sc/inc/SheetView.hxx                     |   36 +++++++++++++++++++++++--
 sc/inc/SheetViewManager.hxx              |    6 +---
 sc/source/core/data/SheetView.cxx        |   43 ++++++++++++++++++-------------
 sc/source/core/data/SheetViewManager.cxx |   34 ++----------------------
 sc/source/ui/view/viewfunc.cxx           |    9 +++++-
 5 files changed, 70 insertions(+), 58 deletions(-)

New commits:
commit caca64b2720de17259c6d60c4de62a8ccd7ece3c
Author:     Tomaž Vajngerl <[email protected]>
AuthorDate: Fri Sep 12 21:57:29 2025 +0200
Commit:     Miklos Vajna <[email protected]>
CommitDate: Fri Jan 23 10:32:21 2026 +0100

    sc: introduce SortOrderReverser to handle sort order conversion
    
    SortOrderReverser class handles the reversing of the sort order,
    which is needed on the sheet view and default view level and is
    more or less duplicated code in SheetView and SheetViewManager.
    With SortOrderReverser it is possible to remove the duplication
    and write a unit test just to test reversing the sort.
    
    Change-Id: I7a0726bf71e0b25bcf68403b7c13c3dfac889dd5
    Reviewed-on: https://gerrit.libreoffice.org/c/core/+/190910
    Reviewed-by: Tomaž Vajngerl <[email protected]>
    Tested-by: Jenkins
    Reviewed-on: https://gerrit.libreoffice.org/c/core/+/197820
    Tested-by: Jenkins CollaboraOffice <[email protected]>
    Reviewed-by: Miklos Vajna <[email protected]>

diff --git a/sc/inc/SheetView.hxx b/sc/inc/SheetView.hxx
index 5c36ddf01fc8..3a45450c9d79 100644
--- a/sc/inc/SheetView.hxx
+++ b/sc/inc/SheetView.hxx
@@ -13,11 +13,35 @@
 #include "types.hxx"
 #include <rtl/ustring.hxx>
 #include "SheetViewTypes.hxx"
+#include <optional>
 
 class ScTable;
 
 namespace sc
 {
+/** Stores the sort order and can reverse the sorting of rows (unsorting). */
+struct SortOrderReverser
+{
+public:
+    SCROW mnFirstRow;
+    SCROW mnLastRow;
+    std::vector<SCCOLROW> maOrder;
+
+    /** Reverse the sort for the input row and output the unsorted row.
+     *
+     * Uses the sort order. The row must be between range of [first row, last 
row]
+     * or it will return the input row without modification.
+     **/
+    SCROW unsort(SCROW nRow) const;
+
+    /** Adds or combines the order indices.
+     *
+     * Adds the indices if none are present, or combines the indices if the 
order indices
+     * were already added previously.
+     **/
+    void addOrderIndices(std::vector<SCCOLROW> const& rOrder, SCROW firstRow, 
SCROW lastRow);
+};
+
 /** Stores information of a sheet view.
  *
  * A sheet view is a special view of a sheet that can be filtered and sorted
@@ -30,9 +54,7 @@ private:
     bool mbSynced = true;
     OUString maName;
 
-    SCROW mnFirstRow;
-    SCROW mnLastRow;
-    std::vector<SCCOLROW> maOrder;
+    std::optional<SortOrderReverser> moSortOrder;
     SheetViewID mnID;
 
 public:
@@ -53,8 +75,14 @@ public:
     /** Is the sheet view synced with its default view. */
     bool isSynced() const { return mbSynced; }
 
+    std::optional<SortOrderReverser> const& getSortOrder() const { return 
moSortOrder; }
+
+    /** Adds or combines the order indices.
+     *
+     * Adds the indices if none are present, or combines the indices if the 
order indices
+     * were already added previously.
+     **/
     void addOrderIndices(std::vector<SCCOLROW> const& rOrder, SCROW firstRow, 
SCROW lastRow);
-    SCROW unsort(SCROW nRow) const;
 };
 }
 
diff --git a/sc/inc/SheetViewManager.hxx b/sc/inc/SheetViewManager.hxx
index a0e6527b1d11..205f08feb682 100644
--- a/sc/inc/SheetViewManager.hxx
+++ b/sc/inc/SheetViewManager.hxx
@@ -28,9 +28,7 @@ private:
     std::vector<std::shared_ptr<SheetView>> maViews;
     sal_Int32 maNameCounter = 0;
 
-    std::vector<SCCOLROW> maOrder;
-    SCROW mnFirstRow;
-    SCROW mnLastRow;
+    std::optional<SortOrderReverser> moSortOrder;
 
     bool isValidSheetViewID(SheetViewID nID) const
     {
@@ -70,8 +68,8 @@ public:
 
     static OUString defaultViewName();
 
+    std::optional<SortOrderReverser> const& getSortOrder() const { return 
moSortOrder; }
     void addOrderIndices(std::vector<SCCOLROW> const& rOrder, SCROW firstRow, 
SCROW lastRow);
-    SCROW unsort(SCROW nRow);
 };
 }
 
diff --git a/sc/source/core/data/SheetView.cxx 
b/sc/source/core/data/SheetView.cxx
index a7b103deeb7c..f70a1000c272 100644
--- a/sc/source/core/data/SheetView.cxx
+++ b/sc/source/core/data/SheetView.cxx
@@ -12,25 +12,12 @@
 
 namespace sc
 {
-SheetView::SheetView(ScTable* pTable, OUString const& rName, SheetViewID nID)
-    : mpTable(pTable)
-    , maName(rName)
-    , mnID(nID)
-{
-}
-
-ScTable* SheetView::getTablePointer() const { return mpTable; }
-
-SCTAB SheetView::getTableNumber() const
-{
-    assert(mpTable);
-    return mpTable->GetTab();
-}
-
-void SheetView::addOrderIndices(std::vector<SCCOLROW> const& rOrder, SCROW 
firstRow, SCROW lastRow)
+void SortOrderReverser::addOrderIndices(std::vector<SCCOLROW> const& rOrder, 
SCROW firstRow,
+                                        SCROW lastRow)
 {
     mnFirstRow = firstRow;
     mnLastRow = lastRow;
+
     if (maOrder.empty())
     {
         maOrder = rOrder;
@@ -48,7 +35,7 @@ void SheetView::addOrderIndices(std::vector<SCCOLROW> const& 
rOrder, SCROW first
     }
 }
 
-SCROW SheetView::unsort(SCROW nRow) const
+SCROW SortOrderReverser::unsort(SCROW nRow) const
 {
     if (maOrder.empty())
         return nRow;
@@ -61,6 +48,28 @@ SCROW SheetView::unsort(SCROW nRow) const
     }
     return nRow;
 }
+
+SheetView::SheetView(ScTable* pTable, OUString const& rName, SheetViewID nID)
+    : mpTable(pTable)
+    , maName(rName)
+    , mnID(nID)
+{
+}
+
+ScTable* SheetView::getTablePointer() const { return mpTable; }
+
+SCTAB SheetView::getTableNumber() const
+{
+    assert(mpTable);
+    return mpTable->GetTab();
+}
+
+void SheetView::addOrderIndices(std::vector<SCCOLROW> const& rOrder, SCROW 
firstRow, SCROW lastRow)
+{
+    if (!moSortOrder)
+        moSortOrder.emplace();
+    moSortOrder->addOrderIndices(rOrder, firstRow, lastRow);
+}
 }
 
 /* vim:set shiftwidth=4 softtabstop=4 expandtab: */
diff --git a/sc/source/core/data/SheetViewManager.cxx 
b/sc/source/core/data/SheetViewManager.cxx
index 02a791dab158..f021a26ba306 100644
--- a/sc/source/core/data/SheetViewManager.cxx
+++ b/sc/source/core/data/SheetViewManager.cxx
@@ -133,37 +133,9 @@ OUString SheetViewManager::defaultViewName() { return 
ScResId(STR_SHEET_VIEW_DEF
 void SheetViewManager::addOrderIndices(std::vector<SCCOLROW> const& rOrder, 
SCROW nFirstRow,
                                        SCROW nLastRow)
 {
-    mnFirstRow = nFirstRow;
-    mnLastRow = nLastRow;
-    if (maOrder.empty())
-    {
-        maOrder = rOrder;
-    }
-    else
-    {
-        assert(maOrder.size() == rOrder.size());
-        std::vector<SCCOLROW> newOrder(maOrder.size());
-        for (size_t nIndex = 0; nIndex < maOrder.size(); ++nIndex)
-        {
-            size_t nSortedIndex = rOrder[nIndex];
-            newOrder[nIndex] = maOrder[nSortedIndex - 1];
-        }
-        maOrder = newOrder;
-    }
-}
-
-SCROW SheetViewManager::unsort(SCROW nRow)
-{
-    if (maOrder.empty())
-        return nRow;
-
-    if (nRow >= mnFirstRow && nRow <= mnLastRow)
-    {
-        size_t index = nRow - mnFirstRow;
-        auto nUnsortedRow = mnFirstRow + maOrder[index] - 1;
-        return nUnsortedRow;
-    }
-    return nRow;
+    if (!moSortOrder)
+        moSortOrder.emplace();
+    moSortOrder->addOrderIndices(rOrder, nFirstRow, nLastRow);
 }
 }
 
diff --git a/sc/source/ui/view/viewfunc.cxx b/sc/source/ui/view/viewfunc.cxx
index 77b584dfbab7..30c0dce7d68f 100644
--- a/sc/source/ui/view/viewfunc.cxx
+++ b/sc/source/ui/view/viewfunc.cxx
@@ -852,7 +852,8 @@ void ScViewFunc::EnterData( SCCOL nCol, SCROW nRow, SCTAB 
nTab,
                 if (GetViewData().GetSheetViewID() == sc::DefaultSheetViewID)
                 {
                     SCROW nUnsortedRow = nRow;
-                    nUnsortedRow = pManager->unsort(nUnsortedRow);
+                    if (pManager->getSortOrder())
+                        nUnsortedRow = 
pManager->getSortOrder()->unsort(nUnsortedRow);
                     applyText(*this, nCol, nUnsortedRow, nSheetViewTab, 
rString, bNumFmtChanged);
                 }
                 else if (GetViewData().GetSheetViewID() == pSheetView->getID())
@@ -871,7 +872,11 @@ void ScViewFunc::EnterData( SCCOL nCol, SCROW nRow, SCTAB 
nTab,
                 if (nSheetViewID != sc::DefaultSheetViewID)
                 {
                     auto pSheetView = pManager->get(nSheetViewID);
-                    nUnsortedRow = pSheetView->unsort(nUnsortedRow);
+
+                    if (pSheetView->getSortOrder())
+                        nUnsortedRow = 
pSheetView->getSortOrder()->unsort(nUnsortedRow);
+                    if (pManager->getSortOrder())
+                        nUnsortedRow = 
pManager->getSortOrder()->unsort(nUnsortedRow);
                 }
                 applyText(*this, nCol, nUnsortedRow, rTab, rString, 
bNumFmtChanged);
             }

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