wait_return(int redraw)
{
    int		c;
    int		oldState;
    int		tmpState;
    int		had_got_int;
    int		save_reg_recording;
    FILE	*save_scriptout;

    if (redraw == TRUE)
	must_redraw = CLEAR;

    // If using ":silent cmd", don't wait for a return.  Also don't set
    // need_wait_return to do it later.
    if (msg_silent != 0)
	return;

    /*
     * When inside vgetc(), we can't wait for a typed character at all.
     * With the global command (and some others) we only need one return at
     * the end. Adjust cmdline_row to avoid the next message overwriting the
     * last one.
     */
    if (vgetc_busy > 0)
	return;
    need_wait_return = TRUE;
    if (no_wait_return)
    {
	if (!exmode_active)
	    cmdline_row = msg_row;
	return;
    }

    redir_off = TRUE;		// don't redirect this message
    oldState = State;
    if (quit_more)
    {
	c = CAR;		// just pretend CR was hit
	quit_more = FALSE;
	got_int = FALSE;
    }
    else if (exmode_active)
    {
	msg_puts(" ");		// make sure the cursor is on the right line
	c = CAR;		// no need for a return in ex mode
	got_int = FALSE;
    }
    else
    {
	// Make sure the hit-return prompt is on screen when 'guioptions' was
	// just changed.
	screenalloc(FALSE);

	State = MODE_HITRETURN;
	setmouse();
#ifdef USE_ON_FLY_SCROLL
	dont_scroll = TRUE;		// disallow scrolling here
#endif
	cmdline_row = msg_row;

	// Avoid the sequence that the user types ":" at the hit-return prompt
	// to start an Ex command, but the file-changed dialog gets in the
	// way.
	if (need_check_timestamps)
	    check_timestamps(FALSE);

	hit_return_msg();

	do
	{
	    // Remember "got_int", if it is set vgetc() probably returns a
	    // CTRL-C, but we need to loop then.
	    had_got_int = got_int;

	    // Don't do mappings here, we put the character back in the
	    // typeahead buffer.
	    ++no_mapping;
	    ++allow_keys;

	    // Temporarily disable Recording. If Recording is active, the
	    // character will be recorded later, since it will be added to the
	    // typebuf after the loop
	    save_reg_recording = reg_recording;
	    save_scriptout = scriptout;
	    reg_recording = 0;
	    scriptout = NULL;
	    c = safe_vgetc();
	    if (had_got_int && !global_busy)
		got_int = FALSE;
	    --no_mapping;
	    --allow_keys;
	    reg_recording = save_reg_recording;
	    scriptout = save_scriptout;

#ifdef FEAT_CLIPBOARD
	    // Strange way to allow copying (yanking) a modeless selection at
	    // the hit-enter prompt.  Use CTRL-Y, because the same is used in
	    // Cmdline-mode and it's harmless when there is no selection.
	    if (c == Ctrl_Y && clip_star.state == SELECT_DONE)
	    {
		clip_copy_modeless_selection(TRUE);
		c = K_IGNORE;
	    }
#endif

	    /*
	     * Allow scrolling back in the messages.
	     * Also accept scroll-down commands when messages fill the screen,
	     * to avoid that typing one 'j' too many makes the messages
	     * disappear.
	     */
	    if (p_more && !p_cp)
	    {
		if (c == 'b' || c == 'k' || c == 'u' || c == 'g'
						|| c == K_UP || c == K_PAGEUP)
		{
		    if (msg_scrolled > Rows)
			// scroll back to show older messages
			do_more_prompt(c);
		    else
		    {
			msg_didout = FALSE;
			c = K_IGNORE;
			msg_col =
#ifdef FEAT_RIGHTLEFT
			    cmdmsg_rl ? Columns - 1 :
#endif
			    0;
		    }
		    if (quit_more)
		    {
			c = CAR;		// just pretend CR was hit
			quit_more = FALSE;
			got_int = FALSE;
		    }
		    else if (c != K_IGNORE)
		    {
			c = K_IGNORE;
			hit_return_msg();
		    }
		}
		else if (msg_scrolled > Rows - 2
			 && (c == 'j' || c == 'd' || c == 'f'
					   || c == K_DOWN || c == K_PAGEDOWN))
		    c = K_IGNORE;
	    }
	} while ((had_got_int && c == Ctrl_C)
				|| c == K_IGNORE
#ifdef FEAT_GUI
				|| c == K_VER_SCROLLBAR || c == K_HOR_SCROLLBAR
#endif
				|| c == K_LEFTDRAG   || c == K_LEFTRELEASE
				|| c == K_MIDDLEDRAG || c == K_MIDDLERELEASE
				|| c == K_RIGHTDRAG  || c == K_RIGHTRELEASE
				|| c == K_MOUSELEFT  || c == K_MOUSERIGHT
				|| c == K_MOUSEDOWN  || c == K_MOUSEUP
				|| c == K_MOUSEMOVE
				|| (!mouse_has(MOUSE_RETURN)
				    && mouse_row < msg_row
				    && (c == K_LEFTMOUSE
					|| c == K_MIDDLEMOUSE
					|| c == K_RIGHTMOUSE
					|| c == K_X1MOUSE
					|| c == K_X2MOUSE))
				);
	ui_breakcheck();
	/*
	 * Avoid that the mouse-up event causes visual mode to start.
	 */
	if (c == K_LEFTMOUSE || c == K_MIDDLEMOUSE || c == K_RIGHTMOUSE
					  || c == K_X1MOUSE || c == K_X2MOUSE)
	    (void)jump_to_mouse(MOUSE_SETPOS, NULL, 0);
	else if (vim_strchr((char_u *)"\r\n ", c) == NULL && c != Ctrl_C)
	{
	    // Put the character back in the typeahead buffer.  Don't use the
	    // stuff buffer, because lmaps wouldn't work.
	    ins_char_typebuf(vgetc_char, vgetc_mod_mask);
	    do_redraw = TRUE;	    // need a redraw even though there is
				    // typeahead
	}
    }
    redir_off = FALSE;

    /*
     * If the user hits ':', '?' or '/' we get a command line from the next
     * line.
     */
    if (c == ':' || c == '?' || c == '/')
    {
	if (!exmode_active)
	    cmdline_row = msg_row;
	skip_redraw = TRUE;	    // skip redraw once
	do_redraw = FALSE;
#ifdef FEAT_TERMINAL
	skip_term_loop = TRUE;
#endif
    }

    /*
     * If the window size changed set_shellsize() will redraw the screen.
     * Otherwise the screen is only redrawn if 'redraw' is set and no ':'
     * typed.
     */
    tmpState = State;
    State = oldState;		    // restore State before set_shellsize
    setmouse();
    msg_check();

#if defined(UNIX) || defined(VMS)
    /*
     * When switching screens, we need to output an extra newline on exit.
     */
    if (swapping_screen() && !termcap_active)
	newline_on_exit = TRUE;
#endif

    need_wait_return = FALSE;
    did_wait_return = TRUE;
    emsg_on_display = FALSE;	// can delete error message now
    lines_left = -1;		// reset lines_left at next msg_start()
    reset_last_sourcing();
    if (keep_msg != NULL && vim_strsize(keep_msg) >=
				  (Rows - cmdline_row - 1) * Columns + sc_col)
	VIM_CLEAR(keep_msg);	    // don't redisplay message, it's too long

    if (tmpState == MODE_SETWSIZE)  // got resize event while in vgetc()
    {
	starttermcap();		    // start termcap before redrawing
	shell_resized();
    }
    else if (!skip_redraw
	    && (redraw == TRUE || (msg_scrolled != 0 && redraw != -1)))
    {
	starttermcap();		    // start termcap before redrawing
	redraw_later(VALID);
    }
}
Unknown