+++ /dev/null
-/**
- * Jexer - Java Text User Interface
- *
- * License: LGPLv3 or later
- *
- * This module is licensed under the GNU Lesser General Public License
- * Version 3. Please see the file "COPYING" in this directory for more
- * information about the GNU Lesser General Public License Version 3.
- *
- * Copyright (C) 2015 Kevin Lamonte
- *
- * This program is free software; you can redistribute it and/or
- * modify it under the terms of the GNU Lesser General Public License
- * as published by the Free Software Foundation; either version 3 of
- * the License, or (at your option) any later version.
- *
- * This program is distributed in the hope that it will be useful, but
- * WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
- * General Public License for more details.
- *
- * You should have received a copy of the GNU Lesser General Public
- * License along with this program; if not, see
- * http://www.gnu.org/licenses/, or write to the Free Software
- * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA
- * 02110-1301 USA
- *
- * @author Kevin Lamonte [kevin.lamonte@gmail.com]
- * @version 1
- */
-package jexer;
-
-import java.io.InputStream;
-import java.io.IOException;
-import java.io.OutputStream;
-import java.io.UnsupportedEncodingException;
-import java.util.LinkedList;
-import java.util.List;
-import java.util.Map;
-
-import jexer.bits.Cell;
-import jexer.bits.CellAttributes;
-import jexer.event.TKeypressEvent;
-import jexer.event.TMouseEvent;
-import jexer.event.TResizeEvent;
-import jexer.tterminal.DisplayLine;
-import jexer.tterminal.ECMA48;
-import static jexer.TKeypress.*;
-
-/**
- * TTerminalWindow exposes a ECMA-48 / ANSI X3.64 style terminal in a window.
- */
-public class TTerminalWindow extends TWindow {
-
- /**
- * The emulator.
- */
- private ECMA48 emulator;
-
- /**
- * The Process created by the shell spawning constructor.
- */
- private Process shell;
-
- /**
- * Vertical scrollbar.
- */
- private TVScroller vScroller;
-
- /**
- * Public constructor spawns a shell.
- *
- * @param application TApplication that manages this window
- * @param x column relative to parent
- * @param y row relative to parent
- * @param flags mask of CENTERED, MODAL, or RESIZABLE
- */
- public TTerminalWindow(final TApplication application, final int x,
- final int y, final int flags) {
-
- super(application, "Terminal", x, y, 80 + 2, 24 + 2, flags);
-
- // Assume XTERM
- ECMA48.DeviceType deviceType = ECMA48.DeviceType.XTERM;
-
- try {
- String [] cmdShellWindows = {
- "cmd.exe"
- };
-
- // You cannot run a login shell in a bare Process interactively,
- // due to libc's behavior of buffering when stdin/stdout aren't a
- // tty. Use 'script' instead to run a shell in a pty.
- String [] cmdShell = {
- "script", "-fqe", "/dev/null"
- };
- // Spawn a shell and pass its I/O to the other constructor.
-
- ProcessBuilder pb;
- if (System.getProperty("os.name").startsWith("Windows")) {
- pb = new ProcessBuilder(cmdShellWindows);
- } else {
- pb = new ProcessBuilder(cmdShell);
- }
- Map<String, String> env = pb.environment();
- env.put("TERM", ECMA48.deviceTypeTerm(deviceType));
- env.put("LANG", ECMA48.deviceTypeLang(deviceType, "en"));
- env.put("COLUMNS", "80");
- env.put("LINES", "24");
- pb.redirectErrorStream(true);
- shell = pb.start();
- emulator = new ECMA48(deviceType, shell.getInputStream(),
- shell.getOutputStream());
- } catch (IOException e) {
- e.printStackTrace();
- }
-
- // Setup the scroll bars
- onResize(new TResizeEvent(TResizeEvent.Type.WIDGET, getWidth(),
- getHeight()));
- }
-
- /**
- * Public constructor.
- *
- * @param application TApplication that manages this window
- * @param x column relative to parent
- * @param y row relative to parent
- * @param flags mask of CENTERED, MODAL, or RESIZABLE
- * @param input an InputStream connected to the remote side. For type ==
- * XTERM, input is converted to a Reader with UTF-8 encoding.
- * @param output an OutputStream connected to the remote user. For type
- * == XTERM, output is converted to a Writer with UTF-8 encoding.
- * @throws UnsupportedEncodingException if an exception is thrown when
- * creating the InputStreamReader
- */
- public TTerminalWindow(final TApplication application, final int x,
- final int y, final int flags, final InputStream input,
- final OutputStream output) throws UnsupportedEncodingException {
-
- super(application, "Terminal", x, y, 80 + 2, 24 + 2, flags);
-
- emulator = new ECMA48(ECMA48.DeviceType.XTERM, input, output);
-
- // Setup the scroll bars
- onResize(new TResizeEvent(TResizeEvent.Type.WIDGET, getWidth(),
- getHeight()));
-
- }
-
- /**
- * Draw the display buffer.
- */
- @Override
- public void draw() {
- // Synchronize against the emulator so we don't stomp on its reader
- // thread.
- synchronized (emulator) {
-
- // Update the scroll bars
- reflow();
-
- // Draw the box using my superclass
- super.draw();
-
- List<DisplayLine> scrollback = emulator.getScrollbackBuffer();
- List<DisplayLine> display = emulator.getDisplayBuffer();
-
- // Put together the visible rows
- int visibleHeight = getHeight() - 2;
- int visibleBottom = scrollback.size() + display.size()
- + vScroller.getValue();
- assert (visibleBottom >= 0);
-
- List<DisplayLine> preceedingBlankLines = new LinkedList<DisplayLine>();
- int visibleTop = visibleBottom - visibleHeight;
- if (visibleTop < 0) {
- for (int i = visibleTop; i < 0; i++) {
- preceedingBlankLines.add(emulator.getBlankDisplayLine());
- }
- visibleTop = 0;
- }
- assert (visibleTop >= 0);
-
- List<DisplayLine> displayLines = new LinkedList<DisplayLine>();
- displayLines.addAll(scrollback);
- displayLines.addAll(display);
-
- List<DisplayLine> visibleLines = new LinkedList<DisplayLine>();
- visibleLines.addAll(preceedingBlankLines);
- visibleLines.addAll(displayLines.subList(visibleTop,
- visibleBottom));
-
- visibleHeight -= visibleLines.size();
- assert (visibleHeight >= 0);
-
- // Now draw the emulator screen
- int row = 1;
- for (DisplayLine line: visibleLines) {
- int widthMax = emulator.getWidth();
- if (line.isDoubleWidth()) {
- widthMax /= 2;
- }
- if (widthMax > getWidth() - 2) {
- widthMax = getWidth() - 2;
- }
- for (int i = 0; i < widthMax; i++) {
- Cell ch = line.charAt(i);
- Cell newCell = new Cell();
- newCell.setTo(ch);
- boolean reverse = line.isReverseColor() ^ ch.isReverse();
- newCell.setReverse(false);
- if (reverse) {
- newCell.setBackColor(ch.getForeColor());
- newCell.setForeColor(ch.getBackColor());
- }
- if (line.isDoubleWidth()) {
- getScreen().putCharXY((i * 2) + 1, row, newCell);
- getScreen().putCharXY((i * 2) + 2, row, ' ', newCell);
- } else {
- getScreen().putCharXY(i + 1, row, newCell);
- }
- }
- row++;
- if (row == getHeight() - 1) {
- // Don't overwrite the box edge
- break;
- }
- }
- CellAttributes background = new CellAttributes();
- // Fill in the blank lines on bottom
- for (int i = 0; i < visibleHeight; i++) {
- getScreen().hLineXY(1, i + row, getWidth() - 2, ' ',
- background);
- }
-
- } // synchronized (emulator)
-
- }
-
- /**
- * Handle window close.
- */
- @Override public void onClose() {
- if (shell != null) {
- shell.destroy();
- shell = null;
- } else {
- emulator.close();
- }
- }
-
- /**
- * Copy out variables from the emulator that TTerminal has to expose on
- * screen.
- */
- private void readEmulatorState() {
- // Synchronize against the emulator so we don't stomp on its reader
- // thread.
- synchronized (emulator) {
-
- setCursorX(emulator.getCursorX() + 1);
- setCursorY(emulator.getCursorY() + 1
- + (getHeight() - 2 - emulator.getHeight()));
- if (vScroller != null) {
- setCursorY(getCursorY() - vScroller.getValue());
- }
- setCursorVisible(emulator.isCursorVisible());
- if (getCursorX() > getWidth() - 2) {
- setCursorVisible(false);
- }
- if ((getCursorY() > getHeight() - 2) || (getCursorY() < 0)) {
- setCursorVisible(false);
- }
- if (emulator.getScreenTitle().length() > 0) {
- // Only update the title if the shell is still alive
- if (shell != null) {
- setTitle(emulator.getScreenTitle());
- }
- }
-
- // Check to see if the shell has died.
- if (!emulator.isReading() && (shell != null)) {
- try {
- int rc = shell.exitValue();
- // The emulator exited on its own, all is fine
- setTitle(String.format("%s [Completed - %d]",
- getTitle(), shell.exitValue()));
- shell = null;
- emulator.close();
- } catch (IllegalThreadStateException e) {
- // The emulator thread has exited, but the shell Process
- // hasn't figured that out yet. Do nothing, we will see
- // this in a future tick.
- }
- } else if (emulator.isReading() && (shell != null)) {
- // The shell might be dead, let's check
- try {
- int rc = shell.exitValue();
- // If we got here, the shell died.
- setTitle(String.format("%s [Completed - %d]",
- getTitle(), rc));
- shell = null;
- emulator.close();
- } catch (IllegalThreadStateException e) {
- // The shell is still running, do nothing.
- }
- }
-
- } // synchronized (emulator)
- }
-
- /**
- * Handle window/screen resize events.
- *
- * @param resize resize event
- */
- @Override
- public void onResize(final TResizeEvent resize) {
-
- // Synchronize against the emulator so we don't stomp on its reader
- // thread.
- synchronized (emulator) {
-
- if (resize.getType() == TResizeEvent.Type.WIDGET) {
- // Resize the scroll bars
- reflow();
-
- // Get out of scrollback
- vScroller.setValue(0);
- }
- return;
-
- } // synchronized (emulator)
- }
-
- /**
- * Resize scrollbars for a new width/height.
- */
- private void reflow() {
-
- // Synchronize against the emulator so we don't stomp on its reader
- // thread.
- synchronized (emulator) {
-
- // Pull cursor information
- readEmulatorState();
-
- // Vertical scrollbar
- if (vScroller == null) {
- vScroller = new TVScroller(this, getWidth() - 2, 0,
- getHeight() - 2);
- vScroller.setBottomValue(0);
- vScroller.setValue(0);
- } else {
- vScroller.setX(getWidth() - 2);
- vScroller.setHeight(getHeight() - 2);
- }
- vScroller.setTopValue(getHeight() - 2
- - (emulator.getScrollbackBuffer().size()
- + emulator.getDisplayBuffer().size()));
- vScroller.setBigChange(getHeight() - 2);
-
- } // synchronized (emulator)
- }
-
- /**
- * Check if a mouse press/release/motion event coordinate is over the
- * emulator.
- *
- * @param mouse a mouse-based event
- * @return whether or not the mouse is on the emulator
- */
- private final boolean mouseOnEmulator(final TMouseEvent mouse) {
-
- synchronized (emulator) {
- if (!emulator.isReading()) {
- return false;
- }
- }
-
- if ((mouse.getAbsoluteX() >= getAbsoluteX() + 1)
- && (mouse.getAbsoluteX() < getAbsoluteX() + getWidth() - 1)
- && (mouse.getAbsoluteY() >= getAbsoluteY() + 1)
- && (mouse.getAbsoluteY() < getAbsoluteY() + getHeight() - 1)
- ) {
- return true;
- }
- return false;
- }
-
- /**
- * Handle keystrokes.
- *
- * @param keypress keystroke event
- */
- @Override
- public void onKeypress(final TKeypressEvent keypress) {
-
- // Scrollback up/down
- if (keypress.equals(kbShiftPgUp)
- || keypress.equals(kbCtrlPgUp)
- || keypress.equals(kbAltPgUp)
- ) {
- vScroller.bigDecrement();
- return;
- }
- if (keypress.equals(kbShiftPgDn)
- || keypress.equals(kbCtrlPgDn)
- || keypress.equals(kbAltPgDn)
- ) {
- vScroller.bigIncrement();
- return;
- }
-
- // Synchronize against the emulator so we don't stomp on its reader
- // thread.
- synchronized (emulator) {
- if (emulator.isReading()) {
- // Get out of scrollback
- vScroller.setValue(0);
- emulator.keypress(keypress.getKey());
-
- // UGLY HACK TIME! cmd.exe needs CRLF, not just CR, so if
- // this is kBEnter then also send kbCtrlJ.
- if (System.getProperty("os.name").startsWith("Windows")) {
- if (keypress.equals(kbEnter)) {
- emulator.keypress(kbCtrlJ);
- }
- }
-
- readEmulatorState();
- return;
- }
- }
-
- // Process is closed, honor "normal" TUI keystrokes
- super.onKeypress(keypress);
- }
-
- /**
- * Handle mouse press events.
- *
- * @param mouse mouse button press event
- */
- @Override
- public void onMouseDown(final TMouseEvent mouse) {
- if (inWindowMove || inWindowResize) {
- // TWindow needs to deal with this.
- super.onMouseDown(mouse);
- return;
- }
-
- if (mouse.isMouseWheelUp()) {
- vScroller.decrement();
- return;
- }
- if (mouse.isMouseWheelDown()) {
- vScroller.increment();
- return;
- }
- if (mouseOnEmulator(mouse)) {
- synchronized (emulator) {
- mouse.setX(mouse.getX() - 1);
- mouse.setY(mouse.getY() - 1);
- emulator.mouse(mouse);
- readEmulatorState();
- return;
- }
- }
-
- // Emulator didn't consume it, pass it on
- super.onMouseDown(mouse);
- }
-
- /**
- * Handle mouse release events.
- *
- * @param mouse mouse button release event
- */
- @Override
- public void onMouseUp(final TMouseEvent mouse) {
- if (inWindowMove || inWindowResize) {
- // TWindow needs to deal with this.
- super.onMouseUp(mouse);
- return;
- }
-
- if (mouseOnEmulator(mouse)) {
- synchronized (emulator) {
- mouse.setX(mouse.getX() - 1);
- mouse.setY(mouse.getY() - 1);
- emulator.mouse(mouse);
- readEmulatorState();
- return;
- }
- }
-
- // Emulator didn't consume it, pass it on
- super.onMouseUp(mouse);
- }
-
- /**
- * Handle mouse motion events.
- *
- * @param mouse mouse motion event
- */
- @Override
- public void onMouseMotion(final TMouseEvent mouse) {
- if (inWindowMove || inWindowResize) {
- // TWindow needs to deal with this.
- super.onMouseMotion(mouse);
- return;
- }
-
- if (mouseOnEmulator(mouse)) {
- synchronized (emulator) {
- mouse.setX(mouse.getX() - 1);
- mouse.setY(mouse.getY() - 1);
- emulator.mouse(mouse);
- readEmulatorState();
- return;
- }
- }
-
- // Emulator didn't consume it, pass it on
- super.onMouseMotion(mouse);
- }
-
-}