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/* ____ ____ ____ ____ ______ *\
** / __// __ \/ __// __ \/ ____/ SOcos COmpiles Scala **
** __\_ \/ /_/ / /__/ /_/ /\_ \ (c) 2002, LAMP/EPFL **
** /_____/\____/\___/\____/____/ **
\* */
// $Id$
package scala.tools.nsc.reporters
import scala.tools.nsc.util.{FakePos, Position}
import java.io.BufferedReader
import java.io.InputStreamReader
import java.io.IOException
import java.io.PrintWriter
/**
* This class implements a Reporter that displays messages on a text
* console.
*/
class ConsoleReporter(reader : BufferedReader, writer : PrintWriter) extends AbstractReporter {
//########################################################################
// Public Fields
/** Whether a short file name should be displayed before errors */
var shortname : Boolean = false
def label(severity : Severity): String = severity match {
case ERROR => "error"
case WARNING => "warning"
case INFO => null
}
def clabel(severity : Severity) = {
val label0 = label(severity)
if (label0 == null) "" else label0 + ": "
}
//########################################################################
// Public Constructors
def this() = this(
new BufferedReader(new InputStreamReader(System.in)),
new PrintWriter(System.err, true))
//########################################################################
// Public Methods - Count
/** Returns the number of errors issued totally as a string */
def getCountString(severity : Severity) : String = getCountString0(count(severity), label(severity))
/** Returns a string meaning "n elements". */
def getCountString0(n : Int, elements : String) : String =
n match {
case 0 => "no " + elements + "s"
case 1 => "one " + elements
case 2 => "two " + elements + "s"
case 3 => "three " + elements + "s"
case 4 => "four " + elements + "s"
case _ => "" + n + " " + elements + "s"
}
//########################################################################
// Public Methods - Print
/** Prints the message. */
def printMessage(msg : String) = writer.println(msg)
/** Prints the message with the given position indication. */
def printMessage(posIn : Position, msg : String) : Unit = {
if (posIn != null) {
val pos = posIn.inUltimateSource
val buf = new StringBuffer(msg)
buf.insert(0, " ")
if (pos.line != Position.NOLINE)
buf.insert(0, ":" + pos.line)
pos match {
case FakePos(msg) =>
buf.insert(0,msg)
case _ =>
val file = pos.source.file
buf.insert(0, if (shortname) file.name else file.path)
}
printMessage(buf.toString())
printSourceLine(pos)
} else printMessage(msg)
}
def print(pos : Position, msg : String, severity : Severity) = printMessage(pos, clabel(severity) + msg)
def printSourceLine(pos : Position) = if (pos != null && pos.offset != Position.NOPOS) {
printMessage(pos.lineContent.stripLineEnd)
printColumnMarker(pos)
}
/** Prints the column marker of the given position. */
def printColumnMarker(pos : Position) = if (pos != null) {
val buffer = new StringBuffer(pos.column)
var i = 1
while (i < pos.column) {
buffer.append(' ')
i = i + 1
}
if (pos.column > 0) buffer.append('^')
printMessage(buffer.toString())
}
/** Prints the number of errors and warnings if their are non-zero. */
def printSummary() = {
if (warnings > 0) printMessage(getCountString(WARNING) + " found")
if ( errors > 0) printMessage(getCountString(ERROR ) + " found")
}
//########################################################################
// Public Methods - Display
def display(pos : Position, msg : String, severity : Severity) : Unit = {
incr(severity)
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 != null) {
line = line.toLowerCase()
if ("abort".startsWith(line))
throw new Error("user abort")
if ("resume".startsWith(line)) continue = false
}
}
} catch {
case ex: IOException => {
ex.printStackTrace()
throw new Error("input read error")
}
}
}
|
