src/Tools/jEdit/src/output_dockable.scala

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/src/Tools/jEdit/src/output_dockable.scala	Wed Jun 08 17:42:07 2011 +0200
@@ -0,0 +1,163 @@
+/*  Title:      Tools/jEdit/src/output_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.awt.BorderLayout
+import java.awt.event.{ComponentEvent, ComponentAdapter}
+
+import org.gjt.sp.jedit.View
+
+
+class Output_Dockable(view: View, position: String) extends Dockable(view, position)
+{
+  Swing_Thread.require()
+
+  private val html_panel =
+    new HTML_Panel(Isabelle.system, Isabelle.font_family(), scala.math.round(Isabelle.font_size()))
+  {
+    override val handler: PartialFunction[HTML_Panel.Event, Unit] = {
+      case HTML_Panel.Mouse_Click(elem, event) if elem.getClassName() == "sendback" =>
+        val text = elem.getFirstChild().getNodeValue()
+
+        Document_View(view.getTextArea) match {
+          case Some(doc_view) =>
+            val cmd = current_command.get
+            val start_ofs = doc_view.model.snapshot().node.command_start(cmd).get
+            val buffer = view.getBuffer
+            buffer.beginCompoundEdit()
+            buffer.remove(start_ofs, cmd.length)
+            buffer.insert(start_ofs, text)
+            buffer.endCompoundEdit()
+          case None =>
+        }
+    }       
+  }
+
+  set_content(html_panel)
+
+
+  /* component state -- owned by Swing thread */
+
+  private var zoom_factor = 100
+  private var show_tracing = false
+  private var follow_caret = true
+  private var current_command: Option[Command] = None
+
+
+  private def handle_resize()
+  {
+    Swing_Thread.now {
+      html_panel.resize(Isabelle.font_family(),
+        scala.math.round(Isabelle.font_size() * zoom_factor / 100))
+    }
+  }
+
+  private def handle_perspective(): Boolean =
+    Swing_Thread.now {
+      Document_View(view.getTextArea) match {
+        case Some(doc_view) =>
+          val cmd = doc_view.selected_command()
+          if (current_command == cmd) false
+          else { current_command = cmd; true }
+        case None => false
+      }
+    }
+
+  private def handle_update(restriction: Option[Set[Command]] = None)
+  {
+    Swing_Thread.now {
+      if (follow_caret) handle_perspective()
+      Document_View(view.getTextArea) match {
+        case Some(doc_view) =>
+          current_command match {
+            case Some(cmd) if !restriction.isDefined || restriction.get.contains(cmd) =>
+              val snapshot = doc_view.model.snapshot()
+              val filtered_results =
+                snapshot.state(cmd).results.iterator.map(_._2) filter {
+                  case XML.Elem(Markup(Markup.TRACING, _), _) => show_tracing  // FIXME not scalable
+                  case _ => true
+                }
+              html_panel.render(filtered_results.toList)
+            case _ =>
+          }
+        case None =>
+      }
+    }
+  }
+
+
+  /* main actor */
+
+  private val main_actor = actor {
+    loop {
+      react {
+        case Session.Global_Settings => handle_resize()
+        case Session.Commands_Changed(changed) => handle_update(Some(changed))
+        case Session.Perspective => if (follow_caret && handle_perspective()) handle_update()
+        case bad => System.err.println("Output_Dockable: ignoring bad message " + bad)
+      }
+    }
+  }
+
+  override def init()
+  {
+    Isabelle.session.global_settings += main_actor
+    Isabelle.session.commands_changed += main_actor
+    Isabelle.session.perspective += main_actor
+  }
+
+  override def exit()
+  {
+    Isabelle.session.global_settings -= main_actor
+    Isabelle.session.commands_changed -= main_actor
+    Isabelle.session.perspective -= main_actor
+  }
+
+
+  /* resize */
+
+  addComponentListener(new ComponentAdapter {
+    val delay = Swing_Thread.delay_last(Isabelle.session.update_delay) { handle_resize() }
+    override def componentResized(e: ComponentEvent) { delay() }
+  })
+
+
+  /* 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() }
+  }
+  tracing.selected = show_tracing
+  tracing.tooltip = "Indicate output of tracing messages"
+
+  private val auto_update = new CheckBox("Auto update") {
+    reactions += { case ButtonClicked(_) => follow_caret = this.selected; handle_update() }
+  }
+  auto_update.selected = follow_caret
+  auto_update.tooltip = "Indicate automatic update following cursor movement"
+
+  private val update = new Button("Update") {
+    reactions += { case ButtonClicked(_) => handle_perspective(); handle_update() }
+  }
+  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)
+
+  handle_update()
+}