From 1c830519a1d93bbc7d81a87c98e0f6e587d8d12c Mon Sep 17 00:00:00 2001
From: Clemens Niederberger <contact@mychemistry.eu>
Date: Sat, 7 Mar 2020 13:50:23 +0100
Subject: [PATCH] resolve issue #31

---
 README                                 |  2 +-
 chemmacros.history                     |  5 ++---
 chemmacros.module.chemformula.code.tex |  8 +++-----
 chemmacros.module.redox.code.tex       | 27 ++++++++++++++++++++++++--
 chemmacros.sty                         |  2 +-
 5 files changed, 32 insertions(+), 12 deletions(-)

diff --git a/README b/README
index 9b1d826..a3e932f 100644
--- a/README
+++ b/README
@@ -1,5 +1,5 @@
 --------------------------------------------------------------------------
-the CHEMMACROS package v5.11 2020/02/29
+the CHEMMACROS package v5.11 2020/03/07
 
   comprehensive support for typesetting chemistry documents
 
diff --git a/chemmacros.history b/chemmacros.history
index d52ce4d..2104a10 100644
--- a/chemmacros.history
+++ b/chemmacros.history
@@ -390,7 +390,6 @@ Version history
                           - prefer lazy boolean evaluation
                           - prefer the kernel commands to
                             \chemmacros_leave_vmode: and \chemmacros_tex_if:
-2020/02/29 - version 5.11 - use \ch even for simple formulas – resolves issue
-                            #28 (chemformula)
-			  - let \chemmacros_iupac:nn think we're in the
+2020/03/07 - version 5.11 - let \chemmacros_iupac:nn think we're in the
                             document – fixes issue #30 (nomenclature)
+			  - add option redox/format
diff --git a/chemmacros.module.chemformula.code.tex b/chemmacros.module.chemformula.code.tex
index 0445aa0..c2fb135 100644
--- a/chemmacros.module.chemformula.code.tex
+++ b/chemmacros.module.chemformula.code.tex
@@ -131,11 +131,7 @@
   {
     \chemmacros_integrate_package:nnn {} {chemformula} {2015/09/08}
     \cs_set_protected:Npn \chemmacros_chemformula:n #1
-      {
-        \chemmacros_if_compatibility:nnTF {>} {5.10}
-          { \chemformula_ch:nn {} {#1} }
-          { \chemformula_chcpd:nn {} {#1} }
-      }
+      { \chemformula_chcpd:nn {} {#1} }
     \cs_set_protected:Npn \chemmacros_reaction:n #1
       { \chemformula_ch:nn {} {#1} }
   }
@@ -243,3 +239,5 @@
 2016/05/03 - correct wrong method check
 2020/02/02 - lazy boolean evaluation
 2020/02/29 - use \ch even for simple formulas – resolves issue #28
+2020/03/02 - undo last change: this makes problems with oxidation numbers in a
+             reaction
diff --git a/chemmacros.module.redox.code.tex b/chemmacros.module.redox.code.tex
index 2c0421b..f3f8b29 100644
--- a/chemmacros.module.redox.code.tex
+++ b/chemmacros.module.redox.code.tex
@@ -52,9 +52,20 @@
 \bool_new:N \l__chemmacros_ox_top_bool
 \bool_new:N \l__chemmacros_ox_align_center_bool
 
+\ChemCompatibilityFrom{5.11}
+\tl_new:N \l__chemmacros_ox_format_tl
+\EndChemCompatibility
+
 \int_new:N \l__chemmacros_ox_number_int
 \fp_new:N  \l__chemmacros_ox_number_fp
 
+\cs_new_protected:Npn \__chemmacros_ox_format:n #1
+  {
+    \chemmacros_if_compatibility:nnTF {>=} {5.11}
+    { { \l__chemmacros_ox_format_tl {#1} } }
+    { \use:n {#1} }
+  }
+
 \cs_new_protected:Npn \__chemmacros_ox_process_number:n #1
   {
     \bool_if:NTF \l__chemmacros_ox_parse_bool
@@ -180,7 +191,10 @@
     \hbox_set:Nn \l__chemmacros_tmpa_box
       {
         \chemmacros_text:n
-          { \relsize {-3} \__chemmacros_ox_process_number:n {#1} }
+          {
+            \__chemmacros_ox_format:n
+              { \relsize {-3} \__chemmacros_ox_process_number:n {#1} }
+          }
       }
     \hbox_set:Nn \l__chemmacros_tmpb_box { \chemmacros_chemformula:n {#2} }
     \chemmacros_math:n
@@ -196,7 +210,10 @@
               {
                 \box_use:N \l__chemmacros_tmpb_box
                 \tl_use:N \l__chemmacros_ox_side_connect_tl
-                ( \__chemmacros_ox_process_number:n {#1} )
+                (
+                  \__chemmacros_ox_format:n
+                    { \__chemmacros_ox_process_number:n {#1} }
+                )
               }
           }
         \bool_if:NT \l__chemmacros_ox_top_bool
@@ -285,6 +302,11 @@
   }
 \EndChemCompatibility
 
+\ChemCompatibilityFrom{5.11}
+\chemmacros_define_keys:nn {redox}
+  { format .tl_set:N = \l__chemmacros_ox_format_tl }
+\EndChemCompatibility
+
 % \ox[<keyval>]{<num>,<atom>}
 % \ox*[<keyval>]{<num>,<atom>} => always number on the top
 \cs_new_protected:Npn \chemmacros_ox:nnnn #1#2#3#4
@@ -433,3 +455,4 @@
 2015/09/30 - new option `explicit-zero-sign'
 2020/02/02 - lazy boolean evaluation
            - prefer \legacy_if:nTF over \chemmacros_if_tex:nnTF
+2020/03/02 - add option redox/format
diff --git a/chemmacros.sty b/chemmacros.sty
index 43458f8..f994ff6 100644
--- a/chemmacros.sty
+++ b/chemmacros.sty
@@ -31,7 +31,7 @@
 
 % --------------------------------------------------------------------------
 % package information:
-\tl_const:Nn \c_chemmacros_date_tl {2020/02/29}
+\tl_const:Nn \c_chemmacros_date_tl {2020/03/07}
 \tl_const:Nn \c_chemmacros_version_major_number_tl {5}
 \tl_const:Nn \c_chemmacros_version_minor_number_tl {11}
 \tl_const:Nn \c_chemmacros_version_subrelease_tl   {}