Added test binary, code to read base16 themes

shard.yml

@@ -6,11 +6,13 @@ authors:
 
 targets:
   tartrazine:
-    main: src/tartrazine.cr
+    main: src/main.cr
 
 dependencies:
   base58:
     github: crystal-china/base58.cr
+  sixteen:
+    github: ralsina/sixteen
 
 crystal: ">= 1.13.0"
 

src/formatter.cr

@@ -66,7 +66,3 @@ module Tartrazine
     end
   end
 end
-
-lexer = Tartrazine.lexer("crystal")
-theme = Tartrazine.theme("catppuccin-macchiato")
-puts Tartrazine::Html.new.format(File.read(ARGV[0]), lexer, theme)

src/main.cr

@@ -0,0 +1,5 @@
+require "./**" 
+
+lexer = Tartrazine.lexer("crystal")
+theme = Tartrazine.theme("catppuccin-macchiato")
+puts Tartrazine::Html.new.format(File.read(ARGV[0]), lexer, theme)

src/styles.cr

@@ -1,3 +1,4 @@
+require "sixteen"
 require "xml"
 
 module Tartrazine
@@ -78,6 +79,41 @@ module Tartrazine
       parents
     end
 
+    # Load from a base16 theme name using Sixteen
+    def self.from_base16(name : String) : Theme
+      t = Sixteen.theme(name)
+      # The color assignments are adapted from
+      # https://github.com/mohd-akram/base16-pygments/
+
+      t.styles["Background"] = Style.new(color: t["base05"], background: t["base00"])
+      t.styles["Text"] = Style.new(color: t["base05"])
+      t.styles["Error"] = Style.new(color: t["base08"])
+      t.styles["Comment"] = Style.new(color: t["base03"])
+      t.styles["CommentPreProc"] = Style.new(color: t["base0f"])
+      t.styles["CommentPreProcFile"] = Style.new(color: t["base0b"])
+      t.styles["Keyword"] = Style.new(color: t["base0e"])
+      t.styles["KeywordType"] = Style.new(color: t["base08"])
+      t.styles["NameAttribute"] = Style.new(color: t["base0d"])
+      t.styles["NameBuiltin"] = Style.new(color: t["base08"])
+      t.styles["NameBuiltinPseudo"] = Style.new(color: t["base08"])
+      t.styles["NameClass"] = Style.new(color: t["base0d"])
+      t.styles["NameConstant"] = Style.new(color: t["base09"])
+      t.styles["NameDecorator"] = Style.new(color: t["base09"])
+      t.styles["NameFunction"] = Style.new(color: t["base0d"])
+      t.styles["NameNamespace"] = Style.new(color: t["base0d"])
+      t.styles["NameTag"] = Style.new(color: t["base0e"])
+      t.styles["NameVariable"] = Style.new(color: t["base0d"])
+      t.styles["NameVariableInstance"] = Style.new(color: t["base08"])
+      t.styles["Number"] = Style.new(color: t["base09"])
+      t.styles["Operator"] = Style.new(color: t["base0c"])
+      t.styles["OperatorWord"] = Style.new(color: t["base0e"])
+      t.styles["Literal"] = Style.new(color: t["base0b"])
+      t.styles["String"] = Style.new(color: t["base0b"])
+      t.styles["StringInterpol"] = Style.new(color: t["base0f"])
+      t.styles["StringRegex"] = Style.new(color: t["base0c"])
+      t.styles["StringSymbol"] = Style.new(color: t["base09"])
+    end
+
     # Load from a Chroma XML file
     def self.from_xml(xml : String) : Theme
       document = XML.parse(xml)