add delete bond functionality to editors

modules/mol/base/pymod/export_editors.cc

@@ -243,6 +243,8 @@ void export_Editors()
     .def("DeleteResidue", &EditorBase::DeleteResidue)
     .def("DeleteChain", &EditorBase::DeleteChain)
     .def("DeleteAtom", &EditorBase::DeleteAtom)
+    .def("DeleteBond", &EditorBase::DeleteBond)
+    .def("DeleteBonds", &EditorBase::DeleteBonds)
     .def("InsertResidueBefore", &EditorBase::InsertResidueBefore)
     .def("InsertResidueAfter", &EditorBase::InsertResidueAfter)
     .def("AppendResidue", append_a)

modules/mol/base/src/editor_base.cc

@@ -193,6 +193,19 @@ void EditorBase::DeleteAtom(const AtomHandle& atom_handle)
   atom_handle.GetResidue().Impl()->DeleteAtom(atom_handle.Impl());
 }
 
+void EditorBase::DeleteBond(const BondHandle& bond)
+{
+  bond.GetFirst().Impl()->DeleteConnector(bond.Impl(),true);
+}
+
+void EditorBase::DeleteBonds(const BondHandleList& bond_list)
+{
+  for(BondHandleList::const_iterator i = bond_list.begin();
+      i != bond_list.end(); ++i){
+    i->GetFirst().Impl()->DeleteConnector(i->Impl(),true);
+  }
+}
+
 void EditorBase::DeleteResidue(const ResidueHandle& residue_handle) 
 {
   CheckHandleValidity(residue_handle);

modules/mol/base/src/editor_base.hh

@@ -248,6 +248,20 @@ public:
   ///
   /// All associated torsions and bonds will be removed as well
   void DeleteAtoms(const AtomHandleList& atoms);
+
+  /// \ brief Delete bond
+  ///
+  /// \param bond
+  ///         Is the bond to remove. If no such bond exists, this method will
+  ///         have no effect
+  void DeleteBond(const BondHandle& bond);
+
+  /// \ brief Delete a set of bond
+  ///
+  /// \param bonds
+  ///         bonds to remove. If no such bonds exist, this method will
+  ///         have no effect
+  void DeleteBonds(const BondHandleList& bonds);
   
   /// \brief Add named torsion to entity
   TorsionHandle AddTorsion(const String& name, const AtomHandle& a1,