eliminated char_width_int to avoid unclear rounding;
clarified integer conversion for margin;
/* Title: Tools/jEdit/src/pretty_text_area.scala
Author: Makarius
GUI component for pretty-printed text with markup, rendered like jEdit
text area.
*/
package isabelle.jedit
import isabelle._
import java.awt.{Color, Font, FontMetrics, Toolkit, Window}
import java.awt.event.{KeyEvent, KeyAdapter}
import org.gjt.sp.jedit.{jEdit, View, Registers}
import org.gjt.sp.jedit.textarea.{AntiAlias, JEditEmbeddedTextArea}
import org.gjt.sp.jedit.syntax.SyntaxStyle
import org.gjt.sp.util.{SyntaxUtilities, Log}
object Pretty_Text_Area
{
private def text_rendering(base_snapshot: Document.Snapshot, base_results: Command.Results,
formatted_body: XML.Body): (String, Rendering) =
{
val (text, state) = Pretty_Text_Area.document_state(base_snapshot, base_results, formatted_body)
val rendering = Rendering(state.snapshot(), PIDE.options.value)
(text, rendering)
}
private def document_state(base_snapshot: Document.Snapshot, base_results: Command.Results,
formatted_body: XML.Body): (String, Document.State) =
{
val command = Command.rich_text(Document.new_id(), base_results, formatted_body)
val node_name = command.node_name
val edits: List[Document.Edit_Text] =
List(node_name -> Document.Node.Edits(List(Text.Edit.insert(0, command.source))))
val state0 = base_snapshot.state.define_command(command)
val version0 = base_snapshot.version
val nodes0 = version0.nodes
val nodes1 = nodes0 + (node_name -> nodes0(node_name).update_commands(Linear_Set(command)))
val version1 = Document.Version.make(version0.syntax, nodes1)
val state1 =
state0.continue_history(Future.value(version0), edits, Future.value(version1))._2
.define_version(version1, state0.the_assignment(version0))
.assign(version1.id, List(command.id -> Some(Document.new_id())))._2
(command.source, state1)
}
}
class Pretty_Text_Area(
view: View,
close_action: () => Unit = () => (),
propagate_keys: Boolean = false) extends JEditEmbeddedTextArea
{
text_area =>
Swing_Thread.require()
private var current_font_family = "Dialog"
private var current_font_size: Int = 12
private var current_body: XML.Body = Nil
private var current_base_snapshot = Document.State.init.snapshot()
private var current_base_results = Command.Results.empty
private var current_rendering: Rendering =
Pretty_Text_Area.text_rendering(current_base_snapshot, current_base_results, Nil)._2
private var future_rendering: Option[java.util.concurrent.Future[Unit]] = None
private val rich_text_area =
new Rich_Text_Area(view, text_area, () => current_rendering, close_action,
caret_visible = false, hovering = true)
def get_background(): Option[Color] = None
def refresh()
{
Swing_Thread.require()
val font = new Font(current_font_family, Font.PLAIN, current_font_size)
getPainter.setFont(font)
getPainter.setAntiAlias(new AntiAlias(jEdit.getProperty("view.antiAlias")))
getPainter.setStyles(SyntaxUtilities.loadStyles(current_font_family, current_font_size))
val fold_line_style = new Array[SyntaxStyle](4)
for (i <- 0 to 3) {
fold_line_style(i) =
SyntaxUtilities.parseStyle(
jEdit.getProperty("view.style.foldLine." + i),
current_font_family, current_font_size, true)
}
getPainter.setFoldLineStyle(fold_line_style)
getGutter.setForeground(jEdit.getColorProperty("view.gutter.fgColor"))
getGutter.setBackground(jEdit.getColorProperty("view.gutter.bgColor"))
get_background().map(bg => { getPainter.setBackground(bg); getGutter.setBackground(bg) })
getGutter.setHighlightedForeground(jEdit.getColorProperty("view.gutter.highlightColor"))
getGutter.setFoldColor(jEdit.getColorProperty("view.gutter.foldColor"))
getGutter.setFont(jEdit.getFontProperty("view.gutter.font"))
getGutter.setBorder(0,
jEdit.getColorProperty("view.gutter.focusBorderColor"),
jEdit.getColorProperty("view.gutter.noFocusBorderColor"),
getPainter.getBackground)
getGutter.setFoldPainter(getFoldPainter)
getGutter.setGutterEnabled(jEdit.getBooleanProperty("view.gutter.enabled"))
if (getWidth > 0) {
val fm = getPainter.getFontMetrics
val margin = (getPainter.getWidth / (Pretty.char_width(fm).ceil.toInt max 1)) max 20
val base_snapshot = current_base_snapshot
val base_results = current_base_results
val formatted_body = Pretty.formatted(current_body, margin, Pretty.font_metric(fm))
future_rendering.map(_.cancel(true))
future_rendering = Some(default_thread_pool.submit(() =>
{
val (text, rendering) =
try { Pretty_Text_Area.text_rendering(base_snapshot, base_results, formatted_body) }
catch { case exn: Throwable => Log.log(Log.ERROR, this, exn); throw exn }
Simple_Thread.interrupted_exception()
Swing_Thread.later {
current_rendering = rendering
JEdit_Lib.buffer_edit(getBuffer) {
rich_text_area.active_reset()
getBuffer.setReadOnly(false)
getBuffer.setFoldHandler(new Fold_Handling.Document_Fold_Handler(rendering))
setText(text)
setCaretPosition(0)
getBuffer.setReadOnly(true)
}
}
}))
}
}
def resize(font_family: String, font_size: Int)
{
Swing_Thread.require()
current_font_family = font_family
current_font_size = font_size
refresh()
}
def update(base_snapshot: Document.Snapshot, base_results: Command.Results, body: XML.Body)
{
Swing_Thread.require()
require(!base_snapshot.is_outdated)
current_base_snapshot = base_snapshot
current_base_results = base_results
current_body = body
refresh()
}
/* key handling */
addKeyListener(new KeyAdapter {
override def keyPressed(evt: KeyEvent)
{
evt.getKeyCode match {
case KeyEvent.VK_C
if (evt.getModifiers & Toolkit.getDefaultToolkit.getMenuShortcutKeyMask) != 0 =>
Registers.copy(text_area, '$')
evt.consume
case KeyEvent.VK_ESCAPE =>
Pretty_Tooltip.windows().foreach(_.dismiss)
evt.consume
case _ =>
}
if (propagate_keys && !evt.isConsumed)
view.getInputHandler.processKeyEvent(evt, View.ACTION_BAR, false)
}
override def keyTyped(evt: KeyEvent)
{
if (propagate_keys && !evt.isConsumed)
view.getInputHandler.processKeyEvent(evt, View.ACTION_BAR, false)
}
})
/* init */
getPainter.setStructureHighlightEnabled(false)
getPainter.setLineHighlightEnabled(false)
getBuffer.setTokenMarker(new Token_Markup.Marker(true, None))
getBuffer.setReadOnly(true)
rich_text_area.activate()
}