[gnumeric] Fix snap to grid for one cell or basolute anchored objects. [#754792]

[Jean Bréfort <jbrefort src gnome org>]

commit 43e0ea8d05f2874e20fb205744304f215cef862c
Author: Jean Brefort <jean brefort normalesup org>
Date:   Fri Sep 11 19:42:49 2015 +0200

    Fix snap to grid for one cell or basolute anchored objects. [#754792]

 ChangeLog          |    5 +++++
 NEWS               |    1 +
 src/sheet-object.c |    8 ++++++++
 3 files changed, 14 insertions(+), 0 deletions(-)
---
diff --git a/ChangeLog b/ChangeLog
index f47a2e9..116614f 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,3 +1,8 @@
+2015-09-11  Jean Brefort  <jean brefort normalesup org>
+
+       * src/sheet-object.c (cb_so_snap_to_grid): fixed for one cell and absolute
+       anchors. [#754792]
+
 2015-08-24  Jean Brefort  <jean brefort normalesup org>
 
        * src/sheet-object.c (sheet_object_update_bounds),
diff --git a/NEWS b/NEWS
index 2585838..311452c 100644
--- a/NEWS
+++ b/NEWS
@@ -2,6 +2,7 @@ Gnumeric 1.12.24
 
 Jean:
        * Fix printing of sheet objects with one cell or absolute anchors. [#753961]
+       * Fix snap to grid for one cell or basolute anchored objects. [#754792]
 
 --------------------------------------------------------------------------
 Gnumeric 1.12.23
diff --git a/src/sheet-object.c b/src/sheet-object.c
index eae7dd8..d997880 100644
--- a/src/sheet-object.c
+++ b/src/sheet-object.c
@@ -135,8 +135,16 @@ cb_so_snap_to_grid (SheetObject *so, SheetControl *sc)
 {
        SheetObjectAnchor *snapped =
                sheet_object_anchor_dup (sheet_object_get_anchor (so));
+       GnmSOAnchorMode mode = snapped->mode;
+       snapped->mode = GNM_SO_ANCHOR_TWO_CELLS;
        snapped->offset[0] = snapped->offset[1] = 0.;
        snapped->offset[2] = snapped->offset[3] = 1.;
+       if (mode != GNM_SO_ANCHOR_TWO_CELLS) {
+               double pts[4];
+               sheet_object_anchor_to_pts (snapped, so->sheet, pts);
+               snapped->mode = mode;
+               sheet_object_pts_to_anchor (snapped, so->sheet, pts);
+       }
        cmd_objects_move (sc_wbc (sc),
                g_slist_prepend (NULL, so),
                g_slist_prepend (NULL, snapped),