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
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)
#include <stdio.h>
-#if defined (__GO32__)
-# include <go32.h>
-# include <pc.h>
-#endif /* __GO32__ */
-
/* System-specific feature definitions and include files. */
#include "rldefs.h"
#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. */
/* 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
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.
}
}
+/* 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 ()
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 ();
}
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 ();
}
}
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; \
} \
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;
}
if (lpos + 4 >= screenwidth)
{
temp = screenwidth - lpos;
+ CHECK_INV_LBREAKS ();
inv_lbreaks[++newlines] = out + temp;
lpos = 4 - temp;
}
{
register int temp2;
temp2 = screenwidth - lpos;
+ CHECK_INV_LBREAKS ();
inv_lbreaks[++newlines] = out + temp2;
lpos = temp - temp2;
while (out < newout)
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;
}
}
inv_botlin = lb_botlin = newlines;
+ CHECK_INV_LBREAKS ();
inv_lbreaks[newlines+1] = out;
cursor_linenum = lb_linenum;
/* 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
putc ('\r', rl_outstream);
#else
tputs (term_cr, 1, _rl_output_character_function);
-#endif /* !__MSDOS__ */
+#endif
_rl_output_some_chars (local_prompt, lendiff);
_rl_last_c_pos = lendiff;
}
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 ()
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);
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
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 */
}
_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);
}
void
_rl_clear_screen ()
{
-#if !defined (__GO32__)
if (term_clrpag)
tputs (term_clrpag, 1, _rl_output_character_function);
else
-#endif /* !__GO32__ */
crlf ();
}
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)
{
if (term_ei && *term_ei)
tputs (term_ei, 1, _rl_output_character_function);
}
-#endif /* !__GO32__ */
}
/* Delete COUNT characters from the display line. */
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;
while (count--)
tputs (term_dc, 1, _rl_output_character_function);
}
-#endif /* !__GO32__ */
}
void
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);
putc ('\r', rl_outstream);
#else
tputs (term_cr, 1, _rl_output_character_function);
-#endif /* !__MSDOS__ */
+#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. */
putc ('\r', rl_outstream);
#else
tputs (term_cr, 1, _rl_output_character_function);
-#endif /* !__MSDOS__ */
+#endif
_rl_last_c_pos = 0;
#if defined (__MSDOS__)
space_to_eol (screenwidth);
/* 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 ();
}
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;
+}
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