src/Tools/Graphview/src/mutator_dialog.scala

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/*  Title:      Tools/Graphview/src/mutator_dialog.scala
    Author:     Markus Kaiser, TU Muenchen

Mutator selection and configuration dialog.
*/

package isabelle.graphview


import isabelle._

import java.awt.Color
import java.awt.FocusTraversalPolicy
import javax.swing.JColorChooser
import javax.swing.border.EmptyBorder
import scala.collection.JavaConversions._
import scala.swing._
import isabelle.graphview.Mutators._
import scala.swing.event.ValueChanged


class Mutator_Dialog(
    visualizer: Visualizer,
    container: Mutator_Container,
    caption: String,
    reverse_caption: String = "Inverse",
    show_color_chooser: Boolean = true)
  extends Dialog
{
  type Mutator_Markup = (Boolean, Color, Mutator)
  
  title = caption
  
  private var _panels: List[Mutator_Panel] = Nil
  private def panels = _panels
  private def panels_= (panels: List[Mutator_Panel]) {
    _panels = panels
    paintPanels
  }

  container.events += {
    case Mutator_Event.Add(m) => addPanel(new Mutator_Panel(m))
    case Mutator_Event.NewList(ms) => panels = getPanels(ms)
  }

  override def open() {
    if (!visible)
      panels = getPanels(container())

    super.open
  }

  minimumSize = new Dimension(700, 200)
  preferredSize = new Dimension(1000, 300)
  peer.setFocusTraversalPolicy(focusTraversal)

  private def getPanels(m: List[Mutator_Markup]): List[Mutator_Panel] =
    m.filter(_ match {case (_, _, Identity()) => false; case _ => true})
    .map(m => new Mutator_Panel(m))

  private def getMutators(panels: List[Mutator_Panel]): List[Mutator_Markup] = 
    panels.map(panel => panel.get_Mutator_Markup)

  private def movePanelUp(m: Mutator_Panel) = {
    def moveUp(l: List[Mutator_Panel]): List[Mutator_Panel] = l match {
      case x :: y :: xs => if (y == m) y :: x :: xs else x :: moveUp(y :: xs)
      case _ => l
    }

    panels = moveUp(panels)
  }

  private def movePanelDown(m: Mutator_Panel) = {
    def moveDown(l: List[Mutator_Panel]): List[Mutator_Panel] = l match {
      case x :: y :: xs => if (x == m) y :: x :: xs else x :: moveDown(y :: xs)
      case _ => l
    }

    panels = moveDown(panels)
  }

  private def removePanel(m: Mutator_Panel) = {
    panels = panels.filter(_ != m).toList
  }

  private def addPanel(m: Mutator_Panel) = {
    panels = panels ::: List(m)
  }

  def paintPanels = {
    focusTraversal.clear
    filterPanel.contents.clear
    panels.map(x => {
        filterPanel.contents += x
        focusTraversal.addAll(x.focusList)
      })
    filterPanel.contents += Swing.VGlue

    focusTraversal.add(mutatorBox.peer.asInstanceOf[java.awt.Component])
    focusTraversal.add(addButton.peer)
    focusTraversal.add(applyButton.peer)
    focusTraversal.add(cancelButton.peer)
    filterPanel.revalidate
    filterPanel.repaint
  }

  val filterPanel = new BoxPanel(Orientation.Vertical) {}

  private val mutatorBox = new ComboBox[Mutator](container.available)

  private val addButton: Button = new Button{
    action = Action("Add") {
      addPanel(
        new Mutator_Panel((true, visualizer.Colors.next,
                           mutatorBox.selection.item))
      )
    }
  }

  private val applyButton = new Button{
    action = Action("Apply") {
      container(getMutators(panels))
    }
  }

  private val resetButton = new Button {
    action = Action("Reset") {
      panels = getPanels(container())
    }
  }

  private val cancelButton = new Button{
      action = Action("Close") {
        close
      }
    }
  defaultButton = cancelButton

  private val botPanel = new BoxPanel(Orientation.Horizontal) {
    border = new EmptyBorder(10, 0, 0, 0)

    contents += mutatorBox
    contents += Swing.RigidBox(new Dimension(10, 0))
    contents += addButton

    contents += Swing.HGlue
    contents += Swing.RigidBox(new Dimension(30, 0))
    contents += applyButton

    contents += Swing.RigidBox(new Dimension(5, 0))
    contents += resetButton

    contents += Swing.RigidBox(new Dimension(5, 0))
    contents += cancelButton
  }
  
  contents = new BorderPanel {
    border = new EmptyBorder(5, 5, 5, 5)

    add(new ScrollPane(filterPanel), BorderPanel.Position.Center)
    add(botPanel, BorderPanel.Position.South)
  }

  private class Mutator_Panel(initials: Mutator_Markup)
    extends BoxPanel(Orientation.Horizontal)
  {
    private val (_enabled, _color, _mutator) = initials
    
    private val inputs: List[(String, Mutator_Input_Value)] = get_Inputs()
    var focusList = List.empty[java.awt.Component]
    private val enabledBox = new iCheckBox("Enabled", _enabled)

    border = new EmptyBorder(5, 5, 5, 5)
    maximumSize = new Dimension(Integer.MAX_VALUE, 30)
    background = _color

    contents += new Label(_mutator.name) {
      preferredSize = new Dimension(175, 20)
      horizontalAlignment = Alignment.Left
      if (_mutator.description != "") tooltip = _mutator.description
    }
    contents += Swing.RigidBox(new Dimension(10, 0))
    contents += enabledBox
    contents += Swing.RigidBox(new Dimension(5, 0))
    focusList = enabledBox.peer :: focusList
    inputs.map( _ match {
      case (n, c) => {
          contents += Swing.RigidBox(new Dimension(10, 0))
        if (n != "") {
          contents += new Label(n)
          contents += Swing.RigidBox(new Dimension(5, 0))
        }
        contents += c.asInstanceOf[Component]
        
        focusList = c.asInstanceOf[Component].peer :: focusList
      }
      case _ =>
    })

    {
      val t = this
      contents += Swing.HGlue
      contents += Swing.RigidBox(new Dimension(10, 0))

      if (show_color_chooser) {
        contents += new Button {
          maximumSize = new Dimension(20, 20)

          action = Action("Color") {
            t.background =
              JColorChooser.showDialog(t.peer, "Choose new Color", t.background)
          }

          focusList = this.peer :: focusList
        }
        contents += Swing.RigidBox(new Dimension(2, 0))
      }

      contents += new Button {
        maximumSize = new Dimension(20, 20)

        action = Action("Up") {
          movePanelUp(t)
        }

        focusList = this.peer :: focusList
      }
      contents += Swing.RigidBox(new Dimension(2, 0))
      contents += new Button {
        maximumSize = new Dimension(20, 20)

        action = Action("Down") {
          movePanelDown(t)
        }

        focusList = this.peer :: focusList
      }
      contents += Swing.RigidBox(new Dimension(2, 0))
      contents += new Button {
        maximumSize = new Dimension(20, 20)

        action = Action("Del") {
          removePanel(t)
        }

        focusList = this.peer :: focusList
      }
    }

    focusList = focusList.reverse

    private def isRegex(regex: String): Boolean = {
      try {
        regex.r

        true
      } catch {
        case _: java.util.regex.PatternSyntaxException =>  false
      }
    }
   
    def get_Mutator_Markup: Mutator_Markup = {
      def regexOrElse(regex: String, orElse: String): String = {
        if (isRegex(regex)) regex
        else orElse
      }
      
      val m = _mutator match {
        case Identity() =>
          Identity()
        case Node_Expression(r, _, _, _) =>
          Node_Expression(
            regexOrElse(inputs(2)._2.getString, r),
            inputs(3)._2.getBool,
            // "Parents" means "Show parents" or "Matching Children"
            inputs(1)._2.getBool,
            inputs(0)._2.getBool
          )
        case Node_List(_, _, _, _) =>
          Node_List(
            inputs(2)._2.getString.split(',').filter(_ != "").toList,
            inputs(3)._2.getBool,
            // "Parents" means "Show parents" or "Matching Children"
            inputs(1)._2.getBool,
            inputs(0)._2.getBool
          )
        case Edge_Endpoints(_, _) =>
          Edge_Endpoints(
            inputs(0)._2.getString,
            inputs(1)._2.getString
          )
        case Add_Node_Expression(r) =>
          Add_Node_Expression(
            regexOrElse(inputs(0)._2.getString, r)
          )
        case Add_Transitive_Closure(_, _) =>
          Add_Transitive_Closure(
            inputs(0)._2.getBool,
            inputs(1)._2.getBool
          )
        case _ =>
          Identity()
      }
      
      (enabledBox.selected, background, m)
    }
    
    private def get_Inputs(): List[(String, Mutator_Input_Value)] = _mutator match {
      case Node_Expression(regex, reverse, check_parents, check_children) =>
        List(
          ("", new iCheckBox("Parents", check_children)),
          ("", new iCheckBox("Children", check_parents)),
          ("Regex", new iTextField(regex, x => !isRegex(x))),
          ("", new iCheckBox(reverse_caption, reverse))
        )
      case Node_List(list, reverse, check_parents, check_children) =>
        List(
          ("", new iCheckBox("Parents", check_children)),
          ("", new iCheckBox("Children", check_parents)),
          ("Names", new iTextField(list.mkString(","))),
          ("", new iCheckBox(reverse_caption, reverse))
        )
      case Edge_Endpoints(source, dest) =>
        List(
          ("Source", new iTextField(source)),
          ("Destination", new iTextField(dest))
        )
      case Add_Node_Expression(regex) =>
        List(
          ("Regex", new iTextField(regex, x => !isRegex(x)))
        )
      case Add_Transitive_Closure(parents, children) =>
        List(
          ("", new iCheckBox("Parents", parents)),
          ("", new iCheckBox("Children", children))
        )
      case _ => Nil
    }
  }

  private trait Mutator_Input_Value
  {
    def getString: String
    def getBool: Boolean
  }

  private class iTextField(t: String, colorator: String => Boolean)
  extends TextField(t) with Mutator_Input_Value
  {
    def this(t: String) = this(t, x => false)

    preferredSize = new Dimension(125, 18)

    reactions += {
      case ValueChanged(_) =>
          if (colorator(text))
            background = Color.RED
          else
            background = Color.WHITE
    }

    def getString = text
    def getBool = true
  }

  private class iCheckBox(t: String, s: Boolean)
  extends CheckBox(t) with Mutator_Input_Value
  {
    selected = s

    def getString = ""
    def getBool = selected
  }

  private object focusTraversal
    extends FocusTraversalPolicy
  {
    private var items = Vector[java.awt.Component]()

    def add(c: java.awt.Component) {
      items = items :+ c
    }
    def addAll(cs: TraversableOnce[java.awt.Component]) {
      items = items ++ cs
    }
    def clear() {
      items = Vector[java.awt.Component]()
    }

    def getComponentAfter(root: java.awt.Container,
                          c: java.awt.Component): java.awt.Component = {
      val i = items.indexOf(c)
      if (i < 0) {
        getDefaultComponent(root)
      } else {
        items((i + 1) % items.length)
      }
    }

    def getComponentBefore(root: java.awt.Container,
                           c: java.awt.Component): java.awt.Component = {
      val i = items.indexOf(c)
      if (i < 0) {
        getDefaultComponent(root)
      } else {
        items((i - 1) % items.length)
      }
    }

    def getFirstComponent(root: java.awt.Container): java.awt.Component = {
      if (items.length > 0)
        items(0)
      else
        null
    }

    def getDefaultComponent(root: java.awt.Container)
      : java.awt.Component = getFirstComponent(root)

    def getLastComponent(root: java.awt.Container): java.awt.Component = {
      if (items.length > 0)
        items.last
      else
        null
    }
  }
}