Scala example source code file (Formatting.scala)

This example Scala source code file (Formatting.scala) is included in the DevDaily.com "Java Source Code Warehouse" project. The intent of this project is to help you "Learn Java by Example" ^TM.

Java - Scala tags/keywords

formatting, formatting, list, list, string, string

The Scala Formatting.scala source code

/* NSC -- new Scala compiler
 * Copyright 2005-2011 LAMP/EPFL
 * @author Paul Phillips
 */
 
package scala.tools.nsc
package interpreter

import util.stringFromWriter

trait Formatting {
  def prompt: String
  
  def spaces(code: String): String = {
    /** Heuristic to avoid indenting and thereby corrupting """-strings and XML literals. */
    val tokens = List("\"\"\"", "</", "/>")
    val noIndent = (code contains "\n") && (tokens exists code.contains)

    if (noIndent) ""
    else prompt drop 1 map (_ => ' ')
  }
  /** Indent some code by the width of the scala> prompt.
   *  This way, compiler error messages read better.
   */
  def indentCode(code: String) = {
    val indent = spaces(code)
    stringFromWriter(str =>
      for (line <- code.lines) {
        str print indent
        str print (line + "\n")
        str.flush()
      }
    )
  }
}