src/Tools/jEdit/src/plugin.scala
author wenzelm
Mon, 28 Apr 2014 15:29:09 +0200
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/*  Title:      Tools/jEdit/src/plugin.scala
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    Author:     Makarius
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Main plumbing for PIDE infrastructure as jEdit plugin.
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*/
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package isabelle.jedit
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import isabelle._
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import javax.swing.JOptionPane
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import scala.swing.{ListView, ScrollPane}
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import org.gjt.sp.jedit.{jEdit, EBMessage, EBPlugin, Buffer, View, Debug}
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import org.jedit.options.CombinedOptions
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import org.gjt.sp.jedit.gui.AboutDialog
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import org.gjt.sp.jedit.textarea.{JEditTextArea, TextArea}
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import org.gjt.sp.jedit.syntax.ModeProvider
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import org.gjt.sp.jedit.msg.{EditorStarted, BufferUpdate, EditPaneUpdate, PropertiesChanged}
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import org.gjt.sp.util.SyntaxUtilities
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object PIDE
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{
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  /* plugin instance */
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  val options = new JEdit_Options
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  val completion_history = new Completion.History_Variable
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  val spell_checker = new Spell_Checker_Variable
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  @volatile var startup_failure: Option[Throwable] = None
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  @volatile var startup_notified = false
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  @volatile var plugin: Plugin = null
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  @volatile var session: Session = new Session(new JEdit_Resources(Set.empty, Outer_Syntax.empty))
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  def options_changed() { plugin.options_changed() }
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  def deps_changed() { plugin.deps_changed() }
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  def resources(): JEdit_Resources =
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    session.resources.asInstanceOf[JEdit_Resources]
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  lazy val editor = new JEdit_Editor
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  /* popups */
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  def dismissed_popups(view: View): Boolean =
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  {
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    var dismissed = false
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    JEdit_Lib.jedit_text_areas(view).foreach(text_area =>
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      if (Completion_Popup.Text_Area.dismissed(text_area)) dismissed = true)
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    if (Pretty_Tooltip.dismissed_all()) dismissed = true
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    dismissed
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  }
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  /* document model and view */
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  def document_model(buffer: Buffer): Option[Document_Model] = Document_Model(buffer)
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  def document_view(text_area: TextArea): Option[Document_View] = Document_View(text_area)
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  def document_views(buffer: Buffer): List[Document_View] =
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    for {
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      text_area <- JEdit_Lib.jedit_text_areas(buffer).toList
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      doc_view <- document_view(text_area)
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    } yield doc_view
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  def document_models(): List[Document_Model] =
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    for {
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      buffer <- JEdit_Lib.jedit_buffers().toList
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      model <- document_model(buffer)
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    } yield model
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  def document_blobs(): Document.Blobs =
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    Document.Blobs(
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      (for {
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        buffer <- JEdit_Lib.jedit_buffers()
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        model <- document_model(buffer)
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        blob <- model.get_blob()
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      } yield (model.node_name -> blob)).toMap)
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  def exit_models(buffers: List[Buffer])
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  {
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    Swing_Thread.now {
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      PIDE.editor.flush()
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      buffers.foreach(buffer =>
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        JEdit_Lib.buffer_lock(buffer) {
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          JEdit_Lib.jedit_text_areas(buffer).foreach(Document_View.exit)
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          Document_Model.exit(buffer)
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        })
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      }
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  }
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  def init_models()
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  {
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    Swing_Thread.now {
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      PIDE.editor.flush()
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      for {
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        buffer <- JEdit_Lib.jedit_buffers()
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        if buffer != null && !buffer.isLoading && !buffer.getBooleanProperty(Buffer.GZIPPED)
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      } {
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        JEdit_Lib.buffer_lock(buffer) {
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          val node_name = resources.node_name(buffer)
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          val model =
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            document_model(buffer) match {
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              case Some(model) if model.node_name == node_name => model
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              case _ => Document_Model.init(session, buffer, node_name)
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            }
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          for {
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            text_area <- JEdit_Lib.jedit_text_areas(buffer)
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            if document_view(text_area).map(_.model) != Some(model)
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          } Document_View.init(model, text_area)
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        }
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      }
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      PIDE.editor.invoke()
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    }
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  }
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  def init_view(buffer: Buffer, text_area: JEditTextArea): Unit =
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    Swing_Thread.now {
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      JEdit_Lib.buffer_lock(buffer) {
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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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    }
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  def exit_view(buffer: Buffer, text_area: JEditTextArea): Unit =
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    Swing_Thread.now {
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      JEdit_Lib.buffer_lock(buffer) {
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        Document_View.exit(text_area)
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      }
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    }
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  /* current document content */
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  def snapshot(view: View): Document.Snapshot =
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  {
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    val buffer = view.getBuffer
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    document_model(buffer) match {
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      case Some(model) => model.snapshot
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      case None => error("No document model for current buffer")
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    }
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  }
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  def rendering(view: View): Rendering =
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  {
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    val text_area = view.getTextArea
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    document_view(text_area) match {
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      case Some(doc_view) => doc_view.get_rendering()
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      case None => error("No document view for current text area")
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    }
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  }
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}
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class Plugin extends EBPlugin
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{
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  /* global changes */
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  def options_changed()
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  {
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    PIDE.session.global_options.post(Session.Global_Options(PIDE.options.value))
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    delay_load.invoke()
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  }
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  def deps_changed()
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  {
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    delay_load.invoke()
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  }
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  /* theory files */
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  private lazy val delay_init =
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    Swing_Thread.delay_last(PIDE.options.seconds("editor_load_delay"))
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    {
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      PIDE.init_models()
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    }
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  private lazy val delay_load =
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    Swing_Thread.delay_last(PIDE.options.seconds("editor_load_delay"))
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    {
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      if (Isabelle.continuous_checking) {
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        val view = jEdit.getActiveView()
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        val buffers = JEdit_Lib.jedit_buffers().toList
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        if (buffers.forall(_.isLoaded)) {
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          def loaded_buffer(name: String): Boolean =
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            buffers.exists(buffer => JEdit_Lib.buffer_name(buffer) == name)
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          val thys =
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            for {
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              buffer <- buffers
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              model <- PIDE.document_model(buffer)
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              if model.is_theory
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            } yield (model.node_name, Position.none)
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          val thy_info = new Thy_Info(PIDE.resources)
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          // FIXME avoid I/O in Swing thread!?!
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          val files = thy_info.dependencies(thys).deps.map(_.name.node).
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            filter(file => !loaded_buffer(file) && PIDE.resources.check_file(view, file))
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          if (!files.isEmpty) {
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            if (PIDE.options.bool("jedit_auto_load")) {
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              files.foreach(file => jEdit.openFile(null: View, file))
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            }
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            else {
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              val files_list = new ListView(files.sorted)
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              for (i <- 0 until files.length)
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                files_list.selection.indices += i
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              val answer =
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                GUI.confirm_dialog(view,
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                  "Auto loading of required files",
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                  JOptionPane.YES_NO_OPTION,
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                  "The following files are required to resolve theory imports.",
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                  "Reload selected files now?",
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                  new ScrollPane(files_list),
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                  new Isabelle.Continuous_Checking)
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              if (answer == 0) {
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                files.foreach(file =>
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                  if (files_list.selection.items.contains(file))
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                    jEdit.openFile(null: View, file))
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              }
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            }
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          }
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        }
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      }
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    }
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  /* session phase */
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  private val session_phase =
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    Session.Consumer[Session.Phase](getClass.getName) {
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      case Session.Inactive | Session.Failed =>
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        Swing_Thread.later {
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          GUI.error_dialog(jEdit.getActiveView, "Prover process terminated",
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              "Isabelle Syslog", GUI.scrollable_text(PIDE.session.current_syslog()))
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        }
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      case Session.Ready =>
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        PIDE.session.update_options(PIDE.options.value)
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        PIDE.init_models()
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        delay_load.invoke()
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      case Session.Shutdown =>
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        PIDE.exit_models(JEdit_Lib.jedit_buffers().toList)
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        delay_load.revoke()
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      case _ =>
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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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    Swing_Thread.assert {}
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    if (PIDE.startup_failure.isDefined && !PIDE.startup_notified) {
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      message match {
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        case msg: EditorStarted =>
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          GUI.error_dialog(null, "Isabelle plugin startup failure",
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            GUI.scrollable_text(Exn.message(PIDE.startup_failure.get)),
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            "Prover IDE inactive!")
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          PIDE.startup_notified = true
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        case _ =>
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      }
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    }
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    if (PIDE.startup_failure.isEmpty) {
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      message match {
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        case msg: EditorStarted =>
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          PIDE.session.start("Isabelle", Isabelle_Logic.session_args())
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        case msg: BufferUpdate
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        if msg.getWhat == BufferUpdate.LOADED || msg.getWhat == BufferUpdate.PROPERTIES_CHANGED =>
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          if (PIDE.session.is_ready) {
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            delay_init.invoke()
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            delay_load.invoke()
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          }
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        case msg: EditPaneUpdate
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        if (msg.getWhat == EditPaneUpdate.BUFFER_CHANGING ||
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            msg.getWhat == EditPaneUpdate.BUFFER_CHANGED ||
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            msg.getWhat == EditPaneUpdate.CREATED ||
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            msg.getWhat == EditPaneUpdate.DESTROYED) =>
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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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          if (buffer != null && text_area != null) {
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            if (msg.getWhat == EditPaneUpdate.BUFFER_CHANGED ||
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                msg.getWhat == EditPaneUpdate.CREATED) {
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              if (PIDE.session.is_ready)
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                PIDE.init_view(buffer, text_area)
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            }
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            else {
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              PIDE.dismissed_popups(text_area.getView)
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              PIDE.exit_view(buffer, text_area)
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            }
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            if (msg.getWhat == EditPaneUpdate.CREATED)
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              Completion_Popup.Text_Area.init(text_area)
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            if (msg.getWhat == EditPaneUpdate.DESTROYED)
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              Completion_Popup.Text_Area.exit(text_area)
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          }
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        case msg: PropertiesChanged =>
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          PIDE.spell_checker.update(PIDE.options.value)
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          PIDE.session.update_options(PIDE.options.value)
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        case _ =>
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      }
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    }
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  }
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  override def start()
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  {
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    try {
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      Debug.DISABLE_SEARCH_DIALOG_POOL = true
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      PIDE.plugin = this
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      Isabelle_System.init()
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      Isabelle_Font.install_fonts()
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      PIDE.options.update(Options.init())
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      PIDE.completion_history.load()
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      PIDE.spell_checker.update(PIDE.options.value)
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      SyntaxUtilities.setStyleExtender(new Token_Markup.Style_Extender)
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      if (ModeProvider.instance.isInstanceOf[ModeProvider])
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        ModeProvider.instance = new Token_Markup.Mode_Provider(ModeProvider.instance)
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      JEdit_Lib.jedit_text_areas.foreach(Completion_Popup.Text_Area.init _)
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49246
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      val content = Isabelle_Logic.session_content(false)
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      val resources = new JEdit_Resources(content.loaded_theories, content.syntax)
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      PIDE.session = new Session(resources) {
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        override def output_delay = PIDE.options.seconds("editor_output_delay")
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        override def reparse_limit = PIDE.options.int("editor_reparse_limit")
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      }
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      PIDE.session.phase_changed += session_phase
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      PIDE.startup_failure = None
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    }
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    catch {
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   364
      case exn: Throwable =>
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        PIDE.startup_failure = Some(exn)
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        PIDE.startup_notified = false
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    }
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  }
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   369
39628
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  override def stop()
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  {
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    JEdit_Lib.jedit_text_areas.foreach(Completion_Popup.Text_Area.exit _)
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   373
53337
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   374
    if (PIDE.startup_failure.isEmpty) {
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   375
      PIDE.options.value.save_prefs()
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      PIDE.completion_history.value.save()
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    }
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   379
    PIDE.session.phase_changed -= session_phase
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   380
    PIDE.exit_models(JEdit_Lib.jedit_buffers().toList)
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   381
    PIDE.session.stop()
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  }
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}