[#52] Add zstyles to configure syntax-highlighting

modules/syntax-highlighting/README.md

@@ -38,6 +38,18 @@ To enable all highlighters, add the following to *zpreztorc*:
       'cursor' \
       'root'
 
+### Highlighting Styles
+
+Each syntax highlighter defines styles used to highlight tokens.
+
+To highlight, for example, builtins, commands, and functions in blue instead of
+green, add the following to *zpreztorc*:
+
+    zstyle ':prezto:module:syntax-highlighting' styles \
+      'builtin' 'bg=blue' \
+      'command' 'bg=blue' \
+      'function' 'bg=blue'
+
 Authors
 -------
 

modules/syntax-highlighting/init.zsh

@@ -13,9 +13,18 @@ fi
 # Source module files.
 source "${0:h}/external/zsh-syntax-highlighting.zsh"
 
-# Set the highlighters.
+# Set highlighters.
 zstyle -a ':prezto:module:syntax-highlighting' highlighters 'ZSH_HIGHLIGHT_HIGHLIGHTERS'
 if (( ${#ZSH_HIGHLIGHT_HIGHLIGHTERS[@]} == 0 )); then
   ZSH_HIGHLIGHT_HIGHLIGHTERS=(main)
 fi
 
+# Set highlighting styles.
+typeset -A syntax_highlighting_styles
+zstyle -a ':prezto:module:syntax-highlighting' styles 'syntax_highlighting_styles'
+for syntax_highlighting_style in "${(k)syntax_highlighting_styles[@]}"; do
+  ZSH_HIGHLIGHT_STYLES[$syntax_highlighting_style]=\
+    "$syntax_highlighting_styles[$syntax_highlighting_style]"
+done
+unset syntax_highlighting_style{s,}
+

runcoms/zpreztorc

@@ -110,6 +110,13 @@ zstyle ':prezto:module:prompt' theme 'sorin'
 #   'pattern' \
 #   'cursor' \
 #   'root'
+#
+# Set syntax highlighting styles.
+# zstyle ':prezto:module:syntax-highlighting' styles \
+#   'builtin' 'bg=blue' \
+#   'command' 'bg=blue' \
+#   'function' 'bg=blue'
+#
 
 #
 # Terminal