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/* NSC -- new Scala compiler
* Copyright 2002-2013 LAMP/EPFL
* @author Martin Odersky
*/
package scala
package tools.nsc
package reporters
import java.io.{ BufferedReader, IOException, PrintWriter }
import scala.reflect.internal.util._
import StringOps._
/**
* This class implements a Reporter that displays messages on a text console.
*/
class ConsoleReporter(val settings: Settings, reader: BufferedReader, writer: PrintWriter) extends AbstractReporter {
def this(settings: Settings) = this(settings, Console.in, new PrintWriter(Console.err, true))
/** Whether a short file name should be displayed before errors */
var shortname: Boolean = false
/** maximal number of error messages to be printed */
final val ERROR_LIMIT = 100
private def label(severity: Severity): String = severity match {
case ERROR => "error"
case WARNING => "warning"
case INFO => null
}
protected def clabel(severity: Severity): String = {
val label0 = label(severity)
if (label0 eq null) "" else label0 + ": "
}
/** Returns the number of errors issued totally as a string.
*/
private def getCountString(severity: Severity): String =
StringOps.countElementsAsString((severity).count, label(severity))
/** Prints the message. */
def printMessage(msg: String) {
writer print trimAllTrailingSpace(msg) + "\n"
writer.flush()
}
/** Prints the message with the given position indication. */
def printMessage(posIn: Position, msg: String) {
printMessage(Position.formatMessage(posIn, msg, shortname))
}
def print(pos: Position, msg: String, severity: Severity) {
printMessage(pos, clabel(severity) + msg)
}
/** Prints the column marker of the given position.
*/
def printColumnMarker(pos: Position) =
if (pos.isDefined) { printMessage(" " * (pos.column - 1) + "^") }
/** Prints the number of errors and warnings if their are non-zero. */
def printSummary() {
if (WARNING.count > 0) printMessage(getCountString(WARNING) + " found")
if ( ERROR.count > 0) printMessage(getCountString(ERROR ) + " found")
}
def display(pos: Position, msg: String, severity: Severity) {
if (severity != ERROR || severity.count <= ERROR_LIMIT)
print(pos, msg, severity)
}
def displayPrompt(): Unit = {
writer.print("\na)bort, s)tack, r)esume: ")
writer.flush()
if (reader != null) {
val response = reader.read().asInstanceOf[Char].toLower
if (response == 'a' || response == 's') {
(new Exception).printStackTrace()
if (response == 'a')
sys exit 1
writer.print("\n")
writer.flush()
}
}
}
override def flush() { writer.flush() }
}
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