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evil-qemacs/extras.c
Charlie Gordon 25834d334a added transpose commands (chars, words, lines)
2008-03-31 21:52:01 +00:00

387 lines
11 KiB
C
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/*
* QEmacs, extra commands non full version
*
* Copyright (c) 2000-2008 Charlie Gordon.
*
* This program 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 2 of the License, or
* (at your option) any later version.
*
* This program 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.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
*/
#include <time.h>
#include "qe.h"
#include "qfribidi.h"
void do_compare_windows(EditState *s, int argval)
{
QEmacsState *qs = s->qe_state;
EditState *s1;
EditState *s2;
int offset1, offset2, size1, size2, ch1, ch2;
int tries;
s1 = s;
/* Should use same internal function as for next_window */
if (s1->next_window)
s2 = s1->next_window;
else
s2 = qs->first_window;
if (argval)
qs->ignore_spaces ^= 1;
if (s1 == s2)
return;
size1 = s1->b->total_size;
size2 = s2->b->total_size;
if (qs->last_cmd_func == do_compare_windows
&& (eb_nextc(s1->b, s1->offset, &offset1) !=
eb_nextc(s2->b, s2->offset, &offset2))) {
/* Try to resync: just skip in parallel */
s1->offset = offset1;
s2->offset = offset2;
}
for (tries = 0;;) {
if (++tries >= 100000) {
tries = 0;
//if (check_input())
// return;
}
if (s1->offset >= size1) {
offset1 = s1->offset;
ch1 = EOF;
} else {
ch1 = eb_nextc(s1->b, s1->offset, &offset1);
}
if (s2->offset >= size2) {
offset2 = s2->offset;
ch2 = EOF;
} else {
ch2 = eb_nextc(s2->b, s2->offset, &offset2);
}
if (ch1 != ch2) {
if (qs->ignore_spaces) {
/* UTF-8 issue */
if (qe_isspace(ch1)) {
s1->offset = offset1;
continue;
}
if (qe_isspace(ch2)) {
s2->offset = offset2;
continue;
}
}
if (ch1 == EOF || ch2 == EOF)
put_status(s, "Extra characters");
else
put_status(s, "Difference: %c <-> %c", ch1, ch2);
break;
}
if (ch1 != EOF) {
s1->offset = offset1;
s2->offset = offset2;
continue;
}
put_status(s, "No difference");
break;
}
}
void do_delete_horizontal_space(EditState *s)
{
int from, to, offset, ch;
from = to = s->offset;
while (from > 0) {
ch = eb_prevc(s->b, from, &offset);
if (!qe_isblank(ch))
break;
from = offset;
}
while (to < s->b->total_size) {
ch = eb_nextc(s->b, to, &offset);
if (!qe_isblank(ch))
break;
to = offset;
}
s->offset = eb_delete_range(s->b, from, to);
}
void do_show_date_and_time(EditState *s, int argval)
{
time_t t = argval;
if (t == 0)
time(&t);
put_status(s, "%.24s", ctime(&t));
}
/* forward / backward block */
#define MAX_BUF_SIZE 512
#define MAX_LEVEL 20
static void do_forward_block(EditState *s, int dir)
{
unsigned int buf[MAX_BUF_SIZE];
char balance[MAX_LEVEL];
int line_num, col_num, offset, offset1, len, pos, style, c, c1, level;
eb_get_pos(s->b, &line_num, &col_num, s->offset);
offset = eb_goto_bol2(s->b, s->offset, &pos);
offset1 = offset;
len = s->get_colorized_line(s, buf, countof(buf), &offset1, line_num);
style = buf[pos] >> STYLE_SHIFT;
level = 0;
if (dir < 0) {
for (;;) {
if (pos == 0) {
if (offset <= 0)
break;
line_num--;
offset = eb_prev_line(s->b, offset);
offset1 = offset;
pos = s->get_colorized_line(s, buf, countof(buf), &offset1, line_num);
continue;
}
c = buf[--pos];
if (style != c >> STYLE_SHIFT) {
if (style == 0)
continue;
style = 0;
if ((c >> STYLE_SHIFT) != 0)
continue;
}
switch (c &= CHAR_MASK) {
case ')':
c1 = '(';
goto push;
case ']':
c1 = '[';
goto push;
case '}':
c1 = '{';
push:
if (level < MAX_LEVEL) {
balance[level] = c1;
}
level++;
break;
case '(':
case '[':
case '{':
if (level > 0) {
--level;
if (balance[level] != c) {
put_status(s, "Unmatched delimiter");
return;
}
if (level <= 0)
goto the_end;
}
break;
}
}
} else {
for (;;) {
if (pos >= len) {
/* Should simplify with get_colorized_line updating
* offset
*/
line_num++;
pos = 0;
offset = eb_next_line(s->b, offset);
if (offset >= s->b->total_size)
break;
offset1 = offset;
len = s->get_colorized_line(s, buf, countof(buf), &offset1, line_num);
continue;
}
c = buf[pos];
pos++;
if (style != c >> STYLE_SHIFT) {
if (style == 0)
continue;
style = 0;
if ((c >> STYLE_SHIFT) != 0)
continue;
}
switch (c &= CHAR_MASK) {
case '(':
c1 = ')';
goto push1;
case '[':
c1 = ']';
goto push1;
case '{':
c1 = '}';
push1:
if (level < MAX_LEVEL) {
balance[level] = c1;
}
level++;
break;
case ')':
case ']':
case '}':
if (level > 0) {
--level;
if (balance[level] != c) {
put_status(s, "Unmatched delimiter");
return;
}
if (level <= 0)
goto the_end;
}
break;
}
}
}
the_end:
while (pos > 0) {
eb_nextc(s->b, offset, &offset);
pos--;
}
s->offset = offset;
}
static void do_kill_block(EditState *s, int dir)
{
int start = s->offset;
if (s->b->flags & BF_READONLY)
return;
do_forward_block(s, dir);
do_kill(s, start, s->offset, dir);
}
enum {
CMD_TRANSPOSE_CHARS = 1,
CMD_TRANSPOSE_WORDS,
CMD_TRANSPOSE_LINES,
};
static void do_transpose(EditState *s, int cmd)
{
char buf[1024];
int offset0, offset1, offset2, offset3;
int size0, size1, size2;
switch (cmd) {
case CMD_TRANSPOSE_CHARS:
offset3 = s->offset;
eb_prevc(s->b, offset3, &offset2);
offset1 = offset2;
eb_prevc(s->b, offset1, &offset0);
break;
case CMD_TRANSPOSE_WORDS:
word_right(s, 1);
word_right(s, 0);
offset3 = s->offset;
word_left(s, 0);
offset2 = s->offset;
word_left(s, 1);
offset1 = s->offset;
word_left(s, 0);
offset0 = s->offset;
if (s->qe_state->flag_split_window_change_focus) {
/* set position to end of first word */
s->offset = offset0 + offset3 - offset2;
} else {
/* set position past last word (emacs behaviour) */
s->offset = offset3;
}
break;
case CMD_TRANSPOSE_LINES:
do_eol(s);
offset3 = s->offset;
do_bol(s);
offset2 = s->offset;
if (offset2)
s->offset--;
offset1 = s->offset;
do_bol(s);
offset0 = s->offset;
if (s->qe_state->flag_split_window_change_focus) {
/* set position to start of second line */
s->offset = offset0 + offset3 - offset1;
} else {
/* set position past second line (emacs behaviour) */
s->offset = offset3;
}
break;
default:
return;
}
size0 = offset1 - offset0;
size1 = offset2 - offset1;
size2 = offset3 - offset2;
if (size0 + size1 + size2 > ssizeof(buf)) {
/* Should use temporary buffers */
return;
}
eb_read(s->b, offset2, buf, size2);
eb_read(s->b, offset1, buf + size2, size1);
eb_read(s->b, offset0, buf + size2 + size1, size0);
eb_write(s->b, offset0, buf, size0 + size1 + size2);
}
static CmdDef extra_commands[] = {
CMD_( KEY_META('='), KEY_NONE,
"compare-windows", do_compare_windows, ESi, "ui" )
CMD_( KEY_META('\\'), KEY_NONE,
"delete-horizontal-space", do_delete_horizontal_space, ES, "*")
CMD_( KEY_CTRLX('t'), KEY_NONE,
"show-date-and-time", do_show_date_and_time, ESi, "ui")
/* Should map to KEY_META + KEY_CTRL_LEFT */
CMDV( KEY_META(KEY_CTRL('b')), KEY_NONE,
"backward-block", do_forward_block, ESi, -1, "v")
/* Should map to KEY_META + KEY_CTRL_RIGHT */
CMDV( KEY_META(KEY_CTRL('f')), KEY_NONE,
"forward-block", do_forward_block, ESi, 1, "v")
CMDV( KEY_ESC, KEY_DELETE,
"backward-kill-block", do_kill_block, ESi, -1, "v")
CMDV( KEY_META(KEY_CTRL('k')), KEY_NONE,
"kill-block", do_kill_block, ESi, 1, "*v")
/* Should also have mark-block on C-M-@ */
CMDV( KEY_CTRL('t'), KEY_NONE,
"transpose-chars", do_transpose, ESi, CMD_TRANSPOSE_CHARS, "*v")
CMDV( KEY_CTRLX(KEY_CTRL('t')), KEY_NONE,
"transpose-lines", do_transpose, ESi, CMD_TRANSPOSE_LINES, "*v")
CMDV( KEY_META('t'), KEY_NONE,
"transpose-words", do_transpose, ESi, CMD_TRANSPOSE_WORDS, "*v")
CMD_DEF_END,
};
static int extras_init(void)
{
int key;
qe_register_cmd_table(extra_commands, NULL);
for (key = KEY_META('0'); key <= KEY_META('9'); key++)
qe_register_binding(key, "universal-argument", NULL);
return 0;
}
qe_module_init(extras_init);
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