From 9ddd20f69d3631a2fb400d3e1e8c2d3d3fbbc161 Mon Sep 17 00:00:00 2001
From: "Henry So, Jr." <henryso@panix.com>
Date: Sat, 5 Mar 2016 15:44:32 -0500
Subject: [PATCH] Used tex_write_text for printing nabc to fix character
 handling. Fixes #1015.

---
 CHANGELOG.md                        |  1 +
 src/gregoriotex/gregoriotex-write.c | 34 +++++++++++++++++++----------
 tex/gregoriotex-nabc.lua            |  7 ++++++
 tex/gregoriotex-nabc.tex            | 22 +++++++++----------
 4 files changed, 41 insertions(+), 23 deletions(-)

diff --git a/CHANGELOG.md b/CHANGELOG.md
index ff37615e6..cbd11ec53 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -8,6 +8,7 @@ As of v3.0.0 this project adheres to [Semantic Versioning](http://semver.org/).
 - Corrected the end-of-line shift for a ragged line break before `<eu>` blocks (see [#988](https://github.com/gregorio-project/gregorio/issues/988)).
 - Additional space is now added on top of lines with very high notes or signs (see [#883](https://github.com/gregorio-project/gregorio/issues/883)).
 - High notes are now taken into account for vertical placement of above lines test (see [#960](https://github.com/gregorio-project/gregorio/issues/960)).
+- Deminutus figures in nabc work again (see [#1015](https://github.com/gregorio-project/gregorio/issues/1015)).
 
 ### Added
 - The macro `\grechangecount` now allows to change some numeric values of the configuration. This version introduces two of them: `additionaltopspacethreshold` and `additionaltopspacealtthreshold`, see GregorioRef for details.
diff --git a/src/gregoriotex/gregoriotex-write.c b/src/gregoriotex/gregoriotex-write.c
index adcc24c70..bfa34171c 100644
--- a/src/gregoriotex/gregoriotex-write.c
+++ b/src/gregoriotex/gregoriotex-write.c
@@ -2534,20 +2534,31 @@ static int gregoriotex_syllable_first_type(gregorio_syllable *syllable)
 static __inline void write_low_choral_sign(FILE *const f,
         const gregorio_note *const note, int special)
 {
-    fprintf(f, "\\GreLowChoralSign{%d}{%s%s%s}{%d}%%\n",
-            pitch_value(note->u.note.pitch),
-            note->choral_sign_is_nabc? "\\GreNABCChar{" : "",
-            note->choral_sign, note->choral_sign_is_nabc? "}" : "", special);
+    if (note->choral_sign_is_nabc) {
+        fprintf(f, "\\GreLowChoralSign{%d}{\\GreNABCChar{",
+                pitch_value(note->u.note.pitch));
+        tex_escape_text(f, note->choral_sign);
+        fprintf(f, "}}{%d}%%\n", special);
+    } else {
+        fprintf(f, "\\GreLowChoralSign{%d}{%s}{%d}%%\n",
+                pitch_value(note->u.note.pitch), note->choral_sign,
+                special);
+    }
 }
 
 static __inline void write_high_choral_sign(FILE *const f,
         const gregorio_note *const note, int pitch_offset)
 {
-    fprintf(f, "\\GreHighChoralSign{%d}{%s%s%s}{\\GreOCase%s}%%\n",
-            pitch_value(note->u.note.pitch + pitch_offset),
-            note->choral_sign_is_nabc? "\\GreNABCChar{" : "",
-            note->choral_sign, note->choral_sign_is_nabc? "}" : "",
-            note->gtex_offset_case);
+    if (note->choral_sign_is_nabc) {
+        fprintf(f, "\\GreHighChoralSign{%d}{\\GreNABCChar{",
+                pitch_value(note->u.note.pitch + pitch_offset));
+        tex_escape_text(f, note->choral_sign);
+        fprintf(f, "}}{\\GreOCase%s}%%\n", note->gtex_offset_case);
+    } else {
+        fprintf(f, "\\GreHighChoralSign{%d}{%s}{\\GreOCase%s}%%\n",
+                pitch_value(note->u.note.pitch + pitch_offset),
+                note->choral_sign, note->gtex_offset_case);
+    }
 }
 
 static void gregoriotex_write_choral_sign(FILE *f, gregorio_glyph *glyph,
@@ -3593,8 +3604,9 @@ static void write_syllable(FILE *f, gregorio_syllable *syllable,
                 size_t i;
                 for (i = 0; i < element->nabc_lines; i++) {
                     if (element->nabc[i]) {
-                        fprintf(f, "\\GreNABCNeumes{%d}{%s}%%\n", (int)(i+1),
-                                element->nabc[i]);
+                        fprintf(f, "\\GreNABCNeumes{%d}{", (int)(i+1));
+                        tex_escape_text(f, element->nabc[i]);
+                        fprintf(f, "}%%\n");
                     }
                 }
             }
diff --git a/tex/gregoriotex-nabc.lua b/tex/gregoriotex-nabc.lua
index c98be962e..c8865b6bb 100644
--- a/tex/gregoriotex-nabc.lua
+++ b/tex/gregoriotex-nabc.lua
@@ -22,6 +22,8 @@
 
 -- GREGORIO_VERSION 4.1.0
 
+local catcode_at_letter = luatexbase.catcodetables['gre@atletter']
+
 local gregallaliases = {
   ["ci~"] = "cl>",
   ["pe~"] = "ta>",
@@ -413,6 +415,11 @@ local function init_font(fontname)
   end
 end
 
+local function print_nabc(nabc)
+  tex.sprint(catcode_at_letter, nabc)
+end
+
 gregoriotex.parse_nabc = gregallparse_neumes
+gregoriotex.print_nabc = print_nabc
 gregoriotex.init_nabc_font = init_font
 gregoriotex.nabc_font_tables = gregalltab
diff --git a/tex/gregoriotex-nabc.tex b/tex/gregoriotex-nabc.tex
index b516a27db..090e31557 100644
--- a/tex/gregoriotex-nabc.tex
+++ b/tex/gregoriotex-nabc.tex
@@ -37,20 +37,18 @@
   \gre@nabcfontloadedtrue%
 }
 
-\newcommand{\grenabccharno}[3]{{\directlua{
-  tex.sprint(gregoriotex.parse_nabc("\luatexluaescapestring{#1}", "\luatexluaescapestring{#2}", \luatexluaescapestring{#3}))
+\def\grenabccharno#1#2#3{{\directlua{
+  gregoriotex.print_nabc(gregoriotex.parse_nabc("#1", "\luatexluaescapestring{#2}", #3))
 }}}
 
-\def\GreNABCChar#1{%
-  \begingroup %
-    \catcode`\~=12{}%
-    \catcode`\@=11{}%
-    \gre@font@nabc %
-    \gre@style@nabc %
-    \grenabccharno{#1}{\gre@nabcfontname}{1}%
-    \endgre@style@nabc%
-  \endgroup %
-}
+\def\GreNABCChar#1{{%
+  %\catcode`\~=12{}%
+  %\catcode`\@=11{}%
+  \gre@font@nabc %
+  \gre@style@nabc %
+  \grenabccharno{#1}{\gre@nabcfontname}{1}%
+  \endgre@style@nabc%
+}}
 
 \def\GreNABCNeumes#1#2{%
   \GreSetTextAboveLines{\GreNABCChar{#2}}%