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/* NSC -- new Scala compiler
* Copyright 2005-2011 LAMP/EPFL
* @author Paul Phillips
*/
package scala.tools.nsc
package interpreter
import java.util.{ List => JList }
/** An implementation-agnostic completion interface which makes no
* reference to the jline classes.
*/
trait Completion {
type ExecResult
trait Instance {
def complete(buffer: String, cursor: Int, candidates: JList[CharSequence]): Int
}
def resetVerbosity(): Unit
def execute(line: String): Option[ExecResult]
def completer(): Instance
}
object Completion {
object Empty extends Completion {
type ExecResult = Nothing
object NullCompleter extends Instance {
def complete(buffer: String, cursor: Int, candidates: JList[CharSequence]) = -1
}
def resetVerbosity() = ()
def execute(line: String) = None
def completer() = NullCompleter
}
def looksLikeInvocation(code: String) = (
(code != null)
&& (code startsWith ".")
&& !(code == ".")
&& !(code startsWith "./")
&& !(code startsWith "..")
)
def looksLikePath(code: String) = (code != null) && (code.length >= 2) && (
Set("/", "\\", "./", "../", "~/") exists (code startsWith _)
)
object Forwarder {
def apply(forwardTo: () => Option[CompletionAware]): CompletionAware = new CompletionAware {
def completions(verbosity: Int) = forwardTo() map (_ completions verbosity) getOrElse Nil
override def follow(s: String) = forwardTo() flatMap (_ follow s)
}
}
}
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