--- /dev/null
+/*
+ * Jexer - Java Text User Interface
+ *
+ * The MIT License (MIT)
+ *
+ * Copyright (C) 2019 Kevin Lamonte
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a
+ * copy of this software and associated documentation files (the "Software"),
+ * to deal in the Software without restriction, including without limitation
+ * the rights to use, copy, modify, merge, publish, distribute, sublicense,
+ * and/or sell copies of the Software, and to permit persons to whom the
+ * Software is furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in
+ * all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
+ * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
+ * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
+ * DEALINGS IN THE SOFTWARE.
+ *
+ * @author Kevin Lamonte [kevin.lamonte@gmail.com]
+ * @version 1
+ */
+package jexer.tterminal;
+
+import java.awt.Graphics2D;
+import java.awt.image.BufferedImage;
+import java.io.BufferedOutputStream;
+import java.io.CharArrayWriter;
+import java.io.InputStream;
+import java.io.InputStreamReader;
+import java.io.IOException;
+import java.io.OutputStream;
+import java.io.OutputStreamWriter;
+import java.io.PrintWriter;
+import java.io.Reader;
+import java.io.UnsupportedEncodingException;
+import java.io.Writer;
+import java.util.ArrayList;
+import java.util.Collections;
+import java.util.HashMap;
+import java.util.List;
+
+import jexer.TKeypress;
+import jexer.backend.GlyphMaker;
+import jexer.bits.Color;
+import jexer.bits.Cell;
+import jexer.bits.CellAttributes;
+import jexer.bits.StringUtils;
+import jexer.event.TInputEvent;
+import jexer.event.TKeypressEvent;
+import jexer.event.TMouseEvent;
+import jexer.io.ReadTimeoutException;
+import jexer.io.TimeoutInputStream;
+import static jexer.TKeypress.*;
+
+/**
+ * This implements a complex ECMA-48/ISO 6429/ANSI X3.64 type console,
+ * including a scrollback buffer.
+ *
+ * <p>
+ * It currently implements VT100, VT102, VT220, and XTERM with the following
+ * caveats:
+ *
+ * <p>
+ * - The vttest scenario for VT220 8-bit controls (11.1.2.3) reports a
+ * failure with XTERM. This is due to vttest failing to decode the UTF-8
+ * stream.
+ *
+ * <p>
+ * - Smooth scrolling, printing, keyboard locking, keyboard leds, and tests
+ * from VT100 are not supported.
+ *
+ * <p>
+ * - User-defined keys (DECUDK), downloadable fonts (DECDLD), and VT100/ANSI
+ * compatibility mode (DECSCL) from VT220 are not supported. (Also,
+ * because DECSCL is not supported, it will fail the last part of the
+ * vttest "Test of VT52 mode" if DeviceType is set to VT220.)
+ *
+ * <p>
+ * - Numeric/application keys from the number pad are not supported because
+ * they are not exposed from the TKeypress API.
+ *
+ * <p>
+ * - VT52 HOLD SCREEN mode is not supported.
+ *
+ * <p>
+ * - In VT52 graphics mode, the 3/, 5/, and 7/ characters (fraction
+ * numerators) are not rendered correctly.
+ *
+ * <p>
+ * - All data meant for the 'printer' (CSI Pc ? i) is discarded.
+ */
+public class ECMA48 implements Runnable {
+
+ // ------------------------------------------------------------------------
+ // Constants --------------------------------------------------------------
+ // ------------------------------------------------------------------------
+
+ /**
+ * The emulator can emulate several kinds of terminals.
+ */
+ public enum DeviceType {
+ /**
+ * DEC VT100 but also including the three VT102 functions.
+ */
+ VT100,
+
+ /**
+ * DEC VT102.
+ */
+ VT102,
+
+ /**
+ * DEC VT220.
+ */
+ VT220,
+
+ /**
+ * A subset of xterm.
+ */
+ XTERM
+ }
+
+ /**
+ * Parser character scan states.
+ */
+ private enum ScanState {
+ GROUND,
+ ESCAPE,
+ ESCAPE_INTERMEDIATE,
+ CSI_ENTRY,
+ CSI_PARAM,
+ CSI_INTERMEDIATE,
+ CSI_IGNORE,
+ DCS_ENTRY,
+ DCS_INTERMEDIATE,
+ DCS_PARAM,
+ DCS_PASSTHROUGH,
+ DCS_IGNORE,
+ DCS_SIXEL,
+ SOSPMAPC_STRING,
+ OSC_STRING,
+ VT52_DIRECT_CURSOR_ADDRESS
+ }
+
+ /**
+ * The selected number pad mode (DECKPAM, DECKPNM). We record this, but
+ * can't really use it in keypress() because we do not see number pad
+ * events from TKeypress.
+ */
+ private enum KeypadMode {
+ Application,
+ Numeric
+ }
+
+ /**
+ * Arrow keys can emit three different sequences (DECCKM or VT52
+ * submode).
+ */
+ private enum ArrowKeyMode {
+ VT52,
+ ANSI,
+ VT100
+ }
+
+ /**
+ * Available character sets for GL, GR, G0, G1, G2, G3.
+ */
+ private enum CharacterSet {
+ US,
+ UK,
+ DRAWING,
+ ROM,
+ ROM_SPECIAL,
+ VT52_GRAPHICS,
+ DEC_SUPPLEMENTAL,
+ NRC_DUTCH,
+ NRC_FINNISH,
+ NRC_FRENCH,
+ NRC_FRENCH_CA,
+ NRC_GERMAN,
+ NRC_ITALIAN,
+ NRC_NORWEGIAN,
+ NRC_SPANISH,
+ NRC_SWEDISH,
+ NRC_SWISS
+ }
+
+ /**
+ * Single-shift states used by the C1 control characters SS2 (0x8E) and
+ * SS3 (0x8F).
+ */
+ private enum Singleshift {
+ NONE,
+ SS2,
+ SS3
+ }
+
+ /**
+ * VT220+ lockshift states.
+ */
+ private enum LockshiftMode {
+ NONE,
+ G1_GR,
+ G2_GR,
+ G2_GL,
+ G3_GR,
+ G3_GL
+ }
+
+ /**
+ * XTERM mouse reporting protocols.
+ */
+ public enum MouseProtocol {
+ OFF,
+ X10,
+ NORMAL,
+ BUTTONEVENT,
+ ANYEVENT
+ }
+
+ /**
+ * XTERM mouse reporting encodings.
+ */
+ private enum MouseEncoding {
+ X10,
+ UTF8,
+ SGR
+ }
+
+ // ------------------------------------------------------------------------
+ // Variables --------------------------------------------------------------
+ // ------------------------------------------------------------------------
+
+ /**
+ * The enclosing listening object.
+ */
+ private DisplayListener displayListener;
+
+ /**
+ * When true, the reader thread is expected to exit.
+ */
+ private volatile boolean stopReaderThread = false;
+
+ /**
+ * The reader thread.
+ */
+ private Thread readerThread = null;
+
+ /**
+ * The type of emulator to be.
+ */
+ private DeviceType type = DeviceType.VT102;
+
+ /**
+ * The scrollback buffer characters + attributes.
+ */
+ private volatile ArrayList<DisplayLine> scrollback;
+
+ /**
+ * The raw display buffer characters + attributes.
+ */
+ private volatile ArrayList<DisplayLine> display;
+
+ /**
+ * The maximum number of lines in the scrollback buffer.
+ */
+ private int maxScrollback = 10000;
+
+ /**
+ * The terminal's input. For type == XTERM, this is an InputStreamReader
+ * with UTF-8 encoding.
+ */
+ private Reader input;
+
+ /**
+ * The terminal's raw InputStream. This is used for type != XTERM.
+ */
+ private volatile TimeoutInputStream inputStream;
+
+ /**
+ * The terminal's output. For type == XTERM, this wraps an
+ * OutputStreamWriter with UTF-8 encoding.
+ */
+ private Writer output;
+
+ /**
+ * The terminal's raw OutputStream. This is used for type != XTERM.
+ */
+ private OutputStream outputStream;
+
+ /**
+ * Current scanning state.
+ */
+ private ScanState scanState;
+
+ /**
+ * Which mouse protocol is active.
+ */
+ private MouseProtocol mouseProtocol = MouseProtocol.OFF;
+
+ /**
+ * Which mouse encoding is active.
+ */
+ private MouseEncoding mouseEncoding = MouseEncoding.X10;
+
+ /**
+ * A terminal may request that the mouse pointer be hidden using a
+ * Privacy Message containing either "hideMousePointer" or
+ * "showMousePointer". This is currently only used within Jexer by
+ * TTerminalWindow so that only the bottom-most instance of nested
+ * Jexer's draws the mouse within its application window.
+ */
+ private boolean hideMousePointer = false;
+
+ /**
+ * Physical display width. We start at 80x24, but the user can resize us
+ * bigger/smaller.
+ */
+ private int width;
+
+ /**
+ * Physical display height. We start at 80x24, but the user can resize
+ * us bigger/smaller.
+ */
+ private int height;
+
+ /**
+ * Top margin of the scrolling region.
+ */
+ private int scrollRegionTop;
+
+ /**
+ * Bottom margin of the scrolling region.
+ */
+ private int scrollRegionBottom;
+
+ /**
+ * Right margin column number. This can be selected by the remote side
+ * to be 80/132 (rightMargin values 79/131), or it can be (width - 1).
+ */
+ private int rightMargin;
+
+ /**
+ * Last character printed.
+ */
+ private int repCh;
+
+ /**
+ * VT100-style line wrapping: a character is placed in column 80 (or
+ * 132), but the line does NOT wrap until another character is written to
+ * column 1 of the next line, after which the cursor moves to column 2.
+ */
+ private boolean wrapLineFlag;
+
+ /**
+ * VT220 single shift flag.
+ */
+ private Singleshift singleshift = Singleshift.NONE;
+
+ /**
+ * true = insert characters, false = overwrite.
+ */
+ private boolean insertMode = false;
+
+ /**
+ * VT52 mode as selected by DECANM. True means VT52, false means
+ * ANSI. Default is ANSI.
+ */
+ private boolean vt52Mode = false;
+
+ /**
+ * Visible cursor (DECTCEM).
+ */
+ private boolean cursorVisible = true;
+
+ /**
+ * Screen title as set by the xterm OSC sequence. Lots of applications
+ * send a screenTitle regardless of whether it is an xterm client or not.
+ */
+ private String screenTitle = "";
+
+ /**
+ * Parameter characters being collected.
+ */
+ private List<Integer> csiParams;
+
+ /**
+ * Non-csi collect buffer.
+ */
+ private StringBuilder collectBuffer;
+
+ /**
+ * When true, use the G1 character set.
+ */
+ private boolean shiftOut = false;
+
+ /**
+ * Horizontal tab stop locations.
+ */
+ private List<Integer> tabStops;
+
+ /**
+ * S8C1T. True means 8bit controls, false means 7bit controls.
+ */
+ private boolean s8c1t = false;
+
+ /**
+ * Printer mode. True means send all output to printer, which discards
+ * it.
+ */
+ private boolean printerControllerMode = false;
+
+ /**
+ * LMN line mode. If true, linefeed() puts the cursor on the first
+ * column of the next line. If false, linefeed() puts the cursor one
+ * line down on the current line. The default is false.
+ */
+ private boolean newLineMode = false;
+
+ /**
+ * Whether arrow keys send ANSI, VT100, or VT52 sequences.
+ */
+ private ArrowKeyMode arrowKeyMode;
+
+ /**
+ * Whether number pad keys send VT100 or VT52, application or numeric
+ * sequences.
+ */
+ @SuppressWarnings("unused")
+ private KeypadMode keypadMode;
+
+ /**
+ * When true, the terminal is in 132-column mode (DECCOLM).
+ */
+ private boolean columns132 = false;
+
+ /**
+ * true = reverse video. Set by DECSCNM.
+ */
+ private boolean reverseVideo = false;
+
+ /**
+ * false = echo characters locally.
+ */
+ private boolean fullDuplex = true;
+
+ /**
+ * The current terminal state.
+ */
+ private SaveableState currentState;
+
+ /**
+ * The last saved terminal state.
+ */
+ private SaveableState savedState;
+
+ /**
+ * The 88- or 256-color support RGB colors.
+ */
+ private List<Integer> colors88;
+
+ /**
+ * Sixel collection buffer.
+ */
+ private StringBuilder sixelParseBuffer;
+
+ /**
+ * Sixel shared palette.
+ */
+ private HashMap<Integer, java.awt.Color> sixelPalette;
+
+ /**
+ * The width of a character cell in pixels.
+ */
+ private int textWidth = 16;
+
+ /**
+ * The height of a character cell in pixels.
+ */
+ private int textHeight = 20;
+
+ /**
+ * The last used height of a character cell in pixels, only used for
+ * full-width chars.
+ */
+ private int lastTextHeight = -1;
+
+ /**
+ * The glyph drawer for full-width chars.
+ */
+ private GlyphMaker glyphMaker = null;
+
+ /**
+ * Input queue for keystrokes and mouse events to send to the remote
+ * side.
+ */
+ private ArrayList<TInputEvent> userQueue = new ArrayList<TInputEvent>();
+
+ /**
+ * DECSC/DECRC save/restore a subset of the total state. This class
+ * encapsulates those specific flags/modes.
+ */
+ private class SaveableState {
+
+ /**
+ * When true, cursor positions are relative to the scrolling region.
+ */
+ public boolean originMode = false;
+
+ /**
+ * The current editing X position.
+ */
+ public int cursorX = 0;
+
+ /**
+ * The current editing Y position.
+ */
+ public int cursorY = 0;
+
+ /**
+ * Which character set is currently selected in G0.
+ */
+ public CharacterSet g0Charset = CharacterSet.US;
+
+ /**
+ * Which character set is currently selected in G1.
+ */
+ public CharacterSet g1Charset = CharacterSet.DRAWING;
+
+ /**
+ * Which character set is currently selected in G2.
+ */
+ public CharacterSet g2Charset = CharacterSet.US;
+
+ /**
+ * Which character set is currently selected in G3.
+ */
+ public CharacterSet g3Charset = CharacterSet.US;
+
+ /**
+ * Which character set is currently selected in GR.
+ */
+ public CharacterSet grCharset = CharacterSet.DRAWING;
+
+ /**
+ * The current drawing attributes.
+ */
+ public CellAttributes attr;
+
+ /**
+ * GL lockshift mode.
+ */
+ public LockshiftMode glLockshift = LockshiftMode.NONE;
+
+ /**
+ * GR lockshift mode.
+ */
+ public LockshiftMode grLockshift = LockshiftMode.NONE;
+
+ /**
+ * Line wrap.
+ */
+ public boolean lineWrap = true;
+
+ /**
+ * Reset to defaults.
+ */
+ public void reset() {
+ originMode = false;
+ cursorX = 0;
+ cursorY = 0;
+ g0Charset = CharacterSet.US;
+ g1Charset = CharacterSet.DRAWING;
+ g2Charset = CharacterSet.US;
+ g3Charset = CharacterSet.US;
+ grCharset = CharacterSet.DRAWING;
+ attr = new CellAttributes();
+ glLockshift = LockshiftMode.NONE;
+ grLockshift = LockshiftMode.NONE;
+ lineWrap = true;
+ }
+
+ /**
+ * Copy attributes from another instance.
+ *
+ * @param that the other instance to match
+ */
+ public void setTo(final SaveableState that) {
+ this.originMode = that.originMode;
+ this.cursorX = that.cursorX;
+ this.cursorY = that.cursorY;
+ this.g0Charset = that.g0Charset;
+ this.g1Charset = that.g1Charset;
+ this.g2Charset = that.g2Charset;
+ this.g3Charset = that.g3Charset;
+ this.grCharset = that.grCharset;
+ this.attr = new CellAttributes();
+ this.attr.setTo(that.attr);
+ this.glLockshift = that.glLockshift;
+ this.grLockshift = that.grLockshift;
+ this.lineWrap = that.lineWrap;
+ }
+
+ /**
+ * Public constructor.
+ */
+ public SaveableState() {
+ reset();
+ }
+ }
+
+ // ------------------------------------------------------------------------
+ // Constructors -----------------------------------------------------------
+ // ------------------------------------------------------------------------
+
+ /**
+ * Public constructor.
+ *
+ * @param type one of the DeviceType constants to select VT100, VT102,
+ * VT220, or XTERM
+ * @param inputStream an InputStream connected to the remote side. For
+ * type == XTERM, inputStream is converted to a Reader with UTF-8
+ * encoding.
+ * @param outputStream an OutputStream connected to the remote user. For
+ * type == XTERM, outputStream is converted to a Writer with UTF-8
+ * encoding.
+ * @param displayListener a callback to the outer display, or null for
+ * default VT100 behavior
+ * @throws UnsupportedEncodingException if an exception is thrown when
+ * creating the InputStreamReader
+ */
+ public ECMA48(final DeviceType type, final InputStream inputStream,
+ final OutputStream outputStream, final DisplayListener displayListener)
+ throws UnsupportedEncodingException {
+
+ assert (inputStream != null);
+ assert (outputStream != null);
+
+ csiParams = new ArrayList<Integer>();
+ tabStops = new ArrayList<Integer>();
+ scrollback = new ArrayList<DisplayLine>();
+ display = new ArrayList<DisplayLine>();
+
+ this.type = type;
+ if (inputStream instanceof TimeoutInputStream) {
+ this.inputStream = (TimeoutInputStream)inputStream;
+ } else {
+ this.inputStream = new TimeoutInputStream(inputStream, 2000);
+ }
+ if (type == DeviceType.XTERM) {
+ this.input = new InputStreamReader(this.inputStream, "UTF-8");
+ this.output = new OutputStreamWriter(new
+ BufferedOutputStream(outputStream), "UTF-8");
+ this.outputStream = null;
+ } else {
+ this.output = null;
+ this.outputStream = new BufferedOutputStream(outputStream);
+ }
+ this.displayListener = displayListener;
+
+ reset();
+ for (int i = 0; i < height; i++) {
+ display.add(new DisplayLine(currentState.attr));
+ }
+
+ // Spin up the input reader
+ readerThread = new Thread(this);
+ readerThread.start();
+ }
+
+ // ------------------------------------------------------------------------
+ // Runnable ---------------------------------------------------------------
+ // ------------------------------------------------------------------------
+
+ /**
+ * Read function runs on a separate thread.
+ */
+ public final void run() {
+ boolean utf8 = false;
+ boolean done = false;
+
+ if (type == DeviceType.XTERM) {
+ utf8 = true;
+ }
+
+ // available() will often return > 1, so we need to read in chunks to
+ // stay caught up.
+ char [] readBufferUTF8 = null;
+ byte [] readBuffer = null;
+ if (utf8) {
+ readBufferUTF8 = new char[2048];
+ } else {
+ readBuffer = new byte[2048];
+ }
+
+ while (!done && !stopReaderThread) {
+ synchronized (userQueue) {
+ while (userQueue.size() > 0) {
+ handleUserEvent(userQueue.remove(0));
+ }
+ }
+
+ try {
+ int n = inputStream.available();
+
+ // System.err.printf("available() %d\n", n); System.err.flush();
+ if (utf8) {
+ if (readBufferUTF8.length < n) {
+ // The buffer wasn't big enough, make it huger
+ int newSizeHalf = Math.max(readBufferUTF8.length,
+ n);
+
+ readBufferUTF8 = new char[newSizeHalf * 2];
+ }
+ } else {
+ if (readBuffer.length < n) {
+ // The buffer wasn't big enough, make it huger
+ int newSizeHalf = Math.max(readBuffer.length, n);
+ readBuffer = new byte[newSizeHalf * 2];
+ }
+ }
+ if (n == 0) {
+ try {
+ Thread.sleep(10);
+ } catch (InterruptedException e) {
+ // SQUASH
+ }
+ continue;
+ }
+
+ int rc = -1;
+ try {
+ if (utf8) {
+ rc = input.read(readBufferUTF8, 0,
+ readBufferUTF8.length);
+ } else {
+ rc = inputStream.read(readBuffer, 0,
+ readBuffer.length);
+ }
+ } catch (ReadTimeoutException e) {
+ rc = 0;
+ }
+
+ // System.err.printf("read() %d\n", rc); System.err.flush();
+ if (rc == -1) {
+ // This is EOF
+ done = true;
+ } else {
+ // Don't step on UI events
+ synchronized (this) {
+ if (utf8) {
+ for (int i = 0; i < rc;) {
+ int ch = Character.codePointAt(readBufferUTF8,
+ i);
+ i += Character.charCount(ch);
+ consume(ch);
+ }
+ } else {
+ for (int i = 0; i < rc; i++) {
+ consume(readBuffer[i]);
+ }
+ }
+ }
+ // Permit my enclosing UI to know that I updated.
+ if (displayListener != null) {
+ displayListener.displayChanged();
+ }
+ }
+ // System.err.println("end while loop"); System.err.flush();
+ } catch (IOException e) {
+ done = true;
+
+ // This is an unusual case. We want to see the stack trace,
+ // but it is related to the spawned process rather than the
+ // actual UI. We will generate the stack trace, and consume
+ // it as though it was emitted by the shell.
+ CharArrayWriter writer= new CharArrayWriter();
+ // Send a ST and RIS to clear the emulator state.
+ try {
+ writer.write("\033\\\033c");
+ writer.write("\n-----------------------------------\n");
+ e.printStackTrace(new PrintWriter(writer));
+ writer.write("\n-----------------------------------\n");
+ } catch (IOException e2) {
+ // SQUASH
+ }
+ char [] stackTrace = writer.toCharArray();
+ for (int i = 0; i < stackTrace.length; i++) {
+ if (stackTrace[i] == '\n') {
+ consume('\r');
+ }
+ consume(stackTrace[i]);
+ }
+ }
+
+ } // while ((done == false) && (stopReaderThread == false))
+
+ // Let the rest of the world know that I am done.
+ stopReaderThread = true;
+
+ try {
+ inputStream.cancelRead();
+ inputStream.close();
+ inputStream = null;
+ } catch (IOException e) {
+ // SQUASH
+ }
+ try {
+ input.close();
+ input = null;
+ } catch (IOException e) {
+ // SQUASH
+ }
+
+ // Permit my enclosing UI to know that I updated.
+ if (displayListener != null) {
+ displayListener.displayChanged();
+ }
+
+ // System.err.println("*** run() exiting..."); System.err.flush();
+ }
+
+ // ------------------------------------------------------------------------
+ // ECMA48 -----------------------------------------------------------------
+ // ------------------------------------------------------------------------
+
+ /**
+ * Process keyboard and mouse events from the user.
+ *
+ * @param event the input event to consume
+ */
+ private void handleUserEvent(final TInputEvent event) {
+ if (event instanceof TKeypressEvent) {
+ keypress(((TKeypressEvent) event).getKey());
+ }
+ if (event instanceof TMouseEvent) {
+ mouse((TMouseEvent) event);
+ }
+ }
+
+ /**
+ * Add a keyboard and mouse event from the user to the queue.
+ *
+ * @param event the input event to consume
+ */
+ public void addUserEvent(final TInputEvent event) {
+ synchronized (userQueue) {
+ userQueue.add(event);
+ }
+ }
+
+ /**
+ * Return the proper primary Device Attributes string.
+ *
+ * @return string to send to remote side that is appropriate for the
+ * this.type
+ */
+ private String deviceTypeResponse() {
+ switch (type) {
+ case VT100:
+ // "I am a VT100 with advanced video option" (often VT102)
+ return "\033[?1;2c";
+
+ case VT102:
+ // "I am a VT102"
+ return "\033[?6c";
+
+ case VT220:
+ case XTERM:
+ // "I am a VT220" - 7 bit version
+ if (!s8c1t) {
+ return "\033[?62;1;6;9;4;22c";
+ // return "\033[?62;1;6;9;4;22;444c";
+ }
+ // "I am a VT220" - 8 bit version
+ return "\u009b?62;1;6;9;4;22c";
+ // return "\u009b?62;1;6;9;4;22;444c";
+ default:
+ throw new IllegalArgumentException("Invalid device type: " + type);
+ }
+ }
+
+ /**
+ * Return the proper TERM environment variable for this device type.
+ *
+ * @param deviceType DeviceType.VT100, DeviceType, XTERM, etc.
+ * @return "vt100", "xterm", etc.
+ */
+ public static String deviceTypeTerm(final DeviceType deviceType) {
+ switch (deviceType) {
+ case VT100:
+ return "vt100";
+
+ case VT102:
+ return "vt102";
+
+ case VT220:
+ return "vt220";
+
+ case XTERM:
+ return "xterm";
+
+ default:
+ throw new IllegalArgumentException("Invalid device type: "
+ + deviceType);
+ }
+ }
+
+ /**
+ * Return the proper LANG for this device type. Only XTERM devices know
+ * about UTF-8, the others are defined by their standard to be either
+ * 7-bit or 8-bit characters only.
+ *
+ * @param deviceType DeviceType.VT100, DeviceType, XTERM, etc.
+ * @param baseLang a base language without UTF-8 flag such as "C" or
+ * "en_US"
+ * @return "en_US", "en_US.UTF-8", etc.
+ */
+ public static String deviceTypeLang(final DeviceType deviceType,
+ final String baseLang) {
+
+ switch (deviceType) {
+
+ case VT100:
+ case VT102:
+ case VT220:
+ return baseLang;
+
+ case XTERM:
+ return baseLang + ".UTF-8";
+
+ default:
+ throw new IllegalArgumentException("Invalid device type: "
+ + deviceType);
+ }
+ }
+
+ /**
+ * Write a string directly to the remote side.
+ *
+ * @param str string to send
+ */
+ public void writeRemote(final String str) {
+ if (stopReaderThread) {
+ // Reader hit EOF, bail out now.
+ close();
+ return;
+ }
+
+ // System.err.printf("writeRemote() '%s'\n", str);
+
+ switch (type) {
+ case VT100:
+ case VT102:
+ case VT220:
+ if (outputStream == null) {
+ return;
+ }
+ try {
+ outputStream.flush();
+ for (int i = 0; i < str.length(); i++) {
+ outputStream.write(str.charAt(i));
+ }
+ outputStream.flush();
+ } catch (IOException e) {
+ // Assume EOF
+ close();
+ }
+ break;
+ case XTERM:
+ if (output == null) {
+ return;
+ }
+ try {
+ output.flush();
+ output.write(str);
+ output.flush();
+ } catch (IOException e) {
+ // Assume EOF
+ close();
+ }
+ break;
+ default:
+ throw new IllegalArgumentException("Invalid device type: " + type);
+ }
+ }
+
+ /**
+ * Close the input and output streams and stop the reader thread. Note
+ * that it is safe to call this multiple times.
+ */
+ public final void close() {
+
+ // Tell the reader thread to stop looking at input. It will close
+ // the input streams.
+ if (stopReaderThread == false) {
+ stopReaderThread = true;
+ try {
+ readerThread.join(1000);
+ } catch (InterruptedException e) {
+ // SQUASH
+ }
+ }
+
+ // Now close the output stream.
+ switch (type) {
+ case VT100:
+ case VT102:
+ case VT220:
+ if (outputStream != null) {
+ try {
+ outputStream.close();
+ } catch (IOException e) {
+ // SQUASH
+ }
+ outputStream = null;
+ }
+ break;
+ case XTERM:
+ if (outputStream != null) {
+ try {
+ outputStream.close();
+ } catch (IOException e) {
+ // SQUASH
+ }
+ outputStream = null;
+ }
+ if (output != null) {
+ try {
+ output.close();
+ } catch (IOException e) {
+ // SQUASH
+ }
+ output = null;
+ }
+ break;
+ default:
+ throw new IllegalArgumentException("Invalid device type: " +
+ type);
+ }
+ }
+
+ /**
+ * See if the reader thread is still running.
+ *
+ * @return if true, we are still connected to / reading from the remote
+ * side
+ */
+ public final boolean isReading() {
+ return (!stopReaderThread);
+ }
+
+ /**
+ * Obtain a new blank display line for an external user
+ * (e.g. TTerminalWindow).
+ *
+ * @return new blank line
+ */
+ public final DisplayLine getBlankDisplayLine() {
+ return new DisplayLine(currentState.attr);
+ }
+
+ /**
+ * Get the scrollback buffer.
+ *
+ * @return the scrollback buffer
+ */
+ public final List<DisplayLine> getScrollbackBuffer() {
+ return scrollback;
+ }
+
+ /**
+ * Get the display buffer.
+ *
+ * @return the display buffer
+ */
+ public final List<DisplayLine> getDisplayBuffer() {
+ return display;
+ }
+
+ /**
+ * Get the visible display + scrollback buffer, offset by a specified
+ * number of rows from the bottom.
+ *
+ * @param visibleHeight the total height of the display to show
+ * @param scrollBottom the number of rows from the bottom to scroll back
+ * @return a copy of the display + scrollback buffers
+ */
+ public final List<DisplayLine> getVisibleDisplay(final int visibleHeight,
+ final int scrollBottom) {
+
+ assert (visibleHeight >= 0);
+ assert (scrollBottom >= 0);
+
+ int visibleBottom = scrollback.size() + display.size() - scrollBottom;
+
+ List<DisplayLine> preceedingBlankLines = new ArrayList<DisplayLine>();
+ int visibleTop = visibleBottom - visibleHeight;
+ if (visibleTop < 0) {
+ for (int i = visibleTop; i < 0; i++) {
+ preceedingBlankLines.add(getBlankDisplayLine());
+ }
+ visibleTop = 0;
+ }
+ assert (visibleTop >= 0);
+
+ List<DisplayLine> displayLines = new ArrayList<DisplayLine>();
+ displayLines.addAll(scrollback);
+ displayLines.addAll(display);
+
+ List<DisplayLine> visibleLines = new ArrayList<DisplayLine>();
+ visibleLines.addAll(preceedingBlankLines);
+ visibleLines.addAll(displayLines.subList(visibleTop, visibleBottom));
+
+ // Fill in the blank lines on bottom
+ int bottomBlankLines = visibleHeight - visibleLines.size();
+ assert (bottomBlankLines >= 0);
+ for (int i = 0; i < bottomBlankLines; i++) {
+ visibleLines.add(getBlankDisplayLine());
+ }
+
+ return copyBuffer(visibleLines);
+ }
+
+ /**
+ * Copy a display buffer.
+ *
+ * @param buffer the buffer to copy
+ * @return a deep copy of the buffer's data
+ */
+ private List<DisplayLine> copyBuffer(final List<DisplayLine> buffer) {
+ ArrayList<DisplayLine> result = new ArrayList<DisplayLine>(buffer.size());
+ for (DisplayLine line: buffer) {
+ result.add(new DisplayLine(line));
+ }
+ return result;
+ }
+
+ /**
+ * Get the display width.
+ *
+ * @return the width (usually 80 or 132)
+ */
+ public final int getWidth() {
+ return width;
+ }
+
+ /**
+ * Set the display width.
+ *
+ * @param width the new width
+ */
+ public final synchronized void setWidth(final int width) {
+ this.width = width;
+ rightMargin = width - 1;
+ if (currentState.cursorX >= width) {
+ currentState.cursorX = width - 1;
+ }
+ if (savedState.cursorX >= width) {
+ savedState.cursorX = width - 1;
+ }
+ }
+
+ /**
+ * Get the display height.
+ *
+ * @return the height (usually 24)
+ */
+ public final int getHeight() {
+ return height;
+ }
+
+ /**
+ * Set the display height.
+ *
+ * @param height the new height
+ */
+ public final synchronized void setHeight(final int height) {
+ int delta = height - this.height;
+ this.height = height;
+ scrollRegionBottom += delta;
+ if (scrollRegionBottom < 0) {
+ scrollRegionBottom = height;
+ }
+ if (scrollRegionTop >= scrollRegionBottom) {
+ scrollRegionTop = 0;
+ }
+ if (currentState.cursorY >= height) {
+ currentState.cursorY = height - 1;
+ }
+ if (savedState.cursorY >= height) {
+ savedState.cursorY = height - 1;
+ }
+ while (display.size() < height) {
+ DisplayLine line = new DisplayLine(currentState.attr);
+ line.setReverseColor(reverseVideo);
+ display.add(line);
+ }
+ while (display.size() > height) {
+ scrollback.add(display.remove(0));
+ }
+ }
+
+ /**
+ * Get visible cursor flag.
+ *
+ * @return if true, the cursor is visible
+ */
+ public final boolean isCursorVisible() {
+ return cursorVisible;
+ }
+
+ /**
+ * Get the screen title as set by the xterm OSC sequence. Lots of
+ * applications send a screenTitle regardless of whether it is an xterm
+ * client or not.
+ *
+ * @return screen title
+ */
+ public final String getScreenTitle() {
+ return screenTitle;
+ }
+
+ /**
+ * Get 132 columns value.
+ *
+ * @return if true, the terminal is in 132 column mode
+ */
+ public final boolean isColumns132() {
+ return columns132;
+ }
+
+ /**
+ * Clear the CSI parameters and flags.
+ */
+ private void toGround() {
+ csiParams.clear();
+ collectBuffer = new StringBuilder(8);
+ scanState = ScanState.GROUND;
+ }
+
+ /**
+ * Reset the tab stops list.
+ */
+ private void resetTabStops() {
+ tabStops.clear();
+ for (int i = 0; (i * 8) <= rightMargin; i++) {
+ tabStops.add(Integer.valueOf(i * 8));
+ }
+ }
+
+ /**
+ * Reset the 88- or 256-colors.
+ */
+ private void resetColors() {
+ colors88 = new ArrayList<Integer>(256);
+ for (int i = 0; i < 256; i++) {
+ colors88.add(0);
+ }
+
+ // Set default system colors.
+ colors88.set(0, 0x00000000);
+ colors88.set(1, 0x00a80000);
+ colors88.set(2, 0x0000a800);
+ colors88.set(3, 0x00a85400);
+ colors88.set(4, 0x000000a8);
+ colors88.set(5, 0x00a800a8);
+ colors88.set(6, 0x0000a8a8);
+ colors88.set(7, 0x00a8a8a8);
+
+ colors88.set(8, 0x00545454);
+ colors88.set(9, 0x00fc5454);
+ colors88.set(10, 0x0054fc54);
+ colors88.set(11, 0x00fcfc54);
+ colors88.set(12, 0x005454fc);
+ colors88.set(13, 0x00fc54fc);
+ colors88.set(14, 0x0054fcfc);
+ colors88.set(15, 0x00fcfcfc);
+ }
+
+ /**
+ * Get the RGB value of one of the indexed colors.
+ *
+ * @param index the color index
+ * @return the RGB value
+ */
+ private int get88Color(final int index) {
+ // System.err.print("get88Color: " + index);
+ if ((index < 0) || (index > colors88.size())) {
+ // System.err.println(" -- UNKNOWN");
+ return 0;
+ }
+ // System.err.printf(" %08x\n", colors88.get(index));
+ return colors88.get(index);
+ }
+
+ /**
+ * Set one of the indexed colors to a color specification.
+ *
+ * @param index the color index
+ * @param spec the specification, typically something like "rgb:aa/bb/cc"
+ */
+ private void set88Color(final int index, final String spec) {
+ // System.err.println("set88Color: " + index + " '" + spec + "'");
+
+ if ((index < 0) || (index > colors88.size())) {
+ return;
+ }
+ if (spec.startsWith("rgb:")) {
+ String [] rgbTokens = spec.substring(4).split("/");
+ if (rgbTokens.length == 3) {
+ try {
+ int rgb = (Integer.parseInt(rgbTokens[0], 16) << 16);
+ rgb |= Integer.parseInt(rgbTokens[1], 16) << 8;
+ rgb |= Integer.parseInt(rgbTokens[2], 16);
+ // System.err.printf(" set to %08x\n", rgb);
+ colors88.set(index, rgb);
+ } catch (NumberFormatException e) {
+ // SQUASH
+ }
+ }
+ return;
+ }
+
+ if (spec.toLowerCase().equals("black")) {
+ colors88.set(index, 0x00000000);
+ } else if (spec.toLowerCase().equals("red")) {
+ colors88.set(index, 0x00a80000);
+ } else if (spec.toLowerCase().equals("green")) {
+ colors88.set(index, 0x0000a800);
+ } else if (spec.toLowerCase().equals("yellow")) {
+ colors88.set(index, 0x00a85400);
+ } else if (spec.toLowerCase().equals("blue")) {
+ colors88.set(index, 0x000000a8);
+ } else if (spec.toLowerCase().equals("magenta")) {
+ colors88.set(index, 0x00a800a8);
+ } else if (spec.toLowerCase().equals("cyan")) {
+ colors88.set(index, 0x0000a8a8);
+ } else if (spec.toLowerCase().equals("white")) {
+ colors88.set(index, 0x00a8a8a8);
+ }
+
+ }
+
+ /**
+ * Reset the emulation state.
+ */
+ private void reset() {
+
+ currentState = new SaveableState();
+ savedState = new SaveableState();
+ scanState = ScanState.GROUND;
+ width = 80;
+ height = 24;
+ scrollRegionTop = 0;
+ scrollRegionBottom = height - 1;
+ rightMargin = width - 1;
+ newLineMode = false;
+ arrowKeyMode = ArrowKeyMode.ANSI;
+ keypadMode = KeypadMode.Numeric;
+ wrapLineFlag = false;
+ if (displayListener != null) {
+ width = displayListener.getDisplayWidth();
+ height = displayListener.getDisplayHeight();
+ rightMargin = width - 1;
+ }
+
+ // Flags
+ shiftOut = false;
+ vt52Mode = false;
+ insertMode = false;
+ columns132 = false;
+ newLineMode = false;
+ reverseVideo = false;
+ fullDuplex = true;
+ cursorVisible = true;
+
+ // VT220
+ singleshift = Singleshift.NONE;
+ s8c1t = false;
+ printerControllerMode = false;
+
+ // XTERM
+ mouseProtocol = MouseProtocol.OFF;
+ mouseEncoding = MouseEncoding.X10;
+
+ // Tab stops
+ resetTabStops();
+
+ // Reset extra colors
+ resetColors();
+
+ // Clear CSI stuff
+ toGround();
+ }
+
+ /**
+ * Append a new line to the bottom of the display, adding lines off the
+ * top to the scrollback buffer.
+ */
+ private void newDisplayLine() {
+ // Scroll the top line off into the scrollback buffer
+ scrollback.add(display.get(0));
+ if (scrollback.size() > maxScrollback) {
+ scrollback.remove(0);
+ scrollback.trimToSize();
+ }
+ display.remove(0);
+ display.trimToSize();
+ DisplayLine line = new DisplayLine(currentState.attr);
+ line.setReverseColor(reverseVideo);
+ display.add(line);
+ }
+
+ /**
+ * Wraps the current line.
+ */
+ private void wrapCurrentLine() {
+ if (currentState.cursorY == height - 1) {
+ newDisplayLine();
+ }
+ if (currentState.cursorY < height - 1) {
+ currentState.cursorY++;
+ }
+ currentState.cursorX = 0;
+ }
+
+ /**
+ * Handle a carriage return.
+ */
+ private void carriageReturn() {
+ currentState.cursorX = 0;
+ wrapLineFlag = false;
+ }
+
+ /**
+ * Reverse the color of the visible display.
+ */
+ private void invertDisplayColors() {
+ for (DisplayLine line: display) {
+ line.setReverseColor(!line.isReverseColor());
+ }
+ }
+
+ /**
+ * Handle a linefeed.
+ */
+ private void linefeed() {
+
+ if (currentState.cursorY < scrollRegionBottom) {
+ // Increment screen y
+ currentState.cursorY++;
+ } else {
+
+ // Screen y does not increment
+
+ /*
+ * Two cases: either we're inside a scrolling region or not. If
+ * the scrolling region bottom is the bottom of the screen, then
+ * push the top line into the buffer. Else scroll the scrolling
+ * region up.
+ */
+ if ((scrollRegionBottom == height - 1) && (scrollRegionTop == 0)) {
+
+ // We're at the bottom of the scroll region, AND the scroll
+ // region is the entire screen.
+
+ // New line
+ newDisplayLine();
+
+ } else {
+ // We're at the bottom of the scroll region, AND the scroll
+ // region is NOT the entire screen.
+ scrollingRegionScrollUp(scrollRegionTop, scrollRegionBottom, 1);
+ }
+ }
+
+ if (newLineMode) {
+ currentState.cursorX = 0;
+ }
+ wrapLineFlag = false;
+ }
+
+ /**
+ * Prints one character to the display buffer.
+ *
+ * @param ch character to display
+ */
+ private void printCharacter(final int ch) {
+ int rightMargin = this.rightMargin;
+
+ if (StringUtils.width(ch) == 2) {
+ // This is a full-width character. Save two spaces, and then
+ // draw the character as two image halves.
+ int x0 = currentState.cursorX;
+ int y0 = currentState.cursorY;
+ printCharacter(' ');
+ printCharacter(' ');
+ if ((currentState.cursorX == x0 + 2)
+ && (currentState.cursorY == y0)
+ ) {
+ // We can draw both halves of the character.
+ drawHalves(x0, y0, x0 + 1, y0, ch);
+ } else if ((currentState.cursorX == x0 + 1)
+ && (currentState.cursorY == y0)
+ ) {
+ // VT100 line wrap behavior: we should be at the right
+ // margin. We can draw both halves of the character.
+ drawHalves(x0, y0, x0 + 1, y0, ch);
+ } else {
+ // The character splits across the line. Draw the entire
+ // character on the new line, giving one more space for it.
+ x0 = currentState.cursorX - 1;
+ y0 = currentState.cursorY;
+ printCharacter(' ');
+ drawHalves(x0, y0, x0 + 1, y0, ch);
+ }
+ return;
+ }
+
+ // Check if we have double-width, and if so chop at 40/66 instead of
+ // 80/132
+ if (display.get(currentState.cursorY).isDoubleWidth()) {
+ rightMargin = ((rightMargin + 1) / 2) - 1;
+ }
+
+ // Check the unusually-complicated line wrapping conditions...
+ if (currentState.cursorX == rightMargin) {
+
+ if (currentState.lineWrap == true) {
+ /*
+ * This case happens when: the cursor was already on the
+ * right margin (either through printing or by an explicit
+ * placement command), and a character was printed.
+ *
+ * The line wraps only when a new character arrives AND the
+ * cursor is already on the right margin AND has placed a
+ * character in its cell. Easier to see than to explain.
+ */
+ if (wrapLineFlag == false) {
+ /*
+ * This block marks the case that we are in the margin
+ * and the first character has been received and printed.
+ */
+ wrapLineFlag = true;
+ } else {
+ /*
+ * This block marks the case that we are in the margin
+ * and the second character has been received and
+ * printed.
+ */
+ wrapLineFlag = false;
+ wrapCurrentLine();
+ }
+ }
+ } else if (currentState.cursorX <= rightMargin) {
+ /*
+ * This is the normal case: a character came in and was printed
+ * to the left of the right margin column.
+ */
+
+ // Turn off VT100 special-case flag
+ wrapLineFlag = false;
+ }
+
+ // "Print" the character
+ Cell newCell = new Cell(ch);
+ CellAttributes newCellAttributes = (CellAttributes) newCell;
+ newCellAttributes.setTo(currentState.attr);
+ DisplayLine line = display.get(currentState.cursorY);
+
+ if (StringUtils.width(ch) == 1) {
+ // Insert mode special case
+ if (insertMode == true) {
+ line.insert(currentState.cursorX, newCell);
+ } else {
+ // Replace an existing character
+ line.replace(currentState.cursorX, newCell);
+ }
+
+ // Increment horizontal
+ if (wrapLineFlag == false) {
+ currentState.cursorX++;
+ if (currentState.cursorX > rightMargin) {
+ currentState.cursorX--;
+ }
+ }
+ }
+ }
+
+ /**
+ * Translate the mouse event to a VT100, VT220, or XTERM sequence and
+ * send to the remote side.
+ *
+ * @param mouse mouse event received from the local user
+ */
+ private void mouse(final TMouseEvent mouse) {
+
+ /*
+ System.err.printf("mouse(): protocol %s encoding %s mouse %s\n",
+ mouseProtocol, mouseEncoding, mouse);
+ */
+
+ if (mouseEncoding == MouseEncoding.X10) {
+ // We will support X10 but only for (160,94) and smaller.
+ if ((mouse.getX() >= 160) || (mouse.getY() >= 94)) {
+ return;
+ }
+ }
+
+ switch (mouseProtocol) {
+
+ case OFF:
+ // Do nothing
+ return;
+
+ case X10:
+ // Only report button presses
+ if (mouse.getType() != TMouseEvent.Type.MOUSE_DOWN) {
+ return;
+ }
+ break;
+
+ case NORMAL:
+ // Only report button presses and releases
+ if ((mouse.getType() != TMouseEvent.Type.MOUSE_DOWN)
+ && (mouse.getType() != TMouseEvent.Type.MOUSE_UP)
+ ) {
+ return;
+ }
+ break;
+
+ case BUTTONEVENT:
+ /*
+ * Only report button presses, button releases, and motions that
+ * have a button down (i.e. drag-and-drop).
+ */
+ if (mouse.getType() == TMouseEvent.Type.MOUSE_MOTION) {
+ if (!mouse.isMouse1()
+ && !mouse.isMouse2()
+ && !mouse.isMouse3()
+ && !mouse.isMouseWheelUp()
+ && !mouse.isMouseWheelDown()
+ ) {
+ return;
+ }
+ }
+ break;
+
+ case ANYEVENT:
+ // Report everything
+ break;
+ }
+
+ // Now encode the event
+ StringBuilder sb = new StringBuilder(6);
+ if (mouseEncoding == MouseEncoding.SGR) {
+ sb.append((char) 0x1B);
+ sb.append("[<");
+
+ if (mouse.isMouse1()) {
+ if (mouse.getType() == TMouseEvent.Type.MOUSE_MOTION) {
+ sb.append("32;");
+ } else {
+ sb.append("0;");
+ }
+ } else if (mouse.isMouse2()) {
+ if (mouse.getType() == TMouseEvent.Type.MOUSE_MOTION) {
+ sb.append("33;");
+ } else {
+ sb.append("1;");
+ }
+ } else if (mouse.isMouse3()) {
+ if (mouse.getType() == TMouseEvent.Type.MOUSE_MOTION) {
+ sb.append("34;");
+ } else {
+ sb.append("2;");
+ }
+ } else if (mouse.isMouseWheelUp()) {
+ sb.append("64;");
+ } else if (mouse.isMouseWheelDown()) {
+ sb.append("65;");
+ } else {
+ // This is motion with no buttons down.
+ sb.append("35;");
+ }
+
+ sb.append(String.format("%d;%d", mouse.getX() + 1,
+ mouse.getY() + 1));
+
+ if (mouse.getType() == TMouseEvent.Type.MOUSE_UP) {
+ sb.append("m");
+ } else {
+ sb.append("M");
+ }
+
+ } else {
+ // X10 and UTF8 encodings
+ sb.append((char) 0x1B);
+ sb.append('[');
+ sb.append('M');
+ if (mouse.getType() == TMouseEvent.Type.MOUSE_UP) {
+ sb.append((char) (0x03 + 32));
+ } else if (mouse.isMouse1()) {
+ if (mouse.getType() == TMouseEvent.Type.MOUSE_MOTION) {
+ sb.append((char) (0x00 + 32 + 32));
+ } else {
+ sb.append((char) (0x00 + 32));
+ }
+ } else if (mouse.isMouse2()) {
+ if (mouse.getType() == TMouseEvent.Type.MOUSE_MOTION) {
+ sb.append((char) (0x01 + 32 + 32));
+ } else {
+ sb.append((char) (0x01 + 32));
+ }
+ } else if (mouse.isMouse3()) {
+ if (mouse.getType() == TMouseEvent.Type.MOUSE_MOTION) {
+ sb.append((char) (0x02 + 32 + 32));
+ } else {
+ sb.append((char) (0x02 + 32));
+ }
+ } else if (mouse.isMouseWheelUp()) {
+ sb.append((char) (0x04 + 64));
+ } else if (mouse.isMouseWheelDown()) {
+ sb.append((char) (0x05 + 64));
+ } else {
+ // This is motion with no buttons down.
+ sb.append((char) (0x03 + 32));
+ }
+
+ sb.append((char) (mouse.getX() + 33));
+ sb.append((char) (mouse.getY() + 33));
+ }
+
+ // System.err.printf("Would write: \'%s\'\n", sb.toString());
+ writeRemote(sb.toString());
+ }
+
+ /**
+ * Translate the keyboard press to a VT100, VT220, or XTERM sequence and
+ * send to the remote side.
+ *
+ * @param keypress keypress received from the local user
+ */
+ private void keypress(final TKeypress keypress) {
+ writeRemote(keypressToString(keypress));
+ }
+
+ /**
+ * Build one of the complex xterm keystroke sequences, storing the result in
+ * xterm_keystroke_buffer.
+ *
+ * @param ss3 the prefix to use based on VT100 state.
+ * @param first the first character, usually a number.
+ * @param first the last character, one of the following: ~ A B C D F H
+ * @param ctrl whether or not ctrl is down
+ * @param alt whether or not alt is down
+ * @param shift whether or not shift is down
+ * @return the buffer with the full key sequence
+ */
+ private String xtermBuildKeySequence(final String ss3, final char first,
+ final char last, boolean ctrl, boolean alt, boolean shift) {
+
+ StringBuilder sb = new StringBuilder(ss3);
+ if ((last == '~') || (ctrl == true) || (alt == true)
+ || (shift == true)
+ ) {
+ sb.append(first);
+ if ( (ctrl == false) && (alt == false) && (shift == true)) {
+ sb.append(";2");
+ } else if ((ctrl == false) && (alt == true) && (shift == false)) {
+ sb.append(";3");
+ } else if ((ctrl == false) && (alt == true) && (shift == true)) {
+ sb.append(";4");
+ } else if ((ctrl == true) && (alt == false) && (shift == false)) {
+ sb.append(";5");
+ } else if ((ctrl == true) && (alt == false) && (shift == true)) {
+ sb.append(";6");
+ } else if ((ctrl == true) && (alt == true) && (shift == false)) {
+ sb.append(";7");
+ } else if ((ctrl == true) && (alt == true) && (shift == true)) {
+ sb.append(";8");
+ }
+ }
+ sb.append(last);
+ return sb.toString();
+ }
+
+ /**
+ * Translate the keyboard press to a VT100, VT220, or XTERM sequence.
+ *
+ * @param keypress keypress received from the local user
+ * @return string to transmit to the remote side
+ */
+ @SuppressWarnings("fallthrough")
+ private String keypressToString(final TKeypress keypress) {
+
+ if ((fullDuplex == false) && (!keypress.isFnKey())) {
+ /*
+ * If this is a control character, process it like it came from
+ * the remote side.
+ */
+ if (keypress.getChar() < 0x20) {
+ handleControlChar((char) keypress.getChar());
+ } else {
+ // Local echo for everything else
+ printCharacter(keypress.getChar());
+ }
+ if (displayListener != null) {
+ displayListener.displayChanged();
+ }
+ }
+
+ if ((newLineMode == true) && (keypress.equals(kbEnter))) {
+ // NLM: send CRLF
+ return "\015\012";
+ }
+
+ // Handle control characters
+ if ((keypress.isCtrl()) && (!keypress.isFnKey())) {
+ StringBuilder sb = new StringBuilder();
+ int ch = keypress.getChar();
+ ch -= 0x40;
+ sb.append(Character.toChars(ch));
+ return sb.toString();
+ }
+
+ // Handle alt characters
+ if ((keypress.isAlt()) && (!keypress.isFnKey())) {
+ StringBuilder sb = new StringBuilder("\033");
+ int ch = keypress.getChar();
+ sb.append(Character.toChars(ch));
+ return sb.toString();
+ }
+
+ if (keypress.equals(kbBackspaceDel)) {
+ switch (type) {
+ case VT100:
+ return "\010";
+ case VT102:
+ return "\010";
+ case VT220:
+ return "\177";
+ case XTERM:
+ return "\177";
+ }
+ }
+
+ if (keypress.equalsWithoutModifiers(kbLeft)) {
+ switch (type) {
+ case XTERM:
+ switch (arrowKeyMode) {
+ case ANSI:
+ return xtermBuildKeySequence("\033[", '1', 'D',
+ keypress.isCtrl(), keypress.isAlt(),
+ keypress.isShift());
+ case VT52:
+ return xtermBuildKeySequence("\033", '1', 'D',
+ keypress.isCtrl(), keypress.isAlt(),
+ keypress.isShift());
+ case VT100:
+ return xtermBuildKeySequence("\033O", '1', 'D',
+ keypress.isCtrl(), keypress.isAlt(),
+ keypress.isShift());
+ }
+ default:
+ switch (arrowKeyMode) {
+ case ANSI:
+ return "\033[D";
+ case VT52:
+ return "\033D";
+ case VT100:
+ return "\033OD";
+ }
+ }
+ }
+
+ if (keypress.equalsWithoutModifiers(kbRight)) {
+ switch (type) {
+ case XTERM:
+ switch (arrowKeyMode) {
+ case ANSI:
+ return xtermBuildKeySequence("\033[", '1', 'C',
+ keypress.isCtrl(), keypress.isAlt(),
+ keypress.isShift());
+ case VT52:
+ return xtermBuildKeySequence("\033", '1', 'C',
+ keypress.isCtrl(), keypress.isAlt(),
+ keypress.isShift());
+ case VT100:
+ return xtermBuildKeySequence("\033O", '1', 'C',
+ keypress.isCtrl(), keypress.isAlt(),
+ keypress.isShift());
+ }
+ default:
+ switch (arrowKeyMode) {
+ case ANSI:
+ return "\033[C";
+ case VT52:
+ return "\033C";
+ case VT100:
+ return "\033OC";
+ }
+ }
+ }
+
+ if (keypress.equalsWithoutModifiers(kbUp)) {
+ switch (type) {
+ case XTERM:
+ switch (arrowKeyMode) {
+ case ANSI:
+ return xtermBuildKeySequence("\033[", '1', 'A',
+ keypress.isCtrl(), keypress.isAlt(),
+ keypress.isShift());
+ case VT52:
+ return xtermBuildKeySequence("\033", '1', 'A',
+ keypress.isCtrl(), keypress.isAlt(),
+ keypress.isShift());
+ case VT100:
+ return xtermBuildKeySequence("\033O", '1', 'A',
+ keypress.isCtrl(), keypress.isAlt(),
+ keypress.isShift());
+ }
+ default:
+ switch (arrowKeyMode) {
+ case ANSI:
+ return "\033[A";
+ case VT52:
+ return "\033A";
+ case VT100:
+ return "\033OA";
+ }
+ }
+ }
+
+ if (keypress.equalsWithoutModifiers(kbDown)) {
+ switch (type) {
+ case XTERM:
+ switch (arrowKeyMode) {
+ case ANSI:
+ return xtermBuildKeySequence("\033[", '1', 'B',
+ keypress.isCtrl(), keypress.isAlt(),
+ keypress.isShift());
+ case VT52:
+ return xtermBuildKeySequence("\033", '1', 'B',
+ keypress.isCtrl(), keypress.isAlt(),
+ keypress.isShift());
+ case VT100:
+ return xtermBuildKeySequence("\033O", '1', 'B',
+ keypress.isCtrl(), keypress.isAlt(),
+ keypress.isShift());
+ }
+ default:
+ switch (arrowKeyMode) {
+ case ANSI:
+ return "\033[B";
+ case VT52:
+ return "\033B";
+ case VT100:
+ return "\033OB";
+ }
+ }
+ }
+
+ if (keypress.equalsWithoutModifiers(kbHome)) {
+ switch (type) {
+ case XTERM:
+ switch (arrowKeyMode) {
+ case ANSI:
+ return xtermBuildKeySequence("\033[", '1', 'H',
+ keypress.isCtrl(), keypress.isAlt(),
+ keypress.isShift());
+ case VT52:
+ return xtermBuildKeySequence("\033", '1', 'H',
+ keypress.isCtrl(), keypress.isAlt(),
+ keypress.isShift());
+ case VT100:
+ return xtermBuildKeySequence("\033O", '1', 'H',
+ keypress.isCtrl(), keypress.isAlt(),
+ keypress.isShift());
+ }
+ default:
+ switch (arrowKeyMode) {
+ case ANSI:
+ return "\033[H";
+ case VT52:
+ return "\033H";
+ case VT100:
+ return "\033OH";
+ }
+ }
+ }
+
+ if (keypress.equalsWithoutModifiers(kbEnd)) {
+ switch (type) {
+ case XTERM:
+ switch (arrowKeyMode) {
+ case ANSI:
+ return xtermBuildKeySequence("\033[", '1', 'F',
+ keypress.isCtrl(), keypress.isAlt(),
+ keypress.isShift());
+ case VT52:
+ return xtermBuildKeySequence("\033", '1', 'F',
+ keypress.isCtrl(), keypress.isAlt(),
+ keypress.isShift());
+ case VT100:
+ return xtermBuildKeySequence("\033O", '1', 'F',
+ keypress.isCtrl(), keypress.isAlt(),
+ keypress.isShift());
+ }
+ default:
+ switch (arrowKeyMode) {
+ case ANSI:
+ return "\033[F";
+ case VT52:
+ return "\033F";
+ case VT100:
+ return "\033OF";
+ }
+ }
+ }
+
+ if (keypress.equals(kbF1)) {
+ // PF1
+ if (vt52Mode) {
+ return "\033P";
+ }
+ return "\033OP";
+ }
+
+ if (keypress.equals(kbF2)) {
+ // PF2
+ if (vt52Mode) {
+ return "\033Q";
+ }
+ return "\033OQ";
+ }
+
+ if (keypress.equals(kbF3)) {
+ // PF3
+ if (vt52Mode) {
+ return "\033R";
+ }
+ return "\033OR";
+ }
+
+ if (keypress.equals(kbF4)) {
+ // PF4
+ if (vt52Mode) {
+ return "\033S";
+ }
+ return "\033OS";
+ }
+
+ if (keypress.equals(kbF5)) {
+ switch (type) {
+ case VT100:
+ return "\033Ot";
+ case VT102:
+ return "\033Ot";
+ case VT220:
+ return "\033[15~";
+ case XTERM:
+ return "\033[15~";
+ }
+ }
+
+ if (keypress.equals(kbF6)) {
+ switch (type) {
+ case VT100:
+ return "\033Ou";
+ case VT102:
+ return "\033Ou";
+ case VT220:
+ return "\033[17~";
+ case XTERM:
+ return "\033[17~";
+ }
+ }
+
+ if (keypress.equals(kbF7)) {
+ switch (type) {
+ case VT100:
+ return "\033Ov";
+ case VT102:
+ return "\033Ov";
+ case VT220:
+ return "\033[18~";
+ case XTERM:
+ return "\033[18~";
+ }
+ }
+
+ if (keypress.equals(kbF8)) {
+ switch (type) {
+ case VT100:
+ return "\033Ol";
+ case VT102:
+ return "\033Ol";
+ case VT220:
+ return "\033[19~";
+ case XTERM:
+ return "\033[19~";
+ }
+ }
+
+ if (keypress.equals(kbF9)) {
+ switch (type) {
+ case VT100:
+ return "\033Ow";
+ case VT102:
+ return "\033Ow";
+ case VT220:
+ return "\033[20~";
+ case XTERM:
+ return "\033[20~";
+ }
+ }
+
+ if (keypress.equals(kbF10)) {
+ switch (type) {
+ case VT100:
+ return "\033Ox";
+ case VT102:
+ return "\033Ox";
+ case VT220:
+ return "\033[21~";
+ case XTERM:
+ return "\033[21~";
+ }
+ }
+
+ if (keypress.equals(kbF11)) {
+ return "\033[23~";
+ }
+
+ if (keypress.equals(kbF12)) {
+ return "\033[24~";
+ }
+
+ if (keypress.equals(kbShiftF1)) {
+ // Shifted PF1
+ if (vt52Mode) {
+ return "\0332P";
+ }
+ if (type == DeviceType.XTERM) {
+ return "\0331;2P";
+ }
+ return "\033O2P";
+ }
+
+ if (keypress.equals(kbShiftF2)) {
+ // Shifted PF2
+ if (vt52Mode) {
+ return "\0332Q";
+ }
+ if (type == DeviceType.XTERM) {
+ return "\0331;2Q";
+ }
+ return "\033O2Q";
+ }
+
+ if (keypress.equals(kbShiftF3)) {
+ // Shifted PF3
+ if (vt52Mode) {
+ return "\0332R";
+ }
+ if (type == DeviceType.XTERM) {
+ return "\0331;2R";
+ }
+ return "\033O2R";
+ }
+
+ if (keypress.equals(kbShiftF4)) {
+ // Shifted PF4
+ if (vt52Mode) {
+ return "\0332S";
+ }
+ if (type == DeviceType.XTERM) {
+ return "\0331;2S";
+ }
+ return "\033O2S";
+ }
+
+ if (keypress.equals(kbShiftF5)) {
+ // Shifted F5
+ return "\033[15;2~";
+ }
+
+ if (keypress.equals(kbShiftF6)) {
+ // Shifted F6
+ return "\033[17;2~";
+ }
+
+ if (keypress.equals(kbShiftF7)) {
+ // Shifted F7
+ return "\033[18;2~";
+ }
+
+ if (keypress.equals(kbShiftF8)) {
+ // Shifted F8
+ return "\033[19;2~";
+ }
+
+ if (keypress.equals(kbShiftF9)) {
+ // Shifted F9
+ return "\033[20;2~";
+ }
+
+ if (keypress.equals(kbShiftF10)) {
+ // Shifted F10
+ return "\033[21;2~";
+ }
+
+ if (keypress.equals(kbShiftF11)) {
+ // Shifted F11
+ return "\033[23;2~";
+ }
+
+ if (keypress.equals(kbShiftF12)) {
+ // Shifted F12
+ return "\033[24;2~";
+ }
+
+ if (keypress.equals(kbCtrlF1)) {
+ // Control PF1
+ if (vt52Mode) {
+ return "\0335P";
+ }
+ if (type == DeviceType.XTERM) {
+ return "\0331;5P";
+ }
+ return "\033O5P";
+ }
+
+ if (keypress.equals(kbCtrlF2)) {
+ // Control PF2
+ if (vt52Mode) {
+ return "\0335Q";
+ }
+ if (type == DeviceType.XTERM) {
+ return "\0331;5Q";
+ }
+ return "\033O5Q";
+ }
+
+ if (keypress.equals(kbCtrlF3)) {
+ // Control PF3
+ if (vt52Mode) {
+ return "\0335R";
+ }
+ if (type == DeviceType.XTERM) {
+ return "\0331;5R";
+ }
+ return "\033O5R";
+ }
+
+ if (keypress.equals(kbCtrlF4)) {
+ // Control PF4
+ if (vt52Mode) {
+ return "\0335S";
+ }
+ if (type == DeviceType.XTERM) {
+ return "\0331;5S";
+ }
+ return "\033O5S";
+ }
+
+ if (keypress.equals(kbCtrlF5)) {
+ // Control F5
+ return "\033[15;5~";
+ }
+
+ if (keypress.equals(kbCtrlF6)) {
+ // Control F6
+ return "\033[17;5~";
+ }
+
+ if (keypress.equals(kbCtrlF7)) {
+ // Control F7
+ return "\033[18;5~";
+ }
+
+ if (keypress.equals(kbCtrlF8)) {
+ // Control F8
+ return "\033[19;5~";
+ }
+
+ if (keypress.equals(kbCtrlF9)) {
+ // Control F9
+ return "\033[20;5~";
+ }
+
+ if (keypress.equals(kbCtrlF10)) {
+ // Control F10
+ return "\033[21;5~";
+ }
+
+ if (keypress.equals(kbCtrlF11)) {
+ // Control F11
+ return "\033[23;5~";
+ }
+
+ if (keypress.equals(kbCtrlF12)) {
+ // Control F12
+ return "\033[24;5~";
+ }
+
+ if (keypress.equalsWithoutModifiers(kbPgUp)) {
+ switch (type) {
+ case XTERM:
+ return xtermBuildKeySequence("\033[", '5', '~',
+ keypress.isCtrl(), keypress.isAlt(),
+ keypress.isShift());
+ default:
+ return "\033[5~";
+ }
+ }
+
+ if (keypress.equalsWithoutModifiers(kbPgDn)) {
+ switch (type) {
+ case XTERM:
+ return xtermBuildKeySequence("\033[", '6', '~',
+ keypress.isCtrl(), keypress.isAlt(),
+ keypress.isShift());
+ default:
+ return "\033[6~";
+ }
+ }
+
+ if (keypress.equalsWithoutModifiers(kbIns)) {
+ switch (type) {
+ case XTERM:
+ return xtermBuildKeySequence("\033[", '2', '~',
+ keypress.isCtrl(), keypress.isAlt(),
+ keypress.isShift());
+ default:
+ return "\033[2~";
+ }
+ }
+
+ if (keypress.equalsWithoutModifiers(kbDel)) {
+ switch (type) {
+ case XTERM:
+ return xtermBuildKeySequence("\033[", '3', '~',
+ keypress.isCtrl(), keypress.isAlt(),
+ keypress.isShift());
+ default:
+ // Delete sends real delete for VTxxx
+ return "\177";
+ }
+ }
+
+ if (keypress.equals(kbEnter)) {
+ return "\015";
+ }
+
+ if (keypress.equals(kbEsc)) {
+ return "\033";
+ }
+
+ if (keypress.equals(kbAltEsc)) {
+ return "\033\033";
+ }
+
+ if (keypress.equals(kbTab)) {
+ return "\011";
+ }
+
+ if ((keypress.equalsWithoutModifiers(kbBackTab)) ||
+ (keypress.equals(kbShiftTab))
+ ) {
+ switch (type) {
+ case XTERM:
+ return "\033[Z";
+ default:
+ return "\011";
+ }
+ }
+
+ // Non-alt, non-ctrl characters
+ if (!keypress.isFnKey()) {
+ StringBuilder sb = new StringBuilder();
+ sb.append(Character.toChars(keypress.getChar()));
+ return sb.toString();
+ }
+ return "";
+ }
+
+ /**
+ * Map a symbol in any one of the VT100/VT220 character sets to a Unicode
+ * symbol.
+ *
+ * @param ch 8-bit character from the remote side
+ * @param charsetGl character set defined for GL
+ * @param charsetGr character set defined for GR
+ * @return character to display on the screen
+ */
+ private char mapCharacterCharset(final int ch,
+ final CharacterSet charsetGl,
+ final CharacterSet charsetGr) {
+
+ int lookupChar = ch;
+ CharacterSet lookupCharset = charsetGl;
+
+ if (ch >= 0x80) {
+ assert ((type == DeviceType.VT220) || (type == DeviceType.XTERM));
+ lookupCharset = charsetGr;
+ lookupChar &= 0x7F;
+ }
+
+ switch (lookupCharset) {
+
+ case DRAWING:
+ return DECCharacterSets.SPECIAL_GRAPHICS[lookupChar];
+
+ case UK:
+ return DECCharacterSets.UK[lookupChar];
+
+ case US:
+ return DECCharacterSets.US_ASCII[lookupChar];
+
+ case NRC_DUTCH:
+ return DECCharacterSets.NL[lookupChar];
+
+ case NRC_FINNISH:
+ return DECCharacterSets.FI[lookupChar];
+
+ case NRC_FRENCH:
+ return DECCharacterSets.FR[lookupChar];
+
+ case NRC_FRENCH_CA:
+ return DECCharacterSets.FR_CA[lookupChar];
+
+ case NRC_GERMAN:
+ return DECCharacterSets.DE[lookupChar];
+
+ case NRC_ITALIAN:
+ return DECCharacterSets.IT[lookupChar];
+
+ case NRC_NORWEGIAN:
+ return DECCharacterSets.NO[lookupChar];
+
+ case NRC_SPANISH:
+ return DECCharacterSets.ES[lookupChar];
+
+ case NRC_SWEDISH:
+ return DECCharacterSets.SV[lookupChar];
+
+ case NRC_SWISS:
+ return DECCharacterSets.SWISS[lookupChar];
+
+ case DEC_SUPPLEMENTAL:
+ return DECCharacterSets.DEC_SUPPLEMENTAL[lookupChar];
+
+ case VT52_GRAPHICS:
+ return DECCharacterSets.VT52_SPECIAL_GRAPHICS[lookupChar];
+
+ case ROM:
+ return DECCharacterSets.US_ASCII[lookupChar];
+
+ case ROM_SPECIAL:
+ return DECCharacterSets.US_ASCII[lookupChar];
+
+ default:
+ throw new IllegalArgumentException("Invalid character set value: "
+ + lookupCharset);
+ }
+ }
+
+ /**
+ * Map an 8-bit byte into a printable character.
+ *
+ * @param ch either 8-bit or Unicode character from the remote side
+ * @return character to display on the screen
+ */
+ private int mapCharacter(final int ch) {
+ if (ch >= 0x100) {
+ // Unicode character, just return it
+ return ch;
+ }
+
+ CharacterSet charsetGl = currentState.g0Charset;
+ CharacterSet charsetGr = currentState.grCharset;
+
+ if (vt52Mode == true) {
+ if (shiftOut == true) {
+ // Shifted out character, pull from VT52 graphics
+ charsetGl = currentState.g1Charset;
+ charsetGr = CharacterSet.US;
+ } else {
+ // Normal
+ charsetGl = currentState.g0Charset;
+ charsetGr = CharacterSet.US;
+ }
+
+ // Pull the character
+ return mapCharacterCharset(ch, charsetGl, charsetGr);
+ }
+
+ // shiftOout
+ if (shiftOut == true) {
+ // Shifted out character, pull from G1
+ charsetGl = currentState.g1Charset;
+ charsetGr = currentState.grCharset;
+
+ // Pull the character
+ return mapCharacterCharset(ch, charsetGl, charsetGr);
+ }
+
+ // SS2
+ if (singleshift == Singleshift.SS2) {
+
+ singleshift = Singleshift.NONE;
+
+ // Shifted out character, pull from G2
+ charsetGl = currentState.g2Charset;
+ charsetGr = currentState.grCharset;
+ }
+
+ // SS3
+ if (singleshift == Singleshift.SS3) {
+
+ singleshift = Singleshift.NONE;
+
+ // Shifted out character, pull from G3
+ charsetGl = currentState.g3Charset;
+ charsetGr = currentState.grCharset;
+ }
+
+ if ((type == DeviceType.VT220) || (type == DeviceType.XTERM)) {
+ // Check for locking shift
+
+ switch (currentState.glLockshift) {
+
+ case G1_GR:
+ throw new IllegalArgumentException("programming bug");
+
+ case G2_GR:
+ throw new IllegalArgumentException("programming bug");
+
+ case G3_GR:
+ throw new IllegalArgumentException("programming bug");
+
+ case G2_GL:
+ // LS2
+ charsetGl = currentState.g2Charset;
+ break;
+
+ case G3_GL:
+ // LS3
+ charsetGl = currentState.g3Charset;
+ break;
+
+ case NONE:
+ // Normal
+ charsetGl = currentState.g0Charset;
+ break;
+ }
+
+ switch (currentState.grLockshift) {
+
+ case G2_GL:
+ throw new IllegalArgumentException("programming bug");
+
+ case G3_GL:
+ throw new IllegalArgumentException("programming bug");
+
+ case G1_GR:
+ // LS1R
+ charsetGr = currentState.g1Charset;
+ break;
+
+ case G2_GR:
+ // LS2R
+ charsetGr = currentState.g2Charset;
+ break;
+
+ case G3_GR:
+ // LS3R
+ charsetGr = currentState.g3Charset;
+ break;
+
+ case NONE:
+ // Normal
+ charsetGr = CharacterSet.DEC_SUPPLEMENTAL;
+ break;
+ }
+
+
+ }
+
+ // Pull the character
+ return mapCharacterCharset(ch, charsetGl, charsetGr);
+ }
+
+ /**
+ * Scroll the text within a scrolling region up n lines.
+ *
+ * @param regionTop top row of the scrolling region
+ * @param regionBottom bottom row of the scrolling region
+ * @param n number of lines to scroll
+ */
+ private void scrollingRegionScrollUp(final int regionTop,
+ final int regionBottom, final int n) {
+
+ if (regionTop >= regionBottom) {
+ return;
+ }
+
+ // Sanity check: see if there will be any characters left after the
+ // scroll
+ if (regionBottom + 1 - regionTop <= n) {
+ // There won't be anything left in the region, so just call
+ // eraseScreen() and return.
+ eraseScreen(regionTop, 0, regionBottom, width - 1, false);
+ return;
+ }
+
+ int remaining = regionBottom + 1 - regionTop - n;
+ List<DisplayLine> displayTop = display.subList(0, regionTop);
+ List<DisplayLine> displayBottom = display.subList(regionBottom + 1,
+ display.size());
+ List<DisplayLine> displayMiddle = display.subList(regionBottom + 1
+ - remaining, regionBottom + 1);
+ display = new ArrayList<DisplayLine>(displayTop);
+ display.addAll(displayMiddle);
+ for (int i = 0; i < n; i++) {
+ DisplayLine line = new DisplayLine(currentState.attr);
+ line.setReverseColor(reverseVideo);
+ display.add(line);
+ }
+ display.addAll(displayBottom);
+
+ assert (display.size() == height);
+ }
+
+ /**
+ * Scroll the text within a scrolling region down n lines.
+ *
+ * @param regionTop top row of the scrolling region
+ * @param regionBottom bottom row of the scrolling region
+ * @param n number of lines to scroll
+ */
+ private void scrollingRegionScrollDown(final int regionTop,
+ final int regionBottom, final int n) {
+
+ if (regionTop >= regionBottom) {
+ return;
+ }
+
+ // Sanity check: see if there will be any characters left after the
+ // scroll
+ if (regionBottom + 1 - regionTop <= n) {
+ // There won't be anything left in the region, so just call
+ // eraseScreen() and return.
+ eraseScreen(regionTop, 0, regionBottom, width - 1, false);
+ return;
+ }
+
+ int remaining = regionBottom + 1 - regionTop - n;
+ List<DisplayLine> displayTop = display.subList(0, regionTop);
+ List<DisplayLine> displayBottom = display.subList(regionBottom + 1,
+ display.size());
+ List<DisplayLine> displayMiddle = display.subList(regionTop,
+ regionTop + remaining);
+ display = new ArrayList<DisplayLine>(displayTop);
+ for (int i = 0; i < n; i++) {
+ DisplayLine line = new DisplayLine(currentState.attr);
+ line.setReverseColor(reverseVideo);
+ display.add(line);
+ }
+ display.addAll(displayMiddle);
+ display.addAll(displayBottom);
+
+ assert (display.size() == height);
+ }
+
+ /**
+ * Process a control character.
+ *
+ * @param ch 8-bit character from the remote side
+ */
+ private void handleControlChar(final char ch) {
+ assert ((ch <= 0x1F) || ((ch >= 0x7F) && (ch <= 0x9F)));
+
+ switch (ch) {
+
+ case 0x00:
+ // NUL - discard
+ return;
+
+ case 0x05:
+ // ENQ
+
+ // Transmit the answerback message.
+ // Not supported
+ break;
+
+ case 0x07:
+ // BEL
+ // Not supported
+ break;
+
+ case 0x08:
+ // BS
+ cursorLeft(1, false);
+ break;
+
+ case 0x09:
+ // HT
+ advanceToNextTabStop();
+ break;
+
+ case 0x0A:
+ // LF
+ linefeed();
+ break;
+
+ case 0x0B:
+ // VT
+ linefeed();
+ break;
+
+ case 0x0C:
+ // FF
+ linefeed();
+ break;
+
+ case 0x0D:
+ // CR
+ carriageReturn();
+ break;
+
+ case 0x0E:
+ // SO
+ shiftOut = true;
+ currentState.glLockshift = LockshiftMode.NONE;
+ break;
+
+ case 0x0F:
+ // SI
+ shiftOut = false;
+ currentState.glLockshift = LockshiftMode.NONE;
+ break;
+
+ case 0x84:
+ // IND
+ ind();
+ break;
+
+ case 0x85:
+ // NEL
+ nel();
+ break;
+
+ case 0x88:
+ // HTS
+ hts();
+ break;
+
+ case 0x8D:
+ // RI
+ ri();
+ break;
+
+ case 0x8E:
+ // SS2
+ singleshift = Singleshift.SS2;
+ break;
+
+ case 0x8F:
+ // SS3
+ singleshift = Singleshift.SS3;
+ break;
+
+ default:
+ break;
+ }
+
+ }
+
+ /**
+ * Advance the cursor to the next tab stop.
+ */
+ private void advanceToNextTabStop() {
+ if (tabStops.size() == 0) {
+ // Go to the rightmost column
+ cursorRight(rightMargin - currentState.cursorX, false);
+ return;
+ }
+ for (Integer stop: tabStops) {
+ if (stop > currentState.cursorX) {
+ cursorRight(stop - currentState.cursorX, false);
+ return;
+ }
+ }
+ /*
+ * We got here, meaning there isn't a tab stop beyond the current
+ * cursor position. Place the cursor of the right-most edge of the
+ * screen.
+ */
+ cursorRight(rightMargin - currentState.cursorX, false);
+ }
+
+ /**
+ * Save a character into the collect buffer.
+ *
+ * @param ch character to save
+ */
+ private void collect(final char ch) {
+ collectBuffer.append(ch);
+ }
+
+ /**
+ * Save a byte into the CSI parameters buffer.
+ *
+ * @param ch byte to save
+ */
+ private void param(final byte ch) {
+ if (csiParams.size() == 0) {
+ csiParams.add(Integer.valueOf(0));
+ }
+ Integer x = csiParams.get(csiParams.size() - 1);
+ if ((ch >= '0') && (ch <= '9')) {
+ x *= 10;
+ x += (ch - '0');
+ csiParams.set(csiParams.size() - 1, x);
+ }
+
+ if ((ch == ';') && (csiParams.size() < 16)) {
+ csiParams.add(Integer.valueOf(0));
+ }
+ }
+
+ /**
+ * Get a CSI parameter value, with a default.
+ *
+ * @param position parameter index. 0 is the first parameter.
+ * @param defaultValue value to use if csiParams[position] doesn't exist
+ * @return parameter value
+ */
+ private int getCsiParam(final int position, final int defaultValue) {
+ if (csiParams.size() < position + 1) {
+ return defaultValue;
+ }
+ return csiParams.get(position).intValue();
+ }
+
+ /**
+ * Get a CSI parameter value, clamped to within min/max.
+ *
+ * @param position parameter index. 0 is the first parameter.
+ * @param defaultValue value to use if csiParams[position] doesn't exist
+ * @param minValue minimum value inclusive
+ * @param maxValue maximum value inclusive
+ * @return parameter value
+ */
+ private int getCsiParam(final int position, final int defaultValue,
+ final int minValue, final int maxValue) {
+
+ assert (minValue <= maxValue);
+ int value = getCsiParam(position, defaultValue);
+ if (value < minValue) {
+ value = minValue;
+ }
+ if (value > maxValue) {
+ value = maxValue;
+ }
+ return value;
+ }
+
+ /**
+ * Set or unset a toggle.
+ *
+ * @param value true for set ('h'), false for reset ('l')
+ */
+ private void setToggle(final boolean value) {
+ boolean decPrivateModeFlag = false;
+
+ for (int i = 0; i < collectBuffer.length(); i++) {
+ if (collectBuffer.charAt(i) == '?') {
+ decPrivateModeFlag = true;
+ break;
+ }
+ }
+
+ for (Integer i: csiParams) {
+
+ switch (i) {
+
+ case 1:
+ if (decPrivateModeFlag == true) {
+ // DECCKM
+ if (value == true) {
+ // Use application arrow keys
+ arrowKeyMode = ArrowKeyMode.VT100;
+ } else {
+ // Use ANSI arrow keys
+ arrowKeyMode = ArrowKeyMode.ANSI;
+ }
+ }
+ break;
+ case 2:
+ if (decPrivateModeFlag == true) {
+ if (value == false) {
+
+ // DECANM
+ vt52Mode = true;
+ arrowKeyMode = ArrowKeyMode.VT52;
+
+ /*
+ * From the VT102 docs: "You use ANSI mode to select
+ * most terminal features; the terminal uses the same
+ * features when it switches to VT52 mode. You
+ * cannot, however, change most of these features in
+ * VT52 mode."
+ *
+ * In other words, do not reset any other attributes
+ * when switching between VT52 submode and ANSI.
+ *
+ * HOWEVER, the real vt100 does switch the character
+ * set according to Usenet.
+ */
+ currentState.g0Charset = CharacterSet.US;
+ currentState.g1Charset = CharacterSet.DRAWING;
+ shiftOut = false;
+
+ if ((type == DeviceType.VT220)
+ || (type == DeviceType.XTERM)) {
+
+ // VT52 mode is explicitly 7-bit
+ s8c1t = false;
+ singleshift = Singleshift.NONE;
+ }
+ }
+ } else {
+ // KAM
+ if (value == true) {
+ // Turn off keyboard
+ // Not supported
+ } else {
+ // Turn on keyboard
+ // Not supported
+ }
+ }
+ break;
+ case 3:
+ if (decPrivateModeFlag == true) {
+ // DECCOLM
+ if (value == true) {
+ // 132 columns
+ columns132 = true;
+ rightMargin = 131;
+ } else {
+ // 80 columns
+ columns132 = false;
+ if ((displayListener != null)
+ && (type == DeviceType.XTERM)
+ ) {
+ // For xterms, reset to the actual width, not 80
+ // columns.
+ width = displayListener.getDisplayWidth();
+ rightMargin = width - 1;
+ } else {
+ rightMargin = 79;
+ width = rightMargin + 1;
+ }
+ }
+ // Entire screen is cleared, and scrolling region is
+ // reset
+ eraseScreen(0, 0, height - 1, width - 1, false);
+ scrollRegionTop = 0;
+ scrollRegionBottom = height - 1;
+ // Also home the cursor
+ cursorPosition(0, 0);
+ }
+ break;
+ case 4:
+ if (decPrivateModeFlag == true) {
+ // DECSCLM
+ if (value == true) {
+ // Smooth scroll
+ // Not supported
+ } else {
+ // Jump scroll
+ // Not supported
+ }
+ } else {
+ // IRM
+ if (value == true) {
+ insertMode = true;
+ } else {
+ insertMode = false;
+ }
+ }
+ break;
+ case 5:
+ if (decPrivateModeFlag == true) {
+ // DECSCNM
+ if (value == true) {
+ /*
+ * Set selects reverse screen, a white screen
+ * background with black characters.
+ */
+ if (reverseVideo != true) {
+ /*
+ * If in normal video, switch it back
+ */
+ invertDisplayColors();
+ }
+ reverseVideo = true;
+ } else {
+ /*
+ * Reset selects normal screen, a black screen
+ * background with white characters.
+ */
+ if (reverseVideo == true) {
+ /*
+ * If in reverse video already, switch it back
+ */
+ invertDisplayColors();
+ }
+ reverseVideo = false;
+ }
+ }
+ break;
+ case 6:
+ if (decPrivateModeFlag == true) {
+ // DECOM
+ if (value == true) {
+ // Origin is relative to scroll region cursor.
+ // Cursor can NEVER leave scrolling region.
+ currentState.originMode = true;
+ cursorPosition(0, 0);
+ } else {
+ // Origin is absolute to entire screen. Cursor can
+ // leave the scrolling region via cup() and hvp().
+ currentState.originMode = false;
+ cursorPosition(0, 0);
+ }
+ }
+ break;
+ case 7:
+ if (decPrivateModeFlag == true) {
+ // DECAWM
+ if (value == true) {
+ // Turn linewrap on
+ currentState.lineWrap = true;
+ } else {
+ // Turn linewrap off
+ currentState.lineWrap = false;
+ }
+ }
+ break;
+ case 8:
+ if (decPrivateModeFlag == true) {
+ // DECARM
+ if (value == true) {
+ // Keyboard auto-repeat on
+ // Not supported
+ } else {
+ // Keyboard auto-repeat off
+ // Not supported
+ }
+ }
+ break;
+ case 12:
+ if (decPrivateModeFlag == false) {
+ // SRM
+ if (value == true) {
+ // Local echo off
+ fullDuplex = true;
+ } else {
+ // Local echo on
+ fullDuplex = false;
+ }
+ }
+ break;
+ case 18:
+ if (decPrivateModeFlag == true) {
+ // DECPFF
+ // Not supported
+ }
+ break;
+ case 19:
+ if (decPrivateModeFlag == true) {
+ // DECPEX
+ // Not supported
+ }
+ break;
+ case 20:
+ if (decPrivateModeFlag == false) {
+ // LNM
+ if (value == true) {
+ /*
+ * Set causes a received linefeed, form feed, or
+ * vertical tab to move cursor to first column of
+ * next line. RETURN transmits both a carriage return
+ * and linefeed. This selection is also called new
+ * line option.
+ */
+ newLineMode = true;
+ } else {
+ /*
+ * Reset causes a received linefeed, form feed, or
+ * vertical tab to move cursor to next line in
+ * current column. RETURN transmits a carriage
+ * return.
+ */
+ newLineMode = false;
+ }
+ }
+ break;
+
+ case 25:
+ if ((type == DeviceType.VT220) || (type == DeviceType.XTERM)) {
+ if (decPrivateModeFlag == true) {
+ // DECTCEM
+ if (value == true) {
+ // Visible cursor
+ cursorVisible = true;
+ } else {
+ // Invisible cursor
+ cursorVisible = false;
+ }
+ }
+ }
+ break;
+
+ case 42:
+ if ((type == DeviceType.VT220) || (type == DeviceType.XTERM)) {
+ if (decPrivateModeFlag == true) {
+ // DECNRCM
+ if (value == true) {
+ // Select national mode NRC
+ // Not supported
+ } else {
+ // Select multi-national mode
+ // Not supported
+ }
+ }
+ }
+
+ break;
+
+ case 80:
+ if (type == DeviceType.XTERM) {
+ if (decPrivateModeFlag == true) {
+ if (value == true) {
+ // Enable sixel scrolling (default).
+ // TODO
+ } else {
+ // Disable sixel scrolling.
+ // TODO
+ }
+ }
+ }
+
+ break;
+
+ case 1000:
+ if ((type == DeviceType.XTERM)
+ && (decPrivateModeFlag == true)
+ ) {
+ // Mouse: normal tracking mode
+ if (value == true) {
+ mouseProtocol = MouseProtocol.NORMAL;
+ } else {
+ mouseProtocol = MouseProtocol.OFF;
+ }
+ }
+ break;
+
+ case 1002:
+ if ((type == DeviceType.XTERM)
+ && (decPrivateModeFlag == true)
+ ) {
+ // Mouse: normal tracking mode
+ if (value == true) {
+ mouseProtocol = MouseProtocol.BUTTONEVENT;
+ } else {
+ mouseProtocol = MouseProtocol.OFF;
+ }
+ }
+ break;
+
+ case 1003:
+ if ((type == DeviceType.XTERM)
+ && (decPrivateModeFlag == true)
+ ) {
+ // Mouse: Any-event tracking mode
+ if (value == true) {
+ mouseProtocol = MouseProtocol.ANYEVENT;
+ } else {
+ mouseProtocol = MouseProtocol.OFF;
+ }
+ }
+ break;
+
+ case 1005:
+ if ((type == DeviceType.XTERM)
+ && (decPrivateModeFlag == true)
+ ) {
+ // Mouse: UTF-8 coordinates
+ if (value == true) {
+ mouseEncoding = MouseEncoding.UTF8;
+ } else {
+ mouseEncoding = MouseEncoding.X10;
+ }
+ }
+ break;
+
+ case 1006:
+ if ((type == DeviceType.XTERM)
+ && (decPrivateModeFlag == true)
+ ) {
+ // Mouse: SGR coordinates
+ if (value == true) {
+ mouseEncoding = MouseEncoding.SGR;
+ } else {
+ mouseEncoding = MouseEncoding.X10;
+ }
+ }
+ break;
+
+ case 1070:
+ if (type == DeviceType.XTERM) {
+ if (decPrivateModeFlag == true) {
+ if (value == true) {
+ // Use private color registers for each sixel
+ // graphic (default).
+ sixelPalette = null;
+ } else {
+ // Use shared color registers for each sixel
+ // graphic.
+ sixelPalette = new HashMap<Integer, java.awt.Color>();
+ }
+ }
+ }
+ break;
+
+ default:
+ break;
+
+ }
+ }
+ }
+
+ /**
+ * DECSC - Save cursor.
+ */
+ private void decsc() {
+ savedState.setTo(currentState);
+ }
+
+ /**
+ * DECRC - Restore cursor.
+ */
+ private void decrc() {
+ currentState.setTo(savedState);
+ }
+
+ /**
+ * IND - Index.
+ */
+ private void ind() {
+ // Move the cursor and scroll if necessary. If at the bottom line
+ // already, a scroll up is supposed to be performed.
+ if (currentState.cursorY == scrollRegionBottom) {
+ scrollingRegionScrollUp(scrollRegionTop, scrollRegionBottom, 1);
+ }
+ cursorDown(1, true);
+ }
+
+ /**
+ * RI - Reverse index.
+ */
+ private void ri() {
+ // Move the cursor and scroll if necessary. If at the top line
+ // already, a scroll down is supposed to be performed.
+ if (currentState.cursorY == scrollRegionTop) {
+ scrollingRegionScrollDown(scrollRegionTop, scrollRegionBottom, 1);
+ }
+ cursorUp(1, true);
+ }
+
+ /**
+ * NEL - Next line.
+ */
+ private void nel() {
+ // Move the cursor and scroll if necessary. If at the bottom line
+ // already, a scroll up is supposed to be performed.
+ if (currentState.cursorY == scrollRegionBottom) {
+ scrollingRegionScrollUp(scrollRegionTop, scrollRegionBottom, 1);
+ }
+ cursorDown(1, true);
+
+ // Reset to the beginning of the next line
+ currentState.cursorX = 0;
+ }
+
+ /**
+ * DECKPAM - Keypad application mode.
+ */
+ private void deckpam() {
+ keypadMode = KeypadMode.Application;
+ }
+
+ /**
+ * DECKPNM - Keypad numeric mode.
+ */
+ private void deckpnm() {
+ keypadMode = KeypadMode.Numeric;
+ }
+
+ /**
+ * Move up n spaces.
+ *
+ * @param n number of spaces to move
+ * @param honorScrollRegion if true, then do nothing if the cursor is
+ * outside the scrolling region
+ */
+ private void cursorUp(final int n, final boolean honorScrollRegion) {
+ int top;
+
+ /*
+ * Special case: if a user moves the cursor from the right margin, we
+ * have to reset the VT100 right margin flag.
+ */
+ if (n > 0) {
+ wrapLineFlag = false;
+ }
+
+ for (int i = 0; i < n; i++) {
+ if (honorScrollRegion == true) {
+ // Honor the scrolling region
+ if ((currentState.cursorY < scrollRegionTop)
+ || (currentState.cursorY > scrollRegionBottom)
+ ) {
+ // Outside region, do nothing
+ return;
+ }
+ // Inside region, go up
+ top = scrollRegionTop;
+ } else {
+ // Non-scrolling case
+ top = 0;
+ }
+
+ if (currentState.cursorY > top) {
+ currentState.cursorY--;
+ }
+ }
+ }
+
+ /**
+ * Move down n spaces.
+ *
+ * @param n number of spaces to move
+ * @param honorScrollRegion if true, then do nothing if the cursor is
+ * outside the scrolling region
+ */
+ private void cursorDown(final int n, final boolean honorScrollRegion) {
+ int bottom;
+
+ /*
+ * Special case: if a user moves the cursor from the right margin, we
+ * have to reset the VT100 right margin flag.
+ */
+ if (n > 0) {
+ wrapLineFlag = false;
+ }
+
+ for (int i = 0; i < n; i++) {
+
+ if (honorScrollRegion == true) {
+ // Honor the scrolling region
+ if (currentState.cursorY > scrollRegionBottom) {
+ // Outside region, do nothing
+ return;
+ }
+ // Inside region, go down
+ bottom = scrollRegionBottom;
+ } else {
+ // Non-scrolling case
+ bottom = height - 1;
+ }
+
+ if (currentState.cursorY < bottom) {
+ currentState.cursorY++;
+ }
+ }
+ }
+
+ /**
+ * Move left n spaces.
+ *
+ * @param n number of spaces to move
+ * @param honorScrollRegion if true, then do nothing if the cursor is
+ * outside the scrolling region
+ */
+ private void cursorLeft(final int n, final boolean honorScrollRegion) {
+ /*
+ * Special case: if a user moves the cursor from the right margin, we
+ * have to reset the VT100 right margin flag.
+ */
+ if (n > 0) {
+ wrapLineFlag = false;
+ }
+
+ for (int i = 0; i < n; i++) {
+ if (honorScrollRegion == true) {
+ // Honor the scrolling region
+ if ((currentState.cursorY < scrollRegionTop)
+ || (currentState.cursorY > scrollRegionBottom)
+ ) {
+ // Outside region, do nothing
+ return;
+ }
+ }
+
+ if (currentState.cursorX > 0) {
+ currentState.cursorX--;
+ }
+ }
+ }
+
+ /**
+ * Move right n spaces.
+ *
+ * @param n number of spaces to move
+ * @param honorScrollRegion if true, then do nothing if the cursor is
+ * outside the scrolling region
+ */
+ private void cursorRight(final int n, final boolean honorScrollRegion) {
+ int rightMargin = this.rightMargin;
+
+ /*
+ * Special case: if a user moves the cursor from the right margin, we
+ * have to reset the VT100 right margin flag.
+ */
+ if (n > 0) {
+ wrapLineFlag = false;
+ }
+
+ if (display.get(currentState.cursorY).isDoubleWidth()) {
+ rightMargin = ((rightMargin + 1) / 2) - 1;
+ }
+
+ for (int i = 0; i < n; i++) {
+ if (honorScrollRegion == true) {
+ // Honor the scrolling region
+ if ((currentState.cursorY < scrollRegionTop)
+ || (currentState.cursorY > scrollRegionBottom)
+ ) {
+ // Outside region, do nothing
+ return;
+ }
+ }
+
+ if (currentState.cursorX < rightMargin) {
+ currentState.cursorX++;
+ }
+ }
+ }
+
+ /**
+ * Move cursor to (col, row) where (0, 0) is the top-left corner.
+ *
+ * @param row row to move to
+ * @param col column to move to
+ */
+ private void cursorPosition(int row, final int col) {
+ int rightMargin = this.rightMargin;
+
+ assert (col >= 0);
+ assert (row >= 0);
+
+ if (display.get(currentState.cursorY).isDoubleWidth()) {
+ rightMargin = ((rightMargin + 1) / 2) - 1;
+ }
+
+ // Set column number
+ currentState.cursorX = col;
+
+ // Sanity check, bring column back to margin.
+ if (currentState.cursorX > rightMargin) {
+ currentState.cursorX = rightMargin;
+ }
+
+ // Set row number
+ if (currentState.originMode == true) {
+ row += scrollRegionTop;
+ }
+ if (currentState.cursorY < row) {
+ cursorDown(row - currentState.cursorY, false);
+ } else if (currentState.cursorY > row) {
+ cursorUp(currentState.cursorY - row, false);
+ }
+
+ wrapLineFlag = false;
+ }
+
+ /**
+ * HTS - Horizontal tabulation set.
+ */
+ private void hts() {
+ for (Integer stop: tabStops) {
+ if (stop == currentState.cursorX) {
+ // Already have a tab stop here
+ return;
+ }
+ }
+
+ // Append a tab stop to the end of the array and resort them
+ tabStops.add(currentState.cursorX);
+ Collections.sort(tabStops);
+ }
+
+ /**
+ * DECSWL - Single-width line.
+ */
+ private void decswl() {
+ display.get(currentState.cursorY).setDoubleWidth(false);
+ display.get(currentState.cursorY).setDoubleHeight(0);
+ }
+
+ /**
+ * DECDWL - Double-width line.
+ */
+ private void decdwl() {
+ display.get(currentState.cursorY).setDoubleWidth(true);
+ display.get(currentState.cursorY).setDoubleHeight(0);
+ }
+
+ /**
+ * DECHDL - Double-height + double-width line.
+ *
+ * @param topHalf if true, this sets the row to be the top half row of a
+ * double-height row
+ */
+ private void dechdl(final boolean topHalf) {
+ display.get(currentState.cursorY).setDoubleWidth(true);
+ if (topHalf == true) {
+ display.get(currentState.cursorY).setDoubleHeight(1);
+ } else {
+ display.get(currentState.cursorY).setDoubleHeight(2);
+ }
+ }
+
+ /**
+ * DECALN - Screen alignment display.
+ */
+ private void decaln() {
+ Cell newCell = new Cell('E');
+ for (DisplayLine line: display) {
+ for (int i = 0; i < line.length(); i++) {
+ line.replace(i, newCell);
+ }
+ }
+ }
+
+ /**
+ * DECSCL - Compatibility level.
+ */
+ private void decscl() {
+ int i = getCsiParam(0, 0);
+ int j = getCsiParam(1, 0);
+
+ if (i == 61) {
+ // Reset fonts
+ currentState.g0Charset = CharacterSet.US;
+ currentState.g1Charset = CharacterSet.DRAWING;
+ s8c1t = false;
+ } else if (i == 62) {
+
+ if ((j == 0) || (j == 2)) {
+ s8c1t = true;
+ } else if (j == 1) {
+ s8c1t = false;
+ }
+ }
+ }
+
+ /**
+ * CUD - Cursor down.
+ */
+ private void cud() {
+ cursorDown(getCsiParam(0, 1, 1, height), true);
+ }
+
+ /**
+ * CUF - Cursor forward.
+ */
+ private void cuf() {
+ cursorRight(getCsiParam(0, 1, 1, rightMargin + 1), true);
+ }
+
+ /**
+ * CUB - Cursor backward.
+ */
+ private void cub() {
+ cursorLeft(getCsiParam(0, 1, 1, currentState.cursorX + 1), true);
+ }
+
+ /**
+ * CUU - Cursor up.
+ */
+ private void cuu() {
+ cursorUp(getCsiParam(0, 1, 1, currentState.cursorY + 1), true);
+ }
+
+ /**
+ * CUP - Cursor position.
+ */
+ private void cup() {
+ cursorPosition(getCsiParam(0, 1, 1, height) - 1,
+ getCsiParam(1, 1, 1, rightMargin + 1) - 1);
+ }
+
+ /**
+ * CNL - Cursor down and to column 1.
+ */
+ private void cnl() {
+ cursorDown(getCsiParam(0, 1, 1, height), true);
+ // To column 0
+ cursorLeft(currentState.cursorX, true);
+ }
+
+ /**
+ * CPL - Cursor up and to column 1.
+ */
+ private void cpl() {
+ cursorUp(getCsiParam(0, 1, 1, currentState.cursorY + 1), true);
+ // To column 0
+ cursorLeft(currentState.cursorX, true);
+ }
+
+ /**
+ * CHA - Cursor to column # in current row.
+ */
+ private void cha() {
+ cursorPosition(currentState.cursorY,
+ getCsiParam(0, 1, 1, rightMargin + 1) - 1);
+ }
+
+ /**
+ * VPA - Cursor to row #, same column.
+ */
+ private void vpa() {
+ cursorPosition(getCsiParam(0, 1, 1, height) - 1,
+ currentState.cursorX);
+ }
+
+ /**
+ * ED - Erase in display.
+ */
+ private void ed() {
+ boolean honorProtected = false;
+ boolean decPrivateModeFlag = false;
+
+ for (int i = 0; i < collectBuffer.length(); i++) {
+ if (collectBuffer.charAt(i) == '?') {
+ decPrivateModeFlag = true;
+ break;
+ }
+ }
+
+ if (((type == DeviceType.VT220) || (type == DeviceType.XTERM))
+ && (decPrivateModeFlag == true)
+ ) {
+ honorProtected = true;
+ }
+
+ int i = getCsiParam(0, 0);
+
+ if (i == 0) {
+ // Erase from here to end of screen
+ if (currentState.cursorY < height - 1) {
+ eraseScreen(currentState.cursorY + 1, 0, height - 1, width - 1,
+ honorProtected);
+ }
+ eraseLine(currentState.cursorX, width - 1, honorProtected);
+ } else if (i == 1) {
+ // Erase from beginning of screen to here
+ eraseScreen(0, 0, currentState.cursorY - 1, width - 1,
+ honorProtected);
+ eraseLine(0, currentState.cursorX, honorProtected);
+ } else if (i == 2) {
+ // Erase entire screen
+ eraseScreen(0, 0, height - 1, width - 1, honorProtected);
+ }
+ }
+
+ /**
+ * EL - Erase in line.
+ */
+ private void el() {
+ boolean honorProtected = false;
+ boolean decPrivateModeFlag = false;
+
+ for (int i = 0; i < collectBuffer.length(); i++) {
+ if (collectBuffer.charAt(i) == '?') {
+ decPrivateModeFlag = true;
+ break;
+ }
+ }
+
+ if (((type == DeviceType.VT220) || (type == DeviceType.XTERM))
+ && (decPrivateModeFlag == true)
+ ) {
+ honorProtected = true;
+ }
+
+ int i = getCsiParam(0, 0);
+
+ if (i == 0) {
+ // Erase from here to end of line
+ eraseLine(currentState.cursorX, width - 1, honorProtected);
+ } else if (i == 1) {
+ // Erase from beginning of line to here
+ eraseLine(0, currentState.cursorX, honorProtected);
+ } else if (i == 2) {
+ // Erase entire line
+ eraseLine(0, width - 1, honorProtected);
+ }
+ }
+
+ /**
+ * ECH - Erase # of characters in current row.
+ */
+ private void ech() {
+ int i = getCsiParam(0, 1, 1, width);
+
+ // Erase from here to i characters
+ eraseLine(currentState.cursorX, currentState.cursorX + i - 1, false);
+ }
+
+ /**
+ * IL - Insert line.
+ */
+ private void il() {
+ int i = getCsiParam(0, 1);
+
+ if ((currentState.cursorY >= scrollRegionTop)
+ && (currentState.cursorY <= scrollRegionBottom)
+ ) {
+
+ // I can get the same effect with a scroll-down
+ scrollingRegionScrollDown(currentState.cursorY,
+ scrollRegionBottom, i);
+ }
+ }
+
+ /**
+ * DCH - Delete char.
+ */
+ private void dch() {
+ int n = getCsiParam(0, 1);
+ DisplayLine line = display.get(currentState.cursorY);
+ Cell blank = new Cell();
+ for (int i = 0; i < n; i++) {
+ line.delete(currentState.cursorX, blank);
+ }
+ }
+
+ /**
+ * ICH - Insert blank char at cursor.
+ */
+ private void ich() {
+ int n = getCsiParam(0, 1);
+ DisplayLine line = display.get(currentState.cursorY);
+ Cell blank = new Cell();
+ for (int i = 0; i < n; i++) {
+ line.insert(currentState.cursorX, blank);
+ }
+ }
+
+ /**
+ * DL - Delete line.
+ */
+ private void dl() {
+ int i = getCsiParam(0, 1);
+
+ if ((currentState.cursorY >= scrollRegionTop)
+ && (currentState.cursorY <= scrollRegionBottom)) {
+
+ // I can get the same effect with a scroll-down
+ scrollingRegionScrollUp(currentState.cursorY,
+ scrollRegionBottom, i);
+ }
+ }
+
+ /**
+ * HVP - Horizontal and vertical position.
+ */
+ private void hvp() {
+ cup();
+ }
+
+ /**
+ * REP - Repeat character.
+ */
+ private void rep() {
+ int n = getCsiParam(0, 1);
+ for (int i = 0; i < n; i++) {
+ printCharacter(repCh);
+ }
+ }
+
+ /**
+ * SU - Scroll up.
+ */
+ private void su() {
+ scrollingRegionScrollUp(scrollRegionTop, scrollRegionBottom,
+ getCsiParam(0, 1, 1, height));
+ }
+
+ /**
+ * SD - Scroll down.
+ */
+ private void sd() {
+ scrollingRegionScrollDown(scrollRegionTop, scrollRegionBottom,
+ getCsiParam(0, 1, 1, height));
+ }
+
+ /**
+ * CBT - Go back X tab stops.
+ */
+ private void cbt() {
+ int tabsToMove = getCsiParam(0, 1);
+ int tabI;
+
+ for (int i = 0; i < tabsToMove; i++) {
+ int j = currentState.cursorX;
+ for (tabI = 0; tabI < tabStops.size(); tabI++) {
+ if (tabStops.get(tabI) >= currentState.cursorX) {
+ break;
+ }
+ }
+ tabI--;
+ if (tabI <= 0) {
+ j = 0;
+ } else {
+ j = tabStops.get(tabI);
+ }
+ cursorPosition(currentState.cursorY, j);
+ }
+ }
+
+ /**
+ * CHT - Advance X tab stops.
+ */
+ private void cht() {
+ int n = getCsiParam(0, 1);
+ for (int i = 0; i < n; i++) {
+ advanceToNextTabStop();
+ }
+ }
+
+ /**
+ * SGR - Select graphics rendition.
+ */
+ private void sgr() {
+
+ if (csiParams.size() == 0) {
+ currentState.attr.reset();
+ return;
+ }
+
+ int sgrColorMode = -1;
+ boolean idx88Color = false;
+ boolean rgbColor = false;
+ int rgbRed = -1;
+ int rgbGreen = -1;
+
+ for (Integer i: csiParams) {
+
+ if ((sgrColorMode == 38) || (sgrColorMode == 48)) {
+
+ assert (type == DeviceType.XTERM);
+
+ if (idx88Color) {
+ /*
+ * Indexed color mode, we now have the index number.
+ */
+ if (sgrColorMode == 38) {
+ currentState.attr.setForeColorRGB(get88Color(i));
+ } else {
+ assert (sgrColorMode == 48);
+ currentState.attr.setBackColorRGB(get88Color(i));
+ }
+ sgrColorMode = -1;
+ idx88Color = false;
+ continue;
+ }
+
+ if (rgbColor) {
+ /*
+ * RGB color mode, we are collecting tokens.
+ */
+ if (rgbRed == -1) {
+ rgbRed = i & 0xFF;
+ } else if (rgbGreen == -1) {
+ rgbGreen = i & 0xFF;
+ } else {
+ int rgb = rgbRed << 16;
+ rgb |= rgbGreen << 8;
+ rgb |= i & 0xFF;
+
+ // System.err.printf("RGB: %08x\n", rgb);
+
+ if (sgrColorMode == 38) {
+ currentState.attr.setForeColorRGB(rgb);
+ } else {
+ assert (sgrColorMode == 48);
+ currentState.attr.setBackColorRGB(rgb);
+ }
+ rgbRed = -1;
+ rgbGreen = -1;
+ sgrColorMode = -1;
+ rgbColor = false;
+ }
+ continue;
+ }
+
+ switch (i) {
+
+ case 2:
+ /*
+ * RGB color mode.
+ */
+ rgbColor = true;
+ break;
+
+ case 5:
+ /*
+ * Indexed color mode.
+ */
+ idx88Color = true;
+ break;
+
+ default:
+ /*
+ * This is neither indexed nor RGB color. Bail out.
+ */
+ return;
+ }
+
+ } // if ((sgrColorMode == 38) || (sgrColorMode == 48))
+
+ switch (i) {
+
+ case 0:
+ // Normal
+ currentState.attr.reset();
+ break;
+
+ case 1:
+ // Bold
+ currentState.attr.setBold(true);
+ break;
+
+ case 4:
+ // Underline
+ currentState.attr.setUnderline(true);
+ break;
+
+ case 5:
+ // Blink
+ currentState.attr.setBlink(true);
+ break;
+
+ case 7:
+ // Reverse
+ currentState.attr.setReverse(true);
+ break;
+
+ default:
+ break;
+ }
+
+ if (type == DeviceType.XTERM) {
+
+ switch (i) {
+
+ case 8:
+ // Invisible
+ // TODO
+ break;
+
+ case 90:
+ // Set black foreground
+ currentState.attr.setForeColorRGB(get88Color(8));
+ break;
+ case 91:
+ // Set red foreground
+ currentState.attr.setForeColorRGB(get88Color(9));
+ break;
+ case 92:
+ // Set green foreground
+ currentState.attr.setForeColorRGB(get88Color(10));
+ break;
+ case 93:
+ // Set yellow foreground
+ currentState.attr.setForeColorRGB(get88Color(11));
+ break;
+ case 94:
+ // Set blue foreground
+ currentState.attr.setForeColorRGB(get88Color(12));
+ break;
+ case 95:
+ // Set magenta foreground
+ currentState.attr.setForeColorRGB(get88Color(13));
+ break;
+ case 96:
+ // Set cyan foreground
+ currentState.attr.setForeColorRGB(get88Color(14));
+ break;
+ case 97:
+ // Set white foreground
+ currentState.attr.setForeColorRGB(get88Color(15));
+ break;
+
+ case 100:
+ // Set black background
+ currentState.attr.setBackColorRGB(get88Color(8));
+ break;
+ case 101:
+ // Set red background
+ currentState.attr.setBackColorRGB(get88Color(9));
+ break;
+ case 102:
+ // Set green background
+ currentState.attr.setBackColorRGB(get88Color(10));
+ break;
+ case 103:
+ // Set yellow background
+ currentState.attr.setBackColorRGB(get88Color(11));
+ break;
+ case 104:
+ // Set blue background
+ currentState.attr.setBackColorRGB(get88Color(12));
+ break;
+ case 105:
+ // Set magenta background
+ currentState.attr.setBackColorRGB(get88Color(13));
+ break;
+ case 106:
+ // Set cyan background
+ currentState.attr.setBackColorRGB(get88Color(14));
+ break;
+ case 107:
+ // Set white background
+ currentState.attr.setBackColorRGB(get88Color(15));
+ break;
+
+ default:
+ break;
+ }
+ }
+
+ if ((type == DeviceType.VT220)
+ || (type == DeviceType.XTERM)) {
+
+ switch (i) {
+
+ case 22:
+ // Normal intensity
+ currentState.attr.setBold(false);
+ break;
+
+ case 24:
+ // No underline
+ currentState.attr.setUnderline(false);
+ break;
+
+ case 25:
+ // No blink
+ currentState.attr.setBlink(false);
+ break;
+
+ case 27:
+ // Un-reverse
+ currentState.attr.setReverse(false);
+ break;
+
+ default:
+ break;
+ }
+ }
+
+ // A true VT100/102/220 does not support color, however everyone
+ // is used to their terminal emulator supporting color so we will
+ // unconditionally support color for all DeviceType's.
+
+ switch (i) {
+
+ case 30:
+ // Set black foreground
+ currentState.attr.setForeColor(Color.BLACK);
+ currentState.attr.setForeColorRGB(-1);
+ break;
+ case 31:
+ // Set red foreground
+ currentState.attr.setForeColor(Color.RED);
+ currentState.attr.setForeColorRGB(-1);
+ break;
+ case 32:
+ // Set green foreground
+ currentState.attr.setForeColor(Color.GREEN);
+ currentState.attr.setForeColorRGB(-1);
+ break;
+ case 33:
+ // Set yellow foreground
+ currentState.attr.setForeColor(Color.YELLOW);
+ currentState.attr.setForeColorRGB(-1);
+ break;
+ case 34:
+ // Set blue foreground
+ currentState.attr.setForeColor(Color.BLUE);
+ currentState.attr.setForeColorRGB(-1);
+ break;
+ case 35:
+ // Set magenta foreground
+ currentState.attr.setForeColor(Color.MAGENTA);
+ currentState.attr.setForeColorRGB(-1);
+ break;
+ case 36:
+ // Set cyan foreground
+ currentState.attr.setForeColor(Color.CYAN);
+ currentState.attr.setForeColorRGB(-1);
+ break;
+ case 37:
+ // Set white foreground
+ currentState.attr.setForeColor(Color.WHITE);
+ currentState.attr.setForeColorRGB(-1);
+ break;
+ case 38:
+ if (type == DeviceType.XTERM) {
+ /*
+ * Xterm supports T.416 / ISO-8613-3 codes to select
+ * either an indexed color or an RGB value. (It also
+ * permits these ISO-8613-3 SGR sequences to be separated
+ * by colons rather than semicolons.)
+ *
+ * We will support only the following:
+ *
+ * 1. Indexed color mode (88- or 256-color modes).
+ *
+ * 2. Direct RGB.
+ *
+ * These cover most of the use cases in the real world.
+ *
+ * HOWEVER, note that this is an awful broken "standard",
+ * with no way to do it "right". See
+ * http://invisible-island.net/ncurses/ncurses.faq.html#xterm_16MegaColors
+ * for a detailed discussion of the current state of RGB
+ * in various terminals, the point of which is that none
+ * of them really do the same thing despite all appearing
+ * to be "xterm".
+ *
+ * Also see
+ * https://bugs.kde.org/show_bug.cgi?id=107487#c3 .
+ * where it is assumed that supporting just the "indexed
+ * mode" of these sequences (which could align easily
+ * with existing SGR colors) is assumed to mean full
+ * support of 24-bit RGB. So it is all or nothing.
+ *
+ * Finally, these sequences break the assumptions of
+ * standard ECMA-48 style parsers as pointed out at
+ * https://bugs.kde.org/show_bug.cgi?id=107487#c11 .
+ * Therefore in order to keep a clean display, we cannot
+ * parse anything else in this sequence.
+ */
+ sgrColorMode = 38;
+ continue;
+ } else {
+ // Underscore on, default foreground color
+ currentState.attr.setUnderline(true);
+ currentState.attr.setForeColor(Color.WHITE);
+ }
+ break;
+ case 39:
+ // Underscore off, default foreground color
+ currentState.attr.setUnderline(false);
+ currentState.attr.setForeColor(Color.WHITE);
+ currentState.attr.setForeColorRGB(-1);
+ break;
+ case 40:
+ // Set black background
+ currentState.attr.setBackColor(Color.BLACK);
+ currentState.attr.setBackColorRGB(-1);
+ break;
+ case 41:
+ // Set red background
+ currentState.attr.setBackColor(Color.RED);
+ currentState.attr.setBackColorRGB(-1);
+ break;
+ case 42:
+ // Set green background
+ currentState.attr.setBackColor(Color.GREEN);
+ currentState.attr.setBackColorRGB(-1);
+ break;
+ case 43:
+ // Set yellow background
+ currentState.attr.setBackColor(Color.YELLOW);
+ currentState.attr.setBackColorRGB(-1);
+ break;
+ case 44:
+ // Set blue background
+ currentState.attr.setBackColor(Color.BLUE);
+ currentState.attr.setBackColorRGB(-1);
+ break;
+ case 45:
+ // Set magenta background
+ currentState.attr.setBackColor(Color.MAGENTA);
+ currentState.attr.setBackColorRGB(-1);
+ break;
+ case 46:
+ // Set cyan background
+ currentState.attr.setBackColor(Color.CYAN);
+ currentState.attr.setBackColorRGB(-1);
+ break;
+ case 47:
+ // Set white background
+ currentState.attr.setBackColor(Color.WHITE);
+ currentState.attr.setBackColorRGB(-1);
+ break;
+ case 48:
+ if (type == DeviceType.XTERM) {
+ /*
+ * Xterm supports T.416 / ISO-8613-3 codes to select
+ * either an indexed color or an RGB value. (It also
+ * permits these ISO-8613-3 SGR sequences to be separated
+ * by colons rather than semicolons.)
+ *
+ * We will support only the following:
+ *
+ * 1. Indexed color mode (88- or 256-color modes).
+ *
+ * 2. Direct RGB.
+ *
+ * These cover most of the use cases in the real world.
+ *
+ * HOWEVER, note that this is an awful broken "standard",
+ * with no way to do it "right". See
+ * http://invisible-island.net/ncurses/ncurses.faq.html#xterm_16MegaColors
+ * for a detailed discussion of the current state of RGB
+ * in various terminals, the point of which is that none
+ * of them really do the same thing despite all appearing
+ * to be "xterm".
+ *
+ * Also see
+ * https://bugs.kde.org/show_bug.cgi?id=107487#c3 .
+ * where it is assumed that supporting just the "indexed
+ * mode" of these sequences (which could align easily
+ * with existing SGR colors) is assumed to mean full
+ * support of 24-bit RGB. So it is all or nothing.
+ *
+ * Finally, these sequences break the assumptions of
+ * standard ECMA-48 style parsers as pointed out at
+ * https://bugs.kde.org/show_bug.cgi?id=107487#c11 .
+ * Therefore in order to keep a clean display, we cannot
+ * parse anything else in this sequence.
+ */
+ sgrColorMode = 48;
+ continue;
+ }
+ break;
+ case 49:
+ // Default background
+ currentState.attr.setBackColor(Color.BLACK);
+ currentState.attr.setBackColorRGB(-1);
+ break;
+
+ default:
+ break;
+ }
+ }
+ }
+
+ /**
+ * DA - Device attributes.
+ */
+ private void da() {
+ int extendedFlag = 0;
+ int i = 0;
+ if (collectBuffer.length() > 0) {
+ String args = collectBuffer.substring(1);
+ if (collectBuffer.charAt(0) == '>') {
+ extendedFlag = 1;
+ if (collectBuffer.length() >= 2) {
+ i = Integer.parseInt(args);
+ }
+ } else if (collectBuffer.charAt(0) == '=') {
+ extendedFlag = 2;
+ if (collectBuffer.length() >= 2) {
+ i = Integer.parseInt(args);
+ }
+ } else {
+ // Unknown code, bail out
+ return;
+ }
+ }
+
+ if ((i != 0) && (i != 1)) {
+ return;
+ }
+
+ if ((extendedFlag == 0) && (i == 0)) {
+ // Send string directly to remote side
+ writeRemote(deviceTypeResponse());
+ return;
+ }
+
+ if ((type == DeviceType.VT220) || (type == DeviceType.XTERM)) {
+
+ if ((extendedFlag == 1) && (i == 0)) {
+ /*
+ * Request "What type of terminal are you, what is your
+ * firmware version, and what hardware options do you have
+ * installed?"
+ *
+ * Respond: "I am a VT220 (identification code of 1), my
+ * firmware version is _____ (Pv), and I have _____ Po
+ * options installed."
+ *
+ * (Same as xterm)
+ *
+ */
+
+ if (s8c1t == true) {
+ writeRemote("\u009b>1;10;0c");
+ } else {
+ writeRemote("\033[>1;10;0c");
+ }
+ }
+ }
+
+ // VT420 and up
+ if ((extendedFlag == 2) && (i == 0)) {
+
+ /*
+ * Request "What is your unit ID?"
+ *
+ * Respond: "I was manufactured at site 00 and have a unique ID
+ * number of 123."
+ *
+ */
+ writeRemote("\033P!|00010203\033\\");
+ }
+ }
+
+ /**
+ * DECSTBM - Set top and bottom margins.
+ */
+ private void decstbm() {
+ boolean decPrivateModeFlag = false;
+
+ for (int i = 0; i < collectBuffer.length(); i++) {
+ if (collectBuffer.charAt(i) == '?') {
+ decPrivateModeFlag = true;
+ break;
+ }
+ }
+ if (decPrivateModeFlag) {
+ // This could be restore DEC private mode values.
+ // Ignore it.
+ } else {
+ // DECSTBM
+ int top = getCsiParam(0, 1, 1, height) - 1;
+ int bottom = getCsiParam(1, height, 1, height) - 1;
+
+ if (top > bottom) {
+ top = bottom;
+ }
+ scrollRegionTop = top;
+ scrollRegionBottom = bottom;
+
+ // Home cursor
+ cursorPosition(0, 0);
+ }
+ }
+
+ /**
+ * DECREQTPARM - Request terminal parameters.
+ */
+ private void decreqtparm() {
+ int i = getCsiParam(0, 0);
+
+ if ((i != 0) && (i != 1)) {
+ return;
+ }
+
+ String str = "";
+
+ /*
+ * Request terminal parameters.
+ *
+ * Respond with:
+ *
+ * Parity NONE, 8 bits, xmitspeed 38400, recvspeed 38400.
+ * (CLoCk MULtiplier = 1, STP option flags = 0)
+ *
+ * (Same as xterm)
+ */
+ if (((type == DeviceType.VT220) || (type == DeviceType.XTERM))
+ && (s8c1t == true)
+ ) {
+ str = String.format("\u009b%d;1;1;128;128;1;0x", i + 2);
+ } else {
+ str = String.format("\033[%d;1;1;128;128;1;0x", i + 2);
+ }
+ writeRemote(str);
+ }
+
+ /**
+ * DECSCA - Select Character Attributes.
+ */
+ private void decsca() {
+ int i = getCsiParam(0, 0);
+
+ if ((i == 0) || (i == 2)) {
+ // Protect mode OFF
+ currentState.attr.setProtect(false);
+ }
+ if (i == 1) {
+ // Protect mode ON
+ currentState.attr.setProtect(true);
+ }
+ }
+
+ /**
+ * DECSTR - Soft Terminal Reset.
+ */
+ private void decstr() {
+ // Do exactly like RIS - Reset to initial state
+ reset();
+ // Do I clear screen too? I think so...
+ eraseScreen(0, 0, height - 1, width - 1, false);
+ cursorPosition(0, 0);
+ }
+
+ /**
+ * DSR - Device status report.
+ */
+ private void dsr() {
+ boolean decPrivateModeFlag = false;
+ int row = currentState.cursorY;
+
+ for (int i = 0; i < collectBuffer.length(); i++) {
+ if (collectBuffer.charAt(i) == '?') {
+ decPrivateModeFlag = true;
+ break;
+ }
+ }
+
+ int i = getCsiParam(0, 0);
+
+ switch (i) {
+
+ case 5:
+ // Request status report. Respond with "OK, no malfunction."
+
+ // Send string directly to remote side
+ if (((type == DeviceType.VT220) || (type == DeviceType.XTERM))
+ && (s8c1t == true)
+ ) {
+ writeRemote("\u009b0n");
+ } else {
+ writeRemote("\033[0n");
+ }
+ break;
+
+ case 6:
+ // Request cursor position. Respond with current position.
+ if (currentState.originMode == true) {
+ row -= scrollRegionTop;
+ }
+ String str = "";
+ if (((type == DeviceType.VT220) || (type == DeviceType.XTERM))
+ && (s8c1t == true)
+ ) {
+ str = String.format("\u009b%d;%dR", row + 1,
+ currentState.cursorX + 1);
+ } else {
+ str = String.format("\033[%d;%dR", row + 1,
+ currentState.cursorX + 1);
+ }
+
+ // Send string directly to remote side
+ writeRemote(str);
+ break;
+
+ case 15:
+ if (decPrivateModeFlag == true) {
+
+ // Request printer status report. Respond with "Printer not
+ // connected."
+
+ if (((type == DeviceType.VT220) || (type == DeviceType.XTERM))
+ && (s8c1t == true)) {
+ writeRemote("\u009b?13n");
+ } else {
+ writeRemote("\033[?13n");
+ }
+ }
+ break;
+
+ case 25:
+ if (((type == DeviceType.VT220) || (type == DeviceType.XTERM))
+ && (decPrivateModeFlag == true)
+ ) {
+
+ // Request user-defined keys are locked or unlocked. Respond
+ // with "User-defined keys are locked."
+
+ if (s8c1t == true) {
+ writeRemote("\u009b?21n");
+ } else {
+ writeRemote("\033[?21n");
+ }
+ }
+ break;
+
+ case 26:
+ if (((type == DeviceType.VT220) || (type == DeviceType.XTERM))
+ && (decPrivateModeFlag == true)
+ ) {
+
+ // Request keyboard language. Respond with "Keyboard
+ // language is North American."
+
+ if (s8c1t == true) {
+ writeRemote("\u009b?27;1n");
+ } else {
+ writeRemote("\033[?27;1n");
+ }
+
+ }
+ break;
+
+ default:
+ // Some other option, ignore
+ break;
+ }
+ }
+
+ /**
+ * TBC - Tabulation clear.
+ */
+ private void tbc() {
+ int i = getCsiParam(0, 0);
+ if (i == 0) {
+ List<Integer> newStops = new ArrayList<Integer>();
+ for (Integer stop: tabStops) {
+ if (stop == currentState.cursorX) {
+ continue;
+ }
+ newStops.add(stop);
+ }
+ tabStops = newStops;
+ }
+ if (i == 3) {
+ tabStops.clear();
+ }
+ }
+
+ /**
+ * Erase the characters in the current line from the start column to the
+ * end column, inclusive.
+ *
+ * @param start starting column to erase (between 0 and width - 1)
+ * @param end ending column to erase (between 0 and width - 1)
+ * @param honorProtected if true, do not erase characters with the
+ * protected attribute set
+ */
+ private void eraseLine(int start, int end, final boolean honorProtected) {
+
+ if (start > end) {
+ return;
+ }
+ if (end > width - 1) {
+ end = width - 1;
+ }
+ if (start < 0) {
+ start = 0;
+ }
+
+ for (int i = start; i <= end; i++) {
+ DisplayLine line = display.get(currentState.cursorY);
+ if ((!honorProtected)
+ || ((honorProtected) && (!line.charAt(i).isProtect()))) {
+
+ switch (type) {
+ case VT100:
+ case VT102:
+ case VT220:
+ /*
+ * From the VT102 manual:
+ *
+ * Erasing a character also erases any character
+ * attribute of the character.
+ */
+ line.setBlank(i);
+ break;
+ case XTERM:
+ /*
+ * Erase with the current color a.k.a. back-color erase
+ * (bce).
+ */
+ line.setChar(i, ' ');
+ line.setAttr(i, currentState.attr);
+ break;
+ }
+ }
+ }
+ }
+
+ /**
+ * Erase a rectangular section of the screen, inclusive. end column,
+ * inclusive.
+ *
+ * @param startRow starting row to erase (between 0 and height - 1)
+ * @param startCol starting column to erase (between 0 and width - 1)
+ * @param endRow ending row to erase (between 0 and height - 1)
+ * @param endCol ending column to erase (between 0 and width - 1)
+ * @param honorProtected if true, do not erase characters with the
+ * protected attribute set
+ */
+ private void eraseScreen(final int startRow, final int startCol,
+ final int endRow, final int endCol, final boolean honorProtected) {
+
+ int oldCursorY;
+
+ if ((startRow < 0)
+ || (startCol < 0)
+ || (endRow < 0)
+ || (endCol < 0)
+ || (endRow < startRow)
+ || (endCol < startCol)
+ ) {
+ return;
+ }
+
+ oldCursorY = currentState.cursorY;
+ for (int i = startRow; i <= endRow; i++) {
+ currentState.cursorY = i;
+ eraseLine(startCol, endCol, honorProtected);
+
+ // Erase display clears the double attributes
+ display.get(i).setDoubleWidth(false);
+ display.get(i).setDoubleHeight(0);
+ }
+ currentState.cursorY = oldCursorY;
+ }
+
+ /**
+ * VT220 printer functions. All of these are parsed, but won't do
+ * anything.
+ */
+ private void printerFunctions() {
+ boolean decPrivateModeFlag = false;
+ for (int i = 0; i < collectBuffer.length(); i++) {
+ if (collectBuffer.charAt(i) == '?') {
+ decPrivateModeFlag = true;
+ break;
+ }
+ }
+
+ int i = getCsiParam(0, 0);
+
+ switch (i) {
+
+ case 0:
+ if (decPrivateModeFlag == false) {
+ // Print screen
+ }
+ break;
+
+ case 1:
+ if (decPrivateModeFlag == true) {
+ // Print cursor line
+ }
+ break;
+
+ case 4:
+ if (decPrivateModeFlag == true) {
+ // Auto print mode OFF
+ } else {
+ // Printer controller OFF
+
+ // Characters re-appear on the screen
+ printerControllerMode = false;
+ }
+ break;
+
+ case 5:
+ if (decPrivateModeFlag == true) {
+ // Auto print mode
+
+ } else {
+ // Printer controller
+
+ // Characters get sucked into oblivion
+ printerControllerMode = true;
+ }
+ break;
+
+ default:
+ break;
+
+ }
+ }
+
+ /**
+ * Handle the SCAN_OSC_STRING state. Handle this in VT100 because lots
+ * of remote systems will send an XTerm title sequence even if TERM isn't
+ * xterm.
+ *
+ * @param xtermChar the character received from the remote side
+ */
+ private void oscPut(final char xtermChar) {
+ // System.err.println("oscPut: " + xtermChar);
+
+ // Collect first
+ collectBuffer.append(xtermChar);
+
+ // Xterm cases...
+ if ((xtermChar == 0x07)
+ || (collectBuffer.toString().endsWith("\033\\"))
+ ) {
+ String args = null;
+ if (xtermChar == 0x07) {
+ args = collectBuffer.substring(0, collectBuffer.length() - 1);
+ } else {
+ args = collectBuffer.substring(0, collectBuffer.length() - 2);
+ }
+
+ String [] p = args.split(";");
+ if (p.length > 0) {
+ if ((p[0].equals("0")) || (p[0].equals("2"))) {
+ if (p.length > 1) {
+ // Screen title
+ screenTitle = p[1];
+ }
+ }
+
+ if (p[0].equals("4")) {
+ for (int i = 1; i + 1 < p.length; i += 2) {
+ // Set a color index value
+ try {
+ set88Color(Integer.parseInt(p[i]), p[i + 1]);
+ } catch (NumberFormatException e) {
+ // SQUASH
+ }
+ }
+ }
+
+ if (p[0].equals("10")) {
+ if (p[1].equals("?")) {
+ // Respond with foreground color.
+ java.awt.Color color = jexer.backend.SwingTerminal.attrToForegroundColor(currentState.attr);
+
+ writeRemote(String.format(
+ "\033]10;rgb:%04x/%04x/%04x\033\\",
+ color.getRed() << 8,
+ color.getGreen() << 8,
+ color.getBlue() << 8));
+ }
+ }
+
+ if (p[0].equals("11")) {
+ if (p[1].equals("?")) {
+ // Respond with background color.
+ java.awt.Color color = jexer.backend.SwingTerminal.attrToBackgroundColor(currentState.attr);
+
+ writeRemote(String.format(
+ "\033]11;rgb:%04x/%04x/%04x\033\\",
+ color.getRed() << 8,
+ color.getGreen() << 8,
+ color.getBlue() << 8));
+ }
+ }
+
+ if (p[0].equals("444") && (p.length == 5)) {
+ // Jexer image
+ parseJexerImage(p[1], p[2], p[3], p[4]);
+ }
+
+ }
+
+ // Go to SCAN_GROUND state
+ toGround();
+ return;
+ }
+ }
+
+ /**
+ * Handle the SCAN_SOSPMAPC_STRING state. This is currently only used by
+ * Jexer ECMA48Terminal to talk to ECMA48.
+ *
+ * @param pmChar the character received from the remote side
+ */
+ private void pmPut(final char pmChar) {
+ // System.err.println("pmPut: " + pmChar);
+
+ // Collect first
+ collectBuffer.append(pmChar);
+
+ // Xterm cases...
+ if (collectBuffer.toString().endsWith("\033\\")) {
+ String arg = null;
+ arg = collectBuffer.substring(0, collectBuffer.length() - 2);
+
+ // System.err.println("arg: '" + arg + "'");
+
+ if (arg.equals("hideMousePointer")) {
+ hideMousePointer = true;
+ }
+ if (arg.equals("showMousePointer")) {
+ hideMousePointer = false;
+ }
+
+ // Go to SCAN_GROUND state
+ toGround();
+ return;
+ }
+ }
+
+ /**
+ * Perform xterm window operations.
+ */
+ private void xtermWindowOps() {
+ boolean xtermPrivateModeFlag = false;
+
+ for (int i = 0; i < collectBuffer.length(); i++) {
+ if (collectBuffer.charAt(i) == '?') {
+ xtermPrivateModeFlag = true;
+ break;
+ }
+ }
+
+ int i = getCsiParam(0, 0);
+
+ if (!xtermPrivateModeFlag) {
+ switch (i) {
+ case 14:
+ // Report xterm text area size in pixels as CSI 4 ; height ;
+ // width t
+ writeRemote(String.format("\033[4;%d;%dt", textHeight * height,
+ textWidth * width));
+ break;
+ case 16:
+ // Report character size in pixels as CSI 6 ; height ; width
+ // t
+ writeRemote(String.format("\033[6;%d;%dt", textHeight,
+ textWidth));
+ break;
+ case 18:
+ // Report the text are size in characters as CSI 8 ; height ;
+ // width t
+ writeRemote(String.format("\033[8;%d;%dt", height, width));
+ break;
+ default:
+ break;
+ }
+ }
+ }
+
+ /**
+ * Respond to xterm sixel query.
+ */
+ private void xtermSixelQuery() {
+ int item = getCsiParam(0, 0);
+ int action = getCsiParam(1, 0);
+ int value = getCsiParam(2, 0);
+
+ switch (item) {
+ case 1:
+ if (action == 1) {
+ // Report number of color registers.
+ writeRemote(String.format("\033[?%d;%d;%dS", item, 0, 1024));
+ return;
+ }
+ break;
+ default:
+ break;
+ }
+ // We will not support this option.
+ writeRemote(String.format("\033[?%d;%dS", item, action));
+ }
+
+ /**
+ * Run this input character through the ECMA48 state machine.
+ *
+ * @param ch character from the remote side
+ */
+ private void consume(int ch) {
+
+ // DEBUG
+ // System.err.printf("%c STATE = %s\n", ch, scanState);
+
+ // Special case for VT10x: 7-bit characters only
+ if ((type == DeviceType.VT100) || (type == DeviceType.VT102)) {
+ ch = (ch & 0x7F);
+ }
+
+ // Special "anywhere" states
+
+ // 18, 1A --> execute, then switch to SCAN_GROUND
+ if ((ch == 0x18) || (ch == 0x1A)) {
+ // CAN and SUB abort escape sequences
+ toGround();
+ return;
+ }
+
+ // 80-8F, 91-97, 99, 9A, 9C --> execute, then switch to SCAN_GROUND
+
+ // 0x1B == ESCAPE
+ if (ch == 0x1B) {
+ if ((type == DeviceType.XTERM)
+ && ((scanState == ScanState.OSC_STRING)
+ || (scanState == ScanState.DCS_SIXEL)
+ || (scanState == ScanState.SOSPMAPC_STRING))
+ ) {
+ // Xterm can pass ESCAPE to its OSC sequence.
+ // Xterm can pass ESCAPE to its DCS sequence.
+ // Jexer can pass ESCAPE to its PM sequence.
+ } else if ((scanState != ScanState.DCS_ENTRY)
+ && (scanState != ScanState.DCS_INTERMEDIATE)
+ && (scanState != ScanState.DCS_IGNORE)
+ && (scanState != ScanState.DCS_PARAM)
+ && (scanState != ScanState.DCS_PASSTHROUGH)
+ ) {
+ scanState = ScanState.ESCAPE;
+ return;
+ }
+ }
+
+ // 0x9B == CSI 8-bit sequence
+ if (ch == 0x9B) {
+ scanState = ScanState.CSI_ENTRY;
+ return;
+ }
+
+ // 0x9D goes to ScanState.OSC_STRING
+ if (ch == 0x9D) {
+ scanState = ScanState.OSC_STRING;
+ return;
+ }
+
+ // 0x90 goes to DCS_ENTRY
+ if (ch == 0x90) {
+ scanState = ScanState.DCS_ENTRY;
+ return;
+ }
+
+ // 0x98, 0x9E, and 0x9F go to SOSPMAPC_STRING
+ if ((ch == 0x98) || (ch == 0x9E) || (ch == 0x9F)) {
+ scanState = ScanState.SOSPMAPC_STRING;
+ return;
+ }
+
+ // 0x7F (DEL) is always discarded
+ if (ch == 0x7F) {
+ return;
+ }
+
+ switch (scanState) {
+
+ case GROUND:
+ // 00-17, 19, 1C-1F --> execute
+ // 80-8F, 91-9A, 9C --> execute
+ if ((ch <= 0x1F) || ((ch >= 0x80) && (ch <= 0x9F))) {
+ handleControlChar((char) ch);
+ }
+
+ // 20-7F --> print
+ if (((ch >= 0x20) && (ch <= 0x7F))
+ || (ch >= 0xA0)
+ ) {
+
+ // VT220 printer --> trash bin
+ if (((type == DeviceType.VT220)
+ || (type == DeviceType.XTERM))
+ && (printerControllerMode == true)
+ ) {
+ return;
+ }
+
+ // Hang onto this character
+ repCh = mapCharacter(ch);
+
+ // Print this character
+ printCharacter(repCh);
+ }
+ return;
+
+ case ESCAPE:
+ // 00-17, 19, 1C-1F --> execute
+ if (ch <= 0x1F) {
+ handleControlChar((char) ch);
+ return;
+ }
+
+ // 20-2F --> collect, then switch to ESCAPE_INTERMEDIATE
+ if ((ch >= 0x20) && (ch <= 0x2F)) {
+ collect((char) ch);
+ scanState = ScanState.ESCAPE_INTERMEDIATE;
+ return;
+ }
+
+ // 30-4F, 51-57, 59, 5A, 5C, 60-7E --> dispatch, then switch to GROUND
+ if ((ch >= 0x30) && (ch <= 0x4F)) {
+ switch (ch) {
+ case '0':
+ case '1':
+ case '2':
+ case '3':
+ case '4':
+ case '5':
+ case '6':
+ break;
+ case '7':
+ // DECSC - Save cursor
+ // Note this code overlaps both ANSI and VT52 mode
+ decsc();
+ break;
+
+ case '8':
+ // DECRC - Restore cursor
+ // Note this code overlaps both ANSI and VT52 mode
+ decrc();
+ break;
+
+ case '9':
+ case ':':
+ case ';':
+ break;
+ case '<':
+ if (vt52Mode == true) {
+ // DECANM - Enter ANSI mode
+ vt52Mode = false;
+ arrowKeyMode = ArrowKeyMode.VT100;
+
+ /*
+ * From the VT102 docs: "You use ANSI mode to select
+ * most terminal features; the terminal uses the same
+ * features when it switches to VT52 mode. You
+ * cannot, however, change most of these features in
+ * VT52 mode."
+ *
+ * In other words, do not reset any other attributes
+ * when switching between VT52 submode and ANSI.
+ */
+
+ // Reset fonts
+ currentState.g0Charset = CharacterSet.US;
+ currentState.g1Charset = CharacterSet.DRAWING;
+ s8c1t = false;
+ singleshift = Singleshift.NONE;
+ currentState.glLockshift = LockshiftMode.NONE;
+ currentState.grLockshift = LockshiftMode.NONE;
+ }
+ break;
+ case '=':
+ // DECKPAM - Keypad application mode
+ // Note this code overlaps both ANSI and VT52 mode
+ deckpam();
+ break;
+ case '>':
+ // DECKPNM - Keypad numeric mode
+ // Note this code overlaps both ANSI and VT52 mode
+ deckpnm();
+ break;
+ case '?':
+ case '@':
+ break;
+ case 'A':
+ if (vt52Mode == true) {
+ // Cursor up, and stop at the top without scrolling
+ cursorUp(1, false);
+ }
+ break;
+ case 'B':
+ if (vt52Mode == true) {
+ // Cursor down, and stop at the bottom without scrolling
+ cursorDown(1, false);
+ }
+ break;
+ case 'C':
+ if (vt52Mode == true) {
+ // Cursor right, and stop at the right without scrolling
+ cursorRight(1, false);
+ }
+ break;
+ case 'D':
+ if (vt52Mode == true) {
+ // Cursor left, and stop at the left without scrolling
+ cursorLeft(1, false);
+ } else {
+ // IND - Index
+ ind();
+ }
+ break;
+ case 'E':
+ if (vt52Mode == true) {
+ // Nothing
+ } else {
+ // NEL - Next line
+ nel();
+ }
+ break;
+ case 'F':
+ if (vt52Mode == true) {
+ // G0 --> Special graphics
+ currentState.g0Charset = CharacterSet.VT52_GRAPHICS;
+ }
+ break;
+ case 'G':
+ if (vt52Mode == true) {
+ // G0 --> ASCII set
+ currentState.g0Charset = CharacterSet.US;
+ }
+ break;
+ case 'H':
+ if (vt52Mode == true) {
+ // Cursor to home
+ cursorPosition(0, 0);
+ } else {
+ // HTS - Horizontal tabulation set
+ hts();
+ }
+ break;
+ case 'I':
+ if (vt52Mode == true) {
+ // Reverse line feed. Same as RI.
+ ri();
+ }
+ break;
+ case 'J':
+ if (vt52Mode == true) {
+ // Erase to end of screen
+ eraseLine(currentState.cursorX, width - 1, false);
+ eraseScreen(currentState.cursorY + 1, 0, height - 1,
+ width - 1, false);
+ }
+ break;
+ case 'K':
+ if (vt52Mode == true) {
+ // Erase to end of line
+ eraseLine(currentState.cursorX, width - 1, false);
+ }
+ break;
+ case 'L':
+ break;
+ case 'M':
+ if (vt52Mode == true) {
+ // Nothing
+ } else {
+ // RI - Reverse index
+ ri();
+ }
+ break;
+ case 'N':
+ if (vt52Mode == false) {
+ // SS2
+ singleshift = Singleshift.SS2;
+ }
+ break;
+ case 'O':
+ if (vt52Mode == false) {
+ // SS3
+ singleshift = Singleshift.SS3;
+ }
+ break;
+ }
+ toGround();
+ return;
+ }
+ if ((ch >= 0x51) && (ch <= 0x57)) {
+ switch (ch) {
+ case 'Q':
+ case 'R':
+ case 'S':
+ case 'T':
+ case 'U':
+ case 'V':
+ case 'W':
+ break;
+ }
+ toGround();
+ return;
+ }
+ if (ch == 0x59) {
+ // 'Y'
+ if (vt52Mode == true) {
+ scanState = ScanState.VT52_DIRECT_CURSOR_ADDRESS;
+ } else {
+ toGround();
+ }
+ return;
+ }
+ if (ch == 0x5A) {
+ // 'Z'
+ if (vt52Mode == true) {
+ // Identify
+ // Send string directly to remote side
+ writeRemote("\033/Z");
+ } else {
+ // DECID
+ // Send string directly to remote side
+ writeRemote(deviceTypeResponse());
+ }
+ toGround();
+ return;
+ }
+ if (ch == 0x5C) {
+ // '\'
+ toGround();
+ return;
+ }
+
+ // VT52 cannot get to any of these other states
+ if (vt52Mode == true) {
+ toGround();
+ return;
+ }
+
+ if ((ch >= 0x60) && (ch <= 0x7E)) {
+ switch (ch) {
+ case '`':
+ case 'a':
+ case 'b':
+ break;
+ case 'c':
+ // RIS - Reset to initial state
+ reset();
+ // Do I clear screen too? I think so...
+ eraseScreen(0, 0, height - 1, width - 1, false);
+ cursorPosition(0, 0);
+ break;
+ case 'd':
+ case 'e':
+ case 'f':
+ case 'g':
+ case 'h':
+ case 'i':
+ case 'j':
+ case 'k':
+ case 'l':
+ case 'm':
+ break;
+ case 'n':
+ if ((type == DeviceType.VT220)
+ || (type == DeviceType.XTERM)) {
+
+ // VT220 lockshift G2 into GL
+ currentState.glLockshift = LockshiftMode.G2_GL;
+ shiftOut = false;
+ }
+ break;
+ case 'o':
+ if ((type == DeviceType.VT220)
+ || (type == DeviceType.XTERM)) {
+
+ // VT220 lockshift G3 into GL
+ currentState.glLockshift = LockshiftMode.G3_GL;
+ shiftOut = false;
+ }
+ break;
+ case 'p':
+ case 'q':
+ case 'r':
+ case 's':
+ case 't':
+ case 'u':
+ case 'v':
+ case 'w':
+ case 'x':
+ case 'y':
+ case 'z':
+ case '{':
+ break;
+ case '|':
+ if ((type == DeviceType.VT220)
+ || (type == DeviceType.XTERM)) {
+
+ // VT220 lockshift G3 into GR
+ currentState.grLockshift = LockshiftMode.G3_GR;
+ shiftOut = false;
+ }
+ break;
+ case '}':
+ if ((type == DeviceType.VT220)
+ || (type == DeviceType.XTERM)) {
+
+ // VT220 lockshift G2 into GR
+ currentState.grLockshift = LockshiftMode.G2_GR;
+ shiftOut = false;
+ }
+ break;
+
+ case '~':
+ if ((type == DeviceType.VT220)
+ || (type == DeviceType.XTERM)) {
+
+ // VT220 lockshift G1 into GR
+ currentState.grLockshift = LockshiftMode.G1_GR;
+ shiftOut = false;
+ }
+ break;
+ }
+ toGround();
+ }
+
+ // 7F --> ignore
+
+ // 0x5B goes to CSI_ENTRY
+ if (ch == 0x5B) {
+ scanState = ScanState.CSI_ENTRY;
+ }
+
+ // 0x5D goes to OSC_STRING
+ if (ch == 0x5D) {
+ scanState = ScanState.OSC_STRING;
+ }
+
+ // 0x50 goes to DCS_ENTRY
+ if (ch == 0x50) {
+ scanState = ScanState.DCS_ENTRY;
+ }
+
+ // 0x58, 0x5E, and 0x5F go to SOSPMAPC_STRING
+ if ((ch == 0x58) || (ch == 0x5E) || (ch == 0x5F)) {
+ scanState = ScanState.SOSPMAPC_STRING;
+ }
+
+ return;
+
+ case ESCAPE_INTERMEDIATE:
+ // 00-17, 19, 1C-1F --> execute
+ if (ch <= 0x1F) {
+ handleControlChar((char) ch);
+ }
+
+ // 20-2F --> collect
+ if ((ch >= 0x20) && (ch <= 0x2F)) {
+ collect((char) ch);
+ }
+
+ // 30-7E --> dispatch, then switch to GROUND
+ if ((ch >= 0x30) && (ch <= 0x7E)) {
+ switch (ch) {
+ case '0':
+ if ((collectBuffer.length() == 1)
+ && (collectBuffer.charAt(0) == '(')) {
+ // G0 --> Special graphics
+ currentState.g0Charset = CharacterSet.DRAWING;
+ }
+ if ((collectBuffer.length() == 1)
+ && (collectBuffer.charAt(0) == ')')) {
+ // G1 --> Special graphics
+ currentState.g1Charset = CharacterSet.DRAWING;
+ }
+ if ((type == DeviceType.VT220)
+ || (type == DeviceType.XTERM)) {
+
+ if ((collectBuffer.length() == 1)
+ && (collectBuffer.charAt(0) == '*')) {
+ // G2 --> Special graphics
+ currentState.g2Charset = CharacterSet.DRAWING;
+ }
+ if ((collectBuffer.length() == 1)
+ && (collectBuffer.charAt(0) == '+')) {
+ // G3 --> Special graphics
+ currentState.g3Charset = CharacterSet.DRAWING;
+ }
+ }
+ break;
+ case '1':
+ if ((collectBuffer.length() == 1)
+ && (collectBuffer.charAt(0) == '(')) {
+ // G0 --> Alternate character ROM standard character set
+ currentState.g0Charset = CharacterSet.ROM;
+ }
+ if ((collectBuffer.length() == 1)
+ && (collectBuffer.charAt(0) == ')')) {
+ // G1 --> Alternate character ROM standard character set
+ currentState.g1Charset = CharacterSet.ROM;
+ }
+ break;
+ case '2':
+ if ((collectBuffer.length() == 1)
+ && (collectBuffer.charAt(0) == '(')) {
+ // G0 --> Alternate character ROM special graphics
+ currentState.g0Charset = CharacterSet.ROM_SPECIAL;
+ }
+ if ((collectBuffer.length() == 1)
+ && (collectBuffer.charAt(0) == ')')) {
+ // G1 --> Alternate character ROM special graphics
+ currentState.g1Charset = CharacterSet.ROM_SPECIAL;
+ }
+ break;
+ case '3':
+ if ((collectBuffer.length() == 1)
+ && (collectBuffer.charAt(0) == '#')) {
+ // DECDHL - Double-height line (top half)
+ dechdl(true);
+ }
+ break;
+ case '4':
+ if ((collectBuffer.length() == 1)
+ && (collectBuffer.charAt(0) == '#')) {
+ // DECDHL - Double-height line (bottom half)
+ dechdl(false);
+ }
+ if ((type == DeviceType.VT220)
+ || (type == DeviceType.XTERM)) {
+
+ if ((collectBuffer.length() == 1)
+ && (collectBuffer.charAt(0) == '(')) {
+ // G0 --> DUTCH
+ currentState.g0Charset = CharacterSet.NRC_DUTCH;
+ }
+ if ((collectBuffer.length() == 1)
+ && (collectBuffer.charAt(0) == ')')) {
+ // G1 --> DUTCH
+ currentState.g1Charset = CharacterSet.NRC_DUTCH;
+ }
+ if ((collectBuffer.length() == 1)
+ && (collectBuffer.charAt(0) == '*')) {
+ // G2 --> DUTCH
+ currentState.g2Charset = CharacterSet.NRC_DUTCH;
+ }
+ if ((collectBuffer.length() == 1)
+ && (collectBuffer.charAt(0) == '+')) {
+ // G3 --> DUTCH
+ currentState.g3Charset = CharacterSet.NRC_DUTCH;
+ }
+ }
+ break;
+ case '5':
+ if ((collectBuffer.length() == 1)
+ && (collectBuffer.charAt(0) == '#')) {
+ // DECSWL - Single-width line
+ decswl();
+ }
+ if ((type == DeviceType.VT220)
+ || (type == DeviceType.XTERM)) {
+
+ if ((collectBuffer.length() == 1)
+ && (collectBuffer.charAt(0) == '(')) {
+ // G0 --> FINNISH
+ currentState.g0Charset = CharacterSet.NRC_FINNISH;
+ }
+ if ((collectBuffer.length() == 1)
+ && (collectBuffer.charAt(0) == ')')) {
+ // G1 --> FINNISH
+ currentState.g1Charset = CharacterSet.NRC_FINNISH;
+ }
+ if ((collectBuffer.length() == 1)
+ && (collectBuffer.charAt(0) == '*')) {
+ // G2 --> FINNISH
+ currentState.g2Charset = CharacterSet.NRC_FINNISH;
+ }
+ if ((collectBuffer.length() == 1)
+ && (collectBuffer.charAt(0) == '+')) {
+ // G3 --> FINNISH
+ currentState.g3Charset = CharacterSet.NRC_FINNISH;
+ }
+ }
+ break;
+ case '6':
+ if ((collectBuffer.length() == 1)
+ && (collectBuffer.charAt(0) == '#')) {
+ // DECDWL - Double-width line
+ decdwl();
+ }
+ if ((type == DeviceType.VT220)
+ || (type == DeviceType.XTERM)) {
+
+ if ((collectBuffer.length() == 1)
+ && (collectBuffer.charAt(0) == '(')) {
+ // G0 --> NORWEGIAN
+ currentState.g0Charset = CharacterSet.NRC_NORWEGIAN;
+ }
+ if ((collectBuffer.length() == 1)
+ && (collectBuffer.charAt(0) == ')')) {
+ // G1 --> NORWEGIAN
+ currentState.g1Charset = CharacterSet.NRC_NORWEGIAN;
+ }
+ if ((collectBuffer.length() == 1)
+ && (collectBuffer.charAt(0) == '*')) {
+ // G2 --> NORWEGIAN
+ currentState.g2Charset = CharacterSet.NRC_NORWEGIAN;
+ }
+ if ((collectBuffer.length() == 1)
+ && (collectBuffer.charAt(0) == '+')) {
+ // G3 --> NORWEGIAN
+ currentState.g3Charset = CharacterSet.NRC_NORWEGIAN;
+ }
+ }
+ break;
+ case '7':
+ if ((type == DeviceType.VT220)
+ || (type == DeviceType.XTERM)) {
+
+ if ((collectBuffer.length() == 1)
+ && (collectBuffer.charAt(0) == '(')) {
+ // G0 --> SWEDISH
+ currentState.g0Charset = CharacterSet.NRC_SWEDISH;
+ }
+ if ((collectBuffer.length() == 1)
+ && (collectBuffer.charAt(0) == ')')) {
+ // G1 --> SWEDISH
+ currentState.g1Charset = CharacterSet.NRC_SWEDISH;
+ }
+ if ((collectBuffer.length() == 1)
+ && (collectBuffer.charAt(0) == '*')) {
+ // G2 --> SWEDISH
+ currentState.g2Charset = CharacterSet.NRC_SWEDISH;
+ }
+ if ((collectBuffer.length() == 1)
+ && (collectBuffer.charAt(0) == '+')) {
+ // G3 --> SWEDISH
+ currentState.g3Charset = CharacterSet.NRC_SWEDISH;
+ }
+ }
+ break;
+ case '8':
+ if ((collectBuffer.length() == 1)
+ && (collectBuffer.charAt(0) == '#')) {
+ // DECALN - Screen alignment display
+ decaln();
+ }
+ break;
+ case '9':
+ case ':':
+ case ';':
+ break;
+ case '<':
+ if ((type == DeviceType.VT220)
+ || (type == DeviceType.XTERM)) {
+
+ if ((collectBuffer.length() == 1)
+ && (collectBuffer.charAt(0) == '(')) {
+ // G0 --> DEC_SUPPLEMENTAL
+ currentState.g0Charset = CharacterSet.DEC_SUPPLEMENTAL;
+ }
+ if ((collectBuffer.length() == 1)
+ && (collectBuffer.charAt(0) == ')')) {
+ // G1 --> DEC_SUPPLEMENTAL
+ currentState.g1Charset = CharacterSet.DEC_SUPPLEMENTAL;
+ }
+ if ((collectBuffer.length() == 1)
+ && (collectBuffer.charAt(0) == '*')) {
+ // G2 --> DEC_SUPPLEMENTAL
+ currentState.g2Charset = CharacterSet.DEC_SUPPLEMENTAL;
+ }
+ if ((collectBuffer.length() == 1)
+ && (collectBuffer.charAt(0) == '+')) {
+ // G3 --> DEC_SUPPLEMENTAL
+ currentState.g3Charset = CharacterSet.DEC_SUPPLEMENTAL;
+ }
+ }
+ break;
+ case '=':
+ if ((type == DeviceType.VT220)
+ || (type == DeviceType.XTERM)) {
+
+ if ((collectBuffer.length() == 1)
+ && (collectBuffer.charAt(0) == '(')) {
+ // G0 --> SWISS
+ currentState.g0Charset = CharacterSet.NRC_SWISS;
+ }
+ if ((collectBuffer.length() == 1)
+ && (collectBuffer.charAt(0) == ')')) {
+ // G1 --> SWISS
+ currentState.g1Charset = CharacterSet.NRC_SWISS;
+ }
+ if ((collectBuffer.length() == 1)
+ && (collectBuffer.charAt(0) == '*')) {
+ // G2 --> SWISS
+ currentState.g2Charset = CharacterSet.NRC_SWISS;
+ }
+ if ((collectBuffer.length() == 1)
+ && (collectBuffer.charAt(0) == '+')) {
+ // G3 --> SWISS
+ currentState.g3Charset = CharacterSet.NRC_SWISS;
+ }
+ }
+ break;
+ case '>':
+ case '?':
+ case '@':
+ break;
+ case 'A':
+ if ((collectBuffer.length() == 1)
+ && (collectBuffer.charAt(0) == '(')) {
+ // G0 --> United Kingdom set
+ currentState.g0Charset = CharacterSet.UK;
+ }
+ if ((collectBuffer.length() == 1)
+ && (collectBuffer.charAt(0) == ')')) {
+ // G1 --> United Kingdom set
+ currentState.g1Charset = CharacterSet.UK;
+ }
+ if ((type == DeviceType.VT220)
+ || (type == DeviceType.XTERM)) {
+
+ if ((collectBuffer.length() == 1)
+ && (collectBuffer.charAt(0) == '*')) {
+ // G2 --> United Kingdom set
+ currentState.g2Charset = CharacterSet.UK;
+ }
+ if ((collectBuffer.length() == 1)
+ && (collectBuffer.charAt(0) == '+')) {
+ // G3 --> United Kingdom set
+ currentState.g3Charset = CharacterSet.UK;
+ }
+ }
+ break;
+ case 'B':
+ if ((collectBuffer.length() == 1)
+ && (collectBuffer.charAt(0) == '(')) {
+ // G0 --> ASCII set
+ currentState.g0Charset = CharacterSet.US;
+ }
+ if ((collectBuffer.length() == 1)
+ && (collectBuffer.charAt(0) == ')')) {
+ // G1 --> ASCII set
+ currentState.g1Charset = CharacterSet.US;
+ }
+ if ((type == DeviceType.VT220)
+ || (type == DeviceType.XTERM)) {
+
+ if ((collectBuffer.length() == 1)
+ && (collectBuffer.charAt(0) == '*')) {
+ // G2 --> ASCII
+ currentState.g2Charset = CharacterSet.US;
+ }
+ if ((collectBuffer.length() == 1)
+ && (collectBuffer.charAt(0) == '+')) {
+ // G3 --> ASCII
+ currentState.g3Charset = CharacterSet.US;
+ }
+ }
+ break;
+ case 'C':
+ if ((type == DeviceType.VT220)
+ || (type == DeviceType.XTERM)) {
+
+ if ((collectBuffer.length() == 1)
+ && (collectBuffer.charAt(0) == '(')) {
+ // G0 --> FINNISH
+ currentState.g0Charset = CharacterSet.NRC_FINNISH;
+ }
+ if ((collectBuffer.length() == 1)
+ && (collectBuffer.charAt(0) == ')')) {
+ // G1 --> FINNISH
+ currentState.g1Charset = CharacterSet.NRC_FINNISH;
+ }
+ if ((collectBuffer.length() == 1)
+ && (collectBuffer.charAt(0) == '*')) {
+ // G2 --> FINNISH
+ currentState.g2Charset = CharacterSet.NRC_FINNISH;
+ }
+ if ((collectBuffer.length() == 1)
+ && (collectBuffer.charAt(0) == '+')) {
+ // G3 --> FINNISH
+ currentState.g3Charset = CharacterSet.NRC_FINNISH;
+ }
+ }
+ break;
+ case 'D':
+ break;
+ case 'E':
+ if ((type == DeviceType.VT220)
+ || (type == DeviceType.XTERM)) {
+
+ if ((collectBuffer.length() == 1)
+ && (collectBuffer.charAt(0) == '(')) {
+ // G0 --> NORWEGIAN
+ currentState.g0Charset = CharacterSet.NRC_NORWEGIAN;
+ }
+ if ((collectBuffer.length() == 1)
+ && (collectBuffer.charAt(0) == ')')) {
+ // G1 --> NORWEGIAN
+ currentState.g1Charset = CharacterSet.NRC_NORWEGIAN;
+ }
+ if ((collectBuffer.length() == 1)
+ && (collectBuffer.charAt(0) == '*')) {
+ // G2 --> NORWEGIAN
+ currentState.g2Charset = CharacterSet.NRC_NORWEGIAN;
+ }
+ if ((collectBuffer.length() == 1)
+ && (collectBuffer.charAt(0) == '+')) {
+ // G3 --> NORWEGIAN
+ currentState.g3Charset = CharacterSet.NRC_NORWEGIAN;
+ }
+ }
+ break;
+ case 'F':
+ if ((type == DeviceType.VT220)
+ || (type == DeviceType.XTERM)) {
+
+ if ((collectBuffer.length() == 1)
+ && (collectBuffer.charAt(0) == ' ')) {
+ // S7C1T
+ s8c1t = false;
+ }
+ }
+ break;
+ case 'G':
+ if ((type == DeviceType.VT220)
+ || (type == DeviceType.XTERM)) {
+
+ if ((collectBuffer.length() == 1)
+ && (collectBuffer.charAt(0) == ' ')) {
+ // S8C1T
+ s8c1t = true;
+ }
+ }
+ break;
+ case 'H':
+ if ((type == DeviceType.VT220)
+ || (type == DeviceType.XTERM)) {
+
+ if ((collectBuffer.length() == 1)
+ && (collectBuffer.charAt(0) == '(')) {
+ // G0 --> SWEDISH
+ currentState.g0Charset = CharacterSet.NRC_SWEDISH;
+ }
+ if ((collectBuffer.length() == 1)
+ && (collectBuffer.charAt(0) == ')')) {
+ // G1 --> SWEDISH
+ currentState.g1Charset = CharacterSet.NRC_SWEDISH;
+ }
+ if ((collectBuffer.length() == 1)
+ && (collectBuffer.charAt(0) == '*')) {
+ // G2 --> SWEDISH
+ currentState.g2Charset = CharacterSet.NRC_SWEDISH;
+ }
+ if ((collectBuffer.length() == 1)
+ && (collectBuffer.charAt(0) == '+')) {
+ // G3 --> SWEDISH
+ currentState.g3Charset = CharacterSet.NRC_SWEDISH;
+ }
+ }
+ break;
+ case 'I':
+ case 'J':
+ break;
+ case 'K':
+ if ((type == DeviceType.VT220)
+ || (type == DeviceType.XTERM)) {
+
+ if ((collectBuffer.length() == 1)
+ && (collectBuffer.charAt(0) == '(')) {
+ // G0 --> GERMAN
+ currentState.g0Charset = CharacterSet.NRC_GERMAN;
+ }
+ if ((collectBuffer.length() == 1)
+ && (collectBuffer.charAt(0) == ')')) {
+ // G1 --> GERMAN
+ currentState.g1Charset = CharacterSet.NRC_GERMAN;
+ }
+ if ((collectBuffer.length() == 1)
+ && (collectBuffer.charAt(0) == '*')) {
+ // G2 --> GERMAN
+ currentState.g2Charset = CharacterSet.NRC_GERMAN;
+ }
+ if ((collectBuffer.length() == 1)
+ && (collectBuffer.charAt(0) == '+')) {
+ // G3 --> GERMAN
+ currentState.g3Charset = CharacterSet.NRC_GERMAN;
+ }
+ }
+ break;
+ case 'L':
+ case 'M':
+ case 'N':
+ case 'O':
+ case 'P':
+ break;
+ case 'Q':
+ if ((type == DeviceType.VT220)
+ || (type == DeviceType.XTERM)) {
+
+ if ((collectBuffer.length() == 1)
+ && (collectBuffer.charAt(0) == '(')) {
+ // G0 --> FRENCH_CA
+ currentState.g0Charset = CharacterSet.NRC_FRENCH_CA;
+ }
+ if ((collectBuffer.length() == 1)
+ && (collectBuffer.charAt(0) == ')')) {
+ // G1 --> FRENCH_CA
+ currentState.g1Charset = CharacterSet.NRC_FRENCH_CA;
+ }
+ if ((collectBuffer.length() == 1)
+ && (collectBuffer.charAt(0) == '*')) {
+ // G2 --> FRENCH_CA
+ currentState.g2Charset = CharacterSet.NRC_FRENCH_CA;
+ }
+ if ((collectBuffer.length() == 1)
+ && (collectBuffer.charAt(0) == '+')) {
+ // G3 --> FRENCH_CA
+ currentState.g3Charset = CharacterSet.NRC_FRENCH_CA;
+ }
+ }
+ break;
+ case 'R':
+ if ((type == DeviceType.VT220)
+ || (type == DeviceType.XTERM)) {
+
+ if ((collectBuffer.length() == 1)
+ && (collectBuffer.charAt(0) == '(')) {
+ // G0 --> FRENCH
+ currentState.g0Charset = CharacterSet.NRC_FRENCH;
+ }
+ if ((collectBuffer.length() == 1)
+ && (collectBuffer.charAt(0) == ')')) {
+ // G1 --> FRENCH
+ currentState.g1Charset = CharacterSet.NRC_FRENCH;
+ }
+ if ((collectBuffer.length() == 1)
+ && (collectBuffer.charAt(0) == '*')) {
+ // G2 --> FRENCH
+ currentState.g2Charset = CharacterSet.NRC_FRENCH;
+ }
+ if ((collectBuffer.length() == 1)
+ && (collectBuffer.charAt(0) == '+')) {
+ // G3 --> FRENCH
+ currentState.g3Charset = CharacterSet.NRC_FRENCH;
+ }
+ }
+ break;
+ case 'S':
+ case 'T':
+ case 'U':
+ case 'V':
+ case 'W':
+ case 'X':
+ break;
+ case 'Y':
+ if ((type == DeviceType.VT220)
+ || (type == DeviceType.XTERM)) {
+
+ if ((collectBuffer.length() == 1)
+ && (collectBuffer.charAt(0) == '(')) {
+ // G0 --> ITALIAN
+ currentState.g0Charset = CharacterSet.NRC_ITALIAN;
+ }
+ if ((collectBuffer.length() == 1)
+ && (collectBuffer.charAt(0) == ')')) {
+ // G1 --> ITALIAN
+ currentState.g1Charset = CharacterSet.NRC_ITALIAN;
+ }
+ if ((collectBuffer.length() == 1)
+ && (collectBuffer.charAt(0) == '*')) {
+ // G2 --> ITALIAN
+ currentState.g2Charset = CharacterSet.NRC_ITALIAN;
+ }
+ if ((collectBuffer.length() == 1)
+ && (collectBuffer.charAt(0) == '+')) {
+ // G3 --> ITALIAN
+ currentState.g3Charset = CharacterSet.NRC_ITALIAN;
+ }
+ }
+ break;
+ case 'Z':
+ if ((type == DeviceType.VT220)
+ || (type == DeviceType.XTERM)) {
+
+ if ((collectBuffer.length() == 1)
+ && (collectBuffer.charAt(0) == '(')) {
+ // G0 --> SPANISH
+ currentState.g0Charset = CharacterSet.NRC_SPANISH;
+ }
+ if ((collectBuffer.length() == 1)
+ && (collectBuffer.charAt(0) == ')')) {
+ // G1 --> SPANISH
+ currentState.g1Charset = CharacterSet.NRC_SPANISH;
+ }
+ if ((collectBuffer.length() == 1)
+ && (collectBuffer.charAt(0) == '*')) {
+ // G2 --> SPANISH
+ currentState.g2Charset = CharacterSet.NRC_SPANISH;
+ }
+ if ((collectBuffer.length() == 1)
+ && (collectBuffer.charAt(0) == '+')) {
+ // G3 --> SPANISH
+ currentState.g3Charset = CharacterSet.NRC_SPANISH;
+ }
+ }
+ break;
+ case '[':
+ case '\\':
+ case ']':
+ case '^':
+ case '_':
+ case '`':
+ case 'a':
+ case 'b':
+ case 'c':
+ case 'd':
+ case 'e':
+ case 'f':
+ case 'g':
+ case 'h':
+ case 'i':
+ case 'j':
+ case 'k':
+ case 'l':
+ case 'm':
+ case 'n':
+ case 'o':
+ case 'p':
+ case 'q':
+ case 'r':
+ case 's':
+ case 't':
+ case 'u':
+ case 'v':
+ case 'w':
+ case 'x':
+ case 'y':
+ case 'z':
+ case '{':
+ case '|':
+ case '}':
+ case '~':
+ break;
+ }
+ toGround();
+ }
+
+ // 7F --> ignore
+
+ // 0x9C goes to GROUND
+ if (ch == 0x9C) {
+ toGround();
+ }
+
+ return;
+
+ case CSI_ENTRY:
+ // 00-17, 19, 1C-1F --> execute
+ if (ch <= 0x1F) {
+ handleControlChar((char) ch);
+ }
+
+ // 20-2F --> collect, then switch to CSI_INTERMEDIATE
+ if ((ch >= 0x20) && (ch <= 0x2F)) {
+ collect((char) ch);
+ scanState = ScanState.CSI_INTERMEDIATE;
+ }
+
+ // 30-39, 3B --> param, then switch to CSI_PARAM
+ if ((ch >= '0') && (ch <= '9')) {
+ param((byte) ch);
+ scanState = ScanState.CSI_PARAM;
+ }
+ if (ch == ';') {
+ param((byte) ch);
+ scanState = ScanState.CSI_PARAM;
+ }
+
+ // 3C-3F --> collect, then switch to CSI_PARAM
+ if ((ch >= 0x3C) && (ch <= 0x3F)) {
+ collect((char) ch);
+ scanState = ScanState.CSI_PARAM;
+ }
+
+ // 40-7E --> dispatch, then switch to GROUND
+ if ((ch >= 0x40) && (ch <= 0x7E)) {
+ switch (ch) {
+ case '@':
+ // ICH - Insert character
+ ich();
+ break;
+ case 'A':
+ // CUU - Cursor up
+ cuu();
+ break;
+ case 'B':
+ // CUD - Cursor down
+ cud();
+ break;
+ case 'C':
+ // CUF - Cursor forward
+ cuf();
+ break;
+ case 'D':
+ // CUB - Cursor backward
+ cub();
+ break;
+ case 'E':
+ // CNL - Cursor down and to column 1
+ if (type == DeviceType.XTERM) {
+ cnl();
+ }
+ break;
+ case 'F':
+ // CPL - Cursor up and to column 1
+ if (type == DeviceType.XTERM) {
+ cpl();
+ }
+ break;
+ case 'G':
+ // CHA - Cursor to column # in current row
+ if (type == DeviceType.XTERM) {
+ cha();
+ }
+ break;
+ case 'H':
+ // CUP - Cursor position
+ cup();
+ break;
+ case 'I':
+ // CHT - Cursor forward X tab stops (default 1)
+ if (type == DeviceType.XTERM) {
+ cht();
+ }
+ break;
+ case 'J':
+ // ED - Erase in display
+ ed();
+ break;
+ case 'K':
+ // EL - Erase in line
+ el();
+ break;
+ case 'L':
+ // IL - Insert line
+ il();
+ break;
+ case 'M':
+ // DL - Delete line
+ dl();
+ break;
+ case 'N':
+ case 'O':
+ break;
+ case 'P':
+ // DCH - Delete character
+ dch();
+ break;
+ case 'Q':
+ case 'R':
+ break;
+ case 'S':
+ // Scroll up X lines (default 1)
+ if (type == DeviceType.XTERM) {
+ boolean xtermPrivateModeFlag = false;
+ for (int i = 0; i < collectBuffer.length(); i++) {
+ if (collectBuffer.charAt(i) == '?') {
+ xtermPrivateModeFlag = true;
+ break;
+ }
+ }
+ if (xtermPrivateModeFlag) {
+ xtermSixelQuery();
+ } else {
+ su();
+ }
+ }
+ break;
+ case 'T':
+ // Scroll down X lines (default 1)
+ if (type == DeviceType.XTERM) {
+ sd();
+ }
+ break;
+ case 'U':
+ case 'V':
+ case 'W':
+ break;
+ case 'X':
+ if ((type == DeviceType.VT220)
+ || (type == DeviceType.XTERM)) {
+
+ // ECH - Erase character
+ ech();
+ }
+ break;
+ case 'Y':
+ break;
+ case 'Z':
+ // CBT - Cursor backward X tab stops (default 1)
+ if (type == DeviceType.XTERM) {
+ cbt();
+ }
+ break;
+ case '[':
+ case '\\':
+ case ']':
+ case '^':
+ case '_':
+ break;
+ case '`':
+ // HPA - Cursor to column # in current row. Same as CHA
+ if (type == DeviceType.XTERM) {
+ cha();
+ }
+ break;
+ case 'a':
+ // HPR - Cursor right. Same as CUF
+ if (type == DeviceType.XTERM) {
+ cuf();
+ }
+ break;
+ case 'b':
+ // REP - Repeat last char X times
+ if (type == DeviceType.XTERM) {
+ rep();
+ }
+ break;
+ case 'c':
+ // DA - Device attributes
+ da();
+ break;
+ case 'd':
+ // VPA - Cursor to row, current column.
+ if (type == DeviceType.XTERM) {
+ vpa();
+ }
+ break;
+ case 'e':
+ // VPR - Cursor down. Same as CUD
+ if (type == DeviceType.XTERM) {
+ cud();
+ }
+ break;
+ case 'f':
+ // HVP - Horizontal and vertical position
+ hvp();
+ break;
+ case 'g':
+ // TBC - Tabulation clear
+ tbc();
+ break;
+ case 'h':
+ // Sets an ANSI or DEC private toggle
+ setToggle(true);
+ break;
+ case 'i':
+ if ((type == DeviceType.VT220)
+ || (type == DeviceType.XTERM)) {
+
+ // Printer functions
+ printerFunctions();
+ }
+ break;
+ case 'j':
+ case 'k':
+ break;
+ case 'l':
+ // Sets an ANSI or DEC private toggle
+ setToggle(false);
+ break;
+ case 'm':
+ // SGR - Select graphics rendition
+ sgr();
+ break;
+ case 'n':
+ // DSR - Device status report
+ dsr();
+ break;
+ case 'o':
+ case 'p':
+ break;
+ case 'q':
+ // DECLL - Load leds
+ // Not supported
+ break;
+ case 'r':
+ // DECSTBM - Set top and bottom margins
+ decstbm();
+ break;
+ case 's':
+ // Save cursor (ANSI.SYS)
+ if (type == DeviceType.XTERM) {
+ savedState.cursorX = currentState.cursorX;
+ savedState.cursorY = currentState.cursorY;
+ }
+ break;
+ case 't':
+ if (type == DeviceType.XTERM) {
+ // Window operations
+ xtermWindowOps();
+ }
+ break;
+ case 'u':
+ // Restore cursor (ANSI.SYS)
+ if (type == DeviceType.XTERM) {
+ cursorPosition(savedState.cursorY, savedState.cursorX);
+ }
+ break;
+ case 'v':
+ case 'w':
+ break;
+ case 'x':
+ // DECREQTPARM - Request terminal parameters
+ decreqtparm();
+ break;
+ case 'y':
+ case 'z':
+ case '{':
+ case '|':
+ case '}':
+ case '~':
+ break;
+ }
+ toGround();
+ }
+
+ // 7F --> ignore
+
+ // 0x9C goes to GROUND
+ if (ch == 0x9C) {
+ toGround();
+ }
+
+ // 0x3A goes to CSI_IGNORE
+ if (ch == 0x3A) {
+ scanState = ScanState.CSI_IGNORE;
+ }
+ return;
+
+ case CSI_PARAM:
+ // 00-17, 19, 1C-1F --> execute
+ if (ch <= 0x1F) {
+ handleControlChar((char) ch);
+ }
+
+ // 20-2F --> collect, then switch to CSI_INTERMEDIATE
+ if ((ch >= 0x20) && (ch <= 0x2F)) {
+ collect((char) ch);
+ scanState = ScanState.CSI_INTERMEDIATE;
+ }
+
+ // 30-39, 3B --> param
+ if ((ch >= '0') && (ch <= '9')) {
+ param((byte) ch);
+ }
+ if (ch == ';') {
+ param((byte) ch);
+ }
+
+ // 0x3A goes to CSI_IGNORE
+ if (ch == 0x3A) {
+ scanState = ScanState.CSI_IGNORE;
+ }
+ // 0x3C-3F goes to CSI_IGNORE
+ if ((ch >= 0x3C) && (ch <= 0x3F)) {
+ scanState = ScanState.CSI_IGNORE;
+ }
+
+ // 40-7E --> dispatch, then switch to GROUND
+ if ((ch >= 0x40) && (ch <= 0x7E)) {
+ switch (ch) {
+ case '@':
+ // ICH - Insert character
+ ich();
+ break;
+ case 'A':
+ // CUU - Cursor up
+ cuu();
+ break;
+ case 'B':
+ // CUD - Cursor down
+ cud();
+ break;
+ case 'C':
+ // CUF - Cursor forward
+ cuf();
+ break;
+ case 'D':
+ // CUB - Cursor backward
+ cub();
+ break;
+ case 'E':
+ // CNL - Cursor down and to column 1
+ if (type == DeviceType.XTERM) {
+ cnl();
+ }
+ break;
+ case 'F':
+ // CPL - Cursor up and to column 1
+ if (type == DeviceType.XTERM) {
+ cpl();
+ }
+ break;
+ case 'G':
+ // CHA - Cursor to column # in current row
+ if (type == DeviceType.XTERM) {
+ cha();
+ }
+ break;
+ case 'H':
+ // CUP - Cursor position
+ cup();
+ break;
+ case 'I':
+ // CHT - Cursor forward X tab stops (default 1)
+ if (type == DeviceType.XTERM) {
+ cht();
+ }
+ break;
+ case 'J':
+ // ED - Erase in display
+ ed();
+ break;
+ case 'K':
+ // EL - Erase in line
+ el();
+ break;
+ case 'L':
+ // IL - Insert line
+ il();
+ break;
+ case 'M':
+ // DL - Delete line
+ dl();
+ break;
+ case 'N':
+ case 'O':
+ break;
+ case 'P':
+ // DCH - Delete character
+ dch();
+ break;
+ case 'Q':
+ case 'R':
+ break;
+ case 'S':
+ // Scroll up X lines (default 1)
+ if (type == DeviceType.XTERM) {
+ boolean xtermPrivateModeFlag = false;
+ for (int i = 0; i < collectBuffer.length(); i++) {
+ if (collectBuffer.charAt(i) == '?') {
+ xtermPrivateModeFlag = true;
+ break;
+ }
+ }
+ if (xtermPrivateModeFlag) {
+ xtermSixelQuery();
+ } else {
+ su();
+ }
+ }
+ break;
+ case 'T':
+ // Scroll down X lines (default 1)
+ if (type == DeviceType.XTERM) {
+ sd();
+ }
+ break;
+ case 'U':
+ case 'V':
+ case 'W':
+ break;
+ case 'X':
+ if ((type == DeviceType.VT220)
+ || (type == DeviceType.XTERM)) {
+
+ // ECH - Erase character
+ ech();
+ }
+ break;
+ case 'Y':
+ break;
+ case 'Z':
+ // CBT - Cursor backward X tab stops (default 1)
+ if (type == DeviceType.XTERM) {
+ cbt();
+ }
+ break;
+ case '[':
+ case '\\':
+ case ']':
+ case '^':
+ case '_':
+ break;
+ case '`':
+ // HPA - Cursor to column # in current row. Same as CHA
+ if (type == DeviceType.XTERM) {
+ cha();
+ }
+ break;
+ case 'a':
+ // HPR - Cursor right. Same as CUF
+ if (type == DeviceType.XTERM) {
+ cuf();
+ }
+ break;
+ case 'b':
+ // REP - Repeat last char X times
+ if (type == DeviceType.XTERM) {
+ rep();
+ }
+ break;
+ case 'c':
+ // DA - Device attributes
+ da();
+ break;
+ case 'd':
+ // VPA - Cursor to row, current column.
+ if (type == DeviceType.XTERM) {
+ vpa();
+ }
+ break;
+ case 'e':
+ // VPR - Cursor down. Same as CUD
+ if (type == DeviceType.XTERM) {
+ cud();
+ }
+ break;
+ case 'f':
+ // HVP - Horizontal and vertical position
+ hvp();
+ break;
+ case 'g':
+ // TBC - Tabulation clear
+ tbc();
+ break;
+ case 'h':
+ // Sets an ANSI or DEC private toggle
+ setToggle(true);
+ break;
+ case 'i':
+ if ((type == DeviceType.VT220)
+ || (type == DeviceType.XTERM)) {
+
+ // Printer functions
+ printerFunctions();
+ }
+ break;
+ case 'j':
+ case 'k':
+ break;
+ case 'l':
+ // Sets an ANSI or DEC private toggle
+ setToggle(false);
+ break;
+ case 'm':
+ // SGR - Select graphics rendition
+ sgr();
+ break;
+ case 'n':
+ // DSR - Device status report
+ dsr();
+ break;
+ case 'o':
+ case 'p':
+ break;
+ case 'q':
+ // DECLL - Load leds
+ // Not supported
+ break;
+ case 'r':
+ // DECSTBM - Set top and bottom margins
+ decstbm();
+ break;
+ case 's':
+ break;
+ case 't':
+ if (type == DeviceType.XTERM) {
+ // Window operations
+ xtermWindowOps();
+ }
+ break;
+ case 'u':
+ case 'v':
+ case 'w':
+ break;
+ case 'x':
+ // DECREQTPARM - Request terminal parameters
+ decreqtparm();
+ break;
+ case 'y':
+ case 'z':
+ case '{':
+ case '|':
+ case '}':
+ case '~':
+ break;
+ }
+ toGround();
+ }
+
+ // 7F --> ignore
+ return;
+
+ case CSI_INTERMEDIATE:
+ // 00-17, 19, 1C-1F --> execute
+ if (ch <= 0x1F) {
+ handleControlChar((char) ch);
+ }
+
+ // 20-2F --> collect
+ if ((ch >= 0x20) && (ch <= 0x2F)) {
+ collect((char) ch);
+ }
+
+ // 0x30-3F goes to CSI_IGNORE
+ if ((ch >= 0x30) && (ch <= 0x3F)) {
+ scanState = ScanState.CSI_IGNORE;
+ }
+
+ // 40-7E --> dispatch, then switch to GROUND
+ if ((ch >= 0x40) && (ch <= 0x7E)) {
+ switch (ch) {
+ case '@':
+ case 'A':
+ case 'B':
+ case 'C':
+ case 'D':
+ case 'E':
+ case 'F':
+ case 'G':
+ case 'H':
+ case 'I':
+ case 'J':
+ case 'K':
+ case 'L':
+ case 'M':
+ case 'N':
+ case 'O':
+ case 'P':
+ case 'Q':
+ case 'R':
+ case 'S':
+ case 'T':
+ case 'U':
+ case 'V':
+ case 'W':
+ case 'X':
+ case 'Y':
+ case 'Z':
+ case '[':
+ case '\\':
+ case ']':
+ case '^':
+ case '_':
+ case '`':
+ case 'a':
+ case 'b':
+ case 'c':
+ case 'd':
+ case 'e':
+ case 'f':
+ case 'g':
+ case 'h':
+ case 'i':
+ case 'j':
+ case 'k':
+ case 'l':
+ case 'm':
+ case 'n':
+ case 'o':
+ break;
+ case 'p':
+ if (((type == DeviceType.VT220)
+ || (type == DeviceType.XTERM))
+ && (collectBuffer.charAt(collectBuffer.length() - 1) == '\"')
+ ) {
+ // DECSCL - compatibility level
+ decscl();
+ }
+ if ((type == DeviceType.XTERM)
+ && (collectBuffer.charAt(collectBuffer.length() - 1) == '!')
+ ) {
+ // DECSTR - Soft terminal reset
+ decstr();
+ }
+ break;
+ case 'q':
+ if (((type == DeviceType.VT220)
+ || (type == DeviceType.XTERM))
+ && (collectBuffer.charAt(collectBuffer.length() - 1) == '\"')
+ ) {
+ // DECSCA
+ decsca();
+ }
+ break;
+ case 'r':
+ case 's':
+ case 't':
+ case 'u':
+ case 'v':
+ case 'w':
+ case 'x':
+ case 'y':
+ case 'z':
+ case '{':
+ case '|':
+ case '}':
+ case '~':
+ break;
+ }
+ toGround();
+ }
+
+ // 7F --> ignore
+ return;
+
+ case CSI_IGNORE:
+ // 00-17, 19, 1C-1F --> execute
+ if (ch <= 0x1F) {
+ handleControlChar((char) ch);
+ }
+
+ // 20-2F --> collect
+ if ((ch >= 0x20) && (ch <= 0x2F)) {
+ collect((char) ch);
+ }
+
+ // 40-7E --> ignore, then switch to GROUND
+ if ((ch >= 0x40) && (ch <= 0x7E)) {
+ toGround();
+ }
+
+ // 20-3F, 7F --> ignore
+
+ return;
+
+ case DCS_ENTRY:
+
+ // 0x9C goes to GROUND
+ if (ch == 0x9C) {
+ toGround();
+ }
+
+ // 0x1B 0x5C goes to GROUND
+ if (ch == 0x1B) {
+ collect((char) ch);
+ }
+ if (ch == 0x5C) {
+ if ((collectBuffer.length() > 0)
+ && (collectBuffer.charAt(collectBuffer.length() - 1) == 0x1B)
+ ) {
+ toGround();
+ }
+ }
+
+ // 20-2F --> collect, then switch to DCS_INTERMEDIATE
+ if ((ch >= 0x20) && (ch <= 0x2F)) {
+ collect((char) ch);
+ scanState = ScanState.DCS_INTERMEDIATE;
+ }
+
+ // 30-39, 3B --> param, then switch to DCS_PARAM
+ if ((ch >= '0') && (ch <= '9')) {
+ param((byte) ch);
+ scanState = ScanState.DCS_PARAM;
+ }
+ if (ch == ';') {
+ param((byte) ch);
+ scanState = ScanState.DCS_PARAM;
+ }
+
+ // 3C-3F --> collect, then switch to DCS_PARAM
+ if ((ch >= 0x3C) && (ch <= 0x3F)) {
+ collect((char) ch);
+ scanState = ScanState.DCS_PARAM;
+ }
+
+ // 00-17, 19, 1C-1F, 7F --> ignore
+
+ // 0x3A goes to DCS_IGNORE
+ if (ch == 0x3F) {
+ scanState = ScanState.DCS_IGNORE;
+ }
+
+ // 0x71 goes to DCS_SIXEL
+ if (ch == 0x71) {
+ sixelParseBuffer = new StringBuilder();
+ scanState = ScanState.DCS_SIXEL;
+ } else if ((ch >= 0x40) && (ch <= 0x7E)) {
+ // 0x40-7E goes to DCS_PASSTHROUGH
+ scanState = ScanState.DCS_PASSTHROUGH;
+ }
+ return;
+
+ case DCS_INTERMEDIATE:
+
+ // 0x9C goes to GROUND
+ if (ch == 0x9C) {
+ toGround();
+ }
+
+ // 0x1B 0x5C goes to GROUND
+ if (ch == 0x1B) {
+ collect((char) ch);
+ }
+ if (ch == 0x5C) {
+ if ((collectBuffer.length() > 0)
+ && (collectBuffer.charAt(collectBuffer.length() - 1) == 0x1B)
+ ) {
+ toGround();
+ }
+ }
+
+ // 0x30-3F goes to DCS_IGNORE
+ if ((ch >= 0x30) && (ch <= 0x3F)) {
+ scanState = ScanState.DCS_IGNORE;
+ }
+
+ // 0x40-7E goes to DCS_PASSTHROUGH
+ if ((ch >= 0x40) && (ch <= 0x7E)) {
+ scanState = ScanState.DCS_PASSTHROUGH;
+ }
+
+ // 00-17, 19, 1C-1F, 7F --> ignore
+ return;
+
+ case DCS_PARAM:
+
+ // 0x9C goes to GROUND
+ if (ch == 0x9C) {
+ toGround();
+ }
+
+ // 0x1B 0x5C goes to GROUND
+ if (ch == 0x1B) {
+ collect((char) ch);
+ }
+ if (ch == 0x5C) {
+ if ((collectBuffer.length() > 0)
+ && (collectBuffer.charAt(collectBuffer.length() - 1) == 0x1B)
+ ) {
+ toGround();
+ }
+ }
+
+ // 20-2F --> collect, then switch to DCS_INTERMEDIATE
+ if ((ch >= 0x20) && (ch <= 0x2F)) {
+ collect((char) ch);
+ scanState = ScanState.DCS_INTERMEDIATE;
+ }
+
+ // 30-39, 3B --> param
+ if ((ch >= '0') && (ch <= '9')) {
+ param((byte) ch);
+ }
+ if (ch == ';') {
+ param((byte) ch);
+ }
+
+ // 00-17, 19, 1C-1F, 7F --> ignore
+
+ // 0x3A, 3C-3F goes to DCS_IGNORE
+ if (ch == 0x3F) {
+ scanState = ScanState.DCS_IGNORE;
+ }
+ if ((ch >= 0x3C) && (ch <= 0x3F)) {
+ scanState = ScanState.DCS_IGNORE;
+ }
+
+ // 0x71 goes to DCS_SIXEL
+ if (ch == 0x71) {
+ sixelParseBuffer = new StringBuilder();
+ scanState = ScanState.DCS_SIXEL;
+ } else if ((ch >= 0x40) && (ch <= 0x7E)) {
+ // 0x40-7E goes to DCS_PASSTHROUGH
+ scanState = ScanState.DCS_PASSTHROUGH;
+ }
+ return;
+
+ case DCS_PASSTHROUGH:
+ // 0x9C goes to GROUND
+ if (ch == 0x9C) {
+ toGround();
+ }
+
+ // 0x1B 0x5C goes to GROUND
+ if (ch == 0x1B) {
+ collect((char) ch);
+ }
+ if (ch == 0x5C) {
+ if ((collectBuffer.length() > 0)
+ && (collectBuffer.charAt(collectBuffer.length() - 1) == 0x1B)
+ ) {
+ toGround();
+ }
+ }
+
+ // 00-17, 19, 1C-1F, 20-7E --> put
+ if (ch <= 0x17) {
+ // We ignore all DCS except sixel.
+ return;
+ }
+ if (ch == 0x19) {
+ // We ignore all DCS except sixel.
+ return;
+ }
+ if ((ch >= 0x1C) && (ch <= 0x1F)) {
+ // We ignore all DCS except sixel.
+ return;
+ }
+ if ((ch >= 0x20) && (ch <= 0x7E)) {
+ // We ignore all DCS except sixel.
+ return;
+ }
+
+ // 7F --> ignore
+
+ return;
+
+ case DCS_IGNORE:
+ // 00-17, 19, 1C-1F, 20-7F --> ignore
+
+ // 0x9C goes to GROUND
+ if (ch == 0x9C) {
+ toGround();
+ }
+
+ return;
+
+ case DCS_SIXEL:
+ // 0x9C goes to GROUND
+ if (ch == 0x9C) {
+ parseSixel();
+ toGround();
+ return;
+ }
+
+ // 0x1B 0x5C goes to GROUND
+ if (ch == 0x1B) {
+ collect((char) ch);
+ return;
+ }
+ if (ch == 0x5C) {
+ if ((collectBuffer.length() > 0)
+ && (collectBuffer.charAt(collectBuffer.length() - 1) == 0x1B)
+ ) {
+ parseSixel();
+ toGround();
+ return;
+ }
+ }
+
+ // 00-17, 19, 1C-1F, 20-7E --> put
+ if ((ch <= 0x17)
+ || (ch == 0x19)
+ || ((ch >= 0x1C) && (ch <= 0x1F))
+ || ((ch >= 0x20) && (ch <= 0x7E))
+ ) {
+ sixelParseBuffer.append((char) ch);
+ }
+
+ // 7F --> ignore
+ return;
+
+ case SOSPMAPC_STRING:
+ // 00-17, 19, 1C-1F, 20-7F --> ignore
+
+ // Special case for Jexer: PM can pass one control character
+ if (ch == 0x1B) {
+ pmPut((char) ch);
+ }
+
+ if ((ch >= 0x20) && (ch <= 0x7F)) {
+ pmPut((char) ch);
+ }
+
+ // 0x9C goes to GROUND
+ if (ch == 0x9C) {
+ toGround();
+ }
+
+ return;
+
+ case OSC_STRING:
+ // Special case for Xterm: OSC can pass control characters
+ if ((ch == 0x9C) || (ch == 0x07) || (ch == 0x1B)) {
+ oscPut((char) ch);
+ }
+
+ // 00-17, 19, 1C-1F --> ignore
+
+ // 20-7F --> osc_put
+ if ((ch >= 0x20) && (ch <= 0x7F)) {
+ oscPut((char) ch);
+ }
+
+ // 0x9C goes to GROUND
+ if (ch == 0x9C) {
+ toGround();
+ }
+
+ return;
+
+ case VT52_DIRECT_CURSOR_ADDRESS:
+ // This is a special case for the VT52 sequence "ESC Y l c"
+ if (collectBuffer.length() == 0) {
+ collect((char) ch);
+ } else if (collectBuffer.length() == 1) {
+ // We've got the two characters, one in the buffer and the
+ // other in ch.
+ cursorPosition(collectBuffer.charAt(0) - '\040', ch - '\040');
+ toGround();
+ }
+ return;
+ }
+
+ }
+
+ /**
+ * Expose current cursor X to outside world.
+ *
+ * @return current cursor X
+ */
+ public final int getCursorX() {
+ if (display.get(currentState.cursorY).isDoubleWidth()) {
+ return currentState.cursorX * 2;
+ }
+ return currentState.cursorX;
+ }
+
+ /**
+ * Expose current cursor Y to outside world.
+ *
+ * @return current cursor Y
+ */
+ public final int getCursorY() {
+ return currentState.cursorY;
+ }
+
+ /**
+ * Returns true if this terminal has requested the mouse pointer be
+ * hidden.
+ *
+ * @return true if this terminal has requested the mouse pointer be
+ * hidden
+ */
+ public final boolean hasHiddenMousePointer() {
+ return hideMousePointer;
+ }
+
+ /**
+ * Get the mouse protocol.
+ *
+ * @return MouseProtocol.OFF, MouseProtocol.X10, etc.
+ */
+ public MouseProtocol getMouseProtocol() {
+ return mouseProtocol;
+ }
+
+ /**
+ * Draw the left and right cells of a two-cell-wide (full-width) glyph.
+ *
+ * @param leftX the x position to draw the left half to
+ * @param leftY the y position to draw the left half to
+ * @param rightX the x position to draw the right half to
+ * @param rightY the y position to draw the right half to
+ * @param ch the character to draw
+ */
+ private void drawHalves(final int leftX, final int leftY,
+ final int rightX, final int rightY, final int ch) {
+
+ // System.err.println("drawHalves(): " + Integer.toHexString(ch));
+
+ if (lastTextHeight != textHeight) {
+ glyphMaker = GlyphMaker.getInstance(textHeight);
+ lastTextHeight = textHeight;
+ }
+
+ Cell cell = new Cell(ch, currentState.attr);
+ BufferedImage image = glyphMaker.getImage(cell, textWidth * 2,
+ textHeight);
+ BufferedImage leftImage = image.getSubimage(0, 0, textWidth,
+ textHeight);
+ BufferedImage rightImage = image.getSubimage(textWidth, 0, textWidth,
+ textHeight);
+
+ Cell left = new Cell(cell);
+ left.setImage(leftImage);
+ left.setWidth(Cell.Width.LEFT);
+ display.get(leftY).replace(leftX, left);
+
+ Cell right = new Cell(cell);
+ right.setImage(rightImage);
+ right.setWidth(Cell.Width.RIGHT);
+ display.get(rightY).replace(rightX, right);
+ }
+
+ /**
+ * Set the width of a character cell in pixels.
+ *
+ * @param textWidth the width in pixels of a character cell
+ */
+ public void setTextWidth(final int textWidth) {
+ this.textWidth = textWidth;
+ }
+
+ /**
+ * Set the height of a character cell in pixels.
+ *
+ * @param textHeight the height in pixels of a character cell
+ */
+ public void setTextHeight(final int textHeight) {
+ this.textHeight = textHeight;
+ }
+
+ /**
+ * Parse a sixel string into a bitmap image, and overlay that image onto
+ * the text cells.
+ */
+ private void parseSixel() {
+
+ /*
+ System.err.println("parseSixel(): '" + sixelParseBuffer.toString()
+ + "'");
+ */
+
+ Sixel sixel = new Sixel(sixelParseBuffer.toString(), sixelPalette);
+ BufferedImage image = sixel.getImage();
+
+ // System.err.println("parseSixel(): image " + image);
+
+ if (image == null) {
+ // Sixel data was malformed in some way, bail out.
+ return;
+ }
+
+ /*
+ * Procedure:
+ *
+ * Break up the image into text cell sized pieces as a new array of
+ * Cells.
+ *
+ * Note original column position x0.
+ *
+ * For each cell:
+ *
+ * 1. Advance (printCharacter(' ')) for horizontal increment, or
+ * index (linefeed() + cursorPosition(y, x0)) for vertical
+ * increment.
+ *
+ * 2. Set (x, y) cell image data.
+ *
+ * 3. For the right and bottom edges:
+ *
+ * a. Render the text to pixels using Terminus font.
+ *
+ * b. Blit the image on top of the text, using alpha channel.
+ */
+ int cellColumns = image.getWidth() / textWidth;
+ if (cellColumns * textWidth < image.getWidth()) {
+ cellColumns++;
+ }
+ int cellRows = image.getHeight() / textHeight;
+ if (cellRows * textHeight < image.getHeight()) {
+ cellRows++;
+ }
+
+ // Break the image up into an array of cells.
+ Cell [][] cells = new Cell[cellColumns][cellRows];
+
+ for (int x = 0; x < cellColumns; x++) {
+ for (int y = 0; y < cellRows; y++) {
+
+ int width = textWidth;
+ if ((x + 1) * textWidth > image.getWidth()) {
+ width = image.getWidth() - (x * textWidth);
+ }
+ int height = textHeight;
+ if ((y + 1) * textHeight > image.getHeight()) {
+ height = image.getHeight() - (y * textHeight);
+ }
+
+ Cell cell = new Cell();
+ cell.setImage(image.getSubimage(x * textWidth,
+ y * textHeight, width, height));
+
+ cells[x][y] = cell;
+ }
+ }
+
+ int x0 = currentState.cursorX;
+ for (int y = 0; y < cellRows; y++) {
+ for (int x = 0; x < cellColumns; x++) {
+ assert (currentState.cursorX <= rightMargin);
+
+ // TODO: Render text of current cell first, then image over
+ // it (accounting for blank pixels). For now, just copy the
+ // cell.
+ DisplayLine line = display.get(currentState.cursorY);
+ line.replace(currentState.cursorX, cells[x][y]);
+
+ // If at the end of the visible screen, stop.
+ if (currentState.cursorX == rightMargin) {
+ break;
+ }
+ // Room for more image on the visible screen.
+ currentState.cursorX++;
+ }
+ linefeed();
+ cursorPosition(currentState.cursorY, x0);
+ }
+
+ }
+
+ /**
+ * Parse a "Jexer" image string into a bitmap image, and overlay that
+ * image onto the text cells.
+ *
+ * @param pw width token
+ * @param ph height token
+ * @param ps scroll token
+ * @param data pixel data
+ */
+ private void parseJexerImage(final String pw, final String ph,
+ final String ps, final String data) {
+
+ int imageWidth = 0;
+ int imageHeight = 0;
+ boolean scroll = false;
+ try {
+ imageWidth = Integer.parseInt(pw);
+ imageHeight = Integer.parseInt(ph);
+ } catch (NumberFormatException e) {
+ // SQUASH
+ return;
+ }
+ if ((imageWidth < 1)
+ || (imageWidth > 10000)
+ || (imageHeight < 1)
+ || (imageHeight > 10000)
+ ) {
+ return;
+ }
+ if (ps.equals("1")) {
+ scroll = true;
+ } else if (ps.equals("0")) {
+ scroll = false;
+ } else {
+ return;
+ }
+
+ java.util.Base64.Decoder base64 = java.util.Base64.getDecoder();
+ byte [] bytes = base64.decode(data);
+ if (bytes.length != (imageWidth * imageHeight * 3)) {
+ return;
+ }
+
+ BufferedImage image = new BufferedImage(imageWidth, imageHeight,
+ BufferedImage.TYPE_INT_ARGB);
+
+ for (int x = 0; x < imageWidth; x++) {
+ for (int y = 0; y < imageHeight; y++) {
+ int red = bytes[(y * imageWidth * 3) + (x * 3) ];
+ if (red < 0) {
+ red += 256;
+ }
+ int green = bytes[(y * imageWidth * 3) + (x * 3) + 1];
+ if (green < 0) {
+ green += 256;
+ }
+ int blue = bytes[(y * imageWidth * 3) + (x * 3) + 2];
+ if (blue < 0) {
+ blue += 256;
+ }
+ int rgb = 0xFF000000 | (red << 16) | (green << 8) | blue;
+ image.setRGB(x, y, rgb);
+ }
+ }
+
+ /*
+ * Procedure:
+ *
+ * Break up the image into text cell sized pieces as a new array of
+ * Cells.
+ *
+ * Note original column position x0.
+ *
+ * For each cell:
+ *
+ * 1. Advance (printCharacter(' ')) for horizontal increment, or
+ * index (linefeed() + cursorPosition(y, x0)) for vertical
+ * increment.
+ *
+ * 2. Set (x, y) cell image data.
+ *
+ * 3. For the right and bottom edges:
+ *
+ * a. Render the text to pixels using Terminus font.
+ *
+ * b. Blit the image on top of the text, using alpha channel.
+ */
+ int cellColumns = image.getWidth() / textWidth;
+ if (cellColumns * textWidth < image.getWidth()) {
+ cellColumns++;
+ }
+ int cellRows = image.getHeight() / textHeight;
+ if (cellRows * textHeight < image.getHeight()) {
+ cellRows++;
+ }
+
+ // Break the image up into an array of cells.
+ Cell [][] cells = new Cell[cellColumns][cellRows];
+
+ for (int x = 0; x < cellColumns; x++) {
+ for (int y = 0; y < cellRows; y++) {
+
+ int width = textWidth;
+ if ((x + 1) * textWidth > image.getWidth()) {
+ width = image.getWidth() - (x * textWidth);
+ }
+ int height = textHeight;
+ if ((y + 1) * textHeight > image.getHeight()) {
+ height = image.getHeight() - (y * textHeight);
+ }
+
+ Cell cell = new Cell();
+ cell.setImage(image.getSubimage(x * textWidth,
+ y * textHeight, width, height));
+
+ cells[x][y] = cell;
+ }
+ }
+
+ int x0 = currentState.cursorX;
+ for (int y = 0; y < cellRows; y++) {
+ for (int x = 0; x < cellColumns; x++) {
+ assert (currentState.cursorX <= rightMargin);
+ DisplayLine line = display.get(currentState.cursorY);
+ line.replace(currentState.cursorX, cells[x][y]);
+ // If at the end of the visible screen, stop.
+ if (currentState.cursorX == rightMargin) {
+ break;
+ }
+ // Room for more image on the visible screen.
+ currentState.cursorX++;
+ }
+ if ((scroll == true)
+ || ((scroll == false)
+ && (currentState.cursorY < scrollRegionBottom))
+ ) {
+ linefeed();
+ }
+ cursorPosition(currentState.cursorY, x0);
+ }
+
+ }
+
+}
git://git.nikiroo.be / fanfix.git / blobdiff