propagate keys to enclosing view like org.gjt.sp.jedit.gui.CompletionPopup, but without its KeyEventInterceptor;
/*  Title:      Pure/PIDE/markup.scala
    Module:     PIDE
    Author:     Makarius
Isabelle-specific implementation of quasi-abstract markup elements.
*/
package isabelle
object Markup
{
  /* properties */
  val NAME = "name"
  val Name = new Properties.String(NAME)
  val KIND = "kind"
  val Kind = new Properties.String(KIND)
  /* basic markup */
  val Empty = Markup("", Nil)
  val Broken = Markup("broken", Nil)
  /* formal entities */
  val BINDING = "binding"
  val ENTITY = "entity"
  val DEF = "def"
  val REF = "ref"
  object Entity
  {
    def unapply(markup: Markup): Option[(String, String)] =
      markup match {
        case Markup(ENTITY, props @ Kind(kind)) =>
          props match {
            case Name(name) => Some(kind, name)
            case _ => None
          }
        case _ => None
      }
  }
  /* position */
  val LINE = "line"
  val OFFSET = "offset"
  val END_OFFSET = "end_offset"
  val FILE = "file"
  val ID = "id"
  val DEF_LINE = "def_line"
  val DEF_OFFSET = "def_offset"
  val DEF_END_OFFSET = "def_end_offset"
  val DEF_FILE = "def_file"
  val DEF_ID = "def_id"
  val POSITION_PROPERTIES = Set(LINE, OFFSET, END_OFFSET, FILE, ID)
  val POSITION = "position"
  /* path */
  val PATH = "path"
  object Path
  {
    def unapply(markup: Markup): Option[String] =
      markup match {
        case Markup(PATH, Name(name)) => Some(name)
        case _ => None
      }
  }
  /* pretty printing */
  val Indent = new Properties.Int("indent")
  val BLOCK = "block"
  val Width = new Properties.Int("width")
  val BREAK = "break"
  val SEPARATOR = "separator"
  /* hidden text */
  val HIDDEN = "hidden"
  /* logical entities */
  val CLASS = "class"
  val TYPE_NAME = "type_name"
  val FIXED = "fixed"
  val CONSTANT = "constant"
  val DYNAMIC_FACT = "dynamic_fact"
  /* inner syntax */
  val TFREE = "tfree"
  val TVAR = "tvar"
  val FREE = "free"
  val SKOLEM = "skolem"
  val BOUND = "bound"
  val VAR = "var"
  val NUMERAL = "numeral"
  val LITERAL = "literal"
  val DELIMITER = "delimiter"
  val INNER_STRING = "inner_string"
  val INNER_COMMENT = "inner_comment"
  val TOKEN_RANGE = "token_range"
  val SORT = "sort"
  val TYP = "typ"
  val TERM = "term"
  val PROP = "prop"
  val SORTING = "sorting"
  val TYPING = "typing"
  val ATTRIBUTE = "attribute"
  val METHOD = "method"
  /* embedded source text */
  val ML_SOURCE = "ML_source"
  val DOCUMENT_SOURCE = "document_source"
  val ANTIQ = "antiq"
  val ML_ANTIQUOTATION = "ML_antiquotation"
  val DOCUMENT_ANTIQUOTATION = "document_antiquotation"
  val DOCUMENT_ANTIQUOTATION_OPTION = "document_antiquotation_option"
  /* text structure */
  val PARAGRAPH = "paragraph"
  val TEXT_FOLD = "text_fold"
  /* ML syntax */
  val ML_KEYWORD = "ML_keyword"
  val ML_DELIMITER = "ML_delimiter"
  val ML_TVAR = "ML_tvar"
  val ML_NUMERAL = "ML_numeral"
  val ML_CHAR = "ML_char"
  val ML_STRING = "ML_string"
  val ML_COMMENT = "ML_comment"
  val ML_DEF = "ML_def"
  val ML_OPEN = "ML_open"
  val ML_STRUCT = "ML_struct"
  val ML_TYPING = "ML_typing"
  /* outer syntax */
  val KEYWORD = "keyword"
  val OPERATOR = "operator"
  val COMMAND = "command"
  val STRING = "string"
  val ALTSTRING = "altstring"
  val VERBATIM = "verbatim"
  val COMMENT = "comment"
  val CONTROL = "control"
  val KEYWORD1 = "keyword1"
  val KEYWORD2 = "keyword2"
  /* timing */
  val TIMING = "timing"
  val ELAPSED = "elapsed"
  val CPU = "cpu"
  val GC = "gc"
  object Timing
  {
    def apply(timing: isabelle.Timing): Markup =
      Markup(TIMING, List(
        (ELAPSED, Properties.Value.Double(timing.elapsed.seconds)),
        (CPU, Properties.Value.Double(timing.cpu.seconds)),
        (GC, Properties.Value.Double(timing.gc.seconds))))
    def unapply(markup: Markup): Option[isabelle.Timing] =
      markup match {
        case Markup(TIMING, List(
          (ELAPSED, Properties.Value.Double(elapsed)),
          (CPU, Properties.Value.Double(cpu)),
          (GC, Properties.Value.Double(gc)))) =>
            Some(new isabelle.Timing(Time.seconds(elapsed), Time.seconds(cpu), Time.seconds(gc)))
        case _ => None
      }
  }
  /* toplevel */
  val SUBGOALS = "subgoals"
  val PROOF_STATE = "proof_state"
  val STATE = "state"
  val GOAL = "goal"
  val SUBGOAL = "subgoal"
  /* command status */
  val TASK = "task"
  val ACCEPTED = "accepted"
  val FORKED = "forked"
  val JOINED = "joined"
  val RUNNING = "running"
  val FINISHED = "finished"
  val FAILED = "failed"
  /* interactive documents */
  val VERSION = "version"
  val ASSIGN = "assign"
  /* prover process */
  val PROVER_COMMAND = "prover_command"
  val PROVER_ARG = "prover_arg"
  /* messages */
  val Serial = new Properties.Long("serial")
  val MESSAGE = "message"
  val INIT = "init"
  val STATUS = "status"
  val REPORT = "report"
  val RESULT = "result"
  val WRITELN = "writeln"
  val TRACING = "tracing"
  val WARNING = "warning"
  val ERROR = "error"
  val PROTOCOL = "protocol"
  val SYSTEM = "system"
  val STDOUT = "stdout"
  val STDERR = "stderr"
  val EXIT = "exit"
  val WRITELN_MESSAGE = "writeln_message"
  val TRACING_MESSAGE = "tracing_message"
  val WARNING_MESSAGE = "warning_message"
  val ERROR_MESSAGE = "error_message"
  val message: String => String =
    Map(WRITELN -> WRITELN_MESSAGE, TRACING -> TRACING_MESSAGE,
        WARNING -> WARNING_MESSAGE, ERROR -> ERROR_MESSAGE).withDefault((s: String) => s)
  val Return_Code = new Properties.Int("return_code")
  val LEGACY = "legacy"
  val NO_REPORT = "no_report"
  val BAD = "bad"
  val INTENSIFY = "intensify"
  /* active areas */
  val BROWSER = "browser"
  val GRAPHVIEW = "graphview"
  val SENDBACK = "sendback"
  val PADDING = "padding"
  val PADDING_LINE = (PADDING, LINE)
  val DIALOG = "dialog"
  val Result = new Properties.String(RESULT)
  /* protocol message functions */
  val FUNCTION = "function"
  val Function = new Properties.String(FUNCTION)
  val Assign_Execs: Properties.T = List((FUNCTION, "assign_execs"))
  val Removed_Versions: Properties.T = List((FUNCTION, "removed_versions"))
  object Invoke_Scala
  {
    def unapply(props: Properties.T): Option[(String, String)] =
      props match {
        case List((FUNCTION, "invoke_scala"), (NAME, name), (ID, id)) => Some((name, id))
        case _ => None
      }
  }
  object Cancel_Scala
  {
    def unapply(props: Properties.T): Option[String] =
      props match {
        case List((FUNCTION, "cancel_scala"), (ID, id)) => Some(id)
        case _ => None
      }
  }
  object ML_Statistics
  {
    def unapply(props: Properties.T): Option[Properties.T] =
      props match {
        case (FUNCTION, "ML_statistics") :: stats => Some(stats)
        case _ => None
      }
  }
}
sealed case class Markup(name: String, properties: Properties.T)