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yap-6.3/swi/console/edit.c

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2014-02-26 22:10:17 +00:00
/* $Id$
Part of SWI-Prolog
Author: Jan Wielemaker
E-mail: jan@swi.psy.uva.nl
WWW: http://www.swi-prolog.org
Copyright (C): 1985-2002, University of Amsterdam
This library is free software; you can redistribute it and/or
modify it under the terms of the GNU Lesser General Public
License as published by the Free Software Foundation; either
version 2.1 of the License, or (at your option) any later version.
This 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
Lesser General Public License for more details.
You should have received a copy of the GNU Lesser General Public
License along with this library; if not, write to the Free Software
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Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
*/
#include <windows.h>
#include <tchar.h>
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#define _MAKE_DLL 1
#undef _export
#include "console.h"
#include "console_i.h"
#include "common.h"
#include <memory.h>
#include <string.h>
#include <ctype.h>
#ifndef EOF
#define EOF -1
#endif
typedef void (*function)(Line ln, int chr); /* edit-function */
static function dispatch_table[256]; /* general dispatch-table */
static function dispatch_meta[256]; /* ESC-char dispatch */
static RlcCompleteFunc _rlc_complete_function = rlc_complete_file_function;
static void init_line_package(RlcData b);
static void bind_actions(void);
#ifndef min
#define min(a, b) ((a) < (b) ? (a) : (b))
#define max(a, b) ((a) > (b) ? (a) : (b))
#endif
#ifndef TRUE
#define TRUE 1
#define FALSE 0
#endif
#ifndef EOS
#define EOS 0
#endif
#ifndef ESC
#define ESC 27
#endif
#define COMPLETE_NEWLINE 1
#define COMPLETE_EOF 2
#define ctrl(c) ((c) - '@')
#define META_OFFSET 128
#define meta(c) ((c) + META_OFFSET)
/*******************************
* BUFFER *
*******************************/
/* - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
make_room(Line, int room)
Make n-characters space after the point.
- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - */
static void
make_room(Line ln, size_t room)
{ while ( ln->size + room + 1 > ln->allocated )
{ if ( !ln->data )
{ ln->data = rlc_malloc(256 * sizeof(TCHAR));
ln->allocated = 256;
} else
{ ln->allocated *= 2;
ln->data = rlc_realloc(ln->data, ln->allocated * sizeof(TCHAR));
}
}
memmove(&ln->data[ln->point + room], &ln->data[ln->point],
(ln->size - ln->point)*sizeof(TCHAR));
ln->size += room;
if ( room > 0 )
ln->change_start = min(ln->change_start, ln->point);
}
static void
set_line(Line ln, const TCHAR *s)
{ size_t len = _tcslen(s);
ln->size = ln->point = 0;
make_room(ln, len);
_tcsncpy(ln->data, s, len);
}
static void
terminate(Line ln)
{ if ( !ln->data )
{ ln->data = rlc_malloc(sizeof(TCHAR));
ln->allocated = 1;
}
ln->data[ln->size] = EOS;
}
static void
delete(Line ln, size_t from, size_t len)
{ if ( from < 0 || from > ln->size || len < 0 || from + len > ln->size )
return;
_tcsncpy(&ln->data[from], &ln->data[from+len], ln->size - (from+len));
ln->size -= len;
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}
/*******************************
* POSITIONING *
*******************************/
static size_t
back_word(Line ln, size_t from)
{ from = min(from, ln->size);
from = max(0, from);
if ( ln->data )
{ while(!rlc_is_word_char(ln->data[from-1]) && from > 0 )
from--;
while(rlc_is_word_char(ln->data[from-1]) && from > 0 )
from--;
}
return from;
}
static size_t
forw_word(Line ln, size_t from)
{ from = min(from, ln->size);
from = max(0, from);
if ( ln->data )
{ while(!rlc_is_word_char(ln->data[from]) && from < ln->size )
from++;
while(rlc_is_word_char(ln->data[from]) && from < ln->size )
from++;
}
return from;
}
/*******************************
* EDITING FUNCTIONS *
*******************************/
static __inline void
changed(Line ln, size_t from)
{ ln->change_start = min(ln->change_start, from);
}
static void
insert_self(Line ln, int chr)
{ make_room(ln, 1);
ln->data[ln->point++] = chr;
}
static void
backward_delete_character(Line ln, int chr)
{ if ( ln->point > 0 )
{ memmove(&ln->data[ln->point-1], &ln->data[ln->point],
(ln->size - ln->point)*sizeof(TCHAR));
ln->size--;
ln->point--;
}
changed(ln, ln->point);
}
static void
delete_character(Line ln, int chr)
{ if ( ln->point < ln->size )
{ ln->point++;
backward_delete_character(ln, chr);
}
}
static void
backward_character(Line ln, int chr)
{ if ( ln->point > 0 )
ln->point--;
}
static void
forward_character(Line ln, int chr)
{ if ( ln->point < ln->size )
ln->point++;
}
static void
backward_word(Line ln, int chr)
{ ln->point = back_word(ln, ln->point);
}
static void
forward_word(Line ln, int chr)
{ ln->point = forw_word(ln, ln->point);
}
static void
backward_delete_word(Line ln, int chr)
{ size_t from = back_word(ln, ln->point);
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memmove(&ln->data[from], &ln->data[ln->point],
(ln->size - ln->point)*sizeof(TCHAR));
ln->size -= ln->point - from;
ln->point = from;
changed(ln, from);
}
static void
forward_delete_word(Line ln, int chr)
{ size_t to = forw_word(ln, ln->point);
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memmove(&ln->data[ln->point], &ln->data[to], (ln->size - to)*sizeof(TCHAR));
ln->size -= to - ln->point;
changed(ln, ln->point);
}
static void
transpose_chars(Line ln, int chr)
{ if ( ln->point > 0 && ln->point < ln->size )
{ int c0 = ln->data[ln->point-1];
ln->data[ln->point-1] = ln->data[ln->point];
ln->data[ln->point] = c0;
changed(ln, ln->point-1);
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}
}
static void
start_of_line(Line ln, int chr)
{ ln->point = 0;
}
static void
end_of_line(Line ln, int chr)
{ ln->point = ln->size;
}
static void
kill_line(Line ln, int chr)
{ ln->size = ln->point;
changed(ln, ln->size);
}
static void
empty_line(Line ln, int chr)
{ ln->size = ln->point = 0;
changed(ln, 0);
}
static void
enter(Line ln, int chr)
{ ln->point = ln->size;
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#ifdef DOS_CRNL
make_room(ln, 2);
ln->data[ln->point++] = '\r';
ln->data[ln->point++] = '\n';
#else
make_room(ln, 1);
ln->data[ln->point++] = '\n';
#endif
terminate(ln);
ln->complete = COMPLETE_NEWLINE;
}
static void
eof(Line ln, int chr)
{ ln->point = ln->size;
terminate(ln);
ln->complete = COMPLETE_EOF;
}
static void
delete_character_or_eof(Line ln, int chr)
{ if ( ln->size == 0 )
{ ln->point = ln->size;
terminate(ln);
ln->complete = COMPLETE_EOF;
} else
delete_character(ln, chr);
}
static void
undefined(Line ln, int chr)
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{
}
static void
interrupt(Line ln, int chr)
{ raise(SIGINT);
}
/*******************************
* HISTORY *
*******************************/
static void
add_history(rlc_console c, const TCHAR *data)
{ const TCHAR *s = data;
while(*s && *s <= ' ')
s++;
if ( *s )
rlc_add_history(c, s);
}
static void
backward_history(Line ln, int chr)
{ const TCHAR *h;
if ( rlc_at_head_history(ln->console) && ln->size > 0 )
{ terminate(ln);
add_history(ln->console, ln->data);
}
if ( (h = rlc_bwd_history(ln->console)) )
{ set_line(ln, h);
ln->point = ln->size;
}
}
static void
forward_history(Line ln, int chr)
{ if ( !rlc_at_head_history(ln->console) )
{ const TCHAR *h = rlc_fwd_history(ln->console);
if ( h )
{ set_line(ln, h);
ln->point = ln->size;
}
} else
empty_line(ln, chr);
}
/*******************************
* COMPLETE *
*******************************/
RlcCompleteFunc
rlc_complete_hook(RlcCompleteFunc new)
{ RlcCompleteFunc old = _rlc_complete_function;
_rlc_complete_function = new;
return old;
}
static int
common(const TCHAR *s1, const TCHAR *s2, int insensitive)
{ int n = 0;
if ( !insensitive )
{ while(*s1 && *s1 == *s2)
{ s1++, s2++;
n++;
}
return n;
} else
{ while(*s1)
{ if ( _totlower(*s1) == _totlower(*s2) )
{ s1++, s2++;
n++;
} else
break;
}
return n;
}
}
static void
complete(Line ln, int chr)
{ if ( _rlc_complete_function )
{ rlc_complete_data dbuf;
RlcCompleteData data = &dbuf;
memset(data, 0, sizeof(dbuf));
data->line = ln;
data->call_type = COMPLETE_INIT;
if ( (*_rlc_complete_function)(data) )
{ TCHAR match[COMPLETE_MAX_WORD_LEN];
int nmatches = 1;
size_t ncommon = _tcslen(data->candidate);
size_t patlen = ln->point - data->replace_from;
_tcscpy(match, data->candidate);
data->call_type = COMPLETE_ENUMERATE;
while( (*data->function)(data) )
{ ncommon = common(match, data->candidate, data->case_insensitive);
match[ncommon] = EOS;
nmatches++;
}
data->call_type = COMPLETE_CLOSE;
(*data->function)(data);
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delete(ln, data->replace_from, patlen);
ln->point = data->replace_from;
make_room(ln, ncommon);
_tcsncpy(&ln->data[data->replace_from], match, ncommon);
ln->point += ncommon;
if ( nmatches == 1 && data->quote )
insert_self(ln, data->quote);
}
}
}
#define MAX_LIST_COMPLETIONS 256
static void
list_completions(Line ln, int chr)
{ if ( _rlc_complete_function )
{ rlc_complete_data dbuf;
RlcCompleteData data = &dbuf;
memset(data, 0, sizeof(dbuf));
data->line = ln;
data->call_type = COMPLETE_INIT;
if ( (*_rlc_complete_function)(data) )
{ TCHAR *buf[COMPLETE_MAX_MATCHES];
int n, nmatches = 0;
size_t len = _tcslen(data->candidate) + 1;
size_t longest = len;
size_t cols;
buf[nmatches] = rlc_malloc(len*sizeof(TCHAR));
_tcsncpy(buf[nmatches], data->candidate, len);
nmatches++;
data->call_type = COMPLETE_ENUMERATE;
while( (*data->function)(data) )
{ len = _tcslen(data->candidate) + 1;
buf[nmatches] = rlc_malloc(len*sizeof(TCHAR));
_tcsncpy(buf[nmatches], data->candidate, len);
nmatches++;
longest = max(longest, len);
if ( nmatches > COMPLETE_MAX_MATCHES )
{ TCHAR *msg = _T("\r\n! Too many matches\r\n");
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while(*msg)
rlc_putchar(ln->console, *msg++);
ln->reprompt = TRUE;
data->call_type = COMPLETE_CLOSE;
(*data->function)(data);
return;
}
}
data->call_type = COMPLETE_CLOSE;
(*data->function)(data);
cols = ScreenCols(ln->console) / longest;
rlc_putchar(ln->console, '\r');
rlc_putchar(ln->console, '\n');
for(n=0; n<nmatches; )
{ TCHAR *s = buf[n];
len = 0;
while(*s)
{ len++;
rlc_putchar(ln->console, *s++);
}
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rlc_free(buf[n++]);
if ( n % cols == 0 )
{ rlc_putchar(ln->console, '\r');
rlc_putchar(ln->console, '\n');
} else
{ while( len++ < longest )
rlc_putchar(ln->console, ' ');
}
}
if ( nmatches % cols != 0 )
{ rlc_putchar(ln->console, '\r');
rlc_putchar(ln->console, '\n');
}
ln->reprompt = TRUE;
}
}
}
/*******************************
* REPAINT *
*******************************/
static void
output(rlc_console b, TCHAR *s, size_t len)
{ while(len-- > 0)
{ if ( *s == '\n' )
rlc_putchar(b, '\r');
rlc_putchar(b, *s++);
}
}
static void
update_display(Line ln)
{ if ( ln->reprompt )
{ const TCHAR *prompt = rlc_prompt(ln->console, NULL);
const TCHAR *s = prompt;
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rlc_putchar(ln->console, '\r');
while(*s)
rlc_putchar(ln->console, *s++);
rlc_get_mark(ln->console, &ln->origin);
ln->change_start = 0;
ln->reprompt = FALSE;
}
rlc_goto_mark(ln->console, &ln->origin, ln->data, ln->change_start);
output(ln->console,
&ln->data[ln->change_start], ln->size - ln->change_start);
rlc_erase_from_caret(ln->console);
rlc_goto_mark(ln->console, &ln->origin, ln->data, ln->point);
rlc_update(ln->console);
ln->change_start = ln->size;
}
/*******************************
* TOPLEVEL *
*******************************/
TCHAR *
read_line(rlc_console b)
{ line ln;
init_line_package(b);
memset(&ln, 0, sizeof(line));
ln.console = b;
rlc_get_mark(b, &ln.origin);
while(!ln.complete)
{ int c;
rlc_mark m0, m1;
function func;
rlc_get_mark(b, &m0);
if ( (c = getch(b)) == IMODE_SWITCH_CHAR )
return RL_CANCELED_CHARP;
if ( c == EOF )
{ eof(&ln, c);
update_display(&ln);
break;
} else if ( c == ESC )
{ if ( (c = getch(b)) == IMODE_SWITCH_CHAR )
return RL_CANCELED_CHARP;
if ( c > 256 )
func = undefined;
else
func = dispatch_meta[c&0xff];
} else
{ if ( c >= 256 )
func = insert_self;
else
func = dispatch_table[c&0xff];
}
rlc_get_mark(b, &m1);
(*func)(&ln, c);
if ( m0.mark_x != m1.mark_x || m0.mark_y != m1.mark_y )
ln.reprompt = TRUE;
update_display(&ln);
}
rlc_clearprompt(b);
add_history(b, ln.data);
return ln.data;
}
/*******************************
* DISPATCH *
*******************************/
static void
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init_dispatch_table(void)
{ static int done;
if ( !done )
{ int n;
for(n=0; n<32; n++)
dispatch_table[n] = undefined;
for(n=32; n<256; n++)
dispatch_table[n] = insert_self;
for(n=0; n<256; n++)
dispatch_meta[n] = undefined;
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bind_actions();
done = TRUE;
}
}
static void
init_line_package(RlcData b)
{ init_dispatch_table();
rlc_init_history(b, 50);
}
/*******************************
* BIND *
*******************************/
typedef struct _action
{ char *name;
function function;
unsigned char keys[4];
} action, *Action;
#define ACTION(n, f, k) { n, f, k }
static action actions[] = {
ACTION("insert_self", insert_self, ""),
ACTION("backward_delete_character", backward_delete_character, "\b"),
ACTION("complete", complete, "\t"),
ACTION("enter", enter, "\r\n"),
ACTION("start_of_line", start_of_line, {ctrl('A')}),
ACTION("backward_character", backward_character, {ctrl('B')}),
ACTION("interrupt", interrupt, {ctrl('C')}),
ACTION("end_of_line", end_of_line, {ctrl('E')}),
ACTION("forward_character", forward_character, {ctrl('F')}),
ACTION("transpose_chars", transpose_chars, {ctrl('T')}),
ACTION("kill_line", kill_line, {ctrl('K')}),
ACTION("backward_history", backward_history, {ctrl('P')}),
ACTION("forward_history", forward_history, {ctrl('N')}),
ACTION("empty_line", empty_line, {ctrl('U')}),
ACTION("eof", eof, {ctrl('Z')}),
ACTION("delete_character_or_eof", delete_character_or_eof, {ctrl('D')}),
ACTION("delete_character", delete_character, {127}),
{ "forward_word", forward_word, {meta(ctrl('F')), meta('f')}},
{ "backward_word", backward_word, {meta(ctrl('B')), meta('b')}},
{ "forward_delete_word", forward_delete_word, {meta(127), meta('d')}},
ACTION("list_completions", list_completions, {meta('?')}),
ACTION("backward_delete_word", backward_delete_word, {meta('\b')}),
ACTION(NULL, NULL, "")
};
int
rlc_bind(int chr, const char *fname)
{ if ( chr >= 0 && chr <= 256 )
{ Action a = actions;
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for( ; a->name; a++ )
{ if ( strcmp(a->name, fname) == 0 )
{ if ( chr > META_OFFSET )
dispatch_meta[chr-META_OFFSET] = a->function;
else
dispatch_table[chr] = a->function;
return TRUE;
}
}
}
return FALSE;
}
static void
bind_actions()
{ Action a = actions;
for( ; a->name; a++ )
{ unsigned char *k = a->keys;
for( ; *k; k++ )
{ int chr = *k & 0xff;
if ( chr > META_OFFSET )
dispatch_meta[chr-META_OFFSET] = a->function;
else
dispatch_table[chr] = a->function;
}
}
}