diff options
Diffstat (limited to 'display.c')
| -rw-r--r-- | display.c | 358 |
1 files changed, 239 insertions, 119 deletions
@@ -7,7 +7,7 @@ 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 + as published by the Free Software Foundation; either version 2, or (at your option) any later version. The GNU Readline Library is distributed in the hope that it will be @@ -18,7 +18,7 @@ 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. */ + 59 Temple Place, Suite 330, Boston, MA 02111 USA. */ #define READLINE_LIBRARY #if defined (HAVE_CONFIG_H) @@ -41,11 +41,6 @@ #include <stdio.h> -#if defined (__GO32__) -# include <go32.h> -# include <pc.h> -#endif /* __GO32__ */ - /* System-specific feature definitions and include files. */ #include "rldefs.h" @@ -56,48 +51,25 @@ #include "readline.h" #include "history.h" +#include "rlprivate.h" +#include "xmalloc.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 (); +#if defined (HACK_TERMCAP_MOTION) +extern char *term_forward_char; #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 void update_line __P((char *, char *, int, int, int, int)); +static void space_to_eol __P((int)); +static void delete_chars __P((int)); +static void insert_some_chars __P((char *, int)); +static void cr __P((void)); static int *inv_lbreaks, *vis_lbreaks; - -extern char *xmalloc (), *xrealloc (); +static int inv_lbsize, vis_lbsize; /* 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. */ @@ -190,7 +162,7 @@ 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. */ + index of the last invisible character in the returned string. */ /* Current implementation: \001 (^A) start non-visible characters @@ -250,6 +222,18 @@ expand_prompt (pmt, lp, lip) return ret; } +/* Just strip out RL_PROMPT_START_IGNORE and RL_PROMPT_END_IGNORE from + PMT and return the rest of PMT. */ +char * +_rl_strip_prompt (pmt) + char *pmt; +{ + char *ret; + + ret = expand_prompt (pmt, (int *)NULL, (int *)NULL); + return ret; +} + /* * Expand the prompt string into the various display components, if * necessary. @@ -307,6 +291,49 @@ rl_expand_prompt (prompt) } } +/* Initialize the VISIBLE_LINE and INVISIBLE_LINE arrays, and their associated + arrays of line break markers. MINSIZE is the minimum size of VISIBLE_LINE + and INVISIBLE_LINE; if it is greater than LINE_SIZE, LINE_SIZE is + increased. If the lines have already been allocated, this ensures that + they can hold at least MINSIZE characters. */ +static void +init_line_structures (minsize) + int minsize; +{ + register int n; + + if (invisible_line == 0) /* initialize it */ + { + if (line_size < minsize) + line_size = minsize; + visible_line = xmalloc (line_size); + invisible_line = xmalloc (line_size); + } + else if (line_size < minsize) /* ensure it can hold MINSIZE chars */ + { + line_size *= 2; + if (line_size < minsize) + line_size = minsize; + visible_line = xrealloc (visible_line, line_size); + invisible_line = xrealloc (invisible_line, line_size); + } + + for (n = minsize; n < line_size; n++) + { + visible_line[n] = 0; + invisible_line[n] = 1; + } + + if (vis_lbreaks == 0) + { + /* should be enough. */ + inv_lbsize = vis_lbsize = 256; + inv_lbreaks = (int *)xmalloc (inv_lbsize * sizeof (int)); + vis_lbreaks = (int *)xmalloc (vis_lbsize * sizeof (int)); + inv_lbreaks[0] = vis_lbreaks[0] = 0; + } +} + /* Basic redisplay algorithm. */ void rl_redisplay () @@ -325,19 +352,7 @@ rl_redisplay () 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; - + init_line_structures (0); rl_on_new_line (); } @@ -395,12 +410,13 @@ rl_redisplay () else { prompt_this_line++; + pmtlen = prompt_this_line - rl_display_prompt; /* temp var */ if (forced_display) { - _rl_output_some_chars (rl_display_prompt, prompt_this_line - rl_display_prompt); + _rl_output_some_chars (rl_display_prompt, pmtlen); /* 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') + if (pmtlen < 2 || prompt_this_line[-2] != '\r') cr (); } } @@ -419,11 +435,25 @@ rl_redisplay () wrap_offset = 0; } +#define CHECK_INV_LBREAKS() \ + do { \ + if (newlines >= (inv_lbsize - 2)) \ + { \ + inv_lbsize *= 2; \ + inv_lbreaks = (int *)xrealloc (inv_lbreaks, inv_lbsize * sizeof (int)); \ + } \ + } while (0) + #define CHECK_LPOS() \ do { \ lpos++; \ if (lpos >= screenwidth) \ { \ + if (newlines >= (inv_lbsize - 2)) \ + { \ + inv_lbsize *= 2; \ + inv_lbreaks = (int *)xrealloc (inv_lbreaks, inv_lbsize * sizeof (int)); \ + } \ inv_lbreaks[++newlines] = out; \ lpos = 0; \ } \ @@ -437,14 +467,13 @@ rl_redisplay () 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. */ + width. XXX - this doesn't work right if invisible characters have + to be put on the second screen line -- it adds too much (the number + of invisible chars after the screenwidth). */ temp = ((newlines + 1) * screenwidth) + ((newlines == 0) ? wrap_offset : 0); -#endif + inv_lbreaks[++newlines] = temp; lpos -= screenwidth; } @@ -477,6 +506,7 @@ rl_redisplay () if (lpos + 4 >= screenwidth) { temp = screenwidth - lpos; + CHECK_INV_LBREAKS (); inv_lbreaks[++newlines] = out + temp; lpos = 4 - temp; } @@ -506,6 +536,7 @@ rl_redisplay () { register int temp2; temp2 = screenwidth - lpos; + CHECK_INV_LBREAKS (); inv_lbreaks[++newlines] = out + temp2; lpos = temp - temp2; while (out < newout) @@ -522,6 +553,7 @@ rl_redisplay () else if (c == '\n' && _rl_horizontal_scroll_mode == 0 && term_up && *term_up) { line[out++] = '\0'; /* XXX - sentinel */ + CHECK_INV_LBREAKS (); inv_lbreaks[++newlines] = out; lpos = 0; } @@ -546,6 +578,7 @@ rl_redisplay () } inv_botlin = lb_botlin = newlines; + CHECK_INV_LBREAKS (); inv_lbreaks[newlines+1] = out; cursor_linenum = lb_linenum; @@ -651,8 +684,12 @@ rl_redisplay () 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; } @@ -772,11 +809,17 @@ rl_redisplay () /* Swap visible and non-visible lines. */ { char *temp = visible_line; - int *itemp = vis_lbreaks; + int *itemp = vis_lbreaks, ntemp = vis_lbsize; + visible_line = invisible_line; invisible_line = temp; + 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 @@ -899,7 +942,11 @@ update_line (old, new, current_line, omax, nmax, inv_botlin) 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 _rl_output_some_chars (local_prompt, lendiff); _rl_last_c_pos = lendiff; } @@ -1029,6 +1076,58 @@ rl_on_new_line () 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 = 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 () @@ -1086,8 +1185,6 @@ _rl_move_cursor_relative (new, data) 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); @@ -1114,20 +1211,15 @@ _rl_move_vert (to) 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); +#if defined (__MSDOS__) + putc ('\r', rl_outstream); +#else tputs (term_cr, 1, _rl_output_character_function); +#endif _rl_last_c_pos = 0; } else @@ -1136,7 +1228,7 @@ _rl_move_vert (to) 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 */ } @@ -1344,11 +1436,9 @@ 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); } @@ -1369,11 +1459,9 @@ space_to_eol (count) void _rl_clear_screen () { -#if !defined (__GO32__) if (term_clrpag) tputs (term_clrpag, 1, _rl_output_character_function); else -#endif /* !__GO32__ */ crlf (); } @@ -1383,20 +1471,6 @@ 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) { @@ -1429,7 +1503,6 @@ insert_some_chars (string, count) if (term_ei && *term_ei) tputs (term_ei, 1, _rl_output_character_function); } -#endif /* !__GO32__ */ } /* Delete COUNT characters from the display line. */ @@ -1437,18 +1510,6 @@ 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; @@ -1464,7 +1525,6 @@ delete_chars (count) while (count--) tputs (term_dc, 1, _rl_output_character_function); } -#endif /* !__GO32__ */ } void @@ -1486,7 +1546,11 @@ _rl_update_final () if (full_lines && _rl_term_autowrap && (VIS_LLEN(_rl_vis_botlin) == 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 (screenwidth - 1, last_line); _rl_clear_to_eol (0); putc (last_line[screenwidth - 1], rl_outstream); @@ -1503,23 +1567,66 @@ cr () { if (term_cr) { +#if defined (__MSDOS__) + putc ('\r', rl_outstream); +#else tputs (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; + + /* Geez, I should make this a struct. */ + oldp = rl_display_prompt; + oldl = local_prompt; + oldlprefix = local_prompt_prefix; + oldlen = visible_length; + oldplen = prefix_length; + oldlast = last_invisible; + + rl_display_prompt = t; + local_prompt = expand_prompt (t, &visible_length, &last_invisible); + local_prompt_prefix = (char *)NULL; + rl_forced_update_display (); + + rl_display_prompt = oldp; + local_prompt = oldl; + local_prompt_prefix = oldlprefix; + visible_length = oldlen; + prefix_length = oldplen; + last_invisible = oldlast; +} + /* Redisplay the current line after a SIGWINCH is received. */ void _rl_redisplay_after_sigwinch () { - char *t, *oldp, *oldl, *oldlprefix; + 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 (term_cr) { +#if defined (__MSDOS__) + putc ('\r', rl_outstream); +#else tputs (term_cr, 1, _rl_output_character_function); +#endif _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 @@ -1527,6 +1634,7 @@ _rl_redisplay_after_sigwinch () space_to_eol (screenwidth); tputs (term_cr, 1, _rl_output_character_function); } +#endif if (_rl_last_v_pos > 0) _rl_move_vert (0); } @@ -1536,17 +1644,7 @@ _rl_redisplay_after_sigwinch () /* 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; - } + redraw_prompt (++t); else rl_forced_update_display (); } @@ -1571,3 +1669,25 @@ _rl_erase_entire_line () 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 - screenwidth - rl_visible_prompt_length; + else + nleft = _rl_last_c_pos - screenwidth; + + if (nleft > 0) + ret = 1 + nleft / screenwidth; + else + ret = 0; + + return ret; +} |