sw: shove 2 global variables into SwHyphIter

Change-Id: I0cb6112b0353a5fd0b4dd571d65f2d656e39ba74

sw/inc/splargs.hxx

@@ -22,12 +22,15 @@
 #include <i18nlangtag/lang.h>
 #include <tools/solar.h>
 #include <tools/gen.hxx>
-#include <limits.h>
 
 #include <com/sun/star/linguistic2/XSpellAlternatives.hpp>
 #include <com/sun/star/linguistic2/XSpellChecker1.hpp>
 #include <com/sun/star/linguistic2/XHyphenatedWord.hpp>
 
+#include <functional>
+#include <limits.h>
+
+class SwTextFrm;
 class SwTextNode;
 class SwIndex;
 namespace vcl { class Font; }
@@ -152,6 +155,14 @@ public:
     }
 };
 
+
+namespace sw {
+
+SwTextFrm *
+SwHyphIterCacheLastTxtFrm(SwTextNode *, std::function<SwTextFrm * ()>);
+
+}
+
 #endif
 
 /* vim:set shiftwidth=4 softtabstop=4 expandtab: */

sw/source/core/edit/edlingu.cxx

@@ -155,11 +155,16 @@ public:
 
 class SwHyphIter : public SwLinguIter
 {
+    // With that we save a GetFrm() in Hyphenate //TODO: does it actually matter?
+    const SwTextNode *m_pLastNode;
+    SwTextFrm  *m_pLastFrm;
+    friend SwTextFrm * sw::SwHyphIterCacheLastTxtFrm(SwTextNode *, std::function<SwTextFrm * ()>);
+
     bool bOldIdle;
     static void DelSoftHyph( SwPaM &rPam );
 
 public:
-    SwHyphIter() : bOldIdle(false) {}
+    SwHyphIter() : m_pLastNode(nullptr), m_pLastFrm(nullptr), bOldIdle(false) {}
 
     void Start( SwEditShell *pSh, SwDocPositions eStart, SwDocPositions eEnd );
     void End();
@@ -177,11 +182,6 @@ static SwSpellIter* g_pSpellIter = nullptr;
 static SwConvIter*  g_pConvIter = nullptr;
 static SwHyphIter*  g_pHyphIter = nullptr;
 
-// With that we save a GetFrm() in Hyphenate.
-// Caution: There are external declaration to these pointers in txtedt.cxx!
-const SwTextNode *pLinguNode;
-      SwTextFrm  *pLinguFrm;
-
 SwLinguIter::SwLinguIter()
     : pSh(nullptr)
     , pStart(nullptr)
@@ -249,9 +249,6 @@ void SwLinguIter::_Start( SwEditShell *pShell, SwDocPositions eStart,
     }
 
     pCrsr->SetMark();
-
-    pLinguFrm = nullptr;
-    pLinguNode = nullptr;
 }
 
 void SwLinguIter::_End(bool bRestoreSelection)
@@ -572,6 +569,23 @@ void SwHyphIter::InsertSoftHyph( const sal_Int32 nHyphPos )
     pCrsr->SetMark();
 }
 
+namespace sw {
+
+SwTextFrm *
+SwHyphIterCacheLastTxtFrm(SwTextNode *const pNode,
+        std::function<SwTextFrm * ()> const create)
+{
+    assert(g_pHyphIter);
+    if (pNode != g_pHyphIter->m_pLastNode || !g_pHyphIter->m_pLastFrm)
+    {
+        g_pHyphIter->m_pLastNode = pNode;
+        g_pHyphIter->m_pLastFrm = create();
+    }
+    return g_pHyphIter->m_pLastFrm;
+}
+
+}
+
 bool SwEditShell::HasLastSentenceGotGrammarChecked()
 {
     bool bTextWasGrammarChecked = false;

sw/source/core/txtnode/txtedt.cxx

@@ -1618,12 +1618,12 @@ bool SwTextNode::Hyphenate( SwInterHyphInfo &rHyphInf )
         return false;
     }
 
-    if( pLinguNode != this )
-    {
-        pLinguNode = this;
-        pLinguFrm = static_cast<SwTextFrm*>(getLayoutFrm( GetDoc()->getIDocumentLayoutAccess().GetCurrentLayout(), rHyphInf.GetCrsrPos() ));
-    }
-    SwTextFrm *pFrm = pLinguFrm;
+    SwTextFrm *pFrm = ::sw::SwHyphIterCacheLastTxtFrm(this,
+        [&rHyphInf, this]() {
+            return static_cast<SwTextFrm*>(this->getLayoutFrm(
+                this->GetDoc()->getIDocumentLayoutAccess().GetCurrentLayout(),
+                rHyphInf.GetCrsrPos()));
+        });
     if( pFrm )
         pFrm = &(pFrm->GetFrmAtOfst( rHyphInf.nStart ));
     else