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/* NSC -- new Scala compiler
* Copyright 2005-2013 LAMP/EPFL
* @author Paul Phillips
*/
package scala.tools.nsc.interpreter.jline
import java.util.{Iterator => JIterator, ListIterator => JListIterator}
import _root_.jline.{console => jconsole}
import jconsole.history.History.{Entry => JEntry}
import jconsole.history.{History => JHistory}
import scala.tools.nsc.interpreter
import scala.tools.nsc.interpreter.session.{History, SimpleHistory}
/** A straight scalafication of the jline interface which mixes
* in the sparse jline-independent one too.
*/
trait JLineHistory extends JHistory with History {
def size: Int
def isEmpty: Boolean
def index: Int
def clear(): Unit
def get(index: Int): CharSequence
def add(line: CharSequence): Unit
def replace(item: CharSequence): Unit
def entries(index: Int): JListIterator[JEntry]
def entries(): JListIterator[JEntry]
def iterator: JIterator[JEntry]
def current(): CharSequence
def previous(): Boolean
def next(): Boolean
def moveToFirst(): Boolean
def moveToLast(): Boolean
def moveTo(index: Int): Boolean
def moveToEnd(): Unit
override def historicize(text: String): Boolean = {
text.lines foreach add
moveToEnd()
true
}
}
object JLineHistory {
class JLineFileHistory extends SimpleHistory with FileBackedHistory {
override def add(item: CharSequence): Unit = {
if (!isEmpty && last == item)
interpreter.repldbg("Ignoring duplicate entry '" + item + "'")
else {
super.add(item)
addLineToFile(item)
}
}
override def toString = "History(size = " + size + ", index = " + index + ")"
import scala.collection.JavaConverters._
override def asStrings(from: Int, to: Int): List[String] =
entries(from).asScala.take(to - from).map(_.value.toString).toList
case class Entry(index: Int, value: CharSequence) extends JEntry {
override def toString = value.toString
}
private def toEntries(): Seq[JEntry] = buf.zipWithIndex map { case (x, i) => Entry(i, x)}
def entries(idx: Int): JListIterator[JEntry] = toEntries().asJava.listIterator(idx)
def entries(): JListIterator[JEntry] = toEntries().asJava.listIterator()
def iterator: JIterator[JEntry] = toEntries().iterator.asJava
}
def apply(): History = try new JLineFileHistory catch { case x: Exception => new SimpleHistory() }
}
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