1 /*- 2 * SPDX-License-Identifier: BSD-2-Clause-FreeBSD 3 * 4 * Copyright (c) 2009, 2013 The FreeBSD Foundation 5 * All rights reserved. 6 * 7 * This software was developed by Ed Schouten under sponsorship from the 8 * FreeBSD Foundation. 9 * 10 * Portions of this software were developed by Oleksandr Rybalko 11 * under sponsorship from the FreeBSD Foundation. 12 * 13 * Redistribution and use in source and binary forms, with or without 14 * modification, are permitted provided that the following conditions 15 * are met: 16 * 1. Redistributions of source code must retain the above copyright 17 * notice, this list of conditions and the following disclaimer. 18 * 2. Redistributions in binary form must reproduce the above copyright 19 * notice, this list of conditions and the following disclaimer in the 20 * documentation and/or other materials provided with the distribution. 21 * 22 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND 23 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 24 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 25 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 26 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 27 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 28 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 29 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 30 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 31 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 32 * SUCH DAMAGE. 33 */ 34 35 #include <sys/cdefs.h> 36 __FBSDID("$FreeBSD$"); 37 38 #include <sys/param.h> 39 #include <sys/kernel.h> 40 #include <sys/lock.h> 41 #include <sys/malloc.h> 42 #include <sys/mutex.h> 43 #include <sys/reboot.h> 44 #include <sys/systm.h> 45 46 #include <dev/vt/vt.h> 47 48 static MALLOC_DEFINE(M_VTBUF, "vtbuf", "vt buffer"); 49 50 #define VTBUF_LOCK(vb) mtx_lock_spin(&(vb)->vb_lock) 51 #define VTBUF_UNLOCK(vb) mtx_unlock_spin(&(vb)->vb_lock) 52 53 #define POS_INDEX(c, r) (((r) << 12) + (c)) 54 #define POS_COPY(d, s) do { \ 55 (d).tp_col = (s).tp_col; \ 56 (d).tp_row = (s).tp_row; \ 57 } while (0) 58 59 #ifndef SC_NO_CUTPASTE 60 static int vtbuf_htw(const struct vt_buf *vb, int row); 61 static int vtbuf_wth(const struct vt_buf *vb, int row); 62 static int vtbuf_in_this_range(int begin, int test, int end, int sz); 63 #endif 64 65 /* 66 * line4 67 * line5 <--- curroffset (terminal output to that line) 68 * line0 69 * line1 <--- roffset (history display from that point) 70 * line2 71 * line3 72 */ 73 int 74 vthistory_seek(struct vt_buf *vb, int offset, int whence) 75 { 76 int diff, top, bottom, roffset; 77 78 /* No scrolling if not enabled. */ 79 if ((vb->vb_flags & VBF_SCROLL) == 0) { 80 if (vb->vb_roffset != vb->vb_curroffset) { 81 vb->vb_roffset = vb->vb_curroffset; 82 return (0xffff); 83 } 84 return (0); /* No changes */ 85 } 86 87 /* "top" may be a negative integer. */ 88 bottom = vb->vb_curroffset; 89 top = (vb->vb_flags & VBF_HISTORY_FULL) ? 90 bottom + vb->vb_scr_size.tp_row - vb->vb_history_size : 91 0; 92 93 roffset = 0; /* Make gcc happy. */ 94 switch (whence) { 95 case VHS_SET: 96 if (offset < 0) 97 offset = 0; 98 roffset = top + offset; 99 break; 100 case VHS_CUR: 101 /* 102 * Operate on copy of offset value, since it temporary 103 * can be bigger than amount of rows in buffer. 104 */ 105 roffset = vb->vb_roffset; 106 if (roffset >= bottom + vb->vb_scr_size.tp_row) 107 roffset -= vb->vb_history_size; 108 109 roffset += offset; 110 roffset = MAX(roffset, top); 111 roffset = MIN(roffset, bottom); 112 113 if (roffset < 0) 114 roffset = vb->vb_history_size + roffset; 115 116 break; 117 case VHS_END: 118 /* Go to current offset. */ 119 roffset = vb->vb_curroffset; 120 break; 121 } 122 123 diff = vb->vb_roffset != roffset; 124 vb->vb_roffset = roffset; 125 126 return (diff); 127 } 128 129 void 130 vthistory_addlines(struct vt_buf *vb, int offset) 131 { 132 #ifndef SC_NO_CUTPASTE 133 int cur, sz; 134 #endif 135 136 vb->vb_curroffset += offset; 137 if (vb->vb_curroffset + vb->vb_scr_size.tp_row >= vb->vb_history_size) { 138 vb->vb_flags |= VBF_HISTORY_FULL; 139 vb->vb_curroffset %= vb->vb_history_size; 140 } 141 if ((vb->vb_flags & VBF_SCROLL) == 0) { 142 vb->vb_roffset = vb->vb_curroffset; 143 } 144 145 #ifndef SC_NO_CUTPASTE 146 sz = vb->vb_history_size; 147 cur = vb->vb_roffset + vb->vb_scr_size.tp_row + sz - 1; 148 if (vtbuf_in_this_range(cur, vb->vb_mark_start.tp_row, cur + offset, sz) || 149 vtbuf_in_this_range(cur, vb->vb_mark_end.tp_row, cur + offset, sz)) { 150 /* clear screen selection */ 151 vb->vb_mark_start.tp_row = vb->vb_mark_end.tp_row; 152 vb->vb_mark_start.tp_col = vb->vb_mark_end.tp_col; 153 } 154 #endif 155 } 156 157 void 158 vthistory_getpos(const struct vt_buf *vb, unsigned int *offset) 159 { 160 161 *offset = vb->vb_roffset; 162 } 163 164 #ifndef SC_NO_CUTPASTE /* Only mouse support use it now. */ 165 /* Translate history row to current view row number. */ 166 static int 167 vtbuf_htw(const struct vt_buf *vb, int row) 168 { 169 170 /* 171 * total 1000 rows. 172 * History offset roffset winrow 173 * 205 200 ((205 - 200 + 1000) % 1000) = 5 174 * 90 990 ((90 - 990 + 1000) % 1000) = 100 175 */ 176 return ((row - vb->vb_roffset + vb->vb_history_size) % 177 vb->vb_history_size); 178 } 179 180 /* Translate current view row number to history row. */ 181 static int 182 vtbuf_wth(const struct vt_buf *vb, int row) 183 { 184 185 return ((vb->vb_roffset + row) % vb->vb_history_size); 186 } 187 188 /* 189 * Test if an index in a circular buffer is within a range. 190 * 191 * begin - start index 192 * end - end index 193 * test - test index 194 * sz - size of circular buffer when it turns over 195 */ 196 static int 197 vtbuf_in_this_range(int begin, int test, int end, int sz) 198 { 199 200 begin %= sz; 201 end %= sz; 202 203 /* check for inversion */ 204 if (begin > end) 205 return (test >= begin || test < end); 206 else 207 return (test >= begin && test < end); 208 } 209 #endif 210 211 int 212 vtbuf_iscursor(const struct vt_buf *vb, int row, int col) 213 { 214 #ifndef SC_NO_CUTPASTE 215 int sc, sr, sz, ec, er, tmp; 216 #endif 217 218 if ((vb->vb_flags & (VBF_CURSOR|VBF_SCROLL)) == VBF_CURSOR && 219 (vb->vb_cursor.tp_row == row) && (vb->vb_cursor.tp_col == col)) 220 return (1); 221 222 #ifndef SC_NO_CUTPASTE 223 /* Mark cut/paste region. */ 224 if (vb->vb_mark_start.tp_col == vb->vb_mark_end.tp_col && 225 vb->vb_mark_start.tp_row == vb->vb_mark_end.tp_row) 226 return (0); 227 228 sc = vb->vb_mark_start.tp_col; 229 sr = vb->vb_mark_start.tp_row; 230 ec = vb->vb_mark_end.tp_col; 231 er = vb->vb_mark_end.tp_row; 232 233 /* 234 * Information about if the selection was made bottom-top or 235 * top-bottom is lost due to modulo arithmetics and needs to 236 * be recovered: 237 */ 238 sz = vb->vb_history_size; 239 tmp = (sz + er - sr) % sz; 240 row = vtbuf_wth(vb, row); 241 242 /* Swap start and end if start > end */ 243 if ((2 * tmp) > sz || (tmp == 0 && sc > ec)) { 244 tmp = sc; sc = ec; ec = tmp; 245 tmp = sr; sr = er; er = tmp; 246 } 247 248 if (vtbuf_in_this_range(POS_INDEX(sc, sr), POS_INDEX(col, row), 249 POS_INDEX(ec, er), POS_INDEX(0, sz))) 250 return (1); 251 #endif 252 253 return (0); 254 } 255 256 void 257 vtbuf_lock(struct vt_buf *vb) 258 { 259 260 VTBUF_LOCK(vb); 261 } 262 263 void 264 vtbuf_unlock(struct vt_buf *vb) 265 { 266 267 VTBUF_UNLOCK(vb); 268 } 269 270 void 271 vtbuf_dirty(struct vt_buf *vb, const term_rect_t *area) 272 { 273 274 if (vb->vb_dirtyrect.tr_begin.tp_row > area->tr_begin.tp_row) 275 vb->vb_dirtyrect.tr_begin.tp_row = area->tr_begin.tp_row; 276 if (vb->vb_dirtyrect.tr_begin.tp_col > area->tr_begin.tp_col) 277 vb->vb_dirtyrect.tr_begin.tp_col = area->tr_begin.tp_col; 278 if (vb->vb_dirtyrect.tr_end.tp_row < area->tr_end.tp_row) 279 vb->vb_dirtyrect.tr_end.tp_row = area->tr_end.tp_row; 280 if (vb->vb_dirtyrect.tr_end.tp_col < area->tr_end.tp_col) 281 vb->vb_dirtyrect.tr_end.tp_col = area->tr_end.tp_col; 282 } 283 284 static inline void 285 vtbuf_dirty_cell(struct vt_buf *vb, const term_pos_t *p) 286 { 287 term_rect_t area; 288 289 area.tr_begin = *p; 290 area.tr_end.tp_row = p->tp_row + 1; 291 area.tr_end.tp_col = p->tp_col + 1; 292 vtbuf_dirty(vb, &area); 293 } 294 295 static void 296 vtbuf_make_undirty(struct vt_buf *vb) 297 { 298 299 vb->vb_dirtyrect.tr_begin = vb->vb_scr_size; 300 vb->vb_dirtyrect.tr_end.tp_row = vb->vb_dirtyrect.tr_end.tp_col = 0; 301 } 302 303 void 304 vtbuf_undirty(struct vt_buf *vb, term_rect_t *r) 305 { 306 307 *r = vb->vb_dirtyrect; 308 vtbuf_make_undirty(vb); 309 } 310 311 void 312 vtbuf_copy(struct vt_buf *vb, const term_rect_t *r, const term_pos_t *p2) 313 { 314 const term_pos_t *p1 = &r->tr_begin; 315 term_rect_t area; 316 unsigned int rows, cols; 317 int pr, rdiff; 318 319 KASSERT(r->tr_begin.tp_row < vb->vb_scr_size.tp_row, 320 ("vtbuf_copy begin.tp_row %d must be less than screen width %d", 321 r->tr_begin.tp_row, vb->vb_scr_size.tp_row)); 322 KASSERT(r->tr_begin.tp_col < vb->vb_scr_size.tp_col, 323 ("vtbuf_copy begin.tp_col %d must be less than screen height %d", 324 r->tr_begin.tp_col, vb->vb_scr_size.tp_col)); 325 326 KASSERT(r->tr_end.tp_row <= vb->vb_scr_size.tp_row, 327 ("vtbuf_copy end.tp_row %d must be less than screen width %d", 328 r->tr_end.tp_row, vb->vb_scr_size.tp_row)); 329 KASSERT(r->tr_end.tp_col <= vb->vb_scr_size.tp_col, 330 ("vtbuf_copy end.tp_col %d must be less than screen height %d", 331 r->tr_end.tp_col, vb->vb_scr_size.tp_col)); 332 333 KASSERT(p2->tp_row < vb->vb_scr_size.tp_row, 334 ("vtbuf_copy tp_row %d must be less than screen width %d", 335 p2->tp_row, vb->vb_scr_size.tp_row)); 336 KASSERT(p2->tp_col < vb->vb_scr_size.tp_col, 337 ("vtbuf_copy tp_col %d must be less than screen height %d", 338 p2->tp_col, vb->vb_scr_size.tp_col)); 339 340 rows = r->tr_end.tp_row - r->tr_begin.tp_row; 341 rdiff = r->tr_begin.tp_row - p2->tp_row; 342 cols = r->tr_end.tp_col - r->tr_begin.tp_col; 343 if (r->tr_begin.tp_row > p2->tp_row && r->tr_begin.tp_col == 0 && 344 r->tr_end.tp_col == vb->vb_scr_size.tp_col && /* Full row. */ 345 (rows + rdiff) == vb->vb_scr_size.tp_row && /* Whole screen. */ 346 rdiff > 0) { /* Only forward direction. Do not eat history. */ 347 vthistory_addlines(vb, rdiff); 348 } else if (p2->tp_row < p1->tp_row) { 349 /* Handle overlapping copies of line segments. */ 350 /* Move data up. */ 351 for (pr = 0; pr < rows; pr++) 352 memmove( 353 &VTBUF_FIELD(vb, p2->tp_row + pr, p2->tp_col), 354 &VTBUF_FIELD(vb, p1->tp_row + pr, p1->tp_col), 355 cols * sizeof(term_char_t)); 356 } else { 357 /* Move data down. */ 358 for (pr = rows - 1; pr >= 0; pr--) 359 memmove( 360 &VTBUF_FIELD(vb, p2->tp_row + pr, p2->tp_col), 361 &VTBUF_FIELD(vb, p1->tp_row + pr, p1->tp_col), 362 cols * sizeof(term_char_t)); 363 } 364 365 area.tr_begin = *p2; 366 area.tr_end.tp_row = MIN(p2->tp_row + rows, vb->vb_scr_size.tp_row); 367 area.tr_end.tp_col = MIN(p2->tp_col + cols, vb->vb_scr_size.tp_col); 368 vtbuf_dirty(vb, &area); 369 } 370 371 static void 372 vtbuf_do_fill(struct vt_buf *vb, const term_rect_t *r, term_char_t c) 373 { 374 unsigned int pr, pc; 375 term_char_t *row; 376 377 for (pr = r->tr_begin.tp_row; pr < r->tr_end.tp_row; pr++) { 378 row = vb->vb_rows[(vb->vb_curroffset + pr) % 379 VTBUF_MAX_HEIGHT(vb)]; 380 for (pc = r->tr_begin.tp_col; pc < r->tr_end.tp_col; pc++) { 381 row[pc] = c; 382 } 383 } 384 } 385 386 void 387 vtbuf_fill(struct vt_buf *vb, const term_rect_t *r, term_char_t c) 388 { 389 390 KASSERT(r->tr_begin.tp_row < vb->vb_scr_size.tp_row, 391 ("vtbuf_fill begin.tp_row %d must be < screen height %d", 392 r->tr_begin.tp_row, vb->vb_scr_size.tp_row)); 393 KASSERT(r->tr_begin.tp_col < vb->vb_scr_size.tp_col, 394 ("vtbuf_fill begin.tp_col %d must be < screen width %d", 395 r->tr_begin.tp_col, vb->vb_scr_size.tp_col)); 396 397 KASSERT(r->tr_end.tp_row <= vb->vb_scr_size.tp_row, 398 ("vtbuf_fill end.tp_row %d must be <= screen height %d", 399 r->tr_end.tp_row, vb->vb_scr_size.tp_row)); 400 KASSERT(r->tr_end.tp_col <= vb->vb_scr_size.tp_col, 401 ("vtbuf_fill end.tp_col %d must be <= screen width %d", 402 r->tr_end.tp_col, vb->vb_scr_size.tp_col)); 403 404 vtbuf_do_fill(vb, r, c); 405 vtbuf_dirty(vb, r); 406 } 407 408 static void 409 vtbuf_init_rows(struct vt_buf *vb) 410 { 411 int r; 412 413 vb->vb_history_size = MAX(vb->vb_history_size, vb->vb_scr_size.tp_row); 414 415 for (r = 0; r < vb->vb_history_size; r++) 416 vb->vb_rows[r] = &vb->vb_buffer[r * vb->vb_scr_size.tp_col]; 417 } 418 419 static void 420 vtbuf_do_clearhistory(struct vt_buf *vb) 421 { 422 term_rect_t rect; 423 const teken_attr_t *a; 424 term_char_t ch; 425 426 a = teken_get_curattr(&vb->vb_terminal->tm_emulator); 427 ch = TCOLOR_FG(a->ta_fgcolor) | TCOLOR_BG(a->ta_bgcolor); 428 429 rect.tr_begin.tp_row = rect.tr_begin.tp_col = 0; 430 rect.tr_end.tp_col = vb->vb_scr_size.tp_col; 431 rect.tr_end.tp_row = vb->vb_history_size; 432 433 vtbuf_do_fill(vb, &rect, VTBUF_SPACE_CHAR(ch)); 434 } 435 436 static void 437 vtbuf_reset_scrollback(struct vt_buf *vb) 438 { 439 vb->vb_roffset = 0; 440 vb->vb_curroffset = 0; 441 vb->vb_mark_start.tp_row = 0; 442 vb->vb_mark_start.tp_col = 0; 443 vb->vb_mark_end.tp_row = 0; 444 vb->vb_mark_end.tp_col = 0; 445 } 446 447 void 448 vtbuf_init_early(struct vt_buf *vb) 449 { 450 vb->vb_flags |= VBF_CURSOR; 451 vtbuf_reset_scrollback(vb); 452 vtbuf_init_rows(vb); 453 vtbuf_do_clearhistory(vb); 454 vtbuf_make_undirty(vb); 455 if ((vb->vb_flags & VBF_MTX_INIT) == 0) { 456 mtx_init(&vb->vb_lock, "vtbuf", NULL, MTX_SPIN); 457 vb->vb_flags |= VBF_MTX_INIT; 458 } 459 } 460 461 void 462 vtbuf_init(struct vt_buf *vb, const term_pos_t *p) 463 { 464 int sz; 465 466 vb->vb_scr_size = *p; 467 vb->vb_history_size = VBF_DEFAULT_HISTORY_SIZE; 468 469 if ((vb->vb_flags & VBF_STATIC) == 0) { 470 sz = vb->vb_history_size * p->tp_col * sizeof(term_char_t); 471 vb->vb_buffer = malloc(sz, M_VTBUF, M_WAITOK | M_ZERO); 472 473 sz = vb->vb_history_size * sizeof(term_char_t *); 474 vb->vb_rows = malloc(sz, M_VTBUF, M_WAITOK | M_ZERO); 475 } 476 477 vtbuf_init_early(vb); 478 } 479 480 void 481 vtbuf_clearhistory(struct vt_buf *vb) 482 { 483 VTBUF_LOCK(vb); 484 vtbuf_do_clearhistory(vb); 485 vtbuf_reset_scrollback(vb); 486 vb->vb_flags &= ~VBF_HISTORY_FULL; 487 VTBUF_UNLOCK(vb); 488 } 489 490 void 491 vtbuf_sethistory_size(struct vt_buf *vb, unsigned int size) 492 { 493 term_pos_t p; 494 495 /* With same size */ 496 p.tp_row = vb->vb_scr_size.tp_row; 497 p.tp_col = vb->vb_scr_size.tp_col; 498 vtbuf_grow(vb, &p, size); 499 } 500 501 void 502 vtbuf_grow(struct vt_buf *vb, const term_pos_t *p, unsigned int history_size) 503 { 504 term_char_t *old, *new, **rows, **oldrows, **copyrows, *row, *oldrow; 505 unsigned int w, h, c, r, old_history_size; 506 size_t bufsize, rowssize; 507 int history_full; 508 const teken_attr_t *a; 509 term_char_t ch; 510 511 a = teken_get_curattr(&vb->vb_terminal->tm_emulator); 512 ch = TCOLOR_FG(a->ta_fgcolor) | TCOLOR_BG(a->ta_bgcolor); 513 514 history_size = MAX(history_size, p->tp_row); 515 516 /* Allocate new buffer. */ 517 bufsize = history_size * p->tp_col * sizeof(term_char_t); 518 new = malloc(bufsize, M_VTBUF, M_WAITOK | M_ZERO); 519 rowssize = history_size * sizeof(term_pos_t *); 520 rows = malloc(rowssize, M_VTBUF, M_WAITOK | M_ZERO); 521 522 /* Toggle it. */ 523 VTBUF_LOCK(vb); 524 old = vb->vb_flags & VBF_STATIC ? NULL : vb->vb_buffer; 525 oldrows = vb->vb_flags & VBF_STATIC ? NULL : vb->vb_rows; 526 copyrows = vb->vb_rows; 527 528 w = vb->vb_scr_size.tp_col; 529 h = vb->vb_scr_size.tp_row; 530 old_history_size = vb->vb_history_size; 531 history_full = vb->vb_flags & VBF_HISTORY_FULL || 532 vb->vb_curroffset + h >= history_size; 533 534 vb->vb_history_size = history_size; 535 vb->vb_buffer = new; 536 vb->vb_rows = rows; 537 vb->vb_flags &= ~VBF_STATIC; 538 vb->vb_scr_size = *p; 539 vtbuf_init_rows(vb); 540 541 /* 542 * Copy rows to the new buffer. The first row in the history 543 * is back to index 0, ie. the new buffer doesn't cycle. 544 */ 545 if (history_size > old_history_size) { 546 for (r = 0; r < old_history_size; r ++) { 547 row = rows[r]; 548 549 /* Compute the corresponding row in the old buffer. */ 550 if (history_full) 551 /* 552 * The buffer is full, the "top" row is 553 * the one just after the viewable area 554 * (curroffset + viewable height) in the 555 * cycling buffer. The corresponding row 556 * is computed from this top row. 557 */ 558 oldrow = copyrows[ 559 (vb->vb_curroffset + h + r) % 560 old_history_size]; 561 else 562 /* 563 * The buffer is not full, therefore, 564 * we didn't cycle already. The 565 * corresponding rows are the same in 566 * both buffers. 567 */ 568 oldrow = copyrows[r]; 569 570 memmove(row, oldrow, 571 MIN(p->tp_col, w) * sizeof(term_char_t)); 572 573 /* 574 * XXX VTBUF_SPACE_CHAR(TERMINAL_NORM_ATTR) will 575 * extended lines of kernel text using the wrong 576 * background color. 577 */ 578 for (c = MIN(p->tp_col, w); c < p->tp_col; c++) { 579 row[c] = VTBUF_SPACE_CHAR(ch); 580 } 581 } 582 583 /* Fill remaining rows. */ 584 for (r = old_history_size; r < history_size; r++) { 585 row = rows[r]; 586 for (c = MIN(p->tp_col, w); c < p->tp_col; c++) { 587 row[c] = VTBUF_SPACE_CHAR(ch); 588 } 589 } 590 591 vb->vb_flags &= ~VBF_HISTORY_FULL; 592 593 /* 594 * If the screen is already filled (there are non-visible lines 595 * above the current viewable area), adjust curroffset to the 596 * new viewable area. 597 * 598 * If the old buffer was full, set curroffset to the 599 * <h>th most recent line of history in the new, non-cycled 600 * buffer. Otherwise, it didn't cycle, so the old curroffset 601 * is the same in the new buffer. 602 */ 603 if (history_full) 604 vb->vb_curroffset = old_history_size - h; 605 } else { 606 /* 607 * (old_history_size - history_size) lines of history are 608 * dropped. 609 */ 610 for (r = 0; r < history_size; r ++) { 611 row = rows[r]; 612 613 /* 614 * Compute the corresponding row in the old buffer. 615 * 616 * See the equivalent if{} block above for an 617 * explanation. 618 */ 619 if (history_full) 620 oldrow = copyrows[ 621 (vb->vb_curroffset + h + r + 622 (old_history_size - history_size)) % 623 old_history_size]; 624 else 625 oldrow = copyrows[r]; 626 627 memmove(row, oldrow, 628 MIN(p->tp_col, w) * sizeof(term_char_t)); 629 630 /* 631 * XXX VTBUF_SPACE_CHAR(TERMINAL_NORM_ATTR) will 632 * extended lines of kernel text using the wrong 633 * background color. 634 */ 635 for (c = MIN(p->tp_col, w); c < p->tp_col; c++) { 636 row[c] = VTBUF_SPACE_CHAR(ch); 637 } 638 } 639 640 if (history_full) { 641 vb->vb_curroffset = history_size - h; 642 vb->vb_flags |= VBF_HISTORY_FULL; 643 } 644 } 645 646 vb->vb_roffset = vb->vb_curroffset; 647 648 /* Adjust cursor position. */ 649 if (vb->vb_cursor.tp_col > p->tp_col - 1) 650 /* 651 * Move cursor to the last column, in case its previous 652 * position is outside of the new screen area. 653 */ 654 vb->vb_cursor.tp_col = p->tp_col - 1; 655 656 if (vb->vb_curroffset > 0 || vb->vb_cursor.tp_row > p->tp_row - 1) 657 /* Move cursor to the last line on the screen. */ 658 vb->vb_cursor.tp_row = p->tp_row - 1; 659 660 VTBUF_UNLOCK(vb); 661 662 /* Deallocate old buffer. */ 663 free(old, M_VTBUF); 664 free(oldrows, M_VTBUF); 665 } 666 667 void 668 vtbuf_putchar(struct vt_buf *vb, const term_pos_t *p, term_char_t c) 669 { 670 term_char_t *row; 671 672 KASSERT(p->tp_row < vb->vb_scr_size.tp_row, 673 ("vtbuf_putchar tp_row %d must be less than screen width %d", 674 p->tp_row, vb->vb_scr_size.tp_row)); 675 KASSERT(p->tp_col < vb->vb_scr_size.tp_col, 676 ("vtbuf_putchar tp_col %d must be less than screen height %d", 677 p->tp_col, vb->vb_scr_size.tp_col)); 678 679 row = vb->vb_rows[(vb->vb_curroffset + p->tp_row) % 680 VTBUF_MAX_HEIGHT(vb)]; 681 if (row[p->tp_col] != c) { 682 row[p->tp_col] = c; 683 vtbuf_dirty_cell(vb, p); 684 } 685 } 686 687 void 688 vtbuf_cursor_position(struct vt_buf *vb, const term_pos_t *p) 689 { 690 if (vb->vb_flags & VBF_CURSOR) { 691 vtbuf_dirty_cell(vb, &vb->vb_cursor); 692 vb->vb_cursor = *p; 693 vtbuf_dirty_cell(vb, &vb->vb_cursor); 694 } else { 695 vb->vb_cursor = *p; 696 } 697 } 698 699 #ifndef SC_NO_CUTPASTE 700 static void 701 vtbuf_flush_mark(struct vt_buf *vb) 702 { 703 term_rect_t area; 704 int s, e; 705 706 /* Notify renderer to update marked region. */ 707 if ((vb->vb_mark_start.tp_col != vb->vb_mark_end.tp_col) || 708 (vb->vb_mark_start.tp_row != vb->vb_mark_end.tp_row)) { 709 s = vtbuf_htw(vb, vb->vb_mark_start.tp_row); 710 e = vtbuf_htw(vb, vb->vb_mark_end.tp_row); 711 712 area.tr_begin.tp_col = 0; 713 area.tr_begin.tp_row = MIN(s, e); 714 715 area.tr_end.tp_col = vb->vb_scr_size.tp_col; 716 area.tr_end.tp_row = MAX(s, e) + 1; 717 718 VTBUF_LOCK(vb); 719 vtbuf_dirty(vb, &area); 720 VTBUF_UNLOCK(vb); 721 } 722 } 723 724 int 725 vtbuf_get_marked_len(struct vt_buf *vb) 726 { 727 int ei, si, sz; 728 term_pos_t s, e; 729 730 /* Swap according to window coordinates. */ 731 if (POS_INDEX(vtbuf_htw(vb, vb->vb_mark_start.tp_row), 732 vb->vb_mark_start.tp_col) > 733 POS_INDEX(vtbuf_htw(vb, vb->vb_mark_end.tp_row), 734 vb->vb_mark_end.tp_col)) { 735 POS_COPY(e, vb->vb_mark_start); 736 POS_COPY(s, vb->vb_mark_end); 737 } else { 738 POS_COPY(s, vb->vb_mark_start); 739 POS_COPY(e, vb->vb_mark_end); 740 } 741 742 si = s.tp_row * vb->vb_scr_size.tp_col + s.tp_col; 743 ei = e.tp_row * vb->vb_scr_size.tp_col + e.tp_col; 744 745 /* Number symbols and number of rows to inject \n */ 746 sz = ei - si + ((e.tp_row - s.tp_row) * 2); 747 748 return (sz * sizeof(term_char_t)); 749 } 750 751 void 752 vtbuf_extract_marked(struct vt_buf *vb, term_char_t *buf, int sz) 753 { 754 int i, r, c, cs, ce; 755 term_pos_t s, e; 756 757 /* Swap according to window coordinates. */ 758 if (POS_INDEX(vtbuf_htw(vb, vb->vb_mark_start.tp_row), 759 vb->vb_mark_start.tp_col) > 760 POS_INDEX(vtbuf_htw(vb, vb->vb_mark_end.tp_row), 761 vb->vb_mark_end.tp_col)) { 762 POS_COPY(e, vb->vb_mark_start); 763 POS_COPY(s, vb->vb_mark_end); 764 } else { 765 POS_COPY(s, vb->vb_mark_start); 766 POS_COPY(e, vb->vb_mark_end); 767 } 768 769 i = 0; 770 for (r = s.tp_row; r <= e.tp_row; r ++) { 771 cs = (r == s.tp_row)?s.tp_col:0; 772 ce = (r == e.tp_row)?e.tp_col:vb->vb_scr_size.tp_col; 773 for (c = cs; c < ce; c ++) { 774 buf[i++] = vb->vb_rows[r][c]; 775 } 776 /* Add new line for all rows, but not for last one. */ 777 if (r != e.tp_row) { 778 buf[i++] = '\r'; 779 buf[i++] = '\n'; 780 } 781 } 782 } 783 784 int 785 vtbuf_set_mark(struct vt_buf *vb, int type, int col, int row) 786 { 787 term_char_t *r; 788 int i; 789 790 switch (type) { 791 case VTB_MARK_END: /* B1 UP */ 792 if (vb->vb_mark_last != VTB_MARK_MOVE) 793 return (0); 794 /* FALLTHROUGH */ 795 case VTB_MARK_MOVE: 796 case VTB_MARK_EXTEND: 797 vtbuf_flush_mark(vb); /* Clean old mark. */ 798 vb->vb_mark_end.tp_col = col; 799 vb->vb_mark_end.tp_row = vtbuf_wth(vb, row); 800 break; 801 case VTB_MARK_START: 802 vtbuf_flush_mark(vb); /* Clean old mark. */ 803 vb->vb_mark_start.tp_col = col; 804 vb->vb_mark_start.tp_row = vtbuf_wth(vb, row); 805 /* Start again, so clear end point. */ 806 vb->vb_mark_end.tp_col = col; 807 vb->vb_mark_end.tp_row = vtbuf_wth(vb, row); 808 break; 809 case VTB_MARK_WORD: 810 vtbuf_flush_mark(vb); /* Clean old mark. */ 811 vb->vb_mark_start.tp_row = vb->vb_mark_end.tp_row = 812 vtbuf_wth(vb, row); 813 r = vb->vb_rows[vb->vb_mark_start.tp_row]; 814 for (i = col; i >= 0; i --) { 815 if (TCHAR_CHARACTER(r[i]) == ' ') { 816 vb->vb_mark_start.tp_col = i + 1; 817 break; 818 } 819 } 820 for (i = col; i < vb->vb_scr_size.tp_col; i ++) { 821 if (TCHAR_CHARACTER(r[i]) == ' ') { 822 vb->vb_mark_end.tp_col = i; 823 break; 824 } 825 } 826 if (vb->vb_mark_start.tp_col > vb->vb_mark_end.tp_col) 827 vb->vb_mark_start.tp_col = vb->vb_mark_end.tp_col; 828 break; 829 case VTB_MARK_ROW: 830 vtbuf_flush_mark(vb); /* Clean old mark. */ 831 vb->vb_mark_start.tp_col = 0; 832 vb->vb_mark_end.tp_col = vb->vb_scr_size.tp_col; 833 vb->vb_mark_start.tp_row = vb->vb_mark_end.tp_row = 834 vtbuf_wth(vb, row); 835 break; 836 case VTB_MARK_NONE: 837 vb->vb_mark_last = type; 838 /* FALLTHROUGH */ 839 default: 840 /* panic? */ 841 return (0); 842 } 843 844 vb->vb_mark_last = type; 845 /* Draw new marked region. */ 846 vtbuf_flush_mark(vb); 847 return (1); 848 } 849 #endif 850 851 void 852 vtbuf_cursor_visibility(struct vt_buf *vb, int yes) 853 { 854 int oflags, nflags; 855 856 oflags = vb->vb_flags; 857 if (yes) 858 vb->vb_flags |= VBF_CURSOR; 859 else 860 vb->vb_flags &= ~VBF_CURSOR; 861 nflags = vb->vb_flags; 862 863 if (oflags != nflags) 864 vtbuf_dirty_cell(vb, &vb->vb_cursor); 865 } 866 867 void 868 vtbuf_scroll_mode(struct vt_buf *vb, int yes) 869 { 870 int oflags, nflags; 871 872 VTBUF_LOCK(vb); 873 oflags = vb->vb_flags; 874 if (yes) 875 vb->vb_flags |= VBF_SCROLL; 876 else 877 vb->vb_flags &= ~VBF_SCROLL; 878 nflags = vb->vb_flags; 879 880 if (oflags != nflags) 881 vtbuf_dirty_cell(vb, &vb->vb_cursor); 882 VTBUF_UNLOCK(vb); 883 } 884