basic support for subexpression highlighting (see also gatchan.jedit.hyperlinks.HyperlinkManager/HyperlinkTextAreaPainter);
/* Title: Tools/jEdit/src/jedit/document_view.scala
Author: Fabian Immler, TU Munich
Author: Makarius
Document view connected to jEdit text area.
*/
package isabelle.jedit
import isabelle._
import scala.actors.Actor._
import java.awt.event.{MouseAdapter, MouseMotionAdapter, MouseEvent, FocusAdapter, FocusEvent}
import java.awt.{BorderLayout, Graphics, Dimension, Color, Graphics2D}
import javax.swing.{JPanel, ToolTipManager}
import javax.swing.event.{CaretListener, CaretEvent}
import org.gjt.sp.jedit.OperatingSystem
import org.gjt.sp.jedit.gui.RolloverButton
import org.gjt.sp.jedit.textarea.{JEditTextArea, TextArea, TextAreaExtension, TextAreaPainter}
import org.gjt.sp.jedit.syntax.SyntaxStyle
object Document_View
{
/* physical rendering */
def status_color(snapshot: Document.Snapshot, command: Command): Color =
{
val state = snapshot.state(command)
if (snapshot.is_outdated) new Color(240, 240, 240)
else
Isar_Document.command_status(state.status) match {
case Isar_Document.Forked(i) if i > 0 => new Color(255, 228, 225)
case Isar_Document.Finished => new Color(234, 248, 255)
case Isar_Document.Failed => new Color(255, 193, 193)
case Isar_Document.Unprocessed => new Color(255, 228, 225)
case _ => Color.red
}
}
val message_markup: PartialFunction[Text.Info[Any], Color] =
{
case Text.Info(_, XML.Elem(Markup(Markup.WRITELN, _), _)) => new Color(220, 220, 220)
case Text.Info(_, XML.Elem(Markup(Markup.WARNING, _), _)) => new Color(255, 165, 0)
case Text.Info(_, XML.Elem(Markup(Markup.ERROR, _), _)) => new Color(255, 106, 106)
}
/* document view of text area */
private val key = new Object
def init(model: Document_Model, text_area: TextArea): Document_View =
{
Swing_Thread.require()
val doc_view = new Document_View(model, text_area)
text_area.putClientProperty(key, doc_view)
doc_view.activate()
doc_view
}
def apply(text_area: TextArea): Option[Document_View] =
{
Swing_Thread.require()
text_area.getClientProperty(key) match {
case doc_view: Document_View => Some(doc_view)
case _ => None
}
}
def exit(text_area: TextArea)
{
Swing_Thread.require()
apply(text_area) match {
case None => error("No document view for text area: " + text_area)
case Some(doc_view) =>
doc_view.deactivate()
text_area.putClientProperty(key, null)
}
}
}
class Document_View(val model: Document_Model, text_area: TextArea)
{
private val session = model.session
/* extended token styles */
private var styles: Array[SyntaxStyle] = null // owned by Swing thread
def extend_styles()
{
Swing_Thread.require()
styles = Document_Model.Token_Markup.extend_styles(text_area.getPainter.getStyles)
}
extend_styles()
def set_styles()
{
Swing_Thread.require()
text_area.getPainter.setStyles(styles)
}
/* visible line ranges */
// simplify slightly odd result of TextArea.getScreenLineEndOffset etc.
// NB: jEdit already normalizes \r\n and \r to \n
def proper_line_range(start: Text.Offset, end: Text.Offset): Text.Range =
{
val stop = if (start < end) end - 1 else end min model.buffer.getLength
Text.Range(start, stop)
}
def screen_lines_range(): Text.Range =
{
val start = text_area.getScreenLineStartOffset(0)
val raw_end = text_area.getScreenLineEndOffset(text_area.getVisibleLines - 1 max 0)
proper_line_range(start, if (raw_end >= 0) raw_end else model.buffer.getLength)
}
/* commands_changed_actor */
private val commands_changed_actor = actor {
loop {
react {
case Session.Commands_Changed(changed) =>
val buffer = model.buffer
Isabelle.swing_buffer_lock(buffer) {
val snapshot = model.snapshot()
if (changed.exists(snapshot.node.commands.contains))
overview.repaint()
val visible_range = screen_lines_range()
val visible_cmds = snapshot.node.command_range(snapshot.revert(visible_range)).map(_._1)
if (visible_cmds.exists(changed)) {
for {
line <- 0 until text_area.getVisibleLines
val start = text_area.getScreenLineStartOffset(line) if start >= 0
val end = text_area.getScreenLineEndOffset(line) if end >= 0
val range = proper_line_range(start, end)
val line_cmds = snapshot.node.command_range(snapshot.revert(range)).map(_._1)
if line_cmds.exists(changed)
} text_area.invalidateScreenLineRange(line, line)
// FIXME danger of deadlock!?
// FIXME potentially slow!?
model.buffer.propertiesChanged()
}
}
case bad => System.err.println("command_change_actor: ignoring bad message " + bad)
}
}
}
/* subexpression highlighting */
private var highlight_point: Option[(Int, Int)] = None
private val focus_listener = new FocusAdapter {
override def focusLost(e: FocusEvent) { highlight_point = None }
}
private val mouse_motion_listener = new MouseMotionAdapter {
override def mouseMoved(e: MouseEvent) {
val control = if (OperatingSystem.isMacOS()) e.isMetaDown else e.isControlDown
def refresh()
{
val offset = text_area.xyToOffset(e.getX(), e.getY())
text_area.invalidateLine(model.buffer.getLineOfOffset(offset))
}
if (!model.buffer.isLoaded) highlight_point = None
else if (!control) { highlight_point = None; refresh() }
else { highlight_point = Some((e.getX(), e.getY())); refresh() }
}
}
/* text_area_extension */
private val text_area_extension = new TextAreaExtension
{
override def paintScreenLineRange(gfx: Graphics2D,
first_line: Int, last_line: Int, physical_lines: Array[Int],
start: Array[Int], end: Array[Int], y: Int, line_height: Int)
{
Isabelle.swing_buffer_lock(model.buffer) {
val snapshot = model.snapshot()
val saved_color = gfx.getColor
val ascent = text_area.getPainter.getFontMetrics.getAscent
// subexpression markup
val subexp_markup: PartialFunction[Text.Info[Any], Option[Text.Range]] =
{
case Text.Info(range, XML.Elem(Markup(Markup.ML_TYPING, _), _)) => Some(range)
}
val subexp_range: Option[Text.Range] =
highlight_point match {
case Some((x, y)) =>
val offset = text_area.xyToOffset(x, y)
val markup =
snapshot.select_markup(Text.Range(offset, offset + 1))(subexp_markup)(None)
if (markup.hasNext) markup.next.info else None
case None => None
}
try {
for (i <- 0 until physical_lines.length) {
if (physical_lines(i) != -1) {
val line_range = proper_line_range(start(i), end(i))
// background color
val cmds = snapshot.node.command_range(snapshot.revert(line_range))
for {
(command, command_start) <- cmds if !command.is_ignored
val range = line_range.restrict(snapshot.convert(command.range + command_start))
r <- Isabelle.gfx_range(text_area, range)
} {
gfx.setColor(Document_View.status_color(snapshot, command))
gfx.fillRect(r.x, y + i * line_height, r.length, line_height)
}
// subexpression highlighting
if (subexp_range.isDefined) {
val range = snapshot.convert(subexp_range.get)
if (line_range.overlaps(range)) {
Isabelle.gfx_range(text_area, line_range.restrict(range)) match {
case None =>
case Some(r) =>
gfx.setColor(Color.black)
gfx.drawRect(r.x, y + i * line_height, r.length, line_height - 1)
}
}
}
// squiggly underline
for {
Text.Info(range, color) <-
snapshot.select_markup(line_range)(Document_View.message_markup)(null)
if color != null
r <- Isabelle.gfx_range(text_area, range)
} {
gfx.setColor(color)
val x0 = (r.x / 2) * 2
val y0 = r.y + ascent + 1
for (x1 <- Range(x0, x0 + r.length, 2)) {
val y1 = if (x1 % 4 < 2) y0 else y0 + 1
gfx.drawLine(x1, y1, x1 + 1, y1)
}
}
}
}
}
finally { gfx.setColor(saved_color) }
}
}
override def getToolTipText(x: Int, y: Int): String =
{
Isabelle.swing_buffer_lock(model.buffer) {
val snapshot = model.snapshot()
val offset = text_area.xyToOffset(x, y)
val markup =
snapshot.select_markup(Text.Range(offset, offset + 1)) {
case Text.Info(range, XML.Elem(Markup(Markup.ML_TYPING, _), body)) =>
Isabelle.tooltip(Pretty.string_of(List(Pretty.block(body)), margin = 40))
} { null }
if (markup.hasNext) markup.next.info else null
}
}
}
/* caret handling */
def selected_command(): Option[Command] =
{
Swing_Thread.require()
model.snapshot().node.proper_command_at(text_area.getCaretPosition)
}
private val caret_listener = new CaretListener {
private val delay = Swing_Thread.delay_last(session.input_delay) {
session.perspective.event(Session.Perspective)
}
override def caretUpdate(e: CaretEvent) { delay() }
}
/* overview of command status left of scrollbar */
private val overview = new JPanel(new BorderLayout)
{
private val WIDTH = 10
private val HEIGHT = 2
setPreferredSize(new Dimension(WIDTH, 0))
setRequestFocusEnabled(false)
addMouseListener(new MouseAdapter {
override def mousePressed(event: MouseEvent) {
val line = y_to_line(event.getY)
if (line >= 0 && line < text_area.getLineCount)
text_area.setCaretPosition(text_area.getLineStartOffset(line))
}
})
override def addNotify() {
super.addNotify()
ToolTipManager.sharedInstance.registerComponent(this)
}
override def removeNotify() {
ToolTipManager.sharedInstance.unregisterComponent(this)
super.removeNotify
}
override def getToolTipText(event: MouseEvent): String =
{
val line = y_to_line(event.getY())
if (line >= 0 && line < text_area.getLineCount) "<html><b>TODO:</b><br>Tooltip</html>"
else ""
}
override def paintComponent(gfx: Graphics)
{
super.paintComponent(gfx)
Swing_Thread.assert()
val buffer = model.buffer
Isabelle.buffer_lock(buffer) {
val snapshot = model.snapshot()
val saved_color = gfx.getColor // FIXME needed!?
try {
for ((command, start) <- snapshot.node.command_starts if !command.is_ignored) {
val line1 = buffer.getLineOfOffset(snapshot.convert(start))
val line2 = buffer.getLineOfOffset(snapshot.convert(start + command.length)) + 1
val y = line_to_y(line1)
val height = HEIGHT * (line2 - line1)
gfx.setColor(Document_View.status_color(snapshot, command))
gfx.fillRect(0, y, getWidth - 1, height)
}
}
finally { gfx.setColor(saved_color) }
}
}
private def line_to_y(line: Int): Int =
(line * getHeight) / (text_area.getBuffer.getLineCount max text_area.getVisibleLines)
private def y_to_line(y: Int): Int =
(y * (text_area.getBuffer.getLineCount max text_area.getVisibleLines)) / getHeight
}
/* activation */
private def activate()
{
text_area.getPainter.
addExtension(TextAreaPainter.LINE_BACKGROUND_LAYER + 1, text_area_extension)
text_area.addFocusListener(focus_listener)
text_area.getPainter.addMouseMotionListener(mouse_motion_listener)
text_area.addCaretListener(caret_listener)
text_area.addLeftOfScrollBar(overview)
session.commands_changed += commands_changed_actor
}
private def deactivate()
{
session.commands_changed -= commands_changed_actor
text_area.removeFocusListener(focus_listener)
text_area.getPainter.removeMouseMotionListener(mouse_motion_listener)
text_area.removeCaretListener(caret_listener)
text_area.removeLeftOfScrollBar(overview)
text_area.getPainter.removeExtension(text_area_extension)
}
}