C++ rl_redisplay函数代码示例

static void print_line(char *line)
{

	char *saved_line = NULL;
	int saved_point = 0;

	/* This is readline stuff.
	   - save the cursor position
	   - save the current line contents
	   - set the line to blank
	   - tell readline we're done mucking
	   - print the message
	   - restore the standard prompt
	   - restore the line contents
	   - restore the cursor position
	   - tell readline we're done mucking (again)
	*/
	saved_point = rl_point;
	saved_line = rl_copy_text(0, rl_end);
	rl_set_prompt("");
	rl_replace_line("",0);
	rl_redisplay();
	fprintf(stdout, "%s", line);
	rl_set_prompt(PROMPT);
	rl_replace_line(saved_line, 0);
	rl_point = saved_point;
	rl_redisplay();
	free(saved_line);
}

static int handle_enter(int x, int y)
{
	char *line = NULL;

	/* Handle when a user presses enter.
	   - Save the contents of the line.
	   - Set the prompt to nothing.
	   - Blank the line.
	   - pass the message to the message handler
	   - rl_copy_text returns malloc'd mem, so free it
	   - restore the prompt
	   - tell readline we're done mucking
	*/
	line = rl_copy_text(0, rl_end);
	rl_set_prompt("");
	rl_replace_line("", 1);
	rl_redisplay();

	handle_msg(line);

	free(line);

	rl_set_prompt(PROMPT);
	rl_redisplay();

	rl_done = 1;
	return 0;
}

void cli_printv(const char *fmt, va_list args)
{
	SHL_PROTECT_ERRNO;
	_shl_free_ char *line = NULL;
	int point;
	bool async;

	/* In case we print messages during readline() activity, we need to
	 * correctly save and restore RL-internal state. */
	async = is_cli() && !RL_ISSTATE(RL_STATE_DONE);

	if (async) {
		point = rl_point;
		line = rl_copy_text(0, rl_end);
		rl_save_prompt();
		rl_replace_line("", 0);
		rl_redisplay();
	}

	vprintf(fmt, args);

	if (async) {
		rl_restore_prompt();
		rl_replace_line(line, 0);
		rl_point = point;
		rl_redisplay();
	}
}

void Console::writeAsync(QString string)
{
  int need_hack = (rl_readline_state & RL_STATE_READCMD) > 0;

  char *saved_line = NULL;
  int saved_point = 0;
  if (need_hack)
  {
    saved_point = rl_point;
    saved_line = rl_copy_text(0, rl_end);
    rl_save_prompt();
    rl_replace_line("", 0);
    rl_redisplay();
  }

  std::cout << "\r" << string.toStdString();

  if (need_hack)
  {
    rl_restore_prompt();
    rl_replace_line(saved_line, 0);
    rl_point = saved_point;
    rl_redisplay();
    free(saved_line);
  }
}

void PrintAndLog(char *fmt, ...)
{
	char *saved_line;
	int saved_point;
	va_list argptr, argptr2;
	static FILE *logfile = NULL;
	static int logging=1;

	// lock this section to avoid interlacing prints from different threats
	pthread_mutex_lock(&print_lock);
  
	if (logging && !logfile) {
		logfile=fopen(logfilename, "a");
		if (!logfile) {
			fprintf(stderr, "Can't open logfile, logging disabled!\n");
			logging=0;
		}
	}
	
	int need_hack = (rl_readline_state & RL_STATE_READCMD) > 0;

	if (need_hack) {
		saved_point = rl_point;
		saved_line = rl_copy_text(0, rl_end);
		rl_save_prompt();
		rl_replace_line("", 0);
		rl_redisplay();
	}
	
	va_start(argptr, fmt);
	va_copy(argptr2, argptr);
	vprintf(fmt, argptr);
	printf("          "); // cleaning prompt
	va_end(argptr);
	printf("\n");

	if (need_hack) {
		rl_restore_prompt();
		rl_replace_line(saved_line, 0);
		rl_point = saved_point;
		rl_redisplay();
		free(saved_line);
	}
	
	if (logging && logfile) {
		vfprintf(logfile, fmt, argptr2);
		fprintf(logfile,"\n");
		fflush(logfile);
	}
	va_end(argptr2);

	if (flushAfterWrite == 1)  //buzzy
	{
		fflush(NULL);
	}
	//release lock
	pthread_mutex_unlock(&print_lock);  
}

 void printlog(int c) {
     char* saved_line;
     int saved_point;
     saved_point = rl_point;
     saved_line = rl_copy_text(0, rl_end);
     rl_set_prompt("");
     rl_replace_line("", 0);
     rl_redisplay();
     //printf("Message: %d\n", c);
     rl_set_prompt(prompt);
     rl_replace_line(saved_line, 0);
     rl_point = saved_point;
     rl_redisplay();
     free(saved_line);
 }

void PrintAndLog(char *fmt, ...)
{
	char *saved_line;
	int saved_point;
  va_list argptr, argptr2;
  static FILE *logfile = NULL;
  static int logging=1;

  if (logging && !logfile) {
    logfile=fopen(logfilename, "a");
    if (!logfile) {
      fprintf(stderr, "Can't open logfile, logging disabled!\n");
      logging=0;
    }
  }
	
	int need_hack = (rl_readline_state & RL_STATE_READCMD) > 0;

	if (need_hack) {
		saved_point = rl_point;
		saved_line = rl_copy_text(0, rl_end);
		rl_save_prompt();
		rl_replace_line("", 0);
		rl_redisplay();
	}
	
  va_start(argptr, fmt);
  va_copy(argptr2, argptr);
  vprintf(fmt, argptr);
  printf("          "); // cleaning prompt
  va_end(argptr);
  printf("\n");

	if (need_hack) {
		rl_restore_prompt();
		rl_replace_line(saved_line, 0);
		rl_point = saved_point;
		rl_redisplay();
		free(saved_line);
	}
	
  if (logging && logfile) {
    vfprintf(logfile, fmt, argptr2);
    fprintf(logfile,"\n");
    fflush(logfile);
  }
  va_end(argptr2);
}

/*
 * window_write()
 *
 * dopisuje liniê do bufora danego okna.
 */
int window_write(int id, const /*locale*/ char *line)
{
	window_t *w = window_exist(id);
	readline_window_t *r = readline_window(w);
	int i = 1;

	if (!line || !w)
		return -1;

	/* je¶li ca³y bufor zajêty, zwolnij pierwsz± liniê i przesuñ do góry */
	if (r->line[MAX_LINES_PER_SCREEN - 1]) {
		xfree(r->line[0]);
		memmove(&(r->line[0]), &(r->line[1]), sizeof(char *) * (MAX_LINES_PER_SCREEN - 1));
		r->line[MAX_LINES_PER_SCREEN - 1] = xstrdup(line);
	} else {
		/* znajd¼ pierwsz± woln± liniê i siê wpisz. */
		for (i = 0; i < MAX_LINES_PER_SCREEN; i++)
			if (!r->line[i]) {
				r->line[i] = xstrdup(line);
				break;
			}
	}

	if (w != window_current) {
		set_prompt(current_prompt());
		rl_redisplay();
	}
	
	return 0;
}

int
cli_rl_out (struct cli_state *state, const char *fmt, va_list ap)
{
        int tmp_rl_point = rl_point;
        int            n = rl_end;
        int            i = 0;
        int            ret = 0;

        if (rl_end >= 0 ) {
                rl_kill_text (0, rl_end);
                rl_redisplay ();
        }

        printf ("\r");

        for (i = 0; i <= strlen (state->prompt); i++)
                printf (" ");

        printf ("\r");

        ret = vprintf (fmt, ap);

        printf ("\n");
        fflush(stdout);

        if (n) {
                rl_do_undo ();
                rl_point = tmp_rl_point;
                rl_reset_line_state ();
        }

        return ret;
}

void
async_printf (const char *fmt, va_list ap)
{
        int tmp_rl_point = rl_point;
        int n = rl_end;
        unsigned int i;

        if (rl_end >= 0 ) {
                rl_kill_text (0, rl_end);
                rl_redisplay ();
        }
        printf ("\r");
        for (i=0 ; i<=strlen (state.prompt) ; i++)
                printf (" ");
        printf ("\r");
        vprintf (fmt, ap);
        printf ("\n");
        fflush(stdout);
        if (n) {
                rl_do_undo ();
                rl_point = tmp_rl_point;
                rl_reset_line_state ();
        }
        rl_forced_update_display ();
}

static int
match_paren(int x, int k)
{
  int tmp;
  fd_set readset;
  struct timeval timeout;
  
  rl_insert(x, k);

  /* Did we just insert a quoted paren?  If so, then don't bounce.  */
  if (rl_point - 1 >= 1
      && rl_line_buffer[rl_point - 2] == '\\')
    return 0;

  /* tmp = 200000 */
  timeout.tv_sec = 0 /* tmp / 1000000 */ ; 
  timeout.tv_usec = 200000 /* tmp % 1000000 */ ;
  FD_ZERO(&readset);
  FD_SET(fileno(rl_instream), &readset);
  
  if(rl_point > 1) {
    tmp = rl_point;
    rl_point = find_matching_paren(k);
    if(rl_point > -1) {
      rl_redisplay();
      select(1, &readset, NULL, NULL, &timeout);
    }
    rl_point = tmp;
  }

  return 0;
}

void edit_deinit(const char *history_file,
		 int (*filter_cb)(void *ctx, const char *cmd))
{
	rl_set_prompt("");
	rl_replace_line("", 0);
	rl_redisplay();
	rl_callback_handler_remove();
	readline_free_completions();

	eloop_unregister_read_sock(STDIN_FILENO);

	if (history_file) {
		/* Save command history, excluding lines that may contain
		 * passwords. */
		HIST_ENTRY *h;
		history_set_pos(0);
		while ((h = current_history())) {
			char *p = h->line;
			while (*p == ' ' || *p == '\t')
				p++;
			if (filter_cb && filter_cb(edit_cb_ctx, p)) {
				h = remove_history(where_history());
				if (h) {
					free(h->line);
					free(h->data);
					free(h);
				} else
					next_history();
			} else
				next_history();
		}
		write_history(history_file);
	}
}

int io_handle_enter(int x, int y) {
	char* line = NULL;

	line = rl_copy_text(0, rl_end);
	rl_set_prompt("");
	rl_replace_line("", 1);
	rl_redisplay();

	//cmd_execute(line);

	if (strcmp(line, "") != 0) {
		add_history(line);
	}
	free(line);

	/* rl_set_prompt(prompt); */
	/* rl_redisplay(); */


	// wip - clear line on enter
	wmove(winCommandMode, 1, 1);
	//wprintw(winCommandMode, "      ");
	wclrtoeol(winCommandMode);
	wmove(winCommandMode, 1, 1);
	wprintw(winCommandMode, ">");
	wrefresh(winCommandMode);

	/* force readline to think that the current line was "eaten" and executed */
	rl_done = 1;
	return 0;
}

static void cli_handler_fn(char *input)
{
	_shl_free_ char *original = input;
	_shl_strv_free_ char **args = NULL;
	int r;

	if (!input) {
		rl_insert_text("quit");
		rl_redisplay();
		rl_crlf();
		sd_event_exit(cli_event, 0);
		return;
	}

	r = shl_qstr_tokenize(input, &args);
	if (r < 0)
		return cli_vENOMEM();
	else if (!r)
		return;

	add_history(original);
	r = cli_do(cli_cmds, args, r);
	if (r != -EAGAIN)
		return;

	cli_printf("Command not found\n");
}

static PyObject *
redisplay(PyObject *self, PyObject *noarg)
{
	rl_redisplay();
	Py_INCREF(Py_None);
	return Py_None;
}