author | wenzelm |
Sat, 15 Dec 2012 18:30:09 +0100 | |
changeset 50552 | 2b7fd8c9c4ac |
parent 50551 | 67d934cdc9b9 |
child 50642 | aca12f646772 |
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.collection.mutable |
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import scala.annotation.tailrec |
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object Markup_Tree |
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{ |
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/* construct trees */ |
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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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/* tree building blocks */ |
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object Elements |
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{ |
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val empty = new Elements(Set.empty) |
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} |
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final class Elements private(private val rep: Set[String]) |
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{ |
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def contains(name: String): Boolean = rep.contains(name) |
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def + (name: String): Elements = |
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if (contains(name)) this |
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else new Elements(rep + name) |
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def + (elem: XML.Elem): Elements = this + elem.markup.name |
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def ++ (elems: Iterable[XML.Elem]): Elements = (this /: elems.iterator)(_ + _) |
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def ++ (other: Elements): Elements = |
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if (this eq other) this |
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else if (rep.isEmpty) other |
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else (this /: other.rep)(_ + _) |
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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), Elements.empty + markup.info, |
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subtree, subtree.make_elements) |
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def apply(range: Text.Range, rev_markups: List[XML.Elem], subtree: Markup_Tree): Entry = |
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Entry(range, rev_markups, Elements.empty ++ rev_markups, |
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subtree, subtree.make_elements) |
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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: Elements, |
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subtree: Markup_Tree, |
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subtree_elements: Elements) |
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{ |
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def markup: List[XML.Elem] = rev_markup.reverse |
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def + (markup: Text.Markup): Entry = |
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copy(rev_markup = markup.info :: rev_markup, elements = elements + markup.info) |
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def \ (markup: Text.Markup): Entry = |
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copy(subtree = subtree + markup, subtree_elements = subtree_elements + markup.info) |
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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( |
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elems: List[XML.Elem], body: XML.Body): (List[XML.Elem], XML.Body) = |
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body match { |
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case List(XML.Wrapped_Elem(markup1, body1, body2)) => |
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strip_elems(XML.Elem(markup1, body1) :: elems, body2) |
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case List(XML.Elem(markup1, body1)) => |
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strip_elems(XML.Elem(markup1, Nil) :: elems, body1) |
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case _ => (elems, 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 (elems, body) => |
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val (end_offset, subtrees) = ((offset, Nil: List[Markup_Tree]) /: body)(make_trees) |
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val range = Text.Range(offset, end_offset) |
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val entry = Entry(range, elems, merge_disjoint(subtrees)) |
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(end_offset, new Markup_Tree(Branches.empty, entry) :: markup_trees) |
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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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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 make_elements: Elements = |
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(Elements.empty /: branches)( |
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{ case (elements, (_, entry)) => elements ++ entry.subtree_elements ++ entry.elements }) |
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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) |
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else if (entry.range.contains(new_range)) |
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new Markup_Tree(branches, entry \ 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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new Markup_Tree(branches -- body.keys, Entry(new_markup, new Markup_Tree(body))) |
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else { |
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java.lang.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 to_XML(root_range: Text.Range, text: CharSequence, filter: XML.Elem => Boolean): XML.Body = |
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{ |
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def make_text(start: Text.Offset, stop: Text.Offset): XML.Body = |
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if (start == stop) Nil |
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else List(XML.Text(text.subSequence(start, stop).toString)) |
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def make_elems(rev_markups: List[XML.Elem], body: XML.Body): XML.Body = |
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(body /: rev_markups) { |
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case (b, elem) => |
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if (!filter(elem)) b |
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else if (elem.body.isEmpty) List(XML.Elem(elem.markup, b)) |
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else List(XML.Wrapped_Elem(elem.markup, elem.body, b)) |
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} |
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def make_body(elem_range: Text.Range, elem_markup: List[XML.Elem], entries: Branches.T) |
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: XML.Body = |
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{ |
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val body = new mutable.ListBuffer[XML.Tree] |
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var last = elem_range.start |
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for ((range, entry) <- entries) { |
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val subrange = range.restrict(elem_range) |
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body ++= make_text(last, subrange.start) |
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body ++= make_body(subrange, entry.rev_markup, entry.subtree.overlapping(subrange)) |
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last = subrange.stop |
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} |
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body ++= make_text(last, elem_range.stop) |
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make_elems(elem_markup, body.toList) |
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} |
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make_body(root_range, Nil, overlapping(root_range)) |
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} |
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def to_XML(text: CharSequence): XML.Body = |
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to_XML(Text.Range(0, text.length), text, (_: XML.Elem) => true) |
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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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val notable: Elements => Boolean = |
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result_elements match { |
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case Some(res) => (elements: Elements) => res.exists(elements.contains) |
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case None => (elements: Elements) => true |
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} |
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def results(x: A, entry: Entry): Option[A] = |
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{ |
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val (y, changed) = |
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// FIXME proper cumulation order (including status markup) (!?) |
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((x, false) /: entry.rev_markup)((res, info) => |
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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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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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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 = |
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if (notable(entry.subtree_elements)) |
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entry.subtree.overlapping(subrange).toStream |
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else Stream.empty |
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val start = subrange.start |
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||
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(if (notable(entry.elements)) results(parent.info, entry) else None) 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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