Session: predefined real time parameters;
Document_View: delayed caret handling, for improved reactivity;
selected_command: proper_command_at ignores ignored commands;
/* 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, MouseEvent}
import java.awt.{BorderLayout, Graphics, Dimension, Color, Graphics2D}
import javax.swing.{JPanel, ToolTipManager}
import javax.swing.event.{CaretListener, CaretEvent}
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
{
def choose_color(document: Document, command: Command): Color =
{
val state = document.current_state(command)
if (state.forks > 0) new Color(255, 228, 225)
else if (state.forks < 0) Color.red
else
state.status match {
case Command.Status.UNPROCESSED => new Color(255, 228, 225)
case Command.Status.FINISHED => new Color(234, 248, 255)
case Command.Status.FAILED => new Color(255, 193, 193)
case Command.Status.UNDEFINED => Color.red
}
}
/* document view of text area */
private val key = new Object
def init(model: Document_Model, text_area: TextArea): Document_View =
{
Swing_Thread.assert()
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.assert()
text_area.getClientProperty(key) match {
case doc_view: Document_View => Some(doc_view)
case _ => None
}
}
def exit(text_area: TextArea)
{
Swing_Thread.assert()
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.assert()
styles = Isabelle_Token_Marker.extend_styles(text_area.getPainter.getStyles)
}
extend_styles()
def set_styles()
{
Swing_Thread.assert()
text_area.getPainter.setStyles(styles)
}
/* commands_changed_actor */
private val commands_changed_actor = actor {
loop {
react {
case Command_Set(changed) =>
Swing_Thread.now {
// FIXME cover doc states as well!!?
val document = model.recent_document()
if (changed.exists(document.commands.contains))
full_repaint(document, changed)
}
case bad => System.err.println("command_change_actor: ignoring bad message " + bad)
}
}
}
def full_repaint(document: Document, changed: Set[Command])
{
Swing_Thread.assert()
val buffer = model.buffer
var visible_change = false
for ((command, start) <- document.command_starts) {
if (changed(command)) {
val stop = start + command.length
val line1 = buffer.getLineOfOffset(model.to_current(document, start))
val line2 = buffer.getLineOfOffset(model.to_current(document, stop))
if (line2 >= text_area.getFirstLine &&
line1 <= text_area.getFirstLine + text_area.getVisibleLines)
visible_change = true
text_area.invalidateLineRange(line1, line2)
}
}
if (visible_change) model.buffer.propertiesChanged()
overview.repaint() // FIXME paint here!?
}
/* 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], y0: Int, line_height: Int)
{
Swing_Thread.now {
val document = model.recent_document()
def from_current(pos: Int) = model.from_current(document, pos)
def to_current(pos: Int) = model.to_current(document, pos)
val command_range: Iterable[(Command, Int)] =
{
val range = document.command_range(from_current(start(0)))
if (range.hasNext) {
val (cmd0, start0) = range.next
new Iterable[(Command, Int)] {
def iterator = Document.command_starts(document.commands.iterator(cmd0), start0)
}
}
else Iterable.empty
}
val saved_color = gfx.getColor
try {
var y = y0
for (i <- 0 until physical_lines.length) {
if (physical_lines(i) != -1) {
val line_start = start(i)
val line_end = model.visible_line_end(line_start, end(i))
val a = from_current(line_start)
val b = from_current(line_end)
val cmds = command_range.iterator.
dropWhile { case (cmd, c) => c + cmd.length <= a } .
takeWhile { case (_, c) => c < b }
for ((command, command_start) <- cmds if !command.is_ignored) {
val p = text_area.offsetToXY(line_start max to_current(command_start))
val q = text_area.offsetToXY(line_end min to_current(command_start + command.length))
assert(p.y == q.y)
gfx.setColor(Document_View.choose_color(document, command))
gfx.fillRect(p.x, y, q.x - p.x, line_height)
}
}
y += line_height
}
}
finally { gfx.setColor(saved_color) }
}
}
override def getToolTipText(x: Int, y: Int): String =
{
val document = model.recent_document()
val offset = model.from_current(document, text_area.xyToOffset(x, y))
document.command_at(offset) match {
case Some((command, command_start)) =>
document.current_state(command).type_at(offset - command_start) match {
case Some(text) => Isabelle.tooltip(text)
case None => null
}
case None => null
}
}
}
/* caret handling */
def selected_command(): Option[Command] =
model.recent_document().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)
val buffer = model.buffer
val document = model.recent_document()
def to_current(pos: Int) = model.to_current(document, pos)
val saved_color = gfx.getColor // FIXME needed!?
try {
for ((command, start) <- document.command_starts if !command.is_ignored) {
val line1 = buffer.getLineOfOffset(to_current(start))
val line2 = buffer.getLineOfOffset(to_current(start + command.length)) + 1
val y = line_to_y(line1)
val height = HEIGHT * (line2 - line1)
gfx.setColor(Document_View.choose_color(document, 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.addCaretListener(caret_listener)
text_area.addLeftOfScrollBar(overview)
session.commands_changed += commands_changed_actor
}
private def deactivate()
{
session.commands_changed -= commands_changed_actor
text_area.removeLeftOfScrollBar(overview)
text_area.removeCaretListener(caret_listener)
text_area.getPainter.removeExtension(text_area_extension)
}
}