src/Tools/jEdit/src/jedit/isabelle_hyperlinks.scala
author wenzelm
Tue Sep 07 22:28:58 2010 +0200 (2010-09-07)
changeset 39177 0468964aec11
parent 38853 f593754b0772
child 42327 7c7cc7590eb3
permissions -rw-r--r--
simplified Markup_Tree.select: Stream instead of Iterator (again), explicit Option instead of default;
tuned Snapshot.convert/revert;
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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 =>
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        Library.error_dialog(view, "File not found", "Could not find source file " + ref_file)
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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 markup =
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            snapshot.select_markup(Text.Range(buffer_offset, buffer_offset + 1)) {
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              // FIXME Isar_Document.Hyperlink extractor
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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) = info_range
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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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                    (props, props) match {
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                      case (Position.Id(ref_id), Position.Offset(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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            }
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          markup match {
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            case Text.Info(_, Some(link)) #:: _ => link
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            case _ => 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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}