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/* NSC -- new Scala compiler
* Copyright 2002-2010 LAMP/EPFL
* @author Martin Odersky
*/
// $Id$
package scala.tools.nsc
package reporters
import java.io.{BufferedReader, InputStreamReader, IOException, PrintWriter}
import util._
/**
* This class implements a Reporter that displays messages on a text
* console.
*/
class ConsoleReporter(val settings: Settings, reader: BufferedReader, writer: PrintWriter) extends AbstractReporter {
/** 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
}
private def clabel(severity: Severity): String = {
val label0 = label(severity)
if (label0 eq null) "" else label0 + ": "
}
def this(settings: Settings) =
this(settings, Console.in, new PrintWriter(Console.err, true))
/** Returns the number of errors issued totally as a string.
*
* @param severity ...
* @return ...
*/
private def getCountString(severity: Severity): String =
countElementsAsString((severity).count, label(severity))
/** Prints the message. */
//def printMessage(msg: String) { writer.println(msg) } // platform-dependent!
def printMessage(msg: String) { writer.print(msg + "\n"); writer.flush() }
/** Prints the message with the given position indication. */
def printMessage(posIn: Position, msg: String) {
val pos = if (posIn eq null) NoPosition
else if (posIn.isDefined) posIn.inUltimateSource(posIn.source)
else posIn
pos match {
case FakePos(fmsg) =>
printMessage(fmsg+" "+msg)
case NoPosition =>
printMessage(msg)
case _ =>
val buf = new StringBuilder(msg)
val file = pos.source.file
printMessage((if (shortname) file.name else file.path)+":"+pos.line+": "+msg)
printSourceLine(pos)
}
}
def print(pos: Position, msg: String, severity: Severity) {
printMessage(pos, clabel(severity) + msg)
}
/**
* @param pos ...
*/
def printSourceLine(pos: Position) {
printMessage(pos.lineContent.stripLineEnd)
printColumnMarker(pos)
}
/** Prints the column marker of the given position.
*
* @param pos ...
*/
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) {
severity.count += 1
if (severity != ERROR || severity.count <= ERROR_LIMIT)
print(pos, msg, severity)
}
def displayPrompt: Unit = try {
var continue = true
while (continue) {
writer.print("r)esume, a)bort: ")
writer.flush()
var line = reader.readLine()
if (line ne null) {
line = line.toLowerCase()
if ("abort" startsWith line)
abort("user abort")
if ("resume" startsWith line)
continue = false
}
}
}
catch {
case ex: IOException => {
ex.printStackTrace()
abort("input read error")
}
}
private def abort(msg: String) = throw new Error(msg)
override def flush() { writer.flush() }
}
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