# HG changeset patch
# User blanchet
# Date 1482315295 -3600
# Node ID c6330e16743fbe49119b2bd1fbe10614f2b63a72
# Parent  f3f457535fe2d5569954b5fdd47278b789838f23# Parent  83f012ce256791a0ee559db4989d1a4701dbc0a4
merge

diff -r f3f457535fe2 -r c6330e16743f etc/components
--- a/etc/components	Wed Dec 21 11:14:37 2016 +0100
+++ b/etc/components	Wed Dec 21 11:14:55 2016 +0100
@@ -1,6 +1,7 @@
 #hard-wired components
 src/Tools/jEdit
 src/Tools/Graphview
+src/Tools/VSCode
 src/HOL/Mirabelle
 src/HOL/Mutabelle
 src/HOL/Library/Sum_of_Squares
diff -r f3f457535fe2 -r c6330e16743f src/Pure/Admin/check_sources.scala
--- a/src/Pure/Admin/check_sources.scala	Wed Dec 21 11:14:37 2016 +0100
+++ b/src/Pure/Admin/check_sources.scala	Wed Dec 21 11:14:55 2016 +0100
@@ -25,9 +25,9 @@
       try {
         Symbol.decode_strict(line)
 
-        for { c <- Word.codepoint_iterator(line); if c > 128 && !Character.isAlphabetic(c) }
+        for { c <- Codepoint.iterator(line); if c > 128 && !Character.isAlphabetic(c) }
         {
-          Output.warning("Suspicious Unicode character " + quote(Word.codepoint(c)) +
+          Output.warning("Suspicious Unicode character " + quote(Codepoint.string(c)) +
             Position.here(line_pos(i)))
         }
       }
diff -r f3f457535fe2 -r c6330e16743f src/Pure/General/codepoint.scala
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/src/Pure/General/codepoint.scala	Wed Dec 21 11:14:55 2016 +0100
@@ -0,0 +1,53 @@
+/*  Title:      Pure/General/codepoint.scala
+    Author:     Makarius
+
+Unicode codepoints vs. Unicode string encoding.
+*/
+
+package isabelle
+
+
+object Codepoint
+{
+  def string(c: Int): String = new String(Array(c), 0, 1)
+
+  def iterator(s: String): Iterator[Int] =
+    new Iterator[Int] {
+      var offset = 0
+      def hasNext: Boolean = offset < s.length
+      def next: Int =
+      {
+        val c = s.codePointAt(offset)
+        offset += Character.charCount(c)
+        c
+      }
+    }
+
+  def length(s: String): Int = iterator(s).length
+
+  trait Length extends isabelle.Length
+  {
+    protected def codepoint_length(c: Int): Int = 1
+
+    def apply(s: String): Int =
+      (0 /: iterator(s)) { case (n, c) => n + codepoint_length(c) }
+
+    def offset(s: String, i: Int): Option[Text.Offset] =
+    {
+      if (i <= 0 || s.forall(_ < 0x80)) isabelle.Length.offset(s, i)
+      else {
+        val length = s.length
+        var offset = 0
+        var j = 0
+        while (offset < length && j < i) {
+          val c = s.codePointAt(offset)
+          offset += Character.charCount(c)
+          j += codepoint_length(c)
+        }
+        if (j >= i) Some(offset) else None
+      }
+    }
+  }
+
+  object Length extends Length
+}
diff -r f3f457535fe2 -r c6330e16743f src/Pure/General/length.scala
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/src/Pure/General/length.scala	Wed Dec 21 11:14:55 2016 +0100
@@ -0,0 +1,33 @@
+/*  Title:      Pure/General/length.scala
+    Author:     Makarius
+
+Text length wrt. encoding.
+*/
+
+package isabelle
+
+
+trait Length
+{
+  def apply(text: String): Int
+  def offset(text: String, i: Int): Option[Text.Offset]
+}
+
+object Length extends Length
+{
+  def apply(text: String): Int = text.length
+  def offset(text: String, i: Int): Option[Text.Offset] =
+    if (0 <= i && i <= text.length) Some(i) else None
+
+  val encodings: List[(String, Length)] =
+    List(
+      "UTF-16" -> Length,
+      "UTF-8" -> UTF8.Length,
+      "codepoints" -> Codepoint.Length,
+      "symbols" -> Symbol.Length)
+
+  def encoding(name: String): Length =
+    encodings.collectFirst({ case (a, length) if name == a => length }) getOrElse
+      error("Bad text length encoding: " + quote(name) +
+        " (expected " + commas_quote(encodings.map(_._1)) + ")")
+}
diff -r f3f457535fe2 -r c6330e16743f src/Pure/General/symbol.scala
--- a/src/Pure/General/symbol.scala	Wed Dec 21 11:14:37 2016 +0100
+++ b/src/Pure/General/symbol.scala	Wed Dec 21 11:14:55 2016 +0100
@@ -128,14 +128,15 @@
 
   def explode(text: CharSequence): List[Symbol] = iterator(text).toList
 
-  def advance_line_column(pos: (Int, Int), text: CharSequence): (Int, Int) =
+  def length(text: CharSequence): Int = iterator(text).length
+
+  object Length extends isabelle.Length
   {
-    var (line, column) = pos
-    for (sym <- iterator(text)) {
-      if (is_newline(sym)) { line += 1; column = 1 }
-      else column += 1
-    }
-    (line, column)
+    def apply(text: String): Int = length(text)
+    def offset(text: String, i: Int): Option[Text.Offset] =
+      if (i <= 0 || iterator(text).forall(s => s.length == 1)) isabelle.Length.offset(text, i)
+      else if (i <= length(text)) Some(iterator(text).take(i).mkString.length)
+      else None
   }
 
 
diff -r f3f457535fe2 -r c6330e16743f src/Pure/General/word.scala
--- a/src/Pure/General/word.scala	Wed Dec 21 11:14:37 2016 +0100
+++ b/src/Pure/General/word.scala	Wed Dec 21 11:14:55 2016 +0100
@@ -12,23 +12,6 @@
 
 object Word
 {
-  /* codepoints */
-
-  def codepoint_iterator(str: String): Iterator[Int] =
-    new Iterator[Int] {
-      var offset = 0
-      def hasNext: Boolean = offset < str.length
-      def next: Int =
-      {
-        val c = str.codePointAt(offset)
-        offset += Character.charCount(c)
-        c
-      }
-    }
-
-  def codepoint(c: Int): String = new String(Array(c), 0, 1)
-
-
   /* directionality */
 
   def bidi_detect(str: String): Boolean =
@@ -51,7 +34,7 @@
     }
 
   def perhaps_capitalize(str: String): String =
-    if (codepoint_iterator(str).forall(c => Character.isLowerCase(c) || Character.isDigit(c)))
+    if (Codepoint.iterator(str).forall(c => Character.isLowerCase(c) || Character.isDigit(c)))
       capitalize(str)
     else str
 
@@ -70,10 +53,10 @@
       }
     def unapply(str: String): Option[Case] =
       if (str.nonEmpty) {
-        if (codepoint_iterator(str).forall(Character.isLowerCase(_))) Some(Lowercase)
-        else if (codepoint_iterator(str).forall(Character.isUpperCase(_))) Some(Uppercase)
+        if (Codepoint.iterator(str).forall(Character.isLowerCase(_))) Some(Lowercase)
+        else if (Codepoint.iterator(str).forall(Character.isUpperCase(_))) Some(Uppercase)
         else {
-          val it = codepoint_iterator(str)
+          val it = Codepoint.iterator(str)
           if (Character.isUpperCase(it.next) && it.forall(Character.isLowerCase(_)))
             Some(Capitalized)
           else None
diff -r f3f457535fe2 -r c6330e16743f src/Pure/Isar/document_structure.scala
--- a/src/Pure/Isar/document_structure.scala	Wed Dec 21 11:14:37 2016 +0100
+++ b/src/Pure/Isar/document_structure.scala	Wed Dec 21 11:14:55 2016 +0100
@@ -190,8 +190,7 @@
         toks.filterNot(_.is_space) match {
           case List(tok) if tok.is_comment =>
             val s = tok.source
-            if (Word.codepoint_iterator(s).exists(c =>
-                  Character.isLetter(c) || Character.isDigit(c)))
+            if (Codepoint.iterator(s).exists(c => Character.isLetter(c) || Character.isDigit(c)))
             {
               if (s.startsWith("(**** ") && s.endsWith(" ****)")) Some(0)
               else if (s.startsWith("(*** ") && s.endsWith(" ***)")) Some(1)
diff -r f3f457535fe2 -r c6330e16743f src/Pure/Isar/outer_syntax.scala
--- a/src/Pure/Isar/outer_syntax.scala	Wed Dec 21 11:14:37 2016 +0100
+++ b/src/Pure/Isar/outer_syntax.scala	Wed Dec 21 11:14:55 2016 +0100
@@ -154,8 +154,8 @@
               val name = cmd.source
               val offset =
                 (0 /: span.takeWhile(_ != cmd)) {
-                  case (i, tok) => i + Symbol.iterator(tok.source).length }
-              val end_offset = offset + Symbol.iterator(name).length
+                  case (i, tok) => i + Symbol.length(tok.source) }
+              val end_offset = offset + Symbol.length(name)
               val pos = Position.Range(Text.Range(offset, end_offset) + 1)
               Command_Span.Command_Span(name, pos)
           }
diff -r f3f457535fe2 -r c6330e16743f src/Pure/PIDE/line.scala
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/src/Pure/PIDE/line.scala	Wed Dec 21 11:14:55 2016 +0100
@@ -0,0 +1,134 @@
+/*  Title:      Pure/PIDE/line.scala
+    Author:     Makarius
+
+Line-oriented text.
+*/
+
+package isabelle
+
+
+import scala.annotation.tailrec
+
+
+object Line
+{
+  /* position */
+
+  object Position
+  {
+    val zero: Position = Position(0, 0)
+  }
+
+  sealed case class Position(line: Int, column: Int)
+  {
+    def line1: Int = line + 1
+    def column1: Int = column + 1
+    def print: String = line1.toString + ":" + column1.toString
+
+    def compare(that: Position): Int =
+      line compare that.line match {
+        case 0 => column compare that.column
+        case i => i
+      }
+
+    def advance(text: String, length: Length = Length): Position =
+      if (text.isEmpty) this
+      else {
+        val lines = Library.split_lines(text)
+        val l = line + lines.length - 1
+        val c = (if (l == line) column else 0) + length(Library.trim_line(lines.last))
+        Position(l, c)
+      }
+  }
+
+
+  /* range (right-open interval) */
+
+  sealed case class Range(start: Position, stop: Position)
+  {
+    if (start.compare(stop) > 0)
+      error("Bad line range: " + start.print + ".." + stop.print)
+
+    def print: String = start.print + ".." + stop.print
+  }
+
+
+  /* document with newline as separator (not terminator) */
+
+  object Document
+  {
+    val empty: Document = new Document("", Nil)
+
+    def apply(lines: List[Line]): Document =
+      if (lines.isEmpty) empty
+      else new Document(lines.mkString("", "\n", ""), lines)
+
+    def apply(text: String): Document =
+      if (text.contains('\r'))
+        apply(Library.cat_lines(Library.split_lines(text).map(Library.trim_line(_))))
+      else if (text == "") Document.empty
+      else new Document(text, Library.split_lines(text).map(Line(_)))
+  }
+
+  final class Document private(val text: String, val lines: List[Line])
+  {
+    override def toString: String = text
+
+    override def equals(that: Any): Boolean =
+      that match {
+        case other: Document => lines == other.lines
+        case _ => false
+      }
+    override def hashCode(): Int = lines.hashCode
+
+    def position(offset: Text.Offset, length: Length = Length): Position =
+    {
+      @tailrec def move(i: Text.Offset, lines_count: Int, lines_rest: List[Line]): Position =
+      {
+        lines_rest match {
+          case Nil => require(i == 0); Position(lines_count, 0)
+          case line :: ls =>
+            val n = line.text.length
+            if (ls.isEmpty || i <= n)
+              Position(lines_count, 0).advance(line.text.substring(n - i), length)
+            else move(i - (n + 1), lines_count + 1, ls)
+        }
+      }
+      move(offset, 0, lines)
+    }
+
+    def offset(pos: Position, length: Length = Length): Option[Text.Offset] =
+    {
+      val l = pos.line
+      val c = pos.column
+      if (0 <= l && l < lines.length) {
+        val line_offset =
+          if (l == 0) 0
+          else (0 /: lines.iterator.take(l - 1))({ case (n, line) => n + length(line.text) + 1 })
+        length.offset(lines(l).text, c).map(line_offset + _)
+      }
+      else None
+    }
+  }
+
+
+  /* line text */
+
+  val empty: Line = new Line("")
+  def apply(text: String): Line = if (text == "") empty else new Line(text)
+}
+
+final class Line private(val text: String)
+{
+  require(text.forall(c => c != '\r' && c != '\n'))
+
+  lazy val length_codepoints: Int = Codepoint.iterator(text).length
+
+  override def equals(that: Any): Boolean =
+    that match {
+      case other: Line => text == other.text
+      case _ => false
+    }
+  override def hashCode(): Int = text.hashCode
+  override def toString: String = text
+}
diff -r f3f457535fe2 -r c6330e16743f src/Pure/PIDE/protocol.scala
--- a/src/Pure/PIDE/protocol.scala	Wed Dec 21 11:14:37 2016 +0100
+++ b/src/Pure/PIDE/protocol.scala	Wed Dec 21 11:14:55 2016 +0100
@@ -337,8 +337,7 @@
     val toks_yxml =
     {
       import XML.Encode._
-      val encode_tok: T[Token] =
-        (tok => pair(int, int)((tok.kind.id, Symbol.iterator(tok.source).length)))
+      val encode_tok: T[Token] = (tok => pair(int, int)((tok.kind.id, Symbol.length(tok.source))))
       YXML.string_of_body(list(encode_tok)(toks))
     }
 
diff -r f3f457535fe2 -r c6330e16743f src/Pure/PIDE/rendering.scala
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/src/Pure/PIDE/rendering.scala	Wed Dec 21 11:14:55 2016 +0100
@@ -0,0 +1,147 @@
+/*  Title:      Pure/PIDE/rendering.scala
+    Author:     Makarius
+
+Isabelle-specific implementation of quasi-abstract rendering and
+markup interpretation.
+*/
+
+package isabelle
+
+
+object Rendering
+{
+  private val tooltip_descriptions =
+    Map(
+      Markup.CITATION -> "citation",
+      Markup.TOKEN_RANGE -> "inner syntax token",
+      Markup.FREE -> "free variable",
+      Markup.SKOLEM -> "skolem variable",
+      Markup.BOUND -> "bound variable",
+      Markup.VAR -> "schematic variable",
+      Markup.TFREE -> "free type variable",
+      Markup.TVAR -> "schematic type variable")
+
+  private val tooltip_elements =
+    Markup.Elements(Markup.LANGUAGE, Markup.EXPRESSION, Markup.TIMING, Markup.ENTITY,
+      Markup.SORTING, Markup.TYPING, Markup.CLASS_PARAMETER, Markup.ML_TYPING,
+      Markup.ML_BREAKPOINT, Markup.PATH, Markup.DOC, Markup.URL, Markup.MARKDOWN_PARAGRAPH,
+      Markup.Markdown_List.name) ++ Markup.Elements(tooltip_descriptions.keySet)
+
+  private def pretty_typing(kind: String, body: XML.Body): XML.Tree =
+    Pretty.block(XML.Text(kind) :: Pretty.brk(1) :: body)
+}
+
+abstract class Rendering(
+  val snapshot: Document.Snapshot,
+  val options: Options,
+  val resources: Resources)
+{
+  override def toString: String = "Rendering(" + snapshot.toString + ")"
+
+
+  /* resources */
+
+  def resolve_file(name: String): String =
+    if (Path.is_valid(name))
+      resources.append(snapshot.node_name.master_dir, Path.explode(name))
+    else name
+
+
+  /* tooltips */
+
+  def tooltip_margin: Int
+  def timing_threshold: Double
+
+  def tooltip(range: Text.Range): Option[Text.Info[XML.Body]] =
+  {
+    def add(prev: Text.Info[(Timing, Vector[(Boolean, XML.Tree)])],
+      r0: Text.Range, p: (Boolean, XML.Tree)): Text.Info[(Timing, Vector[(Boolean, XML.Tree)])] =
+    {
+      val r = snapshot.convert(r0)
+      val (t, info) = prev.info
+      if (prev.range == r)
+        Text.Info(r, (t, info :+ p))
+      else Text.Info(r, (t, Vector(p)))
+    }
+
+    val results =
+      snapshot.cumulate[Text.Info[(Timing, Vector[(Boolean, XML.Tree)])]](
+        range, Text.Info(range, (Timing.zero, Vector.empty)), Rendering.tooltip_elements, _ =>
+        {
+          case (Text.Info(r, (t1, info)), Text.Info(_, XML.Elem(Markup.Timing(t2), _))) =>
+            Some(Text.Info(r, (t1 + t2, info)))
+
+          case (prev, Text.Info(r, XML.Elem(Markup.Entity(kind, name), _)))
+          if kind != "" &&
+            kind != Markup.ML_DEF &&
+            kind != Markup.ML_OPEN &&
+            kind != Markup.ML_STRUCTURE =>
+            val kind1 = Word.implode(Word.explode('_', kind))
+            val txt1 =
+              if (name == "") kind1
+              else if (kind1 == "") quote(name)
+              else kind1 + " " + quote(name)
+            val t = prev.info._1
+            val txt2 =
+              if (kind == Markup.COMMAND && t.elapsed.seconds >= timing_threshold)
+                "\n" + t.message
+              else ""
+            Some(add(prev, r, (true, XML.Text(txt1 + txt2))))
+
+          case (prev, Text.Info(r, XML.Elem(Markup.Path(name), _))) =>
+            val file = resolve_file(name)
+            val text =
+              if (name == file) "file " + quote(file)
+              else "path " + quote(name) + "\nfile " + quote(file)
+            Some(add(prev, r, (true, XML.Text(text))))
+
+          case (prev, Text.Info(r, XML.Elem(Markup.Doc(name), _))) =>
+            val text = "doc " + quote(name)
+            Some(add(prev, r, (true, XML.Text(text))))
+
+          case (prev, Text.Info(r, XML.Elem(Markup.Url(name), _))) =>
+            Some(add(prev, r, (true, XML.Text("URL " + quote(name)))))
+
+          case (prev, Text.Info(r, XML.Elem(Markup(name, _), body)))
+          if name == Markup.SORTING || name == Markup.TYPING =>
+            Some(add(prev, r, (true, Rendering.pretty_typing("::", body))))
+
+          case (prev, Text.Info(r, XML.Elem(Markup(Markup.CLASS_PARAMETER, _), body))) =>
+            Some(add(prev, r, (true, Pretty.block(0, body))))
+
+          case (prev, Text.Info(r, XML.Elem(Markup(Markup.ML_TYPING, _), body))) =>
+            Some(add(prev, r, (false, Rendering.pretty_typing("ML:", body))))
+
+          case (prev, Text.Info(r, Protocol.ML_Breakpoint(breakpoint))) =>
+            val text =
+              if (Debugger.breakpoint_state(breakpoint)) "breakpoint (enabled)"
+              else "breakpoint (disabled)"
+            Some(add(prev, r, (true, XML.Text(text))))
+
+          case (prev, Text.Info(r, XML.Elem(Markup.Language(language, _, _, _), _))) =>
+            val lang = Word.implode(Word.explode('_', language))
+            Some(add(prev, r, (true, XML.Text("language: " + lang))))
+
+          case (prev, Text.Info(r, XML.Elem(Markup.Expression(kind), _))) =>
+            val descr = if (kind == "") "expression" else "expression: " + kind
+            Some(add(prev, r, (true, XML.Text(descr))))
+
+          case (prev, Text.Info(r, XML.Elem(Markup(Markup.MARKDOWN_PARAGRAPH, _), _))) =>
+            Some(add(prev, r, (true, XML.Text("Markdown: paragraph"))))
+          case (prev, Text.Info(r, XML.Elem(Markup.Markdown_List(kind), _))) =>
+            Some(add(prev, r, (true, XML.Text("Markdown: " + kind))))
+
+          case (prev, Text.Info(r, XML.Elem(Markup(name, _), _))) =>
+            Rendering.tooltip_descriptions.get(name).
+              map(descr => add(prev, r, (true, XML.Text(descr))))
+        }).map(_.info)
+
+    results.map(_.info).flatMap(res => res._2.toList) match {
+      case Nil => None
+      case tips =>
+        val r = Text.Range(results.head.range.start, results.last.range.stop)
+        val all_tips = (tips.filter(_._1) ++ tips.filter(!_._1).lastOption.toList).map(_._2)
+        Some(Text.Info(r, Library.separate(Pretty.fbrk, all_tips)))
+    }
+  }
+}
diff -r f3f457535fe2 -r c6330e16743f src/Pure/System/utf8.scala
--- a/src/Pure/System/utf8.scala	Wed Dec 21 11:14:37 2016 +0100
+++ b/src/Pure/System/utf8.scala	Wed Dec 21 11:14:55 2016 +0100
@@ -21,6 +21,15 @@
 
   def bytes(s: String): Array[Byte] = s.getBytes(charset)
 
+  object Length extends Codepoint.Length
+  {
+    override def codepoint_length(c: Int): Int =
+      if (c < 0x80) 1
+      else if (c < 0x800) 2
+      else if (c < 0x10000) 3
+      else 4
+  }
+
 
   /* permissive UTF-8 decoding */
 
@@ -88,4 +97,3 @@
     new Decode_Chars(decode, buffer, start, end)
   }
 }
-
diff -r f3f457535fe2 -r c6330e16743f src/Pure/build-jars
--- a/src/Pure/build-jars	Wed Dec 21 11:14:37 2016 +0100
+++ b/src/Pure/build-jars	Wed Dec 21 11:14:55 2016 +0100
@@ -39,6 +39,7 @@
   GUI/wrap_panel.scala
   General/antiquote.scala
   General/bytes.scala
+  General/codepoint.scala
   General/completion.scala
   General/date.scala
   General/exn.scala
@@ -48,6 +49,7 @@
   General/graphics_file.scala
   General/http_server.scala
   General/json.scala
+  General/length.scala
   General/linear_set.scala
   General/logger.scala
   General/long_name.scala
@@ -85,12 +87,14 @@
   PIDE/document.scala
   PIDE/document_id.scala
   PIDE/editor.scala
+  PIDE/line.scala
   PIDE/markup.scala
   PIDE/markup_tree.scala
   PIDE/protocol.scala
   PIDE/protocol_message.scala
   PIDE/prover.scala
   PIDE/query_operation.scala
+  PIDE/rendering.scala
   PIDE/resources.scala
   PIDE/session.scala
   PIDE/text.scala
@@ -141,25 +145,25 @@
   library.scala
   term.scala
   term_xml.scala
-  "../Tools/Graphview/graph_file.scala"
-  "../Tools/Graphview/graph_panel.scala"
-  "../Tools/Graphview/graphview.scala"
-  "../Tools/Graphview/layout.scala"
-  "../Tools/Graphview/main_panel.scala"
-  "../Tools/Graphview/metrics.scala"
-  "../Tools/Graphview/model.scala"
-  "../Tools/Graphview/mutator.scala"
-  "../Tools/Graphview/mutator_dialog.scala"
-  "../Tools/Graphview/mutator_event.scala"
-  "../Tools/Graphview/popups.scala"
-  "../Tools/Graphview/shapes.scala"
-  "../Tools/Graphview/tree_panel.scala"
-  "../Tools/VSCode/src/channel.scala"
-  "../Tools/VSCode/src/document_model.scala"
-  "../Tools/VSCode/src/line.scala"
-  "../Tools/VSCode/src/protocol.scala"
-  "../Tools/VSCode/src/server.scala"
-  "../Tools/VSCode/src/uri_resources.scala"
+  ../Tools/Graphview/graph_file.scala
+  ../Tools/Graphview/graph_panel.scala
+  ../Tools/Graphview/graphview.scala
+  ../Tools/Graphview/layout.scala
+  ../Tools/Graphview/main_panel.scala
+  ../Tools/Graphview/metrics.scala
+  ../Tools/Graphview/model.scala
+  ../Tools/Graphview/mutator.scala
+  ../Tools/Graphview/mutator_dialog.scala
+  ../Tools/Graphview/mutator_event.scala
+  ../Tools/Graphview/popups.scala
+  ../Tools/Graphview/shapes.scala
+  ../Tools/Graphview/tree_panel.scala
+  ../Tools/VSCode/src/channel.scala
+  ../Tools/VSCode/src/document_model.scala
+  ../Tools/VSCode/src/protocol.scala
+  ../Tools/VSCode/src/server.scala
+  ../Tools/VSCode/src/vscode_rendering.scala
+  ../Tools/VSCode/src/vscode_resources.scala
 )
 
 
diff -r f3f457535fe2 -r c6330e16743f src/Tools/VSCode/etc/options
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/src/Tools/VSCode/etc/options	Wed Dec 21 11:14:55 2016 +0100
@@ -0,0 +1,7 @@
+(* :mode=isabelle-options: *)
+
+option vscode_tooltip_margin : int = 60
+  -- "margin for tooltip pretty-printing"
+
+option vscode_timing_threshold : real = 0.1
+  -- "default threshold for timing display (seconds)"
diff -r f3f457535fe2 -r c6330e16743f src/Tools/VSCode/src/document_model.scala
--- a/src/Tools/VSCode/src/document_model.scala	Wed Dec 21 11:14:37 2016 +0100
+++ b/src/Tools/VSCode/src/document_model.scala	Wed Dec 21 11:14:55 2016 +0100
@@ -52,7 +52,10 @@
   def unchanged: Document_Model = if (changed) copy(changed = false) else this
 
 
-  /* snapshot */
+  /* snapshot and rendering */
 
   def snapshot(): Document.Snapshot = session.snapshot(node_name, text_edits)
+
+  def rendering(options: Options): VSCode_Rendering =
+    new VSCode_Rendering(snapshot(), options, session.resources)
 }
diff -r f3f457535fe2 -r c6330e16743f src/Tools/VSCode/src/line.scala
--- a/src/Tools/VSCode/src/line.scala	Wed Dec 21 11:14:37 2016 +0100
+++ /dev/null	Thu Jan 01 00:00:00 1970 +0000
@@ -1,151 +0,0 @@
-/*  Title:      Tools/VSCode/src/line.scala
-    Author:     Makarius
-
-Line-oriented text.
-*/
-
-package isabelle.vscode
-
-
-import isabelle._
-
-import scala.annotation.tailrec
-
-
-object Line
-{
-  /* position */
-
-  object Position
-  {
-    val zero: Position = Position(0, 0)
-  }
-
-  sealed case class Position(line: Int, column: Int)
-  {
-    def line1: Int = line + 1
-    def column1: Int = column + 1
-    def print: String = line1.toString + ":" + column1.toString
-
-    def compare(that: Position): Int =
-      line compare that.line match {
-        case 0 => column compare that.column
-        case i => i
-      }
-
-    private def advance[A](iterator: Iterator[A], is_newline: A => Boolean): Position =
-    {
-      var l = line
-      var c = column
-      for (x <- iterator) {
-        if (is_newline(x)) { l += 1; c = 0 } else c += 1
-      }
-      Position(l, c)
-    }
-
-    def advance(text: String): Position =
-      if (text.isEmpty) this else advance[Char](text.iterator, _ == '\n')
-
-    def advance_symbols(text: String): Position =
-      if (text.isEmpty) this else advance[Symbol.Symbol](Symbol.iterator(text), Symbol.is_newline _)
-
-    def advance_codepoints(text: String): Position =
-      if (text.isEmpty) this else advance[Int](Word.codepoint_iterator(text), _ == 10)
-  }
-
-
-  /* range (right-open interval) */
-
-  sealed case class Range(start: Position, stop: Position)
-  {
-    if (start.compare(stop) > 0)
-      error("Bad line range: " + start.print + ".." + stop.print)
-
-    def print: String = start.print + ".." + stop.print
-  }
-
-
-  /* document with newline as separator (not terminator) */
-
-  object Document
-  {
-    val empty: Document = new Document("", Nil)
-
-    def apply(lines: List[Line]): Document =
-      if (lines.isEmpty) empty
-      else new Document(lines.mkString("", "\n", ""), lines)
-
-    def apply(text: String): Document =
-      if (text.contains('\r'))
-        apply(Library.cat_lines(Library.split_lines(text).map(Library.trim_line(_))))
-      else if (text == "") Document.empty
-      else new Document(text, Library.split_lines(text).map(Line(_)))
-  }
-
-  final class Document private(val text: String, val lines: List[Line])
-  {
-    override def toString: String = text
-
-    override def equals(that: Any): Boolean =
-      that match {
-        case other: Document => lines == other.lines
-        case _ => false
-      }
-    override def hashCode(): Int = lines.hashCode
-
-    private def position(advance: (Position, String) => Position, offset: Text.Offset): Position =
-    {
-      @tailrec def move(i: Text.Offset, lines_count: Int, lines_rest: List[Line]): Position =
-      {
-        lines_rest match {
-          case Nil => require(i == 0); Position(lines_count, 0)
-          case line :: ls =>
-            val n = line.text.length
-            if (ls.isEmpty || i <= n) advance(Position(lines_count, 0), line.text.substring(n - i))
-            else move(i - (n + 1), lines_count + 1, ls)
-        }
-      }
-      move(offset, 0, lines)
-    }
-
-    def position(i: Text.Offset): Position = position(_.advance(_), i)
-    def position_symbols(i: Text.Offset): Position = position(_.advance_symbols(_), i)
-    def position_codepoints(i: Text.Offset): Position = position(_.advance_codepoints(_), i)
-
-    // FIXME symbols, codepoints
-    def offset(pos: Position): Option[Text.Offset] =
-    {
-      val l = pos.line
-      val c = pos.column
-      if (0 <= l && l < lines.length) {
-        val line_offset =
-          if (l == 0) 0
-          else (0 /: lines.take(l - 1))({ case (n, line) => n + line.text.length + 1 })
-        if (c <= lines(l).text.length) Some(line_offset + c) else None
-      }
-      else None
-    }
-  }
-
-
-  /* line text */
-
-  val empty: Line = new Line("")
-  def apply(text: String): Line = if (text == "") empty else new Line(text)
-}
-
-final class Line private(val text: String)
-{
-  require(text.forall(c => c != '\r' && c != '\n'))
-
-  lazy val length_symbols: Int = Symbol.iterator(text).length
-  lazy val length_codepoints: Int = Word.codepoint_iterator(text).length
-
-  override def equals(that: Any): Boolean =
-    that match {
-      case other: Line => text == other.text
-      case _ => false
-    }
-  override def hashCode(): Int = text.hashCode
-  override def toString: String = text
-}
diff -r f3f457535fe2 -r c6330e16743f src/Tools/VSCode/src/server.scala
--- a/src/Tools/VSCode/src/server.scala	Wed Dec 21 11:14:37 2016 +0100
+++ b/src/Tools/VSCode/src/server.scala	Wed Dec 21 11:14:55 2016 +0100
@@ -20,21 +20,28 @@
 {
   /* Isabelle tool wrapper */
 
+  private val default_text_length = "UTF-16"
   private lazy val default_logic = Isabelle_System.getenv("ISABELLE_LOGIC")
 
   val isabelle_tool = Isabelle_Tool("vscode_server", "VSCode Language Server for PIDE", args =>
   {
     var log_file: Option[Path] = None
+    var text_length = Length.encoding(default_text_length)
     var dirs: List[Path] = Nil
     var logic = default_logic
     var modes: List[String] = Nil
     var options = Options.init()
 
+    def text_length_choice: String =
+      commas(Length.encodings.map(
+        { case (a, _) => if (a == default_text_length) a + " (default)" else a }))
+
     val getopts = Getopts("""
 Usage: isabelle vscode_server [OPTIONS]
 
   Options are:
     -L FILE      enable logging on FILE
+    -T LENGTH    text length encoding: """ + text_length_choice + """
     -d DIR       include session directory
     -l NAME      logic session name (default ISABELLE_LOGIC=""" + quote(logic) + """)
     -m MODE      add print mode for output
@@ -43,6 +50,7 @@
   Run the VSCode Language Server protocol (JSON RPC) over stdin/stdout.
 """,
       "L:" -> (arg => log_file = Some(Path.explode(arg))),
+      "T:" -> (arg => Length.encoding(arg)),
       "d:" -> (arg => dirs = dirs ::: List(Path.explode(arg))),
       "l:" -> (arg => logic = arg),
       "m:" -> (arg => modes = arg :: modes),
@@ -56,7 +64,7 @@
       error("Missing logic image " + quote(logic))
 
     val channel = new Channel(System.in, System.out, log_file)
-    val server = new Server(channel, options, logic, dirs, modes)
+    val server = new Server(channel, options, text_length, logic, dirs, modes)
 
     // prevent spurious garbage on the main protocol channel
     val orig_out = System.out
@@ -78,6 +86,7 @@
 class Server(
   channel: Channel,
   options: Options,
+  text_length: Length = Length.encoding(Server.default_text_length),
   session_name: String = Server.default_logic,
   session_dirs: List[Path] = Nil,
   modes: List[String] = Nil)
@@ -87,7 +96,7 @@
   private val state = Synchronized(Server.State())
 
   def session: Session = state.value.session getOrElse error("Session inactive")
-  def resources: URI_Resources = session.resources.asInstanceOf[URI_Resources]
+  def resources: VSCode_Resources = session.resources.asInstanceOf[VSCode_Resources]
 
 
   /* init and exit */
@@ -96,7 +105,7 @@
   {
     val content = Build.session_content(options, false, session_dirs, session_name)
     val resources =
-      new URI_Resources(content.loaded_theories, content.known_theories, content.syntax)
+      new VSCode_Resources(content.loaded_theories, content.known_theories, content.syntax)
 
     val session =
       new Session(resources) {
@@ -179,124 +188,21 @@
   }
 
 
-  /* tooltips -- see $ISABELLE_HOME/src/Tools/jEdit/rendering.scala */
+  /* hover */
 
   def hover(uri: String, pos: Line.Position): Option[(Line.Range, List[String])] =
     for {
       model <- state.value.models.get(uri)
-      snapshot = model.snapshot()
-      offset <- model.doc.offset(pos)
-      info <- tooltip(snapshot, Text.Range(offset, offset + 1))
+      rendering = model.rendering(options)
+      offset <- model.doc.offset(pos, text_length)
+      info <- rendering.tooltip(Text.Range(offset, offset + 1))
     } yield {
-      val r = Line.Range(model.doc.position(info.range.start), model.doc.position(info.range.stop))
-      val s = Pretty.string_of(info.info, margin = tooltip_margin.toDouble)
-      (r, List("```\n" + s + "\n```"))
-    }
-
-  private val tooltip_descriptions =
-    Map(
-      Markup.CITATION -> "citation",
-      Markup.TOKEN_RANGE -> "inner syntax token",
-      Markup.FREE -> "free variable",
-      Markup.SKOLEM -> "skolem variable",
-      Markup.BOUND -> "bound variable",
-      Markup.VAR -> "schematic variable",
-      Markup.TFREE -> "free type variable",
-      Markup.TVAR -> "schematic type variable")
-
-  private val tooltip_elements =
-    Markup.Elements(Markup.LANGUAGE, Markup.EXPRESSION, Markup.TIMING, Markup.ENTITY,
-      Markup.SORTING, Markup.TYPING, Markup.CLASS_PARAMETER, Markup.ML_TYPING,
-      Markup.ML_BREAKPOINT, Markup.PATH, Markup.DOC, Markup.URL, Markup.MARKDOWN_PARAGRAPH,
-      Markup.Markdown_List.name) ++ Markup.Elements(tooltip_descriptions.keySet)
-
-  private def pretty_typing(kind: String, body: XML.Body): XML.Tree =
-    Pretty.block(XML.Text(kind) :: Pretty.brk(1) :: body)
-
-  private def timing_threshold: Double = options.real("jedit_timing_threshold")
-
-  def tooltip(snapshot: Document.Snapshot, range: Text.Range): Option[Text.Info[XML.Body]] =
-  {
-    def add(prev: Text.Info[(Timing, Vector[(Boolean, XML.Tree)])],
-      r0: Text.Range, p: (Boolean, XML.Tree)): Text.Info[(Timing, Vector[(Boolean, XML.Tree)])] =
-    {
-      val r = snapshot.convert(r0)
-      val (t, info) = prev.info
-      if (prev.range == r)
-        Text.Info(r, (t, info :+ p))
-      else Text.Info(r, (t, Vector(p)))
+      val start = model.doc.position(info.range.start, text_length)
+      val stop = model.doc.position(info.range.stop, text_length)
+      val s = Pretty.string_of(info.info, margin = rendering.tooltip_margin)
+      (Line.Range(start, stop), List("```\n" + s + "\n```"))
     }
 
-    val results =
-      snapshot.cumulate[Text.Info[(Timing, Vector[(Boolean, XML.Tree)])]](
-        range, Text.Info(range, (Timing.zero, Vector.empty)), tooltip_elements, _ =>
-        {
-          case (Text.Info(r, (t1, info)), Text.Info(_, XML.Elem(Markup.Timing(t2), _))) =>
-            Some(Text.Info(r, (t1 + t2, info)))
-
-          case (prev, Text.Info(r, XML.Elem(Markup.Entity(kind, name), _)))
-          if kind != "" &&
-            kind != Markup.ML_DEF &&
-            kind != Markup.ML_OPEN &&
-            kind != Markup.ML_STRUCTURE =>
-            val kind1 = Word.implode(Word.explode('_', kind))
-            val txt1 =
-              if (name == "") kind1
-              else if (kind1 == "") quote(name)
-              else kind1 + " " + quote(name)
-            val t = prev.info._1
-            val txt2 =
-              if (kind == Markup.COMMAND && t.elapsed.seconds >= timing_threshold)
-                "\n" + t.message
-              else ""
-            Some(add(prev, r, (true, XML.Text(txt1 + txt2))))
-
-          case (prev, Text.Info(r, XML.Elem(Markup.Doc(name), _))) =>
-            val text = "doc " + quote(name)
-            Some(add(prev, r, (true, XML.Text(text))))
-
-          case (prev, Text.Info(r, XML.Elem(Markup.Url(name), _))) =>
-            Some(add(prev, r, (true, XML.Text("URL " + quote(name)))))
-
-          case (prev, Text.Info(r, XML.Elem(Markup(name, _), body)))
-          if name == Markup.SORTING || name == Markup.TYPING =>
-            Some(add(prev, r, (true, pretty_typing("::", body))))
-
-          case (prev, Text.Info(r, XML.Elem(Markup(Markup.CLASS_PARAMETER, _), body))) =>
-            Some(add(prev, r, (true, Pretty.block(0, body))))
-
-          case (prev, Text.Info(r, XML.Elem(Markup(Markup.ML_TYPING, _), body))) =>
-            Some(add(prev, r, (false, pretty_typing("ML:", body))))
-
-          case (prev, Text.Info(r, XML.Elem(Markup.Language(language, _, _, _), _))) =>
-            val lang = Word.implode(Word.explode('_', language))
-            Some(add(prev, r, (true, XML.Text("language: " + lang))))
-
-          case (prev, Text.Info(r, XML.Elem(Markup.Expression(kind), _))) =>
-            val descr = if (kind == "") "expression" else "expression: " + kind
-            Some(add(prev, r, (true, XML.Text(descr))))
-
-          case (prev, Text.Info(r, XML.Elem(Markup(Markup.MARKDOWN_PARAGRAPH, _), _))) =>
-            Some(add(prev, r, (true, XML.Text("Markdown: paragraph"))))
-          case (prev, Text.Info(r, XML.Elem(Markup.Markdown_List(kind), _))) =>
-            Some(add(prev, r, (true, XML.Text("Markdown: " + kind))))
-
-          case (prev, Text.Info(r, XML.Elem(Markup(name, _), _))) =>
-            tooltip_descriptions.get(name).
-              map(descr => add(prev, r, (true, XML.Text(descr))))
-        }).map(_.info)
-
-    results.map(_.info).flatMap(res => res._2.toList) match {
-      case Nil => None
-      case tips =>
-        val r = Text.Range(results.head.range.start, results.last.range.stop)
-        val all_tips = (tips.filter(_._1) ++ tips.filter(!_._1).lastOption.toList).map(_._2)
-        Some(Text.Info(r, Library.separate(Pretty.fbrk, all_tips)))
-    }
-  }
-
-  def tooltip_margin: Int = options.int("jedit_tooltip_margin")
-
 
   /* main loop */
 
diff -r f3f457535fe2 -r c6330e16743f src/Tools/VSCode/src/uri_resources.scala
--- a/src/Tools/VSCode/src/uri_resources.scala	Wed Dec 21 11:14:37 2016 +0100
+++ /dev/null	Thu Jan 01 00:00:00 1970 +0000
@@ -1,43 +0,0 @@
-/*  Title:      Tools/VSCode/src/uri_resources.scala
-    Author:     Makarius
-
-Resources based on file-system URIs.
-*/
-
-package isabelle.vscode
-
-
-import isabelle._
-
-import java.net.{URI, URISyntaxException}
-import java.io.{File => JFile}
-
-
-object URI_Resources
-{
-  def is_wellformed(uri: String): Boolean =
-    try { new JFile(new URI(uri)); true }
-    catch { case _: URISyntaxException | _: IllegalArgumentException => false }
-
-  def canonical_file(uri: String): JFile =
-    new JFile(new URI(uri)).getCanonicalFile
-
-  val empty: URI_Resources =
-    new URI_Resources(Set.empty, Map.empty, Outer_Syntax.empty)
-}
-
-class URI_Resources(
-    loaded_theories: Set[String],
-    known_theories: Map[String, Document.Node.Name],
-    base_syntax: Outer_Syntax)
-  extends Resources(loaded_theories, known_theories, base_syntax)
-{
-  def node_name(uri: String): Document.Node.Name =
-  {
-    val file = URI_Resources.canonical_file(uri)  // FIXME wellformed!?
-    val node = file.getPath
-    val theory = Thy_Header.thy_name_bootstrap(node).getOrElse("")
-    val master_dir = if (theory == "") "" else file.getParent
-    Document.Node.Name(node, master_dir, theory)
-  }
-}
diff -r f3f457535fe2 -r c6330e16743f src/Tools/VSCode/src/vscode_rendering.scala
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/src/Tools/VSCode/src/vscode_rendering.scala	Wed Dec 21 11:14:55 2016 +0100
@@ -0,0 +1,21 @@
+/*  Title:      Tools/VSCode/src/vscode_rendering.scala
+    Author:     Makarius
+
+Isabelle/VSCode-specific implementation of quasi-abstract rendering and
+markup interpretation.
+*/
+
+package isabelle.vscode
+
+
+import isabelle._
+
+
+class VSCode_Rendering(snapshot: Document.Snapshot, options: Options, resources: Resources)
+  extends Rendering(snapshot, options, resources)
+{
+  /* tooltips */
+
+  def tooltip_margin: Int = options.int("vscode_tooltip_margin")
+  def timing_threshold: Double = options.real("vscode_timing_threshold")
+}
diff -r f3f457535fe2 -r c6330e16743f src/Tools/VSCode/src/vscode_resources.scala
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/src/Tools/VSCode/src/vscode_resources.scala	Wed Dec 21 11:14:55 2016 +0100
@@ -0,0 +1,43 @@
+/*  Title:      Tools/VSCode/src/vscode_resources.scala
+    Author:     Makarius
+
+Resources for VSCode Language Server, based on file-system URIs.
+*/
+
+package isabelle.vscode
+
+
+import isabelle._
+
+import java.net.{URI, URISyntaxException}
+import java.io.{File => JFile}
+
+
+object VSCode_Resources
+{
+  def is_wellformed(uri: String): Boolean =
+    try { new JFile(new URI(uri)); true }
+    catch { case _: URISyntaxException | _: IllegalArgumentException => false }
+
+  def canonical_file(uri: String): JFile =
+    new JFile(new URI(uri)).getCanonicalFile
+
+  val empty: VSCode_Resources =
+    new VSCode_Resources(Set.empty, Map.empty, Outer_Syntax.empty)
+}
+
+class VSCode_Resources(
+    loaded_theories: Set[String],
+    known_theories: Map[String, Document.Node.Name],
+    base_syntax: Outer_Syntax)
+  extends Resources(loaded_theories, known_theories, base_syntax)
+{
+  def node_name(uri: String): Document.Node.Name =
+  {
+    val file = VSCode_Resources.canonical_file(uri)  // FIXME wellformed!?
+    val node = file.getPath
+    val theory = Thy_Header.thy_name_bootstrap(node).getOrElse("")
+    val master_dir = if (theory == "") "" else file.getParent
+    Document.Node.Name(node, master_dir, theory)
+  }
+}
diff -r f3f457535fe2 -r c6330e16743f src/Tools/jEdit/lib/Tools/jedit
--- a/src/Tools/jEdit/lib/Tools/jedit	Wed Dec 21 11:14:37 2016 +0100
+++ b/src/Tools/jEdit/lib/Tools/jedit	Wed Dec 21 11:14:55 2016 +0100
@@ -40,6 +40,7 @@
   "src/jedit_editor.scala"
   "src/jedit_lib.scala"
   "src/jedit_options.scala"
+  "src/jedit_rendering.scala"
   "src/jedit_resources.scala"
   "src/jedit_sessions.scala"
   "src/keymap_merge.scala"
@@ -53,7 +54,6 @@
   "src/protocol_dockable.scala"
   "src/query_dockable.scala"
   "src/raw_output_dockable.scala"
-  "src/rendering.scala"
   "src/rich_text_area.scala"
   "src/scala_console.scala"
   "src/session_build.scala"
diff -r f3f457535fe2 -r c6330e16743f src/Tools/jEdit/src/bibtex_jedit.scala
--- a/src/Tools/jEdit/src/bibtex_jedit.scala	Wed Dec 21 11:14:37 2016 +0100
+++ b/src/Tools/jEdit/src/bibtex_jedit.scala	Wed Dec 21 11:14:55 2016 +0100
@@ -75,7 +75,7 @@
   def completion(
     history: Completion.History,
     text_area: JEditTextArea,
-    rendering: Rendering): Option[Completion.Result] =
+    rendering: JEdit_Rendering): Option[Completion.Result] =
   {
     for {
       Text.Info(r, name) <- rendering.citation(JEdit_Lib.before_caret_range(text_area, rendering))
diff -r f3f457535fe2 -r c6330e16743f src/Tools/jEdit/src/completion_popup.scala
--- a/src/Tools/jEdit/src/completion_popup.scala	Wed Dec 21 11:14:37 2016 +0100
+++ b/src/Tools/jEdit/src/completion_popup.scala	Wed Dec 21 11:14:55 2016 +0100
@@ -120,7 +120,7 @@
 
     /* rendering */
 
-    def rendering(rendering: Rendering, line_range: Text.Range): Option[Text.Info[Color]] =
+    def rendering(rendering: JEdit_Rendering, line_range: Text.Range): Option[Text.Info[Color]] =
     {
       active_range match {
         case Some(range) => range.try_restrict(line_range)
@@ -153,7 +153,7 @@
     def syntax_completion(
       history: Completion.History,
       explicit: Boolean,
-      opt_rendering: Option[Rendering]): Option[Completion.Result] =
+      opt_rendering: Option[JEdit_Rendering]): Option[Completion.Result] =
     {
       val buffer = text_area.getBuffer
       val decode = Isabelle_Encoding.is_active(buffer)
@@ -185,7 +185,7 @@
 
     /* path completion */
 
-    def path_completion(rendering: Rendering): Option[Completion.Result] =
+    def path_completion(rendering: JEdit_Rendering): Option[Completion.Result] =
     {
       def complete(text: String): List[(String, List[String])] =
       {
@@ -750,7 +750,7 @@
     val size =
     {
       val geometry = JEdit_Lib.window_geometry(completion, completion)
-      val bounds = Rendering.popup_bounds
+      val bounds = JEdit_Rendering.popup_bounds
       val w = geometry.width min (screen.bounds.width * bounds).toInt min layered.getWidth
       val h = geometry.height min (screen.bounds.height * bounds).toInt min layered.getHeight
       new Dimension(w, h)
diff -r f3f457535fe2 -r c6330e16743f src/Tools/jEdit/src/document_view.scala
--- a/src/Tools/jEdit/src/document_view.scala	Wed Dec 21 11:14:37 2016 +0100
+++ b/src/Tools/jEdit/src/document_view.scala	Wed Dec 21 11:14:55 2016 +0100
@@ -60,7 +60,7 @@
 {
   private val session = model.session
 
-  def get_rendering(): Rendering = Rendering(model.snapshot(), PIDE.options.value)
+  def get_rendering(): JEdit_Rendering = JEdit_Rendering(model.snapshot(), PIDE.options.value)
 
   val rich_text_area =
     new Rich_Text_Area(text_area.getView, text_area, get_rendering _, () => (), () => None,
diff -r f3f457535fe2 -r c6330e16743f src/Tools/jEdit/src/fold_handling.scala
--- a/src/Tools/jEdit/src/fold_handling.scala	Wed Dec 21 11:14:37 2016 +0100
+++ b/src/Tools/jEdit/src/fold_handling.scala	Wed Dec 21 11:14:55 2016 +0100
@@ -50,7 +50,7 @@
 
   /* output: static document rendering */
 
-  class Document_Fold_Handler(private val rendering: Rendering)
+  class Document_Fold_Handler(private val rendering: JEdit_Rendering)
     extends FoldHandler("isabelle-document")
   {
     override def equals(other: Any): Boolean =
diff -r f3f457535fe2 -r c6330e16743f src/Tools/jEdit/src/graphview_dockable.scala
--- a/src/Tools/jEdit/src/graphview_dockable.scala	Wed Dec 21 11:14:37 2016 +0100
+++ b/src/Tools/jEdit/src/graphview_dockable.scala	Wed Dec 21 11:14:55 2016 +0100
@@ -68,7 +68,7 @@
           {
             Pretty_Tooltip.invoke(() =>
               {
-                val rendering = Rendering(snapshot, options)
+                val rendering = JEdit_Rendering(snapshot, options)
                 val info = Text.Info(Text.Range(~1), body)
                 Pretty_Tooltip(view, parent, new Point(x, y), rendering, Command.Results.empty, info)
               })
diff -r f3f457535fe2 -r c6330e16743f src/Tools/jEdit/src/jedit_editor.scala
--- a/src/Tools/jEdit/src/jedit_editor.scala	Wed Dec 21 11:14:37 2016 +0100
+++ b/src/Tools/jEdit/src/jedit_editor.scala	Wed Dec 21 11:14:55 2016 +0100
@@ -269,14 +269,13 @@
       case Some(name) =>
         JEdit_Lib.jedit_buffer(name) match {
           case Some(buffer) if offset > 0 =>
-            val (line, column) =
+            val pos =
               JEdit_Lib.buffer_lock(buffer) {
-                ((1, 1) /:
+                (Line.Position.zero /:
                   (Symbol.iterator(JEdit_Lib.buffer_text(buffer)).
-                    zipWithIndex.takeWhile(p => p._2 < offset - 1).map(_._1)))(
-                      Symbol.advance_line_column)
+                    zipWithIndex.takeWhile(p => p._2 < offset - 1).map(_._1)))(_.advance(_))
               }
-            Some(hyperlink_file(focus, name, line, column))
+            Some(hyperlink_file(focus, name, pos.line1, pos.column1))
           case _ => Some(hyperlink_file(focus, name, line))
         }
       case None => None
@@ -297,8 +296,8 @@
             node.commands.iterator.takeWhile(_ != command).map(_.source) ++
               (if (offset == 0) Iterator.empty
                else Iterator.single(command.source(Text.Range(0, command.chunk.decode(offset)))))
-          val (line, column) = ((1, 1) /: sources_iterator)(Symbol.advance_line_column)
-          Some(hyperlink_file(focus, file_name, line, column))
+          val pos = (Line.Position.zero /: sources_iterator)(_.advance(_))
+          Some(hyperlink_file(focus, file_name, pos.line1, pos.column1))
       }
     }
   }
diff -r f3f457535fe2 -r c6330e16743f src/Tools/jEdit/src/jedit_lib.scala
--- a/src/Tools/jEdit/src/jedit_lib.scala	Wed Dec 21 11:14:37 2016 +0100
+++ b/src/Tools/jEdit/src/jedit_lib.scala	Wed Dec 21 11:14:55 2016 +0100
@@ -198,7 +198,7 @@
   def caret_range(text_area: TextArea): Text.Range =
     point_range(text_area.getBuffer, text_area.getCaretPosition)
 
-  def before_caret_range(text_area: TextArea, rendering: Rendering): Text.Range =
+  def before_caret_range(text_area: TextArea, rendering: JEdit_Rendering): Text.Range =
   {
     val snapshot = rendering.snapshot
     val former_caret = snapshot.revert(text_area.getCaretPosition)
diff -r f3f457535fe2 -r c6330e16743f src/Tools/jEdit/src/jedit_rendering.scala
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/src/Tools/jEdit/src/jedit_rendering.scala	Wed Dec 21 11:14:55 2016 +0100
@@ -0,0 +1,802 @@
+/*  Title:      Tools/jEdit/src/jedit_rendering.scala
+    Author:     Makarius
+
+Isabelle/jEdit-specific implementation of quasi-abstract rendering and
+markup interpretation.
+*/
+
+package isabelle.jedit
+
+
+import isabelle._
+
+import java.awt.Color
+import javax.swing.Icon
+
+import org.gjt.sp.jedit.syntax.{Token => JEditToken}
+import org.gjt.sp.jedit.jEdit
+
+import scala.collection.immutable.SortedMap
+
+
+object JEdit_Rendering
+{
+  def apply(snapshot: Document.Snapshot, options: Options): JEdit_Rendering =
+    new JEdit_Rendering(snapshot, options)
+
+
+  /* message priorities */
+
+  private val state_pri = 1
+  private val writeln_pri = 2
+  private val information_pri = 3
+  private val tracing_pri = 4
+  private val warning_pri = 5
+  private val legacy_pri = 6
+  private val error_pri = 7
+
+  private val message_pri = Map(
+    Markup.STATE -> state_pri,
+    Markup.STATE_MESSAGE -> state_pri,
+    Markup.WRITELN -> writeln_pri,
+    Markup.WRITELN_MESSAGE -> writeln_pri,
+    Markup.INFORMATION -> information_pri,
+    Markup.INFORMATION_MESSAGE -> information_pri,
+    Markup.TRACING -> tracing_pri,
+    Markup.TRACING_MESSAGE -> tracing_pri,
+    Markup.WARNING -> warning_pri,
+    Markup.WARNING_MESSAGE -> warning_pri,
+    Markup.LEGACY -> legacy_pri,
+    Markup.LEGACY_MESSAGE -> legacy_pri,
+    Markup.ERROR -> error_pri,
+    Markup.ERROR_MESSAGE -> error_pri)
+
+
+  /* popup window bounds */
+
+  def popup_bounds: Double = (PIDE.options.real("jedit_popup_bounds") max 0.2) min 0.8
+
+
+  /* Isabelle/Isar token markup */
+
+  private val command_style: Map[String, Byte] =
+  {
+    import JEditToken._
+    Map[String, Byte](
+      Keyword.THY_END -> KEYWORD2,
+      Keyword.PRF_ASM -> KEYWORD3,
+      Keyword.PRF_ASM_GOAL -> KEYWORD3
+    ).withDefaultValue(KEYWORD1)
+  }
+
+  private val token_style: Map[Token.Kind.Value, Byte] =
+  {
+    import JEditToken._
+    Map[Token.Kind.Value, Byte](
+      Token.Kind.KEYWORD -> KEYWORD2,
+      Token.Kind.IDENT -> NULL,
+      Token.Kind.LONG_IDENT -> NULL,
+      Token.Kind.SYM_IDENT -> NULL,
+      Token.Kind.VAR -> NULL,
+      Token.Kind.TYPE_IDENT -> NULL,
+      Token.Kind.TYPE_VAR -> NULL,
+      Token.Kind.NAT -> NULL,
+      Token.Kind.FLOAT -> NULL,
+      Token.Kind.SPACE -> NULL,
+      Token.Kind.STRING -> LITERAL1,
+      Token.Kind.ALT_STRING -> LITERAL2,
+      Token.Kind.VERBATIM -> COMMENT3,
+      Token.Kind.CARTOUCHE -> COMMENT4,
+      Token.Kind.COMMENT -> COMMENT1,
+      Token.Kind.ERROR -> INVALID
+    ).withDefaultValue(NULL)
+  }
+
+  def token_markup(syntax: Outer_Syntax, token: Token): Byte =
+    if (token.is_command) command_style(syntax.keywords.kinds.getOrElse(token.content, ""))
+    else if (token.is_keyword && token.source == Symbol.comment_decoded) JEditToken.NULL
+    else if (token.is_delimiter) JEditToken.OPERATOR
+    else token_style(token.kind)
+
+
+  /* Isabelle/ML token markup */
+
+  private val ml_token_style: Map[ML_Lex.Kind.Value, Byte] =
+  {
+    import JEditToken._
+    Map[ML_Lex.Kind.Value, Byte](
+      ML_Lex.Kind.KEYWORD -> NULL,
+      ML_Lex.Kind.IDENT -> NULL,
+      ML_Lex.Kind.LONG_IDENT -> NULL,
+      ML_Lex.Kind.TYPE_VAR -> NULL,
+      ML_Lex.Kind.WORD -> DIGIT,
+      ML_Lex.Kind.INT -> DIGIT,
+      ML_Lex.Kind.REAL -> DIGIT,
+      ML_Lex.Kind.CHAR -> LITERAL2,
+      ML_Lex.Kind.STRING -> LITERAL1,
+      ML_Lex.Kind.SPACE -> NULL,
+      ML_Lex.Kind.COMMENT -> COMMENT1,
+      ML_Lex.Kind.ANTIQ -> NULL,
+      ML_Lex.Kind.ANTIQ_START -> LITERAL4,
+      ML_Lex.Kind.ANTIQ_STOP -> LITERAL4,
+      ML_Lex.Kind.ANTIQ_OTHER -> NULL,
+      ML_Lex.Kind.ANTIQ_STRING -> NULL,
+      ML_Lex.Kind.ANTIQ_ALT_STRING -> NULL,
+      ML_Lex.Kind.ANTIQ_CARTOUCHE -> NULL,
+      ML_Lex.Kind.ERROR -> INVALID
+    ).withDefaultValue(NULL)
+  }
+
+  def ml_token_markup(token: ML_Lex.Token): Byte =
+    if (!token.is_keyword) ml_token_style(token.kind)
+    else if (token.is_delimiter) JEditToken.OPERATOR
+    else if (ML_Lex.keywords2(token.source)) JEditToken.KEYWORD2
+    else if (ML_Lex.keywords3(token.source)) JEditToken.KEYWORD3
+    else JEditToken.KEYWORD1
+
+
+  /* markup elements */
+
+  private val indentation_elements =
+    Markup.Elements(Markup.Command_Indent.name)
+
+  private val semantic_completion_elements =
+    Markup.Elements(Markup.COMPLETION, Markup.NO_COMPLETION)
+
+  private val language_context_elements =
+    Markup.Elements(Markup.STRING, Markup.ALT_STRING, Markup.VERBATIM,
+      Markup.CARTOUCHE, Markup.COMMENT, Markup.LANGUAGE,
+      Markup.ML_STRING, Markup.ML_COMMENT)
+
+  private val language_elements = Markup.Elements(Markup.LANGUAGE)
+
+  private val citation_elements = Markup.Elements(Markup.CITATION)
+
+  private val breakpoint_elements = Markup.Elements(Markup.ML_BREAKPOINT)
+
+  private val caret_focus_elements = Markup.Elements(Markup.ENTITY)
+
+  private val highlight_elements =
+    Markup.Elements(Markup.EXPRESSION, Markup.CITATION, Markup.LANGUAGE, Markup.ML_TYPING,
+      Markup.TOKEN_RANGE, Markup.ENTITY, Markup.PATH, Markup.DOC, Markup.URL, Markup.SORTING,
+      Markup.TYPING, Markup.CLASS_PARAMETER, Markup.FREE, Markup.SKOLEM, Markup.BOUND,
+      Markup.VAR, Markup.TFREE, Markup.TVAR, Markup.ML_BREAKPOINT,
+      Markup.MARKDOWN_PARAGRAPH, Markup.Markdown_List.name)
+
+  private val hyperlink_elements =
+    Markup.Elements(Markup.ENTITY, Markup.PATH, Markup.DOC, Markup.POSITION,
+      Markup.CITATION, Markup.URL)
+
+  private val active_elements =
+    Markup.Elements(Markup.DIALOG, Markup.BROWSER, Markup.GRAPHVIEW,
+      Markup.SENDBACK, Markup.JEDIT_ACTION, Markup.SIMP_TRACE_PANEL)
+
+  private val tooltip_message_elements =
+    Markup.Elements(Markup.WRITELN, Markup.INFORMATION, Markup.WARNING, Markup.LEGACY, Markup.ERROR,
+      Markup.BAD)
+
+  private val gutter_elements =
+    Markup.Elements(Markup.WRITELN, Markup.INFORMATION, Markup.WARNING, Markup.LEGACY, Markup.ERROR)
+
+  private val squiggly_elements =
+    Markup.Elements(Markup.WRITELN, Markup.INFORMATION, Markup.WARNING, Markup.LEGACY, Markup.ERROR)
+
+  private val line_background_elements =
+    Markup.Elements(Markup.WRITELN_MESSAGE, Markup.STATE_MESSAGE, Markup.INFORMATION_MESSAGE,
+      Markup.TRACING_MESSAGE, Markup.WARNING_MESSAGE, Markup.LEGACY_MESSAGE,
+      Markup.ERROR_MESSAGE)
+
+  private val separator_elements =
+    Markup.Elements(Markup.SEPARATOR)
+
+  private val background_elements =
+    Protocol.proper_status_elements + Markup.WRITELN_MESSAGE +
+      Markup.STATE_MESSAGE + Markup.INFORMATION_MESSAGE +
+      Markup.TRACING_MESSAGE + Markup.WARNING_MESSAGE +
+      Markup.LEGACY_MESSAGE + Markup.ERROR_MESSAGE +
+      Markup.BAD + Markup.INTENSIFY + Markup.ENTITY +
+      Markup.Markdown_Item.name ++ active_elements
+
+  private val foreground_elements =
+    Markup.Elements(Markup.STRING, Markup.ALT_STRING, Markup.VERBATIM,
+      Markup.CARTOUCHE, Markup.ANTIQUOTED)
+
+  private val bullet_elements =
+    Markup.Elements(Markup.BULLET, Markup.ML_BREAKPOINT)
+
+  private val fold_depth_elements =
+    Markup.Elements(Markup.TEXT_FOLD, Markup.GOAL, Markup.SUBGOAL)
+}
+
+
+class JEdit_Rendering(snapshot: Document.Snapshot, options: Options)
+  extends Rendering(snapshot, options, PIDE.resources)
+{
+  /* colors */
+
+  def color_value(s: String): Color = Color_Value(options.string(s))
+
+  val outdated_color = color_value("outdated_color")
+  val unprocessed_color = color_value("unprocessed_color")
+  val unprocessed1_color = color_value("unprocessed1_color")
+  val running_color = color_value("running_color")
+  val running1_color = color_value("running1_color")
+  val bullet_color = color_value("bullet_color")
+  val tooltip_color = color_value("tooltip_color")
+  val writeln_color = color_value("writeln_color")
+  val information_color = color_value("information_color")
+  val warning_color = color_value("warning_color")
+  val legacy_color = color_value("legacy_color")
+  val error_color = color_value("error_color")
+  val writeln_message_color = color_value("writeln_message_color")
+  val information_message_color = color_value("information_message_color")
+  val tracing_message_color = color_value("tracing_message_color")
+  val warning_message_color = color_value("warning_message_color")
+  val legacy_message_color = color_value("legacy_message_color")
+  val error_message_color = color_value("error_message_color")
+  val spell_checker_color = color_value("spell_checker_color")
+  val bad_color = color_value("bad_color")
+  val intensify_color = color_value("intensify_color")
+  val entity_color = color_value("entity_color")
+  val entity_ref_color = color_value("entity_ref_color")
+  val breakpoint_disabled_color = color_value("breakpoint_disabled_color")
+  val breakpoint_enabled_color = color_value("breakpoint_enabled_color")
+  val caret_debugger_color = color_value("caret_debugger_color")
+  val quoted_color = color_value("quoted_color")
+  val antiquoted_color = color_value("antiquoted_color")
+  val antiquote_color = color_value("antiquote_color")
+  val highlight_color = color_value("highlight_color")
+  val hyperlink_color = color_value("hyperlink_color")
+  val active_color = color_value("active_color")
+  val active_hover_color = color_value("active_hover_color")
+  val active_result_color = color_value("active_result_color")
+  val keyword1_color = color_value("keyword1_color")
+  val keyword2_color = color_value("keyword2_color")
+  val keyword3_color = color_value("keyword3_color")
+  val quasi_keyword_color = color_value("quasi_keyword_color")
+  val improper_color = color_value("improper_color")
+  val operator_color = color_value("operator_color")
+  val caret_invisible_color = color_value("caret_invisible_color")
+  val completion_color = color_value("completion_color")
+  val search_color = color_value("search_color")
+
+  val tfree_color = color_value("tfree_color")
+  val tvar_color = color_value("tvar_color")
+  val free_color = color_value("free_color")
+  val skolem_color = color_value("skolem_color")
+  val bound_color = color_value("bound_color")
+  val var_color = color_value("var_color")
+  val inner_numeral_color = color_value("inner_numeral_color")
+  val inner_quoted_color = color_value("inner_quoted_color")
+  val inner_cartouche_color = color_value("inner_cartouche_color")
+  val inner_comment_color = color_value("inner_comment_color")
+  val dynamic_color = color_value("dynamic_color")
+  val class_parameter_color = color_value("class_parameter_color")
+
+  val markdown_item_color1 = color_value("markdown_item_color1")
+  val markdown_item_color2 = color_value("markdown_item_color2")
+  val markdown_item_color3 = color_value("markdown_item_color3")
+  val markdown_item_color4 = color_value("markdown_item_color4")
+
+
+  /* indentation */
+
+  def indentation(range: Text.Range): Int =
+    snapshot.select(range, JEdit_Rendering.indentation_elements, _ =>
+      {
+        case Text.Info(_, XML.Elem(Markup.Command_Indent(i), _)) => Some(i)
+        case _ => None
+      }).headOption.map(_.info).getOrElse(0)
+
+
+  /* completion */
+
+  def semantic_completion(completed_range: Option[Text.Range], range: Text.Range)
+      : Option[Text.Info[Completion.Semantic]] =
+    if (snapshot.is_outdated) None
+    else {
+      snapshot.select(range, JEdit_Rendering.semantic_completion_elements, _ =>
+        {
+          case Completion.Semantic.Info(info) =>
+            completed_range match {
+              case Some(range0) if range0.contains(info.range) && range0 != info.range => None
+              case _ => Some(info)
+            }
+          case _ => None
+        }).headOption.map(_.info)
+    }
+
+  def language_context(range: Text.Range): Option[Completion.Language_Context] =
+    snapshot.select(range, JEdit_Rendering.language_context_elements, _ =>
+      {
+        case Text.Info(_, XML.Elem(Markup.Language(language, symbols, antiquotes, delimited), _)) =>
+          if (delimited) Some(Completion.Language_Context(language, symbols, antiquotes))
+          else None
+        case Text.Info(_, elem)
+        if elem.name == Markup.ML_STRING || elem.name == Markup.ML_COMMENT =>
+          Some(Completion.Language_Context.ML_inner)
+        case Text.Info(_, _) =>
+          Some(Completion.Language_Context.inner)
+      }).headOption.map(_.info)
+
+  def language_path(range: Text.Range): Option[Text.Range] =
+    snapshot.select(range, JEdit_Rendering.language_elements, _ =>
+      {
+        case Text.Info(info_range, XML.Elem(Markup.Language(Markup.Language.PATH, _, _, _), _)) =>
+          Some(snapshot.convert(info_range))
+        case _ => None
+      }).headOption.map(_.info)
+
+  def citation(range: Text.Range): Option[Text.Info[String]] =
+    snapshot.select(range, JEdit_Rendering.citation_elements, _ =>
+      {
+        case Text.Info(info_range, XML.Elem(Markup.Citation(name), _)) =>
+          Some(Text.Info(snapshot.convert(info_range), name))
+        case _ => None
+      }).headOption.map(_.info)
+
+
+  /* spell checker */
+
+  private lazy val spell_checker_elements =
+    Markup.Elements(space_explode(',', options.string("spell_checker_elements")): _*)
+
+  def spell_checker_ranges(range: Text.Range): List[Text.Range] =
+    snapshot.select(range, spell_checker_elements, _ => _ => Some(())).map(_.range)
+
+  def spell_checker_point(range: Text.Range): Option[Text.Range] =
+    snapshot.select(range, spell_checker_elements, _ =>
+      {
+        case info => Some(snapshot.convert(info.range))
+      }).headOption.map(_.info)
+
+
+  /* breakpoints */
+
+  def breakpoint(range: Text.Range): Option[(Command, Long)] =
+    if (snapshot.is_outdated) None
+    else
+      snapshot.select(range, JEdit_Rendering.breakpoint_elements, command_states =>
+        {
+          case Text.Info(_, Protocol.ML_Breakpoint(breakpoint)) =>
+            command_states match {
+              case st :: _ => Some((st.command, breakpoint))
+              case _ => None
+            }
+          case _ => None
+        }).headOption.map(_.info)
+
+
+  /* command status overview */
+
+  def overview_color(range: Text.Range): Option[Color] =
+  {
+    if (snapshot.is_outdated) None
+    else {
+      val results =
+        snapshot.cumulate[List[Markup]](range, Nil, Protocol.liberal_status_elements, _ =>
+          {
+            case (status, Text.Info(_, elem)) => Some(elem.markup :: status)
+          }, status = true)
+      if (results.isEmpty) None
+      else {
+        val status = Protocol.Status.make(results.iterator.flatMap(_.info))
+
+        if (status.is_running) Some(running_color)
+        else if (status.is_failed) Some(error_color)
+        else if (status.is_warned) Some(warning_color)
+        else if (status.is_unprocessed) Some(unprocessed_color)
+        else None
+      }
+    }
+  }
+
+
+  /* caret focus */
+
+  def entity_focus(range: Text.Range,
+    check: (Boolean, Long) => Boolean = (is_def: Boolean, i: Long) => is_def): Set[Long] =
+  {
+    val results =
+      snapshot.cumulate[Set[Long]](range, Set.empty, JEdit_Rendering.caret_focus_elements, _ =>
+          {
+            case (serials, Text.Info(_, XML.Elem(Markup(Markup.ENTITY, props), _))) =>
+              props match {
+                case Markup.Entity.Def(i) if check(true, i) => Some(serials + i)
+                case Markup.Entity.Ref(i) if check(false, i) => Some(serials + i)
+                case _ => None
+              }
+            case _ => None
+          })
+    (Set.empty[Long] /: results){ case (s1, Text.Info(_, s2)) => s1 ++ s2 }
+  }
+
+  def caret_focus(caret_range: Text.Range, visible_range: Text.Range): Set[Long] =
+  {
+    val focus_defs = entity_focus(caret_range)
+    if (focus_defs.nonEmpty) focus_defs
+    else {
+      val visible_defs = entity_focus(visible_range)
+      entity_focus(caret_range, (is_def: Boolean, i: Long) => !is_def && visible_defs.contains(i))
+    }
+  }
+
+  def caret_focus_ranges(caret_range: Text.Range, visible_range: Text.Range): List[Text.Range] =
+  {
+    val focus = caret_focus(caret_range, visible_range)
+    if (focus.nonEmpty) {
+      val results =
+        snapshot.cumulate[Boolean](visible_range, false, JEdit_Rendering.caret_focus_elements, _ =>
+          {
+            case (_, Text.Info(_, XML.Elem(Markup(Markup.ENTITY, props), _))) =>
+              props match {
+                case Markup.Entity.Def(i) if focus(i) => Some(true)
+                case Markup.Entity.Ref(i) if focus(i) => Some(true)
+                case _ => None
+              }
+          })
+      for (info <- results if info.info) yield info.range
+    }
+    else Nil
+  }
+
+  def entity_ref(range: Text.Range, focus: Set[Long]): List[Text.Info[Color]] =
+    snapshot.select(range, JEdit_Rendering.caret_focus_elements, _ =>
+      {
+        case Text.Info(_, XML.Elem(Markup(Markup.ENTITY, Markup.Entity.Ref(i)), _)) if focus(i) =>
+          Some(entity_ref_color)
+        case _ => None
+      })
+
+
+  /* highlighted area */
+
+  def highlight(range: Text.Range): Option[Text.Info[Color]] =
+    snapshot.select(range, JEdit_Rendering.highlight_elements, _ =>
+      {
+        case info => Some(Text.Info(snapshot.convert(info.range), highlight_color))
+      }).headOption.map(_.info)
+
+
+  /* hyperlinks */
+
+  def hyperlink(range: Text.Range): Option[Text.Info[PIDE.editor.Hyperlink]] =
+  {
+    snapshot.cumulate[Vector[Text.Info[PIDE.editor.Hyperlink]]](
+      range, Vector.empty, JEdit_Rendering.hyperlink_elements, _ =>
+        {
+          case (links, Text.Info(info_range, XML.Elem(Markup.Path(name), _))) =>
+            val link = PIDE.editor.hyperlink_file(true, resolve_file(name))
+            Some(links :+ Text.Info(snapshot.convert(info_range), link))
+
+          case (links, Text.Info(info_range, XML.Elem(Markup.Doc(name), _))) =>
+            PIDE.editor.hyperlink_doc(name).map(link =>
+              (links :+ Text.Info(snapshot.convert(info_range), link)))
+
+          case (links, Text.Info(info_range, XML.Elem(Markup.Url(name), _))) =>
+            val link = PIDE.editor.hyperlink_url(name)
+            Some(links :+ Text.Info(snapshot.convert(info_range), link))
+
+          case (links, Text.Info(info_range, XML.Elem(Markup(Markup.ENTITY, props), _)))
+          if !props.exists(
+            { case (Markup.KIND, Markup.ML_OPEN) => true
+              case (Markup.KIND, Markup.ML_STRUCTURE) => true
+              case _ => false }) =>
+            val opt_link = PIDE.editor.hyperlink_def_position(true, snapshot, props)
+            opt_link.map(link => links :+ Text.Info(snapshot.convert(info_range), link))
+
+          case (links, Text.Info(info_range, XML.Elem(Markup(Markup.POSITION, props), _))) =>
+            val opt_link = PIDE.editor.hyperlink_position(true, snapshot, props)
+            opt_link.map(link => links :+ Text.Info(snapshot.convert(info_range), link))
+
+          case (links, Text.Info(info_range, XML.Elem(Markup.Citation(name), _))) =>
+            val opt_link =
+              Bibtex_JEdit.entries_iterator.collectFirst(
+                { case (a, buffer, offset) if a == name =>
+                    PIDE.editor.hyperlink_buffer(true, buffer, offset) })
+            opt_link.map(link => links :+ Text.Info(snapshot.convert(info_range), link))
+
+          case _ => None
+        }) match { case Text.Info(_, _ :+ info) :: _ => Some(info) case _ => None }
+  }
+
+
+  /* active elements */
+
+  def active(range: Text.Range): Option[Text.Info[XML.Elem]] =
+    snapshot.select(range, JEdit_Rendering.active_elements, command_states =>
+      {
+        case Text.Info(info_range, elem) =>
+          if (elem.name == Markup.DIALOG) {
+            elem match {
+              case Protocol.Dialog(_, serial, _)
+              if !command_states.exists(st => st.results.defined(serial)) =>
+                Some(Text.Info(snapshot.convert(info_range), elem))
+              case _ => None
+            }
+          }
+          else Some(Text.Info(snapshot.convert(info_range), elem))
+      }).headOption.map(_.info)
+
+  def command_results(range: Text.Range): Command.Results =
+    Command.State.merge_results(
+      snapshot.select[List[Command.State]](range, Markup.Elements.full, command_states =>
+        { case _ => Some(command_states) }).flatMap(_.info))
+
+
+  /* tooltip messages */
+
+  def tooltip_message(range: Text.Range): Option[Text.Info[XML.Body]] =
+  {
+    val results =
+      snapshot.cumulate[List[Text.Info[Command.Results.Entry]]](
+        range, Nil, JEdit_Rendering.tooltip_message_elements, _ =>
+        {
+          case (msgs, Text.Info(info_range, msg @ XML.Elem(Markup(Markup.BAD, _), body)))
+          if body.nonEmpty =>
+            val entry: Command.Results.Entry = (Document_ID.make(), msg)
+            Some(Text.Info(snapshot.convert(info_range), entry) :: msgs)
+
+          case (msgs, Text.Info(info_range,
+            XML.Elem(Markup(name, props @ Markup.Serial(serial)), body))) =>
+            val entry: Command.Results.Entry =
+              serial -> XML.Elem(Markup(Markup.message(name), props), body)
+            Some(Text.Info(snapshot.convert(info_range), entry) :: msgs)
+
+          case _ => None
+        }).flatMap(_.info)
+    if (results.isEmpty) None
+    else {
+      val r = Text.Range(results.head.range.start, results.last.range.stop)
+      val msgs = Command.Results.make(results.map(_.info))
+      Some(Text.Info(r, Pretty.separate(msgs.iterator.map(_._2).toList)))
+    }
+  }
+
+
+  /* tooltips */
+
+  def tooltip_margin: Int = options.int("jedit_tooltip_margin")
+  def timing_threshold: Double = options.real("jedit_timing_threshold")
+
+  lazy val tooltip_close_icon = JEdit_Lib.load_icon(options.string("tooltip_close_icon"))
+  lazy val tooltip_detach_icon = JEdit_Lib.load_icon(options.string("tooltip_detach_icon"))
+
+
+  /* gutter */
+
+  private def gutter_message_pri(msg: XML.Tree): Int =
+    if (Protocol.is_error(msg)) JEdit_Rendering.error_pri
+    else if (Protocol.is_legacy(msg)) JEdit_Rendering.legacy_pri
+    else if (Protocol.is_warning(msg)) JEdit_Rendering.warning_pri
+    else if (Protocol.is_information(msg)) JEdit_Rendering.information_pri
+    else 0
+
+  private lazy val gutter_message_content = Map(
+    JEdit_Rendering.information_pri ->
+      (JEdit_Lib.load_icon(options.string("gutter_information_icon")), information_message_color),
+    JEdit_Rendering.warning_pri ->
+      (JEdit_Lib.load_icon(options.string("gutter_warning_icon")), warning_message_color),
+    JEdit_Rendering.legacy_pri ->
+      (JEdit_Lib.load_icon(options.string("gutter_legacy_icon")), warning_message_color),
+    JEdit_Rendering.error_pri ->
+      (JEdit_Lib.load_icon(options.string("gutter_error_icon")), error_message_color))
+
+  def gutter_content(range: Text.Range): Option[(Icon, Color)] =
+  {
+    val pris =
+      snapshot.cumulate[Int](range, 0, JEdit_Rendering.gutter_elements, _ =>
+        {
+          case (pri, Text.Info(_, msg @ XML.Elem(Markup(_, Markup.Serial(serial)), _))) =>
+            Some(pri max gutter_message_pri(msg))
+          case _ => None
+        }).map(_.info)
+
+    gutter_message_content.get((0 /: pris)(_ max _))
+  }
+
+
+  /* squiggly underline */
+
+  private lazy val squiggly_colors = Map(
+    JEdit_Rendering.writeln_pri -> writeln_color,
+    JEdit_Rendering.information_pri -> information_color,
+    JEdit_Rendering.warning_pri -> warning_color,
+    JEdit_Rendering.legacy_pri -> legacy_color,
+    JEdit_Rendering.error_pri -> error_color)
+
+  def squiggly_underline(range: Text.Range): List[Text.Info[Color]] =
+  {
+    val results =
+      snapshot.cumulate[Int](range, 0, JEdit_Rendering.squiggly_elements, _ =>
+        {
+          case (pri, Text.Info(_, elem)) => Some(pri max JEdit_Rendering.message_pri(elem.name))
+        })
+    for {
+      Text.Info(r, pri) <- results
+      color <- squiggly_colors.get(pri)
+    } yield Text.Info(r, color)
+  }
+
+
+  /* message output */
+
+  private lazy val message_colors = Map(
+    JEdit_Rendering.writeln_pri -> writeln_message_color,
+    JEdit_Rendering.information_pri -> information_message_color,
+    JEdit_Rendering.tracing_pri -> tracing_message_color,
+    JEdit_Rendering.warning_pri -> warning_message_color,
+    JEdit_Rendering.legacy_pri -> legacy_message_color,
+    JEdit_Rendering.error_pri -> error_message_color)
+
+  def line_background(range: Text.Range): Option[(Color, Boolean)] =
+  {
+    val results =
+      snapshot.cumulate[Int](range, 0, JEdit_Rendering.line_background_elements, _ =>
+        {
+          case (pri, Text.Info(_, elem)) => Some(pri max JEdit_Rendering.message_pri(elem.name))
+        })
+    val pri = (0 /: results) { case (p1, Text.Info(_, p2)) => p1 max p2 }
+
+    message_colors.get(pri).map(message_color =>
+      {
+        val is_separator =
+          snapshot.cumulate[Boolean](range, false, JEdit_Rendering.separator_elements, _ =>
+            {
+              case _ => Some(true)
+            }).exists(_.info)
+        (message_color, is_separator)
+      })
+  }
+
+  def output_messages(results: Command.Results): List[XML.Tree] =
+  {
+    val (states, other) =
+      results.iterator.map(_._2).filterNot(Protocol.is_result(_)).toList
+        .partition(Protocol.is_state(_))
+    states ::: other
+  }
+
+
+  /* text background */
+
+  def background(range: Text.Range, focus: Set[Long]): List[Text.Info[Color]] =
+  {
+    for {
+      Text.Info(r, result) <-
+        snapshot.cumulate[(List[Markup], Option[Color])](
+          range, (List(Markup.Empty), None), JEdit_Rendering.background_elements,
+          command_states =>
+            {
+              case (((status, color), Text.Info(_, XML.Elem(markup, _))))
+              if status.nonEmpty && Protocol.proper_status_elements(markup.name) =>
+                Some((markup :: status, color))
+              case (_, Text.Info(_, XML.Elem(Markup(Markup.BAD, _), _))) =>
+                Some((Nil, Some(bad_color)))
+              case (_, Text.Info(_, XML.Elem(Markup(Markup.INTENSIFY, _), _))) =>
+                Some((Nil, Some(intensify_color)))
+              case (_, Text.Info(_, XML.Elem(Markup(Markup.ENTITY, props), _))) =>
+                props match {
+                  case Markup.Entity.Def(i) if focus(i) => Some((Nil, Some(entity_color)))
+                  case Markup.Entity.Ref(i) if focus(i) => Some((Nil, Some(entity_color)))
+                  case _ => None
+                }
+              case (_, Text.Info(_, XML.Elem(Markup.Markdown_Item(depth), _))) =>
+                val color =
+                  depth match {
+                    case 1 => markdown_item_color1
+                    case 2 => markdown_item_color2
+                    case 3 => markdown_item_color3
+                    case _ => markdown_item_color4
+                  }
+                Some((Nil, Some(color)))
+              case (acc, Text.Info(_, Protocol.Dialog(_, serial, result))) =>
+                command_states.collectFirst(
+                  { case st if st.results.defined(serial) => st.results.get(serial).get }) match
+                {
+                  case Some(Protocol.Dialog_Result(res)) if res == result =>
+                    Some((Nil, Some(active_result_color)))
+                  case _ =>
+                    Some((Nil, Some(active_color)))
+                }
+              case (_, Text.Info(_, elem)) =>
+                if (JEdit_Rendering.active_elements(elem.name)) Some((Nil, Some(active_color)))
+                else None
+            })
+      color <-
+        (result match {
+          case (markups, opt_color) if markups.nonEmpty =>
+            val status = Protocol.Status.make(markups.iterator)
+            if (status.is_unprocessed) Some(unprocessed1_color)
+            else if (status.is_running) Some(running1_color)
+            else opt_color
+          case (_, opt_color) => opt_color
+        })
+    } yield Text.Info(r, color)
+  }
+
+
+  /* text foreground */
+
+  def foreground(range: Text.Range): List[Text.Info[Color]] =
+    snapshot.select(range, JEdit_Rendering.foreground_elements, _ =>
+      {
+        case Text.Info(_, elem) =>
+          if (elem.name == Markup.ANTIQUOTED) Some(antiquoted_color) else Some(quoted_color)
+      })
+
+
+  /* text color */
+
+  val foreground_color = jEdit.getColorProperty("view.fgColor")
+
+  private lazy val text_colors: Map[String, Color] = Map(
+      Markup.KEYWORD1 -> keyword1_color,
+      Markup.KEYWORD2 -> keyword2_color,
+      Markup.KEYWORD3 -> keyword3_color,
+      Markup.QUASI_KEYWORD -> quasi_keyword_color,
+      Markup.IMPROPER -> improper_color,
+      Markup.OPERATOR -> operator_color,
+      Markup.STRING -> foreground_color,
+      Markup.ALT_STRING -> foreground_color,
+      Markup.VERBATIM -> foreground_color,
+      Markup.CARTOUCHE -> foreground_color,
+      Markup.LITERAL -> keyword1_color,
+      Markup.DELIMITER -> foreground_color,
+      Markup.TFREE -> tfree_color,
+      Markup.TVAR -> tvar_color,
+      Markup.FREE -> free_color,
+      Markup.SKOLEM -> skolem_color,
+      Markup.BOUND -> bound_color,
+      Markup.VAR -> var_color,
+      Markup.INNER_STRING -> inner_quoted_color,
+      Markup.INNER_CARTOUCHE -> inner_cartouche_color,
+      Markup.INNER_COMMENT -> inner_comment_color,
+      Markup.DYNAMIC_FACT -> dynamic_color,
+      Markup.CLASS_PARAMETER -> class_parameter_color,
+      Markup.ANTIQUOTE -> antiquote_color,
+      Markup.ML_KEYWORD1 -> keyword1_color,
+      Markup.ML_KEYWORD2 -> keyword2_color,
+      Markup.ML_KEYWORD3 -> keyword3_color,
+      Markup.ML_DELIMITER -> foreground_color,
+      Markup.ML_NUMERAL -> inner_numeral_color,
+      Markup.ML_CHAR -> inner_quoted_color,
+      Markup.ML_STRING -> inner_quoted_color,
+      Markup.ML_COMMENT -> inner_comment_color,
+      Markup.SML_STRING -> inner_quoted_color,
+      Markup.SML_COMMENT -> inner_comment_color)
+
+  private lazy val text_color_elements =
+    Markup.Elements(text_colors.keySet)
+
+  def text_color(range: Text.Range, color: Color): List[Text.Info[Color]] =
+  {
+    if (color == Token_Markup.hidden_color) List(Text.Info(range, color))
+    else
+      snapshot.cumulate(range, color, text_color_elements, _ =>
+        {
+          case (_, Text.Info(_, elem)) => text_colors.get(elem.name)
+        })
+  }
+
+
+  /* virtual bullets */
+
+  def bullet(range: Text.Range): List[Text.Info[Color]] =
+    snapshot.select(range, JEdit_Rendering.bullet_elements, _ =>
+      {
+        case Text.Info(_, Protocol.ML_Breakpoint(breakpoint)) =>
+          Debugger.active_breakpoint_state(breakpoint).map(b =>
+            if (b) breakpoint_enabled_color else breakpoint_disabled_color)
+        case _ => Some(bullet_color)
+      })
+
+
+  /* text folds */
+
+  def fold_depth(range: Text.Range): List[Text.Info[Int]] =
+    snapshot.cumulate[Int](range, 0, JEdit_Rendering.fold_depth_elements, _ =>
+      {
+        case (depth, _) => Some(depth + 1)
+      })
+}
diff -r f3f457535fe2 -r c6330e16743f src/Tools/jEdit/src/output_dockable.scala
--- a/src/Tools/jEdit/src/output_dockable.scala	Wed Dec 21 11:14:37 2016 +0100
+++ b/src/Tools/jEdit/src/output_dockable.scala	Wed Dec 21 11:14:55 2016 +0100
@@ -66,7 +66,7 @@
 
     val new_output =
       if (!restriction.isDefined || restriction.get.contains(new_command)) {
-        val rendering = Rendering(new_snapshot, PIDE.options.value)
+        val rendering = JEdit_Rendering(new_snapshot, PIDE.options.value)
         rendering.output_messages(new_results)
       }
       else current_output
diff -r f3f457535fe2 -r c6330e16743f src/Tools/jEdit/src/plugin.scala
--- a/src/Tools/jEdit/src/plugin.scala	Wed Dec 21 11:14:37 2016 +0100
+++ b/src/Tools/jEdit/src/plugin.scala	Wed Dec 21 11:14:55 2016 +0100
@@ -158,7 +158,7 @@
     }
   }
 
-  def rendering(view: View): Rendering = GUI_Thread.now
+  def rendering(view: View): JEdit_Rendering = GUI_Thread.now
   {
     val text_area = view.getTextArea
     document_view(text_area) match {
diff -r f3f457535fe2 -r c6330e16743f src/Tools/jEdit/src/pretty_text_area.scala
--- a/src/Tools/jEdit/src/pretty_text_area.scala	Wed Dec 21 11:14:37 2016 +0100
+++ b/src/Tools/jEdit/src/pretty_text_area.scala	Wed Dec 21 11:14:55 2016 +0100
@@ -54,10 +54,10 @@
   }
 
   private def text_rendering(base_snapshot: Document.Snapshot, base_results: Command.Results,
-    formatted_body: XML.Body): (String, Rendering) =
+    formatted_body: XML.Body): (String, JEdit_Rendering) =
   {
     val (text, state) = document_state(base_snapshot, base_results, formatted_body)
-    val rendering = Rendering(state.snapshot(), PIDE.options.value)
+    val rendering = JEdit_Rendering(state.snapshot(), PIDE.options.value)
     (text, rendering)
   }
 }
@@ -75,7 +75,7 @@
   private var current_body: XML.Body = Nil
   private var current_base_snapshot = Document.Snapshot.init
   private var current_base_results = Command.Results.empty
-  private var current_rendering: Rendering =
+  private var current_rendering: JEdit_Rendering =
     Pretty_Text_Area.text_rendering(current_base_snapshot, current_base_results, Nil)._2
   private var future_refresh: Option[Future[Unit]] = None
 
diff -r f3f457535fe2 -r c6330e16743f src/Tools/jEdit/src/pretty_tooltip.scala
--- a/src/Tools/jEdit/src/pretty_tooltip.scala	Wed Dec 21 11:14:37 2016 +0100
+++ b/src/Tools/jEdit/src/pretty_tooltip.scala	Wed Dec 21 11:14:55 2016 +0100
@@ -43,7 +43,7 @@
     view: View,
     parent: JComponent,
     location: Point,
-    rendering: Rendering,
+    rendering: JEdit_Rendering,
     results: Command.Results,
     info: Text.Info[XML.Body])
   {
@@ -167,7 +167,7 @@
   layered: JLayeredPane,
   val original_parent: JComponent,
   location: Point,
-  rendering: Rendering,
+  rendering: JEdit_Rendering,
   private val results: Command.Results,
   private val info: Text.Info[XML.Body]) extends JPanel(new BorderLayout)
 {
@@ -246,7 +246,7 @@
     val screen = JEdit_Lib.screen_location(layered, location)
     val size =
     {
-      val bounds = Rendering.popup_bounds
+      val bounds = JEdit_Rendering.popup_bounds
 
       val w_max = layered.getWidth min (screen.bounds.width * bounds).toInt
       val h_max = layered.getHeight min (screen.bounds.height * bounds).toInt
diff -r f3f457535fe2 -r c6330e16743f src/Tools/jEdit/src/rendering.scala
--- a/src/Tools/jEdit/src/rendering.scala	Wed Dec 21 11:14:37 2016 +0100
+++ /dev/null	Thu Jan 01 00:00:00 1970 +0000
@@ -1,923 +0,0 @@
-/*  Title:      Tools/jEdit/src/rendering.scala
-    Author:     Makarius
-
-Isabelle-specific implementation of quasi-abstract rendering and
-markup interpretation.
-*/
-
-package isabelle.jedit
-
-
-import isabelle._
-
-import java.awt.Color
-import javax.swing.Icon
-
-import org.gjt.sp.jedit.syntax.{Token => JEditToken}
-import org.gjt.sp.jedit.jEdit
-
-import scala.collection.immutable.SortedMap
-
-
-object Rendering
-{
-  def apply(snapshot: Document.Snapshot, options: Options): Rendering =
-    new Rendering(snapshot, options)
-
-
-  /* message priorities */
-
-  private val state_pri = 1
-  private val writeln_pri = 2
-  private val information_pri = 3
-  private val tracing_pri = 4
-  private val warning_pri = 5
-  private val legacy_pri = 6
-  private val error_pri = 7
-
-  private val message_pri = Map(
-    Markup.STATE -> state_pri,
-    Markup.STATE_MESSAGE -> state_pri,
-    Markup.WRITELN -> writeln_pri,
-    Markup.WRITELN_MESSAGE -> writeln_pri,
-    Markup.INFORMATION -> information_pri,
-    Markup.INFORMATION_MESSAGE -> information_pri,
-    Markup.TRACING -> tracing_pri,
-    Markup.TRACING_MESSAGE -> tracing_pri,
-    Markup.WARNING -> warning_pri,
-    Markup.WARNING_MESSAGE -> warning_pri,
-    Markup.LEGACY -> legacy_pri,
-    Markup.LEGACY_MESSAGE -> legacy_pri,
-    Markup.ERROR -> error_pri,
-    Markup.ERROR_MESSAGE -> error_pri)
-
-
-  /* popup window bounds */
-
-  def popup_bounds: Double = (PIDE.options.real("jedit_popup_bounds") max 0.2) min 0.8
-
-
-  /* Isabelle/Isar token markup */
-
-  private val command_style: Map[String, Byte] =
-  {
-    import JEditToken._
-    Map[String, Byte](
-      Keyword.THY_END -> KEYWORD2,
-      Keyword.PRF_ASM -> KEYWORD3,
-      Keyword.PRF_ASM_GOAL -> KEYWORD3
-    ).withDefaultValue(KEYWORD1)
-  }
-
-  private val token_style: Map[Token.Kind.Value, Byte] =
-  {
-    import JEditToken._
-    Map[Token.Kind.Value, Byte](
-      Token.Kind.KEYWORD -> KEYWORD2,
-      Token.Kind.IDENT -> NULL,
-      Token.Kind.LONG_IDENT -> NULL,
-      Token.Kind.SYM_IDENT -> NULL,
-      Token.Kind.VAR -> NULL,
-      Token.Kind.TYPE_IDENT -> NULL,
-      Token.Kind.TYPE_VAR -> NULL,
-      Token.Kind.NAT -> NULL,
-      Token.Kind.FLOAT -> NULL,
-      Token.Kind.SPACE -> NULL,
-      Token.Kind.STRING -> LITERAL1,
-      Token.Kind.ALT_STRING -> LITERAL2,
-      Token.Kind.VERBATIM -> COMMENT3,
-      Token.Kind.CARTOUCHE -> COMMENT4,
-      Token.Kind.COMMENT -> COMMENT1,
-      Token.Kind.ERROR -> INVALID
-    ).withDefaultValue(NULL)
-  }
-
-  def token_markup(syntax: Outer_Syntax, token: Token): Byte =
-    if (token.is_command) command_style(syntax.keywords.kinds.getOrElse(token.content, ""))
-    else if (token.is_keyword && token.source == Symbol.comment_decoded) JEditToken.NULL
-    else if (token.is_delimiter) JEditToken.OPERATOR
-    else token_style(token.kind)
-
-
-  /* Isabelle/ML token markup */
-
-  private val ml_token_style: Map[ML_Lex.Kind.Value, Byte] =
-  {
-    import JEditToken._
-    Map[ML_Lex.Kind.Value, Byte](
-      ML_Lex.Kind.KEYWORD -> NULL,
-      ML_Lex.Kind.IDENT -> NULL,
-      ML_Lex.Kind.LONG_IDENT -> NULL,
-      ML_Lex.Kind.TYPE_VAR -> NULL,
-      ML_Lex.Kind.WORD -> DIGIT,
-      ML_Lex.Kind.INT -> DIGIT,
-      ML_Lex.Kind.REAL -> DIGIT,
-      ML_Lex.Kind.CHAR -> LITERAL2,
-      ML_Lex.Kind.STRING -> LITERAL1,
-      ML_Lex.Kind.SPACE -> NULL,
-      ML_Lex.Kind.COMMENT -> COMMENT1,
-      ML_Lex.Kind.ANTIQ -> NULL,
-      ML_Lex.Kind.ANTIQ_START -> LITERAL4,
-      ML_Lex.Kind.ANTIQ_STOP -> LITERAL4,
-      ML_Lex.Kind.ANTIQ_OTHER -> NULL,
-      ML_Lex.Kind.ANTIQ_STRING -> NULL,
-      ML_Lex.Kind.ANTIQ_ALT_STRING -> NULL,
-      ML_Lex.Kind.ANTIQ_CARTOUCHE -> NULL,
-      ML_Lex.Kind.ERROR -> INVALID
-    ).withDefaultValue(NULL)
-  }
-
-  def ml_token_markup(token: ML_Lex.Token): Byte =
-    if (!token.is_keyword) ml_token_style(token.kind)
-    else if (token.is_delimiter) JEditToken.OPERATOR
-    else if (ML_Lex.keywords2(token.source)) JEditToken.KEYWORD2
-    else if (ML_Lex.keywords3(token.source)) JEditToken.KEYWORD3
-    else JEditToken.KEYWORD1
-
-
-  /* markup elements */
-
-  private val indentation_elements =
-    Markup.Elements(Markup.Command_Indent.name)
-
-  private val semantic_completion_elements =
-    Markup.Elements(Markup.COMPLETION, Markup.NO_COMPLETION)
-
-  private val language_context_elements =
-    Markup.Elements(Markup.STRING, Markup.ALT_STRING, Markup.VERBATIM,
-      Markup.CARTOUCHE, Markup.COMMENT, Markup.LANGUAGE,
-      Markup.ML_STRING, Markup.ML_COMMENT)
-
-  private val language_elements = Markup.Elements(Markup.LANGUAGE)
-
-  private val citation_elements = Markup.Elements(Markup.CITATION)
-
-  private val breakpoint_elements = Markup.Elements(Markup.ML_BREAKPOINT)
-
-  private val caret_focus_elements = Markup.Elements(Markup.ENTITY)
-
-  private val highlight_elements =
-    Markup.Elements(Markup.EXPRESSION, Markup.CITATION, Markup.LANGUAGE, Markup.ML_TYPING,
-      Markup.TOKEN_RANGE, Markup.ENTITY, Markup.PATH, Markup.DOC, Markup.URL, Markup.SORTING,
-      Markup.TYPING, Markup.CLASS_PARAMETER, Markup.FREE, Markup.SKOLEM, Markup.BOUND,
-      Markup.VAR, Markup.TFREE, Markup.TVAR, Markup.ML_BREAKPOINT,
-      Markup.MARKDOWN_PARAGRAPH, Markup.Markdown_List.name)
-
-  private val hyperlink_elements =
-    Markup.Elements(Markup.ENTITY, Markup.PATH, Markup.DOC, Markup.POSITION,
-      Markup.CITATION, Markup.URL)
-
-  private val active_elements =
-    Markup.Elements(Markup.DIALOG, Markup.BROWSER, Markup.GRAPHVIEW,
-      Markup.SENDBACK, Markup.JEDIT_ACTION, Markup.SIMP_TRACE_PANEL)
-
-  private val tooltip_message_elements =
-    Markup.Elements(Markup.WRITELN, Markup.INFORMATION, Markup.WARNING, Markup.LEGACY, Markup.ERROR,
-      Markup.BAD)
-
-  private val tooltip_descriptions =
-    Map(
-      Markup.CITATION -> "citation",
-      Markup.TOKEN_RANGE -> "inner syntax token",
-      Markup.FREE -> "free variable",
-      Markup.SKOLEM -> "skolem variable",
-      Markup.BOUND -> "bound variable",
-      Markup.VAR -> "schematic variable",
-      Markup.TFREE -> "free type variable",
-      Markup.TVAR -> "schematic type variable")
-
-  private val tooltip_elements =
-    Markup.Elements(Markup.LANGUAGE, Markup.EXPRESSION, Markup.TIMING, Markup.ENTITY,
-      Markup.SORTING, Markup.TYPING, Markup.CLASS_PARAMETER, Markup.ML_TYPING,
-      Markup.ML_BREAKPOINT, Markup.PATH, Markup.DOC, Markup.URL, Markup.MARKDOWN_PARAGRAPH,
-      Markup.Markdown_List.name) ++ Markup.Elements(tooltip_descriptions.keySet)
-
-  private val gutter_elements =
-    Markup.Elements(Markup.WRITELN, Markup.INFORMATION, Markup.WARNING, Markup.LEGACY, Markup.ERROR)
-
-  private val squiggly_elements =
-    Markup.Elements(Markup.WRITELN, Markup.INFORMATION, Markup.WARNING, Markup.LEGACY, Markup.ERROR)
-
-  private val line_background_elements =
-    Markup.Elements(Markup.WRITELN_MESSAGE, Markup.STATE_MESSAGE, Markup.INFORMATION_MESSAGE,
-      Markup.TRACING_MESSAGE, Markup.WARNING_MESSAGE, Markup.LEGACY_MESSAGE,
-      Markup.ERROR_MESSAGE)
-
-  private val separator_elements =
-    Markup.Elements(Markup.SEPARATOR)
-
-  private val background_elements =
-    Protocol.proper_status_elements + Markup.WRITELN_MESSAGE +
-      Markup.STATE_MESSAGE + Markup.INFORMATION_MESSAGE +
-      Markup.TRACING_MESSAGE + Markup.WARNING_MESSAGE +
-      Markup.LEGACY_MESSAGE + Markup.ERROR_MESSAGE +
-      Markup.BAD + Markup.INTENSIFY + Markup.ENTITY +
-      Markup.Markdown_Item.name ++ active_elements
-
-  private val foreground_elements =
-    Markup.Elements(Markup.STRING, Markup.ALT_STRING, Markup.VERBATIM,
-      Markup.CARTOUCHE, Markup.ANTIQUOTED)
-
-  private val bullet_elements =
-    Markup.Elements(Markup.BULLET, Markup.ML_BREAKPOINT)
-
-  private val fold_depth_elements =
-    Markup.Elements(Markup.TEXT_FOLD, Markup.GOAL, Markup.SUBGOAL)
-}
-
-
-class Rendering private(val snapshot: Document.Snapshot, val options: Options)
-{
-  override def toString: String = "Rendering(" + snapshot.toString + ")"
-
-
-  /* colors */
-
-  def color_value(s: String): Color = Color_Value(options.string(s))
-
-  val outdated_color = color_value("outdated_color")
-  val unprocessed_color = color_value("unprocessed_color")
-  val unprocessed1_color = color_value("unprocessed1_color")
-  val running_color = color_value("running_color")
-  val running1_color = color_value("running1_color")
-  val bullet_color = color_value("bullet_color")
-  val tooltip_color = color_value("tooltip_color")
-  val writeln_color = color_value("writeln_color")
-  val information_color = color_value("information_color")
-  val warning_color = color_value("warning_color")
-  val legacy_color = color_value("legacy_color")
-  val error_color = color_value("error_color")
-  val writeln_message_color = color_value("writeln_message_color")
-  val information_message_color = color_value("information_message_color")
-  val tracing_message_color = color_value("tracing_message_color")
-  val warning_message_color = color_value("warning_message_color")
-  val legacy_message_color = color_value("legacy_message_color")
-  val error_message_color = color_value("error_message_color")
-  val spell_checker_color = color_value("spell_checker_color")
-  val bad_color = color_value("bad_color")
-  val intensify_color = color_value("intensify_color")
-  val entity_color = color_value("entity_color")
-  val entity_ref_color = color_value("entity_ref_color")
-  val breakpoint_disabled_color = color_value("breakpoint_disabled_color")
-  val breakpoint_enabled_color = color_value("breakpoint_enabled_color")
-  val caret_debugger_color = color_value("caret_debugger_color")
-  val quoted_color = color_value("quoted_color")
-  val antiquoted_color = color_value("antiquoted_color")
-  val antiquote_color = color_value("antiquote_color")
-  val highlight_color = color_value("highlight_color")
-  val hyperlink_color = color_value("hyperlink_color")
-  val active_color = color_value("active_color")
-  val active_hover_color = color_value("active_hover_color")
-  val active_result_color = color_value("active_result_color")
-  val keyword1_color = color_value("keyword1_color")
-  val keyword2_color = color_value("keyword2_color")
-  val keyword3_color = color_value("keyword3_color")
-  val quasi_keyword_color = color_value("quasi_keyword_color")
-  val improper_color = color_value("improper_color")
-  val operator_color = color_value("operator_color")
-  val caret_invisible_color = color_value("caret_invisible_color")
-  val completion_color = color_value("completion_color")
-  val search_color = color_value("search_color")
-
-  val tfree_color = color_value("tfree_color")
-  val tvar_color = color_value("tvar_color")
-  val free_color = color_value("free_color")
-  val skolem_color = color_value("skolem_color")
-  val bound_color = color_value("bound_color")
-  val var_color = color_value("var_color")
-  val inner_numeral_color = color_value("inner_numeral_color")
-  val inner_quoted_color = color_value("inner_quoted_color")
-  val inner_cartouche_color = color_value("inner_cartouche_color")
-  val inner_comment_color = color_value("inner_comment_color")
-  val dynamic_color = color_value("dynamic_color")
-  val class_parameter_color = color_value("class_parameter_color")
-
-  val markdown_item_color1 = color_value("markdown_item_color1")
-  val markdown_item_color2 = color_value("markdown_item_color2")
-  val markdown_item_color3 = color_value("markdown_item_color3")
-  val markdown_item_color4 = color_value("markdown_item_color4")
-
-
-  /* indentation */
-
-  def indentation(range: Text.Range): Int =
-    snapshot.select(range, Rendering.indentation_elements, _ =>
-      {
-        case Text.Info(_, XML.Elem(Markup.Command_Indent(i), _)) => Some(i)
-        case _ => None
-      }).headOption.map(_.info).getOrElse(0)
-
-
-  /* completion */
-
-  def semantic_completion(completed_range: Option[Text.Range], range: Text.Range)
-      : Option[Text.Info[Completion.Semantic]] =
-    if (snapshot.is_outdated) None
-    else {
-      snapshot.select(range, Rendering.semantic_completion_elements, _ =>
-        {
-          case Completion.Semantic.Info(info) =>
-            completed_range match {
-              case Some(range0) if range0.contains(info.range) && range0 != info.range => None
-              case _ => Some(info)
-            }
-          case _ => None
-        }).headOption.map(_.info)
-    }
-
-  def language_context(range: Text.Range): Option[Completion.Language_Context] =
-    snapshot.select(range, Rendering.language_context_elements, _ =>
-      {
-        case Text.Info(_, XML.Elem(Markup.Language(language, symbols, antiquotes, delimited), _)) =>
-          if (delimited) Some(Completion.Language_Context(language, symbols, antiquotes))
-          else None
-        case Text.Info(_, elem)
-        if elem.name == Markup.ML_STRING || elem.name == Markup.ML_COMMENT =>
-          Some(Completion.Language_Context.ML_inner)
-        case Text.Info(_, _) =>
-          Some(Completion.Language_Context.inner)
-      }).headOption.map(_.info)
-
-  def language_path(range: Text.Range): Option[Text.Range] =
-    snapshot.select(range, Rendering.language_elements, _ =>
-      {
-        case Text.Info(info_range, XML.Elem(Markup.Language(Markup.Language.PATH, _, _, _), _)) =>
-          Some(snapshot.convert(info_range))
-        case _ => None
-      }).headOption.map(_.info)
-
-  def citation(range: Text.Range): Option[Text.Info[String]] =
-    snapshot.select(range, Rendering.citation_elements, _ =>
-      {
-        case Text.Info(info_range, XML.Elem(Markup.Citation(name), _)) =>
-          Some(Text.Info(snapshot.convert(info_range), name))
-        case _ => None
-      }).headOption.map(_.info)
-
-
-  /* spell checker */
-
-  private lazy val spell_checker_elements =
-    Markup.Elements(space_explode(',', options.string("spell_checker_elements")): _*)
-
-  def spell_checker_ranges(range: Text.Range): List[Text.Range] =
-    snapshot.select(range, spell_checker_elements, _ => _ => Some(())).map(_.range)
-
-  def spell_checker_point(range: Text.Range): Option[Text.Range] =
-    snapshot.select(range, spell_checker_elements, _ =>
-      {
-        case info => Some(snapshot.convert(info.range))
-      }).headOption.map(_.info)
-
-
-  /* breakpoints */
-
-  def breakpoint(range: Text.Range): Option[(Command, Long)] =
-    if (snapshot.is_outdated) None
-    else
-      snapshot.select(range, Rendering.breakpoint_elements, command_states =>
-        {
-          case Text.Info(_, Protocol.ML_Breakpoint(breakpoint)) =>
-            command_states match {
-              case st :: _ => Some((st.command, breakpoint))
-              case _ => None
-            }
-          case _ => None
-        }).headOption.map(_.info)
-
-
-  /* command status overview */
-
-  def overview_color(range: Text.Range): Option[Color] =
-  {
-    if (snapshot.is_outdated) None
-    else {
-      val results =
-        snapshot.cumulate[List[Markup]](range, Nil, Protocol.liberal_status_elements, _ =>
-          {
-            case (status, Text.Info(_, elem)) => Some(elem.markup :: status)
-          }, status = true)
-      if (results.isEmpty) None
-      else {
-        val status = Protocol.Status.make(results.iterator.flatMap(_.info))
-
-        if (status.is_running) Some(running_color)
-        else if (status.is_failed) Some(error_color)
-        else if (status.is_warned) Some(warning_color)
-        else if (status.is_unprocessed) Some(unprocessed_color)
-        else None
-      }
-    }
-  }
-
-
-  /* caret focus */
-
-  def entity_focus(range: Text.Range,
-    check: (Boolean, Long) => Boolean = (is_def: Boolean, i: Long) => is_def): Set[Long] =
-  {
-    val results =
-      snapshot.cumulate[Set[Long]](range, Set.empty, Rendering.caret_focus_elements, _ =>
-          {
-            case (serials, Text.Info(_, XML.Elem(Markup(Markup.ENTITY, props), _))) =>
-              props match {
-                case Markup.Entity.Def(i) if check(true, i) => Some(serials + i)
-                case Markup.Entity.Ref(i) if check(false, i) => Some(serials + i)
-                case _ => None
-              }
-            case _ => None
-          })
-    (Set.empty[Long] /: results){ case (s1, Text.Info(_, s2)) => s1 ++ s2 }
-  }
-
-  def caret_focus(caret_range: Text.Range, visible_range: Text.Range): Set[Long] =
-  {
-    val focus_defs = entity_focus(caret_range)
-    if (focus_defs.nonEmpty) focus_defs
-    else {
-      val visible_defs = entity_focus(visible_range)
-      entity_focus(caret_range, (is_def: Boolean, i: Long) => !is_def && visible_defs.contains(i))
-    }
-  }
-
-  def caret_focus_ranges(caret_range: Text.Range, visible_range: Text.Range): List[Text.Range] =
-  {
-    val focus = caret_focus(caret_range, visible_range)
-    if (focus.nonEmpty) {
-      val results =
-        snapshot.cumulate[Boolean](visible_range, false, Rendering.caret_focus_elements, _ =>
-          {
-            case (_, Text.Info(_, XML.Elem(Markup(Markup.ENTITY, props), _))) =>
-              props match {
-                case Markup.Entity.Def(i) if focus(i) => Some(true)
-                case Markup.Entity.Ref(i) if focus(i) => Some(true)
-                case _ => None
-              }
-          })
-      for (info <- results if info.info) yield info.range
-    }
-    else Nil
-  }
-
-  def entity_ref(range: Text.Range, focus: Set[Long]): List[Text.Info[Color]] =
-    snapshot.select(range, Rendering.caret_focus_elements, _ =>
-      {
-        case Text.Info(_, XML.Elem(Markup(Markup.ENTITY, Markup.Entity.Ref(i)), _)) if focus(i) =>
-          Some(entity_ref_color)
-        case _ => None
-      })
-
-
-  /* highlighted area */
-
-  def highlight(range: Text.Range): Option[Text.Info[Color]] =
-    snapshot.select(range, Rendering.highlight_elements, _ =>
-      {
-        case info => Some(Text.Info(snapshot.convert(info.range), highlight_color))
-      }).headOption.map(_.info)
-
-
-  /* hyperlinks */
-
-  private def jedit_file(name: String): String =
-    if (Path.is_valid(name))
-      PIDE.resources.append(snapshot.node_name.master_dir, Path.explode(name))
-    else name
-
-  def hyperlink(range: Text.Range): Option[Text.Info[PIDE.editor.Hyperlink]] =
-  {
-    snapshot.cumulate[Vector[Text.Info[PIDE.editor.Hyperlink]]](
-      range, Vector.empty, Rendering.hyperlink_elements, _ =>
-        {
-          case (links, Text.Info(info_range, XML.Elem(Markup.Path(name), _))) =>
-            val link = PIDE.editor.hyperlink_file(true, jedit_file(name))
-            Some(links :+ Text.Info(snapshot.convert(info_range), link))
-
-          case (links, Text.Info(info_range, XML.Elem(Markup.Doc(name), _))) =>
-            PIDE.editor.hyperlink_doc(name).map(link =>
-              (links :+ Text.Info(snapshot.convert(info_range), link)))
-
-          case (links, Text.Info(info_range, XML.Elem(Markup.Url(name), _))) =>
-            val link = PIDE.editor.hyperlink_url(name)
-            Some(links :+ Text.Info(snapshot.convert(info_range), link))
-
-          case (links, Text.Info(info_range, XML.Elem(Markup(Markup.ENTITY, props), _)))
-          if !props.exists(
-            { case (Markup.KIND, Markup.ML_OPEN) => true
-              case (Markup.KIND, Markup.ML_STRUCTURE) => true
-              case _ => false }) =>
-            val opt_link = PIDE.editor.hyperlink_def_position(true, snapshot, props)
-            opt_link.map(link => links :+ Text.Info(snapshot.convert(info_range), link))
-
-          case (links, Text.Info(info_range, XML.Elem(Markup(Markup.POSITION, props), _))) =>
-            val opt_link = PIDE.editor.hyperlink_position(true, snapshot, props)
-            opt_link.map(link => links :+ Text.Info(snapshot.convert(info_range), link))
-
-          case (links, Text.Info(info_range, XML.Elem(Markup.Citation(name), _))) =>
-            val opt_link =
-              Bibtex_JEdit.entries_iterator.collectFirst(
-                { case (a, buffer, offset) if a == name =>
-                    PIDE.editor.hyperlink_buffer(true, buffer, offset) })
-            opt_link.map(link => links :+ Text.Info(snapshot.convert(info_range), link))
-
-          case _ => None
-        }) match { case Text.Info(_, _ :+ info) :: _ => Some(info) case _ => None }
-  }
-
-
-  /* active elements */
-
-  def active(range: Text.Range): Option[Text.Info[XML.Elem]] =
-    snapshot.select(range, Rendering.active_elements, command_states =>
-      {
-        case Text.Info(info_range, elem) =>
-          if (elem.name == Markup.DIALOG) {
-            elem match {
-              case Protocol.Dialog(_, serial, _)
-              if !command_states.exists(st => st.results.defined(serial)) =>
-                Some(Text.Info(snapshot.convert(info_range), elem))
-              case _ => None
-            }
-          }
-          else Some(Text.Info(snapshot.convert(info_range), elem))
-      }).headOption.map(_.info)
-
-  def command_results(range: Text.Range): Command.Results =
-    Command.State.merge_results(
-      snapshot.select[List[Command.State]](range, Markup.Elements.full, command_states =>
-        { case _ => Some(command_states) }).flatMap(_.info))
-
-
-  /* tooltip messages */
-
-  def tooltip_message(range: Text.Range): Option[Text.Info[XML.Body]] =
-  {
-    val results =
-      snapshot.cumulate[List[Text.Info[Command.Results.Entry]]](
-        range, Nil, Rendering.tooltip_message_elements, _ =>
-        {
-          case (msgs, Text.Info(info_range, msg @ XML.Elem(Markup(Markup.BAD, _), body)))
-          if body.nonEmpty =>
-            val entry: Command.Results.Entry = (Document_ID.make(), msg)
-            Some(Text.Info(snapshot.convert(info_range), entry) :: msgs)
-
-          case (msgs, Text.Info(info_range,
-            XML.Elem(Markup(name, props @ Markup.Serial(serial)), body))) =>
-            val entry: Command.Results.Entry =
-              serial -> XML.Elem(Markup(Markup.message(name), props), body)
-            Some(Text.Info(snapshot.convert(info_range), entry) :: msgs)
-
-          case _ => None
-        }).flatMap(_.info)
-    if (results.isEmpty) None
-    else {
-      val r = Text.Range(results.head.range.start, results.last.range.stop)
-      val msgs = Command.Results.make(results.map(_.info))
-      Some(Text.Info(r, Pretty.separate(msgs.iterator.map(_._2).toList)))
-    }
-  }
-
-
-  /* tooltips */
-
-  private def pretty_typing(kind: String, body: XML.Body): XML.Tree =
-    Pretty.block(XML.Text(kind) :: Pretty.brk(1) :: body)
-
-  private def timing_threshold: Double = options.real("jedit_timing_threshold")
-
-  def tooltip(range: Text.Range): Option[Text.Info[XML.Body]] =
-  {
-    def add(prev: Text.Info[(Timing, Vector[(Boolean, XML.Tree)])],
-      r0: Text.Range, p: (Boolean, XML.Tree)): Text.Info[(Timing, Vector[(Boolean, XML.Tree)])] =
-    {
-      val r = snapshot.convert(r0)
-      val (t, info) = prev.info
-      if (prev.range == r)
-        Text.Info(r, (t, info :+ p))
-      else Text.Info(r, (t, Vector(p)))
-    }
-
-    val results =
-      snapshot.cumulate[Text.Info[(Timing, Vector[(Boolean, XML.Tree)])]](
-        range, Text.Info(range, (Timing.zero, Vector.empty)), Rendering.tooltip_elements, _ =>
-        {
-          case (Text.Info(r, (t1, info)), Text.Info(_, XML.Elem(Markup.Timing(t2), _))) =>
-            Some(Text.Info(r, (t1 + t2, info)))
-
-          case (prev, Text.Info(r, XML.Elem(Markup.Entity(kind, name), _)))
-          if kind != "" &&
-            kind != Markup.ML_DEF &&
-            kind != Markup.ML_OPEN &&
-            kind != Markup.ML_STRUCTURE =>
-            val kind1 = Word.implode(Word.explode('_', kind))
-            val txt1 =
-              if (name == "") kind1
-              else if (kind1 == "") quote(name)
-              else kind1 + " " + quote(name)
-            val t = prev.info._1
-            val txt2 =
-              if (kind == Markup.COMMAND && t.elapsed.seconds >= timing_threshold)
-                "\n" + t.message
-              else ""
-            Some(add(prev, r, (true, XML.Text(txt1 + txt2))))
-
-          case (prev, Text.Info(r, XML.Elem(Markup.Path(name), _))) =>
-            val file = jedit_file(name)
-            val text =
-              if (name == file) "file " + quote(file)
-              else "path " + quote(name) + "\nfile " + quote(file)
-            Some(add(prev, r, (true, XML.Text(text))))
-
-          case (prev, Text.Info(r, XML.Elem(Markup.Doc(name), _))) =>
-            val text = "doc " + quote(name)
-            Some(add(prev, r, (true, XML.Text(text))))
-
-          case (prev, Text.Info(r, XML.Elem(Markup.Url(name), _))) =>
-            Some(add(prev, r, (true, XML.Text("URL " + quote(name)))))
-
-          case (prev, Text.Info(r, XML.Elem(Markup(name, _), body)))
-          if name == Markup.SORTING || name == Markup.TYPING =>
-            Some(add(prev, r, (true, pretty_typing("::", body))))
-
-          case (prev, Text.Info(r, XML.Elem(Markup(Markup.CLASS_PARAMETER, _), body))) =>
-            Some(add(prev, r, (true, Pretty.block(0, body))))
-
-          case (prev, Text.Info(r, XML.Elem(Markup(Markup.ML_TYPING, _), body))) =>
-            Some(add(prev, r, (false, pretty_typing("ML:", body))))
-
-          case (prev, Text.Info(r, Protocol.ML_Breakpoint(breakpoint))) =>
-            val text =
-              if (Debugger.breakpoint_state(breakpoint)) "breakpoint (enabled)"
-              else "breakpoint (disabled)"
-            Some(add(prev, r, (true, XML.Text(text))))
-
-          case (prev, Text.Info(r, XML.Elem(Markup.Language(language, _, _, _), _))) =>
-            val lang = Word.implode(Word.explode('_', language))
-            Some(add(prev, r, (true, XML.Text("language: " + lang))))
-
-          case (prev, Text.Info(r, XML.Elem(Markup.Expression(kind), _))) =>
-            val descr = if (kind == "") "expression" else "expression: " + kind
-            Some(add(prev, r, (true, XML.Text(descr))))
-
-          case (prev, Text.Info(r, XML.Elem(Markup(Markup.MARKDOWN_PARAGRAPH, _), _))) =>
-            Some(add(prev, r, (true, XML.Text("Markdown: paragraph"))))
-          case (prev, Text.Info(r, XML.Elem(Markup.Markdown_List(kind), _))) =>
-            Some(add(prev, r, (true, XML.Text("Markdown: " + kind))))
-
-          case (prev, Text.Info(r, XML.Elem(Markup(name, _), _))) =>
-            Rendering.tooltip_descriptions.get(name).
-              map(descr => add(prev, r, (true, XML.Text(descr))))
-        }).map(_.info)
-
-    results.map(_.info).flatMap(res => res._2.toList) match {
-      case Nil => None
-      case tips =>
-        val r = Text.Range(results.head.range.start, results.last.range.stop)
-        val all_tips = (tips.filter(_._1) ++ tips.filter(!_._1).lastOption.toList).map(_._2)
-        Some(Text.Info(r, Library.separate(Pretty.fbrk, all_tips)))
-    }
-  }
-
-  def tooltip_margin: Int = options.int("jedit_tooltip_margin")
-
-  lazy val tooltip_close_icon = JEdit_Lib.load_icon(options.string("tooltip_close_icon"))
-  lazy val tooltip_detach_icon = JEdit_Lib.load_icon(options.string("tooltip_detach_icon"))
-
-
-  /* gutter */
-
-  private def gutter_message_pri(msg: XML.Tree): Int =
-    if (Protocol.is_error(msg)) Rendering.error_pri
-    else if (Protocol.is_legacy(msg)) Rendering.legacy_pri
-    else if (Protocol.is_warning(msg)) Rendering.warning_pri
-    else if (Protocol.is_information(msg)) Rendering.information_pri
-    else 0
-
-  private lazy val gutter_message_content = Map(
-    Rendering.information_pri ->
-      (JEdit_Lib.load_icon(options.string("gutter_information_icon")), information_message_color),
-    Rendering.warning_pri ->
-      (JEdit_Lib.load_icon(options.string("gutter_warning_icon")), warning_message_color),
-    Rendering.legacy_pri ->
-      (JEdit_Lib.load_icon(options.string("gutter_legacy_icon")), warning_message_color),
-    Rendering.error_pri ->
-      (JEdit_Lib.load_icon(options.string("gutter_error_icon")), error_message_color))
-
-  def gutter_content(range: Text.Range): Option[(Icon, Color)] =
-  {
-    val pris =
-      snapshot.cumulate[Int](range, 0, Rendering.gutter_elements, _ =>
-        {
-          case (pri, Text.Info(_, msg @ XML.Elem(Markup(_, Markup.Serial(serial)), _))) =>
-            Some(pri max gutter_message_pri(msg))
-          case _ => None
-        }).map(_.info)
-
-    gutter_message_content.get((0 /: pris)(_ max _))
-  }
-
-
-  /* squiggly underline */
-
-  private lazy val squiggly_colors = Map(
-    Rendering.writeln_pri -> writeln_color,
-    Rendering.information_pri -> information_color,
-    Rendering.warning_pri -> warning_color,
-    Rendering.legacy_pri -> legacy_color,
-    Rendering.error_pri -> error_color)
-
-  def squiggly_underline(range: Text.Range): List[Text.Info[Color]] =
-  {
-    val results =
-      snapshot.cumulate[Int](range, 0, Rendering.squiggly_elements, _ =>
-        {
-          case (pri, Text.Info(_, elem)) => Some(pri max Rendering.message_pri(elem.name))
-        })
-    for {
-      Text.Info(r, pri) <- results
-      color <- squiggly_colors.get(pri)
-    } yield Text.Info(r, color)
-  }
-
-
-  /* message output */
-
-  private lazy val message_colors = Map(
-    Rendering.writeln_pri -> writeln_message_color,
-    Rendering.information_pri -> information_message_color,
-    Rendering.tracing_pri -> tracing_message_color,
-    Rendering.warning_pri -> warning_message_color,
-    Rendering.legacy_pri -> legacy_message_color,
-    Rendering.error_pri -> error_message_color)
-
-  def line_background(range: Text.Range): Option[(Color, Boolean)] =
-  {
-    val results =
-      snapshot.cumulate[Int](range, 0, Rendering.line_background_elements, _ =>
-        {
-          case (pri, Text.Info(_, elem)) => Some(pri max Rendering.message_pri(elem.name))
-        })
-    val pri = (0 /: results) { case (p1, Text.Info(_, p2)) => p1 max p2 }
-
-    message_colors.get(pri).map(message_color =>
-      {
-        val is_separator =
-          snapshot.cumulate[Boolean](range, false, Rendering.separator_elements, _ =>
-            {
-              case _ => Some(true)
-            }).exists(_.info)
-        (message_color, is_separator)
-      })
-  }
-
-  def output_messages(results: Command.Results): List[XML.Tree] =
-  {
-    val (states, other) =
-      results.iterator.map(_._2).filterNot(Protocol.is_result(_)).toList
-        .partition(Protocol.is_state(_))
-    states ::: other
-  }
-
-
-  /* text background */
-
-  def background(range: Text.Range, focus: Set[Long]): List[Text.Info[Color]] =
-  {
-    for {
-      Text.Info(r, result) <-
-        snapshot.cumulate[(List[Markup], Option[Color])](
-          range, (List(Markup.Empty), None), Rendering.background_elements,
-          command_states =>
-            {
-              case (((status, color), Text.Info(_, XML.Elem(markup, _))))
-              if status.nonEmpty && Protocol.proper_status_elements(markup.name) =>
-                Some((markup :: status, color))
-              case (_, Text.Info(_, XML.Elem(Markup(Markup.BAD, _), _))) =>
-                Some((Nil, Some(bad_color)))
-              case (_, Text.Info(_, XML.Elem(Markup(Markup.INTENSIFY, _), _))) =>
-                Some((Nil, Some(intensify_color)))
-              case (_, Text.Info(_, XML.Elem(Markup(Markup.ENTITY, props), _))) =>
-                props match {
-                  case Markup.Entity.Def(i) if focus(i) => Some((Nil, Some(entity_color)))
-                  case Markup.Entity.Ref(i) if focus(i) => Some((Nil, Some(entity_color)))
-                  case _ => None
-                }
-              case (_, Text.Info(_, XML.Elem(Markup.Markdown_Item(depth), _))) =>
-                val color =
-                  depth match {
-                    case 1 => markdown_item_color1
-                    case 2 => markdown_item_color2
-                    case 3 => markdown_item_color3
-                    case _ => markdown_item_color4
-                  }
-                Some((Nil, Some(color)))
-              case (acc, Text.Info(_, Protocol.Dialog(_, serial, result))) =>
-                command_states.collectFirst(
-                  { case st if st.results.defined(serial) => st.results.get(serial).get }) match
-                {
-                  case Some(Protocol.Dialog_Result(res)) if res == result =>
-                    Some((Nil, Some(active_result_color)))
-                  case _ =>
-                    Some((Nil, Some(active_color)))
-                }
-              case (_, Text.Info(_, elem)) =>
-                if (Rendering.active_elements(elem.name)) Some((Nil, Some(active_color)))
-                else None
-            })
-      color <-
-        (result match {
-          case (markups, opt_color) if markups.nonEmpty =>
-            val status = Protocol.Status.make(markups.iterator)
-            if (status.is_unprocessed) Some(unprocessed1_color)
-            else if (status.is_running) Some(running1_color)
-            else opt_color
-          case (_, opt_color) => opt_color
-        })
-    } yield Text.Info(r, color)
-  }
-
-
-  /* text foreground */
-
-  def foreground(range: Text.Range): List[Text.Info[Color]] =
-    snapshot.select(range, Rendering.foreground_elements, _ =>
-      {
-        case Text.Info(_, elem) =>
-          if (elem.name == Markup.ANTIQUOTED) Some(antiquoted_color) else Some(quoted_color)
-      })
-
-
-  /* text color */
-
-  val foreground_color = jEdit.getColorProperty("view.fgColor")
-
-  private lazy val text_colors: Map[String, Color] = Map(
-      Markup.KEYWORD1 -> keyword1_color,
-      Markup.KEYWORD2 -> keyword2_color,
-      Markup.KEYWORD3 -> keyword3_color,
-      Markup.QUASI_KEYWORD -> quasi_keyword_color,
-      Markup.IMPROPER -> improper_color,
-      Markup.OPERATOR -> operator_color,
-      Markup.STRING -> foreground_color,
-      Markup.ALT_STRING -> foreground_color,
-      Markup.VERBATIM -> foreground_color,
-      Markup.CARTOUCHE -> foreground_color,
-      Markup.LITERAL -> keyword1_color,
-      Markup.DELIMITER -> foreground_color,
-      Markup.TFREE -> tfree_color,
-      Markup.TVAR -> tvar_color,
-      Markup.FREE -> free_color,
-      Markup.SKOLEM -> skolem_color,
-      Markup.BOUND -> bound_color,
-      Markup.VAR -> var_color,
-      Markup.INNER_STRING -> inner_quoted_color,
-      Markup.INNER_CARTOUCHE -> inner_cartouche_color,
-      Markup.INNER_COMMENT -> inner_comment_color,
-      Markup.DYNAMIC_FACT -> dynamic_color,
-      Markup.CLASS_PARAMETER -> class_parameter_color,
-      Markup.ANTIQUOTE -> antiquote_color,
-      Markup.ML_KEYWORD1 -> keyword1_color,
-      Markup.ML_KEYWORD2 -> keyword2_color,
-      Markup.ML_KEYWORD3 -> keyword3_color,
-      Markup.ML_DELIMITER -> foreground_color,
-      Markup.ML_NUMERAL -> inner_numeral_color,
-      Markup.ML_CHAR -> inner_quoted_color,
-      Markup.ML_STRING -> inner_quoted_color,
-      Markup.ML_COMMENT -> inner_comment_color,
-      Markup.SML_STRING -> inner_quoted_color,
-      Markup.SML_COMMENT -> inner_comment_color)
-
-  private lazy val text_color_elements =
-    Markup.Elements(text_colors.keySet)
-
-  def text_color(range: Text.Range, color: Color): List[Text.Info[Color]] =
-  {
-    if (color == Token_Markup.hidden_color) List(Text.Info(range, color))
-    else
-      snapshot.cumulate(range, color, text_color_elements, _ =>
-        {
-          case (_, Text.Info(_, elem)) => text_colors.get(elem.name)
-        })
-  }
-
-
-  /* virtual bullets */
-
-  def bullet(range: Text.Range): List[Text.Info[Color]] =
-    snapshot.select(range, Rendering.bullet_elements, _ =>
-      {
-        case Text.Info(_, Protocol.ML_Breakpoint(breakpoint)) =>
-          Debugger.active_breakpoint_state(breakpoint).map(b =>
-            if (b) breakpoint_enabled_color else breakpoint_disabled_color)
-        case _ => Some(bullet_color)
-      })
-
-
-  /* text folds */
-
-  def fold_depth(range: Text.Range): List[Text.Info[Int]] =
-    snapshot.cumulate[Int](range, 0, Rendering.fold_depth_elements, _ =>
-      {
-        case (depth, _) => Some(depth + 1)
-      })
-}
diff -r f3f457535fe2 -r c6330e16743f src/Tools/jEdit/src/rich_text_area.scala
--- a/src/Tools/jEdit/src/rich_text_area.scala	Wed Dec 21 11:14:37 2016 +0100
+++ b/src/Tools/jEdit/src/rich_text_area.scala	Wed Dec 21 11:14:55 2016 +0100
@@ -29,7 +29,7 @@
 class Rich_Text_Area(
   view: View,
   text_area: TextArea,
-  get_rendering: () => Rendering,
+  get_rendering: () => JEdit_Rendering,
   close_action: () => Unit,
   get_search_pattern: () => Option[Regex],
   caret_update: () => Unit,
@@ -72,7 +72,7 @@
 
   /* common painter state */
 
-  @volatile private var painter_rendering: Rendering = null
+  @volatile private var painter_rendering: JEdit_Rendering = null
   @volatile private var painter_clip: Shape = null
   @volatile private var caret_focus: Set[Long] = Set.empty
 
@@ -105,7 +105,7 @@
     }
   }
 
-  def robust_rendering(body: Rendering => Unit)
+  def robust_rendering(body: JEdit_Rendering => Unit)
   {
     robust_body(()) { body(painter_rendering) }
   }
@@ -114,7 +114,7 @@
   /* active areas within the text */
 
   private class Active_Area[A](
-    rendering: Rendering => Text.Range => Option[Text.Info[A]],
+    rendering: JEdit_Rendering => Text.Range => Option[Text.Info[A]],
     cursor: Option[Int])
   {
     private var the_text_info: Option[(String, Text.Info[A])] = None
@@ -147,7 +147,7 @@
       }
     }
 
-    def update_rendering(r: Rendering, range: Text.Range)
+    def update_rendering(r: JEdit_Rendering, range: Text.Range)
     { update(rendering(r)(range)) }
 
     def reset { update(None) }
@@ -157,15 +157,15 @@
 
   private val highlight_area =
     new Active_Area[Color](
-      (rendering: Rendering) => rendering.highlight _, None)
+      (rendering: JEdit_Rendering) => rendering.highlight _, None)
 
   private val hyperlink_area =
     new Active_Area[PIDE.editor.Hyperlink](
-      (rendering: Rendering) => rendering.hyperlink _, Some(Cursor.HAND_CURSOR))
+      (rendering: JEdit_Rendering) => rendering.hyperlink _, Some(Cursor.HAND_CURSOR))
 
   private val active_area =
     new Active_Area[XML.Elem](
-      (rendering: Rendering) => rendering.active _, Some(Cursor.DEFAULT_CURSOR))
+      (rendering: JEdit_Rendering) => rendering.active _, Some(Cursor.DEFAULT_CURSOR))
 
   private val active_areas =
     List((highlight_area, true), (hyperlink_area, true), (active_area, false))
@@ -362,7 +362,7 @@
   private def caret_enabled: Boolean =
     caret_visible && (!text_area.hasFocus || text_area.isCaretVisible)
 
-  private def caret_color(rendering: Rendering, offset: Text.Offset): Color =
+  private def caret_color(rendering: JEdit_Rendering, offset: Text.Offset): Color =
   {
     if (text_area.isCaretVisible) text_area.getPainter.getCaretColor
     else {
@@ -377,7 +377,7 @@
     }
   }
 
-  private def paint_chunk_list(rendering: Rendering,
+  private def paint_chunk_list(rendering: JEdit_Rendering,
     gfx: Graphics2D, line_start: Text.Offset, head: Chunk, x: Float, y: Float): Float =
   {
     val clip_rect = gfx.getClipBounds
diff -r f3f457535fe2 -r c6330e16743f src/Tools/jEdit/src/spell_checker.scala
--- a/src/Tools/jEdit/src/spell_checker.scala	Wed Dec 21 11:14:37 2016 +0100
+++ b/src/Tools/jEdit/src/spell_checker.scala	Wed Dec 21 11:14:55 2016 +0100
@@ -61,7 +61,7 @@
     result.toList
   }
 
-  def current_word(text_area: TextArea, rendering: Rendering, range: Text.Range)
+  def current_word(text_area: TextArea, rendering: JEdit_Rendering, range: Text.Range)
     : Option[Text.Info[String]] =
   {
     for {
@@ -75,7 +75,7 @@
 
   /** completion **/
 
-  def completion(text_area: TextArea, explicit: Boolean, rendering: Rendering)
+  def completion(text_area: TextArea, explicit: Boolean, rendering: JEdit_Rendering)
       : Option[Completion.Result] =
   {
     for {
diff -r f3f457535fe2 -r c6330e16743f src/Tools/jEdit/src/text_structure.scala
--- a/src/Tools/jEdit/src/text_structure.scala	Wed Dec 21 11:14:37 2016 +0100
+++ b/src/Tools/jEdit/src/text_structure.scala	Wed Dec 21 11:14:55 2016 +0100
@@ -86,7 +86,7 @@
 
           val script_indent: Text.Info[Token] => Int =
           {
-            val opt_rendering: Option[Rendering] =
+            val opt_rendering: Option[JEdit_Rendering] =
               if (PIDE.options.value.bool("jedit_indent_script"))
                 GUI_Thread.now {
                   (for {
diff -r f3f457535fe2 -r c6330e16743f src/Tools/jEdit/src/token_markup.scala
--- a/src/Tools/jEdit/src/token_markup.scala	Wed Dec 21 11:14:37 2016 +0100
+++ b/src/Tools/jEdit/src/token_markup.scala	Wed Dec 21 11:14:55 2016 +0100
@@ -401,14 +401,15 @@
           (line_context.context, opt_syntax) match {
             case (Some(ctxt), _) if mode == "isabelle-ml" || mode == "sml" =>
               val (tokens, ctxt1) = ML_Lex.tokenize_line(mode == "sml", line, ctxt)
-              val styled_tokens = tokens.map(tok => (Rendering.ml_token_markup(tok), tok.source))
+              val styled_tokens =
+                tokens.map(tok => (JEdit_Rendering.ml_token_markup(tok), tok.source))
               (styled_tokens, new Line_Context(line_context.mode, Some(ctxt1), structure))
 
             case (Some(ctxt), Some(syntax)) if syntax.has_tokens =>
               val (tokens, ctxt1) = Token.explode_line(syntax.keywords, line, ctxt)
               val structure1 = structure.update(syntax.keywords, tokens)
               val styled_tokens =
-                tokens.map(tok => (Rendering.token_markup(syntax, tok), tok.source))
+                tokens.map(tok => (JEdit_Rendering.token_markup(syntax, tok), tok.source))
               (styled_tokens, new Line_Context(line_context.mode, Some(ctxt1), structure1))
 
             case _ =>