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/* NSC -- new Scala compiler
* Copyright 2002-2009 LAMP/EPFL
* @author Martin Odersky
*/
// $Id$
package scala.tools.nsc
package reporters
import scala.collection.mutable.HashMap
import scala.tools.nsc.Settings
import scala.tools.nsc.util.Position
/**
* This reporter implements filtering.
*/
abstract class AbstractReporter extends Reporter {
private val positions = new HashMap[Position, Severity]
override def reset {
super.reset
positions.clear
}
val settings: Settings
def display(pos: Position, msg: String, severity: Severity): Unit
def displayPrompt: Unit
protected def info0(pos: Position, msg: String, severity: Severity, force: Boolean) {
severity match {
case INFO =>
if (force || settings.verbose.value) display(pos, msg, severity)
case WARNING =>
val hidden = testAndLog(pos, severity)
if (!settings.nowarnings.value) {
if (!hidden || settings.prompt.value) display(pos, msg, severity)
if (settings.prompt.value) displayPrompt
}
case ERROR =>
val hidden = testAndLog(pos, severity)
if (!hidden || settings.prompt.value) display(pos, msg, severity)
if (settings.prompt.value) displayPrompt
}
}
/** Logs a position and returns <code>true</code> if it was already logged.
* @note Two positions are considered identical for logging if they have the same point.
*
* @param pos ...
* @return <code>true</code> if <code>pos</code> was already logged.
*/
private def testAndLog(pos: Position, severity: Severity): Boolean = {
if (pos eq null) return false
if (pos.offset.isEmpty) return false
val fpos = pos.focusPoint
if ((positions contains fpos) && positions(fpos) >= severity) return true
positions += (fpos -> severity)
false
}
}
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