tdf#50613 buffer OLE primitives for charts

If OLE is a chart, buffer the primitives used for presentation as
info at the SwOLEObj, after getting them the first time using the
ChartHelper.

Change-Id: I6d7486185f6eac450de9328d37ea800f424f351b

sw/inc/ndole.hxx

@@ -41,6 +41,10 @@ class SW_DLLPUBLIC SwOLEObj
     svt::EmbeddedObjectRef xOLERef;
     OUString aName;
 
+    // eventually buffered data if it is a chart OLE
+    drawinglayer::primitive2d::Primitive2DContainer     m_aPrimitive2DSequence;
+    basegfx::B2DRange                                   m_aRange;
+
     SwOLEObj( const SwOLEObj& rObj ) = delete;
 
     void SetNode( SwOLENode* pNode );
@@ -62,6 +66,11 @@ public:
     const OUString& GetCurrentPersistName() const { return aName; }
     OUString GetStyleString();
     bool IsOleRef() const;  ///< To avoid unnecessary loading of object.
+
+    // try to get OLE visualization in form of a Primitive2DSequence
+    // and the corresponding B2DRange. This data may be locally buffered
+    drawinglayer::primitive2d::Primitive2DContainer tryToGetChartContentAsPrimitive2DSequence(basegfx::B2DRange& rRange);
+    void resetBufferedData();
 };
 
 // SwOLENode

sw/source/core/doc/notxtfrm.cxx

@@ -69,7 +69,6 @@
 #include <com/sun/star/embed/EmbedMisc.hpp>
 #include <com/sun/star/embed/EmbedStates.hpp>
 #include <svtools/embedhlp.hxx>
-#include <svx/charthelper.hxx>
 #include <dview.hxx>
 #include <basegfx/matrix/b2dhommatrix.hxx>
 #include <drawinglayer/processor2d/baseprocessor2d.hxx>
@@ -998,16 +997,10 @@ void SwNoTextFrame::PaintPicture( vcl::RenderContext* pOut, const SwRect &rGrfAr
         bool bDone(false);
 
         if(bIsChart)
-        {
-            const uno::Reference< frame::XModel > aXModel(pOLENd->GetOLEObj().GetOleRef()->getComponent(), uno::UNO_QUERY);
-
-            if(aXModel.is())
         {
             basegfx::B2DRange aSourceRange;
-
             const drawinglayer::primitive2d::Primitive2DContainer aSequence(
-                    ChartHelper::tryToGetChartContentAsPrimitive2DSequence(
+                pOLENd->GetOLEObj().tryToGetChartContentAsPrimitive2DSequence(
-                        aXModel,
                     aSourceRange));
 
             if(!aSequence.empty() && !aSourceRange.isEmpty())
@@ -1023,7 +1016,6 @@ void SwNoTextFrame::PaintPicture( vcl::RenderContext* pOut, const SwRect &rGrfAr
                     aTargetRange);
             }
         }
-        }
 
         if(!bDone && pOLENd)
         {

sw/source/core/ole/ndole.cxx

@@ -56,6 +56,7 @@
 #include <unotools/ucbstreamhelper.hxx>
 #include <vcl/graphicfilter.hxx>
 #include <comcore.hrc>
+#include <svx/charthelper.hxx>
 
 #include <deque>
 
@@ -124,6 +125,10 @@ void SAL_CALL SwOLEListener_Impl::stateChanged( const lang::EventObject&, ::sal_
         if (g_pOLELRU_Cache)
             g_pOLELRU_Cache->RemoveObj( *mpObj );
     }
+    else if(mpObj && nNewState == embed::EmbedStates::RUNNING)
+    {
+        mpObj->resetBufferedData();
+    }
 }
 
 void SwOLEListener_Impl::Release()
@@ -640,7 +645,9 @@ bool SwOLENode::IsChart() const
 SwOLEObj::SwOLEObj( const svt::EmbeddedObjectRef& xObj ) :
     pOLENd( nullptr ),
     pListener( nullptr ),
-    xOLERef( xObj )
+    xOLERef( xObj ),
+    m_aPrimitive2DSequence(),
+    m_aRange()
 {
     xOLERef.Lock();
     if ( xObj.is() )
@@ -654,7 +661,9 @@ SwOLEObj::SwOLEObj( const svt::EmbeddedObjectRef& xObj ) :
 SwOLEObj::SwOLEObj( const OUString &rString, sal_Int64 nAspect ) :
     pOLENd( nullptr ),
     pListener( nullptr ),
-    aName( rString )
+    aName( rString ),
+    m_aPrimitive2DSequence(),
+    m_aRange()
 {
     xOLERef.Lock();
     xOLERef.SetViewAspect( nAspect );
@@ -899,6 +908,34 @@ OUString SwOLEObj::GetDescription()
     return SW_RESSTR(STR_OLE);
 }
 
+drawinglayer::primitive2d::Primitive2DContainer SwOLEObj::tryToGetChartContentAsPrimitive2DSequence(basegfx::B2DRange& rRange)
+{
+    if(m_aPrimitive2DSequence.empty() && m_aRange.isEmpty() && xOLERef.is() && xOLERef.IsChart())
+    {
+        const uno::Reference< frame::XModel > aXModel(xOLERef->getComponent(), uno::UNO_QUERY);
+
+        if(aXModel.is())
+        {
+            m_aPrimitive2DSequence = ChartHelper::tryToGetChartContentAsPrimitive2DSequence(
+                aXModel,
+                m_aRange);
+        }
+    }
+
+    if(!m_aPrimitive2DSequence.empty() && !m_aRange.isEmpty())
+    {
+        rRange = m_aRange;
+    }
+
+    return m_aPrimitive2DSequence;
+}
+
+void SwOLEObj::resetBufferedData()
+{
+    m_aPrimitive2DSequence = drawinglayer::primitive2d::Primitive2DContainer();
+    m_aRange.reset();
+}
+
 SwOLELRUCache::SwOLELRUCache()
     : utl::ConfigItem(OUString("Office.Common/Cache"))
     , m_nLRU_InitSize( 20 )