1 /* $OpenBSD: layout-set.c,v 1.21 2018/10/18 08:38:01 nicm Exp $ */ 2 3 /* 4 * Copyright (c) 2009 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 <string.h> 22 23 #include "tmux.h" 24 25 /* 26 * Set window layouts - predefined methods to arrange windows. These are 27 * one-off and generate a layout tree. 28 */ 29 30 static void layout_set_even_h(struct window *); 31 static void layout_set_even_v(struct window *); 32 static void layout_set_main_h(struct window *); 33 static void layout_set_main_v(struct window *); 34 static void layout_set_tiled(struct window *); 35 36 static const struct { 37 const char *name; 38 void (*arrange)(struct window *); 39 } layout_sets[] = { 40 { "even-horizontal", layout_set_even_h }, 41 { "even-vertical", layout_set_even_v }, 42 { "main-horizontal", layout_set_main_h }, 43 { "main-vertical", layout_set_main_v }, 44 { "tiled", layout_set_tiled }, 45 }; 46 47 int 48 layout_set_lookup(const char *name) 49 { 50 u_int i; 51 int matched = -1; 52 53 for (i = 0; i < nitems(layout_sets); i++) { 54 if (strncmp(layout_sets[i].name, name, strlen(name)) == 0) { 55 if (matched != -1) /* ambiguous */ 56 return (-1); 57 matched = i; 58 } 59 } 60 61 return (matched); 62 } 63 64 u_int 65 layout_set_select(struct window *w, u_int layout) 66 { 67 if (layout > nitems(layout_sets) - 1) 68 layout = nitems(layout_sets) - 1; 69 70 if (layout_sets[layout].arrange != NULL) 71 layout_sets[layout].arrange(w); 72 73 w->lastlayout = layout; 74 return (layout); 75 } 76 77 u_int 78 layout_set_next(struct window *w) 79 { 80 u_int layout; 81 82 if (w->lastlayout == -1) 83 layout = 0; 84 else { 85 layout = w->lastlayout + 1; 86 if (layout > nitems(layout_sets) - 1) 87 layout = 0; 88 } 89 90 if (layout_sets[layout].arrange != NULL) 91 layout_sets[layout].arrange(w); 92 w->lastlayout = layout; 93 return (layout); 94 } 95 96 u_int 97 layout_set_previous(struct window *w) 98 { 99 u_int layout; 100 101 if (w->lastlayout == -1) 102 layout = nitems(layout_sets) - 1; 103 else { 104 layout = w->lastlayout; 105 if (layout == 0) 106 layout = nitems(layout_sets) - 1; 107 else 108 layout--; 109 } 110 111 if (layout_sets[layout].arrange != NULL) 112 layout_sets[layout].arrange(w); 113 w->lastlayout = layout; 114 return (layout); 115 } 116 117 static void 118 layout_set_even(struct window *w, enum layout_type type) 119 { 120 struct window_pane *wp; 121 struct layout_cell *lc, *lcnew; 122 u_int n; 123 124 layout_print_cell(w->layout_root, __func__, 1); 125 126 /* Get number of panes. */ 127 n = window_count_panes(w); 128 if (n <= 1) 129 return; 130 131 /* Free the old root and construct a new. */ 132 layout_free(w); 133 lc = w->layout_root = layout_create_cell(NULL); 134 layout_set_size(lc, w->sx, w->sy, 0, 0); 135 layout_make_node(lc, type); 136 137 /* Build new leaf cells. */ 138 TAILQ_FOREACH(wp, &w->panes, entry) { 139 lcnew = layout_create_cell(lc); 140 layout_make_leaf(lcnew, wp); 141 lcnew->sx = w->sx; 142 lcnew->sy = w->sy; 143 TAILQ_INSERT_TAIL(&lc->cells, lcnew, entry); 144 } 145 146 /* Spread out cells. */ 147 layout_spread_cell(w, lc); 148 149 /* Fix cell offsets. */ 150 layout_fix_offsets(lc); 151 layout_fix_panes(w); 152 153 layout_print_cell(w->layout_root, __func__, 1); 154 155 notify_window("window-layout-changed", w); 156 server_redraw_window(w); 157 } 158 159 static void 160 layout_set_even_h(struct window *w) 161 { 162 layout_set_even(w, LAYOUT_LEFTRIGHT); 163 } 164 165 static void 166 layout_set_even_v(struct window *w) 167 { 168 layout_set_even(w, LAYOUT_TOPBOTTOM); 169 } 170 171 static void 172 layout_set_main_h(struct window *w) 173 { 174 struct window_pane *wp; 175 struct layout_cell *lc, *lcmain, *lcrow, *lcchild; 176 u_int n, mainheight, otherheight, width, height; 177 u_int used, i, j, columns, rows, totalrows; 178 179 layout_print_cell(w->layout_root, __func__, 1); 180 181 /* Get number of panes. */ 182 n = window_count_panes(w); 183 if (n <= 1) 184 return; 185 n--; /* take off main pane */ 186 187 /* How many rows and columns will be needed, not counting main? */ 188 columns = (w->sx + 1) / (PANE_MINIMUM + 1); /* maximum columns */ 189 if (columns == 0) 190 columns = 1; 191 rows = 1 + (n - 1) / columns; 192 columns = 1 + (n - 1) / rows; 193 width = (w->sx - (n - 1)) / columns; 194 195 /* Get the main pane height and add one for separator line. */ 196 mainheight = options_get_number(w->options, "main-pane-height") + 1; 197 198 /* Get the optional other pane height and add one for separator line. */ 199 otherheight = options_get_number(w->options, "other-pane-height") + 1; 200 201 /* 202 * If an other pane height was specified, honour it so long as it 203 * doesn't shrink the main height to less than the main-pane-height 204 */ 205 if (otherheight > 1 && w->sy - otherheight > mainheight) 206 mainheight = w->sy - otherheight; 207 if (mainheight < PANE_MINIMUM + 1) 208 mainheight = PANE_MINIMUM + 1; 209 210 /* Try and make everything fit. */ 211 totalrows = rows * (PANE_MINIMUM + 1) - 1; 212 if (mainheight + totalrows > w->sy) { 213 if (totalrows + PANE_MINIMUM + 1 > w->sy) 214 mainheight = PANE_MINIMUM + 2; 215 else 216 mainheight = w->sy - totalrows; 217 height = PANE_MINIMUM; 218 } else 219 height = (w->sy - mainheight - (rows - 1)) / rows; 220 221 /* Free old tree and create a new root. */ 222 layout_free(w); 223 lc = w->layout_root = layout_create_cell(NULL); 224 layout_set_size(lc, w->sx, mainheight + rows * (height + 1) - 1, 0, 0); 225 layout_make_node(lc, LAYOUT_TOPBOTTOM); 226 227 /* Create the main pane. */ 228 lcmain = layout_create_cell(lc); 229 layout_set_size(lcmain, w->sx, mainheight - 1, 0, 0); 230 layout_make_leaf(lcmain, TAILQ_FIRST(&w->panes)); 231 TAILQ_INSERT_TAIL(&lc->cells, lcmain, entry); 232 233 /* Create a grid of the remaining cells. */ 234 wp = TAILQ_NEXT(TAILQ_FIRST(&w->panes), entry); 235 for (j = 0; j < rows; j++) { 236 /* If this is the last cell, all done. */ 237 if (wp == NULL) 238 break; 239 240 /* Create the new row. */ 241 lcrow = layout_create_cell(lc); 242 layout_set_size(lcrow, w->sx, height, 0, 0); 243 TAILQ_INSERT_TAIL(&lc->cells, lcrow, entry); 244 245 /* If only one column, just use the row directly. */ 246 if (columns == 1) { 247 layout_make_leaf(lcrow, wp); 248 wp = TAILQ_NEXT(wp, entry); 249 continue; 250 } 251 252 /* Add in the columns. */ 253 layout_make_node(lcrow, LAYOUT_LEFTRIGHT); 254 for (i = 0; i < columns; i++) { 255 /* Create and add a pane cell. */ 256 lcchild = layout_create_cell(lcrow); 257 layout_set_size(lcchild, width, height, 0, 0); 258 layout_make_leaf(lcchild, wp); 259 TAILQ_INSERT_TAIL(&lcrow->cells, lcchild, entry); 260 261 /* Move to the next cell. */ 262 if ((wp = TAILQ_NEXT(wp, entry)) == NULL) 263 break; 264 } 265 266 /* Adjust the row to fit the full width if necessary. */ 267 if (i == columns) 268 i--; 269 used = ((i + 1) * (width + 1)) - 1; 270 if (w->sx <= used) 271 continue; 272 lcchild = TAILQ_LAST(&lcrow->cells, layout_cells); 273 layout_resize_adjust(w, lcchild, LAYOUT_LEFTRIGHT, 274 w->sx - used); 275 } 276 277 /* Adjust the last row height to fit if necessary. */ 278 used = mainheight + (rows * height) + rows - 1; 279 if (w->sy > used) { 280 lcrow = TAILQ_LAST(&lc->cells, layout_cells); 281 layout_resize_adjust(w, lcrow, LAYOUT_TOPBOTTOM, 282 w->sy - used); 283 } 284 285 /* Fix cell offsets. */ 286 layout_fix_offsets(lc); 287 layout_fix_panes(w); 288 289 layout_print_cell(w->layout_root, __func__, 1); 290 291 notify_window("window-layout-changed", w); 292 server_redraw_window(w); 293 } 294 295 static void 296 layout_set_main_v(struct window *w) 297 { 298 struct window_pane *wp; 299 struct layout_cell *lc, *lcmain, *lccolumn, *lcchild; 300 u_int n, mainwidth, otherwidth, width, height; 301 u_int used, i, j, columns, rows, totalcolumns; 302 303 layout_print_cell(w->layout_root, __func__, 1); 304 305 /* Get number of panes. */ 306 n = window_count_panes(w); 307 if (n <= 1) 308 return; 309 n--; /* take off main pane */ 310 311 /* How many rows and columns will be needed, not counting main? */ 312 rows = (w->sy + 1) / (PANE_MINIMUM + 1); /* maximum rows */ 313 if (rows == 0) 314 rows = 1; 315 columns = 1 + (n - 1) / rows; 316 rows = 1 + (n - 1) / columns; 317 height = (w->sy - (n - 1)) / rows; 318 319 /* Get the main pane width and add one for separator line. */ 320 mainwidth = options_get_number(w->options, "main-pane-width") + 1; 321 322 /* Get the optional other pane width and add one for separator line. */ 323 otherwidth = options_get_number(w->options, "other-pane-width") + 1; 324 325 /* 326 * If an other pane width was specified, honour it so long as it 327 * doesn't shrink the main width to less than the main-pane-width 328 */ 329 if (otherwidth > 1 && w->sx - otherwidth > mainwidth) 330 mainwidth = w->sx - otherwidth; 331 if (mainwidth < PANE_MINIMUM + 1) 332 mainwidth = PANE_MINIMUM + 1; 333 334 /* Try and make everything fit. */ 335 totalcolumns = columns * (PANE_MINIMUM + 1) - 1; 336 if (mainwidth + totalcolumns > w->sx) { 337 if (totalcolumns + PANE_MINIMUM + 1 > w->sx) 338 mainwidth = PANE_MINIMUM + 2; 339 else 340 mainwidth = w->sx - totalcolumns; 341 width = PANE_MINIMUM; 342 } else 343 width = (w->sx - mainwidth - (columns - 1)) / columns; 344 345 /* Free old tree and create a new root. */ 346 layout_free(w); 347 lc = w->layout_root = layout_create_cell(NULL); 348 layout_set_size(lc, mainwidth + columns * (width + 1) - 1, w->sy, 0, 0); 349 layout_make_node(lc, LAYOUT_LEFTRIGHT); 350 351 /* Create the main pane. */ 352 lcmain = layout_create_cell(lc); 353 layout_set_size(lcmain, mainwidth - 1, w->sy, 0, 0); 354 layout_make_leaf(lcmain, TAILQ_FIRST(&w->panes)); 355 TAILQ_INSERT_TAIL(&lc->cells, lcmain, entry); 356 357 /* Create a grid of the remaining cells. */ 358 wp = TAILQ_NEXT(TAILQ_FIRST(&w->panes), entry); 359 for (j = 0; j < columns; j++) { 360 /* If this is the last cell, all done. */ 361 if (wp == NULL) 362 break; 363 364 /* Create the new column. */ 365 lccolumn = layout_create_cell(lc); 366 layout_set_size(lccolumn, width, w->sy, 0, 0); 367 TAILQ_INSERT_TAIL(&lc->cells, lccolumn, entry); 368 369 /* If only one row, just use the row directly. */ 370 if (rows == 1) { 371 layout_make_leaf(lccolumn, wp); 372 wp = TAILQ_NEXT(wp, entry); 373 continue; 374 } 375 376 /* Add in the rows. */ 377 layout_make_node(lccolumn, LAYOUT_TOPBOTTOM); 378 for (i = 0; i < rows; i++) { 379 /* Create and add a pane cell. */ 380 lcchild = layout_create_cell(lccolumn); 381 layout_set_size(lcchild, width, height, 0, 0); 382 layout_make_leaf(lcchild, wp); 383 TAILQ_INSERT_TAIL(&lccolumn->cells, lcchild, entry); 384 385 /* Move to the next cell. */ 386 if ((wp = TAILQ_NEXT(wp, entry)) == NULL) 387 break; 388 } 389 390 /* Adjust the column to fit the full height if necessary. */ 391 if (i == rows) 392 i--; 393 used = ((i + 1) * (height + 1)) - 1; 394 if (w->sy <= used) 395 continue; 396 lcchild = TAILQ_LAST(&lccolumn->cells, layout_cells); 397 layout_resize_adjust(w, lcchild, LAYOUT_TOPBOTTOM, 398 w->sy - used); 399 } 400 401 /* Adjust the last column width to fit if necessary. */ 402 used = mainwidth + (columns * width) + columns - 1; 403 if (w->sx > used) { 404 lccolumn = TAILQ_LAST(&lc->cells, layout_cells); 405 layout_resize_adjust(w, lccolumn, LAYOUT_LEFTRIGHT, 406 w->sx - used); 407 } 408 409 /* Fix cell offsets. */ 410 layout_fix_offsets(lc); 411 layout_fix_panes(w); 412 413 layout_print_cell(w->layout_root, __func__, 1); 414 415 notify_window("window-layout-changed", w); 416 server_redraw_window(w); 417 } 418 419 void 420 layout_set_tiled(struct window *w) 421 { 422 struct window_pane *wp; 423 struct layout_cell *lc, *lcrow, *lcchild; 424 u_int n, width, height, used; 425 u_int i, j, columns, rows; 426 427 layout_print_cell(w->layout_root, __func__, 1); 428 429 /* Get number of panes. */ 430 n = window_count_panes(w); 431 if (n <= 1) 432 return; 433 434 /* How many rows and columns are wanted? */ 435 rows = columns = 1; 436 while (rows * columns < n) { 437 rows++; 438 if (rows * columns < n) 439 columns++; 440 } 441 442 /* What width and height should they be? */ 443 width = (w->sx - (columns - 1)) / columns; 444 if (width < PANE_MINIMUM) 445 width = PANE_MINIMUM; 446 height = (w->sy - (rows - 1)) / rows; 447 if (height < PANE_MINIMUM) 448 height = PANE_MINIMUM; 449 450 /* Free old tree and create a new root. */ 451 layout_free(w); 452 lc = w->layout_root = layout_create_cell(NULL); 453 layout_set_size(lc, (width + 1) * columns - 1, 454 (height + 1) * rows - 1, 0, 0); 455 layout_make_node(lc, LAYOUT_TOPBOTTOM); 456 457 /* Create a grid of the cells. */ 458 wp = TAILQ_FIRST(&w->panes); 459 for (j = 0; j < rows; j++) { 460 /* If this is the last cell, all done. */ 461 if (wp == NULL) 462 break; 463 464 /* Create the new row. */ 465 lcrow = layout_create_cell(lc); 466 layout_set_size(lcrow, w->sx, height, 0, 0); 467 TAILQ_INSERT_TAIL(&lc->cells, lcrow, entry); 468 469 /* If only one column, just use the row directly. */ 470 if (n - (j * columns) == 1 || columns == 1) { 471 layout_make_leaf(lcrow, wp); 472 wp = TAILQ_NEXT(wp, entry); 473 continue; 474 } 475 476 /* Add in the columns. */ 477 layout_make_node(lcrow, LAYOUT_LEFTRIGHT); 478 for (i = 0; i < columns; i++) { 479 /* Create and add a pane cell. */ 480 lcchild = layout_create_cell(lcrow); 481 layout_set_size(lcchild, width, height, 0, 0); 482 layout_make_leaf(lcchild, wp); 483 TAILQ_INSERT_TAIL(&lcrow->cells, lcchild, entry); 484 485 /* Move to the next cell. */ 486 if ((wp = TAILQ_NEXT(wp, entry)) == NULL) 487 break; 488 } 489 490 /* 491 * Adjust the row and columns to fit the full width if 492 * necessary. 493 */ 494 if (i == columns) 495 i--; 496 used = ((i + 1) * (width + 1)) - 1; 497 if (w->sx <= used) 498 continue; 499 lcchild = TAILQ_LAST(&lcrow->cells, layout_cells); 500 layout_resize_adjust(w, lcchild, LAYOUT_LEFTRIGHT, 501 w->sx - used); 502 } 503 504 /* Adjust the last row height to fit if necessary. */ 505 used = (rows * height) + rows - 1; 506 if (w->sy > used) { 507 lcrow = TAILQ_LAST(&lc->cells, layout_cells); 508 layout_resize_adjust(w, lcrow, LAYOUT_TOPBOTTOM, 509 w->sy - used); 510 } 511 512 /* Fix cell offsets. */ 513 layout_fix_offsets(lc); 514 layout_fix_panes(w); 515 516 layout_print_cell(w->layout_root, __func__, 1); 517 518 notify_window("window-layout-changed", w); 519 server_redraw_window(w); 520 } 521