src/Tools/jEdit/src/jedit/isabelle_hyperlinks.scala
author wenzelm
Sat Aug 28 20:24:41 2010 +0200 (2010-08-28)
changeset 38843 d95522496593
parent 38722 ba31936497c2
child 38845 a9e37daf5bd0
permissions -rw-r--r--
more careful locking of jEdit buffer;
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/*  Title:      Tools/jEdit/src/jedit/isabelle_hyperlinks.scala
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    Author:     Fabian Immler, TU Munich
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Hyperlink setup for Isabelle proof documents.
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*/
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package isabelle.jedit
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import isabelle._
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import java.io.File
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import gatchan.jedit.hyperlinks.{Hyperlink, HyperlinkSource, AbstractHyperlink}
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import org.gjt.sp.jedit.{View, jEdit, Buffer, TextUtilities}
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private class Internal_Hyperlink(start: Int, end: Int, line: Int, ref_offset: Int)
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  extends AbstractHyperlink(start, end, line, "")
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{
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  override def click(view: View) {
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    view.getTextArea.moveCaretPosition(ref_offset)
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  }
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}
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class External_Hyperlink(start: Int, end: Int, line: Int, ref_file: String, ref_line: Int)
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  extends AbstractHyperlink(start, end, line, "")
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{
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  override def click(view: View) = {
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    Isabelle.system.source_file(ref_file) match {
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      case None => System.err.println("Could not find source file " + ref_file)  // FIXME ??
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      case Some(file) =>
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        jEdit.openFiles(view, file.getParent, Array(file.getName, "+line:" + ref_line))
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    }
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  }
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}
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class Isabelle_Hyperlinks extends HyperlinkSource
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{
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  def getHyperlink(buffer: Buffer, buffer_offset: Int): Hyperlink =
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  {
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    Swing_Thread.assert()
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    Isabelle.buffer_lock(buffer) {
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      Document_Model(buffer) match {
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        case Some(model) =>
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          val snapshot = model.snapshot()
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          val offset = snapshot.revert(buffer_offset)
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          snapshot.node.command_at(offset) match {
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            case Some((command, command_start)) =>
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              // FIXME Isar_Document.Hyperlink extractor
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              (snapshot.state(command).markup.select(Text.Range(offset, offset + 1) - command_start) {
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                case Text.Info(info_range, XML.Elem(Markup(Markup.ML_REF, _),
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                    List(XML.Elem(Markup(Markup.ML_DEF, props), _)))) =>
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                  val Text.Range(begin, end) = snapshot.convert(info_range + command_start)
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                  val line = buffer.getLineOfOffset(begin)
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                  (Position.File.unapply(props), Position.Line.unapply(props)) match {
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                    case (Some(ref_file), Some(ref_line)) =>
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                      new External_Hyperlink(begin, end, line, ref_file, ref_line)
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                    case _ =>
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                      (Position.Id.unapply(props), Position.Offset.unapply(props)) match {
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                        case (Some(ref_id), Some(ref_offset)) =>
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                          snapshot.lookup_command(ref_id) match {
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                            case Some(ref_cmd) =>
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                              snapshot.node.command_start(ref_cmd) match {
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                                case Some(ref_cmd_start) =>
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                                  new Internal_Hyperlink(begin, end, line,
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                                    snapshot.convert(ref_cmd_start + ref_cmd.decode(ref_offset)))
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                                case None => null
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                              }
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                            case None => null
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                          }
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                        case _ => null
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                      }
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                  }
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              } { null }).head.info
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            case None => null
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          }
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        case None => null
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      }
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    }
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  }
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}