/* Title: Tools/jEdit/src/completion_popup.scala
Author: Makarius
Completion popup.
*/
package isabelle.jedit
import isabelle._
import java.awt.{Color, Font, Point, BorderLayout, Dimension}
import java.awt.event.{InputEvent, KeyEvent, MouseEvent, MouseAdapter, FocusAdapter, FocusEvent}
import javax.swing.{JPanel, JComponent, JLayeredPane, SwingUtilities}
import javax.swing.border.LineBorder
import scala.swing.{ListView, ScrollPane}
import scala.swing.event.MouseClicked
import org.gjt.sp.jedit.{View, Debug}
import org.gjt.sp.jedit.textarea.JEditTextArea
object Completion_Popup
{
/* setup for jEdit text area */
object Text_Area
{
private val key = new Object
def apply(text_area: JEditTextArea): Option[Completion_Popup.Text_Area] =
text_area.getClientProperty(key) match {
case text_area_completion: Completion_Popup.Text_Area => Some(text_area_completion)
case _ => None
}
def exit(text_area: JEditTextArea)
{
Swing_Thread.require()
apply(text_area) match {
case None =>
case Some(text_area_completion) =>
text_area_completion.deactivate()
text_area.putClientProperty(key, null)
}
}
def init(text_area: JEditTextArea): Completion_Popup.Text_Area =
{
exit(text_area)
val text_area_completion = new Text_Area(text_area)
text_area.putClientProperty(key, text_area_completion)
text_area_completion.activate()
text_area_completion
}
def dismissed(text_area: JEditTextArea): Boolean =
{
Swing_Thread.require()
apply(text_area) match {
case Some(text_area_completion) => text_area_completion.dismissed()
case None => false
}
}
}
class Text_Area private(text_area: JEditTextArea)
{
private var completion_popup: Option[Completion_Popup] = None
/* completion action */
private def insert(item: Completion.Item)
{
Swing_Thread.require()
val buffer = text_area.getBuffer
val len = item.original.length
if (buffer.isEditable && len > 0) {
JEdit_Lib.buffer_edit(buffer) {
val caret = text_area.getCaretPosition
JEdit_Lib.try_get_text(buffer, Text.Range(caret - len, caret)) match {
case Some(text) if text == item.original =>
buffer.remove(caret - len, len)
buffer.insert(caret - len, item.replacement)
case _ =>
}
}
}
}
def action(immediate: Boolean = false, explicit: Boolean = false)
{
val view = text_area.getView
val layered = view.getLayeredPane
val buffer = text_area.getBuffer
val painter = text_area.getPainter
if (buffer.isEditable) {
Isabelle.mode_syntax(JEdit_Lib.buffer_mode(buffer)) match {
case Some(syntax) =>
val caret = text_area.getCaretPosition
val line = buffer.getLineOfOffset(caret)
val start = buffer.getLineStartOffset(line)
val text = buffer.getSegment(start, caret - start)
val history = PIDE.completion_history.value
val decode = Isabelle_Encoding.is_active(buffer)
syntax.completion.complete(history, decode, explicit, text) match {
case Some(result) =>
if (result.unique && result.items.head.immediate && immediate)
insert(result.items.head)
else {
val font =
painter.getFont.deriveFont(Rendering.font_size("jedit_popup_font_scale"))
val loc1 = text_area.offsetToXY(caret - result.original.length)
if (loc1 != null) {
val loc2 =
SwingUtilities.convertPoint(painter,
loc1.x, loc1.y + painter.getFontMetrics.getHeight, layered)
val completion =
new Completion_Popup(layered, loc2, font, result.items) {
override def complete(item: Completion.Item) {
PIDE.completion_history.update(item)
insert(item)
}
override def propagate(evt: KeyEvent) {
JEdit_Lib.propagate_key(view, evt)
input(evt)
}
override def refocus() { text_area.requestFocus }
}
completion_popup = Some(completion)
completion.show_popup()
}
}
case None =>
}
case None =>
}
}
}
/* input key events */
def input(evt: KeyEvent)
{
Swing_Thread.require()
if (PIDE.options.bool("jedit_completion")) {
if (!evt.isConsumed) {
dismissed()
if (evt.getKeyChar != '\b') {
val mod = evt.getModifiers
val special =
// cf. 5.1.0/jEdit/org/gjt/sp/jedit/gui/KeyEventWorkaround.java
(mod & InputEvent.CTRL_MASK) != 0 && (mod & InputEvent.ALT_MASK) == 0 ||
(mod & InputEvent.CTRL_MASK) == 0 && (mod & InputEvent.ALT_MASK) != 0 &&
!Debug.ALT_KEY_PRESSED_DISABLED ||
(mod & InputEvent.META_MASK) != 0
if (PIDE.options.seconds("jedit_completion_delay").is_zero && !special) {
input_delay.revoke()
action(immediate = PIDE.options.bool("jedit_completion_immediate"))
}
else input_delay.invoke()
}
}
}
}
private val input_delay =
Swing_Thread.delay_last(PIDE.options.seconds("jedit_completion_delay")) {
action()
}
/* dismiss popup */
def dismissed(): Boolean =
{
Swing_Thread.require()
completion_popup match {
case Some(completion) =>
completion.hide_popup()
completion_popup = None
true
case None =>
false
}
}
/* activation */
private val outer_key_listener =
JEdit_Lib.key_listener(key_typed = input _)
private def activate()
{
text_area.addKeyListener(outer_key_listener)
}
private def deactivate()
{
dismissed()
text_area.removeKeyListener(outer_key_listener)
}
}
}
class Completion_Popup private(
layered: JLayeredPane,
location: Point,
font: Font,
items: List[Completion.Item]) extends JPanel(new BorderLayout)
{
completion =>
Swing_Thread.require()
require(!items.isEmpty)
val multi = items.length > 1
/* actions */
def complete(item: Completion.Item) { }
def propagate(evt: KeyEvent) { }
def refocus() { }
/* list view */
private val list_view = new ListView(items)
list_view.font = font
list_view.selection.intervalMode = ListView.IntervalMode.Single
list_view.peer.setFocusTraversalKeysEnabled(false)
list_view.peer.setVisibleRowCount(items.length min 8)
list_view.peer.setSelectedIndex(0)
for (cond <-
List(JComponent.WHEN_FOCUSED,
JComponent.WHEN_ANCESTOR_OF_FOCUSED_COMPONENT,
JComponent.WHEN_IN_FOCUSED_WINDOW)) list_view.peer.setInputMap(cond, null)
private def complete_selected(): Boolean =
{
list_view.selection.items.toList match {
case item :: _ => complete(item); true
case _ => false
}
}
private def move_items(n: Int)
{
val i = list_view.peer.getSelectedIndex
val j = ((i + n) min (items.length - 1)) max 0
if (i != j) {
list_view.peer.setSelectedIndex(j)
list_view.peer.ensureIndexIsVisible(j)
}
}
private def move_pages(n: Int)
{
val page_size = list_view.peer.getVisibleRowCount - 1
move_items(page_size * n)
}
/* event handling */
private val inner_key_listener =
JEdit_Lib.key_listener(
key_pressed = (e: KeyEvent) =>
{
if (!e.isConsumed) {
e.getKeyCode match {
case KeyEvent.VK_TAB =>
if (complete_selected()) e.consume
hide_popup()
case KeyEvent.VK_ESCAPE =>
hide_popup()
e.consume
case KeyEvent.VK_UP | KeyEvent.VK_KP_UP if multi =>
move_items(-1); e.consume
case KeyEvent.VK_DOWN | KeyEvent.VK_KP_DOWN if multi =>
move_items(1); e.consume
case KeyEvent.VK_PAGE_UP if multi =>
move_pages(-1); e.consume
case KeyEvent.VK_PAGE_DOWN if multi =>
move_pages(1); e.consume
case _ =>
if (e.isActionKey || e.isAltDown || e.isMetaDown || e.isControlDown)
hide_popup()
}
}
propagate(e)
},
key_typed = propagate _
)
list_view.peer.addKeyListener(inner_key_listener)
list_view.peer.addMouseListener(new MouseAdapter {
override def mouseClicked(e: MouseEvent) {
if (complete_selected()) e.consume
hide_popup()
}
})
list_view.peer.addFocusListener(new FocusAdapter {
override def focusLost(e: FocusEvent) { hide_popup() }
})
/* main content */
override def getFocusTraversalKeysEnabled = false
completion.setBorder(new LineBorder(Color.BLACK))
completion.add((new ScrollPane(list_view)).peer.asInstanceOf[JComponent])
/* popup */
private val popup =
{
val screen = JEdit_Lib.screen_location(layered, location)
val size =
{
val geometry = JEdit_Lib.window_geometry(completion, completion)
val bounds = Rendering.popup_bounds
val w = geometry.width min (screen.bounds.width * bounds).toInt min layered.getWidth
val h = geometry.height min (screen.bounds.height * bounds).toInt min layered.getHeight
new Dimension(w, h)
}
new Popup(layered, completion, screen.relative(layered, size), size)
}
private def show_popup()
{
popup.show
list_view.requestFocus
}
private def hide_popup()
{
val had_focus = list_view.peer.isFocusOwner
popup.hide
if (had_focus) refocus()
}
}