gdb/tui/tui-layout.c

   1 /* TUI layout window management.
   2
   3    Copyright (C) 1998-2017 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 init_gen_win_info (struct tui_gen_win_info *,
  47                                enum tui_win_type,
  48                                int, int, int, int);
  49 static void *init_and_make_win (void *, enum tui_win_type,
  50                                 int, int, int, int, int);
  51 static void show_source_or_disasm_and_command (enum tui_layout_type);
  52 static void make_source_or_disasm_window (struct tui_win_info **,
  53                                           enum tui_win_type,
  54                                           int, int);
  55 static void make_command_window (struct tui_win_info **, int, int);
  56 static void make_source_window (struct tui_win_info **, int, int);
  57 static void make_disasm_window (struct tui_win_info **, int, int);
  58 static void make_data_window (struct tui_win_info **, int, int);
  59 static void show_source_command (void);
  60 static void show_disasm_command (void);
  61 static void show_source_disasm_command (void);
  62 static void show_data (enum tui_layout_type);
  63 static enum tui_layout_type next_layout (void);
  64 static enum tui_layout_type prev_layout (void);
  65 static void tui_layout_command (char *, int);
  66 static void extract_display_start_addr (struct gdbarch **, CORE_ADDR *);
  67
  68
  69 /***************************************
  70 ** DEFINITIONS
  71 ***************************************/
  72
  73 #define LAYOUT_USAGE     "Usage: layout prev | next | <layout_name> \n"
  74
  75 /* Show the screen layout defined.  */
  76 static void
  77 show_layout (enum tui_layout_type layout)
  78 {
  79   enum tui_layout_type cur_layout = tui_current_layout ();
  80
  81   if (layout != cur_layout)
  82     {
  83       /* Since the new layout may cause changes in window size, we
  84          should free the content and reallocate on next display of
  85          source/asm.  */
  86       tui_free_all_source_wins_content ();
  87       tui_clear_source_windows ();
  88       if (layout == SRC_DATA_COMMAND
  89           || layout == DISASSEM_DATA_COMMAND)
  90         {
  91           show_data (layout);
  92           tui_refresh_all (tui_win_list);
  93         }
  94       else
  95         {
  96           /* First make the current layout be invisible.  */
  97           tui_make_all_invisible ();
  98           tui_make_invisible (tui_locator_win_info_ptr ());
  99
 100           switch (layout)
 101             {
 102               /* Now show the new layout.  */
 103             case SRC_COMMAND:
 104               show_source_command ();
 105               tui_add_to_source_windows (TUI_SRC_WIN);
 106               break;
 107             case DISASSEM_COMMAND:
 108               show_disasm_command ();
 109               tui_add_to_source_windows (TUI_DISASM_WIN);
 110               break;
 111             case SRC_DISASSEM_COMMAND:
 112               show_source_disasm_command ();
 113               tui_add_to_source_windows (TUI_SRC_WIN);
 114               tui_add_to_source_windows (TUI_DISASM_WIN);
 115               break;
 116             default:
 117               break;
 118             }
 119         }
 120     }
 121 }
 122
 123
 124 /* Function to set the layout to SRC_COMMAND, DISASSEM_COMMAND,
 125    SRC_DISASSEM_COMMAND, SRC_DATA_COMMAND, or DISASSEM_DATA_COMMAND.  */
 126 enum tui_status
 127 tui_set_layout (enum tui_layout_type layout_type)
 128 {
 129   enum tui_status status = TUI_SUCCESS;
 130
 131   if (layout_type != UNDEFINED_LAYOUT)
 132     {
 133       enum tui_layout_type cur_layout = tui_current_layout (),
 134         new_layout = UNDEFINED_LAYOUT;
 135       int regs_populate = FALSE;
 136       struct gdbarch *gdbarch;
 137       CORE_ADDR addr;
 138       struct tui_win_info *win_with_focus = tui_win_with_focus ();
 139       struct tui_layout_def *layout_def = tui_layout_def ();
 140
 141       extract_display_start_addr (&gdbarch, &addr);
 142
 143       new_layout = layout_type;
 144
 145       regs_populate = (new_layout == SRC_DATA_COMMAND
 146                        || new_layout == DISASSEM_DATA_COMMAND);
 147       if (new_layout != cur_layout)
 148         {
 149           show_layout (new_layout);
 150
 151           /* Now determine where focus should be.  */
 152           if (win_with_focus != TUI_CMD_WIN)
 153             {
 154               switch (new_layout)
 155                 {
 156                 case SRC_COMMAND:
 157                   tui_set_win_focus_to (TUI_SRC_WIN);
 158                   layout_def->display_mode = SRC_WIN;
 159                   layout_def->split = FALSE;
 160                   break;
 161                 case DISASSEM_COMMAND:
 162                   /* The previous layout was not showing code.
 163                      This can happen if there is no source
 164                      available:
 165
 166                      1. if the source file is in another dir OR
 167                      2. if target was compiled without -g
 168                      We still want to show the assembly though!  */
 169
 170                   tui_get_begin_asm_address (&gdbarch, &addr);
 171                   tui_set_win_focus_to (TUI_DISASM_WIN);
 172                   layout_def->display_mode = DISASSEM_WIN;
 173                   layout_def->split = FALSE;
 174                   break;
 175                 case SRC_DISASSEM_COMMAND:
 176                   /* The previous layout was not showing code.
 177                      This can happen if there is no source
 178                      available:
 179
 180                      1. if the source file is in another dir OR
 181                      2. if target was compiled without -g
 182                      We still want to show the assembly though!  */
 183
 184                   tui_get_begin_asm_address (&gdbarch, &addr);
 185                   if (win_with_focus == TUI_SRC_WIN)
 186                     tui_set_win_focus_to (TUI_SRC_WIN);
 187                   else
 188                     tui_set_win_focus_to (TUI_DISASM_WIN);
 189                   layout_def->split = TRUE;
 190                   break;
 191                 case SRC_DATA_COMMAND:
 192                   if (win_with_focus != TUI_DATA_WIN)
 193                     tui_set_win_focus_to (TUI_SRC_WIN);
 194                   else
 195                     tui_set_win_focus_to (TUI_DATA_WIN);
 196                   layout_def->display_mode = SRC_WIN;
 197                   layout_def->split = FALSE;
 198                   break;
 199                 case DISASSEM_DATA_COMMAND:
 200                   /* The previous layout was not showing code.
 201                      This can happen if there is no source
 202                      available:
 203
 204                      1. if the source file is in another dir OR
 205                      2. if target was compiled without -g
 206                      We still want to show the assembly though!  */
 207
 208                   tui_get_begin_asm_address (&gdbarch, &addr);
 209                   if (win_with_focus != TUI_DATA_WIN)
 210                     tui_set_win_focus_to (TUI_DISASM_WIN);
 211                   else
 212                     tui_set_win_focus_to (TUI_DATA_WIN);
 213                   layout_def->display_mode = DISASSEM_WIN;
 214                   layout_def->split = FALSE;
 215                   break;
 216                 default:
 217                   break;
 218                 }
 219             }
 220           /*
 221            * Now update the window content.
 222            */
 223           if (!regs_populate
 224               && (new_layout == SRC_DATA_COMMAND
 225                   || new_layout == DISASSEM_DATA_COMMAND))
 226             tui_display_all_data ();
 227
 228           tui_update_source_windows_with_addr (gdbarch, addr);
 229
 230           if (regs_populate)
 231             {
 232               struct reggroup *group =
 233                 TUI_DATA_WIN->detail.data_display_info.current_group;
 234               tui_show_registers (group);
 235             }
 236         }
 237     }
 238   else
 239     status = TUI_FAILURE;
 240
 241   return status;
 242 }
 243
 244 /* Add the specified window to the layout in a logical way.  This
 245    means setting up the most logical layout given the window to be
 246    added.  */
 247 void
 248 tui_add_win_to_layout (enum tui_win_type type)
 249 {
 250   enum tui_layout_type cur_layout = tui_current_layout ();
 251
 252   switch (type)
 253     {
 254     case SRC_WIN:
 255       if (cur_layout != SRC_COMMAND
 256           && cur_layout != SRC_DISASSEM_COMMAND
 257           && cur_layout != SRC_DATA_COMMAND)
 258         {
 259           tui_clear_source_windows_detail ();
 260           if (cur_layout == DISASSEM_DATA_COMMAND)
 261             show_layout (SRC_DATA_COMMAND);
 262           else
 263             show_layout (SRC_COMMAND);
 264         }
 265       break;
 266     case DISASSEM_WIN:
 267       if (cur_layout != DISASSEM_COMMAND
 268           && cur_layout != SRC_DISASSEM_COMMAND
 269           && cur_layout != DISASSEM_DATA_COMMAND)
 270         {
 271           tui_clear_source_windows_detail ();
 272           if (cur_layout == SRC_DATA_COMMAND)
 273             show_layout (DISASSEM_DATA_COMMAND);
 274           else
 275             show_layout (DISASSEM_COMMAND);
 276         }
 277       break;
 278     case DATA_WIN:
 279       if (cur_layout != SRC_DATA_COMMAND
 280           && cur_layout != DISASSEM_DATA_COMMAND)
 281         {
 282           if (cur_layout == DISASSEM_COMMAND)
 283             show_layout (DISASSEM_DATA_COMMAND);
 284           else
 285             show_layout (SRC_DATA_COMMAND);
 286         }
 287       break;
 288     default:
 289       break;
 290     }
 291 }
 292
 293
 294 /* Answer the height of a window.  If it hasn't been created yet,
 295    answer what the height of a window would be based upon its type and
 296    the layout.  */
 297 int
 298 tui_default_win_height (enum tui_win_type type,
 299                         enum tui_layout_type layout)
 300 {
 301   int h;
 302
 303   if (tui_win_list[type] != (struct tui_win_info *) NULL)
 304     h = tui_win_list[type]->generic.height;
 305   else
 306     {
 307       switch (layout)
 308         {
 309         case SRC_COMMAND:
 310         case DISASSEM_COMMAND:
 311           if (TUI_CMD_WIN == NULL)
 312             h = tui_term_height () / 2;
 313           else
 314             h = tui_term_height () - TUI_CMD_WIN->generic.height;
 315           break;
 316         case SRC_DISASSEM_COMMAND:
 317         case SRC_DATA_COMMAND:
 318         case DISASSEM_DATA_COMMAND:
 319           if (TUI_CMD_WIN == NULL)
 320             h = tui_term_height () / 3;
 321           else
 322             h = (tui_term_height () - TUI_CMD_WIN->generic.height) / 2;
 323           break;
 324         default:
 325           h = 0;
 326           break;
 327         }
 328     }
 329
 330   return h;
 331 }
 332
 333
 334 /* Answer the height of a window.  If it hasn't been created yet,
 335    answer what the height of a window would be based upon its type and
 336    the layout.  */
 337 int
 338 tui_default_win_viewport_height (enum tui_win_type type,
 339                                  enum tui_layout_type layout)
 340 {
 341   int h;
 342
 343   h = tui_default_win_height (type, layout);
 344
 345   if (tui_win_list[type] == TUI_CMD_WIN)
 346     h -= 1;
 347   else
 348     h -= 2;
 349
 350   return h;
 351 }
 352
 353 /* Complete possible layout names.  TEXT is the complete text entered so
 354    far, WORD is the word currently being completed.  */
 355
 356 static void
 357 layout_completer (struct cmd_list_element *ignore,
 358                   completion_tracker &tracker,
 359                   const char *text, const char *word)
 360 {
 361   static const char *layout_names [] =
 362     { "src", "asm", "split", "regs", "next", "prev", NULL };
 363
 364   complete_on_enum (tracker, layout_names, text, word);
 365 }
 366
 367 /* Function to initialize gdb commands, for tui window layout
 368    manipulation.  */
 369
 370 void
 371 _initialize_tui_layout (void)
 372 {
 373   struct cmd_list_element *cmd;
 374
 375   cmd = add_com ("layout", class_tui, tui_layout_command, _("\
 376 Change the layout of windows.\n\
 377 Usage: layout prev | next | <layout_name> \n\
 378 Layout names are:\n\
 379    src   : Displays source and command windows.\n\
 380    asm   : Displays disassembly and command windows.\n\
 381    split : Displays source, disassembly and command windows.\n\
 382    regs  : Displays register window. If existing layout\n\
 383            is source/command or assembly/command, the \n\
 384            register window is displayed. If the\n\
 385            source/assembly/command (split) is displayed, \n\
 386            the register window is displayed with \n\
 387            the window that has current logical focus.\n"));
 388   set_cmd_completer (cmd, layout_completer);
 389 }
 390
 391
 392 /*************************
 393 ** STATIC LOCAL FUNCTIONS
 394 **************************/
 395
 396
 397 /* Function to set the layout to SRC, ASM, SPLIT, NEXT, PREV, DATA, or
 398    REGS. */
 399 enum tui_status
 400 tui_set_layout_by_name (const char *layout_name)
 401 {
 402   enum tui_status status = TUI_SUCCESS;
 403
 404   if (layout_name != (char *) NULL)
 405     {
 406       int i;
 407       enum tui_layout_type new_layout = UNDEFINED_LAYOUT;
 408       enum tui_layout_type cur_layout = tui_current_layout ();
 409
 410       std::string copy = layout_name;
 411       for (i = 0; i < copy.size (); i++)
 412         copy[i] = toupper (copy[i]);
 413       const char *buf_ptr = copy.c_str ();
 414
 415       /* First check for ambiguous input.  */
 416       if (strlen (buf_ptr) <= 1 && *buf_ptr == 'S')
 417         {
 418           warning (_("Ambiguous command input."));
 419           status = TUI_FAILURE;
 420         }
 421       else
 422         {
 423           if (subset_compare (buf_ptr, "SRC"))
 424             new_layout = SRC_COMMAND;
 425           else if (subset_compare (buf_ptr, "ASM"))
 426             new_layout = DISASSEM_COMMAND;
 427           else if (subset_compare (buf_ptr, "SPLIT"))
 428             new_layout = SRC_DISASSEM_COMMAND;
 429           else if (subset_compare (buf_ptr, "REGS"))
 430             {
 431               if (cur_layout == SRC_COMMAND
 432                   || cur_layout == SRC_DATA_COMMAND)
 433                 new_layout = SRC_DATA_COMMAND;
 434               else
 435                 new_layout = DISASSEM_DATA_COMMAND;
 436             }
 437           else if (subset_compare (buf_ptr, "NEXT"))
 438             new_layout = next_layout ();
 439           else if (subset_compare (buf_ptr, "PREV"))
 440             new_layout = prev_layout ();
 441           else
 442             status = TUI_FAILURE;
 443
 444           if (status == TUI_SUCCESS)
 445             {
 446               /* Make sure the curses mode is enabled.  */
 447               tui_enable ();
 448               tui_set_layout (new_layout);
 449             }
 450         }
 451     }
 452   else
 453     status = TUI_FAILURE;
 454
 455   return status;
 456 }
 457
 458
 459 static void
 460 extract_display_start_addr (struct gdbarch **gdbarch_p, CORE_ADDR *addr_p)
 461 {
 462   enum tui_layout_type cur_layout = tui_current_layout ();
 463   struct gdbarch *gdbarch = get_current_arch ();
 464   CORE_ADDR addr;
 465   CORE_ADDR pc;
 466   struct symtab_and_line cursal = get_current_source_symtab_and_line ();
 467
 468   switch (cur_layout)
 469     {
 470     case SRC_COMMAND:
 471     case SRC_DATA_COMMAND:
 472       gdbarch = TUI_SRC_WIN->detail.source_info.gdbarch;
 473       find_line_pc (cursal.symtab,
 474                     TUI_SRC_WIN->detail.source_info.start_line_or_addr.u.line_no,
 475                     &pc);
 476       addr = pc;
 477       break;
 478     case DISASSEM_COMMAND:
 479     case SRC_DISASSEM_COMMAND:
 480     case DISASSEM_DATA_COMMAND:
 481       gdbarch = TUI_DISASM_WIN->detail.source_info.gdbarch;
 482       addr = TUI_DISASM_WIN->detail.source_info.start_line_or_addr.u.addr;
 483       break;
 484     default:
 485       addr = 0;
 486       break;
 487     }
 488
 489   *gdbarch_p = gdbarch;
 490   *addr_p = addr;
 491 }
 492
 493
 494 static void
 495 tui_layout_command (char *arg, int from_tty)
 496 {
 497   /* Switch to the selected layout.  */
 498   if (tui_set_layout_by_name (arg) != TUI_SUCCESS)
 499     warning (_("Invalid layout specified.\n%s"), LAYOUT_USAGE);
 500
 501 }
 502
 503 /* Answer the previous layout to cycle to.  */
 504 static enum tui_layout_type
 505 next_layout (void)
 506 {
 507   int new_layout;
 508
 509   new_layout = tui_current_layout ();
 510   if (new_layout == UNDEFINED_LAYOUT)
 511     new_layout = SRC_COMMAND;
 512   else
 513     {
 514       new_layout++;
 515       if (new_layout == UNDEFINED_LAYOUT)
 516         new_layout = SRC_COMMAND;
 517     }
 518
 519   return (enum tui_layout_type) new_layout;
 520 }
 521
 522
 523 /* Answer the next layout to cycle to.  */
 524 static enum tui_layout_type
 525 prev_layout (void)
 526 {
 527   int new_layout;
 528
 529   new_layout = tui_current_layout ();
 530   if (new_layout == SRC_COMMAND)
 531     new_layout = DISASSEM_DATA_COMMAND;
 532   else
 533     {
 534       new_layout--;
 535       if (new_layout == UNDEFINED_LAYOUT)
 536         new_layout = DISASSEM_DATA_COMMAND;
 537     }
 538
 539   return (enum tui_layout_type) new_layout;
 540 }
 541
 542
 543
 544 static void
 545 make_command_window (struct tui_win_info **win_info_ptr,
 546                      int height, int origin_y)
 547 {
 548   *win_info_ptr
 549     = (struct tui_win_info *) init_and_make_win (*win_info_ptr,
 550                                                  CMD_WIN,
 551                                                  height,
 552                                                  tui_term_width (),
 553                                                  0,
 554                                                  origin_y,
 555                                                  DONT_BOX_WINDOW);
 556
 557   (*win_info_ptr)->can_highlight = FALSE;
 558 }
 559
 560
 561 /* make_source_window().
 562  */
 563 static void
 564 make_source_window (struct tui_win_info **win_info_ptr,
 565                     int height, int origin_y)
 566 {
 567   make_source_or_disasm_window (win_info_ptr, SRC_WIN, height, origin_y);
 568
 569   return;
 570 }                               /* make_source_window */
 571
 572
 573 /* make_disasm_window().
 574  */
 575 static void
 576 make_disasm_window (struct tui_win_info **win_info_ptr,
 577                     int height, int origin_y)
 578 {
 579   make_source_or_disasm_window (win_info_ptr, DISASSEM_WIN, height, origin_y);
 580
 581   return;
 582 }                               /* make_disasm_window */
 583
 584
 585 static void
 586 make_data_window (struct tui_win_info **win_info_ptr,
 587                   int height, int origin_y)
 588 {
 589   *win_info_ptr
 590     = (struct tui_win_info *) init_and_make_win (*win_info_ptr,
 591                                                  DATA_WIN,
 592                                                  height,
 593                                                  tui_term_width (),
 594                                                  0,
 595                                                  origin_y,
 596                                                  BOX_WINDOW);
 597 }
 598
 599
 600
 601 /* Show the Source/Command layout.  */
 602 static void
 603 show_source_command (void)
 604 {
 605   show_source_or_disasm_and_command (SRC_COMMAND);
 606 }
 607
 608
 609 /* Show the Dissassem/Command layout.  */
 610 static void
 611 show_disasm_command (void)
 612 {
 613   show_source_or_disasm_and_command (DISASSEM_COMMAND);
 614 }
 615
 616
 617 /* Show the Source/Disassem/Command layout.  */
 618 static void
 619 show_source_disasm_command (void)
 620 {
 621   if (tui_current_layout () != SRC_DISASSEM_COMMAND)
 622     {
 623       int cmd_height, src_height, asm_height;
 624
 625       if (TUI_CMD_WIN != NULL)
 626         cmd_height = TUI_CMD_WIN->generic.height;
 627       else
 628         cmd_height = tui_term_height () / 3;
 629
 630       src_height = (tui_term_height () - cmd_height) / 2;
 631       asm_height = tui_term_height () - (src_height + cmd_height);
 632
 633       if (TUI_SRC_WIN == NULL)
 634         make_source_window (&TUI_SRC_WIN, src_height, 0);
 635       else
 636         {
 637           init_gen_win_info (&TUI_SRC_WIN->generic,
 638                              TUI_SRC_WIN->generic.type,
 639                              src_height,
 640                              TUI_SRC_WIN->generic.width,
 641                              TUI_SRC_WIN->detail.source_info.execution_info->width,
 642                              0);
 643           TUI_SRC_WIN->can_highlight = TRUE;
 644           init_gen_win_info (TUI_SRC_WIN->detail.source_info.execution_info,
 645                              EXEC_INFO_WIN,
 646                              src_height,
 647                              3,
 648                              0,
 649                              0);
 650           tui_make_visible (&TUI_SRC_WIN->generic);
 651           tui_make_visible (TUI_SRC_WIN->detail.source_info.execution_info);
 652           TUI_SRC_WIN->detail.source_info.has_locator = FALSE;;
 653         }
 654       if (TUI_SRC_WIN != NULL)
 655         {
 656           struct tui_gen_win_info *locator = tui_locator_win_info_ptr ();
 657
 658           tui_show_source_content (TUI_SRC_WIN);
 659           if (TUI_DISASM_WIN == NULL)
 660             {
 661               make_disasm_window (&TUI_DISASM_WIN, asm_height, src_height - 1);
 662               locator
 663                 = ((struct tui_gen_win_info *)
 664                    init_and_make_win (locator,
 665                                       LOCATOR_WIN,
 666                                       2 /* 1 */ ,
 667                                       tui_term_width (),
 668                                       0,
 669                                       (src_height + asm_height) - 1,
 670                                       DONT_BOX_WINDOW));
 671             }
 672           else
 673             {
 674               init_gen_win_info (locator,
 675                                  LOCATOR_WIN,
 676                                  2 /* 1 */ ,
 677                                  tui_term_width (),
 678                                  0,
 679                                  (src_height + asm_height) - 1);
 680               TUI_DISASM_WIN->detail.source_info.has_locator = TRUE;
 681               init_gen_win_info (&TUI_DISASM_WIN->generic,
 682                                  TUI_DISASM_WIN->generic.type,
 683                                  asm_height,
 684                                  TUI_DISASM_WIN->generic.width,
 685                                  TUI_DISASM_WIN->detail.source_info.execution_info->width,
 686                                  src_height - 1);
 687               init_gen_win_info (TUI_DISASM_WIN->detail.source_info.execution_info,
 688                                  EXEC_INFO_WIN,
 689                                  asm_height,
 690                                  3,
 691                                  0,
 692                                  src_height - 1);
 693               TUI_DISASM_WIN->can_highlight = TRUE;
 694               tui_make_visible (&TUI_DISASM_WIN->generic);
 695               tui_make_visible (TUI_DISASM_WIN->detail.source_info.execution_info);
 696             }
 697           if (TUI_DISASM_WIN != NULL)
 698             {
 699               TUI_SRC_WIN->detail.source_info.has_locator = FALSE;
 700               TUI_DISASM_WIN->detail.source_info.has_locator = TRUE;
 701               tui_make_visible (locator);
 702               tui_show_locator_content ();
 703               tui_show_source_content (TUI_DISASM_WIN);
 704
 705               if (TUI_CMD_WIN == NULL)
 706                 make_command_window (&TUI_CMD_WIN,
 707                                      cmd_height,
 708                                      tui_term_height () - cmd_height);
 709               else
 710                 {
 711                   init_gen_win_info (&TUI_CMD_WIN->generic,
 712                                      TUI_CMD_WIN->generic.type,
 713                                      TUI_CMD_WIN->generic.height,
 714                                      TUI_CMD_WIN->generic.width,
 715                                      0,
 716                                      TUI_CMD_WIN->generic.origin.y);
 717                   TUI_CMD_WIN->can_highlight = FALSE;
 718                   tui_make_visible (&TUI_CMD_WIN->generic);
 719                 }
 720               if (TUI_CMD_WIN != NULL)
 721                 tui_refresh_win (&TUI_CMD_WIN->generic);
 722             }
 723         }
 724       tui_set_current_layout_to (SRC_DISASSEM_COMMAND);
 725     }
 726 }
 727
 728
 729 /* Show the Source/Data/Command or the Dissassembly/Data/Command
 730    layout.  */
 731 static void
 732 show_data (enum tui_layout_type new_layout)
 733 {
 734   int total_height = (tui_term_height () - TUI_CMD_WIN->generic.height);
 735   int src_height, data_height;
 736   enum tui_win_type win_type;
 737   struct tui_gen_win_info *locator = tui_locator_win_info_ptr ();
 738
 739
 740   data_height = total_height / 2;
 741   src_height = total_height - data_height;
 742   tui_make_all_invisible ();
 743   tui_make_invisible (locator);
 744   make_data_window (&TUI_DATA_WIN, data_height, 0);
 745   TUI_DATA_WIN->can_highlight = TRUE;
 746   if (new_layout == SRC_DATA_COMMAND)
 747     win_type = SRC_WIN;
 748   else
 749     win_type = DISASSEM_WIN;
 750   if (tui_win_list[win_type] == NULL)
 751     {
 752       if (win_type == SRC_WIN)
 753         make_source_window (&tui_win_list[win_type], src_height, data_height - 1);
 754       else
 755         make_disasm_window (&tui_win_list[win_type], src_height, data_height - 1);
 756       locator
 757         = ((struct tui_gen_win_info *)
 758            init_and_make_win (locator,
 759                               LOCATOR_WIN,
 760                               2 /* 1 */ ,
 761                               tui_term_width (),
 762                               0,
 763                               total_height - 1,
 764                               DONT_BOX_WINDOW));
 765     }
 766   else
 767     {
 768       init_gen_win_info (&tui_win_list[win_type]->generic,
 769                          tui_win_list[win_type]->generic.type,
 770                          src_height,
 771                          tui_win_list[win_type]->generic.width,
 772                          tui_win_list[win_type]->detail.source_info.execution_info->width,
 773                          data_height - 1);
 774       init_gen_win_info (tui_win_list[win_type]->detail.source_info.execution_info,
 775                          EXEC_INFO_WIN,
 776                          src_height,
 777                          3,
 778                          0,
 779                          data_height - 1);
 780       tui_make_visible (&tui_win_list[win_type]->generic);
 781       tui_make_visible (tui_win_list[win_type]->detail.source_info.execution_info);
 782       init_gen_win_info (locator,
 783                          LOCATOR_WIN,
 784                          2 /* 1 */ ,
 785                          tui_term_width (),
 786                          0,
 787                          total_height - 1);
 788     }
 789   tui_win_list[win_type]->detail.source_info.has_locator = TRUE;
 790   tui_make_visible (locator);
 791   tui_show_locator_content ();
 792   tui_add_to_source_windows (tui_win_list[win_type]);
 793   tui_set_current_layout_to (new_layout);
 794 }
 795
 796 /* init_gen_win_info().
 797  */
 798 static void
 799 init_gen_win_info (struct tui_gen_win_info *win_info,
 800                    enum tui_win_type type,
 801                    int height, int width,
 802                    int origin_x, int origin_y)
 803 {
 804   int h = height;
 805
 806   win_info->type = type;
 807   win_info->width = width;
 808   win_info->height = h;
 809   if (h > 1)
 810     {
 811       win_info->viewport_height = h - 1;
 812       if (win_info->type != CMD_WIN)
 813         win_info->viewport_height--;
 814     }
 815   else
 816     win_info->viewport_height = 1;
 817   win_info->origin.x = origin_x;
 818   win_info->origin.y = origin_y;
 819
 820   return;
 821 }                               /* init_gen_win_info */
 822
 823 /* init_and_make_win().
 824  */
 825 static void *
 826 init_and_make_win (void *opaque_win_info,
 827                    enum tui_win_type win_type,
 828                    int height, int width,
 829                    int origin_x, int origin_y,
 830                    int box_it)
 831 {
 832   struct tui_gen_win_info *generic;
 833
 834   if (opaque_win_info == NULL)
 835     {
 836       if (tui_win_is_auxillary (win_type))
 837         opaque_win_info = (void *) tui_alloc_generic_win_info ();
 838       else
 839         opaque_win_info = (void *) tui_alloc_win_info (win_type);
 840     }
 841   if (tui_win_is_auxillary (win_type))
 842     generic = (struct tui_gen_win_info *) opaque_win_info;
 843   else
 844     generic = &((struct tui_win_info *) opaque_win_info)->generic;
 845
 846   if (opaque_win_info != NULL)
 847     {
 848       init_gen_win_info (generic, win_type, height, width, origin_x, origin_y);
 849       if (!tui_win_is_auxillary (win_type))
 850         {
 851           if (generic->type == CMD_WIN)
 852             ((struct tui_win_info *) opaque_win_info)->can_highlight = FALSE;
 853           else
 854             ((struct tui_win_info *) opaque_win_info)->can_highlight = TRUE;
 855         }
 856       tui_make_window (generic, box_it);
 857     }
 858   return opaque_win_info;
 859 }
 860
 861
 862 static void
 863 make_source_or_disasm_window (struct tui_win_info **win_info_ptr,
 864                               enum tui_win_type type,
 865                               int height, int origin_y)
 866 {
 867   struct tui_gen_win_info *execution_info = NULL;
 868
 869   /* Create the exeuction info window.  */
 870   if (type == SRC_WIN)
 871     execution_info = tui_source_exec_info_win_ptr ();
 872   else
 873     execution_info = tui_disassem_exec_info_win_ptr ();
 874   execution_info
 875     = ((struct tui_gen_win_info *)
 876        init_and_make_win (execution_info,
 877                           EXEC_INFO_WIN,
 878                           height,
 879                           3,
 880                           0,
 881                           origin_y,
 882                           DONT_BOX_WINDOW));
 883
 884   /* Now create the source window.  */
 885   *win_info_ptr
 886     = ((struct tui_win_info *)
 887        init_and_make_win (*win_info_ptr,
 888                           type,
 889                           height,
 890                           tui_term_width () - execution_info->width,
 891                           execution_info->width,
 892                           origin_y,
 893                           BOX_WINDOW));
 894
 895   (*win_info_ptr)->detail.source_info.execution_info = execution_info;
 896 }
 897
 898
 899 /* Show the Source/Command or the Disassem layout.  */
 900 static void
 901 show_source_or_disasm_and_command (enum tui_layout_type layout_type)
 902 {
 903   if (tui_current_layout () != layout_type)
 904     {
 905       struct tui_win_info **win_info_ptr;
 906       int src_height, cmd_height;
 907       struct tui_gen_win_info *locator = tui_locator_win_info_ptr ();
 908
 909       if (TUI_CMD_WIN != NULL)
 910         cmd_height = TUI_CMD_WIN->generic.height;
 911       else
 912         cmd_height = tui_term_height () / 3;
 913       src_height = tui_term_height () - cmd_height;
 914
 915       if (layout_type == SRC_COMMAND)
 916         win_info_ptr = &TUI_SRC_WIN;
 917       else
 918         win_info_ptr = &TUI_DISASM_WIN;
 919
 920       if ((*win_info_ptr) == NULL)
 921         {
 922           if (layout_type == SRC_COMMAND)
 923             make_source_window (win_info_ptr, src_height - 1, 0);
 924           else
 925             make_disasm_window (win_info_ptr, src_height - 1, 0);
 926           locator
 927             = ((struct tui_gen_win_info *)
 928                init_and_make_win (locator,
 929                                   LOCATOR_WIN,
 930                                   2 /* 1 */ ,
 931                                   tui_term_width (),
 932                                   0,
 933                                   src_height - 1,
 934                                   DONT_BOX_WINDOW));
 935         }
 936       else
 937         {
 938           init_gen_win_info (locator,
 939                              LOCATOR_WIN,
 940                              2 /* 1 */ ,
 941                              tui_term_width (),
 942                              0,
 943                              src_height - 1);
 944           (*win_info_ptr)->detail.source_info.has_locator = TRUE;
 945           init_gen_win_info (&(*win_info_ptr)->generic,
 946                              (*win_info_ptr)->generic.type,
 947                              src_height - 1,
 948                              (*win_info_ptr)->generic.width,
 949                              (*win_info_ptr)->detail.source_info.execution_info->width,
 950                              0);
 951           init_gen_win_info ((*win_info_ptr)->detail.source_info.execution_info,
 952                              EXEC_INFO_WIN,
 953                              src_height - 1,
 954                              3,
 955                              0,
 956                              0);
 957           (*win_info_ptr)->can_highlight = TRUE;
 958           tui_make_visible (&(*win_info_ptr)->generic);
 959           tui_make_visible ((*win_info_ptr)->detail.source_info.execution_info);
 960         }
 961       if ((*win_info_ptr) != NULL)
 962         {
 963           (*win_info_ptr)->detail.source_info.has_locator = TRUE;
 964           tui_make_visible (locator);
 965           tui_show_locator_content ();
 966           tui_show_source_content (*win_info_ptr);
 967
 968           if (TUI_CMD_WIN == NULL)
 969             {
 970               make_command_window (&TUI_CMD_WIN, cmd_height, src_height);
 971               tui_refresh_win (&TUI_CMD_WIN->generic);
 972             }
 973           else
 974             {
 975               init_gen_win_info (&TUI_CMD_WIN->generic,
 976                                  TUI_CMD_WIN->generic.type,
 977                                  TUI_CMD_WIN->generic.height,
 978                                  TUI_CMD_WIN->generic.width,
 979                                  TUI_CMD_WIN->generic.origin.x,
 980                                  TUI_CMD_WIN->generic.origin.y);
 981               TUI_CMD_WIN->can_highlight = FALSE;
 982               tui_make_visible (&TUI_CMD_WIN->generic);
 983             }
 984         }
 985       tui_set_current_layout_to (layout_type);
 986     }
 987 }