Add coloring util

Author: felixmulder

src/dotty/tools/dotc/printing/Highlighting.scala

@@ -0,0 +1,60 @@
+package dotty.tools
+package dotc
+package printing
+
+import scala.collection.mutable
+
+object Highlighting {
+
+  implicit def colorToString(c: Color): String = c.toString
+  implicit def cbufToString(cb: ColorBuffer): String = cb.toString
+
+  abstract class Color(private val color: String) {
+    def text: String
+
+    override def toString = color + text + Console.RESET
+
+    def +(other: Color): ColorBuffer =
+      new ColorBuffer(this) + other
+
+    def +(other: String): ColorBuffer =
+      new ColorBuffer(this) + other
+  }
+
+  case class ColorBuffer(color: Color) {
+    val buffer = new mutable.ListBuffer[String]
+
+    buffer += color.toString
+
+    def +(color: Color): ColorBuffer = {
+      buffer += color.toString
+      this
+    }
+
+    def +(str: String): ColorBuffer = {
+      buffer += str
+      this
+    }
+
+    override def toString =
+      buffer.mkString
+  }
+
+  case class Red(text: String) extends Color(Console.RED)
+  case class Blue(text: String) extends Color(Console.BLUE)
+  case class Cyan(text: String) extends Color(Console.CYAN)
+  case class Black(text: String) extends Color(Console.BLACK)
+  case class Green(text: String) extends Color(Console.GREEN)
+  case class White(text: String) extends Color(Console.WHITE)
+  case class Yellow(text: String) extends Color(Console.YELLOW)
+  case class Magenta(text: String) extends Color(Console.MAGENTA)
+
+  case class RedB(text: String) extends Color(Console.RED_B)
+  case class BlueB(text: String) extends Color(Console.BLUE_B)
+  case class CyanB(text: String) extends Color(Console.CYAN_B)
+  case class BlackB(text: String) extends Color(Console.BLACK_B)
+  case class GreenB(text: String) extends Color(Console.GREEN_B)
+  case class WhiteB(text: String) extends Color(Console.WHITE_B)
+  case class YellowB(text: String) extends Color(Console.YELLOW_B)
+  case class MagentaB(text: String) extends Color(Console.MAGENTA_B)
+}