| 1 | /* |
| 2 | * Jexer - Java Text User Interface |
| 3 | * |
| 4 | * The MIT License (MIT) |
| 5 | * |
| 6 | * Copyright (C) 2019 Kevin Lamonte |
| 7 | * |
| 8 | * Permission is hereby granted, free of charge, to any person obtaining a |
| 9 | * copy of this software and associated documentation files (the "Software"), |
| 10 | * to deal in the Software without restriction, including without limitation |
| 11 | * the rights to use, copy, modify, merge, publish, distribute, sublicense, |
| 12 | * and/or sell copies of the Software, and to permit persons to whom the |
| 13 | * Software is furnished to do so, subject to the following conditions: |
| 14 | * |
| 15 | * The above copyright notice and this permission notice shall be included in |
| 16 | * all copies or substantial portions of the Software. |
| 17 | * |
| 18 | * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR |
| 19 | * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, |
| 20 | * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL |
| 21 | * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER |
| 22 | * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING |
| 23 | * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER |
| 24 | * DEALINGS IN THE SOFTWARE. |
| 25 | * |
| 26 | * @author Kevin Lamonte [kevin.lamonte@gmail.com] |
| 27 | * @version 1 |
| 28 | */ |
| 29 | package jexer.backend; |
| 30 | |
| 31 | import java.awt.image.BufferedImage; |
| 32 | import java.io.BufferedReader; |
| 33 | import java.io.FileDescriptor; |
| 34 | import java.io.FileInputStream; |
| 35 | import java.io.InputStream; |
| 36 | import java.io.InputStreamReader; |
| 37 | import java.io.IOException; |
| 38 | import java.io.OutputStream; |
| 39 | import java.io.OutputStreamWriter; |
| 40 | import java.io.PrintWriter; |
| 41 | import java.io.Reader; |
| 42 | import java.io.UnsupportedEncodingException; |
| 43 | import java.util.ArrayList; |
| 44 | import java.util.Collections; |
| 45 | import java.util.HashMap; |
| 46 | import java.util.List; |
| 47 | import java.util.LinkedList; |
| 48 | import java.util.Map; |
| 49 | |
| 50 | import jexer.TImage; |
| 51 | import jexer.bits.Cell; |
| 52 | import jexer.bits.CellAttributes; |
| 53 | import jexer.bits.Color; |
| 54 | import jexer.event.TInputEvent; |
| 55 | import jexer.event.TKeypressEvent; |
| 56 | import jexer.event.TMouseEvent; |
| 57 | import jexer.event.TResizeEvent; |
| 58 | import static jexer.TKeypress.*; |
| 59 | |
| 60 | /** |
| 61 | * This class reads keystrokes and mouse events and emits output to ANSI |
| 62 | * X3.64 / ECMA-48 type terminals e.g. xterm, linux, vt100, ansi.sys, etc. |
| 63 | */ |
| 64 | public class ECMA48Terminal extends LogicalScreen |
| 65 | implements TerminalReader, Runnable { |
| 66 | |
| 67 | // ------------------------------------------------------------------------ |
| 68 | // Constants -------------------------------------------------------------- |
| 69 | // ------------------------------------------------------------------------ |
| 70 | |
| 71 | /** |
| 72 | * States in the input parser. |
| 73 | */ |
| 74 | private enum ParseState { |
| 75 | GROUND, |
| 76 | ESCAPE, |
| 77 | ESCAPE_INTERMEDIATE, |
| 78 | CSI_ENTRY, |
| 79 | CSI_PARAM, |
| 80 | MOUSE, |
| 81 | MOUSE_SGR, |
| 82 | } |
| 83 | |
| 84 | /** |
| 85 | * Number of colors in the sixel palette. Xterm 335 defines the max as |
| 86 | * 1024. |
| 87 | */ |
| 88 | private static final int MAX_COLOR_REGISTERS = 1024; |
| 89 | |
| 90 | // ------------------------------------------------------------------------ |
| 91 | // Variables -------------------------------------------------------------- |
| 92 | // ------------------------------------------------------------------------ |
| 93 | |
| 94 | /** |
| 95 | * Emit debugging to stderr. |
| 96 | */ |
| 97 | private boolean debugToStderr = false; |
| 98 | |
| 99 | /** |
| 100 | * If true, emit T.416-style RGB colors for normal system colors. This |
| 101 | * is a) expensive in bandwidth, and b) potentially terrible looking for |
| 102 | * non-xterms. |
| 103 | */ |
| 104 | private static boolean doRgbColor = false; |
| 105 | |
| 106 | /** |
| 107 | * The session information. |
| 108 | */ |
| 109 | private SessionInfo sessionInfo; |
| 110 | |
| 111 | /** |
| 112 | * The event queue, filled up by a thread reading on input. |
| 113 | */ |
| 114 | private List<TInputEvent> eventQueue; |
| 115 | |
| 116 | /** |
| 117 | * If true, we want the reader thread to exit gracefully. |
| 118 | */ |
| 119 | private boolean stopReaderThread; |
| 120 | |
| 121 | /** |
| 122 | * The reader thread. |
| 123 | */ |
| 124 | private Thread readerThread; |
| 125 | |
| 126 | /** |
| 127 | * Parameters being collected. E.g. if the string is \033[1;3m, then |
| 128 | * params[0] will be 1 and params[1] will be 3. |
| 129 | */ |
| 130 | private List<String> params; |
| 131 | |
| 132 | /** |
| 133 | * Current parsing state. |
| 134 | */ |
| 135 | private ParseState state; |
| 136 | |
| 137 | /** |
| 138 | * The time we entered ESCAPE. If we get a bare escape without a code |
| 139 | * following it, this is used to return that bare escape. |
| 140 | */ |
| 141 | private long escapeTime; |
| 142 | |
| 143 | /** |
| 144 | * The time we last checked the window size. We try not to spawn stty |
| 145 | * more than once per second. |
| 146 | */ |
| 147 | private long windowSizeTime; |
| 148 | |
| 149 | /** |
| 150 | * true if mouse1 was down. Used to report mouse1 on the release event. |
| 151 | */ |
| 152 | private boolean mouse1; |
| 153 | |
| 154 | /** |
| 155 | * true if mouse2 was down. Used to report mouse2 on the release event. |
| 156 | */ |
| 157 | private boolean mouse2; |
| 158 | |
| 159 | /** |
| 160 | * true if mouse3 was down. Used to report mouse3 on the release event. |
| 161 | */ |
| 162 | private boolean mouse3; |
| 163 | |
| 164 | /** |
| 165 | * Cache the cursor visibility value so we only emit the sequence when we |
| 166 | * need to. |
| 167 | */ |
| 168 | private boolean cursorOn = true; |
| 169 | |
| 170 | /** |
| 171 | * Cache the last window size to figure out if a TResizeEvent needs to be |
| 172 | * generated. |
| 173 | */ |
| 174 | private TResizeEvent windowResize = null; |
| 175 | |
| 176 | /** |
| 177 | * Window width in pixels. Used for sixel support. |
| 178 | */ |
| 179 | private int widthPixels = 640; |
| 180 | |
| 181 | /** |
| 182 | * Window height in pixels. Used for sixel support. |
| 183 | */ |
| 184 | private int heightPixels = 400; |
| 185 | |
| 186 | /** |
| 187 | * If true, emit image data via sixel. |
| 188 | */ |
| 189 | private boolean sixel = true; |
| 190 | |
| 191 | /** |
| 192 | * The sixel palette handler. |
| 193 | */ |
| 194 | private SixelPalette palette = null; |
| 195 | |
| 196 | /** |
| 197 | * The sixel post-rendered string cache. |
| 198 | */ |
| 199 | private SixelCache sixelCache = null; |
| 200 | |
| 201 | /** |
| 202 | * If true, then we changed System.in and need to change it back. |
| 203 | */ |
| 204 | private boolean setRawMode; |
| 205 | |
| 206 | /** |
| 207 | * The terminal's input. If an InputStream is not specified in the |
| 208 | * constructor, then this InputStreamReader will be bound to System.in |
| 209 | * with UTF-8 encoding. |
| 210 | */ |
| 211 | private Reader input; |
| 212 | |
| 213 | /** |
| 214 | * The terminal's raw InputStream. If an InputStream is not specified in |
| 215 | * the constructor, then this InputReader will be bound to System.in. |
| 216 | * This is used by run() to see if bytes are available() before calling |
| 217 | * (Reader)input.read(). |
| 218 | */ |
| 219 | private InputStream inputStream; |
| 220 | |
| 221 | /** |
| 222 | * The terminal's output. If an OutputStream is not specified in the |
| 223 | * constructor, then this PrintWriter will be bound to System.out with |
| 224 | * UTF-8 encoding. |
| 225 | */ |
| 226 | private PrintWriter output; |
| 227 | |
| 228 | /** |
| 229 | * The listening object that run() wakes up on new input. |
| 230 | */ |
| 231 | private Object listener; |
| 232 | |
| 233 | /** |
| 234 | * SixelPalette is used to manage the conversion of images between 24-bit |
| 235 | * RGB color and a palette of MAX_COLOR_REGISTERS colors. |
| 236 | */ |
| 237 | private class SixelPalette { |
| 238 | |
| 239 | /** |
| 240 | * Color palette for sixel output, sorted low to high. |
| 241 | */ |
| 242 | private List<Integer> rgbColors = new ArrayList<Integer>(); |
| 243 | |
| 244 | /** |
| 245 | * Map of color palette index for sixel output, from the order it was |
| 246 | * generated by makePalette() to rgbColors. |
| 247 | */ |
| 248 | private int [] rgbSortedIndex = new int[MAX_COLOR_REGISTERS]; |
| 249 | |
| 250 | /** |
| 251 | * The color palette, organized by hue, saturation, and luminance. |
| 252 | * This is used for a fast color match. |
| 253 | */ |
| 254 | private ArrayList<ArrayList<ArrayList<ColorIdx>>> hslColors; |
| 255 | |
| 256 | /** |
| 257 | * Number of bits for hue. |
| 258 | */ |
| 259 | private int hueBits = -1; |
| 260 | |
| 261 | /** |
| 262 | * Number of bits for saturation. |
| 263 | */ |
| 264 | private int satBits = -1; |
| 265 | |
| 266 | /** |
| 267 | * Number of bits for luminance. |
| 268 | */ |
| 269 | private int lumBits = -1; |
| 270 | |
| 271 | /** |
| 272 | * Step size for hue bins. |
| 273 | */ |
| 274 | private int hueStep = -1; |
| 275 | |
| 276 | /** |
| 277 | * Step size for saturation bins. |
| 278 | */ |
| 279 | private int satStep = -1; |
| 280 | |
| 281 | /** |
| 282 | * Cached RGB to HSL result. |
| 283 | */ |
| 284 | private int hsl[] = new int[3]; |
| 285 | |
| 286 | /** |
| 287 | * ColorIdx records a RGB color and its palette index. |
| 288 | */ |
| 289 | private class ColorIdx { |
| 290 | /** |
| 291 | * The 24-bit RGB color. |
| 292 | */ |
| 293 | public int color; |
| 294 | |
| 295 | /** |
| 296 | * The palette index for this color. |
| 297 | */ |
| 298 | public int index; |
| 299 | |
| 300 | /** |
| 301 | * Public constructor. |
| 302 | * |
| 303 | * @param color the 24-bit RGB color |
| 304 | * @param index the palette index for this color |
| 305 | */ |
| 306 | public ColorIdx(final int color, final int index) { |
| 307 | this.color = color; |
| 308 | this.index = index; |
| 309 | } |
| 310 | } |
| 311 | |
| 312 | /** |
| 313 | * Public constructor. |
| 314 | */ |
| 315 | public SixelPalette() { |
| 316 | makePalette(); |
| 317 | } |
| 318 | |
| 319 | /** |
| 320 | * Find the nearest match for a color in the palette. |
| 321 | * |
| 322 | * @param color the RGB color |
| 323 | * @return the index in rgbColors that is closest to color |
| 324 | */ |
| 325 | public int matchColor(final int color) { |
| 326 | |
| 327 | assert (color >= 0); |
| 328 | |
| 329 | /* |
| 330 | * matchColor() is a critical performance bottleneck. To make it |
| 331 | * decent, we do the following: |
| 332 | * |
| 333 | * 1. Find the nearest two hues that bracket this color. |
| 334 | * |
| 335 | * 2. Find the nearest two saturations that bracket this color. |
| 336 | * |
| 337 | * 3. Iterate within these four bands of luminance values, |
| 338 | * returning the closest color by Euclidean distance. |
| 339 | * |
| 340 | * This strategy reduces the search space by about 97%. |
| 341 | */ |
| 342 | int red = (color >>> 16) & 0xFF; |
| 343 | int green = (color >>> 8) & 0xFF; |
| 344 | int blue = color & 0xFF; |
| 345 | |
| 346 | rgbToHsl(red, green, blue, hsl); |
| 347 | int hue = hsl[0]; |
| 348 | int sat = hsl[1]; |
| 349 | int lum = hsl[2]; |
| 350 | // System.err.printf("%d %d %d\n", hue, sat, lum); |
| 351 | |
| 352 | double diff = Double.MAX_VALUE; |
| 353 | int idx = -1; |
| 354 | |
| 355 | int hue1 = hue / (360/hueStep); |
| 356 | int hue2 = hue1 + 1; |
| 357 | if (hue1 >= hslColors.size() - 1) { |
| 358 | // Bracket pure red from above. |
| 359 | hue1 = hslColors.size() - 1; |
| 360 | hue2 = 0; |
| 361 | } else if (hue1 == 0) { |
| 362 | // Bracket pure red from below. |
| 363 | hue2 = hslColors.size() - 1; |
| 364 | } |
| 365 | |
| 366 | for (int hI = hue1; hI != -1;) { |
| 367 | ArrayList<ArrayList<ColorIdx>> sats = hslColors.get(hI); |
| 368 | if (hI == hue1) { |
| 369 | hI = hue2; |
| 370 | } else if (hI == hue2) { |
| 371 | hI = -1; |
| 372 | } |
| 373 | |
| 374 | int sMin = (sat / satStep) - 1; |
| 375 | int sMax = sMin + 1; |
| 376 | if (sMin < 0) { |
| 377 | sMin = 0; |
| 378 | sMax = 1; |
| 379 | } else if (sMin == sats.size() - 1) { |
| 380 | sMax = sMin; |
| 381 | sMin--; |
| 382 | } |
| 383 | assert (sMin >= 0); |
| 384 | assert (sMax - sMin == 1); |
| 385 | |
| 386 | // int sMin = 0; |
| 387 | // int sMax = sats.size() - 1; |
| 388 | |
| 389 | for (int sI = sMin; sI <= sMax; sI++) { |
| 390 | ArrayList<ColorIdx> lums = sats.get(sI); |
| 391 | |
| 392 | // True 3D colorspace match for the remaining values |
| 393 | for (ColorIdx c: lums) { |
| 394 | int rgbColor = c.color; |
| 395 | double newDiff = 0; |
| 396 | int red2 = (rgbColor >>> 16) & 0xFF; |
| 397 | int green2 = (rgbColor >>> 8) & 0xFF; |
| 398 | int blue2 = rgbColor & 0xFF; |
| 399 | newDiff += Math.pow(red2 - red, 2); |
| 400 | newDiff += Math.pow(green2 - green, 2); |
| 401 | newDiff += Math.pow(blue2 - blue, 2); |
| 402 | if (newDiff < diff) { |
| 403 | idx = rgbSortedIndex[c.index]; |
| 404 | diff = newDiff; |
| 405 | } |
| 406 | } |
| 407 | } |
| 408 | } |
| 409 | |
| 410 | if (((red * red) + (green * green) + (blue * blue)) < diff) { |
| 411 | // Black is a closer match. |
| 412 | idx = 0; |
| 413 | } else if ((((255 - red) * (255 - red)) + |
| 414 | ((255 - green) * (255 - green)) + |
| 415 | ((255 - blue) * (255 - blue))) < diff) { |
| 416 | |
| 417 | // White is a closer match. |
| 418 | idx = MAX_COLOR_REGISTERS - 1; |
| 419 | } |
| 420 | assert (idx != -1); |
| 421 | return idx; |
| 422 | } |
| 423 | |
| 424 | /** |
| 425 | * Clamp an int value to [0, 255]. |
| 426 | * |
| 427 | * @param x the int value |
| 428 | * @return an int between 0 and 255. |
| 429 | */ |
| 430 | private int clamp(final int x) { |
| 431 | if (x < 0) { |
| 432 | return 0; |
| 433 | } |
| 434 | if (x > 255) { |
| 435 | return 255; |
| 436 | } |
| 437 | return x; |
| 438 | } |
| 439 | |
| 440 | /** |
| 441 | * Dither an image to a MAX_COLOR_REGISTERS palette. The dithered |
| 442 | * image cells will contain indexes into the palette. |
| 443 | * |
| 444 | * @param image the image to dither |
| 445 | * @return the dithered image. Every pixel is an index into the |
| 446 | * palette. |
| 447 | */ |
| 448 | public BufferedImage ditherImage(final BufferedImage image) { |
| 449 | |
| 450 | BufferedImage ditheredImage = new BufferedImage(image.getWidth(), |
| 451 | image.getHeight(), BufferedImage.TYPE_INT_ARGB); |
| 452 | |
| 453 | int [] rgbArray = image.getRGB(0, 0, image.getWidth(), |
| 454 | image.getHeight(), null, 0, image.getWidth()); |
| 455 | ditheredImage.setRGB(0, 0, image.getWidth(), image.getHeight(), |
| 456 | rgbArray, 0, image.getWidth()); |
| 457 | |
| 458 | for (int imageY = 0; imageY < image.getHeight(); imageY++) { |
| 459 | for (int imageX = 0; imageX < image.getWidth(); imageX++) { |
| 460 | int oldPixel = ditheredImage.getRGB(imageX, |
| 461 | imageY) & 0xFFFFFF; |
| 462 | int colorIdx = matchColor(oldPixel); |
| 463 | assert (colorIdx >= 0); |
| 464 | assert (colorIdx < MAX_COLOR_REGISTERS); |
| 465 | int newPixel = rgbColors.get(colorIdx); |
| 466 | ditheredImage.setRGB(imageX, imageY, colorIdx); |
| 467 | |
| 468 | int oldRed = (oldPixel >>> 16) & 0xFF; |
| 469 | int oldGreen = (oldPixel >>> 8) & 0xFF; |
| 470 | int oldBlue = oldPixel & 0xFF; |
| 471 | |
| 472 | int newRed = (newPixel >>> 16) & 0xFF; |
| 473 | int newGreen = (newPixel >>> 8) & 0xFF; |
| 474 | int newBlue = newPixel & 0xFF; |
| 475 | |
| 476 | int redError = (oldRed - newRed) / 16; |
| 477 | int greenError = (oldGreen - newGreen) / 16; |
| 478 | int blueError = (oldBlue - newBlue) / 16; |
| 479 | |
| 480 | int red, green, blue; |
| 481 | if (imageX < image.getWidth() - 1) { |
| 482 | int pXpY = ditheredImage.getRGB(imageX + 1, imageY); |
| 483 | red = (int) ((pXpY >>> 16) & 0xFF) + (7 * redError); |
| 484 | green = (int) ((pXpY >>> 8) & 0xFF) + (7 * greenError); |
| 485 | blue = (int) ( pXpY & 0xFF) + (7 * blueError); |
| 486 | red = clamp(red); |
| 487 | green = clamp(green); |
| 488 | blue = clamp(blue); |
| 489 | pXpY = ((red & 0xFF) << 16); |
| 490 | pXpY |= ((green & 0xFF) << 8) | (blue & 0xFF); |
| 491 | ditheredImage.setRGB(imageX + 1, imageY, pXpY); |
| 492 | |
| 493 | if (imageY < image.getHeight() - 1) { |
| 494 | int pXpYp = ditheredImage.getRGB(imageX + 1, |
| 495 | imageY + 1); |
| 496 | red = (int) ((pXpYp >>> 16) & 0xFF) + redError; |
| 497 | green = (int) ((pXpYp >>> 8) & 0xFF) + greenError; |
| 498 | blue = (int) ( pXpYp & 0xFF) + blueError; |
| 499 | red = clamp(red); |
| 500 | green = clamp(green); |
| 501 | blue = clamp(blue); |
| 502 | pXpYp = ((red & 0xFF) << 16); |
| 503 | pXpYp |= ((green & 0xFF) << 8) | (blue & 0xFF); |
| 504 | ditheredImage.setRGB(imageX + 1, imageY + 1, pXpYp); |
| 505 | } |
| 506 | } else if (imageY < image.getHeight() - 1) { |
| 507 | int pXmYp = ditheredImage.getRGB(imageX - 1, |
| 508 | imageY + 1); |
| 509 | int pXYp = ditheredImage.getRGB(imageX, |
| 510 | imageY + 1); |
| 511 | |
| 512 | red = (int) ((pXmYp >>> 16) & 0xFF) + (3 * redError); |
| 513 | green = (int) ((pXmYp >>> 8) & 0xFF) + (3 * greenError); |
| 514 | blue = (int) ( pXmYp & 0xFF) + (3 * blueError); |
| 515 | red = clamp(red); |
| 516 | green = clamp(green); |
| 517 | blue = clamp(blue); |
| 518 | pXmYp = ((red & 0xFF) << 16); |
| 519 | pXmYp |= ((green & 0xFF) << 8) | (blue & 0xFF); |
| 520 | ditheredImage.setRGB(imageX - 1, imageY + 1, pXmYp); |
| 521 | |
| 522 | red = (int) ((pXYp >>> 16) & 0xFF) + (5 * redError); |
| 523 | green = (int) ((pXYp >>> 8) & 0xFF) + (5 * greenError); |
| 524 | blue = (int) ( pXYp & 0xFF) + (5 * blueError); |
| 525 | red = clamp(red); |
| 526 | green = clamp(green); |
| 527 | blue = clamp(blue); |
| 528 | pXYp = ((red & 0xFF) << 16); |
| 529 | pXYp |= ((green & 0xFF) << 8) | (blue & 0xFF); |
| 530 | ditheredImage.setRGB(imageX, imageY + 1, pXYp); |
| 531 | } |
| 532 | } // for (int imageY = 0; imageY < image.getHeight(); imageY++) |
| 533 | } // for (int imageX = 0; imageX < image.getWidth(); imageX++) |
| 534 | |
| 535 | return ditheredImage; |
| 536 | } |
| 537 | |
| 538 | /** |
| 539 | * Convert an RGB color to HSL. |
| 540 | * |
| 541 | * @param red red color, between 0 and 255 |
| 542 | * @param green green color, between 0 and 255 |
| 543 | * @param blue blue color, between 0 and 255 |
| 544 | * @param hsl the hsl color as [hue, saturation, luminance] |
| 545 | */ |
| 546 | private void rgbToHsl(final int red, final int green, |
| 547 | final int blue, final int [] hsl) { |
| 548 | |
| 549 | assert ((red >= 0) && (red <= 255)); |
| 550 | assert ((green >= 0) && (green <= 255)); |
| 551 | assert ((blue >= 0) && (blue <= 255)); |
| 552 | |
| 553 | double R = red / 255.0; |
| 554 | double G = green / 255.0; |
| 555 | double B = blue / 255.0; |
| 556 | boolean Rmax = false; |
| 557 | boolean Gmax = false; |
| 558 | boolean Bmax = false; |
| 559 | double min = (R < G ? R : G); |
| 560 | min = (min < B ? min : B); |
| 561 | double max = 0; |
| 562 | if ((R >= G) && (R >= B)) { |
| 563 | max = R; |
| 564 | Rmax = true; |
| 565 | } else if ((G >= R) && (G >= B)) { |
| 566 | max = G; |
| 567 | Gmax = true; |
| 568 | } else if ((B >= G) && (B >= R)) { |
| 569 | max = B; |
| 570 | Bmax = true; |
| 571 | } |
| 572 | |
| 573 | double L = (min + max) / 2.0; |
| 574 | double H = 0.0; |
| 575 | double S = 0.0; |
| 576 | if (min != max) { |
| 577 | if (L < 0.5) { |
| 578 | S = (max - min) / (max + min); |
| 579 | } else { |
| 580 | S = (max - min) / (2.0 - max - min); |
| 581 | } |
| 582 | } |
| 583 | if (Rmax) { |
| 584 | assert (Gmax == false); |
| 585 | assert (Bmax == false); |
| 586 | H = (G - B) / (max - min); |
| 587 | } else if (Gmax) { |
| 588 | assert (Rmax == false); |
| 589 | assert (Bmax == false); |
| 590 | H = 2.0 + (B - R) / (max - min); |
| 591 | } else if (Bmax) { |
| 592 | assert (Rmax == false); |
| 593 | assert (Gmax == false); |
| 594 | H = 4.0 + (R - G) / (max - min); |
| 595 | } |
| 596 | if (H < 0.0) { |
| 597 | H += 6.0; |
| 598 | } |
| 599 | hsl[0] = (int) (H * 60.0); |
| 600 | hsl[1] = (int) (S * 100.0); |
| 601 | hsl[2] = (int) (L * 100.0); |
| 602 | |
| 603 | assert ((hsl[0] >= 0) && (hsl[0] <= 360)); |
| 604 | assert ((hsl[1] >= 0) && (hsl[1] <= 100)); |
| 605 | assert ((hsl[2] >= 0) && (hsl[2] <= 100)); |
| 606 | } |
| 607 | |
| 608 | /** |
| 609 | * Convert a HSL color to RGB. |
| 610 | * |
| 611 | * @param hue hue, between 0 and 359 |
| 612 | * @param sat saturation, between 0 and 100 |
| 613 | * @param lum luminance, between 0 and 100 |
| 614 | * @return the rgb color as 0x00RRGGBB |
| 615 | */ |
| 616 | private int hslToRgb(final int hue, final int sat, final int lum) { |
| 617 | assert ((hue >= 0) && (hue <= 360)); |
| 618 | assert ((sat >= 0) && (sat <= 100)); |
| 619 | assert ((lum >= 0) && (lum <= 100)); |
| 620 | |
| 621 | double S = sat / 100.0; |
| 622 | double L = lum / 100.0; |
| 623 | double C = (1.0 - Math.abs((2.0 * L) - 1.0)) * S; |
| 624 | double Hp = hue / 60.0; |
| 625 | double X = C * (1.0 - Math.abs((Hp % 2) - 1.0)); |
| 626 | double Rp = 0.0; |
| 627 | double Gp = 0.0; |
| 628 | double Bp = 0.0; |
| 629 | if (Hp <= 1.0) { |
| 630 | Rp = C; |
| 631 | Gp = X; |
| 632 | } else if (Hp <= 2.0) { |
| 633 | Rp = X; |
| 634 | Gp = C; |
| 635 | } else if (Hp <= 3.0) { |
| 636 | Gp = C; |
| 637 | Bp = X; |
| 638 | } else if (Hp <= 4.0) { |
| 639 | Gp = X; |
| 640 | Bp = C; |
| 641 | } else if (Hp <= 5.0) { |
| 642 | Rp = X; |
| 643 | Bp = C; |
| 644 | } else if (Hp <= 6.0) { |
| 645 | Rp = C; |
| 646 | Bp = X; |
| 647 | } |
| 648 | double m = L - (C / 2.0); |
| 649 | int red = ((int) ((Rp + m) * 255.0)) << 16; |
| 650 | int green = ((int) ((Gp + m) * 255.0)) << 8; |
| 651 | int blue = (int) ((Bp + m) * 255.0); |
| 652 | |
| 653 | return (red | green | blue); |
| 654 | } |
| 655 | |
| 656 | /** |
| 657 | * Create the sixel palette. |
| 658 | */ |
| 659 | private void makePalette() { |
| 660 | // Generate the sixel palette. Because we have no idea at this |
| 661 | // layer which image(s) will be shown, we have to use a common |
| 662 | // palette with MAX_COLOR_REGISTERS colors for everything, and |
| 663 | // map the BufferedImage colors to their nearest neighbor in RGB |
| 664 | // space. |
| 665 | |
| 666 | // We build a palette using the Hue-Saturation-Luminence model, |
| 667 | // with 5+ bits for Hue, 2+ bits for Saturation, and 1+ bit for |
| 668 | // Luminance. We convert these colors to 24-bit RGB, sort them |
| 669 | // ascending, and steal the first index for pure black and the |
| 670 | // last for pure white. The 8-bit final palette favors bright |
| 671 | // colors, somewhere between pastel and classic television |
| 672 | // technicolor. 9- and 10-bit palettes are more uniform. |
| 673 | |
| 674 | // Default at 256 colors. |
| 675 | hueBits = 5; |
| 676 | satBits = 2; |
| 677 | lumBits = 1; |
| 678 | |
| 679 | assert (MAX_COLOR_REGISTERS >= 256); |
| 680 | assert ((MAX_COLOR_REGISTERS == 256) |
| 681 | || (MAX_COLOR_REGISTERS == 512) |
| 682 | || (MAX_COLOR_REGISTERS == 1024) |
| 683 | || (MAX_COLOR_REGISTERS == 2048)); |
| 684 | |
| 685 | switch (MAX_COLOR_REGISTERS) { |
| 686 | case 512: |
| 687 | hueBits = 5; |
| 688 | satBits = 2; |
| 689 | lumBits = 2; |
| 690 | break; |
| 691 | case 1024: |
| 692 | hueBits = 5; |
| 693 | satBits = 2; |
| 694 | lumBits = 3; |
| 695 | break; |
| 696 | case 2048: |
| 697 | hueBits = 5; |
| 698 | satBits = 3; |
| 699 | lumBits = 3; |
| 700 | break; |
| 701 | } |
| 702 | hueStep = (int) (Math.pow(2, hueBits)); |
| 703 | satStep = (int) (100 / Math.pow(2, satBits)); |
| 704 | // 1 bit for luminance: 40 and 70. |
| 705 | int lumBegin = 40; |
| 706 | int lumStep = 30; |
| 707 | switch (lumBits) { |
| 708 | case 2: |
| 709 | // 2 bits: 20, 40, 60, 80 |
| 710 | lumBegin = 20; |
| 711 | lumStep = 20; |
| 712 | break; |
| 713 | case 3: |
| 714 | // 3 bits: 8, 20, 32, 44, 56, 68, 80, 92 |
| 715 | lumBegin = 8; |
| 716 | lumStep = 12; |
| 717 | break; |
| 718 | } |
| 719 | |
| 720 | // System.err.printf("<html><body>\n"); |
| 721 | // Hue is evenly spaced around the wheel. |
| 722 | hslColors = new ArrayList<ArrayList<ArrayList<ColorIdx>>>(); |
| 723 | |
| 724 | final boolean DEBUG = false; |
| 725 | ArrayList<Integer> rawRgbList = new ArrayList<Integer>(); |
| 726 | |
| 727 | for (int hue = 0; hue < (360 - (360 % hueStep)); |
| 728 | hue += (360/hueStep)) { |
| 729 | |
| 730 | ArrayList<ArrayList<ColorIdx>> satList = null; |
| 731 | satList = new ArrayList<ArrayList<ColorIdx>>(); |
| 732 | hslColors.add(satList); |
| 733 | |
| 734 | // Saturation is linearly spaced between pastel and pure. |
| 735 | for (int sat = satStep; sat <= 100; sat += satStep) { |
| 736 | |
| 737 | ArrayList<ColorIdx> lumList = new ArrayList<ColorIdx>(); |
| 738 | satList.add(lumList); |
| 739 | |
| 740 | // Luminance brackets the pure color, but leaning toward |
| 741 | // lighter. |
| 742 | for (int lum = lumBegin; lum < 100; lum += lumStep) { |
| 743 | /* |
| 744 | System.err.printf("<font style = \"color:"); |
| 745 | System.err.printf("hsl(%d, %d%%, %d%%)", |
| 746 | hue, sat, lum); |
| 747 | System.err.printf(";\">=</font>\n"); |
| 748 | */ |
| 749 | int rgbColor = hslToRgb(hue, sat, lum); |
| 750 | rgbColors.add(rgbColor); |
| 751 | ColorIdx colorIdx = new ColorIdx(rgbColor, |
| 752 | rgbColors.size() - 1); |
| 753 | lumList.add(colorIdx); |
| 754 | |
| 755 | rawRgbList.add(rgbColor); |
| 756 | if (DEBUG) { |
| 757 | int red = (rgbColor >>> 16) & 0xFF; |
| 758 | int green = (rgbColor >>> 8) & 0xFF; |
| 759 | int blue = rgbColor & 0xFF; |
| 760 | int [] backToHsl = new int[3]; |
| 761 | rgbToHsl(red, green, blue, backToHsl); |
| 762 | System.err.printf("%d [%d] %d [%d] %d [%d]\n", |
| 763 | hue, backToHsl[0], sat, backToHsl[1], |
| 764 | lum, backToHsl[2]); |
| 765 | } |
| 766 | } |
| 767 | } |
| 768 | } |
| 769 | // System.err.printf("\n</body></html>\n"); |
| 770 | |
| 771 | assert (rgbColors.size() == MAX_COLOR_REGISTERS); |
| 772 | |
| 773 | /* |
| 774 | * We need to sort rgbColors, so that toSixel() can know where |
| 775 | * BLACK and WHITE are in it. But we also need to be able to |
| 776 | * find the sorted values using the old unsorted indexes. So we |
| 777 | * will sort it, put all the indexes into a HashMap, and then |
| 778 | * build rgbSortedIndex[]. |
| 779 | */ |
| 780 | Collections.sort(rgbColors); |
| 781 | HashMap<Integer, Integer> rgbColorIndices = null; |
| 782 | rgbColorIndices = new HashMap<Integer, Integer>(); |
| 783 | for (int i = 0; i < MAX_COLOR_REGISTERS; i++) { |
| 784 | rgbColorIndices.put(rgbColors.get(i), i); |
| 785 | } |
| 786 | for (int i = 0; i < MAX_COLOR_REGISTERS; i++) { |
| 787 | int rawColor = rawRgbList.get(i); |
| 788 | rgbSortedIndex[i] = rgbColorIndices.get(rawColor); |
| 789 | } |
| 790 | if (DEBUG) { |
| 791 | for (int i = 0; i < MAX_COLOR_REGISTERS; i++) { |
| 792 | assert (rawRgbList != null); |
| 793 | int idx = rgbSortedIndex[i]; |
| 794 | int rgbColor = rgbColors.get(idx); |
| 795 | if ((idx != 0) && (idx != MAX_COLOR_REGISTERS - 1)) { |
| 796 | /* |
| 797 | System.err.printf("%d %06x --> %d %06x\n", |
| 798 | i, rawRgbList.get(i), idx, rgbColors.get(idx)); |
| 799 | */ |
| 800 | assert (rgbColor == rawRgbList.get(i)); |
| 801 | } |
| 802 | } |
| 803 | } |
| 804 | |
| 805 | // Set the dimmest color as true black, and the brightest as true |
| 806 | // white. |
| 807 | rgbColors.set(0, 0); |
| 808 | rgbColors.set(MAX_COLOR_REGISTERS - 1, 0xFFFFFF); |
| 809 | |
| 810 | /* |
| 811 | System.err.printf("<html><body>\n"); |
| 812 | for (Integer rgb: rgbColors) { |
| 813 | System.err.printf("<font style = \"color:"); |
| 814 | System.err.printf("#%06x", rgb); |
| 815 | System.err.printf(";\">=</font>\n"); |
| 816 | } |
| 817 | System.err.printf("\n</body></html>\n"); |
| 818 | */ |
| 819 | |
| 820 | } |
| 821 | |
| 822 | /** |
| 823 | * Emit the sixel palette. |
| 824 | * |
| 825 | * @param sb the StringBuilder to append to |
| 826 | * @param used array of booleans set to true for each color actually |
| 827 | * used in this cell, or null to emit the entire palette |
| 828 | * @return the string to emit to an ANSI / ECMA-style terminal |
| 829 | */ |
| 830 | public String emitPalette(final StringBuilder sb, |
| 831 | final boolean [] used) { |
| 832 | |
| 833 | for (int i = 0; i < MAX_COLOR_REGISTERS; i++) { |
| 834 | if (((used != null) && (used[i] == true)) || (used == null)) { |
| 835 | int rgbColor = rgbColors.get(i); |
| 836 | sb.append(String.format("#%d;2;%d;%d;%d", i, |
| 837 | ((rgbColor >>> 16) & 0xFF) * 100 / 255, |
| 838 | ((rgbColor >>> 8) & 0xFF) * 100 / 255, |
| 839 | ( rgbColor & 0xFF) * 100 / 255)); |
| 840 | } |
| 841 | } |
| 842 | return sb.toString(); |
| 843 | } |
| 844 | } |
| 845 | |
| 846 | /** |
| 847 | * SixelCache is a least-recently-used cache that hangs on to the |
| 848 | * post-rendered sixel string for a particular set of cells. |
| 849 | */ |
| 850 | private class SixelCache { |
| 851 | |
| 852 | /** |
| 853 | * Maximum size of the cache. |
| 854 | */ |
| 855 | private int maxSize = 100; |
| 856 | |
| 857 | /** |
| 858 | * The entries stored in the cache. |
| 859 | */ |
| 860 | private HashMap<String, CacheEntry> cache = null; |
| 861 | |
| 862 | /** |
| 863 | * CacheEntry is one entry in the cache. |
| 864 | */ |
| 865 | private class CacheEntry { |
| 866 | /** |
| 867 | * The cache key. |
| 868 | */ |
| 869 | public String key; |
| 870 | |
| 871 | /** |
| 872 | * The cache data. |
| 873 | */ |
| 874 | public String data; |
| 875 | |
| 876 | /** |
| 877 | * The last time this entry was used. |
| 878 | */ |
| 879 | public long millis = 0; |
| 880 | |
| 881 | /** |
| 882 | * Public constructor. |
| 883 | * |
| 884 | * @param key the cache entry key |
| 885 | * @param data the cache entry data |
| 886 | */ |
| 887 | public CacheEntry(final String key, final String data) { |
| 888 | this.key = key; |
| 889 | this.data = data; |
| 890 | this.millis = System.currentTimeMillis(); |
| 891 | } |
| 892 | } |
| 893 | |
| 894 | /** |
| 895 | * Public constructor. |
| 896 | * |
| 897 | * @param maxSize the maximum size of the cache |
| 898 | */ |
| 899 | public SixelCache(final int maxSize) { |
| 900 | this.maxSize = maxSize; |
| 901 | cache = new HashMap<String, CacheEntry>(); |
| 902 | } |
| 903 | |
| 904 | /** |
| 905 | * Make a unique key for a list of cells. |
| 906 | * |
| 907 | * @param cells the cells |
| 908 | * @return the key |
| 909 | */ |
| 910 | private String makeKey(final ArrayList<Cell> cells) { |
| 911 | StringBuilder sb = new StringBuilder(); |
| 912 | for (Cell cell: cells) { |
| 913 | sb.append(cell.hashCode()); |
| 914 | } |
| 915 | return sb.toString(); |
| 916 | } |
| 917 | |
| 918 | /** |
| 919 | * Get an entry from the cache. |
| 920 | * |
| 921 | * @param cells the list of cells that are the cache key |
| 922 | * @return the sixel string representing these cells, or null if this |
| 923 | * list of cells is not in the cache |
| 924 | */ |
| 925 | public String get(final ArrayList<Cell> cells) { |
| 926 | CacheEntry entry = cache.get(makeKey(cells)); |
| 927 | if (entry == null) { |
| 928 | return null; |
| 929 | } |
| 930 | entry.millis = System.currentTimeMillis(); |
| 931 | return entry.data; |
| 932 | } |
| 933 | |
| 934 | /** |
| 935 | * Put an entry into the cache. |
| 936 | * |
| 937 | * @param cells the list of cells that are the cache key |
| 938 | * @param data the sixel string representing these cells |
| 939 | */ |
| 940 | public void put(final ArrayList<Cell> cells, final String data) { |
| 941 | String key = makeKey(cells); |
| 942 | |
| 943 | // System.err.println("put() " + key + " size " + cache.size()); |
| 944 | |
| 945 | assert (!cache.containsKey(key)); |
| 946 | |
| 947 | assert (cache.size() <= maxSize); |
| 948 | if (cache.size() == maxSize) { |
| 949 | // Cache is at limit, evict oldest entry. |
| 950 | long oldestTime = Long.MAX_VALUE; |
| 951 | String keyToRemove = null; |
| 952 | for (CacheEntry entry: cache.values()) { |
| 953 | if ((entry.millis < oldestTime) || (keyToRemove == null)) { |
| 954 | keyToRemove = entry.key; |
| 955 | oldestTime = entry.millis; |
| 956 | } |
| 957 | } |
| 958 | /* |
| 959 | System.err.println("put() remove key = " + keyToRemove + |
| 960 | " size " + cache.size()); |
| 961 | */ |
| 962 | assert (keyToRemove != null); |
| 963 | cache.remove(keyToRemove); |
| 964 | /* |
| 965 | System.err.println("put() removed, size " + cache.size()); |
| 966 | */ |
| 967 | } |
| 968 | assert (cache.size() <= maxSize); |
| 969 | CacheEntry entry = new CacheEntry(key, data); |
| 970 | assert (key.equals(entry.key)); |
| 971 | cache.put(key, entry); |
| 972 | /* |
| 973 | System.err.println("put() added key " + key + " " + |
| 974 | " size " + cache.size()); |
| 975 | */ |
| 976 | } |
| 977 | |
| 978 | } |
| 979 | |
| 980 | // ------------------------------------------------------------------------ |
| 981 | // Constructors ----------------------------------------------------------- |
| 982 | // ------------------------------------------------------------------------ |
| 983 | |
| 984 | /** |
| 985 | * Constructor sets up state for getEvent(). |
| 986 | * |
| 987 | * @param listener the object this backend needs to wake up when new |
| 988 | * input comes in |
| 989 | * @param input an InputStream connected to the remote user, or null for |
| 990 | * System.in. If System.in is used, then on non-Windows systems it will |
| 991 | * be put in raw mode; shutdown() will (blindly!) put System.in in cooked |
| 992 | * mode. input is always converted to a Reader with UTF-8 encoding. |
| 993 | * @param output an OutputStream connected to the remote user, or null |
| 994 | * for System.out. output is always converted to a Writer with UTF-8 |
| 995 | * encoding. |
| 996 | * @param windowWidth the number of text columns to start with |
| 997 | * @param windowHeight the number of text rows to start with |
| 998 | * @throws UnsupportedEncodingException if an exception is thrown when |
| 999 | * creating the InputStreamReader |
| 1000 | */ |
| 1001 | public ECMA48Terminal(final Object listener, final InputStream input, |
| 1002 | final OutputStream output, final int windowWidth, |
| 1003 | final int windowHeight) throws UnsupportedEncodingException { |
| 1004 | |
| 1005 | this(listener, input, output); |
| 1006 | |
| 1007 | // Send dtterm/xterm sequences, which will probably not work because |
| 1008 | // allowWindowOps is defaulted to false. |
| 1009 | String resizeString = String.format("\033[8;%d;%dt", windowHeight, |
| 1010 | windowWidth); |
| 1011 | this.output.write(resizeString); |
| 1012 | this.output.flush(); |
| 1013 | } |
| 1014 | |
| 1015 | /** |
| 1016 | * Constructor sets up state for getEvent(). |
| 1017 | * |
| 1018 | * @param listener the object this backend needs to wake up when new |
| 1019 | * input comes in |
| 1020 | * @param input an InputStream connected to the remote user, or null for |
| 1021 | * System.in. If System.in is used, then on non-Windows systems it will |
| 1022 | * be put in raw mode; shutdown() will (blindly!) put System.in in cooked |
| 1023 | * mode. input is always converted to a Reader with UTF-8 encoding. |
| 1024 | * @param output an OutputStream connected to the remote user, or null |
| 1025 | * for System.out. output is always converted to a Writer with UTF-8 |
| 1026 | * encoding. |
| 1027 | * @throws UnsupportedEncodingException if an exception is thrown when |
| 1028 | * creating the InputStreamReader |
| 1029 | */ |
| 1030 | public ECMA48Terminal(final Object listener, final InputStream input, |
| 1031 | final OutputStream output) throws UnsupportedEncodingException { |
| 1032 | |
| 1033 | resetParser(); |
| 1034 | mouse1 = false; |
| 1035 | mouse2 = false; |
| 1036 | mouse3 = false; |
| 1037 | stopReaderThread = false; |
| 1038 | this.listener = listener; |
| 1039 | |
| 1040 | if (input == null) { |
| 1041 | // inputStream = System.in; |
| 1042 | inputStream = new FileInputStream(FileDescriptor.in); |
| 1043 | sttyRaw(); |
| 1044 | setRawMode = true; |
| 1045 | } else { |
| 1046 | inputStream = input; |
| 1047 | } |
| 1048 | this.input = new InputStreamReader(inputStream, "UTF-8"); |
| 1049 | |
| 1050 | if (input instanceof SessionInfo) { |
| 1051 | // This is a TelnetInputStream that exposes window size and |
| 1052 | // environment variables from the telnet layer. |
| 1053 | sessionInfo = (SessionInfo) input; |
| 1054 | } |
| 1055 | if (sessionInfo == null) { |
| 1056 | if (input == null) { |
| 1057 | // Reading right off the tty |
| 1058 | sessionInfo = new TTYSessionInfo(); |
| 1059 | } else { |
| 1060 | sessionInfo = new TSessionInfo(); |
| 1061 | } |
| 1062 | } |
| 1063 | |
| 1064 | if (output == null) { |
| 1065 | this.output = new PrintWriter(new OutputStreamWriter(System.out, |
| 1066 | "UTF-8")); |
| 1067 | } else { |
| 1068 | this.output = new PrintWriter(new OutputStreamWriter(output, |
| 1069 | "UTF-8")); |
| 1070 | } |
| 1071 | |
| 1072 | // Request xterm report window dimensions in pixels |
| 1073 | this.output.printf("%s", xtermReportWindowPixelDimensions()); |
| 1074 | |
| 1075 | // Enable mouse reporting and metaSendsEscape |
| 1076 | this.output.printf("%s%s", mouse(true), xtermMetaSendsEscape(true)); |
| 1077 | this.output.flush(); |
| 1078 | |
| 1079 | // Query the screen size |
| 1080 | sessionInfo.queryWindowSize(); |
| 1081 | setDimensions(sessionInfo.getWindowWidth(), |
| 1082 | sessionInfo.getWindowHeight()); |
| 1083 | |
| 1084 | // Hang onto the window size |
| 1085 | windowResize = new TResizeEvent(TResizeEvent.Type.SCREEN, |
| 1086 | sessionInfo.getWindowWidth(), sessionInfo.getWindowHeight()); |
| 1087 | |
| 1088 | // Permit RGB colors only if externally requested. |
| 1089 | if (System.getProperty("jexer.ECMA48.rgbColor") != null) { |
| 1090 | if (System.getProperty("jexer.ECMA48.rgbColor").equals("true")) { |
| 1091 | doRgbColor = true; |
| 1092 | } else { |
| 1093 | doRgbColor = false; |
| 1094 | } |
| 1095 | } |
| 1096 | |
| 1097 | // Pull the system properties for sixel output. |
| 1098 | if (System.getProperty("jexer.ECMA48.sixel") != null) { |
| 1099 | if (System.getProperty("jexer.ECMA48.sixel").equals("true")) { |
| 1100 | sixel = true; |
| 1101 | } else { |
| 1102 | sixel = false; |
| 1103 | } |
| 1104 | } |
| 1105 | |
| 1106 | // Spin up the input reader |
| 1107 | eventQueue = new LinkedList<TInputEvent>(); |
| 1108 | readerThread = new Thread(this); |
| 1109 | readerThread.start(); |
| 1110 | |
| 1111 | // Clear the screen |
| 1112 | this.output.write(clearAll()); |
| 1113 | this.output.flush(); |
| 1114 | } |
| 1115 | |
| 1116 | /** |
| 1117 | * Constructor sets up state for getEvent(). |
| 1118 | * |
| 1119 | * @param listener the object this backend needs to wake up when new |
| 1120 | * input comes in |
| 1121 | * @param input the InputStream underlying 'reader'. Its available() |
| 1122 | * method is used to determine if reader.read() will block or not. |
| 1123 | * @param reader a Reader connected to the remote user. |
| 1124 | * @param writer a PrintWriter connected to the remote user. |
| 1125 | * @param setRawMode if true, set System.in into raw mode with stty. |
| 1126 | * This should in general not be used. It is here solely for Demo3, |
| 1127 | * which uses System.in. |
| 1128 | * @throws IllegalArgumentException if input, reader, or writer are null. |
| 1129 | */ |
| 1130 | public ECMA48Terminal(final Object listener, final InputStream input, |
| 1131 | final Reader reader, final PrintWriter writer, |
| 1132 | final boolean setRawMode) { |
| 1133 | |
| 1134 | if (input == null) { |
| 1135 | throw new IllegalArgumentException("InputStream must be specified"); |
| 1136 | } |
| 1137 | if (reader == null) { |
| 1138 | throw new IllegalArgumentException("Reader must be specified"); |
| 1139 | } |
| 1140 | if (writer == null) { |
| 1141 | throw new IllegalArgumentException("Writer must be specified"); |
| 1142 | } |
| 1143 | resetParser(); |
| 1144 | mouse1 = false; |
| 1145 | mouse2 = false; |
| 1146 | mouse3 = false; |
| 1147 | stopReaderThread = false; |
| 1148 | this.listener = listener; |
| 1149 | |
| 1150 | inputStream = input; |
| 1151 | this.input = reader; |
| 1152 | |
| 1153 | if (setRawMode == true) { |
| 1154 | sttyRaw(); |
| 1155 | } |
| 1156 | this.setRawMode = setRawMode; |
| 1157 | |
| 1158 | if (input instanceof SessionInfo) { |
| 1159 | // This is a TelnetInputStream that exposes window size and |
| 1160 | // environment variables from the telnet layer. |
| 1161 | sessionInfo = (SessionInfo) input; |
| 1162 | } |
| 1163 | if (sessionInfo == null) { |
| 1164 | if (setRawMode == true) { |
| 1165 | // Reading right off the tty |
| 1166 | sessionInfo = new TTYSessionInfo(); |
| 1167 | } else { |
| 1168 | sessionInfo = new TSessionInfo(); |
| 1169 | } |
| 1170 | } |
| 1171 | |
| 1172 | this.output = writer; |
| 1173 | |
| 1174 | // Request xterm report window dimensions in pixels |
| 1175 | this.output.printf("%s", xtermReportWindowPixelDimensions()); |
| 1176 | |
| 1177 | // Enable mouse reporting and metaSendsEscape |
| 1178 | this.output.printf("%s%s", mouse(true), xtermMetaSendsEscape(true)); |
| 1179 | this.output.flush(); |
| 1180 | |
| 1181 | // Query the screen size |
| 1182 | sessionInfo.queryWindowSize(); |
| 1183 | setDimensions(sessionInfo.getWindowWidth(), |
| 1184 | sessionInfo.getWindowHeight()); |
| 1185 | |
| 1186 | // Hang onto the window size |
| 1187 | windowResize = new TResizeEvent(TResizeEvent.Type.SCREEN, |
| 1188 | sessionInfo.getWindowWidth(), sessionInfo.getWindowHeight()); |
| 1189 | |
| 1190 | // Permit RGB colors only if externally requested |
| 1191 | if (System.getProperty("jexer.ECMA48.rgbColor") != null) { |
| 1192 | if (System.getProperty("jexer.ECMA48.rgbColor").equals("true")) { |
| 1193 | doRgbColor = true; |
| 1194 | } else { |
| 1195 | doRgbColor = false; |
| 1196 | } |
| 1197 | } |
| 1198 | |
| 1199 | // Pull the system properties for sixel output. |
| 1200 | if (System.getProperty("jexer.ECMA48.sixel") != null) { |
| 1201 | if (System.getProperty("jexer.ECMA48.sixel").equals("true")) { |
| 1202 | sixel = true; |
| 1203 | } else { |
| 1204 | sixel = false; |
| 1205 | } |
| 1206 | } |
| 1207 | |
| 1208 | // Spin up the input reader |
| 1209 | eventQueue = new LinkedList<TInputEvent>(); |
| 1210 | readerThread = new Thread(this); |
| 1211 | readerThread.start(); |
| 1212 | |
| 1213 | // Clear the screen |
| 1214 | this.output.write(clearAll()); |
| 1215 | this.output.flush(); |
| 1216 | } |
| 1217 | |
| 1218 | /** |
| 1219 | * Constructor sets up state for getEvent(). |
| 1220 | * |
| 1221 | * @param listener the object this backend needs to wake up when new |
| 1222 | * input comes in |
| 1223 | * @param input the InputStream underlying 'reader'. Its available() |
| 1224 | * method is used to determine if reader.read() will block or not. |
| 1225 | * @param reader a Reader connected to the remote user. |
| 1226 | * @param writer a PrintWriter connected to the remote user. |
| 1227 | * @throws IllegalArgumentException if input, reader, or writer are null. |
| 1228 | */ |
| 1229 | public ECMA48Terminal(final Object listener, final InputStream input, |
| 1230 | final Reader reader, final PrintWriter writer) { |
| 1231 | |
| 1232 | this(listener, input, reader, writer, false); |
| 1233 | } |
| 1234 | |
| 1235 | // ------------------------------------------------------------------------ |
| 1236 | // LogicalScreen ---------------------------------------------------------- |
| 1237 | // ------------------------------------------------------------------------ |
| 1238 | |
| 1239 | /** |
| 1240 | * Set the window title. |
| 1241 | * |
| 1242 | * @param title the new title |
| 1243 | */ |
| 1244 | @Override |
| 1245 | public void setTitle(final String title) { |
| 1246 | output.write(getSetTitleString(title)); |
| 1247 | flush(); |
| 1248 | } |
| 1249 | |
| 1250 | /** |
| 1251 | * Push the logical screen to the physical device. |
| 1252 | */ |
| 1253 | @Override |
| 1254 | public void flushPhysical() { |
| 1255 | StringBuilder sb = new StringBuilder(); |
| 1256 | if ((cursorVisible) |
| 1257 | && (cursorY >= 0) |
| 1258 | && (cursorX >= 0) |
| 1259 | && (cursorY <= height - 1) |
| 1260 | && (cursorX <= width - 1) |
| 1261 | ) { |
| 1262 | flushString(sb); |
| 1263 | sb.append(cursor(true)); |
| 1264 | sb.append(gotoXY(cursorX, cursorY)); |
| 1265 | } else { |
| 1266 | sb.append(cursor(false)); |
| 1267 | flushString(sb); |
| 1268 | } |
| 1269 | output.write(sb.toString()); |
| 1270 | flush(); |
| 1271 | } |
| 1272 | |
| 1273 | // ------------------------------------------------------------------------ |
| 1274 | // TerminalReader --------------------------------------------------------- |
| 1275 | // ------------------------------------------------------------------------ |
| 1276 | |
| 1277 | /** |
| 1278 | * Check if there are events in the queue. |
| 1279 | * |
| 1280 | * @return if true, getEvents() has something to return to the backend |
| 1281 | */ |
| 1282 | public boolean hasEvents() { |
| 1283 | synchronized (eventQueue) { |
| 1284 | return (eventQueue.size() > 0); |
| 1285 | } |
| 1286 | } |
| 1287 | |
| 1288 | /** |
| 1289 | * Return any events in the IO queue. |
| 1290 | * |
| 1291 | * @param queue list to append new events to |
| 1292 | */ |
| 1293 | public void getEvents(final List<TInputEvent> queue) { |
| 1294 | synchronized (eventQueue) { |
| 1295 | if (eventQueue.size() > 0) { |
| 1296 | synchronized (queue) { |
| 1297 | queue.addAll(eventQueue); |
| 1298 | } |
| 1299 | eventQueue.clear(); |
| 1300 | } |
| 1301 | } |
| 1302 | } |
| 1303 | |
| 1304 | /** |
| 1305 | * Restore terminal to normal state. |
| 1306 | */ |
| 1307 | public void closeTerminal() { |
| 1308 | |
| 1309 | // System.err.println("=== shutdown() ==="); System.err.flush(); |
| 1310 | |
| 1311 | // Tell the reader thread to stop looking at input |
| 1312 | stopReaderThread = true; |
| 1313 | try { |
| 1314 | readerThread.join(); |
| 1315 | } catch (InterruptedException e) { |
| 1316 | if (debugToStderr) { |
| 1317 | e.printStackTrace(); |
| 1318 | } |
| 1319 | } |
| 1320 | |
| 1321 | // Disable mouse reporting and show cursor. Defensive null check |
| 1322 | // here in case closeTerminal() is called twice. |
| 1323 | if (output != null) { |
| 1324 | output.printf("%s%s%s", mouse(false), cursor(true), normal()); |
| 1325 | output.flush(); |
| 1326 | } |
| 1327 | |
| 1328 | if (setRawMode) { |
| 1329 | sttyCooked(); |
| 1330 | setRawMode = false; |
| 1331 | // We don't close System.in/out |
| 1332 | } else { |
| 1333 | // Shut down the streams, this should wake up the reader thread |
| 1334 | // and make it exit. |
| 1335 | if (input != null) { |
| 1336 | try { |
| 1337 | input.close(); |
| 1338 | } catch (IOException e) { |
| 1339 | // SQUASH |
| 1340 | } |
| 1341 | input = null; |
| 1342 | } |
| 1343 | if (output != null) { |
| 1344 | output.close(); |
| 1345 | output = null; |
| 1346 | } |
| 1347 | } |
| 1348 | } |
| 1349 | |
| 1350 | /** |
| 1351 | * Set listener to a different Object. |
| 1352 | * |
| 1353 | * @param listener the new listening object that run() wakes up on new |
| 1354 | * input |
| 1355 | */ |
| 1356 | public void setListener(final Object listener) { |
| 1357 | this.listener = listener; |
| 1358 | } |
| 1359 | |
| 1360 | // ------------------------------------------------------------------------ |
| 1361 | // Runnable --------------------------------------------------------------- |
| 1362 | // ------------------------------------------------------------------------ |
| 1363 | |
| 1364 | /** |
| 1365 | * Read function runs on a separate thread. |
| 1366 | */ |
| 1367 | public void run() { |
| 1368 | boolean done = false; |
| 1369 | // available() will often return > 1, so we need to read in chunks to |
| 1370 | // stay caught up. |
| 1371 | char [] readBuffer = new char[128]; |
| 1372 | List<TInputEvent> events = new LinkedList<TInputEvent>(); |
| 1373 | |
| 1374 | while (!done && !stopReaderThread) { |
| 1375 | try { |
| 1376 | // We assume that if inputStream has bytes available, then |
| 1377 | // input won't block on read(). |
| 1378 | int n = inputStream.available(); |
| 1379 | |
| 1380 | /* |
| 1381 | System.err.printf("inputStream.available(): %d\n", n); |
| 1382 | System.err.flush(); |
| 1383 | */ |
| 1384 | |
| 1385 | if (n > 0) { |
| 1386 | if (readBuffer.length < n) { |
| 1387 | // The buffer wasn't big enough, make it huger |
| 1388 | readBuffer = new char[readBuffer.length * 2]; |
| 1389 | } |
| 1390 | |
| 1391 | // System.err.printf("BEFORE read()\n"); System.err.flush(); |
| 1392 | |
| 1393 | int rc = input.read(readBuffer, 0, readBuffer.length); |
| 1394 | |
| 1395 | /* |
| 1396 | System.err.printf("AFTER read() %d\n", rc); |
| 1397 | System.err.flush(); |
| 1398 | */ |
| 1399 | |
| 1400 | if (rc == -1) { |
| 1401 | // This is EOF |
| 1402 | done = true; |
| 1403 | } else { |
| 1404 | for (int i = 0; i < rc; i++) { |
| 1405 | int ch = readBuffer[i]; |
| 1406 | processChar(events, (char)ch); |
| 1407 | } |
| 1408 | getIdleEvents(events); |
| 1409 | if (events.size() > 0) { |
| 1410 | // Add to the queue for the backend thread to |
| 1411 | // be able to obtain. |
| 1412 | synchronized (eventQueue) { |
| 1413 | eventQueue.addAll(events); |
| 1414 | } |
| 1415 | if (listener != null) { |
| 1416 | synchronized (listener) { |
| 1417 | listener.notifyAll(); |
| 1418 | } |
| 1419 | } |
| 1420 | events.clear(); |
| 1421 | } |
| 1422 | } |
| 1423 | } else { |
| 1424 | getIdleEvents(events); |
| 1425 | if (events.size() > 0) { |
| 1426 | synchronized (eventQueue) { |
| 1427 | eventQueue.addAll(events); |
| 1428 | } |
| 1429 | if (listener != null) { |
| 1430 | synchronized (listener) { |
| 1431 | listener.notifyAll(); |
| 1432 | } |
| 1433 | } |
| 1434 | events.clear(); |
| 1435 | } |
| 1436 | |
| 1437 | // Wait 20 millis for more data |
| 1438 | Thread.sleep(20); |
| 1439 | } |
| 1440 | // System.err.println("end while loop"); System.err.flush(); |
| 1441 | } catch (InterruptedException e) { |
| 1442 | // SQUASH |
| 1443 | } catch (IOException e) { |
| 1444 | e.printStackTrace(); |
| 1445 | done = true; |
| 1446 | } |
| 1447 | } // while ((done == false) && (stopReaderThread == false)) |
| 1448 | // System.err.println("*** run() exiting..."); System.err.flush(); |
| 1449 | } |
| 1450 | |
| 1451 | // ------------------------------------------------------------------------ |
| 1452 | // ECMA48Terminal --------------------------------------------------------- |
| 1453 | // ------------------------------------------------------------------------ |
| 1454 | |
| 1455 | /** |
| 1456 | * Get the width of a character cell in pixels. |
| 1457 | * |
| 1458 | * @return the width in pixels of a character cell |
| 1459 | */ |
| 1460 | public int getTextWidth() { |
| 1461 | return (widthPixels / sessionInfo.getWindowWidth()); |
| 1462 | } |
| 1463 | |
| 1464 | /** |
| 1465 | * Get the height of a character cell in pixels. |
| 1466 | * |
| 1467 | * @return the height in pixels of a character cell |
| 1468 | */ |
| 1469 | public int getTextHeight() { |
| 1470 | return (heightPixels / sessionInfo.getWindowHeight()); |
| 1471 | } |
| 1472 | |
| 1473 | /** |
| 1474 | * Getter for sessionInfo. |
| 1475 | * |
| 1476 | * @return the SessionInfo |
| 1477 | */ |
| 1478 | public SessionInfo getSessionInfo() { |
| 1479 | return sessionInfo; |
| 1480 | } |
| 1481 | |
| 1482 | /** |
| 1483 | * Get the output writer. |
| 1484 | * |
| 1485 | * @return the Writer |
| 1486 | */ |
| 1487 | public PrintWriter getOutput() { |
| 1488 | return output; |
| 1489 | } |
| 1490 | |
| 1491 | /** |
| 1492 | * Call 'stty' to set cooked mode. |
| 1493 | * |
| 1494 | * <p>Actually executes '/bin/sh -c stty sane cooked < /dev/tty' |
| 1495 | */ |
| 1496 | private void sttyCooked() { |
| 1497 | doStty(false); |
| 1498 | } |
| 1499 | |
| 1500 | /** |
| 1501 | * Call 'stty' to set raw mode. |
| 1502 | * |
| 1503 | * <p>Actually executes '/bin/sh -c stty -ignbrk -brkint -parmrk -istrip |
| 1504 | * -inlcr -igncr -icrnl -ixon -opost -echo -echonl -icanon -isig -iexten |
| 1505 | * -parenb cs8 min 1 < /dev/tty' |
| 1506 | */ |
| 1507 | private void sttyRaw() { |
| 1508 | doStty(true); |
| 1509 | } |
| 1510 | |
| 1511 | /** |
| 1512 | * Call 'stty' to set raw or cooked mode. |
| 1513 | * |
| 1514 | * @param mode if true, set raw mode, otherwise set cooked mode |
| 1515 | */ |
| 1516 | private void doStty(final boolean mode) { |
| 1517 | String [] cmdRaw = { |
| 1518 | "/bin/sh", "-c", "stty -ignbrk -brkint -parmrk -istrip -inlcr -igncr -icrnl -ixon -opost -echo -echonl -icanon -isig -iexten -parenb cs8 min 1 < /dev/tty" |
| 1519 | }; |
| 1520 | String [] cmdCooked = { |
| 1521 | "/bin/sh", "-c", "stty sane cooked < /dev/tty" |
| 1522 | }; |
| 1523 | try { |
| 1524 | Process process; |
| 1525 | if (mode) { |
| 1526 | process = Runtime.getRuntime().exec(cmdRaw); |
| 1527 | } else { |
| 1528 | process = Runtime.getRuntime().exec(cmdCooked); |
| 1529 | } |
| 1530 | BufferedReader in = new BufferedReader(new InputStreamReader(process.getInputStream(), "UTF-8")); |
| 1531 | String line = in.readLine(); |
| 1532 | if ((line != null) && (line.length() > 0)) { |
| 1533 | System.err.println("WEIRD?! Normal output from stty: " + line); |
| 1534 | } |
| 1535 | while (true) { |
| 1536 | BufferedReader err = new BufferedReader(new InputStreamReader(process.getErrorStream(), "UTF-8")); |
| 1537 | line = err.readLine(); |
| 1538 | if ((line != null) && (line.length() > 0)) { |
| 1539 | System.err.println("Error output from stty: " + line); |
| 1540 | } |
| 1541 | try { |
| 1542 | process.waitFor(); |
| 1543 | break; |
| 1544 | } catch (InterruptedException e) { |
| 1545 | if (debugToStderr) { |
| 1546 | e.printStackTrace(); |
| 1547 | } |
| 1548 | } |
| 1549 | } |
| 1550 | int rc = process.exitValue(); |
| 1551 | if (rc != 0) { |
| 1552 | System.err.println("stty returned error code: " + rc); |
| 1553 | } |
| 1554 | } catch (IOException e) { |
| 1555 | e.printStackTrace(); |
| 1556 | } |
| 1557 | } |
| 1558 | |
| 1559 | /** |
| 1560 | * Flush output. |
| 1561 | */ |
| 1562 | public void flush() { |
| 1563 | output.flush(); |
| 1564 | } |
| 1565 | |
| 1566 | /** |
| 1567 | * Perform a somewhat-optimal rendering of a line. |
| 1568 | * |
| 1569 | * @param y row coordinate. 0 is the top-most row. |
| 1570 | * @param sb StringBuilder to write escape sequences to |
| 1571 | * @param lastAttr cell attributes from the last call to flushLine |
| 1572 | */ |
| 1573 | private void flushLine(final int y, final StringBuilder sb, |
| 1574 | CellAttributes lastAttr) { |
| 1575 | |
| 1576 | int lastX = -1; |
| 1577 | int textEnd = 0; |
| 1578 | for (int x = 0; x < width; x++) { |
| 1579 | Cell lCell = logical[x][y]; |
| 1580 | if (!lCell.isBlank()) { |
| 1581 | textEnd = x; |
| 1582 | } |
| 1583 | } |
| 1584 | // Push textEnd to first column beyond the text area |
| 1585 | textEnd++; |
| 1586 | |
| 1587 | // DEBUG |
| 1588 | // reallyCleared = true; |
| 1589 | |
| 1590 | boolean hasImage = false; |
| 1591 | |
| 1592 | for (int x = 0; x < width; x++) { |
| 1593 | Cell lCell = logical[x][y]; |
| 1594 | Cell pCell = physical[x][y]; |
| 1595 | |
| 1596 | if (!lCell.equals(pCell) || reallyCleared) { |
| 1597 | |
| 1598 | if (debugToStderr) { |
| 1599 | System.err.printf("\n--\n"); |
| 1600 | System.err.printf(" Y: %d X: %d\n", y, x); |
| 1601 | System.err.printf(" lCell: %s\n", lCell); |
| 1602 | System.err.printf(" pCell: %s\n", pCell); |
| 1603 | System.err.printf(" ==== \n"); |
| 1604 | } |
| 1605 | |
| 1606 | if (lastAttr == null) { |
| 1607 | lastAttr = new CellAttributes(); |
| 1608 | sb.append(normal()); |
| 1609 | } |
| 1610 | |
| 1611 | // Place the cell |
| 1612 | if ((lastX != (x - 1)) || (lastX == -1)) { |
| 1613 | // Advancing at least one cell, or the first gotoXY |
| 1614 | sb.append(gotoXY(x, y)); |
| 1615 | } |
| 1616 | |
| 1617 | assert (lastAttr != null); |
| 1618 | |
| 1619 | if ((x == textEnd) && (textEnd < width - 1)) { |
| 1620 | assert (lCell.isBlank()); |
| 1621 | |
| 1622 | for (int i = x; i < width; i++) { |
| 1623 | assert (logical[i][y].isBlank()); |
| 1624 | // Physical is always updated |
| 1625 | physical[i][y].reset(); |
| 1626 | } |
| 1627 | |
| 1628 | // Clear remaining line |
| 1629 | sb.append(clearRemainingLine()); |
| 1630 | lastAttr.reset(); |
| 1631 | return; |
| 1632 | } |
| 1633 | |
| 1634 | // Image cell: bypass the rest of the loop, it is not |
| 1635 | // rendered here. |
| 1636 | if (lCell.isImage()) { |
| 1637 | hasImage = true; |
| 1638 | |
| 1639 | // Save the last rendered cell |
| 1640 | lastX = x; |
| 1641 | |
| 1642 | // Physical is always updated |
| 1643 | physical[x][y].setTo(lCell); |
| 1644 | continue; |
| 1645 | } |
| 1646 | |
| 1647 | assert (!lCell.isImage()); |
| 1648 | if (hasImage) { |
| 1649 | hasImage = false; |
| 1650 | sb.append(gotoXY(x, y)); |
| 1651 | } |
| 1652 | |
| 1653 | // Now emit only the modified attributes |
| 1654 | if ((lCell.getForeColor() != lastAttr.getForeColor()) |
| 1655 | && (lCell.getBackColor() != lastAttr.getBackColor()) |
| 1656 | && (!lCell.isRGB()) |
| 1657 | && (lCell.isBold() == lastAttr.isBold()) |
| 1658 | && (lCell.isReverse() == lastAttr.isReverse()) |
| 1659 | && (lCell.isUnderline() == lastAttr.isUnderline()) |
| 1660 | && (lCell.isBlink() == lastAttr.isBlink()) |
| 1661 | ) { |
| 1662 | // Both colors changed, attributes the same |
| 1663 | sb.append(color(lCell.isBold(), |
| 1664 | lCell.getForeColor(), lCell.getBackColor())); |
| 1665 | |
| 1666 | if (debugToStderr) { |
| 1667 | System.err.printf("1 Change only fore/back colors\n"); |
| 1668 | } |
| 1669 | |
| 1670 | } else if (lCell.isRGB() |
| 1671 | && (lCell.getForeColorRGB() != lastAttr.getForeColorRGB()) |
| 1672 | && (lCell.getBackColorRGB() != lastAttr.getBackColorRGB()) |
| 1673 | && (lCell.isBold() == lastAttr.isBold()) |
| 1674 | && (lCell.isReverse() == lastAttr.isReverse()) |
| 1675 | && (lCell.isUnderline() == lastAttr.isUnderline()) |
| 1676 | && (lCell.isBlink() == lastAttr.isBlink()) |
| 1677 | ) { |
| 1678 | // Both colors changed, attributes the same |
| 1679 | sb.append(colorRGB(lCell.getForeColorRGB(), |
| 1680 | lCell.getBackColorRGB())); |
| 1681 | |
| 1682 | if (debugToStderr) { |
| 1683 | System.err.printf("1 Change only fore/back colors (RGB)\n"); |
| 1684 | } |
| 1685 | } else if ((lCell.getForeColor() != lastAttr.getForeColor()) |
| 1686 | && (lCell.getBackColor() != lastAttr.getBackColor()) |
| 1687 | && (!lCell.isRGB()) |
| 1688 | && (lCell.isBold() != lastAttr.isBold()) |
| 1689 | && (lCell.isReverse() != lastAttr.isReverse()) |
| 1690 | && (lCell.isUnderline() != lastAttr.isUnderline()) |
| 1691 | && (lCell.isBlink() != lastAttr.isBlink()) |
| 1692 | ) { |
| 1693 | // Everything is different |
| 1694 | sb.append(color(lCell.getForeColor(), |
| 1695 | lCell.getBackColor(), |
| 1696 | lCell.isBold(), lCell.isReverse(), |
| 1697 | lCell.isBlink(), |
| 1698 | lCell.isUnderline())); |
| 1699 | |
| 1700 | if (debugToStderr) { |
| 1701 | System.err.printf("2 Set all attributes\n"); |
| 1702 | } |
| 1703 | } else if ((lCell.getForeColor() != lastAttr.getForeColor()) |
| 1704 | && (lCell.getBackColor() == lastAttr.getBackColor()) |
| 1705 | && (!lCell.isRGB()) |
| 1706 | && (lCell.isBold() == lastAttr.isBold()) |
| 1707 | && (lCell.isReverse() == lastAttr.isReverse()) |
| 1708 | && (lCell.isUnderline() == lastAttr.isUnderline()) |
| 1709 | && (lCell.isBlink() == lastAttr.isBlink()) |
| 1710 | ) { |
| 1711 | |
| 1712 | // Attributes same, foreColor different |
| 1713 | sb.append(color(lCell.isBold(), |
| 1714 | lCell.getForeColor(), true)); |
| 1715 | |
| 1716 | if (debugToStderr) { |
| 1717 | System.err.printf("3 Change foreColor\n"); |
| 1718 | } |
| 1719 | } else if (lCell.isRGB() |
| 1720 | && (lCell.getForeColorRGB() != lastAttr.getForeColorRGB()) |
| 1721 | && (lCell.getBackColorRGB() == lastAttr.getBackColorRGB()) |
| 1722 | && (lCell.getForeColorRGB() >= 0) |
| 1723 | && (lCell.getBackColorRGB() >= 0) |
| 1724 | && (lCell.isBold() == lastAttr.isBold()) |
| 1725 | && (lCell.isReverse() == lastAttr.isReverse()) |
| 1726 | && (lCell.isUnderline() == lastAttr.isUnderline()) |
| 1727 | && (lCell.isBlink() == lastAttr.isBlink()) |
| 1728 | ) { |
| 1729 | // Attributes same, foreColor different |
| 1730 | sb.append(colorRGB(lCell.getForeColorRGB(), true)); |
| 1731 | |
| 1732 | if (debugToStderr) { |
| 1733 | System.err.printf("3 Change foreColor (RGB)\n"); |
| 1734 | } |
| 1735 | } else if ((lCell.getForeColor() == lastAttr.getForeColor()) |
| 1736 | && (lCell.getBackColor() != lastAttr.getBackColor()) |
| 1737 | && (!lCell.isRGB()) |
| 1738 | && (lCell.isBold() == lastAttr.isBold()) |
| 1739 | && (lCell.isReverse() == lastAttr.isReverse()) |
| 1740 | && (lCell.isUnderline() == lastAttr.isUnderline()) |
| 1741 | && (lCell.isBlink() == lastAttr.isBlink()) |
| 1742 | ) { |
| 1743 | // Attributes same, backColor different |
| 1744 | sb.append(color(lCell.isBold(), |
| 1745 | lCell.getBackColor(), false)); |
| 1746 | |
| 1747 | if (debugToStderr) { |
| 1748 | System.err.printf("4 Change backColor\n"); |
| 1749 | } |
| 1750 | } else if (lCell.isRGB() |
| 1751 | && (lCell.getForeColorRGB() == lastAttr.getForeColorRGB()) |
| 1752 | && (lCell.getBackColorRGB() != lastAttr.getBackColorRGB()) |
| 1753 | && (lCell.isBold() == lastAttr.isBold()) |
| 1754 | && (lCell.isReverse() == lastAttr.isReverse()) |
| 1755 | && (lCell.isUnderline() == lastAttr.isUnderline()) |
| 1756 | && (lCell.isBlink() == lastAttr.isBlink()) |
| 1757 | ) { |
| 1758 | // Attributes same, foreColor different |
| 1759 | sb.append(colorRGB(lCell.getBackColorRGB(), false)); |
| 1760 | |
| 1761 | if (debugToStderr) { |
| 1762 | System.err.printf("4 Change backColor (RGB)\n"); |
| 1763 | } |
| 1764 | } else if ((lCell.getForeColor() == lastAttr.getForeColor()) |
| 1765 | && (lCell.getBackColor() == lastAttr.getBackColor()) |
| 1766 | && (lCell.getForeColorRGB() == lastAttr.getForeColorRGB()) |
| 1767 | && (lCell.getBackColorRGB() == lastAttr.getBackColorRGB()) |
| 1768 | && (lCell.isBold() == lastAttr.isBold()) |
| 1769 | && (lCell.isReverse() == lastAttr.isReverse()) |
| 1770 | && (lCell.isUnderline() == lastAttr.isUnderline()) |
| 1771 | && (lCell.isBlink() == lastAttr.isBlink()) |
| 1772 | ) { |
| 1773 | |
| 1774 | // All attributes the same, just print the char |
| 1775 | // NOP |
| 1776 | |
| 1777 | if (debugToStderr) { |
| 1778 | System.err.printf("5 Only emit character\n"); |
| 1779 | } |
| 1780 | } else { |
| 1781 | // Just reset everything again |
| 1782 | if (!lCell.isRGB()) { |
| 1783 | sb.append(color(lCell.getForeColor(), |
| 1784 | lCell.getBackColor(), |
| 1785 | lCell.isBold(), |
| 1786 | lCell.isReverse(), |
| 1787 | lCell.isBlink(), |
| 1788 | lCell.isUnderline())); |
| 1789 | |
| 1790 | if (debugToStderr) { |
| 1791 | System.err.printf("6 Change all attributes\n"); |
| 1792 | } |
| 1793 | } else { |
| 1794 | sb.append(colorRGB(lCell.getForeColorRGB(), |
| 1795 | lCell.getBackColorRGB(), |
| 1796 | lCell.isBold(), |
| 1797 | lCell.isReverse(), |
| 1798 | lCell.isBlink(), |
| 1799 | lCell.isUnderline())); |
| 1800 | if (debugToStderr) { |
| 1801 | System.err.printf("6 Change all attributes (RGB)\n"); |
| 1802 | } |
| 1803 | } |
| 1804 | |
| 1805 | } |
| 1806 | // Emit the character |
| 1807 | sb.append(lCell.getChar()); |
| 1808 | |
| 1809 | // Save the last rendered cell |
| 1810 | lastX = x; |
| 1811 | lastAttr.setTo(lCell); |
| 1812 | |
| 1813 | // Physical is always updated |
| 1814 | physical[x][y].setTo(lCell); |
| 1815 | |
| 1816 | } // if (!lCell.equals(pCell) || (reallyCleared == true)) |
| 1817 | |
| 1818 | } // for (int x = 0; x < width; x++) |
| 1819 | } |
| 1820 | |
| 1821 | /** |
| 1822 | * Render the screen to a string that can be emitted to something that |
| 1823 | * knows how to process ECMA-48/ANSI X3.64 escape sequences. |
| 1824 | * |
| 1825 | * @param sb StringBuilder to write escape sequences to |
| 1826 | * @return escape sequences string that provides the updates to the |
| 1827 | * physical screen |
| 1828 | */ |
| 1829 | private String flushString(final StringBuilder sb) { |
| 1830 | CellAttributes attr = null; |
| 1831 | |
| 1832 | if (reallyCleared) { |
| 1833 | attr = new CellAttributes(); |
| 1834 | sb.append(clearAll()); |
| 1835 | } |
| 1836 | |
| 1837 | /* |
| 1838 | * For sixel support, draw all of the sixel output first, and then |
| 1839 | * draw everything else afterwards. This works OK, but performance |
| 1840 | * is still a drag on larger pictures. |
| 1841 | */ |
| 1842 | for (int y = 0; y < height; y++) { |
| 1843 | for (int x = 0; x < width; x++) { |
| 1844 | // If physical had non-image data that is now image data, the |
| 1845 | // entire row must be redrawn. |
| 1846 | Cell lCell = logical[x][y]; |
| 1847 | Cell pCell = physical[x][y]; |
| 1848 | if (lCell.isImage() && !pCell.isImage()) { |
| 1849 | unsetImageRow(y); |
| 1850 | break; |
| 1851 | } |
| 1852 | } |
| 1853 | } |
| 1854 | for (int y = 0; y < height; y++) { |
| 1855 | for (int x = 0; x < width; x++) { |
| 1856 | Cell lCell = logical[x][y]; |
| 1857 | Cell pCell = physical[x][y]; |
| 1858 | |
| 1859 | if (!lCell.isImage()) { |
| 1860 | continue; |
| 1861 | } |
| 1862 | |
| 1863 | int left = x; |
| 1864 | int right = x; |
| 1865 | while ((right < width) |
| 1866 | && (logical[right][y].isImage()) |
| 1867 | && (!logical[right][y].equals(physical[right][y]) |
| 1868 | || reallyCleared) |
| 1869 | ) { |
| 1870 | right++; |
| 1871 | } |
| 1872 | ArrayList<Cell> cellsToDraw = new ArrayList<Cell>(); |
| 1873 | for (int i = 0; i < (right - x); i++) { |
| 1874 | assert (logical[x + i][y].isImage()); |
| 1875 | cellsToDraw.add(logical[x + i][y]); |
| 1876 | |
| 1877 | // Physical is always updated. |
| 1878 | physical[x + i][y].setTo(lCell); |
| 1879 | } |
| 1880 | if (cellsToDraw.size() > 0) { |
| 1881 | sb.append(toSixel(x, y, cellsToDraw)); |
| 1882 | } |
| 1883 | |
| 1884 | x = right; |
| 1885 | } |
| 1886 | } |
| 1887 | |
| 1888 | // Draw the text part now. |
| 1889 | for (int y = 0; y < height; y++) { |
| 1890 | flushLine(y, sb, attr); |
| 1891 | } |
| 1892 | |
| 1893 | reallyCleared = false; |
| 1894 | |
| 1895 | String result = sb.toString(); |
| 1896 | if (debugToStderr) { |
| 1897 | System.err.printf("flushString(): %s\n", result); |
| 1898 | } |
| 1899 | return result; |
| 1900 | } |
| 1901 | |
| 1902 | /** |
| 1903 | * Reset keyboard/mouse input parser. |
| 1904 | */ |
| 1905 | private void resetParser() { |
| 1906 | state = ParseState.GROUND; |
| 1907 | params = new ArrayList<String>(); |
| 1908 | params.clear(); |
| 1909 | params.add(""); |
| 1910 | } |
| 1911 | |
| 1912 | /** |
| 1913 | * Produce a control character or one of the special ones (ENTER, TAB, |
| 1914 | * etc.). |
| 1915 | * |
| 1916 | * @param ch Unicode code point |
| 1917 | * @param alt if true, set alt on the TKeypress |
| 1918 | * @return one TKeypress event, either a control character (e.g. isKey == |
| 1919 | * false, ch == 'A', ctrl == true), or a special key (e.g. isKey == true, |
| 1920 | * fnKey == ESC) |
| 1921 | */ |
| 1922 | private TKeypressEvent controlChar(final char ch, final boolean alt) { |
| 1923 | // System.err.printf("controlChar: %02x\n", ch); |
| 1924 | |
| 1925 | switch (ch) { |
| 1926 | case 0x0D: |
| 1927 | // Carriage return --> ENTER |
| 1928 | return new TKeypressEvent(kbEnter, alt, false, false); |
| 1929 | case 0x0A: |
| 1930 | // Linefeed --> ENTER |
| 1931 | return new TKeypressEvent(kbEnter, alt, false, false); |
| 1932 | case 0x1B: |
| 1933 | // ESC |
| 1934 | return new TKeypressEvent(kbEsc, alt, false, false); |
| 1935 | case '\t': |
| 1936 | // TAB |
| 1937 | return new TKeypressEvent(kbTab, alt, false, false); |
| 1938 | default: |
| 1939 | // Make all other control characters come back as the alphabetic |
| 1940 | // character with the ctrl field set. So SOH would be 'A' + |
| 1941 | // ctrl. |
| 1942 | return new TKeypressEvent(false, 0, (char)(ch + 0x40), |
| 1943 | alt, true, false); |
| 1944 | } |
| 1945 | } |
| 1946 | |
| 1947 | /** |
| 1948 | * Produce special key from CSI Pn ; Pm ; ... ~ |
| 1949 | * |
| 1950 | * @return one KEYPRESS event representing a special key |
| 1951 | */ |
| 1952 | private TInputEvent csiFnKey() { |
| 1953 | int key = 0; |
| 1954 | if (params.size() > 0) { |
| 1955 | key = Integer.parseInt(params.get(0)); |
| 1956 | } |
| 1957 | boolean alt = false; |
| 1958 | boolean ctrl = false; |
| 1959 | boolean shift = false; |
| 1960 | if (params.size() > 1) { |
| 1961 | shift = csiIsShift(params.get(1)); |
| 1962 | alt = csiIsAlt(params.get(1)); |
| 1963 | ctrl = csiIsCtrl(params.get(1)); |
| 1964 | } |
| 1965 | |
| 1966 | switch (key) { |
| 1967 | case 1: |
| 1968 | return new TKeypressEvent(kbHome, alt, ctrl, shift); |
| 1969 | case 2: |
| 1970 | return new TKeypressEvent(kbIns, alt, ctrl, shift); |
| 1971 | case 3: |
| 1972 | return new TKeypressEvent(kbDel, alt, ctrl, shift); |
| 1973 | case 4: |
| 1974 | return new TKeypressEvent(kbEnd, alt, ctrl, shift); |
| 1975 | case 5: |
| 1976 | return new TKeypressEvent(kbPgUp, alt, ctrl, shift); |
| 1977 | case 6: |
| 1978 | return new TKeypressEvent(kbPgDn, alt, ctrl, shift); |
| 1979 | case 15: |
| 1980 | return new TKeypressEvent(kbF5, alt, ctrl, shift); |
| 1981 | case 17: |
| 1982 | return new TKeypressEvent(kbF6, alt, ctrl, shift); |
| 1983 | case 18: |
| 1984 | return new TKeypressEvent(kbF7, alt, ctrl, shift); |
| 1985 | case 19: |
| 1986 | return new TKeypressEvent(kbF8, alt, ctrl, shift); |
| 1987 | case 20: |
| 1988 | return new TKeypressEvent(kbF9, alt, ctrl, shift); |
| 1989 | case 21: |
| 1990 | return new TKeypressEvent(kbF10, alt, ctrl, shift); |
| 1991 | case 23: |
| 1992 | return new TKeypressEvent(kbF11, alt, ctrl, shift); |
| 1993 | case 24: |
| 1994 | return new TKeypressEvent(kbF12, alt, ctrl, shift); |
| 1995 | default: |
| 1996 | // Unknown |
| 1997 | return null; |
| 1998 | } |
| 1999 | } |
| 2000 | |
| 2001 | /** |
| 2002 | * Produce mouse events based on "Any event tracking" and UTF-8 |
| 2003 | * coordinates. See |
| 2004 | * http://invisible-island.net/xterm/ctlseqs/ctlseqs.html#Mouse%20Tracking |
| 2005 | * |
| 2006 | * @return a MOUSE_MOTION, MOUSE_UP, or MOUSE_DOWN event |
| 2007 | */ |
| 2008 | private TInputEvent parseMouse() { |
| 2009 | int buttons = params.get(0).charAt(0) - 32; |
| 2010 | int x = params.get(0).charAt(1) - 32 - 1; |
| 2011 | int y = params.get(0).charAt(2) - 32 - 1; |
| 2012 | |
| 2013 | // Clamp X and Y to the physical screen coordinates. |
| 2014 | if (x >= windowResize.getWidth()) { |
| 2015 | x = windowResize.getWidth() - 1; |
| 2016 | } |
| 2017 | if (y >= windowResize.getHeight()) { |
| 2018 | y = windowResize.getHeight() - 1; |
| 2019 | } |
| 2020 | |
| 2021 | TMouseEvent.Type eventType = TMouseEvent.Type.MOUSE_DOWN; |
| 2022 | boolean eventMouse1 = false; |
| 2023 | boolean eventMouse2 = false; |
| 2024 | boolean eventMouse3 = false; |
| 2025 | boolean eventMouseWheelUp = false; |
| 2026 | boolean eventMouseWheelDown = false; |
| 2027 | |
| 2028 | // System.err.printf("buttons: %04x\r\n", buttons); |
| 2029 | |
| 2030 | switch (buttons) { |
| 2031 | case 0: |
| 2032 | eventMouse1 = true; |
| 2033 | mouse1 = true; |
| 2034 | break; |
| 2035 | case 1: |
| 2036 | eventMouse2 = true; |
| 2037 | mouse2 = true; |
| 2038 | break; |
| 2039 | case 2: |
| 2040 | eventMouse3 = true; |
| 2041 | mouse3 = true; |
| 2042 | break; |
| 2043 | case 3: |
| 2044 | // Release or Move |
| 2045 | if (!mouse1 && !mouse2 && !mouse3) { |
| 2046 | eventType = TMouseEvent.Type.MOUSE_MOTION; |
| 2047 | } else { |
| 2048 | eventType = TMouseEvent.Type.MOUSE_UP; |
| 2049 | } |
| 2050 | if (mouse1) { |
| 2051 | mouse1 = false; |
| 2052 | eventMouse1 = true; |
| 2053 | } |
| 2054 | if (mouse2) { |
| 2055 | mouse2 = false; |
| 2056 | eventMouse2 = true; |
| 2057 | } |
| 2058 | if (mouse3) { |
| 2059 | mouse3 = false; |
| 2060 | eventMouse3 = true; |
| 2061 | } |
| 2062 | break; |
| 2063 | |
| 2064 | case 32: |
| 2065 | // Dragging with mouse1 down |
| 2066 | eventMouse1 = true; |
| 2067 | mouse1 = true; |
| 2068 | eventType = TMouseEvent.Type.MOUSE_MOTION; |
| 2069 | break; |
| 2070 | |
| 2071 | case 33: |
| 2072 | // Dragging with mouse2 down |
| 2073 | eventMouse2 = true; |
| 2074 | mouse2 = true; |
| 2075 | eventType = TMouseEvent.Type.MOUSE_MOTION; |
| 2076 | break; |
| 2077 | |
| 2078 | case 34: |
| 2079 | // Dragging with mouse3 down |
| 2080 | eventMouse3 = true; |
| 2081 | mouse3 = true; |
| 2082 | eventType = TMouseEvent.Type.MOUSE_MOTION; |
| 2083 | break; |
| 2084 | |
| 2085 | case 96: |
| 2086 | // Dragging with mouse2 down after wheelUp |
| 2087 | eventMouse2 = true; |
| 2088 | mouse2 = true; |
| 2089 | eventType = TMouseEvent.Type.MOUSE_MOTION; |
| 2090 | break; |
| 2091 | |
| 2092 | case 97: |
| 2093 | // Dragging with mouse2 down after wheelDown |
| 2094 | eventMouse2 = true; |
| 2095 | mouse2 = true; |
| 2096 | eventType = TMouseEvent.Type.MOUSE_MOTION; |
| 2097 | break; |
| 2098 | |
| 2099 | case 64: |
| 2100 | eventMouseWheelUp = true; |
| 2101 | break; |
| 2102 | |
| 2103 | case 65: |
| 2104 | eventMouseWheelDown = true; |
| 2105 | break; |
| 2106 | |
| 2107 | default: |
| 2108 | // Unknown, just make it motion |
| 2109 | eventType = TMouseEvent.Type.MOUSE_MOTION; |
| 2110 | break; |
| 2111 | } |
| 2112 | return new TMouseEvent(eventType, x, y, x, y, |
| 2113 | eventMouse1, eventMouse2, eventMouse3, |
| 2114 | eventMouseWheelUp, eventMouseWheelDown); |
| 2115 | } |
| 2116 | |
| 2117 | /** |
| 2118 | * Produce mouse events based on "Any event tracking" and SGR |
| 2119 | * coordinates. See |
| 2120 | * http://invisible-island.net/xterm/ctlseqs/ctlseqs.html#Mouse%20Tracking |
| 2121 | * |
| 2122 | * @param release if true, this was a release ('m') |
| 2123 | * @return a MOUSE_MOTION, MOUSE_UP, or MOUSE_DOWN event |
| 2124 | */ |
| 2125 | private TInputEvent parseMouseSGR(final boolean release) { |
| 2126 | // SGR extended coordinates - mode 1006 |
| 2127 | if (params.size() < 3) { |
| 2128 | // Invalid position, bail out. |
| 2129 | return null; |
| 2130 | } |
| 2131 | int buttons = Integer.parseInt(params.get(0)); |
| 2132 | int x = Integer.parseInt(params.get(1)) - 1; |
| 2133 | int y = Integer.parseInt(params.get(2)) - 1; |
| 2134 | |
| 2135 | // Clamp X and Y to the physical screen coordinates. |
| 2136 | if (x >= windowResize.getWidth()) { |
| 2137 | x = windowResize.getWidth() - 1; |
| 2138 | } |
| 2139 | if (y >= windowResize.getHeight()) { |
| 2140 | y = windowResize.getHeight() - 1; |
| 2141 | } |
| 2142 | |
| 2143 | TMouseEvent.Type eventType = TMouseEvent.Type.MOUSE_DOWN; |
| 2144 | boolean eventMouse1 = false; |
| 2145 | boolean eventMouse2 = false; |
| 2146 | boolean eventMouse3 = false; |
| 2147 | boolean eventMouseWheelUp = false; |
| 2148 | boolean eventMouseWheelDown = false; |
| 2149 | |
| 2150 | if (release) { |
| 2151 | eventType = TMouseEvent.Type.MOUSE_UP; |
| 2152 | } |
| 2153 | |
| 2154 | switch (buttons) { |
| 2155 | case 0: |
| 2156 | eventMouse1 = true; |
| 2157 | break; |
| 2158 | case 1: |
| 2159 | eventMouse2 = true; |
| 2160 | break; |
| 2161 | case 2: |
| 2162 | eventMouse3 = true; |
| 2163 | break; |
| 2164 | case 35: |
| 2165 | // Motion only, no buttons down |
| 2166 | eventType = TMouseEvent.Type.MOUSE_MOTION; |
| 2167 | break; |
| 2168 | |
| 2169 | case 32: |
| 2170 | // Dragging with mouse1 down |
| 2171 | eventMouse1 = true; |
| 2172 | eventType = TMouseEvent.Type.MOUSE_MOTION; |
| 2173 | break; |
| 2174 | |
| 2175 | case 33: |
| 2176 | // Dragging with mouse2 down |
| 2177 | eventMouse2 = true; |
| 2178 | eventType = TMouseEvent.Type.MOUSE_MOTION; |
| 2179 | break; |
| 2180 | |
| 2181 | case 34: |
| 2182 | // Dragging with mouse3 down |
| 2183 | eventMouse3 = true; |
| 2184 | eventType = TMouseEvent.Type.MOUSE_MOTION; |
| 2185 | break; |
| 2186 | |
| 2187 | case 96: |
| 2188 | // Dragging with mouse2 down after wheelUp |
| 2189 | eventMouse2 = true; |
| 2190 | eventType = TMouseEvent.Type.MOUSE_MOTION; |
| 2191 | break; |
| 2192 | |
| 2193 | case 97: |
| 2194 | // Dragging with mouse2 down after wheelDown |
| 2195 | eventMouse2 = true; |
| 2196 | eventType = TMouseEvent.Type.MOUSE_MOTION; |
| 2197 | break; |
| 2198 | |
| 2199 | case 64: |
| 2200 | eventMouseWheelUp = true; |
| 2201 | break; |
| 2202 | |
| 2203 | case 65: |
| 2204 | eventMouseWheelDown = true; |
| 2205 | break; |
| 2206 | |
| 2207 | default: |
| 2208 | // Unknown, bail out |
| 2209 | return null; |
| 2210 | } |
| 2211 | return new TMouseEvent(eventType, x, y, x, y, |
| 2212 | eventMouse1, eventMouse2, eventMouse3, |
| 2213 | eventMouseWheelUp, eventMouseWheelDown); |
| 2214 | } |
| 2215 | |
| 2216 | /** |
| 2217 | * Return any events in the IO queue due to timeout. |
| 2218 | * |
| 2219 | * @param queue list to append new events to |
| 2220 | */ |
| 2221 | private void getIdleEvents(final List<TInputEvent> queue) { |
| 2222 | long nowTime = System.currentTimeMillis(); |
| 2223 | |
| 2224 | // Check for new window size |
| 2225 | long windowSizeDelay = nowTime - windowSizeTime; |
| 2226 | if (windowSizeDelay > 1000) { |
| 2227 | sessionInfo.queryWindowSize(); |
| 2228 | int newWidth = sessionInfo.getWindowWidth(); |
| 2229 | int newHeight = sessionInfo.getWindowHeight(); |
| 2230 | |
| 2231 | if ((newWidth != windowResize.getWidth()) |
| 2232 | || (newHeight != windowResize.getHeight()) |
| 2233 | ) { |
| 2234 | |
| 2235 | if (debugToStderr) { |
| 2236 | System.err.println("Screen size changed, old size " + |
| 2237 | windowResize); |
| 2238 | System.err.println(" new size " + |
| 2239 | newWidth + " x " + newHeight); |
| 2240 | } |
| 2241 | |
| 2242 | // Request xterm report window dimensions in pixels again. |
| 2243 | this.output.printf("%s", xtermReportWindowPixelDimensions()); |
| 2244 | this.output.flush(); |
| 2245 | |
| 2246 | TResizeEvent event = new TResizeEvent(TResizeEvent.Type.SCREEN, |
| 2247 | newWidth, newHeight); |
| 2248 | windowResize = new TResizeEvent(TResizeEvent.Type.SCREEN, |
| 2249 | newWidth, newHeight); |
| 2250 | queue.add(event); |
| 2251 | } |
| 2252 | windowSizeTime = nowTime; |
| 2253 | } |
| 2254 | |
| 2255 | // ESCDELAY type timeout |
| 2256 | if (state == ParseState.ESCAPE) { |
| 2257 | long escDelay = nowTime - escapeTime; |
| 2258 | if (escDelay > 100) { |
| 2259 | // After 0.1 seconds, assume a true escape character |
| 2260 | queue.add(controlChar((char)0x1B, false)); |
| 2261 | resetParser(); |
| 2262 | } |
| 2263 | } |
| 2264 | } |
| 2265 | |
| 2266 | /** |
| 2267 | * Returns true if the CSI parameter for a keyboard command means that |
| 2268 | * shift was down. |
| 2269 | */ |
| 2270 | private boolean csiIsShift(final String x) { |
| 2271 | if ((x.equals("2")) |
| 2272 | || (x.equals("4")) |
| 2273 | || (x.equals("6")) |
| 2274 | || (x.equals("8")) |
| 2275 | ) { |
| 2276 | return true; |
| 2277 | } |
| 2278 | return false; |
| 2279 | } |
| 2280 | |
| 2281 | /** |
| 2282 | * Returns true if the CSI parameter for a keyboard command means that |
| 2283 | * alt was down. |
| 2284 | */ |
| 2285 | private boolean csiIsAlt(final String x) { |
| 2286 | if ((x.equals("3")) |
| 2287 | || (x.equals("4")) |
| 2288 | || (x.equals("7")) |
| 2289 | || (x.equals("8")) |
| 2290 | ) { |
| 2291 | return true; |
| 2292 | } |
| 2293 | return false; |
| 2294 | } |
| 2295 | |
| 2296 | /** |
| 2297 | * Returns true if the CSI parameter for a keyboard command means that |
| 2298 | * ctrl was down. |
| 2299 | */ |
| 2300 | private boolean csiIsCtrl(final String x) { |
| 2301 | if ((x.equals("5")) |
| 2302 | || (x.equals("6")) |
| 2303 | || (x.equals("7")) |
| 2304 | || (x.equals("8")) |
| 2305 | ) { |
| 2306 | return true; |
| 2307 | } |
| 2308 | return false; |
| 2309 | } |
| 2310 | |
| 2311 | /** |
| 2312 | * Parses the next character of input to see if an InputEvent is |
| 2313 | * fully here. |
| 2314 | * |
| 2315 | * @param events list to append new events to |
| 2316 | * @param ch Unicode code point |
| 2317 | */ |
| 2318 | private void processChar(final List<TInputEvent> events, final char ch) { |
| 2319 | |
| 2320 | // ESCDELAY type timeout |
| 2321 | long nowTime = System.currentTimeMillis(); |
| 2322 | if (state == ParseState.ESCAPE) { |
| 2323 | long escDelay = nowTime - escapeTime; |
| 2324 | if (escDelay > 250) { |
| 2325 | // After 0.25 seconds, assume a true escape character |
| 2326 | events.add(controlChar((char)0x1B, false)); |
| 2327 | resetParser(); |
| 2328 | } |
| 2329 | } |
| 2330 | |
| 2331 | // TKeypress fields |
| 2332 | boolean ctrl = false; |
| 2333 | boolean alt = false; |
| 2334 | boolean shift = false; |
| 2335 | |
| 2336 | // System.err.printf("state: %s ch %c\r\n", state, ch); |
| 2337 | |
| 2338 | switch (state) { |
| 2339 | case GROUND: |
| 2340 | |
| 2341 | if (ch == 0x1B) { |
| 2342 | state = ParseState.ESCAPE; |
| 2343 | escapeTime = nowTime; |
| 2344 | return; |
| 2345 | } |
| 2346 | |
| 2347 | if (ch <= 0x1F) { |
| 2348 | // Control character |
| 2349 | events.add(controlChar(ch, false)); |
| 2350 | resetParser(); |
| 2351 | return; |
| 2352 | } |
| 2353 | |
| 2354 | if (ch >= 0x20) { |
| 2355 | // Normal character |
| 2356 | events.add(new TKeypressEvent(false, 0, ch, |
| 2357 | false, false, false)); |
| 2358 | resetParser(); |
| 2359 | return; |
| 2360 | } |
| 2361 | |
| 2362 | break; |
| 2363 | |
| 2364 | case ESCAPE: |
| 2365 | if (ch <= 0x1F) { |
| 2366 | // ALT-Control character |
| 2367 | events.add(controlChar(ch, true)); |
| 2368 | resetParser(); |
| 2369 | return; |
| 2370 | } |
| 2371 | |
| 2372 | if (ch == 'O') { |
| 2373 | // This will be one of the function keys |
| 2374 | state = ParseState.ESCAPE_INTERMEDIATE; |
| 2375 | return; |
| 2376 | } |
| 2377 | |
| 2378 | // '[' goes to CSI_ENTRY |
| 2379 | if (ch == '[') { |
| 2380 | state = ParseState.CSI_ENTRY; |
| 2381 | return; |
| 2382 | } |
| 2383 | |
| 2384 | // Everything else is assumed to be Alt-keystroke |
| 2385 | if ((ch >= 'A') && (ch <= 'Z')) { |
| 2386 | shift = true; |
| 2387 | } |
| 2388 | alt = true; |
| 2389 | events.add(new TKeypressEvent(false, 0, ch, alt, ctrl, shift)); |
| 2390 | resetParser(); |
| 2391 | return; |
| 2392 | |
| 2393 | case ESCAPE_INTERMEDIATE: |
| 2394 | if ((ch >= 'P') && (ch <= 'S')) { |
| 2395 | // Function key |
| 2396 | switch (ch) { |
| 2397 | case 'P': |
| 2398 | events.add(new TKeypressEvent(kbF1)); |
| 2399 | break; |
| 2400 | case 'Q': |
| 2401 | events.add(new TKeypressEvent(kbF2)); |
| 2402 | break; |
| 2403 | case 'R': |
| 2404 | events.add(new TKeypressEvent(kbF3)); |
| 2405 | break; |
| 2406 | case 'S': |
| 2407 | events.add(new TKeypressEvent(kbF4)); |
| 2408 | break; |
| 2409 | default: |
| 2410 | break; |
| 2411 | } |
| 2412 | resetParser(); |
| 2413 | return; |
| 2414 | } |
| 2415 | |
| 2416 | // Unknown keystroke, ignore |
| 2417 | resetParser(); |
| 2418 | return; |
| 2419 | |
| 2420 | case CSI_ENTRY: |
| 2421 | // Numbers - parameter values |
| 2422 | if ((ch >= '0') && (ch <= '9')) { |
| 2423 | params.set(params.size() - 1, |
| 2424 | params.get(params.size() - 1) + ch); |
| 2425 | state = ParseState.CSI_PARAM; |
| 2426 | return; |
| 2427 | } |
| 2428 | // Parameter separator |
| 2429 | if (ch == ';') { |
| 2430 | params.add(""); |
| 2431 | return; |
| 2432 | } |
| 2433 | |
| 2434 | if ((ch >= 0x30) && (ch <= 0x7E)) { |
| 2435 | switch (ch) { |
| 2436 | case 'A': |
| 2437 | // Up |
| 2438 | events.add(new TKeypressEvent(kbUp, alt, ctrl, shift)); |
| 2439 | resetParser(); |
| 2440 | return; |
| 2441 | case 'B': |
| 2442 | // Down |
| 2443 | events.add(new TKeypressEvent(kbDown, alt, ctrl, shift)); |
| 2444 | resetParser(); |
| 2445 | return; |
| 2446 | case 'C': |
| 2447 | // Right |
| 2448 | events.add(new TKeypressEvent(kbRight, alt, ctrl, shift)); |
| 2449 | resetParser(); |
| 2450 | return; |
| 2451 | case 'D': |
| 2452 | // Left |
| 2453 | events.add(new TKeypressEvent(kbLeft, alt, ctrl, shift)); |
| 2454 | resetParser(); |
| 2455 | return; |
| 2456 | case 'H': |
| 2457 | // Home |
| 2458 | events.add(new TKeypressEvent(kbHome)); |
| 2459 | resetParser(); |
| 2460 | return; |
| 2461 | case 'F': |
| 2462 | // End |
| 2463 | events.add(new TKeypressEvent(kbEnd)); |
| 2464 | resetParser(); |
| 2465 | return; |
| 2466 | case 'Z': |
| 2467 | // CBT - Cursor backward X tab stops (default 1) |
| 2468 | events.add(new TKeypressEvent(kbBackTab)); |
| 2469 | resetParser(); |
| 2470 | return; |
| 2471 | case 'M': |
| 2472 | // Mouse position |
| 2473 | state = ParseState.MOUSE; |
| 2474 | return; |
| 2475 | case '<': |
| 2476 | // Mouse position, SGR (1006) coordinates |
| 2477 | state = ParseState.MOUSE_SGR; |
| 2478 | return; |
| 2479 | default: |
| 2480 | break; |
| 2481 | } |
| 2482 | } |
| 2483 | |
| 2484 | // Unknown keystroke, ignore |
| 2485 | resetParser(); |
| 2486 | return; |
| 2487 | |
| 2488 | case MOUSE_SGR: |
| 2489 | // Numbers - parameter values |
| 2490 | if ((ch >= '0') && (ch <= '9')) { |
| 2491 | params.set(params.size() - 1, |
| 2492 | params.get(params.size() - 1) + ch); |
| 2493 | return; |
| 2494 | } |
| 2495 | // Parameter separator |
| 2496 | if (ch == ';') { |
| 2497 | params.add(""); |
| 2498 | return; |
| 2499 | } |
| 2500 | |
| 2501 | switch (ch) { |
| 2502 | case 'M': |
| 2503 | // Generate a mouse press event |
| 2504 | TInputEvent event = parseMouseSGR(false); |
| 2505 | if (event != null) { |
| 2506 | events.add(event); |
| 2507 | } |
| 2508 | resetParser(); |
| 2509 | return; |
| 2510 | case 'm': |
| 2511 | // Generate a mouse release event |
| 2512 | event = parseMouseSGR(true); |
| 2513 | if (event != null) { |
| 2514 | events.add(event); |
| 2515 | } |
| 2516 | resetParser(); |
| 2517 | return; |
| 2518 | default: |
| 2519 | break; |
| 2520 | } |
| 2521 | |
| 2522 | // Unknown keystroke, ignore |
| 2523 | resetParser(); |
| 2524 | return; |
| 2525 | |
| 2526 | case CSI_PARAM: |
| 2527 | // Numbers - parameter values |
| 2528 | if ((ch >= '0') && (ch <= '9')) { |
| 2529 | params.set(params.size() - 1, |
| 2530 | params.get(params.size() - 1) + ch); |
| 2531 | state = ParseState.CSI_PARAM; |
| 2532 | return; |
| 2533 | } |
| 2534 | // Parameter separator |
| 2535 | if (ch == ';') { |
| 2536 | params.add(""); |
| 2537 | return; |
| 2538 | } |
| 2539 | |
| 2540 | if (ch == '~') { |
| 2541 | events.add(csiFnKey()); |
| 2542 | resetParser(); |
| 2543 | return; |
| 2544 | } |
| 2545 | |
| 2546 | if ((ch >= 0x30) && (ch <= 0x7E)) { |
| 2547 | switch (ch) { |
| 2548 | case 'A': |
| 2549 | // Up |
| 2550 | if (params.size() > 1) { |
| 2551 | shift = csiIsShift(params.get(1)); |
| 2552 | alt = csiIsAlt(params.get(1)); |
| 2553 | ctrl = csiIsCtrl(params.get(1)); |
| 2554 | } |
| 2555 | events.add(new TKeypressEvent(kbUp, alt, ctrl, shift)); |
| 2556 | resetParser(); |
| 2557 | return; |
| 2558 | case 'B': |
| 2559 | // Down |
| 2560 | if (params.size() > 1) { |
| 2561 | shift = csiIsShift(params.get(1)); |
| 2562 | alt = csiIsAlt(params.get(1)); |
| 2563 | ctrl = csiIsCtrl(params.get(1)); |
| 2564 | } |
| 2565 | events.add(new TKeypressEvent(kbDown, alt, ctrl, shift)); |
| 2566 | resetParser(); |
| 2567 | return; |
| 2568 | case 'C': |
| 2569 | // Right |
| 2570 | if (params.size() > 1) { |
| 2571 | shift = csiIsShift(params.get(1)); |
| 2572 | alt = csiIsAlt(params.get(1)); |
| 2573 | ctrl = csiIsCtrl(params.get(1)); |
| 2574 | } |
| 2575 | events.add(new TKeypressEvent(kbRight, alt, ctrl, shift)); |
| 2576 | resetParser(); |
| 2577 | return; |
| 2578 | case 'D': |
| 2579 | // Left |
| 2580 | if (params.size() > 1) { |
| 2581 | shift = csiIsShift(params.get(1)); |
| 2582 | alt = csiIsAlt(params.get(1)); |
| 2583 | ctrl = csiIsCtrl(params.get(1)); |
| 2584 | } |
| 2585 | events.add(new TKeypressEvent(kbLeft, alt, ctrl, shift)); |
| 2586 | resetParser(); |
| 2587 | return; |
| 2588 | case 'H': |
| 2589 | // Home |
| 2590 | if (params.size() > 1) { |
| 2591 | shift = csiIsShift(params.get(1)); |
| 2592 | alt = csiIsAlt(params.get(1)); |
| 2593 | ctrl = csiIsCtrl(params.get(1)); |
| 2594 | } |
| 2595 | events.add(new TKeypressEvent(kbHome, alt, ctrl, shift)); |
| 2596 | resetParser(); |
| 2597 | return; |
| 2598 | case 'F': |
| 2599 | // End |
| 2600 | if (params.size() > 1) { |
| 2601 | shift = csiIsShift(params.get(1)); |
| 2602 | alt = csiIsAlt(params.get(1)); |
| 2603 | ctrl = csiIsCtrl(params.get(1)); |
| 2604 | } |
| 2605 | events.add(new TKeypressEvent(kbEnd, alt, ctrl, shift)); |
| 2606 | resetParser(); |
| 2607 | return; |
| 2608 | case 't': |
| 2609 | // windowOps |
| 2610 | if ((params.size() > 2) && (params.get(0).equals("4"))) { |
| 2611 | if (debugToStderr) { |
| 2612 | System.err.printf("windowOp pixels: " + |
| 2613 | "height %s width %s\n", |
| 2614 | params.get(1), params.get(2)); |
| 2615 | } |
| 2616 | try { |
| 2617 | widthPixels = Integer.parseInt(params.get(2)); |
| 2618 | heightPixels = Integer.parseInt(params.get(1)); |
| 2619 | } catch (NumberFormatException e) { |
| 2620 | if (debugToStderr) { |
| 2621 | e.printStackTrace(); |
| 2622 | } |
| 2623 | } |
| 2624 | if (widthPixels <= 0) { |
| 2625 | widthPixels = 640; |
| 2626 | } |
| 2627 | if (heightPixels <= 0) { |
| 2628 | heightPixels = 400; |
| 2629 | } |
| 2630 | } |
| 2631 | resetParser(); |
| 2632 | return; |
| 2633 | default: |
| 2634 | break; |
| 2635 | } |
| 2636 | } |
| 2637 | |
| 2638 | // Unknown keystroke, ignore |
| 2639 | resetParser(); |
| 2640 | return; |
| 2641 | |
| 2642 | case MOUSE: |
| 2643 | params.set(0, params.get(params.size() - 1) + ch); |
| 2644 | if (params.get(0).length() == 3) { |
| 2645 | // We have enough to generate a mouse event |
| 2646 | events.add(parseMouse()); |
| 2647 | resetParser(); |
| 2648 | } |
| 2649 | return; |
| 2650 | |
| 2651 | default: |
| 2652 | break; |
| 2653 | } |
| 2654 | |
| 2655 | // This "should" be impossible to reach |
| 2656 | return; |
| 2657 | } |
| 2658 | |
| 2659 | /** |
| 2660 | * Request (u)xterm to report the current window size dimensions. |
| 2661 | * |
| 2662 | * @return the string to emit to xterm |
| 2663 | */ |
| 2664 | private String xtermReportWindowPixelDimensions() { |
| 2665 | return "\033[14t"; |
| 2666 | } |
| 2667 | |
| 2668 | /** |
| 2669 | * Tell (u)xterm that we want alt- keystrokes to send escape + character |
| 2670 | * rather than set the 8th bit. Anyone who wants UTF8 should want this |
| 2671 | * enabled. |
| 2672 | * |
| 2673 | * @param on if true, enable metaSendsEscape |
| 2674 | * @return the string to emit to xterm |
| 2675 | */ |
| 2676 | private String xtermMetaSendsEscape(final boolean on) { |
| 2677 | if (on) { |
| 2678 | return "\033[?1036h\033[?1034l"; |
| 2679 | } |
| 2680 | return "\033[?1036l"; |
| 2681 | } |
| 2682 | |
| 2683 | /** |
| 2684 | * Create an xterm OSC sequence to change the window title. |
| 2685 | * |
| 2686 | * @param title the new title |
| 2687 | * @return the string to emit to xterm |
| 2688 | */ |
| 2689 | private String getSetTitleString(final String title) { |
| 2690 | return "\033]2;" + title + "\007"; |
| 2691 | } |
| 2692 | |
| 2693 | // ------------------------------------------------------------------------ |
| 2694 | // Sixel output support --------------------------------------------------- |
| 2695 | // ------------------------------------------------------------------------ |
| 2696 | |
| 2697 | /** |
| 2698 | * Start a sixel string for display one row's worth of bitmap data. |
| 2699 | * |
| 2700 | * @param x column coordinate. 0 is the left-most column. |
| 2701 | * @param y row coordinate. 0 is the top-most row. |
| 2702 | * @return the string to emit to an ANSI / ECMA-style terminal |
| 2703 | */ |
| 2704 | private String startSixel(final int x, final int y) { |
| 2705 | StringBuilder sb = new StringBuilder(); |
| 2706 | |
| 2707 | assert (sixel == true); |
| 2708 | |
| 2709 | // Place the cursor |
| 2710 | sb.append(gotoXY(x, y)); |
| 2711 | |
| 2712 | // DCS |
| 2713 | sb.append("\033Pq"); |
| 2714 | |
| 2715 | if (palette == null) { |
| 2716 | palette = new SixelPalette(); |
| 2717 | } |
| 2718 | |
| 2719 | return sb.toString(); |
| 2720 | } |
| 2721 | |
| 2722 | /** |
| 2723 | * End a sixel string for display one row's worth of bitmap data. |
| 2724 | * |
| 2725 | * @return the string to emit to an ANSI / ECMA-style terminal |
| 2726 | */ |
| 2727 | private String endSixel() { |
| 2728 | assert (sixel == true); |
| 2729 | |
| 2730 | // ST |
| 2731 | return ("\033\\"); |
| 2732 | } |
| 2733 | |
| 2734 | /** |
| 2735 | * Create a sixel string representing a row of several cells containing |
| 2736 | * bitmap data. |
| 2737 | * |
| 2738 | * @param x column coordinate. 0 is the left-most column. |
| 2739 | * @param y row coordinate. 0 is the top-most row. |
| 2740 | * @param cells the cells containing the bitmap data |
| 2741 | * @return the string to emit to an ANSI / ECMA-style terminal |
| 2742 | */ |
| 2743 | private String toSixel(final int x, final int y, |
| 2744 | final ArrayList<Cell> cells) { |
| 2745 | |
| 2746 | StringBuilder sb = new StringBuilder(); |
| 2747 | |
| 2748 | assert (sixel == true); |
| 2749 | assert (cells != null); |
| 2750 | assert (cells.size() > 0); |
| 2751 | assert (cells.get(0).getImage() != null); |
| 2752 | |
| 2753 | if (sixelCache == null) { |
| 2754 | sixelCache = new SixelCache(height * 10); |
| 2755 | } |
| 2756 | |
| 2757 | // Save and get rows to/from the cache that do NOT have inverted |
| 2758 | // cells. |
| 2759 | boolean saveInCache = true; |
| 2760 | for (Cell cell: cells) { |
| 2761 | if (cell.isInvertedImage()) { |
| 2762 | saveInCache = false; |
| 2763 | } |
| 2764 | } |
| 2765 | if (saveInCache) { |
| 2766 | String cachedResult = sixelCache.get(cells); |
| 2767 | if (cachedResult != null) { |
| 2768 | // System.err.println("CACHE HIT"); |
| 2769 | sb.append(startSixel(x, y)); |
| 2770 | sb.append(cachedResult); |
| 2771 | sb.append(endSixel()); |
| 2772 | return sb.toString(); |
| 2773 | } |
| 2774 | // System.err.println("CACHE MISS"); |
| 2775 | } |
| 2776 | |
| 2777 | int imageWidth = cells.get(0).getImage().getWidth(); |
| 2778 | int imageHeight = cells.get(0).getImage().getHeight(); |
| 2779 | |
| 2780 | // cells.get(x).getImage() has a dithered bitmap containing indexes |
| 2781 | // into the color palette. Piece these together into one larger |
| 2782 | // image for final rendering. |
| 2783 | int totalWidth = 0; |
| 2784 | int fullWidth = cells.size() * getTextWidth(); |
| 2785 | int fullHeight = getTextHeight(); |
| 2786 | for (int i = 0; i < cells.size(); i++) { |
| 2787 | totalWidth += cells.get(i).getImage().getWidth(); |
| 2788 | } |
| 2789 | |
| 2790 | BufferedImage image = new BufferedImage(fullWidth, |
| 2791 | fullHeight, BufferedImage.TYPE_INT_ARGB); |
| 2792 | |
| 2793 | int [] rgbArray; |
| 2794 | for (int i = 0; i < cells.size() - 1; i++) { |
| 2795 | if (cells.get(i).isInvertedImage()) { |
| 2796 | rgbArray = new int[imageWidth * imageHeight]; |
| 2797 | for (int j = 0; j < rgbArray.length; j++) { |
| 2798 | rgbArray[j] = 0xFFFFFF; |
| 2799 | } |
| 2800 | } else { |
| 2801 | rgbArray = cells.get(i).getImage().getRGB(0, 0, |
| 2802 | imageWidth, imageHeight, null, 0, imageWidth); |
| 2803 | } |
| 2804 | image.setRGB(i * imageWidth, 0, imageWidth, imageHeight, |
| 2805 | rgbArray, 0, imageWidth); |
| 2806 | if (imageHeight < fullHeight) { |
| 2807 | int backgroundColor = cells.get(i).getBackground().getRGB(); |
| 2808 | for (int imageX = 0; imageX < image.getWidth(); imageX++) { |
| 2809 | for (int imageY = imageHeight; imageY < fullHeight; |
| 2810 | imageY++) { |
| 2811 | |
| 2812 | image.setRGB(imageX, imageY, backgroundColor); |
| 2813 | } |
| 2814 | } |
| 2815 | } |
| 2816 | } |
| 2817 | totalWidth -= ((cells.size() - 1) * imageWidth); |
| 2818 | if (cells.get(cells.size() - 1).isInvertedImage()) { |
| 2819 | rgbArray = new int[totalWidth * imageHeight]; |
| 2820 | for (int j = 0; j < rgbArray.length; j++) { |
| 2821 | rgbArray[j] = 0xFFFFFF; |
| 2822 | } |
| 2823 | } else { |
| 2824 | rgbArray = cells.get(cells.size() - 1).getImage().getRGB(0, 0, |
| 2825 | totalWidth, imageHeight, null, 0, totalWidth); |
| 2826 | } |
| 2827 | image.setRGB((cells.size() - 1) * imageWidth, 0, totalWidth, |
| 2828 | imageHeight, rgbArray, 0, totalWidth); |
| 2829 | |
| 2830 | if (totalWidth < getTextWidth()) { |
| 2831 | int backgroundColor = cells.get(cells.size() - 1).getBackground().getRGB(); |
| 2832 | |
| 2833 | for (int imageX = image.getWidth() - totalWidth; |
| 2834 | imageX < image.getWidth(); imageX++) { |
| 2835 | |
| 2836 | for (int imageY = 0; imageY < fullHeight; imageY++) { |
| 2837 | image.setRGB(imageX, imageY, backgroundColor); |
| 2838 | } |
| 2839 | } |
| 2840 | } |
| 2841 | |
| 2842 | // Dither the image. It is ok to lose the original here. |
| 2843 | if (palette == null) { |
| 2844 | palette = new SixelPalette(); |
| 2845 | } |
| 2846 | image = palette.ditherImage(image); |
| 2847 | |
| 2848 | // Emit the palette, but only for the colors actually used by these |
| 2849 | // cells. |
| 2850 | boolean [] usedColors = new boolean[MAX_COLOR_REGISTERS]; |
| 2851 | for (int imageX = 0; imageX < image.getWidth(); imageX++) { |
| 2852 | for (int imageY = 0; imageY < image.getHeight(); imageY++) { |
| 2853 | usedColors[image.getRGB(imageX, imageY)] = true; |
| 2854 | } |
| 2855 | } |
| 2856 | palette.emitPalette(sb, usedColors); |
| 2857 | |
| 2858 | // Render the entire row of cells. |
| 2859 | for (int currentRow = 0; currentRow < fullHeight; currentRow += 6) { |
| 2860 | int [][] sixels = new int[image.getWidth()][6]; |
| 2861 | |
| 2862 | // See which colors are actually used in this band of sixels. |
| 2863 | for (int imageX = 0; imageX < image.getWidth(); imageX++) { |
| 2864 | for (int imageY = 0; |
| 2865 | (imageY < 6) && (imageY + currentRow < fullHeight); |
| 2866 | imageY++) { |
| 2867 | |
| 2868 | int colorIdx = image.getRGB(imageX, imageY + currentRow); |
| 2869 | assert (colorIdx >= 0); |
| 2870 | assert (colorIdx < MAX_COLOR_REGISTERS); |
| 2871 | |
| 2872 | sixels[imageX][imageY] = colorIdx; |
| 2873 | } |
| 2874 | } |
| 2875 | |
| 2876 | for (int i = 0; i < MAX_COLOR_REGISTERS; i++) { |
| 2877 | boolean isUsed = false; |
| 2878 | for (int imageX = 0; imageX < image.getWidth(); imageX++) { |
| 2879 | for (int j = 0; j < 6; j++) { |
| 2880 | if (sixels[imageX][j] == i) { |
| 2881 | isUsed = true; |
| 2882 | } |
| 2883 | } |
| 2884 | } |
| 2885 | if (isUsed == false) { |
| 2886 | continue; |
| 2887 | } |
| 2888 | |
| 2889 | // Set to the beginning of scan line for the next set of |
| 2890 | // colored pixels, and select the color. |
| 2891 | sb.append(String.format("$#%d", i)); |
| 2892 | |
| 2893 | for (int imageX = 0; imageX < image.getWidth(); imageX++) { |
| 2894 | |
| 2895 | // Add up all the pixels that match this color. |
| 2896 | int data = 0; |
| 2897 | for (int j = 0; |
| 2898 | (j < 6) && (currentRow + j < fullHeight); |
| 2899 | j++) { |
| 2900 | |
| 2901 | if (sixels[imageX][j] == i) { |
| 2902 | switch (j) { |
| 2903 | case 0: |
| 2904 | data += 1; |
| 2905 | break; |
| 2906 | case 1: |
| 2907 | data += 2; |
| 2908 | break; |
| 2909 | case 2: |
| 2910 | data += 4; |
| 2911 | break; |
| 2912 | case 3: |
| 2913 | data += 8; |
| 2914 | break; |
| 2915 | case 4: |
| 2916 | data += 16; |
| 2917 | break; |
| 2918 | case 5: |
| 2919 | data += 32; |
| 2920 | break; |
| 2921 | } |
| 2922 | } |
| 2923 | } |
| 2924 | assert (data >= 0); |
| 2925 | assert (data < 127); |
| 2926 | data += 63; |
| 2927 | sb.append((char) data); |
| 2928 | } // for (int imageX = 0; imageX < image.getWidth(); imageX++) |
| 2929 | } // for (int i = 0; i < MAX_COLOR_REGISTERS; i++) |
| 2930 | |
| 2931 | // Advance to the next scan line. |
| 2932 | sb.append("-"); |
| 2933 | |
| 2934 | } // for (int currentRow = 0; currentRow < imageHeight; currentRow += 6) |
| 2935 | |
| 2936 | // Kill the very last "-", because it is unnecessary. |
| 2937 | sb.deleteCharAt(sb.length() - 1); |
| 2938 | |
| 2939 | if (saveInCache) { |
| 2940 | // This row is OK to save into the cache. |
| 2941 | sixelCache.put(cells, sb.toString()); |
| 2942 | } |
| 2943 | |
| 2944 | return (startSixel(x, y) + sb.toString() + endSixel()); |
| 2945 | } |
| 2946 | |
| 2947 | // ------------------------------------------------------------------------ |
| 2948 | // End sixel output support ----------------------------------------------- |
| 2949 | // ------------------------------------------------------------------------ |
| 2950 | |
| 2951 | /** |
| 2952 | * Create a SGR parameter sequence for a single color change. |
| 2953 | * |
| 2954 | * @param bold if true, set bold |
| 2955 | * @param color one of the Color.WHITE, Color.BLUE, etc. constants |
| 2956 | * @param foreground if true, this is a foreground color |
| 2957 | * @return the string to emit to an ANSI / ECMA-style terminal, |
| 2958 | * e.g. "\033[42m" |
| 2959 | */ |
| 2960 | private String color(final boolean bold, final Color color, |
| 2961 | final boolean foreground) { |
| 2962 | return color(color, foreground, true) + |
| 2963 | rgbColor(bold, color, foreground); |
| 2964 | } |
| 2965 | |
| 2966 | /** |
| 2967 | * Create a T.416 RGB parameter sequence for a single color change. |
| 2968 | * |
| 2969 | * @param colorRGB a 24-bit RGB value for foreground color |
| 2970 | * @param foreground if true, this is a foreground color |
| 2971 | * @return the string to emit to an ANSI / ECMA-style terminal, |
| 2972 | * e.g. "\033[42m" |
| 2973 | */ |
| 2974 | private String colorRGB(final int colorRGB, final boolean foreground) { |
| 2975 | |
| 2976 | int colorRed = (colorRGB >>> 16) & 0xFF; |
| 2977 | int colorGreen = (colorRGB >>> 8) & 0xFF; |
| 2978 | int colorBlue = colorRGB & 0xFF; |
| 2979 | |
| 2980 | StringBuilder sb = new StringBuilder(); |
| 2981 | if (foreground) { |
| 2982 | sb.append("\033[38;2;"); |
| 2983 | } else { |
| 2984 | sb.append("\033[48;2;"); |
| 2985 | } |
| 2986 | sb.append(String.format("%d;%d;%dm", colorRed, colorGreen, colorBlue)); |
| 2987 | return sb.toString(); |
| 2988 | } |
| 2989 | |
| 2990 | /** |
| 2991 | * Create a T.416 RGB parameter sequence for both foreground and |
| 2992 | * background color change. |
| 2993 | * |
| 2994 | * @param foreColorRGB a 24-bit RGB value for foreground color |
| 2995 | * @param backColorRGB a 24-bit RGB value for foreground color |
| 2996 | * @return the string to emit to an ANSI / ECMA-style terminal, |
| 2997 | * e.g. "\033[42m" |
| 2998 | */ |
| 2999 | private String colorRGB(final int foreColorRGB, final int backColorRGB) { |
| 3000 | int foreColorRed = (foreColorRGB >>> 16) & 0xFF; |
| 3001 | int foreColorGreen = (foreColorRGB >>> 8) & 0xFF; |
| 3002 | int foreColorBlue = foreColorRGB & 0xFF; |
| 3003 | int backColorRed = (backColorRGB >>> 16) & 0xFF; |
| 3004 | int backColorGreen = (backColorRGB >>> 8) & 0xFF; |
| 3005 | int backColorBlue = backColorRGB & 0xFF; |
| 3006 | |
| 3007 | StringBuilder sb = new StringBuilder(); |
| 3008 | sb.append(String.format("\033[38;2;%d;%d;%dm", |
| 3009 | foreColorRed, foreColorGreen, foreColorBlue)); |
| 3010 | sb.append(String.format("\033[48;2;%d;%d;%dm", |
| 3011 | backColorRed, backColorGreen, backColorBlue)); |
| 3012 | return sb.toString(); |
| 3013 | } |
| 3014 | |
| 3015 | /** |
| 3016 | * Create a T.416 RGB parameter sequence for a single color change. |
| 3017 | * |
| 3018 | * @param bold if true, set bold |
| 3019 | * @param color one of the Color.WHITE, Color.BLUE, etc. constants |
| 3020 | * @param foreground if true, this is a foreground color |
| 3021 | * @return the string to emit to an xterm terminal with RGB support, |
| 3022 | * e.g. "\033[38;2;RR;GG;BBm" |
| 3023 | */ |
| 3024 | private String rgbColor(final boolean bold, final Color color, |
| 3025 | final boolean foreground) { |
| 3026 | if (doRgbColor == false) { |
| 3027 | return ""; |
| 3028 | } |
| 3029 | StringBuilder sb = new StringBuilder("\033["); |
| 3030 | if (bold) { |
| 3031 | // Bold implies foreground only |
| 3032 | sb.append("38;2;"); |
| 3033 | if (color.equals(Color.BLACK)) { |
| 3034 | sb.append("84;84;84"); |
| 3035 | } else if (color.equals(Color.RED)) { |
| 3036 | sb.append("252;84;84"); |
| 3037 | } else if (color.equals(Color.GREEN)) { |
| 3038 | sb.append("84;252;84"); |
| 3039 | } else if (color.equals(Color.YELLOW)) { |
| 3040 | sb.append("252;252;84"); |
| 3041 | } else if (color.equals(Color.BLUE)) { |
| 3042 | sb.append("84;84;252"); |
| 3043 | } else if (color.equals(Color.MAGENTA)) { |
| 3044 | sb.append("252;84;252"); |
| 3045 | } else if (color.equals(Color.CYAN)) { |
| 3046 | sb.append("84;252;252"); |
| 3047 | } else if (color.equals(Color.WHITE)) { |
| 3048 | sb.append("252;252;252"); |
| 3049 | } |
| 3050 | } else { |
| 3051 | if (foreground) { |
| 3052 | sb.append("38;2;"); |
| 3053 | } else { |
| 3054 | sb.append("48;2;"); |
| 3055 | } |
| 3056 | if (color.equals(Color.BLACK)) { |
| 3057 | sb.append("0;0;0"); |
| 3058 | } else if (color.equals(Color.RED)) { |
| 3059 | sb.append("168;0;0"); |
| 3060 | } else if (color.equals(Color.GREEN)) { |
| 3061 | sb.append("0;168;0"); |
| 3062 | } else if (color.equals(Color.YELLOW)) { |
| 3063 | sb.append("168;84;0"); |
| 3064 | } else if (color.equals(Color.BLUE)) { |
| 3065 | sb.append("0;0;168"); |
| 3066 | } else if (color.equals(Color.MAGENTA)) { |
| 3067 | sb.append("168;0;168"); |
| 3068 | } else if (color.equals(Color.CYAN)) { |
| 3069 | sb.append("0;168;168"); |
| 3070 | } else if (color.equals(Color.WHITE)) { |
| 3071 | sb.append("168;168;168"); |
| 3072 | } |
| 3073 | } |
| 3074 | sb.append("m"); |
| 3075 | return sb.toString(); |
| 3076 | } |
| 3077 | |
| 3078 | /** |
| 3079 | * Create a T.416 RGB parameter sequence for both foreground and |
| 3080 | * background color change. |
| 3081 | * |
| 3082 | * @param bold if true, set bold |
| 3083 | * @param foreColor one of the Color.WHITE, Color.BLUE, etc. constants |
| 3084 | * @param backColor one of the Color.WHITE, Color.BLUE, etc. constants |
| 3085 | * @return the string to emit to an xterm terminal with RGB support, |
| 3086 | * e.g. "\033[38;2;RR;GG;BB;48;2;RR;GG;BBm" |
| 3087 | */ |
| 3088 | private String rgbColor(final boolean bold, final Color foreColor, |
| 3089 | final Color backColor) { |
| 3090 | if (doRgbColor == false) { |
| 3091 | return ""; |
| 3092 | } |
| 3093 | |
| 3094 | return rgbColor(bold, foreColor, true) + |
| 3095 | rgbColor(false, backColor, false); |
| 3096 | } |
| 3097 | |
| 3098 | /** |
| 3099 | * Create a SGR parameter sequence for a single color change. |
| 3100 | * |
| 3101 | * @param color one of the Color.WHITE, Color.BLUE, etc. constants |
| 3102 | * @param foreground if true, this is a foreground color |
| 3103 | * @param header if true, make the full header, otherwise just emit the |
| 3104 | * color parameter e.g. "42;" |
| 3105 | * @return the string to emit to an ANSI / ECMA-style terminal, |
| 3106 | * e.g. "\033[42m" |
| 3107 | */ |
| 3108 | private String color(final Color color, final boolean foreground, |
| 3109 | final boolean header) { |
| 3110 | |
| 3111 | int ecmaColor = color.getValue(); |
| 3112 | |
| 3113 | // Convert Color.* values to SGR numerics |
| 3114 | if (foreground) { |
| 3115 | ecmaColor += 30; |
| 3116 | } else { |
| 3117 | ecmaColor += 40; |
| 3118 | } |
| 3119 | |
| 3120 | if (header) { |
| 3121 | return String.format("\033[%dm", ecmaColor); |
| 3122 | } else { |
| 3123 | return String.format("%d;", ecmaColor); |
| 3124 | } |
| 3125 | } |
| 3126 | |
| 3127 | /** |
| 3128 | * Create a SGR parameter sequence for both foreground and background |
| 3129 | * color change. |
| 3130 | * |
| 3131 | * @param bold if true, set bold |
| 3132 | * @param foreColor one of the Color.WHITE, Color.BLUE, etc. constants |
| 3133 | * @param backColor one of the Color.WHITE, Color.BLUE, etc. constants |
| 3134 | * @return the string to emit to an ANSI / ECMA-style terminal, |
| 3135 | * e.g. "\033[31;42m" |
| 3136 | */ |
| 3137 | private String color(final boolean bold, final Color foreColor, |
| 3138 | final Color backColor) { |
| 3139 | return color(foreColor, backColor, true) + |
| 3140 | rgbColor(bold, foreColor, backColor); |
| 3141 | } |
| 3142 | |
| 3143 | /** |
| 3144 | * Create a SGR parameter sequence for both foreground and |
| 3145 | * background color change. |
| 3146 | * |
| 3147 | * @param foreColor one of the Color.WHITE, Color.BLUE, etc. constants |
| 3148 | * @param backColor one of the Color.WHITE, Color.BLUE, etc. constants |
| 3149 | * @param header if true, make the full header, otherwise just emit the |
| 3150 | * color parameter e.g. "31;42;" |
| 3151 | * @return the string to emit to an ANSI / ECMA-style terminal, |
| 3152 | * e.g. "\033[31;42m" |
| 3153 | */ |
| 3154 | private String color(final Color foreColor, final Color backColor, |
| 3155 | final boolean header) { |
| 3156 | |
| 3157 | int ecmaForeColor = foreColor.getValue(); |
| 3158 | int ecmaBackColor = backColor.getValue(); |
| 3159 | |
| 3160 | // Convert Color.* values to SGR numerics |
| 3161 | ecmaBackColor += 40; |
| 3162 | ecmaForeColor += 30; |
| 3163 | |
| 3164 | if (header) { |
| 3165 | return String.format("\033[%d;%dm", ecmaForeColor, ecmaBackColor); |
| 3166 | } else { |
| 3167 | return String.format("%d;%d;", ecmaForeColor, ecmaBackColor); |
| 3168 | } |
| 3169 | } |
| 3170 | |
| 3171 | /** |
| 3172 | * Create a SGR parameter sequence for foreground, background, and |
| 3173 | * several attributes. This sequence first resets all attributes to |
| 3174 | * default, then sets attributes as per the parameters. |
| 3175 | * |
| 3176 | * @param foreColor one of the Color.WHITE, Color.BLUE, etc. constants |
| 3177 | * @param backColor one of the Color.WHITE, Color.BLUE, etc. constants |
| 3178 | * @param bold if true, set bold |
| 3179 | * @param reverse if true, set reverse |
| 3180 | * @param blink if true, set blink |
| 3181 | * @param underline if true, set underline |
| 3182 | * @return the string to emit to an ANSI / ECMA-style terminal, |
| 3183 | * e.g. "\033[0;1;31;42m" |
| 3184 | */ |
| 3185 | private String color(final Color foreColor, final Color backColor, |
| 3186 | final boolean bold, final boolean reverse, final boolean blink, |
| 3187 | final boolean underline) { |
| 3188 | |
| 3189 | int ecmaForeColor = foreColor.getValue(); |
| 3190 | int ecmaBackColor = backColor.getValue(); |
| 3191 | |
| 3192 | // Convert Color.* values to SGR numerics |
| 3193 | ecmaBackColor += 40; |
| 3194 | ecmaForeColor += 30; |
| 3195 | |
| 3196 | StringBuilder sb = new StringBuilder(); |
| 3197 | if ( bold && reverse && blink && !underline ) { |
| 3198 | sb.append("\033[0;1;7;5;"); |
| 3199 | } else if ( bold && reverse && !blink && !underline ) { |
| 3200 | sb.append("\033[0;1;7;"); |
| 3201 | } else if ( !bold && reverse && blink && !underline ) { |
| 3202 | sb.append("\033[0;7;5;"); |
| 3203 | } else if ( bold && !reverse && blink && !underline ) { |
| 3204 | sb.append("\033[0;1;5;"); |
| 3205 | } else if ( bold && !reverse && !blink && !underline ) { |
| 3206 | sb.append("\033[0;1;"); |
| 3207 | } else if ( !bold && reverse && !blink && !underline ) { |
| 3208 | sb.append("\033[0;7;"); |
| 3209 | } else if ( !bold && !reverse && blink && !underline) { |
| 3210 | sb.append("\033[0;5;"); |
| 3211 | } else if ( bold && reverse && blink && underline ) { |
| 3212 | sb.append("\033[0;1;7;5;4;"); |
| 3213 | } else if ( bold && reverse && !blink && underline ) { |
| 3214 | sb.append("\033[0;1;7;4;"); |
| 3215 | } else if ( !bold && reverse && blink && underline ) { |
| 3216 | sb.append("\033[0;7;5;4;"); |
| 3217 | } else if ( bold && !reverse && blink && underline ) { |
| 3218 | sb.append("\033[0;1;5;4;"); |
| 3219 | } else if ( bold && !reverse && !blink && underline ) { |
| 3220 | sb.append("\033[0;1;4;"); |
| 3221 | } else if ( !bold && reverse && !blink && underline ) { |
| 3222 | sb.append("\033[0;7;4;"); |
| 3223 | } else if ( !bold && !reverse && blink && underline) { |
| 3224 | sb.append("\033[0;5;4;"); |
| 3225 | } else if ( !bold && !reverse && !blink && underline) { |
| 3226 | sb.append("\033[0;4;"); |
| 3227 | } else { |
| 3228 | assert (!bold && !reverse && !blink && !underline); |
| 3229 | sb.append("\033[0;"); |
| 3230 | } |
| 3231 | sb.append(String.format("%d;%dm", ecmaForeColor, ecmaBackColor)); |
| 3232 | sb.append(rgbColor(bold, foreColor, backColor)); |
| 3233 | return sb.toString(); |
| 3234 | } |
| 3235 | |
| 3236 | /** |
| 3237 | * Create a SGR parameter sequence for foreground, background, and |
| 3238 | * several attributes. This sequence first resets all attributes to |
| 3239 | * default, then sets attributes as per the parameters. |
| 3240 | * |
| 3241 | * @param foreColorRGB a 24-bit RGB value for foreground color |
| 3242 | * @param backColorRGB a 24-bit RGB value for foreground color |
| 3243 | * @param bold if true, set bold |
| 3244 | * @param reverse if true, set reverse |
| 3245 | * @param blink if true, set blink |
| 3246 | * @param underline if true, set underline |
| 3247 | * @return the string to emit to an ANSI / ECMA-style terminal, |
| 3248 | * e.g. "\033[0;1;31;42m" |
| 3249 | */ |
| 3250 | private String colorRGB(final int foreColorRGB, final int backColorRGB, |
| 3251 | final boolean bold, final boolean reverse, final boolean blink, |
| 3252 | final boolean underline) { |
| 3253 | |
| 3254 | int foreColorRed = (foreColorRGB >>> 16) & 0xFF; |
| 3255 | int foreColorGreen = (foreColorRGB >>> 8) & 0xFF; |
| 3256 | int foreColorBlue = foreColorRGB & 0xFF; |
| 3257 | int backColorRed = (backColorRGB >>> 16) & 0xFF; |
| 3258 | int backColorGreen = (backColorRGB >>> 8) & 0xFF; |
| 3259 | int backColorBlue = backColorRGB & 0xFF; |
| 3260 | |
| 3261 | StringBuilder sb = new StringBuilder(); |
| 3262 | if ( bold && reverse && blink && !underline ) { |
| 3263 | sb.append("\033[0;1;7;5;"); |
| 3264 | } else if ( bold && reverse && !blink && !underline ) { |
| 3265 | sb.append("\033[0;1;7;"); |
| 3266 | } else if ( !bold && reverse && blink && !underline ) { |
| 3267 | sb.append("\033[0;7;5;"); |
| 3268 | } else if ( bold && !reverse && blink && !underline ) { |
| 3269 | sb.append("\033[0;1;5;"); |
| 3270 | } else if ( bold && !reverse && !blink && !underline ) { |
| 3271 | sb.append("\033[0;1;"); |
| 3272 | } else if ( !bold && reverse && !blink && !underline ) { |
| 3273 | sb.append("\033[0;7;"); |
| 3274 | } else if ( !bold && !reverse && blink && !underline) { |
| 3275 | sb.append("\033[0;5;"); |
| 3276 | } else if ( bold && reverse && blink && underline ) { |
| 3277 | sb.append("\033[0;1;7;5;4;"); |
| 3278 | } else if ( bold && reverse && !blink && underline ) { |
| 3279 | sb.append("\033[0;1;7;4;"); |
| 3280 | } else if ( !bold && reverse && blink && underline ) { |
| 3281 | sb.append("\033[0;7;5;4;"); |
| 3282 | } else if ( bold && !reverse && blink && underline ) { |
| 3283 | sb.append("\033[0;1;5;4;"); |
| 3284 | } else if ( bold && !reverse && !blink && underline ) { |
| 3285 | sb.append("\033[0;1;4;"); |
| 3286 | } else if ( !bold && reverse && !blink && underline ) { |
| 3287 | sb.append("\033[0;7;4;"); |
| 3288 | } else if ( !bold && !reverse && blink && underline) { |
| 3289 | sb.append("\033[0;5;4;"); |
| 3290 | } else if ( !bold && !reverse && !blink && underline) { |
| 3291 | sb.append("\033[0;4;"); |
| 3292 | } else { |
| 3293 | assert (!bold && !reverse && !blink && !underline); |
| 3294 | sb.append("\033[0;"); |
| 3295 | } |
| 3296 | |
| 3297 | sb.append("m\033[38;2;"); |
| 3298 | sb.append(String.format("%d;%d;%d", foreColorRed, foreColorGreen, |
| 3299 | foreColorBlue)); |
| 3300 | sb.append("m\033[48;2;"); |
| 3301 | sb.append(String.format("%d;%d;%d", backColorRed, backColorGreen, |
| 3302 | backColorBlue)); |
| 3303 | sb.append("m"); |
| 3304 | return sb.toString(); |
| 3305 | } |
| 3306 | |
| 3307 | /** |
| 3308 | * Create a SGR parameter sequence to reset to defaults. |
| 3309 | * |
| 3310 | * @return the string to emit to an ANSI / ECMA-style terminal, |
| 3311 | * e.g. "\033[0m" |
| 3312 | */ |
| 3313 | private String normal() { |
| 3314 | return normal(true) + rgbColor(false, Color.WHITE, Color.BLACK); |
| 3315 | } |
| 3316 | |
| 3317 | /** |
| 3318 | * Create a SGR parameter sequence to reset to defaults. |
| 3319 | * |
| 3320 | * @param header if true, make the full header, otherwise just emit the |
| 3321 | * bare parameter e.g. "0;" |
| 3322 | * @return the string to emit to an ANSI / ECMA-style terminal, |
| 3323 | * e.g. "\033[0m" |
| 3324 | */ |
| 3325 | private String normal(final boolean header) { |
| 3326 | if (header) { |
| 3327 | return "\033[0;37;40m"; |
| 3328 | } |
| 3329 | return "0;37;40"; |
| 3330 | } |
| 3331 | |
| 3332 | /** |
| 3333 | * Create a SGR parameter sequence for enabling the visible cursor. |
| 3334 | * |
| 3335 | * @param on if true, turn on cursor |
| 3336 | * @return the string to emit to an ANSI / ECMA-style terminal |
| 3337 | */ |
| 3338 | private String cursor(final boolean on) { |
| 3339 | if (on && !cursorOn) { |
| 3340 | cursorOn = true; |
| 3341 | return "\033[?25h"; |
| 3342 | } |
| 3343 | if (!on && cursorOn) { |
| 3344 | cursorOn = false; |
| 3345 | return "\033[?25l"; |
| 3346 | } |
| 3347 | return ""; |
| 3348 | } |
| 3349 | |
| 3350 | /** |
| 3351 | * Clear the entire screen. Because some terminals use back-color-erase, |
| 3352 | * set the color to white-on-black beforehand. |
| 3353 | * |
| 3354 | * @return the string to emit to an ANSI / ECMA-style terminal |
| 3355 | */ |
| 3356 | private String clearAll() { |
| 3357 | return "\033[0;37;40m\033[2J"; |
| 3358 | } |
| 3359 | |
| 3360 | /** |
| 3361 | * Clear the line from the cursor (inclusive) to the end of the screen. |
| 3362 | * Because some terminals use back-color-erase, set the color to |
| 3363 | * white-on-black beforehand. |
| 3364 | * |
| 3365 | * @return the string to emit to an ANSI / ECMA-style terminal |
| 3366 | */ |
| 3367 | private String clearRemainingLine() { |
| 3368 | return "\033[0;37;40m\033[K"; |
| 3369 | } |
| 3370 | |
| 3371 | /** |
| 3372 | * Move the cursor to (x, y). |
| 3373 | * |
| 3374 | * @param x column coordinate. 0 is the left-most column. |
| 3375 | * @param y row coordinate. 0 is the top-most row. |
| 3376 | * @return the string to emit to an ANSI / ECMA-style terminal |
| 3377 | */ |
| 3378 | private String gotoXY(final int x, final int y) { |
| 3379 | return String.format("\033[%d;%dH", y + 1, x + 1); |
| 3380 | } |
| 3381 | |
| 3382 | /** |
| 3383 | * Tell (u)xterm that we want to receive mouse events based on "Any event |
| 3384 | * tracking", UTF-8 coordinates, and then SGR coordinates. Ideally we |
| 3385 | * will end up with SGR coordinates with UTF-8 coordinates as a fallback. |
| 3386 | * See |
| 3387 | * http://invisible-island.net/xterm/ctlseqs/ctlseqs.html#Mouse%20Tracking |
| 3388 | * |
| 3389 | * Note that this also sets the alternate/primary screen buffer. |
| 3390 | * |
| 3391 | * @param on If true, enable mouse report and use the alternate screen |
| 3392 | * buffer. If false disable mouse reporting and use the primary screen |
| 3393 | * buffer. |
| 3394 | * @return the string to emit to xterm |
| 3395 | */ |
| 3396 | private String mouse(final boolean on) { |
| 3397 | if (on) { |
| 3398 | return "\033[?1002;1003;1005;1006h\033[?1049h"; |
| 3399 | } |
| 3400 | return "\033[?1002;1003;1006;1005l\033[?1049l"; |
| 3401 | } |
| 3402 | |
| 3403 | } |