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 tui_gen_win_info *init_and_make_win (tui_gen_win_info *,
  47                                             enum tui_win_type,
  48                                             int, int, int, int,
  49                                             enum tui_box);
  50 static void show_source_or_disasm_and_command (enum tui_layout_type);
  51 static struct tui_win_info *make_source_or_disasm_window (enum tui_win_type,
  52                                                           int, int);
  53 static struct tui_win_info *make_command_window (int, int);
  54 static struct tui_win_info *make_source_window (int, int);
  55 static struct tui_win_info *make_disasm_window (int, int);
  56 static void make_data_window (struct tui_win_info **, int, int);
  57 static void show_source_command (void);
  58 static void show_disasm_command (void);
  59 static void show_source_disasm_command (void);
  60 static void show_data (enum tui_layout_type);
  61 static enum tui_layout_type next_layout (void);
  62 static enum tui_layout_type prev_layout (void);
  63 static void tui_layout_command (const char *, int);
  64 static void extract_display_start_addr (struct gdbarch **, CORE_ADDR *);
  65
  66
  67 /***************************************
  68 ** DEFINITIONS
  69 ***************************************/
  70
  71 #define LAYOUT_USAGE     "Usage: layout prev | next | <layout_name> \n"
  72
  73 /* Show the screen layout defined.  */
  74 static void
  75 show_layout (enum tui_layout_type layout)
  76 {
  77   enum tui_layout_type cur_layout = tui_current_layout ();
  78
  79   if (layout != cur_layout)
  80     {
  81       /* Since the new layout may cause changes in window size, we
  82          should free the content and reallocate on next display of
  83          source/asm.  */
  84       tui_clear_source_windows ();
  85       if (layout == SRC_DATA_COMMAND
  86           || layout == DISASSEM_DATA_COMMAND)
  87         {
  88           show_data (layout);
  89           tui_refresh_all ();
  90         }
  91       else
  92         {
  93           /* First make the current layout be invisible.  */
  94           tui_make_all_invisible ();
  95           tui_make_invisible (tui_locator_win_info_ptr ());
  96
  97           switch (layout)
  98             {
  99               /* Now show the new layout.  */
 100             case SRC_COMMAND:
 101               show_source_command ();
 102               tui_add_to_source_windows (TUI_SRC_WIN);
 103               break;
 104             case DISASSEM_COMMAND:
 105               show_disasm_command ();
 106               tui_add_to_source_windows (TUI_DISASM_WIN);
 107               break;
 108             case SRC_DISASSEM_COMMAND:
 109               show_source_disasm_command ();
 110               tui_add_to_source_windows (TUI_SRC_WIN);
 111               tui_add_to_source_windows (TUI_DISASM_WIN);
 112               break;
 113             default:
 114               break;
 115             }
 116         }
 117     }
 118 }
 119
 120
 121 /* Function to set the layout to SRC_COMMAND, DISASSEM_COMMAND,
 122    SRC_DISASSEM_COMMAND, SRC_DATA_COMMAND, or DISASSEM_DATA_COMMAND.  */
 123 enum tui_status
 124 tui_set_layout (enum tui_layout_type layout_type)
 125 {
 126   enum tui_status status = TUI_SUCCESS;
 127
 128   if (layout_type != UNDEFINED_LAYOUT)
 129     {
 130       enum tui_layout_type cur_layout = tui_current_layout (),
 131         new_layout = UNDEFINED_LAYOUT;
 132       int regs_populate = FALSE;
 133       struct gdbarch *gdbarch;
 134       CORE_ADDR addr;
 135       struct tui_win_info *win_with_focus = tui_win_with_focus ();
 136       struct tui_layout_def *layout_def = tui_layout_def ();
 137
 138       extract_display_start_addr (&gdbarch, &addr);
 139
 140       new_layout = layout_type;
 141
 142       regs_populate = (new_layout == SRC_DATA_COMMAND
 143                        || new_layout == DISASSEM_DATA_COMMAND);
 144       if (new_layout != cur_layout)
 145         {
 146           show_layout (new_layout);
 147
 148           /* Now determine where focus should be.  */
 149           if (win_with_focus != TUI_CMD_WIN)
 150             {
 151               switch (new_layout)
 152                 {
 153                 case SRC_COMMAND:
 154                   tui_set_win_focus_to (TUI_SRC_WIN);
 155                   layout_def->display_mode = SRC_WIN;
 156                   break;
 157                 case DISASSEM_COMMAND:
 158                   /* The previous layout was not showing code.
 159                      This can happen if there is no source
 160                      available:
 161
 162                      1. if the source file is in another dir OR
 163                      2. if target was compiled without -g
 164                      We still want to show the assembly though!  */
 165
 166                   tui_get_begin_asm_address (&gdbarch, &addr);
 167                   tui_set_win_focus_to (TUI_DISASM_WIN);
 168                   layout_def->display_mode = DISASSEM_WIN;
 169                   break;
 170                 case SRC_DISASSEM_COMMAND:
 171                   /* The previous layout was not showing code.
 172                      This can happen if there is no source
 173                      available:
 174
 175                      1. if the source file is in another dir OR
 176                      2. if target was compiled without -g
 177                      We still want to show the assembly though!  */
 178
 179                   tui_get_begin_asm_address (&gdbarch, &addr);
 180                   if (win_with_focus == TUI_SRC_WIN)
 181                     tui_set_win_focus_to (TUI_SRC_WIN);
 182                   else
 183                     tui_set_win_focus_to (TUI_DISASM_WIN);
 184                   break;
 185                 case SRC_DATA_COMMAND:
 186                   if (win_with_focus != TUI_DATA_WIN)
 187                     tui_set_win_focus_to (TUI_SRC_WIN);
 188                   else
 189                     tui_set_win_focus_to (TUI_DATA_WIN);
 190                   layout_def->display_mode = SRC_WIN;
 191                   break;
 192                 case DISASSEM_DATA_COMMAND:
 193                   /* The previous layout was not showing code.
 194                      This can happen if there is no source
 195                      available:
 196
 197                      1. if the source file is in another dir OR
 198                      2. if target was compiled without -g
 199                      We still want to show the assembly though!  */
 200
 201                   tui_get_begin_asm_address (&gdbarch, &addr);
 202                   if (win_with_focus != TUI_DATA_WIN)
 203                     tui_set_win_focus_to (TUI_DISASM_WIN);
 204                   else
 205                     tui_set_win_focus_to (TUI_DATA_WIN);
 206                   layout_def->display_mode = DISASSEM_WIN;
 207                   break;
 208                 default:
 209                   break;
 210                 }
 211             }
 212           /*
 213            * Now update the window content.
 214            */
 215           if (!regs_populate
 216               && (new_layout == SRC_DATA_COMMAND
 217                   || new_layout == DISASSEM_DATA_COMMAND))
 218             TUI_DATA_WIN->display_all_data ();
 219
 220           tui_update_source_windows_with_addr (gdbarch, addr);
 221
 222           if (regs_populate)
 223             tui_show_registers (TUI_DATA_WIN->current_group);
 224         }
 225     }
 226   else
 227     status = TUI_FAILURE;
 228
 229   return status;
 230 }
 231
 232 /* Add the specified window to the layout in a logical way.  This
 233    means setting up the most logical layout given the window to be
 234    added.  */
 235 void
 236 tui_add_win_to_layout (enum tui_win_type type)
 237 {
 238   enum tui_layout_type cur_layout = tui_current_layout ();
 239
 240   switch (type)
 241     {
 242     case SRC_WIN:
 243       if (cur_layout != SRC_COMMAND
 244           && cur_layout != SRC_DISASSEM_COMMAND
 245           && cur_layout != SRC_DATA_COMMAND)
 246         {
 247           tui_clear_source_windows_detail ();
 248           if (cur_layout == DISASSEM_DATA_COMMAND)
 249             show_layout (SRC_DATA_COMMAND);
 250           else
 251             show_layout (SRC_COMMAND);
 252         }
 253       break;
 254     case DISASSEM_WIN:
 255       if (cur_layout != DISASSEM_COMMAND
 256           && cur_layout != SRC_DISASSEM_COMMAND
 257           && cur_layout != DISASSEM_DATA_COMMAND)
 258         {
 259           tui_clear_source_windows_detail ();
 260           if (cur_layout == SRC_DATA_COMMAND)
 261             show_layout (DISASSEM_DATA_COMMAND);
 262           else
 263             show_layout (DISASSEM_COMMAND);
 264         }
 265       break;
 266     case DATA_WIN:
 267       if (cur_layout != SRC_DATA_COMMAND
 268           && cur_layout != DISASSEM_DATA_COMMAND)
 269         {
 270           if (cur_layout == DISASSEM_COMMAND)
 271             show_layout (DISASSEM_DATA_COMMAND);
 272           else
 273             show_layout (SRC_DATA_COMMAND);
 274         }
 275       break;
 276     default:
 277       break;
 278     }
 279 }
 280
 281
 282 /* Answer the height of a window.  If it hasn't been created yet,
 283    answer what the height of a window would be based upon its type and
 284    the layout.  */
 285 int
 286 tui_default_win_height (enum tui_win_type type,
 287                         enum tui_layout_type layout)
 288 {
 289   int h;
 290
 291   if (tui_win_list[type] != NULL)
 292     h = tui_win_list[type]->height;
 293   else
 294     {
 295       switch (layout)
 296         {
 297         case SRC_COMMAND:
 298         case DISASSEM_COMMAND:
 299           if (TUI_CMD_WIN == NULL)
 300             h = tui_term_height () / 2;
 301           else
 302             h = tui_term_height () - TUI_CMD_WIN->height;
 303           break;
 304         case SRC_DISASSEM_COMMAND:
 305         case SRC_DATA_COMMAND:
 306         case DISASSEM_DATA_COMMAND:
 307           if (TUI_CMD_WIN == NULL)
 308             h = tui_term_height () / 3;
 309           else
 310             h = (tui_term_height () - TUI_CMD_WIN->height) / 2;
 311           break;
 312         default:
 313           h = 0;
 314           break;
 315         }
 316     }
 317
 318   return h;
 319 }
 320
 321
 322 /* Answer the height of a window.  If it hasn't been created yet,
 323    answer what the height of a window would be based upon its type and
 324    the layout.  */
 325 int
 326 tui_default_win_viewport_height (enum tui_win_type type,
 327                                  enum tui_layout_type layout)
 328 {
 329   int h;
 330
 331   h = tui_default_win_height (type, layout);
 332
 333   if (tui_win_list[type] == TUI_CMD_WIN)
 334     h -= 1;
 335   else
 336     h -= 2;
 337
 338   return h;
 339 }
 340
 341 /* Complete possible layout names.  TEXT is the complete text entered so
 342    far, WORD is the word currently being completed.  */
 343
 344 static void
 345 layout_completer (struct cmd_list_element *ignore,
 346                   completion_tracker &tracker,
 347                   const char *text, const char *word)
 348 {
 349   static const char *layout_names [] =
 350     { "src", "asm", "split", "regs", "next", "prev", NULL };
 351
 352   complete_on_enum (tracker, layout_names, text, word);
 353 }
 354
 355 /* Function to initialize gdb commands, for tui window layout
 356    manipulation.  */
 357
 358 void
 359 _initialize_tui_layout (void)
 360 {
 361   struct cmd_list_element *cmd;
 362
 363   cmd = add_com ("layout", class_tui, tui_layout_command, _("\
 364 Change the layout of windows.\n\
 365 Usage: layout prev | next | LAYOUT-NAME\n\
 366 Layout names are:\n\
 367    src   : Displays source and command windows.\n\
 368    asm   : Displays disassembly and command windows.\n\
 369    split : Displays source, disassembly and command windows.\n\
 370    regs  : Displays register window. If existing layout\n\
 371            is source/command or assembly/command, the \n\
 372            register window is displayed. If the\n\
 373            source/assembly/command (split) is displayed, \n\
 374            the register window is displayed with \n\
 375            the window that has current logical focus."));
 376   set_cmd_completer (cmd, layout_completer);
 377 }
 378
 379
 380 /*************************
 381 ** STATIC LOCAL FUNCTIONS
 382 **************************/
 383
 384
 385 /* Function to set the layout to SRC, ASM, SPLIT, NEXT, PREV, DATA, or
 386    REGS. */
 387 enum tui_status
 388 tui_set_layout_by_name (const char *layout_name)
 389 {
 390   enum tui_status status = TUI_SUCCESS;
 391
 392   if (layout_name != NULL)
 393     {
 394       int i;
 395       enum tui_layout_type new_layout = UNDEFINED_LAYOUT;
 396       enum tui_layout_type cur_layout = tui_current_layout ();
 397
 398       std::string copy = layout_name;
 399       for (i = 0; i < copy.size (); i++)
 400         copy[i] = toupper (copy[i]);
 401       const char *buf_ptr = copy.c_str ();
 402
 403       /* First check for ambiguous input.  */
 404       if (strlen (buf_ptr) <= 1 && *buf_ptr == 'S')
 405         {
 406           warning (_("Ambiguous command input."));
 407           status = TUI_FAILURE;
 408         }
 409       else
 410         {
 411           if (subset_compare (buf_ptr, "SRC"))
 412             new_layout = SRC_COMMAND;
 413           else if (subset_compare (buf_ptr, "ASM"))
 414             new_layout = DISASSEM_COMMAND;
 415           else if (subset_compare (buf_ptr, "SPLIT"))
 416             new_layout = SRC_DISASSEM_COMMAND;
 417           else if (subset_compare (buf_ptr, "REGS"))
 418             {
 419               if (cur_layout == SRC_COMMAND
 420                   || cur_layout == SRC_DATA_COMMAND)
 421                 new_layout = SRC_DATA_COMMAND;
 422               else
 423                 new_layout = DISASSEM_DATA_COMMAND;
 424             }
 425           else if (subset_compare (buf_ptr, "NEXT"))
 426             new_layout = next_layout ();
 427           else if (subset_compare (buf_ptr, "PREV"))
 428             new_layout = prev_layout ();
 429           else
 430             status = TUI_FAILURE;
 431
 432           if (status == TUI_SUCCESS)
 433             {
 434               /* Make sure the curses mode is enabled.  */
 435               tui_enable ();
 436               tui_set_layout (new_layout);
 437             }
 438         }
 439     }
 440   else
 441     status = TUI_FAILURE;
 442
 443   return status;
 444 }
 445
 446
 447 static void
 448 extract_display_start_addr (struct gdbarch **gdbarch_p, CORE_ADDR *addr_p)
 449 {
 450   enum tui_layout_type cur_layout = tui_current_layout ();
 451   struct gdbarch *gdbarch = get_current_arch ();
 452   CORE_ADDR addr;
 453   CORE_ADDR pc;
 454   struct symtab_and_line cursal = get_current_source_symtab_and_line ();
 455
 456   switch (cur_layout)
 457     {
 458     case SRC_COMMAND:
 459     case SRC_DATA_COMMAND:
 460       gdbarch = TUI_SRC_WIN->gdbarch;
 461       find_line_pc (cursal.symtab,
 462                     TUI_SRC_WIN->start_line_or_addr.u.line_no,
 463                     &pc);
 464       addr = pc;
 465       break;
 466     case DISASSEM_COMMAND:
 467     case SRC_DISASSEM_COMMAND:
 468     case DISASSEM_DATA_COMMAND:
 469       gdbarch = TUI_DISASM_WIN->gdbarch;
 470       addr = TUI_DISASM_WIN->start_line_or_addr.u.addr;
 471       break;
 472     default:
 473       addr = 0;
 474       break;
 475     }
 476
 477   *gdbarch_p = gdbarch;
 478   *addr_p = addr;
 479 }
 480
 481
 482 static void
 483 tui_layout_command (const char *arg, int from_tty)
 484 {
 485   /* Switch to the selected layout.  */
 486   if (tui_set_layout_by_name (arg) != TUI_SUCCESS)
 487     warning (_("Invalid layout specified.\n%s"), LAYOUT_USAGE);
 488 }
 489
 490 /* Answer the previous layout to cycle to.  */
 491 static enum tui_layout_type
 492 next_layout (void)
 493 {
 494   int new_layout;
 495
 496   new_layout = tui_current_layout ();
 497   if (new_layout == UNDEFINED_LAYOUT)
 498     new_layout = SRC_COMMAND;
 499   else
 500     {
 501       new_layout++;
 502       if (new_layout == UNDEFINED_LAYOUT)
 503         new_layout = SRC_COMMAND;
 504     }
 505
 506   return (enum tui_layout_type) new_layout;
 507 }
 508
 509
 510 /* Answer the next layout to cycle to.  */
 511 static enum tui_layout_type
 512 prev_layout (void)
 513 {
 514   int new_layout;
 515
 516   new_layout = tui_current_layout ();
 517   if (new_layout == SRC_COMMAND)
 518     new_layout = DISASSEM_DATA_COMMAND;
 519   else
 520     {
 521       new_layout--;
 522       if (new_layout == UNDEFINED_LAYOUT)
 523         new_layout = DISASSEM_DATA_COMMAND;
 524     }
 525
 526   return (enum tui_layout_type) new_layout;
 527 }
 528
 529
 530
 531 static struct tui_win_info *
 532 make_command_window (int height, int origin_y)
 533 {
 534   struct tui_win_info *result
 535     = (struct tui_win_info *) init_and_make_win (NULL,
 536                                                  CMD_WIN,
 537                                                  height,
 538                                                  tui_term_width (),
 539                                                  0,
 540                                                  origin_y,
 541                                                  DONT_BOX_WINDOW);
 542   return result;
 543 }
 544
 545
 546 /* make_source_window().
 547  */
 548 static struct tui_win_info *
 549 make_source_window (int height, int origin_y)
 550 {
 551   return make_source_or_disasm_window (SRC_WIN, height, origin_y);
 552 }                               /* make_source_window */
 553
 554
 555 /* make_disasm_window().
 556  */
 557 static struct tui_win_info *
 558 make_disasm_window (int height, int origin_y)
 559 {
 560   return make_source_or_disasm_window (DISASSEM_WIN, height, origin_y);
 561 }                               /* make_disasm_window */
 562
 563
 564 static void
 565 make_data_window (struct tui_win_info **win_info_ptr,
 566                   int height, int origin_y)
 567 {
 568   *win_info_ptr
 569     = (struct tui_win_info *) init_and_make_win (*win_info_ptr,
 570                                                  DATA_WIN,
 571                                                  height,
 572                                                  tui_term_width (),
 573                                                  0,
 574                                                  origin_y,
 575                                                  BOX_WINDOW);
 576 }
 577
 578
 579
 580 /* Show the Source/Command layout.  */
 581 static void
 582 show_source_command (void)
 583 {
 584   show_source_or_disasm_and_command (SRC_COMMAND);
 585 }
 586
 587
 588 /* Show the Dissassem/Command layout.  */
 589 static void
 590 show_disasm_command (void)
 591 {
 592   show_source_or_disasm_and_command (DISASSEM_COMMAND);
 593 }
 594
 595
 596 /* Show the Source/Disassem/Command layout.  */
 597 static void
 598 show_source_disasm_command (void)
 599 {
 600   if (tui_current_layout () != SRC_DISASSEM_COMMAND)
 601     {
 602       int cmd_height, src_height, asm_height;
 603
 604       if (TUI_CMD_WIN != NULL)
 605         cmd_height = TUI_CMD_WIN->height;
 606       else
 607         cmd_height = tui_term_height () / 3;
 608
 609       src_height = (tui_term_height () - cmd_height) / 2;
 610       asm_height = tui_term_height () - (src_height + cmd_height);
 611
 612       if (TUI_SRC_WIN == NULL)
 613         tui_win_list[SRC_WIN] = make_source_window (src_height, 0);
 614       else
 615         {
 616           TUI_SRC_WIN->reset (TUI_SRC_WIN->type,
 617                               src_height,
 618                               TUI_SRC_WIN->width,
 619                               TUI_SRC_WIN->execution_info->width,
 620                               0);
 621           TUI_SRC_WIN->execution_info->reset (EXEC_INFO_WIN,
 622                                               src_height,
 623                                               3,
 624                                               0,
 625                                               0);
 626           tui_make_visible (TUI_SRC_WIN);
 627           tui_make_visible (TUI_SRC_WIN->execution_info);
 628           TUI_SRC_WIN->m_has_locator = false;
 629         }
 630
 631       struct tui_locator_window *locator = tui_locator_win_info_ptr ();
 632       gdb_assert (locator != nullptr);
 633
 634       tui_show_source_content (TUI_SRC_WIN);
 635       if (TUI_DISASM_WIN == NULL)
 636         {
 637           tui_win_list[DISASSEM_WIN]
 638             = make_disasm_window (asm_height, src_height - 1);
 639           init_and_make_win (locator,
 640                              LOCATOR_WIN,
 641                              2 /* 1 */ ,
 642                              tui_term_width (),
 643                              0,
 644                              (src_height + asm_height) - 1,
 645                              DONT_BOX_WINDOW);
 646         }
 647       else
 648         {
 649           locator->reset (LOCATOR_WIN,
 650                           2 /* 1 */ ,
 651                           tui_term_width (),
 652                           0,
 653                           (src_height + asm_height) - 1);
 654           TUI_DISASM_WIN->m_has_locator = true;
 655           TUI_DISASM_WIN->reset (TUI_DISASM_WIN->type,
 656                                  asm_height,
 657                                  TUI_DISASM_WIN->width,
 658                                  TUI_DISASM_WIN->execution_info->width,
 659                                  src_height - 1);
 660           TUI_DISASM_WIN->execution_info->reset (EXEC_INFO_WIN,
 661                                                  asm_height,
 662                                                  3,
 663                                                  0,
 664                                                  src_height - 1);
 665           tui_make_visible (TUI_DISASM_WIN);
 666           tui_make_visible (TUI_DISASM_WIN->execution_info);
 667         }
 668       TUI_SRC_WIN->m_has_locator = false;
 669       TUI_DISASM_WIN->m_has_locator = true;
 670       tui_make_visible (locator);
 671       tui_show_locator_content ();
 672       tui_show_source_content (TUI_DISASM_WIN);
 673
 674       if (TUI_CMD_WIN == NULL)
 675         tui_win_list[CMD_WIN]
 676           = make_command_window (cmd_height, tui_term_height () - cmd_height);
 677       else
 678         {
 679           TUI_CMD_WIN->reset (TUI_CMD_WIN->type,
 680                               TUI_CMD_WIN->height,
 681                               TUI_CMD_WIN->width,
 682                               0,
 683                               TUI_CMD_WIN->origin.y);
 684           tui_make_visible (TUI_CMD_WIN);
 685         }
 686       tui_set_current_layout_to (SRC_DISASSEM_COMMAND);
 687     }
 688 }
 689
 690
 691 /* Show the Source/Data/Command or the Dissassembly/Data/Command
 692    layout.  */
 693 static void
 694 show_data (enum tui_layout_type new_layout)
 695 {
 696   int total_height = (tui_term_height () - TUI_CMD_WIN->height);
 697   int src_height, data_height;
 698   enum tui_win_type win_type;
 699
 700   struct tui_locator_window *locator = tui_locator_win_info_ptr ();
 701   gdb_assert (locator != nullptr);
 702
 703   data_height = total_height / 2;
 704   src_height = total_height - data_height;
 705   tui_make_all_invisible ();
 706   tui_make_invisible (locator);
 707   make_data_window (&tui_win_list[DATA_WIN], data_height, 0);
 708   if (new_layout == SRC_DATA_COMMAND)
 709     win_type = SRC_WIN;
 710   else
 711     win_type = DISASSEM_WIN;
 712
 713   tui_source_window_base *base;
 714   if (tui_win_list[win_type] == NULL)
 715     {
 716       if (win_type == SRC_WIN)
 717         tui_win_list[win_type]
 718           = make_source_window (src_height, data_height - 1);
 719       else
 720         tui_win_list[win_type]
 721           = make_disasm_window (src_height, data_height - 1);
 722       init_and_make_win (locator,
 723                              LOCATOR_WIN,
 724                              2 /* 1 */ ,
 725                              tui_term_width (),
 726                              0,
 727                              total_height - 1,
 728                              DONT_BOX_WINDOW);
 729       base = (tui_source_window_base *) tui_win_list[win_type];
 730     }
 731   else
 732     {
 733       base = (tui_source_window_base *) tui_win_list[win_type];
 734       tui_win_list[win_type]->reset (tui_win_list[win_type]->type,
 735                                      src_height,
 736                                      tui_win_list[win_type]->width,
 737                                      base->execution_info->width,
 738                                      data_height - 1);
 739       base->execution_info->reset (EXEC_INFO_WIN,
 740                                    src_height,
 741                                    3,
 742                                    0,
 743                                    data_height - 1);
 744       tui_make_visible (tui_win_list[win_type]);
 745       tui_make_visible (base->execution_info);
 746       locator->reset (LOCATOR_WIN,
 747                       2 /* 1 */ ,
 748                       tui_term_width (),
 749                       0,
 750                       total_height - 1);
 751     }
 752   base->m_has_locator = true;
 753   tui_make_visible (locator);
 754   tui_show_locator_content ();
 755   tui_add_to_source_windows
 756     ((tui_source_window_base *) tui_win_list[win_type]);
 757   tui_set_current_layout_to (new_layout);
 758 }
 759
 760 void
 761 tui_gen_win_info::reset (enum tui_win_type win_type,
 762                          int height_, int width_,
 763                          int origin_x_, int origin_y_)
 764 {
 765   int h = height_;
 766
 767   gdb_assert (type == win_type);
 768
 769   width = width_;
 770   height = h;
 771   if (h > 1)
 772     {
 773       viewport_height = h - 1;
 774       if (type != CMD_WIN)
 775         viewport_height--;
 776     }
 777   else
 778     viewport_height = 1;
 779   origin.x = origin_x_;
 780   origin.y = origin_y_;
 781 }
 782
 783 /* init_and_make_win().
 784  */
 785 static tui_gen_win_info *
 786 init_and_make_win (tui_gen_win_info *win_info,
 787                    enum tui_win_type win_type,
 788                    int height, int width,
 789                    int origin_x, int origin_y,
 790                    enum tui_box box_it)
 791 {
 792   if (win_info == NULL)
 793     {
 794       switch (win_type)
 795         {
 796         case SRC_WIN:
 797           win_info = new tui_source_window ();
 798           break;
 799
 800         case DISASSEM_WIN:
 801           win_info = new tui_disasm_window ();
 802           break;
 803
 804         case DATA_WIN:
 805           win_info = new tui_data_window ();
 806           break;
 807
 808         case CMD_WIN:
 809           win_info = new tui_cmd_window ();
 810           break;
 811
 812         case EXEC_INFO_WIN:
 813           win_info = new tui_exec_info_window ();
 814           break;
 815
 816         default:
 817           gdb_assert_not_reached (_("unhandled window type"));
 818         }
 819     }
 820
 821   win_info->reset (win_type, height, width, origin_x, origin_y);
 822   tui_make_window (win_info, box_it);
 823
 824   return win_info;
 825 }
 826
 827
 828 static struct tui_win_info *
 829 make_source_or_disasm_window (enum tui_win_type type,
 830                               int height, int origin_y)
 831 {
 832   struct tui_exec_info_window *execution_info
 833     = (tui_exec_info_window *) init_and_make_win (nullptr,
 834                                                   EXEC_INFO_WIN,
 835                                                   height,
 836                                                   3,
 837                                                   0,
 838                                                   origin_y,
 839                                                   DONT_BOX_WINDOW);
 840
 841   /* Now create the source window.  */
 842   struct tui_source_window_base *result
 843     = ((struct tui_source_window_base *)
 844        init_and_make_win (NULL,
 845                           type,
 846                           height,
 847                           tui_term_width () - execution_info->width,
 848                           execution_info->width,
 849                           origin_y,
 850                           BOX_WINDOW));
 851   result->execution_info = execution_info;
 852   return result;
 853 }
 854
 855
 856 /* Show the Source/Command or the Disassem layout.  */
 857 static void
 858 show_source_or_disasm_and_command (enum tui_layout_type layout_type)
 859 {
 860   if (tui_current_layout () != layout_type)
 861     {
 862       struct tui_win_info **win_info_ptr;
 863       int src_height, cmd_height;
 864       struct tui_locator_window *locator = tui_locator_win_info_ptr ();
 865       gdb_assert (locator != nullptr);
 866
 867       if (TUI_CMD_WIN != NULL)
 868         cmd_height = TUI_CMD_WIN->height;
 869       else
 870         cmd_height = tui_term_height () / 3;
 871       src_height = tui_term_height () - cmd_height;
 872
 873       if (layout_type == SRC_COMMAND)
 874         win_info_ptr = &tui_win_list[SRC_WIN];
 875       else
 876         win_info_ptr = &tui_win_list[DISASSEM_WIN];
 877
 878       tui_source_window_base *base;
 879       if ((*win_info_ptr) == NULL)
 880         {
 881           if (layout_type == SRC_COMMAND)
 882             *win_info_ptr = make_source_window (src_height - 1, 0);
 883           else
 884             *win_info_ptr = make_disasm_window (src_height - 1, 0);
 885           init_and_make_win (locator,
 886                              LOCATOR_WIN,
 887                              2 /* 1 */ ,
 888                              tui_term_width (),
 889                              0,
 890                              src_height - 1,
 891                              DONT_BOX_WINDOW);
 892           base = (tui_source_window_base *) *win_info_ptr;
 893         }
 894       else
 895         {
 896           base = (tui_source_window_base *) *win_info_ptr;
 897           locator->reset (LOCATOR_WIN,
 898                           2 /* 1 */ ,
 899                           tui_term_width (),
 900                           0,
 901                           src_height - 1);
 902           base->m_has_locator = true;
 903           (*win_info_ptr)->reset ((*win_info_ptr)->type,
 904                                   src_height - 1,
 905                                   (*win_info_ptr)->width,
 906                                   base->execution_info->width,
 907                                   0);
 908           base->execution_info->reset (EXEC_INFO_WIN,
 909                                        src_height - 1,
 910                                        3,
 911                                        0,
 912                                        0);
 913           tui_make_visible (*win_info_ptr);
 914           tui_make_visible (base->execution_info);
 915         }
 916
 917       base->m_has_locator = true;
 918       tui_make_visible (locator);
 919       tui_show_locator_content ();
 920       tui_show_source_content (base);
 921
 922       if (TUI_CMD_WIN == NULL)
 923         {
 924           tui_win_list[CMD_WIN] = make_command_window (cmd_height,
 925                                                        src_height);
 926         }
 927       else
 928         {
 929           TUI_CMD_WIN->reset (TUI_CMD_WIN->type,
 930                               TUI_CMD_WIN->height,
 931                               TUI_CMD_WIN->width,
 932                               TUI_CMD_WIN->origin.x,
 933                               TUI_CMD_WIN->origin.y);
 934           tui_make_visible (TUI_CMD_WIN);
 935         }
 936       tui_set_current_layout_to (layout_type);
 937     }
 938 }