[gtksourceview/gtksourceview-4-2] sh.lang: improve recognition of "case ... esac" statement

[Christian Hergert <chergert src gnome org>]

commit 6b8f1e4e4c31da16ae2e160df5c3eaf64dcfcb99
Author: neyfag <trash paradise protonmail com>
Date:   Tue Sep 24 15:59:11 2019 +0000

    sh.lang: improve recognition of "case ... esac" statement

 data/language-specs/sh.lang       |  6 +++---
 tests/syntax-highlighting/file.sh | 12 ++++++++++++
 2 files changed, 15 insertions(+), 3 deletions(-)
---
diff --git a/data/language-specs/sh.lang b/data/language-specs/sh.lang
index b6a80538..86702525 100644
--- a/data/language-specs/sh.lang
+++ b/data/language-specs/sh.lang
@@ -481,10 +481,10 @@
       <include>
         <context sub-pattern="0" where="start" style-ref="keyword"/>
         <context sub-pattern="0" where="end" style-ref="keyword"/>
-        <context ref="double-quoted-string"/>
-        <context ref="single-quoted-string"/>
+        <context ref="variable-definition"/>
+        <define-regex id="slitem">([^)'"\s]|\\['"])+</define-regex>
         <context style-ref="others">
-          <match>[^\)\s]+\s*\)|;;</match>
+          <match>^\s*\%{slitem}?('[^)]+'|"[^)]+")?\%{slitem}?\s*\)|;;</match>
         </context>
         <context ref="sh"/>
       </include>
diff --git a/tests/syntax-highlighting/file.sh b/tests/syntax-highlighting/file.sh
index 10d63923..d48dd296 100644
--- a/tests/syntax-highlighting/file.sh
+++ b/tests/syntax-highlighting/file.sh
@@ -29,3 +29,15 @@ xxx${x#$HOME}xxx
 xxx${x##*/}xxx
 xxx${x#*}xxx
 xxx${x#"*"}xxx
+
+# Case statements
+case $item in
+[1-6]*)
+  ;;
+9[1-8])
+  ;;
+')')
+  ;;
+*)
+  ;;
+esac