fdo#38635: some assertions that the border start/end points match

From: Michael Stahl <mstahl@redhat.com>

This does not work in general, the assertions trigger when borders are
merged, as can easily happen for table cells.
---

 sw/source/core/layout/paintfrm.cxx |   50 ++++++++++++++++++++++++++++++++++++
 1 files changed, 50 insertions(+), 0 deletions(-)


diff --git a/sw/source/core/layout/paintfrm.cxx b/sw/source/core/layout/paintfrm.cxx
index 0600d2e..0e5d3aa 100644
--- a/sw/source/core/layout/paintfrm.cxx
+++ b/sw/source/core/layout/paintfrm.cxx
@@ -239,6 +239,10 @@ public:
 
 //----------------- End of classes for border lines ----------------------
 
+#ifdef DBG_UTIL
+static BorderLinePrimitive2D * g_pDebugLines[4] = {0,0,0,0};
+#endif
+
 static ViewShell *pGlobalShell = 0;
 
 //Only repaint the Fly content as well as the background of the Fly content if
@@ -4621,6 +4625,49 @@ lcl_MakeBorderLine(SwRect const& rRect,
             rBorder.GetColorGap().getBColor(), rBorder.HasGapColor(),
             rBorder.GetStyle() );
     g_pBorderLines->AddBorderLine(xLine);
+#ifdef DBG_UTIL
+    size_t ix = isLeftOrTopBorderInModel ? isVerticalInModel ? 0 : 2 : isVerticalInModel ? 1 : 3;
+    g_pDebugLines[ix] = xLine.get();
+    switch (ix)
+    {
+        case 1:
+            if (isVerticalInModel == isVertical)
+            {
+                assert(!g_pDebugLines[0] || g_pDebugLines[0]->getStart().getY() == g_pDebugLines[1]->getStart().getY());
+                assert(!g_pDebugLines[0] || g_pDebugLines[0]->getEnd().getY() == g_pDebugLines[1]->getEnd().getY());
+            }
+            else
+            {
+                assert(!g_pDebugLines[0] || g_pDebugLines[0]->getStart().getX() == g_pDebugLines[1]->getStart().getX());
+                assert(!g_pDebugLines[0] || g_pDebugLines[0]->getEnd().getX() == g_pDebugLines[1]->getEnd().getX());
+            }
+            break;
+        case 2:
+            if (isVerticalInModel == isVertical)
+            {
+                assert(!g_pDebugLines[0] || g_pDebugLines[0]->getStart() == g_pDebugLines[2]->getStart());
+                assert(!g_pDebugLines[1] || g_pDebugLines[1]->getStart() == g_pDebugLines[2]->getEnd());
+            }
+            else
+            {
+                assert(!g_pDebugLines[0] || g_pDebugLines[0]->getEnd() == g_pDebugLines[2]->getStart());
+                assert(!g_pDebugLines[1] || g_pDebugLines[1]->getEnd() == g_pDebugLines[2]->getEnd());
+            }
+            break;
+        case 3:
+            if (isVerticalInModel == isVertical)
+            {
+                assert(!g_pDebugLines[0] || g_pDebugLines[0]->getEnd() == g_pDebugLines[3]->getStart());
+                assert(!g_pDebugLines[1] || g_pDebugLines[1]->getEnd() == g_pDebugLines[3]->getEnd());
+            }
+            else
+            {
+                assert(!g_pDebugLines[0] || g_pDebugLines[0]->getStart() == g_pDebugLines[3]->getStart());
+                assert(!g_pDebugLines[1] || g_pDebugLines[1]->getStart() == g_pDebugLines[3]->getEnd());
+            }
+            break;
+    }
+#endif
 }
 
 // OD 19.05.2003 #109667# - merge <lcl_PaintLeftLine> and <lcl_PaintRightLine>
@@ -5095,6 +5142,9 @@ void SwFrm::PaintBorder( const SwRect& rRect, const SwPageFrm *pPage,
                     ::lcl_PaintTopBottomLine(sal_False, *(this), *(pPage), aRect, rRect, rAttrs, fnRect);
                 }
             }
+#ifdef DBG_UTIL
+            g_pDebugLines[0] = g_pDebugLines[1] = g_pDebugLines[2] = g_pDebugLines[3] = 0;
+#endif
         }
         rAttrs.SetGetCacheLine( sal_False );
     }