| /* display.c -- readline redisplay facility. */ |
| |
| /* Copyright (C) 1987, 1989, 1992 Free Software Foundation, Inc. |
| |
| This file is part of the GNU Readline Library, a library for |
| reading lines of text with interactive input and history editing. |
| |
| The GNU Readline Library is free software; you can redistribute it |
| and/or modify it under the terms of the GNU General Public License |
| as published by the Free Software Foundation; either version 1, or |
| (at your option) any later version. |
| |
| The GNU Readline Library is distributed in the hope that it will be |
| useful, but WITHOUT ANY WARRANTY; without even the implied warranty |
| of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| GNU General Public License for more details. |
| |
| The GNU General Public License is often shipped with GNU software, and |
| is generally kept in a file called COPYING or LICENSE. If you do not |
| have a copy of the license, write to the Free Software Foundation, |
| 675 Mass Ave, Cambridge, MA 02139, USA. */ |
| #define READLINE_LIBRARY |
| |
| #if defined (HAVE_CONFIG_H) |
| # include <config.h> |
| #endif |
| |
| #include <sys/types.h> |
| |
| #if defined (HAVE_UNISTD_H) |
| # include <unistd.h> |
| #endif /* HAVE_UNISTD_H */ |
| |
| #include "posixstat.h" |
| |
| #if defined (HAVE_STDLIB_H) |
| # include <stdlib.h> |
| #else |
| # include "ansi_stdlib.h" |
| #endif /* HAVE_STDLIB_H */ |
| |
| #include <stdio.h> |
| |
| #if defined (__GO32__) |
| # include <go32.h> |
| # include <pc.h> |
| #endif /* __GO32__ */ |
| |
| /* System-specific feature definitions and include files. */ |
| #include "rldefs.h" |
| |
| /* Termcap library stuff. */ |
| #include "tcap.h" |
| |
| /* Some standard library routines. */ |
| #include "readline.h" |
| #include "history.h" |
| |
| #if !defined (strchr) && !defined (__STDC__) |
| extern char *strchr (), *strrchr (); |
| #endif /* !strchr && !__STDC__ */ |
| |
| /* Global and pseudo-global variables and functions |
| imported from readline.c. */ |
| extern char *rl_prompt; |
| extern int readline_echoing_p; |
| |
| extern int _rl_output_meta_chars; |
| extern int _rl_horizontal_scroll_mode; |
| extern int _rl_mark_modified_lines; |
| extern int _rl_prefer_visible_bell; |
| |
| /* Variables and functions imported from terminal.c */ |
| extern void _rl_output_some_chars (); |
| #ifdef _MINIX |
| extern void _rl_output_character_function (); |
| #else |
| extern int _rl_output_character_function (); |
| #endif |
| extern int _rl_backspace (); |
| |
| extern char *term_clreol, *term_clrpag; |
| extern char *term_im, *term_ic, *term_ei, *term_DC; |
| extern char *term_up, *term_dc, *term_cr, *term_IC; |
| extern int screenheight, screenwidth, screenchars; |
| extern int terminal_can_insert, _rl_term_autowrap; |
| |
| /* Pseudo-global functions (local to the readline library) exported |
| by this file. */ |
| void _rl_move_cursor_relative (), _rl_output_some_chars (); |
| void _rl_move_vert (); |
| void _rl_clear_to_eol (), _rl_clear_screen (); |
| |
| static void update_line (), space_to_eol (); |
| static void delete_chars (), insert_some_chars (); |
| static void cr (); |
| |
| static int *inv_lbreaks, *vis_lbreaks; |
| |
| extern char *xmalloc (), *xrealloc (); |
| |
| /* Heuristic used to decide whether it is faster to move from CUR to NEW |
| by backing up or outputting a carriage return and moving forward. */ |
| #define CR_FASTER(new, cur) (((new) + 1) < ((cur) - (new))) |
| |
| /* **************************************************************** */ |
| /* */ |
| /* Display stuff */ |
| /* */ |
| /* **************************************************************** */ |
| |
| /* This is the stuff that is hard for me. I never seem to write good |
| display routines in C. Let's see how I do this time. */ |
| |
| /* (PWP) Well... Good for a simple line updater, but totally ignores |
| the problems of input lines longer than the screen width. |
| |
| update_line and the code that calls it makes a multiple line, |
| automatically wrapping line update. Careful attention needs |
| to be paid to the vertical position variables. */ |
| |
| /* Keep two buffers; one which reflects the current contents of the |
| screen, and the other to draw what we think the new contents should |
| be. Then compare the buffers, and make whatever changes to the |
| screen itself that we should. Finally, make the buffer that we |
| just drew into be the one which reflects the current contents of the |
| screen, and place the cursor where it belongs. |
| |
| Commands that want to can fix the display themselves, and then let |
| this function know that the display has been fixed by setting the |
| RL_DISPLAY_FIXED variable. This is good for efficiency. */ |
| |
| /* Application-specific redisplay function. */ |
| VFunction *rl_redisplay_function = rl_redisplay; |
| |
| /* Global variables declared here. */ |
| /* What YOU turn on when you have handled all redisplay yourself. */ |
| int rl_display_fixed = 0; |
| |
| int _rl_suppress_redisplay = 0; |
| |
| /* The stuff that gets printed out before the actual text of the line. |
| This is usually pointing to rl_prompt. */ |
| char *rl_display_prompt = (char *)NULL; |
| |
| /* Pseudo-global variables declared here. */ |
| /* The visible cursor position. If you print some text, adjust this. */ |
| int _rl_last_c_pos = 0; |
| int _rl_last_v_pos = 0; |
| |
| /* Number of lines currently on screen minus 1. */ |
| int _rl_vis_botlin = 0; |
| |
| /* Variables used only in this file. */ |
| /* The last left edge of text that was displayed. This is used when |
| doing horizontal scrolling. It shifts in thirds of a screenwidth. */ |
| static int last_lmargin; |
| |
| /* The line display buffers. One is the line currently displayed on |
| the screen. The other is the line about to be displayed. */ |
| static char *visible_line = (char *)NULL; |
| static char *invisible_line = (char *)NULL; |
| |
| /* A buffer for `modeline' messages. */ |
| static char msg_buf[128]; |
| |
| /* Non-zero forces the redisplay even if we thought it was unnecessary. */ |
| static int forced_display; |
| |
| /* Default and initial buffer size. Can grow. */ |
| static int line_size = 1024; |
| |
| static char *local_prompt, *local_prompt_prefix; |
| static int visible_length, prefix_length; |
| |
| /* The number of invisible characters in the line currently being |
| displayed on the screen. */ |
| static int visible_wrap_offset; |
| |
| /* static so it can be shared between rl_redisplay and update_line */ |
| static int wrap_offset; |
| |
| /* The index of the last invisible_character in the prompt string. */ |
| static int last_invisible; |
| |
| /* The length (buffer offset) of the first line of the last (possibly |
| multi-line) buffer displayed on the screen. */ |
| static int visible_first_line_len; |
| |
| /* Expand the prompt string S and return the number of visible |
| characters in *LP, if LP is not null. This is currently more-or-less |
| a placeholder for expansion. LIP, if non-null is a place to store the |
| index of the last invisible character in ther eturned string. */ |
| |
| /* Current implementation: |
| \001 (^A) start non-visible characters |
| \002 (^B) end non-visible characters |
| all characters except \001 and \002 (following a \001) are copied to |
| the returned string; all characters except those between \001 and |
| \002 are assumed to be `visible'. */ |
| |
| static char * |
| expand_prompt (pmt, lp, lip) |
| char *pmt; |
| int *lp, *lip; |
| { |
| char *r, *ret, *p; |
| int l, rl, last, ignoring; |
| |
| /* Short-circuit if we can. */ |
| if (strchr (pmt, RL_PROMPT_START_IGNORE) == 0) |
| { |
| r = savestring (pmt); |
| if (lp) |
| *lp = strlen (r); |
| return r; |
| } |
| |
| l = strlen (pmt); |
| r = ret = xmalloc (l + 1); |
| |
| for (rl = ignoring = last = 0, p = pmt; p && *p; p++) |
| { |
| /* This code strips the invisible character string markers |
| RL_PROMPT_START_IGNORE and RL_PROMPT_END_IGNORE */ |
| if (*p == RL_PROMPT_START_IGNORE) |
| { |
| ignoring++; |
| continue; |
| } |
| else if (ignoring && *p == RL_PROMPT_END_IGNORE) |
| { |
| ignoring = 0; |
| last = r - ret - 1; |
| continue; |
| } |
| else |
| { |
| *r++ = *p; |
| if (!ignoring) |
| rl++; |
| } |
| } |
| |
| *r = '\0'; |
| if (lp) |
| *lp = rl; |
| if (lip) |
| *lip = last; |
| return ret; |
| } |
| |
| /* |
| * Expand the prompt string into the various display components, if |
| * necessary. |
| * |
| * local_prompt = expanded last line of string in rl_display_prompt |
| * (portion after the final newline) |
| * local_prompt_prefix = portion before last newline of rl_display_prompt, |
| * expanded via expand_prompt |
| * visible_length = number of visible characters in local_prompt |
| * prefix_length = number of visible characters in local_prompt_prefix |
| * |
| * This function is called once per call to readline(). It may also be |
| * called arbitrarily to expand the primary prompt. |
| * |
| * The return value is the number of visible characters on the last line |
| * of the (possibly multi-line) prompt. |
| */ |
| int |
| rl_expand_prompt (prompt) |
| char *prompt; |
| { |
| char *p, *t; |
| int c; |
| |
| /* Clear out any saved values. */ |
| if (local_prompt) |
| free (local_prompt); |
| if (local_prompt_prefix) |
| free (local_prompt_prefix); |
| local_prompt = local_prompt_prefix = (char *)0; |
| last_invisible = 0; |
| |
| if (prompt == 0 || *prompt == 0) |
| return (0); |
| |
| p = strrchr (prompt, '\n'); |
| if (!p) |
| { |
| /* The prompt is only one line. */ |
| local_prompt = expand_prompt (prompt, &visible_length, &last_invisible); |
| local_prompt_prefix = (char *)0; |
| return (visible_length); |
| } |
| else |
| { |
| /* The prompt spans multiple lines. */ |
| t = ++p; |
| local_prompt = expand_prompt (p, &visible_length, &last_invisible); |
| c = *t; *t = '\0'; |
| /* The portion of the prompt string up to and including the |
| final newline is now null-terminated. */ |
| local_prompt_prefix = expand_prompt (prompt, &prefix_length, (int *)NULL); |
| *t = c; |
| return (prefix_length); |
| } |
| } |
| |
| /* Basic redisplay algorithm. */ |
| void |
| rl_redisplay () |
| { |
| register int in, out, c, linenum, cursor_linenum; |
| register char *line; |
| int c_pos, inv_botlin, lb_botlin, lb_linenum; |
| int newlines, lpos, temp; |
| char *prompt_this_line; |
| |
| if (!readline_echoing_p) |
| return; |
| |
| if (!rl_display_prompt) |
| rl_display_prompt = ""; |
| |
| if (invisible_line == 0) |
| { |
| visible_line = xmalloc (line_size); |
| invisible_line = xmalloc (line_size); |
| for (in = 0; in < line_size; in++) |
| { |
| visible_line[in] = 0; |
| invisible_line[in] = 1; |
| } |
| |
| /* should be enough, but then again, this is just for testing. */ |
| inv_lbreaks = (int *)malloc (256 * sizeof (int)); |
| vis_lbreaks = (int *)malloc (256 * sizeof (int)); |
| inv_lbreaks[0] = vis_lbreaks[0] = 0; |
| |
| rl_on_new_line (); |
| } |
| |
| /* Draw the line into the buffer. */ |
| c_pos = -1; |
| |
| line = invisible_line; |
| out = inv_botlin = 0; |
| |
| /* Mark the line as modified or not. We only do this for history |
| lines. */ |
| if (_rl_mark_modified_lines && current_history () && rl_undo_list) |
| { |
| line[out++] = '*'; |
| line[out] = '\0'; |
| } |
| |
| /* If someone thought that the redisplay was handled, but the currently |
| visible line has a different modification state than the one about |
| to become visible, then correct the caller's misconception. */ |
| if (visible_line[0] != invisible_line[0]) |
| rl_display_fixed = 0; |
| |
| /* If the prompt to be displayed is the `primary' readline prompt (the |
| one passed to readline()), use the values we have already expanded. |
| If not, use what's already in rl_display_prompt. WRAP_OFFSET is the |
| number of non-visible characters in the prompt string. */ |
| if (rl_display_prompt == rl_prompt || local_prompt) |
| { |
| int local_len = local_prompt ? strlen (local_prompt) : 0; |
| if (local_prompt_prefix && forced_display) |
| _rl_output_some_chars (local_prompt_prefix, strlen (local_prompt_prefix)); |
| |
| if (local_len > 0) |
| { |
| strncpy (line + out, local_prompt, local_len); |
| out += local_len; |
| } |
| line[out] = '\0'; |
| wrap_offset = local_len - visible_length; |
| } |
| else |
| { |
| int pmtlen; |
| prompt_this_line = strrchr (rl_display_prompt, '\n'); |
| if (!prompt_this_line) |
| prompt_this_line = rl_display_prompt; |
| else |
| { |
| prompt_this_line++; |
| if (forced_display) |
| { |
| _rl_output_some_chars (rl_display_prompt, prompt_this_line - rl_display_prompt); |
| /* Make sure we are at column zero even after a newline, |
| regardless of the state of terminal output processing. */ |
| if (prompt_this_line[-2] != '\r') |
| cr (); |
| } |
| } |
| |
| pmtlen = strlen (prompt_this_line); |
| strncpy (line + out, prompt_this_line, pmtlen); |
| out += pmtlen; |
| line[out] = '\0'; |
| wrap_offset = 0; |
| } |
| |
| #define CHECK_LPOS() \ |
| do { \ |
| lpos++; \ |
| if (lpos >= screenwidth) \ |
| { \ |
| inv_lbreaks[++newlines] = out; \ |
| lpos = 0; \ |
| } \ |
| } while (0) |
| |
| /* inv_lbreaks[i] is where line i starts in the buffer. */ |
| inv_lbreaks[newlines = 0] = 0; |
| lpos = out - wrap_offset; |
| |
| /* XXX - what if lpos is already >= screenwidth before we start drawing the |
| contents of the command line? */ |
| while (lpos >= screenwidth) |
| { |
| #if 0 |
| temp = ((newlines + 1) * screenwidth) - ((newlines == 0) ? wrap_offset : 0); |
| #else |
| /* XXX - possible fix from Darin Johnson <darin@acuson.com> for prompt |
| string with invisible characters that is longer than the screen |
| width. */ |
| temp = ((newlines + 1) * screenwidth) + ((newlines == 0) ? wrap_offset : 0); |
| #endif |
| inv_lbreaks[++newlines] = temp; |
| lpos -= screenwidth; |
| } |
| |
| 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 >= screenwidth) |
| { |
| temp = screenwidth - lpos; |
| 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 temp, newout; |
| newout = (out | (int)7) + 1; |
| temp = newout - out; |
| if (lpos + temp >= screenwidth) |
| { |
| register int temp2; |
| temp2 = screenwidth - lpos; |
| 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 && term_up && *term_up) |
| { |
| line[out++] = '\0'; /* XXX - sentinel */ |
| 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; |
| inv_lbreaks[newlines+1] = out; |
| cursor_linenum = lb_linenum; |
| |
| /* C_POS == position in buffer where 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 && term_up && *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 >= screenchars) |
| out = 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 = 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) : 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 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 = visible_length + wrap_offset; |
| if (cursor_linenum == 0 && wrap_offset > 0 && _rl_last_c_pos > 0 && |
| _rl_last_c_pos <= last_invisible && local_prompt) |
| { |
| #if defined (__MSDOS__) |
| putc ('\r', rl_outstream); |
| #else |
| if (term_cr) |
| tputs (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 = 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 = 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 > 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 < 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 characters 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) + 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, |
| screenwidth + visible_wrap_offset, |
| 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 = screenwidth - t; |
| _rl_clear_to_eol (nleft); |
| } |
| visible_first_line_len = out - lmargin - M_OFFSET (lmargin, wrap_offset); |
| if (visible_first_line_len > screenwidth) |
| visible_first_line_len = screenwidth; |
| |
| _rl_move_cursor_relative (c_pos - lmargin, &invisible_line[lmargin]); |
| last_lmargin = lmargin; |
| } |
| } |
| fflush (rl_outstream); |
| |
| /* Swap visible and non-visible lines. */ |
| { |
| char *temp = visible_line; |
| int *itemp = vis_lbreaks; |
| visible_line = invisible_line; |
| invisible_line = temp; |
| vis_lbreaks = inv_lbreaks; |
| inv_lbreaks = itemp; |
| 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 handeled. |
| |
| 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 == 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 && |
| term_cr && lendiff > visible_length && _rl_last_c_pos > 0 && |
| od > lendiff && _rl_last_c_pos < last_invisible) |
| { |
| #if defined (__MSDOS__) |
| putc ('\r', rl_outstream); |
| #else |
| tputs (term_cr, 1, _rl_output_character_function); |
| #endif /* !__MSDOS__ */ |
| _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) |
| { |
| temp = visible_wrap_offset - current_invis_chars; |
| lendiff += temp; |
| } |
| |
| /* 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 (terminal_can_insert && ((2 * temp) >= lendiff || term_IC) && (!_rl_term_autowrap || !gl)) |
| { |
| /* If lendiff > visible_length and _rl_last_c_pos == 0 and |
| _rl_horizontal_scroll_mode == 1, inserting the characters with |
| term_IC or 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 <= 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 (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 (_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; |
| } |
| |
| /* 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; |
| 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 == screenwidth)) |
| { |
| #if defined (__MSDOS__) |
| putc ('\r', rl_outstream); |
| #else |
| tputs (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) |
| extern char *term_forward_char; |
| |
| if (term_forward_char) |
| for (i = _rl_last_c_pos; i < new; i++) |
| tputs (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 > screenheight) |
| return; |
| |
| #if defined (__GO32__) |
| { |
| int row, col; |
| |
| ScreenGetCursor (&row, &col); |
| ScreenSetCursor ((row + to - _rl_last_v_pos), col); |
| } |
| #else /* !__GO32__ */ |
| |
| if ((delta = to - _rl_last_v_pos) > 0) |
| { |
| for (i = 0; i < delta; i++) |
| putc ('\n', rl_outstream); |
| tputs (term_cr, 1, _rl_output_character_function); |
| _rl_last_c_pos = 0; |
| } |
| else |
| { /* delta < 0 */ |
| if (term_up && *term_up) |
| for (i = 0; i < -delta; i++) |
| tputs (term_up, 1, _rl_output_character_function); |
| } |
| #endif /* !__GO32__ */ |
| _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 = last_invisible; |
| saved_visible_length = visible_length; |
| |
| local_prompt = local_prompt_prefix = (char *)0; |
| last_invisible = visible_length = 0; |
| } |
| |
| void |
| _rl_restore_prompt () |
| { |
| if (local_prompt) |
| free (local_prompt); |
| if (local_prompt_prefix) |
| free (local_prompt_prefix); |
| |
| local_prompt = saved_local_prompt; |
| local_prompt_prefix = saved_local_prefix; |
| last_invisible = saved_last_invisible; |
| 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); |
| last_invisible = saved_last_invisible; |
| 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 !defined (__GO32__) |
| if (term_clreol) |
| tputs (term_clreol, 1, _rl_output_character_function); |
| else if (count) |
| #endif /* !__GO32__ */ |
| 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 !defined (__GO32__) |
| if (term_clrpag) |
| tputs (term_clrpag, 1, _rl_output_character_function); |
| else |
| #endif /* !__GO32__ */ |
| crlf (); |
| } |
| |
| /* Insert COUNT characters from STRING to the output stream. */ |
| static void |
| insert_some_chars (string, count) |
| char *string; |
| int count; |
| { |
| #if defined (__GO32__) |
| int row, col, width; |
| char *row_start; |
| |
| ScreenGetCursor (&row, &col); |
| width = ScreenCols (); |
| row_start = ScreenPrimary + (row * width); |
| |
| memcpy (row_start + col + count, row_start + col, width - col - count); |
| |
| /* Place the text on the screen. */ |
| _rl_output_some_chars (string, count); |
| #else /* !_GO32 */ |
| |
| /* If IC is defined, then we do not have to "enter" insert mode. */ |
| if (term_IC) |
| { |
| char *buffer; |
| buffer = tgoto (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 (term_im && *term_im) |
| tputs (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 (term_ic && *term_ic) |
| { |
| for (i = count; i--; ) |
| tputs (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 (term_ei && *term_ei) |
| tputs (term_ei, 1, _rl_output_character_function); |
| } |
| #endif /* !__GO32__ */ |
| } |
| |
| /* Delete COUNT characters from the display line. */ |
| static void |
| delete_chars (count) |
| int count; |
| { |
| #if defined (__GO32__) |
| int row, col, width; |
| char *row_start; |
| |
| ScreenGetCursor (&row, &col); |
| width = ScreenCols (); |
| row_start = ScreenPrimary + (row * width); |
| |
| memcpy (row_start + col, row_start + col + count, width - col - count); |
| memset (row_start + width - count, 0, count * 2); |
| #else /* !_GO32 */ |
| |
| if (count > screenwidth) /* XXX */ |
| return; |
| |
| if (term_DC && *term_DC) |
| { |
| char *buffer; |
| buffer = tgoto (term_DC, count, count); |
| tputs (buffer, count, _rl_output_character_function); |
| } |
| else |
| { |
| if (term_dc && *term_dc) |
| while (count--) |
| tputs (term_dc, 1, _rl_output_character_function); |
| } |
| #endif /* !__GO32__ */ |
| } |
| |
| 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) == screenwidth)) |
| { |
| char *last_line; |
| last_line = &visible_line[inv_lbreaks[_rl_vis_botlin]]; |
| _rl_move_cursor_relative (screenwidth - 1, last_line); |
| _rl_clear_to_eol (0); |
| putc (last_line[screenwidth - 1], rl_outstream); |
| } |
| _rl_vis_botlin = 0; |
| crlf (); |
| fflush (rl_outstream); |
| rl_display_fixed++; |
| } |
| |
| /* Move to the start of the current line. */ |
| static void |
| cr () |
| { |
| if (term_cr) |
| { |
| #if defined (__MSDOS__) |
| putc ('\r', rl_outstream); |
| #else |
| tputs (term_cr, 1, _rl_output_character_function); |
| #endif /* !__MSDOS__ */ |
| _rl_last_c_pos = 0; |
| } |
| } |
| |
| /* Redisplay the current line after a SIGWINCH is received. */ |
| void |
| _rl_redisplay_after_sigwinch () |
| { |
| char *t, *oldp, *oldl, *oldlprefix; |
| |
| /* 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 (term_cr) |
| { |
| #if defined (__MSDOS__) |
| putc ('\r', rl_outstream); |
| #else |
| tputs (term_cr, 1, _rl_output_character_function); |
| #endif /* !__MSDOS__ */ |
| _rl_last_c_pos = 0; |
| #if defined (__MSDOS__) |
| space_to_eol (screenwidth); |
| putc ('\r', rl_outstream); |
| #else |
| if (term_clreol) |
| tputs (term_clreol, 1, _rl_output_character_function); |
| else |
| { |
| space_to_eol (screenwidth); |
| tputs (term_cr, 1, _rl_output_character_function); |
| } |
| #endif |
| if (_rl_last_v_pos > 0) |
| _rl_move_vert (0); |
| } |
| else |
| crlf (); |
| |
| /* Redraw only the last line of a multi-line prompt. */ |
| t = strrchr (rl_display_prompt, '\n'); |
| if (t) |
| { |
| oldp = rl_display_prompt; |
| oldl = local_prompt; |
| oldlprefix = local_prompt_prefix; |
| rl_display_prompt = ++t; |
| local_prompt = local_prompt_prefix = (char *)NULL; |
| rl_forced_update_display (); |
| rl_display_prompt = oldp; |
| local_prompt = oldl; |
| local_prompt_prefix = oldlprefix; |
| } |
| 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 (); |
| } |
| } |