src/Pure/GUI/gui.scala
author wenzelm
Tue, 12 Aug 2014 12:06:22 +0200
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child 59080 611914621edb
permissions -rw-r--r--
separate Java FX modules -- no need to include jfxrt.jar by default;
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/*  Title:      Pure/GUI/gui.scala
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    Module:     PIDE-GUI
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    Author:     Makarius
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Basic GUI tools (for AWT/Swing).
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*/
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package isabelle
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import java.lang.{ClassLoader, ClassNotFoundException, NoSuchMethodException}
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import java.io.{FileInputStream, BufferedInputStream}
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import java.awt.{GraphicsEnvironment, Image, Component, Container, Toolkit, Window, Font,
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  KeyboardFocusManager}
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import java.awt.font.{TextAttribute, TransformAttribute, FontRenderContext, LineMetrics}
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import java.awt.geom.AffineTransform
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import javax.swing.{ImageIcon, JOptionPane, UIManager, JLayeredPane, JFrame, JWindow, JDialog,
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  JButton, JTextField}
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import scala.collection.convert.WrapAsJava
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import scala.swing.{ComboBox, TextArea, ScrollPane}
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import scala.swing.event.SelectionChanged
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object GUI
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{
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  /* Swing look-and-feel */
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  def get_laf(): String =
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  {
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    if (Platform.is_windows || Platform.is_macos)
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      UIManager.getSystemLookAndFeelClassName()
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    else
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      UIManager.getInstalledLookAndFeels().find(_.getName == "Nimbus").map(_.getClassName)
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        .getOrElse(UIManager.getCrossPlatformLookAndFeelClassName())
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  }
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  def init_laf(): Unit = UIManager.setLookAndFeel(get_laf())
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  def is_macos_laf(): Boolean =
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    Platform.is_macos &&
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    UIManager.getSystemLookAndFeelClassName() == UIManager.getLookAndFeel.getClass.getName
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  /* plain focus traversal, notably for text fields */
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  def plain_focus_traversal(component: Component)
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  {
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    val dummy_button = new JButton
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    def apply(id: Int): Unit =
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      component.setFocusTraversalKeys(id, dummy_button.getFocusTraversalKeys(id))
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    apply(KeyboardFocusManager.FORWARD_TRAVERSAL_KEYS)
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    apply(KeyboardFocusManager.BACKWARD_TRAVERSAL_KEYS)
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  }
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  /* X11 window manager */
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  def window_manager(): Option[String] =
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  {
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    if (Platform.is_windows || Platform.is_macos) None
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    else
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      try {
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        val XWM = Class.forName("sun.awt.X11.XWM", true, ClassLoader.getSystemClassLoader)
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        val getWM = XWM.getDeclaredMethod("getWM")
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        getWM.setAccessible(true)
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        getWM.invoke(null) match {
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          case null => None
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          case wm => Some(wm.toString)
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        }
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      }
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      catch {
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        case _: ClassNotFoundException => None
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        case _: NoSuchMethodException => None
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      }
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  }
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  /* simple dialogs */
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  def scrollable_text(txt: String, width: Int = 60, height: Int = 20, editable: Boolean = false)
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    : ScrollPane =
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  {
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    val text = new TextArea(txt)
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    if (width > 0) text.columns = width
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    if (height > 0 && split_lines(txt).length > height) text.rows = height
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    text.editable = editable
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    new ScrollPane(text)
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  }
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  private def simple_dialog(kind: Int, default_title: String,
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    parent: Component, title: String, message: Seq[Any])
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  {
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    GUI_Thread.now {
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      val java_message = message map { case x: scala.swing.Component => x.peer case x => x }
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      JOptionPane.showMessageDialog(parent,
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        java_message.toArray.asInstanceOf[Array[AnyRef]],
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        if (title == null) default_title else title, kind)
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    }
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  }
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  def dialog(parent: Component, title: String, message: Any*): Unit =
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    simple_dialog(JOptionPane.PLAIN_MESSAGE, null, parent, title, message)
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  def warning_dialog(parent: Component, title: String, message: Any*): Unit =
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    simple_dialog(JOptionPane.WARNING_MESSAGE, "Warning", parent, title, message)
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  def error_dialog(parent: Component, title: String, message: Any*): Unit =
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    simple_dialog(JOptionPane.ERROR_MESSAGE, "Error", parent, title, message)
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  def confirm_dialog(parent: Component, title: String, option_type: Int, message: Any*): Int =
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    GUI_Thread.now {
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      val java_message = message map { case x: scala.swing.Component => x.peer case x => x }
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      JOptionPane.showConfirmDialog(parent,
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        java_message.toArray.asInstanceOf[Array[AnyRef]], title,
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          option_type, JOptionPane.QUESTION_MESSAGE)
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    }
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  /* zoom box */
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  private val Zoom_Factor = "([0-9]+)%?".r
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  abstract class Zoom_Box extends ComboBox[String](
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    List("50%", "70%", "85%", "100%", "125%", "150%", "175%", "200%", "300%", "400%"))
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  {
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    def changed: Unit
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    def factor: Int = parse(selection.item)
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    private def parse(text: String): Int =
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      text match {
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        case Zoom_Factor(s) =>
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          val i = Integer.parseInt(s)
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          if (10 <= i && i < 1000) i else 100
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        case _ => 100
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      }
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    private def print(i: Int): String = i.toString + "%"
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    def set_item(i: Int) {
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      peer.getEditor match {
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        case null =>
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        case editor => editor.setItem(print(i))
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      }
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    }
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    makeEditable()(c => new ComboBox.BuiltInEditor(c)(text => print(parse(text)), x => x))
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    peer.getEditor.getEditorComponent match {
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      case text: JTextField => text.setColumns(4)
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      case _ =>
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    }
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    selection.index = 3
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    listenTo(selection)
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    reactions += { case SelectionChanged(_) => changed }
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  }
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  /* tooltip with multi-line support */
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  def tooltip_lines(text: String): String =
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    if (text == null || text == "") null
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    else "<html>" + HTML.encode(text) + "</html>"
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  /* screen resolution */
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  def resolution_scale(): Double = Toolkit.getDefaultToolkit.getScreenResolution.toDouble / 72
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  def resolution_scale(i: Int): Int = (i.toDouble * resolution_scale()).round.toInt
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  /* icon */
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  def isabelle_icon(): ImageIcon =
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    new ImageIcon(getClass.getClassLoader.getResource("isabelle/isabelle_transparent-32.gif"))
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  def isabelle_icons(): List[ImageIcon] =
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    for (icon <- List("isabelle/isabelle_transparent-32.gif", "isabelle/isabelle_transparent.gif"))
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      yield new ImageIcon(getClass.getClassLoader.getResource(icon))
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  def isabelle_image(): Image = isabelle_icon().getImage
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  def isabelle_images(): java.util.List[Image] =
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    WrapAsJava.seqAsJavaList(isabelle_icons.map(_.getImage))
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  /* component hierachy */
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  def get_parent(component: Component): Option[Container] =
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    component.getParent match {
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      case null => None
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      case parent => Some(parent)
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    }
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  def ancestors(component: Component): Iterator[Container] = new Iterator[Container] {
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    private var next_elem = get_parent(component)
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    def hasNext(): Boolean = next_elem.isDefined
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    def next(): Container =
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      next_elem match {
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        case Some(parent) =>
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          next_elem = get_parent(parent)
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          parent
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        case None => Iterator.empty.next()
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      }
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  }
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  def parent_window(component: Component): Option[Window] =
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    ancestors(component).collectFirst({ case x: Window => x })
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  def layered_pane(component: Component): Option[JLayeredPane] =
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    parent_window(component) match {
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      case Some(w: JWindow) => Some(w.getLayeredPane)
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      case Some(w: JFrame) => Some(w.getLayeredPane)
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      case Some(w: JDialog) => Some(w.getLayeredPane)
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      case _ => None
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    }
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  /* font operations */
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  def font_metrics(font: Font): LineMetrics =
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    font.getLineMetrics("", new FontRenderContext(null, false, false))
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  def imitate_font(family: String, font: Font, scale: Double = 1.0): Font =
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  {
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    val font1 = new Font(family, font.getStyle, font.getSize)
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    val size = scale * (font_metrics(font).getAscent / font_metrics(font1).getAscent * font.getSize)
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    font1.deriveFont(size.round.toInt)
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  }
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  def transform_font(font: Font, transform: AffineTransform): Font =
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  {
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    import scala.collection.JavaConversions._
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    font.deriveFont(Map(TextAttribute.TRANSFORM -> new TransformAttribute(transform)))
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  }
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  def font(family: String = "IsabelleText", size: Int = 1, bold: Boolean = false): Font =
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    new Font(family, if (bold) Font.BOLD else Font.PLAIN, size)
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  def install_fonts()
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  {
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    val ge = GraphicsEnvironment.getLocalGraphicsEnvironment()
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    for (font <- Path.split(Isabelle_System.getenv_strict("ISABELLE_FONTS")))
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      ge.registerFont(Font.createFont(Font.TRUETYPE_FONT, font.file))
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  }
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}
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