fdo#81356: convert Fraction to boost::rational<long> - wip

* Added rational util functions used by Fraction class not
available in the boost::rational class.
* Replaced usage of Fraction by boost::rational<long>
* Removed code that relies on:
1. fraction.IsValid() -- rational only allow valid values, ie
denominator() != 0
2. rational.denominator() == 0 -- always false
3. rational.denominator() < 0 -- always false but implementation
detail: http://www.boost.org/doc/libs/release/libs/rational/rational.html#Internal%20representation
* Simplified code that relies on:
1. rational.denominator() != 0 -- always true
* BUGS EXIST because Fraction allows the creation of invalid values but
boost::rational throws the exception boost::bad_rational

Change-Id: I84970a4956afb3f91ac0c8f726547466319420f9
Reviewed-on: https://gerrit.libreoffice.org/11551
Reviewed-by: David Tardon <dtardon@redhat.com>
Tested-by: David Tardon <dtardon@redhat.com>

1 files changed, 3 insertions, 3 deletions

diff --git a/include/svtools/ruler.hxx b/include/svtools/ruler.hxx
index 49d4e424da4b..a27a92175a5f 100644
--- a/include/svtools/ruler.hxx
+++ b/include/svtools/ruler.hxx
@@ -644,7 +644,7 @@ private:
     RulerType       meDragType;
     MapUnit         meSourceUnit;
     FieldUnit       meUnit;
-    Fraction        maZoom;
+    boost::rational<long>        maZoom;
     bool            mbCalc;
     bool            mbFormat;
     bool            mbDrag;
@@ -745,8 +745,8 @@ public:
 
     void            SetUnit( FieldUnit eNewUnit );
     FieldUnit       GetUnit() const { return meUnit; }
-    void            SetZoom( const Fraction& rNewZoom );
-    Fraction        GetZoom() const { return maZoom; }
+    void            SetZoom( const boost::rational<long>& rNewZoom );
+    boost::rational<long>        GetZoom() const { return maZoom; }
 
     void            SetSourceUnit( MapUnit eNewUnit ) { meSourceUnit = eNewUnit; }
     MapUnit         GetSourceUnit() const { return meSourceUnit; }