[gtksourceview/gtksourceview-4-8] solarized-dark.xml: backport style improvements

[Christian Hergert <chergert src gnome org>]

commit 6cb31a7ddfa1f65b8cbf24935a66b5f43b327afa
Author: Christian Hergert <chergert redhat com>
Date:   Fri Jan 14 12:45:07 2022 -0800

    solarized-dark.xml: backport style improvements
    
    This contains a number of improvements and compatability fixes compared
    to solarized upstream. Additionally some GTK-DOC style improvements.

 data/styles/solarized-dark.xml | 24 +++++++++++++++++++++++-
 1 file changed, 23 insertions(+), 1 deletion(-)
---
diff --git a/data/styles/solarized-dark.xml b/data/styles/solarized-dark.xml
index 16cf7c7f..e3b484ce 100644
--- a/data/styles/solarized-dark.xml
+++ b/data/styles/solarized-dark.xml
@@ -70,11 +70,17 @@
 
   <!-- Constants -->
   <style name="def:constant"                foreground="cyan"/>
-  <style name="def:special-char"            foreground="green"/>
+  <style name="def:special-char"            foreground="red"/>
 
   <!-- Identifiers -->
   <style name="def:identifier"              foreground="blue"/>
 
+  <!-- Functions -->
+  <style name="def:function"                foreground="blue"/>
+
+  <!-- Keywords -->
+  <style name="def:keyword"                 foreground="green"/>
+
   <!-- Statements -->
   <style name="def:statement"               foreground="orange"/>
 
@@ -114,4 +120,20 @@
   <style name="def:heading5"                scale="1.3"/>
   <style name="def:heading6"                scale="1.2"/>
   -->
+
+  <!-- C Overrides -->
+  <style name="c:preprocessor"              foreground="orange"/>
+  <style name="c:type-keyword"              foreground="yellow"/>
+
+  <!-- GTK-DOC Overrides -->
+  <style name="gtk-doc:type"                foreground="yellow"/>
+  <style name="gtk-doc:function"            foreground="blue"/>
+  <style name="gtk-doc:function-name"       bold="true"/>
+  <style name="gtk-doc:property-name"       bold="true"/>
+  <style name="gtk-doc:signal-name"         bold="true"/>
+  <style name="gtk-doc:parameter"           bold="true"/>
+  <style name="gtk-doc:constant"            foreground="cyan"/>
+  <style name="gtk-doc:return"              bold="true"/>
+  <style name="gtk-doc:since"               bold="true"/>
+  <style name="gtk-doc:deprecated"          bold="true"/>
 </style-scheme>