Change tui_show_source_content to be a method
[deliverable/binutils-gdb.git] / gdb / tui / tui-layout.c
index 5995af0d2b021e7700ef013232f42d655a096962..3683835954d0edce2e9dc919c98e8ee508af250e 100644 (file)
@@ -1,7 +1,6 @@
 /* TUI layout window management.
 
-   Copyright (C) 1998, 1999, 2000, 2001, 2002, 2003, 2004, 2007
-   Free Software Foundation, Inc.
+   Copyright (C) 1998-2019 Free Software Foundation, Inc.
 
    Contributed by Hewlett-Packard Company.
 
@@ -9,7 +8,7 @@
 
    This program is free software; you can redistribute it and/or modify
    it under the terms of the GNU General Public License as published by
-   the Free Software Foundation; either version 2 of the License, or
+   the Free Software Foundation; either version 3 of the License, or
    (at your option) any later version.
 
    This program is distributed in the hope that it will be useful,
    GNU General Public License for more details.
 
    You should have received a copy of the GNU General Public License
-   along with this program; if not, write to the Free Software
-   Foundation, Inc., 51 Franklin Street, Fifth Floor,
-   Boston, MA 02110-1301, USA.  */
+   along with this program.  If not, see <http://www.gnu.org/licenses/>.  */
 
 #include "defs.h"
+#include "arch-utils.h"
 #include "command.h"
 #include "symtab.h"
 #include "frame.h"
 #include <ctype.h>
 
 #include "tui/tui.h"
+#include "tui/tui-command.h"
 #include "tui/tui-data.h"
-#include "tui/tui-windata.h"
 #include "tui/tui-wingeneral.h"
 #include "tui/tui-stack.h"
 #include "tui/tui-regs.h"
 #include "tui/tui-win.h"
 #include "tui/tui-winsource.h"
 #include "tui/tui-disasm.h"
-
-#include "gdb_string.h"
+#include "tui/tui-layout.h"
+#include "tui/tui-source.h"
 #include "gdb_curses.h"
 
 /*******************************
 ** Static Local Decls
 ********************************/
 static void show_layout (enum tui_layout_type);
-static void init_gen_win_info (struct tui_gen_win_info *, enum tui_win_type, int, int, int, int);
-static void *init_and_make_win (void *, enum tui_win_type, int, int, int, int, int);
 static void show_source_or_disasm_and_command (enum tui_layout_type);
-static void make_source_or_disasm_window (struct tui_win_info * *, enum tui_win_type, int, int);
-static void make_command_window (struct tui_win_info * *, int, int);
-static void make_source_window (struct tui_win_info * *, int, int);
-static void make_disasm_window (struct tui_win_info * *, int, int);
-static void make_data_window (struct tui_win_info * *, int, int);
 static void show_source_command (void);
 static void show_disasm_command (void);
 static void show_source_disasm_command (void);
 static void show_data (enum tui_layout_type);
 static enum tui_layout_type next_layout (void);
 static enum tui_layout_type prev_layout (void);
-static void tui_layout_command (char *, int);
-static void tui_toggle_layout_command (char *, int);
-static void tui_toggle_split_layout_command (char *, int);
-static CORE_ADDR extract_display_start_addr (void);
-static void tui_handle_xdb_layout (struct tui_layout_def *);
+static void tui_layout_command (const char *, int);
+static void extract_display_start_addr (struct gdbarch **, CORE_ADDR *);
+
 
+static enum tui_layout_type current_layout = UNDEFINED_LAYOUT;
+
+/* Accessor for the current layout.  */
+enum tui_layout_type
+tui_current_layout (void)
+{
+  return current_layout;
+}
 
 /***************************************
 ** DEFINITIONS
 ***************************************/
 
-#define LAYOUT_USAGE     "Usage: layout prev | next | <layout_name> \n"
-
 /* Show the screen layout defined.  */
 static void
 show_layout (enum tui_layout_type layout)
@@ -81,178 +76,131 @@ show_layout (enum tui_layout_type layout)
 
   if (layout != cur_layout)
     {
-      /*
-         ** Since the new layout may cause changes in window size, we
-         ** should free the content and reallocate on next display of
-         ** source/asm
-       */
-      tui_free_all_source_wins_content ();
+      /* Since the new layout may cause changes in window size, we
+         should free the content and reallocate on next display of
+         source/asm.  */
       tui_clear_source_windows ();
-      if (layout == SRC_DATA_COMMAND || layout == DISASSEM_DATA_COMMAND)
+      /* First make the current layout be invisible.  */
+      tui_make_all_invisible ();
+      tui_locator_win_info_ptr ()->make_visible (false);
+      switch (layout)
        {
+       case SRC_DATA_COMMAND:
+       case DISASSEM_DATA_COMMAND:
          show_data (layout);
-         tui_refresh_all (tui_win_list);
+         tui_refresh_all ();
+         break;
+         /* Now show the new layout.  */
+       case SRC_COMMAND:
+         show_source_command ();
+         tui_add_to_source_windows (TUI_SRC_WIN);
+         break;
+       case DISASSEM_COMMAND:
+         show_disasm_command ();
+         tui_add_to_source_windows (TUI_DISASM_WIN);
+         break;
+       case SRC_DISASSEM_COMMAND:
+         show_source_disasm_command ();
+         tui_add_to_source_windows (TUI_SRC_WIN);
+         tui_add_to_source_windows (TUI_DISASM_WIN);
+         break;
+       default:
+         break;
        }
-      else
-       {
-         /* First make the current layout be invisible */
-         tui_make_all_invisible ();
-         tui_make_invisible (tui_locator_win_info_ptr ());
 
-         switch (layout)
-           {
-             /* Now show the new layout */
-           case SRC_COMMAND:
-             show_source_command ();
-             tui_add_to_source_windows (TUI_SRC_WIN);
-             break;
-           case DISASSEM_COMMAND:
-             show_disasm_command ();
-             tui_add_to_source_windows (TUI_DISASM_WIN);
-             break;
-           case SRC_DISASSEM_COMMAND:
-             show_source_disasm_command ();
-             tui_add_to_source_windows (TUI_SRC_WIN);
-             tui_add_to_source_windows (TUI_DISASM_WIN);
-             break;
-           default:
-             break;
-           }
-       }
+      tui_delete_invisible_windows ();
     }
 }
 
 
 /* Function to set the layout to SRC_COMMAND, DISASSEM_COMMAND,
-   SRC_DISASSEM_COMMAND, SRC_DATA_COMMAND, or DISASSEM_DATA_COMMAND.
-   If the layout is SRC_DATA_COMMAND, DISASSEM_DATA_COMMAND, or
-   UNDEFINED_LAYOUT, then the data window is populated according to
-   regs_display_type.  */
-enum tui_status
-tui_set_layout (enum tui_layout_type layout_type,
-               enum tui_register_display_type regs_display_type)
+   SRC_DISASSEM_COMMAND, SRC_DATA_COMMAND, or DISASSEM_DATA_COMMAND.  */
+void
+tui_set_layout (enum tui_layout_type layout_type)
 {
-  enum tui_status status = TUI_SUCCESS;
+  gdb_assert (layout_type != UNDEFINED_LAYOUT);
 
-  if (layout_type != UNDEFINED_LAYOUT || regs_display_type != TUI_UNDEFINED_REGS)
-    {
-      enum tui_layout_type cur_layout = tui_current_layout (), new_layout = UNDEFINED_LAYOUT;
-      int regs_populate = FALSE;
-      CORE_ADDR addr = extract_display_start_addr ();
-      struct tui_win_info * win_with_focus = tui_win_with_focus ();
-      struct tui_layout_def * layout_def = tui_layout_def ();
+  enum tui_layout_type cur_layout = tui_current_layout ();
+  struct gdbarch *gdbarch;
+  CORE_ADDR addr;
+  struct tui_win_info *win_with_focus = tui_win_with_focus ();
 
+  extract_display_start_addr (&gdbarch, &addr);
 
-      if (layout_type == UNDEFINED_LAYOUT &&
-         regs_display_type != TUI_UNDEFINED_REGS)
-       {
-         if (cur_layout == SRC_DISASSEM_COMMAND)
-           new_layout = DISASSEM_DATA_COMMAND;
-         else if (cur_layout == SRC_COMMAND || cur_layout == SRC_DATA_COMMAND)
-           new_layout = SRC_DATA_COMMAND;
-         else if (cur_layout == DISASSEM_COMMAND ||
-                  cur_layout == DISASSEM_DATA_COMMAND)
-           new_layout = DISASSEM_DATA_COMMAND;
-       }
-      else
-       new_layout = layout_type;
+  enum tui_layout_type new_layout = layout_type;
 
-      regs_populate = (new_layout == SRC_DATA_COMMAND ||
-                     new_layout == DISASSEM_DATA_COMMAND ||
-                     regs_display_type != TUI_UNDEFINED_REGS);
-      if (new_layout != cur_layout || regs_display_type != TUI_UNDEFINED_REGS)
+  if (new_layout != cur_layout)
+    {
+      show_layout (new_layout);
+
+      /* Now determine where focus should be.  */
+      if (win_with_focus != TUI_CMD_WIN)
        {
-         if (new_layout != cur_layout)
-           {
-             show_layout (new_layout);
-             /*
-                ** Now determine where focus should be
-              */
-             if (win_with_focus != TUI_CMD_WIN)
-               {
-                 switch (new_layout)
-                   {
-                   case SRC_COMMAND:
-                     tui_set_win_focus_to (TUI_SRC_WIN);
-                     layout_def->display_mode = SRC_WIN;
-                     layout_def->split = FALSE;
-                     break;
-                   case DISASSEM_COMMAND:
-                     /* the previous layout was not showing
-                        ** code. this can happen if there is no
-                        ** source available:
-                        ** 1. if the source file is in another dir OR
-                        ** 2. if target was compiled without -g
-                        ** We still want to show the assembly though!
-                      */
-                     addr = tui_get_begin_asm_address ();
-                     tui_set_win_focus_to (TUI_DISASM_WIN);
-                     layout_def->display_mode = DISASSEM_WIN;
-                     layout_def->split = FALSE;
-                     break;
-                   case SRC_DISASSEM_COMMAND:
-                     /* the previous layout was not showing
-                        ** code. this can happen if there is no
-                        ** source available:
-                        ** 1. if the source file is in another dir OR
-                        ** 2. if target was compiled without -g
-                        ** We still want to show the assembly though!
-                      */
-                     addr = tui_get_begin_asm_address ();
-                     if (win_with_focus == TUI_SRC_WIN)
-                       tui_set_win_focus_to (TUI_SRC_WIN);
-                     else
-                       tui_set_win_focus_to (TUI_DISASM_WIN);
-                     layout_def->split = TRUE;
-                     break;
-                   case SRC_DATA_COMMAND:
-                     if (win_with_focus != TUI_DATA_WIN)
-                       tui_set_win_focus_to (TUI_SRC_WIN);
-                     else
-                       tui_set_win_focus_to (TUI_DATA_WIN);
-                     layout_def->display_mode = SRC_WIN;
-                     layout_def->split = FALSE;
-                     break;
-                   case DISASSEM_DATA_COMMAND:
-                     /* the previous layout was not showing
-                        ** code. this can happen if there is no
-                        ** source available:
-                        ** 1. if the source file is in another dir OR
-                        ** 2. if target was compiled without -g
-                        ** We still want to show the assembly though!
-                      */
-                     addr = tui_get_begin_asm_address ();
-                     if (win_with_focus != TUI_DATA_WIN)
-                       tui_set_win_focus_to (TUI_DISASM_WIN);
-                     else
-                       tui_set_win_focus_to (TUI_DATA_WIN);
-                     layout_def->display_mode = DISASSEM_WIN;
-                     layout_def->split = FALSE;
-                     break;
-                   default:
-                     break;
-                   }
-               }
-             /*
-              * Now update the window content.
-              */
-             if (!regs_populate &&
-                 (new_layout == SRC_DATA_COMMAND ||
-                  new_layout == DISASSEM_DATA_COMMAND))
-               tui_display_all_data ();
-
-             tui_update_source_windows_with_addr (addr);
-           }
-         if (regs_populate)
+         switch (new_layout)
            {
-              tui_show_registers (TUI_DATA_WIN->detail.data_display_info.current_group);
+           case SRC_COMMAND:
+             tui_set_win_focus_to (TUI_SRC_WIN);
+             break;
+           case DISASSEM_COMMAND:
+             /* The previous layout was not showing code.
+                This can happen if there is no source
+                available:
+
+                1. if the source file is in another dir OR
+                2. if target was compiled without -g
+                We still want to show the assembly though!  */
+
+             tui_get_begin_asm_address (&gdbarch, &addr);
+             tui_set_win_focus_to (TUI_DISASM_WIN);
+             break;
+           case SRC_DISASSEM_COMMAND:
+             /* The previous layout was not showing code.
+                This can happen if there is no source
+                available:
+
+                1. if the source file is in another dir OR
+                2. if target was compiled without -g
+                We still want to show the assembly though!  */
+
+             tui_get_begin_asm_address (&gdbarch, &addr);
+             if (win_with_focus == TUI_SRC_WIN)
+               tui_set_win_focus_to (TUI_SRC_WIN);
+             else
+               tui_set_win_focus_to (TUI_DISASM_WIN);
+             break;
+           case SRC_DATA_COMMAND:
+             if (win_with_focus != TUI_DATA_WIN)
+               tui_set_win_focus_to (TUI_SRC_WIN);
+             else
+               tui_set_win_focus_to (TUI_DATA_WIN);
+             break;
+           case DISASSEM_DATA_COMMAND:
+             /* The previous layout was not showing code.
+                This can happen if there is no source
+                available:
+
+                1. if the source file is in another dir OR
+                2. if target was compiled without -g
+                We still want to show the assembly though!  */
+
+             tui_get_begin_asm_address (&gdbarch, &addr);
+             if (win_with_focus != TUI_DATA_WIN)
+               tui_set_win_focus_to (TUI_DISASM_WIN);
+             else
+               tui_set_win_focus_to (TUI_DATA_WIN);
+             break;
+           default:
+             break;
            }
        }
+      /*
+       * Now update the window content.
+       */
+      tui_update_source_windows_with_addr (gdbarch, addr);
+      if (new_layout == SRC_DATA_COMMAND
+         || new_layout == DISASSEM_DATA_COMMAND)
+       tui_show_registers (TUI_DATA_WIN->current_group);
     }
-  else
-    status = TUI_FAILURE;
-
-  return status;
 }
 
 /* Add the specified window to the layout in a logical way.  This
@@ -266,9 +214,9 @@ tui_add_win_to_layout (enum tui_win_type type)
   switch (type)
     {
     case SRC_WIN:
-      if (cur_layout != SRC_COMMAND &&
-         cur_layout != SRC_DISASSEM_COMMAND &&
-         cur_layout != SRC_DATA_COMMAND)
+      if (cur_layout != SRC_COMMAND
+         && cur_layout != SRC_DISASSEM_COMMAND
+         && cur_layout != SRC_DATA_COMMAND)
        {
          tui_clear_source_windows_detail ();
          if (cur_layout == DISASSEM_DATA_COMMAND)
@@ -278,9 +226,9 @@ tui_add_win_to_layout (enum tui_win_type type)
        }
       break;
     case DISASSEM_WIN:
-      if (cur_layout != DISASSEM_COMMAND &&
-         cur_layout != SRC_DISASSEM_COMMAND &&
-         cur_layout != DISASSEM_DATA_COMMAND)
+      if (cur_layout != DISASSEM_COMMAND
+         && cur_layout != SRC_DISASSEM_COMMAND
+         && cur_layout != DISASSEM_DATA_COMMAND)
        {
          tui_clear_source_windows_detail ();
          if (cur_layout == SRC_DATA_COMMAND)
@@ -290,8 +238,8 @@ tui_add_win_to_layout (enum tui_win_type type)
        }
       break;
     case DATA_WIN:
-      if (cur_layout != SRC_DATA_COMMAND &&
-         cur_layout != DISASSEM_DATA_COMMAND)
+      if (cur_layout != SRC_DATA_COMMAND
+         && cur_layout != DISASSEM_DATA_COMMAND)
        {
          if (cur_layout == DISASSEM_COMMAND)
            show_layout (DISASSEM_DATA_COMMAND);
@@ -308,13 +256,14 @@ tui_add_win_to_layout (enum tui_win_type type)
 /* Answer the height of a window.  If it hasn't been created yet,
    answer what the height of a window would be based upon its type and
    the layout.  */
-int
-tui_default_win_height (enum tui_win_type type, enum tui_layout_type layout)
+static int
+tui_default_win_height (enum tui_win_type type, 
+                       enum tui_layout_type layout)
 {
   int h;
 
-  if (tui_win_list[type] != (struct tui_win_info *) NULL)
-    h = tui_win_list[type]->generic.height;
+  if (tui_win_list[type] != NULL)
+    h = tui_win_list[type]->height;
   else
     {
       switch (layout)
@@ -324,7 +273,7 @@ tui_default_win_height (enum tui_win_type type, enum tui_layout_type layout)
          if (TUI_CMD_WIN == NULL)
            h = tui_term_height () / 2;
          else
-           h = tui_term_height () - TUI_CMD_WIN->generic.height;
+           h = tui_term_height () - TUI_CMD_WIN->height;
          break;
        case SRC_DISASSEM_COMMAND:
        case SRC_DATA_COMMAND:
@@ -332,7 +281,7 @@ tui_default_win_height (enum tui_win_type type, enum tui_layout_type layout)
          if (TUI_CMD_WIN == NULL)
            h = tui_term_height () / 3;
          else
-           h = (tui_term_height () - TUI_CMD_WIN->generic.height) / 2;
+           h = (tui_term_height () - TUI_CMD_WIN->height) / 2;
          break;
        default:
          h = 0;
@@ -363,15 +312,31 @@ tui_default_win_viewport_height (enum tui_win_type type,
   return h;
 }
 
+/* Complete possible layout names.  TEXT is the complete text entered so
+   far, WORD is the word currently being completed.  */
+
+static void
+layout_completer (struct cmd_list_element *ignore,
+                 completion_tracker &tracker,
+                 const char *text, const char *word)
+{
+  static const char *layout_names [] =
+    { "src", "asm", "split", "regs", "next", "prev", NULL };
+
+  complete_on_enum (tracker, layout_names, text, word);
+}
 
 /* Function to initialize gdb commands, for tui window layout
    manipulation.  */
+
 void
 _initialize_tui_layout (void)
 {
-  add_com ("layout", class_tui, tui_layout_command, _("\
+  struct cmd_list_element *cmd;
+
+  cmd = add_com ("layout", class_tui, tui_layout_command, _("\
 Change the layout of windows.\n\
-Usage: layout prev | next | <layout_name> \n\
+Usage: layout prev | next | LAYOUT-NAME\n\
 Layout names are:\n\
    src   : Displays source and command windows.\n\
    asm   : Displays disassembly and command windows.\n\
@@ -381,15 +346,8 @@ Layout names are:\n\
            register window is displayed. If the\n\
            source/assembly/command (split) is displayed, \n\
            the register window is displayed with \n\
-           the window that has current logical focus.\n"));
-  if (xdb_commands)
-    {
-      add_com ("td", class_tui, tui_toggle_layout_command, _("\
-Toggle between Source/Command and Disassembly/Command layouts.\n"));
-      add_com ("ts", class_tui, tui_toggle_split_layout_command, _("\
-Toggle between Source/Command or Disassembly/Command and \n\
-Source/Disassembly/Command layouts.\n"));
-    }
+           the window that has current logical focus."));
+  set_cmd_completer (cmd, layout_completer);
 }
 
 
@@ -398,115 +356,59 @@ Source/Disassembly/Command layouts.\n"));
 **************************/
 
 
-/* Function to set the layout to SRC, ASM, SPLIT, NEXT, PREV, DATA,
-   REGS, $REGS, $GREGS, $FREGS, $SREGS.  */
-enum tui_status
-tui_set_layout_for_display_command (const char *layout_name)
+/* Function to set the layout to SRC, ASM, SPLIT, NEXT, PREV, DATA, or
+   REGS. */
+static void
+tui_layout_command (const char *layout_name, int from_tty)
 {
-  enum tui_status status = TUI_SUCCESS;
+  int i;
+  enum tui_layout_type new_layout = UNDEFINED_LAYOUT;
+  enum tui_layout_type cur_layout = tui_current_layout ();
+
+  if (layout_name == NULL)
+    error (_("Usage: layout prev | next | LAYOUT-NAME"));
 
-  if (layout_name != (char *) NULL)
+  std::string copy = layout_name;
+  for (i = 0; i < copy.size (); i++)
+    copy[i] = toupper (copy[i]);
+  const char *buf_ptr = copy.c_str ();
+
+  /* First check for ambiguous input.  */
+  if (strlen (buf_ptr) <= 1 && *buf_ptr == 'S')
+    error (_("Ambiguous command input."));
+
+  if (subset_compare (buf_ptr, "SRC"))
+    new_layout = SRC_COMMAND;
+  else if (subset_compare (buf_ptr, "ASM"))
+    new_layout = DISASSEM_COMMAND;
+  else if (subset_compare (buf_ptr, "SPLIT"))
+    new_layout = SRC_DISASSEM_COMMAND;
+  else if (subset_compare (buf_ptr, "REGS"))
     {
-      int i;
-      char *buf_ptr;
-      enum tui_layout_type new_layout = UNDEFINED_LAYOUT;
-      enum tui_register_display_type dpy_type = TUI_UNDEFINED_REGS;
-      enum tui_layout_type cur_layout = tui_current_layout ();
-
-      buf_ptr = (char *) xstrdup (layout_name);
-      for (i = 0; (i < strlen (layout_name)); i++)
-       buf_ptr[i] = toupper (buf_ptr[i]);
-
-      /* First check for ambiguous input */
-      if (strlen (buf_ptr) <= 1 && (*buf_ptr == 'S' || *buf_ptr == '$'))
-       {
-         warning (_("Ambiguous command input."));
-         status = TUI_FAILURE;
-       }
+      if (cur_layout == SRC_COMMAND
+         || cur_layout == SRC_DATA_COMMAND)
+       new_layout = SRC_DATA_COMMAND;
       else
-       {
-         if (subset_compare (buf_ptr, "SRC"))
-           new_layout = SRC_COMMAND;
-         else if (subset_compare (buf_ptr, "ASM"))
-           new_layout = DISASSEM_COMMAND;
-         else if (subset_compare (buf_ptr, "SPLIT"))
-           new_layout = SRC_DISASSEM_COMMAND;
-         else if (subset_compare (buf_ptr, "REGS") ||
-                  subset_compare (buf_ptr, TUI_GENERAL_SPECIAL_REGS_NAME) ||
-                  subset_compare (buf_ptr, TUI_GENERAL_REGS_NAME) ||
-                  subset_compare (buf_ptr, TUI_FLOAT_REGS_NAME) ||
-                  subset_compare (buf_ptr, TUI_SPECIAL_REGS_NAME))
-           {
-             if (cur_layout == SRC_COMMAND || cur_layout == SRC_DATA_COMMAND)
-               new_layout = SRC_DATA_COMMAND;
-             else
-               new_layout = DISASSEM_DATA_COMMAND;
-
-/* could ifdef out the following code. when compile with -z, there are null 
-   pointer references that cause a core dump if 'layout regs' is the first 
-   layout command issued by the user. HP has asked us to hook up this code 
-   - edie epstein
- */
-             if (subset_compare (buf_ptr, TUI_FLOAT_REGS_NAME))
-               {
-                 if (TUI_DATA_WIN->detail.data_display_info.regs_display_type !=
-                     TUI_SFLOAT_REGS &&
-                     TUI_DATA_WIN->detail.data_display_info.regs_display_type !=
-                     TUI_DFLOAT_REGS)
-                   dpy_type = TUI_SFLOAT_REGS;
-                 else
-                   dpy_type =
-                     TUI_DATA_WIN->detail.data_display_info.regs_display_type;
-               }
-             else if (subset_compare (buf_ptr,
-                                     TUI_GENERAL_SPECIAL_REGS_NAME))
-               dpy_type = TUI_GENERAL_AND_SPECIAL_REGS;
-             else if (subset_compare (buf_ptr, TUI_GENERAL_REGS_NAME))
-               dpy_type = TUI_GENERAL_REGS;
-             else if (subset_compare (buf_ptr, TUI_SPECIAL_REGS_NAME))
-               dpy_type = TUI_SPECIAL_REGS;
-             else if (TUI_DATA_WIN)
-               {
-                 if (TUI_DATA_WIN->detail.data_display_info.regs_display_type !=
-                     TUI_UNDEFINED_REGS)
-                   dpy_type =
-                     TUI_DATA_WIN->detail.data_display_info.regs_display_type;
-                 else
-                   dpy_type = TUI_GENERAL_REGS;
-               }
-
-/* end of potential ifdef 
- */
-
-/* if ifdefed out code above, then assume that the user wishes to display the 
-   general purpose registers 
- */
-
-/*              dpy_type = TUI_GENERAL_REGS; 
- */
-           }
-         else if (subset_compare (buf_ptr, "NEXT"))
-           new_layout = next_layout ();
-         else if (subset_compare (buf_ptr, "PREV"))
-           new_layout = prev_layout ();
-         else
-           status = TUI_FAILURE;
-
-         tui_set_layout (new_layout, dpy_type);
-       }
-      xfree (buf_ptr);
+       new_layout = DISASSEM_DATA_COMMAND;
     }
+  else if (subset_compare (buf_ptr, "NEXT"))
+    new_layout = next_layout ();
+  else if (subset_compare (buf_ptr, "PREV"))
+    new_layout = prev_layout ();
   else
-    status = TUI_FAILURE;
+    error (_("Unrecognized layout: %s"), layout_name);
 
-  return status;
+  /* Make sure the curses mode is enabled.  */
+  tui_enable ();
+  tui_set_layout (new_layout);
 }
 
 
-static CORE_ADDR
-extract_display_start_addr (void)
+static void
+extract_display_start_addr (struct gdbarch **gdbarch_p, CORE_ADDR *addr_p)
 {
   enum tui_layout_type cur_layout = tui_current_layout ();
+  struct gdbarch *gdbarch = get_current_arch ();
   CORE_ADDR addr;
   CORE_ADDR pc;
   struct symtab_and_line cursal = get_current_source_symtab_and_line ();
@@ -515,89 +417,33 @@ extract_display_start_addr (void)
     {
     case SRC_COMMAND:
     case SRC_DATA_COMMAND:
+      gdbarch = TUI_SRC_WIN->gdbarch;
       find_line_pc (cursal.symtab,
-                   TUI_SRC_WIN->detail.source_info.start_line_or_addr.u.line_no,
+                   TUI_SRC_WIN->start_line_or_addr.u.line_no,
                    &pc);
       addr = pc;
       break;
     case DISASSEM_COMMAND:
     case SRC_DISASSEM_COMMAND:
     case DISASSEM_DATA_COMMAND:
-      addr = TUI_DISASM_WIN->detail.source_info.start_line_or_addr.u.addr;
+      gdbarch = TUI_DISASM_WIN->gdbarch;
+      addr = TUI_DISASM_WIN->start_line_or_addr.u.addr;
       break;
     default:
       addr = 0;
       break;
     }
 
-  return addr;
-}
-
-
-static void
-tui_handle_xdb_layout (struct tui_layout_def * layout_def)
-{
-  if (layout_def->split)
-    {
-      tui_set_layout (SRC_DISASSEM_COMMAND, TUI_UNDEFINED_REGS);
-      tui_set_win_focus_to (tui_win_list[layout_def->display_mode]);
-    }
-  else
-    {
-      if (layout_def->display_mode == SRC_WIN)
-       tui_set_layout (SRC_COMMAND, TUI_UNDEFINED_REGS);
-      else
-       tui_set_layout (DISASSEM_DATA_COMMAND, layout_def->regs_display_type);
-    }
-}
-
-
-static void
-tui_toggle_layout_command (char *arg, int from_tty)
-{
-  struct tui_layout_def * layout_def = tui_layout_def ();
-
-  /* Make sure the curses mode is enabled.  */
-  tui_enable ();
-  if (layout_def->display_mode == SRC_WIN)
-    layout_def->display_mode = DISASSEM_WIN;
-  else
-    layout_def->display_mode = SRC_WIN;
-
-  if (!layout_def->split)
-    tui_handle_xdb_layout (layout_def);
+  *gdbarch_p = gdbarch;
+  *addr_p = addr;
 }
 
 
-static void
-tui_toggle_split_layout_command (char *arg, int from_tty)
-{
-  struct tui_layout_def * layout_def = tui_layout_def ();
-
-  /* Make sure the curses mode is enabled.  */
-  tui_enable ();
-  layout_def->split = (!layout_def->split);
-  tui_handle_xdb_layout (layout_def);
-}
-
-
-static void
-tui_layout_command (char *arg, int from_tty)
-{
-  /* Make sure the curses mode is enabled.  */
-  tui_enable ();
-
-  /* Switch to the selected layout.  */
-  if (tui_set_layout_for_display_command (arg) != TUI_SUCCESS)
-    warning (_("Invalid layout specified.\n%s"), LAYOUT_USAGE);
-
-}
-
 /* Answer the previous layout to cycle to.  */
 static enum tui_layout_type
 next_layout (void)
 {
-  enum tui_layout_type new_layout;
+  int new_layout;
 
   new_layout = tui_current_layout ();
   if (new_layout == UNDEFINED_LAYOUT)
@@ -609,7 +455,7 @@ next_layout (void)
        new_layout = SRC_COMMAND;
     }
 
-  return new_layout;
+  return (enum tui_layout_type) new_layout;
 }
 
 
@@ -617,7 +463,7 @@ next_layout (void)
 static enum tui_layout_type
 prev_layout (void)
 {
-  enum tui_layout_type new_layout;
+  int new_layout;
 
   new_layout = tui_current_layout ();
   if (new_layout == SRC_COMMAND)
@@ -629,64 +475,9 @@ prev_layout (void)
        new_layout = DISASSEM_DATA_COMMAND;
     }
 
-  return new_layout;
-}
-
-
-
-static void
-make_command_window (struct tui_win_info * * win_info_ptr, int height, int origin_y)
-{
-  *win_info_ptr = init_and_make_win (*win_info_ptr,
-                                    CMD_WIN,
-                                    height,
-                                    tui_term_width (),
-                                    0,
-                                    origin_y,
-                                    DONT_BOX_WINDOW);
-
-  (*win_info_ptr)->can_highlight = FALSE;
+  return (enum tui_layout_type) new_layout;
 }
 
-
-/*
-   ** make_source_window().
- */
-static void
-make_source_window (struct tui_win_info * * win_info_ptr, int height, int origin_y)
-{
-  make_source_or_disasm_window (win_info_ptr, SRC_WIN, height, origin_y);
-
-  return;
-}                              /* make_source_window */
-
-
-/*
-   ** make_disasm_window().
- */
-static void
-make_disasm_window (struct tui_win_info * * win_info_ptr, int height, int origin_y)
-{
-  make_source_or_disasm_window (win_info_ptr, DISASSEM_WIN, height, origin_y);
-
-  return;
-}                              /* make_disasm_window */
-
-
-static void
-make_data_window (struct tui_win_info * * win_info_ptr, int height, int origin_y)
-{
-  *win_info_ptr = init_and_make_win (*win_info_ptr,
-                                    DATA_WIN,
-                                    height,
-                                    tui_term_width (),
-                                    0,
-                                    origin_y,
-                                    BOX_WINDOW);
-}
-
-
-
 /* Show the Source/Command layout.  */
 static void
 show_source_command (void)
@@ -707,110 +498,56 @@ show_disasm_command (void)
 static void
 show_source_disasm_command (void)
 {
-  if (tui_current_layout () != SRC_DISASSEM_COMMAND)
-    {
-      int cmd_height, src_height, asm_height;
-
-      if (TUI_CMD_WIN != NULL)
-       cmd_height = TUI_CMD_WIN->generic.height;
-      else
-       cmd_height = tui_term_height () / 3;
-
-      src_height = (tui_term_height () - cmd_height) / 2;
-      asm_height = tui_term_height () - (src_height + cmd_height);
-
-      if (TUI_SRC_WIN == NULL)
-       make_source_window (&TUI_SRC_WIN, src_height, 0);
-      else
-       {
-         init_gen_win_info (&TUI_SRC_WIN->generic,
-                          TUI_SRC_WIN->generic.type,
-                          src_height,
-                          TUI_SRC_WIN->generic.width,
-                          TUI_SRC_WIN->detail.source_info.execution_info->width,
-                          0);
-         TUI_SRC_WIN->can_highlight = TRUE;
-         init_gen_win_info (TUI_SRC_WIN->detail.source_info.execution_info,
-                          EXEC_INFO_WIN,
-                          src_height,
-                          3,
-                          0,
-                          0);
-         tui_make_visible (&TUI_SRC_WIN->generic);
-         tui_make_visible (TUI_SRC_WIN->detail.source_info.execution_info);
-         TUI_SRC_WIN->detail.source_info.has_locator = FALSE;;
-       }
-      if (TUI_SRC_WIN != NULL)
-       {
-         struct tui_gen_win_info * locator = tui_locator_win_info_ptr ();
+  int cmd_height, src_height, asm_height;
 
-         tui_show_source_content (TUI_SRC_WIN);
-         if (TUI_DISASM_WIN == NULL)
-           {
-             make_disasm_window (&TUI_DISASM_WIN, asm_height, src_height - 1);
-             locator = init_and_make_win (locator,
-                                          LOCATOR_WIN,
-                                          2 /* 1 */ ,
-                                          tui_term_width (),
-                                          0,
-                                          (src_height + asm_height) - 1,
-                                          DONT_BOX_WINDOW);
-           }
-         else
-           {
-             init_gen_win_info (locator,
-                              LOCATOR_WIN,
-                              2 /* 1 */ ,
-                              tui_term_width (),
-                              0,
-                              (src_height + asm_height) - 1);
-             TUI_DISASM_WIN->detail.source_info.has_locator = TRUE;
-             init_gen_win_info (
-                               &TUI_DISASM_WIN->generic,
-                               TUI_DISASM_WIN->generic.type,
-                               asm_height,
-                               TUI_DISASM_WIN->generic.width,
-                       TUI_DISASM_WIN->detail.source_info.execution_info->width,
-                               src_height - 1);
-             init_gen_win_info (TUI_DISASM_WIN->detail.source_info.execution_info,
-                              EXEC_INFO_WIN,
-                              asm_height,
-                              3,
-                              0,
-                              src_height - 1);
-             TUI_DISASM_WIN->can_highlight = TRUE;
-             tui_make_visible (&TUI_DISASM_WIN->generic);
-             tui_make_visible (TUI_DISASM_WIN->detail.source_info.execution_info);
-           }
-         if (TUI_DISASM_WIN != NULL)
-           {
-             TUI_SRC_WIN->detail.source_info.has_locator = FALSE;
-             TUI_DISASM_WIN->detail.source_info.has_locator = TRUE;
-             tui_make_visible (locator);
-             tui_show_locator_content ();
-             tui_show_source_content (TUI_DISASM_WIN);
-
-             if (TUI_CMD_WIN == NULL)
-               make_command_window (&TUI_CMD_WIN,
-                                   cmd_height,
-                                   tui_term_height () - cmd_height);
-             else
-               {
-                 init_gen_win_info (&TUI_CMD_WIN->generic,
-                                  TUI_CMD_WIN->generic.type,
-                                  TUI_CMD_WIN->generic.height,
-                                  TUI_CMD_WIN->generic.width,
-                                  0,
-                                  TUI_CMD_WIN->generic.origin.y);
-                 TUI_CMD_WIN->can_highlight = FALSE;
-                 tui_make_visible (&TUI_CMD_WIN->generic);
-               }
-             if (TUI_CMD_WIN != NULL)
-               tui_refresh_win (&TUI_CMD_WIN->generic);
-           }
-       }
-      tui_set_current_layout_to (SRC_DISASSEM_COMMAND);
-    }
+  if (TUI_CMD_WIN != NULL)
+    cmd_height = TUI_CMD_WIN->height;
+  else
+    cmd_height = tui_term_height () / 3;
+
+  src_height = (tui_term_height () - cmd_height) / 2;
+  asm_height = tui_term_height () - (src_height + cmd_height);
+
+  if (TUI_SRC_WIN == NULL)
+    tui_win_list[SRC_WIN] = new tui_source_window ();
+  TUI_SRC_WIN->reset (src_height,
+                     tui_term_width (),
+                     0,
+                     0);
+  TUI_SRC_WIN->make_visible (true);
+  TUI_SRC_WIN->m_has_locator = false;
+
+  struct tui_locator_window *locator = tui_locator_win_info_ptr ();
+  gdb_assert (locator != nullptr);
+
+  TUI_SRC_WIN->show_source_content ();
+  if (TUI_DISASM_WIN == NULL)
+    tui_win_list[DISASSEM_WIN] = new tui_disasm_window ();
+  TUI_DISASM_WIN->reset (asm_height,
+                        tui_term_width (),
+                        0,
+                        src_height - 1);
+  TUI_DISASM_WIN->make_visible (true);
+  locator->reset (2 /* 1 */ ,
+                 tui_term_width (),
+                 0,
+                 (src_height + asm_height) - 1);
+  TUI_SRC_WIN->m_has_locator = false;
+  TUI_DISASM_WIN->m_has_locator = true;
+  locator->make_visible (true);
+  tui_show_locator_content ();
+  TUI_DISASM_WIN->show_source_content ();
+
+  if (TUI_CMD_WIN == NULL)
+    tui_win_list[CMD_WIN] = new tui_cmd_window ();
+  TUI_CMD_WIN->reset (cmd_height,
+                     tui_term_width (),
+                     0,
+                     tui_term_height () - cmd_height);
+  /* FIXME tui_cmd_window won't recreate the handle on
+     make_visible, so we need this instead.  */
+  tui_make_window (TUI_CMD_WIN, DONT_BOX_WINDOW);
+  current_layout = SRC_DISASSEM_COMMAND;
 }
 
 
@@ -819,251 +556,124 @@ show_source_disasm_command (void)
 static void
 show_data (enum tui_layout_type new_layout)
 {
-  int total_height = (tui_term_height () - TUI_CMD_WIN->generic.height);
+  int total_height = (tui_term_height () - TUI_CMD_WIN->height);
   int src_height, data_height;
   enum tui_win_type win_type;
-  struct tui_gen_win_info * locator = tui_locator_win_info_ptr ();
 
+  struct tui_locator_window *locator = tui_locator_win_info_ptr ();
+  gdb_assert (locator != nullptr);
 
   data_height = total_height / 2;
   src_height = total_height - data_height;
-  tui_make_all_invisible ();
-  tui_make_invisible (locator);
-  make_data_window (&TUI_DATA_WIN, data_height, 0);
-  TUI_DATA_WIN->can_highlight = TRUE;
+  if (tui_win_list[DATA_WIN] == nullptr)
+    tui_win_list[DATA_WIN] = new tui_data_window ();
+  tui_win_list[DATA_WIN]->reset (data_height, tui_term_width (), 0, 0);
+  tui_win_list[DATA_WIN]->make_visible (true);
+
   if (new_layout == SRC_DATA_COMMAND)
     win_type = SRC_WIN;
   else
     win_type = DISASSEM_WIN;
+
   if (tui_win_list[win_type] == NULL)
     {
       if (win_type == SRC_WIN)
-       make_source_window (&tui_win_list[win_type], src_height, data_height - 1);
+       tui_win_list[win_type] = new tui_source_window ();
       else
-       make_disasm_window (&tui_win_list[win_type], src_height, data_height - 1);
-      locator = init_and_make_win (locator,
-                                  LOCATOR_WIN,
-                                  2 /* 1 */ ,
-                                  tui_term_width (),
-                                  0,
-                                  total_height - 1,
-                                  DONT_BOX_WINDOW);
+       tui_win_list[win_type] = new tui_disasm_window ();
     }
-  else
-    {
-      init_gen_win_info (&tui_win_list[win_type]->generic,
-                      tui_win_list[win_type]->generic.type,
-                      src_height,
-                      tui_win_list[win_type]->generic.width,
-                  tui_win_list[win_type]->detail.source_info.execution_info->width,
-                      data_height - 1);
-      init_gen_win_info (tui_win_list[win_type]->detail.source_info.execution_info,
-                      EXEC_INFO_WIN,
-                      src_height,
-                      3,
-                      0,
-                      data_height - 1);
-      tui_make_visible (&tui_win_list[win_type]->generic);
-      tui_make_visible (tui_win_list[win_type]->detail.source_info.execution_info);
-      init_gen_win_info (locator,
-                      LOCATOR_WIN,
-                      2 /* 1 */ ,
-                      tui_term_width (),
-                      0,
-                      total_height - 1);
-    }
-  tui_win_list[win_type]->detail.source_info.has_locator = TRUE;
-  tui_make_visible (locator);
+
+  tui_source_window_base *base
+    = (tui_source_window_base *) tui_win_list[win_type];
+  tui_win_list[win_type]->reset (src_height,
+                                tui_term_width (),
+                                0,
+                                data_height - 1);
+  locator->reset (2 /* 1 */ ,
+                 tui_term_width (),
+                 0,
+                 total_height - 1);
+  base->make_visible (true);
+  base->m_has_locator = true;
+  locator->make_visible (true);
   tui_show_locator_content ();
-  tui_add_to_source_windows (tui_win_list[win_type]);
-  tui_set_current_layout_to (new_layout);
+  tui_add_to_source_windows (base);
+  TUI_CMD_WIN->make_visible (true);
+  current_layout = new_layout;
 }
 
-/*
-   ** init_gen_win_info().
- */
-static void
-init_gen_win_info (struct tui_gen_win_info * win_info, enum tui_win_type type,
-                 int height, int width, int origin_x, int origin_y)
+void
+tui_gen_win_info::reset (int height_, int width_,
+                        int origin_x_, int origin_y_)
 {
-  int h = height;
+  int h = height_;
 
-  win_info->type = type;
-  win_info->width = width;
-  win_info->height = h;
+  width = width_;
+  height = h;
   if (h > 1)
     {
-      win_info->viewport_height = h - 1;
-      if (win_info->type != CMD_WIN)
-       win_info->viewport_height--;
-    }
-  else
-    win_info->viewport_height = 1;
-  win_info->origin.x = origin_x;
-  win_info->origin.y = origin_y;
-
-  return;
-}                              /* init_gen_win_info */
-
-/*
-   ** init_and_make_win().
- */
-static void *
-init_and_make_win (void *opaque_win_info, enum tui_win_type win_type,
-                  int height, int width, int origin_x, int origin_y,
-                  int box_it)
-{
-  struct tui_gen_win_info * generic;
-
-  if (opaque_win_info == NULL)
-    {
-      if (tui_win_is_auxillary (win_type))
-       opaque_win_info = (void *) tui_alloc_generic_win_info ();
-      else
-       opaque_win_info = (void *) tui_alloc_win_info (win_type);
+      viewport_height = h - 1;
+      if (type != CMD_WIN)
+       viewport_height--;
     }
-  if (tui_win_is_auxillary (win_type))
-    generic = (struct tui_gen_win_info *) opaque_win_info;
   else
-    generic = &((struct tui_win_info *) opaque_win_info)->generic;
-
-  if (opaque_win_info != NULL)
-    {
-      init_gen_win_info (generic, win_type, height, width, origin_x, origin_y);
-      if (!tui_win_is_auxillary (win_type))
-       {
-         if (generic->type == CMD_WIN)
-           ((struct tui_win_info *) opaque_win_info)->can_highlight = FALSE;
-         else
-           ((struct tui_win_info *) opaque_win_info)->can_highlight = TRUE;
-       }
-      tui_make_window (generic, box_it);
-    }
-  return opaque_win_info;
+    viewport_height = 1;
+  origin.x = origin_x_;
+  origin.y = origin_y_;
 }
 
-
+/* Show the Source/Command or the Disassem layout.  */
 static void
-make_source_or_disasm_window (struct tui_win_info * * win_info_ptr, enum tui_win_type type,
-                             int height, int origin_y)
+show_source_or_disasm_and_command (enum tui_layout_type layout_type)
 {
-  struct tui_gen_win_info * execution_info = (struct tui_gen_win_info *) NULL;
+  struct tui_source_window_base *win_info;
+  int src_height, cmd_height;
+  struct tui_locator_window *locator = tui_locator_win_info_ptr ();
+  gdb_assert (locator != nullptr);
 
-  /*
-     ** Create the exeuction info window.
-   */
-  if (type == SRC_WIN)
-    execution_info = tui_source_exec_info_win_ptr ();
+  if (TUI_CMD_WIN != NULL)
+    cmd_height = TUI_CMD_WIN->height;
   else
-    execution_info = tui_disassem_exec_info_win_ptr ();
-  execution_info = init_and_make_win (execution_info,
-                                     EXEC_INFO_WIN,
-                                     height,
-                                     3,
-                                     0,
-                                     origin_y,
-                                     DONT_BOX_WINDOW);
-  /*
-     ** Now create the source window.
-   */
-  *win_info_ptr = init_and_make_win (*win_info_ptr,
-                                    type,
-                                    height,
-                                    tui_term_width () - execution_info->width,
-                                    execution_info->width,
-                                    origin_y,
-                                    BOX_WINDOW);
-
-  (*win_info_ptr)->detail.source_info.execution_info = execution_info;
-}
+    cmd_height = tui_term_height () / 3;
+  src_height = tui_term_height () - cmd_height;
 
-
-/* Show the Source/Command or the Disassem layout.   */
-static void
-show_source_or_disasm_and_command (enum tui_layout_type layout_type)
-{
-  if (tui_current_layout () != layout_type)
+  if (layout_type == SRC_COMMAND)
     {
-      struct tui_win_info * *win_info_ptr;
-      int src_height, cmd_height;
-      struct tui_gen_win_info * locator = tui_locator_win_info_ptr ();
-
-      if (TUI_CMD_WIN != NULL)
-       cmd_height = TUI_CMD_WIN->generic.height;
-      else
-       cmd_height = tui_term_height () / 3;
-      src_height = tui_term_height () - cmd_height;
-
+      if (tui_win_list[SRC_WIN] == nullptr)
+       tui_win_list[SRC_WIN] = new tui_source_window ();
+      win_info = TUI_SRC_WIN;
+    }
+  else
+    {
+      if (tui_win_list[DISASSEM_WIN] == nullptr)
+       tui_win_list[DISASSEM_WIN] = new tui_disasm_window ();
+      win_info = TUI_DISASM_WIN;
+    }
 
-      if (layout_type == SRC_COMMAND)
-       win_info_ptr = &TUI_SRC_WIN;
-      else
-       win_info_ptr = &TUI_DISASM_WIN;
+  locator->reset (2 /* 1 */ ,
+                 tui_term_width (),
+                 0,
+                 src_height - 1);
+  win_info->reset (src_height - 1,
+                  tui_term_width (),
+                  0,
+                  0);
+  win_info->make_visible (true);
 
-      if ((*win_info_ptr) == NULL)
-       {
-         if (layout_type == SRC_COMMAND)
-           make_source_window (win_info_ptr, src_height - 1, 0);
-         else
-           make_disasm_window (win_info_ptr, src_height - 1, 0);
-         locator = init_and_make_win (locator,
-                                      LOCATOR_WIN,
-                                      2 /* 1 */ ,
-                                      tui_term_width (),
-                                      0,
-                                      src_height - 1,
-                                      DONT_BOX_WINDOW);
-       }
-      else
-       {
-         init_gen_win_info (locator,
-                          LOCATOR_WIN,
-                          2 /* 1 */ ,
-                          tui_term_width (),
-                          0,
-                          src_height - 1);
-         (*win_info_ptr)->detail.source_info.has_locator = TRUE;
-         init_gen_win_info (
-                           &(*win_info_ptr)->generic,
-                           (*win_info_ptr)->generic.type,
-                           src_height - 1,
-                           (*win_info_ptr)->generic.width,
-                     (*win_info_ptr)->detail.source_info.execution_info->width,
-                           0);
-         init_gen_win_info ((*win_info_ptr)->detail.source_info.execution_info,
-                          EXEC_INFO_WIN,
-                          src_height - 1,
-                          3,
-                          0,
-                          0);
-         (*win_info_ptr)->can_highlight = TRUE;
-         tui_make_visible (&(*win_info_ptr)->generic);
-         tui_make_visible ((*win_info_ptr)->detail.source_info.execution_info);
-       }
-      if ((*win_info_ptr) != NULL)
-       {
-         (*win_info_ptr)->detail.source_info.has_locator = TRUE;
-         tui_make_visible (locator);
-         tui_show_locator_content ();
-         tui_show_source_content (*win_info_ptr);
 
-         if (TUI_CMD_WIN == NULL)
-           {
-             make_command_window (&TUI_CMD_WIN, cmd_height, src_height);
-             tui_refresh_win (&TUI_CMD_WIN->generic);
-           }
-         else
-           {
-             init_gen_win_info (&TUI_CMD_WIN->generic,
-                              TUI_CMD_WIN->generic.type,
-                              TUI_CMD_WIN->generic.height,
-                              TUI_CMD_WIN->generic.width,
-                              TUI_CMD_WIN->generic.origin.x,
-                              TUI_CMD_WIN->generic.origin.y);
-             TUI_CMD_WIN->can_highlight = FALSE;
-             tui_make_visible (&TUI_CMD_WIN->generic);
-           }
-       }
-      tui_set_current_layout_to (layout_type);
-    }
+  win_info->m_has_locator = true;
+  locator->make_visible (true);
+  tui_show_locator_content ();
+  win_info->show_source_content ();
+
+  if (TUI_CMD_WIN == NULL)
+    tui_win_list[CMD_WIN] = new tui_cmd_window ();
+  TUI_CMD_WIN->reset (cmd_height,
+                     tui_term_width (),
+                     0,
+                     src_height);
+  /* FIXME tui_cmd_window won't recreate the handle on
+     make_visible, so we need this instead.  */
+  tui_make_window (TUI_CMD_WIN, DONT_BOX_WINDOW);
+  current_layout = layout_type;
 }
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