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/* ____ ____ ____ ____ ______ *\
** / __// __ \/ __// __ \/ ____/ SOcos COmpiles Scala **
** __\_ \/ /_/ / /__/ /_/ /\_ \ (c) 2002, LAMP/EPFL **
** /_____/\____/\___/\____/____/ **
\* */
// $Id$
package scala.tools.nsc.reporters;
import scala.tools.nsc.util.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(pos : Position, msg : String) : Unit = {
if (pos != null) {
val buf = new StringBuffer(msg);
buf.insert(0, " ");
if (pos.line != Position.NOLINE)
buf.insert(0, ":" + pos.line);
val file = pos.source.file;
buf.insert(0, if (shortname) file.getName() else file.getPath());
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);
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");
}
}
}
|
