tui-win.c

这个是LINUX下的GDB调度工具的源码

	_num_to_scroll = 1;
      /*
         ** If we are scrolling the source or disassembly window, do a
         ** "psuedo" scroll since not all of the source is in memory,
         ** only what is in the viewport. If win_to_scroll is the
         ** command window do nothing since the term should handle it.
       */
      if (win_to_scroll == TUI_SRC_WIN || win_to_scroll == TUI_DISASM_WIN)
	tui_horizontal_source_scroll (win_to_scroll, LEFT_SCROLL, _num_to_scroll);
    }
}


void
tui_scroll_right (struct tui_win_info * win_to_scroll, int num_to_scroll)
{
  if (win_to_scroll != TUI_CMD_WIN)
    {
      int _num_to_scroll = num_to_scroll;

      if (_num_to_scroll == 0)
	_num_to_scroll = 1;
      /*
         ** If we are scrolling the source or disassembly window, do a
         ** "psuedo" scroll since not all of the source is in memory,
         ** only what is in the viewport. If win_to_scroll is the
         ** command window do nothing since the term should handle it.
       */
      if (win_to_scroll == TUI_SRC_WIN || win_to_scroll == TUI_DISASM_WIN)
	tui_horizontal_source_scroll (win_to_scroll, RIGHT_SCROLL, _num_to_scroll);
    }
}


/* Scroll a window.  Arguments are passed through a va_list.    */
void
tui_scroll (enum tui_scroll_direction direction,
	    struct tui_win_info * win_to_scroll,
	    int num_to_scroll)
{
  switch (direction)
    {
    case FORWARD_SCROLL:
      tui_scroll_forward (win_to_scroll, num_to_scroll);
      break;
    case BACKWARD_SCROLL:
      tui_scroll_backward (win_to_scroll, num_to_scroll);
      break;
    case LEFT_SCROLL:
      tui_scroll_left (win_to_scroll, num_to_scroll);
      break;
    case RIGHT_SCROLL:
      tui_scroll_right (win_to_scroll, num_to_scroll);
      break;
    default:
      break;
    }
}


void
tui_refresh_all_win (void)
{
  enum tui_win_type type;

  clearok (curscr, TRUE);
  tui_refresh_all (tui_win_list);
  for (type = SRC_WIN; type < MAX_MAJOR_WINDOWS; type++)
    {
      if (tui_win_list[type] && tui_win_list[type]->generic.is_visible)
	{
	  switch (type)
	    {
	    case SRC_WIN:
	    case DISASSEM_WIN:
	      tui_show_source_content (tui_win_list[type]);
	      tui_check_and_display_highlight_if_needed (tui_win_list[type]);
	      tui_erase_exec_info_content (tui_win_list[type]);
	      tui_update_exec_info (tui_win_list[type]);
	      break;
	    case DATA_WIN:
	      tui_refresh_data_win ();
	      break;
	    default:
	      break;
	    }
	}
    }
  tui_show_locator_content ();
}


/* Resize all the windows based on the the terminal size.  This
   function gets called from within the readline sinwinch handler.  */
void
tui_resize_all (void)
{
  int height_diff, width_diff;
  int screenheight, screenwidth;

  rl_get_screen_size (&screenheight, &screenwidth);
  width_diff = screenwidth - tui_term_width ();
  height_diff = screenheight - tui_term_height ();
  if (height_diff || width_diff)
    {
      enum tui_layout_type cur_layout = tui_current_layout ();
      struct tui_win_info * win_with_focus = tui_win_with_focus ();
      struct tui_win_info *first_win;
      struct tui_win_info *second_win;
      struct tui_gen_win_info * locator = tui_locator_win_info_ptr ();
      enum tui_win_type win_type;
      int new_height, split_diff, cmd_split_diff, num_wins_displayed = 2;

#ifdef HAVE_RESIZE_TERM
      resize_term (screenheight, screenwidth);
#endif      
      /* turn keypad off while we resize */
      if (win_with_focus != TUI_CMD_WIN)
	keypad (TUI_CMD_WIN->generic.handle, FALSE);
      tui_update_gdb_sizes ();
      tui_set_term_height_to (screenheight);
      tui_set_term_width_to (screenwidth);
      if (cur_layout == SRC_DISASSEM_COMMAND ||
	cur_layout == SRC_DATA_COMMAND || cur_layout == DISASSEM_DATA_COMMAND)
	num_wins_displayed++;
      split_diff = height_diff / num_wins_displayed;
      cmd_split_diff = split_diff;
      if (height_diff % num_wins_displayed)
	{
	  if (height_diff < 0)
	    cmd_split_diff--;
	  else
	    cmd_split_diff++;
	}
      /* now adjust each window */
      clear ();
      refresh ();
      switch (cur_layout)
	{
	case SRC_COMMAND:
	case DISASSEM_COMMAND:
	  first_win = (struct tui_win_info *) (tui_source_windows ())->list[0];
	  first_win->generic.width += width_diff;
	  locator->width += width_diff;
	  /* check for invalid heights */
	  if (height_diff == 0)
	    new_height = first_win->generic.height;
	  else if ((first_win->generic.height + split_diff) >=
		   (screenheight - MIN_CMD_WIN_HEIGHT - 1))
	    new_height = screenheight - MIN_CMD_WIN_HEIGHT - 1;
	  else if ((first_win->generic.height + split_diff) <= 0)
	    new_height = MIN_WIN_HEIGHT;
	  else
	    new_height = first_win->generic.height + split_diff;

	  make_invisible_and_set_new_height (first_win, new_height);
	  TUI_CMD_WIN->generic.origin.y = locator->origin.y + 1;
	  TUI_CMD_WIN->generic.width += width_diff;
	  new_height = screenheight - TUI_CMD_WIN->generic.origin.y;
	  make_invisible_and_set_new_height (TUI_CMD_WIN, new_height);
	  make_visible_with_new_height (first_win);
	  make_visible_with_new_height (TUI_CMD_WIN);
	  if (first_win->generic.content_size <= 0)
	    tui_erase_source_content (first_win, EMPTY_SOURCE_PROMPT);
	  break;
	default:
	  if (cur_layout == SRC_DISASSEM_COMMAND)
	    {
	      first_win = TUI_SRC_WIN;
	      first_win->generic.width += width_diff;
	      second_win = TUI_DISASM_WIN;
	      second_win->generic.width += width_diff;
	    }
	  else
	    {
	      first_win = TUI_DATA_WIN;
	      first_win->generic.width += width_diff;
	      second_win = (struct tui_win_info *) (tui_source_windows ())->list[0];
	      second_win->generic.width += width_diff;
	    }
	  /* Change the first window's height/width */
	  /* check for invalid heights */
	  if (height_diff == 0)
	    new_height = first_win->generic.height;
	  else if ((first_win->generic.height +
		    second_win->generic.height + (split_diff * 2)) >=
		   (screenheight - MIN_CMD_WIN_HEIGHT - 1))
	    new_height = (screenheight - MIN_CMD_WIN_HEIGHT - 1) / 2;
	  else if ((first_win->generic.height + split_diff) <= 0)
	    new_height = MIN_WIN_HEIGHT;
	  else
	    new_height = first_win->generic.height + split_diff;
	  make_invisible_and_set_new_height (first_win, new_height);

	  locator->width += width_diff;

	  /* Change the second window's height/width */
	  /* check for invalid heights */
	  if (height_diff == 0)
	    new_height = second_win->generic.height;
	  else if ((first_win->generic.height +
		    second_win->generic.height + (split_diff * 2)) >=
		   (screenheight - MIN_CMD_WIN_HEIGHT - 1))
	    {
	      new_height = screenheight - MIN_CMD_WIN_HEIGHT - 1;
	      if (new_height % 2)
		new_height = (new_height / 2) + 1;
	      else
		new_height /= 2;
	    }
	  else if ((second_win->generic.height + split_diff) <= 0)
	    new_height = MIN_WIN_HEIGHT;
	  else
	    new_height = second_win->generic.height + split_diff;
	  second_win->generic.origin.y = first_win->generic.height - 1;
	  make_invisible_and_set_new_height (second_win, new_height);

	  /* Change the command window's height/width */
	  TUI_CMD_WIN->generic.origin.y = locator->origin.y + 1;
	  make_invisible_and_set_new_height (
			     TUI_CMD_WIN, TUI_CMD_WIN->generic.height + cmd_split_diff);
	  make_visible_with_new_height (first_win);
	  make_visible_with_new_height (second_win);
	  make_visible_with_new_height (TUI_CMD_WIN);
	  if (first_win->generic.content_size <= 0)
	    tui_erase_source_content (first_win, EMPTY_SOURCE_PROMPT);
	  if (second_win->generic.content_size <= 0)
	    tui_erase_source_content (second_win, EMPTY_SOURCE_PROMPT);
	  break;
	}
      /*
         ** Now remove all invisible windows, and their content so that they get
         ** created again when called for with the new size
       */
      for (win_type = SRC_WIN; (win_type < MAX_MAJOR_WINDOWS); win_type++)
	{
	  if (win_type != CMD_WIN && (tui_win_list[win_type] != NULL)
	      && !tui_win_list[win_type]->generic.is_visible)
	    {
	      tui_free_window (tui_win_list[win_type]);
	      tui_win_list[win_type] = (struct tui_win_info *) NULL;
	    }
	}
      tui_set_win_resized_to (TRUE);
      /* turn keypad back on, unless focus is in the command window */
      if (win_with_focus != TUI_CMD_WIN)
	keypad (TUI_CMD_WIN->generic.handle, TRUE);
    }
}


/* SIGWINCH signal handler for the tui.  This signal handler is always
   called, even when the readline package clears signals because it is
   set as the old_sigwinch() (TUI only).  */
void
tui_sigwinch_handler (int signal)
{
  /*
     ** Say that a resize was done so that the readline can do it
     ** later when appropriate.
   */
  tui_set_win_resized_to (TRUE);
}



/*************************
** STATIC LOCAL FUNCTIONS
**************************/


static void
tui_scroll_forward_command (char *arg, int from_tty)
{
  int num_to_scroll = 1;
  struct tui_win_info * win_to_scroll;

  /* Make sure the curses mode is enabled.  */
  tui_enable ();
  if (arg == (char *) NULL)
    parse_scrolling_args (arg, &win_to_scroll, (int *) NULL);
  else
    parse_scrolling_args (arg, &win_to_scroll, &num_to_scroll);
  tui_scroll (FORWARD_SCROLL, win_to_scroll, num_to_scroll);
}


static void
tui_scroll_backward_command (char *arg, int from_tty)
{
  int num_to_scroll = 1;
  struct tui_win_info * win_to_scroll;

  /* Make sure the curses mode is enabled.  */
  tui_enable ();
  if (arg == (char *) NULL)
    parse_scrolling_args (arg, &win_to_scroll, (int *) NULL);
  else
    parse_scrolling_args (arg, &win_to_scroll, &num_to_scroll);
  tui_scroll (BACKWARD_SCROLL, win_to_scroll, num_to_scroll);
}


static void
tui_scroll_left_command (char *arg, int from_tty)
{
  int num_to_scroll;
  struct tui_win_info * win_to_scroll;

  /* Make sure the curses mode is enabled.  */
  tui_enable ();
  parse_scrolling_args (arg, &win_to_scroll, &num_to_scroll);
  tui_scroll (LEFT_SCROLL, win_to_scroll, num_to_scroll);
}


static void
tui_scroll_right_command (char *arg, int from_tty)
{
  int num_to_scroll;
  struct tui_win_info * win_to_scroll;

  /* Make sure the curses mode is enabled.  */
  tui_enable ();
  parse_scrolling_args (arg, &win_to_scroll, &num_to_scroll);
  tui_scroll (RIGHT_SCROLL, win_to_scroll, num_to_scroll);
}


/* Set focus to the window named by 'arg'.  */
static void
tui_set_focus (char *arg, int from_tty)
{
  if (arg != (char *) NULL)
    {
      char *buf_ptr = (char *) xstrdup (arg);
      int i;
      struct tui_win_info * win_info = (struct tui_win_info *) NULL;

      for (i = 0; (i < strlen (buf_ptr)); i++)
	buf_ptr[i] = toupper (arg[i]);

      if (subset_compare (buf_ptr, "NEXT"))
	win_info = tui_next_win (tui_win_with_focus ());
      else if (subset_compare (buf_ptr, "PREV"))
	win_info = tui_prev_win (tui_win_with_focus ());
      else
	win_info = tui_partial_win_by_name (buf_ptr);

      if (win_info == (struct tui_win_info *) NULL || !win_info->generic.is_visible)
	warning ("Invalid window specified. \n\
The window name specified must be valid and visible.\n");
      else
	{
	  tui_set_win_focus_to (win_info);
	  keypad (TUI_CMD_WIN->generic.handle, (win_info != TUI_CMD_WIN));
	}

      if (TUI_DATA_WIN && TUI_DATA_WIN->generic.is_visible)
	tui_refresh_data_win ();
      xfree (buf_ptr);
      printf_filtered ("Focus set to %s window.\n",
		       tui_win_name ((struct tui_gen_win_info *) tui_win_with_focus ()));
    }
  else
    warning ("Incorrect Number of Arguments.\n%s", FOCUS_USAGE);
}

static void
tui_set_focus_command (char *arg, int from_tty)
{
  /* Make sure the curses mode is enabled.  */
  tui_enable ();
  tui_set_focus (arg, from_tty);
}


static void
tui_all_windows_info (char *arg, int from_tty)
{
  enum tui_win_type type;
  struct tui_win_info * win_with_focus = tui_win_with_focus ();

  for (type = SRC_WIN; (type < MAX_MAJOR_WINDOWS); type++)
    if (tui_win_list[type] && tui_win_list[type]->generic.is_visible)
      {
	if (win_with_focus == tui_win_list[type])
	  printf_filtered ("        %s\t(%d lines)  <has focus>\n",
			   tui_win_name (&tui_win_list[type]->generic),
			   tui_win_list[type]->generic.height);
	else
	  printf_filtered ("        %s\t(%d lines)\n",
			   tui_win_name (&tui_win_list[type]->generic),
			   tui_win_list[type]->generic.height);
      }
}


static void
tui_refresh_all_command (char *arg, int from_tty)
{
  /* Make sure the curses mode is enabled.  */
  tui_enable ();

  tui_refresh_all_win ();
}


/* Set the height of the specified window.   */
static void
tui_set_tab_width_command (char *arg, int from_tty)
{
  /* Make sure the curses mode is enabled.  */
  tui_enable ();
  if (arg != (char *) NULL)
    {
      int ts;

      ts = atoi (arg);
      if (ts > 0)
	tui_set_default_tab_len (ts);
      else
	warning ("Tab widths greater than 0 must be specified.\n");
    }
}


/* Set the height of the specified window.   */
static void
tui_set_win_height (char *arg, int from_tty)
{
  /* Make sure the curses mode is enabled.  */
  tui_enable ();
  if (arg != (char *) NULL)
    {
      char *buf = xstrdup (arg);
      char *buf_ptr = buf;
      char *wname = (char *) NULL;
      int new_height, i;
      struct tui_win_info * win_info;

      wname = buf_ptr;
      buf_ptr = strchr (buf_ptr, ' ');
      if (buf_ptr != (char *) NULL)
	{
	  *buf_ptr = (char) 0;

	  /*
	     ** Validate the window name
	   */
	  for (i = 0; i < strlen (wname); i++)
	    wname[i] = toupper (wname[i]);
	  win_info = tui_partial_win_by_name (wname);

	  if (win_info == (struct tui_win_info *) NULL || !win_info->generic.is_visible)
	    warning ("Invalid window specified. \n\
The window name specified must be valid and visible.\n");
	  else
	    {
	      /* Process the size */
	      while (*(++buf_ptr) == ' ')
		;

	      if (*buf_ptr != (char) 0)
		{
		  int negate = FALSE;
		  int fixed_size = TRUE;
		  int input_no;;

		  if (*buf_ptr == '+' || *buf_ptr == '-')
		    {
		      if (*buf_ptr == '-')
			negate = TRUE;
		      fixed_size = FALSE;
		      buf_ptr++;
		    }
		  input_no = atoi (buf_ptr);
		  if (input_no > 0)
		    {
		      if (negate)
			input_no *= (-1);
		      if (fixed_size)
			new_height = input_no;
		      else
			new_height = win_info->generic.height + input_no;
		      /*
		         ** Now change the window's height, and adjust all
		         ** other windows around it
		       */
		      if (tui_adjust_win_heights (win_info,
						new_height) == TUI_FAILURE)
			warning ("Invalid window height specified.\n%s",
				 WIN_HEIGHT_USAGE);
		      else
                        tui_update_gdb_sizes ();
		    }
		  else
		    warning ("Invalid window height specified.\n%s",
			     WIN_HEIGHT_USAGE);
		}
	    }
	}
      else
	printf_filtered (WIN_HEIGHT_USAGE);

      if (buf != (char *) NULL)
	xfree (buf);