/* 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}
object Document_View
{
def choose_color(command: Command, doc: Document): Color =
{
doc.current_state(command).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
/* visible document -- owned by Swing thread */
@volatile private var document = model.recent_document()
/* commands_changed_actor */
private val commands_changed_actor = actor {
loop {
react {
case Command_Set(changed) =>
Swing_Thread.now {
document = model.recent_document()
// FIXME cover doc states as well!!?
for (command <- changed if document.commands.contains(command)) {
update_syntax(command)
invalidate_line(command)
overview.repaint()
}
}
case bad => System.err.println("command_change_actor: ignoring bad message " + bad)
}
}
}
/* text_area_extension */
private val text_area_extension = new TextAreaExtension
{
override def paintValidLine(gfx: Graphics2D,
screen_line: Int, physical_line: Int, start: Int, end: Int, y: Int)
{
def from_current(pos: Int) = model.from_current(document, pos)
def to_current(pos: Int) = model.to_current(document, pos)
val metrics = text_area.getPainter.getFontMetrics
val saved_color = gfx.getColor
try {
for ((command, command_start) <-
document.command_range(from_current(start), from_current(end)))
{
val begin = start max to_current(command_start)
val finish = (end - 1) min to_current(command_start + command.length)
encolor(gfx, y, metrics.getHeight, begin, finish,
Document_View.choose_color(command, document), true)
}
}
finally { gfx.setColor(saved_color) }
}
override def getToolTipText(x: Int, y: Int): String =
{
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) getOrElse null
case None => null
}
}
}
/* caret handling */
def selected_command: Option[Command] =
document.command_at(text_area.getCaretPosition) match {
case Some((command, _)) => Some(command)
case None => None
}
private val caret_listener = new CaretListener
{
private var last_selected_command: Option[Command] = None
override def caretUpdate(e: CaretEvent)
{
val selected = selected_command
if (selected != last_selected_command) {
last_selected_command = selected
if (selected.isDefined) session.indicate_command_change(selected.get)
}
}
}
/* (re)painting */
private val update_delay = Swing_Thread.delay_first(500) { model.buffer.propertiesChanged() }
// FIXME update_delay property
private def update_syntax(cmd: Command)
{
val (line1, line2) = model.lines_of_command(document, cmd)
if (line2 >= text_area.getFirstLine &&
line1 <= text_area.getFirstLine + text_area.getVisibleLines)
update_delay()
}
private def invalidate_line(cmd: Command) =
{
val (start, stop) = model.lines_of_command(document, cmd)
text_area.invalidateLineRange(start, stop)
}
private def invalidate_all() =
text_area.invalidateLineRange(text_area.getFirstPhysicalLine,
text_area.getLastPhysicalLine)
private def encolor(gfx: Graphics2D,
y: Int, height: Int, begin: Int, finish: Int, color: Color, fill: Boolean)
{
val start = text_area.offsetToXY(begin)
val stop =
if (finish < model.buffer.getLength) text_area.offsetToXY(finish)
else {
val p = text_area.offsetToXY(finish - 1)
val metrics = text_area.getPainter.getFontMetrics
p.x = p.x + (metrics.charWidth(' ') max metrics.getMaxAdvance)
p
}
if (start != null && stop != null) {
gfx.setColor(color)
if (fill) gfx.fillRect(start.x, y, stop.x - start.x, height)
else gfx.drawRect(start.x, y, stop.x - start.x, height)
}
}
/* 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
for ((command, start) <- document.command_range(0)) {
val line1 = buffer.getLineOfOffset(model.to_current(document, start))
val line2 = buffer.getLineOfOffset(model.to_current(document, start + command.length)) + 1
val y = line_to_y(line1)
val height = HEIGHT * (line2 - line1)
gfx.setColor(Document_View.choose_color(command, document))
gfx.fillRect(0, y, getWidth - 1, height)
}
}
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)
}
}