src/Tools/jEdit/src/output2_dockable.scala

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/src/Tools/jEdit/src/output2_dockable.scala	Sun Sep 16 20:16:28 2012 +0200
@@ -0,0 +1,160 @@
+/*  Title:      Tools/jEdit/src/output2_dockable.scala
+    Author:     Makarius
+
+Dockable window with result message output.
+*/
+
+package isabelle.jedit
+
+
+import isabelle._
+
+import scala.actors.Actor._
+
+import scala.swing.{FlowPanel, Button, CheckBox}
+import scala.swing.event.ButtonClicked
+
+import java.lang.System
+import java.awt.BorderLayout
+import java.awt.event.{ComponentEvent, ComponentAdapter}
+
+import org.gjt.sp.jedit.View
+
+
+class Output2_Dockable(view: View, position: String) extends Dockable(view, position)
+{
+  Swing_Thread.require()
+
+
+  /* component state -- owned by Swing thread */
+
+  private var zoom_factor = 100
+  private var show_tracing = false
+  private var do_update = true
+  private var current_state = Command.empty.empty_state
+  private var current_body: XML.Body = Nil
+
+
+  /* pretty text panel */
+
+  private val pretty_text_area = new Pretty_Text_Area
+  set_content(pretty_text_area)
+
+
+  private def handle_resize()
+  {
+    Swing_Thread.require()
+
+    pretty_text_area.resize(Isabelle.font_family(),
+      scala.math.round(Isabelle.font_size() * zoom_factor / 100))
+  }
+
+  private def handle_update(follow: Boolean, restriction: Option[Set[Command]])
+  {
+    Swing_Thread.require()
+
+    val new_state =
+      if (follow) {
+        Document_View(view.getTextArea) match {
+          case Some(doc_view) =>
+            val snapshot = doc_view.model.snapshot()
+            snapshot.node.command_at(doc_view.text_area.getCaretPosition).map(_._1) match {
+              case Some(cmd) => snapshot.state.command_state(snapshot.version, cmd)
+              case None => Command.empty.empty_state
+            }
+          case None => Command.empty.empty_state
+        }
+      }
+      else current_state
+
+    val new_body =
+      if (!restriction.isDefined || restriction.get.contains(new_state.command))
+        new_state.results.iterator.map(_._2).filter(
+        { // FIXME not scalable
+          case XML.Elem(Markup(Isabelle_Markup.TRACING, _), _) => show_tracing
+          case _ => true
+        }).toList
+      else current_body
+
+    if (new_body != current_body) pretty_text_area.update(new_body)
+
+    current_state = new_state
+    current_body = new_body
+  }
+
+
+  /* main actor */
+
+  private val main_actor = actor {
+    loop {
+      react {
+        case Session.Global_Settings =>
+          Swing_Thread.later { handle_resize() }
+        case changed: Session.Commands_Changed =>
+          Swing_Thread.later { handle_update(do_update, Some(changed.commands)) }
+        case Session.Caret_Focus =>
+          Swing_Thread.later { handle_update(do_update, None) }
+        case bad => System.err.println("Output_Dockable: ignoring bad message " + bad)
+      }
+    }
+  }
+
+  override def init()
+  {
+    Swing_Thread.require()
+
+    Isabelle.session.global_settings += main_actor
+    Isabelle.session.commands_changed += main_actor
+    Isabelle.session.caret_focus += main_actor
+    handle_update(true, None)
+  }
+
+  override def exit()
+  {
+    Swing_Thread.require()
+
+    Isabelle.session.global_settings -= main_actor
+    Isabelle.session.commands_changed -= main_actor
+    Isabelle.session.caret_focus -= main_actor
+    delay_resize.revoke()
+  }
+
+
+  /* resize */
+
+  private val delay_resize =
+    Swing_Thread.delay_first(
+      Time.seconds(Isabelle.options.real("editor_update_delay"))) { handle_resize() }
+
+  addComponentListener(new ComponentAdapter {
+    override def componentResized(e: ComponentEvent) { delay_resize.invoke() }
+  })
+
+
+  /* controls */
+
+  private val zoom = new Library.Zoom_Box(factor => { zoom_factor = factor; handle_resize() })
+  zoom.tooltip = "Zoom factor for basic font size"
+
+  private val tracing = new CheckBox("Tracing") {
+    reactions += {
+      case ButtonClicked(_) => show_tracing = this.selected; handle_update(do_update, None) }
+  }
+  tracing.selected = show_tracing
+  tracing.tooltip = "Indicate output of tracing messages"
+
+  private val auto_update = new CheckBox("Auto update") {
+    reactions += {
+      case ButtonClicked(_) => do_update = this.selected; handle_update(do_update, None) }
+  }
+  auto_update.selected = do_update
+  auto_update.tooltip = "Indicate automatic update following cursor movement"
+
+  private val update = new Button("Update") {
+    reactions += { case ButtonClicked(_) => handle_update(true, None) }
+  }
+  update.tooltip = "Update display according to the command at cursor position"
+
+  private val controls = new FlowPanel(FlowPanel.Alignment.Right)(zoom, tracing, auto_update, update)
+  add(controls.peer, BorderLayout.NORTH)
+}