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qe.c
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qe.c
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/*
* QEmacs, tiny but powerful multimode editor
*
* Copyright (c) 2000-2002 Fabrice Bellard.
* Copyright (c) 2000-2020 Charlie Gordon.
*
* 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 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
* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*/
#include "qe.h"
#ifdef CONFIG_TINY
#undef CONFIG_DLL
#undef CONFIG_ALL_KMAPS
#undef CONFIG_UNICODE_JOIN
#endif
#include "qfribidi.h"
#include "variables.h"
#ifdef CONFIG_DLL
#include <dlfcn.h>
#endif
/* each history list */
typedef struct HistoryEntry {
struct HistoryEntry *next;
StringArray history;
char name[32];
} HistoryEntry;
#ifdef CONFIG_INIT_CALLS
static int (*qe__initcall_first)(void) qe__init_call = NULL;
static void (*qe__exitcall_first)(void) qe__exit_call = NULL;
#endif
void print_at_byte(QEditScreen *screen,
int x, int y, int width, int height,
const char *str, QETermStyle style);
static EditBuffer *predict_switch_to_buffer(EditState *s);
static StringArray *get_history(const char *name);
static void qe_key_process(int key);
static int generic_save_window_data(EditState *s);
static int generic_mode_init(EditState *s);
static void generic_mode_close(EditState *s);
static void generic_text_display(EditState *s);
static void display1(DisplayState *ds);
#ifndef CONFIG_TINY
static void save_selection(void);
#endif
QEmacsState qe_state;
/* should handle multiple screens, and multiple sessions */
static QEditScreen global_screen;
static int screen_width = 0;
static int screen_height = 0;
static int no_init_file;
static int single_window;
int force_tty;
int disable_crc;
int use_session_file;
int use_html = 1;
#ifndef CONFIG_TINY
static int free_everything;
#endif
/* mode handling */
static int default_mode_init(EditState *s, EditBuffer *b, int flags) { return 0; }
static int generic_mode_probe(ModeDef *mode, ModeProbeData *p)
{
if (match_extension(p->filename, mode->extensions)
|| match_shell_handler(cs8(p->buf), mode->shell_handlers)) {
return 80;
}
return 1;
}
ModeDef *qe_find_mode(const char *name, int flags)
{
QEmacsState *qs = &qe_state;
ModeDef *m;
for (m = qs->first_mode; m; m = m->next) {
if ((m->flags & flags) == flags) {
if ((m->name && !strcasecmp(m->name, name))
|| (m->alt_name && !strcasecmp(m->alt_name, name)))
break;
}
}
return m;
}
ModeDef *qe_find_mode_filename(const char *filename, int flags)
{
QEmacsState *qs = &qe_state;
ModeDef *m;
for (m = qs->first_mode; m; m = m->next) {
if ((m->flags & flags) == flags
&& match_extension(filename, m->extensions)) {
break;
}
}
return m;
}
void qe_register_mode(ModeDef *m, int flags)
{
QEmacsState *qs = &qe_state;
ModeDef **p;
/* register mode in mode list (at end) */
for (p = &qs->first_mode;; p = &(*p)->next) {
if (*p == m) {
/* mode is already registered, do nothing */
return;
}
if (*p == NULL) {
m->next = NULL;
*p = m;
break;
}
}
m->flags |= flags;
if (m->flags & MODEF_SYNTAX) {
/* default to text handling */
if (!m->display_line)
m->display_line = text_display_line;
if (!m->backward_offset)
m->backward_offset = text_backward_offset;
if (!m->move_up_down)
m->move_up_down = text_move_up_down;
if (!m->move_left_right)
m->move_left_right = text_move_left_right_visual;
if (!m->move_bol)
m->move_bol = text_move_bol;
if (!m->move_eol)
m->move_eol = text_move_eol;
if (!m->move_bof)
m->move_bof = text_move_bof;
if (!m->move_eof)
m->move_eof = text_move_eof;
if (!m->move_word_left_right)
m->move_word_left_right = text_move_word_left_right;
if (!m->scroll_up_down)
m->scroll_up_down = text_scroll_up_down;
if (!m->mouse_goto)
m->mouse_goto = text_mouse_goto;
if (!m->write_char)
m->write_char = text_write_char;
}
/* add missing functions */
if (!m->mode_init)
m->mode_init = default_mode_init;
/* if no syntax probing function, use extension matcher */
if (!m->mode_probe && m->extensions)
m->mode_probe = generic_mode_probe;
if (!m->display)
m->display = generic_text_display;
if (!m->data_type)
m->data_type = &raw_data_type;
if (!m->get_mode_line)
m->get_mode_line = text_mode_line;
/* add a new command to switch to that mode */
if (!(m->flags & MODEF_NOCMD)) {
char buf[64];
int size;
CmdDef *def;
const char *mode_name = m->alt_name ? m->alt_name : m->name;
/* lower case convert for C mode, Perl... */
qe_strtolower(buf, sizeof(buf) - 10, mode_name);
pstrcat(buf, sizeof(buf), "-mode");
size = strlen(buf) + 1;
/* constant immediate string parameter */
size += snprintf(buf + size, sizeof(buf) - size,
"S{%s}", mode_name) + 1;
def = qe_mallocz_array(CmdDef, 2);
def->name = qe_malloc_dup(buf, size);
def->key = def->alt_key = KEY_NONE;
def->sig = CMD_ESs;
def->val = 0;
def->action.ESs = do_set_mode;
def[1].val = 1; /* flag as allocated for free-all */
qe_register_cmd_table(def, NULL);
}
}
void mode_complete(CompleteState *cp)
{
QEmacsState *qs = cp->s->qe_state;
ModeDef *m;
for (m = qs->first_mode; m != NULL; m = m->next) {
complete_test(cp, m->name);
if (m->alt_name && !strequal(m->name, m->alt_name))
complete_test(cp, m->alt_name);
}
}
static CompletionDef mode_completion = {
"mode", mode_complete
};
/* commands handling */
CmdDef *qe_find_cmd(const char *cmd_name)
{
QEmacsState *qs = &qe_state;
CmdDef *d;
d = qs->first_cmd;
while (d != NULL) {
while (d->name != NULL) {
if (strequal(cmd_name, d->name))
return d;
d++;
}
d = d->action.next;
}
return NULL;
}
void command_complete(CompleteState *cp)
{
QEmacsState *qs = cp->s->qe_state;
CmdDef *d;
d = qs->first_cmd;
while (d != NULL) {
while (d->name != NULL) {
complete_test(cp, d->name);
d++;
}
d = d->action.next;
}
}
int command_print_entry(CompleteState *cp, EditState *s, const char *name)
{
EditBuffer *b = s->b;
CmdDef *d = qe_find_cmd(name);
if (d) {
char buf[256];
int len;
b->cur_style = QE_STYLE_FUNCTION;
len = eb_puts(b, d->name);
b->cur_style = QE_STYLE_DEFAULT;
qe_get_prototype(d, buf, sizeof buf);
len += eb_puts(b, buf);
#ifndef CONFIG_TINY
if (qe_list_bindings(d, s->mode, 1, buf, sizeof buf)) {
b->cur_style = QE_STYLE_COMMENT;
if (2 + len < 40) {
b->tab_width = max(2 + len, b->tab_width);
len += eb_putc(b, '\t');
} else {
b->tab_width = 40;
}
len += eb_printf(b, " bound to %s", buf);
b->cur_style = QE_STYLE_DEFAULT;
}
#endif
return len;
} else {
return eb_puts(b, name);
}
}
int command_get_entry(EditState *s, char *dest, int size, int offset)
{
int len;
eb_fgets(s->b, dest, size, offset, &offset);
len = strcspn(dest, " \t\n(");
dest[len] = '\0'; /* strip the TAB or trailing newline if any */
return len;
}
static CompletionDef command_completion = {
"command", command_complete, command_print_entry, command_get_entry
};
static int qe_register_binding1(unsigned int *keys, int nb_keys,
CmdDef *d, ModeDef *m)
{
QEmacsState *qs = &qe_state;
KeyDef **lp, *p;
int i;
if (!d)
return -1;
/* add key */
p = qe_malloc_hack(KeyDef, (nb_keys - 1) * sizeof(p->keys[0]));
if (!p)
return -1;
p->cmd = d;
p->nb_keys = nb_keys;
for (i = 0; i < nb_keys; i++) {
p->keys[i] = keys[i];
}
lp = m ? &m->first_key : &qs->first_key;
/* Bindings must be prepended to override previous bindings */
/* XXX: should avoid multiple redundant bindings */
#if 0
while (*lp != NULL && (*lp)->mode != NULL)
lp = &(*lp)->next;
#endif
p->next = *lp;
*lp = p;
return 0;
}
/* convert compressed mappings to real ones */
static int qe_register_binding2(int key, CmdDef *d, ModeDef *m)
{
int nb_keys;
unsigned int keys[3];
nb_keys = 0;
if (key >= KEY_CTRLX(0) && key <= KEY_CTRLX(0xff)) {
keys[nb_keys++] = KEY_CTRL('x');
keys[nb_keys++] = key & 0xff;
} else
if (key >= KEY_CTRLXRET(0) && key <= KEY_CTRLXRET(0xff)) {
keys[nb_keys++] = KEY_CTRL('x');
keys[nb_keys++] = KEY_RET;
keys[nb_keys++] = key & 0xff;
} else
if (key >= KEY_CTRLH(0) && key <= KEY_CTRLH(0xff)) {
keys[nb_keys++] = KEY_CTRL('h');
keys[nb_keys++] = key & 0xff;
} else
if (key >= KEY_CTRLC(0) && key <= KEY_CTRLC(0xff)) {
keys[nb_keys++] = KEY_CTRL('c');
keys[nb_keys++] = key & 0xff;
} else {
keys[nb_keys++] = key;
}
return qe_register_binding1(keys, nb_keys, d, m);
}
/* if mode is non NULL, the defined keys are only active in this mode */
void qe_register_cmd_table(CmdDef *cmds, ModeDef *m)
{
QEmacsState *qs = &qe_state;
CmdDef **ld, *d;
/* find last command table */
for (ld = &qs->first_cmd;;) {
d = *ld;
if (d == NULL) {
/* link new command table */
*ld = cmds;
break;
}
if (d == cmds) {
/* Command table already registered, still do the binding
* phase to allow multiple mode bindings.
*/
break;
}
while (d->name != NULL) {
d++;
}
ld = &d->action.next;
}
/* add default bindings */
for (d = cmds; d->name != NULL; d++) {
if (d->key == KEY_CTRL('x') || d->key == KEY_CTRL('c')
|| d->key == KEY_ESC) {
unsigned int keys[2];
keys[0] = d->key;
keys[1] = d->alt_key;
qe_register_binding1(keys, 2, d, m);
} else {
if (d->key != KEY_NONE)
qe_register_binding2(d->key, d, m);
if (d->alt_key != KEY_NONE)
qe_register_binding2(d->alt_key, d, m);
}
}
}
/* key binding handling */
int qe_register_binding(int key, const char *cmd_name, ModeDef *m)
{
return qe_register_binding2(key, qe_find_cmd(cmd_name), m);
}
int qe_mode_set_key(ModeDef *m, const char *keystr, const char *cmd_name)
{
unsigned int keys[MAX_KEYS];
int nb_keys;
nb_keys = strtokeys(keystr, keys, MAX_KEYS);
if (!nb_keys)
return -2;
return qe_register_binding1(keys, nb_keys, qe_find_cmd(cmd_name), m);
}
void do_set_key(EditState *s, const char *keystr,
const char *cmd_name, int local)
{
ModeDef *m = local ? s->mode : NULL;
int res = qe_mode_set_key(m, keystr, cmd_name);
if (res == -2)
put_status(s, "Invalid keys: %s", keystr);
if (res == -1)
put_status(s, "Invalid command: %s", cmd_name);
}
void do_toggle_control_h(EditState *s, int set)
{
/* Achtung Minen! do_toggle_control_h can be called from tty_init
* with a NULL EditState.
*/
QEmacsState *qs = s ? s->qe_state : &qe_state;
ModeDef *m;
KeyDef *kd;
int i;
if (set)
set = (set > 0);
else
set = !qs->backspace_is_control_h;
if (qs->backspace_is_control_h == set)
return;
qs->backspace_is_control_h = set;
/* CG: This hack in incompatible with support for multiple
* concurrent input consoles.
*/
for (m = qs->first_mode;; m = m->next) {
for (kd = m ? m->first_key : qs->first_key; kd; kd = kd->next) {
for (i = 0; i < kd->nb_keys; i++) {
switch (kd->keys[i]) {
case KEY_CTRL('h'):
kd->keys[i] = set ? KEY_META('h') : KEY_DEL;
break;
case KEY_DEL:
if (set)
kd->keys[i] = KEY_CTRL('h');
break;
case KEY_META('h'):
if (!set)
kd->keys[i] = KEY_CTRL('h');
break;
}
}
}
if (!m)
break;
}
}
void do_set_emulation(EditState *s, const char *name)
{
QEmacsState *qs = s->qe_state;
if (strequal(name, "epsilon")) {
qs->emulation_flags = 1;
qs->flag_split_window_change_focus = 1;
} else
if (strequal(name, "emacs") || strequal(name, "xemacs")) {
qs->emulation_flags = 0;
qs->flag_split_window_change_focus = 0;
} else
if (strequal(name, "vi") || strequal(name, "vim")) {
put_status(s, "Emulation '%s' not available yet", name);
} else {
put_status(s, "Unknown emulation '%s'", name);
}
}
void do_start_trace_mode(EditState *s)
{
do_set_trace_options(s, "all");
}
void do_set_trace_options(EditState *s, const char *options)
{
char buf[80];
const char *p = options;
QEmacsState *qs = s->qe_state;
int last_flags = qs->trace_flags;
while (*p) {
p += strspn(p, " \t,");
if (strstart(p, "none", &p) || strstart(p, "off", &p))
qs->trace_flags = 0;
else
if (strstart(p, "all", &p) || strstart(p, "on", &p))
qs->trace_flags = EB_TRACE_ALL;
else
if (strstart(p, "tty", &p)) {
qs->trace_flags |= EB_TRACE_TTY;
} else
if (strstart(p, "shell", &p)) {
qs->trace_flags |= EB_TRACE_SHELL;
} else
if (strstart(p, "pty", &p)) {
qs->trace_flags |= EB_TRACE_PTY;
} else
if (strstart(p, "emulate", &p)) {
qs->trace_flags |= EB_TRACE_EMULATE;
} else
if (strstart(p, "command", &p)) {
qs->trace_flags |= EB_TRACE_COMMAND;
} else {
break;
}
}
if (qs->trace_flags) {
if (!qs->trace_buffer) {
qs->trace_buffer = eb_new("*trace*", BF_SYSTEM);
}
if (!last_flags) {
EditState *e = qe_split_window(s, 75, SW_STACKED);
if (e) {
do_switch_to_buffer(e, "*trace*");
}
}
*buf = '\0';
if (qs->trace_flags & EB_TRACE_TTY) {
strcat(buf, ", tty");
}
if (qs->trace_flags & EB_TRACE_SHELL) {
strcat(buf, ", shell");
}
if (qs->trace_flags & EB_TRACE_PTY) {
strcat(buf, ", pty");
}
if (qs->trace_flags & EB_TRACE_EMULATE) {
strcat(buf, ", emulate");
}
if (qs->trace_flags & EB_TRACE_COMMAND) {
strcat(buf, ", command");
}
put_status(s, "Tracing enabled for %s", buf + 2);
} else {
put_status(s, "Tracing disabled");
}
}
void do_cd(EditState *s, const char *path)
{
char buf[MAX_FILENAME_SIZE];
canonicalize_absolute_path(s, buf, sizeof(buf), path);
if (chdir(buf)) {
put_status(s, "Cannot change directory to '%s'", buf);
} else {
if (!getcwd(buf, sizeof(buf)))
put_status(s, "Cannot get current directory");
else
put_status(s, "Current directory: %s", buf);
}
}
/* basic editing functions */
void do_bof(EditState *s)
{
if (s->mode->move_bof)
s->mode->move_bof(s);
}
void do_eof(EditState *s)
{
if (s->mode->move_eof)
s->mode->move_eof(s);
}
void do_bol(EditState *s)
{
if (s->mode->move_bol)
s->mode->move_bol(s);
}
void do_eol(EditState *s)
{
if (s->mode->move_eol)
s->mode->move_eol(s);
}
void do_word_right(EditState *s, int dir)
{
if (s->mode->move_word_left_right)
s->mode->move_word_left_right(s, dir);
}
void text_move_bof(EditState *s)
{
s->offset = 0;
}
void text_move_eof(EditState *s)
{
s->offset = s->b->total_size;
}
void text_move_bol(EditState *s)
{
s->offset = eb_goto_bol(s->b, s->offset);
}
void text_move_eol(EditState *s)
{
s->offset = eb_goto_eol(s->b, s->offset);
}
void word_right(EditState *s, int w)
{
int c, offset1;
for (;;) {
if (s->offset >= s->b->total_size)
break;
c = eb_nextc(s->b, s->offset, &offset1);
if (qe_isword(c) == w)
break;
s->offset = offset1;
}
}
void word_left(EditState *s, int w)
{
int c, offset1;
for (;;) {
if (s->offset == 0)
break;
c = eb_prevc(s->b, s->offset, &offset1);
if (qe_isword(c) == w)
break;
s->offset = offset1;
}
}
void text_move_word_left_right(EditState *s, int dir)
{
if (dir > 0) {
word_right(s, 1);
word_right(s, 0);
} else {
word_left(s, 1);
word_left(s, 0);
}
}
int qe_get_word(EditState *s, char *buf, int buf_size,
int offset, int *offset_ptr)
{
EditBuffer *b = s->b;
buf_t outbuf, *out;
int offset1;
int c;
out = buf_init(&outbuf, buf, buf_size);
/* XXX: the qe_isword pattern should depend on the current mode */
if (qe_isword(eb_nextc(b, offset, &offset1))) {
while (qe_isword(eb_prevc(b, offset, &offset1))) {
offset = offset1;
}
} else {
while ((offset = offset1) < b->total_size) {
if (!qe_isword(eb_nextc(b, offset, &offset1)))
break;
}
}
while (offset < b->total_size) {
if (!qe_isword(c = eb_nextc(b, offset, &offset1)))
break;
buf_putc_utf8(out, c);
offset = offset1;
}
if (offset_ptr) {
*offset_ptr = offset;
}
return out->len;
}
void do_mark_region(EditState *s, int mark, int offset)
{
/* CG: Should have local and global mark rings */
s->b->mark = clamp(mark, 0, s->b->total_size);
s->offset = clamp(offset, 0, s->b->total_size);
/* activate region hilite */
if (s->qe_state->hilite_region)
s->region_style = QE_STYLE_REGION_HILITE;
}
/* paragraph handling */
int eb_next_paragraph(EditBuffer *b, int offset)
{
int text_found;
offset = eb_goto_bol(b, offset);
/* find end of paragraph */
text_found = 0;
for (;;) {
if (offset >= b->total_size)
break;
if (eb_is_blank_line(b, offset, NULL)) {
if (text_found)
break;
} else {
text_found = 1;
}
offset = eb_next_line(b, offset);
}
return offset;
}
int eb_start_paragraph(EditBuffer *b, int offset)
{
for (;;) {
offset = eb_goto_bol(b, offset);
if (offset <= 0)
break;
/* check if only spaces */
if (eb_is_blank_line(b, offset, &offset)) {
break;
}
offset = eb_prev(b, offset);
}
return offset;
}
void do_mark_paragraph(EditState *s)
{
int start = eb_start_paragraph(s->b, s->offset);
int end = eb_next_paragraph(s->b, s->offset);
do_mark_region(s, start, end);
}
void do_backward_paragraph(EditState *s)
{
int offset;
offset = s->offset;
/* skip empty lines */
for (;;) {
if (offset <= 0)
break;
offset = eb_goto_bol(s->b, offset);
if (!eb_is_blank_line(s->b, offset, NULL))
break;
/* line just before */
offset = eb_prev(s->b, offset);
}
offset = eb_start_paragraph(s->b, offset);
/* line just before */
offset = eb_prev_line(s->b, offset);
s->offset = offset;
}
void do_forward_paragraph(EditState *s)
{
s->offset = eb_next_paragraph(s->b, s->offset);
}
void do_kill_paragraph(EditState *s, int dir)
{
int start = s->offset;
if (dir < 0)
do_backward_paragraph(s);
else
do_forward_paragraph(s);
do_kill(s, start, s->offset, dir, 0);
}
void do_fill_paragraph(EditState *s)
{
/* buffer offsets, byte counts */
int par_start, par_end, offset, offset1, chunk_start, word_start;
/* number of characters */
int col, indent_size, word_size, space_size;
/* other counts */
int n, word_count;
/* character */
int c;
/* find start & end of paragraph */
par_start = eb_start_paragraph(s->b, s->offset);
par_end = eb_next_paragraph(s->b, par_start);
/* compute indent size */
indent_size = 0;
offset = eb_next_line(s->b, par_start);
if (!eb_is_blank_line(s->b, offset, NULL)) {
while (offset < par_end) {
c = eb_nextc(s->b, offset, &offset);
if (!qe_isblank(c))
break;
indent_size++;
}
}
/* suppress any spaces in between */
col = 0;
offset = par_start;
word_count = 0;
while (offset < par_end) {
/* skip spaces */
chunk_start = offset;
space_size = 0;
while (offset < par_end) {
c = eb_nextc(s->b, offset, &offset1);
if (!qe_isspace(c))
break;
offset = offset1;
space_size++;
}
/* skip word */
word_start = offset;
word_size = 0;
while (offset < par_end) {
c = eb_nextc(s->b, offset, &offset1);
if (qe_isspace(c))
break;
offset = offset1;
word_size++;
}
if (word_count == 0) {
/* first word: preserve spaces */
col += space_size + word_size;
} else {
/* insert space single space the word */
if (offset == par_end
|| (col + 1 + word_size > s->b->fill_column)) {
/* XXX: should check if separator is a newline */
eb_delete_uchar(s->b, chunk_start);
chunk_start += eb_insert_uchar(s->b, chunk_start, '\n');
if (offset < par_end) {
/* indent */
int nb = eb_insert_spaces(s->b, offset, indent_size);
chunk_start += nb;
word_start += nb;
offset += nb;
par_end += nb;
}
col = word_size + indent_size;
} else {
/* XXX: should check if separator is a space */
eb_delete_uchar(s->b, chunk_start);
chunk_start += eb_insert_uchar(s->b, chunk_start, ' ');
col += 1 + word_size;
}
/* remove all other spaces if needed */
n = word_start - chunk_start;
if (n > 0) {
eb_delete(s->b, chunk_start, n);
offset -= n;
par_end -= n;
}
}
word_count++;
}
}
/* Upper / lower / capital case functions. Update offset, return isword */
/* arg: -1=lower-case, +1=upper-case, +2=capital-case */
static int eb_changecase(EditBuffer *b, int *offsetp, int arg)
{
int offset0, ch, ch1, len;
char buf[MAX_CHAR_BYTES];
offset0 = *offsetp;
ch = eb_nextc(b, offset0, offsetp);
if (!qe_isword(ch))
return 0;
if (arg > 0)
ch1 = qe_toupper(ch);
else
ch1 = qe_tolower(ch);
if (ch != ch1) {
len = eb_encode_uchar(b, buf, ch1);
/* replaced char may have a different encoding len from
* original char, such as dotless i in Turkish. */
eb_replace(b, offset0, *offsetp - offset0, buf, len);
*offsetp = offset0 + len;
}
return 1;
}
void do_changecase_word(EditState *s, int arg)
{
int offset;
word_right(s, 1);
for (offset = s->offset;;) {
if (offset >= s->b->total_size)
break;
if (!eb_changecase(s->b, &offset, arg))
break;
s->offset = offset;
if (arg == 2)
arg = -2;
}
}
void do_changecase_region(EditState *s, int arg)
{
int offset;
/* deactivate region hilite */
s->region_style = 0;
/* WARNING: during case change, the region offsets can change, so
it is not so simple ! */
/* XXX: if last char of region changes width, offset will move */
offset = min(s->offset, s->b->mark);
for (;;) {
if (offset >= max(s->offset, s->b->mark))
break;
if (eb_changecase(s->b, &offset, arg)) {
if (arg == 2)
arg = -arg;
} else {
if (arg == -2)
arg = -arg;
}
}
}
void do_delete_char(EditState *s, int argval)
{
int endpos;
if (s->b->flags & BF_READONLY)
return;
/* Delete hilighted region, if any.
* do_append_next_kill silently ignored.
*/
if (do_delete_selection(s))
return;
if (argval == NO_ARG) {
if (s->qe_state->last_cmd_func != (CmdFunc)do_append_next_kill) {
eb_delete_uchar(s->b, s->offset);
return;
}
argval = 1;
}
/* save kill if numeric argument given */
endpos = eb_skip_chars(s->b, s->offset, argval);
do_kill(s, s->offset, endpos, argval, 0);
}
void do_backspace(EditState *s, int argval)
{
int offset1;
#ifndef CONFIG_TINY
if (s->b->flags & BF_PREVIEW) {
do_scroll_up_down(s, -2);