tdf143222 Handle alternate content of graphicData element.

Handle alternate content and make true choice.

According to ooxml spec ole object requires exactly one pic
element. (ECMA-376 Part 1, Annex A, CT_OleObject). In the
current case first choice has not pic element and we should
allow fallback processing.

Change-Id: I30b7de703b8c2f00d6bf286e05eea505ac3627f2
Reviewed-on: https://gerrit.libreoffice.org/c/core/+/118539
Tested-by: Jenkins
Reviewed-by: Gülşah Köse <gulsah.kose@collabora.com>

3 files changed, 95 insertions, 71 deletions

diff --git a/oox/source/core/contexthandler2.cxx b/oox/source/core/contexthandler2.cxx
index 8ce9784b99ef..1613a3d330cc 100644
--- a/oox/source/core/contexthandler2.cxx
+++ b/oox/source/core/contexthandler2.cxx
@@ -18,16 +18,20 @@
  */
 
 #include <oox/core/contexthandler2.hxx>
+#include <oox/core/xmlfilterbase.hxx>
 #include <oox/helper/attributelist.hxx>
 #include <oox/token/namespaces.hxx>
 #include <oox/token/tokens.hxx>
 #include <rtl/ustrbuf.hxx>
 #include <o3tl/safeint.hxx>
 #include <osl/diagnose.h>
+#include <com/sun/star/frame/XModel.hpp>
+#include <com/sun/star/lang/XServiceInfo.hpp>
 
 namespace oox::core {
 
 using namespace ::com::sun::star::uno;
+using namespace ::com::sun::star::lang;
 using namespace ::com::sun::star::xml::sax;
 
 /** Information about a processed element. */
@@ -40,10 +44,11 @@ struct ElementInfo
     explicit     ElementInfo() : maChars( 0), mnElement( XML_TOKEN_INVALID ), mbTrimSpaces( false ) {}
 };
 
-ContextHandler2Helper::ContextHandler2Helper( bool bEnableTrimSpace ) :
+ContextHandler2Helper::ContextHandler2Helper( bool bEnableTrimSpace, XmlFilterBase& rFilter ) :
     mxContextStack( std::make_shared<ContextStack>() ),
     mnRootStackSize( 0 ),
-    mbEnableTrimSpace( bEnableTrimSpace )
+    mbEnableTrimSpace( bEnableTrimSpace ),
+    mrFilter( rFilter )
 {
     pushElementInfo( XML_ROOT_CONTEXT );
 }
@@ -51,7 +56,8 @@ ContextHandler2Helper::ContextHandler2Helper( bool bEnableTrimSpace ) :
 ContextHandler2Helper::ContextHandler2Helper( const ContextHandler2Helper& rParent ) :
     mxContextStack( rParent.mxContextStack ),
     mnRootStackSize( rParent.mxContextStack->size() ),
-    mbEnableTrimSpace( rParent.mbEnableTrimSpace )
+    mbEnableTrimSpace( rParent.mbEnableTrimSpace ),
+    mrFilter(rParent.mrFilter)
 {
 }
 
@@ -188,6 +194,13 @@ ContextHandler2::~ContextHandler2()
 Reference< XFastContextHandler > SAL_CALL ContextHandler2::createFastChildContext(
         sal_Int32 nElement, const Reference< XFastAttributeList >& rxAttribs )
 {
+    if( getNamespace( nElement ) == NMSP_mce ) // TODO for checking 'Ignorable'
+    {
+        if( prepareMceContext( nElement, AttributeList( rxAttribs ) ) )
+            return this;
+        return nullptr;
+    }
+
     return implCreateChildContext( nElement, rxAttribs );
 }
 
@@ -207,6 +220,72 @@ void SAL_CALL ContextHandler2::endFastElement( sal_Int32 nElement )
     implEndElement( nElement );
 }
 
+bool ContextHandler2Helper::prepareMceContext( sal_Int32 nElement, const AttributeList& rAttribs )
+{
+    switch( nElement )
+    {
+        case MCE_TOKEN( AlternateContent ):
+            addMCEState( MCE_STATE::Started );
+            break;
+
+        case MCE_TOKEN( Choice ):
+            {
+                if (isMCEStateEmpty() || getMCEState() != MCE_STATE::Started)
+                    return false;
+
+                OUString aRequires = rAttribs.getString( XML_Requires, "none" );
+
+                // At this point we can't access namespaces as the correct xml filter
+                // is long gone. For now let's decide depending on a list of supported
+                // namespaces like we do in writerfilter
+
+                std::vector<OUString> aSupportedNS =
+                {
+                    "a14", // Impress needs this to import math formulas.
+                    "p14",
+                    "p15",
+                    "x12ac",
+                    "v"
+                };
+
+                Reference<XServiceInfo> xModel(getDocFilter().getModel(), UNO_QUERY);
+                if (xModel.is() && xModel->supportsService("com.sun.star.sheet.SpreadsheetDocument"))
+                {
+                    // No a14 for Calc documents, it would cause duplicated shapes as-is.
+                    auto it = std::find(aSupportedNS.begin(), aSupportedNS.end(), "a14");
+                    if (it != aSupportedNS.end())
+                    {
+                        aSupportedNS.erase(it);
+                    }
+                }
+
+                if (std::find(aSupportedNS.begin(), aSupportedNS.end(), aRequires) != aSupportedNS.end())
+                    setMCEState( MCE_STATE::FoundChoice ) ;
+                else
+                    return false;
+            }
+            break;
+
+        case MCE_TOKEN( Fallback ):
+            if( !isMCEStateEmpty() && getMCEState() == MCE_STATE::Started )
+                break;
+            return false;
+        default:
+            {
+                OUString str = rAttribs.getString( MCE_TOKEN( Ignorable ), OUString() );
+                if( !str.isEmpty() )
+                {
+                    // Sequence< css::xml::FastAttribute > attrs = rAttribs.getFastAttributeList()->getFastAttributes();
+                    // printf("MCE: %s\n", OUStringToOString( str, RTL_TEXTENCODING_UTF8 ).getStr() );
+                    // TODO: Check & Get the namespaces in "Ignorable"
+                    // printf("NS: %d : %s\n", attrs.getLength(), OUStringToOString( str, RTL_TEXTENCODING_UTF8 ).getStr() );
+                }
+            }
+            return false;
+    }
+    return true;
+}
+
 // oox.core.RecordContext interface -------------------------------------------
 
 ContextHandlerRef ContextHandler2::createRecordContext( sal_Int32 nRecId, SequenceInputStream& rStrm )
diff --git a/oox/source/core/fragmenthandler2.cxx b/oox/source/core/fragmenthandler2.cxx
index 121f3443731f..3ee410fad854 100644
--- a/oox/source/core/fragmenthandler2.cxx
+++ b/oox/source/core/fragmenthandler2.cxx
@@ -34,7 +34,7 @@ using namespace ::com::sun::star::xml::sax;
 
 FragmentHandler2::FragmentHandler2( XmlFilterBase& rFilter, const OUString& rFragmentPath, bool bEnableTrimSpace ) :
     FragmentHandler( rFilter, rFragmentPath ),
-    ContextHandler2Helper( bEnableTrimSpace )
+    ContextHandler2Helper( bEnableTrimSpace, rFilter )
 {
 }
 
@@ -54,72 +54,6 @@ void SAL_CALL FragmentHandler2::endDocument()
     finalizeImport();
 }
 
-bool FragmentHandler2::prepareMceContext( sal_Int32 nElement, const AttributeList& rAttribs )
-{
-    switch( nElement )
-    {
-        case MCE_TOKEN( AlternateContent ):
-            aMceState.push_back( MCE_STATE::Started );
-            break;
-
-        case MCE_TOKEN( Choice ):
-            {
-                if (aMceState.empty() || aMceState.back() != MCE_STATE::Started)
-                    return false;
-
-                OUString aRequires = rAttribs.getString( XML_Requires, "none" );
-
-                // At this point we can't access namespaces as the correct xml filter
-                // is long gone. For now let's decide depending on a list of supported
-                // namespaces like we do in writerfilter
-
-                std::vector<OUString> aSupportedNS =
-                {
-                    "a14", // Impress needs this to import math formulas.
-                    "p14",
-                    "p15",
-                    "x12ac",
-                    "v",
-                };
-
-                uno::Reference<lang::XServiceInfo> xModel(getFilter().getModel(), uno::UNO_QUERY);
-                if (xModel.is() && xModel->supportsService("com.sun.star.sheet.SpreadsheetDocument"))
-                {
-                    // No a14 for Calc documents, it would cause duplicated shapes as-is.
-                    auto it = std::find(aSupportedNS.begin(), aSupportedNS.end(), "a14");
-                    if (it != aSupportedNS.end())
-                    {
-                        aSupportedNS.erase(it);
-                    }
-                }
-
-                if (std::find(aSupportedNS.begin(), aSupportedNS.end(), aRequires) != aSupportedNS.end())
-                    aMceState.back() = MCE_STATE::FoundChoice;
-                else
-                    return false;
-            }
-            break;
-
-        case MCE_TOKEN( Fallback ):
-            if( !aMceState.empty() && aMceState.back() == MCE_STATE::Started )
-                break;
-            return false;
-        default:
-            {
-                OUString str = rAttribs.getString( MCE_TOKEN( Ignorable ), OUString() );
-                if( !str.isEmpty() )
-                {
-                    // Sequence< css::xml::FastAttribute > attrs = rAttribs.getFastAttributeList()->getFastAttributes();
-                    // printf("MCE: %s\n", OUStringToOString( str, RTL_TEXTENCODING_UTF8 ).getStr() );
-                    // TODO: Check & Get the namespaces in "Ignorable"
-                    // printf("NS: %d : %s\n", attrs.getLength(), OUStringToOString( str, RTL_TEXTENCODING_UTF8 ).getStr() );
-                }
-            }
-            return false;
-    }
-    return true;
-}
-
 // com.sun.star.xml.sax.XFastContextHandler interface -------------------------
 
 Reference< XFastContextHandler > SAL_CALL FragmentHandler2::createFastChildContext(
@@ -151,7 +85,7 @@ void SAL_CALL FragmentHandler2::endFastElement( sal_Int32 nElement )
     switch( nElement )
     {
         case MCE_TOKEN( AlternateContent ):
-            aMceState.pop_back();
+            removeMCEState();
             break;
     }
 
diff --git a/oox/source/drawingml/graphicshapecontext.cxx b/oox/source/drawingml/graphicshapecontext.cxx
index 113e5490c51d..3ed00edfd28c 100644
--- a/oox/source/drawingml/graphicshapecontext.cxx
+++ b/oox/source/drawingml/graphicshapecontext.cxx
@@ -214,6 +214,7 @@ ContextHandlerRef OleObjectGraphicDataContext::onCreateContext( sal_Int32 nEleme
             mrOleObjectInfo.maName = rAttribs.getXString( XML_name, OUString() );
             mrOleObjectInfo.maProgId = rAttribs.getXString( XML_progId, OUString() );
             mrOleObjectInfo.mbShowAsIcon = rAttribs.getBool( XML_showAsIcon, false );
+            mrOleObjectInfo.mbHasPicture = false; // Initialize as false
             return this;
         }
         break;
@@ -227,6 +228,7 @@ ContextHandlerRef OleObjectGraphicDataContext::onCreateContext( sal_Int32 nEleme
             mrOleObjectInfo.mbAutoUpdate = rAttribs.getBool( XML_updateAutomatic, false );
         break;
         case PPT_TOKEN( pic ):
+            mrOleObjectInfo.mbHasPicture = true; // Set true if ole object has picture element.
             return new GraphicShapeContext( *this, mpMasterShapePtr, mpShapePtr );
     }
     SAL_WARN("oox", "OleObjectGraphicDataContext::onCreateContext: unhandled element: "
@@ -234,6 +236,15 @@ ContextHandlerRef OleObjectGraphicDataContext::onCreateContext( sal_Int32 nEleme
     return nullptr;
 }
 
+void OleObjectGraphicDataContext::onEndElement()
+{
+    if( getCurrentElement() == PPT_TOKEN( oleObj ) && !isMCEStateEmpty() )
+    {
+        if( getMCEState() == MCE_STATE::FoundChoice && !mrOleObjectInfo.mbHasPicture )
+            setMCEState( MCE_STATE::Started );
+    }
+}
+
 DiagramGraphicDataContext::DiagramGraphicDataContext( ContextHandler2Helper const & rParent, const ShapePtr& pShapePtr )
 : ShapeContext( rParent, ShapePtr(), pShapePtr )
 {