src/Tools/jEdit/src/rendering.scala
author wenzelm
Thu Feb 20 16:00:37 2014 +0100 (2014-02-20 ago)
changeset 55620 19dffae33cde
parent 55619 c5aeeacdd2b1
child 55622 ce575c2212fc
permissions -rw-r--r--
cumulate/select wrt. precise elements guard;
tuned signature;
     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)
   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(_, XML.Elem(Markup.Language(language, symbols), _)) =>
   215               Some(Completion.Context(language, symbols))
   216             case Text.Info(_, XML.Elem(markup, _)) =>
   217               Some(Completion.Context(Markup.Language.UNKNOWN, true))
   218           })
   219       result match {
   220         case Text.Info(_, context) :: _ => Some(context)
   221         case Nil => None
   222       }
   223     }
   224     else None
   225 
   226 
   227   /* command overview */
   228 
   229   val overview_limit = options.int("jedit_text_overview_limit")
   230 
   231   private val overview_elements =
   232     Protocol.command_status_markup + Markup.WARNING + Markup.ERROR
   233 
   234   def overview_color(range: Text.Range): Option[Color] =
   235   {
   236     if (snapshot.is_outdated) None
   237     else {
   238       val results =
   239         snapshot.cumulate_markup[(Protocol.Status, Int)](
   240           range, (Protocol.Status.init, 0), overview_elements, _ =>
   241           {
   242             case ((status, pri), Text.Info(_, elem)) =>
   243               if (elem.name == Markup.WARNING || elem.name == Markup.ERROR)
   244                 Some((status, pri max Rendering.message_pri(elem.name)))
   245               else
   246                 Some((Protocol.command_status(status, elem.markup), pri))
   247           })
   248       if (results.isEmpty) None
   249       else {
   250         val (status, pri) =
   251           ((Protocol.Status.init, 0) /: results) {
   252             case ((s1, p1), Text.Info(_, (s2, p2))) => (s1 + s2, p1 max p2) }
   253 
   254         if (status.is_running) Some(running_color)
   255         else if (pri == Rendering.warning_pri) Some(warning_color)
   256         else if (pri == Rendering.error_pri) Some(error_color)
   257         else if (status.is_unprocessed) Some(unprocessed_color)
   258         else if (status.is_failed) Some(error_color)
   259         else None
   260       }
   261     }
   262   }
   263 
   264 
   265   /* markup selectors */
   266 
   267   private val highlight_elements =
   268     Set(Markup.LANGUAGE, Markup.ML_TYPING, Markup.TOKEN_RANGE,
   269       Markup.ENTITY, Markup.PATH, Markup.URL, Markup.SORTING,
   270       Markup.TYPING, Markup.FREE, Markup.SKOLEM, Markup.BOUND,
   271       Markup.VAR, Markup.TFREE, Markup.TVAR)
   272 
   273   def highlight(range: Text.Range): Option[Text.Info[Color]] =
   274   {
   275     snapshot.select_markup(range, highlight_elements, _ =>
   276       {
   277         case info => Some(Text.Info(snapshot.convert(info.range), highlight_color))
   278       }) match { case Text.Info(_, info) :: _ => Some(info) case _ => None }
   279   }
   280 
   281 
   282   private val hyperlink_elements =
   283     Set(Markup.ENTITY, Markup.PATH, Markup.POSITION, Markup.URL)
   284 
   285   private def hyperlink_file(line: Int, name: String): Option[PIDE.editor.Hyperlink] =
   286     if (Path.is_ok(name))
   287       Isabelle_System.source_file(Path.explode(name)).map(path =>
   288         PIDE.editor.hyperlink_file(Isabelle_System.platform_path(path), line))
   289     else None
   290 
   291   private def hyperlink_command(id: Document_ID.Generic, offset: Text.Offset)
   292       : Option[PIDE.editor.Hyperlink] =
   293     snapshot.state.find_command(snapshot.version, id) match {
   294       case Some((node, command)) =>
   295         PIDE.editor.hyperlink_command(snapshot, command, offset)
   296       case None => None
   297     }
   298 
   299   def hyperlink(range: Text.Range): Option[Text.Info[PIDE.editor.Hyperlink]] =
   300   {
   301     snapshot.cumulate_markup[List[Text.Info[PIDE.editor.Hyperlink]]](
   302       range, Nil, hyperlink_elements, _ =>
   303         {
   304           case (links, Text.Info(info_range, XML.Elem(Markup.Path(name), _)))
   305           if Path.is_ok(name) =>
   306             val jedit_file = PIDE.thy_load.append(snapshot.node_name.master_dir, Path.explode(name))
   307             val link = PIDE.editor.hyperlink_file(jedit_file)
   308             Some(Text.Info(snapshot.convert(info_range), link) :: links)
   309 
   310           case (links, Text.Info(info_range, XML.Elem(Markup.Url(name), _))) =>
   311             val link = PIDE.editor.hyperlink_url(name)
   312             Some(Text.Info(snapshot.convert(info_range), link) :: links)
   313 
   314           case (links, Text.Info(info_range, XML.Elem(Markup(Markup.ENTITY, props), _)))
   315           if !props.exists(
   316             { case (Markup.KIND, Markup.ML_OPEN) => true
   317               case (Markup.KIND, Markup.ML_STRUCT) => true
   318               case _ => false }) =>
   319 
   320             val opt_link =
   321               props match {
   322                 case Position.Def_Line_File(line, name) => hyperlink_file(line, name)
   323                 case Position.Def_Id_Offset(id, offset) => hyperlink_command(id, offset)
   324                 case _ => None
   325               }
   326             opt_link.map(link => (Text.Info(snapshot.convert(info_range), link) :: links))
   327 
   328           case (links, Text.Info(info_range, XML.Elem(Markup(Markup.POSITION, props), _))) =>
   329             val opt_link =
   330               props match {
   331                 case Position.Line_File(line, name) => hyperlink_file(line, name)
   332                 case Position.Id_Offset(id, offset) => hyperlink_command(id, offset)
   333                 case _ => None
   334               }
   335             opt_link.map(link => (Text.Info(snapshot.convert(info_range), link) :: links))
   336 
   337           case _ => None
   338         }) match { case Text.Info(_, info :: _) :: _ => Some(info) case _ => None }
   339   }
   340 
   341 
   342   private val active_elements =
   343     Set(Markup.BROWSER, Markup.GRAPHVIEW, Markup.SENDBACK, Markup.DIALOG, Markup.SIMP_TRACE)
   344 
   345   def active(range: Text.Range): Option[Text.Info[XML.Elem]] =
   346     snapshot.select_markup(range, active_elements, command_state =>
   347       {
   348         case Text.Info(info_range, elem @ Protocol.Dialog(_, serial, _))
   349         if !command_state.results.defined(serial) =>
   350           Some(Text.Info(snapshot.convert(info_range), elem))
   351         case Text.Info(info_range, elem) =>
   352           if (elem.name == Markup.BROWSER ||
   353               elem.name == Markup.GRAPHVIEW ||
   354               elem.name == Markup.SENDBACK ||
   355               elem.name == Markup.SIMP_TRACE)
   356             Some(Text.Info(snapshot.convert(info_range), elem))
   357           else None
   358       }) match { case Text.Info(_, info) :: _ => Some(info) case _ => None }
   359 
   360 
   361   def command_results(range: Text.Range): Command.Results =
   362   {
   363     val results =
   364       snapshot.select_markup[Command.Results](range, _ => true, command_state =>
   365         { case _ => Some(command_state.results) }).map(_.info)
   366     (Command.Results.empty /: results)(_ ++ _)
   367   }
   368 
   369   private val tooltip_message_elements =
   370     Set(Markup.WRITELN, Markup.WARNING, Markup.ERROR, Markup.BAD)
   371 
   372   def tooltip_message(range: Text.Range): Option[Text.Info[XML.Body]] =
   373   {
   374     val results =
   375       snapshot.cumulate_markup[List[Text.Info[Command.Results.Entry]]](
   376         range, Nil, tooltip_message_elements, _ =>
   377         {
   378           case (msgs, Text.Info(info_range,
   379             XML.Elem(Markup(name, props @ Markup.Serial(serial)), body)))
   380           if name == Markup.WRITELN || name == Markup.WARNING || name == Markup.ERROR =>
   381             val entry: Command.Results.Entry =
   382               (serial -> XML.Elem(Markup(Markup.message(name), props), body))
   383             Some(Text.Info(snapshot.convert(info_range), entry) :: msgs)
   384 
   385           case (msgs, Text.Info(info_range, msg @ XML.Elem(Markup(Markup.BAD, _), body)))
   386           if !body.isEmpty =>
   387             val entry: Command.Results.Entry = (Document_ID.make(), msg)
   388             Some(Text.Info(snapshot.convert(info_range), entry) :: msgs)
   389 
   390           case _ => None
   391         }).flatMap(_.info)
   392     if (results.isEmpty) None
   393     else {
   394       val r = Text.Range(results.head.range.start, results.last.range.stop)
   395       val msgs = Command.Results.make(results.map(_.info))
   396       Some(Text.Info(r, Pretty.separate(msgs.entries.map(_._2).toList)))
   397     }
   398   }
   399 
   400 
   401   private val tooltips: Map[String, String] =
   402     Map(
   403       Markup.TOKEN_RANGE -> "inner syntax token",
   404       Markup.FREE -> "free variable",
   405       Markup.SKOLEM -> "skolem variable",
   406       Markup.BOUND -> "bound variable",
   407       Markup.VAR -> "schematic variable",
   408       Markup.TFREE -> "free type variable",
   409       Markup.TVAR -> "schematic type variable")
   410 
   411   private val tooltip_elements =
   412     Set(Markup.LANGUAGE, Markup.TIMING, Markup.ENTITY, Markup.SORTING,
   413       Markup.TYPING, Markup.ML_TYPING, Markup.PATH, Markup.URL) ++
   414       tooltips.keys
   415 
   416   private def pretty_typing(kind: String, body: XML.Body): XML.Tree =
   417     Pretty.block(XML.Text(kind) :: Pretty.Break(1) :: body)
   418 
   419   private val timing_threshold: Double = options.real("jedit_timing_threshold")
   420 
   421   def tooltip(range: Text.Range): Option[Text.Info[XML.Body]] =
   422   {
   423     def add(prev: Text.Info[(Timing, List[(Boolean, XML.Tree)])],
   424       r0: Text.Range, p: (Boolean, XML.Tree)): Text.Info[(Timing, List[(Boolean, XML.Tree)])] =
   425     {
   426       val r = snapshot.convert(r0)
   427       val (t, info) = prev.info
   428       if (prev.range == r) Text.Info(r, (t, p :: info)) else Text.Info(r, (t, List(p)))
   429     }
   430 
   431     val results =
   432       snapshot.cumulate_markup[Text.Info[(Timing, List[(Boolean, XML.Tree)])]](
   433         range, Text.Info(range, (Timing.zero, Nil)), tooltip_elements, _ =>
   434         {
   435           case (Text.Info(r, (t1, info)), Text.Info(_, XML.Elem(Markup.Timing(t2), _))) =>
   436             Some(Text.Info(r, (t1 + t2, info)))
   437           case (prev, Text.Info(r, XML.Elem(Markup.Entity(kind, name), _))) =>
   438             val kind1 = space_explode('_', kind).mkString(" ")
   439             val txt1 = kind1 + " " + quote(name)
   440             val t = prev.info._1
   441             val txt2 =
   442               if (kind == Markup.COMMAND && t.elapsed.seconds >= timing_threshold)
   443                 "\n" + t.message
   444               else ""
   445             Some(add(prev, r, (true, XML.Text(txt1 + txt2))))
   446           case (prev, Text.Info(r, XML.Elem(Markup.Path(name), _)))
   447           if Path.is_ok(name) =>
   448             val jedit_file = PIDE.thy_load.append(snapshot.node_name.master_dir, Path.explode(name))
   449             Some(add(prev, r, (true, XML.Text("file " + quote(jedit_file)))))
   450           case (prev, Text.Info(r, XML.Elem(Markup.Url(name), _))) =>
   451             Some(add(prev, r, (true, XML.Text("URL " + quote(name)))))
   452           case (prev, Text.Info(r, XML.Elem(Markup(name, _), body)))
   453           if name == Markup.SORTING || name == Markup.TYPING =>
   454             Some(add(prev, r, (true, pretty_typing("::", body))))
   455           case (prev, Text.Info(r, XML.Elem(Markup(Markup.ML_TYPING, _), body))) =>
   456             Some(add(prev, r, (false, pretty_typing("ML:", body))))
   457           case (prev, Text.Info(r, XML.Elem(Markup.Language(language, _), _))) =>
   458             Some(add(prev, r, (true, XML.Text("language: " + language))))
   459           case (prev, Text.Info(r, XML.Elem(Markup(name, _), _))) =>
   460             if (tooltips.isDefinedAt(name))
   461               Some(add(prev, r, (true, XML.Text(tooltips(name)))))
   462             else None
   463         }).map(_.info)
   464 
   465     results.map(_.info).flatMap(_._2) match {
   466       case Nil => None
   467       case tips =>
   468         val r = Text.Range(results.head.range.start, results.last.range.stop)
   469         val all_tips = (tips.filter(_._1) ++ tips.filter(!_._1).lastOption.toList).map(_._2)
   470         Some(Text.Info(r, Library.separate(Pretty.FBreak, all_tips)))
   471     }
   472   }
   473 
   474   val tooltip_margin: Int = options.int("jedit_tooltip_margin")
   475 
   476   lazy val tooltip_close_icon = JEdit_Lib.load_icon(options.string("tooltip_close_icon"))
   477   lazy val tooltip_detach_icon = JEdit_Lib.load_icon(options.string("tooltip_detach_icon"))
   478 
   479 
   480   private lazy val gutter_icons = Map(
   481     Rendering.information_pri -> JEdit_Lib.load_icon(options.string("gutter_information_icon")),
   482     Rendering.warning_pri -> JEdit_Lib.load_icon(options.string("gutter_warning_icon")),
   483     Rendering.legacy_pri -> JEdit_Lib.load_icon(options.string("gutter_legacy_icon")),
   484     Rendering.error_pri -> JEdit_Lib.load_icon(options.string("gutter_error_icon")))
   485 
   486   private val gutter_elements =
   487     Set(Markup.WRITELN, Markup.WARNING, Markup.ERROR)
   488 
   489   def gutter_message(range: Text.Range): Option[Icon] =
   490   {
   491     val results =
   492       snapshot.cumulate_markup[Int](range, 0, gutter_elements, _ =>
   493         {
   494           case (pri, Text.Info(_, XML.Elem(Markup(Markup.WRITELN, _),
   495               List(XML.Elem(Markup(Markup.INFORMATION, _), _))))) =>
   496             Some(pri max Rendering.information_pri)
   497           case (pri, Text.Info(_, XML.Elem(Markup(Markup.WARNING, _), body))) =>
   498             body match {
   499               case List(XML.Elem(Markup(Markup.LEGACY, _), _)) =>
   500                 Some(pri max Rendering.legacy_pri)
   501               case _ =>
   502                 Some(pri max Rendering.warning_pri)
   503             }
   504           case (pri, Text.Info(_, XML.Elem(Markup(Markup.ERROR, _), _))) =>
   505             Some(pri max Rendering.error_pri)
   506           case _ => None
   507         })
   508     val pri = (0 /: results) { case (p1, Text.Info(_, p2)) => p1 max p2 }
   509     gutter_icons.get(pri)
   510   }
   511 
   512 
   513   private val squiggly_colors = Map(
   514     Rendering.writeln_pri -> writeln_color,
   515     Rendering.information_pri -> information_color,
   516     Rendering.warning_pri -> warning_color,
   517     Rendering.error_pri -> error_color)
   518 
   519   private val squiggly_elements = Set(Markup.WRITELN, Markup.WARNING, Markup.ERROR)
   520 
   521   def squiggly_underline(range: Text.Range): List[Text.Info[Color]] =
   522   {
   523     val results =
   524       snapshot.cumulate_markup[Int](range, 0, squiggly_elements, _ =>
   525         {
   526           case (pri, Text.Info(_, elem)) =>
   527             if (Protocol.is_information(elem))
   528               Some(pri max Rendering.information_pri)
   529             else
   530               Some(pri max Rendering.message_pri(elem.name))
   531         })
   532     for {
   533       Text.Info(r, pri) <- results
   534       color <- squiggly_colors.get(pri)
   535     } yield Text.Info(r, color)
   536   }
   537 
   538 
   539   private val message_colors = Map(
   540     Rendering.writeln_pri -> writeln_message_color,
   541     Rendering.information_pri -> information_message_color,
   542     Rendering.tracing_pri -> tracing_message_color,
   543     Rendering.warning_pri -> warning_message_color,
   544     Rendering.error_pri -> error_message_color)
   545 
   546   private val line_background_elements =
   547     Set(Markup.WRITELN_MESSAGE, Markup.TRACING_MESSAGE, Markup.WARNING_MESSAGE,
   548       Markup.ERROR_MESSAGE, Markup.INFORMATION)
   549 
   550   def line_background(range: Text.Range): Option[(Color, Boolean)] =
   551   {
   552     val results =
   553       snapshot.cumulate_markup[Int](range, 0, line_background_elements, _ =>
   554         {
   555           case (pri, Text.Info(_, elem)) =>
   556             val name = elem.name
   557             if (name == Markup.INFORMATION)
   558               Some(pri max Rendering.information_pri)
   559             else if (name == Markup.WRITELN_MESSAGE || name == Markup.TRACING_MESSAGE ||
   560                 elem.name == Markup.WARNING_MESSAGE || name == Markup.ERROR_MESSAGE)
   561               Some(pri max Rendering.message_pri(name))
   562             else None
   563         })
   564     val pri = (0 /: results) { case (p1, Text.Info(_, p2)) => p1 max p2 }
   565 
   566     val is_separator = pri > 0 &&
   567       snapshot.cumulate_markup[Boolean](range, false, Set(Markup.SEPARATOR), _ =>
   568         {
   569           case (_, Text.Info(_, elem)) =>
   570             if (elem.name == Markup.SEPARATOR) Some(true) else None
   571         }).exists(_.info)
   572 
   573     message_colors.get(pri).map((_, is_separator))
   574   }
   575 
   576 
   577   def output_messages(st: Command.State): List[XML.Tree] =
   578     st.results.entries.map(_._2).filterNot(Protocol.is_result(_)).toList
   579 
   580 
   581   private val background1_elements =
   582     Protocol.command_status_markup + Markup.WRITELN_MESSAGE + Markup.TRACING_MESSAGE +
   583       Markup.WARNING_MESSAGE + Markup.ERROR_MESSAGE + Markup.BAD + Markup.INTENSIFY ++
   584       active_elements
   585 
   586   def background1(range: Text.Range): List[Text.Info[Color]] =
   587   {
   588     if (snapshot.is_outdated) List(Text.Info(range, outdated_color))
   589     else
   590       for {
   591         Text.Info(r, result) <-
   592           snapshot.cumulate_markup[(Option[Protocol.Status], Option[Color])](
   593             range, (Some(Protocol.Status.init), None), background1_elements, command_state =>
   594             {
   595               case (((Some(status), color), Text.Info(_, XML.Elem(markup, _))))
   596               if (Protocol.command_status_markup(markup.name)) =>
   597                 Some((Some(Protocol.command_status(status, markup)), color))
   598               case (_, Text.Info(_, XML.Elem(Markup(Markup.BAD, _), _))) =>
   599                 Some((None, Some(bad_color)))
   600               case (_, Text.Info(_, XML.Elem(Markup(Markup.INTENSIFY, _), _))) =>
   601                 Some((None, Some(intensify_color)))
   602               case (acc, Text.Info(_, Protocol.Dialog(_, serial, result))) =>
   603                 command_state.results.get(serial) match {
   604                   case Some(Protocol.Dialog_Result(res)) if res == result =>
   605                     Some((None, Some(active_result_color)))
   606                   case _ =>
   607                     Some((None, Some(active_color)))
   608                 }
   609               case (_, Text.Info(_, elem)) =>
   610                 if (active_elements(elem.name)) Some((None, Some(active_color)))
   611                 else None
   612             })
   613         color <-
   614           (result match {
   615             case (Some(status), opt_color) =>
   616               if (status.is_unprocessed) Some(unprocessed1_color)
   617               else if (status.is_running) Some(running1_color)
   618               else opt_color
   619             case (_, opt_color) => opt_color
   620           })
   621       } yield Text.Info(r, color)
   622   }
   623 
   624 
   625   def background2(range: Text.Range): List[Text.Info[Color]] =
   626     snapshot.select_markup(range, Set(Markup.TOKEN_RANGE), _ =>
   627       {
   628         case Text.Info(_, elem) =>
   629           if (elem.name == Markup.TOKEN_RANGE) Some(light_color) else None
   630       })
   631 
   632 
   633   def bullet(range: Text.Range): List[Text.Info[Color]] =
   634     snapshot.select_markup(range, Set(Markup.BULLET), _ =>
   635       {
   636         case Text.Info(_, elem) =>
   637           if (elem.name == Markup.BULLET) Some(bullet_color) else None
   638       })
   639 
   640 
   641   private val foreground_elements =
   642     Set(Markup.STRING, Markup.ALTSTRING, Markup.VERBATIM, Markup.CARTOUCHE, Markup.ANTIQUOTED)
   643 
   644   def foreground(range: Text.Range): List[Text.Info[Color]] =
   645     snapshot.select_markup(range, foreground_elements, _ =>
   646       {
   647         case Text.Info(_, elem) =>
   648           if (elem.name == Markup.ANTIQUOTED) Some(antiquoted_color) else Some(quoted_color)
   649       })
   650 
   651 
   652   private val text_colors: Map[String, Color] = Map(
   653       Markup.KEYWORD1 -> keyword1_color,
   654       Markup.KEYWORD2 -> keyword2_color,
   655       Markup.STRING -> Color.BLACK,
   656       Markup.ALTSTRING -> Color.BLACK,
   657       Markup.VERBATIM -> Color.BLACK,
   658       Markup.CARTOUCHE -> Color.BLACK,
   659       Markup.LITERAL -> keyword1_color,
   660       Markup.DELIMITER -> Color.BLACK,
   661       Markup.TFREE -> tfree_color,
   662       Markup.TVAR -> tvar_color,
   663       Markup.FREE -> free_color,
   664       Markup.SKOLEM -> skolem_color,
   665       Markup.BOUND -> bound_color,
   666       Markup.VAR -> var_color,
   667       Markup.INNER_STRING -> inner_quoted_color,
   668       Markup.INNER_CARTOUCHE -> inner_cartouche_color,
   669       Markup.INNER_COMMENT -> inner_comment_color,
   670       Markup.DYNAMIC_FACT -> dynamic_color,
   671       Markup.ANTIQUOTE -> antiquote_color,
   672       Markup.ML_KEYWORD1 -> keyword1_color,
   673       Markup.ML_KEYWORD2 -> keyword2_color,
   674       Markup.ML_KEYWORD3 -> keyword3_color,
   675       Markup.ML_DELIMITER -> Color.BLACK,
   676       Markup.ML_NUMERAL -> inner_numeral_color,
   677       Markup.ML_CHAR -> inner_quoted_color,
   678       Markup.ML_STRING -> inner_quoted_color,
   679       Markup.ML_COMMENT -> inner_comment_color)
   680 
   681   private val text_color_elements = text_colors.keySet
   682 
   683   def text_color(range: Text.Range, color: Color): List[Text.Info[Color]] =
   684   {
   685     if (color == Token_Markup.hidden_color) List(Text.Info(range, color))
   686     else
   687       snapshot.cumulate_markup(range, color, text_color_elements, _ =>
   688         {
   689           case (_, Text.Info(_, elem)) => text_colors.get(elem.name)
   690         })
   691   }
   692 
   693 
   694   /* nested text structure -- folds */
   695 
   696   private val fold_depth_elements =
   697     Set(Markup.TEXT_FOLD, Markup.GOAL, Markup.SUBGOAL)
   698 
   699   def fold_depth(range: Text.Range): List[Text.Info[Int]] =
   700     snapshot.cumulate_markup[Int](range, 0, fold_depth_elements, _ =>
   701       {
   702         case (depth, _) => Some(depth + 1)
   703       })
   704 }