ofz#9917 use a WW8SprmIter to find the sprm

extend WW8SprmIter to support the needed paramater match feature and
drop the custom WW8PLCFx_SEPX::HasSprm logic

Change-Id: I5893e04402ed03493add398f0939a578807561ef
Reviewed-on: https://gerrit.libreoffice.org/59119
Tested-by: Jenkins
Reviewed-by: Michael Stahl <Michael.Stahl@cib.de>

2 files changed, 14 insertions, 27 deletions

diff --git a/sw/source/filter/ww8/ww8scan.cxx b/sw/source/filter/ww8/ww8scan.cxx
index a7e91b17aadd..16cc14b4132d 100644
--- a/sw/source/filter/ww8/ww8scan.cxx
+++ b/sw/source/filter/ww8/ww8scan.cxx
@@ -916,7 +916,7 @@ void WW8SprmIter::UpdateMyMembers()
     }
 }
 
-SprmResult WW8SprmIter::FindSprm(sal_uInt16 nId)
+SprmResult WW8SprmIter::FindSprm(sal_uInt16 nId, sal_uInt8* pNextByteMatch)
 {
     while (GetSprms())
     {
@@ -924,7 +924,13 @@ SprmResult WW8SprmIter::FindSprm(sal_uInt16 nId)
         {
             sal_uInt16 nFixedLen =  mrSprmParser.DistanceToData(nId);
             sal_uInt16 nL = mrSprmParser.GetSprmSize(nId, GetSprms(), GetRemLen());
-            return SprmResult(GetCurrentParams(), nL - nFixedLen); // SPRM found!
+            SprmResult aRet(GetCurrentParams(), nL - nFixedLen); // SPRM found!
+            // typically pNextByteMatch is nullptr and we just return the first match
+            if (!pNextByteMatch)
+                return aRet;
+            // very occasionally we want one with a specific following byte
+            if (aRet.nRemainingData >= 1 && *aRet.pSprm == *pNextByteMatch)
+                return aRet;
         }
         advance();
     }
@@ -3834,32 +3840,13 @@ bool WW8PLCFx_SEPX::Find4Sprms(sal_uInt16 nId1,sal_uInt16 nId2,sal_uInt16 nId3,s
 
 SprmResult WW8PLCFx_SEPX::HasSprm( sal_uInt16 nId, sal_uInt8 n2nd ) const
 {
-    if (!pPLCF)
-        return SprmResult();
-
-    sal_uInt8* pSp = pSprms.get();
-    size_t i = 0;
-    while (i + maSprmParser.MinSprmLen() <= nSprmSiz)
+    SprmResult aRet;
+    if (pPLCF)
     {
-        // Sprm found?
-        const sal_uInt16 nCurrentId = maSprmParser.GetSprmId(pSp);
-        const sal_uInt16 x = maSprmParser.GetSprmSize(nCurrentId, pSp, nSprmSiz - i);
-        if (nCurrentId == nId)
-        {
-            sal_uInt16 nFixedLen =  maSprmParser.DistanceToData(nId);
-            const sal_uInt8 *pRet = pSp + nFixedLen;
-            SprmResult aRet(pRet, x - nFixedLen);
-            if (aRet.nRemainingData >= 1 && *aRet.pSprm == n2nd)
-            {
-                return aRet;
-            }
-        }
-        // increment pointer so that it points to next SPRM
-        i += x;
-        pSp += x;
+        WW8SprmIter aIter(pSprms.get(), nSprmSiz, maSprmParser);
+        aRet = aIter.FindSprm(nId, &n2nd);
     }
-
-    return SprmResult();   // Sprm not found
+    return aRet;
 }
 
 WW8PLCFx_SubDoc::WW8PLCFx_SubDoc(SvStream* pSt, const WW8Fib& rFib,
diff --git a/sw/source/filter/ww8/ww8scan.hxx b/sw/source/filter/ww8/ww8scan.hxx
index 69ff529233a2..e3331305e5a2 100644
--- a/sw/source/filter/ww8/ww8scan.hxx
+++ b/sw/source/filter/ww8/ww8scan.hxx
@@ -282,7 +282,7 @@ public:
     explicit WW8SprmIter(const sal_uInt8* pSprms_, sal_Int32 nLen_,
         const wwSprmParser &rSprmParser);
     void  SetSprms(const sal_uInt8* pSprms_, sal_Int32 nLen_);
-    SprmResult FindSprm(sal_uInt16 nId);
+    SprmResult FindSprm(sal_uInt16 nId, sal_uInt8* pNextByteMatch = nullptr);
     void  advance();
     const sal_uInt8* GetSprms() const
         { return ( pSprms && (0 < nRemLen) ) ? pSprms : nullptr; }