/* Get a character from the command window.  This is called from the
   readline package.  */
int
tui_getc (FILE *fp)
{
  int ch;
  WINDOW *w;

  w = TUI_CMD_WIN->generic.handle;

#ifdef TUI_USE_PIPE_FOR_READLINE
  /* Flush readline output.  */
  tui_readline_output (0, 0);
#endif

  ch = wgetch (w);
  ch = tui_handle_resize_during_io (ch);

  /* The \n must be echoed because it will not be printed by
     readline.  */
  if (ch == '\n')
    {
      /* When hitting return with an empty input, gdb executes the last
         command.  If we emit a newline, this fills up the command window
         with empty lines with gdb prompt at beginning.  Instead of that,
         stay on the same line but provide a visual effect to show the
         user we recognized the command.  */
      if (rl_end == 0)
        {
          wmove (w, TUI_CMD_WIN->detail.command_info.cur_line, 0);

          /* Clear the line.  This will blink the gdb prompt since
             it will be redrawn at the same line.  */
          wclrtoeol (w);
          wrefresh (w);
          napms (20);
        }
      else
        {
          wmove (w, TUI_CMD_WIN->detail.command_info.cur_line,
                 TUI_CMD_WIN->detail.command_info.curch);
          waddch (w, ch);
        }
    }
  
  if (key_is_command_char (ch))
    {				/* Handle prev/next/up/down here.  */
      ch = tui_dispatch_ctrl_char (ch);
    }
  
  if (ch == '\n' || ch == '\r' || ch == '\f')
    TUI_CMD_WIN->detail.command_info.curch = 0;
  if (ch == KEY_BACKSPACE)
    return '\b';
  
  return ch;
}
Esempio n. 2
0
/* Get a character from the command window.  This is called from the
   readline package.  */
int
tui_getc (FILE *fp)
{
  int ch;
  WINDOW *w;

  w = TUI_CMD_WIN->generic.handle;

#ifdef TUI_USE_PIPE_FOR_READLINE
  /* Flush readline output.  */
  tui_readline_output (0, 0);
#endif

  ch = wgetch (w);

  /* The \n must be echoed because it will not be printed by
     readline.  */
  if (ch == '\n')
    {
      /* When hitting return with an empty input, gdb executes the last
         command.  If we emit a newline, this fills up the command window
         with empty lines with gdb prompt at beginning.  Instead of that,
         stay on the same line but provide a visual effect to show the
         user we recognized the command.  */
      if (rl_end == 0 && !gdb_in_secondary_prompt_p (current_ui))
        {
	  wmove (w, getcury (w), 0);

          /* Clear the line.  This will blink the gdb prompt since
             it will be redrawn at the same line.  */
          wclrtoeol (w);
          wrefresh (w);
          napms (20);
        }
      else
        {
	  /* Move cursor to the end of the command line before emitting the
	     newline.  We need to do so because when ncurses outputs a newline
	     it truncates any text that appears past the end of the cursor.  */
	  int px, py;
	  getyx (w, py, px);
	  px += rl_end - rl_point;
	  py += px / TUI_CMD_WIN->generic.width;
	  px %= TUI_CMD_WIN->generic.width;
	  wmove (w, py, px);
	  tui_putc ('\n');
        }
    }
  
  /* Handle prev/next/up/down here.  */
  ch = tui_dispatch_ctrl_char (ch);
  
  if (ch == KEY_BACKSPACE)
    return '\b';

  if (current_ui->command_editing && key_is_start_sequence (ch))
    {
      int ch_pending;

      nodelay (w, TRUE);
      ch_pending = wgetch (w);
      nodelay (w, FALSE);

      /* If we have pending input following a start sequence, call the stdin
	 event handler again because ncurses may have already read and stored
	 the input into its internal buffer, meaning that we won't get an stdin
	 event for it.  If we don't compensate for this missed stdin event, key
	 sequences as Alt_F (^[f) will not behave promptly.

	 (We only compensates for the missed 2nd byte of a key sequence because
	 2-byte sequences are by far the most commonly used. ncurses may have
	 buffered a larger, 3+-byte key sequence though it remains to be seen
	 whether it is useful to compensate for all the bytes of such
	 sequences.)  */
      if (ch_pending != ERR)
	{
	  ungetch (ch_pending);
	  call_stdin_event_handler_again_p = 1;
	}
    }

  return ch;
}
Esempio n. 3
0
/* Get a character from the command window.  This is called from the
   readline package.  */
int
tui_getc (FILE *fp)
{
  int ch;
  WINDOW *w;

  w = TUI_CMD_WIN->generic.handle;

#ifdef TUI_USE_PIPE_FOR_READLINE
  /* Flush readline output.  */
  tui_readline_output (0, 0);
#endif

  ch = wgetch (w);
  ch = tui_handle_resize_during_io (ch);

  /* The \n must be echoed because it will not be printed by
     readline.  */
  if (ch == '\n')
    {
      /* When hitting return with an empty input, gdb executes the last
         command.  If we emit a newline, this fills up the command window
         with empty lines with gdb prompt at beginning.  Instead of that,
         stay on the same line but provide a visual effect to show the
         user we recognized the command.  */
      if (rl_end == 0)
        {
          wmove (w, TUI_CMD_WIN->detail.command_info.cur_line, 0);

          /* Clear the line.  This will blink the gdb prompt since
             it will be redrawn at the same line.  */
          wclrtoeol (w);
          wrefresh (w);
          napms (20);
        }
      else
        {
          wmove (w, TUI_CMD_WIN->detail.command_info.cur_line,
                 TUI_CMD_WIN->detail.command_info.curch);
          waddch (w, ch);
        }
    }
  
  if (key_is_command_char (ch))
    {				/* Handle prev/next/up/down here.  */
      ch = tui_dispatch_ctrl_char (ch);
    }
  
  if (ch == '\n' || ch == '\r' || ch == '\f')
    TUI_CMD_WIN->detail.command_info.curch = 0;
  if (ch == KEY_BACKSPACE)
    return '\b';

  if (async_command_editing_p && key_is_start_sequence (ch))
    {
      int ch_pending;

      nodelay (w, TRUE);
      ch_pending = wgetch (w);
      nodelay (w, FALSE);

      /* If we have pending input following a start sequence, call the stdin
	 event handler again because ncurses may have already read and stored
	 the input into its internal buffer, meaning that we won't get an stdin
	 event for it.  If we don't compensate for this missed stdin event, key
	 sequences as Alt_F (^[f) will not behave promptly.

	 (We only compensates for the missed 2nd byte of a key sequence because
	 2-byte sequences are by far the most commonly used. ncurses may have
	 buffered a larger, 3+-byte key sequence though it remains to be seen
	 whether it is useful to compensate for all the bytes of such
	 sequences.)  */
      if (ch_pending != ERR)
	{
	  ungetch (ch_pending);
	  call_stdin_event_handler_again_p = 1;
	}
    }

  return ch;
}