView()->CopyToClip( pClipDoc.get(), false, true, true, false );
281
282 ScDrawLayer::SetGlobalDrawPersist(nullptr);
283
284 if ( bCopied )
285 {
286 TransferableObjectDescriptor aObjDesc;
287 pDocSh->FillTransferableObjectDescriptor( aObjDesc );
288 aObjDesc.maDisplayName = pDocSh->GetMedium()->GetURLObject().GetURLNoPass();
289 // maSize is set in ScTransferObj ctor
290
291 rtl::Reference<ScTransferObj> pTransferObj = new ScTransferObj( std::move(pClipDoc), aObjDesc );
292
293 // SetDragHandlePos is not used - there is no mouse position
294 //? pTransferObj->SetVisibleTab( nTab );
295
296 SfxObjectShellRef aPersistRef( aDragShellRef.get() );
297 pTransferObj->SetDrawPersist( aPersistRef ); // keep persist for ole objects alive
298
299 pTransferObj->SetDragSource( pDocSh, aNewMark );
300
301 mxCellData = pTransferObj;
302 }
303 }
304 }
305 OSL_ENSURE( mxCellData.is(), "can't create CellData" )do { if (true && (!(mxCellData.is()))) { sal_detail_logFormat
((SAL_DETAIL_LOG_LEVEL_WARN), ("legacy.osl"), ("/home/maarten/src/libreoffice/core/sc/source/ui/app/seltrans.cxx"
":" "305" ": "), "%s", "can't create CellData"); } } while (
false);
306}
307
308void ScSelectionTransferObj::CreateDrawData()
309{
310 OSL_ENSURE( !mxDrawData.is(), "CreateDrawData twice" )do { if (true && (!(!mxDrawData.is()))) { sal_detail_logFormat
((SAL_DETAIL_LOG_LEVEL_WARN), ("legacy.osl"), ("/home/maarten/src/libreoffice/core/sc/source/ui/app/seltrans.cxx"
":" "310" ": "), "%s", "CreateDrawData twice"); } } while (false
);
4
←
Taking false branch
→
5
←
Loop condition is false. Exiting loop
→
311 if ( pView )
6
←
Assuming field 'pView' is non-null
→
7
←
Taking true branch
→
312 {
313 // similar to ScDrawView::BeginDrag
314
315 ScDrawView* pDrawView = pView->GetScDrawView();
316 if ( pDrawView )
8
←
Assuming 'pDrawView' is non-null
→
9
←
Taking true branch
→
317 {
318 bool bAnyOle, bOneOle;
319 const SdrMarkList& rMarkList = pDrawView->GetMarkedObjectList();
320 ScDrawView::CheckOle( rMarkList, bAnyOle, bOneOle );
321
322 ScDocShellRef aDragShellRef;
323 if (bAnyOle)
10
←
Assuming 'bAnyOle' is true
→
11
←
Taking true branch
→
324 {
325 aDragShellRef = new ScDocShell; // Without Ref the DocShell does not live
12
←
Memory is allocated
→
326 aDragShellRef->DoInitNew();
327 }
328
329 ScDrawLayer::SetGlobalDrawPersist( aDragShellRef.get() );
330 std::unique_ptr<SdrModel> pModel(pDrawView->CreateMarkedObjModel());
331 ScDrawLayer::SetGlobalDrawPersist(nullptr);
332
333 ScViewData& rViewData = pView->GetViewData();
334 ScDocShell* pDocSh = rViewData.GetDocShell();
335
336 TransferableObjectDescriptor aObjDesc;
337 pDocSh->FillTransferableObjectDescriptor( aObjDesc );
338 aObjDesc.maDisplayName = pDocSh->GetMedium()->GetURLObject().GetURLNoPass();
339 // maSize is set in ScDrawTransferObj ctor
340
341 rtl::Reference<ScDrawTransferObj> pTransferObj = new ScDrawTransferObj( std::move(pModel), pDocSh, aObjDesc );
342
343 SfxObjectShellRef aPersistRef( aDragShellRef.get() );
344 pTransferObj->SetDrawPersist( aPersistRef ); // keep persist for ole objects alive
345 pTransferObj->SetDragSource( pDrawView ); // copies selection
346
347 mxDrawData = pTransferObj;
348 }
13
←
Calling '~SvRef'
→
23
←
Returning from '~SvRef'
→
24
←
Calling '~SvRef'
→
349 }
350 OSL_ENSURE( mxDrawData.is(), "can't create DrawData" )do { if (true && (!(mxDrawData.is()))) { sal_detail_logFormat
((SAL_DETAIL_LOG_LEVEL_WARN), ("legacy.osl"), ("/home/maarten/src/libreoffice/core/sc/source/ui/app/seltrans.cxx"
":" "350" ": "), "%s", "can't create DrawData"); } } while (
false);
351}
352
353ScTransferObj* ScSelectionTransferObj::GetCellData()
354{
355 if ( !mxCellData.is() && ( eMode == SC_SELTRANS_CELL || eMode == SC_SELTRANS_CELLS ) )
356 CreateCellData();
357 return mxCellData.get();
358}
359
360ScDrawTransferObj* ScSelectionTransferObj::GetDrawData()
361{
362 if ( !mxDrawData.is() && ( eMode
2.1
Field 'eMode' is equal to SC_SELTRANS_DRAW_BITMAP
2.1
Field 'eMode' is equal to SC_SELTRANS_DRAW_BITMAP
 == SC_SELTRANS_DRAW_BITMAP || eMode == SC_SELTRANS_DRAW_GRAPHIC ||
363 eMode == SC_SELTRANS_DRAW_BOOKMARK || eMode == SC_SELTRANS_DRAW_OLE ||
364 eMode == SC_SELTRANS_DRAW_OTHER ) )
365 CreateDrawData();
3
←
Calling 'ScSelectionTransferObj::CreateDrawData'
→
366 return mxDrawData.get();
367}
368
369bool ScSelectionTransferObj::GetData(
370 const css::datatransfer::DataFlavor& rFlavor, const OUString& rDestDoc )
371{
372 bool bOK = false;
373
374 uno::Reference<datatransfer::XTransferable> xSource;
375 switch (eMode)
1
Control jumps to 'case SC_SELTRANS_DRAW_BITMAP:' at line 381
→
376 {
377 case SC_SELTRANS_CELL:
378 case SC_SELTRANS_CELLS:
379 xSource = GetCellData();
380 break;
381 case SC_SELTRANS_DRAW_BITMAP:
382 case SC_SELTRANS_DRAW_GRAPHIC:
383 case SC_SELTRANS_DRAW_BOOKMARK:
384 case SC_SELTRANS_DRAW_OLE:
385 case SC_SELTRANS_DRAW_OTHER:
386 xSource = GetDrawData();
2
←
Calling 'ScSelectionTransferObj::GetDrawData'
→
387 break;
388 default:
389 {
390 // added to avoid warnings
391 }
392 }
393
394 if ( xSource.is() )
395 {
396 TransferableDataHelper aHelper( xSource );
397 uno::Any aAny = aHelper.GetAny(rFlavor, rDestDoc);
398 bOK = SetAny( aAny );
399 }
400
401 return bOK;
402}
403
404void ScSelectionTransferObj::ObjectReleased()
405{
406 // called when another selection is set from outside
407
408 ForgetView();
409
410 ScModule* pScMod = SC_MOD()( static_cast<ScModule*>(SfxApplication::GetModule(SfxToolsModule
::Calc)) );
411 if ( pScMod->GetSelectionTransfer() == this )
412 pScMod->SetSelectionTransfer( nullptr );
413
414 TransferableHelper::ObjectReleased();
415}
416
417sal_Bool SAL_CALL ScSelectionTransferObj::isComplex()
418{
419 switch (eMode)
420 {
421 case SC_SELTRANS_CELL:
422 case SC_SELTRANS_CELLS:
423 return false;
424 default:
425 return true;
426 }
427}
428
429/* vim:set shiftwidth=4 softtabstop=4 expandtab: */
←

/home/maarten/src/libreoffice/core/include/tools/ref.hxx

1/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
2/*
3 * This file is part of the LibreOffice project.
4 *
5 * This Source Code Form is subject to the terms of the Mozilla Public
6 * License, v. 2.0. If a copy of the MPL was not distributed with this
7 * file, You can obtain one at http://mozilla.org/MPL/2.0/.
8 *
9 * This file incorporates work covered by the following license notice:
10 *
11 * Licensed to the Apache Software Foundation (ASF) under one or more
12 * contributor license agreements. See the NOTICE file distributed
13 * with this work for additional information regarding copyright
14 * ownership. The ASF licenses this file to you under the Apache
15 * License, Version 2.0 (the "License"); you may not use this file
16 * except in compliance with the License. You may obtain a copy of
17 * the License at http://www.apache.org/licenses/LICENSE-2.0 .
18 */
19#ifndef INCLUDED_TOOLS_REF_HXX
20#define INCLUDED_TOOLS_REF_HXX
21
22#include <sal/config.h>
23#include <cassert>
24#include <tools/toolsdllapi.h>
25#include <utility>
26
27/**
28 This implements similar functionality to boost::intrusive_ptr
29*/
30
31namespace tools {
32
33/** T must be a class that extends SvRefBase */
34template<typename T> class SAL_DLLPUBLIC_RTTI__attribute__ ((type_visibility("default"))) SvRef final {
35public:
36 SvRef(): pObj(nullptr) {}
37
38 SvRef(SvRef&& rObj) noexcept
39 {
40 pObj = rObj.pObj;
41 rObj.pObj = nullptr;
42 }
43
44 SvRef(SvRef const & rObj): pObj(rObj.pObj)
45 {
46 if (pObj != nullptr) pObj->AddNextRef();
47 }
48
49 SvRef(T * pObjP): pObj(pObjP)
50 {
51 if (pObj != nullptr) pObj->AddFirstRef();
52 }
53
54 ~SvRef()
55 {
56 if (pObj != nullptr) pObj->ReleaseRef();
14
←
Taking true branch
→
15
←
Calling 'SvRefBase::ReleaseRef'
→
22
←
Returning; memory was released
→
25
←
Taking true branch
→
26
←
Use of memory after it is freed
57 }
58
59 void clear()
60 {
61 if (pObj != nullptr) {
62 T * pRefObj = pObj;
63 pObj = nullptr;
64 pRefObj->ReleaseRef();
65 }
66 }
67
68 SvRef & operator =(SvRef const & rObj)
69 {
70 if (rObj.pObj != nullptr) {
71 rObj.pObj->AddNextRef();
72 }
73 T * pRefObj = pObj;
74 pObj = rObj.pObj;
75 if (pRefObj != nullptr) {
76 pRefObj->ReleaseRef();
77 }
78 return *this;
79 }
80
81 SvRef & operator =(SvRef && rObj)
82 {
83 if (pObj != nullptr) {
84 pObj->ReleaseRef();
85 }
86 pObj = rObj.pObj;
87 rObj.pObj = nullptr;
88 return *this;
89 }
90
91 bool is() const { return pObj != nullptr; }
92
93 explicit operator bool() const { return is(); }
94
95 T * get() const { return pObj; }
96
97 T * operator ->() const { assert(pObj != nullptr)(static_cast <bool> (pObj != nullptr) ? void (0) : __assert_fail
("pObj != nullptr", "/home/maarten/src/libreoffice/core/include/tools/ref.hxx"
, 97, __extension__ __PRETTY_FUNCTION__)); return pObj; }
98
99 T & operator *() const { assert(pObj != nullptr)(static_cast <bool> (pObj != nullptr) ? void (0) : __assert_fail
("pObj != nullptr", "/home/maarten/src/libreoffice/core/include/tools/ref.hxx"
, 99, __extension__ __PRETTY_FUNCTION__)); return *pObj; }
100
101 bool operator ==(const SvRef<T> &rhs) const { return pObj == rhs.pObj; }
102 bool operator !=(const SvRef<T> &rhs) const { return !(*this == rhs); }
103
104private:
105 T * pObj;
106};
107
108/**
109 * This implements similar functionality to std::make_shared.
110 */
111template<typename T, typename... Args>
112SvRef<T> make_ref(Args&& ... args)
113{
114 return SvRef<T>(new T(std::forward<Args>(args)...));
115}
116
117}
118
119/** Classes that want to be referenced-counted via SvRef<T>, should extend this base class */
120class TOOLS_DLLPUBLIC__attribute__ ((visibility("default"))) SvRefBase
121{
122 // work around a clang 3.5 optimization bug: if the bNoDelete is *first*
123 // it mis-compiles "if (--nRefCount == 0)" and never deletes any object
124 unsigned int nRefCount : 31;
125 // the only reason this is not bool is because MSVC cannot handle mixed type bitfields
126 unsigned int bNoDelete : 1;
127
128protected:
129 virtual ~SvRefBase() COVERITY_NOEXCEPT_FALSE;
130
131public:
132 SvRefBase() : nRefCount(0), bNoDelete(1) {}
133 SvRefBase(const SvRefBase &) : nRefCount(0), bNoDelete(1) {}
134
135 SvRefBase & operator=(const SvRefBase &) { return *this; }
136
137 void RestoreNoDelete()
138 { bNoDelete = 1; }
139
140 void AddNextRef()
141 {
142 assert( nRefCount < (1 << 30) && "Do not add refs to dead objects" )(static_cast <bool> (nRefCount < (1 << 30) &&
"Do not add refs to dead objects") ? void (0) : __assert_fail
("nRefCount < (1 << 30) && \"Do not add refs to dead objects\""
, "/home/maarten/src/libreoffice/core/include/tools/ref.hxx",
142, __extension__ __PRETTY_FUNCTION__));
143 ++nRefCount;
144 }
145
146 void AddFirstRef()
147 {
148 assert( nRefCount < (1 << 30) && "Do not add refs to dead objects" )(static_cast <bool> (nRefCount < (1 << 30) &&
"Do not add refs to dead objects") ? void (0) : __assert_fail
("nRefCount < (1 << 30) && \"Do not add refs to dead objects\""
, "/home/maarten/src/libreoffice/core/include/tools/ref.hxx",
148, __extension__ __PRETTY_FUNCTION__));
149 if( bNoDelete )
150 bNoDelete = 0;
151 ++nRefCount;
152 }
153
154 void ReleaseRef()
155 {
156 assert( nRefCount >= 1)(static_cast <bool> (nRefCount >= 1) ? void (0) : __assert_fail
("nRefCount >= 1", "/home/maarten/src/libreoffice/core/include/tools/ref.hxx"
, 156, __extension__ __PRETTY_FUNCTION__));
16
←
Assuming field 'nRefCount' is >= 1
→
17
←
'?' condition is true
→
157 if( --nRefCount == 0 && !bNoDelete)
18
←
Assuming the condition is true
→
19
←
Assuming field 'bNoDelete' is 0
→
20
←
Taking true branch
→
158 {
159 // I'm not sure about the original purpose of this line, but right now
160 // it serves the purpose that anything that attempts to do an AddRef()
161 // after an object is deleted will trip an assert.
162 nRefCount = 1 << 30;
163 delete this;
21
←
Memory is released
→
164 }
165 }
166
167 unsigned int GetRefCount() const
168 { return nRefCount; }
169};
170
171template<typename T>
172class SvCompatWeakBase;
173
174/** SvCompatWeakHdl acts as an intermediary between SvCompatWeakRef<T> and T.
175*/
176template<typename T>
177class SvCompatWeakHdl final : public SvRefBase
178{
179 friend class SvCompatWeakBase<T>;
180 T* _pObj;
181
182 SvCompatWeakHdl( T* pObj ) : _pObj( pObj ) {}
183
184public:
185 void ResetWeakBase( ) { _pObj = nullptr; }
186 T* GetObj() { return _pObj; }
187};
188
189/** We only have one place that extends this, in include/sfx2/frame.hxx, class SfxFrame.
190 Its function is to notify the SvCompatWeakHdl when an SfxFrame object is deleted.
191*/
192template<typename T>
193class SvCompatWeakBase
194{
195 tools::SvRef< SvCompatWeakHdl<T> > _xHdl;
196
197public:
198 /** Does not use initializer due to compiler warnings,
199 because the lifetime of the _xHdl object can exceed the lifetime of this class.
200 */
201 SvCompatWeakBase( T* pObj ) { _xHdl = new SvCompatWeakHdl<T>( pObj ); }
202
203 ~SvCompatWeakBase() { _xHdl->ResetWeakBase(); }
204
205 SvCompatWeakHdl<T>* GetHdl() { return _xHdl.get(); }
206};
207
208/** We only have one weak reference in LO, in include/sfx2/frame.hxx, class SfxFrameWeak.
209*/
210template<typename T>
211class SAL_WARN_UNUSED__attribute__((warn_unused)) SvCompatWeakRef
212{
213 tools::SvRef< SvCompatWeakHdl<T> > _xHdl;
214public:
215 SvCompatWeakRef( ) {}
216 SvCompatWeakRef( T* pObj )
217 { if( pObj ) _xHdl = pObj->GetHdl(); }
218#if defined(__COVERITY__)
219 ~SvCompatWeakRef() COVERITY_NOEXCEPT_FALSE {}
220#endif
221 SvCompatWeakRef& operator = ( T * pObj )
222 { _xHdl = pObj ? pObj->GetHdl() : nullptr; return *this; }
223 bool is() const
224 { return _xHdl.is() && _xHdl->GetObj(); }
225 explicit operator bool() const { return is(); }
226 T* operator -> () const
227 { return _xHdl.is() ? _xHdl->GetObj() : nullptr; }
228 operator T* () const
229 { return _xHdl.is() ? _xHdl->GetObj() : nullptr; }
230};
231
232#endif
233
234/* vim:set shiftwidth=4 softtabstop=4 expandtab: */