src/Tools/jEdit/src/jedit/plugin.scala
author wenzelm
Thu, 31 Dec 2009 00:38:15 +0100
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basic setup for synchronous / modal (!) prover startup;
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/*
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 * Main Isabelle/jEdit plugin setup
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 *
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 * @author Johannes Hölzl, TU Munich
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 * @author Fabian Immler, TU Munich
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 * @author Makarius
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 */
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package isabelle.jedit
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import isabelle.proofdocument.Session
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import java.io.{FileInputStream, IOException}
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import java.awt.Font
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import javax.swing.JScrollPane
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import scala.collection.mutable
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import org.gjt.sp.jedit.{jEdit, EBMessage, EBPlugin, Buffer, EditPane, ServiceManager, View}
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import org.gjt.sp.jedit.buffer.JEditBuffer
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import org.gjt.sp.jedit.textarea.JEditTextArea
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import org.gjt.sp.jedit.msg.{EditPaneUpdate, PropertiesChanged}
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import org.gjt.sp.jedit.gui.EnhancedDialog
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object Isabelle
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{
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  /* plugin instance */
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  var plugin: Plugin = null
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  var system: Isabelle_System = null
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  var session: Session = null
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  /* name */
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  val NAME = "Isabelle"
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  /* properties */
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  val OPTION_PREFIX = "options.isabelle."
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  object Property
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  {
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    def apply(name: String): String = jEdit.getProperty(OPTION_PREFIX + name)
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    def update(name: String, value: String) = jEdit.setProperty(OPTION_PREFIX + name, value)
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  }
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  object Boolean_Property
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  {
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    def apply(name: String): Boolean = jEdit.getBooleanProperty(OPTION_PREFIX + name)
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    def update(name: String, value: Boolean) = jEdit.setBooleanProperty(OPTION_PREFIX + name, value)
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  }
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  object Int_Property
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  {
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    def apply(name: String): Int = jEdit.getIntegerProperty(OPTION_PREFIX + name)
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    def update(name: String, value: Int) = jEdit.setIntegerProperty(OPTION_PREFIX + name, value)
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  }
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  /* settings */
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  def default_logic(): String =
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  {
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    val logic = system.getenv("JEDIT_LOGIC")
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    if (logic != "") logic
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    else system.getenv_strict("ISABELLE_LOGIC")
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  }
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  def isabelle_args(): List[String] =
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  {
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    val modes = system.getenv("JEDIT_PRINT_MODE").split(",").toList.map("-m" + _)
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    val logic = {
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      val logic = Property("logic")
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      if (logic != null && logic != "") logic
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      else default_logic()
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    }
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    modes ++ List(logic)
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  }
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  /* main jEdit components */  // FIXME ownership!?
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  def jedit_buffers(): Iterator[Buffer] = Iterator.fromArray(jEdit.getBuffers())
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  def jedit_views(): Iterator[View] = Iterator.fromArray(jEdit.getViews())
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  def jedit_text_areas(view: View): Iterator[JEditTextArea] =
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    Iterator.fromArray(view.getEditPanes).map(_.getTextArea)
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  def jedit_text_areas(): Iterator[JEditTextArea] =
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    jedit_views().flatMap(jedit_text_areas(_))
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  def jedit_text_areas(buffer: JEditBuffer): Iterator[JEditTextArea] =
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    jedit_text_areas().filter(_.getBuffer == buffer)
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  /* manage prover */
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  private def prover_started(view: View): Boolean =
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  {
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    val timeout = Int_Property("startup-timeout") max 1000
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    session.start(timeout, Isabelle.isabelle_args()) match {
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      case Some(err) =>
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        // FIXME proper dialog
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        val dialog = new EnhancedDialog(view, "Failed to start prover:\n" + err, true) {
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          def ok { dispose }
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          def cancel { dispose }
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        }
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        dialog.setVisible(true)
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        false
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      case None => true
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    }
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  }
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  /* activation */
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  def activate_buffer(view: View, buffer: Buffer)
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  {
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    if (prover_started(view)) {
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      val model = Document_Model.init(session, buffer)
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      for (text_area <- jedit_text_areas(buffer))
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        Document_View.init(model, text_area)
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    }
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  }
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  def deactivate_buffer(buffer: Buffer)
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  {
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    session.stop()  // FIXME not yet
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    for (text_area <- jedit_text_areas(buffer))
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      Document_View.exit(text_area)
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    Document_Model.exit(buffer)
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  }
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  def switch_active(view: View) =
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  {
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    val buffer = view.getBuffer
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    if (Document_Model(buffer).isDefined) deactivate_buffer(buffer)
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    else activate_buffer(view, buffer)
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  }
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  def is_active(view: View): Boolean =
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    Document_Model(view.getBuffer).isDefined
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}
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class Plugin extends EBPlugin
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{
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  /* main plugin plumbing */
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  override def handleMessage(message: EBMessage)
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  {
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    message match {
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      case msg: EditPaneUpdate =>
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        val edit_pane = msg.getEditPane
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        val buffer = edit_pane.getBuffer
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        val text_area = edit_pane.getTextArea
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        def init_view()
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        {
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          Document_Model(buffer) match {
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            case Some(model) => Document_View.init(model, text_area)
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            case None =>
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          }
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        }
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        def exit_view()
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        {
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          if (Document_View(text_area).isDefined)
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            Document_View.exit(text_area)
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        }
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        msg.getWhat match {
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          case EditPaneUpdate.BUFFER_CHANGED => exit_view(); init_view()
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          case EditPaneUpdate.CREATED => init_view()
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          case EditPaneUpdate.DESTROYED => exit_view()
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          case _ =>
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        }
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      case msg: PropertiesChanged =>
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        Isabelle.session.global_settings.event(Session.Global_Settings)
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      case _ =>
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    }
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  }
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  override def start()
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  {
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    Isabelle.plugin = this
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    Isabelle.system = new Isabelle_System
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    Isabelle.system.install_fonts()
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    Isabelle.session = new Session(Isabelle.system)  // FIXME dialog!?
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  }
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  override def stop()
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  {
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    Isabelle.session.stop()  // FIXME dialog!?
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    Isabelle.session = null
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    Isabelle.system = null
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    Isabelle.plugin = null
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  }
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}