src/Tools/jEdit/src/session_dockable.scala

default style for user fonts -- to prevent org.gjt.sp.jedit.print.BufferPrintable from choking on null;

/*  Title:      Tools/jEdit/src/session_dockable.scala
    Author:     Makarius

Dockable window for prover session management.
*/

package isabelle.jedit


import isabelle._

import scala.actors.Actor._
import scala.swing.{FlowPanel, Button, TextArea, Label, ScrollPane, TabbedPane, Component, Swing}
import scala.swing.event.{ButtonClicked, SelectionChanged}

import java.lang.System
import java.awt.BorderLayout
import javax.swing.border.{BevelBorder, SoftBevelBorder}

import org.gjt.sp.jedit.View


class Session_Dockable(view: View, position: String) extends Dockable(view: View, position: String)
{
  /* main tabs */

  private val readme = new HTML_Panel("SansSerif", 14)
  readme.render_document(Isabelle_System.try_read(List(Path.explode("$JEDIT_HOME/README.html"))))

  private val syslog = new TextArea(Isabelle.session.syslog())

  private val tabs = new TabbedPane {
    pages += new TabbedPane.Page("README", Component.wrap(readme))
    pages += new TabbedPane.Page("System log", new ScrollPane(syslog))

    selection.index =
    {
      val index = Isabelle.Int_Property("session-panel.selection", 0)
      if (index >= pages.length) 0 else index
    }
    listenTo(selection)
    reactions += {
      case SelectionChanged(_) =>
        Isabelle.Int_Property("session-panel.selection") = selection.index
    }
  }

  set_content(tabs)


  /* controls */

  val session_phase = new Label(Isabelle.session.phase.toString)
  session_phase.border = new SoftBevelBorder(BevelBorder.LOWERED)
  session_phase.tooltip = "Prover status"

  private val logic = Isabelle.logic_selector(Isabelle.Property("logic"))
  logic.listenTo(logic.selection)
  logic.reactions += {
    case SelectionChanged(_) => Isabelle.Property("logic") = logic.selection.item.name
  }

  private val controls = new FlowPanel(FlowPanel.Alignment.Right)(session_phase, logic)
  add(controls.peer, BorderLayout.NORTH)


  /* main actor */

  private val main_actor = actor {
    loop {
      react {
        case input: Isabelle_Process.Input =>

        case result: Isabelle_Process.Result =>
          if (result.is_syslog)
            Swing_Thread.now {
              val text = Isabelle.session.syslog()
              if (text != syslog.text) {
                syslog.text = text
              }
            }

        case phase: Session.Phase =>
          Swing_Thread.now { session_phase.text = " " + phase.toString + " " }

        case bad => System.err.println("Session_Dockable: ignoring bad message " + bad)
      }
    }
  }

  override def init() {
    Isabelle.session.raw_messages += main_actor
    Isabelle.session.phase_changed += main_actor
  }

  override def exit() {
    Isabelle.session.raw_messages -= main_actor
    Isabelle.session.phase_changed -= main_actor
  }
}