Add ability to choose between fancy and non-fancy output

1 files changed, 72 insertions, 0 deletions

diff --git a/src/dotty/tools/dotc/reporting/ConsoleReporter.scala b/src/dotty/tools/dotc/reporting/ConsoleReporter.scala
new file mode 100644
index 000000000..1d9423b70
--- /dev/null
+++ b/src/dotty/tools/dotc/reporting/ConsoleReporter.scala
@@ -0,0 +1,72 @@
+package dotty.tools
+package dotc
+package reporting
+
+import scala.collection.mutable
+import util.SourcePosition
+import core.Contexts._
+import Reporter._
+import java.io.{ BufferedReader, IOException, PrintWriter }
+import scala.reflect.internal.util._
+
+/**
+ * This class implements a Reporter that displays messages on a text
+ * console.
+ */
+class ConsoleReporter(
+    reader: BufferedReader = Console.in,
+    writer: PrintWriter = new PrintWriter(Console.err, true))
+  extends Reporter with UniqueMessagePositions with HideNonSensicalMessages {
+
+  /** maximal number of error messages to be printed */
+  protected def ErrorLimit = 100
+
+  def printSourceLine(pos: SourcePosition) =
+    printMessage(pos.lineContent.stripLineEnd)
+
+  def printColumnMarker(pos: SourcePosition) =
+    if (pos.exists) { printMessage(" " * pos.column + "^") }
+
+  /** Prints the message. */
+  def printMessage(msg: String): Unit = { writer.print(msg + "\n"); writer.flush() }
+
+  /** Prints the message with the given position indication. */
+  def printMessageAndPos(msg: String, pos: SourcePosition, kind: String = "")(implicit ctx: Context): Unit = {
+    val posStr = if (pos.exists) s"$pos: " else ""
+    printMessage(posStr + kind + msg)
+    if (pos.exists) {
+      printSourceLine(pos)
+      printColumnMarker(pos)
+    }
+  }
+
+  override def doReport(d: Diagnostic)(implicit ctx: Context): Unit = d match {
+    case d: Error =>
+      printMessageAndPos(d.message, d.pos, d.kind)
+      if (ctx.settings.prompt.value) displayPrompt()
+    case d: ConditionalWarning if !d.enablingOption.value =>
+    case d: MigrationWarning =>
+      printMessageAndPos(d.message, d.pos, d.kind)
+    case d: Warning =>
+      printMessageAndPos(d.message, d.pos, d.kind)
+    case _ =>
+      printMessageAndPos(d.message, d.pos, d.kind)
+  }
+
+  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') {
+        Thread.dumpStack()
+        if (response == 'a')
+          sys.exit(1)
+      }
+      writer.print("\n")
+      writer.flush()
+    }
+  }
+
+  override def flush()(implicit ctx: Context): Unit = { writer.flush() }
+}