Move some code from s.t.n.io to s.t.n.interactive

The only usages of scala.tools.nsc.io.{Lexer,Pickler,PrettyWriter,
Replayer} can be found in scala.tools.nsc.interactive.

Let's move those files closer to their dependencies.

1 files changed, 41 insertions, 0 deletions

diff --git a/src/interactive/scala/tools/nsc/interactive/PrettyWriter.scala b/src/interactive/scala/tools/nsc/interactive/PrettyWriter.scala
new file mode 100644
index 0000000000..d7dadcc6a8
--- /dev/null
+++ b/src/interactive/scala/tools/nsc/interactive/PrettyWriter.scala
@@ -0,0 +1,41 @@
+package scala.tools.nsc.interactive
+
+import java.io.Writer
+
+class PrettyWriter(wr: Writer) extends Writer {
+  protected val indentStep = "  "
+  private var indent = 0
+  private def newLine() {
+    wr.write('\n')
+    wr.write(indentStep * indent)
+  }
+  def close() = wr.close()
+  def flush() = wr.flush()
+  def write(str: Array[Char], off: Int, len: Int): Unit = {
+    if (off < str.length && off < len) {
+      str(off) match {
+        case '{' | '[' | '(' =>
+          indent += 1
+          wr.write(str(off).toInt)
+          newLine()
+          wr.write(str, off + 1, len - 1)
+        case '}' | ']' | ')' =>
+          wr.write(str, off, len)
+          indent -= 1
+        case ',' =>
+          wr.write(',')
+          newLine()
+          wr.write(str, off + 1, len - 1)
+        case ':' =>
+          wr.write(':')
+          wr.write(' ')
+          wr.write(str, off + 1, len - 1)
+        case _ =>
+          wr.write(str, off, len)
+      }
+    } else {
+      wr.write(str, off, len)
+    }
+  }
+  override def toString = wr.toString
+}