[gtksourceview: 1/2] star.lang: add STAR file format for scientific domains

[Christian Hergert <chergert src gnome org>]

commit 9bac286ff1cf8be72d2eb4f5d11f1b2e398e758e
Author: Michael Gryk <gryk uchc edu>
Date:   Thu Mar 11 21:47:45 2021 +0000

    star.lang: add STAR file format for scientific domains

 data/language-specs/star.lang      | 96 ++++++++++++++++++++++++++++++++++++++
 tests/syntax-highlighting/file.str | 23 +++++++++
 2 files changed, 119 insertions(+)
---
diff --git a/data/language-specs/star.lang b/data/language-specs/star.lang
new file mode 100644
index 00000000..90186f17
--- /dev/null
+++ b/data/language-specs/star.lang
@@ -0,0 +1,96 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<!--
+
+ This file is part of GtkSourceView
+
+ Author: Michael R. Gryk <gryk uchc edu>
+ Copyright (c) 2020-2021 Michael R. Gryk <gryk uchc edu>
+
+ GtkSourceView is free software; you can redistribute it and/or
+ modify it under the terms of the GNU Lesser General Public
+ License as published by the Free Software Foundation; either
+ version 2.1 of the License, or (at your option) any later version.
+
+ GtkSourceView is distributed in the hope that it will be useful,
+ but WITHOUT ANY WARRANTY; without even the implied warranty of
+ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ Lesser General Public License for more details.
+
+ You should have received a copy of the GNU Lesser General Public License
+ along with this library; if not, see <http://www.gnu.org/licenses/>.
+
+ STAR is the file format used by the Protein Data Bank (mmCIF) and BioMagResBank (NMR-STAR) among others
+ For more information, see:
+    Hall, S.R. The STAR File: A New Format for Electronic Data Transfer and Archiving. J. Chem. Inf. Comput. 
31, 326-333 (1991).
+    Hall, S.R. & Spadaccini, N. The STAR File: Detailed Specifications. J. Chem. Inf. Comput. 34, 505-508 
(1994).
+
+ -->
+<language id="star" name="STAR" version="2.0" _section="Scientific">
+  <metadata>
+    <property name="globs">*.str;*.cif;*.mif</property>
+    <property name="line-comment-start">#</property>
+  </metadata>
+
+  <styles>
+    <style id="comment"            _name="Comment"                   map-to="def:comment"/>
+    <style id="data-name"          _name="Data Name (key)"           map-to="def:identifier"/>
+    <style id="keyword"            _name="Keyword"                   map-to="def:keyword"/>
+    <style id="framecode"          _name="Frame Code"                map-to="def:type"/>
+    <style id="string"             _name="String (value)"            map-to="def:string"/>
+    <style id="data-value"         _name="Data Value" />
+  </styles>
+
+  <default-regex-options case-sensitive="false"/>
+
+  <definitions>
+    <define-regex id="starChars">[!-~]+</define-regex>
+
+    <context id="comment" end-at-line-end="true" style-ref="comment" class="comment">
+      <start>#</start>
+    </context>
+    <context id="data-value" class="no-spell-check">
+      <match>\%{starChars}</match>
+    </context>
+    <context id="data-name" style-ref="data-name" class="no-spell-check">
+      <match>_\%{starChars}</match>
+    </context>
+    <context id="framecode" style-ref="framecode" class="no-spell-check">
+      <match>\$\%{starChars}</match>
+    </context>
+    <context id="quote-string" style-ref="string" end-at-line-end="true" class="string">
+      <start>"</start>
+      <end>"\s</end>
+    </context>
+    <context id="apos-string" style-ref="string" end-at-line-end="true" class="string">
+      <start>'</start>
+      <end>'\s</end>
+    </context>
+    <context id="semi-string" style-ref="string" end-at-line-end="false" class="string">
+      <start>^;</start>
+      <end>^;</end>
+    </context>
+
+    <context id="keywords" style-ref="keyword">
+      <keyword>data_\%{starChars}</keyword>
+      <keyword>save_\%{starChars}</keyword>
+      <keyword>save_</keyword>
+      <keyword>loop_</keyword>
+      <keyword>stop_</keyword>
+      <keyword>global_</keyword>
+    </context>
+
+    <context id="star">
+      <include>
+        <context ref="comment"/>
+        <context ref="data-name"/>
+        <context ref="keywords"/>
+        <context ref="framecode"/>
+        <context ref="semi-string"/>
+        <context ref="quote-string"/>
+        <context ref="apos-string"/>
+        <context ref="data-value"/>
+      </include>
+    </context>
+
+  </definitions>
+</language>
diff --git a/tests/syntax-highlighting/file.str b/tests/syntax-highlighting/file.str
new file mode 100644
index 00000000..1fcc4087
--- /dev/null
+++ b/tests/syntax-highlighting/file.str
@@ -0,0 +1,23 @@
+#File level comment
+data_blockname 
+  _key1  value1 #key-value pair
+  _key2
+  value2#notacomment
+
+  save_frame
+
+    loop_ # tabular data
+
+      _col1
+      _col2
+
+      value1   "valu"e2"  'O'Connor'   #string rules
+;
+multi-line strings need semi-colon delimiters
+;
+    stop_  # This is NMR-STAR syntax
+
+  save_
+
+global_
+  _key1 valueGlobal