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| author | Stephen J. Turnbull <stephen@xemacs.org> |
|---|---|
| date | Mon, 24 Dec 2012 03:08:33 +0900 |
| parents | 308d34e9f07d |
| children | b3824b7f5627 |
| rev | line source |
|---|---|
| 428 | 1 /* Cursor motion subroutines for XEmacs. |
| 2 Copyright (C) 1985, 1994, 1995 Free Software Foundation, Inc. | |
|
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3 Copyright (C) 2010 Ben Wing. |
| 428 | 4 loosely based primarily on public domain code written by Chris Torek |
| 5 | |
| 6 This file is part of XEmacs. | |
| 7 | |
|
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8 XEmacs is free software: you can redistribute it and/or modify it |
| 428 | 9 under the terms of the GNU General Public License as published by the |
|
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10 Free Software Foundation, either version 3 of the License, or (at your |
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11 option) any later version. |
| 428 | 12 |
| 13 XEmacs is distributed in the hope that it will be useful, but WITHOUT | |
| 14 ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or | |
| 15 FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License | |
| 16 for more details. | |
| 17 | |
| 18 You should have received a copy of the GNU General Public License | |
|
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19 along with XEmacs. If not, see <http://www.gnu.org/licenses/>. */ |
| 428 | 20 |
| 21 /* Synched up with: FSF 19.30. Substantially different from FSF. */ | |
| 22 | |
| 23 /* #### This file is extremely junky and needs major fixup. */ | |
| 24 | |
| 25 #include <config.h> | |
| 26 #include "lisp.h" | |
| 27 | |
| 800 | 28 #include "device.h" |
| 428 | 29 #include "frame.h" |
| 30 #include "lstream.h" | |
| 31 #include "redisplay.h" | |
| 32 | |
| 872 | 33 #include "console-tty-impl.h" |
| 800 | 34 |
| 428 | 35 #define EXPENSIVE 2000 |
| 36 | |
| 442 | 37 EXTERN_C char *tgoto (const char *cm, int hpos, int vpos); |
| 38 EXTERN_C int tputs (const char *, int, void (*)(int)); | |
| 428 | 39 |
| 40 static void cmgoto_for_real (struct console *c, int row, int col); | |
| 41 | |
| 42 static int cm_cost_counter; /* sums up costs */ | |
| 43 | |
| 44 static void | |
| 2286 | 45 evalcost (int UNUSED (c)) |
| 428 | 46 { |
| 47 cm_cost_counter++; | |
| 48 } | |
| 49 | |
| 50 /* Ugh -- cmputc() can't take a console argument, so we pass it in a global */ | |
| 51 struct console *cmputc_console; | |
| 52 | |
| 53 void | |
| 54 send_string_to_tty_console (struct console *c, unsigned char *str, int len) | |
| 55 { | |
| 56 /* #### Ben sez: don't some terminals need nulls outputted | |
| 57 for proper timing? */ | |
| 58 Lstream *lstr = XLSTREAM (CONSOLE_TTY_DATA (c)->outstream); | |
| 59 | |
| 60 if (CONSOLE_TTY_REAL_CURSOR_X (c) != CONSOLE_TTY_CURSOR_X (c) | |
| 61 || CONSOLE_TTY_REAL_CURSOR_Y (c) != CONSOLE_TTY_CURSOR_Y (c)) | |
| 62 { | |
| 63 int row = CONSOLE_TTY_CURSOR_Y (c); | |
| 64 int col = CONSOLE_TTY_CURSOR_X (c); | |
| 65 cmgoto_for_real (c, row, col); | |
| 66 } | |
| 67 | |
| 68 if (len == 1) | |
| 69 Lstream_putc (lstr, *str); | |
| 70 else if (len > 0) | |
| 71 Lstream_write (lstr, str, len); | |
| 72 } | |
| 73 | |
| 74 void | |
| 75 cmputc (int c) | |
| 76 { | |
| 77 unsigned char ch = (unsigned char) c; | |
| 78 | |
| 79 if (termscript) | |
| 80 fputc (c, termscript); | |
| 81 | |
| 82 send_string_to_tty_console (cmputc_console, &ch, 1); | |
| 83 } | |
| 84 | |
| 85 #if 0 | |
| 86 | |
| 87 /* | |
| 88 * Terminals with magicwrap (xn) don't all behave identically. | |
| 89 * The VT100 leaves the cursor in the last column but will wrap before | |
| 90 * printing the next character. I hear that the Concept terminal does | |
| 91 * the wrap immediately but ignores the next newline it sees. And some | |
| 92 * terminals just have buggy firmware, and think that the cursor is still | |
| 93 * in limbo if we use direct cursor addressing from the phantom column. | |
| 94 * The only guaranteed safe thing to do is to emit a CRLF immediately | |
| 95 * after we reach the last column; this takes us to a known state. | |
| 96 */ | |
| 97 void | |
| 98 cmcheckmagic (void) | |
| 99 { | |
| 100 if (curX == FrameCols) | |
| 101 { | |
|
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102 assert (MagicWrap && curY < FrameRows - 1); |
| 428 | 103 if (termscript) |
| 104 putc ('\r', termscript); | |
| 105 putchar ('\r'); | |
| 106 if (termscript) | |
| 107 putc ('\n', termscript); | |
| 108 putchar ('\n'); | |
| 109 curX = 0; | |
| 110 curY++; | |
| 111 } | |
| 112 } | |
| 113 | |
| 114 #endif /* 0 */ | |
| 115 | |
| 116 /* | |
| 117 * (Re)Initialize the cost factors, given the output speed of the | |
| 118 * terminal in DEVICE_TTY_DATA (dev)->ospeed. (Note: this holds B300, | |
| 119 * B9600, etc -- ie stuff out of <sgtty.h>.) | |
| 120 */ | |
| 121 void | |
| 122 cm_cost_init (struct console *c) | |
| 123 { | |
| 124 char *tmp; | |
| 125 | |
| 126 cm_cost_counter = 0; | |
| 127 #define COST(x,e) (x \ | |
| 128 ? (cm_cost_counter = 0, tputs (x, 1, e), cm_cost_counter) \ | |
| 129 : EXPENSIVE) | |
| 130 #define MINCOST(x,e) ((x == 0) \ | |
| 131 ? EXPENSIVE \ | |
| 132 : (tmp = tgoto(x, 0, 0), COST(tmp,e))) | |
| 133 | |
| 134 TTY_COST (c).cm_up = COST (TTY_CM (c).up, evalcost); | |
| 135 TTY_COST (c).cm_down = COST (TTY_CM (c).down, evalcost); | |
| 136 TTY_COST (c).cm_left = COST (TTY_CM (c).left, evalcost); | |
| 137 TTY_COST (c).cm_right = COST (TTY_CM (c).right, evalcost); | |
| 138 TTY_COST (c).cm_home = COST (TTY_CM (c).home, evalcost); | |
| 139 TTY_COST (c).cm_low_left = COST (TTY_CM (c).low_left, evalcost); | |
| 140 TTY_COST (c).cm_car_return = COST (TTY_CM (c).car_return, evalcost); | |
| 141 | |
| 142 /* | |
| 143 * These last three are actually minimum costs. When (if) they are | |
| 144 * candidates for the least-cost motion, the real cost is computed. | |
| 145 * (Note that "0" is the assumed to generate the minimum cost. | |
| 146 * While this is not necessarily true, I have yet to see a terminal | |
| 147 * for which is not; all the terminals that have variable-cost | |
| 148 * cursor motion seem to take straight numeric values. --ACT) | |
| 149 */ | |
| 150 | |
| 151 TTY_COST (c).cm_abs = MINCOST (TTY_CM (c).abs, evalcost); | |
| 152 TTY_COST (c).cm_hor_abs = MINCOST (TTY_CM (c).hor_abs, evalcost); | |
| 153 TTY_COST (c).cm_ver_abs = MINCOST (TTY_CM (c).ver_abs, evalcost); | |
| 154 | |
| 155 #undef MINCOST | |
| 156 #undef COST | |
| 157 } | |
| 158 | |
| 159 /* | |
| 160 * Calculate the cost to move from (srcy, srcx) to (dsty, dstx) using | |
| 161 * up and down, and left and right, and motions. If doit is set | |
| 162 * actually perform the motion. | |
| 163 */ | |
| 164 | |
| 165 #ifdef NOT_YET | |
| 166 static int | |
| 167 calccost (struct frame *f, int srcy, int srcx, int dsty, int dstx, int doit) | |
| 168 { | |
| 169 struct console *c = XCONSOLE (FRAME_CONSOLE (f)); | |
| 170 int totalcost = 0; | |
| 171 int deltay, deltax; | |
| 172 char *motion; | |
| 173 int motion_cost; | |
| 174 | |
| 175 #if 0 | |
| 176 int ntabs, n2tabs, tabx, tab2x, tabcost; | |
| 177 #endif | |
| 178 | |
| 179 cmputc_console = c; | |
| 180 #if 0 | |
| 181 /* If have just wrapped on a terminal with xn, | |
| 182 don't believe the cursor position: give up here | |
| 183 and force use of absolute positioning. */ | |
| 184 if (curX == Wcm.cm_cols) | |
| 185 goto fail; | |
| 186 #endif | |
| 187 | |
| 188 deltay = dsty - srcy; | |
| 189 if (!deltay) | |
| 190 goto calculate_x; | |
| 191 | |
| 192 if (deltay < 0) | |
| 193 { | |
| 194 motion = TTY_CM (c).up; | |
| 195 motion_cost = TTY_COST (c).cm_up; | |
| 196 deltay = -deltay; | |
| 197 } | |
| 198 else | |
| 199 { | |
| 200 motion = TTY_CM (c).down; | |
| 201 motion_cost = TTY_COST (c).cm_down; | |
| 202 } | |
| 203 | |
| 204 if (motion_cost == EXPENSIVE) | |
| 205 { | |
| 206 /* if (doit) */ | |
| 207 /* #### printing OOF is not acceptable */ | |
| 208 return motion_cost; | |
| 209 } | |
| 210 | |
| 211 totalcost = motion_cost * deltay; | |
| 212 | |
| 213 if (doit) | |
| 214 while (--deltay >= 0) | |
| 215 tputs (motion, 1, cmputc); | |
| 216 | |
| 217 calculate_x: | |
| 218 | |
| 219 deltax = dstx - srcx; | |
| 220 if (!deltax) | |
| 221 goto done; | |
| 222 | |
| 223 if (deltax < 0) | |
| 224 { | |
| 225 motion = TTY_CM (c).left; | |
| 226 motion_cost = TTY_COST (c).cm_left; | |
| 227 deltax = -deltax; | |
| 228 } | |
| 229 else | |
| 230 { | |
| 231 motion = TTY_CM (c).right; | |
| 232 motion_cost = TTY_COST (c).cm_right; | |
| 233 } | |
| 234 | |
| 235 if (motion_cost == EXPENSIVE) | |
| 236 { | |
| 237 /* if (doit) */ | |
| 238 /* #### printing OOF is not acceptable */ | |
| 239 return motion_cost; | |
| 240 } | |
| 241 | |
| 242 totalcost += motion_cost * deltax; | |
| 243 | |
| 244 if (doit) | |
| 245 while (--deltax >= 0) | |
| 246 tputs (motion, 1, cmputc); | |
| 247 | |
| 248 done: | |
| 249 return totalcost; | |
| 250 } | |
| 251 #endif /* NOT_YET */ | |
| 252 | |
| 253 #define USEREL 0 | |
| 254 #define USEHOME 1 | |
| 255 #define USELL 2 | |
| 256 #define USECR 3 | |
| 257 | |
| 778 | 258 #ifdef OLD_CURSOR_MOTION_SHIT |
| 428 | 259 void |
| 260 cmgoto (struct frame *f, int row, int col) | |
| 261 { | |
| 262 struct console *c = XCONSOLE (FRAME_CONSOLE (f)); | |
| 263 char *motion; | |
| 264 #if 0 | |
| 265 int frame_x = FRAME_CURSOR_X(f); | |
| 266 int frame_y = FRAME_CURSOR_Y(f); | |
| 267 int relcost, directcost, llcost; | |
| 268 int homecost; | |
| 269 int use; | |
| 270 char *dcm; | |
| 271 #endif | |
| 272 | |
| 273 cmputc_console = c; | |
| 274 | |
| 275 /* First the degenerate case */ | |
| 276 #if 0 | |
| 277 if (row == frame_y && col == frame_x) | |
| 278 return; | |
| 279 #endif | |
| 280 | |
| 281 /* #### something is fucked with the non-absolute cases */ | |
| 282 motion = tgoto (TTY_CM (c).abs, col, row); | |
| 283 tputs (motion, 1, cmputc); | |
| 284 CONSOLE_TTY_DATA (c)->cursor_x = col; | |
| 285 CONSOLE_TTY_DATA (c)->cursor_y = row; | |
| 286 return; | |
| 287 | |
| 288 #if 0 | |
| 289 if (frame_y >= 0 && frame_x >= 0) | |
| 290 { | |
| 291 /* | |
| 292 * Pick least-cost motions | |
| 293 */ | |
| 294 | |
| 295 relcost = calccost (f, frame_y, frame_x, row, col, 0); | |
| 296 use = USEREL; | |
| 297 | |
| 298 homecost = TTY_COST (c).cm_home; | |
| 299 if (homecost < EXPENSIVE) | |
| 300 homecost += calccost (f, 0, 0, row, col, 0); | |
| 301 | |
| 302 if (homecost < relcost) | |
| 303 { | |
| 304 relcost = homecost; | |
| 305 use = USEHOME; | |
| 306 } | |
| 307 | |
| 308 llcost = TTY_COST (c).cm_low_left; | |
| 309 if (llcost < EXPENSIVE) | |
| 310 llcost += calccost (f, frame_y - 1, 0, row, col, 0); | |
| 311 | |
| 312 if (llcost < relcost) | |
| 313 { | |
| 314 relcost = llcost; | |
| 315 use = USELL; | |
| 316 } | |
| 317 | |
| 318 #if 0 | |
| 319 if ((crcost = Wcm.cc_cr) < BIG) { | |
| 320 if (Wcm.cm_autolf) | |
| 321 if (curY + 1 >= Wcm.cm_rows) | |
| 322 crcost = BIG; | |
| 323 else | |
| 324 crcost += calccost (curY + 1, 0, row, col, 0); | |
| 325 else | |
| 326 crcost += calccost (curY, 0, row, col, 0); | |
| 327 } | |
| 328 if (crcost < relcost) | |
| 329 relcost = crcost, use = USECR; | |
| 330 #endif | |
| 331 | |
| 332 directcost = TTY_COST (c).cm_abs; | |
| 333 dcm = TTY_CM (c).abs; | |
| 334 | |
| 335 if (row == frame_y && TTY_COST (c).cm_hor_abs < EXPENSIVE) | |
| 336 { | |
| 337 directcost = TTY_COST (c).cm_hor_abs; | |
| 338 dcm = TTY_CM (c).hor_abs; | |
| 339 } | |
| 340 else if (col == frame_x && TTY_COST (c).cm_ver_abs < EXPENSIVE) | |
| 341 { | |
| 342 directcost = TTY_COST (c).cm_ver_abs; | |
| 343 dcm = TTY_CM (c).ver_abs; | |
| 344 } | |
| 345 } | |
| 346 else | |
| 347 { | |
| 348 directcost = 0; | |
| 349 relcost = 100000; | |
| 350 dcm = TTY_CM (c).abs; | |
| 351 } | |
| 352 | |
| 353 /* | |
| 354 * In the following comparison, the = in <= is because when the costs | |
| 355 * are the same, it looks nicer (I think) to move directly there. | |
| 356 */ | |
| 357 if (directcost <= relcost) | |
| 358 { | |
| 359 /* compute REAL direct cost */ | |
| 360 cm_cost_counter = 0; | |
| 361 motion = (dcm == TTY_CM (c).hor_abs | |
| 362 ? tgoto (dcm, row, col) | |
| 363 : tgoto (dcm, col, row)); | |
| 364 tputs (motion, 1, evalcost); | |
| 365 if (cm_cost_counter <= relcost) | |
| 366 { /* really is cheaper */ | |
| 367 tputs (motion, 1, cmputc); | |
| 368 FRAME_CURSOR_Y (f) = row; | |
| 369 FRAME_CURSOR_X (f) = col; | |
| 370 return; | |
| 371 } | |
| 372 } | |
| 373 | |
| 374 switch (use) | |
| 375 { | |
| 376 case USEHOME: | |
| 377 tputs (TTY_CM (c).home, 1, cmputc); | |
| 378 FRAME_CURSOR_X (f) = 0; | |
| 379 FRAME_CURSOR_Y (f) = 0; | |
| 380 break; | |
| 381 | |
| 382 case USELL: | |
| 383 tputs (TTY_CM (c).low_left, 1, cmputc); | |
| 384 FRAME_CURSOR_Y (f) = FRAME_HEIGHT (f) - 1; | |
| 385 FRAME_CURSOR_X (f) = 0; | |
| 386 break; | |
| 387 | |
| 388 #if 0 | |
| 389 case USECR: | |
| 390 tputs (Wcm.cm_cr, 1, cmputc); | |
| 391 if (Wcm.cm_autolf) | |
| 392 curY++; | |
| 393 curX = 0; | |
| 394 break; | |
| 395 #endif | |
| 396 } | |
| 397 | |
| 398 calccost (f, FRAME_CURSOR_Y (f), FRAME_CURSOR_X (f), row, col, 1); | |
| 399 FRAME_CURSOR_Y (f) = row; | |
| 400 FRAME_CURSOR_X (f) = col; | |
| 401 #endif | |
| 402 } | |
| 403 #endif /* OLD_CURSOR_MOTION_SHIT */ | |
| 404 | |
| 405 /***************************************************************************** | |
| 406 cmgoto | |
| 407 | |
| 408 This function is responsible for getting the cursor from its current | |
| 409 location to the passed location in the most efficient manner | |
| 410 possible. | |
| 411 ****************************************************************************/ | |
| 412 static void | |
| 413 cmgoto_for_real (struct console *c, int row, int col) | |
| 414 { | |
| 415 char *motion; | |
| 416 | |
| 417 cmputc_console = c; | |
| 418 | |
| 419 /* First make sure that we actually have to do any work at all. */ | |
| 420 if (CONSOLE_TTY_REAL_CURSOR_X (c) == col | |
| 421 && CONSOLE_TTY_REAL_CURSOR_Y (c) == row) | |
| 422 return; | |
| 423 | |
| 424 CONSOLE_TTY_REAL_CURSOR_X (c) = col; | |
| 425 CONSOLE_TTY_REAL_CURSOR_Y (c) = row; | |
| 426 | |
| 427 /* #### Need to reimplement cost analysis and potential relative | |
| 428 movement. */ | |
| 429 | |
| 430 /* If all else fails, use absolute movement. */ | |
| 431 motion = tgoto (TTY_CM (c).abs, col, row); | |
| 432 tputs (motion, 1, cmputc); | |
| 433 CONSOLE_TTY_CURSOR_X (c) = col; | |
| 434 CONSOLE_TTY_CURSOR_Y (c) = row; | |
| 435 } | |
| 436 | |
| 437 void | |
| 438 cmgoto (struct frame *f, int row, int col) | |
| 439 { | |
| 440 /* We delay cursor motion until we do something other than cursor motion, | |
| 441 to optimize the case where cmgoto() is called twice in a row. */ | |
| 442 struct console *c = XCONSOLE (FRAME_CONSOLE (f)); | |
| 443 CONSOLE_TTY_CURSOR_X (c) = col; | |
| 444 CONSOLE_TTY_CURSOR_Y (c) = row; | |
| 445 } | |
| 446 | |
| 447 #if 0 | |
| 448 /* Clear out all terminal info. | |
| 449 Used before copying into it the info on the actual terminal. | |
| 450 */ | |
| 451 | |
| 452 void | |
| 453 Wcm_clear (void) | |
| 454 { | |
| 455 xzero (Wcm); | |
| 456 UP = 0; | |
| 457 BC = 0; | |
| 458 } | |
| 459 #endif | |
| 460 | |
| 461 #if 0 | |
| 462 /* | |
| 463 * Initialized stuff | |
| 464 * Return 0 if can do CM. | |
| 465 * Return -1 if cannot. | |
| 466 * Return -2 if size not specified. | |
| 467 */ | |
| 468 | |
| 469 int | |
| 470 Wcm_init (void) | |
| 471 { | |
| 472 #if 0 | |
| 473 if (Wcm.cm_abs && !Wcm.cm_ds) | |
| 474 return 0; | |
| 475 #endif | |
| 476 if (Wcm.cm_abs) | |
| 477 return 0; | |
| 478 /* Require up and left, and, if no absolute, down and right */ | |
| 479 if (!Wcm.cm_up || !Wcm.cm_left) | |
| 480 return - 1; | |
| 481 if (!Wcm.cm_abs && (!Wcm.cm_down || !Wcm.cm_right)) | |
| 482 return - 1; | |
| 483 /* Check that we know the size of the frame.... */ | |
| 484 if (Wcm.cm_rows <= 0 || Wcm.cm_cols <= 0) | |
| 485 return - 2; | |
| 486 return 0; | |
| 487 } | |
| 488 #endif |