src/Tools/jEdit/src/rendering.scala
author wenzelm
Thu Feb 20 17:57:26 2014 +0100 (2014-02-20 ago)
changeset 55625 d8eb606cf321
parent 55623 7aea773c5574
child 55626 0e2b7f04c944
permissions -rw-r--r--
complete symbols within ML strings / comments;
     1 /*  Title:      Tools/jEdit/src/rendering.scala
     2     Author:     Makarius
     3 
     4 Isabelle-specific implementation of quasi-abstract rendering and
     5 markup interpretation.
     6 */
     7 
     8 package isabelle.jedit
     9 
    10 
    11 import isabelle._
    12 
    13 import java.awt.Color
    14 import javax.swing.Icon
    15 
    16 import org.gjt.sp.jedit.syntax.{Token => JEditToken}
    17 import org.gjt.sp.jedit.{jEdit, View}
    18 
    19 import scala.collection.immutable.SortedMap
    20 
    21 
    22 object Rendering
    23 {
    24   def apply(snapshot: Document.Snapshot, options: Options): Rendering =
    25     new Rendering(snapshot, options)
    26 
    27 
    28   /* message priorities */
    29 
    30   private val writeln_pri = 1
    31   private val information_pri = 2
    32   private val tracing_pri = 3
    33   private val warning_pri = 4
    34   private val legacy_pri = 5
    35   private val error_pri = 6
    36 
    37   private val message_pri = Map(
    38     Markup.WRITELN -> writeln_pri, Markup.WRITELN_MESSAGE -> writeln_pri,
    39     Markup.TRACING -> tracing_pri, Markup.TRACING_MESSAGE -> tracing_pri,
    40     Markup.WARNING -> warning_pri, Markup.WARNING_MESSAGE -> warning_pri,
    41     Markup.ERROR -> error_pri, Markup.ERROR_MESSAGE -> error_pri)
    42 
    43 
    44   /* jEdit font */
    45 
    46   def font_family(): String = jEdit.getProperty("view.font")
    47 
    48   private def view_font_size(): Int = jEdit.getIntegerProperty("view.fontsize", 16)
    49   private val font_size0 = 5
    50   private val font_size1 = 250
    51 
    52   def font_size(scale: String): Float =
    53     (view_font_size() * PIDE.options.real(scale)).toFloat max font_size0 min font_size1
    54 
    55   def font_size_change(view: View, change: Int => Int)
    56   {
    57     val size = change(view_font_size()) max font_size0 min font_size1
    58     jEdit.setIntegerProperty("view.fontsize", size)
    59     jEdit.propertiesChanged()
    60     jEdit.saveSettings()
    61     view.getStatus.setMessageAndClear("Text font size: " + size)
    62   }
    63 
    64 
    65   /* popup window bounds */
    66 
    67   def popup_bounds: Double = (PIDE.options.real("jedit_popup_bounds") max 0.2) min 0.8
    68 
    69 
    70   /* Isabelle/Isar token markup */
    71 
    72   private val command_style: Map[String, Byte] =
    73   {
    74     import JEditToken._
    75     Map[String, Byte](
    76       Keyword.THY_END -> KEYWORD2,
    77       Keyword.THY_SCRIPT -> LABEL,
    78       Keyword.QED_SCRIPT -> DIGIT,
    79       Keyword.PRF_SCRIPT -> DIGIT,
    80       Keyword.PRF_ASM -> KEYWORD3,
    81       Keyword.PRF_ASM_GOAL -> KEYWORD3,
    82       Keyword.PRF_ASM_GOAL_SCRIPT -> DIGIT
    83     ).withDefaultValue(KEYWORD1)
    84   }
    85 
    86   private val token_style: Map[Token.Kind.Value, Byte] =
    87   {
    88     import JEditToken._
    89     Map[Token.Kind.Value, Byte](
    90       Token.Kind.KEYWORD -> KEYWORD2,
    91       Token.Kind.IDENT -> NULL,
    92       Token.Kind.LONG_IDENT -> NULL,
    93       Token.Kind.SYM_IDENT -> NULL,
    94       Token.Kind.VAR -> NULL,
    95       Token.Kind.TYPE_IDENT -> NULL,
    96       Token.Kind.TYPE_VAR -> NULL,
    97       Token.Kind.NAT -> NULL,
    98       Token.Kind.FLOAT -> NULL,
    99       Token.Kind.STRING -> LITERAL1,
   100       Token.Kind.ALT_STRING -> LITERAL2,
   101       Token.Kind.VERBATIM -> COMMENT3,
   102       Token.Kind.CARTOUCHE -> COMMENT4,
   103       Token.Kind.SPACE -> NULL,
   104       Token.Kind.COMMENT -> COMMENT1,
   105       Token.Kind.ERROR -> INVALID
   106     ).withDefaultValue(NULL)
   107   }
   108 
   109   def token_markup(syntax: Outer_Syntax, token: Token): Byte =
   110     if (token.is_command) command_style(syntax.keyword_kind(token.content).getOrElse(""))
   111     else if (token.is_delimiter) JEditToken.OPERATOR
   112     else token_style(token.kind)
   113 
   114 
   115   /* Isabelle/ML token markup */
   116 
   117   private val ml_token_style: Map[ML_Lex.Kind.Value, Byte] =
   118   {
   119     import JEditToken._
   120     Map[ML_Lex.Kind.Value, Byte](
   121       ML_Lex.Kind.KEYWORD -> NULL,
   122       ML_Lex.Kind.IDENT -> NULL,
   123       ML_Lex.Kind.LONG_IDENT -> NULL,
   124       ML_Lex.Kind.TYPE_VAR -> NULL,
   125       ML_Lex.Kind.WORD -> DIGIT,
   126       ML_Lex.Kind.INT -> DIGIT,
   127       ML_Lex.Kind.REAL -> DIGIT,
   128       ML_Lex.Kind.CHAR -> LITERAL2,
   129       ML_Lex.Kind.STRING -> LITERAL1,
   130       ML_Lex.Kind.SPACE -> NULL,
   131       ML_Lex.Kind.COMMENT -> COMMENT1,
   132       ML_Lex.Kind.ANTIQ -> NULL,
   133       ML_Lex.Kind.ANTIQ_START -> LITERAL4,
   134       ML_Lex.Kind.ANTIQ_STOP -> LITERAL4,
   135       ML_Lex.Kind.ANTIQ_OTHER -> NULL,
   136       ML_Lex.Kind.ANTIQ_STRING -> NULL,
   137       ML_Lex.Kind.ANTIQ_ALT_STRING -> NULL,
   138       ML_Lex.Kind.ANTIQ_CARTOUCHE -> NULL,
   139       ML_Lex.Kind.ERROR -> INVALID
   140     ).withDefaultValue(NULL)
   141   }
   142 
   143   def ml_token_markup(token: ML_Lex.Token): Byte =
   144     if (!token.is_keyword) ml_token_style(token.kind)
   145     else if (token.is_delimiter) JEditToken.OPERATOR
   146     else if (ML_Lex.keywords2(token.source)) JEditToken.KEYWORD2
   147     else if (ML_Lex.keywords3(token.source)) JEditToken.KEYWORD3
   148     else JEditToken.KEYWORD1
   149 }
   150 
   151 
   152 class Rendering private(val snapshot: Document.Snapshot, val options: Options)
   153 {
   154   /* colors */
   155 
   156   def color_value(s: String): Color = Color_Value(options.string(s))
   157 
   158   val outdated_color = color_value("outdated_color")
   159   val unprocessed_color = color_value("unprocessed_color")
   160   val unprocessed1_color = color_value("unprocessed1_color")
   161   val running_color = color_value("running_color")
   162   val running1_color = color_value("running1_color")
   163   val light_color = color_value("light_color")
   164   val bullet_color = color_value("bullet_color")
   165   val tooltip_color = color_value("tooltip_color")
   166   val writeln_color = color_value("writeln_color")
   167   val information_color = color_value("information_color")
   168   val warning_color = color_value("warning_color")
   169   val error_color = color_value("error_color")
   170   val error1_color = color_value("error1_color")
   171   val writeln_message_color = color_value("writeln_message_color")
   172   val information_message_color = color_value("information_message_color")
   173   val tracing_message_color = color_value("tracing_message_color")
   174   val warning_message_color = color_value("warning_message_color")
   175   val error_message_color = color_value("error_message_color")
   176   val bad_color = color_value("bad_color")
   177   val intensify_color = color_value("intensify_color")
   178   val quoted_color = color_value("quoted_color")
   179   val antiquoted_color = color_value("antiquoted_color")
   180   val antiquote_color = color_value("antiquote_color")
   181   val highlight_color = color_value("highlight_color")
   182   val hyperlink_color = color_value("hyperlink_color")
   183   val active_color = color_value("active_color")
   184   val active_hover_color = color_value("active_hover_color")
   185   val active_result_color = color_value("active_result_color")
   186   val keyword1_color = color_value("keyword1_color")
   187   val keyword2_color = color_value("keyword2_color")
   188   val keyword3_color = color_value("keyword3_color")
   189 
   190   val tfree_color = color_value("tfree_color")
   191   val tvar_color = color_value("tvar_color")
   192   val free_color = color_value("free_color")
   193   val skolem_color = color_value("skolem_color")
   194   val bound_color = color_value("bound_color")
   195   val var_color = color_value("var_color")
   196   val inner_numeral_color = color_value("inner_numeral_color")
   197   val inner_quoted_color = color_value("inner_quoted_color")
   198   val inner_cartouche_color = color_value("inner_cartouche_color")
   199   val inner_comment_color = color_value("inner_comment_color")
   200   val dynamic_color = color_value("dynamic_color")
   201 
   202 
   203   /* completion context */
   204 
   205   private val completion_elements =
   206     Set(Markup.STRING, Markup.ALTSTRING, Markup.VERBATIM, Markup.CARTOUCHE,
   207       Markup.COMMENT, Markup.LANGUAGE, Markup.ML_STRING, Markup.ML_COMMENT)
   208 
   209   def completion_context(caret: Text.Offset): Option[Completion.Context] =
   210     if (caret > 0) {
   211       val result =
   212         snapshot.select_markup(Text.Range(caret - 1, caret + 1), completion_elements, _ =>
   213           {
   214             case Text.Info(_, elem)
   215             if elem.name == Markup.ML_STRING || elem.name == Markup.ML_COMMENT =>
   216               Some(Completion.Context(Markup.Language.ML, true))
   217             case Text.Info(_, XML.Elem(Markup.Language(language, symbols), _)) =>
   218               Some(Completion.Context(language, symbols))
   219             case Text.Info(_, XML.Elem(markup, _)) =>
   220               Some(Completion.Context(Markup.Language.UNKNOWN, true))
   221           })
   222       result match {
   223         case Text.Info(_, context) :: _ => Some(context)
   224         case Nil => None
   225       }
   226     }
   227     else None
   228 
   229 
   230   /* command overview */
   231 
   232   val overview_limit = options.int("jedit_text_overview_limit")
   233 
   234   private val overview_elements =
   235     Protocol.command_status_markup + Markup.WARNING + Markup.ERROR
   236 
   237   def overview_color(range: Text.Range): Option[Color] =
   238   {
   239     if (snapshot.is_outdated) None
   240     else {
   241       val results =
   242         snapshot.cumulate_markup[(Protocol.Status, Int)](
   243           range, (Protocol.Status.init, 0), overview_elements, _ =>
   244           {
   245             case ((status, pri), Text.Info(_, elem)) =>
   246               if (Protocol.command_status_markup(elem.name))
   247                 Some((Protocol.command_status(status, elem.markup), pri))
   248               else
   249                 Some((status, pri max Rendering.message_pri(elem.name)))
   250           })
   251       if (results.isEmpty) None
   252       else {
   253         val (status, pri) =
   254           ((Protocol.Status.init, 0) /: results) {
   255             case ((s1, p1), Text.Info(_, (s2, p2))) => (s1 + s2, p1 max p2) }
   256 
   257         if (status.is_running) Some(running_color)
   258         else if (pri == Rendering.warning_pri) Some(warning_color)
   259         else if (pri == Rendering.error_pri) Some(error_color)
   260         else if (status.is_unprocessed) Some(unprocessed_color)
   261         else if (status.is_failed) Some(error_color)
   262         else None
   263       }
   264     }
   265   }
   266 
   267 
   268   /* markup selectors */
   269 
   270   private val highlight_elements =
   271     Set(Markup.LANGUAGE, Markup.ML_TYPING, Markup.TOKEN_RANGE,
   272       Markup.ENTITY, Markup.PATH, Markup.URL, Markup.SORTING,
   273       Markup.TYPING, Markup.FREE, Markup.SKOLEM, Markup.BOUND,
   274       Markup.VAR, Markup.TFREE, Markup.TVAR)
   275 
   276   def highlight(range: Text.Range): Option[Text.Info[Color]] =
   277   {
   278     snapshot.select_markup(range, highlight_elements, _ =>
   279       {
   280         case info => Some(Text.Info(snapshot.convert(info.range), highlight_color))
   281       }) match { case Text.Info(_, info) :: _ => Some(info) case _ => None }
   282   }
   283 
   284 
   285   private val hyperlink_elements =
   286     Set(Markup.ENTITY, Markup.PATH, Markup.POSITION, Markup.URL)
   287 
   288   private def hyperlink_file(line: Int, name: String): Option[PIDE.editor.Hyperlink] =
   289     if (Path.is_ok(name))
   290       Isabelle_System.source_file(Path.explode(name)).map(path =>
   291         PIDE.editor.hyperlink_file(Isabelle_System.platform_path(path), line))
   292     else None
   293 
   294   private def hyperlink_command(id: Document_ID.Generic, offset: Text.Offset)
   295       : Option[PIDE.editor.Hyperlink] =
   296     snapshot.state.find_command(snapshot.version, id) match {
   297       case Some((node, command)) =>
   298         PIDE.editor.hyperlink_command(snapshot, command, offset)
   299       case None => None
   300     }
   301 
   302   def hyperlink(range: Text.Range): Option[Text.Info[PIDE.editor.Hyperlink]] =
   303   {
   304     snapshot.cumulate_markup[Vector[Text.Info[PIDE.editor.Hyperlink]]](
   305       range, Vector.empty, hyperlink_elements, _ =>
   306         {
   307           case (links, Text.Info(info_range, XML.Elem(Markup.Path(name), _)))
   308           if Path.is_ok(name) =>
   309             val jedit_file = PIDE.thy_load.append(snapshot.node_name.master_dir, Path.explode(name))
   310             val link = PIDE.editor.hyperlink_file(jedit_file)
   311             Some(links :+ Text.Info(snapshot.convert(info_range), link))
   312 
   313           case (links, Text.Info(info_range, XML.Elem(Markup.Url(name), _))) =>
   314             val link = PIDE.editor.hyperlink_url(name)
   315             Some(links :+ Text.Info(snapshot.convert(info_range), link))
   316 
   317           case (links, Text.Info(info_range, XML.Elem(Markup(Markup.ENTITY, props), _)))
   318           if !props.exists(
   319             { case (Markup.KIND, Markup.ML_OPEN) => true
   320               case (Markup.KIND, Markup.ML_STRUCT) => true
   321               case _ => false }) =>
   322 
   323             val opt_link =
   324               props match {
   325                 case Position.Def_Line_File(line, name) => hyperlink_file(line, name)
   326                 case Position.Def_Id_Offset(id, offset) => hyperlink_command(id, offset)
   327                 case _ => None
   328               }
   329             opt_link.map(link => (links :+ Text.Info(snapshot.convert(info_range), link)))
   330 
   331           case (links, Text.Info(info_range, XML.Elem(Markup(Markup.POSITION, props), _))) =>
   332             val opt_link =
   333               props match {
   334                 case Position.Line_File(line, name) => hyperlink_file(line, name)
   335                 case Position.Id_Offset(id, offset) => hyperlink_command(id, offset)
   336                 case _ => None
   337               }
   338             opt_link.map(link => links :+ (Text.Info(snapshot.convert(info_range), link)))
   339 
   340           case _ => None
   341         }) match { case Text.Info(_, _ :+ info) :: _ => Some(info) case _ => None }
   342   }
   343 
   344 
   345   private val active_elements =
   346     Set(Markup.DIALOG, Markup.BROWSER, Markup.GRAPHVIEW, Markup.SENDBACK, Markup.SIMP_TRACE)
   347 
   348   def active(range: Text.Range): Option[Text.Info[XML.Elem]] =
   349     snapshot.select_markup(range, active_elements, command_state =>
   350       {
   351         case Text.Info(info_range, elem) =>
   352           if (elem.name == Markup.DIALOG) {
   353             elem match {
   354               case Protocol.Dialog(_, serial, _)
   355               if !command_state.results.defined(serial) =>
   356                 Some(Text.Info(snapshot.convert(info_range), elem))
   357               case _ => None
   358             }
   359           }
   360           else Some(Text.Info(snapshot.convert(info_range), elem))
   361       }) match { case Text.Info(_, info) :: _ => Some(info) case _ => None }
   362 
   363 
   364   def command_results(range: Text.Range): Command.Results =
   365   {
   366     val results =
   367       snapshot.select_markup[Command.Results](range, _ => true, command_state =>
   368         { case _ => Some(command_state.results) }).map(_.info)
   369     (Command.Results.empty /: results)(_ ++ _)
   370   }
   371 
   372   private val tooltip_message_elements =
   373     Set(Markup.WRITELN, Markup.WARNING, Markup.ERROR, Markup.BAD)
   374 
   375   def tooltip_message(range: Text.Range): Option[Text.Info[XML.Body]] =
   376   {
   377     val results =
   378       snapshot.cumulate_markup[List[Text.Info[Command.Results.Entry]]](
   379         range, Nil, tooltip_message_elements, _ =>
   380         {
   381           case (msgs, Text.Info(info_range,
   382             XML.Elem(Markup(name, props @ Markup.Serial(serial)), body)))
   383           if name == Markup.WRITELN || name == Markup.WARNING || name == Markup.ERROR =>
   384             val entry: Command.Results.Entry =
   385               (serial -> XML.Elem(Markup(Markup.message(name), props), body))
   386             Some(Text.Info(snapshot.convert(info_range), entry) :: msgs)
   387 
   388           case (msgs, Text.Info(info_range, msg @ XML.Elem(Markup(Markup.BAD, _), body)))
   389           if !body.isEmpty =>
   390             val entry: Command.Results.Entry = (Document_ID.make(), msg)
   391             Some(Text.Info(snapshot.convert(info_range), entry) :: msgs)
   392 
   393           case _ => None
   394         }).flatMap(_.info)
   395     if (results.isEmpty) None
   396     else {
   397       val r = Text.Range(results.head.range.start, results.last.range.stop)
   398       val msgs = Command.Results.make(results.map(_.info))
   399       Some(Text.Info(r, Pretty.separate(msgs.entries.map(_._2).toList)))
   400     }
   401   }
   402 
   403 
   404   private val tooltips: Map[String, String] =
   405     Map(
   406       Markup.TOKEN_RANGE -> "inner syntax token",
   407       Markup.FREE -> "free variable",
   408       Markup.SKOLEM -> "skolem variable",
   409       Markup.BOUND -> "bound variable",
   410       Markup.VAR -> "schematic variable",
   411       Markup.TFREE -> "free type variable",
   412       Markup.TVAR -> "schematic type variable")
   413 
   414   private val tooltip_elements =
   415     Set(Markup.LANGUAGE, Markup.TIMING, Markup.ENTITY, Markup.SORTING,
   416       Markup.TYPING, Markup.ML_TYPING, Markup.PATH, Markup.URL) ++
   417       tooltips.keys
   418 
   419   private def pretty_typing(kind: String, body: XML.Body): XML.Tree =
   420     Pretty.block(XML.Text(kind) :: Pretty.Break(1) :: body)
   421 
   422   private val timing_threshold: Double = options.real("jedit_timing_threshold")
   423 
   424   def tooltip(range: Text.Range): Option[Text.Info[XML.Body]] =
   425   {
   426     def add(prev: Text.Info[(Timing, Vector[(Boolean, XML.Tree)])],
   427       r0: Text.Range, p: (Boolean, XML.Tree)): Text.Info[(Timing, Vector[(Boolean, XML.Tree)])] =
   428     {
   429       val r = snapshot.convert(r0)
   430       val (t, info) = prev.info
   431       if (prev.range == r)
   432         Text.Info(r, (t, info :+ p))
   433       else Text.Info(r, (t, Vector(p)))
   434     }
   435 
   436     val results =
   437       snapshot.cumulate_markup[Text.Info[(Timing, Vector[(Boolean, XML.Tree)])]](
   438         range, Text.Info(range, (Timing.zero, Vector.empty)), tooltip_elements, _ =>
   439         {
   440           case (Text.Info(r, (t1, info)), Text.Info(_, XML.Elem(Markup.Timing(t2), _))) =>
   441             Some(Text.Info(r, (t1 + t2, info)))
   442           case (prev, Text.Info(r, XML.Elem(Markup.Entity(kind, name), _))) =>
   443             val kind1 = space_explode('_', kind).mkString(" ")
   444             val txt1 = kind1 + " " + quote(name)
   445             val t = prev.info._1
   446             val txt2 =
   447               if (kind == Markup.COMMAND && t.elapsed.seconds >= timing_threshold)
   448                 "\n" + t.message
   449               else ""
   450             Some(add(prev, r, (true, XML.Text(txt1 + txt2))))
   451           case (prev, Text.Info(r, XML.Elem(Markup.Path(name), _)))
   452           if Path.is_ok(name) =>
   453             val jedit_file = PIDE.thy_load.append(snapshot.node_name.master_dir, Path.explode(name))
   454             Some(add(prev, r, (true, XML.Text("file " + quote(jedit_file)))))
   455           case (prev, Text.Info(r, XML.Elem(Markup.Url(name), _))) =>
   456             Some(add(prev, r, (true, XML.Text("URL " + quote(name)))))
   457           case (prev, Text.Info(r, XML.Elem(Markup(name, _), body)))
   458           if name == Markup.SORTING || name == Markup.TYPING =>
   459             Some(add(prev, r, (true, pretty_typing("::", body))))
   460           case (prev, Text.Info(r, XML.Elem(Markup(Markup.ML_TYPING, _), body))) =>
   461             Some(add(prev, r, (false, pretty_typing("ML:", body))))
   462           case (prev, Text.Info(r, XML.Elem(Markup.Language(language, _), _))) =>
   463             Some(add(prev, r, (true, XML.Text("language: " + language))))
   464           case (prev, Text.Info(r, XML.Elem(Markup(name, _), _))) =>
   465             if (tooltips.isDefinedAt(name))
   466               Some(add(prev, r, (true, XML.Text(tooltips(name)))))
   467             else None
   468         }).map(_.info)
   469 
   470     results.map(_.info).flatMap(res => res._2.toList) match {
   471       case Nil => None
   472       case tips =>
   473         val r = Text.Range(results.head.range.start, results.last.range.stop)
   474         val all_tips = (tips.filter(_._1) ++ tips.filter(!_._1).lastOption.toList).map(_._2)
   475         Some(Text.Info(r, Library.separate(Pretty.FBreak, all_tips)))
   476     }
   477   }
   478 
   479   val tooltip_margin: Int = options.int("jedit_tooltip_margin")
   480 
   481   lazy val tooltip_close_icon = JEdit_Lib.load_icon(options.string("tooltip_close_icon"))
   482   lazy val tooltip_detach_icon = JEdit_Lib.load_icon(options.string("tooltip_detach_icon"))
   483 
   484 
   485   private lazy val gutter_icons = Map(
   486     Rendering.information_pri -> JEdit_Lib.load_icon(options.string("gutter_information_icon")),
   487     Rendering.warning_pri -> JEdit_Lib.load_icon(options.string("gutter_warning_icon")),
   488     Rendering.legacy_pri -> JEdit_Lib.load_icon(options.string("gutter_legacy_icon")),
   489     Rendering.error_pri -> JEdit_Lib.load_icon(options.string("gutter_error_icon")))
   490 
   491   private val gutter_elements =
   492     Set(Markup.WRITELN, Markup.WARNING, Markup.ERROR)
   493 
   494   def gutter_message(range: Text.Range): Option[Icon] =
   495   {
   496     val results =
   497       snapshot.cumulate_markup[Int](range, 0, gutter_elements, _ =>
   498         {
   499           case (pri, Text.Info(_, XML.Elem(Markup(Markup.WRITELN, _),
   500               List(XML.Elem(Markup(Markup.INFORMATION, _), _))))) =>
   501             Some(pri max Rendering.information_pri)
   502           case (pri, Text.Info(_, XML.Elem(Markup(Markup.WARNING, _), body))) =>
   503             body match {
   504               case List(XML.Elem(Markup(Markup.LEGACY, _), _)) =>
   505                 Some(pri max Rendering.legacy_pri)
   506               case _ =>
   507                 Some(pri max Rendering.warning_pri)
   508             }
   509           case (pri, Text.Info(_, XML.Elem(Markup(Markup.ERROR, _), _))) =>
   510             Some(pri max Rendering.error_pri)
   511           case _ => None
   512         })
   513     val pri = (0 /: results) { case (p1, Text.Info(_, p2)) => p1 max p2 }
   514     gutter_icons.get(pri)
   515   }
   516 
   517 
   518   private val squiggly_colors = Map(
   519     Rendering.writeln_pri -> writeln_color,
   520     Rendering.information_pri -> information_color,
   521     Rendering.warning_pri -> warning_color,
   522     Rendering.error_pri -> error_color)
   523 
   524   private val squiggly_elements = Set(Markup.WRITELN, Markup.WARNING, Markup.ERROR)
   525 
   526   def squiggly_underline(range: Text.Range): List[Text.Info[Color]] =
   527   {
   528     val results =
   529       snapshot.cumulate_markup[Int](range, 0, squiggly_elements, _ =>
   530         {
   531           case (pri, Text.Info(_, elem)) =>
   532             if (Protocol.is_information(elem))
   533               Some(pri max Rendering.information_pri)
   534             else
   535               Some(pri max Rendering.message_pri(elem.name))
   536         })
   537     for {
   538       Text.Info(r, pri) <- results
   539       color <- squiggly_colors.get(pri)
   540     } yield Text.Info(r, color)
   541   }
   542 
   543 
   544   private val message_colors = Map(
   545     Rendering.writeln_pri -> writeln_message_color,
   546     Rendering.information_pri -> information_message_color,
   547     Rendering.tracing_pri -> tracing_message_color,
   548     Rendering.warning_pri -> warning_message_color,
   549     Rendering.error_pri -> error_message_color)
   550 
   551   private val line_background_elements =
   552     Set(Markup.WRITELN_MESSAGE, Markup.TRACING_MESSAGE, Markup.WARNING_MESSAGE,
   553       Markup.ERROR_MESSAGE, Markup.INFORMATION)
   554 
   555   def line_background(range: Text.Range): Option[(Color, Boolean)] =
   556   {
   557     val results =
   558       snapshot.cumulate_markup[Int](range, 0, line_background_elements, _ =>
   559         {
   560           case (pri, Text.Info(_, elem)) =>
   561             if (elem.name == Markup.INFORMATION)
   562               Some(pri max Rendering.information_pri)
   563             else
   564               Some(pri max Rendering.message_pri(elem.name))
   565         })
   566     val pri = (0 /: results) { case (p1, Text.Info(_, p2)) => p1 max p2 }
   567 
   568     val is_separator =
   569       pri > 0 &&
   570       snapshot.cumulate_markup[Boolean](range, false, Set(Markup.SEPARATOR), _ =>
   571         {
   572           case _ => Some(true)
   573         }).exists(_.info)
   574 
   575     message_colors.get(pri).map((_, is_separator))
   576   }
   577 
   578 
   579   def output_messages(st: Command.State): List[XML.Tree] =
   580     st.results.entries.map(_._2).filterNot(Protocol.is_result(_)).toList
   581 
   582 
   583   private val background1_elements =
   584     Protocol.command_status_markup + Markup.WRITELN_MESSAGE + Markup.TRACING_MESSAGE +
   585       Markup.WARNING_MESSAGE + Markup.ERROR_MESSAGE + Markup.BAD + Markup.INTENSIFY ++
   586       active_elements
   587 
   588   def background1(range: Text.Range): List[Text.Info[Color]] =
   589   {
   590     if (snapshot.is_outdated) List(Text.Info(range, outdated_color))
   591     else
   592       for {
   593         Text.Info(r, result) <-
   594           snapshot.cumulate_markup[(Option[Protocol.Status], Option[Color])](
   595             range, (Some(Protocol.Status.init), None), background1_elements, command_state =>
   596             {
   597               case (((Some(status), color), Text.Info(_, XML.Elem(markup, _))))
   598               if (Protocol.command_status_markup(markup.name)) =>
   599                 Some((Some(Protocol.command_status(status, markup)), color))
   600               case (_, Text.Info(_, XML.Elem(Markup(Markup.BAD, _), _))) =>
   601                 Some((None, Some(bad_color)))
   602               case (_, Text.Info(_, XML.Elem(Markup(Markup.INTENSIFY, _), _))) =>
   603                 Some((None, Some(intensify_color)))
   604               case (acc, Text.Info(_, Protocol.Dialog(_, serial, result))) =>
   605                 command_state.results.get(serial) match {
   606                   case Some(Protocol.Dialog_Result(res)) if res == result =>
   607                     Some((None, Some(active_result_color)))
   608                   case _ =>
   609                     Some((None, Some(active_color)))
   610                 }
   611               case (_, Text.Info(_, elem)) =>
   612                 if (active_elements(elem.name)) Some((None, Some(active_color)))
   613                 else None
   614             })
   615         color <-
   616           (result match {
   617             case (Some(status), opt_color) =>
   618               if (status.is_unprocessed) Some(unprocessed1_color)
   619               else if (status.is_running) Some(running1_color)
   620               else opt_color
   621             case (_, opt_color) => opt_color
   622           })
   623       } yield Text.Info(r, color)
   624   }
   625 
   626 
   627   def background2(range: Text.Range): List[Text.Info[Color]] =
   628     snapshot.select_markup(range, Set(Markup.TOKEN_RANGE), _ => _ => Some(light_color))
   629 
   630 
   631   def bullet(range: Text.Range): List[Text.Info[Color]] =
   632     snapshot.select_markup(range, Set(Markup.BULLET), _ => _ => Some(bullet_color))
   633 
   634 
   635   private val foreground_elements =
   636     Set(Markup.STRING, Markup.ALTSTRING, Markup.VERBATIM, Markup.CARTOUCHE, Markup.ANTIQUOTED)
   637 
   638   def foreground(range: Text.Range): List[Text.Info[Color]] =
   639     snapshot.select_markup(range, foreground_elements, _ =>
   640       {
   641         case Text.Info(_, elem) =>
   642           if (elem.name == Markup.ANTIQUOTED) Some(antiquoted_color) else Some(quoted_color)
   643       })
   644 
   645 
   646   private val text_colors: Map[String, Color] = Map(
   647       Markup.KEYWORD1 -> keyword1_color,
   648       Markup.KEYWORD2 -> keyword2_color,
   649       Markup.STRING -> Color.BLACK,
   650       Markup.ALTSTRING -> Color.BLACK,
   651       Markup.VERBATIM -> Color.BLACK,
   652       Markup.CARTOUCHE -> Color.BLACK,
   653       Markup.LITERAL -> keyword1_color,
   654       Markup.DELIMITER -> Color.BLACK,
   655       Markup.TFREE -> tfree_color,
   656       Markup.TVAR -> tvar_color,
   657       Markup.FREE -> free_color,
   658       Markup.SKOLEM -> skolem_color,
   659       Markup.BOUND -> bound_color,
   660       Markup.VAR -> var_color,
   661       Markup.INNER_STRING -> inner_quoted_color,
   662       Markup.INNER_CARTOUCHE -> inner_cartouche_color,
   663       Markup.INNER_COMMENT -> inner_comment_color,
   664       Markup.DYNAMIC_FACT -> dynamic_color,
   665       Markup.ANTIQUOTE -> antiquote_color,
   666       Markup.ML_KEYWORD1 -> keyword1_color,
   667       Markup.ML_KEYWORD2 -> keyword2_color,
   668       Markup.ML_KEYWORD3 -> keyword3_color,
   669       Markup.ML_DELIMITER -> Color.BLACK,
   670       Markup.ML_NUMERAL -> inner_numeral_color,
   671       Markup.ML_CHAR -> inner_quoted_color,
   672       Markup.ML_STRING -> inner_quoted_color,
   673       Markup.ML_COMMENT -> inner_comment_color)
   674 
   675   private val text_color_elements = text_colors.keySet
   676 
   677   def text_color(range: Text.Range, color: Color): List[Text.Info[Color]] =
   678   {
   679     if (color == Token_Markup.hidden_color) List(Text.Info(range, color))
   680     else
   681       snapshot.cumulate_markup(range, color, text_color_elements, _ =>
   682         {
   683           case (_, Text.Info(_, elem)) => text_colors.get(elem.name)
   684         })
   685   }
   686 
   687 
   688   /* nested text structure -- folds */
   689 
   690   private val fold_depth_elements =
   691     Set(Markup.TEXT_FOLD, Markup.GOAL, Markup.SUBGOAL)
   692 
   693   def fold_depth(range: Text.Range): List[Text.Info[Int]] =
   694     snapshot.cumulate_markup[Int](range, 0, fold_depth_elements, _ =>
   695       {
   696         case (depth, _) => Some(depth + 1)
   697       })
   698 }