wenzelm@43414: /*  Title:      Tools/jEdit/src/token_markup.scala
wenzelm@43414:     Author:     Makarius
wenzelm@43414: 
wenzelm@43414: Outer syntax token markup.
wenzelm@43414: */
wenzelm@43414: 
wenzelm@43414: package isabelle.jedit
wenzelm@43414: 
wenzelm@43414: 
wenzelm@43414: import isabelle._
wenzelm@43414: 
wenzelm@43414: import org.gjt.sp.jedit.Buffer
wenzelm@43414: import org.gjt.sp.jedit.syntax.{Token => JToken, TokenMarker, TokenHandler, ParserRuleSet}
wenzelm@43414: import javax.swing.text.Segment
wenzelm@43414: 
wenzelm@43414: 
wenzelm@43414: object Token_Markup
wenzelm@43414: {
wenzelm@43414:   /* extended jEdit syntax styles */
wenzelm@43414: 
wenzelm@43414:   private val plain_range: Int = JToken.ID_COUNT
wenzelm@43414:   private def check_range(i: Int) { require(0 <= i && i < plain_range) }
wenzelm@43414: 
wenzelm@43414:   def subscript(i: Byte): Byte = { check_range(i); (i + plain_range).toByte }
wenzelm@43414:   def superscript(i: Byte): Byte = { check_range(i); (i + 2 * plain_range).toByte }
wenzelm@43414:   val hidden: Byte = (3 * plain_range).toByte
wenzelm@43414: 
wenzelm@43414: 
wenzelm@43414:   /* token marker */
wenzelm@43414: 
wenzelm@43414:   private val isabelle_rules = new ParserRuleSet("isabelle", "MAIN")
wenzelm@43414: 
wenzelm@43429:   private class Line_Context(val context: Scan.Context)
wenzelm@43429:     extends TokenMarker.LineContext(isabelle_rules, null)
wenzelm@43414:   {
wenzelm@43414:     override def hashCode: Int = context.hashCode
wenzelm@43414:     override def equals(that: Any): Boolean =
wenzelm@43414:       that match {
wenzelm@43414:         case other: Line_Context => context == other.context
wenzelm@43414:         case _ => false
wenzelm@43414:       }
wenzelm@43414:   }
wenzelm@43414: 
wenzelm@43414:   def token_marker(session: Session, buffer: Buffer): TokenMarker =
wenzelm@43414:     new TokenMarker {
wenzelm@43429:       override def markTokens(context: TokenMarker.LineContext,
wenzelm@43414:           handler: TokenHandler, line: Segment): TokenMarker.LineContext =
wenzelm@43414:       {
wenzelm@43416:         val syntax = session.current_syntax()
wenzelm@43429:         val ctxt =
wenzelm@43429:           context match {
wenzelm@43429:             case c: Line_Context => c.context
wenzelm@43429:             case _ => Scan.Finished
wenzelm@43429:           }
wenzelm@43416:         val (tokens, ctxt1) = syntax.scan_context(line, ctxt)
wenzelm@43429:         val context1 = new Line_Context(ctxt1)
wenzelm@43414: 
wenzelm@43416:         var offset = 0
wenzelm@43416:         for (token <- tokens) {
wenzelm@43416:           val style = Isabelle_Markup.token_markup(syntax, token)
wenzelm@43416:           val length = token.source.length
wenzelm@43416:           handler.handleToken(line, style, offset, length, context1)
wenzelm@43416:           offset += length
wenzelm@43414:         }
wenzelm@43416:         handler.handleToken(line, JToken.END, line.count, 0, context1)
wenzelm@43416: 
wenzelm@43416:         val context2 = context1.intern
wenzelm@43416:         handler.setLineContext(context2)
wenzelm@43416:         context2
wenzelm@43414:       }
wenzelm@43414:     }
wenzelm@43414: }
wenzelm@43414: