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vi: correct autoindent for 'O' command

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Opening a line above the current line with the 'O' command should
use the current, not previous, line to determine how much to
autoindent.

function                                             old     new   delta
char_insert                                          531     563     +32
do_cmd                                              4746    4723     -23
------------------------------------------------------------------------------
(add/remove: 0/0 grow/shrink: 1/1 up/down: 32/-23)              Total: 9 bytes

Signed-off-by: Ron Yorston <rmy@pobox.com>
Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
This commit is contained in:
Ron Yorston 2021-04-15 12:04:22 +01:00 committed by Denys Vlasenko
parent ac6495f6fb
commit 47c3eaa22f
1 changed files with 29 additions and 12 deletions
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41
editors/vi.c
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@ -286,6 +286,7 @@ struct globals {
int text_size; // size of the allocated buffer
// the rest
#if ENABLE_FEATURE_VI_SETOPTS
smallint vi_setops; // set by setops()
#define VI_AUTOINDENT (1 << 0)
#define VI_ERR_METHOD (1 << 1)
@ -296,6 +297,7 @@ struct globals {
#define err_method (vi_setops & VI_ERR_METHOD) // indicate error with beep or flash
#define ignorecase (vi_setops & VI_IGNORECASE)
#define showmatch (vi_setops & VI_SHOWMATCH )
#define openabove (vi_setops & VI_TABSTOP )
// order of constants and strings must match
#define OPTS_STR \
"ai\0""autoindent\0" \
@ -303,6 +305,15 @@ struct globals {
"ic\0""ignorecase\0" \
"sm\0""showmatch\0" \
"ts\0""tabstop\0"
#define set_openabove() (vi_setops |= VI_TABSTOP)
#define clear_openabove() (vi_setops &= ~VI_TABSTOP)
#else
#define autoindent (0)
#define err_method (0)
#define openabove (0)
#define set_openabove() ((void)0)
#define clear_openabove() ((void)0)
#endif
#if ENABLE_FEATURE_VI_READONLY
smallint readonly_mode;
@ -2130,8 +2141,13 @@ static char *char_insert(char *p, char c, int undo) // insert the char c at 'p'
showmatching(p - 1);
}
if (autoindent && c == '\n') { // auto indent the new line
q = prev_line(p); // use prev line as template
// use current/previous line as template
q = openabove ? p : prev_line(p);
len = strspn(q, " \t"); // space or tab
if (openabove) {
p--; // this replaces dot_prev() in do_cmd()
q += len; // template will be shifted by text_hole_make()
}
if (len) {
uintptr_t bias;
bias = text_hole_make(p, len);
@ -2445,6 +2461,7 @@ static void setops(char *args, int flg_no)
index = 1 << (index >> 1); // convert to VI_bit
if (index & VI_TABSTOP) {
// don't set this bit in vi_setops, it's reused as 'openabove'
int t;
if (!eq || flg_no) // no "=NNN" or it is "notabstop"?
goto bad;
@ -3841,19 +3858,19 @@ static void do_cmd(int c)
dot = next_line(dot);
dot_skip_over_ws();
break;
case 'O': // O- open a empty line above
// 0i\n ESC -i
p = begin_line(dot);
if (p[-1] == '\n') {
case 'O': // O- open an empty line above
dot_begin();
set_openabove();
goto dc3;
case 'o': // o- open an empty line below
dot_end();
dc3:
dot = char_insert(dot, '\n', ALLOW_UNDO);
if (c == 'O' && !autoindent) {
// done in char_insert() for openabove+autoindent
dot_prev();
case 'o': // o- open a empty line below; Yes, I know it is in the middle of the "if (..."
dot_end();
dot = char_insert(dot, '\n', ALLOW_UNDO);
} else {
dot_begin(); // 0
dot = char_insert(dot, '\n', ALLOW_UNDO); // i\n ESC
dot_prev(); // -
}
clear_openabove();
goto dc_i;
break;
case 'R': // R- continuous Replace char