gdb/tui/tui-layout.c

   1 /* TUI layout window management.
   2
   3    Copyright (C) 1998-2019 Free Software Foundation, Inc.
   4
   5    Contributed by Hewlett-Packard Company.
   6
   7    This file is part of GDB.
   8
   9    This program is free software; you can redistribute it and/or modify
  10    it under the terms of the GNU General Public License as published by
  11    the Free Software Foundation; either version 3 of the License, or
  12    (at your option) any later version.
  13
  14    This program is distributed in the hope that it will be useful,
  15    but WITHOUT ANY WARRANTY; without even the implied warranty of
  16    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  17    GNU General Public License for more details.
  18
  19    You should have received a copy of the GNU General Public License
  20    along with this program.  If not, see <http://www.gnu.org/licenses/>.  */
  21
  22 #include "defs.h"
  23 #include "arch-utils.h"
  24 #include "command.h"
  25 #include "symtab.h"
  26 #include "frame.h"
  27 #include "source.h"
  28 #include <ctype.h>
  29
  30 #include "tui/tui.h"
  31 #include "tui/tui-data.h"
  32 #include "tui/tui-windata.h"
  33 #include "tui/tui-wingeneral.h"
  34 #include "tui/tui-stack.h"
  35 #include "tui/tui-regs.h"
  36 #include "tui/tui-win.h"
  37 #include "tui/tui-winsource.h"
  38 #include "tui/tui-disasm.h"
  39 #include "tui/tui-layout.h"
  40 #include "gdb_curses.h"
  41
  42 /*******************************
  43 ** Static Local Decls
  44 ********************************/
  45 static void show_layout (enum tui_layout_type);
  46 static void show_source_or_disasm_and_command (enum tui_layout_type);
  47 static struct tui_win_info *make_command_window (int, int);
  48 static struct tui_win_info *make_source_window (int, int);
  49 static struct tui_win_info *make_disasm_window (int, int);
  50 static void show_source_command (void);
  51 static void show_disasm_command (void);
  52 static void show_source_disasm_command (void);
  53 static void show_data (enum tui_layout_type);
  54 static enum tui_layout_type next_layout (void);
  55 static enum tui_layout_type prev_layout (void);
  56 static void tui_layout_command (const char *, int);
  57 static void extract_display_start_addr (struct gdbarch **, CORE_ADDR *);
  58
  59
  60 /***************************************
  61 ** DEFINITIONS
  62 ***************************************/
  63
  64 #define LAYOUT_USAGE     "Usage: layout prev | next | <layout_name> \n"
  65
  66 /* Show the screen layout defined.  */
  67 static void
  68 show_layout (enum tui_layout_type layout)
  69 {
  70   enum tui_layout_type cur_layout = tui_current_layout ();
  71
  72   if (layout != cur_layout)
  73     {
  74       /* Since the new layout may cause changes in window size, we
  75          should free the content and reallocate on next display of
  76          source/asm.  */
  77       tui_clear_source_windows ();
  78       if (layout == SRC_DATA_COMMAND
  79           || layout == DISASSEM_DATA_COMMAND)
  80         {
  81           show_data (layout);
  82           tui_refresh_all ();
  83         }
  84       else
  85         {
  86           /* First make the current layout be invisible.  */
  87           tui_make_all_invisible ();
  88           tui_make_invisible (tui_locator_win_info_ptr ());
  89
  90           switch (layout)
  91             {
  92               /* Now show the new layout.  */
  93             case SRC_COMMAND:
  94               show_source_command ();
  95               tui_add_to_source_windows (TUI_SRC_WIN);
  96               break;
  97             case DISASSEM_COMMAND:
  98               show_disasm_command ();
  99               tui_add_to_source_windows (TUI_DISASM_WIN);
 100               break;
 101             case SRC_DISASSEM_COMMAND:
 102               show_source_disasm_command ();
 103               tui_add_to_source_windows (TUI_SRC_WIN);
 104               tui_add_to_source_windows (TUI_DISASM_WIN);
 105               break;
 106             default:
 107               break;
 108             }
 109         }
 110     }
 111 }
 112
 113
 114 /* Function to set the layout to SRC_COMMAND, DISASSEM_COMMAND,
 115    SRC_DISASSEM_COMMAND, SRC_DATA_COMMAND, or DISASSEM_DATA_COMMAND.  */
 116 enum tui_status
 117 tui_set_layout (enum tui_layout_type layout_type)
 118 {
 119   enum tui_status status = TUI_SUCCESS;
 120
 121   if (layout_type != UNDEFINED_LAYOUT)
 122     {
 123       enum tui_layout_type cur_layout = tui_current_layout ();
 124       struct gdbarch *gdbarch;
 125       CORE_ADDR addr;
 126       struct tui_win_info *win_with_focus = tui_win_with_focus ();
 127       struct tui_layout_def *layout_def = tui_layout_def ();
 128
 129       extract_display_start_addr (&gdbarch, &addr);
 130
 131       enum tui_layout_type new_layout = layout_type;
 132
 133       if (new_layout != cur_layout)
 134         {
 135           show_layout (new_layout);
 136
 137           /* Now determine where focus should be.  */
 138           if (win_with_focus != TUI_CMD_WIN)
 139             {
 140               switch (new_layout)
 141                 {
 142                 case SRC_COMMAND:
 143                   tui_set_win_focus_to (TUI_SRC_WIN);
 144                   layout_def->display_mode = SRC_WIN;
 145                   break;
 146                 case DISASSEM_COMMAND:
 147                   /* The previous layout was not showing code.
 148                      This can happen if there is no source
 149                      available:
 150
 151                      1. if the source file is in another dir OR
 152                      2. if target was compiled without -g
 153                      We still want to show the assembly though!  */
 154
 155                   tui_get_begin_asm_address (&gdbarch, &addr);
 156                   tui_set_win_focus_to (TUI_DISASM_WIN);
 157                   layout_def->display_mode = DISASSEM_WIN;
 158                   break;
 159                 case SRC_DISASSEM_COMMAND:
 160                   /* The previous layout was not showing code.
 161                      This can happen if there is no source
 162                      available:
 163
 164                      1. if the source file is in another dir OR
 165                      2. if target was compiled without -g
 166                      We still want to show the assembly though!  */
 167
 168                   tui_get_begin_asm_address (&gdbarch, &addr);
 169                   if (win_with_focus == TUI_SRC_WIN)
 170                     tui_set_win_focus_to (TUI_SRC_WIN);
 171                   else
 172                     tui_set_win_focus_to (TUI_DISASM_WIN);
 173                   break;
 174                 case SRC_DATA_COMMAND:
 175                   if (win_with_focus != TUI_DATA_WIN)
 176                     tui_set_win_focus_to (TUI_SRC_WIN);
 177                   else
 178                     tui_set_win_focus_to (TUI_DATA_WIN);
 179                   layout_def->display_mode = SRC_WIN;
 180                   break;
 181                 case DISASSEM_DATA_COMMAND:
 182                   /* The previous layout was not showing code.
 183                      This can happen if there is no source
 184                      available:
 185
 186                      1. if the source file is in another dir OR
 187                      2. if target was compiled without -g
 188                      We still want to show the assembly though!  */
 189
 190                   tui_get_begin_asm_address (&gdbarch, &addr);
 191                   if (win_with_focus != TUI_DATA_WIN)
 192                     tui_set_win_focus_to (TUI_DISASM_WIN);
 193                   else
 194                     tui_set_win_focus_to (TUI_DATA_WIN);
 195                   layout_def->display_mode = DISASSEM_WIN;
 196                   break;
 197                 default:
 198                   break;
 199                 }
 200             }
 201           /*
 202            * Now update the window content.
 203            */
 204           tui_update_source_windows_with_addr (gdbarch, addr);
 205           if (new_layout == SRC_DATA_COMMAND
 206               || new_layout == DISASSEM_DATA_COMMAND)
 207             tui_show_registers (TUI_DATA_WIN->current_group);
 208         }
 209     }
 210   else
 211     status = TUI_FAILURE;
 212
 213   return status;
 214 }
 215
 216 /* Add the specified window to the layout in a logical way.  This
 217    means setting up the most logical layout given the window to be
 218    added.  */
 219 void
 220 tui_add_win_to_layout (enum tui_win_type type)
 221 {
 222   enum tui_layout_type cur_layout = tui_current_layout ();
 223
 224   switch (type)
 225     {
 226     case SRC_WIN:
 227       if (cur_layout != SRC_COMMAND
 228           && cur_layout != SRC_DISASSEM_COMMAND
 229           && cur_layout != SRC_DATA_COMMAND)
 230         {
 231           tui_clear_source_windows_detail ();
 232           if (cur_layout == DISASSEM_DATA_COMMAND)
 233             show_layout (SRC_DATA_COMMAND);
 234           else
 235             show_layout (SRC_COMMAND);
 236         }
 237       break;
 238     case DISASSEM_WIN:
 239       if (cur_layout != DISASSEM_COMMAND
 240           && cur_layout != SRC_DISASSEM_COMMAND
 241           && cur_layout != DISASSEM_DATA_COMMAND)
 242         {
 243           tui_clear_source_windows_detail ();
 244           if (cur_layout == SRC_DATA_COMMAND)
 245             show_layout (DISASSEM_DATA_COMMAND);
 246           else
 247             show_layout (DISASSEM_COMMAND);
 248         }
 249       break;
 250     case DATA_WIN:
 251       if (cur_layout != SRC_DATA_COMMAND
 252           && cur_layout != DISASSEM_DATA_COMMAND)
 253         {
 254           if (cur_layout == DISASSEM_COMMAND)
 255             show_layout (DISASSEM_DATA_COMMAND);
 256           else
 257             show_layout (SRC_DATA_COMMAND);
 258         }
 259       break;
 260     default:
 261       break;
 262     }
 263 }
 264
 265
 266 /* Answer the height of a window.  If it hasn't been created yet,
 267    answer what the height of a window would be based upon its type and
 268    the layout.  */
 269 int
 270 tui_default_win_height (enum tui_win_type type,
 271                         enum tui_layout_type layout)
 272 {
 273   int h;
 274
 275   if (tui_win_list[type] != NULL)
 276     h = tui_win_list[type]->height;
 277   else
 278     {
 279       switch (layout)
 280         {
 281         case SRC_COMMAND:
 282         case DISASSEM_COMMAND:
 283           if (TUI_CMD_WIN == NULL)
 284             h = tui_term_height () / 2;
 285           else
 286             h = tui_term_height () - TUI_CMD_WIN->height;
 287           break;
 288         case SRC_DISASSEM_COMMAND:
 289         case SRC_DATA_COMMAND:
 290         case DISASSEM_DATA_COMMAND:
 291           if (TUI_CMD_WIN == NULL)
 292             h = tui_term_height () / 3;
 293           else
 294             h = (tui_term_height () - TUI_CMD_WIN->height) / 2;
 295           break;
 296         default:
 297           h = 0;
 298           break;
 299         }
 300     }
 301
 302   return h;
 303 }
 304
 305
 306 /* Answer the height of a window.  If it hasn't been created yet,
 307    answer what the height of a window would be based upon its type and
 308    the layout.  */
 309 int
 310 tui_default_win_viewport_height (enum tui_win_type type,
 311                                  enum tui_layout_type layout)
 312 {
 313   int h;
 314
 315   h = tui_default_win_height (type, layout);
 316
 317   if (tui_win_list[type] == TUI_CMD_WIN)
 318     h -= 1;
 319   else
 320     h -= 2;
 321
 322   return h;
 323 }
 324
 325 /* Complete possible layout names.  TEXT is the complete text entered so
 326    far, WORD is the word currently being completed.  */
 327
 328 static void
 329 layout_completer (struct cmd_list_element *ignore,
 330                   completion_tracker &tracker,
 331                   const char *text, const char *word)
 332 {
 333   static const char *layout_names [] =
 334     { "src", "asm", "split", "regs", "next", "prev", NULL };
 335
 336   complete_on_enum (tracker, layout_names, text, word);
 337 }
 338
 339 /* Function to initialize gdb commands, for tui window layout
 340    manipulation.  */
 341
 342 void
 343 _initialize_tui_layout (void)
 344 {
 345   struct cmd_list_element *cmd;
 346
 347   cmd = add_com ("layout", class_tui, tui_layout_command, _("\
 348 Change the layout of windows.\n\
 349 Usage: layout prev | next | LAYOUT-NAME\n\
 350 Layout names are:\n\
 351    src   : Displays source and command windows.\n\
 352    asm   : Displays disassembly and command windows.\n\
 353    split : Displays source, disassembly and command windows.\n\
 354    regs  : Displays register window. If existing layout\n\
 355            is source/command or assembly/command, the \n\
 356            register window is displayed. If the\n\
 357            source/assembly/command (split) is displayed, \n\
 358            the register window is displayed with \n\
 359            the window that has current logical focus."));
 360   set_cmd_completer (cmd, layout_completer);
 361 }
 362
 363
 364 /*************************
 365 ** STATIC LOCAL FUNCTIONS
 366 **************************/
 367
 368
 369 /* Function to set the layout to SRC, ASM, SPLIT, NEXT, PREV, DATA, or
 370    REGS. */
 371 enum tui_status
 372 tui_set_layout_by_name (const char *layout_name)
 373 {
 374   enum tui_status status = TUI_SUCCESS;
 375
 376   if (layout_name != NULL)
 377     {
 378       int i;
 379       enum tui_layout_type new_layout = UNDEFINED_LAYOUT;
 380       enum tui_layout_type cur_layout = tui_current_layout ();
 381
 382       std::string copy = layout_name;
 383       for (i = 0; i < copy.size (); i++)
 384         copy[i] = toupper (copy[i]);
 385       const char *buf_ptr = copy.c_str ();
 386
 387       /* First check for ambiguous input.  */
 388       if (strlen (buf_ptr) <= 1 && *buf_ptr == 'S')
 389         {
 390           warning (_("Ambiguous command input."));
 391           status = TUI_FAILURE;
 392         }
 393       else
 394         {
 395           if (subset_compare (buf_ptr, "SRC"))
 396             new_layout = SRC_COMMAND;
 397           else if (subset_compare (buf_ptr, "ASM"))
 398             new_layout = DISASSEM_COMMAND;
 399           else if (subset_compare (buf_ptr, "SPLIT"))
 400             new_layout = SRC_DISASSEM_COMMAND;
 401           else if (subset_compare (buf_ptr, "REGS"))
 402             {
 403               if (cur_layout == SRC_COMMAND
 404                   || cur_layout == SRC_DATA_COMMAND)
 405                 new_layout = SRC_DATA_COMMAND;
 406               else
 407                 new_layout = DISASSEM_DATA_COMMAND;
 408             }
 409           else if (subset_compare (buf_ptr, "NEXT"))
 410             new_layout = next_layout ();
 411           else if (subset_compare (buf_ptr, "PREV"))
 412             new_layout = prev_layout ();
 413           else
 414             status = TUI_FAILURE;
 415
 416           if (status == TUI_SUCCESS)
 417             {
 418               /* Make sure the curses mode is enabled.  */
 419               tui_enable ();
 420               tui_set_layout (new_layout);
 421             }
 422         }
 423     }
 424   else
 425     status = TUI_FAILURE;
 426
 427   return status;
 428 }
 429
 430
 431 static void
 432 extract_display_start_addr (struct gdbarch **gdbarch_p, CORE_ADDR *addr_p)
 433 {
 434   enum tui_layout_type cur_layout = tui_current_layout ();
 435   struct gdbarch *gdbarch = get_current_arch ();
 436   CORE_ADDR addr;
 437   CORE_ADDR pc;
 438   struct symtab_and_line cursal = get_current_source_symtab_and_line ();
 439
 440   switch (cur_layout)
 441     {
 442     case SRC_COMMAND:
 443     case SRC_DATA_COMMAND:
 444       gdbarch = TUI_SRC_WIN->gdbarch;
 445       find_line_pc (cursal.symtab,
 446                     TUI_SRC_WIN->start_line_or_addr.u.line_no,
 447                     &pc);
 448       addr = pc;
 449       break;
 450     case DISASSEM_COMMAND:
 451     case SRC_DISASSEM_COMMAND:
 452     case DISASSEM_DATA_COMMAND:
 453       gdbarch = TUI_DISASM_WIN->gdbarch;
 454       addr = TUI_DISASM_WIN->start_line_or_addr.u.addr;
 455       break;
 456     default:
 457       addr = 0;
 458       break;
 459     }
 460
 461   *gdbarch_p = gdbarch;
 462   *addr_p = addr;
 463 }
 464
 465
 466 static void
 467 tui_layout_command (const char *arg, int from_tty)
 468 {
 469   /* Switch to the selected layout.  */
 470   if (tui_set_layout_by_name (arg) != TUI_SUCCESS)
 471     warning (_("Invalid layout specified.\n%s"), LAYOUT_USAGE);
 472 }
 473
 474 /* Answer the previous layout to cycle to.  */
 475 static enum tui_layout_type
 476 next_layout (void)
 477 {
 478   int new_layout;
 479
 480   new_layout = tui_current_layout ();
 481   if (new_layout == UNDEFINED_LAYOUT)
 482     new_layout = SRC_COMMAND;
 483   else
 484     {
 485       new_layout++;
 486       if (new_layout == UNDEFINED_LAYOUT)
 487         new_layout = SRC_COMMAND;
 488     }
 489
 490   return (enum tui_layout_type) new_layout;
 491 }
 492
 493
 494 /* Answer the next layout to cycle to.  */
 495 static enum tui_layout_type
 496 prev_layout (void)
 497 {
 498   int new_layout;
 499
 500   new_layout = tui_current_layout ();
 501   if (new_layout == SRC_COMMAND)
 502     new_layout = DISASSEM_DATA_COMMAND;
 503   else
 504     {
 505       new_layout--;
 506       if (new_layout == UNDEFINED_LAYOUT)
 507         new_layout = DISASSEM_DATA_COMMAND;
 508     }
 509
 510   return (enum tui_layout_type) new_layout;
 511 }
 512
 513
 514
 515 static struct tui_win_info *
 516 make_command_window (int height, int origin_y)
 517 {
 518   struct tui_win_info *result = new tui_cmd_window ();
 519   result->reset (height, tui_term_width (), 0, origin_y);
 520   tui_make_window (result, DONT_BOX_WINDOW);
 521   return result;
 522 }
 523
 524
 525 /* make_source_window().
 526  */
 527 static struct tui_win_info *
 528 make_source_window (int height, int origin_y)
 529 {
 530   tui_win_info *result = new tui_source_window ();
 531   result->reset (height, tui_term_width (), 0, origin_y);
 532   result->make_visible (true);
 533   return result;
 534 }
 535
 536
 537 /* make_disasm_window().
 538  */
 539 static struct tui_win_info *
 540 make_disasm_window (int height, int origin_y)
 541 {
 542   tui_win_info *result = new tui_disasm_window ();
 543   result->reset (height, tui_term_width (), 0, origin_y);
 544   result->make_visible (true);
 545   return result;
 546 }
 547
 548
 549 static tui_win_info *
 550 make_data_window (int height, int origin_y)
 551 {
 552   tui_win_info *result = new tui_data_window ();
 553   result->reset (height, tui_term_width (), 0, origin_y);
 554   result->make_visible (true);
 555   return result;
 556 }
 557
 558
 559
 560 /* Show the Source/Command layout.  */
 561 static void
 562 show_source_command (void)
 563 {
 564   show_source_or_disasm_and_command (SRC_COMMAND);
 565 }
 566
 567
 568 /* Show the Dissassem/Command layout.  */
 569 static void
 570 show_disasm_command (void)
 571 {
 572   show_source_or_disasm_and_command (DISASSEM_COMMAND);
 573 }
 574
 575
 576 /* Show the Source/Disassem/Command layout.  */
 577 static void
 578 show_source_disasm_command (void)
 579 {
 580   if (tui_current_layout () != SRC_DISASSEM_COMMAND)
 581     {
 582       int cmd_height, src_height, asm_height;
 583
 584       if (TUI_CMD_WIN != NULL)
 585         cmd_height = TUI_CMD_WIN->height;
 586       else
 587         cmd_height = tui_term_height () / 3;
 588
 589       src_height = (tui_term_height () - cmd_height) / 2;
 590       asm_height = tui_term_height () - (src_height + cmd_height);
 591
 592       if (TUI_SRC_WIN == NULL)
 593         tui_win_list[SRC_WIN] = make_source_window (src_height, 0);
 594       else
 595         {
 596           TUI_SRC_WIN->reset (src_height,
 597                               tui_term_width (),
 598                               0,
 599                               0);
 600           tui_make_visible (TUI_SRC_WIN);
 601           TUI_SRC_WIN->m_has_locator = false;
 602         }
 603
 604       struct tui_locator_window *locator = tui_locator_win_info_ptr ();
 605       gdb_assert (locator != nullptr);
 606
 607       tui_show_source_content (TUI_SRC_WIN);
 608       if (TUI_DISASM_WIN == NULL)
 609         {
 610           tui_win_list[DISASSEM_WIN]
 611             = make_disasm_window (asm_height, src_height - 1);
 612           locator->reset (2 /* 1 */ ,
 613                           tui_term_width (),
 614                           0,
 615                           (src_height + asm_height) - 1);
 616         }
 617       else
 618         {
 619           locator->reset (2 /* 1 */ ,
 620                           tui_term_width (),
 621                           0,
 622                           (src_height + asm_height) - 1);
 623           TUI_DISASM_WIN->m_has_locator = true;
 624           TUI_DISASM_WIN->reset (asm_height,
 625                                  tui_term_width (),
 626                                  0,
 627                                  src_height - 1);
 628           tui_make_visible (TUI_DISASM_WIN);
 629         }
 630       TUI_SRC_WIN->m_has_locator = false;
 631       TUI_DISASM_WIN->m_has_locator = true;
 632       tui_make_visible (locator);
 633       tui_show_locator_content ();
 634       tui_show_source_content (TUI_DISASM_WIN);
 635
 636       if (TUI_CMD_WIN == NULL)
 637         tui_win_list[CMD_WIN]
 638           = make_command_window (cmd_height, tui_term_height () - cmd_height);
 639       else
 640         {
 641           TUI_CMD_WIN->reset (TUI_CMD_WIN->height,
 642                               TUI_CMD_WIN->width,
 643                               0,
 644                               TUI_CMD_WIN->origin.y);
 645           tui_make_visible (TUI_CMD_WIN);
 646         }
 647       tui_set_current_layout_to (SRC_DISASSEM_COMMAND);
 648     }
 649 }
 650
 651
 652 /* Show the Source/Data/Command or the Dissassembly/Data/Command
 653    layout.  */
 654 static void
 655 show_data (enum tui_layout_type new_layout)
 656 {
 657   int total_height = (tui_term_height () - TUI_CMD_WIN->height);
 658   int src_height, data_height;
 659   enum tui_win_type win_type;
 660
 661   struct tui_locator_window *locator = tui_locator_win_info_ptr ();
 662   gdb_assert (locator != nullptr);
 663
 664   data_height = total_height / 2;
 665   src_height = total_height - data_height;
 666   tui_make_all_invisible ();
 667   tui_make_invisible (locator);
 668   if (tui_win_list[DATA_WIN] == nullptr)
 669     tui_win_list[DATA_WIN] = make_data_window (data_height, 0);
 670   else
 671     tui_win_list[DATA_WIN]->reset (data_height, tui_term_width (), 0, 0);
 672   tui_win_list[DATA_WIN]->make_visible (true);
 673
 674   if (new_layout == SRC_DATA_COMMAND)
 675     win_type = SRC_WIN;
 676   else
 677     win_type = DISASSEM_WIN;
 678
 679   tui_source_window_base *base;
 680   if (tui_win_list[win_type] == NULL)
 681     {
 682       if (win_type == SRC_WIN)
 683         tui_win_list[win_type]
 684           = make_source_window (src_height, data_height - 1);
 685       else
 686         tui_win_list[win_type]
 687           = make_disasm_window (src_height, data_height - 1);
 688       locator->reset (2 /* 1 */ ,
 689                       tui_term_width (),
 690                       0,
 691                       total_height - 1);
 692       base = (tui_source_window_base *) tui_win_list[win_type];
 693     }
 694   else
 695     {
 696       base = (tui_source_window_base *) tui_win_list[win_type];
 697       tui_win_list[win_type]->reset (src_height,
 698                                      tui_term_width (),
 699                                      0,
 700                                      data_height - 1);
 701       tui_make_visible (tui_win_list[win_type]);
 702       locator->reset (2 /* 1 */ ,
 703                       tui_term_width (),
 704                       0,
 705                       total_height - 1);
 706     }
 707   base->m_has_locator = true;
 708   tui_make_visible (locator);
 709   tui_show_locator_content ();
 710   tui_add_to_source_windows
 711     ((tui_source_window_base *) tui_win_list[win_type]);
 712   tui_set_current_layout_to (new_layout);
 713 }
 714
 715 void
 716 tui_gen_win_info::reset (int height_, int width_,
 717                          int origin_x_, int origin_y_)
 718 {
 719   int h = height_;
 720
 721   width = width_;
 722   height = h;
 723   if (h > 1)
 724     {
 725       viewport_height = h - 1;
 726       if (type != CMD_WIN)
 727         viewport_height--;
 728     }
 729   else
 730     viewport_height = 1;
 731   origin.x = origin_x_;
 732   origin.y = origin_y_;
 733 }
 734
 735 /* Show the Source/Command or the Disassem layout.  */
 736 static void
 737 show_source_or_disasm_and_command (enum tui_layout_type layout_type)
 738 {
 739   if (tui_current_layout () != layout_type)
 740     {
 741       struct tui_win_info **win_info_ptr;
 742       int src_height, cmd_height;
 743       struct tui_locator_window *locator = tui_locator_win_info_ptr ();
 744       gdb_assert (locator != nullptr);
 745
 746       if (TUI_CMD_WIN != NULL)
 747         cmd_height = TUI_CMD_WIN->height;
 748       else
 749         cmd_height = tui_term_height () / 3;
 750       src_height = tui_term_height () - cmd_height;
 751
 752       if (layout_type == SRC_COMMAND)
 753         win_info_ptr = &tui_win_list[SRC_WIN];
 754       else
 755         win_info_ptr = &tui_win_list[DISASSEM_WIN];
 756
 757       tui_source_window_base *base;
 758       if ((*win_info_ptr) == NULL)
 759         {
 760           if (layout_type == SRC_COMMAND)
 761             *win_info_ptr = make_source_window (src_height - 1, 0);
 762           else
 763             *win_info_ptr = make_disasm_window (src_height - 1, 0);
 764           locator->reset (2 /* 1 */ ,
 765                           tui_term_width (),
 766                           0,
 767                           src_height - 1);
 768           base = (tui_source_window_base *) *win_info_ptr;
 769         }
 770       else
 771         {
 772           base = (tui_source_window_base *) *win_info_ptr;
 773           locator->reset (2 /* 1 */ ,
 774                           tui_term_width (),
 775                           0,
 776                           src_height - 1);
 777           base->m_has_locator = true;
 778           (*win_info_ptr)->reset (src_height - 1,
 779                                   tui_term_width (),
 780                                   0,
 781                                   0);
 782           tui_make_visible (*win_info_ptr);
 783         }
 784
 785       base->m_has_locator = true;
 786       tui_make_visible (locator);
 787       tui_show_locator_content ();
 788       tui_show_source_content (base);
 789
 790       if (TUI_CMD_WIN == NULL)
 791         {
 792           tui_win_list[CMD_WIN] = make_command_window (cmd_height,
 793                                                        src_height);
 794         }
 795       else
 796         {
 797           TUI_CMD_WIN->reset (TUI_CMD_WIN->height,
 798                               TUI_CMD_WIN->width,
 799                               TUI_CMD_WIN->origin.x,
 800                               TUI_CMD_WIN->origin.y);
 801           tui_make_visible (TUI_CMD_WIN);
 802         }
 803       tui_set_current_layout_to (layout_type);
 804     }
 805 }