src/Tools/jEdit/src/jedit/Plugin.scala
author immler@in.tum.de
Thu Aug 27 16:41:33 2009 +0200 (2009-08-27)
changeset 34685 93f4978fe2a8
parent 34671 d179fcb04cbc
child 34692 3c0a8bece8b8
permissions -rw-r--r--
global event buses for changes concerning commands and document edits
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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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 */
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package isabelle.jedit
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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 isabelle.prover.{Prover, Command}
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import isabelle.proofdocument.ProofDocument
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import isabelle.Isabelle_System
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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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object Isabelle
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{
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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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  /* Isabelle system instance */
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  var system: Isabelle_System = null
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  def symbols = system.symbols
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  lazy val completion = new Completion + symbols
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  /* settings */
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  def default_logic =
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  {
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    val logic = Isabelle.Property("logic")
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    if (logic != null) logic else Isabelle.system.getenv_strict("ISABELLE_LOGIC")
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  }
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  /* plugin instance */
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  var plugin: Plugin = null
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  /* running provers */
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  def prover_setup(buffer: JEditBuffer) = plugin.prover_setup(buffer)
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}
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class Plugin extends EBPlugin
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{
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  /* Isabelle font */
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  var font: Font = null
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  val font_changed = new EventBus[Font]
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  def set_font(size: Int)
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  {
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    font = Font.createFont(Font.TRUETYPE_FONT,
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        Isabelle.system.platform_file("~~/lib/fonts/IsabelleMono.ttf")).
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      deriveFont(Font.PLAIN, (size max 1).toFloat)
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    font_changed.event(font)
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  }
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  /* event buses */
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  val state_update = new EventBus[Command]
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  val command_change = new EventBus[Command]
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  val document_change = new EventBus[ProofDocument]
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  /* selected state */
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  private var _selected_state: Command = null
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  def selected_state = _selected_state
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  def selected_state_=(state: Command) { _selected_state = state; state_update.event(state) }
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  /* mapping buffer <-> prover */
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  private val mapping = new mutable.HashMap[JEditBuffer, ProverSetup]
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  private def install(view: View)
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  {
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    val buffer = view.getBuffer
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    val prover_setup = new ProverSetup(buffer)
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    mapping.update(buffer, prover_setup)
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    prover_setup.activate(view)
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  }
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  private def uninstall(view: View) =
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    mapping.removeKey(view.getBuffer).get.deactivate
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  def switch_active (view: View) =
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    if (mapping.isDefinedAt(view.getBuffer)) uninstall(view)
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    else install(view)
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  def prover_setup(buffer: JEditBuffer): Option[ProverSetup] = mapping.get(buffer)
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  def is_active (buffer: JEditBuffer) = mapping.isDefinedAt(buffer)
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  /* main plugin plumbing */
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  override def handleMessage(msg: EBMessage)
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  {
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    msg match {
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      case epu: EditPaneUpdate =>
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        val buffer = epu.getEditPane.getBuffer
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        epu.getWhat match {
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          case EditPaneUpdate.BUFFER_CHANGED =>
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            (mapping get buffer) map (_.theory_view.activate)
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          case EditPaneUpdate.BUFFER_CHANGING =>
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            if (buffer != null)
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              (mapping get buffer) map (_.theory_view.deactivate)
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          case _ =>
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        }
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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.system = new Isabelle_System
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    Isabelle.plugin = this
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    set_font(Isabelle.Int_Property("font-size"))
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  }
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  override def stop()
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  {
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    // TODO: proper cleanup
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    Isabelle.system = null
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    Isabelle.plugin = null
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  }
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}