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annotate app/src/main/java/de/mud/terminal/VDUBuffer.java @ 483:84bab82d1f58
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| author | Carl Byington <carl@five-ten-sg.com> |
|---|---|
| date | Mon, 01 Jun 2020 15:47:47 -0700 |
| parents | d29cce60f393 |
| children |
| rev | line source |
|---|---|
| 0 | 1 /* |
| 2 * This file is part of "JTA - Telnet/SSH for the JAVA(tm) platform". | |
| 3 * | |
|
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4 * (c) Matthias L. Jugel, Marcus Meißner 1996-2005. All Rights Reserved. |
| 0 | 5 * |
| 6 * Please visit http://javatelnet.org/ for updates and contact. | |
| 7 * | |
| 8 * --LICENSE NOTICE-- | |
| 9 * This program is free software; you can redistribute it and/or | |
| 10 * modify it under the terms of the GNU General Public License | |
| 11 * as published by the Free Software Foundation; either version 2 | |
| 12 * of the License, or (at your option) any later version. | |
| 13 * | |
| 14 * This program is distributed in the hope that it will be useful, | |
| 15 * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
| 16 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
| 17 * GNU General Public License for more details. | |
| 18 * | |
| 19 * You should have received a copy of the GNU General Public License | |
| 20 * along with this program; if not, write to the Free Software | |
| 21 * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. | |
| 22 * --LICENSE NOTICE-- | |
| 23 * | |
| 24 */ | |
| 25 | |
| 26 package de.mud.terminal; | |
| 27 | |
| 28 import java.util.Arrays; | |
| 29 | |
| 30 /** | |
| 31 * Implementation of a Video Display Unit (VDU) buffer. This class contains | |
| 32 * all methods to manipulate the buffer that stores characters and their | |
| 33 * attributes as well as the regions displayed. | |
| 34 * | |
| 35 * @author Matthias L. Jugel, Marcus Meißner | |
| 36 * @version $Id: VDUBuffer.java 503 2005-10-24 07:34:13Z marcus $ | |
| 37 */ | |
| 38 public class VDUBuffer { | |
| 39 | |
|
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40 /** a generic display that should redraw on demand */ |
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41 protected VDUDisplay display; |
| 0 | 42 |
| 43 /** Enable debug messages. */ | |
| 44 public final static int debug = 0; | |
| 45 | |
| 46 public int height, width; /* rows and columns */ | |
| 47 public boolean[] update; /* contains the lines that need update */ | |
| 48 public char[][] charArray; /* contains the characters */ | |
| 49 public int[][] charAttributes; /* contains character attrs */ | |
| 50 public int bufSize; | |
| 51 public int maxBufSize; /* buffer sizes */ | |
| 52 public int screenBase; /* the actual screen start */ | |
| 53 public int windowBase; /* where the start displaying */ | |
| 54 public int scrollMarker; /* marks the last line inserted */ | |
| 55 | |
| 56 private int topMargin; /* top scroll margin */ | |
| 57 private int bottomMargin; /* bottom scroll margin */ | |
| 58 | |
| 59 // cursor variables | |
| 60 protected boolean showcursor = true; | |
| 61 protected int cursorX, cursorY; | |
| 62 | |
| 63 /** Scroll up when inserting a line. */ | |
| 64 public final static boolean SCROLL_UP = false; | |
| 65 /** Scroll down when inserting a line. */ | |
| 66 public final static boolean SCROLL_DOWN = true; | |
| 67 | |
| 68 /* Attributes bit-field usage: | |
| 69 * | |
| 70 * 8421 8421 8421 8421 8421 8421 8421 8421 | |
| 71 * |||| |||| |||| |||| |||| |||| |||| |||`- Bold | |
| 72 * |||| |||| |||| |||| |||| |||| |||| ||`-- Underline | |
| 73 * |||| |||| |||| |||| |||| |||| |||| |`--- Invert | |
| 74 * |||| |||| |||| |||| |||| |||| |||| `---- Low | |
| 75 * |||| |||| |||| |||| |||| |||| |||`------ Invisible | |
| 76 * |||| |||| |||| |||| ||`+-++++-+++------- Foreground Color | |
| 77 * |||| |||| |`++-++++-++------------------ Background Color | |
| 78 * |||| |||| `----------------------------- Fullwidth character | |
| 79 * `+++-++++------------------------------- Reserved for future use | |
| 80 */ | |
| 81 | |
| 82 /** Make character normal. */ | |
| 83 public final static int NORMAL = 0x00; | |
| 84 /** Make character bold. */ | |
| 85 public final static int BOLD = 0x01; | |
| 86 /** Underline character. */ | |
| 87 public final static int UNDERLINE = 0x02; | |
| 88 /** Invert character. */ | |
| 89 public final static int INVERT = 0x04; | |
| 90 /** Lower intensity character. */ | |
| 91 public final static int LOW = 0x08; | |
| 92 /** Invisible character. */ | |
| 93 public final static int INVISIBLE = 0x10; | |
| 94 /** Unicode full-width character (CJK, et al.) */ | |
| 95 public final static int FULLWIDTH = 0x8000000; | |
| 96 | |
| 97 /** how much to left shift the foreground color */ | |
| 98 public final static int COLOR_FG_SHIFT = 5; | |
| 99 /** how much to left shift the background color */ | |
| 100 public final static int COLOR_BG_SHIFT = 14; | |
| 101 /** color mask */ | |
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102 public final static int COLOR = 0x7fffe0; /* 0000 0000 0111 1111 1111 1111 1110 0000 */ |
| 0 | 103 /** foreground color mask */ |
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104 public final static int COLOR_FG = 0x003fe0; /* 0000 0000 0000 0000 0011 1111 1110 0000 */ |
| 0 | 105 /** background color mask */ |
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106 public final static int COLOR_BG = 0x7fc000; /* 0000 0000 0111 1111 1100 0000 0000 0000 */ |
| 0 | 107 |
| 108 /** | |
| 109 * Create a new video display buffer with the passed width and height in | |
| 110 * characters. | |
| 111 * @param width the length of the character lines | |
| 112 * @param height the amount of lines on the screen | |
| 113 */ | |
| 114 public VDUBuffer(int width, int height) { | |
| 115 // set the display screen size | |
| 116 setScreenSize(width, height, false); | |
| 117 } | |
| 118 | |
| 119 /** | |
| 120 * Create a standard video display buffer with 80 columns and 24 lines. | |
| 121 */ | |
| 122 public VDUBuffer() { | |
| 123 this(80, 24); | |
| 124 } | |
| 125 | |
| 126 /** | |
| 127 * Put a character on the screen with normal font and outline. | |
| 128 * The character previously on that position will be overwritten. | |
| 129 * You need to call redraw() to update the screen. | |
| 130 * @param c x-coordinate (column) | |
| 131 * @param l y-coordinate (line) | |
| 132 * @param ch the character to show on the screen | |
| 133 * @see #insertChar | |
| 134 * @see #deleteChar | |
| 135 * @see #redraw | |
| 136 */ | |
| 137 public void putChar(int c, int l, char ch) { | |
| 138 putChar(c, l, ch, NORMAL); | |
| 139 } | |
| 140 | |
| 141 /** | |
| 142 * Put a character on the screen with specific font and outline. | |
| 143 * The character previously on that position will be overwritten. | |
| 144 * You need to call redraw() to update the screen. | |
| 145 * @param c x-coordinate (column) | |
| 146 * @param l y-coordinate (line) | |
| 147 * @param ch the character to show on the screen | |
| 148 * @param attributes the character attributes | |
| 149 * @see #BOLD | |
| 150 * @see #UNDERLINE | |
| 151 * @see #INVERT | |
| 152 * @see #INVISIBLE | |
| 153 * @see #NORMAL | |
| 154 * @see #LOW | |
| 155 * @see #insertChar | |
| 156 * @see #deleteChar | |
| 157 * @see #redraw | |
| 158 */ | |
| 159 | |
| 160 public void putChar(int c, int l, char ch, int attributes) { | |
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161 int ll = screenBase + l; |
| 307 | 162 |
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163 if ((ll >= bufSize) || (c >= width)) return; // ignore characters outside our buffer |
| 307 | 164 |
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165 charArray[ll][c] = ch; |
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166 charAttributes[ll][c] = attributes; |
| 0 | 167 |
| 168 if (l < height) | |
| 169 update[l + 1] = true; | |
| 170 } | |
| 171 | |
| 172 /** | |
| 173 * Get the character at the specified position. | |
| 174 * @param c x-coordinate (column) | |
| 175 * @param l y-coordinate (line) | |
| 176 * @see #putChar | |
| 177 */ | |
| 178 public char getChar(int c, int l) { | |
| 179 return charArray[screenBase + l][c]; | |
| 180 } | |
| 181 | |
| 182 /** | |
| 183 * Get the attributes for the specified position. | |
| 184 * @param c x-coordinate (column) | |
| 185 * @param l y-coordinate (line) | |
| 186 * @see #putChar | |
| 187 */ | |
| 188 public int getAttributes(int c, int l) { | |
| 189 return charAttributes[screenBase + l][c]; | |
| 190 } | |
| 191 | |
| 192 /** | |
| 193 * Insert a character at a specific position on the screen. | |
| 194 * All character right to from this position will be moved one to the right. | |
| 195 * You need to call redraw() to update the screen. | |
| 196 * @param c x-coordinate (column) | |
| 197 * @param l y-coordinate (line) | |
| 198 * @param ch the character to insert | |
| 199 * @param attributes the character attributes | |
| 200 * @see #BOLD | |
| 201 * @see #UNDERLINE | |
| 202 * @see #INVERT | |
| 203 * @see #INVISIBLE | |
| 204 * @see #NORMAL | |
| 205 * @see #LOW | |
| 206 * @see #putChar | |
| 207 * @see #deleteChar | |
| 208 * @see #redraw | |
| 209 */ | |
| 210 public void insertChar(int c, int l, char ch, int attributes) { | |
| 211 System.arraycopy(charArray[screenBase + l], c, | |
| 212 charArray[screenBase + l], c + 1, width - c - 1); | |
| 213 System.arraycopy(charAttributes[screenBase + l], c, | |
| 214 charAttributes[screenBase + l], c + 1, width - c - 1); | |
| 215 putChar(c, l, ch, attributes); | |
| 216 } | |
| 217 | |
| 218 /** | |
| 219 * Delete a character at a given position on the screen. | |
| 220 * All characters right to the position will be moved one to the left. | |
| 221 * You need to call redraw() to update the screen. | |
| 222 * @param c x-coordinate (column) | |
| 223 * @param l y-coordinate (line) | |
| 224 * @see #putChar | |
| 225 * @see #insertChar | |
| 226 * @see #redraw | |
| 227 */ | |
| 228 public void deleteChar(int c, int l) { | |
| 229 if (c < width - 1) { | |
| 230 System.arraycopy(charArray[screenBase + l], c + 1, | |
| 231 charArray[screenBase + l], c, width - c - 1); | |
| 232 System.arraycopy(charAttributes[screenBase + l], c + 1, | |
| 233 charAttributes[screenBase + l], c, width - c - 1); | |
| 234 } | |
| 235 | |
| 236 putChar(width - 1, l, (char) 0); | |
| 237 } | |
| 238 | |
| 239 /** | |
| 240 * Put a String at a specific position. Any characters previously on that | |
| 241 * position will be overwritten. You need to call redraw() for screen update. | |
| 242 * @param c x-coordinate (column) | |
| 243 * @param l y-coordinate (line) | |
| 244 * @param s the string to be shown on the screen | |
| 245 * @see #BOLD | |
| 246 * @see #UNDERLINE | |
| 247 * @see #INVERT | |
| 248 * @see #INVISIBLE | |
| 249 * @see #NORMAL | |
| 250 * @see #LOW | |
| 251 * @see #putChar | |
| 252 * @see #insertLine | |
| 253 * @see #deleteLine | |
| 254 * @see #redraw | |
| 255 */ | |
| 256 public void putString(int c, int l, String s) { | |
| 257 putString(c, l, s, NORMAL); | |
| 258 } | |
| 259 | |
| 260 /** | |
| 261 * Put a String at a specific position giving all characters the same | |
| 262 * attributes. Any characters previously on that position will be | |
| 263 * overwritten. You need to call redraw() to update the screen. | |
| 264 * @param c x-coordinate (column) | |
| 265 * @param l y-coordinate (line) | |
| 266 * @param s the string to be shown on the screen | |
| 267 * @param attributes character attributes | |
| 268 * @see #BOLD | |
| 269 * @see #UNDERLINE | |
| 270 * @see #INVERT | |
| 271 * @see #INVISIBLE | |
| 272 * @see #NORMAL | |
| 273 * @see #LOW | |
| 274 * @see #putChar | |
| 275 * @see #insertLine | |
| 276 * @see #deleteLine | |
| 277 * @see #redraw | |
| 278 */ | |
| 279 public void putString(int c, int l, String s, int attributes) { | |
| 280 for (int i = 0; i < s.length() && c + i < width; i++) | |
| 281 putChar(c + i, l, s.charAt(i), attributes); | |
| 282 } | |
| 283 | |
| 284 /** | |
| 285 * Insert a blank line at a specific position. | |
| 286 * The current line and all previous lines are scrolled one line up. The | |
| 287 * top line is lost. You need to call redraw() to update the screen. | |
| 288 * @param l the y-coordinate to insert the line | |
| 289 * @see #deleteLine | |
| 290 * @see #redraw | |
| 291 */ | |
| 292 public void insertLine(int l) { | |
| 293 insertLine(l, 1, SCROLL_UP); | |
| 294 } | |
| 295 | |
| 296 /** | |
| 297 * Insert blank lines at a specific position. | |
| 298 * You need to call redraw() to update the screen | |
| 299 * @param l the y-coordinate to insert the line | |
| 300 * @param n amount of lines to be inserted | |
| 301 * @see #deleteLine | |
| 302 * @see #redraw | |
| 303 */ | |
| 304 public void insertLine(int l, int n) { | |
| 305 insertLine(l, n, SCROLL_UP); | |
| 306 } | |
| 307 | |
| 308 /** | |
| 309 * Insert a blank line at a specific position. Scroll text according to | |
| 310 * the argument. | |
| 311 * You need to call redraw() to update the screen | |
| 312 * @param l the y-coordinate to insert the line | |
| 313 * @param scrollDown scroll down | |
| 314 * @see #deleteLine | |
| 315 * @see #SCROLL_UP | |
| 316 * @see #SCROLL_DOWN | |
| 317 * @see #redraw | |
| 318 */ | |
| 319 public void insertLine(int l, boolean scrollDown) { | |
| 320 insertLine(l, 1, scrollDown); | |
| 321 } | |
| 322 | |
| 323 /** | |
| 324 * Insert blank lines at a specific position. | |
| 325 * The current line and all previous lines are scrolled one line up. The | |
| 326 * top line is lost. You need to call redraw() to update the screen. | |
| 327 * @param l the y-coordinate to insert the line | |
| 328 * @param n number of lines to be inserted | |
| 329 * @param scrollDown scroll down | |
| 330 * @see #deleteLine | |
| 331 * @see #SCROLL_UP | |
| 332 * @see #SCROLL_DOWN | |
| 333 * @see #redraw | |
| 334 */ | |
| 335 | |
| 336 public synchronized void insertLine(int l, int n, boolean scrollDown) { | |
| 337 char cbuf[][] = null; | |
| 338 int abuf[][] = null; | |
| 339 int offset = 0; | |
| 340 int oldBase = screenBase; | |
| 341 int newScreenBase = screenBase; | |
| 342 int newWindowBase = windowBase; | |
| 343 int newBufSize = bufSize; | |
| 344 | |
| 345 if (l > bottomMargin) /* We do not scroll below bottom margin (below the scrolling region). */ | |
| 346 return; | |
| 347 | |
| 348 int top = (l < topMargin ? | |
| 349 0 : (l > bottomMargin ? | |
| 350 (bottomMargin + 1 < height ? | |
| 351 bottomMargin + 1 : height - 1) : topMargin)); | |
| 352 int bottom = (l > bottomMargin ? | |
| 353 height - 1 : (l < topMargin ? | |
| 354 (topMargin > 0 ? | |
| 355 topMargin - 1 : 0) : bottomMargin)); | |
| 356 | |
| 357 // System.out.println("l is "+l+", top is "+top+", bottom is "+bottom+", bottomargin is "+bottomMargin+", topMargin is "+topMargin); | |
| 358 if (scrollDown) { | |
| 359 if (n > (bottom - top)) n = (bottom - top); | |
| 360 | |
| 361 int size = bottom - l - (n - 1); | |
| 362 | |
| 363 if (size < 0) size = 0; | |
| 364 | |
| 365 cbuf = new char[size][]; | |
| 366 abuf = new int[size][]; | |
| 367 System.arraycopy(charArray, oldBase + l, cbuf, 0, bottom - l - (n - 1)); | |
| 368 System.arraycopy(charAttributes, oldBase + l, | |
| 369 abuf, 0, bottom - l - (n - 1)); | |
| 370 System.arraycopy(cbuf, 0, charArray, oldBase + l + n, | |
| 371 bottom - l - (n - 1)); | |
| 372 System.arraycopy(abuf, 0, charAttributes, oldBase + l + n, | |
| 373 bottom - l - (n - 1)); | |
| 374 cbuf = charArray; | |
| 375 abuf = charAttributes; | |
| 376 } | |
| 377 else { | |
| 378 try { | |
| 379 if (n > (bottom - top) + 1) n = (bottom - top) + 1; | |
| 380 | |
| 381 if (bufSize < maxBufSize) { | |
| 382 if (bufSize + n > maxBufSize) { | |
| 383 offset = n - (maxBufSize - bufSize); | |
| 384 scrollMarker += offset; | |
| 385 newBufSize = maxBufSize; | |
| 386 newScreenBase = maxBufSize - height - 1; | |
| 387 newWindowBase = screenBase; | |
| 388 } | |
| 389 else { | |
| 390 scrollMarker += n; | |
| 391 newScreenBase += n; | |
| 392 newWindowBase += n; | |
| 393 newBufSize += n; | |
| 394 } | |
| 395 | |
| 396 cbuf = new char[newBufSize][]; | |
| 397 abuf = new int[newBufSize][]; | |
| 398 } | |
| 399 else { | |
| 400 offset = n; | |
| 401 cbuf = charArray; | |
| 402 abuf = charAttributes; | |
| 403 } | |
| 404 | |
| 405 // copy anything from the top of the buffer (+offset) to the new top | |
| 406 // up to the screenBase. | |
| 407 if (oldBase > 0) { | |
| 408 System.arraycopy(charArray, offset, | |
| 409 cbuf, 0, | |
| 410 oldBase - offset); | |
| 411 System.arraycopy(charAttributes, offset, | |
| 412 abuf, 0, | |
| 413 oldBase - offset); | |
| 414 } | |
| 415 | |
| 416 // copy anything from the top of the screen (screenBase) up to the | |
| 417 // topMargin to the new screen | |
| 418 if (top > 0) { | |
| 419 System.arraycopy(charArray, oldBase, | |
| 420 cbuf, newScreenBase, | |
| 421 top); | |
| 422 System.arraycopy(charAttributes, oldBase, | |
| 423 abuf, newScreenBase, | |
| 424 top); | |
| 425 } | |
| 426 | |
| 427 // copy anything from the topMargin up to the amount of lines inserted | |
| 428 // to the gap left over between scrollback buffer and screenBase | |
| 429 if (oldBase >= 0) { | |
| 430 System.arraycopy(charArray, oldBase + top, | |
| 431 cbuf, oldBase - offset, | |
| 432 n); | |
| 433 System.arraycopy(charAttributes, oldBase + top, | |
| 434 abuf, oldBase - offset, | |
| 435 n); | |
| 436 } | |
| 437 | |
| 438 // copy anything from topMargin + n up to the line linserted to the | |
| 439 // topMargin | |
| 440 System.arraycopy(charArray, oldBase + top + n, | |
| 441 cbuf, newScreenBase + top, | |
| 442 l - top - (n - 1)); | |
| 443 System.arraycopy(charAttributes, oldBase + top + n, | |
| 444 abuf, newScreenBase + top, | |
| 445 l - top - (n - 1)); | |
| 446 | |
| 447 // | |
| 448 // copy the all lines next to the inserted to the new buffer | |
| 449 if (l < height - 1) { | |
| 450 System.arraycopy(charArray, oldBase + l + 1, | |
| 451 cbuf, newScreenBase + l + 1, | |
| 452 (height - 1) - l); | |
| 453 System.arraycopy(charAttributes, oldBase + l + 1, | |
| 454 abuf, newScreenBase + l + 1, | |
| 455 (height - 1) - l); | |
| 456 } | |
| 457 } | |
| 458 catch (ArrayIndexOutOfBoundsException e) { | |
| 459 // this should not happen anymore, but I will leave the code | |
| 460 // here in case something happens anyway. That code above is | |
| 461 // so complex I always have a hard time understanding what | |
| 462 // I did, even though there are comments | |
| 463 System.err.println("*** Error while scrolling up:"); | |
| 464 System.err.println("--- BEGIN STACK TRACE ---"); | |
| 465 e.printStackTrace(); | |
| 466 System.err.println("--- END STACK TRACE ---"); | |
| 467 System.err.println("bufSize=" + bufSize + ", maxBufSize=" + maxBufSize); | |
| 468 System.err.println("top=" + top + ", bottom=" + bottom); | |
| 469 System.err.println("n=" + n + ", l=" + l); | |
| 470 System.err.println("screenBase=" + screenBase + ", windowBase=" + windowBase); | |
| 471 System.err.println("newScreenBase=" + newScreenBase + ", newWindowBase=" + newWindowBase); | |
| 472 System.err.println("oldBase=" + oldBase); | |
| 473 System.err.println("size.width=" + width + ", size.height=" + height); | |
| 474 System.err.println("abuf.length=" + abuf.length + ", cbuf.length=" + cbuf.length); | |
| 475 System.err.println("*** done dumping debug information"); | |
| 476 } | |
| 477 } | |
| 478 | |
| 479 // this is a little helper to mark the scrolling | |
| 480 scrollMarker -= n; | |
| 481 | |
| 482 for (int i = 0; i < n; i++) { | |
| 483 cbuf[(newScreenBase + l) + (scrollDown ? i : -i)] = new char[width]; | |
| 484 Arrays.fill(cbuf[(newScreenBase + l) + (scrollDown ? i : -i)], ' '); | |
| 485 abuf[(newScreenBase + l) + (scrollDown ? i : -i)] = new int[width]; | |
| 486 } | |
| 487 | |
| 488 charArray = cbuf; | |
| 489 charAttributes = abuf; | |
| 490 screenBase = newScreenBase; | |
| 491 windowBase = newWindowBase; | |
| 492 bufSize = newBufSize; | |
| 493 | |
| 494 if (scrollDown) | |
| 495 markLine(l, bottom - l + 1); | |
| 496 else | |
| 497 markLine(top, l - top + 1); | |
| 498 | |
| 499 display.updateScrollBar(); | |
| 500 } | |
| 501 | |
| 502 /** | |
| 503 * Delete a line at a specific position. Subsequent lines will be scrolled | |
| 504 * up to fill the space and a blank line is inserted at the end of the | |
| 505 * screen. | |
| 506 * @param l the y-coordinate to insert the line | |
| 507 * @see #deleteLine | |
| 508 */ | |
| 509 public void deleteLine(int l) { | |
| 510 int bottom = (l > bottomMargin ? height - 1 : | |
| 511 (l < topMargin ? topMargin : bottomMargin + 1)); | |
| 512 int numRows = bottom - l - 1; | |
| 513 char[] discardedChars = charArray[screenBase + l]; | |
| 514 int[] discardedAttributes = charAttributes[screenBase + l]; | |
| 515 | |
| 516 if (numRows > 0) { | |
| 517 System.arraycopy(charArray, screenBase + l + 1, | |
| 518 charArray, screenBase + l, numRows); | |
| 519 System.arraycopy(charAttributes, screenBase + l + 1, | |
| 520 charAttributes, screenBase + l, numRows); | |
| 521 } | |
| 522 | |
| 523 int newBottomRow = screenBase + bottom - 1; | |
| 524 charArray[newBottomRow] = discardedChars; | |
| 525 charAttributes[newBottomRow] = discardedAttributes; | |
| 526 Arrays.fill(charArray[newBottomRow], ' '); | |
| 527 Arrays.fill(charAttributes[newBottomRow], 0); | |
| 528 markLine(l, bottom - l); | |
| 529 } | |
| 530 | |
| 531 /** | |
| 532 * Delete a rectangular portion of the screen. | |
| 533 * You need to call redraw() to update the screen. | |
| 534 * @param c x-coordinate (column) | |
| 535 * @param l y-coordinate (row) | |
| 536 * @param w with of the area in characters | |
| 537 * @param h height of the area in characters | |
| 538 * @param curAttr attribute to fill | |
| 539 * @see #deleteChar | |
| 540 * @see #deleteLine | |
| 541 * @see #redraw | |
| 542 */ | |
| 543 public void deleteArea(int c, int l, int w, int h, int curAttr) { | |
| 544 int endColumn = c + w; | |
| 545 int targetRow = screenBase + l; | |
| 546 | |
| 547 for (int i = 0; i < h && l + i < height; i++) { | |
| 548 Arrays.fill(charAttributes[targetRow], c, endColumn, curAttr); | |
| 549 Arrays.fill(charArray[targetRow], c, endColumn, ' '); | |
| 550 targetRow++; | |
| 551 } | |
| 552 | |
| 553 markLine(l, h); | |
| 554 } | |
| 555 | |
| 556 /** | |
| 557 * Delete a rectangular portion of the screen. | |
| 558 * You need to call redraw() to update the screen. | |
| 559 * @param c x-coordinate (column) | |
| 560 * @param l y-coordinate (row) | |
| 561 * @param w with of the area in characters | |
| 562 * @param h height of the area in characters | |
| 563 * @see #deleteChar | |
| 564 * @see #deleteLine | |
| 565 * @see #redraw | |
| 566 */ | |
| 567 public void deleteArea(int c, int l, int w, int h) { | |
| 568 deleteArea(c, l, w, h, 0); | |
| 569 } | |
| 570 | |
| 571 /** | |
| 572 * Sets whether the cursor is visible or not. | |
| 573 * @param doshow | |
| 574 */ | |
| 575 public void showCursor(boolean doshow) { | |
| 576 showcursor = doshow; | |
| 577 } | |
| 578 | |
| 579 /** | |
| 580 * Check whether the cursor is currently visible. | |
| 581 * @return visibility | |
| 582 */ | |
| 583 public boolean isCursorVisible() { | |
| 584 return showcursor; | |
| 585 } | |
| 586 | |
| 587 /** | |
| 588 * Puts the cursor at the specified position. | |
| 589 * @param c column | |
| 590 * @param l line | |
| 591 */ | |
| 592 public void setCursorPosition(int c, int l) { | |
| 307 | 593 cursorX = (c > width - 1) ? width - 1 : c; |
| 594 cursorY = (l > height - 1) ? height - 1 : l; | |
| 0 | 595 } |
| 596 | |
| 597 /** | |
| 598 * Get the current column of the cursor position. | |
| 599 */ | |
| 600 public int getCursorColumn() { | |
| 601 return cursorX; | |
| 602 } | |
| 603 | |
| 604 /** | |
| 605 * Get the current line of the cursor position. | |
| 606 */ | |
| 607 public int getCursorRow() { | |
| 608 return cursorY; | |
| 609 } | |
| 610 | |
| 611 /** | |
| 612 * Set the current window base. This allows to view the scrollback buffer. | |
| 613 * @param line the line where the screen window starts | |
| 614 * @see #setBufferSize | |
| 615 * @see #getBufferSize | |
| 616 */ | |
| 617 public void setWindowBase(int line) { | |
| 618 if (line > screenBase) | |
| 619 line = screenBase; | |
| 620 else if (line < 0) line = 0; | |
| 621 | |
| 622 windowBase = line; | |
| 623 update[0] = true; | |
| 624 redraw(); | |
| 625 } | |
| 626 | |
| 627 /** | |
| 628 * Get the current window base. | |
| 629 * @see #setWindowBase | |
| 630 */ | |
| 631 public int getWindowBase() { | |
| 632 return windowBase; | |
| 633 } | |
| 634 | |
| 635 /** | |
| 636 * Set the scroll margins simultaneously. If they're out of bounds, trim them. | |
| 637 * @param l1 line that is the top | |
| 638 * @param l2 line that is the bottom | |
| 639 */ | |
| 640 public void setMargins(int l1, int l2) { | |
| 641 if (l1 > l2) | |
| 642 return; | |
| 643 | |
| 644 if (l1 < 0) | |
| 645 l1 = 0; | |
| 646 | |
| 647 if (l2 >= height) | |
| 648 l2 = height - 1; | |
| 649 | |
| 650 topMargin = l1; | |
| 651 bottomMargin = l2; | |
| 652 } | |
| 653 | |
| 654 /** | |
| 655 * Set the top scroll margin for the screen. If the current bottom margin | |
| 656 * is smaller it will become the top margin and the line will become the | |
| 657 * bottom margin. | |
| 658 * @param l line that is the margin | |
| 659 */ | |
| 660 public void setTopMargin(int l) { | |
| 661 if (l > bottomMargin) { | |
| 662 topMargin = bottomMargin; | |
| 663 bottomMargin = l; | |
| 664 } | |
| 665 else | |
| 666 topMargin = l; | |
| 667 | |
| 668 if (topMargin < 0) topMargin = 0; | |
| 669 | |
| 670 if (bottomMargin >= height) bottomMargin = height - 1; | |
| 671 } | |
| 672 | |
| 673 /** | |
| 674 * Get the top scroll margin. | |
| 675 */ | |
| 676 public int getTopMargin() { | |
| 677 return topMargin; | |
| 678 } | |
| 679 | |
| 680 /** | |
| 681 * Set the bottom scroll margin for the screen. If the current top margin | |
| 682 * is bigger it will become the bottom margin and the line will become the | |
| 683 * top margin. | |
| 684 * @param l line that is the margin | |
| 685 */ | |
| 686 public void setBottomMargin(int l) { | |
| 687 if (l < topMargin) { | |
| 688 bottomMargin = topMargin; | |
| 689 topMargin = l; | |
| 690 } | |
| 691 else | |
| 692 bottomMargin = l; | |
| 693 | |
| 694 if (topMargin < 0) topMargin = 0; | |
| 695 | |
| 696 if (bottomMargin >= height) bottomMargin = height - 1; | |
| 697 } | |
| 698 | |
| 699 /** | |
| 700 * Get the bottom scroll margin. | |
| 701 */ | |
| 702 public int getBottomMargin() { | |
| 703 return bottomMargin; | |
| 704 } | |
| 705 | |
| 706 /** | |
| 707 * Set scrollback buffer size. | |
| 708 * @param amount new size of the buffer | |
| 709 */ | |
| 710 public void setBufferSize(int amount) { | |
| 711 if (amount < height) amount = height; | |
| 712 | |
| 713 if (amount < maxBufSize) { | |
| 714 char cbuf[][] = new char[amount][width]; | |
| 715 int abuf[][] = new int[amount][width]; | |
| 716 int copyStart = bufSize - amount < 0 ? 0 : bufSize - amount; | |
| 717 int copyCount = bufSize - amount < 0 ? bufSize : amount; | |
| 718 | |
| 719 if (charArray != null) | |
| 720 System.arraycopy(charArray, copyStart, cbuf, 0, copyCount); | |
| 721 | |
| 722 if (charAttributes != null) | |
| 723 System.arraycopy(charAttributes, copyStart, abuf, 0, copyCount); | |
| 724 | |
| 725 charArray = cbuf; | |
| 726 charAttributes = abuf; | |
| 727 bufSize = copyCount; | |
| 728 screenBase = bufSize - height; | |
| 729 windowBase = screenBase; | |
| 730 } | |
| 731 | |
| 732 maxBufSize = amount; | |
| 733 update[0] = true; | |
| 734 redraw(); | |
| 735 } | |
| 736 | |
| 737 /** | |
| 738 * Retrieve current scrollback buffer size. | |
| 739 * @see #setBufferSize | |
| 740 */ | |
| 741 public int getBufferSize() { | |
| 742 return bufSize; | |
| 743 } | |
| 744 | |
| 745 /** | |
| 746 * Retrieve maximum buffer Size. | |
| 747 * @see #getBufferSize | |
| 748 */ | |
| 749 public int getMaxBufferSize() { | |
| 750 return maxBufSize; | |
| 751 } | |
| 752 | |
| 753 /** | |
| 754 * Change the size of the screen. This will include adjustment of the | |
| 755 * scrollback buffer. | |
| 756 * @param w of the screen | |
| 757 * @param h of the screen | |
| 758 */ | |
| 759 public void setScreenSize(int w, int h, boolean broadcast) { | |
| 760 char cbuf[][]; | |
| 761 int abuf[][]; | |
| 762 int maxSize = bufSize; | |
| 763 | |
| 764 if (w < 1 || h < 1) return; | |
| 765 | |
| 766 if (debug > 0) | |
| 767 System.err.println("VDU: screen size [" + w + "," + h + "]"); | |
| 768 | |
| 769 if (h > maxBufSize) | |
| 770 maxBufSize = h; | |
| 771 | |
| 772 if (h > bufSize) { | |
| 773 bufSize = h; | |
| 774 screenBase = 0; | |
| 775 windowBase = 0; | |
| 776 } | |
| 777 | |
| 778 if (windowBase + h >= bufSize) | |
| 779 windowBase = bufSize - h; | |
| 780 | |
| 781 if (screenBase + h >= bufSize) | |
| 782 screenBase = bufSize - h; | |
| 783 | |
| 784 cbuf = new char[bufSize][w]; | |
| 785 abuf = new int[bufSize][w]; | |
| 786 | |
| 787 for (int i = 0; i < bufSize; i++) { | |
| 788 Arrays.fill(cbuf[i], ' '); | |
| 789 } | |
| 790 | |
| 791 if (bufSize < maxSize) | |
| 792 maxSize = bufSize; | |
| 793 | |
| 794 int rowLength; | |
| 795 | |
| 796 if (charArray != null && charAttributes != null) { | |
| 797 for (int i = 0; i < maxSize && charArray[i] != null; i++) { | |
| 798 rowLength = charArray[i].length; | |
| 799 System.arraycopy(charArray[i], 0, cbuf[i], 0, | |
| 800 w < rowLength ? w : rowLength); | |
| 801 System.arraycopy(charAttributes[i], 0, abuf[i], 0, | |
| 802 w < rowLength ? w : rowLength); | |
| 803 } | |
| 804 } | |
| 805 | |
| 806 int C = getCursorColumn(); | |
| 807 | |
| 808 if (C < 0) | |
| 809 C = 0; | |
| 810 else if (C >= width) | |
| 811 C = width - 1; | |
| 812 | |
| 813 int R = getCursorRow(); | |
| 814 | |
| 815 if (R < 0) | |
| 816 R = 0; | |
| 817 else if (R >= height) | |
| 818 R = height - 1; | |
| 819 | |
| 820 setCursorPosition(C, R); | |
| 821 charArray = cbuf; | |
| 822 charAttributes = abuf; | |
| 823 width = w; | |
| 824 height = h; | |
| 825 topMargin = 0; | |
| 826 bottomMargin = h - 1; | |
| 827 update = new boolean[h + 1]; | |
| 828 update[0] = true; | |
| 829 /* FIXME: ??? | |
| 830 if(resizeStrategy == RESIZE_FONT) | |
| 831 setBounds(getBounds()); | |
| 832 */ | |
| 833 } | |
| 834 | |
| 835 /** | |
| 836 * Get amount of rows on the screen. | |
| 837 */ | |
| 838 public int getRows() { | |
| 839 return height; | |
| 840 } | |
| 841 | |
| 842 /** | |
| 843 * Get amount of columns on the screen. | |
| 844 */ | |
| 845 public int getColumns() { | |
| 846 return width; | |
| 847 } | |
| 848 | |
| 849 /** | |
| 850 * Mark lines to be updated with redraw(). | |
| 851 * @param l starting line | |
| 852 * @param n amount of lines to be updated | |
| 853 * @see #redraw | |
| 854 */ | |
| 855 public void markLine(int l, int n) { | |
| 856 for (int i = 0; (i < n) && (l + i < height); i++) | |
| 857 update[l + i + 1] = true; | |
| 858 } | |
| 859 | |
| 860 // private static int checkBounds(int value, int lower, int upper) { | |
| 861 // if (value < lower) | |
| 862 // return lower; | |
| 863 // else if (value > upper) | |
| 864 // return upper; | |
| 865 // else | |
| 866 // return value; | |
| 867 // } | |
| 868 | |
| 869 public void setDisplay(VDUDisplay display) { | |
| 870 this.display = display; | |
| 871 } | |
| 872 | |
| 873 /** | |
| 874 * Trigger a redraw on the display. | |
| 875 */ | |
| 876 protected void redraw() { | |
| 877 if (display != null) | |
| 878 display.redraw(); | |
| 879 } | |
| 880 } |