src/Pure/PIDE/isar_document.scala
author wenzelm
Sun, 22 Aug 2010 20:11:17 +0200
changeset 38581 d503a0912e14
parent 38567 b670faa807c9
child 38887 1261481ef5e5
permissions -rw-r--r--
simplified Command.status again, reverting most of e5eed57913d0 (note that more complex information can be represented with full markup reports);
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/*  Title:      Pure/PIDE/isar_document.scala
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    Author:     Makarius
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Protocol message formats for interactive Isar documents.
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*/
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package isabelle
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object Isar_Document
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{
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  /* document editing */
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  object Assign {
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    def unapply(msg: XML.Tree)
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        : Option[(Document.Version_ID, List[(Document.Command_ID, Document.Exec_ID)])] =
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      msg match {
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        case XML.Elem(Markup(Markup.ASSIGN, List((Markup.VERSION, Document.ID(id)))), edits) =>
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          val id_edits = edits.map(Edit.unapply)
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          if (id_edits.forall(_.isDefined)) Some((id, id_edits.map(_.get)))
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          else None
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        case _ => None
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      }
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  }
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  object Edit {
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    def unapply(msg: XML.Tree): Option[(Document.Command_ID, Document.Exec_ID)] =
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      msg match {
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        case XML.Elem(
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          Markup(Markup.EDIT,
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            List((Markup.ID, Document.ID(i)), (Markup.EXEC, Document.ID(j)))), Nil) => Some((i, j))
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        case _ => None
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      }
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  }
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  /* toplevel transactions */
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  sealed abstract class Status
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  case class Forked(forks: Int) extends Status
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  case object Unprocessed extends Status
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  case object Finished extends Status
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  case object Failed extends Status
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  def command_status(markup: List[Markup]): Status =
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  {
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    val forks = (0 /: markup) {
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      case (i, Markup(Markup.FORKED, _)) => i + 1
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      case (i, Markup(Markup.JOINED, _)) => i - 1
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      case (i, _) => i
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    }
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    if (forks != 0) Forked(forks)
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    else if (markup.exists(_.name == Markup.FAILED)) Failed
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    else if (markup.exists(_.name == Markup.FINISHED)) Finished
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    else Unprocessed
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  }
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}
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trait Isar_Document extends Isabelle_Process
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{
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  import Isar_Document._
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  /* commands */
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  def define_command(id: Document.Command_ID, text: String): Unit =
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    input("Isar_Document.define_command", Document.ID(id), text)
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  /* document versions */
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  def edit_version(old_id: Document.Version_ID, new_id: Document.Version_ID,
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      edits: List[Document.Edit[Document.Command_ID]])
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  {
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    val arg =
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      XML_Data.make_list(
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        XML_Data.make_pair(XML_Data.make_string)(
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          XML_Data.make_option(XML_Data.make_list(
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              XML_Data.make_pair(
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                XML_Data.make_option(XML_Data.make_long))(
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                XML_Data.make_option(XML_Data.make_long))))))(edits)
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    input("Isar_Document.edit_version",
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      Document.ID(old_id), Document.ID(new_id), YXML.string_of_body(arg))
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  }
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}