1742 lines
49 KiB
C
1742 lines
49 KiB
C
/* $FreeBSD$ */
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/* display.c -- readline redisplay facility. */
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/* Copyright (C) 1987, 1989, 1992 Free Software Foundation, Inc.
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This file is part of the GNU Readline Library, a library for
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reading lines of text with interactive input and history editing.
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The GNU Readline Library is free software; you can redistribute it
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and/or modify it under the terms of the GNU General Public License
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as published by the Free Software Foundation; either version 2, or
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(at your option) any later version.
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The GNU Readline Library is distributed in the hope that it will be
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useful, but WITHOUT ANY WARRANTY; without even the implied warranty
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of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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The GNU General Public License is often shipped with GNU software, and
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is generally kept in a file called COPYING or LICENSE. If you do not
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have a copy of the license, write to the Free Software Foundation,
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59 Temple Place, Suite 330, Boston, MA 02111 USA. */
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#define READLINE_LIBRARY
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#if defined (HAVE_CONFIG_H)
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# include <config.h>
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#endif
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#include <sys/types.h>
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#if defined (HAVE_UNISTD_H)
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# include <unistd.h>
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#endif /* HAVE_UNISTD_H */
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#include "posixstat.h"
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#if defined (HAVE_STDLIB_H)
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# include <stdlib.h>
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#else
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# include "ansi_stdlib.h"
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#endif /* HAVE_STDLIB_H */
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#include <stdio.h>
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/* System-specific feature definitions and include files. */
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#include "rldefs.h"
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/* Termcap library stuff. */
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#include "tcap.h"
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/* Some standard library routines. */
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#include "readline.h"
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#include "history.h"
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#include "rlprivate.h"
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#include "xmalloc.h"
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#if !defined (strchr) && !defined (__STDC__)
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extern char *strchr (), *strrchr ();
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#endif /* !strchr && !__STDC__ */
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#if defined (HACK_TERMCAP_MOTION)
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extern char *_rl_term_forward_char;
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#endif
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static void update_line __P((char *, char *, int, int, int, int));
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static void space_to_eol __P((int));
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static void delete_chars __P((int));
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static void insert_some_chars __P((char *, int));
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static void cr __P((void));
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static int *inv_lbreaks, *vis_lbreaks;
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static int inv_lbsize, vis_lbsize;
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/* Heuristic used to decide whether it is faster to move from CUR to NEW
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by backing up or outputting a carriage return and moving forward. */
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#define CR_FASTER(new, cur) (((new) + 1) < ((cur) - (new)))
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/* **************************************************************** */
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/* */
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/* Display stuff */
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/* */
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/* **************************************************************** */
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/* This is the stuff that is hard for me. I never seem to write good
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display routines in C. Let's see how I do this time. */
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/* (PWP) Well... Good for a simple line updater, but totally ignores
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the problems of input lines longer than the screen width.
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update_line and the code that calls it makes a multiple line,
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automatically wrapping line update. Careful attention needs
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to be paid to the vertical position variables. */
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/* Keep two buffers; one which reflects the current contents of the
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screen, and the other to draw what we think the new contents should
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be. Then compare the buffers, and make whatever changes to the
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screen itself that we should. Finally, make the buffer that we
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just drew into be the one which reflects the current contents of the
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screen, and place the cursor where it belongs.
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Commands that want to can fix the display themselves, and then let
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this function know that the display has been fixed by setting the
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RL_DISPLAY_FIXED variable. This is good for efficiency. */
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/* Application-specific redisplay function. */
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rl_voidfunc_t *rl_redisplay_function = rl_redisplay;
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/* Global variables declared here. */
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/* What YOU turn on when you have handled all redisplay yourself. */
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int rl_display_fixed = 0;
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int _rl_suppress_redisplay = 0;
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/* The stuff that gets printed out before the actual text of the line.
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This is usually pointing to rl_prompt. */
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char *rl_display_prompt = (char *)NULL;
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/* Pseudo-global variables declared here. */
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/* The visible cursor position. If you print some text, adjust this. */
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int _rl_last_c_pos = 0;
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int _rl_last_v_pos = 0;
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/* Number of lines currently on screen minus 1. */
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int _rl_vis_botlin = 0;
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/* Variables used only in this file. */
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/* The last left edge of text that was displayed. This is used when
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doing horizontal scrolling. It shifts in thirds of a screenwidth. */
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static int last_lmargin;
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/* The line display buffers. One is the line currently displayed on
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the screen. The other is the line about to be displayed. */
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static char *visible_line = (char *)NULL;
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static char *invisible_line = (char *)NULL;
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/* A buffer for `modeline' messages. */
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static char msg_buf[128];
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/* Non-zero forces the redisplay even if we thought it was unnecessary. */
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static int forced_display;
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/* Default and initial buffer size. Can grow. */
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static int line_size = 1024;
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/* Variables to keep track of the expanded prompt string, which may
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include invisible characters. */
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static char *local_prompt, *local_prompt_prefix;
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static int prompt_visible_length, prompt_prefix_length;
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/* The number of invisible characters in the line currently being
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displayed on the screen. */
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static int visible_wrap_offset;
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/* The number of invisible characters in the prompt string. Static so it
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can be shared between rl_redisplay and update_line */
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static int wrap_offset;
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/* The index of the last invisible character in the prompt string. */
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static int prompt_last_invisible;
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/* The length (buffer offset) of the first line of the last (possibly
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multi-line) buffer displayed on the screen. */
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static int visible_first_line_len;
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/* Number of invisible characters on the first physical line of the prompt.
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Only valid when the number of physical characters in the prompt exceeds
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(or is equal to) _rl_screenwidth. */
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static int prompt_invis_chars_first_line;
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static int prompt_last_screen_line;
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/* Expand the prompt string S and return the number of visible
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characters in *LP, if LP is not null. This is currently more-or-less
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a placeholder for expansion. LIP, if non-null is a place to store the
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index of the last invisible character in the returned string. NIFLP,
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if non-zero, is a place to store the number of invisible characters in
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the first prompt line. */
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/* Current implementation:
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\001 (^A) start non-visible characters
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\002 (^B) end non-visible characters
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all characters except \001 and \002 (following a \001) are copied to
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the returned string; all characters except those between \001 and
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\002 are assumed to be `visible'. */
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static char *
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expand_prompt (pmt, lp, lip, niflp)
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char *pmt;
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int *lp, *lip, *niflp;
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{
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char *r, *ret, *p;
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int l, rl, last, ignoring, ninvis, invfl;
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/* Short-circuit if we can. */
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if (strchr (pmt, RL_PROMPT_START_IGNORE) == 0)
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{
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r = savestring (pmt);
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if (lp)
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*lp = strlen (r);
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return r;
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}
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l = strlen (pmt);
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r = ret = xmalloc (l + 1);
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invfl = 0; /* invisible chars in first line of prompt */
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for (rl = ignoring = last = ninvis = 0, p = pmt; p && *p; p++)
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{
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/* This code strips the invisible character string markers
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RL_PROMPT_START_IGNORE and RL_PROMPT_END_IGNORE */
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if (*p == RL_PROMPT_START_IGNORE)
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{
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ignoring++;
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continue;
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}
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else if (ignoring && *p == RL_PROMPT_END_IGNORE)
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{
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ignoring = 0;
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last = r - ret - 1;
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continue;
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}
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else
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{
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*r++ = *p;
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if (!ignoring)
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rl++;
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else
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ninvis++;
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if (rl == _rl_screenwidth)
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invfl = ninvis;
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}
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}
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if (rl < _rl_screenwidth)
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invfl = ninvis;
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*r = '\0';
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if (lp)
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*lp = rl;
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if (lip)
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*lip = last;
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if (niflp)
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*niflp = invfl;
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return ret;
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}
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/* Just strip out RL_PROMPT_START_IGNORE and RL_PROMPT_END_IGNORE from
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PMT and return the rest of PMT. */
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char *
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_rl_strip_prompt (pmt)
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char *pmt;
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{
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char *ret;
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ret = expand_prompt (pmt, (int *)NULL, (int *)NULL, (int *)NULL);
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return ret;
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}
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/*
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* Expand the prompt string into the various display components, if
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* necessary.
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*
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* local_prompt = expanded last line of string in rl_display_prompt
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* (portion after the final newline)
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* local_prompt_prefix = portion before last newline of rl_display_prompt,
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* expanded via expand_prompt
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* prompt_visible_length = number of visible characters in local_prompt
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* prompt_prefix_length = number of visible characters in local_prompt_prefix
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*
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* This function is called once per call to readline(). It may also be
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* called arbitrarily to expand the primary prompt.
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*
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* The return value is the number of visible characters on the last line
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* of the (possibly multi-line) prompt.
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*/
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int
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rl_expand_prompt (prompt)
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char *prompt;
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{
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char *p, *t;
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int c;
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/* Clear out any saved values. */
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FREE (local_prompt);
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FREE (local_prompt_prefix);
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local_prompt = local_prompt_prefix = (char *)0;
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prompt_last_invisible = prompt_visible_length = 0;
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if (prompt == 0 || *prompt == 0)
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return (0);
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p = strrchr (prompt, '\n');
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if (!p)
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{
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/* The prompt is only one logical line, though it might wrap. */
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local_prompt = expand_prompt (prompt, &prompt_visible_length,
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&prompt_last_invisible,
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&prompt_invis_chars_first_line);
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local_prompt_prefix = (char *)0;
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return (prompt_visible_length);
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}
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else
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{
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/* The prompt spans multiple lines. */
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t = ++p;
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local_prompt = expand_prompt (p, &prompt_visible_length,
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&prompt_last_invisible,
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&prompt_invis_chars_first_line);
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c = *t; *t = '\0';
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/* The portion of the prompt string up to and including the
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final newline is now null-terminated. */
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local_prompt_prefix = expand_prompt (prompt, &prompt_prefix_length,
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(int *)NULL,
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&prompt_invis_chars_first_line);
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*t = c;
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return (prompt_prefix_length);
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}
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}
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/* Initialize the VISIBLE_LINE and INVISIBLE_LINE arrays, and their associated
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arrays of line break markers. MINSIZE is the minimum size of VISIBLE_LINE
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and INVISIBLE_LINE; if it is greater than LINE_SIZE, LINE_SIZE is
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increased. If the lines have already been allocated, this ensures that
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they can hold at least MINSIZE characters. */
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static void
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init_line_structures (minsize)
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int minsize;
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{
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register int n;
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if (invisible_line == 0) /* initialize it */
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{
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if (line_size < minsize)
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line_size = minsize;
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visible_line = xmalloc (line_size);
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invisible_line = xmalloc (line_size);
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}
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else if (line_size < minsize) /* ensure it can hold MINSIZE chars */
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{
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line_size *= 2;
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if (line_size < minsize)
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line_size = minsize;
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visible_line = xrealloc (visible_line, line_size);
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invisible_line = xrealloc (invisible_line, line_size);
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}
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for (n = minsize; n < line_size; n++)
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{
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visible_line[n] = 0;
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invisible_line[n] = 1;
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}
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if (vis_lbreaks == 0)
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{
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/* should be enough. */
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inv_lbsize = vis_lbsize = 256;
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inv_lbreaks = (int *)xmalloc (inv_lbsize * sizeof (int));
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vis_lbreaks = (int *)xmalloc (vis_lbsize * sizeof (int));
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inv_lbreaks[0] = vis_lbreaks[0] = 0;
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}
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}
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/* Basic redisplay algorithm. */
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void
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rl_redisplay ()
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{
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register int in, out, c, linenum, cursor_linenum;
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register char *line;
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int c_pos, inv_botlin, lb_botlin, lb_linenum;
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int newlines, lpos, temp;
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char *prompt_this_line;
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if (!readline_echoing_p)
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return;
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if (!rl_display_prompt)
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rl_display_prompt = "";
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if (invisible_line == 0)
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{
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init_line_structures (0);
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rl_on_new_line ();
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}
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/* Draw the line into the buffer. */
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c_pos = -1;
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line = invisible_line;
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out = inv_botlin = 0;
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/* Mark the line as modified or not. We only do this for history
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lines. */
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if (_rl_mark_modified_lines && current_history () && rl_undo_list)
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{
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line[out++] = '*';
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line[out] = '\0';
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}
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/* If someone thought that the redisplay was handled, but the currently
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visible line has a different modification state than the one about
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to become visible, then correct the caller's misconception. */
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if (visible_line[0] != invisible_line[0])
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rl_display_fixed = 0;
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/* If the prompt to be displayed is the `primary' readline prompt (the
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one passed to readline()), use the values we have already expanded.
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If not, use what's already in rl_display_prompt. WRAP_OFFSET is the
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number of non-visible characters in the prompt string. */
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if (rl_display_prompt == rl_prompt || local_prompt)
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{
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int local_len = local_prompt ? strlen (local_prompt) : 0;
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if (local_prompt_prefix && forced_display)
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_rl_output_some_chars (local_prompt_prefix, strlen (local_prompt_prefix));
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if (local_len > 0)
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{
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temp = local_len + out + 2;
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if (temp >= line_size)
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{
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line_size = (temp + 1024) - (temp % 1024);
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visible_line = xrealloc (visible_line, line_size);
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line = invisible_line = xrealloc (invisible_line, line_size);
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}
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strncpy (line + out, local_prompt, local_len);
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out += local_len;
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}
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line[out] = '\0';
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wrap_offset = local_len - prompt_visible_length;
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}
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else
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{
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int pmtlen;
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prompt_this_line = strrchr (rl_display_prompt, '\n');
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if (!prompt_this_line)
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prompt_this_line = rl_display_prompt;
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else
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{
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prompt_this_line++;
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pmtlen = prompt_this_line - rl_display_prompt; /* temp var */
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if (forced_display)
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{
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_rl_output_some_chars (rl_display_prompt, pmtlen);
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/* Make sure we are at column zero even after a newline,
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regardless of the state of terminal output processing. */
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if (pmtlen < 2 || prompt_this_line[-2] != '\r')
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cr ();
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}
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}
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pmtlen = strlen (prompt_this_line);
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temp = pmtlen + out + 2;
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if (temp >= line_size)
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{
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line_size = (temp + 1024) - (temp % 1024);
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visible_line = xrealloc (visible_line, line_size);
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line = invisible_line = xrealloc (invisible_line, line_size);
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}
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strncpy (line + out, prompt_this_line, pmtlen);
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out += pmtlen;
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line[out] = '\0';
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wrap_offset = prompt_invis_chars_first_line = 0;
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}
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#define CHECK_INV_LBREAKS() \
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do { \
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if (newlines >= (inv_lbsize - 2)) \
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{ \
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inv_lbsize *= 2; \
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inv_lbreaks = (int *)xrealloc (inv_lbreaks, inv_lbsize * sizeof (int)); \
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} \
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} while (0)
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#define CHECK_LPOS() \
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do { \
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lpos++; \
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if (lpos >= _rl_screenwidth) \
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{ \
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if (newlines >= (inv_lbsize - 2)) \
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{ \
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inv_lbsize *= 2; \
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inv_lbreaks = (int *)xrealloc (inv_lbreaks, inv_lbsize * sizeof (int)); \
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} \
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inv_lbreaks[++newlines] = out; \
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lpos = 0; \
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} \
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} while (0)
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/* inv_lbreaks[i] is where line i starts in the buffer. */
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inv_lbreaks[newlines = 0] = 0;
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lpos = out - wrap_offset;
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/* prompt_invis_chars_first_line is the number of invisible characters in
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the first physical line of the prompt.
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wrap_offset - prompt_invis_chars_first_line is the number of invis
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chars on the second line. */
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/* what if lpos is already >= _rl_screenwidth before we start drawing the
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contents of the command line? */
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while (lpos >= _rl_screenwidth)
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{
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/* fix from Darin Johnson <darin@acuson.com> for prompt string with
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invisible characters that is longer than the screen width. The
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prompt_invis_chars_first_line variable could be made into an array
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saying how many invisible characters there are per line, but that's
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probably too much work for the benefit gained. How many people have
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prompts that exceed two physical lines? */
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temp = ((newlines + 1) * _rl_screenwidth) +
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((newlines == 0) ? prompt_invis_chars_first_line : 0) +
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((newlines == 1) ? wrap_offset : 0);
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inv_lbreaks[++newlines] = temp;
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lpos -= _rl_screenwidth;
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}
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|
|
prompt_last_screen_line = newlines;
|
|
|
|
/* Draw the rest of the line (after the prompt) into invisible_line, keeping
|
|
track of where the cursor is (c_pos), the number of the line containing
|
|
the cursor (lb_linenum), the last line number (lb_botlin and inv_botlin).
|
|
It maintains an array of line breaks for display (inv_lbreaks).
|
|
This handles expanding tabs for display and displaying meta characters. */
|
|
lb_linenum = 0;
|
|
for (in = 0; in < rl_end; in++)
|
|
{
|
|
c = (unsigned char)rl_line_buffer[in];
|
|
|
|
if (out + 8 >= line_size) /* XXX - 8 for \t */
|
|
{
|
|
line_size *= 2;
|
|
visible_line = xrealloc (visible_line, line_size);
|
|
invisible_line = xrealloc (invisible_line, line_size);
|
|
line = invisible_line;
|
|
}
|
|
|
|
if (in == rl_point)
|
|
{
|
|
c_pos = out;
|
|
lb_linenum = newlines;
|
|
}
|
|
|
|
if (META_CHAR (c))
|
|
{
|
|
if (_rl_output_meta_chars == 0)
|
|
{
|
|
sprintf (line + out, "\\%o", c);
|
|
|
|
if (lpos + 4 >= _rl_screenwidth)
|
|
{
|
|
temp = _rl_screenwidth - lpos;
|
|
CHECK_INV_LBREAKS ();
|
|
inv_lbreaks[++newlines] = out + temp;
|
|
lpos = 4 - temp;
|
|
}
|
|
else
|
|
lpos += 4;
|
|
|
|
out += 4;
|
|
}
|
|
else
|
|
{
|
|
line[out++] = c;
|
|
CHECK_LPOS();
|
|
}
|
|
}
|
|
#if defined (DISPLAY_TABS)
|
|
else if (c == '\t')
|
|
{
|
|
register int newout;
|
|
|
|
#if 0
|
|
newout = (out | (int)7) + 1;
|
|
#else
|
|
newout = out + 8 - lpos % 8;
|
|
#endif
|
|
temp = newout - out;
|
|
if (lpos + temp >= _rl_screenwidth)
|
|
{
|
|
register int temp2;
|
|
temp2 = _rl_screenwidth - lpos;
|
|
CHECK_INV_LBREAKS ();
|
|
inv_lbreaks[++newlines] = out + temp2;
|
|
lpos = temp - temp2;
|
|
while (out < newout)
|
|
line[out++] = ' ';
|
|
}
|
|
else
|
|
{
|
|
while (out < newout)
|
|
line[out++] = ' ';
|
|
lpos += temp;
|
|
}
|
|
}
|
|
#endif
|
|
else if (c == '\n' && _rl_horizontal_scroll_mode == 0 && _rl_term_up && *_rl_term_up)
|
|
{
|
|
line[out++] = '\0'; /* XXX - sentinel */
|
|
CHECK_INV_LBREAKS ();
|
|
inv_lbreaks[++newlines] = out;
|
|
lpos = 0;
|
|
}
|
|
else if (CTRL_CHAR (c) || c == RUBOUT)
|
|
{
|
|
line[out++] = '^';
|
|
CHECK_LPOS();
|
|
line[out++] = CTRL_CHAR (c) ? UNCTRL (c) : '?';
|
|
CHECK_LPOS();
|
|
}
|
|
else
|
|
{
|
|
line[out++] = c;
|
|
CHECK_LPOS();
|
|
}
|
|
}
|
|
line[out] = '\0';
|
|
if (c_pos < 0)
|
|
{
|
|
c_pos = out;
|
|
lb_linenum = newlines;
|
|
}
|
|
|
|
inv_botlin = lb_botlin = newlines;
|
|
CHECK_INV_LBREAKS ();
|
|
inv_lbreaks[newlines+1] = out;
|
|
cursor_linenum = lb_linenum;
|
|
|
|
/* C_POS == position in buffer where cursor should be placed.
|
|
CURSOR_LINENUM == line number where the cursor should be placed. */
|
|
|
|
/* PWP: now is when things get a bit hairy. The visible and invisible
|
|
line buffers are really multiple lines, which would wrap every
|
|
(screenwidth - 1) characters. Go through each in turn, finding
|
|
the changed region and updating it. The line order is top to bottom. */
|
|
|
|
/* If we can move the cursor up and down, then use multiple lines,
|
|
otherwise, let long lines display in a single terminal line, and
|
|
horizontally scroll it. */
|
|
|
|
if (_rl_horizontal_scroll_mode == 0 && _rl_term_up && *_rl_term_up)
|
|
{
|
|
int nleft, pos, changed_screen_line;
|
|
|
|
if (!rl_display_fixed || forced_display)
|
|
{
|
|
forced_display = 0;
|
|
|
|
/* If we have more than a screenful of material to display, then
|
|
only display a screenful. We should display the last screen,
|
|
not the first. */
|
|
if (out >= _rl_screenchars)
|
|
out = _rl_screenchars - 1;
|
|
|
|
/* The first line is at character position 0 in the buffer. The
|
|
second and subsequent lines start at inv_lbreaks[N], offset by
|
|
OFFSET (which has already been calculated above). */
|
|
|
|
#define W_OFFSET(line, offset) ((line) == 0 ? offset : 0)
|
|
#define VIS_LLEN(l) ((l) > _rl_vis_botlin ? 0 : (vis_lbreaks[l+1] - vis_lbreaks[l]))
|
|
#define INV_LLEN(l) (inv_lbreaks[l+1] - inv_lbreaks[l])
|
|
#define VIS_CHARS(line) (visible_line + vis_lbreaks[line])
|
|
#define VIS_LINE(line) ((line) > _rl_vis_botlin) ? "" : VIS_CHARS(line)
|
|
#define INV_LINE(line) (invisible_line + inv_lbreaks[line])
|
|
|
|
/* For each line in the buffer, do the updating display. */
|
|
for (linenum = 0; linenum <= inv_botlin; linenum++)
|
|
{
|
|
update_line (VIS_LINE(linenum), INV_LINE(linenum), linenum,
|
|
VIS_LLEN(linenum), INV_LLEN(linenum), inv_botlin);
|
|
|
|
/* If this is the line with the prompt, we might need to
|
|
compensate for invisible characters in the new line. Do
|
|
this only if there is not more than one new line (which
|
|
implies that we completely overwrite the old visible line)
|
|
and the new line is shorter than the old. Make sure we are
|
|
at the end of the new line before clearing. */
|
|
if (linenum == 0 &&
|
|
inv_botlin == 0 && _rl_last_c_pos == out &&
|
|
(wrap_offset > visible_wrap_offset) &&
|
|
(_rl_last_c_pos < visible_first_line_len))
|
|
{
|
|
nleft = _rl_screenwidth + wrap_offset - _rl_last_c_pos;
|
|
if (nleft)
|
|
_rl_clear_to_eol (nleft);
|
|
}
|
|
|
|
/* Since the new first line is now visible, save its length. */
|
|
if (linenum == 0)
|
|
visible_first_line_len = (inv_botlin > 0) ? inv_lbreaks[1] : out - wrap_offset;
|
|
}
|
|
|
|
/* We may have deleted some lines. If so, clear the left over
|
|
blank ones at the bottom out. */
|
|
if (_rl_vis_botlin > inv_botlin)
|
|
{
|
|
char *tt;
|
|
for (; linenum <= _rl_vis_botlin; linenum++)
|
|
{
|
|
tt = VIS_CHARS (linenum);
|
|
_rl_move_vert (linenum);
|
|
_rl_move_cursor_relative (0, tt);
|
|
_rl_clear_to_eol
|
|
((linenum == _rl_vis_botlin) ? strlen (tt) : _rl_screenwidth);
|
|
}
|
|
}
|
|
_rl_vis_botlin = inv_botlin;
|
|
|
|
/* CHANGED_SCREEN_LINE is set to 1 if we have moved to a
|
|
different screen line during this redisplay. */
|
|
changed_screen_line = _rl_last_v_pos != cursor_linenum;
|
|
if (changed_screen_line)
|
|
{
|
|
_rl_move_vert (cursor_linenum);
|
|
/* If we moved up to the line with the prompt using _rl_term_up,
|
|
the physical cursor position on the screen stays the same,
|
|
but the buffer position needs to be adjusted to account
|
|
for invisible characters. */
|
|
if (cursor_linenum == 0 && wrap_offset)
|
|
_rl_last_c_pos += wrap_offset;
|
|
}
|
|
|
|
/* We have to reprint the prompt if it contains invisible
|
|
characters, since it's not generally OK to just reprint
|
|
the characters from the current cursor position. But we
|
|
only need to reprint it if the cursor is before the last
|
|
invisible character in the prompt string. */
|
|
nleft = prompt_visible_length + wrap_offset;
|
|
if (cursor_linenum == 0 && wrap_offset > 0 && _rl_last_c_pos > 0 &&
|
|
_rl_last_c_pos <= prompt_last_invisible && local_prompt)
|
|
{
|
|
#if defined (__MSDOS__)
|
|
putc ('\r', rl_outstream);
|
|
#else
|
|
if (_rl_term_cr)
|
|
tputs (_rl_term_cr, 1, _rl_output_character_function);
|
|
#endif
|
|
_rl_output_some_chars (local_prompt, nleft);
|
|
_rl_last_c_pos = nleft;
|
|
}
|
|
|
|
/* Where on that line? And where does that line start
|
|
in the buffer? */
|
|
pos = inv_lbreaks[cursor_linenum];
|
|
/* nleft == number of characters in the line buffer between the
|
|
start of the line and the cursor position. */
|
|
nleft = c_pos - pos;
|
|
|
|
/* Since _rl_backspace() doesn't know about invisible characters in the
|
|
prompt, and there's no good way to tell it, we compensate for
|
|
those characters here and call _rl_backspace() directly. */
|
|
if (wrap_offset && cursor_linenum == 0 && nleft < _rl_last_c_pos)
|
|
{
|
|
_rl_backspace (_rl_last_c_pos - nleft);
|
|
_rl_last_c_pos = nleft;
|
|
}
|
|
|
|
if (nleft != _rl_last_c_pos)
|
|
_rl_move_cursor_relative (nleft, &invisible_line[pos]);
|
|
}
|
|
}
|
|
else /* Do horizontal scrolling. */
|
|
{
|
|
#define M_OFFSET(margin, offset) ((margin) == 0 ? offset : 0)
|
|
int lmargin, ndisp, nleft, phys_c_pos, t;
|
|
|
|
/* Always at top line. */
|
|
_rl_last_v_pos = 0;
|
|
|
|
/* Compute where in the buffer the displayed line should start. This
|
|
will be LMARGIN. */
|
|
|
|
/* The number of characters that will be displayed before the cursor. */
|
|
ndisp = c_pos - wrap_offset;
|
|
nleft = prompt_visible_length + wrap_offset;
|
|
/* Where the new cursor position will be on the screen. This can be
|
|
longer than SCREENWIDTH; if it is, lmargin will be adjusted. */
|
|
phys_c_pos = c_pos - (last_lmargin ? last_lmargin : wrap_offset);
|
|
t = _rl_screenwidth / 3;
|
|
|
|
/* If the number of characters had already exceeded the screenwidth,
|
|
last_lmargin will be > 0. */
|
|
|
|
/* If the number of characters to be displayed is more than the screen
|
|
width, compute the starting offset so that the cursor is about
|
|
two-thirds of the way across the screen. */
|
|
if (phys_c_pos > _rl_screenwidth - 2)
|
|
{
|
|
lmargin = c_pos - (2 * t);
|
|
if (lmargin < 0)
|
|
lmargin = 0;
|
|
/* If the left margin would be in the middle of a prompt with
|
|
invisible characters, don't display the prompt at all. */
|
|
if (wrap_offset && lmargin > 0 && lmargin < nleft)
|
|
lmargin = nleft;
|
|
}
|
|
else if (ndisp < _rl_screenwidth - 2) /* XXX - was -1 */
|
|
lmargin = 0;
|
|
else if (phys_c_pos < 1)
|
|
{
|
|
/* If we are moving back towards the beginning of the line and
|
|
the last margin is no longer correct, compute a new one. */
|
|
lmargin = ((c_pos - 1) / t) * t; /* XXX */
|
|
if (wrap_offset && lmargin > 0 && lmargin < nleft)
|
|
lmargin = nleft;
|
|
}
|
|
else
|
|
lmargin = last_lmargin;
|
|
|
|
/* If the first character on the screen isn't the first character
|
|
in the display line, indicate this with a special character. */
|
|
if (lmargin > 0)
|
|
line[lmargin] = '<';
|
|
|
|
/* If SCREENWIDTH characters starting at LMARGIN do not encompass
|
|
the whole line, indicate that with a special character at the
|
|
right edge of the screen. If LMARGIN is 0, we need to take the
|
|
wrap offset into account. */
|
|
t = lmargin + M_OFFSET (lmargin, wrap_offset) + _rl_screenwidth;
|
|
if (t < out)
|
|
line[t - 1] = '>';
|
|
|
|
if (!rl_display_fixed || forced_display || lmargin != last_lmargin)
|
|
{
|
|
forced_display = 0;
|
|
update_line (&visible_line[last_lmargin],
|
|
&invisible_line[lmargin],
|
|
0,
|
|
_rl_screenwidth + visible_wrap_offset,
|
|
_rl_screenwidth + (lmargin ? 0 : wrap_offset),
|
|
0);
|
|
|
|
/* If the visible new line is shorter than the old, but the number
|
|
of invisible characters is greater, and we are at the end of
|
|
the new line, we need to clear to eol. */
|
|
t = _rl_last_c_pos - M_OFFSET (lmargin, wrap_offset);
|
|
if ((M_OFFSET (lmargin, wrap_offset) > visible_wrap_offset) &&
|
|
(_rl_last_c_pos == out) &&
|
|
t < visible_first_line_len)
|
|
{
|
|
nleft = _rl_screenwidth - t;
|
|
_rl_clear_to_eol (nleft);
|
|
}
|
|
visible_first_line_len = out - lmargin - M_OFFSET (lmargin, wrap_offset);
|
|
if (visible_first_line_len > _rl_screenwidth)
|
|
visible_first_line_len = _rl_screenwidth;
|
|
|
|
_rl_move_cursor_relative (c_pos - lmargin, &invisible_line[lmargin]);
|
|
last_lmargin = lmargin;
|
|
}
|
|
}
|
|
fflush (rl_outstream);
|
|
|
|
/* Swap visible and non-visible lines. */
|
|
{
|
|
char *vtemp = visible_line;
|
|
int *itemp = vis_lbreaks, ntemp = vis_lbsize;
|
|
|
|
visible_line = invisible_line;
|
|
invisible_line = vtemp;
|
|
|
|
vis_lbreaks = inv_lbreaks;
|
|
inv_lbreaks = itemp;
|
|
|
|
vis_lbsize = inv_lbsize;
|
|
inv_lbsize = ntemp;
|
|
|
|
rl_display_fixed = 0;
|
|
/* If we are displaying on a single line, and last_lmargin is > 0, we
|
|
are not displaying any invisible characters, so set visible_wrap_offset
|
|
to 0. */
|
|
if (_rl_horizontal_scroll_mode && last_lmargin)
|
|
visible_wrap_offset = 0;
|
|
else
|
|
visible_wrap_offset = wrap_offset;
|
|
}
|
|
}
|
|
|
|
/* PWP: update_line() is based on finding the middle difference of each
|
|
line on the screen; vis:
|
|
|
|
/old first difference
|
|
/beginning of line | /old last same /old EOL
|
|
v v v v
|
|
old: eddie> Oh, my little gruntle-buggy is to me, as lurgid as
|
|
new: eddie> Oh, my little buggy says to me, as lurgid as
|
|
^ ^ ^ ^
|
|
\beginning of line | \new last same \new end of line
|
|
\new first difference
|
|
|
|
All are character pointers for the sake of speed. Special cases for
|
|
no differences, as well as for end of line additions must be handled.
|
|
|
|
Could be made even smarter, but this works well enough */
|
|
static void
|
|
update_line (old, new, current_line, omax, nmax, inv_botlin)
|
|
register char *old, *new;
|
|
int current_line, omax, nmax, inv_botlin;
|
|
{
|
|
register char *ofd, *ols, *oe, *nfd, *nls, *ne;
|
|
int temp, lendiff, wsatend, od, nd;
|
|
int current_invis_chars;
|
|
|
|
/* If we're at the right edge of a terminal that supports xn, we're
|
|
ready to wrap around, so do so. This fixes problems with knowing
|
|
the exact cursor position and cut-and-paste with certain terminal
|
|
emulators. In this calculation, TEMP is the physical screen
|
|
position of the cursor. */
|
|
temp = _rl_last_c_pos - W_OFFSET(_rl_last_v_pos, visible_wrap_offset);
|
|
if (temp == _rl_screenwidth && _rl_term_autowrap && !_rl_horizontal_scroll_mode
|
|
&& _rl_last_v_pos == current_line - 1)
|
|
{
|
|
if (new[0])
|
|
putc (new[0], rl_outstream);
|
|
else
|
|
putc (' ', rl_outstream);
|
|
_rl_last_c_pos = 1; /* XXX */
|
|
_rl_last_v_pos++;
|
|
if (old[0] && new[0])
|
|
old[0] = new[0];
|
|
}
|
|
|
|
/* Find first difference. */
|
|
for (ofd = old, nfd = new;
|
|
(ofd - old < omax) && *ofd && (*ofd == *nfd);
|
|
ofd++, nfd++)
|
|
;
|
|
|
|
/* Move to the end of the screen line. ND and OD are used to keep track
|
|
of the distance between ne and new and oe and old, respectively, to
|
|
move a subtraction out of each loop. */
|
|
for (od = ofd - old, oe = ofd; od < omax && *oe; oe++, od++);
|
|
for (nd = nfd - new, ne = nfd; nd < nmax && *ne; ne++, nd++);
|
|
|
|
/* If no difference, continue to next line. */
|
|
if (ofd == oe && nfd == ne)
|
|
return;
|
|
|
|
wsatend = 1; /* flag for trailing whitespace */
|
|
ols = oe - 1; /* find last same */
|
|
nls = ne - 1;
|
|
while ((ols > ofd) && (nls > nfd) && (*ols == *nls))
|
|
{
|
|
if (*ols != ' ')
|
|
wsatend = 0;
|
|
ols--;
|
|
nls--;
|
|
}
|
|
|
|
if (wsatend)
|
|
{
|
|
ols = oe;
|
|
nls = ne;
|
|
}
|
|
else if (*ols != *nls)
|
|
{
|
|
if (*ols) /* don't step past the NUL */
|
|
ols++;
|
|
if (*nls)
|
|
nls++;
|
|
}
|
|
|
|
/* count of invisible characters in the current invisible line. */
|
|
current_invis_chars = W_OFFSET (current_line, wrap_offset);
|
|
if (_rl_last_v_pos != current_line)
|
|
{
|
|
_rl_move_vert (current_line);
|
|
if (current_line == 0 && visible_wrap_offset)
|
|
_rl_last_c_pos += visible_wrap_offset;
|
|
}
|
|
|
|
/* If this is the first line and there are invisible characters in the
|
|
prompt string, and the prompt string has not changed, and the current
|
|
cursor position is before the last invisible character in the prompt,
|
|
and the index of the character to move to is past the end of the prompt
|
|
string, then redraw the entire prompt string. We can only do this
|
|
reliably if the terminal supports a `cr' capability.
|
|
|
|
This is not an efficiency hack -- there is a problem with redrawing
|
|
portions of the prompt string if they contain terminal escape
|
|
sequences (like drawing the `unbold' sequence without a corresponding
|
|
`bold') that manifests itself on certain terminals. */
|
|
|
|
lendiff = local_prompt ? strlen (local_prompt) : 0;
|
|
od = ofd - old; /* index of first difference in visible line */
|
|
if (current_line == 0 && !_rl_horizontal_scroll_mode &&
|
|
_rl_term_cr && lendiff > prompt_visible_length && _rl_last_c_pos > 0 &&
|
|
od >= lendiff && _rl_last_c_pos <= prompt_last_invisible)
|
|
{
|
|
#if defined (__MSDOS__)
|
|
putc ('\r', rl_outstream);
|
|
#else
|
|
tputs (_rl_term_cr, 1, _rl_output_character_function);
|
|
#endif
|
|
_rl_output_some_chars (local_prompt, lendiff);
|
|
_rl_last_c_pos = lendiff;
|
|
}
|
|
|
|
_rl_move_cursor_relative (od, old);
|
|
|
|
/* if (len (new) > len (old)) */
|
|
lendiff = (nls - nfd) - (ols - ofd);
|
|
|
|
/* If we are changing the number of invisible characters in a line, and
|
|
the spot of first difference is before the end of the invisible chars,
|
|
lendiff needs to be adjusted. */
|
|
if (current_line == 0 && !_rl_horizontal_scroll_mode &&
|
|
current_invis_chars != visible_wrap_offset)
|
|
lendiff += visible_wrap_offset - current_invis_chars;
|
|
|
|
/* Insert (diff (len (old), len (new)) ch. */
|
|
temp = ne - nfd;
|
|
if (lendiff > 0)
|
|
{
|
|
/* Non-zero if we're increasing the number of lines. */
|
|
int gl = current_line >= _rl_vis_botlin && inv_botlin > _rl_vis_botlin;
|
|
/* Sometimes it is cheaper to print the characters rather than
|
|
use the terminal's capabilities. If we're growing the number
|
|
of lines, make sure we actually cause the new line to wrap
|
|
around on auto-wrapping terminals. */
|
|
if (_rl_terminal_can_insert && ((2 * temp) >= lendiff || _rl_term_IC) && (!_rl_term_autowrap || !gl))
|
|
{
|
|
/* If lendiff > prompt_visible_length and _rl_last_c_pos == 0 and
|
|
_rl_horizontal_scroll_mode == 1, inserting the characters with
|
|
_rl_term_IC or _rl_term_ic will screw up the screen because of the
|
|
invisible characters. We need to just draw them. */
|
|
if (*ols && (!_rl_horizontal_scroll_mode || _rl_last_c_pos > 0 ||
|
|
lendiff <= prompt_visible_length || !current_invis_chars))
|
|
{
|
|
insert_some_chars (nfd, lendiff);
|
|
_rl_last_c_pos += lendiff;
|
|
}
|
|
else if (*ols == 0)
|
|
{
|
|
/* At the end of a line the characters do not have to
|
|
be "inserted". They can just be placed on the screen. */
|
|
/* However, this screws up the rest of this block, which
|
|
assumes you've done the insert because you can. */
|
|
_rl_output_some_chars (nfd, lendiff);
|
|
_rl_last_c_pos += lendiff;
|
|
}
|
|
else
|
|
{
|
|
/* We have horizontal scrolling and we are not inserting at
|
|
the end. We have invisible characters in this line. This
|
|
is a dumb update. */
|
|
_rl_output_some_chars (nfd, temp);
|
|
_rl_last_c_pos += temp;
|
|
return;
|
|
}
|
|
/* Copy (new) chars to screen from first diff to last match. */
|
|
temp = nls - nfd;
|
|
if ((temp - lendiff) > 0)
|
|
{
|
|
_rl_output_some_chars (nfd + lendiff, temp - lendiff);
|
|
_rl_last_c_pos += temp - lendiff;
|
|
}
|
|
}
|
|
else
|
|
{
|
|
/* cannot insert chars, write to EOL */
|
|
_rl_output_some_chars (nfd, temp);
|
|
_rl_last_c_pos += temp;
|
|
}
|
|
}
|
|
else /* Delete characters from line. */
|
|
{
|
|
/* If possible and inexpensive to use terminal deletion, then do so. */
|
|
if (_rl_term_dc && (2 * temp) >= -lendiff)
|
|
{
|
|
/* If all we're doing is erasing the invisible characters in the
|
|
prompt string, don't bother. It screws up the assumptions
|
|
about what's on the screen. */
|
|
if (_rl_horizontal_scroll_mode && _rl_last_c_pos == 0 &&
|
|
-lendiff == visible_wrap_offset)
|
|
lendiff = 0;
|
|
|
|
if (lendiff)
|
|
delete_chars (-lendiff); /* delete (diff) characters */
|
|
|
|
/* Copy (new) chars to screen from first diff to last match */
|
|
temp = nls - nfd;
|
|
if (temp > 0)
|
|
{
|
|
_rl_output_some_chars (nfd, temp);
|
|
_rl_last_c_pos += temp;
|
|
}
|
|
}
|
|
/* Otherwise, print over the existing material. */
|
|
else
|
|
{
|
|
if (temp > 0)
|
|
{
|
|
_rl_output_some_chars (nfd, temp);
|
|
_rl_last_c_pos += temp;
|
|
}
|
|
lendiff = (oe - old) - (ne - new);
|
|
if (lendiff)
|
|
{
|
|
if (_rl_term_autowrap && current_line < inv_botlin)
|
|
space_to_eol (lendiff);
|
|
else
|
|
_rl_clear_to_eol (lendiff);
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
/* Tell the update routines that we have moved onto a new (empty) line. */
|
|
int
|
|
rl_on_new_line ()
|
|
{
|
|
if (visible_line)
|
|
visible_line[0] = '\0';
|
|
|
|
_rl_last_c_pos = _rl_last_v_pos = 0;
|
|
_rl_vis_botlin = last_lmargin = 0;
|
|
if (vis_lbreaks)
|
|
vis_lbreaks[0] = vis_lbreaks[1] = 0;
|
|
visible_wrap_offset = 0;
|
|
return 0;
|
|
}
|
|
|
|
/* Tell the update routines that we have moved onto a new line with the
|
|
prompt already displayed. Code originally from the version of readline
|
|
distributed with CLISP. */
|
|
int
|
|
rl_on_new_line_with_prompt ()
|
|
{
|
|
int prompt_size, i, l, real_screenwidth, newlines;
|
|
char *prompt_last_line;
|
|
|
|
/* Initialize visible_line and invisible_line to ensure that they can hold
|
|
the already-displayed prompt. */
|
|
prompt_size = strlen (rl_prompt) + 1;
|
|
init_line_structures (prompt_size);
|
|
|
|
/* Make sure the line structures hold the already-displayed prompt for
|
|
redisplay. */
|
|
strcpy (visible_line, rl_prompt);
|
|
strcpy (invisible_line, rl_prompt);
|
|
|
|
/* If the prompt contains newlines, take the last tail. */
|
|
prompt_last_line = strrchr (rl_prompt, '\n');
|
|
if (!prompt_last_line)
|
|
prompt_last_line = rl_prompt;
|
|
|
|
l = strlen (prompt_last_line);
|
|
_rl_last_c_pos = l;
|
|
|
|
/* Dissect prompt_last_line into screen lines. Note that here we have
|
|
to use the real screenwidth. Readline's notion of screenwidth might be
|
|
one less, see terminal.c. */
|
|
real_screenwidth = _rl_screenwidth + (_rl_term_autowrap ? 0 : 1);
|
|
_rl_last_v_pos = l / real_screenwidth;
|
|
/* If the prompt length is a multiple of real_screenwidth, we don't know
|
|
whether the cursor is at the end of the last line, or already at the
|
|
beginning of the next line. Output a newline just to be safe. */
|
|
if (l > 0 && (l % real_screenwidth) == 0)
|
|
_rl_output_some_chars ("\n", 1);
|
|
last_lmargin = 0;
|
|
|
|
newlines = 0; i = 0;
|
|
while (i <= l)
|
|
{
|
|
_rl_vis_botlin = newlines;
|
|
vis_lbreaks[newlines++] = i;
|
|
i += real_screenwidth;
|
|
}
|
|
vis_lbreaks[newlines] = l;
|
|
visible_wrap_offset = 0;
|
|
|
|
return 0;
|
|
}
|
|
|
|
/* Actually update the display, period. */
|
|
int
|
|
rl_forced_update_display ()
|
|
{
|
|
if (visible_line)
|
|
{
|
|
register char *temp = visible_line;
|
|
|
|
while (*temp)
|
|
*temp++ = '\0';
|
|
}
|
|
rl_on_new_line ();
|
|
forced_display++;
|
|
(*rl_redisplay_function) ();
|
|
return 0;
|
|
}
|
|
|
|
/* Move the cursor from _rl_last_c_pos to NEW, which are buffer indices.
|
|
DATA is the contents of the screen line of interest; i.e., where
|
|
the movement is being done. */
|
|
void
|
|
_rl_move_cursor_relative (new, data)
|
|
int new;
|
|
const char *data;
|
|
{
|
|
register int i;
|
|
|
|
/* If we don't have to do anything, then return. */
|
|
if (_rl_last_c_pos == new) return;
|
|
|
|
/* It may be faster to output a CR, and then move forwards instead
|
|
of moving backwards. */
|
|
/* i == current physical cursor position. */
|
|
i = _rl_last_c_pos - W_OFFSET(_rl_last_v_pos, visible_wrap_offset);
|
|
if (new == 0 || CR_FASTER (new, _rl_last_c_pos) ||
|
|
(_rl_term_autowrap && i == _rl_screenwidth))
|
|
{
|
|
#if defined (__MSDOS__)
|
|
putc ('\r', rl_outstream);
|
|
#else
|
|
tputs (_rl_term_cr, 1, _rl_output_character_function);
|
|
#endif /* !__MSDOS__ */
|
|
_rl_last_c_pos = 0;
|
|
}
|
|
|
|
if (_rl_last_c_pos < new)
|
|
{
|
|
/* Move the cursor forward. We do it by printing the command
|
|
to move the cursor forward if there is one, else print that
|
|
portion of the output buffer again. Which is cheaper? */
|
|
|
|
/* The above comment is left here for posterity. It is faster
|
|
to print one character (non-control) than to print a control
|
|
sequence telling the terminal to move forward one character.
|
|
That kind of control is for people who don't know what the
|
|
data is underneath the cursor. */
|
|
#if defined (HACK_TERMCAP_MOTION)
|
|
if (_rl_term_forward_char)
|
|
for (i = _rl_last_c_pos; i < new; i++)
|
|
tputs (_rl_term_forward_char, 1, _rl_output_character_function);
|
|
else
|
|
for (i = _rl_last_c_pos; i < new; i++)
|
|
putc (data[i], rl_outstream);
|
|
#else
|
|
for (i = _rl_last_c_pos; i < new; i++)
|
|
putc (data[i], rl_outstream);
|
|
#endif /* HACK_TERMCAP_MOTION */
|
|
}
|
|
else if (_rl_last_c_pos > new)
|
|
_rl_backspace (_rl_last_c_pos - new);
|
|
_rl_last_c_pos = new;
|
|
}
|
|
|
|
/* PWP: move the cursor up or down. */
|
|
void
|
|
_rl_move_vert (to)
|
|
int to;
|
|
{
|
|
register int delta, i;
|
|
|
|
if (_rl_last_v_pos == to || to > _rl_screenheight)
|
|
return;
|
|
|
|
if ((delta = to - _rl_last_v_pos) > 0)
|
|
{
|
|
for (i = 0; i < delta; i++)
|
|
putc ('\n', rl_outstream);
|
|
#if defined (__MSDOS__)
|
|
putc ('\r', rl_outstream);
|
|
#else
|
|
tputs (_rl_term_cr, 1, _rl_output_character_function);
|
|
#endif
|
|
_rl_last_c_pos = 0;
|
|
}
|
|
else
|
|
{ /* delta < 0 */
|
|
if (_rl_term_up && *_rl_term_up)
|
|
for (i = 0; i < -delta; i++)
|
|
tputs (_rl_term_up, 1, _rl_output_character_function);
|
|
}
|
|
|
|
_rl_last_v_pos = to; /* Now TO is here */
|
|
}
|
|
|
|
/* Physically print C on rl_outstream. This is for functions which know
|
|
how to optimize the display. Return the number of characters output. */
|
|
int
|
|
rl_show_char (c)
|
|
int c;
|
|
{
|
|
int n = 1;
|
|
if (META_CHAR (c) && (_rl_output_meta_chars == 0))
|
|
{
|
|
fprintf (rl_outstream, "M-");
|
|
n += 2;
|
|
c = UNMETA (c);
|
|
}
|
|
|
|
#if defined (DISPLAY_TABS)
|
|
if ((CTRL_CHAR (c) && c != '\t') || c == RUBOUT)
|
|
#else
|
|
if (CTRL_CHAR (c) || c == RUBOUT)
|
|
#endif /* !DISPLAY_TABS */
|
|
{
|
|
fprintf (rl_outstream, "C-");
|
|
n += 2;
|
|
c = CTRL_CHAR (c) ? UNCTRL (c) : '?';
|
|
}
|
|
|
|
putc (c, rl_outstream);
|
|
fflush (rl_outstream);
|
|
return n;
|
|
}
|
|
|
|
int
|
|
rl_character_len (c, pos)
|
|
register int c, pos;
|
|
{
|
|
unsigned char uc;
|
|
|
|
uc = (unsigned char)c;
|
|
|
|
if (META_CHAR (uc))
|
|
return ((_rl_output_meta_chars == 0) ? 4 : 1);
|
|
|
|
if (uc == '\t')
|
|
{
|
|
#if defined (DISPLAY_TABS)
|
|
return (((pos | 7) + 1) - pos);
|
|
#else
|
|
return (2);
|
|
#endif /* !DISPLAY_TABS */
|
|
}
|
|
|
|
if (CTRL_CHAR (c) || c == RUBOUT)
|
|
return (2);
|
|
|
|
return ((isprint (uc)) ? 1 : 2);
|
|
}
|
|
|
|
/* How to print things in the "echo-area". The prompt is treated as a
|
|
mini-modeline. */
|
|
|
|
#if defined (USE_VARARGS)
|
|
int
|
|
#if defined (PREFER_STDARG)
|
|
rl_message (const char *format, ...)
|
|
#else
|
|
rl_message (va_alist)
|
|
va_dcl
|
|
#endif
|
|
{
|
|
va_list args;
|
|
#if defined (PREFER_VARARGS)
|
|
char *format;
|
|
#endif
|
|
|
|
#if defined (PREFER_STDARG)
|
|
va_start (args, format);
|
|
#else
|
|
va_start (args);
|
|
format = va_arg (args, char *);
|
|
#endif
|
|
|
|
vsprintf (msg_buf, format, args);
|
|
va_end (args);
|
|
|
|
rl_display_prompt = msg_buf;
|
|
(*rl_redisplay_function) ();
|
|
return 0;
|
|
}
|
|
#else /* !USE_VARARGS */
|
|
int
|
|
rl_message (format, arg1, arg2)
|
|
char *format;
|
|
{
|
|
sprintf (msg_buf, format, arg1, arg2);
|
|
rl_display_prompt = msg_buf;
|
|
(*rl_redisplay_function) ();
|
|
return 0;
|
|
}
|
|
#endif /* !USE_VARARGS */
|
|
|
|
/* How to clear things from the "echo-area". */
|
|
int
|
|
rl_clear_message ()
|
|
{
|
|
rl_display_prompt = rl_prompt;
|
|
(*rl_redisplay_function) ();
|
|
return 0;
|
|
}
|
|
|
|
int
|
|
rl_reset_line_state ()
|
|
{
|
|
rl_on_new_line ();
|
|
|
|
rl_display_prompt = rl_prompt ? rl_prompt : "";
|
|
forced_display = 1;
|
|
return 0;
|
|
}
|
|
|
|
static char *saved_local_prompt;
|
|
static char *saved_local_prefix;
|
|
static int saved_last_invisible;
|
|
static int saved_visible_length;
|
|
|
|
void
|
|
rl_save_prompt ()
|
|
{
|
|
saved_local_prompt = local_prompt;
|
|
saved_local_prefix = local_prompt_prefix;
|
|
saved_last_invisible = prompt_last_invisible;
|
|
saved_visible_length = prompt_visible_length;
|
|
|
|
local_prompt = local_prompt_prefix = (char *)0;
|
|
prompt_last_invisible = prompt_visible_length = 0;
|
|
}
|
|
|
|
void
|
|
rl_restore_prompt ()
|
|
{
|
|
FREE (local_prompt);
|
|
FREE (local_prompt_prefix);
|
|
|
|
local_prompt = saved_local_prompt;
|
|
local_prompt_prefix = saved_local_prefix;
|
|
prompt_last_invisible = saved_last_invisible;
|
|
prompt_visible_length = saved_visible_length;
|
|
}
|
|
|
|
char *
|
|
_rl_make_prompt_for_search (pchar)
|
|
int pchar;
|
|
{
|
|
int len;
|
|
char *pmt;
|
|
|
|
rl_save_prompt ();
|
|
|
|
if (saved_local_prompt == 0)
|
|
{
|
|
len = (rl_prompt && *rl_prompt) ? strlen (rl_prompt) : 0;
|
|
pmt = xmalloc (len + 2);
|
|
if (len)
|
|
strcpy (pmt, rl_prompt);
|
|
pmt[len] = pchar;
|
|
pmt[len+1] = '\0';
|
|
}
|
|
else
|
|
{
|
|
len = *saved_local_prompt ? strlen (saved_local_prompt) : 0;
|
|
pmt = xmalloc (len + 2);
|
|
if (len)
|
|
strcpy (pmt, saved_local_prompt);
|
|
pmt[len] = pchar;
|
|
pmt[len+1] = '\0';
|
|
local_prompt = savestring (pmt);
|
|
prompt_last_invisible = saved_last_invisible;
|
|
prompt_visible_length = saved_visible_length + 1;
|
|
}
|
|
return pmt;
|
|
}
|
|
|
|
/* Quick redisplay hack when erasing characters at the end of the line. */
|
|
void
|
|
_rl_erase_at_end_of_line (l)
|
|
int l;
|
|
{
|
|
register int i;
|
|
|
|
_rl_backspace (l);
|
|
for (i = 0; i < l; i++)
|
|
putc (' ', rl_outstream);
|
|
_rl_backspace (l);
|
|
for (i = 0; i < l; i++)
|
|
visible_line[--_rl_last_c_pos] = '\0';
|
|
rl_display_fixed++;
|
|
}
|
|
|
|
/* Clear to the end of the line. COUNT is the minimum
|
|
number of character spaces to clear, */
|
|
void
|
|
_rl_clear_to_eol (count)
|
|
int count;
|
|
{
|
|
if (_rl_term_clreol)
|
|
tputs (_rl_term_clreol, 1, _rl_output_character_function);
|
|
else if (count)
|
|
space_to_eol (count);
|
|
}
|
|
|
|
/* Clear to the end of the line using spaces. COUNT is the minimum
|
|
number of character spaces to clear, */
|
|
static void
|
|
space_to_eol (count)
|
|
int count;
|
|
{
|
|
register int i;
|
|
|
|
for (i = 0; i < count; i++)
|
|
putc (' ', rl_outstream);
|
|
|
|
_rl_last_c_pos += count;
|
|
}
|
|
|
|
void
|
|
_rl_clear_screen ()
|
|
{
|
|
if (_rl_term_clrpag)
|
|
tputs (_rl_term_clrpag, 1, _rl_output_character_function);
|
|
else
|
|
rl_crlf ();
|
|
}
|
|
|
|
/* Insert COUNT characters from STRING to the output stream. */
|
|
static void
|
|
insert_some_chars (string, count)
|
|
char *string;
|
|
int count;
|
|
{
|
|
/* If IC is defined, then we do not have to "enter" insert mode. */
|
|
if (_rl_term_IC)
|
|
{
|
|
char *buffer;
|
|
buffer = tgoto (_rl_term_IC, 0, count);
|
|
tputs (buffer, 1, _rl_output_character_function);
|
|
_rl_output_some_chars (string, count);
|
|
}
|
|
else
|
|
{
|
|
register int i;
|
|
|
|
/* If we have to turn on insert-mode, then do so. */
|
|
if (_rl_term_im && *_rl_term_im)
|
|
tputs (_rl_term_im, 1, _rl_output_character_function);
|
|
|
|
/* If there is a special command for inserting characters, then
|
|
use that first to open up the space. */
|
|
if (_rl_term_ic && *_rl_term_ic)
|
|
{
|
|
for (i = count; i--; )
|
|
tputs (_rl_term_ic, 1, _rl_output_character_function);
|
|
}
|
|
|
|
/* Print the text. */
|
|
_rl_output_some_chars (string, count);
|
|
|
|
/* If there is a string to turn off insert mode, we had best use
|
|
it now. */
|
|
if (_rl_term_ei && *_rl_term_ei)
|
|
tputs (_rl_term_ei, 1, _rl_output_character_function);
|
|
}
|
|
}
|
|
|
|
/* Delete COUNT characters from the display line. */
|
|
static void
|
|
delete_chars (count)
|
|
int count;
|
|
{
|
|
if (count > _rl_screenwidth) /* XXX */
|
|
return;
|
|
|
|
if (_rl_term_DC && *_rl_term_DC)
|
|
{
|
|
char *buffer;
|
|
buffer = tgoto (_rl_term_DC, count, count);
|
|
tputs (buffer, count, _rl_output_character_function);
|
|
}
|
|
else
|
|
{
|
|
if (_rl_term_dc && *_rl_term_dc)
|
|
while (count--)
|
|
tputs (_rl_term_dc, 1, _rl_output_character_function);
|
|
}
|
|
}
|
|
|
|
void
|
|
_rl_update_final ()
|
|
{
|
|
int full_lines;
|
|
|
|
full_lines = 0;
|
|
/* If the cursor is the only thing on an otherwise-blank last line,
|
|
compensate so we don't print an extra CRLF. */
|
|
if (_rl_vis_botlin && _rl_last_c_pos == 0 &&
|
|
visible_line[vis_lbreaks[_rl_vis_botlin]] == 0)
|
|
{
|
|
_rl_vis_botlin--;
|
|
full_lines = 1;
|
|
}
|
|
_rl_move_vert (_rl_vis_botlin);
|
|
/* If we've wrapped lines, remove the final xterm line-wrap flag. */
|
|
if (full_lines && _rl_term_autowrap && (VIS_LLEN(_rl_vis_botlin) == _rl_screenwidth))
|
|
{
|
|
char *last_line;
|
|
#if 0
|
|
last_line = &visible_line[inv_lbreaks[_rl_vis_botlin]];
|
|
#else
|
|
last_line = &visible_line[vis_lbreaks[_rl_vis_botlin]];
|
|
#endif
|
|
_rl_move_cursor_relative (_rl_screenwidth - 1, last_line);
|
|
_rl_clear_to_eol (0);
|
|
putc (last_line[_rl_screenwidth - 1], rl_outstream);
|
|
}
|
|
_rl_vis_botlin = 0;
|
|
rl_crlf ();
|
|
fflush (rl_outstream);
|
|
rl_display_fixed++;
|
|
}
|
|
|
|
/* Move to the start of the current line. */
|
|
static void
|
|
cr ()
|
|
{
|
|
if (_rl_term_cr)
|
|
{
|
|
#if defined (__MSDOS__)
|
|
putc ('\r', rl_outstream);
|
|
#else
|
|
tputs (_rl_term_cr, 1, _rl_output_character_function);
|
|
#endif
|
|
_rl_last_c_pos = 0;
|
|
}
|
|
}
|
|
|
|
/* Redraw the last line of a multi-line prompt that may possibly contain
|
|
terminal escape sequences. Called with the cursor at column 0 of the
|
|
line to draw the prompt on. */
|
|
static void
|
|
redraw_prompt (t)
|
|
char *t;
|
|
{
|
|
char *oldp, *oldl, *oldlprefix;
|
|
int oldlen, oldlast, oldplen, oldninvis;
|
|
|
|
/* Geez, I should make this a struct. */
|
|
oldp = rl_display_prompt;
|
|
oldl = local_prompt;
|
|
oldlprefix = local_prompt_prefix;
|
|
oldlen = prompt_visible_length;
|
|
oldplen = prompt_prefix_length;
|
|
oldlast = prompt_last_invisible;
|
|
oldninvis = prompt_invis_chars_first_line;
|
|
|
|
rl_display_prompt = t;
|
|
local_prompt = expand_prompt (t, &prompt_visible_length,
|
|
&prompt_last_invisible,
|
|
&prompt_invis_chars_first_line);
|
|
local_prompt_prefix = (char *)NULL;
|
|
rl_forced_update_display ();
|
|
|
|
rl_display_prompt = oldp;
|
|
local_prompt = oldl;
|
|
local_prompt_prefix = oldlprefix;
|
|
prompt_visible_length = oldlen;
|
|
prompt_prefix_length = oldplen;
|
|
prompt_last_invisible = oldlast;
|
|
prompt_invis_chars_first_line = oldninvis;
|
|
}
|
|
|
|
/* Redisplay the current line after a SIGWINCH is received. */
|
|
void
|
|
_rl_redisplay_after_sigwinch ()
|
|
{
|
|
char *t;
|
|
|
|
/* Clear the current line and put the cursor at column 0. Make sure
|
|
the right thing happens if we have wrapped to a new screen line. */
|
|
if (_rl_term_cr)
|
|
{
|
|
#if defined (__MSDOS__)
|
|
putc ('\r', rl_outstream);
|
|
#else
|
|
tputs (_rl_term_cr, 1, _rl_output_character_function);
|
|
#endif
|
|
_rl_last_c_pos = 0;
|
|
#if defined (__MSDOS__)
|
|
space_to_eol (_rl_screenwidth);
|
|
putc ('\r', rl_outstream);
|
|
#else
|
|
if (_rl_term_clreol)
|
|
tputs (_rl_term_clreol, 1, _rl_output_character_function);
|
|
else
|
|
{
|
|
space_to_eol (_rl_screenwidth);
|
|
tputs (_rl_term_cr, 1, _rl_output_character_function);
|
|
}
|
|
#endif
|
|
if (_rl_last_v_pos > 0)
|
|
_rl_move_vert (0);
|
|
}
|
|
else
|
|
rl_crlf ();
|
|
|
|
/* Redraw only the last line of a multi-line prompt. */
|
|
t = strrchr (rl_display_prompt, '\n');
|
|
if (t)
|
|
redraw_prompt (++t);
|
|
else
|
|
rl_forced_update_display ();
|
|
}
|
|
|
|
void
|
|
_rl_clean_up_for_exit ()
|
|
{
|
|
if (readline_echoing_p)
|
|
{
|
|
_rl_move_vert (_rl_vis_botlin);
|
|
_rl_vis_botlin = 0;
|
|
fflush (rl_outstream);
|
|
rl_restart_output (1, 0);
|
|
}
|
|
}
|
|
|
|
void
|
|
_rl_erase_entire_line ()
|
|
{
|
|
cr ();
|
|
_rl_clear_to_eol (0);
|
|
cr ();
|
|
fflush (rl_outstream);
|
|
}
|
|
|
|
/* return the `current display line' of the cursor -- the number of lines to
|
|
move up to get to the first screen line of the current readline line. */
|
|
int
|
|
_rl_current_display_line ()
|
|
{
|
|
int ret, nleft;
|
|
|
|
/* Find out whether or not there might be invisible characters in the
|
|
editing buffer. */
|
|
if (rl_display_prompt == rl_prompt)
|
|
nleft = _rl_last_c_pos - _rl_screenwidth - rl_visible_prompt_length;
|
|
else
|
|
nleft = _rl_last_c_pos - _rl_screenwidth;
|
|
|
|
if (nleft > 0)
|
|
ret = 1 + nleft / _rl_screenwidth;
|
|
else
|
|
ret = 0;
|
|
|
|
return ret;
|
|
}
|