src/Tools/jEdit/src/jedit/output_dockable.scala

class Session models full session, with or without prover process (cf. heaps, browser_info);
replaced Prover by Session, with a singleton instance in Isabelle plugin (shared by all active buffers);
misc cleanup of Session vs. Plugin instance;
eliminated Prover_Setup -- maintain mapping of JEditBuffer <-> Theory_View directly;
misc tuning and simplification;

/*
 * Dockable window with result message output
 *
 * @author Makarius
 */

package isabelle.jedit


import isabelle.proofdocument.{Command, HTML_Panel}

import scala.actors.Actor._

import javax.swing.JPanel
import java.awt.{BorderLayout, Dimension}

import org.gjt.sp.jedit.View
import org.gjt.sp.jedit.gui.DockableWindowManager



class Output_Dockable(view: View, position: String) extends JPanel
{
  /* outer panel */

  if (position == DockableWindowManager.FLOATING)
    setPreferredSize(new Dimension(500, 250))

  setLayout(new BorderLayout)


  /* HTML panel */

  private val html_panel =
    new HTML_Panel(Isabelle.system, Isabelle.Int_Property("font-size"), null)
  add(html_panel, BorderLayout.CENTER)


  /* actor wiring */

  private val output_actor = actor {
    loop {
      react {
        case cmd: Command =>
          Isabelle.plugin.theory_view(view.getBuffer)  // FIXME total!?!
          match {
            case None =>
            case Some(theory_view) =>
              val body =
                if (cmd == null) Nil  // FIXME ??
                else cmd.results(theory_view.current_document)
              html_panel.render(body)
          }
          
        case bad => System.err.println("output_actor: ignoring bad message " + bad)
      }
    }
  }

  private val properties_actor = actor {
    loop {
      react {
        case _: Unit => html_panel.init(Isabelle.Int_Property("font-size"))
        case bad => System.err.println("properties_actor: ignoring bad message " + bad)
      }
    }
  }

  override def addNotify()
  {
    super.addNotify()
    Isabelle.session.results += output_actor
    Isabelle.session.global_settings += properties_actor
  }

  override def removeNotify()
  {
    Isabelle.session.results -= output_actor
    Isabelle.session.global_settings -= properties_actor
    super.removeNotify()
  }
}