src/Tools/jEdit/src/prover/MarkupNode.scala

superficial tuning;

/*
 * Document markup nodes, with connection to Swing tree model
 *
 * @author Fabian Immler, TU Munich
 */

package isabelle.prover

import isabelle.proofdocument.ProofDocument

import sidekick.IAsset
import javax.swing._
import javax.swing.text.Position
import javax.swing.tree._

abstract class MarkupInfo
case class RootInfo() extends MarkupInfo
case class OuterInfo(highlight: String) extends
  MarkupInfo { override def toString = highlight }
case class HighlightInfo(highlight: String) extends
  MarkupInfo { override def toString = highlight }
case class TypeInfo(type_kind: String) extends
  MarkupInfo { override def toString = type_kind }
case class RefInfo(file: Option[String], line: Option[Int],
  command_id: Option[String], offset: Option[Int]) extends MarkupInfo {
    override def toString = (file, line, command_id, offset).toString
  }

object MarkupNode {

  def markup2default_node(node: MarkupNode, cmd: Command, doc: ProofDocument)
      : DefaultMutableTreeNode = {

    implicit def int2pos(offset: Int): Position =
      new Position { def getOffset = offset; override def toString = offset.toString }

    object RelativeAsset extends IAsset {
      override def getIcon: Icon = null
      override def getShortString: String = node.content
      override def getLongString: String = node.info.toString
      override def getName: String = node.id
      override def setName(name: String) = ()
      override def setStart(start: Position) = ()
      override def getStart: Position = node.abs_start(doc)
      override def setEnd(end: Position) = ()
      override def getEnd: Position = node.abs_stop(doc)
      override def toString = node.id + ": " + node.content + "[" + getStart + " - " + getEnd + "]"
    }

    new DefaultMutableTreeNode(RelativeAsset)
  }
}

class MarkupNode(val base: Command, val start: Int, val stop: Int,
  val children: List[MarkupNode],
  val id: String, val content: String, val info: MarkupInfo)
{
  def swing_node(doc: ProofDocument): DefaultMutableTreeNode = {
    val node = MarkupNode.markup2default_node (this, base, doc)
    children.map(node add _.swing_node(doc))
    node
  }

  def abs_start(doc: ProofDocument) = base.start(doc) + start
  def abs_stop(doc: ProofDocument) = base.start(doc) + stop

  def set_children(newchildren: List[MarkupNode]): MarkupNode =
    new MarkupNode(base, start, stop, newchildren, id, content, info)

  def add(child: MarkupNode) =
    set_children ((child :: children) sort ((a, b) => a.start < b.start))

  def remove(nodes: List[MarkupNode]) = set_children(children diff nodes)

  def dfs: List[MarkupNode] = {
    var all = Nil : List[MarkupNode]
    for (child <- children)
      all = child.dfs ::: all
    all = this :: all
    all
  }

  def leafs: List[MarkupNode] = {
    if (children == Nil) return List(this)
    else return children flatMap (_.leafs)
  }

  def flatten: List[MarkupNode] = {
    var next_x = start
    if(children.length == 0) List(this)
    else {
      val filled_gaps = for {
        child <- children
        markups =
          if (next_x < child.start) {
            new MarkupNode(base, next_x, child.start, Nil, id, content, info) :: child.flatten
          } else child.flatten
        update = (next_x = child.stop)
        markup <- markups
      } yield markup
      if (next_x < stop)
        filled_gaps + new MarkupNode(base, next_x, stop, Nil, id, content, info)
      else filled_gaps
    }
  }

  def filter(p: MarkupNode => Boolean): List[MarkupNode] = {
    val filtered = children.flatMap(_.filter(p))
    if (p(this)) List(this set_children(filtered))
    else filtered
  }

  def +(new_child: MarkupNode): MarkupNode = {
    if (new_child fitting_into this) {
      var inserted = false
      val new_children =
        children.map(c =>
          if ((new_child fitting_into c) && !inserted) {inserted = true; c + new_child}
          else c)
      if (!inserted) {
        // new_child did not fit into children of this
        // -> insert new_child between this and its children
        val fitting = children filter(_ fitting_into new_child)
        (this remove fitting) add ((new_child /: fitting) (_ + _))
      }
      else this set_children new_children
    } else {
      error("ignored nonfitting markup " + new_child.id + new_child.content +
        new_child.info.toString + "(" +new_child.start + ", "+ new_child.stop + ")")
    }
  }

  // does this fit into node?
  def fitting_into(node: MarkupNode) = node.start <= this.start && node.stop >= this.stop

  override def toString =
    "([" + start + " - " + stop + "] " + id + "( " + content + "): " + info.toString
}