tdf#156565 sw: PDF/UA export: split Link SE at line break

There must be one Link SE per Link Annotation, so ensure that a new one
is created for a new line.

(regression from commit 4c5283a3a1)

Change-Id: I2585d9e22a435d7716f48fec89a78149c129f71d
Reviewed-on: https://gerrit.libreoffice.org/c/core/+/158775
Tested-by: Jenkins
Reviewed-by: Michael Stahl <michael.stahl@allotropia.de>

sw/inc/EnhancedPDFExportHelper.hxx

@@ -183,6 +183,7 @@ class SwTaggedPDFHelper
     ~SwTaggedPDFHelper();
 
     static bool IsExportTaggedPDF( const OutputDevice& rOut );
+    static void EndCurrentLink(OutputDevice const&);
 };
 
 /*

sw/source/core/text/EnhancedPDFExportHelper.cxx

@@ -1698,6 +1698,20 @@ void SwTaggedPDFHelper::EndStructureElements()
     CheckRestoreTag();
 }
 
+void SwTaggedPDFHelper::EndCurrentLink(OutputDevice const& rOut)
+{
+    vcl::PDFExtOutDevData *const pPDFExtOutDevData(
+        dynamic_cast<vcl::PDFExtOutDevData *>(rOut.GetExtOutDevData()));
+    if (pPDFExtOutDevData && pPDFExtOutDevData->GetSwPDFState()->m_oCurrentLink)
+    {
+        pPDFExtOutDevData->GetSwPDFState()->m_oCurrentLink.reset();
+        pPDFExtOutDevData->EndStructureElement();
+#if OSL_DEBUG_LEVEL > 1
+    aStructStack.pop_back();
+#endif
+    }
+}
+
 void SwTaggedPDFHelper::EndCurrentAll()
 {
     if (mpPDFExtOutDevData->GetSwPDFState()->m_oCurrentSpan)

sw/source/core/text/itrpaint.cxx

@@ -162,6 +162,8 @@ void SwTextPainter::DrawTextLine( const SwRect &rPaint, SwSaveClip &rClip,
         roTaggedParagraph.emplace(nullptr, &aFrameInfo, nullptr, *GetInfo().GetOut());
     }
 
+    SwTaggedPDFHelper::EndCurrentLink(*GetInfo().GetOut());
+
     // Optimization!
     SwTwips nMaxRight = std::min<SwTwips>( rPaint.Right(), Right() );
     const SwTwips nTmpLeft = GetInfo().X();