tdf#59323: pptx export: add placeholder index to master footer placeholders

OOXML uses placeholder index to determine from which layout placeholder it
should be inheriting styles, position etc.

Added maPlaceholderShapeToIndexMap that stores corresponding Placeholder index
for a Placeholder XShape on the master slide.

Right now only used for placeholder types Footer, DateAndTime and SlideNumber.

Change-Id: If788f235d00b6d1cde7194d9e4a0789e019432c3
Reviewed-on: https://gerrit.libreoffice.org/c/core/+/117010
Tested-by: Jenkins
Reviewed-by: Miklos Vajna <vmiklos@collabora.com>

2 files changed, 59 insertions, 34 deletions

diff --git a/sd/source/filter/eppt/epptooxml.hxx b/sd/source/filter/eppt/epptooxml.hxx
index 93029f073487..fffaa100e00c 100644
--- a/sd/source/filter/eppt/epptooxml.hxx
+++ b/sd/source/filter/eppt/epptooxml.hxx
@@ -118,6 +118,12 @@ private:
 
     static void WriteDiagram(const FSHelperPtr& pFS, PowerPointShapeExport& rDML, const css::uno::Reference<css::drawing::XShape>& rXShape, int nDiagramId);
 
+    /** Create a new placeholder index for a master placeholder shape
+
+        @param rXShape Master placeholder shape
+        @returns Placeholder index
+    */
+    unsigned CreateNewPlaceholderIndex(const css::uno::Reference<css::drawing::XShape>& rXShape);
     /// Should we export as .pptm, ie. do we contain macros?
     bool mbPptm;
 
@@ -142,6 +148,10 @@ private:
 
     ::oox::drawingml::ShapeExport::ShapeHashMap maShapeMap;
 
+    unsigned mnPlaceholderIndexMax; ///< Last used placeholder index
+    /// Map of placeholder indexes for Master placeholders
+    std::unordered_map< css::uno::Reference<css::drawing::XShape>, unsigned > maPlaceholderShapeToIndexMap;
+
     struct AuthorComments {
         sal_Int32 nId;
         sal_Int32 nLastIndex;
diff --git a/sd/source/filter/eppt/pptx-epptooxml.cxx b/sd/source/filter/eppt/pptx-epptooxml.cxx
index 6a8502361061..9bf8069f6dde 100644
--- a/sd/source/filter/eppt/pptx-epptooxml.cxx
+++ b/sd/source/filter/eppt/pptx-epptooxml.cxx
@@ -134,8 +134,35 @@ void WriteSndAc(const FSHelperPtr& pFS, const OUString& sSoundRelId, const OUStr
         pFS->endElement(FSNS(XML_p, XML_stSnd));
         pFS->endElement(FSNS(XML_p, XML_sndAc));
 }
-}
 
+const char* getPlaceholderTypeName(PlaceholderType ePlaceholder)
+{
+    switch (ePlaceholder)
+    {
+        case SlideImage:
+            return "sldImg";
+        case Notes:
+            return "body";
+        case Header:
+            return "hdr";
+        case Footer:
+            return "ftr";
+        case SlideNumber:
+            return "sldNum";
+        case DateAndTime:
+            return "dt";
+        case Outliner:
+            return "body";
+        case Title:
+            return "title";
+        case Subtitle:
+            return "subTitle";
+        default:
+            SAL_INFO("sd.eppt", "warning: unhandled placeholder type: " << ePlaceholder);
+            return "";
+    }
+}
+}
 }
 
 namespace {
@@ -344,6 +371,7 @@ PowerPointExport::PowerPointExport(const Reference< XComponentContext >& rContex
     , mnAnimationNodeIdMax(1)
     , mnDiagramId(1)
     , mbCreateNotes(false)
+    , mnPlaceholderIndexMax(1)
 {
     comphelper::SequenceAsHashMap aArgumentsMap(rArguments);
     mbPptm = aArgumentsMap.getUnpackedValueOrDefault("IsPPTM", false);
@@ -1522,41 +1550,22 @@ ShapeExport& PowerPointShapeExport::WritePlaceholderShape(const Reference< XShap
     mpFS->endElementNS(XML_p, XML_cNvSpPr);
     mpFS->startElementNS(XML_p, XML_nvPr);
 
-    const char* pType = nullptr;
-    switch (ePlaceholder)
+    bool bUsePlaceholderIndex
+        = ePlaceholder == Footer || ePlaceholder == DateAndTime || ePlaceholder == SlideNumber;
+    const char* pType = getPlaceholderTypeName(ePlaceholder);
+
+    SAL_INFO("sd.eppt", "write placeholder " << pType);
+    if (bUsePlaceholderIndex)
     {
-    case SlideImage:
-        pType = "sldImg";
-        break;
-    case Notes:
-        pType = "body";
-        break;
-    case Header:
-        pType = "hdr";
-        break;
-    case Footer:
-        pType = "ftr";
-        break;
-    case SlideNumber:
-        pType = "sldNum";
-        break;
-    case DateAndTime:
-        pType = "dt";
-        break;
-    case Outliner:
-        pType = "body";
-        break;
-    case Title:
-        pType = "title";
-        break;
-    case Subtitle:
-        pType = "subTitle";
-        break;
-    default:
-        SAL_INFO("sd.eppt", "warning: unhandled placeholder type: " << ePlaceholder);
+        mpFS->singleElementNS(
+            XML_p, XML_ph, XML_type, pType, XML_idx,
+            OString::number(
+                static_cast<PowerPointExport*>(GetFB())->CreateNewPlaceholderIndex(xShape)));
+    }
+    else
+    {
+        mpFS->singleElementNS(XML_p, XML_ph, XML_type, pType);
     }
-    SAL_INFO("sd.eppt", "write placeholder " << pType);
-    mpFS->singleElementNS(XML_p, XML_ph, XML_type, pType);
     mpFS->endElementNS(XML_p, XML_nvPr);
     mpFS->endElementNS(XML_p, XML_nvSpPr);
 
@@ -2078,6 +2087,12 @@ void PowerPointExport::WriteDiagram(const FSHelperPtr& pFS, PowerPointShapeExpor
     pFS->endElementNS(XML_p, XML_graphicFrame);
 }
 
+unsigned PowerPointExport::CreateNewPlaceholderIndex(const css::uno::Reference<XShape> &rXShape)
+{
+    maPlaceholderShapeToIndexMap.insert({rXShape, mnPlaceholderIndexMax});
+    return mnPlaceholderIndexMax++;
+}
+
 // UNO component
 extern "C" SAL_DLLPUBLIC_EXPORT uno::XInterface*
 css_comp_Impress_oox_PowerPointExport(uno::XComponentContext* rxCtxt,