/*
* jEdit text area as document text source
*
* @author Fabian Immler, TU Munich
* @author Johannes Hölzl, TU Munich
* @author Makarius
*/
package isabelle.jedit
import scala.actors.Actor
import isabelle.proofdocument.Text
import isabelle.prover.{Prover, Command}
import java.awt.Graphics2D
import java.awt.event.{ActionEvent, ActionListener}
import java.awt.Color
import javax.swing.Timer
import javax.swing.event.{CaretListener, CaretEvent}
import org.gjt.sp.jedit.buffer.{BufferListener, JEditBuffer}
import org.gjt.sp.jedit.textarea.{JEditTextArea, TextAreaExtension, TextAreaPainter}
import org.gjt.sp.jedit.syntax.SyntaxStyle
object TheoryView {
val MAX_CHANGE_LENGTH = 1500
def choose_color(state: Command): Color = {
if (state == null) 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, 192, 192)
case _ => Color.red
}
}
}
class TheoryView (text_area: JEditTextArea, document_actor: Actor)
extends TextAreaExtension with BufferListener {
def id() = Isabelle.plugin.id();
private val buffer = text_area.getBuffer
private val prover = Isabelle.prover_setup(buffer).get.prover
buffer.addBufferListener(this)
private var col: Text.Change = null
private val col_timer = new Timer(300, new ActionListener() {
override def actionPerformed(e: ActionEvent) = commit
})
col_timer.stop
col_timer.setRepeats(true)
private val phase_overview = new PhaseOverviewPanel(prover, text_area, to_current)
/* activation */
private val selected_state_controller = new CaretListener {
override def caretUpdate(e: CaretEvent) = {
val doc = prover.document
val cmd = doc.find_command_at(e.getDot)
if (cmd != null && doc.token_start(cmd.tokens.first) <= e.getDot &&
Isabelle.prover_setup(buffer).get.selected_state != cmd)
Isabelle.prover_setup(buffer).get.selected_state = cmd
}
}
def activate() = {
text_area.addCaretListener(selected_state_controller)
text_area.addLeftOfScrollBar(phase_overview)
text_area.getPainter.addExtension(TextAreaPainter.LINE_BACKGROUND_LAYER + 1, this)
buffer.setTokenMarker(new DynamicTokenMarker(buffer, prover))
}
def deactivate() = {
text_area.getPainter.removeExtension(this)
text_area.removeLeftOfScrollBar(phase_overview)
text_area.removeCaretListener(selected_state_controller)
}
/* painting */
val repaint_delay = new isabelle.utils.Delay(100, () => repaint_all())
val change_receiver = scala.actors.Actor.actor {
scala.actors.Actor.loop {
scala.actors.Actor.react {
case _ => {
Swing.now {
repaint_delay.delay_or_ignore()
phase_overview.repaint_delay.delay_or_ignore()
}
}
}
}
}.start
def _from_current(to_id: String, changes: List[Text.Change], pos: Int): Int =
changes match {
case Nil => pos
case Text.Change(id, start, added, removed) :: rest_changes => {
val shifted = if (start <= pos)
if (pos < start + added.length) start
else pos - added.length + removed
else pos
if (id == to_id) pos
else _from_current(to_id, rest_changes, shifted)
}
}
def _to_current(from_id: String, changes: List[Text.Change], pos: Int): Int =
changes match {
case Nil => pos
case Text.Change(id, start, added, removed) :: rest_changes => {
val shifted = _to_current(from_id, rest_changes, pos)
if (id == from_id) pos
else if (start <= shifted) {
if (shifted < start + removed) start
else shifted + added.length - removed
} else shifted
}
}
def to_current(from_id: String, pos : Int) =
_to_current(from_id, if (col == null) changes else col :: changes, pos)
def from_current(to_id: String, pos : Int) =
_from_current(to_id, if (col == null) changes else col :: changes, pos)
def to_current(document: isabelle.proofdocument.ProofDocument, pos: Int): Int =
to_current(document.id, pos)
def from_current(document: isabelle.proofdocument.ProofDocument, pos: Int): Int =
from_current(document.id, pos)
def repaint(cmd: Command) =
{
val document = prover.document
if (text_area != null) {
val start = text_area.getLineOfOffset(to_current(document.id, cmd.start(document)))
val stop = text_area.getLineOfOffset(to_current(document.id, cmd.stop(document)) - 1)
text_area.invalidateLineRange(start, stop)
if (Isabelle.prover_setup(buffer).get.selected_state == cmd)
Isabelle.prover_setup(buffer).get.selected_state = cmd // update State view
}
}
def repaint_all() =
{
if (text_area != null)
text_area.invalidateLineRange(text_area.getFirstPhysicalLine, text_area.getLastPhysicalLine)
}
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 < 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)
}
}
/* TextAreaExtension methods */
override def paintValidLine(gfx: Graphics2D,
screen_line: Int, physical_line: Int, start: Int, end: Int, y: Int) =
{
val document = prover.document
def from_current(pos: Int) = this.from_current(document.id, pos)
def to_current(pos: Int) = this.to_current(document.id, pos)
val saved_color = gfx.getColor
val metrics = text_area.getPainter.getFontMetrics
// encolor phase
var e = document.find_command_at(from_current(start))
while (e != null && e.start(document) < end) {
val begin = start max to_current(e.start(document))
val finish = end - 1 min to_current(e.stop(document))
encolor(gfx, y, metrics.getHeight, begin, finish, TheoryView.choose_color(e), true)
e = document.commands.next(e).getOrElse(null)
}
gfx.setColor(saved_color)
}
override def getToolTipText(x: Int, y: Int) = {
val document = prover.document
val offset = from_current(document.id, text_area.xyToOffset(x, y))
val cmd = document.find_command_at(offset)
if (cmd != null) {
document.token_start(cmd.tokens.first)
cmd.type_at(offset - cmd.start(document))
} else null
}
/* BufferListener methods */
private var changes: List[Text.Change] = Nil
private def commit: Unit = synchronized {
if (col != null) {
def split_changes(c: Text.Change): List[Text.Change] = {
val MCL = TheoryView.MAX_CHANGE_LENGTH
if (c.added.length <= MCL) List(c)
else Text.Change(c.id, c.start, c.added.substring(0, MCL), c.removed) ::
split_changes(new Text.Change(id(), c.start + MCL, c.added.substring(MCL), c.removed))
}
val new_changes = split_changes(col)
changes = new_changes.reverse ::: changes
new_changes map (document_actor ! _)
}
col = null
if (col_timer.isRunning())
col_timer.stop()
}
private def delay_commit {
if (col_timer.isRunning())
col_timer.restart()
else
col_timer.start()
}
override def contentInserted(buffer: JEditBuffer,
start_line: Int, offset: Int, num_lines: Int, length: Int) { }
override def contentRemoved(buffer: JEditBuffer,
start_line: Int, offset: Int, num_lines: Int, length: Int) { }
override def preContentInserted(buffer: JEditBuffer,
start_line: Int, offset: Int, num_lines: Int, length: Int) =
{
val text = buffer.getText(offset, length)
if (col == null)
col = new Text.Change(id(), offset, text, 0)
else if (col.start <= offset && offset <= col.start + col.added.length)
col = new Text.Change(col.id, col.start, col.added + text, col.removed)
else {
commit
col = new Text.Change(id(), offset, text, 0)
}
delay_commit
}
override def preContentRemoved(buffer: JEditBuffer,
start_line: Int, start: Int, num_lines: Int, removed: Int) =
{
if (col == null)
col = new Text.Change(id(), start, "", removed)
else if (col.start > start + removed || start > col.start + col.added.length) {
commit
col = new Text.Change(id(), start, "", removed)
}
else {
/* val offset = start - col.start
val diff = col.added.length - removed
val (added, add_removed) =
if (diff < offset)
(offset max 0, diff - (offset max 0))
else
(diff - (offset min 0), offset min 0)
col = new Text.Changed(start min col.start, added, col.removed - add_removed)*/
commit
col = new Text.Change(id(), start, "", removed)
}
delay_commit
}
override def bufferLoaded(buffer: JEditBuffer) { }
override def foldHandlerChanged(buffer: JEditBuffer) { }
override def foldLevelChanged(buffer: JEditBuffer, start_line: Int, end_line: Int) { }
override def transactionComplete(buffer: JEditBuffer) { }
}