1 /*- 2 * SPDX-License-Identifier: BSD-2-Clause 3 * 4 * Copyright (c) 2009, 2013 The FreeBSD Foundation 5 * 6 * This software was developed by Ed Schouten under sponsorship from the 7 * FreeBSD Foundation. 8 * 9 * Portions of this software were developed by Oleksandr Rybalko 10 * under sponsorship from the FreeBSD Foundation. 11 * 12 * Redistribution and use in source and binary forms, with or without 13 * modification, are permitted provided that the following conditions 14 * are met: 15 * 1. Redistributions of source code must retain the above copyright 16 * notice, this list of conditions and the following disclaimer. 17 * 2. Redistributions in binary form must reproduce the above copyright 18 * notice, this list of conditions and the following disclaimer in the 19 * documentation and/or other materials provided with the distribution. 20 * 21 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND 22 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 23 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 24 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 25 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 26 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 27 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 28 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 29 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 30 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 31 * SUCH DAMAGE. 32 */ 33 34 #include <sys/param.h> 35 #include <sys/systm.h> 36 #include <sys/kernel.h> 37 #include <sys/lock.h> 38 #include <sys/malloc.h> 39 #include <sys/mutex.h> 40 #include <sys/reboot.h> 41 42 #include <dev/vt/vt.h> 43 44 static MALLOC_DEFINE(M_VTBUF, "vtbuf", "vt buffer"); 45 46 #define VTBUF_LOCK(vb) mtx_lock_spin(&(vb)->vb_lock) 47 #define VTBUF_UNLOCK(vb) mtx_unlock_spin(&(vb)->vb_lock) 48 49 #define POS_INDEX(c, r) (((r) << 12) + (c)) 50 #define POS_COPY(d, s) do { \ 51 (d).tp_col = (s).tp_col; \ 52 (d).tp_row = (s).tp_row; \ 53 } while (0) 54 55 #ifndef SC_NO_CUTPASTE 56 static int vtbuf_htw(const struct vt_buf *vb, int row); 57 static int vtbuf_wth(const struct vt_buf *vb, int row); 58 static int vtbuf_in_this_range(int begin, int test, int end, int sz); 59 #endif 60 61 /* 62 * line4 63 * line5 <--- curroffset (terminal output to that line) 64 * line0 65 * line1 <--- roffset (history display from that point) 66 * line2 67 * line3 68 */ 69 int 70 vthistory_seek(struct vt_buf *vb, int offset, int whence) 71 { 72 int diff, top, bottom, roffset; 73 74 /* No scrolling if not enabled. */ 75 if ((vb->vb_flags & VBF_SCROLL) == 0) { 76 if (vb->vb_roffset != vb->vb_curroffset) { 77 vb->vb_roffset = vb->vb_curroffset; 78 return (0xffff); 79 } 80 return (0); /* No changes */ 81 } 82 83 /* "top" may be a negative integer. */ 84 bottom = vb->vb_curroffset; 85 top = (vb->vb_flags & VBF_HISTORY_FULL) ? 86 bottom + vb->vb_scr_size.tp_row - vb->vb_history_size : 87 0; 88 89 roffset = 0; /* Make gcc happy. */ 90 switch (whence) { 91 case VHS_SET: 92 if (offset < 0) 93 offset = 0; 94 roffset = top + offset; 95 break; 96 case VHS_CUR: 97 /* 98 * Operate on copy of offset value, since it temporary 99 * can be bigger than amount of rows in buffer. 100 */ 101 roffset = vb->vb_roffset; 102 if (roffset >= bottom + vb->vb_scr_size.tp_row) 103 roffset -= vb->vb_history_size; 104 105 roffset += offset; 106 roffset = MAX(roffset, top); 107 roffset = MIN(roffset, bottom); 108 109 if (roffset < 0) 110 roffset = vb->vb_history_size + roffset; 111 112 break; 113 case VHS_END: 114 /* Go to current offset. */ 115 roffset = vb->vb_curroffset; 116 break; 117 } 118 119 diff = vb->vb_roffset != roffset; 120 vb->vb_roffset = roffset; 121 122 return (diff); 123 } 124 125 void 126 vthistory_addlines(struct vt_buf *vb, int offset) 127 { 128 #ifndef SC_NO_CUTPASTE 129 int cur, sz; 130 #endif 131 132 vb->vb_curroffset += offset; 133 if (vb->vb_curroffset + vb->vb_scr_size.tp_row >= vb->vb_history_size) { 134 vb->vb_flags |= VBF_HISTORY_FULL; 135 vb->vb_curroffset %= vb->vb_history_size; 136 } 137 if ((vb->vb_flags & VBF_SCROLL) == 0) { 138 vb->vb_roffset = vb->vb_curroffset; 139 } 140 141 #ifndef SC_NO_CUTPASTE 142 sz = vb->vb_history_size; 143 cur = vb->vb_roffset + vb->vb_scr_size.tp_row + sz - 1; 144 if (vtbuf_in_this_range(cur, vb->vb_mark_start.tp_row, cur + offset, sz) || 145 vtbuf_in_this_range(cur, vb->vb_mark_end.tp_row, cur + offset, sz)) { 146 /* clear screen selection */ 147 vb->vb_mark_start.tp_row = vb->vb_mark_end.tp_row; 148 vb->vb_mark_start.tp_col = vb->vb_mark_end.tp_col; 149 } 150 #endif 151 } 152 153 void 154 vthistory_getpos(const struct vt_buf *vb, unsigned int *offset) 155 { 156 157 *offset = vb->vb_roffset; 158 } 159 160 #ifndef SC_NO_CUTPASTE /* Only mouse support use it now. */ 161 /* Translate history row to current view row number. */ 162 static int 163 vtbuf_htw(const struct vt_buf *vb, int row) 164 { 165 166 /* 167 * total 1000 rows. 168 * History offset roffset winrow 169 * 205 200 ((205 - 200 + 1000) % 1000) = 5 170 * 90 990 ((90 - 990 + 1000) % 1000) = 100 171 */ 172 return ((row - vb->vb_roffset + vb->vb_history_size) % 173 vb->vb_history_size); 174 } 175 176 /* Translate current view row number to history row. */ 177 static int 178 vtbuf_wth(const struct vt_buf *vb, int row) 179 { 180 181 return ((vb->vb_roffset + row) % vb->vb_history_size); 182 } 183 184 /* 185 * Test if an index in a circular buffer is within a range. 186 * 187 * begin - start index 188 * end - end index 189 * test - test index 190 * sz - size of circular buffer when it turns over 191 */ 192 static int 193 vtbuf_in_this_range(int begin, int test, int end, int sz) 194 { 195 196 begin %= sz; 197 end %= sz; 198 199 /* check for inversion */ 200 if (begin > end) 201 return (test >= begin || test < end); 202 else 203 return (test >= begin && test < end); 204 } 205 206 void 207 vtbuf_unmark(struct vt_buf *vb) 208 { 209 210 vtbuf_set_mark(vb, VTB_MARK_START, 0, 0); 211 } 212 213 void 214 vtbuf_unmark_on_cross(struct vt_buf *vb, int target_begin, int target_end) 215 { 216 int hsz, mb, me, tb, te; 217 218 tb = vtbuf_wth(vb, target_begin); 219 te = vtbuf_wth(vb, target_end); 220 mb = vb->vb_mark_start.tp_row; 221 me = vb->vb_mark_end.tp_row; 222 hsz = vb->vb_history_size; 223 224 /* 225 * Test intersection with vtbuf_in_this_range due to use of 226 * the circular buffer. 227 */ 228 if (vtbuf_in_this_range(tb, mb, te, hsz) || 229 vtbuf_in_this_range(tb, me, te, hsz) || 230 vtbuf_in_this_range(mb, tb, me, hsz) || 231 vtbuf_in_this_range(mb, te, me, hsz)) { 232 vtbuf_unmark(vb); 233 } 234 } 235 #endif 236 237 int 238 vtbuf_iscursor(const struct vt_buf *vb, int row, int col) 239 { 240 #ifndef SC_NO_CUTPASTE 241 int sc, sr, sz, ec, er, tmp; 242 #endif 243 244 if ((vb->vb_flags & (VBF_CURSOR|VBF_SCROLL)) == VBF_CURSOR && 245 (vb->vb_cursor.tp_row == row) && (vb->vb_cursor.tp_col == col)) 246 return (1); 247 248 #ifndef SC_NO_CUTPASTE 249 /* Mark cut/paste region. */ 250 if (vb->vb_mark_start.tp_col == vb->vb_mark_end.tp_col && 251 vb->vb_mark_start.tp_row == vb->vb_mark_end.tp_row) 252 return (0); 253 254 sc = vb->vb_mark_start.tp_col; 255 sr = vb->vb_mark_start.tp_row; 256 ec = vb->vb_mark_end.tp_col; 257 er = vb->vb_mark_end.tp_row; 258 259 /* 260 * Information about if the selection was made bottom-top or 261 * top-bottom is lost due to modulo arithmetics and needs to 262 * be recovered: 263 */ 264 sz = vb->vb_history_size; 265 tmp = (sz + er - sr) % sz; 266 row = vtbuf_wth(vb, row); 267 268 /* Swap start and end if start > end */ 269 if ((2 * tmp) > sz || (tmp == 0 && sc > ec)) { 270 tmp = sc; sc = ec; ec = tmp; 271 tmp = sr; sr = er; er = tmp; 272 } 273 274 if (vtbuf_in_this_range(POS_INDEX(sc, sr), POS_INDEX(col, row), 275 POS_INDEX(ec, er), POS_INDEX(0, sz))) 276 return (1); 277 #endif 278 279 return (0); 280 } 281 282 void 283 vtbuf_lock(struct vt_buf *vb) 284 { 285 286 VTBUF_LOCK(vb); 287 } 288 289 void 290 vtbuf_unlock(struct vt_buf *vb) 291 { 292 293 VTBUF_UNLOCK(vb); 294 } 295 296 void 297 vtbuf_dirty(struct vt_buf *vb, const term_rect_t *area) 298 { 299 300 if (vb->vb_dirtyrect.tr_begin.tp_row > area->tr_begin.tp_row) 301 vb->vb_dirtyrect.tr_begin.tp_row = area->tr_begin.tp_row; 302 if (vb->vb_dirtyrect.tr_begin.tp_col > area->tr_begin.tp_col) 303 vb->vb_dirtyrect.tr_begin.tp_col = area->tr_begin.tp_col; 304 if (vb->vb_dirtyrect.tr_end.tp_row < area->tr_end.tp_row) 305 vb->vb_dirtyrect.tr_end.tp_row = area->tr_end.tp_row; 306 if (vb->vb_dirtyrect.tr_end.tp_col < area->tr_end.tp_col) 307 vb->vb_dirtyrect.tr_end.tp_col = area->tr_end.tp_col; 308 } 309 310 static inline void 311 vtbuf_dirty_cell(struct vt_buf *vb, const term_pos_t *p) 312 { 313 term_rect_t area; 314 315 area.tr_begin = *p; 316 area.tr_end.tp_row = p->tp_row + 1; 317 area.tr_end.tp_col = p->tp_col + 1; 318 vtbuf_dirty(vb, &area); 319 } 320 321 static void 322 vtbuf_make_undirty(struct vt_buf *vb) 323 { 324 325 vb->vb_dirtyrect.tr_begin = vb->vb_scr_size; 326 vb->vb_dirtyrect.tr_end.tp_row = vb->vb_dirtyrect.tr_end.tp_col = 0; 327 } 328 329 void 330 vtbuf_undirty(struct vt_buf *vb, term_rect_t *r) 331 { 332 333 *r = vb->vb_dirtyrect; 334 vtbuf_make_undirty(vb); 335 } 336 337 void 338 vtbuf_copy(struct vt_buf *vb, const term_rect_t *r, const term_pos_t *p2) 339 { 340 const term_pos_t *p1 = &r->tr_begin; 341 term_rect_t area; 342 unsigned int rows, cols; 343 int pr, rdiff; 344 345 KASSERT(r->tr_begin.tp_row < vb->vb_scr_size.tp_row, 346 ("vtbuf_copy begin.tp_row %d must be less than screen width %d", 347 r->tr_begin.tp_row, vb->vb_scr_size.tp_row)); 348 KASSERT(r->tr_begin.tp_col < vb->vb_scr_size.tp_col, 349 ("vtbuf_copy begin.tp_col %d must be less than screen height %d", 350 r->tr_begin.tp_col, vb->vb_scr_size.tp_col)); 351 352 KASSERT(r->tr_end.tp_row <= vb->vb_scr_size.tp_row, 353 ("vtbuf_copy end.tp_row %d must be less than screen width %d", 354 r->tr_end.tp_row, vb->vb_scr_size.tp_row)); 355 KASSERT(r->tr_end.tp_col <= vb->vb_scr_size.tp_col, 356 ("vtbuf_copy end.tp_col %d must be less than screen height %d", 357 r->tr_end.tp_col, vb->vb_scr_size.tp_col)); 358 359 KASSERT(p2->tp_row < vb->vb_scr_size.tp_row, 360 ("vtbuf_copy tp_row %d must be less than screen width %d", 361 p2->tp_row, vb->vb_scr_size.tp_row)); 362 KASSERT(p2->tp_col < vb->vb_scr_size.tp_col, 363 ("vtbuf_copy tp_col %d must be less than screen height %d", 364 p2->tp_col, vb->vb_scr_size.tp_col)); 365 366 rows = r->tr_end.tp_row - r->tr_begin.tp_row; 367 rdiff = r->tr_begin.tp_row - p2->tp_row; 368 cols = r->tr_end.tp_col - r->tr_begin.tp_col; 369 if (r->tr_begin.tp_row > p2->tp_row && r->tr_begin.tp_col == 0 && 370 r->tr_end.tp_col == vb->vb_scr_size.tp_col && /* Full row. */ 371 (rows + rdiff) == vb->vb_scr_size.tp_row && /* Whole screen. */ 372 rdiff > 0) { /* Only forward direction. Do not eat history. */ 373 vthistory_addlines(vb, rdiff); 374 } else if (p2->tp_row < p1->tp_row) { 375 /* Handle overlapping copies of line segments. */ 376 /* Move data up. */ 377 for (pr = 0; pr < rows; pr++) 378 memmove( 379 &VTBUF_FIELD(vb, p2->tp_row + pr, p2->tp_col), 380 &VTBUF_FIELD(vb, p1->tp_row + pr, p1->tp_col), 381 cols * sizeof(term_char_t)); 382 } else { 383 /* Move data down. */ 384 for (pr = rows - 1; pr >= 0; pr--) 385 memmove( 386 &VTBUF_FIELD(vb, p2->tp_row + pr, p2->tp_col), 387 &VTBUF_FIELD(vb, p1->tp_row + pr, p1->tp_col), 388 cols * sizeof(term_char_t)); 389 } 390 391 area.tr_begin = *p2; 392 area.tr_end.tp_row = MIN(p2->tp_row + rows, vb->vb_scr_size.tp_row); 393 area.tr_end.tp_col = MIN(p2->tp_col + cols, vb->vb_scr_size.tp_col); 394 vtbuf_dirty(vb, &area); 395 } 396 397 static void 398 vtbuf_do_fill(struct vt_buf *vb, const term_rect_t *r, term_char_t c) 399 { 400 unsigned int pr, pc; 401 term_char_t *row; 402 403 for (pr = r->tr_begin.tp_row; pr < r->tr_end.tp_row; pr++) { 404 row = vb->vb_rows[(vb->vb_curroffset + pr) % 405 VTBUF_MAX_HEIGHT(vb)]; 406 for (pc = r->tr_begin.tp_col; pc < r->tr_end.tp_col; pc++) { 407 row[pc] = c; 408 } 409 } 410 } 411 412 void 413 vtbuf_fill(struct vt_buf *vb, const term_rect_t *r, term_char_t c) 414 { 415 416 KASSERT(r->tr_begin.tp_row < vb->vb_scr_size.tp_row, 417 ("vtbuf_fill begin.tp_row %d must be < screen height %d", 418 r->tr_begin.tp_row, vb->vb_scr_size.tp_row)); 419 KASSERT(r->tr_begin.tp_col < vb->vb_scr_size.tp_col, 420 ("vtbuf_fill begin.tp_col %d must be < screen width %d", 421 r->tr_begin.tp_col, vb->vb_scr_size.tp_col)); 422 423 KASSERT(r->tr_end.tp_row <= vb->vb_scr_size.tp_row, 424 ("vtbuf_fill end.tp_row %d must be <= screen height %d", 425 r->tr_end.tp_row, vb->vb_scr_size.tp_row)); 426 KASSERT(r->tr_end.tp_col <= vb->vb_scr_size.tp_col, 427 ("vtbuf_fill end.tp_col %d must be <= screen width %d", 428 r->tr_end.tp_col, vb->vb_scr_size.tp_col)); 429 430 vtbuf_do_fill(vb, r, c); 431 vtbuf_dirty(vb, r); 432 } 433 434 static void 435 vtbuf_init_rows(struct vt_buf *vb) 436 { 437 int r; 438 439 vb->vb_history_size = MAX(vb->vb_history_size, vb->vb_scr_size.tp_row); 440 441 for (r = 0; r < vb->vb_history_size; r++) 442 vb->vb_rows[r] = &vb->vb_buffer[r * vb->vb_scr_size.tp_col]; 443 } 444 445 static void 446 vtbuf_do_clearhistory(struct vt_buf *vb) 447 { 448 term_rect_t rect; 449 const teken_attr_t *a; 450 term_char_t ch; 451 452 a = teken_get_curattr(&vb->vb_terminal->tm_emulator); 453 ch = TCOLOR_FG(a->ta_fgcolor) | TCOLOR_BG(a->ta_bgcolor); 454 455 rect.tr_begin.tp_row = rect.tr_begin.tp_col = 0; 456 rect.tr_end.tp_col = vb->vb_scr_size.tp_col; 457 rect.tr_end.tp_row = vb->vb_history_size; 458 459 vtbuf_do_fill(vb, &rect, VTBUF_SPACE_CHAR(ch)); 460 } 461 462 static void 463 vtbuf_reset_scrollback(struct vt_buf *vb) 464 { 465 vb->vb_roffset = 0; 466 vb->vb_curroffset = 0; 467 vb->vb_mark_start.tp_row = 0; 468 vb->vb_mark_start.tp_col = 0; 469 vb->vb_mark_end.tp_row = 0; 470 vb->vb_mark_end.tp_col = 0; 471 } 472 473 void 474 vtbuf_init_early(struct vt_buf *vb) 475 { 476 vb->vb_flags |= VBF_CURSOR; 477 vtbuf_reset_scrollback(vb); 478 vtbuf_init_rows(vb); 479 vtbuf_do_clearhistory(vb); 480 vtbuf_make_undirty(vb); 481 if ((vb->vb_flags & VBF_MTX_INIT) == 0) { 482 mtx_init(&vb->vb_lock, "vtbuf", NULL, MTX_SPIN); 483 vb->vb_flags |= VBF_MTX_INIT; 484 } 485 } 486 487 void 488 vtbuf_init(struct vt_buf *vb, const term_pos_t *p) 489 { 490 int sz; 491 492 vb->vb_scr_size = *p; 493 vb->vb_history_size = VBF_DEFAULT_HISTORY_SIZE; 494 495 if ((vb->vb_flags & VBF_STATIC) == 0) { 496 sz = vb->vb_history_size * p->tp_col * sizeof(term_char_t); 497 vb->vb_buffer = malloc(sz, M_VTBUF, M_WAITOK | M_ZERO); 498 499 sz = vb->vb_history_size * sizeof(term_char_t *); 500 vb->vb_rows = malloc(sz, M_VTBUF, M_WAITOK | M_ZERO); 501 } 502 503 vtbuf_init_early(vb); 504 } 505 506 void 507 vtbuf_clearhistory(struct vt_buf *vb) 508 { 509 VTBUF_LOCK(vb); 510 vtbuf_do_clearhistory(vb); 511 vtbuf_reset_scrollback(vb); 512 vb->vb_flags &= ~VBF_HISTORY_FULL; 513 VTBUF_UNLOCK(vb); 514 } 515 516 void 517 vtbuf_sethistory_size(struct vt_buf *vb, unsigned int size) 518 { 519 term_pos_t p; 520 521 /* With same size */ 522 p.tp_row = vb->vb_scr_size.tp_row; 523 p.tp_col = vb->vb_scr_size.tp_col; 524 vtbuf_grow(vb, &p, size); 525 } 526 527 void 528 vtbuf_grow(struct vt_buf *vb, const term_pos_t *p, unsigned int history_size) 529 { 530 term_char_t *old, *new, **rows, **oldrows, **copyrows, *row, *oldrow; 531 unsigned int w, h, c, r, old_history_size; 532 int history_full; 533 const teken_attr_t *a; 534 term_char_t ch; 535 536 a = teken_get_curattr(&vb->vb_terminal->tm_emulator); 537 ch = TCOLOR_FG(a->ta_fgcolor) | TCOLOR_BG(a->ta_bgcolor); 538 539 history_size = MAX(history_size, p->tp_row); 540 541 /* Allocate new buffer. */ 542 new = mallocarray(history_size, p->tp_col * sizeof(term_char_t), 543 M_VTBUF, M_WAITOK | M_ZERO); 544 rows = mallocarray(history_size, sizeof(term_pos_t *), M_VTBUF, 545 M_WAITOK | M_ZERO); 546 547 /* Toggle it. */ 548 VTBUF_LOCK(vb); 549 old = vb->vb_flags & VBF_STATIC ? NULL : vb->vb_buffer; 550 oldrows = vb->vb_flags & VBF_STATIC ? NULL : vb->vb_rows; 551 copyrows = vb->vb_rows; 552 553 w = vb->vb_scr_size.tp_col; 554 h = vb->vb_scr_size.tp_row; 555 old_history_size = vb->vb_history_size; 556 history_full = vb->vb_flags & VBF_HISTORY_FULL || 557 vb->vb_curroffset + h >= history_size; 558 559 vb->vb_history_size = history_size; 560 vb->vb_buffer = new; 561 vb->vb_rows = rows; 562 vb->vb_flags &= ~VBF_STATIC; 563 vb->vb_scr_size = *p; 564 vtbuf_init_rows(vb); 565 566 /* 567 * Copy rows to the new buffer. The first row in the history 568 * is back to index 0, ie. the new buffer doesn't cycle. 569 */ 570 if (history_size > old_history_size) { 571 for (r = 0; r < old_history_size; r++) { 572 row = rows[r]; 573 574 /* Compute the corresponding row in the old buffer. */ 575 if (history_full) 576 /* 577 * The buffer is full, the "top" row is 578 * the one just after the viewable area 579 * (curroffset + viewable height) in the 580 * cycling buffer. The corresponding row 581 * is computed from this top row. 582 */ 583 oldrow = copyrows[ 584 (vb->vb_curroffset + h + r) % 585 old_history_size]; 586 else 587 /* 588 * The buffer is not full, therefore, 589 * we didn't cycle already. The 590 * corresponding rows are the same in 591 * both buffers. 592 */ 593 oldrow = copyrows[r]; 594 595 memmove(row, oldrow, 596 MIN(p->tp_col, w) * sizeof(term_char_t)); 597 598 /* 599 * XXX VTBUF_SPACE_CHAR(TERMINAL_NORM_ATTR) will 600 * extended lines of kernel text using the wrong 601 * background color. 602 */ 603 for (c = MIN(p->tp_col, w); c < p->tp_col; c++) { 604 row[c] = VTBUF_SPACE_CHAR(ch); 605 } 606 } 607 608 /* Fill remaining rows. */ 609 for (r = old_history_size; r < history_size; r++) { 610 row = rows[r]; 611 for (c = MIN(p->tp_col, w); c < p->tp_col; c++) { 612 row[c] = VTBUF_SPACE_CHAR(ch); 613 } 614 } 615 616 vb->vb_flags &= ~VBF_HISTORY_FULL; 617 618 /* 619 * If the screen is already filled (there are non-visible lines 620 * above the current viewable area), adjust curroffset to the 621 * new viewable area. 622 * 623 * If the old buffer was full, set curroffset to the 624 * <h>th most recent line of history in the new, non-cycled 625 * buffer. Otherwise, it didn't cycle, so the old curroffset 626 * is the same in the new buffer. 627 */ 628 if (history_full) 629 vb->vb_curroffset = old_history_size - h; 630 } else { 631 /* 632 * (old_history_size - history_size) lines of history are 633 * dropped. 634 */ 635 for (r = 0; r < history_size; r++) { 636 row = rows[r]; 637 638 /* 639 * Compute the corresponding row in the old buffer. 640 * 641 * See the equivalent if{} block above for an 642 * explanation. 643 */ 644 if (history_full) 645 oldrow = copyrows[ 646 (vb->vb_curroffset + h + r + 647 (old_history_size - history_size)) % 648 old_history_size]; 649 else 650 oldrow = copyrows[r]; 651 652 memmove(row, oldrow, 653 MIN(p->tp_col, w) * sizeof(term_char_t)); 654 655 /* 656 * XXX VTBUF_SPACE_CHAR(TERMINAL_NORM_ATTR) will 657 * extended lines of kernel text using the wrong 658 * background color. 659 */ 660 for (c = MIN(p->tp_col, w); c < p->tp_col; c++) { 661 row[c] = VTBUF_SPACE_CHAR(ch); 662 } 663 } 664 665 if (history_full) { 666 vb->vb_curroffset = history_size - h; 667 vb->vb_flags |= VBF_HISTORY_FULL; 668 } 669 } 670 671 vb->vb_roffset = vb->vb_curroffset; 672 673 /* Adjust cursor position. */ 674 if (vb->vb_cursor.tp_col > p->tp_col - 1) 675 /* 676 * Move cursor to the last column, in case its previous 677 * position is outside of the new screen area. 678 */ 679 vb->vb_cursor.tp_col = p->tp_col - 1; 680 681 if (vb->vb_curroffset > 0 || vb->vb_cursor.tp_row > p->tp_row - 1) 682 /* Move cursor to the last line on the screen. */ 683 vb->vb_cursor.tp_row = p->tp_row - 1; 684 685 VTBUF_UNLOCK(vb); 686 687 /* Deallocate old buffer. */ 688 free(old, M_VTBUF); 689 free(oldrows, M_VTBUF); 690 } 691 692 void 693 vtbuf_putchar(struct vt_buf *vb, const term_pos_t *p, term_char_t c) 694 { 695 term_char_t *row; 696 697 KASSERT(p->tp_row < vb->vb_scr_size.tp_row, 698 ("vtbuf_putchar tp_row %d must be less than screen width %d", 699 p->tp_row, vb->vb_scr_size.tp_row)); 700 KASSERT(p->tp_col < vb->vb_scr_size.tp_col, 701 ("vtbuf_putchar tp_col %d must be less than screen height %d", 702 p->tp_col, vb->vb_scr_size.tp_col)); 703 704 row = vb->vb_rows[(vb->vb_curroffset + p->tp_row) % 705 VTBUF_MAX_HEIGHT(vb)]; 706 if (row[p->tp_col] != c) { 707 row[p->tp_col] = c; 708 vtbuf_dirty_cell(vb, p); 709 } 710 } 711 712 void 713 vtbuf_cursor_position(struct vt_buf *vb, const term_pos_t *p) 714 { 715 if (vb->vb_flags & VBF_CURSOR) { 716 vtbuf_dirty_cell(vb, &vb->vb_cursor); 717 vb->vb_cursor = *p; 718 vtbuf_dirty_cell(vb, &vb->vb_cursor); 719 } else { 720 vb->vb_cursor = *p; 721 } 722 } 723 724 #ifndef SC_NO_CUTPASTE 725 static void 726 vtbuf_flush_mark(struct vt_buf *vb) 727 { 728 term_rect_t area; 729 int s, e; 730 731 /* Notify renderer to update marked region. */ 732 if ((vb->vb_mark_start.tp_col != vb->vb_mark_end.tp_col) || 733 (vb->vb_mark_start.tp_row != vb->vb_mark_end.tp_row)) { 734 s = vtbuf_htw(vb, vb->vb_mark_start.tp_row); 735 e = vtbuf_htw(vb, vb->vb_mark_end.tp_row); 736 737 area.tr_begin.tp_col = 0; 738 area.tr_begin.tp_row = MIN(s, e); 739 740 area.tr_end.tp_col = vb->vb_scr_size.tp_col; 741 area.tr_end.tp_row = MAX(s, e) + 1; 742 743 VTBUF_LOCK(vb); 744 vtbuf_dirty(vb, &area); 745 VTBUF_UNLOCK(vb); 746 } 747 } 748 749 int 750 vtbuf_get_marked_len(struct vt_buf *vb) 751 { 752 int ei, si, sz; 753 term_pos_t s, e; 754 755 /* Swap according to window coordinates. */ 756 if (POS_INDEX(vtbuf_htw(vb, vb->vb_mark_start.tp_row), 757 vb->vb_mark_start.tp_col) > 758 POS_INDEX(vtbuf_htw(vb, vb->vb_mark_end.tp_row), 759 vb->vb_mark_end.tp_col)) { 760 POS_COPY(e, vb->vb_mark_start); 761 POS_COPY(s, vb->vb_mark_end); 762 } else { 763 POS_COPY(s, vb->vb_mark_start); 764 POS_COPY(e, vb->vb_mark_end); 765 } 766 767 si = s.tp_row * vb->vb_scr_size.tp_col + s.tp_col; 768 ei = e.tp_row * vb->vb_scr_size.tp_col + e.tp_col; 769 770 /* Number symbols and number of rows to inject \r */ 771 sz = ei - si + (1 + e.tp_row - s.tp_row); 772 773 return (sz * sizeof(term_char_t)); 774 } 775 776 static bool 777 tchar_is_word_separator(term_char_t ch) 778 { 779 /* List of unicode word separator characters: */ 780 switch (TCHAR_CHARACTER(ch)) { 781 case 0x0020: /* SPACE */ 782 case 0x180E: /* MONGOLIAN VOWEL SEPARATOR */ 783 case 0x2002: /* EN SPACE (nut) */ 784 case 0x2003: /* EM SPACE (mutton) */ 785 case 0x2004: /* THREE-PER-EM SPACE (thick space) */ 786 case 0x2005: /* FOUR-PER-EM SPACE (mid space) */ 787 case 0x2006: /* SIX-PER-EM SPACE */ 788 case 0x2008: /* PUNCTUATION SPACE */ 789 case 0x2009: /* THIN SPACE */ 790 case 0x200A: /* HAIR SPACE */ 791 case 0x200B: /* ZERO WIDTH SPACE */ 792 case 0x3000: /* IDEOGRAPHIC SPACE */ 793 return (true); 794 default: 795 return (false); 796 } 797 } 798 799 void 800 vtbuf_extract_marked(struct vt_buf *vb, term_char_t *buf, int sz, int mark) 801 { 802 int i, j, r, c, cs, ce; 803 term_pos_t s, e; 804 805 /* Swap according to window coordinates. */ 806 if (POS_INDEX(vtbuf_htw(vb, vb->vb_mark_start.tp_row), 807 vb->vb_mark_start.tp_col) > 808 POS_INDEX(vtbuf_htw(vb, vb->vb_mark_end.tp_row), 809 vb->vb_mark_end.tp_col)) { 810 POS_COPY(e, vb->vb_mark_start); 811 POS_COPY(s, vb->vb_mark_end); 812 } else { 813 POS_COPY(s, vb->vb_mark_start); 814 POS_COPY(e, vb->vb_mark_end); 815 } 816 817 i = 0; 818 for (r = s.tp_row; r <= e.tp_row; r++) { 819 cs = (r == s.tp_row)?s.tp_col:0; 820 ce = (r == e.tp_row)?e.tp_col:vb->vb_scr_size.tp_col; 821 822 /* Copy characters from terminal window. */ 823 j = i; 824 for (c = cs; c < ce; c++) 825 buf[i++] = vb->vb_rows[r][c]; 826 827 /* For all rows, but the last one. */ 828 if (r != e.tp_row || mark == VTB_MARK_ROW) { 829 /* Trim trailing word separators, if any. */ 830 for (; i != j; i--) { 831 if (!tchar_is_word_separator(buf[i - 1])) 832 break; 833 } 834 /* Add newline character as expected by TTY. */ 835 buf[i++] = '\r'; 836 } 837 } 838 /* Zero rest of expected buffer size, if any. */ 839 while ((i * sizeof(buf[0])) < sz) 840 buf[i++] = '\0'; 841 842 MPASS((i * sizeof(buf[0])) == sz); 843 } 844 845 int 846 vtbuf_set_mark(struct vt_buf *vb, int type, int col, int row) 847 { 848 term_char_t *r; 849 int i; 850 851 switch (type) { 852 case VTB_MARK_END: /* B1 UP */ 853 if (vb->vb_mark_last != VTB_MARK_MOVE) 854 return (0); 855 /* FALLTHROUGH */ 856 case VTB_MARK_MOVE: 857 case VTB_MARK_EXTEND: 858 vtbuf_flush_mark(vb); /* Clean old mark. */ 859 vb->vb_mark_end.tp_col = col; 860 vb->vb_mark_end.tp_row = vtbuf_wth(vb, row); 861 break; 862 case VTB_MARK_START: 863 vtbuf_flush_mark(vb); /* Clean old mark. */ 864 vb->vb_mark_start.tp_col = col; 865 vb->vb_mark_start.tp_row = vtbuf_wth(vb, row); 866 /* Start again, so clear end point. */ 867 vb->vb_mark_end.tp_col = col; 868 vb->vb_mark_end.tp_row = vtbuf_wth(vb, row); 869 break; 870 case VTB_MARK_WORD: 871 vtbuf_flush_mark(vb); /* Clean old mark. */ 872 vb->vb_mark_start.tp_row = vb->vb_mark_end.tp_row = 873 vtbuf_wth(vb, row); 874 r = vb->vb_rows[vb->vb_mark_start.tp_row]; 875 for (i = col; i >= 0; i --) { 876 if (tchar_is_word_separator(r[i])) { 877 vb->vb_mark_start.tp_col = i + 1; 878 break; 879 } 880 } 881 /* No space - word extends to beginning of line. */ 882 if (i == -1) 883 vb->vb_mark_start.tp_col = 0; 884 for (i = col; i < vb->vb_scr_size.tp_col; i++) { 885 if (tchar_is_word_separator(r[i])) { 886 vb->vb_mark_end.tp_col = i; 887 break; 888 } 889 } 890 /* No space - word extends to end of line. */ 891 if (i == vb->vb_scr_size.tp_col) 892 vb->vb_mark_end.tp_col = i; 893 894 if (vb->vb_mark_start.tp_col > vb->vb_mark_end.tp_col) 895 vb->vb_mark_start.tp_col = vb->vb_mark_end.tp_col; 896 break; 897 case VTB_MARK_ROW: 898 vtbuf_flush_mark(vb); /* Clean old mark. */ 899 vb->vb_mark_start.tp_col = 0; 900 vb->vb_mark_end.tp_col = vb->vb_scr_size.tp_col; 901 vb->vb_mark_start.tp_row = vb->vb_mark_end.tp_row = 902 vtbuf_wth(vb, row); 903 break; 904 case VTB_MARK_NONE: 905 vb->vb_mark_last = type; 906 /* FALLTHROUGH */ 907 default: 908 /* panic? */ 909 return (0); 910 } 911 912 vb->vb_mark_last = type; 913 /* Draw new marked region. */ 914 vtbuf_flush_mark(vb); 915 return (1); 916 } 917 #endif 918 919 void 920 vtbuf_cursor_visibility(struct vt_buf *vb, int yes) 921 { 922 int oflags, nflags; 923 924 oflags = vb->vb_flags; 925 if (yes) 926 vb->vb_flags |= VBF_CURSOR; 927 else 928 vb->vb_flags &= ~VBF_CURSOR; 929 nflags = vb->vb_flags; 930 931 if (oflags != nflags) 932 vtbuf_dirty_cell(vb, &vb->vb_cursor); 933 } 934 935 void 936 vtbuf_scroll_mode(struct vt_buf *vb, int yes) 937 { 938 int oflags, nflags; 939 940 VTBUF_LOCK(vb); 941 oflags = vb->vb_flags; 942 if (yes) 943 vb->vb_flags |= VBF_SCROLL; 944 else 945 vb->vb_flags &= ~VBF_SCROLL; 946 nflags = vb->vb_flags; 947 948 if (oflags != nflags) 949 vtbuf_dirty_cell(vb, &vb->vb_cursor); 950 VTBUF_UNLOCK(vb); 951 } 952