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tab completion: print message when input is invalid

This commit is contained in:
Mark Harrah 2011-03-24 21:23:11 -04:00
parent 7feebe2f85
commit 339c59bad4
1 changed files with 9 additions and 1 deletions
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10
util/complete/JLineCompletion.scala
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@ -40,9 +40,17 @@ object JLineCompletion
def parserAsCompletor(p: Parser[_]): ConsoleReader => Boolean =
customCompletor(str => convertCompletions(Parser.completions(p, str)))
def convertCompletions(c: Completions): (Seq[String], Seq[String]) =
{
val cs = c.get
if(cs.isEmpty)
(Nil, "{invalid input}" :: Nil)
else
convertCompletions(cs)
}
def convertCompletions(cs: Set[Completion]): (Seq[String], Seq[String]) =
{
val (insert, display) =
( (Set.empty[String], Set.empty[String]) /: c.get) { case ( t @ (insert,display), comp) =>
( (Set.empty[String], Set.empty[String]) /: cs) { case ( t @ (insert,display), comp) =>
if(comp.isEmpty) t else (insert + comp.append, appendNonEmpty(display, comp.display.trim))
}
(insert.toSeq, display.toSeq.sorted)