tdf#87348 allow non-sequentially processed textboxes to be linked

The existing code design ONLY allowed textboxes to be linked if they
were basically processed sequentially or reverse sequentially.
It appears that the processing is actually based on the order that
the textboxes were created, which is usually sequential
but not necessarily.

Change-Id: Ieb7b37d4cbd4b3a5b5d474803abccfa198a5864b
Reviewed-on: https://gerrit.libreoffice.org/16353Tested-by: Jenkins <ci@libreoffice.org>
Reviewed-by: Justin Luth <justin_luth@sil.org>
Reviewed-by: Miklos Vajna <vmiklos@collabora.co.uk>

writerfilter/source/dmapper/DomainMapper_Impl.cxx

@@ -2449,91 +2449,73 @@ static uno::Any lcl_getGrabBagValue( const uno::Sequence<beans::PropertyValue>&
 //Link the text frames.
 void DomainMapper_Impl::ChainTextFrames()
 {
-    if( 0 == m_vTextFramesForChaining.size() )
+    //can't link textboxes if there are not even two of them...
+    if( 2 > m_vTextFramesForChaining.size() )
         return ;
 
+    struct TextFramesForChaining {
+        css::uno::Reference< css::drawing::XShape > xShape;
+        sal_Int32 nId;
+        sal_Int32 nSeq;
+        TextFramesForChaining(): xShape(0), nId(0), nSeq(0) {}
+    } ;
+    typedef std::map <OUString, TextFramesForChaining> ChainMap;
+
     try
     {
-        sal_Int32 nTxbxId1  = 0 ; //holds id for the shape in outer loop
-        sal_Int32 nTxbxId2  = 0 ; //holds id for the shape in inner loop
-        sal_Int32 nTxbxSeq1 = 0 ; //holds seq number for the shape in outer loop
-        sal_Int32 nTxbxSeq2 = 0 ; //holds seq number for the shape in inner loop
-        OUString sName1 ; //holds the text box Name for the shape in outer loop
-        OUString sName2 ; //holds the text box Name for the shape in outer loop
+        ChainMap aTextFramesForChainingHelper;
         OUString sChainNextName("ChainNextName");
-        OUString sChainPrevName("ChainPrevName");
 
-        for( std::vector<uno::Reference< drawing::XShape > >::iterator outer_itr = m_vTextFramesForChaining.begin();
-             outer_itr != m_vTextFramesForChaining.end(); )
+        //learn about ALL of the textboxes and their chaining values first - because frames are processed in no specific order.
+        std::vector<uno::Reference< drawing::XShape > >::iterator iter;
+        for( iter = m_vTextFramesForChaining.begin(); iter != m_vTextFramesForChaining.end(); ++iter )
         {
-            bool bIsTxbxChained = false ;
-            uno::Reference<text::XTextContent>  xTextContent1(*outer_itr, uno::UNO_QUERY_THROW);
-            uno::Reference<beans::XPropertySet> xPropertySet1(xTextContent1, uno::UNO_QUERY);
-            uno::Sequence<beans::PropertyValue> aGrabBag1;
-            uno::Reference<lang::XServiceInfo> xServiceInfo1(xPropertySet1, uno::UNO_QUERY);
-            if (xServiceInfo1->supportsService("com.sun.star.text.TextFrame"))
+            uno::Reference<text::XTextContent>  xTextContent(*iter, uno::UNO_QUERY_THROW);
+            uno::Reference<beans::XPropertySet> xPropertySet(xTextContent, uno::UNO_QUERY);
+            uno::Sequence<beans::PropertyValue> aGrabBag;
+            uno::Reference<lang::XServiceInfo> xServiceInfo(xPropertySet, uno::UNO_QUERY);
+
+            TextFramesForChaining aChainStruct = TextFramesForChaining();
+            OUString sShapeName;
+
+            if ( xServiceInfo->supportsService("com.sun.star.text.TextFrame") )
             {
-                xPropertySet1->getPropertyValue("FrameInteropGrabBag") >>= aGrabBag1;
-                xPropertySet1->getPropertyValue("LinkDisplayName") >>= sName1;
+                xPropertySet->getPropertyValue("FrameInteropGrabBag") >>= aGrabBag;
+                xPropertySet->getPropertyValue("LinkDisplayName") >>= sShapeName;
             }
             else
             {
-                xPropertySet1->getPropertyValue("InteropGrabBag") >>= aGrabBag1;
-                xPropertySet1->getPropertyValue("ChainName") >>= sName1;
+                xPropertySet->getPropertyValue("InteropGrabBag") >>= aGrabBag;
+                xPropertySet->getPropertyValue("ChainName") >>= sShapeName;
             }
 
-            lcl_getGrabBagValue( aGrabBag1, "Txbx-Id")  >>= nTxbxId1;
-            lcl_getGrabBagValue( aGrabBag1, "Txbx-Seq") >>= nTxbxSeq1;
-
-            //Check which text box in the document links/(is a link) to this one.
-            std::vector<uno::Reference< drawing::XShape > >::iterator inner_itr = ( outer_itr + 1 );
-            for( ; inner_itr != m_vTextFramesForChaining.end(); ++inner_itr )
-            {
-                uno::Reference<text::XTextContent>  xTextContent2(*inner_itr, uno::UNO_QUERY_THROW);
-                uno::Reference<beans::XPropertySet> xPropertySet2(xTextContent2, uno::UNO_QUERY);
-                uno::Sequence<beans::PropertyValue> aGrabBag2;
-                uno::Reference<lang::XServiceInfo> xServiceInfo2(xPropertySet1, uno::UNO_QUERY);
-                if (xServiceInfo2->supportsService("com.sun.star.text.TextFrame"))
-                {
-                    xPropertySet2->getPropertyValue("FrameInteropGrabBag") >>= aGrabBag2;
-                    xPropertySet2->getPropertyValue("LinkDisplayName") >>= sName2;
-                }
-                else
-                {
-                    xPropertySet2->getPropertyValue("InteropGrabBag") >>= aGrabBag2;
-                    xPropertySet2->getPropertyValue("ChainName") >>= sName2;
-                }
+            lcl_getGrabBagValue( aGrabBag, "Txbx-Id")  >>= aChainStruct.nId;
+            lcl_getGrabBagValue( aGrabBag, "Txbx-Seq") >>= aChainStruct.nSeq;
+            aChainStruct.xShape = *iter;
+            aTextFramesForChainingHelper[sShapeName] = aChainStruct;
+        }
 
-                lcl_getGrabBagValue( aGrabBag2, "Txbx-Id")  >>= nTxbxId2;
-                lcl_getGrabBagValue( aGrabBag2, "Txbx-Seq") >>= nTxbxSeq2;
+        //TODO: Perhaps allow reverse sequences when mso-layout-flow-alt = "bottom-to-top"
+        const sal_Int32 nDirection = 1;
 
-                if ( nTxbxId1 == nTxbxId2 )
+        //Finally - go through and attach the chains based on matching ID and incremented sequence number (dml-style).
+        for (ChainMap::iterator outer_iter= aTextFramesForChainingHelper.begin(); outer_iter != aTextFramesForChainingHelper.end(); ++outer_iter)
+        {
+                for (ChainMap::iterator inner_iter=aTextFramesForChainingHelper.begin(); inner_iter != aTextFramesForChainingHelper.end(); ++inner_iter)
                 {
-                    //who connects whom ??
-                    if ( nTxbxSeq1 == ( nTxbxSeq2 + 1 ) )
-                    {
-                        xPropertySet2->setPropertyValue(sChainNextName, uno::makeAny(sName1));
-                        xPropertySet1->setPropertyValue(sChainPrevName, uno::makeAny(sName2));
-                        bIsTxbxChained = true ;
-                        break ; //there cannot be more than one previous/next frames
-                    }
-                    else if ( nTxbxSeq2 == ( nTxbxSeq1 + 1 ) )
+                    if ( inner_iter->second.nId == outer_iter->second.nId )
                     {
-                        xPropertySet1->setPropertyValue(sChainNextName, uno::makeAny(sName2));
-                        xPropertySet2->setPropertyValue(sChainPrevName, uno::makeAny(sName1));
-                        bIsTxbxChained = true ;
-                        break ; //there cannot be more than one previous/next frames
+                        if (  inner_iter->second.nSeq == ( outer_iter->second.nSeq + nDirection ) )
+                        {
+                            uno::Reference<text::XTextContent>  xTextContent(outer_iter->second.xShape, uno::UNO_QUERY_THROW);
+                            uno::Reference<beans::XPropertySet> xPropertySet(xTextContent, uno::UNO_QUERY);
+
+                            //The reverse chaining happens automatically, so only one direction needs to be set
+                            xPropertySet->setPropertyValue(sChainNextName, uno::makeAny(inner_iter->first));
+                            break ; //there cannot be more than one next frame
+                        }
                     }
                 }
-            }
-            if( bIsTxbxChained )
-            {
-                //This txt box is no longer needed for chaining since
-                //there cannot be more than one previous/next frames
-                outer_itr = m_vTextFramesForChaining.erase(outer_itr);
-            }
-            else
-                ++outer_itr ;
         }
         m_vTextFramesForChaining.clear(); //clear the vector
     }