Add a means to check if a namespace exists.

Useful when we just need to check if the stream has a certain namespace
defined. Calling getNamespaceURL() may throw SAXException in such case.

Change-Id: Ib2b7b202492390158270d87bab95d1793c9d8a70

4 files changed, 28 insertions, 1 deletions

diff --git a/oox/Library_oox.mk b/oox/Library_oox.mk
index b7e763c6f575..0a4fc04e0360 100644
--- a/oox/Library_oox.mk
+++ b/oox/Library_oox.mk
@@ -40,6 +40,7 @@ $(eval $(call gb_Library_use_libraries,oox,\
     cppuhelper \
     editeng \
     drawinglayer \
+    fastsax \
     msfilter \
     sal \
 	i18nlangtag \
diff --git a/oox/source/core/fastparser.cxx b/oox/source/core/fastparser.cxx
index 03fd60a7481e..70e12a896098 100644
--- a/oox/source/core/fastparser.cxx
+++ b/oox/source/core/fastparser.cxx
@@ -25,6 +25,8 @@
 #include "oox/helper/storagebase.hxx"
 #include "oox/token/namespacemap.hxx"
 
+#include "sax/fastparser.hxx"
+
 namespace oox {
 namespace core {
 
@@ -66,11 +68,13 @@ InputStreamCloseGuard::~InputStreamCloseGuard()
 // ============================================================================
 
 FastParser::FastParser( const Reference< XComponentContext >& rxContext ) throw( RuntimeException ) :
-    mrNamespaceMap( StaticNamespaceMap::get() )
+    mrNamespaceMap( StaticNamespaceMap::get() ),
+    mpParser(NULL)
 {
     // create a fast parser instance
     Reference< XMultiComponentFactory > xFactory( rxContext->getServiceManager(), UNO_SET_THROW );
     mxParser.set( xFactory->createInstanceWithContext( "com.sun.star.xml.sax.FastParser", rxContext ), UNO_QUERY_THROW );
+    mpParser = dynamic_cast<sax_fastparser::FastSaxParser*>(mxParser.get());
 
     // create the fast tokenhandler
     mxTokenHandler.set( new FastTokenHandler );
@@ -131,6 +135,17 @@ OUString FastParser::getNamespaceURL( const OUString& rPrefix ) throw( IllegalAr
     return mxParser->getNamespaceURL( rPrefix );
 }
 
+bool FastParser::hasNamespaceURL( const OUString& rPrefix ) const
+{
+    if (!mxParser.is())
+        throw RuntimeException();
+
+    if (!mpParser)
+        return false;
+
+    return mpParser->hasNamespaceURL(rPrefix);
+}
+
 sal_Int32 FastParser::getNamespaceId( const OUString& rUrl )
 {
     for( NamespaceMap::const_iterator aIt = mrNamespaceMap.begin(), aEnd = mrNamespaceMap.end(); aIt != aEnd; ++aIt )
diff --git a/oox/source/core/fragmenthandler2.cxx b/oox/source/core/fragmenthandler2.cxx
index 668eb7fbee49..8133b7382133 100644
--- a/oox/source/core/fragmenthandler2.cxx
+++ b/oox/source/core/fragmenthandler2.cxx
@@ -67,6 +67,12 @@ bool FragmentHandler2::prepareMceContext( sal_Int32 nElement, const AttributeLis
         case MCE_TOKEN( Choice ):
             {
                 OUString aRequires = rAttribs.getString( ( XML_Requires ), OUString("none") );
+                if (!getFilter().hasNamespaceURL(aRequires))
+                    // Check to see if we have this namespace defined first,
+                    // because calling getNamespaceURL() would throw if the
+                    // namespace doesn't exist.
+                    return false;
+
                 aRequires = getFilter().getNamespaceURL( aRequires );
                 if( getFilter().getNamespaceId( aRequires ) > 0 && !aMceState.empty() && aMceState.back() == MCE_STARTED )
                     aMceState.back() = MCE_FOUND_CHOICE;
diff --git a/oox/source/core/xmlfilterbase.cxx b/oox/source/core/xmlfilterbase.cxx
index 30f384898ce9..ea2cc07f86f0 100644
--- a/oox/source/core/xmlfilterbase.cxx
+++ b/oox/source/core/xmlfilterbase.cxx
@@ -300,6 +300,11 @@ OUString XmlFilterBase::getNamespaceURL( const OUString& rPrefix )
     return mxImpl->maFastParser.getNamespaceURL( rPrefix );
 }
 
+bool XmlFilterBase::hasNamespaceURL( const OUString& rPrefix ) const
+{
+    return mxImpl->maFastParser.hasNamespaceURL(rPrefix);
+}
+
 sal_Int32 XmlFilterBase::getNamespaceId( const OUString& rUrl )
 {
      return mxImpl->maFastParser.getNamespaceId( rUrl );