pass OutlinerParaObject around by std::unique_ptr

SdrText::SetOutlinerParaObject was modified to not check for
self-assign, and instead assert because
the existing check was no longer possible.

Fix bug in SdrUndoObjSetText::Undo(), where it was calling
SdrText::SetOutlinerParaObject unnecessarily,
because NbcSetOutlinerParaObjectForText already does that.

Optimise Outliner::GetEmptyParaObject by creating a new constructor for
OutlinerParaObject,
so we don't need to copy the new object we get back from
GetEmptyTextObject, unnecessarily.

Change-Id: I57c475583d6c31658c154e24992b3d587bad9841
Reviewed-on: https://gerrit.libreoffice.org/56730
Tested-by: Jenkins
Reviewed-by: Noel Grandin <noel.grandin@collabora.co.uk>

3 files changed, 19 insertions, 15 deletions

diff --git a/editeng/source/outliner/outliner.cxx b/editeng/source/outliner/outliner.cxx
index 344ece6b82ff..d595486c2fdb 100644
--- a/editeng/source/outliner/outliner.cxx
+++ b/editeng/source/outliner/outliner.cxx
@@ -369,7 +369,7 @@ void Outliner::SetHoriAlignIgnoreTrailingWhitespace(bool bEnabled)
     pEditEngine->SetHoriAlignIgnoreTrailingWhitespace( bEnabled );
 }
 
-OutlinerParaObject* Outliner::CreateParaObject( sal_Int32 nStartPara, sal_Int32 nCount ) const
+std::unique_ptr<OutlinerParaObject> Outliner::CreateParaObject( sal_Int32 nStartPara, sal_Int32 nCount ) const
 {
     if ( static_cast<sal_uLong>(nStartPara) + nCount >
             static_cast<sal_uLong>(pParaList->GetParagraphCount()) )
@@ -393,7 +393,7 @@ OutlinerParaObject* Outliner::CreateParaObject( sal_Int32 nStartPara, sal_Int32
         aParagraphDataVector[nPara-nStartPara] = *GetParagraph(nPara);
     }
 
-    OutlinerParaObject* pPObj = new OutlinerParaObject(*pText, aParagraphDataVector, bIsEditDoc);
+    std::unique_ptr<OutlinerParaObject> pPObj(new OutlinerParaObject(*pText, aParagraphDataVector, bIsEditDoc));
     pPObj->SetOutlinerMode(GetMode());
 
     return pPObj;
@@ -401,9 +401,8 @@ OutlinerParaObject* Outliner::CreateParaObject( sal_Int32 nStartPara, sal_Int32
 
 void Outliner::SetToEmptyText()
 {
-    OutlinerParaObject *pEmptyTxt =  GetEmptyParaObject();
+    std::unique_ptr<OutlinerParaObject> pEmptyTxt = GetEmptyParaObject();
     SetText(*pEmptyTxt);
-    delete pEmptyTxt;
 }
 
 void Outliner::SetText( const OUString& rText, Paragraph* pPara )
@@ -2115,10 +2114,10 @@ NonOverflowingText *Outliner::GetNonOverflowingText() const
     }
 }
 
-OutlinerParaObject *Outliner::GetEmptyParaObject() const
+std::unique_ptr<OutlinerParaObject> Outliner::GetEmptyParaObject() const
 {
     std::unique_ptr<EditTextObject> pEmptyText = pEditEngine->GetEmptyTextObject();
-    OutlinerParaObject* pPObj = new OutlinerParaObject( *pEmptyText );
+    std::unique_ptr<OutlinerParaObject> pPObj( new OutlinerParaObject( std::move(pEmptyText) ));
     pPObj->SetOutlinerMode(GetMode());
     return pPObj;
 }
diff --git a/editeng/source/outliner/outlobj.cxx b/editeng/source/outliner/outlobj.cxx
index 04688bb06728..8002419cc37d 100644
--- a/editeng/source/outliner/outlobj.cxx
+++ b/editeng/source/outliner/outlobj.cxx
@@ -77,6 +77,11 @@ OutlinerParaObject::OutlinerParaObject( const EditTextObject& rTextObj ) :
 {
 }
 
+OutlinerParaObject::OutlinerParaObject( std::unique_ptr<EditTextObject> pTextObj ) :
+    mpImpl(OutlinerParaObjData(std::move(pTextObj), ParagraphDataVector(), true))
+{
+}
+
 OutlinerParaObject::OutlinerParaObject( const OutlinerParaObject& r ) :
     mpImpl(r.mpImpl)
 {
diff --git a/editeng/source/outliner/overflowingtxt.cxx b/editeng/source/outliner/overflowingtxt.cxx
index 5577104b7f7e..e5bc3097e82b 100644
--- a/editeng/source/outliner/overflowingtxt.cxx
+++ b/editeng/source/outliner/overflowingtxt.cxx
@@ -31,7 +31,7 @@
 #include <com/sun/star/datatransfer/clipboard/XClipboard.hpp>
 
 
-OutlinerParaObject *TextChainingUtils::JuxtaposeParaObject(
+std::unique_ptr<OutlinerParaObject> TextChainingUtils::JuxtaposeParaObject(
         css::uno::Reference< css::datatransfer::XTransferable > const & xOverflowingContent,
         Outliner *pOutl,
         OutlinerParaObject const *pNextPObj)
@@ -66,7 +66,7 @@ OutlinerParaObject *TextChainingUtils::JuxtaposeParaObject(
     return pOutl->CreateParaObject();
 }
 
-OutlinerParaObject *TextChainingUtils::DeeplyMergeParaObject(
+std::unique_ptr<OutlinerParaObject> TextChainingUtils::DeeplyMergeParaObject(
         css::uno::Reference< css::datatransfer::XTransferable > const & xOverflowingContent,
         Outliner *pOutl,
         OutlinerParaObject const *pNextPObj)
@@ -125,7 +125,7 @@ bool NonOverflowingText::IsLastParaInterrupted() const
 }
 
 
-OutlinerParaObject *NonOverflowingText::RemoveOverflowingText(Outliner *pOutliner) const
+std::unique_ptr<OutlinerParaObject> NonOverflowingText::RemoveOverflowingText(Outliner *pOutliner) const
 {
     pOutliner->QuickDelete(maContentSel);
     SAL_INFO("editeng.chaining", "Deleting selection from (Para: " << maContentSel.nStartPara
@@ -144,12 +144,12 @@ ESelection NonOverflowingText::GetOverflowPointSel() const
 
 // The equivalent of ToParaObject for OverflowingText. Here we are prepending the overflowing text to the old dest box's text
 // XXX: In a sense a better name for OverflowingText and NonOverflowingText are respectively DestLinkText and SourceLinkText
-OutlinerParaObject *OverflowingText::JuxtaposeParaObject(Outliner *pOutl, OutlinerParaObject const *pNextPObj)
+std::unique_ptr<OutlinerParaObject> OverflowingText::JuxtaposeParaObject(Outliner *pOutl, OutlinerParaObject const *pNextPObj)
 {
     return TextChainingUtils::JuxtaposeParaObject(mxOverflowingContent, pOutl, pNextPObj);
 }
 
-OutlinerParaObject *OverflowingText::DeeplyMergeParaObject(Outliner *pOutl, OutlinerParaObject const *pNextPObj)
+std::unique_ptr<OutlinerParaObject> OverflowingText::DeeplyMergeParaObject(Outliner *pOutl, OutlinerParaObject const *pNextPObj)
 {
     return TextChainingUtils::DeeplyMergeParaObject(mxOverflowingContent, pOutl, pNextPObj);
 }
@@ -174,7 +174,7 @@ ESelection OFlowChainedText::GetOverflowPointSel() const
     return mpNonOverflowingTxt->GetOverflowPointSel();
 }
 
-OutlinerParaObject *OFlowChainedText::InsertOverflowingText(Outliner *pOutliner, OutlinerParaObject const *pTextToBeMerged)
+std::unique_ptr<OutlinerParaObject> OFlowChainedText::InsertOverflowingText(Outliner *pOutliner, OutlinerParaObject const *pTextToBeMerged)
 {
     // Just return the roughly merged paras for now
     if (mpOverflowingTxt == nullptr)
@@ -190,7 +190,7 @@ OutlinerParaObject *OFlowChainedText::InsertOverflowingText(Outliner *pOutliner,
 }
 
 
-OutlinerParaObject *OFlowChainedText::RemoveOverflowingText(Outliner *pOutliner)
+std::unique_ptr<OutlinerParaObject> OFlowChainedText::RemoveOverflowingText(Outliner *pOutliner)
 {
     if (mpNonOverflowingTxt == nullptr)
         return nullptr;
@@ -212,9 +212,9 @@ UFlowChainedText::UFlowChainedText(Outliner const *pOutl, bool bIsDeepMerge)
     mbIsDeepMerge = bIsDeepMerge;
 }
 
-OutlinerParaObject *UFlowChainedText::CreateMergedUnderflowParaObject(Outliner *pOutl, OutlinerParaObject const *pNextLinkWholeText)
+std::unique_ptr<OutlinerParaObject> UFlowChainedText::CreateMergedUnderflowParaObject(Outliner *pOutl, OutlinerParaObject const *pNextLinkWholeText)
 {
-    OutlinerParaObject *pNewText = nullptr;
+    std::unique_ptr<OutlinerParaObject> pNewText;
 
     if (mbIsDeepMerge) {
         SAL_INFO("editeng.chaining", "[TEXTCHAINFLOW - UF] Deep merging paras" );