author | wenzelm |
Thu, 20 Sep 2012 13:34:27 +0200 | |
changeset 49467 | 25b7e843e124 |
parent 49466 | 99ed1f422635 |
child 49469 | 00c301c8d569 |
permissions | -rw-r--r-- |
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/* Title: Pure/PIDE/markup_tree.scala |
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Module: PIDE |
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Author: Fabian Immler, TU Munich |
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Author: Makarius |
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Markup trees over nested / non-overlapping text ranges. |
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*/ |
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package isabelle |
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import java.lang.System |
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import javax.swing.tree.DefaultMutableTreeNode |
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import scala.collection.immutable.SortedMap |
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import scala.annotation.tailrec |
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object Markup_Tree |
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{ |
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val empty: Markup_Tree = new Markup_Tree(Branches.empty) |
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def merge_disjoint(trees: List[Markup_Tree]): Markup_Tree = |
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trees match { |
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case Nil => empty |
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case head :: tail => |
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new Markup_Tree( |
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(head.branches /: tail) { |
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case (branches, tree) => |
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(branches /: tree.branches) { |
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case (bs, (r, entry)) => |
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require(!bs.isDefinedAt(r)) |
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bs + (r -> entry) |
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} |
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}) |
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} |
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object Entry |
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{ |
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def apply(markup: Text.Markup, subtree: Markup_Tree): Entry = |
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Entry(markup.range, List(markup.info), Set(markup.info.markup.name), subtree) |
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} |
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sealed case class Entry( |
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range: Text.Range, |
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rev_markup: List[XML.Elem], |
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elements: Set[String], |
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subtree: Markup_Tree) |
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{ |
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def + (info: XML.Elem): Entry = |
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if (elements(info.markup.name)) copy(rev_markup = info :: rev_markup) |
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else copy(rev_markup = info :: rev_markup, elements = elements + info.markup.name) |
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def markup: List[XML.Elem] = rev_markup.reverse |
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} |
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object Branches |
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{ |
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type T = SortedMap[Text.Range, Entry] |
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val empty: T = SortedMap.empty(Text.Range.Ordering) |
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} |
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/* XML representation */ |
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@tailrec private def strip_elems(markups: List[Markup], body: XML.Body): (List[Markup], XML.Body) = |
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body match { |
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case List(XML.Elem(markup1, body1)) => strip_elems(markup1 :: markups, body1) |
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case _ => (markups, body) |
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} |
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private def make_trees(acc: (Int, List[Markup_Tree]), tree: XML.Tree): (Int, List[Markup_Tree]) = |
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{ |
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val (offset, markup_trees) = acc |
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strip_elems(Nil, List(tree)) match { |
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case (Nil, body) => |
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(offset + XML.text_length(body), markup_trees) |
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case (markups, body) => |
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val (end_offset, markup_trees1) = (acc /: body)(make_trees) |
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val range = Text.Range(offset, end_offset) |
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val new_markup_tree = |
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(merge_disjoint(markup_trees1) /: markups) { |
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case (markup_tree, markup) => |
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markup_tree + Text.Info(range, XML.Elem(markup, Nil)) |
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} |
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(end_offset, List(new_markup_tree)) |
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} |
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} |
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def from_XML(body: XML.Body): Markup_Tree = |
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merge_disjoint(((0, Nil: List[Markup_Tree]) /: body)(make_trees)._2) |
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} |
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final class Markup_Tree private(private val branches: Markup_Tree.Branches.T) |
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{ |
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import Markup_Tree._ |
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private def this(branches: Markup_Tree.Branches.T, entry: Markup_Tree.Entry) = |
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this(branches + (entry.range -> entry)) |
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override def toString = |
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branches.toList.map(_._2) match { |
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case Nil => "Empty" |
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case list => list.mkString("Tree(", ",", ")") |
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} |
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private def overlapping(range: Text.Range): Branches.T = |
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{ |
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val start = Text.Range(range.start) |
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val stop = Text.Range(range.stop) |
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val bs = branches.range(start, stop) |
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// FIXME check after Scala 2.8.x |
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branches.get(stop) match { |
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case Some(end) if range overlaps end.range => bs + (end.range -> end) |
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case _ => bs |
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} |
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} |
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def + (new_markup: Text.Markup): Markup_Tree = |
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{ |
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val new_range = new_markup.range |
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branches.get(new_range) match { |
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case None => new Markup_Tree(branches, Entry(new_markup, empty)) |
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case Some(entry) => |
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if (entry.range == new_range) |
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new Markup_Tree(branches, entry + new_markup.info) |
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else if (entry.range.contains(new_range)) |
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new Markup_Tree(branches, entry.copy(subtree = entry.subtree + new_markup)) |
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else if (new_range.contains(branches.head._1) && new_range.contains(branches.last._1)) |
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new Markup_Tree(Branches.empty, Entry(new_markup, this)) |
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else { |
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val body = overlapping(new_range) |
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if (body.forall(e => new_range.contains(e._1))) { |
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val rest = // branches -- body, modulo workarounds for Redblack in Scala 2.8.0 FIXME |
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if (body.size > 1) |
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(Branches.empty /: branches)((rest, entry) => |
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if (body.isDefinedAt(entry._1)) rest else rest + entry) |
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else branches |
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new Markup_Tree(rest, Entry(new_markup, new Markup_Tree(body))) |
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} |
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else { // FIXME split markup!? |
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System.err.println("Ignored overlapping markup information: " + new_markup + |
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body.filter(e => !new_range.contains(e._1)).mkString("\n")) |
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this |
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} |
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} |
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} |
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} |
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def cumulate[A](root_range: Text.Range, root_info: A, result_elements: Option[Set[String]], |
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result: PartialFunction[(A, Text.Markup), A]): Stream[Text.Info[A]] = |
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{ |
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def results(x: A, entry: Entry): Option[A] = |
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if (result_elements match { case Some(es) => es.exists(entry.elements) case None => true }) { |
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val (y, changed) = |
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(entry.markup :\ (x, false))((info, res) => |
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{ |
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val (y, changed) = res |
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val arg = (y, Text.Info(entry.range, info)) |
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if (result.isDefinedAt(arg)) (result(arg), true) |
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else res |
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}) |
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if (changed) Some(y) else None |
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} |
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else None |
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def stream( |
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last: Text.Offset, |
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stack: List[(Text.Info[A], Stream[(Text.Range, Entry)])]): Stream[Text.Info[A]] = |
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{ |
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stack match { |
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case (parent, (range, entry) #:: more) :: rest => |
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val subrange = range.restrict(root_range) |
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val subtree = entry.subtree.overlapping(subrange).toStream |
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val start = subrange.start |
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results(parent.info, entry) match { |
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case Some(res) => |
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val next = Text.Info(subrange, res) |
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val nexts = stream(start, (next, subtree) :: (parent, more) :: rest) |
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if (last < start) parent.restrict(Text.Range(last, start)) #:: nexts |
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else nexts |
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case None => stream(last, (parent, subtree #::: more) :: rest) |
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} |
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case (parent, Stream.Empty) :: rest => |
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val stop = parent.range.stop |
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val nexts = stream(stop, rest) |
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if (last < stop) parent.restrict(Text.Range(last, stop)) #:: nexts |
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else nexts |
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case Nil => |
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val stop = root_range.stop |
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if (last < stop) Stream(Text.Info(Text.Range(last, stop), root_info)) |
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else Stream.empty |
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} |
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} |
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stream(root_range.start, |
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List((Text.Info(root_range, root_info), overlapping(root_range).toStream))) |
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} |
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def swing_tree(parent: DefaultMutableTreeNode, |
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swing_node: Text.Info[List[XML.Elem]] => DefaultMutableTreeNode) |
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{ |
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for ((_, entry) <- branches) { |
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val node = swing_node(Text.Info(entry.range, entry.markup)) |
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entry.subtree.swing_tree(node, swing_node) |
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parent.add(node) |
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} |
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} |
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} |
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