src/Tools/jEdit/src/jedit/Plugin.scala
author wenzelm
Tue, 21 Oct 2008 22:28:58 +0200
changeset 34337 5d5b69f2956b
parent 34318 c13e168a8ae6
child 34406 f81cd75ae331
permissions -rw-r--r--
renamed VFS protocol prefix from "isa:" to "isabelle:";
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package isabelle.jedit
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import java.awt.Font
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import java.io.{ FileInputStream, IOException }
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import isabelle.utils.EventSource
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import isabelle.prover.{ Prover, Command }
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import isabelle.IsabelleSystem
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import org.gjt.sp.jedit.{ jEdit, EBMessage, EBPlugin, Buffer, EditPane, View }
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import org.gjt.sp.jedit.msg.{ EditPaneUpdate, PropertiesChanged }
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object Plugin {
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  val NAME = "Isabelle"
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  val OPTION_PREFIX = "options.isabelle."
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  val VFS_PREFIX = "isabelle:"
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  def property(name : String) = jEdit.getProperty(OPTION_PREFIX + name)
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  def property(name : String, value : String) = 
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    jEdit.setProperty(OPTION_PREFIX + name, value)
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  var plugin : Plugin = null
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}
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class Plugin extends EBPlugin {
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  import Plugin._
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  val prover = new Prover()
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  var theoryView : TheoryView = null
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  var viewFont : Font = null 
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  val viewFontChanged = new EventSource[Font]
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  private var _selectedState : Command = null
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  val stateUpdate = new EventSource[Command]
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  def selectedState = _selectedState
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  def selectedState_=(newState : Command) {
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    _selectedState = newState
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    stateUpdate fire newState
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  }
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  def activate(view : View) {
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    val logic = property("logic")
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    theoryView = new TheoryView(prover, view.getBuffer())
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    prover.start(if (logic == null) logic else "HOL")
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    val dir = view.getBuffer().getDirectory()
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    prover.setDocument(theoryView, 
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                       if (dir.startsWith(VFS_PREFIX)) dir.substring(VFS_PREFIX.length) else dir)
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    TheoryView.activateTextArea(view.getTextArea())
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  }
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  override def handleMessage(msg : EBMessage) = msg match {
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    case epu : EditPaneUpdate => epu.getWhat() match {
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      case EditPaneUpdate.BUFFER_CHANGED =>
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        TheoryView.activateTextArea(epu.getEditPane().getTextArea())
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      case EditPaneUpdate.BUFFER_CHANGING =>
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        TheoryView.deactivateTextArea(epu.getEditPane().getTextArea())
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      case _ =>
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    }
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    case _ =>
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  }
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  def setFont(path : String, size : Float) {
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    try {
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      val fontStream = new FileInputStream(path)
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      val font = Font.createFont(Font.TRUETYPE_FONT, fontStream)
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      viewFont = font.deriveFont(Font.PLAIN, size)
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      viewFontChanged.fire(viewFont)
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    }
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    catch {
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      case e : IOException =>
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    }
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  }
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  override def start() {
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    plugin = this
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    if (property("font-path") != null && property("font-size") != null)
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      try {
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        setFont(property("font-path"), property("font-size").toFloat)
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      }
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      catch {
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        case e : NumberFormatException =>
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      }
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  }
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  override def stop() {
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    // TODO: implement cleanup
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  }
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}