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 (const 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 (const 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 /* Answer the previous layout to cycle to.  */
 503 static enum tui_layout_type
 504 next_layout (void)
 505 {
 506   int new_layout;
 507
 508   new_layout = tui_current_layout ();
 509   if (new_layout == UNDEFINED_LAYOUT)
 510     new_layout = SRC_COMMAND;
 511   else
 512     {
 513       new_layout++;
 514       if (new_layout == UNDEFINED_LAYOUT)
 515         new_layout = SRC_COMMAND;
 516     }
 517
 518   return (enum tui_layout_type) new_layout;
 519 }
 520
 521
 522 /* Answer the next layout to cycle to.  */
 523 static enum tui_layout_type
 524 prev_layout (void)
 525 {
 526   int new_layout;
 527
 528   new_layout = tui_current_layout ();
 529   if (new_layout == SRC_COMMAND)
 530     new_layout = DISASSEM_DATA_COMMAND;
 531   else
 532     {
 533       new_layout--;
 534       if (new_layout == UNDEFINED_LAYOUT)
 535         new_layout = DISASSEM_DATA_COMMAND;
 536     }
 537
 538   return (enum tui_layout_type) new_layout;
 539 }
 540
 541
 542
 543 static void
 544 make_command_window (struct tui_win_info **win_info_ptr,
 545                      int height, int origin_y)
 546 {
 547   *win_info_ptr
 548     = (struct tui_win_info *) init_and_make_win (*win_info_ptr,
 549                                                  CMD_WIN,
 550                                                  height,
 551                                                  tui_term_width (),
 552                                                  0,
 553                                                  origin_y,
 554                                                  DONT_BOX_WINDOW);
 555
 556   (*win_info_ptr)->can_highlight = FALSE;
 557 }
 558
 559
 560 /* make_source_window().
 561  */
 562 static void
 563 make_source_window (struct tui_win_info **win_info_ptr,
 564                     int height, int origin_y)
 565 {
 566   make_source_or_disasm_window (win_info_ptr, SRC_WIN, height, origin_y);
 567
 568   return;
 569 }                               /* make_source_window */
 570
 571
 572 /* make_disasm_window().
 573  */
 574 static void
 575 make_disasm_window (struct tui_win_info **win_info_ptr,
 576                     int height, int origin_y)
 577 {
 578   make_source_or_disasm_window (win_info_ptr, DISASSEM_WIN, height, origin_y);
 579
 580   return;
 581 }                               /* make_disasm_window */
 582
 583
 584 static void
 585 make_data_window (struct tui_win_info **win_info_ptr,
 586                   int height, int origin_y)
 587 {
 588   *win_info_ptr
 589     = (struct tui_win_info *) init_and_make_win (*win_info_ptr,
 590                                                  DATA_WIN,
 591                                                  height,
 592                                                  tui_term_width (),
 593                                                  0,
 594                                                  origin_y,
 595                                                  BOX_WINDOW);
 596 }
 597
 598
 599
 600 /* Show the Source/Command layout.  */
 601 static void
 602 show_source_command (void)
 603 {
 604   show_source_or_disasm_and_command (SRC_COMMAND);
 605 }
 606
 607
 608 /* Show the Dissassem/Command layout.  */
 609 static void
 610 show_disasm_command (void)
 611 {
 612   show_source_or_disasm_and_command (DISASSEM_COMMAND);
 613 }
 614
 615
 616 /* Show the Source/Disassem/Command layout.  */
 617 static void
 618 show_source_disasm_command (void)
 619 {
 620   if (tui_current_layout () != SRC_DISASSEM_COMMAND)
 621     {
 622       int cmd_height, src_height, asm_height;
 623
 624       if (TUI_CMD_WIN != NULL)
 625         cmd_height = TUI_CMD_WIN->generic.height;
 626       else
 627         cmd_height = tui_term_height () / 3;
 628
 629       src_height = (tui_term_height () - cmd_height) / 2;
 630       asm_height = tui_term_height () - (src_height + cmd_height);
 631
 632       if (TUI_SRC_WIN == NULL)
 633         make_source_window (&TUI_SRC_WIN, src_height, 0);
 634       else
 635         {
 636           init_gen_win_info (&TUI_SRC_WIN->generic,
 637                              TUI_SRC_WIN->generic.type,
 638                              src_height,
 639                              TUI_SRC_WIN->generic.width,
 640                              TUI_SRC_WIN->detail.source_info.execution_info->width,
 641                              0);
 642           TUI_SRC_WIN->can_highlight = TRUE;
 643           init_gen_win_info (TUI_SRC_WIN->detail.source_info.execution_info,
 644                              EXEC_INFO_WIN,
 645                              src_height,
 646                              3,
 647                              0,
 648                              0);
 649           tui_make_visible (&TUI_SRC_WIN->generic);
 650           tui_make_visible (TUI_SRC_WIN->detail.source_info.execution_info);
 651           TUI_SRC_WIN->detail.source_info.has_locator = FALSE;;
 652         }
 653       if (TUI_SRC_WIN != NULL)
 654         {
 655           struct tui_gen_win_info *locator = tui_locator_win_info_ptr ();
 656
 657           tui_show_source_content (TUI_SRC_WIN);
 658           if (TUI_DISASM_WIN == NULL)
 659             {
 660               make_disasm_window (&TUI_DISASM_WIN, asm_height, src_height - 1);
 661               locator
 662                 = ((struct tui_gen_win_info *)
 663                    init_and_make_win (locator,
 664                                       LOCATOR_WIN,
 665                                       2 /* 1 */ ,
 666                                       tui_term_width (),
 667                                       0,
 668                                       (src_height + asm_height) - 1,
 669                                       DONT_BOX_WINDOW));
 670             }
 671           else
 672             {
 673               init_gen_win_info (locator,
 674                                  LOCATOR_WIN,
 675                                  2 /* 1 */ ,
 676                                  tui_term_width (),
 677                                  0,
 678                                  (src_height + asm_height) - 1);
 679               TUI_DISASM_WIN->detail.source_info.has_locator = TRUE;
 680               init_gen_win_info (&TUI_DISASM_WIN->generic,
 681                                  TUI_DISASM_WIN->generic.type,
 682                                  asm_height,
 683                                  TUI_DISASM_WIN->generic.width,
 684                                  TUI_DISASM_WIN->detail.source_info.execution_info->width,
 685                                  src_height - 1);
 686               init_gen_win_info (TUI_DISASM_WIN->detail.source_info.execution_info,
 687                                  EXEC_INFO_WIN,
 688                                  asm_height,
 689                                  3,
 690                                  0,
 691                                  src_height - 1);
 692               TUI_DISASM_WIN->can_highlight = TRUE;
 693               tui_make_visible (&TUI_DISASM_WIN->generic);
 694               tui_make_visible (TUI_DISASM_WIN->detail.source_info.execution_info);
 695             }
 696           if (TUI_DISASM_WIN != NULL)
 697             {
 698               TUI_SRC_WIN->detail.source_info.has_locator = FALSE;
 699               TUI_DISASM_WIN->detail.source_info.has_locator = TRUE;
 700               tui_make_visible (locator);
 701               tui_show_locator_content ();
 702               tui_show_source_content (TUI_DISASM_WIN);
 703
 704               if (TUI_CMD_WIN == NULL)
 705                 make_command_window (&TUI_CMD_WIN,
 706                                      cmd_height,
 707                                      tui_term_height () - cmd_height);
 708               else
 709                 {
 710                   init_gen_win_info (&TUI_CMD_WIN->generic,
 711                                      TUI_CMD_WIN->generic.type,
 712                                      TUI_CMD_WIN->generic.height,
 713                                      TUI_CMD_WIN->generic.width,
 714                                      0,
 715                                      TUI_CMD_WIN->generic.origin.y);
 716                   TUI_CMD_WIN->can_highlight = FALSE;
 717                   tui_make_visible (&TUI_CMD_WIN->generic);
 718                 }
 719               if (TUI_CMD_WIN != NULL)
 720                 tui_refresh_win (&TUI_CMD_WIN->generic);
 721             }
 722         }
 723       tui_set_current_layout_to (SRC_DISASSEM_COMMAND);
 724     }
 725 }
 726
 727
 728 /* Show the Source/Data/Command or the Dissassembly/Data/Command
 729    layout.  */
 730 static void
 731 show_data (enum tui_layout_type new_layout)
 732 {
 733   int total_height = (tui_term_height () - TUI_CMD_WIN->generic.height);
 734   int src_height, data_height;
 735   enum tui_win_type win_type;
 736   struct tui_gen_win_info *locator = tui_locator_win_info_ptr ();
 737
 738
 739   data_height = total_height / 2;
 740   src_height = total_height - data_height;
 741   tui_make_all_invisible ();
 742   tui_make_invisible (locator);
 743   make_data_window (&TUI_DATA_WIN, data_height, 0);
 744   TUI_DATA_WIN->can_highlight = TRUE;
 745   if (new_layout == SRC_DATA_COMMAND)
 746     win_type = SRC_WIN;
 747   else
 748     win_type = DISASSEM_WIN;
 749   if (tui_win_list[win_type] == NULL)
 750     {
 751       if (win_type == SRC_WIN)
 752         make_source_window (&tui_win_list[win_type], src_height, data_height - 1);
 753       else
 754         make_disasm_window (&tui_win_list[win_type], src_height, data_height - 1);
 755       locator
 756         = ((struct tui_gen_win_info *)
 757            init_and_make_win (locator,
 758                               LOCATOR_WIN,
 759                               2 /* 1 */ ,
 760                               tui_term_width (),
 761                               0,
 762                               total_height - 1,
 763                               DONT_BOX_WINDOW));
 764     }
 765   else
 766     {
 767       init_gen_win_info (&tui_win_list[win_type]->generic,
 768                          tui_win_list[win_type]->generic.type,
 769                          src_height,
 770                          tui_win_list[win_type]->generic.width,
 771                          tui_win_list[win_type]->detail.source_info.execution_info->width,
 772                          data_height - 1);
 773       init_gen_win_info (tui_win_list[win_type]->detail.source_info.execution_info,
 774                          EXEC_INFO_WIN,
 775                          src_height,
 776                          3,
 777                          0,
 778                          data_height - 1);
 779       tui_make_visible (&tui_win_list[win_type]->generic);
 780       tui_make_visible (tui_win_list[win_type]->detail.source_info.execution_info);
 781       init_gen_win_info (locator,
 782                          LOCATOR_WIN,
 783                          2 /* 1 */ ,
 784                          tui_term_width (),
 785                          0,
 786                          total_height - 1);
 787     }
 788   tui_win_list[win_type]->detail.source_info.has_locator = TRUE;
 789   tui_make_visible (locator);
 790   tui_show_locator_content ();
 791   tui_add_to_source_windows (tui_win_list[win_type]);
 792   tui_set_current_layout_to (new_layout);
 793 }
 794
 795 /* init_gen_win_info().
 796  */
 797 static void
 798 init_gen_win_info (struct tui_gen_win_info *win_info,
 799                    enum tui_win_type type,
 800                    int height, int width,
 801                    int origin_x, int origin_y)
 802 {
 803   int h = height;
 804
 805   win_info->type = type;
 806   win_info->width = width;
 807   win_info->height = h;
 808   if (h > 1)
 809     {
 810       win_info->viewport_height = h - 1;
 811       if (win_info->type != CMD_WIN)
 812         win_info->viewport_height--;
 813     }
 814   else
 815     win_info->viewport_height = 1;
 816   win_info->origin.x = origin_x;
 817   win_info->origin.y = origin_y;
 818
 819   return;
 820 }                               /* init_gen_win_info */
 821
 822 /* init_and_make_win().
 823  */
 824 static void *
 825 init_and_make_win (void *opaque_win_info,
 826                    enum tui_win_type win_type,
 827                    int height, int width,
 828                    int origin_x, int origin_y,
 829                    int box_it)
 830 {
 831   struct tui_gen_win_info *generic;
 832
 833   if (opaque_win_info == NULL)
 834     {
 835       if (tui_win_is_auxillary (win_type))
 836         opaque_win_info = (void *) tui_alloc_generic_win_info ();
 837       else
 838         opaque_win_info = (void *) tui_alloc_win_info (win_type);
 839     }
 840   if (tui_win_is_auxillary (win_type))
 841     generic = (struct tui_gen_win_info *) opaque_win_info;
 842   else
 843     generic = &((struct tui_win_info *) opaque_win_info)->generic;
 844
 845   if (opaque_win_info != NULL)
 846     {
 847       init_gen_win_info (generic, win_type, height, width, origin_x, origin_y);
 848       if (!tui_win_is_auxillary (win_type))
 849         {
 850           if (generic->type == CMD_WIN)
 851             ((struct tui_win_info *) opaque_win_info)->can_highlight = FALSE;
 852           else
 853             ((struct tui_win_info *) opaque_win_info)->can_highlight = TRUE;
 854         }
 855       tui_make_window (generic, box_it);
 856     }
 857   return opaque_win_info;
 858 }
 859
 860
 861 static void
 862 make_source_or_disasm_window (struct tui_win_info **win_info_ptr,
 863                               enum tui_win_type type,
 864                               int height, int origin_y)
 865 {
 866   struct tui_gen_win_info *execution_info = NULL;
 867
 868   /* Create the exeuction info window.  */
 869   if (type == SRC_WIN)
 870     execution_info = tui_source_exec_info_win_ptr ();
 871   else
 872     execution_info = tui_disassem_exec_info_win_ptr ();
 873   execution_info
 874     = ((struct tui_gen_win_info *)
 875        init_and_make_win (execution_info,
 876                           EXEC_INFO_WIN,
 877                           height,
 878                           3,
 879                           0,
 880                           origin_y,
 881                           DONT_BOX_WINDOW));
 882
 883   /* Now create the source window.  */
 884   *win_info_ptr
 885     = ((struct tui_win_info *)
 886        init_and_make_win (*win_info_ptr,
 887                           type,
 888                           height,
 889                           tui_term_width () - execution_info->width,
 890                           execution_info->width,
 891                           origin_y,
 892                           BOX_WINDOW));
 893
 894   (*win_info_ptr)->detail.source_info.execution_info = execution_info;
 895 }
 896
 897
 898 /* Show the Source/Command or the Disassem layout.  */
 899 static void
 900 show_source_or_disasm_and_command (enum tui_layout_type layout_type)
 901 {
 902   if (tui_current_layout () != layout_type)
 903     {
 904       struct tui_win_info **win_info_ptr;
 905       int src_height, cmd_height;
 906       struct tui_gen_win_info *locator = tui_locator_win_info_ptr ();
 907
 908       if (TUI_CMD_WIN != NULL)
 909         cmd_height = TUI_CMD_WIN->generic.height;
 910       else
 911         cmd_height = tui_term_height () / 3;
 912       src_height = tui_term_height () - cmd_height;
 913
 914       if (layout_type == SRC_COMMAND)
 915         win_info_ptr = &TUI_SRC_WIN;
 916       else
 917         win_info_ptr = &TUI_DISASM_WIN;
 918
 919       if ((*win_info_ptr) == NULL)
 920         {
 921           if (layout_type == SRC_COMMAND)
 922             make_source_window (win_info_ptr, src_height - 1, 0);
 923           else
 924             make_disasm_window (win_info_ptr, src_height - 1, 0);
 925           locator
 926             = ((struct tui_gen_win_info *)
 927                init_and_make_win (locator,
 928                                   LOCATOR_WIN,
 929                                   2 /* 1 */ ,
 930                                   tui_term_width (),
 931                                   0,
 932                                   src_height - 1,
 933                                   DONT_BOX_WINDOW));
 934         }
 935       else
 936         {
 937           init_gen_win_info (locator,
 938                              LOCATOR_WIN,
 939                              2 /* 1 */ ,
 940                              tui_term_width (),
 941                              0,
 942                              src_height - 1);
 943           (*win_info_ptr)->detail.source_info.has_locator = TRUE;
 944           init_gen_win_info (&(*win_info_ptr)->generic,
 945                              (*win_info_ptr)->generic.type,
 946                              src_height - 1,
 947                              (*win_info_ptr)->generic.width,
 948                              (*win_info_ptr)->detail.source_info.execution_info->width,
 949                              0);
 950           init_gen_win_info ((*win_info_ptr)->detail.source_info.execution_info,
 951                              EXEC_INFO_WIN,
 952                              src_height - 1,
 953                              3,
 954                              0,
 955                              0);
 956           (*win_info_ptr)->can_highlight = TRUE;
 957           tui_make_visible (&(*win_info_ptr)->generic);
 958           tui_make_visible ((*win_info_ptr)->detail.source_info.execution_info);
 959         }
 960       if ((*win_info_ptr) != NULL)
 961         {
 962           (*win_info_ptr)->detail.source_info.has_locator = TRUE;
 963           tui_make_visible (locator);
 964           tui_show_locator_content ();
 965           tui_show_source_content (*win_info_ptr);
 966
 967           if (TUI_CMD_WIN == NULL)
 968             {
 969               make_command_window (&TUI_CMD_WIN, cmd_height, src_height);
 970               tui_refresh_win (&TUI_CMD_WIN->generic);
 971             }
 972           else
 973             {
 974               init_gen_win_info (&TUI_CMD_WIN->generic,
 975                                  TUI_CMD_WIN->generic.type,
 976                                  TUI_CMD_WIN->generic.height,
 977                                  TUI_CMD_WIN->generic.width,
 978                                  TUI_CMD_WIN->generic.origin.x,
 979                                  TUI_CMD_WIN->generic.origin.y);
 980               TUI_CMD_WIN->can_highlight = FALSE;
 981               tui_make_visible (&TUI_CMD_WIN->generic);
 982             }
 983         }
 984       tui_set_current_layout_to (layout_type);
 985     }
 986 }