screen.c

   1 /* $OpenBSD$ */
   2
   3 /*
   4  * Copyright (c) 2007 Nicholas Marriott <nicholas.marriott@gmail.com>
   5  *
   6  * Permission to use, copy, modify, and distribute this software for any
   7  * purpose with or without fee is hereby granted, provided that the above
   8  * copyright notice and this permission notice appear in all copies.
   9  *
  10  * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
  11  * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
  12  * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
  13  * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
  14  * WHATSOEVER RESULTING FROM LOSS OF MIND, USE, DATA OR PROFITS, WHETHER
  15  * IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING
  16  * OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
  17  */
  18
  19 #include <sys/types.h>
  20
  21 #include <stdlib.h>
  22 #include <string.h>
  23 #include <unistd.h>
  24 #include <vis.h>
  25
  26 #include "tmux.h"
  27
  28 /* Selected area in screen. */
  29 struct screen_sel {
  30         int              hidden;
  31         int              rectangle;
  32         int              modekeys;
  33
  34         u_int            sx;
  35         u_int            sy;
  36
  37         u_int            ex;
  38         u_int            ey;
  39
  40         struct grid_cell cell;
  41 };
  42
  43 /* Entry on title stack. */
  44 struct screen_title_entry {
  45         char                            *text;
  46
  47         TAILQ_ENTRY(screen_title_entry)  entry;
  48 };
  49 TAILQ_HEAD(screen_titles, screen_title_entry);
  50
  51 static void     screen_resize_y(struct screen *, u_int, int, u_int *);
  52 static void     screen_reflow(struct screen *, u_int, u_int *, u_int *, int);
  53
  54 /* Free titles stack. */
  55 static void
  56 screen_free_titles(struct screen *s)
  57 {
  58         struct screen_title_entry       *title_entry;
  59
  60         if (s->titles == NULL)
  61                 return;
  62
  63         while ((title_entry = TAILQ_FIRST(s->titles)) != NULL) {
  64                 TAILQ_REMOVE(s->titles, title_entry, entry);
  65                 free(title_entry->text);
  66                 free(title_entry);
  67         }
  68
  69         free(s->titles);
  70         s->titles = NULL;
  71 }
  72
  73 /* Create a new screen. */
  74 void
  75 screen_init(struct screen *s, u_int sx, u_int sy, u_int hlimit)
  76 {
  77         s->grid = grid_create(sx, sy, hlimit);
  78         s->saved_grid = NULL;
  79
  80         s->title = xstrdup("");
  81         s->titles = NULL;
  82         s->path = NULL;
  83
  84         s->cstyle = SCREEN_CURSOR_DEFAULT;
  85         s->default_cstyle = SCREEN_CURSOR_DEFAULT;
  86         s->mode = MODE_CURSOR;
  87         s->default_mode = 0;
  88         s->ccolour = -1;
  89         s->default_ccolour = -1;
  90         s->tabs = NULL;
  91         s->sel = NULL;
  92
  93         s->write_list = NULL;
  94         s->hyperlinks = NULL;
  95
  96         screen_reinit(s);
  97 }
  98
  99 /* Reinitialise screen. */
 100 void
 101 screen_reinit(struct screen *s)
 102 {
 103         s->cx = 0;
 104         s->cy = 0;
 105
 106         s->rupper = 0;
 107         s->rlower = screen_size_y(s) - 1;
 108
 109         s->mode = MODE_CURSOR|MODE_WRAP|(s->mode & MODE_CRLF);
 110         if (options_get_number(global_options, "extended-keys") == 2)
 111                 s->mode |= MODE_KEXTENDED;
 112
 113         if (s->saved_grid != NULL)
 114                 screen_alternate_off(s, NULL, 0);
 115         s->saved_cx = UINT_MAX;
 116         s->saved_cy = UINT_MAX;
 117
 118         screen_reset_tabs(s);
 119
 120         grid_clear_lines(s->grid, s->grid->hsize, s->grid->sy, 8);
 121
 122         screen_clear_selection(s);
 123         screen_free_titles(s);
 124         screen_reset_hyperlinks(s);
 125 }
 126
 127 /* Reset hyperlinks of a screen. */
 128 void
 129 screen_reset_hyperlinks(struct screen *s)
 130 {
 131         if (s->hyperlinks == NULL)
 132                 s->hyperlinks = hyperlinks_init();
 133         else
 134                 hyperlinks_reset(s->hyperlinks);
 135 }
 136
 137 /* Destroy a screen. */
 138 void
 139 screen_free(struct screen *s)
 140 {
 141         free(s->sel);
 142         free(s->tabs);
 143         free(s->path);
 144         free(s->title);
 145
 146         if (s->write_list != NULL)
 147                 screen_write_free_list(s);
 148
 149         if (s->saved_grid != NULL)
 150                 grid_destroy(s->saved_grid);
 151         grid_destroy(s->grid);
 152
 153         if (s->hyperlinks != NULL)
 154                 hyperlinks_free(s->hyperlinks);
 155         screen_free_titles(s);
 156 }
 157
 158 /* Reset tabs to default, eight spaces apart. */
 159 void
 160 screen_reset_tabs(struct screen *s)
 161 {
 162         u_int   i;
 163
 164         free(s->tabs);
 165
 166         if ((s->tabs = bit_alloc(screen_size_x(s))) == NULL)
 167                 fatal("bit_alloc failed");
 168         for (i = 8; i < screen_size_x(s); i += 8)
 169                 bit_set(s->tabs, i);
 170 }
 171
 172 /* Set screen cursor style and mode. */
 173 void
 174 screen_set_cursor_style(u_int style, enum screen_cursor_style *cstyle,
 175     int *mode)
 176 {
 177         switch (style) {
 178         case 0:
 179                 *cstyle = SCREEN_CURSOR_DEFAULT;
 180                 break;
 181         case 1:
 182                 *cstyle = SCREEN_CURSOR_BLOCK;
 183                 *mode |= MODE_CURSOR_BLINKING;
 184                 break;
 185         case 2:
 186                 *cstyle = SCREEN_CURSOR_BLOCK;
 187                 *mode &= ~MODE_CURSOR_BLINKING;
 188                 break;
 189         case 3:
 190                 *cstyle = SCREEN_CURSOR_UNDERLINE;
 191                 *mode |= MODE_CURSOR_BLINKING;
 192                 break;
 193         case 4:
 194                 *cstyle = SCREEN_CURSOR_UNDERLINE;
 195                 *mode &= ~MODE_CURSOR_BLINKING;
 196                 break;
 197         case 5:
 198                 *cstyle = SCREEN_CURSOR_BAR;
 199                 *mode |= MODE_CURSOR_BLINKING;
 200                 break;
 201         case 6:
 202                 *cstyle = SCREEN_CURSOR_BAR;
 203                 *mode &= ~MODE_CURSOR_BLINKING;
 204                 break;
 205         }
 206 }
 207
 208 /* Set screen cursor colour. */
 209 void
 210 screen_set_cursor_colour(struct screen *s, int colour)
 211 {
 212         s->ccolour = colour;
 213 }
 214
 215 /* Set screen title. */
 216 int
 217 screen_set_title(struct screen *s, const char *title)
 218 {
 219         if (!utf8_isvalid(title))
 220                 return (0);
 221         free(s->title);
 222         s->title = xstrdup(title);
 223         return (1);
 224 }
 225
 226 /* Set screen path. */
 227 void
 228 screen_set_path(struct screen *s, const char *path)
 229 {
 230         free(s->path);
 231         utf8_stravis(&s->path, path, VIS_OCTAL|VIS_CSTYLE|VIS_TAB|VIS_NL);
 232 }
 233
 234 /* Push the current title onto the stack. */
 235 void
 236 screen_push_title(struct screen *s)
 237 {
 238         struct screen_title_entry *title_entry;
 239
 240         if (s->titles == NULL) {
 241                 s->titles = xmalloc(sizeof *s->titles);
 242                 TAILQ_INIT(s->titles);
 243         }
 244         title_entry = xmalloc(sizeof *title_entry);
 245         title_entry->text = xstrdup(s->title);
 246         TAILQ_INSERT_HEAD(s->titles, title_entry, entry);
 247 }
 248
 249 /*
 250  * Pop a title from the stack and set it as the screen title. If the stack is
 251  * empty, do nothing.
 252  */
 253 void
 254 screen_pop_title(struct screen *s)
 255 {
 256         struct screen_title_entry *title_entry;
 257
 258         if (s->titles == NULL)
 259                 return;
 260
 261         title_entry = TAILQ_FIRST(s->titles);
 262         if (title_entry != NULL) {
 263                 screen_set_title(s, title_entry->text);
 264
 265                 TAILQ_REMOVE(s->titles, title_entry, entry);
 266                 free(title_entry->text);
 267                 free(title_entry);
 268         }
 269 }
 270
 271 /* Resize screen with options. */
 272 void
 273 screen_resize_cursor(struct screen *s, u_int sx, u_int sy, int reflow,
 274     int eat_empty, int cursor)
 275 {
 276         u_int   cx = s->cx, cy = s->grid->hsize + s->cy;
 277
 278         if (s->write_list != NULL)
 279                 screen_write_free_list(s);
 280
 281         log_debug("%s: new size %ux%u, now %ux%u (cursor %u,%u = %u,%u)",
 282             __func__, sx, sy, screen_size_x(s), screen_size_y(s), s->cx, s->cy,
 283             cx, cy);
 284
 285         if (sx < 1)
 286                 sx = 1;
 287         if (sy < 1)
 288                 sy = 1;
 289
 290         if (sx != screen_size_x(s)) {
 291                 s->grid->sx = sx;
 292                 screen_reset_tabs(s);
 293         } else
 294                 reflow = 0;
 295
 296         if (sy != screen_size_y(s))
 297                 screen_resize_y(s, sy, eat_empty, &cy);
 298
 299         if (reflow)
 300                 screen_reflow(s, sx, &cx, &cy, cursor);
 301
 302         if (cy >= s->grid->hsize) {
 303                 s->cx = cx;
 304                 s->cy = cy - s->grid->hsize;
 305         } else {
 306                 s->cx = 0;
 307                 s->cy = 0;
 308         }
 309
 310         log_debug("%s: cursor finished at %u,%u = %u,%u", __func__, s->cx,
 311             s->cy, cx, cy);
 312
 313         if (s->write_list != NULL)
 314                 screen_write_make_list(s);
 315 }
 316
 317 /* Resize screen. */
 318 void
 319 screen_resize(struct screen *s, u_int sx, u_int sy, int reflow)
 320 {
 321         screen_resize_cursor(s, sx, sy, reflow, 1, 1);
 322 }
 323
 324 static void
 325 screen_resize_y(struct screen *s, u_int sy, int eat_empty, u_int *cy)
 326 {
 327         struct grid     *gd = s->grid;
 328         u_int            needed, available, oldy, i;
 329
 330         if (sy == 0)
 331                 fatalx("zero size");
 332         oldy = screen_size_y(s);
 333
 334         /*
 335          * When resizing:
 336          *
 337          * If the height is decreasing, delete lines from the bottom until
 338          * hitting the cursor, then push lines from the top into the history.
 339          *
 340          * When increasing, pull as many lines as possible from scrolled
 341          * history (not explicitly cleared from view) to the top, then fill the
 342          * remaining with blanks at the bottom.
 343          */
 344
 345         /* Size decreasing. */
 346         if (sy < oldy) {
 347                 needed = oldy - sy;
 348
 349                 /* Delete as many lines as possible from the bottom. */
 350                 if (eat_empty) {
 351                         available = oldy - 1 - s->cy;
 352                         if (available > 0) {
 353                                 if (available > needed)
 354                                         available = needed;
 355                                 grid_view_delete_lines(gd, oldy - available,
 356                                     available, 8);
 357                         }
 358                         needed -= available;
 359                 }
 360
 361                 /*
 362                  * Now just increase the history size, if possible, to take
 363                  * over the lines which are left. If history is off, delete
 364                  * lines from the top.
 365                  */
 366                 available = s->cy;
 367                 if (gd->flags & GRID_HISTORY) {
 368                         gd->hscrolled += needed;
 369                         gd->hsize += needed;
 370                 } else if (needed > 0 && available > 0) {
 371                         if (available > needed)
 372                                 available = needed;
 373                         grid_view_delete_lines(gd, 0, available, 8);
 374                         (*cy) -= available;
 375                 }
 376         }
 377
 378         /* Resize line array. */
 379         grid_adjust_lines(gd, gd->hsize + sy);
 380
 381         /* Size increasing. */
 382         if (sy > oldy) {
 383                 needed = sy - oldy;
 384
 385                 /*
 386                  * Try to pull as much as possible out of scrolled history, if
 387                  * it is enabled.
 388                  */
 389                 available = gd->hscrolled;
 390                 if (gd->flags & GRID_HISTORY && available > 0) {
 391                         if (available > needed)
 392                                 available = needed;
 393                         gd->hscrolled -= available;
 394                         gd->hsize -= available;
 395                 } else
 396                         available = 0;
 397                 needed -= available;
 398
 399                 /* Then fill the rest in with blanks. */
 400                 for (i = gd->hsize + sy - needed; i < gd->hsize + sy; i++)
 401                         grid_empty_line(gd, i, 8);
 402         }
 403
 404         /* Set the new size, and reset the scroll region. */
 405         gd->sy = sy;
 406         s->rupper = 0;
 407         s->rlower = screen_size_y(s) - 1;
 408 }
 409
 410 /* Set selection. */
 411 void
 412 screen_set_selection(struct screen *s, u_int sx, u_int sy,
 413     u_int ex, u_int ey, u_int rectangle, int modekeys, struct grid_cell *gc)
 414 {
 415         if (s->sel == NULL)
 416                 s->sel = xcalloc(1, sizeof *s->sel);
 417
 418         memcpy(&s->sel->cell, gc, sizeof s->sel->cell);
 419         s->sel->hidden = 0;
 420         s->sel->rectangle = rectangle;
 421         s->sel->modekeys = modekeys;
 422
 423         s->sel->sx = sx;
 424         s->sel->sy = sy;
 425         s->sel->ex = ex;
 426         s->sel->ey = ey;
 427 }
 428
 429 /* Clear selection. */
 430 void
 431 screen_clear_selection(struct screen *s)
 432 {
 433         free(s->sel);
 434         s->sel = NULL;
 435 }
 436
 437 /* Hide selection. */
 438 void
 439 screen_hide_selection(struct screen *s)
 440 {
 441         if (s->sel != NULL)
 442                 s->sel->hidden = 1;
 443 }
 444
 445 /* Check if cell in selection. */
 446 int
 447 screen_check_selection(struct screen *s, u_int px, u_int py)
 448 {
 449         struct screen_sel       *sel = s->sel;
 450         u_int                    xx;
 451
 452         if (sel == NULL || sel->hidden)
 453                 return (0);
 454
 455         if (sel->rectangle) {
 456                 if (sel->sy < sel->ey) {
 457                         /* start line < end line -- downward selection. */
 458                         if (py < sel->sy || py > sel->ey)
 459                                 return (0);
 460                 } else if (sel->sy > sel->ey) {
 461                         /* start line > end line -- upward selection. */
 462                         if (py > sel->sy || py < sel->ey)
 463                                 return (0);
 464                 } else {
 465                         /* starting line == ending line. */
 466                         if (py != sel->sy)
 467                                 return (0);
 468                 }
 469
 470                 /*
 471                  * Need to include the selection start row, but not the cursor
 472                  * row, which means the selection changes depending on which
 473                  * one is on the left.
 474                  */
 475                 if (sel->ex < sel->sx) {
 476                         /* Cursor (ex) is on the left. */
 477                         if (px < sel->ex)
 478                                 return (0);
 479
 480                         if (px > sel->sx)
 481                                 return (0);
 482                 } else {
 483                         /* Selection start (sx) is on the left. */
 484                         if (px < sel->sx)
 485                                 return (0);
 486
 487                         if (px > sel->ex)
 488                                 return (0);
 489                 }
 490         } else {
 491                 /*
 492                  * Like emacs, keep the top-left-most character, and drop the
 493                  * bottom-right-most, regardless of copy direction.
 494                  */
 495                 if (sel->sy < sel->ey) {
 496                         /* starting line < ending line -- downward selection. */
 497                         if (py < sel->sy || py > sel->ey)
 498                                 return (0);
 499
 500                         if (py == sel->sy && px < sel->sx)
 501                                 return (0);
 502
 503                         if (sel->modekeys == MODEKEY_EMACS)
 504                                 xx = (sel->ex == 0 ? 0 : sel->ex - 1);
 505                         else
 506                                 xx = sel->ex;
 507                         if (py == sel->ey && px > xx)
 508                                 return (0);
 509                 } else if (sel->sy > sel->ey) {
 510                         /* starting line > ending line -- upward selection. */
 511                         if (py > sel->sy || py < sel->ey)
 512                                 return (0);
 513
 514                         if (py == sel->ey && px < sel->ex)
 515                                 return (0);
 516
 517                         if (sel->modekeys == MODEKEY_EMACS)
 518                                 xx = sel->sx - 1;
 519                         else
 520                                 xx = sel->sx;
 521                         if (py == sel->sy && (sel->sx == 0 || px > xx))
 522                                 return (0);
 523                 } else {
 524                         /* starting line == ending line. */
 525                         if (py != sel->sy)
 526                                 return (0);
 527
 528                         if (sel->ex < sel->sx) {
 529                                 /* cursor (ex) is on the left */
 530                                 if (sel->modekeys == MODEKEY_EMACS)
 531                                         xx = sel->sx - 1;
 532                                 else
 533                                         xx = sel->sx;
 534                                 if (px > xx || px < sel->ex)
 535                                         return (0);
 536                         } else {
 537                                 /* selection start (sx) is on the left */
 538                                 if (sel->modekeys == MODEKEY_EMACS)
 539                                         xx = (sel->ex == 0 ? 0 : sel->ex - 1);
 540                                 else
 541                                         xx = sel->ex;
 542                                 if (px < sel->sx || px > xx)
 543                                         return (0);
 544                         }
 545                 }
 546         }
 547
 548         return (1);
 549 }
 550
 551 /* Get selected grid cell. */
 552 void
 553 screen_select_cell(struct screen *s, struct grid_cell *dst,
 554     const struct grid_cell *src)
 555 {
 556         if (s->sel == NULL || s->sel->hidden)
 557                 return;
 558
 559         memcpy(dst, &s->sel->cell, sizeof *dst);
 560
 561         utf8_copy(&dst->data, &src->data);
 562         dst->attr = dst->attr & ~GRID_ATTR_CHARSET;
 563         dst->attr |= src->attr & GRID_ATTR_CHARSET;
 564         dst->flags = src->flags;
 565 }
 566
 567 /* Reflow wrapped lines. */
 568 static void
 569 screen_reflow(struct screen *s, u_int new_x, u_int *cx, u_int *cy, int cursor)
 570 {
 571         u_int   wx, wy;
 572
 573         if (cursor) {
 574                 grid_wrap_position(s->grid, *cx, *cy, &wx, &wy);
 575                 log_debug("%s: cursor %u,%u is %u,%u", __func__, *cx, *cy, wx,
 576                     wy);
 577         }
 578
 579         grid_reflow(s->grid, new_x);
 580
 581         if (cursor) {
 582                 grid_unwrap_position(s->grid, cx, cy, wx, wy);
 583                 log_debug("%s: new cursor is %u,%u", __func__, *cx, *cy);
 584         }
 585         else {
 586                 *cx = 0;
 587                 *cy = s->grid->hsize;
 588         }
 589 }
 590
 591 /*
 592  * Enter alternative screen mode. A copy of the visible screen is saved and the
 593  * history is not updated.
 594  */
 595 void
 596 screen_alternate_on(struct screen *s, struct grid_cell *gc, int cursor)
 597 {
 598         u_int   sx, sy;
 599
 600         if (s->saved_grid != NULL)
 601                 return;
 602         sx = screen_size_x(s);
 603         sy = screen_size_y(s);
 604
 605         s->saved_grid = grid_create(sx, sy, 0);
 606         grid_duplicate_lines(s->saved_grid, 0, s->grid, screen_hsize(s), sy);
 607         if (cursor) {
 608                 s->saved_cx = s->cx;
 609                 s->saved_cy = s->cy;
 610         }
 611         memcpy(&s->saved_cell, gc, sizeof s->saved_cell);
 612
 613         grid_view_clear(s->grid, 0, 0, sx, sy, 8);
 614
 615         s->saved_flags = s->grid->flags;
 616         s->grid->flags &= ~GRID_HISTORY;
 617 }
 618
 619 /* Exit alternate screen mode and restore the copied grid. */
 620 void
 621 screen_alternate_off(struct screen *s, struct grid_cell *gc, int cursor)
 622 {
 623         u_int   sx = screen_size_x(s), sy = screen_size_y(s);
 624
 625         /*
 626          * If the current size is different, temporarily resize to the old size
 627          * before copying back.
 628          */
 629         if (s->saved_grid != NULL)
 630                 screen_resize(s, s->saved_grid->sx, s->saved_grid->sy, 0);
 631
 632         /*
 633          * Restore the cursor position and cell. This happens even if not
 634          * currently in the alternate screen.
 635          */
 636         if (cursor && s->saved_cx != UINT_MAX && s->saved_cy != UINT_MAX) {
 637                 s->cx = s->saved_cx;
 638                 s->cy = s->saved_cy;
 639                 if (gc != NULL)
 640                         memcpy(gc, &s->saved_cell, sizeof *gc);
 641         }
 642
 643         /* If not in the alternate screen, do nothing more. */
 644         if (s->saved_grid == NULL) {
 645                 if (s->cx > screen_size_x(s) - 1)
 646                         s->cx = screen_size_x(s) - 1;
 647                 if (s->cy > screen_size_y(s) - 1)
 648                         s->cy = screen_size_y(s) - 1;
 649                 return;
 650         }
 651
 652         /* Restore the saved grid. */
 653         grid_duplicate_lines(s->grid, screen_hsize(s), s->saved_grid, 0,
 654             s->saved_grid->sy);
 655
 656         /*
 657          * Turn history back on (so resize can use it) and then resize back to
 658          * the current size.
 659          */
 660         if (s->saved_flags & GRID_HISTORY)
 661                 s->grid->flags |= GRID_HISTORY;
 662         screen_resize(s, sx, sy, 1);
 663
 664         grid_destroy(s->saved_grid);
 665         s->saved_grid = NULL;
 666
 667         if (s->cx > screen_size_x(s) - 1)
 668                 s->cx = screen_size_x(s) - 1;
 669         if (s->cy > screen_size_y(s) - 1)
 670                 s->cy = screen_size_y(s) - 1;
 671 }
 672
 673 /* Get mode as a string. */
 674 const char *
 675 screen_mode_to_string(int mode)
 676 {
 677         static char     tmp[1024];
 678
 679         if (mode == 0)
 680                 return ("NONE");
 681         if (mode == ALL_MODES)
 682                 return ("ALL");
 683
 684         *tmp = '\0';
 685         if (mode & MODE_CURSOR)
 686                 strlcat(tmp, "CURSOR,", sizeof tmp);
 687         if (mode & MODE_INSERT)
 688                 strlcat(tmp, "INSERT,", sizeof tmp);
 689         if (mode & MODE_KCURSOR)
 690                 strlcat(tmp, "KCURSOR,", sizeof tmp);
 691         if (mode & MODE_KKEYPAD)
 692                 strlcat(tmp, "KKEYPAD,", sizeof tmp);
 693         if (mode & MODE_WRAP)
 694                 strlcat(tmp, "WRAP,", sizeof tmp);
 695         if (mode & MODE_MOUSE_STANDARD)
 696                 strlcat(tmp, "MOUSE_STANDARD,", sizeof tmp);
 697         if (mode & MODE_MOUSE_BUTTON)
 698                 strlcat(tmp, "MOUSE_BUTTON,", sizeof tmp);
 699         if (mode & MODE_CURSOR_BLINKING)
 700                 strlcat(tmp, "CURSOR_BLINKING,", sizeof tmp);
 701         if (mode & MODE_CURSOR_VERY_VISIBLE)
 702                 strlcat(tmp, "CURSOR_VERY_VISIBLE,", sizeof tmp);
 703         if (mode & MODE_MOUSE_UTF8)
 704                 strlcat(tmp, "MOUSE_UTF8,", sizeof tmp);
 705         if (mode & MODE_MOUSE_SGR)
 706                 strlcat(tmp, "MOUSE_SGR,", sizeof tmp);
 707         if (mode & MODE_BRACKETPASTE)
 708                 strlcat(tmp, "BRACKETPASTE,", sizeof tmp);
 709         if (mode & MODE_FOCUSON)
 710                 strlcat(tmp, "FOCUSON,", sizeof tmp);
 711         if (mode & MODE_MOUSE_ALL)
 712                 strlcat(tmp, "MOUSE_ALL,", sizeof tmp);
 713         if (mode & MODE_ORIGIN)
 714                 strlcat(tmp, "ORIGIN,", sizeof tmp);
 715         if (mode & MODE_CRLF)
 716                 strlcat(tmp, "CRLF,", sizeof tmp);
 717         if (mode & MODE_KEXTENDED)
 718                 strlcat(tmp, "KEXTENDED,", sizeof tmp);
 719         tmp[strlen(tmp) - 1] = '\0';
 720         return (tmp);
 721 }