tdf#160706 speed up loading conditional formatting rule in XLS (3)

the comment when calling MakeCellStyleSheet does not match the
implementation, so make the implementation match the comment.
i.e. if there is an existing stylesheet with that name, just return it.

Reduces load time for me from 47s to 33s

Change-Id: If1bd08baf8515933b87c075d9eef04bc0a125357
Reviewed-on: https://gerrit.libreoffice.org/c/core/+/166241
Tested-by: Jenkins
Reviewed-by: Noel Grandin <noel.grandin@collabora.co.uk>

4 files changed, 13 insertions, 9 deletions

diff --git a/sc/source/filter/excel/xicontent.cxx b/sc/source/filter/excel/xicontent.cxx
index a2862f7b6988..8701b3c69204 100644
--- a/sc/source/filter/excel/xicontent.cxx
+++ b/sc/source/filter/excel/xicontent.cxx
@@ -576,7 +576,7 @@ void XclImpCondFormat::ReadCF( XclImpStream& rStrm )
     // *** create style sheet ***
 
     OUString aStyleName( XclTools::GetCondFormatStyleName( GetCurrScTab(), mnFormatIndex, mnCondIndex ) );
-    SfxItemSet& rStyleItemSet = ScfTools::MakeCellStyleSheet( GetStyleSheetPool(), aStyleName, true ).GetItemSet();
+    SfxItemSet& rStyleItemSet = ScfTools::MakeCellStyleSheet( GetStyleSheetPool(), aStyleName ).GetItemSet();
 
     const XclImpPalette& rPalette = GetPalette();
 
diff --git a/sc/source/filter/ftools/ftools.cxx b/sc/source/filter/ftools/ftools.cxx
index bf2b784a994b..1ce82e5dd1d8 100644
--- a/sc/source/filter/ftools/ftools.cxx
+++ b/sc/source/filter/ftools/ftools.cxx
@@ -254,9 +254,14 @@ ScStyleSheet& lclMakeStyleSheet( ScStyleSheetPool& rPool, const OUString& rStyle
 
 } // namespace
 
-ScStyleSheet& ScfTools::MakeCellStyleSheet( ScStyleSheetPool& rPool, const OUString& rStyleName, bool bForceName )
+ScStyleSheet& ScfTools::MakeCellStyleSheet( ScStyleSheetPool& rPool, const OUString& rStyleName )
 {
-    return lclMakeStyleSheet( rPool, rStyleName, SfxStyleFamily::Para, bForceName );
+    SfxStyleSheetBase* pOldStyleSheet = rPool.Find( rStyleName, SfxStyleFamily::Para );
+    if( pOldStyleSheet )
+        return static_cast< ScStyleSheet& >(*pOldStyleSheet);
+
+    // create new style sheet
+    return static_cast< ScStyleSheet& >( rPool.Make( rStyleName, SfxStyleFamily::Para, SfxStyleSearchBits::UserDefined ) );
 }
 
 ScStyleSheet& ScfTools::MakePageStyleSheet( ScStyleSheetPool& rPool, const OUString& rStyleName, bool bForceName )
diff --git a/sc/source/filter/inc/ftools.hxx b/sc/source/filter/inc/ftools.hxx
index 7e8a07bce8c8..0fdb90cc26ae 100644
--- a/sc/source/filter/inc/ftools.hxx
+++ b/sc/source/filter/inc/ftools.hxx
@@ -193,12 +193,11 @@ public:
 // *** style sheet handling *** -----------------------------------------------
 
     /** Creates and returns a cell style sheet and inserts it into the pool.
-        @descr  If the style sheet is already in the pool, another unused style name is used.
-        @param bForceName  Controls behaviour, if the style already exists:
-        true = Old existing style will be renamed; false = New style gets another name. */
+        @descr  If the style sheet is already in the pool, return the existing style.
+    */
     static ScStyleSheet& MakeCellStyleSheet(
                             ScStyleSheetPool& rPool,
-                            const OUString& rStyleName, bool bForceName );
+                            const OUString& rStyleName );
     /** Creates and returns a page style sheet and inserts it into the pool.
         @descr  If the style sheet is already in the pool, another unused style name is used.
         @param bForceName  Controls behaviour, if the style already exists:
diff --git a/sc/source/filter/oox/stylesbuffer.cxx b/sc/source/filter/oox/stylesbuffer.cxx
index 234d0365bdec..76245a6980a3 100644
--- a/sc/source/filter/oox/stylesbuffer.cxx
+++ b/sc/source/filter/oox/stylesbuffer.cxx
@@ -3005,7 +3005,7 @@ OUString StylesBuffer::createDxfStyle( sal_Int32 nDxfId ) const
         // Create a cell style. This may overwrite an existing style if
         // one with the same name exists.
         ScStyleSheet& rStyleSheet = ScfTools::MakeCellStyleSheet(
-                *getScDocument().GetStyleSheetPool(), rStyleName, true);
+                *getScDocument().GetStyleSheetPool(), rStyleName);
 
         rStyleSheet.ResetParent();
         SfxItemSet& rStyleItemSet =
@@ -3033,7 +3033,7 @@ OUString StylesBuffer::createExtDxfStyle( sal_Int32 nDxfId ) const
         // Create a cell style. This may overwrite an existing style if
         // one with the same name exists.
         ScStyleSheet& rStyleSheet = ScfTools::MakeCellStyleSheet(
-                *getScDocument().GetStyleSheetPool(), rStyleName, true);
+                *getScDocument().GetStyleSheetPool(), rStyleName);
 
         rStyleSheet.ResetParent();
         SfxItemSet& rStyleItemSet =