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/* General functions for the WDB TUI.

   Copyright (C) 1998, 1999, 2000, 2001, 2002, 2003, 2004, 2007, 2008, 2009,

   2010 Free Software Foundation, Inc.

   Contributed by Hewlett-Packard Company.

   This file is part of GDB.

   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 3 of the License, or

   (at your option) any later version.

   This program is distributed in the hope that it will be useful,

   but WITHOUT ANY WARRANTY; without even the implied warranty of

   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the

   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, see <http://www.gnu.org/licenses/>.  */

#include "defs.h"

#include "gdbcmd.h"

#include "tui/tui.h"

#include "tui/tui-hooks.h"

#include "tui/tui-data.h"

#include "tui/tui-layout.h"

#include "tui/tui-io.h"

#include "tui/tui-regs.h"

#include "tui/tui-stack.h"

#include "tui/tui-win.h"

#include "tui/tui-winsource.h"

#include "tui/tui-windata.h"

#include "target.h"

#include "frame.h"

#include "breakpoint.h"

#include "inferior.h"

#include "symtab.h"

#include "source.h"

#include <stdio.h>

#include <stdlib.h>

#include <ctype.h>

#include <signal.h>

#include <fcntl.h>

#if 0

#include <termio.h>

#endif

#include <setjmp.h>

#include "gdb_curses.h"

/* This redefines CTRL if it is not already defined, so it must come

   after terminal state releated include files like <term.h> and

   "gdb_curses.h".  */

#include "readline/readline.h"

/* Tells whether the TUI is active or not.  */

int tui_active = 0;

static int tui_finish_init = 1;

enum tui_key_mode tui_current_key_mode = TUI_COMMAND_MODE;

struct tui_char_command

{

  unsigned char key;

  const char *cmd;

};

/* Key mapping to gdb commands when the TUI is using the single key

   mode.  */

static const struct tui_char_command tui_commands[] = {

  { 'c', "continue" },

  { 'd', "down" },

  { 'f', "finish" },

  { 'n', "next" },

  { 'r', "run" },

  { 's', "step" },

  { 'u', "up" },

  { 'v', "info locals" },

  { 'w', "where" },

  { 0, 0 },

};

static Keymap tui_keymap;

static Keymap tui_readline_standard_keymap;

/* TUI readline command.

   Switch the output mode between TUI/standard gdb.  */

static int

tui_rl_switch_mode (int notused1, int notused2)

{

  if (tui_active)

    {

      tui_disable ();

      rl_prep_terminal (0);

    }

  else

    {

      rl_deprep_terminal ();

      tui_enable ();

    }

  /* Clear the readline in case switching occurred in middle of

     something.  */

  if (rl_end)

    rl_kill_text (0, rl_end);

  /* Since we left the curses mode, the terminal mode is restored to

     some previous state.  That state may not be suitable for readline

     to work correctly (it may be restored in line mode).  We force an

     exit of the current readline so that readline is re-entered and

     it will be able to setup the terminal for its needs.  By

     re-entering in readline, we also redisplay its prompt in the

     non-curses mode.  */

  rl_newline (1, '\n');

  /* Make sure the \n we are returning does not repeat the last

     command.  */

  dont_repeat ();

  return 0;

}

/* TUI readline command.

   Change the TUI layout to show a next layout.

   This function is bound to CTRL-X 2.  It is intended to provide

   a functionality close to the Emacs split-window command.  We

   always show two windows (src+asm), (src+regs) or (asm+regs).  */

static int

tui_rl_change_windows (int notused1, int notused2)

{

  if (!tui_active)

    tui_rl_switch_mode (0 /* notused */, 0 /* notused */);

  if (tui_active)

    {

      enum tui_layout_type new_layout;

      enum tui_register_display_type regs_type = TUI_UNDEFINED_REGS;

      new_layout = tui_current_layout ();

      /* Select a new layout to have a rolling layout behavior with

         always two windows (except when undefined).  */

      switch (new_layout)

        {

        case SRC_COMMAND:

          new_layout = SRC_DISASSEM_COMMAND;

          break;

        case DISASSEM_COMMAND:

          new_layout = SRC_DISASSEM_COMMAND;

          break;

        case SRC_DATA_COMMAND:

          new_layout = SRC_DISASSEM_COMMAND;

          break;

        case SRC_DISASSEM_COMMAND:

          new_layout = DISASSEM_DATA_COMMAND;

          break;

        case DISASSEM_DATA_COMMAND:

          new_layout = SRC_DATA_COMMAND;

          break;

        default:

          new_layout = SRC_COMMAND;

          break;

        }

      tui_set_layout (new_layout, regs_type);

    }

  return 0;

}

/* TUI readline command.

   Delete the second TUI window to only show one.  */

static int

tui_rl_delete_other_windows (int notused1, int notused2)

{

  if (!tui_active)

    tui_rl_switch_mode (0 /* notused */, 0 /* notused */);

  if (tui_active)

    {

      enum tui_layout_type new_layout;

      enum tui_register_display_type regs_type = TUI_UNDEFINED_REGS;

      new_layout = tui_current_layout ();

      /* Kill one window.  */

      switch (new_layout)

        {

        case SRC_COMMAND:

        case SRC_DATA_COMMAND:

        case SRC_DISASSEM_COMMAND:

        default:

          new_layout = SRC_COMMAND;

          break;

        case DISASSEM_COMMAND:

        case DISASSEM_DATA_COMMAND:

          new_layout = DISASSEM_COMMAND;

          break;

        }

      tui_set_layout (new_layout, regs_type);

    }

  return 0;

}

/* TUI readline command.

   Switch the active window to give the focus to a next window.  */

static int

tui_rl_other_window (int count, int key)

{

  struct tui_win_info *win_info;

  if (!tui_active)

    tui_rl_switch_mode (0 /* notused */, 0 /* notused */);

  win_info = tui_next_win (tui_win_with_focus ());

  if (win_info)

    {

      tui_set_win_focus_to (win_info);

      if (TUI_DATA_WIN && TUI_DATA_WIN->generic.is_visible)

        tui_refresh_data_win ();

      keypad (TUI_CMD_WIN->generic.handle, (win_info != TUI_CMD_WIN));

    }

  return 0;

}

/* TUI readline command.

   Execute the gdb command bound to the specified key.  */

static int

tui_rl_command_key (int count, int key)

{

  int i;

  reinitialize_more_filter ();

  for (i = 0; tui_commands[i].cmd; i++)

    {

      if (tui_commands[i].key == key)

        {

          /* Must save the command because it can be modified by

             execute_command.  */

          char *cmd = alloca (strlen (tui_commands[i].cmd) + 1);

          strcpy (cmd, tui_commands[i].cmd);

          execute_command (cmd, TRUE);

          return 0;

        }

    }

  return 0;

}

/* TUI readline command.

   Temporarily leave the TUI SingleKey mode to allow editing

   a gdb command with the normal readline.  Once the command

   is executed, the TUI SingleKey mode is installed back.  */

static int

tui_rl_command_mode (int count, int key)

{

  tui_set_key_mode (TUI_ONE_COMMAND_MODE);

  return rl_insert (count, key);

}

/* TUI readline command.

   Switch between TUI SingleKey mode and gdb readline editing.  */

static int

tui_rl_next_keymap (int notused1, int notused2)

{

  if (!tui_active)

    tui_rl_switch_mode (0 /* notused */, 0 /* notused */);

  tui_set_key_mode (tui_current_key_mode == TUI_COMMAND_MODE

                    ? TUI_SINGLE_KEY_MODE : TUI_COMMAND_MODE);

  return 0;

}

/* Readline hook to redisplay ourself the gdb prompt.

   In the SingleKey mode, the prompt is not printed so that

   the command window is cleaner.  It will be displayed if

   we temporarily leave the SingleKey mode.  */

static int

tui_rl_startup_hook (void)

{

  rl_already_prompted = 1;

  if (tui_current_key_mode != TUI_COMMAND_MODE)

    tui_set_key_mode (TUI_SINGLE_KEY_MODE);

  tui_redisplay_readline ();

  return 0;

}

/* Change the TUI key mode by installing the appropriate readline

   keymap.  */

void

tui_set_key_mode (enum tui_key_mode mode)

{

  tui_current_key_mode = mode;

  rl_set_keymap (mode == TUI_SINGLE_KEY_MODE

                 ? tui_keymap : tui_readline_standard_keymap);

  tui_show_locator_content ();

}

/* Initialize readline and configure the keymap for the switching

   key shortcut.  */

void

tui_initialize_readline (void)

{

  int i;

  Keymap tui_ctlx_keymap;

  rl_initialize ();

  rl_add_defun ("tui-switch-mode", tui_rl_switch_mode, -1);

  rl_add_defun ("gdb-command", tui_rl_command_key, -1);

  rl_add_defun ("next-keymap", tui_rl_next_keymap, -1);

  tui_keymap = rl_make_bare_keymap ();

  tui_ctlx_keymap = rl_make_bare_keymap ();

  tui_readline_standard_keymap = rl_get_keymap ();

  for (i = 0; tui_commands[i].cmd; i++)

    rl_bind_key_in_map (tui_commands[i].key, tui_rl_command_key, tui_keymap);

  rl_generic_bind (ISKMAP, "\\C-x", (char*) tui_ctlx_keymap, tui_keymap);

  /* Bind all other keys to tui_rl_command_mode so that we switch

     temporarily from SingleKey mode and can enter a gdb command.  */

  for (i = ' '; i < 0x7f; i++)

    {

      int j;

      for (j = 0; tui_commands[j].cmd; j++)

        if (tui_commands[j].key == i)

          break;

      if (tui_commands[j].cmd)

        continue;

      rl_bind_key_in_map (i, tui_rl_command_mode, tui_keymap);

    }

  rl_bind_key_in_map ('a', tui_rl_switch_mode, emacs_ctlx_keymap);

  rl_bind_key_in_map ('a', tui_rl_switch_mode, tui_ctlx_keymap);

  rl_bind_key_in_map ('A', tui_rl_switch_mode, emacs_ctlx_keymap);

  rl_bind_key_in_map ('A', tui_rl_switch_mode, tui_ctlx_keymap);

  rl_bind_key_in_map (CTRL ('A'), tui_rl_switch_mode, emacs_ctlx_keymap);

  rl_bind_key_in_map (CTRL ('A'), tui_rl_switch_mode, tui_ctlx_keymap);

  rl_bind_key_in_map ('1', tui_rl_delete_other_windows, emacs_ctlx_keymap);

  rl_bind_key_in_map ('1', tui_rl_delete_other_windows, tui_ctlx_keymap);

  rl_bind_key_in_map ('2', tui_rl_change_windows, emacs_ctlx_keymap);

  rl_bind_key_in_map ('2', tui_rl_change_windows, tui_ctlx_keymap);

  rl_bind_key_in_map ('o', tui_rl_other_window, emacs_ctlx_keymap);

  rl_bind_key_in_map ('o', tui_rl_other_window, tui_ctlx_keymap);

  rl_bind_key_in_map ('q', tui_rl_next_keymap, tui_keymap);

  rl_bind_key_in_map ('s', tui_rl_next_keymap, emacs_ctlx_keymap);

  rl_bind_key_in_map ('s', tui_rl_next_keymap, tui_ctlx_keymap);

}

/* Enter in the tui mode (curses).

   When in normal mode, it installs the tui hooks in gdb, redirects

   the gdb output, configures the readline to work in tui mode.

   When in curses mode, it does nothing.  */

void

tui_enable (void)

{

  if (!tui_allowed_p ())

    error (_("TUI mode not allowed"));

  if (tui_active)

    return;

  /* To avoid to initialize curses when gdb starts, there is a defered

     curses initialization.  This initialization is made only once

     and the first time the curses mode is entered.  */

  if (tui_finish_init)

    {

      WINDOW *w;

      w = initscr ();

      cbreak ();

      noecho ();

      /* timeout (1); */

      nodelay(w, FALSE);

      nl();

      keypad (w, TRUE);

      rl_initialize ();

      tui_set_term_height_to (LINES);

      tui_set_term_width_to (COLS);

      def_prog_mode ();

      tui_show_frame_info (0);

      tui_set_layout (SRC_COMMAND, TUI_UNDEFINED_REGS);

      tui_set_win_focus_to (TUI_SRC_WIN);

      keypad (TUI_CMD_WIN->generic.handle, TRUE);

      wrefresh (TUI_CMD_WIN->generic.handle);

      tui_finish_init = 0;

    }

  else

    {

     /* Save the current gdb setting of the terminal.

        Curses will restore this state when endwin() is called.  */

     def_shell_mode ();

     clearok (stdscr, TRUE);

   }

  /* Install the TUI specific hooks.  */

  tui_install_hooks ();

  rl_startup_hook = tui_rl_startup_hook;

  tui_update_variables ();

  tui_setup_io (1);

  tui_active = 1;

  if (deprecated_safe_get_selected_frame ())

     tui_show_frame_info (deprecated_safe_get_selected_frame ());

  /* Restore TUI keymap.  */

  tui_set_key_mode (tui_current_key_mode);

  tui_refresh_all_win ();

  /* Update gdb's knowledge of its terminal.  */

  target_terminal_save_ours ();

  tui_update_gdb_sizes ();

}

/* Leave the tui mode.

   Remove the tui hooks and configure the gdb output and readline

   back to their original state.  The curses mode is left so that

   the terminal setting is restored to the point when we entered.  */

void

tui_disable (void)

{

  if (!tui_active)

    return;

  /* Restore initial readline keymap.  */

  rl_set_keymap (tui_readline_standard_keymap);

  /* Remove TUI hooks.  */

  tui_remove_hooks ();

  rl_startup_hook = 0;

  rl_already_prompted = 0;

  /* Leave curses and restore previous gdb terminal setting.  */

  endwin ();

  /* gdb terminal has changed, update gdb internal copy of it

     so that terminal management with the inferior works.  */

  tui_setup_io (0);

  /* Update gdb's knowledge of its terminal.  */

  target_terminal_save_ours ();

  tui_active = 0;

  tui_update_gdb_sizes ();

}

void

strcat_to_buf (char *buf, int buflen,

               const char *item_to_add)

{

  if (item_to_add != (char *) NULL && buf != (char *) NULL)

    {

      if ((strlen (buf) + strlen (item_to_add)) <= buflen)

        strcat (buf, item_to_add);

      else

        strncat (buf, item_to_add, (buflen - strlen (buf)));

    }

}

#if 0

/* Solaris <sys/termios.h> defines CTRL.  */

#ifndef CTRL

#define CTRL(x)         (x & ~0140)

#endif

#define FILEDES         2

#define CHK(val, dft)   (val<=0 ? dft : val)

static void

tui_reset (void)

{

  struct termio mode;

  /* Reset the teletype mode bits to a sensible state.

     Copied tset.c.  */

#if defined (TIOCGETC)

  struct tchars tbuf;

#endif /* TIOCGETC */

#ifdef UCB_NTTY

  struct ltchars ltc;

  if (ldisc == NTTYDISC)

    {

      ioctl (FILEDES, TIOCGLTC, &ltc);

      ltc.t_suspc = CHK (ltc.t_suspc, CTRL ('Z'));

      ltc.t_dsuspc = CHK (ltc.t_dsuspc, CTRL ('Y'));

      ltc.t_rprntc = CHK (ltc.t_rprntc, CTRL ('R'));

      ltc.t_flushc = CHK (ltc.t_flushc, CTRL ('O'));

      ltc.t_werasc = CHK (ltc.t_werasc, CTRL ('W'));

      ltc.t_lnextc = CHK (ltc.t_lnextc, CTRL ('V'));

      ioctl (FILEDES, TIOCSLTC, &ltc);

    }

#endif /* UCB_NTTY */

#ifdef TIOCGETC

  ioctl (FILEDES, TIOCGETC, &tbuf);

  tbuf.t_intrc = CHK (tbuf.t_intrc, CTRL ('?'));

  tbuf.t_quitc = CHK (tbuf.t_quitc, CTRL ('\\'));

  tbuf.t_startc = CHK (tbuf.t_startc, CTRL ('Q'));

  tbuf.t_stopc = CHK (tbuf.t_stopc, CTRL ('S'));

  tbuf.t_eofc = CHK (tbuf.t_eofc, CTRL ('D'));

  /* brkc is left alone.  */

  ioctl (FILEDES, TIOCSETC, &tbuf);

#endif /* TIOCGETC */

  mode.sg_flags &= ~(RAW

#ifdef CBREAK

                     | CBREAK

#endif /* CBREAK */

                     | VTDELAY | ALLDELAY);

  mode.sg_flags |= XTABS | ECHO | CRMOD | ANYP;

  return;

}

#endif

void

tui_show_source (const char *file, int line)

{

  struct symtab_and_line cursal = get_current_source_symtab_and_line ();

  /* Make sure that the source window is displayed.  */

  tui_add_win_to_layout (SRC_WIN);

  tui_update_source_windows_with_line (cursal.symtab, line);

  tui_update_locator_filename (file);

}

void

tui_show_assembly (struct gdbarch *gdbarch, CORE_ADDR addr)

{

  tui_add_win_to_layout (DISASSEM_WIN);

  tui_update_source_windows_with_addr (gdbarch, addr);

}

int

tui_is_window_visible (enum tui_win_type type)

{

  if (tui_active == 0)

    return 0;

  if (tui_win_list[type] == 0)

    return 0;

  return tui_win_list[type]->generic.is_visible;

}

int

tui_get_command_dimension (unsigned int *width,

                           unsigned int *height)

{

  if (!tui_active || (TUI_CMD_WIN == NULL))

    {

      return 0;

    }

  *width = TUI_CMD_WIN->generic.width;

  *height = TUI_CMD_WIN->generic.height;

  return 1;

}