fdo#34800 Comments added to footer are placed at the right top of the page.

The problem is that the nodes in the Footnote and Footer are stored before
nodes of the document body in the internal structure.

Therefore I wrote this patch to check if the compared
comments are in the Footnote or Footer.
We don't need to check our comment is placed in the header
because it is already the most upper node of the whole document.

Test document: https://bugs.freedesktop.org/attachment.cgi?id=76038

Special thanks to Cédric Bosdonnat and Miklos Vajna

Change-Id: Ibcd0373110fde848dccf93ffe9100459c7cc64a5
Reviewed-on: https://gerrit.libreoffice.org/2572Reviewed-by: Fridrich Strba <fridrich@documentfoundation.org>
Tested-by: Fridrich Strba <fridrich@documentfoundation.org>

sw/source/ui/docvw/PostItMgr.cxx

@@ -90,7 +90,31 @@ using namespace sw::sidebarwindows;
 bool comp_pos(const SwSidebarItem* a, const SwSidebarItem* b)
 {
     // sort by anchor position
-    return a->GetAnchorPosition() < b->GetAnchorPosition();
+    SwPosition aPosAnchorA = a->GetAnchorPosition();
+    SwPosition aPosAnchorB = b->GetAnchorPosition();
+
+    bool aAnchorAInFooter = false;
+    bool aAnchorBInFooter = false;
+
+    // is the anchor placed in Footnote or the Footer?
+    if( aPosAnchorA.nNode.GetNode().FindFootnoteStartNode() || aPosAnchorA.nNode.GetNode().FindFooterStartNode() )
+        aAnchorAInFooter = true;
+    if( aPosAnchorB.nNode.GetNode().FindFootnoteStartNode() || aPosAnchorB.nNode.GetNode().FindFooterStartNode() )
+        aAnchorBInFooter = true;
+
+    // fdo#34800
+    // if AnchorA is in footnote, and AnchorB isn't
+    // we do not want to change over the position
+    if( aAnchorAInFooter && !aAnchorBInFooter )
+        return 0;
+    // if aAnchorA is not placed in a footnote, and aAnchorB is
+    // force a change over
+    else if( !aAnchorAInFooter && aAnchorBInFooter )
+        return 1;
+    // if none of both, or both are in the footer
+    // arrange them depending on the position
+    else
+        return aPosAnchorA < aPosAnchorB;
 }
 
 SwPostItMgr::SwPostItMgr(SwView* pView)