speed up exporting very large spreadsheets to pdf(2)

e.g. the one in tdf#102216

instead of copying the data we want back and forth, just share it via
shared_ptr.

takes it from 6min28s to 1m21

Change-Id: I44d174264baa875e1922d1d46ee07de0e8cbaf0b
Reviewed-on: https://gerrit.libreoffice.org/c/core/+/118383
Tested-by: Jenkins
Reviewed-by: Noel Grandin <noel.grandin@collabora.co.uk>

1 files changed, 8 insertions, 6 deletions

diff --git a/sc/source/ui/inc/printfun.hxx b/sc/source/ui/inc/printfun.hxx
index 1a5eddea03cd..9ad5c27e547b 100644
--- a/sc/source/ui/inc/printfun.hxx
+++ b/sc/source/ui/inc/printfun.hxx
@@ -123,9 +123,10 @@ class PrintPageRanges
 public:
     PrintPageRanges();
 
-    std::vector<SCCOL> m_aPageEndX;
-    std::vector<SCROW> m_aPageEndY;
-    std::map<size_t, ScPageRowEntry> m_aPageRows;
+    // use shared_ptr to avoid copying this (potentially large) data back and forth
+    std::shared_ptr<std::vector<SCCOL>> m_xPageEndX;
+    std::shared_ptr<std::vector<SCROW>> m_xPageEndY;
+    std::shared_ptr<std::map<size_t, ScPageRowEntry>> m_xPageRows;
 
     size_t m_nPagesX;
     size_t m_nPagesY;
@@ -165,9 +166,10 @@ struct ScPrintState                         //  Save Variables from ScPrintFunc
     bool bSavedStateRanges;
     sc::PrintPageRangesInput aPrintPageRangesInput;
     size_t nTotalY;
-    std::vector<SCCOL> aPageEndX;
-    std::vector<SCROW> aPageEndY;
-    std::map<size_t, ScPageRowEntry> aPageRows;
+    // use shared_ptr to avoid copying this (potentially large) map back and forth
+    std::shared_ptr<std::vector<SCCOL>> xPageEndX;
+    std::shared_ptr<std::vector<SCROW>> xPageEndY;
+    std::shared_ptr<std::map<size_t, ScPageRowEntry>> xPageRows;
 
     ScPrintState()
         : nPrintTab(0)