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_free_all_source_wins_content ();
  85       tui_clear_source_windows ();
  86       if (layout == SRC_DATA_COMMAND
  87           || layout == DISASSEM_DATA_COMMAND)
  88         {
  89           show_data (layout);
  90           tui_refresh_all (tui_win_list);
  91         }
  92       else
  93         {
  94           /* First make the current layout be invisible.  */
  95           tui_make_all_invisible ();
  96           tui_make_invisible (tui_locator_win_info_ptr ());
  97
  98           switch (layout)
  99             {
 100               /* Now show the new layout.  */
 101             case SRC_COMMAND:
 102               show_source_command ();
 103               tui_add_to_source_windows (TUI_SRC_WIN);
 104               break;
 105             case DISASSEM_COMMAND:
 106               show_disasm_command ();
 107               tui_add_to_source_windows (TUI_DISASM_WIN);
 108               break;
 109             case SRC_DISASSEM_COMMAND:
 110               show_source_disasm_command ();
 111               tui_add_to_source_windows (TUI_SRC_WIN);
 112               tui_add_to_source_windows (TUI_DISASM_WIN);
 113               break;
 114             default:
 115               break;
 116             }
 117         }
 118     }
 119 }
 120
 121
 122 /* Function to set the layout to SRC_COMMAND, DISASSEM_COMMAND,
 123    SRC_DISASSEM_COMMAND, SRC_DATA_COMMAND, or DISASSEM_DATA_COMMAND.  */
 124 enum tui_status
 125 tui_set_layout (enum tui_layout_type layout_type)
 126 {
 127   enum tui_status status = TUI_SUCCESS;
 128
 129   if (layout_type != UNDEFINED_LAYOUT)
 130     {
 131       enum tui_layout_type cur_layout = tui_current_layout (),
 132         new_layout = UNDEFINED_LAYOUT;
 133       int regs_populate = FALSE;
 134       struct gdbarch *gdbarch;
 135       CORE_ADDR addr;
 136       struct tui_win_info *win_with_focus = tui_win_with_focus ();
 137       struct tui_layout_def *layout_def = tui_layout_def ();
 138
 139       extract_display_start_addr (&gdbarch, &addr);
 140
 141       new_layout = layout_type;
 142
 143       regs_populate = (new_layout == SRC_DATA_COMMAND
 144                        || new_layout == DISASSEM_DATA_COMMAND);
 145       if (new_layout != cur_layout)
 146         {
 147           show_layout (new_layout);
 148
 149           /* Now determine where focus should be.  */
 150           if (win_with_focus != TUI_CMD_WIN)
 151             {
 152               switch (new_layout)
 153                 {
 154                 case SRC_COMMAND:
 155                   tui_set_win_focus_to (TUI_SRC_WIN);
 156                   layout_def->display_mode = SRC_WIN;
 157                   layout_def->split = FALSE;
 158                   break;
 159                 case 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                   tui_set_win_focus_to (TUI_DISASM_WIN);
 170                   layout_def->display_mode = DISASSEM_WIN;
 171                   layout_def->split = FALSE;
 172                   break;
 173                 case SRC_DISASSEM_COMMAND:
 174                   /* The previous layout was not showing code.
 175                      This can happen if there is no source
 176                      available:
 177
 178                      1. if the source file is in another dir OR
 179                      2. if target was compiled without -g
 180                      We still want to show the assembly though!  */
 181
 182                   tui_get_begin_asm_address (&gdbarch, &addr);
 183                   if (win_with_focus == TUI_SRC_WIN)
 184                     tui_set_win_focus_to (TUI_SRC_WIN);
 185                   else
 186                     tui_set_win_focus_to (TUI_DISASM_WIN);
 187                   layout_def->split = TRUE;
 188                   break;
 189                 case SRC_DATA_COMMAND:
 190                   if (win_with_focus != TUI_DATA_WIN)
 191                     tui_set_win_focus_to (TUI_SRC_WIN);
 192                   else
 193                     tui_set_win_focus_to (TUI_DATA_WIN);
 194                   layout_def->display_mode = SRC_WIN;
 195                   layout_def->split = FALSE;
 196                   break;
 197                 case DISASSEM_DATA_COMMAND:
 198                   /* The previous layout was not showing code.
 199                      This can happen if there is no source
 200                      available:
 201
 202                      1. if the source file is in another dir OR
 203                      2. if target was compiled without -g
 204                      We still want to show the assembly though!  */
 205
 206                   tui_get_begin_asm_address (&gdbarch, &addr);
 207                   if (win_with_focus != TUI_DATA_WIN)
 208                     tui_set_win_focus_to (TUI_DISASM_WIN);
 209                   else
 210                     tui_set_win_focus_to (TUI_DATA_WIN);
 211                   layout_def->display_mode = DISASSEM_WIN;
 212                   layout_def->split = FALSE;
 213                   break;
 214                 default:
 215                   break;
 216                 }
 217             }
 218           /*
 219            * Now update the window content.
 220            */
 221           if (!regs_populate
 222               && (new_layout == SRC_DATA_COMMAND
 223                   || new_layout == DISASSEM_DATA_COMMAND))
 224             tui_display_all_data ();
 225
 226           tui_update_source_windows_with_addr (gdbarch, addr);
 227
 228           if (regs_populate)
 229             tui_show_registers (TUI_DATA_WIN->current_group);
 230         }
 231     }
 232   else
 233     status = TUI_FAILURE;
 234
 235   return status;
 236 }
 237
 238 /* Add the specified window to the layout in a logical way.  This
 239    means setting up the most logical layout given the window to be
 240    added.  */
 241 void
 242 tui_add_win_to_layout (enum tui_win_type type)
 243 {
 244   enum tui_layout_type cur_layout = tui_current_layout ();
 245
 246   switch (type)
 247     {
 248     case SRC_WIN:
 249       if (cur_layout != SRC_COMMAND
 250           && cur_layout != SRC_DISASSEM_COMMAND
 251           && cur_layout != SRC_DATA_COMMAND)
 252         {
 253           tui_clear_source_windows_detail ();
 254           if (cur_layout == DISASSEM_DATA_COMMAND)
 255             show_layout (SRC_DATA_COMMAND);
 256           else
 257             show_layout (SRC_COMMAND);
 258         }
 259       break;
 260     case DISASSEM_WIN:
 261       if (cur_layout != DISASSEM_COMMAND
 262           && cur_layout != SRC_DISASSEM_COMMAND
 263           && cur_layout != DISASSEM_DATA_COMMAND)
 264         {
 265           tui_clear_source_windows_detail ();
 266           if (cur_layout == SRC_DATA_COMMAND)
 267             show_layout (DISASSEM_DATA_COMMAND);
 268           else
 269             show_layout (DISASSEM_COMMAND);
 270         }
 271       break;
 272     case DATA_WIN:
 273       if (cur_layout != SRC_DATA_COMMAND
 274           && cur_layout != DISASSEM_DATA_COMMAND)
 275         {
 276           if (cur_layout == DISASSEM_COMMAND)
 277             show_layout (DISASSEM_DATA_COMMAND);
 278           else
 279             show_layout (SRC_DATA_COMMAND);
 280         }
 281       break;
 282     default:
 283       break;
 284     }
 285 }
 286
 287
 288 /* Answer the height of a window.  If it hasn't been created yet,
 289    answer what the height of a window would be based upon its type and
 290    the layout.  */
 291 int
 292 tui_default_win_height (enum tui_win_type type,
 293                         enum tui_layout_type layout)
 294 {
 295   int h;
 296
 297   if (tui_win_list[type] != NULL)
 298     h = tui_win_list[type]->height;
 299   else
 300     {
 301       switch (layout)
 302         {
 303         case SRC_COMMAND:
 304         case DISASSEM_COMMAND:
 305           if (TUI_CMD_WIN == NULL)
 306             h = tui_term_height () / 2;
 307           else
 308             h = tui_term_height () - TUI_CMD_WIN->height;
 309           break;
 310         case SRC_DISASSEM_COMMAND:
 311         case SRC_DATA_COMMAND:
 312         case DISASSEM_DATA_COMMAND:
 313           if (TUI_CMD_WIN == NULL)
 314             h = tui_term_height () / 3;
 315           else
 316             h = (tui_term_height () - TUI_CMD_WIN->height) / 2;
 317           break;
 318         default:
 319           h = 0;
 320           break;
 321         }
 322     }
 323
 324   return h;
 325 }
 326
 327
 328 /* Answer the height of a window.  If it hasn't been created yet,
 329    answer what the height of a window would be based upon its type and
 330    the layout.  */
 331 int
 332 tui_default_win_viewport_height (enum tui_win_type type,
 333                                  enum tui_layout_type layout)
 334 {
 335   int h;
 336
 337   h = tui_default_win_height (type, layout);
 338
 339   if (tui_win_list[type] == TUI_CMD_WIN)
 340     h -= 1;
 341   else
 342     h -= 2;
 343
 344   return h;
 345 }
 346
 347 /* Complete possible layout names.  TEXT is the complete text entered so
 348    far, WORD is the word currently being completed.  */
 349
 350 static void
 351 layout_completer (struct cmd_list_element *ignore,
 352                   completion_tracker &tracker,
 353                   const char *text, const char *word)
 354 {
 355   static const char *layout_names [] =
 356     { "src", "asm", "split", "regs", "next", "prev", NULL };
 357
 358   complete_on_enum (tracker, layout_names, text, word);
 359 }
 360
 361 /* Function to initialize gdb commands, for tui window layout
 362    manipulation.  */
 363
 364 void
 365 _initialize_tui_layout (void)
 366 {
 367   struct cmd_list_element *cmd;
 368
 369   cmd = add_com ("layout", class_tui, tui_layout_command, _("\
 370 Change the layout of windows.\n\
 371 Usage: layout prev | next | LAYOUT-NAME\n\
 372 Layout names are:\n\
 373    src   : Displays source and command windows.\n\
 374    asm   : Displays disassembly and command windows.\n\
 375    split : Displays source, disassembly and command windows.\n\
 376    regs  : Displays register window. If existing layout\n\
 377            is source/command or assembly/command, the \n\
 378            register window is displayed. If the\n\
 379            source/assembly/command (split) is displayed, \n\
 380            the register window is displayed with \n\
 381            the window that has current logical focus."));
 382   set_cmd_completer (cmd, layout_completer);
 383 }
 384
 385
 386 /*************************
 387 ** STATIC LOCAL FUNCTIONS
 388 **************************/
 389
 390
 391 /* Function to set the layout to SRC, ASM, SPLIT, NEXT, PREV, DATA, or
 392    REGS. */
 393 enum tui_status
 394 tui_set_layout_by_name (const char *layout_name)
 395 {
 396   enum tui_status status = TUI_SUCCESS;
 397
 398   if (layout_name != NULL)
 399     {
 400       int i;
 401       enum tui_layout_type new_layout = UNDEFINED_LAYOUT;
 402       enum tui_layout_type cur_layout = tui_current_layout ();
 403
 404       std::string copy = layout_name;
 405       for (i = 0; i < copy.size (); i++)
 406         copy[i] = toupper (copy[i]);
 407       const char *buf_ptr = copy.c_str ();
 408
 409       /* First check for ambiguous input.  */
 410       if (strlen (buf_ptr) <= 1 && *buf_ptr == 'S')
 411         {
 412           warning (_("Ambiguous command input."));
 413           status = TUI_FAILURE;
 414         }
 415       else
 416         {
 417           if (subset_compare (buf_ptr, "SRC"))
 418             new_layout = SRC_COMMAND;
 419           else if (subset_compare (buf_ptr, "ASM"))
 420             new_layout = DISASSEM_COMMAND;
 421           else if (subset_compare (buf_ptr, "SPLIT"))
 422             new_layout = SRC_DISASSEM_COMMAND;
 423           else if (subset_compare (buf_ptr, "REGS"))
 424             {
 425               if (cur_layout == SRC_COMMAND
 426                   || cur_layout == SRC_DATA_COMMAND)
 427                 new_layout = SRC_DATA_COMMAND;
 428               else
 429                 new_layout = DISASSEM_DATA_COMMAND;
 430             }
 431           else if (subset_compare (buf_ptr, "NEXT"))
 432             new_layout = next_layout ();
 433           else if (subset_compare (buf_ptr, "PREV"))
 434             new_layout = prev_layout ();
 435           else
 436             status = TUI_FAILURE;
 437
 438           if (status == TUI_SUCCESS)
 439             {
 440               /* Make sure the curses mode is enabled.  */
 441               tui_enable ();
 442               tui_set_layout (new_layout);
 443             }
 444         }
 445     }
 446   else
 447     status = TUI_FAILURE;
 448
 449   return status;
 450 }
 451
 452
 453 static void
 454 extract_display_start_addr (struct gdbarch **gdbarch_p, CORE_ADDR *addr_p)
 455 {
 456   enum tui_layout_type cur_layout = tui_current_layout ();
 457   struct gdbarch *gdbarch = get_current_arch ();
 458   CORE_ADDR addr;
 459   CORE_ADDR pc;
 460   struct symtab_and_line cursal = get_current_source_symtab_and_line ();
 461
 462   switch (cur_layout)
 463     {
 464     case SRC_COMMAND:
 465     case SRC_DATA_COMMAND:
 466       gdbarch = TUI_SRC_WIN->gdbarch;
 467       find_line_pc (cursal.symtab,
 468                     TUI_SRC_WIN->start_line_or_addr.u.line_no,
 469                     &pc);
 470       addr = pc;
 471       break;
 472     case DISASSEM_COMMAND:
 473     case SRC_DISASSEM_COMMAND:
 474     case DISASSEM_DATA_COMMAND:
 475       gdbarch = TUI_DISASM_WIN->gdbarch;
 476       addr = TUI_DISASM_WIN->start_line_or_addr.u.addr;
 477       break;
 478     default:
 479       addr = 0;
 480       break;
 481     }
 482
 483   *gdbarch_p = gdbarch;
 484   *addr_p = addr;
 485 }
 486
 487
 488 static void
 489 tui_layout_command (const char *arg, int from_tty)
 490 {
 491   /* Switch to the selected layout.  */
 492   if (tui_set_layout_by_name (arg) != TUI_SUCCESS)
 493     warning (_("Invalid layout specified.\n%s"), LAYOUT_USAGE);
 494 }
 495
 496 /* Answer the previous layout to cycle to.  */
 497 static enum tui_layout_type
 498 next_layout (void)
 499 {
 500   int new_layout;
 501
 502   new_layout = tui_current_layout ();
 503   if (new_layout == UNDEFINED_LAYOUT)
 504     new_layout = SRC_COMMAND;
 505   else
 506     {
 507       new_layout++;
 508       if (new_layout == UNDEFINED_LAYOUT)
 509         new_layout = SRC_COMMAND;
 510     }
 511
 512   return (enum tui_layout_type) new_layout;
 513 }
 514
 515
 516 /* Answer the next layout to cycle to.  */
 517 static enum tui_layout_type
 518 prev_layout (void)
 519 {
 520   int new_layout;
 521
 522   new_layout = tui_current_layout ();
 523   if (new_layout == SRC_COMMAND)
 524     new_layout = DISASSEM_DATA_COMMAND;
 525   else
 526     {
 527       new_layout--;
 528       if (new_layout == UNDEFINED_LAYOUT)
 529         new_layout = DISASSEM_DATA_COMMAND;
 530     }
 531
 532   return (enum tui_layout_type) new_layout;
 533 }
 534
 535
 536
 537 static struct tui_win_info *
 538 make_command_window (int height, int origin_y)
 539 {
 540   struct tui_win_info *result
 541     = (struct tui_win_info *) init_and_make_win (NULL,
 542                                                  CMD_WIN,
 543                                                  height,
 544                                                  tui_term_width (),
 545                                                  0,
 546                                                  origin_y,
 547                                                  DONT_BOX_WINDOW);
 548   return result;
 549 }
 550
 551
 552 /* make_source_window().
 553  */
 554 static struct tui_win_info *
 555 make_source_window (int height, int origin_y)
 556 {
 557   return make_source_or_disasm_window (SRC_WIN, height, origin_y);
 558 }                               /* make_source_window */
 559
 560
 561 /* make_disasm_window().
 562  */
 563 static struct tui_win_info *
 564 make_disasm_window (int height, int origin_y)
 565 {
 566   return make_source_or_disasm_window (DISASSEM_WIN, height, origin_y);
 567 }                               /* make_disasm_window */
 568
 569
 570 static void
 571 make_data_window (struct tui_win_info **win_info_ptr,
 572                   int height, int origin_y)
 573 {
 574   *win_info_ptr
 575     = (struct tui_win_info *) init_and_make_win (*win_info_ptr,
 576                                                  DATA_WIN,
 577                                                  height,
 578                                                  tui_term_width (),
 579                                                  0,
 580                                                  origin_y,
 581                                                  BOX_WINDOW);
 582 }
 583
 584
 585
 586 /* Show the Source/Command layout.  */
 587 static void
 588 show_source_command (void)
 589 {
 590   show_source_or_disasm_and_command (SRC_COMMAND);
 591 }
 592
 593
 594 /* Show the Dissassem/Command layout.  */
 595 static void
 596 show_disasm_command (void)
 597 {
 598   show_source_or_disasm_and_command (DISASSEM_COMMAND);
 599 }
 600
 601
 602 /* Show the Source/Disassem/Command layout.  */
 603 static void
 604 show_source_disasm_command (void)
 605 {
 606   if (tui_current_layout () != SRC_DISASSEM_COMMAND)
 607     {
 608       int cmd_height, src_height, asm_height;
 609
 610       if (TUI_CMD_WIN != NULL)
 611         cmd_height = TUI_CMD_WIN->height;
 612       else
 613         cmd_height = tui_term_height () / 3;
 614
 615       src_height = (tui_term_height () - cmd_height) / 2;
 616       asm_height = tui_term_height () - (src_height + cmd_height);
 617
 618       if (TUI_SRC_WIN == NULL)
 619         tui_win_list[SRC_WIN] = make_source_window (src_height, 0);
 620       else
 621         {
 622           TUI_SRC_WIN->reset (TUI_SRC_WIN->type,
 623                               src_height,
 624                               TUI_SRC_WIN->width,
 625                               TUI_SRC_WIN->execution_info->width,
 626                               0);
 627           TUI_SRC_WIN->execution_info->reset (EXEC_INFO_WIN,
 628                                               src_height,
 629                                               3,
 630                                               0,
 631                                               0);
 632           tui_make_visible (TUI_SRC_WIN);
 633           tui_make_visible (TUI_SRC_WIN->execution_info);
 634           TUI_SRC_WIN->m_has_locator = false;
 635         }
 636
 637       struct tui_locator_window *locator = tui_locator_win_info_ptr ();
 638       gdb_assert (locator != nullptr);
 639
 640       tui_show_source_content (TUI_SRC_WIN);
 641       if (TUI_DISASM_WIN == NULL)
 642         {
 643           tui_win_list[DISASSEM_WIN]
 644             = make_disasm_window (asm_height, src_height - 1);
 645           init_and_make_win (locator,
 646                              LOCATOR_WIN,
 647                              2 /* 1 */ ,
 648                              tui_term_width (),
 649                              0,
 650                              (src_height + asm_height) - 1,
 651                              DONT_BOX_WINDOW);
 652         }
 653       else
 654         {
 655           locator->reset (LOCATOR_WIN,
 656                           2 /* 1 */ ,
 657                           tui_term_width (),
 658                           0,
 659                           (src_height + asm_height) - 1);
 660           TUI_DISASM_WIN->m_has_locator = true;
 661           TUI_DISASM_WIN->reset (TUI_DISASM_WIN->type,
 662                                  asm_height,
 663                                  TUI_DISASM_WIN->width,
 664                                  TUI_DISASM_WIN->execution_info->width,
 665                                  src_height - 1);
 666           TUI_DISASM_WIN->execution_info->reset (EXEC_INFO_WIN,
 667                                                  asm_height,
 668                                                  3,
 669                                                  0,
 670                                                  src_height - 1);
 671           tui_make_visible (TUI_DISASM_WIN);
 672           tui_make_visible (TUI_DISASM_WIN->execution_info);
 673         }
 674       TUI_SRC_WIN->m_has_locator = false;
 675       TUI_DISASM_WIN->m_has_locator = true;
 676       tui_make_visible (locator);
 677       tui_show_locator_content ();
 678       tui_show_source_content (TUI_DISASM_WIN);
 679
 680       if (TUI_CMD_WIN == NULL)
 681         tui_win_list[CMD_WIN]
 682           = make_command_window (cmd_height, tui_term_height () - cmd_height);
 683       else
 684         {
 685           TUI_CMD_WIN->reset (TUI_CMD_WIN->type,
 686                               TUI_CMD_WIN->height,
 687                               TUI_CMD_WIN->width,
 688                               0,
 689                               TUI_CMD_WIN->origin.y);
 690           tui_make_visible (TUI_CMD_WIN);
 691         }
 692       TUI_CMD_WIN->refresh_window ();
 693       tui_set_current_layout_to (SRC_DISASSEM_COMMAND);
 694     }
 695 }
 696
 697
 698 /* Show the Source/Data/Command or the Dissassembly/Data/Command
 699    layout.  */
 700 static void
 701 show_data (enum tui_layout_type new_layout)
 702 {
 703   int total_height = (tui_term_height () - TUI_CMD_WIN->height);
 704   int src_height, data_height;
 705   enum tui_win_type win_type;
 706
 707   struct tui_locator_window *locator = tui_locator_win_info_ptr ();
 708   gdb_assert (locator != nullptr);
 709
 710   data_height = total_height / 2;
 711   src_height = total_height - data_height;
 712   tui_make_all_invisible ();
 713   tui_make_invisible (locator);
 714   make_data_window (&tui_win_list[DATA_WIN], data_height, 0);
 715   if (new_layout == SRC_DATA_COMMAND)
 716     win_type = SRC_WIN;
 717   else
 718     win_type = DISASSEM_WIN;
 719
 720   tui_source_window_base *base;
 721   if (tui_win_list[win_type] == NULL)
 722     {
 723       if (win_type == SRC_WIN)
 724         tui_win_list[win_type]
 725           = make_source_window (src_height, data_height - 1);
 726       else
 727         tui_win_list[win_type]
 728           = make_disasm_window (src_height, data_height - 1);
 729       init_and_make_win (locator,
 730                              LOCATOR_WIN,
 731                              2 /* 1 */ ,
 732                              tui_term_width (),
 733                              0,
 734                              total_height - 1,
 735                              DONT_BOX_WINDOW);
 736       base = (tui_source_window_base *) tui_win_list[win_type];
 737     }
 738   else
 739     {
 740       base = (tui_source_window_base *) tui_win_list[win_type];
 741       tui_win_list[win_type]->reset (tui_win_list[win_type]->type,
 742                                      src_height,
 743                                      tui_win_list[win_type]->width,
 744                                      base->execution_info->width,
 745                                      data_height - 1);
 746       base->execution_info->reset (EXEC_INFO_WIN,
 747                                    src_height,
 748                                    3,
 749                                    0,
 750                                    data_height - 1);
 751       tui_make_visible (tui_win_list[win_type]);
 752       tui_make_visible (base->execution_info);
 753       locator->reset (LOCATOR_WIN,
 754                       2 /* 1 */ ,
 755                       tui_term_width (),
 756                       0,
 757                       total_height - 1);
 758     }
 759   base->m_has_locator = true;
 760   tui_make_visible (locator);
 761   tui_show_locator_content ();
 762   tui_add_to_source_windows
 763     ((tui_source_window_base *) tui_win_list[win_type]);
 764   tui_set_current_layout_to (new_layout);
 765 }
 766
 767 void
 768 tui_gen_win_info::reset (enum tui_win_type win_type,
 769                          int height_, int width_,
 770                          int origin_x_, int origin_y_)
 771 {
 772   int h = height_;
 773
 774   gdb_assert (type == win_type);
 775
 776   width = width_;
 777   height = h;
 778   if (h > 1)
 779     {
 780       viewport_height = h - 1;
 781       if (type != CMD_WIN)
 782         viewport_height--;
 783     }
 784   else
 785     viewport_height = 1;
 786   origin.x = origin_x_;
 787   origin.y = origin_y_;
 788 }
 789
 790 /* init_and_make_win().
 791  */
 792 static tui_gen_win_info *
 793 init_and_make_win (tui_gen_win_info *win_info,
 794                    enum tui_win_type win_type,
 795                    int height, int width,
 796                    int origin_x, int origin_y,
 797                    enum tui_box box_it)
 798 {
 799   if (win_info == NULL)
 800     {
 801       switch (win_type)
 802         {
 803         case SRC_WIN:
 804           win_info = new tui_source_window ();
 805           break;
 806
 807         case DISASSEM_WIN:
 808           win_info = new tui_disasm_window ();
 809           break;
 810
 811         case DATA_WIN:
 812           win_info = new tui_data_window ();
 813           break;
 814
 815         case CMD_WIN:
 816           win_info = new tui_cmd_window ();
 817           break;
 818
 819         case EXEC_INFO_WIN:
 820           win_info = new tui_exec_info_window ();
 821           break;
 822
 823         default:
 824           gdb_assert (tui_win_is_auxillary (win_type));
 825           win_info = new tui_gen_win_info (win_type);
 826           break;
 827         }
 828     }
 829
 830   win_info->reset (win_type, height, width, origin_x, origin_y);
 831   tui_make_window (win_info, box_it);
 832
 833   return win_info;
 834 }
 835
 836
 837 static struct tui_win_info *
 838 make_source_or_disasm_window (enum tui_win_type type,
 839                               int height, int origin_y)
 840 {
 841   struct tui_exec_info_window *execution_info
 842     = (tui_exec_info_window *) init_and_make_win (nullptr,
 843                                                   EXEC_INFO_WIN,
 844                                                   height,
 845                                                   3,
 846                                                   0,
 847                                                   origin_y,
 848                                                   DONT_BOX_WINDOW);
 849
 850   /* Now create the source window.  */
 851   struct tui_source_window_base *result
 852     = ((struct tui_source_window_base *)
 853        init_and_make_win (NULL,
 854                           type,
 855                           height,
 856                           tui_term_width () - execution_info->width,
 857                           execution_info->width,
 858                           origin_y,
 859                           BOX_WINDOW));
 860   result->execution_info = execution_info;
 861   return result;
 862 }
 863
 864
 865 /* Show the Source/Command or the Disassem layout.  */
 866 static void
 867 show_source_or_disasm_and_command (enum tui_layout_type layout_type)
 868 {
 869   if (tui_current_layout () != layout_type)
 870     {
 871       struct tui_win_info **win_info_ptr;
 872       int src_height, cmd_height;
 873       struct tui_locator_window *locator = tui_locator_win_info_ptr ();
 874       gdb_assert (locator != nullptr);
 875
 876       if (TUI_CMD_WIN != NULL)
 877         cmd_height = TUI_CMD_WIN->height;
 878       else
 879         cmd_height = tui_term_height () / 3;
 880       src_height = tui_term_height () - cmd_height;
 881
 882       if (layout_type == SRC_COMMAND)
 883         win_info_ptr = &tui_win_list[SRC_WIN];
 884       else
 885         win_info_ptr = &tui_win_list[DISASSEM_WIN];
 886
 887       tui_source_window_base *base;
 888       if ((*win_info_ptr) == NULL)
 889         {
 890           if (layout_type == SRC_COMMAND)
 891             *win_info_ptr = make_source_window (src_height - 1, 0);
 892           else
 893             *win_info_ptr = make_disasm_window (src_height - 1, 0);
 894           init_and_make_win (locator,
 895                              LOCATOR_WIN,
 896                              2 /* 1 */ ,
 897                              tui_term_width (),
 898                              0,
 899                              src_height - 1,
 900                              DONT_BOX_WINDOW);
 901           base = (tui_source_window_base *) *win_info_ptr;
 902         }
 903       else
 904         {
 905           base = (tui_source_window_base *) *win_info_ptr;
 906           locator->reset (LOCATOR_WIN,
 907                           2 /* 1 */ ,
 908                           tui_term_width (),
 909                           0,
 910                           src_height - 1);
 911           base->m_has_locator = true;
 912           (*win_info_ptr)->reset ((*win_info_ptr)->type,
 913                                   src_height - 1,
 914                                   (*win_info_ptr)->width,
 915                                   base->execution_info->width,
 916                                   0);
 917           base->execution_info->reset (EXEC_INFO_WIN,
 918                                        src_height - 1,
 919                                        3,
 920                                        0,
 921                                        0);
 922           tui_make_visible (*win_info_ptr);
 923           tui_make_visible (base->execution_info);
 924         }
 925
 926       base->m_has_locator = true;
 927       tui_make_visible (locator);
 928       tui_show_locator_content ();
 929       tui_show_source_content (*win_info_ptr);
 930
 931       if (TUI_CMD_WIN == NULL)
 932         {
 933           tui_win_list[CMD_WIN] = make_command_window (cmd_height,
 934                                                        src_height);
 935           TUI_CMD_WIN->refresh_window ();
 936         }
 937       else
 938         {
 939           TUI_CMD_WIN->reset (TUI_CMD_WIN->type,
 940                               TUI_CMD_WIN->height,
 941                               TUI_CMD_WIN->width,
 942                               TUI_CMD_WIN->origin.x,
 943                               TUI_CMD_WIN->origin.y);
 944           tui_make_visible (TUI_CMD_WIN);
 945         }
 946       tui_set_current_layout_to (layout_type);
 947     }
 948 }