misc cleanup
[fanfix.git] / src / jexer / TTerminalWindow.java
1 /*
2 * Jexer - Java Text User Interface
3 *
4 * The MIT License (MIT)
5 *
6 * Copyright (C) 2019 Kevin Lamonte
7 *
8 * Permission is hereby granted, free of charge, to any person obtaining a
9 * copy of this software and associated documentation files (the "Software"),
10 * to deal in the Software without restriction, including without limitation
11 * the rights to use, copy, modify, merge, publish, distribute, sublicense,
12 * and/or sell copies of the Software, and to permit persons to whom the
13 * Software is furnished to do so, subject to the following conditions:
14 *
15 * The above copyright notice and this permission notice shall be included in
16 * all copies or substantial portions of the Software.
17 *
18 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
19 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
20 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
21 * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
22 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
23 * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
24 * DEALINGS IN THE SOFTWARE.
25 *
26 * @author Kevin Lamonte [kevin.lamonte@gmail.com]
27 * @version 1
28 */
29 package jexer;
30
31 import java.io.IOException;
32 import java.lang.reflect.Field;
33 import java.text.MessageFormat;
34 import java.util.ArrayList;
35 import java.util.List;
36 import java.util.Map;
37 import java.util.ResourceBundle;
38
39 import jexer.bits.Cell;
40 import jexer.bits.CellAttributes;
41 import jexer.event.TKeypressEvent;
42 import jexer.event.TMenuEvent;
43 import jexer.event.TMouseEvent;
44 import jexer.event.TResizeEvent;
45 import jexer.menu.TMenu;
46 import jexer.tterminal.DisplayLine;
47 import jexer.tterminal.DisplayListener;
48 import jexer.tterminal.ECMA48;
49 import static jexer.TKeypress.*;
50
51 /**
52 * TTerminalWindow exposes a ECMA-48 / ANSI X3.64 style terminal in a window.
53 */
54 public class TTerminalWindow extends TScrollableWindow
55 implements DisplayListener {
56
57
58 /**
59 * Translated strings.
60 */
61 private static final ResourceBundle i18n = ResourceBundle.getBundle(TTerminalWindow.class.getName());
62
63 // ------------------------------------------------------------------------
64 // Variables --------------------------------------------------------------
65 // ------------------------------------------------------------------------
66
67 /**
68 * The emulator.
69 */
70 private ECMA48 emulator;
71
72 /**
73 * The Process created by the shell spawning constructor.
74 */
75 private Process shell;
76
77 /**
78 * If true, we are using the ptypipe utility to support dynamic window
79 * resizing. ptypipe is available at
80 * https://gitlab.com/klamonte/ptypipe .
81 */
82 private boolean ptypipe = false;
83
84 /**
85 * If true, close the window when the shell exits.
86 */
87 private boolean closeOnExit = false;
88
89 // ------------------------------------------------------------------------
90 // Constructors -----------------------------------------------------------
91 // ------------------------------------------------------------------------
92
93 /**
94 * Public constructor spawns a custom command line.
95 *
96 * @param application TApplication that manages this window
97 * @param x column relative to parent
98 * @param y row relative to parent
99 * @param commandLine the command line to execute
100 */
101 public TTerminalWindow(final TApplication application, final int x,
102 final int y, final String commandLine) {
103
104 this(application, x, y, RESIZABLE, commandLine.split("\\s+"),
105 System.getProperty("jexer.TTerminal.closeOnExit",
106 "false").equals("true"));
107 }
108
109 /**
110 * Public constructor spawns a custom command line.
111 *
112 * @param application TApplication that manages this window
113 * @param x column relative to parent
114 * @param y row relative to parent
115 * @param commandLine the command line to execute
116 * @param closeOnExit if true, close the window when the command exits
117 */
118 public TTerminalWindow(final TApplication application, final int x,
119 final int y, final String commandLine, final boolean closeOnExit) {
120
121 this(application, x, y, RESIZABLE, commandLine.split("\\s+"),
122 closeOnExit);
123 }
124
125 /**
126 * Public constructor spawns a custom command line.
127 *
128 * @param application TApplication that manages this window
129 * @param x column relative to parent
130 * @param y row relative to parent
131 * @param flags mask of CENTERED, MODAL, or RESIZABLE
132 * @param command the command line to execute
133 */
134 public TTerminalWindow(final TApplication application, final int x,
135 final int y, final int flags, final String [] command) {
136
137 this(application, x, y, flags, command,
138 System.getProperty("jexer.TTerminal.closeOnExit",
139 "false").equals("true"));
140 }
141
142 /**
143 * Public constructor spawns a custom command line.
144 *
145 * @param application TApplication that manages this window
146 * @param x column relative to parent
147 * @param y row relative to parent
148 * @param flags mask of CENTERED, MODAL, or RESIZABLE
149 * @param command the command line to execute
150 * @param closeOnExit if true, close the window when the command exits
151 */
152 public TTerminalWindow(final TApplication application, final int x,
153 final int y, final int flags, final String [] command,
154 final boolean closeOnExit) {
155
156 super(application, i18n.getString("windowTitle"), x, y,
157 80 + 2, 24 + 2, flags);
158
159 this.closeOnExit = closeOnExit;
160
161 String [] fullCommand;
162
163 // Spawn a shell and pass its I/O to the other constructor.
164 if ((System.getProperty("jexer.TTerminal.ptypipe") != null)
165 && (System.getProperty("jexer.TTerminal.ptypipe").
166 equals("true"))
167 ) {
168 ptypipe = true;
169 fullCommand = new String[command.length + 1];
170 fullCommand[0] = "ptypipe";
171 System.arraycopy(command, 0, fullCommand, 1, command.length);
172 } else if (System.getProperty("os.name").startsWith("Windows")) {
173 fullCommand = new String[3];
174 fullCommand[0] = "cmd";
175 fullCommand[1] = "/c";
176 fullCommand[2] = stringArrayToString(command);
177 } else if (System.getProperty("os.name").startsWith("Mac")) {
178 fullCommand = new String[6];
179 fullCommand[0] = "script";
180 fullCommand[1] = "-q";
181 fullCommand[2] = "-F";
182 fullCommand[3] = "/dev/null";
183 fullCommand[4] = "-c";
184 fullCommand[5] = stringArrayToString(command);
185 } else {
186 // Default: behave like Linux
187 fullCommand = new String[5];
188 fullCommand[0] = "script";
189 fullCommand[1] = "-fqe";
190 fullCommand[2] = "/dev/null";
191 fullCommand[3] = "-c";
192 fullCommand[4] = stringArrayToString(command);
193 }
194 spawnShell(fullCommand);
195 }
196
197 /**
198 * Public constructor spawns a shell.
199 *
200 * @param application TApplication that manages this window
201 * @param x column relative to parent
202 * @param y row relative to parent
203 * @param flags mask of CENTERED, MODAL, or RESIZABLE
204 */
205 public TTerminalWindow(final TApplication application, final int x,
206 final int y, final int flags) {
207
208 this(application, x, y, flags,
209 System.getProperty("jexer.TTerminal.closeOnExit",
210 "false").equals("true"));
211
212 }
213
214 /**
215 * Public constructor spawns a shell.
216 *
217 * @param application TApplication that manages this window
218 * @param x column relative to parent
219 * @param y row relative to parent
220 * @param flags mask of CENTERED, MODAL, or RESIZABLE
221 * @param closeOnExit if true, close the window when the shell exits
222 */
223 public TTerminalWindow(final TApplication application, final int x,
224 final int y, final int flags, final boolean closeOnExit) {
225
226 super(application, i18n.getString("windowTitle"), x, y,
227 80 + 2, 24 + 2, flags);
228
229 this.closeOnExit = closeOnExit;
230
231 String cmdShellWindows = "cmd.exe";
232
233 // You cannot run a login shell in a bare Process interactively, due
234 // to libc's behavior of buffering when stdin/stdout aren't a tty.
235 // Use 'script' instead to run a shell in a pty. And because BSD and
236 // GNU differ on the '-f' vs '-F' flags, we need two different
237 // commands. Lovely.
238 String cmdShellGNU = "script -fqe /dev/null";
239 String cmdShellBSD = "script -q -F /dev/null";
240
241 // ptypipe is another solution that permits dynamic window resizing.
242 String cmdShellPtypipe = "ptypipe /bin/bash --login";
243
244 // Spawn a shell and pass its I/O to the other constructor.
245 if ((System.getProperty("jexer.TTerminal.ptypipe") != null)
246 && (System.getProperty("jexer.TTerminal.ptypipe").
247 equals("true"))
248 ) {
249 ptypipe = true;
250 spawnShell(cmdShellPtypipe.split("\\s+"));
251 } else if (System.getProperty("os.name").startsWith("Windows")) {
252 spawnShell(cmdShellWindows.split("\\s+"));
253 } else if (System.getProperty("os.name").startsWith("Mac")) {
254 spawnShell(cmdShellBSD.split("\\s+"));
255 } else if (System.getProperty("os.name").startsWith("Linux")) {
256 spawnShell(cmdShellGNU.split("\\s+"));
257 } else {
258 // When all else fails, assume GNU.
259 spawnShell(cmdShellGNU.split("\\s+"));
260 }
261 }
262
263 // ------------------------------------------------------------------------
264 // TScrollableWindow ------------------------------------------------------
265 // ------------------------------------------------------------------------
266
267 /**
268 * Draw the display buffer.
269 */
270 @Override
271 public void draw() {
272 // Synchronize against the emulator so we don't stomp on its reader
273 // thread.
274 synchronized (emulator) {
275
276 // Update the scroll bars
277 reflowData();
278
279 // Draw the box using my superclass
280 super.draw();
281
282 List<DisplayLine> scrollback = emulator.getScrollbackBuffer();
283 List<DisplayLine> display = emulator.getDisplayBuffer();
284
285 // Put together the visible rows
286 int visibleHeight = getHeight() - 2;
287 int visibleBottom = scrollback.size() + display.size()
288 + getVerticalValue();
289 assert (visibleBottom >= 0);
290
291 List<DisplayLine> preceedingBlankLines = new ArrayList<DisplayLine>();
292 int visibleTop = visibleBottom - visibleHeight;
293 if (visibleTop < 0) {
294 for (int i = visibleTop; i < 0; i++) {
295 preceedingBlankLines.add(emulator.getBlankDisplayLine());
296 }
297 visibleTop = 0;
298 }
299 assert (visibleTop >= 0);
300
301 List<DisplayLine> displayLines = new ArrayList<DisplayLine>();
302 displayLines.addAll(scrollback);
303 displayLines.addAll(display);
304
305 List<DisplayLine> visibleLines = new ArrayList<DisplayLine>();
306 visibleLines.addAll(preceedingBlankLines);
307 visibleLines.addAll(displayLines.subList(visibleTop,
308 visibleBottom));
309
310 visibleHeight -= visibleLines.size();
311 assert (visibleHeight >= 0);
312
313 // Now draw the emulator screen
314 int row = 1;
315 for (DisplayLine line: visibleLines) {
316 int widthMax = emulator.getWidth();
317 if (line.isDoubleWidth()) {
318 widthMax /= 2;
319 }
320 if (widthMax > getWidth() - 2) {
321 widthMax = getWidth() - 2;
322 }
323 for (int i = 0; i < widthMax; i++) {
324 Cell ch = line.charAt(i);
325 Cell newCell = new Cell();
326 newCell.setTo(ch);
327 boolean reverse = line.isReverseColor() ^ ch.isReverse();
328 newCell.setReverse(false);
329 if (reverse) {
330 if (ch.getForeColorRGB() < 0) {
331 newCell.setBackColor(ch.getForeColor());
332 newCell.setBackColorRGB(-1);
333 } else {
334 newCell.setBackColorRGB(ch.getForeColorRGB());
335 }
336 if (ch.getBackColorRGB() < 0) {
337 newCell.setForeColor(ch.getBackColor());
338 newCell.setForeColorRGB(-1);
339 } else {
340 newCell.setForeColorRGB(ch.getBackColorRGB());
341 }
342 }
343 if (line.isDoubleWidth()) {
344 putCharXY((i * 2) + 1, row, newCell);
345 putCharXY((i * 2) + 2, row, ' ', newCell);
346 } else {
347 putCharXY(i + 1, row, newCell);
348 }
349 }
350 row++;
351 if (row == getHeight() - 1) {
352 // Don't overwrite the box edge
353 break;
354 }
355 }
356 CellAttributes background = new CellAttributes();
357 // Fill in the blank lines on bottom
358 for (int i = 0; i < visibleHeight; i++) {
359 hLineXY(1, i + row, getWidth() - 2, ' ', background);
360 }
361
362 } // synchronized (emulator)
363
364 }
365
366 /**
367 * Handle window close.
368 */
369 @Override
370 public void onClose() {
371 emulator.close();
372 if (shell != null) {
373 terminateShellChildProcess();
374 shell.destroy();
375 shell = null;
376 }
377 }
378
379 /**
380 * Handle window/screen resize events.
381 *
382 * @param resize resize event
383 */
384 @Override
385 public void onResize(final TResizeEvent resize) {
386
387 // Synchronize against the emulator so we don't stomp on its reader
388 // thread.
389 synchronized (emulator) {
390
391 if (resize.getType() == TResizeEvent.Type.WIDGET) {
392 // Resize the scroll bars
393 reflowData();
394 placeScrollbars();
395
396 // Get out of scrollback
397 setVerticalValue(0);
398
399 if (ptypipe) {
400 emulator.setWidth(getWidth() - 2);
401 emulator.setHeight(getHeight() - 2);
402
403 emulator.writeRemote("\033[8;" + (getHeight() - 2) + ";" +
404 (getWidth() - 2) + "t");
405 }
406 }
407 return;
408
409 } // synchronized (emulator)
410 }
411
412 /**
413 * Resize scrollbars for a new width/height.
414 */
415 @Override
416 public void reflowData() {
417
418 // Synchronize against the emulator so we don't stomp on its reader
419 // thread.
420 synchronized (emulator) {
421
422 // Pull cursor information
423 readEmulatorState();
424
425 // Vertical scrollbar
426 setTopValue(getHeight() - 2
427 - (emulator.getScrollbackBuffer().size()
428 + emulator.getDisplayBuffer().size()));
429 setVerticalBigChange(getHeight() - 2);
430
431 } // synchronized (emulator)
432 }
433
434 /**
435 * Handle keystrokes.
436 *
437 * @param keypress keystroke event
438 */
439 @Override
440 public void onKeypress(final TKeypressEvent keypress) {
441
442 // Scrollback up/down
443 if (keypress.equals(kbShiftPgUp)
444 || keypress.equals(kbCtrlPgUp)
445 || keypress.equals(kbAltPgUp)
446 ) {
447 bigVerticalDecrement();
448 return;
449 }
450 if (keypress.equals(kbShiftPgDn)
451 || keypress.equals(kbCtrlPgDn)
452 || keypress.equals(kbAltPgDn)
453 ) {
454 bigVerticalIncrement();
455 return;
456 }
457
458 // Synchronize against the emulator so we don't stomp on its reader
459 // thread.
460 synchronized (emulator) {
461 if (emulator.isReading()) {
462 // Get out of scrollback
463 setVerticalValue(0);
464 emulator.keypress(keypress.getKey());
465
466 // UGLY HACK TIME! cmd.exe needs CRLF, not just CR, so if
467 // this is kBEnter then also send kbCtrlJ.
468 if (System.getProperty("os.name").startsWith("Windows")) {
469 if (keypress.equals(kbEnter)) {
470 emulator.keypress(kbCtrlJ);
471 }
472 }
473
474 readEmulatorState();
475 return;
476 }
477 }
478
479 // Process is closed, honor "normal" TUI keystrokes
480 super.onKeypress(keypress);
481 }
482
483 /**
484 * Handle mouse press events.
485 *
486 * @param mouse mouse button press event
487 */
488 @Override
489 public void onMouseDown(final TMouseEvent mouse) {
490 if (inWindowMove || inWindowResize) {
491 // TWindow needs to deal with this.
492 super.onMouseDown(mouse);
493 return;
494 }
495
496 if (mouse.isMouseWheelUp()) {
497 verticalDecrement();
498 return;
499 }
500 if (mouse.isMouseWheelDown()) {
501 verticalIncrement();
502 return;
503 }
504 if (mouseOnEmulator(mouse)) {
505 synchronized (emulator) {
506 mouse.setX(mouse.getX() - 1);
507 mouse.setY(mouse.getY() - 1);
508 emulator.mouse(mouse);
509 readEmulatorState();
510 return;
511 }
512 }
513
514 // Emulator didn't consume it, pass it on
515 super.onMouseDown(mouse);
516 }
517
518 /**
519 * Handle mouse release events.
520 *
521 * @param mouse mouse button release event
522 */
523 @Override
524 public void onMouseUp(final TMouseEvent mouse) {
525 if (inWindowMove || inWindowResize) {
526 // TWindow needs to deal with this.
527 super.onMouseUp(mouse);
528 return;
529 }
530
531 if (mouseOnEmulator(mouse)) {
532 synchronized (emulator) {
533 mouse.setX(mouse.getX() - 1);
534 mouse.setY(mouse.getY() - 1);
535 emulator.mouse(mouse);
536 readEmulatorState();
537 return;
538 }
539 }
540
541 // Emulator didn't consume it, pass it on
542 super.onMouseUp(mouse);
543 }
544
545 /**
546 * Handle mouse motion events.
547 *
548 * @param mouse mouse motion event
549 */
550 @Override
551 public void onMouseMotion(final TMouseEvent mouse) {
552 if (inWindowMove || inWindowResize) {
553 // TWindow needs to deal with this.
554 super.onMouseMotion(mouse);
555 return;
556 }
557
558 if (mouseOnEmulator(mouse)) {
559 synchronized (emulator) {
560 mouse.setX(mouse.getX() - 1);
561 mouse.setY(mouse.getY() - 1);
562 emulator.mouse(mouse);
563 readEmulatorState();
564 return;
565 }
566 }
567
568 // Emulator didn't consume it, pass it on
569 super.onMouseMotion(mouse);
570 }
571
572 // ------------------------------------------------------------------------
573 // TTerminalWindow --------------------------------------------------------
574 // ------------------------------------------------------------------------
575
576 /**
577 * Claim the keystrokes the emulator will need.
578 */
579 private void addShortcutKeys() {
580 addShortcutKeypress(kbCtrlA);
581 addShortcutKeypress(kbCtrlB);
582 addShortcutKeypress(kbCtrlC);
583 addShortcutKeypress(kbCtrlD);
584 addShortcutKeypress(kbCtrlE);
585 addShortcutKeypress(kbCtrlF);
586 addShortcutKeypress(kbCtrlG);
587 addShortcutKeypress(kbCtrlH);
588 addShortcutKeypress(kbCtrlU);
589 addShortcutKeypress(kbCtrlJ);
590 addShortcutKeypress(kbCtrlK);
591 addShortcutKeypress(kbCtrlL);
592 addShortcutKeypress(kbCtrlM);
593 addShortcutKeypress(kbCtrlN);
594 addShortcutKeypress(kbCtrlO);
595 addShortcutKeypress(kbCtrlP);
596 addShortcutKeypress(kbCtrlQ);
597 addShortcutKeypress(kbCtrlR);
598 addShortcutKeypress(kbCtrlS);
599 addShortcutKeypress(kbCtrlT);
600 addShortcutKeypress(kbCtrlU);
601 addShortcutKeypress(kbCtrlV);
602 addShortcutKeypress(kbCtrlW);
603 addShortcutKeypress(kbCtrlX);
604 addShortcutKeypress(kbCtrlY);
605 addShortcutKeypress(kbCtrlZ);
606 addShortcutKeypress(kbF1);
607 addShortcutKeypress(kbF2);
608 addShortcutKeypress(kbF3);
609 addShortcutKeypress(kbF4);
610 addShortcutKeypress(kbF5);
611 addShortcutKeypress(kbF6);
612 addShortcutKeypress(kbF7);
613 addShortcutKeypress(kbF8);
614 addShortcutKeypress(kbF9);
615 addShortcutKeypress(kbF10);
616 addShortcutKeypress(kbF11);
617 addShortcutKeypress(kbF12);
618 addShortcutKeypress(kbAltA);
619 addShortcutKeypress(kbAltB);
620 addShortcutKeypress(kbAltC);
621 addShortcutKeypress(kbAltD);
622 addShortcutKeypress(kbAltE);
623 addShortcutKeypress(kbAltF);
624 addShortcutKeypress(kbAltG);
625 addShortcutKeypress(kbAltH);
626 addShortcutKeypress(kbAltU);
627 addShortcutKeypress(kbAltJ);
628 addShortcutKeypress(kbAltK);
629 addShortcutKeypress(kbAltL);
630 addShortcutKeypress(kbAltM);
631 addShortcutKeypress(kbAltN);
632 addShortcutKeypress(kbAltO);
633 addShortcutKeypress(kbAltP);
634 addShortcutKeypress(kbAltQ);
635 addShortcutKeypress(kbAltR);
636 addShortcutKeypress(kbAltS);
637 addShortcutKeypress(kbAltT);
638 addShortcutKeypress(kbAltU);
639 addShortcutKeypress(kbAltV);
640 addShortcutKeypress(kbAltW);
641 addShortcutKeypress(kbAltX);
642 addShortcutKeypress(kbAltY);
643 addShortcutKeypress(kbAltZ);
644 }
645
646 /**
647 * Convert a string array to a whitespace-separated string.
648 *
649 * @param array the string array
650 * @return a single string
651 */
652 private String stringArrayToString(final String [] array) {
653 StringBuilder sb = new StringBuilder(array[0].length());
654 for (int i = 0; i < array.length; i++) {
655 sb.append(array[i]);
656 if (i < array.length - 1) {
657 sb.append(' ');
658 }
659 }
660 return sb.toString();
661 }
662
663 /**
664 * Spawn the shell.
665 *
666 * @param command the command line to execute
667 */
668 private void spawnShell(final String [] command) {
669
670 /*
671 System.err.printf("spawnShell(): '%s'\n",
672 stringArrayToString(command));
673 */
674
675 vScroller = new TVScroller(this, getWidth() - 2, 0, getHeight() - 2);
676 setBottomValue(0);
677
678 // Assume XTERM
679 ECMA48.DeviceType deviceType = ECMA48.DeviceType.XTERM;
680
681 try {
682 ProcessBuilder pb = new ProcessBuilder(command);
683 Map<String, String> env = pb.environment();
684 env.put("TERM", ECMA48.deviceTypeTerm(deviceType));
685 env.put("LANG", ECMA48.deviceTypeLang(deviceType, "en"));
686 env.put("COLUMNS", "80");
687 env.put("LINES", "24");
688 pb.redirectErrorStream(true);
689 shell = pb.start();
690 emulator = new ECMA48(deviceType, shell.getInputStream(),
691 shell.getOutputStream(), this);
692 } catch (IOException e) {
693 messageBox(i18n.getString("errorLaunchingShellTitle"),
694 MessageFormat.format(i18n.getString("errorLaunchingShellText"),
695 e.getMessage()));
696 }
697
698 // Setup the scroll bars
699 onResize(new TResizeEvent(TResizeEvent.Type.WIDGET, getWidth(),
700 getHeight()));
701
702 // Claim the keystrokes the emulator will need.
703 addShortcutKeys();
704
705 // Add shortcut text
706 newStatusBar(i18n.getString("statusBarRunning"));
707 }
708
709 /**
710 * Terminate the child of the 'script' process used on POSIX. This may
711 * or may not work.
712 */
713 private void terminateShellChildProcess() {
714 int pid = -1;
715 if (shell.getClass().getName().equals("java.lang.UNIXProcess")) {
716 /* get the PID on unix/linux systems */
717 try {
718 Field field = shell.getClass().getDeclaredField("pid");
719 field.setAccessible(true);
720 pid = field.getInt(shell);
721 } catch (Throwable e) {
722 // SQUASH, this didn't work. Just bail out quietly.
723 return;
724 }
725 }
726 if (pid != -1) {
727 // shell.destroy() works successfully at killing this side of
728 // 'script'. But we need to make sure the other side (child
729 // process) is also killed.
730 String [] cmdKillIt = {
731 "pkill", "-P", Integer.toString(pid)
732 };
733 try {
734 Runtime.getRuntime().exec(cmdKillIt);
735 } catch (Throwable e) {
736 // SQUASH, this didn't work. Just bail out quietly.
737 return;
738 }
739 }
740 }
741
742 /**
743 * Called by emulator when fresh data has come in.
744 */
745 public void displayChanged() {
746 getApplication().postEvent(new TMenuEvent(TMenu.MID_REPAINT));
747 }
748
749 /**
750 * Function to call to obtain the display width.
751 *
752 * @return the number of columns in the display
753 */
754 public int getDisplayWidth() {
755 if (ptypipe) {
756 return getWidth() - 2;
757 }
758 return 80;
759 }
760
761 /**
762 * Function to call to obtain the display height.
763 *
764 * @return the number of rows in the display
765 */
766 public int getDisplayHeight() {
767 if (ptypipe) {
768 return getHeight() - 2;
769 }
770 return 24;
771 }
772
773 /**
774 * Hook for subclasses to be notified of the shell termination.
775 */
776 public void onShellExit() {
777 if (closeOnExit) {
778 close();
779 }
780 getApplication().postEvent(new TMenuEvent(TMenu.MID_REPAINT));
781 }
782
783 /**
784 * Copy out variables from the emulator that TTerminal has to expose on
785 * screen.
786 */
787 private void readEmulatorState() {
788 // Synchronize against the emulator so we don't stomp on its reader
789 // thread.
790 synchronized (emulator) {
791 setHiddenMouse(emulator.hasHiddenMousePointer());
792
793 setCursorX(emulator.getCursorX() + 1);
794 setCursorY(emulator.getCursorY() + 1
795 + (getHeight() - 2 - emulator.getHeight())
796 - getVerticalValue());
797 setCursorVisible(emulator.isCursorVisible());
798 if (getCursorX() > getWidth() - 2) {
799 setCursorVisible(false);
800 }
801 if ((getCursorY() > getHeight() - 2) || (getCursorY() < 0)) {
802 setCursorVisible(false);
803 }
804 if (emulator.getScreenTitle().length() > 0) {
805 // Only update the title if the shell is still alive
806 if (shell != null) {
807 setTitle(emulator.getScreenTitle());
808 }
809 }
810
811 // Check to see if the shell has died.
812 if (!emulator.isReading() && (shell != null)) {
813 try {
814 int rc = shell.exitValue();
815 // The emulator exited on its own, all is fine
816 setTitle(MessageFormat.format(i18n.
817 getString("windowTitleCompleted"), getTitle(), rc));
818 shell = null;
819 emulator.close();
820 clearShortcutKeypresses();
821 statusBar.setText(MessageFormat.format(i18n.
822 getString("statusBarCompleted"), rc));
823 onShellExit();
824 } catch (IllegalThreadStateException e) {
825 // The emulator thread has exited, but the shell Process
826 // hasn't figured that out yet. Do nothing, we will see
827 // this in a future tick.
828 }
829 } else if (emulator.isReading() && (shell != null)) {
830 // The shell might be dead, let's check
831 try {
832 int rc = shell.exitValue();
833 // If we got here, the shell died.
834 setTitle(MessageFormat.format(i18n.
835 getString("windowTitleCompleted"), getTitle(), rc));
836 shell = null;
837 emulator.close();
838 clearShortcutKeypresses();
839 statusBar.setText(MessageFormat.format(i18n.
840 getString("statusBarCompleted"), rc));
841 onShellExit();
842 } catch (IllegalThreadStateException e) {
843 // The shell is still running, do nothing.
844 }
845 }
846
847 } // synchronized (emulator)
848 }
849
850 /**
851 * Check if a mouse press/release/motion event coordinate is over the
852 * emulator.
853 *
854 * @param mouse a mouse-based event
855 * @return whether or not the mouse is on the emulator
856 */
857 private boolean mouseOnEmulator(final TMouseEvent mouse) {
858
859 synchronized (emulator) {
860 if (!emulator.isReading()) {
861 return false;
862 }
863 }
864
865 if ((mouse.getAbsoluteX() >= getAbsoluteX() + 1)
866 && (mouse.getAbsoluteX() < getAbsoluteX() + getWidth() - 1)
867 && (mouse.getAbsoluteY() >= getAbsoluteY() + 1)
868 && (mouse.getAbsoluteY() < getAbsoluteY() + getHeight() - 1)
869 ) {
870 return true;
871 }
872 return false;
873 }
874
875 }