tdf#92160 - sc: limit search results to 1000 entries.

Very large replace results give huge space consumption in the
display widget, and are of dubious usefulness.

Change-Id: Ib8ad01a673ea52976befaf958f8f695aca2190ae
Reviewed-on: https://gerrit.libreoffice.org/30574Reviewed-by: Michael Meeks <michael.meeks@collabora.com>
Tested-by: Michael Meeks <michael.meeks@collabora.com>

sc/source/ui/dialogs/searchresults.cxx

@@ -26,6 +26,8 @@ SearchResultsDlg::SearchResultsDlg( SfxBindings* _pBindings, vcl::Window* pParen
     ModelessDialog(pParent, "SearchResultsDialog", "modules/scalc/ui/searchresults.ui"),
     mpBindings(_pBindings), mpDoc(nullptr)
 {
+    get(mpLabel, "skipped");
+
     SvSimpleTableContainer *pContainer = get<SvSimpleTableContainer>("results");
     Size aControlSize(150, 120);
     aControlSize = pContainer->LogicToPixel(aControlSize, MapUnit::MapAppFont);
@@ -47,18 +49,76 @@ SearchResultsDlg::~SearchResultsDlg()
 void SearchResultsDlg::dispose()
 {
     mpList.disposeAndClear();
+    mpLabel.disposeAndClear();
     ModelessDialog::dispose();
 }
 
+namespace
+{
+    class ListWrapper {
+        size_t mnCount;
+        const size_t mnMaximum;
+        OUStringBuffer maName;
+        VclPtr<FixedText> mpLabel;
+        VclPtr<SvSimpleTable> mpList;
+    public:
+        ListWrapper(const VclPtr<SvSimpleTable> &pList,
+                    const VclPtr<FixedText> &pLabel) :
+            mnCount(0),
+            mnMaximum(1000),
+            mpLabel(pLabel),
+            mpList(pList)
+        {
+            mpList->Clear();
+            mpList->SetUpdateMode(false);
+        }
+        void Insert(const OUString &aTabName,
+                    const ScAddress &rPos,
+                    formula::FormulaGrammar::AddressConvention eConvention,
+                    const OUString &aText)
+        {
+            if (mnCount++ < mnMaximum)
+            {
+                maName.append(aTabName);
+                maName.append("\t");
+                maName.append(rPos.Format(ScRefFlags::ADDR_ABS,
+                                          nullptr, eConvention));
+                maName.append("\t");
+                maName.append(aText);
+                mpList->InsertEntry(maName.makeStringAndClear());
+            }
+        }
+        void Update()
+        {
+            if (mnCount > mnMaximum)
+            {
+                if (mpLabel)
+                {
+                    size_t nSkipped = mnCount - mnMaximum;
+                    OUString aSkipped(mpLabel->GetText());
+                    mpList->InsertEntry(
+                        aSkipped.replaceFirst("$1", OUString::number(nSkipped)));
+                }
+            }
+            mpList->SetUpdateMode(true);
+        }
+    };
+}
+
 void SearchResultsDlg::FillResults( ScDocument* pDoc, const ScRangeList &rMatchedRanges, bool bCellNotes )
 {
-    mpList->Clear();
-    mpList->SetUpdateMode(false);
+    ListWrapper aList(mpList, mpLabel);
     std::vector<OUString> aTabNames = pDoc->GetAllTableNames();
     SCTAB nTabCount = aTabNames.size();
+
+    // tdf#92160 - too many results blow the widget's mind
+    size_t nMatchMax = rMatchedRanges.size();
+    if (nMatchMax > 1000)
+        nMatchMax = 1000;
+
     if (bCellNotes)
     {
-        for (size_t i = 0, n = rMatchedRanges.size(); i < n; ++i)
+        for (size_t i = 0, n = nMatchMax; i < n; ++i)
         {
             /* TODO: a CellNotes iterator would come handy and migt speed
              * things up a little, though we only loop through the
@@ -77,10 +137,9 @@ void SearchResultsDlg::FillResults( ScDocument* pDoc, const ScRangeList &rMatche
                     {
                         const ScPostIt* pNote = pDoc->GetNote( aPos);
                         if (pNote)
-                        {
-                            OUString aPosStr = aPos.Format(ScRefFlags::ADDR_ABS, nullptr, pDoc->GetAddressConvention());
-                            mpList->InsertEntry(aTabNames[aPos.Tab()] + "\t" + aPosStr + "\t" + pNote->GetText());
-                        }
+                            aList.Insert(aTabNames[aPos.Tab()], aPos,
+                                         pDoc->GetAddressConvention(),
+                                         pNote->GetText());
                     }
                 }
             }
@@ -88,7 +147,7 @@ void SearchResultsDlg::FillResults( ScDocument* pDoc, const ScRangeList &rMatche
     }
     else
     {
-        for (size_t i = 0, n = rMatchedRanges.size(); i < n; ++i)
+        for (size_t i = 0, n = nMatchMax; i < n; ++i)
         {
             ScCellIterator aIter(pDoc, *rMatchedRanges[i]);
             for (bool bHas = aIter.first(); bHas; bHas = aIter.next())
@@ -98,13 +157,13 @@ void SearchResultsDlg::FillResults( ScDocument* pDoc, const ScRangeList &rMatche
                     // Out-of-bound sheet index.
                     continue;
 
-                OUString aPosStr = aPos.Format(ScRefFlags::ADDR_ABS, nullptr, pDoc->GetAddressConvention());
-                mpList->InsertEntry(aTabNames[aPos.Tab()] + "\t" + aPosStr + "\t" + pDoc->GetString(aPos));
+                aList.Insert(aTabNames[aPos.Tab()], aPos,
+                             pDoc->GetAddressConvention(),
+                             pDoc->GetString(aPos));
             }
         }
     }
-    mpList->SetUpdateMode(true);
-
+    aList.Update();
     mpDoc = pDoc;
 }
 

sc/source/ui/inc/searchresults.hxx

@@ -23,6 +23,7 @@ namespace sc {
 class SearchResultsDlg : public ModelessDialog
 {
     VclPtr<SvSimpleTable> mpList;
+    VclPtr<FixedText> mpLabel;
     SfxBindings* mpBindings;
     ScDocument* mpDoc;
 

sc/uiconfig/scalc/ui/searchresults.ui

@@ -53,6 +53,13 @@
             <property name="position">1</property>
           </packing>
         </child>
+        <child>
+          <object class="GtkLabel" id="skipped">
+            <property name="visible">False</property>
+            <property name="can_focus">False</property>
+            <property name="label" translatable="yes">skipped $1 ...</property>
+          </object>
+        </child>
       </object>
     </child>
     <action-widgets>