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/* NSC -- new Scala compiler
* Copyright 2009-2013 Typesafe/Scala Solutions and LAMP/EPFL
* @author Martin Odersky
*/
package scala.tools.nsc
package interactive
import util.InterruptReq
import scala.reflect.internal.util.{ SourceFile, BatchSourceFile }
import io.{ AbstractFile, PlainFile }
import util.EmptyAction
import scala.reflect.internal.util.Position
import Pickler._
import scala.collection.mutable
import mutable.ListBuffer
trait Picklers { self: Global =>
lazy val freshRunReq =
unitPickler
.wrapped { _ => new FreshRunReq } { x => () }
.labelled ("FreshRunReq")
.cond (_.isInstanceOf[FreshRunReq])
lazy val shutdownReq = singletonPickler(ShutdownReq)
def defaultThrowable[T <: Throwable]: CondPickler[T] = javaInstancePickler[T] cond { _ => true }
implicit lazy val throwable: Pickler[Throwable] =
freshRunReq | shutdownReq | defaultThrowable
implicit def abstractFile: Pickler[AbstractFile] =
pkl[String]
.wrapped[AbstractFile] { new PlainFile(_) } { _.path }
.asClass (classOf[PlainFile])
private val sourceFilesSeen = new mutable.HashMap[AbstractFile, Array[Char]] {
override def default(key: AbstractFile) = Array()
}
type Diff = (Int /*start*/, Int /*end*/, String /*replacement*/)
def delta(f: AbstractFile, cs: Array[Char]): Diff = {
val bs = sourceFilesSeen(f)
var start = 0
while (start < bs.length && start < cs.length && bs(start) == cs(start)) start += 1
var end = bs.length
var end2 = cs.length
while (end > start && end2 > start && bs(end - 1) == cs(end2 - 1)) { end -= 1; end2 -= 1 }
sourceFilesSeen(f) = cs
(start, end, cs.slice(start, end2).mkString(""))
}
def patch(f: AbstractFile, d: Diff): Array[Char] = {
val (start, end, replacement) = d
val patched = sourceFilesSeen(f).patch(start, replacement, end - start)
sourceFilesSeen(f) = patched
patched
}
implicit lazy val sourceFile: Pickler[SourceFile] =
(pkl[AbstractFile] ~ pkl[Diff]).wrapped[SourceFile] {
case f ~ d => new BatchSourceFile(f, patch(f, d))
} {
f => f.file ~ delta(f.file, f.content)
}.asClass (classOf[BatchSourceFile])
lazy val offsetPosition: CondPickler[Position] =
(pkl[SourceFile] ~ pkl[Int])
.wrapped { case x ~ y => Position.offset(x, y) } { p => p.source ~ p.point }
.asClass (classOf[Position])
lazy val rangePosition: CondPickler[Position] =
(pkl[SourceFile] ~ pkl[Int] ~ pkl[Int] ~ pkl[Int])
.wrapped { case source ~ start ~ point ~ end => Position.range(source, start, point, end) } { p => p.source ~ p.start ~ p.point ~ p.end }
.asClass (classOf[Position])
lazy val transparentPosition: CondPickler[Position] =
(pkl[SourceFile] ~ pkl[Int] ~ pkl[Int] ~ pkl[Int])
.wrapped { case source ~ start ~ point ~ end => Position.range(source, start, point, end).makeTransparent } { p => p.source ~ p.start ~ p.point ~ p.end }
.asClass (classOf[Position])
lazy val noPosition = singletonPickler(NoPosition)
implicit lazy val position: Pickler[Position] = transparentPosition | rangePosition | offsetPosition | noPosition
implicit lazy val namePickler: Pickler[Name] =
pkl[String] .wrapped[Name] {
str => if ((str.length > 1) && (str endsWith "!")) newTypeName(str.init) else newTermName(str)
} {
name => if (name.isTypeName) name.toString+"!" else name.toString
}
implicit lazy val symPickler: Pickler[Symbol] = {
def ownerNames(sym: Symbol, buf: ListBuffer[Name]): ListBuffer[Name] = {
if (!sym.isRoot) {
ownerNames(sym.owner, buf)
buf += (if (sym.isModuleClass) sym.sourceModule else sym).name
if (!sym.isType && !sym.isStable) { // TODO: what's the reasoning behind this condition!?
val sym1 = sym.owner.info.decl(sym.name)
if (sym1.isOverloaded) {
val index = sym1.alternatives.indexOf(sym)
assert(index >= 0, sym1+" not found in alternatives "+sym1.alternatives)
buf += newTermName(index.toString)
}
}
}
buf
}
def makeSymbol(root: Symbol, names: List[Name]): Symbol = names match {
case List() =>
root
case name :: rest =>
val sym = root.info.decl(name)
if (sym.isOverloaded) makeSymbol(sym.alternatives(rest.head.toString.toInt), rest.tail)
else makeSymbol(sym, rest)
}
pkl[List[Name]] .wrapped { makeSymbol(rootMirror.RootClass, _) } { ownerNames(_, new ListBuffer).toList }
}
implicit def workEvent: Pickler[WorkEvent] = {
(pkl[Int] ~ pkl[Long])
.wrapped { case id ~ ms => WorkEvent(id, ms) } { w => w.atNode ~ w.atMillis }
}
implicit def interruptReq: Pickler[InterruptReq] = {
val emptyIR: InterruptReq = new InterruptReq { type R = Unit; val todo = () => () }
pkl[Unit] .wrapped { _ => emptyIR } { _ => () }
}
implicit def reloadItem: CondPickler[ReloadItem] =
pkl[List[SourceFile]]
.wrapped { ReloadItem(_, new Response) } { _.sources }
.asClass (classOf[ReloadItem])
implicit def askTypeAtItem: CondPickler[AskTypeAtItem] =
pkl[Position]
.wrapped { new AskTypeAtItem(_, new Response) } { _.pos }
.asClass (classOf[AskTypeAtItem])
implicit def askTypeItem: CondPickler[AskTypeItem] =
(pkl[SourceFile] ~ pkl[Boolean])
.wrapped { case source ~ forceReload => new AskTypeItem(source, forceReload, new Response) } { w => w.source ~ w.forceReload }
.asClass (classOf[AskTypeItem])
implicit def askTypeCompletionItem: CondPickler[AskTypeCompletionItem] =
pkl[Position]
.wrapped { new AskTypeCompletionItem(_, new Response) } { _.pos }
.asClass (classOf[AskTypeCompletionItem])
implicit def askScopeCompletionItem: CondPickler[AskScopeCompletionItem] =
pkl[Position]
.wrapped { new AskScopeCompletionItem(_, new Response) } { _.pos }
.asClass (classOf[AskScopeCompletionItem])
implicit def askToDoFirstItem: CondPickler[AskToDoFirstItem] =
pkl[SourceFile]
.wrapped { new AskToDoFirstItem(_) } { _.source }
.asClass (classOf[AskToDoFirstItem])
implicit def askLinkPosItem: CondPickler[AskLinkPosItem] =
(pkl[Symbol] ~ pkl[SourceFile])
.wrapped { case sym ~ source => new AskLinkPosItem(sym, source, new Response) } { item => item.sym ~ item.source }
.asClass (classOf[AskLinkPosItem])
implicit def askDocCommentItem: CondPickler[AskDocCommentItem] =
(pkl[Symbol] ~ pkl[SourceFile] ~ pkl[Symbol] ~ pkl[List[(Symbol,SourceFile)]])
.wrapped { case sym ~ source ~ site ~ fragments => new AskDocCommentItem(sym, source, site, fragments, new Response) } { item => item.sym ~ item.source ~ item.site ~ item.fragments }
.asClass (classOf[AskDocCommentItem])
implicit def askLoadedTypedItem: CondPickler[AskLoadedTypedItem] =
pkl[SourceFile]
.wrapped { source => new AskLoadedTypedItem(source, false, new Response) } { _.source }
.asClass (classOf[AskLoadedTypedItem])
implicit def askParsedEnteredItem: CondPickler[AskParsedEnteredItem] =
(pkl[SourceFile] ~ pkl[Boolean])
.wrapped { case source ~ keepLoaded => new AskParsedEnteredItem(source, keepLoaded, new Response) } { w => w.source ~ w.keepLoaded }
.asClass (classOf[AskParsedEnteredItem])
implicit def emptyAction: CondPickler[EmptyAction] =
pkl[Unit]
.wrapped { _ => new EmptyAction } { _ => () }
.asClass (classOf[EmptyAction])
implicit def action: Pickler[() => Unit] =
reloadItem | askTypeAtItem | askTypeItem | askTypeCompletionItem | askScopeCompletionItem |
askToDoFirstItem | askLinkPosItem | askDocCommentItem | askLoadedTypedItem | askParsedEnteredItem | emptyAction
}
|
