diff options
Diffstat (limited to 'src/repl')
| -rw-r--r-- | src/repl/scala/tools/nsc/interpreter/Formatting.scala | 27 | ||||
| -rw-r--r-- | src/repl/scala/tools/nsc/interpreter/ILoop.scala | 110 | ||||
| -rw-r--r-- | src/repl/scala/tools/nsc/interpreter/IMain.scala | 19 | ||||
| -rw-r--r-- | src/repl/scala/tools/nsc/interpreter/Pasted.scala | 22 | ||||
| -rw-r--r-- | src/repl/scala/tools/nsc/interpreter/ReplProps.scala | 11 |
5 files changed, 97 insertions, 92 deletions
diff --git a/src/repl/scala/tools/nsc/interpreter/Formatting.scala b/src/repl/scala/tools/nsc/interpreter/Formatting.scala index 43e653edfd..844997429c 100644 --- a/src/repl/scala/tools/nsc/interpreter/Formatting.scala +++ b/src/repl/scala/tools/nsc/interpreter/Formatting.scala @@ -8,28 +8,25 @@ package interpreter import util.stringFromWriter -trait Formatting { - def prompt: String +class Formatting(indent: Int) { - def spaces(code: String): String = { + private val indentation = " " * indent + + private def indenting(code: String): Boolean = { /** Heuristic to avoid indenting and thereby corrupting """-strings and XML literals. */ val tokens = List("\"\"\"", "</", "/>") val noIndent = (code contains "\n") && (tokens exists code.contains) - if (noIndent) "" - else prompt drop 1 map (_ => ' ') + !noIndent } /** Indent some code by the width of the scala> prompt. * This way, compiler error messages read better. */ - def indentCode(code: String) = { - val indent = spaces(code) - stringFromWriter(str => - for (line <- code.lines) { - str print indent - str print (line + "\n") - str.flush() - } - ) - } + def indentCode(code: String) = stringFromWriter(str => + for (line <- code.lines) { + if (indenting(code)) str print indentation + str println line + str.flush() + } + ) } diff --git a/src/repl/scala/tools/nsc/interpreter/ILoop.scala b/src/repl/scala/tools/nsc/interpreter/ILoop.scala index a3047ccc8e..525609171e 100644 --- a/src/repl/scala/tools/nsc/interpreter/ILoop.scala +++ b/src/repl/scala/tools/nsc/interpreter/ILoop.scala @@ -111,11 +111,10 @@ class ILoop(in0: Option[BufferedReader], protected val out: JPrintWriter) } class ILoopInterpreter extends IMain(settings, out) { - outer => - - override lazy val formatting = new Formatting { - def prompt = ILoop.this.prompt - } + // the expanded prompt but without color escapes and without leading newline, for purposes of indenting + override lazy val formatting: Formatting = new Formatting( + (replProps.promptString format Properties.versionNumberString).lines.toList.last.length + ) override protected def parentClassLoader = settings.explicitParentLoader.getOrElse( classOf[ILoop].getClassLoader ) } @@ -199,10 +198,8 @@ class ILoop(in0: Option[BufferedReader], protected val out: JPrintWriter) echo("%d %s".format(index + offset, line)) } - private val currentPrompt = Properties.shellPromptString - /** Prompt to print when awaiting input */ - def prompt = currentPrompt + def prompt = replProps.prompt import LoopCommand.{ cmd, nullary } @@ -412,14 +409,8 @@ class ILoop(in0: Option[BufferedReader], protected val out: JPrintWriter) } private def readOneLine() = { - import scala.io.AnsiColor.{ MAGENTA, RESET } out.flush() - in readLine ( - if (replProps.colorOk) - MAGENTA + prompt + RESET - else - prompt - ) + in readLine prompt } /** The main read-eval-print loop for the repl. It calls @@ -770,8 +761,13 @@ class ILoop(in0: Option[BufferedReader], protected val out: JPrintWriter) } private object paste extends Pasted { + import scala.util.matching.Regex.quote val ContinueString = " | " - val PromptString = "scala> " + val PromptString = prompt.lines.toList.last + val anyPrompt = s"""\\s*(?:${quote(PromptString.trim)}|${quote(AltPromptString.trim)})\\s*""".r + + def isPrompted(line: String) = matchesPrompt(line) + def isPromptOnly(line: String) = line match { case anyPrompt() => true ; case _ => false } def interpret(line: String): Unit = { echo(line.trim) @@ -781,10 +777,17 @@ class ILoop(in0: Option[BufferedReader], protected val out: JPrintWriter) def transcript(start: String) = { echo("\n// Detected repl transcript paste: ctrl-D to finish.\n") - apply(Iterator(start) ++ readWhile(_.trim != PromptString.trim)) + apply(Iterator(start) ++ readWhile(!isPromptOnly(_))) } + + def unapply(line: String): Boolean = isPrompted(line) + } + + private object invocation { + def unapply(line: String): Boolean = Completion.looksLikeInvocation(line) } - import paste.{ ContinueString, PromptString } + + private val lineComment = """\s*//.*""".r // all comment /** Interpret expressions starting with the first line. * Read lines until a complete compilation unit is available @@ -796,53 +799,42 @@ class ILoop(in0: Option[BufferedReader], protected val out: JPrintWriter) // signal completion non-completion input has been received in.completion.resetVerbosity() - def reallyInterpret = { - val reallyResult = intp.interpret(code) - (reallyResult, reallyResult match { - case IR.Error => None - case IR.Success => Some(code) - case IR.Incomplete => - if (in.interactive && code.endsWith("\n\n")) { - echo("You typed two blank lines. Starting a new command.") + def reallyInterpret = intp.interpret(code) match { + case IR.Error => None + case IR.Success => Some(code) + case IR.Incomplete if in.interactive && code.endsWith("\n\n") => + echo("You typed two blank lines. Starting a new command.") + None + case IR.Incomplete => + in.readLine(paste.ContinueString) match { + case null => + // we know compilation is going to fail since we're at EOF and the + // parser thinks the input is still incomplete, but since this is + // a file being read non-interactively we want to fail. So we send + // it straight to the compiler for the nice error message. + intp.compileString(code) None - } - else in.readLine(ContinueString) match { - case null => - // we know compilation is going to fail since we're at EOF and the - // parser thinks the input is still incomplete, but since this is - // a file being read non-interactively we want to fail. So we send - // it straight to the compiler for the nice error message. - intp.compileString(code) - None - - case line => interpretStartingWith(code + "\n" + line) - } - }) + + case line => interpretStartingWith(code + "\n" + line) + } } - /** Here we place ourselves between the user and the interpreter and examine - * the input they are ostensibly submitting. We intervene in several cases: + /* Here we place ourselves between the user and the interpreter and examine + * the input they are ostensibly submitting. We intervene in several cases: * - * 1) If the line starts with "scala> " it is assumed to be an interpreter paste. - * 2) If the line starts with "." (but not ".." or "./") it is treated as an invocation - * on the previous result. - * 3) If the Completion object's execute returns Some(_), we inject that value - * and avoid the interpreter, as it's likely not valid scala code. + * 1) If the line starts with "scala> " it is assumed to be an interpreter paste. + * 2) If the line starts with "." (but not ".." or "./") it is treated as an invocation + * on the previous result. + * 3) If the Completion object's execute returns Some(_), we inject that value + * and avoid the interpreter, as it's likely not valid scala code. */ - if (code == "") None - else if (!paste.running && code.trim.startsWith(PromptString)) { - paste.transcript(code) - None - } - else if (Completion.looksLikeInvocation(code) && intp.mostRecentVar != "") { - interpretStartingWith(intp.mostRecentVar + code) + code match { + case "" => None + case lineComment() => None // line comment, do nothing + case paste() if !paste.running => paste.transcript(code) ; None + case invocation() if intp.mostRecentVar != "" => interpretStartingWith(intp.mostRecentVar + code) + case _ => reallyInterpret } - else if (code.trim startsWith "//") { - // line comment, do nothing - None - } - else - reallyInterpret._2 } // runs :load `file` on any files passed via -i diff --git a/src/repl/scala/tools/nsc/interpreter/IMain.scala b/src/repl/scala/tools/nsc/interpreter/IMain.scala index e355d9f864..2550a5dc57 100644 --- a/src/repl/scala/tools/nsc/interpreter/IMain.scala +++ b/src/repl/scala/tools/nsc/interpreter/IMain.scala @@ -112,12 +112,13 @@ class IMain(@BeanProperty val factory: ScriptEngineFactory, initialSettings: Set def this(factory: ScriptEngineFactory) = this(factory, new Settings()) def this() = this(new Settings()) - lazy val formatting: Formatting = new Formatting { - val prompt = Properties.shellPromptString - } + // the expanded prompt but without color escapes and without leading newline, for purposes of indenting + lazy val formatting: Formatting = new Formatting( + (replProps.promptString format Properties.versionNumberString).lines.toList.last.length + ) lazy val reporter: ReplReporter = new ReplReporter(this) - import formatting._ + import formatting.indentCode import reporter.{ printMessage, printUntruncatedMessage } // This exists mostly because using the reporter too early leads to deadlock. @@ -468,7 +469,7 @@ class IMain(@BeanProperty val factory: ScriptEngineFactory, initialSettings: Set } private def requestFromLine(line: String, synthetic: Boolean): Either[IR.Result, Request] = { - val content = indentCode(line) + val content = line //indentCode(line) val trees = parse(content) match { case parse.Incomplete => return Left(IR.Incomplete) case parse.Error => return Left(IR.Error) @@ -909,10 +910,10 @@ class IMain(@BeanProperty val factory: ScriptEngineFactory, initialSettings: Set else List("def %s = %s".format("$line", tquoted(originalLine)), "def %s = Nil".format("$trees")) } def preamble = s""" - |$preambleHeader - |%s%s%s - """.stripMargin.format(lineRep.readName, envLines.map(" " + _ + ";\n").mkString, - importsPreamble, indentCode(toCompute)) + |${preambleHeader format lineRep.readName} + |${envLines mkString (" ", ";\n ", ";\n")} + |$importsPreamble + |${indentCode(toCompute)}""".stripMargin val generate = (m: MemberHandler) => m extraCodeToEvaluate Request.this diff --git a/src/repl/scala/tools/nsc/interpreter/Pasted.scala b/src/repl/scala/tools/nsc/interpreter/Pasted.scala index f5db3d9e3a..5f388eb15b 100644 --- a/src/repl/scala/tools/nsc/interpreter/Pasted.scala +++ b/src/repl/scala/tools/nsc/interpreter/Pasted.scala @@ -16,17 +16,21 @@ package interpreter * the same result. */ abstract class Pasted { + def interpret(line: String): Unit def ContinueString: String def PromptString: String - def interpret(line: String): Unit + def AltPromptString: String = "scala> " + + private val testBoth = PromptString != AltPromptString + private val spacey = " \t".toSet - def matchesPrompt(line: String) = matchesString(line, PromptString) + def matchesPrompt(line: String) = matchesString(line, PromptString) || testBoth && matchesString(line, AltPromptString) def matchesContinue(line: String) = matchesString(line, ContinueString) def running = isRunning private def matchesString(line: String, target: String): Boolean = ( (line startsWith target) || - (line.nonEmpty && " \t".toSet(line.head) && matchesString(line.tail, target)) + (line.nonEmpty && spacey(line.head) && matchesString(line.tail, target)) ) private def stripString(line: String, target: String) = line indexOf target match { case -1 => line @@ -39,7 +43,9 @@ abstract class Pasted { private class PasteAnalyzer(val lines: List[String]) { val referenced = lines flatMap (resReference findAllIn _.trim.stripPrefix("res")) toSet - val cmds = lines reduceLeft append split PromptString filterNot (_.trim == "") toList + val ActualPromptString = lines find matchesPrompt map (s => + if (matchesString(s, PromptString)) PromptString else AltPromptString) getOrElse PromptString + val cmds = lines reduceLeft append split ActualPromptString filterNot (_.trim == "") toList /** If it's a prompt or continuation line, strip the formatting bits and * assemble the code. Otherwise ship it off to be analyzed for res references @@ -67,10 +73,10 @@ abstract class Pasted { */ def fixResRefs(code: String, line: String) = line match { case resCreation(resName) if referenced(resName) => - code.lastIndexOf(PromptString) match { + code.lastIndexOf(ActualPromptString) match { case -1 => code case idx => - val (str1, str2) = code splitAt (idx + PromptString.length) + val (str1, str2) = code splitAt (idx + ActualPromptString.length) str2 match { case resAssign(`resName`) => code case _ => "%sval %s = { %s }".format(str1, resName, str2) @@ -79,10 +85,10 @@ abstract class Pasted { case _ => code } - def run() { + def run(): Unit = { println("// Replaying %d commands from transcript.\n" format cmds.size) cmds foreach { cmd => - print(PromptString) + print(ActualPromptString) interpret(cmd) } } diff --git a/src/repl/scala/tools/nsc/interpreter/ReplProps.scala b/src/repl/scala/tools/nsc/interpreter/ReplProps.scala index 8c4faf7278..df65e9974d 100644 --- a/src/repl/scala/tools/nsc/interpreter/ReplProps.scala +++ b/src/repl/scala/tools/nsc/interpreter/ReplProps.scala @@ -6,12 +6,13 @@ package scala.tools.nsc package interpreter +import Properties.shellPromptString import scala.sys._ import Prop._ class ReplProps { private def bool(name: String) = BooleanProp.keyExists(name) - private def int(name: String) = IntProp(name) + private def int(name: String) = Prop[Int](name) // This property is used in TypeDebugging. Let's recycle it. val colorOk = bool("scala.color") @@ -21,6 +22,14 @@ class ReplProps { val trace = bool("scala.repl.trace") val power = bool("scala.repl.power") + // Handy system prop for shell prompt, or else pick it up from compiler.properties + val promptString = Prop[String]("scala.repl.prompt").option getOrElse (if (info) "%nscala %s> " else shellPromptString) + val prompt = { + import scala.io.AnsiColor.{ MAGENTA, RESET } + val p = promptString format Properties.versionNumberString + if (colorOk) s"$MAGENTA$p$RESET" else p + } + /** CSV of paged,across to enable pagination or `-x` style * columns, "across" instead of down the column. Since * pagination turns off columnar output, these flags are |