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annotate src/de/mud/terminal/VDUBuffer.java @ 255:67f9a819157e
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| author | Carl Byington <carl@five-ten-sg.com> |
|---|---|
| date | Mon, 14 Jul 2014 13:02:34 -0700 |
| parents | 6eab98e58bed |
| children | 071eccdff8ea |
| 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; |
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162 if ((ll >= bufSize) || (c >= width)) return; // ignore characters outside our buffer |
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163 charArray[ll][c] = ch; |
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164 charAttributes[ll][c] = attributes; |
| 0 | 165 |
| 166 if (l < height) | |
| 167 update[l + 1] = true; | |
| 168 } | |
| 169 | |
| 170 /** | |
| 171 * Get the character at the specified position. | |
| 172 * @param c x-coordinate (column) | |
| 173 * @param l y-coordinate (line) | |
| 174 * @see #putChar | |
| 175 */ | |
| 176 public char getChar(int c, int l) { | |
| 177 return charArray[screenBase + l][c]; | |
| 178 } | |
| 179 | |
| 180 /** | |
| 181 * Get the attributes for the specified position. | |
| 182 * @param c x-coordinate (column) | |
| 183 * @param l y-coordinate (line) | |
| 184 * @see #putChar | |
| 185 */ | |
| 186 public int getAttributes(int c, int l) { | |
| 187 return charAttributes[screenBase + l][c]; | |
| 188 } | |
| 189 | |
| 190 /** | |
| 191 * Insert a character at a specific position on the screen. | |
| 192 * All character right to from this position will be moved one to the right. | |
| 193 * You need to call redraw() to update the screen. | |
| 194 * @param c x-coordinate (column) | |
| 195 * @param l y-coordinate (line) | |
| 196 * @param ch the character to insert | |
| 197 * @param attributes the character attributes | |
| 198 * @see #BOLD | |
| 199 * @see #UNDERLINE | |
| 200 * @see #INVERT | |
| 201 * @see #INVISIBLE | |
| 202 * @see #NORMAL | |
| 203 * @see #LOW | |
| 204 * @see #putChar | |
| 205 * @see #deleteChar | |
| 206 * @see #redraw | |
| 207 */ | |
| 208 public void insertChar(int c, int l, char ch, int attributes) { | |
| 209 System.arraycopy(charArray[screenBase + l], c, | |
| 210 charArray[screenBase + l], c + 1, width - c - 1); | |
| 211 System.arraycopy(charAttributes[screenBase + l], c, | |
| 212 charAttributes[screenBase + l], c + 1, width - c - 1); | |
| 213 putChar(c, l, ch, attributes); | |
| 214 } | |
| 215 | |
| 216 /** | |
| 217 * Delete a character at a given position on the screen. | |
| 218 * All characters right to the position will be moved one to the left. | |
| 219 * You need to call redraw() to update the screen. | |
| 220 * @param c x-coordinate (column) | |
| 221 * @param l y-coordinate (line) | |
| 222 * @see #putChar | |
| 223 * @see #insertChar | |
| 224 * @see #redraw | |
| 225 */ | |
| 226 public void deleteChar(int c, int l) { | |
| 227 if (c < width - 1) { | |
| 228 System.arraycopy(charArray[screenBase + l], c + 1, | |
| 229 charArray[screenBase + l], c, width - c - 1); | |
| 230 System.arraycopy(charAttributes[screenBase + l], c + 1, | |
| 231 charAttributes[screenBase + l], c, width - c - 1); | |
| 232 } | |
| 233 | |
| 234 putChar(width - 1, l, (char) 0); | |
| 235 } | |
| 236 | |
| 237 /** | |
| 238 * Put a String at a specific position. Any characters previously on that | |
| 239 * position will be overwritten. You need to call redraw() for screen update. | |
| 240 * @param c x-coordinate (column) | |
| 241 * @param l y-coordinate (line) | |
| 242 * @param s the string to be shown on the screen | |
| 243 * @see #BOLD | |
| 244 * @see #UNDERLINE | |
| 245 * @see #INVERT | |
| 246 * @see #INVISIBLE | |
| 247 * @see #NORMAL | |
| 248 * @see #LOW | |
| 249 * @see #putChar | |
| 250 * @see #insertLine | |
| 251 * @see #deleteLine | |
| 252 * @see #redraw | |
| 253 */ | |
| 254 public void putString(int c, int l, String s) { | |
| 255 putString(c, l, s, NORMAL); | |
| 256 } | |
| 257 | |
| 258 /** | |
| 259 * Put a String at a specific position giving all characters the same | |
| 260 * attributes. Any characters previously on that position will be | |
| 261 * overwritten. You need to call redraw() to update the screen. | |
| 262 * @param c x-coordinate (column) | |
| 263 * @param l y-coordinate (line) | |
| 264 * @param s the string to be shown on the screen | |
| 265 * @param attributes character attributes | |
| 266 * @see #BOLD | |
| 267 * @see #UNDERLINE | |
| 268 * @see #INVERT | |
| 269 * @see #INVISIBLE | |
| 270 * @see #NORMAL | |
| 271 * @see #LOW | |
| 272 * @see #putChar | |
| 273 * @see #insertLine | |
| 274 * @see #deleteLine | |
| 275 * @see #redraw | |
| 276 */ | |
| 277 public void putString(int c, int l, String s, int attributes) { | |
| 278 for (int i = 0; i < s.length() && c + i < width; i++) | |
| 279 putChar(c + i, l, s.charAt(i), attributes); | |
| 280 } | |
| 281 | |
| 282 /** | |
| 283 * Insert a blank line at a specific position. | |
| 284 * The current line and all previous lines are scrolled one line up. The | |
| 285 * top line is lost. You need to call redraw() to update the screen. | |
| 286 * @param l the y-coordinate to insert the line | |
| 287 * @see #deleteLine | |
| 288 * @see #redraw | |
| 289 */ | |
| 290 public void insertLine(int l) { | |
| 291 insertLine(l, 1, SCROLL_UP); | |
| 292 } | |
| 293 | |
| 294 /** | |
| 295 * Insert blank lines at a specific position. | |
| 296 * You need to call redraw() to update the screen | |
| 297 * @param l the y-coordinate to insert the line | |
| 298 * @param n amount of lines to be inserted | |
| 299 * @see #deleteLine | |
| 300 * @see #redraw | |
| 301 */ | |
| 302 public void insertLine(int l, int n) { | |
| 303 insertLine(l, n, SCROLL_UP); | |
| 304 } | |
| 305 | |
| 306 /** | |
| 307 * Insert a blank line at a specific position. Scroll text according to | |
| 308 * the argument. | |
| 309 * You need to call redraw() to update the screen | |
| 310 * @param l the y-coordinate to insert the line | |
| 311 * @param scrollDown scroll down | |
| 312 * @see #deleteLine | |
| 313 * @see #SCROLL_UP | |
| 314 * @see #SCROLL_DOWN | |
| 315 * @see #redraw | |
| 316 */ | |
| 317 public void insertLine(int l, boolean scrollDown) { | |
| 318 insertLine(l, 1, scrollDown); | |
| 319 } | |
| 320 | |
| 321 /** | |
| 322 * Insert blank lines at a specific position. | |
| 323 * The current line and all previous lines are scrolled one line up. The | |
| 324 * top line is lost. You need to call redraw() to update the screen. | |
| 325 * @param l the y-coordinate to insert the line | |
| 326 * @param n number of lines to be inserted | |
| 327 * @param scrollDown scroll down | |
| 328 * @see #deleteLine | |
| 329 * @see #SCROLL_UP | |
| 330 * @see #SCROLL_DOWN | |
| 331 * @see #redraw | |
| 332 */ | |
| 333 | |
| 334 public synchronized void insertLine(int l, int n, boolean scrollDown) { | |
| 335 char cbuf[][] = null; | |
| 336 int abuf[][] = null; | |
| 337 int offset = 0; | |
| 338 int oldBase = screenBase; | |
| 339 int newScreenBase = screenBase; | |
| 340 int newWindowBase = windowBase; | |
| 341 int newBufSize = bufSize; | |
| 342 | |
| 343 if (l > bottomMargin) /* We do not scroll below bottom margin (below the scrolling region). */ | |
| 344 return; | |
| 345 | |
| 346 int top = (l < topMargin ? | |
| 347 0 : (l > bottomMargin ? | |
| 348 (bottomMargin + 1 < height ? | |
| 349 bottomMargin + 1 : height - 1) : topMargin)); | |
| 350 int bottom = (l > bottomMargin ? | |
| 351 height - 1 : (l < topMargin ? | |
| 352 (topMargin > 0 ? | |
| 353 topMargin - 1 : 0) : bottomMargin)); | |
| 354 | |
| 355 // System.out.println("l is "+l+", top is "+top+", bottom is "+bottom+", bottomargin is "+bottomMargin+", topMargin is "+topMargin); | |
| 356 if (scrollDown) { | |
| 357 if (n > (bottom - top)) n = (bottom - top); | |
| 358 | |
| 359 int size = bottom - l - (n - 1); | |
| 360 | |
| 361 if (size < 0) size = 0; | |
| 362 | |
| 363 cbuf = new char[size][]; | |
| 364 abuf = new int[size][]; | |
| 365 System.arraycopy(charArray, oldBase + l, cbuf, 0, bottom - l - (n - 1)); | |
| 366 System.arraycopy(charAttributes, oldBase + l, | |
| 367 abuf, 0, bottom - l - (n - 1)); | |
| 368 System.arraycopy(cbuf, 0, charArray, oldBase + l + n, | |
| 369 bottom - l - (n - 1)); | |
| 370 System.arraycopy(abuf, 0, charAttributes, oldBase + l + n, | |
| 371 bottom - l - (n - 1)); | |
| 372 cbuf = charArray; | |
| 373 abuf = charAttributes; | |
| 374 } | |
| 375 else { | |
| 376 try { | |
| 377 if (n > (bottom - top) + 1) n = (bottom - top) + 1; | |
| 378 | |
| 379 if (bufSize < maxBufSize) { | |
| 380 if (bufSize + n > maxBufSize) { | |
| 381 offset = n - (maxBufSize - bufSize); | |
| 382 scrollMarker += offset; | |
| 383 newBufSize = maxBufSize; | |
| 384 newScreenBase = maxBufSize - height - 1; | |
| 385 newWindowBase = screenBase; | |
| 386 } | |
| 387 else { | |
| 388 scrollMarker += n; | |
| 389 newScreenBase += n; | |
| 390 newWindowBase += n; | |
| 391 newBufSize += n; | |
| 392 } | |
| 393 | |
| 394 cbuf = new char[newBufSize][]; | |
| 395 abuf = new int[newBufSize][]; | |
| 396 } | |
| 397 else { | |
| 398 offset = n; | |
| 399 cbuf = charArray; | |
| 400 abuf = charAttributes; | |
| 401 } | |
| 402 | |
| 403 // copy anything from the top of the buffer (+offset) to the new top | |
| 404 // up to the screenBase. | |
| 405 if (oldBase > 0) { | |
| 406 System.arraycopy(charArray, offset, | |
| 407 cbuf, 0, | |
| 408 oldBase - offset); | |
| 409 System.arraycopy(charAttributes, offset, | |
| 410 abuf, 0, | |
| 411 oldBase - offset); | |
| 412 } | |
| 413 | |
| 414 // copy anything from the top of the screen (screenBase) up to the | |
| 415 // topMargin to the new screen | |
| 416 if (top > 0) { | |
| 417 System.arraycopy(charArray, oldBase, | |
| 418 cbuf, newScreenBase, | |
| 419 top); | |
| 420 System.arraycopy(charAttributes, oldBase, | |
| 421 abuf, newScreenBase, | |
| 422 top); | |
| 423 } | |
| 424 | |
| 425 // copy anything from the topMargin up to the amount of lines inserted | |
| 426 // to the gap left over between scrollback buffer and screenBase | |
| 427 if (oldBase >= 0) { | |
| 428 System.arraycopy(charArray, oldBase + top, | |
| 429 cbuf, oldBase - offset, | |
| 430 n); | |
| 431 System.arraycopy(charAttributes, oldBase + top, | |
| 432 abuf, oldBase - offset, | |
| 433 n); | |
| 434 } | |
| 435 | |
| 436 // copy anything from topMargin + n up to the line linserted to the | |
| 437 // topMargin | |
| 438 System.arraycopy(charArray, oldBase + top + n, | |
| 439 cbuf, newScreenBase + top, | |
| 440 l - top - (n - 1)); | |
| 441 System.arraycopy(charAttributes, oldBase + top + n, | |
| 442 abuf, newScreenBase + top, | |
| 443 l - top - (n - 1)); | |
| 444 | |
| 445 // | |
| 446 // copy the all lines next to the inserted to the new buffer | |
| 447 if (l < height - 1) { | |
| 448 System.arraycopy(charArray, oldBase + l + 1, | |
| 449 cbuf, newScreenBase + l + 1, | |
| 450 (height - 1) - l); | |
| 451 System.arraycopy(charAttributes, oldBase + l + 1, | |
| 452 abuf, newScreenBase + l + 1, | |
| 453 (height - 1) - l); | |
| 454 } | |
| 455 } | |
| 456 catch (ArrayIndexOutOfBoundsException e) { | |
| 457 // this should not happen anymore, but I will leave the code | |
| 458 // here in case something happens anyway. That code above is | |
| 459 // so complex I always have a hard time understanding what | |
| 460 // I did, even though there are comments | |
| 461 System.err.println("*** Error while scrolling up:"); | |
| 462 System.err.println("--- BEGIN STACK TRACE ---"); | |
| 463 e.printStackTrace(); | |
| 464 System.err.println("--- END STACK TRACE ---"); | |
| 465 System.err.println("bufSize=" + bufSize + ", maxBufSize=" + maxBufSize); | |
| 466 System.err.println("top=" + top + ", bottom=" + bottom); | |
| 467 System.err.println("n=" + n + ", l=" + l); | |
| 468 System.err.println("screenBase=" + screenBase + ", windowBase=" + windowBase); | |
| 469 System.err.println("newScreenBase=" + newScreenBase + ", newWindowBase=" + newWindowBase); | |
| 470 System.err.println("oldBase=" + oldBase); | |
| 471 System.err.println("size.width=" + width + ", size.height=" + height); | |
| 472 System.err.println("abuf.length=" + abuf.length + ", cbuf.length=" + cbuf.length); | |
| 473 System.err.println("*** done dumping debug information"); | |
| 474 } | |
| 475 } | |
| 476 | |
| 477 // this is a little helper to mark the scrolling | |
| 478 scrollMarker -= n; | |
| 479 | |
| 480 for (int i = 0; i < n; i++) { | |
| 481 cbuf[(newScreenBase + l) + (scrollDown ? i : -i)] = new char[width]; | |
| 482 Arrays.fill(cbuf[(newScreenBase + l) + (scrollDown ? i : -i)], ' '); | |
| 483 abuf[(newScreenBase + l) + (scrollDown ? i : -i)] = new int[width]; | |
| 484 } | |
| 485 | |
| 486 charArray = cbuf; | |
| 487 charAttributes = abuf; | |
| 488 screenBase = newScreenBase; | |
| 489 windowBase = newWindowBase; | |
| 490 bufSize = newBufSize; | |
| 491 | |
| 492 if (scrollDown) | |
| 493 markLine(l, bottom - l + 1); | |
| 494 else | |
| 495 markLine(top, l - top + 1); | |
| 496 | |
| 497 display.updateScrollBar(); | |
| 498 } | |
| 499 | |
| 500 /** | |
| 501 * Delete a line at a specific position. Subsequent lines will be scrolled | |
| 502 * up to fill the space and a blank line is inserted at the end of the | |
| 503 * screen. | |
| 504 * @param l the y-coordinate to insert the line | |
| 505 * @see #deleteLine | |
| 506 */ | |
| 507 public void deleteLine(int l) { | |
| 508 int bottom = (l > bottomMargin ? height - 1 : | |
| 509 (l < topMargin ? topMargin : bottomMargin + 1)); | |
| 510 int numRows = bottom - l - 1; | |
| 511 char[] discardedChars = charArray[screenBase + l]; | |
| 512 int[] discardedAttributes = charAttributes[screenBase + l]; | |
| 513 | |
| 514 if (numRows > 0) { | |
| 515 System.arraycopy(charArray, screenBase + l + 1, | |
| 516 charArray, screenBase + l, numRows); | |
| 517 System.arraycopy(charAttributes, screenBase + l + 1, | |
| 518 charAttributes, screenBase + l, numRows); | |
| 519 } | |
| 520 | |
| 521 int newBottomRow = screenBase + bottom - 1; | |
| 522 charArray[newBottomRow] = discardedChars; | |
| 523 charAttributes[newBottomRow] = discardedAttributes; | |
| 524 Arrays.fill(charArray[newBottomRow], ' '); | |
| 525 Arrays.fill(charAttributes[newBottomRow], 0); | |
| 526 markLine(l, bottom - l); | |
| 527 } | |
| 528 | |
| 529 /** | |
| 530 * Delete a rectangular portion of the screen. | |
| 531 * You need to call redraw() to update the screen. | |
| 532 * @param c x-coordinate (column) | |
| 533 * @param l y-coordinate (row) | |
| 534 * @param w with of the area in characters | |
| 535 * @param h height of the area in characters | |
| 536 * @param curAttr attribute to fill | |
| 537 * @see #deleteChar | |
| 538 * @see #deleteLine | |
| 539 * @see #redraw | |
| 540 */ | |
| 541 public void deleteArea(int c, int l, int w, int h, int curAttr) { | |
| 542 int endColumn = c + w; | |
| 543 int targetRow = screenBase + l; | |
| 544 | |
| 545 for (int i = 0; i < h && l + i < height; i++) { | |
| 546 Arrays.fill(charAttributes[targetRow], c, endColumn, curAttr); | |
| 547 Arrays.fill(charArray[targetRow], c, endColumn, ' '); | |
| 548 targetRow++; | |
| 549 } | |
| 550 | |
| 551 markLine(l, h); | |
| 552 } | |
| 553 | |
| 554 /** | |
| 555 * Delete a rectangular portion of the screen. | |
| 556 * You need to call redraw() to update the screen. | |
| 557 * @param c x-coordinate (column) | |
| 558 * @param l y-coordinate (row) | |
| 559 * @param w with of the area in characters | |
| 560 * @param h height of the area in characters | |
| 561 * @see #deleteChar | |
| 562 * @see #deleteLine | |
| 563 * @see #redraw | |
| 564 */ | |
| 565 public void deleteArea(int c, int l, int w, int h) { | |
| 566 deleteArea(c, l, w, h, 0); | |
| 567 } | |
| 568 | |
| 569 /** | |
| 570 * Sets whether the cursor is visible or not. | |
| 571 * @param doshow | |
| 572 */ | |
| 573 public void showCursor(boolean doshow) { | |
| 574 showcursor = doshow; | |
| 575 } | |
| 576 | |
| 577 /** | |
| 578 * Check whether the cursor is currently visible. | |
| 579 * @return visibility | |
| 580 */ | |
| 581 public boolean isCursorVisible() { | |
| 582 return showcursor; | |
| 583 } | |
| 584 | |
| 585 /** | |
| 586 * Puts the cursor at the specified position. | |
| 587 * @param c column | |
| 588 * @param l line | |
| 589 */ | |
| 590 public void setCursorPosition(int c, int l) { | |
|
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591 cursorX = (c > width-1) ? width-1 : c; |
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592 cursorY = (l > height-1) ? height-1 : l; |
| 0 | 593 } |
| 594 | |
| 595 /** | |
| 596 * Get the current column of the cursor position. | |
| 597 */ | |
| 598 public int getCursorColumn() { | |
| 599 return cursorX; | |
| 600 } | |
| 601 | |
| 602 /** | |
| 603 * Get the current line of the cursor position. | |
| 604 */ | |
| 605 public int getCursorRow() { | |
| 606 return cursorY; | |
| 607 } | |
| 608 | |
| 609 /** | |
| 610 * Set the current window base. This allows to view the scrollback buffer. | |
| 611 * @param line the line where the screen window starts | |
| 612 * @see #setBufferSize | |
| 613 * @see #getBufferSize | |
| 614 */ | |
| 615 public void setWindowBase(int line) { | |
| 616 if (line > screenBase) | |
| 617 line = screenBase; | |
| 618 else if (line < 0) line = 0; | |
| 619 | |
| 620 windowBase = line; | |
| 621 update[0] = true; | |
| 622 redraw(); | |
| 623 } | |
| 624 | |
| 625 /** | |
| 626 * Get the current window base. | |
| 627 * @see #setWindowBase | |
| 628 */ | |
| 629 public int getWindowBase() { | |
| 630 return windowBase; | |
| 631 } | |
| 632 | |
| 633 /** | |
| 634 * Set the scroll margins simultaneously. If they're out of bounds, trim them. | |
| 635 * @param l1 line that is the top | |
| 636 * @param l2 line that is the bottom | |
| 637 */ | |
| 638 public void setMargins(int l1, int l2) { | |
| 639 if (l1 > l2) | |
| 640 return; | |
| 641 | |
| 642 if (l1 < 0) | |
| 643 l1 = 0; | |
| 644 | |
| 645 if (l2 >= height) | |
| 646 l2 = height - 1; | |
| 647 | |
| 648 topMargin = l1; | |
| 649 bottomMargin = l2; | |
| 650 } | |
| 651 | |
| 652 /** | |
| 653 * Set the top scroll margin for the screen. If the current bottom margin | |
| 654 * is smaller it will become the top margin and the line will become the | |
| 655 * bottom margin. | |
| 656 * @param l line that is the margin | |
| 657 */ | |
| 658 public void setTopMargin(int l) { | |
| 659 if (l > bottomMargin) { | |
| 660 topMargin = bottomMargin; | |
| 661 bottomMargin = l; | |
| 662 } | |
| 663 else | |
| 664 topMargin = l; | |
| 665 | |
| 666 if (topMargin < 0) topMargin = 0; | |
| 667 | |
| 668 if (bottomMargin >= height) bottomMargin = height - 1; | |
| 669 } | |
| 670 | |
| 671 /** | |
| 672 * Get the top scroll margin. | |
| 673 */ | |
| 674 public int getTopMargin() { | |
| 675 return topMargin; | |
| 676 } | |
| 677 | |
| 678 /** | |
| 679 * Set the bottom scroll margin for the screen. If the current top margin | |
| 680 * is bigger it will become the bottom margin and the line will become the | |
| 681 * top margin. | |
| 682 * @param l line that is the margin | |
| 683 */ | |
| 684 public void setBottomMargin(int l) { | |
| 685 if (l < topMargin) { | |
| 686 bottomMargin = topMargin; | |
| 687 topMargin = l; | |
| 688 } | |
| 689 else | |
| 690 bottomMargin = l; | |
| 691 | |
| 692 if (topMargin < 0) topMargin = 0; | |
| 693 | |
| 694 if (bottomMargin >= height) bottomMargin = height - 1; | |
| 695 } | |
| 696 | |
| 697 /** | |
| 698 * Get the bottom scroll margin. | |
| 699 */ | |
| 700 public int getBottomMargin() { | |
| 701 return bottomMargin; | |
| 702 } | |
| 703 | |
| 704 /** | |
| 705 * Set scrollback buffer size. | |
| 706 * @param amount new size of the buffer | |
| 707 */ | |
| 708 public void setBufferSize(int amount) { | |
| 709 if (amount < height) amount = height; | |
| 710 | |
| 711 if (amount < maxBufSize) { | |
| 712 char cbuf[][] = new char[amount][width]; | |
| 713 int abuf[][] = new int[amount][width]; | |
| 714 int copyStart = bufSize - amount < 0 ? 0 : bufSize - amount; | |
| 715 int copyCount = bufSize - amount < 0 ? bufSize : amount; | |
| 716 | |
| 717 if (charArray != null) | |
| 718 System.arraycopy(charArray, copyStart, cbuf, 0, copyCount); | |
| 719 | |
| 720 if (charAttributes != null) | |
| 721 System.arraycopy(charAttributes, copyStart, abuf, 0, copyCount); | |
| 722 | |
| 723 charArray = cbuf; | |
| 724 charAttributes = abuf; | |
| 725 bufSize = copyCount; | |
| 726 screenBase = bufSize - height; | |
| 727 windowBase = screenBase; | |
| 728 } | |
| 729 | |
| 730 maxBufSize = amount; | |
| 731 update[0] = true; | |
| 732 redraw(); | |
| 733 } | |
| 734 | |
| 735 /** | |
| 736 * Retrieve current scrollback buffer size. | |
| 737 * @see #setBufferSize | |
| 738 */ | |
| 739 public int getBufferSize() { | |
| 740 return bufSize; | |
| 741 } | |
| 742 | |
| 743 /** | |
| 744 * Retrieve maximum buffer Size. | |
| 745 * @see #getBufferSize | |
| 746 */ | |
| 747 public int getMaxBufferSize() { | |
| 748 return maxBufSize; | |
| 749 } | |
| 750 | |
| 751 /** | |
| 752 * Change the size of the screen. This will include adjustment of the | |
| 753 * scrollback buffer. | |
| 754 * @param w of the screen | |
| 755 * @param h of the screen | |
| 756 */ | |
| 757 public void setScreenSize(int w, int h, boolean broadcast) { | |
| 758 char cbuf[][]; | |
| 759 int abuf[][]; | |
| 760 int maxSize = bufSize; | |
| 761 | |
| 762 if (w < 1 || h < 1) return; | |
| 763 | |
| 764 if (debug > 0) | |
| 765 System.err.println("VDU: screen size [" + w + "," + h + "]"); | |
| 766 | |
| 767 if (h > maxBufSize) | |
| 768 maxBufSize = h; | |
| 769 | |
| 770 if (h > bufSize) { | |
| 771 bufSize = h; | |
| 772 screenBase = 0; | |
| 773 windowBase = 0; | |
| 774 } | |
| 775 | |
| 776 if (windowBase + h >= bufSize) | |
| 777 windowBase = bufSize - h; | |
| 778 | |
| 779 if (screenBase + h >= bufSize) | |
| 780 screenBase = bufSize - h; | |
| 781 | |
| 782 cbuf = new char[bufSize][w]; | |
| 783 abuf = new int[bufSize][w]; | |
| 784 | |
| 785 for (int i = 0; i < bufSize; i++) { | |
| 786 Arrays.fill(cbuf[i], ' '); | |
| 787 } | |
| 788 | |
| 789 if (bufSize < maxSize) | |
| 790 maxSize = bufSize; | |
| 791 | |
| 792 int rowLength; | |
| 793 | |
| 794 if (charArray != null && charAttributes != null) { | |
| 795 for (int i = 0; i < maxSize && charArray[i] != null; i++) { | |
| 796 rowLength = charArray[i].length; | |
| 797 System.arraycopy(charArray[i], 0, cbuf[i], 0, | |
| 798 w < rowLength ? w : rowLength); | |
| 799 System.arraycopy(charAttributes[i], 0, abuf[i], 0, | |
| 800 w < rowLength ? w : rowLength); | |
| 801 } | |
| 802 } | |
| 803 | |
| 804 int C = getCursorColumn(); | |
| 805 | |
| 806 if (C < 0) | |
| 807 C = 0; | |
| 808 else if (C >= width) | |
| 809 C = width - 1; | |
| 810 | |
| 811 int R = getCursorRow(); | |
| 812 | |
| 813 if (R < 0) | |
| 814 R = 0; | |
| 815 else if (R >= height) | |
| 816 R = height - 1; | |
| 817 | |
| 818 setCursorPosition(C, R); | |
| 819 charArray = cbuf; | |
| 820 charAttributes = abuf; | |
| 821 width = w; | |
| 822 height = h; | |
| 823 topMargin = 0; | |
| 824 bottomMargin = h - 1; | |
| 825 update = new boolean[h + 1]; | |
| 826 update[0] = true; | |
| 827 /* FIXME: ??? | |
| 828 if(resizeStrategy == RESIZE_FONT) | |
| 829 setBounds(getBounds()); | |
| 830 */ | |
| 831 } | |
| 832 | |
| 833 /** | |
| 834 * Get amount of rows on the screen. | |
| 835 */ | |
| 836 public int getRows() { | |
| 837 return height; | |
| 838 } | |
| 839 | |
| 840 /** | |
| 841 * Get amount of columns on the screen. | |
| 842 */ | |
| 843 public int getColumns() { | |
| 844 return width; | |
| 845 } | |
| 846 | |
| 847 /** | |
| 848 * Mark lines to be updated with redraw(). | |
| 849 * @param l starting line | |
| 850 * @param n amount of lines to be updated | |
| 851 * @see #redraw | |
| 852 */ | |
| 853 public void markLine(int l, int n) { | |
| 854 for (int i = 0; (i < n) && (l + i < height); i++) | |
| 855 update[l + i + 1] = true; | |
| 856 } | |
| 857 | |
| 858 // private static int checkBounds(int value, int lower, int upper) { | |
| 859 // if (value < lower) | |
| 860 // return lower; | |
| 861 // else if (value > upper) | |
| 862 // return upper; | |
| 863 // else | |
| 864 // return value; | |
| 865 // } | |
| 866 | |
| 867 public void setDisplay(VDUDisplay display) { | |
| 868 this.display = display; | |
| 869 } | |
| 870 | |
| 871 /** | |
| 872 * Trigger a redraw on the display. | |
| 873 */ | |
| 874 protected void redraw() { | |
| 875 if (display != null) | |
| 876 display.redraw(); | |
| 877 } | |
| 878 } |