clarified modules: spell-checker in Pure;
authorwenzelm
Tue, 07 Mar 2017 14:33:14 +0100
changeset 65139 0a2c0712e432
parent 65138 64dfee6bd243
child 65140 1191df79aa1c
clarified modules: spell-checker in Pure;
src/Pure/PIDE/rendering.scala
src/Pure/Tools/spell_checker.scala
src/Pure/build-jars
src/Tools/jEdit/lib/Tools/jedit
src/Tools/jEdit/src/completion_popup.scala
src/Tools/jEdit/src/context_menu.scala
src/Tools/jEdit/src/isabelle.scala
src/Tools/jEdit/src/isabelle_options.scala
src/Tools/jEdit/src/jedit_rendering.scala
src/Tools/jEdit/src/jedit_spell_checker.scala
src/Tools/jEdit/src/spell_checker.scala
--- a/src/Pure/PIDE/rendering.scala	Tue Mar 07 13:55:49 2017 +0100
+++ b/src/Pure/PIDE/rendering.scala	Tue Mar 07 14:33:14 2017 +0100
@@ -169,6 +169,21 @@
     }
 
 
+  /* spell checker */
+
+  private lazy val spell_checker_elements =
+    Markup.Elements(space_explode(',', options.string("spell_checker_elements")): _*)
+
+  def spell_checker_ranges(range: Text.Range): List[Text.Range] =
+    snapshot.select(range, spell_checker_elements, _ => _ => Some(())).map(_.range)
+
+  def spell_checker_point(range: Text.Range): Option[Text.Range] =
+    snapshot.select(range, spell_checker_elements, _ =>
+      {
+        case info => Some(snapshot.convert(info.range))
+      }).headOption.map(_.info)
+
+
   /* tooltips */
 
   def timing_threshold: Double
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/src/Pure/Tools/spell_checker.scala	Tue Mar 07 14:33:14 2017 +0100
@@ -0,0 +1,272 @@
+/*  Title:      Tools/jEdit/src/spell_checker.scala
+    Author:     Makarius
+
+Spell checker with completion, based on JOrtho (see
+http://sourceforge.net/projects/jortho).
+*/
+
+package isabelle
+
+
+import java.lang.Class
+
+import scala.collection.mutable
+import scala.annotation.tailrec
+import scala.collection.immutable.SortedMap
+
+
+object Spell_Checker
+{
+  /* words within text */
+
+  def marked_words(base: Text.Offset, text: String, mark: Text.Info[String] => Boolean)
+    : List[Text.Info[String]] =
+  {
+    val result = new mutable.ListBuffer[Text.Info[String]]
+    var offset = 0
+
+    def apostrophe(c: Int): Boolean =
+      c == '\'' && (offset + 1 == text.length || text(offset + 1) != '\'')
+
+    @tailrec def scan(pred: Int => Boolean)
+    {
+      if (offset < text.length) {
+        val c = text.codePointAt(offset)
+        if (pred(c)) {
+          offset += Character.charCount(c)
+          scan(pred)
+        }
+      }
+    }
+
+    while (offset < text.length) {
+      scan(c => !Character.isLetter(c))
+      val start = offset
+      scan(c => Character.isLetterOrDigit(c) || apostrophe(c))
+      val stop = offset
+      if (stop - start >= 2) {
+        val info = Text.Info(Text.Range(base + start, base + stop), text.substring(start, stop))
+        if (mark(info)) result += info
+      }
+    }
+    result.toList
+  }
+
+
+  /* dictionaries */
+
+  class Dictionary private[Spell_Checker](val path: Path)
+  {
+    val lang = path.split_ext._1.base.implode
+    val user_path = Path.explode("$ISABELLE_HOME_USER/dictionaries") + Path.basic(lang)
+    override def toString: String = lang
+  }
+
+  private object Decl
+  {
+    def apply(name: String, include: Boolean): String =
+      if (include) name else "-" + name
+
+    def unapply(decl: String): Option[(String, Boolean)] =
+    {
+      val decl1 = decl.trim
+      if (decl1 == "" || decl1.startsWith("#")) None
+      else
+        Library.try_unprefix("-", decl1.trim) match {
+          case None => Some((decl1, true))
+          case Some(decl2) => Some((decl2, false))
+        }
+    }
+  }
+
+  def dictionaries(): List[Dictionary] =
+    for {
+      path <- Path.split(Isabelle_System.getenv("JORTHO_DICTIONARIES"))
+      if path.is_file
+    } yield new Dictionary(path)
+
+
+  /* create spell checker */
+
+  def apply(dictionary: Dictionary): Spell_Checker = new Spell_Checker(dictionary)
+
+  private sealed case class Update(include: Boolean, permanent: Boolean)
+}
+
+
+class Spell_Checker private(dictionary: Spell_Checker.Dictionary)
+{
+  override def toString: String = dictionary.toString
+
+
+  /* main dictionary content */
+
+  private var dict = new Object
+  private var updates = SortedMap.empty[String, Spell_Checker.Update]
+
+  private def included_iterator(): Iterator[String] =
+    for {
+      (word, upd) <- updates.iterator
+      if upd.include
+    } yield word
+
+  private def excluded(word: String): Boolean =
+    updates.get(word) match {
+      case Some(upd) => !upd.include
+      case None => false
+    }
+
+  private def load()
+  {
+    val main_dictionary = split_lines(File.read_gzip(dictionary.path))
+
+    val permanent_updates =
+      if (dictionary.user_path.is_file)
+        for {
+          Spell_Checker.Decl(word, include) <- split_lines(File.read(dictionary.user_path))
+        } yield (word, Spell_Checker.Update(include, true))
+      else Nil
+
+    updates =
+      updates -- (for ((name, upd) <- updates.iterator; if upd.permanent) yield name) ++
+        permanent_updates
+
+    val factory_class = Class.forName("com.inet.jortho.DictionaryFactory")
+    val factory_cons = factory_class.getConstructor()
+    factory_cons.setAccessible(true)
+    val factory = factory_cons.newInstance()
+
+    val add = Untyped.method(factory_class, "add", classOf[String])
+
+    for {
+      word <- main_dictionary.iterator ++ included_iterator()
+      if !excluded(word)
+    } add.invoke(factory, word)
+
+    dict = Untyped.method(factory_class, "create").invoke(factory)
+  }
+  load()
+
+  private def save()
+  {
+    val permanent_decls =
+      (for {
+        (word, upd) <- updates.iterator
+        if upd.permanent
+      } yield Spell_Checker.Decl(word, upd.include)).toList
+
+    if (permanent_decls.nonEmpty || dictionary.user_path.is_file) {
+      val header = """# User updates for spell-checker dictionary
+#
+#   * each line contains at most one word
+#   * extra blanks are ignored
+#   * lines starting with "#" are stripped
+#   * lines starting with "-" indicate excluded words
+#
+#:mode=text:encoding=UTF-8:
+
+"""
+      Isabelle_System.mkdirs(dictionary.user_path.expand.dir)
+      File.write(dictionary.user_path, header + cat_lines(permanent_decls))
+    }
+  }
+
+  def update(word: String, include: Boolean, permanent: Boolean)
+  {
+    updates += (word -> Spell_Checker.Update(include, permanent))
+
+    if (include) {
+      if (permanent) save()
+      Untyped.method(dict.getClass, "add", classOf[String]).invoke(dict, word)
+    }
+    else { save(); load() }
+  }
+
+  def reset()
+  {
+    updates = SortedMap.empty
+    load()
+  }
+
+  def reset_enabled(): Int =
+    updates.valuesIterator.filter(upd => !upd.permanent).length
+
+
+  /* check known words */
+
+  def contains(word: String): Boolean =
+    Untyped.method(dict.getClass.getSuperclass, "exist", classOf[String]).
+      invoke(dict, word).asInstanceOf[java.lang.Boolean].booleanValue
+
+  def check(word: String): Boolean =
+    word match {
+      case Word.Case(c) if c != Word.Lowercase =>
+        contains(word) || contains(Word.lowercase(word))
+      case _ =>
+        contains(word)
+    }
+
+  def marked_words(base: Text.Offset, text: String): List[Text.Info[String]] =
+    Spell_Checker.marked_words(base, text, info => !check(info.info))
+
+
+  /* suggestions for unknown words */
+
+  private def suggestions(word: String): Option[List[String]] =
+  {
+    val res =
+      Untyped.method(dict.getClass.getSuperclass, "searchSuggestions", classOf[String]).
+        invoke(dict, word).asInstanceOf[java.util.List[AnyRef]].toArray.toList.map(_.toString)
+    if (res.isEmpty) None else Some(res)
+  }
+
+  def complete(word: String): List[String] =
+    if (check(word)) Nil
+    else {
+      val word_case = Word.Case.unapply(word)
+      def recover_case(s: String) =
+        word_case match {
+          case Some(c) => Word.Case(c, s)
+          case None => s
+        }
+      val result =
+        word_case match {
+          case Some(c) if c != Word.Lowercase =>
+            suggestions(word) orElse suggestions(Word.lowercase(word))
+          case _ =>
+            suggestions(word)
+        }
+      result.getOrElse(Nil).map(recover_case)
+    }
+
+  def complete_enabled(word: String): Boolean = complete(word).nonEmpty
+}
+
+
+class Spell_Checker_Variable
+{
+  private val no_spell_checker: (String, Option[Spell_Checker]) = ("", None)
+  private var current_spell_checker = no_spell_checker
+
+  def get: Option[Spell_Checker] = synchronized { current_spell_checker._2 }
+
+  def update(options: Options): Unit = synchronized {
+    if (options.bool("spell_checker")) {
+      val lang = options.string("spell_checker_dictionary")
+      if (current_spell_checker._1 != lang) {
+        Spell_Checker.dictionaries.find(_.lang == lang) match {
+          case Some(dictionary) =>
+            val spell_checker =
+              Exn.capture { Spell_Checker(dictionary) } match {
+                case Exn.Res(spell_checker) => Some(spell_checker)
+                case Exn.Exn(_) => None
+              }
+            current_spell_checker = (lang, spell_checker)
+          case None =>
+            current_spell_checker = no_spell_checker
+        }
+      }
+    }
+    else current_spell_checker = no_spell_checker
+  }
+}
--- a/src/Pure/build-jars	Tue Mar 07 13:55:49 2017 +0100
+++ b/src/Pure/build-jars	Tue Mar 07 14:33:14 2017 +0100
@@ -139,6 +139,7 @@
   Tools/print_operation.scala
   Tools/profiling_report.scala
   Tools/simplifier_trace.scala
+  Tools/spell_checker.scala
   Tools/task_statistics.scala
   Tools/update_cartouches.scala
   Tools/update_header.scala
--- a/src/Tools/jEdit/lib/Tools/jedit	Tue Mar 07 13:55:49 2017 +0100
+++ b/src/Tools/jEdit/lib/Tools/jedit	Tue Mar 07 14:33:14 2017 +0100
@@ -43,6 +43,7 @@
   "src/jedit_rendering.scala"
   "src/jedit_resources.scala"
   "src/jedit_sessions.scala"
+  "src/jedit_spell_checker.scala"
   "src/keymap_merge.scala"
   "src/monitor_dockable.scala"
   "src/output_dockable.scala"
@@ -60,7 +61,6 @@
   "src/simplifier_trace_dockable.scala"
   "src/simplifier_trace_window.scala"
   "src/sledgehammer_dockable.scala"
-  "src/spell_checker.scala"
   "src/state_dockable.scala"
   "src/symbols_dockable.scala"
   "src/syslog_dockable.scala"
--- a/src/Tools/jEdit/src/completion_popup.scala	Tue Mar 07 13:55:49 2017 +0100
+++ b/src/Tools/jEdit/src/completion_popup.scala	Tue Mar 07 14:33:14 2017 +0100
@@ -381,7 +381,7 @@
               case Some(rendering) =>
                 Completion.Result.merge(history, result1,
                   Completion.Result.merge(history,
-                    Spell_Checker.completion(text_area, explicit, rendering),
+                    JEdit_Spell_Checker.completion(text_area, explicit, rendering),
                     Completion.Result.merge(history,
                       path_completion(rendering),
                       Bibtex_JEdit.completion(history, text_area, rendering))))
--- a/src/Tools/jEdit/src/context_menu.scala	Tue Mar 07 13:55:49 2017 +0100
+++ b/src/Tools/jEdit/src/context_menu.scala	Tue Mar 07 14:33:14 2017 +0100
@@ -29,7 +29,7 @@
         if (evt != null && evt.getSource == text_area.getPainter) {
           val offset = text_area.xyToOffset(evt.getX, evt.getY)
           if (offset >= 0)
-            Spell_Checker.context_menu(text_area, offset) :::
+            JEdit_Spell_Checker.context_menu(text_area, offset) :::
             Debugger_Dockable.context_menu(text_area, offset)
           else Nil
         }
--- a/src/Tools/jEdit/src/isabelle.scala	Tue Mar 07 13:55:49 2017 +0100
+++ b/src/Tools/jEdit/src/isabelle.scala	Tue Mar 07 14:33:14 2017 +0100
@@ -419,7 +419,7 @@
       doc_view <- Document_View.get(text_area)
       rendering = doc_view.get_rendering()
       range = JEdit_Lib.caret_range(text_area)
-      Text.Info(_, word) <- Spell_Checker.current_word(text_area, rendering, range)
+      Text.Info(_, word) <- JEdit_Spell_Checker.current_word(text_area, rendering, range)
     } {
       spell_checker.update(word, include, permanent)
       JEdit_Lib.jedit_views().foreach(_.repaint())
--- a/src/Tools/jEdit/src/isabelle_options.scala	Tue Mar 07 13:55:49 2017 +0100
+++ b/src/Tools/jEdit/src/isabelle_options.scala	Tue Mar 07 14:33:14 2017 +0100
@@ -42,7 +42,7 @@
   val options = PIDE.options
 
   private val predefined =
-    List(JEdit_Sessions.logic_selector(false), Spell_Checker.dictionaries_selector())
+    List(JEdit_Sessions.logic_selector(false), JEdit_Spell_Checker.dictionaries_selector())
 
   protected val components =
     options.make_components(predefined,
--- a/src/Tools/jEdit/src/jedit_rendering.scala	Tue Mar 07 13:55:49 2017 +0100
+++ b/src/Tools/jEdit/src/jedit_rendering.scala	Tue Mar 07 14:33:14 2017 +0100
@@ -251,21 +251,6 @@
       }).headOption.map(_.info)
 
 
-  /* spell checker */
-
-  private lazy val spell_checker_elements =
-    Markup.Elements(space_explode(',', options.string("spell_checker_elements")): _*)
-
-  def spell_checker_ranges(range: Text.Range): List[Text.Range] =
-    snapshot.select(range, spell_checker_elements, _ => _ => Some(())).map(_.range)
-
-  def spell_checker_point(range: Text.Range): Option[Text.Range] =
-    snapshot.select(range, spell_checker_elements, _ =>
-      {
-        case info => Some(snapshot.convert(info.range))
-      }).headOption.map(_.info)
-
-
   /* breakpoints */
 
   def breakpoint(range: Text.Range): Option[(Command, Long)] =
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/src/Tools/jEdit/src/jedit_spell_checker.scala	Tue Mar 07 14:33:14 2017 +0100
@@ -0,0 +1,129 @@
+/*  Title:      Tools/jEdit/src/jedit_spell_checker.scala
+    Author:     Makarius
+
+Specific spell-checker support for Isabelle/jEdit.
+*/
+
+package isabelle.jedit
+
+
+import isabelle._
+
+import javax.swing.JMenuItem
+import scala.swing.ComboBox
+
+import org.gjt.sp.jedit.menu.EnhancedMenuItem
+import org.gjt.sp.jedit.jEdit
+import org.gjt.sp.jedit.textarea.{JEditTextArea, TextArea}
+
+
+object JEdit_Spell_Checker
+{
+  /* words within text */
+
+  def current_word(text_area: TextArea, rendering: JEdit_Rendering, range: Text.Range)
+    : Option[Text.Info[String]] =
+  {
+    for {
+      spell_range <- rendering.spell_checker_point(range)
+      text <- JEdit_Lib.try_get_text(text_area.getBuffer, spell_range)
+      info <- Spell_Checker.marked_words(
+        spell_range.start, text, info => info.range.overlaps(range)).headOption
+    } yield info
+  }
+
+
+  /* completion */
+
+  def completion(text_area: TextArea, explicit: Boolean, rendering: JEdit_Rendering)
+      : Option[Completion.Result] =
+  {
+    for {
+      spell_checker <- PIDE.spell_checker.get
+      if explicit
+      range = JEdit_Lib.before_caret_range(text_area, rendering)
+      word <- current_word(text_area, rendering, range)
+      words = spell_checker.complete(word.info)
+      if words.nonEmpty
+      descr = "(from dictionary " + quote(spell_checker.toString) + ")"
+      items =
+        words.map(w => Completion.Item(word.range, word.info, "", List(w, descr), w, 0, false))
+    } yield Completion.Result(word.range, word.info, false, items)
+  }
+
+
+  /* context menu */
+
+  def context_menu(text_area: JEditTextArea, offset: Text.Offset): List[JMenuItem] =
+  {
+    val result =
+      for {
+        spell_checker <- PIDE.spell_checker.get
+        doc_view <- Document_View.get(text_area)
+        rendering = doc_view.get_rendering()
+        range = JEdit_Lib.point_range(text_area.getBuffer, offset)
+        Text.Info(_, word) <- current_word(text_area, rendering, range)
+      } yield (spell_checker, word)
+
+    result match {
+      case Some((spell_checker, word)) =>
+
+        val context = jEdit.getActionContext()
+        def item(name: String): JMenuItem =
+          new EnhancedMenuItem(context.getAction(name).getLabel, name, context)
+
+        val complete_items =
+          if (spell_checker.complete_enabled(word)) List(item("isabelle.complete-word"))
+          else Nil
+
+        val update_items =
+          if (spell_checker.check(word))
+            List(item("isabelle.exclude-word"), item("isabelle.exclude-word-permanently"))
+          else
+            List(item("isabelle.include-word"), item("isabelle.include-word-permanently"))
+
+        val reset_items =
+          spell_checker.reset_enabled() match {
+            case 0 => Nil
+            case n =>
+              val name = "isabelle.reset-words"
+              val label = context.getAction(name).getLabel
+              List(new EnhancedMenuItem(label + " (" + n + ")", name, context))
+          }
+
+        complete_items ::: update_items ::: reset_items
+
+      case None => Nil
+    }
+  }
+
+
+  /* dictionaries */
+
+  def dictionaries_selector(): Option_Component =
+  {
+    GUI_Thread.require {}
+
+    val option_name = "spell_checker_dictionary"
+    val opt = PIDE.options.value.check_name(option_name)
+
+    val entries = Spell_Checker.dictionaries()
+    val component = new ComboBox(entries) with Option_Component {
+      name = option_name
+      val title = opt.title()
+      def load: Unit =
+      {
+        val lang = PIDE.options.string(option_name)
+        entries.find(_.lang == lang) match {
+          case Some(entry) => selection.item = entry
+          case None =>
+        }
+      }
+      def save: Unit = PIDE.options.string(option_name) = selection.item.lang
+    }
+
+    component.load()
+    component.tooltip = GUI.tooltip_lines(opt.print_default)
+    component
+  }
+}
--- a/src/Tools/jEdit/src/spell_checker.scala	Tue Mar 07 13:55:49 2017 +0100
+++ /dev/null	Thu Jan 01 00:00:00 1970 +0000
@@ -1,392 +0,0 @@
-/*  Title:      Tools/jEdit/src/spell_checker.scala
-    Author:     Makarius
-
-Spell checker with completion, based on JOrtho (see
-http://sourceforge.net/projects/jortho).
-*/
-
-package isabelle.jedit
-
-
-import isabelle._
-
-import java.lang.Class
-
-import javax.swing.JMenuItem
-
-import scala.collection.mutable
-import scala.swing.ComboBox
-import scala.annotation.tailrec
-import scala.collection.immutable.SortedMap
-
-import org.gjt.sp.jedit.menu.EnhancedMenuItem
-import org.gjt.sp.jedit.{jEdit, Buffer}
-import org.gjt.sp.jedit.textarea.{JEditTextArea, TextArea}
-
-
-object Spell_Checker
-{
-  /** words within text **/
-
-  def marked_words(base: Text.Offset, text: String, mark: Text.Info[String] => Boolean)
-    : List[Text.Info[String]] =
-  {
-    val result = new mutable.ListBuffer[Text.Info[String]]
-    var offset = 0
-
-    def apostrophe(c: Int): Boolean =
-      c == '\'' && (offset + 1 == text.length || text(offset + 1) != '\'')
-
-    @tailrec def scan(pred: Int => Boolean)
-    {
-      if (offset < text.length) {
-        val c = text.codePointAt(offset)
-        if (pred(c)) {
-          offset += Character.charCount(c)
-          scan(pred)
-        }
-      }
-    }
-
-    while (offset < text.length) {
-      scan(c => !Character.isLetter(c))
-      val start = offset
-      scan(c => Character.isLetterOrDigit(c) || apostrophe(c))
-      val stop = offset
-      if (stop - start >= 2) {
-        val info = Text.Info(Text.Range(base + start, base + stop), text.substring(start, stop))
-        if (mark(info)) result += info
-      }
-    }
-    result.toList
-  }
-
-  def current_word(text_area: TextArea, rendering: JEdit_Rendering, range: Text.Range)
-    : Option[Text.Info[String]] =
-  {
-    for {
-      spell_range <- rendering.spell_checker_point(range)
-      text <- JEdit_Lib.try_get_text(text_area.getBuffer, spell_range)
-      info <- marked_words(spell_range.start, text, info => info.range.overlaps(range)).headOption
-    } yield info
-  }
-
-
-
-  /** completion **/
-
-  def completion(text_area: TextArea, explicit: Boolean, rendering: JEdit_Rendering)
-      : Option[Completion.Result] =
-  {
-    for {
-      spell_checker <- PIDE.spell_checker.get
-      if explicit
-      range = JEdit_Lib.before_caret_range(text_area, rendering)
-      word <- current_word(text_area, rendering, range)
-      words = spell_checker.complete(word.info)
-      if words.nonEmpty
-      descr = "(from dictionary " + quote(spell_checker.toString) + ")"
-      items =
-        words.map(w => Completion.Item(word.range, word.info, "", List(w, descr), w, 0, false))
-    } yield Completion.Result(word.range, word.info, false, items)
-  }
-
-
-
-  /** context menu **/
-
-  def context_menu(text_area: JEditTextArea, offset: Text.Offset): List[JMenuItem] =
-  {
-    val result =
-      for {
-        spell_checker <- PIDE.spell_checker.get
-        doc_view <- Document_View.get(text_area)
-        rendering = doc_view.get_rendering()
-        range = JEdit_Lib.point_range(text_area.getBuffer, offset)
-        Text.Info(_, word) <- current_word(text_area, rendering, range)
-      } yield (spell_checker, word)
-
-    result match {
-      case Some((spell_checker, word)) =>
-
-        val context = jEdit.getActionContext()
-        def item(name: String): JMenuItem =
-          new EnhancedMenuItem(context.getAction(name).getLabel, name, context)
-
-        val complete_items =
-          if (spell_checker.complete_enabled(word)) List(item("isabelle.complete-word"))
-          else Nil
-
-        val update_items =
-          if (spell_checker.check(word))
-            List(item("isabelle.exclude-word"), item("isabelle.exclude-word-permanently"))
-          else
-            List(item("isabelle.include-word"), item("isabelle.include-word-permanently"))
-
-        val reset_items =
-          spell_checker.reset_enabled() match {
-            case 0 => Nil
-            case n =>
-              val name = "isabelle.reset-words"
-              val label = context.getAction(name).getLabel
-              List(new EnhancedMenuItem(label + " (" + n + ")", name, context))
-          }
-
-        complete_items ::: update_items ::: reset_items
-
-      case None => Nil
-    }
-  }
-
-
-
-  /** dictionary **/
-
-  /* declarations */
-
-  class Dictionary private[Spell_Checker](val path: Path)
-  {
-    val lang = path.split_ext._1.base.implode
-    val user_path = Path.explode("$ISABELLE_HOME_USER/dictionaries") + Path.basic(lang)
-    override def toString: String = lang
-  }
-
-  private object Decl
-  {
-    def apply(name: String, include: Boolean): String =
-      if (include) name else "-" + name
-
-    def unapply(decl: String): Option[(String, Boolean)] =
-    {
-      val decl1 = decl.trim
-      if (decl1 == "" || decl1.startsWith("#")) None
-      else
-        Library.try_unprefix("-", decl1.trim) match {
-          case None => Some((decl1, true))
-          case Some(decl2) => Some((decl2, false))
-        }
-    }
-  }
-
-
-  /* known dictionaries */
-
-  def dictionaries(): List[Dictionary] =
-    for {
-      path <- Path.split(Isabelle_System.getenv("JORTHO_DICTIONARIES"))
-      if path.is_file
-    } yield new Dictionary(path)
-
-  def dictionaries_selector(): Option_Component =
-  {
-    GUI_Thread.require {}
-
-    val option_name = "spell_checker_dictionary"
-    val opt = PIDE.options.value.check_name(option_name)
-
-    val entries = dictionaries()
-    val component = new ComboBox(entries) with Option_Component {
-      name = option_name
-      val title = opt.title()
-      def load: Unit =
-      {
-        val lang = PIDE.options.string(option_name)
-        entries.find(_.lang == lang) match {
-          case Some(entry) => selection.item = entry
-          case None =>
-        }
-      }
-      def save: Unit = PIDE.options.string(option_name) = selection.item.lang
-    }
-
-    component.load()
-    component.tooltip = GUI.tooltip_lines(opt.print_default)
-    component
-  }
-
-
-  /* create spell checker */
-
-  def apply(dictionary: Dictionary): Spell_Checker = new Spell_Checker(dictionary)
-
-  private sealed case class Update(include: Boolean, permanent: Boolean)
-}
-
-
-class Spell_Checker private(dictionary: Spell_Checker.Dictionary)
-{
-  override def toString: String = dictionary.toString
-
-
-  /* main dictionary content */
-
-  private var dict = new Object
-  private var updates = SortedMap.empty[String, Spell_Checker.Update]
-
-  private def included_iterator(): Iterator[String] =
-    for {
-      (word, upd) <- updates.iterator
-      if upd.include
-    } yield word
-
-  private def excluded(word: String): Boolean =
-    updates.get(word) match {
-      case Some(upd) => !upd.include
-      case None => false
-    }
-
-  private def load()
-  {
-    val main_dictionary = split_lines(File.read_gzip(dictionary.path))
-
-    val permanent_updates =
-      if (dictionary.user_path.is_file)
-        for {
-          Spell_Checker.Decl(word, include) <- split_lines(File.read(dictionary.user_path))
-        } yield (word, Spell_Checker.Update(include, true))
-      else Nil
-
-    updates =
-      updates -- (for ((name, upd) <- updates.iterator; if upd.permanent) yield name) ++
-        permanent_updates
-
-    val factory_class = Class.forName("com.inet.jortho.DictionaryFactory")
-    val factory_cons = factory_class.getConstructor()
-    factory_cons.setAccessible(true)
-    val factory = factory_cons.newInstance()
-
-    val add = Untyped.method(factory_class, "add", classOf[String])
-
-    for {
-      word <- main_dictionary.iterator ++ included_iterator()
-      if !excluded(word)
-    } add.invoke(factory, word)
-
-    dict = Untyped.method(factory_class, "create").invoke(factory)
-  }
-  load()
-
-  private def save()
-  {
-    val permanent_decls =
-      (for {
-        (word, upd) <- updates.iterator
-        if upd.permanent
-      } yield Spell_Checker.Decl(word, upd.include)).toList
-
-    if (permanent_decls.nonEmpty || dictionary.user_path.is_file) {
-      val header = """# User updates for spell-checker dictionary
-#
-#   * each line contains at most one word
-#   * extra blanks are ignored
-#   * lines starting with "#" are stripped
-#   * lines starting with "-" indicate excluded words
-#
-#:mode=text:encoding=UTF-8:
-
-"""
-      Isabelle_System.mkdirs(dictionary.user_path.expand.dir)
-      File.write(dictionary.user_path, header + cat_lines(permanent_decls))
-    }
-  }
-
-  def update(word: String, include: Boolean, permanent: Boolean)
-  {
-    updates += (word -> Spell_Checker.Update(include, permanent))
-
-    if (include) {
-      if (permanent) save()
-      Untyped.method(dict.getClass, "add", classOf[String]).invoke(dict, word)
-    }
-    else { save(); load() }
-  }
-
-  def reset()
-  {
-    updates = SortedMap.empty
-    load()
-  }
-
-  def reset_enabled(): Int =
-    updates.valuesIterator.filter(upd => !upd.permanent).length
-
-
-  /* check known words */
-
-  def contains(word: String): Boolean =
-    Untyped.method(dict.getClass.getSuperclass, "exist", classOf[String]).
-      invoke(dict, word).asInstanceOf[java.lang.Boolean].booleanValue
-
-  def check(word: String): Boolean =
-    word match {
-      case Word.Case(c) if c != Word.Lowercase =>
-        contains(word) || contains(Word.lowercase(word))
-      case _ =>
-        contains(word)
-    }
-
-  def marked_words(base: Text.Offset, text: String): List[Text.Info[String]] =
-    Spell_Checker.marked_words(base, text, info => !check(info.info))
-
-
-  /* suggestions for unknown words */
-
-  private def suggestions(word: String): Option[List[String]] =
-  {
-    val res =
-      Untyped.method(dict.getClass.getSuperclass, "searchSuggestions", classOf[String]).
-        invoke(dict, word).asInstanceOf[java.util.List[AnyRef]].toArray.toList.map(_.toString)
-    if (res.isEmpty) None else Some(res)
-  }
-
-  def complete(word: String): List[String] =
-    if (check(word)) Nil
-    else {
-      val word_case = Word.Case.unapply(word)
-      def recover_case(s: String) =
-        word_case match {
-          case Some(c) => Word.Case(c, s)
-          case None => s
-        }
-      val result =
-        word_case match {
-          case Some(c) if c != Word.Lowercase =>
-            suggestions(word) orElse suggestions(Word.lowercase(word))
-          case _ =>
-            suggestions(word)
-        }
-      result.getOrElse(Nil).map(recover_case)
-    }
-
-  def complete_enabled(word: String): Boolean = complete(word).nonEmpty
-}
-
-
-class Spell_Checker_Variable
-{
-  private val no_spell_checker: (String, Option[Spell_Checker]) = ("", None)
-  private var current_spell_checker = no_spell_checker
-
-  def get: Option[Spell_Checker] = synchronized { current_spell_checker._2 }
-
-  def update(options: Options): Unit = synchronized {
-    if (options.bool("spell_checker")) {
-      val lang = options.string("spell_checker_dictionary")
-      if (current_spell_checker._1 != lang) {
-        Spell_Checker.dictionaries.find(_.lang == lang) match {
-          case Some(dictionary) =>
-            val spell_checker =
-              Exn.capture { Spell_Checker(dictionary) } match {
-                case Exn.Res(spell_checker) => Some(spell_checker)
-                case Exn.Exn(_) => None
-              }
-            current_spell_checker = (lang, spell_checker)
-          case None =>
-            current_spell_checker = no_spell_checker
-        }
-      }
-    }
-    else current_spell_checker = no_spell_checker
-  }
-}
-