faster mapping from nodes to SwFrmFmt's anchored at them

The SwFrmFmtAnchorMap class provides reverse mapping
to SwFrmFmt::GetAnchor().GetCntntAnchor(), so that when code somewhere needs
to update SwFrmFmt's anchored at a position, it's not necessary to iterate
over all of them (which can be a large number e.g. with mail merge).

One special catch with the multimap of SwNodeIndex keys is that
the values of those keys change (whenever the node structure of the document
changes, indexes of nodes change as a result). This makes it impossible to use
any hashing container, as the hashes would change without the container
noticing, but multimap should work fine, as it just requires that the keys
remain sorted, and that is the case. Nevertheless, the old code in the two
converted places is intentionally left there in debug mode to verify the reverse
mapping is updated correctly.

I intentionally went with SwNodeIndex rather than SwPosition, as SwIndex
(the other component of SwPosition) was causing some trouble (see e.g. the
SwPosition comparison operator< , where two same positions are different if one
is registered and the other not) and it doesn't appear to be actually necessary.

Conflicts:
sw/inc/doc.hxx
sw/inc/frmfmt.hxx
sw/source/core/attr/swatrset.cxx
sw/source/core/doc/docnew.cxx
sw/source/core/inc/frmtool.hxx
sw/source/core/layout/atrfrm.cxx
sw/source/core/txtnode/ndtxt.cxx

Change-Id: I7f1768558f60155d4ba83c84aa7f9e34dc65ebf9

1 files changed, 5 insertions, 0 deletions

diff --git a/sw/inc/doc.hxx b/sw/inc/doc.hxx
index c7d7af8de5ef..fc258ef8ac21 100644
--- a/sw/inc/doc.hxx
+++ b/sw/inc/doc.hxx
@@ -128,6 +128,7 @@ class SwFmt;
 class SwFmtINetFmt;
 class SwFmtRefMark;
 class SwFrmFmt;
+class SwFrmFmtAnchorMap;
 class SwFrmFmts;
 class SwFtnIdxs;
 class SwFtnInfo;
@@ -297,6 +298,7 @@ class SW_DLLPUBLIC SwDoc :
     SwGrfFmtColl    *mpDfltGrfFmtColl;
 
     SwFrmFmts       *mpFrmFmtTbl;        ///< Format table
+    SwFrmFmtAnchorMap *mpFrmFmtAnchorMap;
     SwCharFmts      *mpCharFmtTbl;
     SwFrmFmts       *mpSpzFrmFmtTbl;
     SwSectionFmts   *mpSectionFmtTbl;
@@ -1214,6 +1216,9 @@ public:
     const SwCharFmt *GetDfltCharFmt() const { return mpDfltCharFmt;}
           SwCharFmt *GetDfltCharFmt()       { return mpDfltCharFmt;}
 
+    const SwFrmFmtAnchorMap* GetFrmFmtAnchorMap() const { return mpFrmFmtAnchorMap; }
+    SwFrmFmtAnchorMap* GetFrmFmtAnchorMap() { return mpFrmFmtAnchorMap; }
+
     /// @return the interface of the management of (auto)styles
     IStyleAccess& GetIStyleAccess() { return *mpStyleAccess; }