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vi: fix faulty undo after autoinsert

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Enable autoinsert and enter the following with an indent of three
spaces:

   line 1
   line 2

Using 'u' to undo the last insert results in:

   line1e 2

The insertion of the indent hasn't been properly recorded.

Since recording insertions is a common operation add a convenience
function, undo_push_insert(), to handle this and use it to record
the autoindent correctly.

function                                             old     new   delta
undo_push_insert                                       -      36     +36
string_insert                                        133     129      -4
char_insert                                          518     473     -45
------------------------------------------------------------------------------
(add/remove: 1/0 grow/shrink: 0/2 up/down: 36/-49)            Total: -13 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 2019-02-03 10:13:17 +00:00 committed by Denys Vlasenko
parent e6503f2f09
commit bb983f30e7
1 changed files with 22 additions and 35 deletions
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57
editors/vi.c
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@ -598,6 +598,7 @@ static void check_context(char); // remember context for '' command
#if ENABLE_FEATURE_VI_UNDO
static void flush_undo_data(void);
static void undo_push(char *, unsigned int, unsigned char); // Push an operation on the undo stack
static void undo_push_insert(char *, int, int); // convenience function
static void undo_pop(void); // Undo the last operation
# if ENABLE_FEATURE_VI_UNDO_QUEUE
static void undo_queue_commit(void); // Flush any queued objects to the undo stack
@ -2011,19 +2012,7 @@ static char *char_insert(char *p, char c, int undo) // insert the char c at 'p'
c = get_one_char();
*p = c;
#if ENABLE_FEATURE_VI_UNDO
switch (undo) {
case ALLOW_UNDO:
undo_push(p, 1, UNDO_INS);
break;
case ALLOW_UNDO_CHAIN:
undo_push(p, 1, UNDO_INS_CHAIN);
break;
# if ENABLE_FEATURE_VI_UNDO_QUEUE
case ALLOW_UNDO_QUEUED:
undo_push(p, 1, UNDO_INS_QUEUED);
break;
# endif
}
undo_push_insert(p, 1, undo);
#else
modified_count++;
#endif /* ENABLE_FEATURE_VI_UNDO */
@ -2051,19 +2040,7 @@ static char *char_insert(char *p, char c, int undo) // insert the char c at 'p'
if (c == '\n')
undo_queue_commit();
# endif
switch (undo) {
case ALLOW_UNDO:
undo_push(p, 1, UNDO_INS);
break;
case ALLOW_UNDO_CHAIN:
undo_push(p, 1, UNDO_INS_CHAIN);
break;
# if ENABLE_FEATURE_VI_UNDO_QUEUE
case ALLOW_UNDO_QUEUED:
undo_push(p, 1, UNDO_INS_QUEUED);
break;
# endif
}
undo_push_insert(p, 1, undo);
#else
modified_count++;
#endif /* ENABLE_FEATURE_VI_UNDO */
@ -2083,7 +2060,7 @@ static char *char_insert(char *p, char c, int undo) // insert the char c at 'p'
p += bias;
q += bias;
#if ENABLE_FEATURE_VI_UNDO
undo_push(p, len, UNDO_INS);
undo_push_insert(p, len, undo);
#endif
memcpy(p, q, len);
p += len;
@ -2392,6 +2369,23 @@ static void undo_push(char *src, unsigned int length, uint8_t u_type) // Add to
modified_count++;
}
static void undo_push_insert(char *p, int len, int undo)
{
switch (undo) {
case ALLOW_UNDO:
undo_push(p, len, UNDO_INS);
break;
case ALLOW_UNDO_CHAIN:
undo_push(p, len, UNDO_INS_CHAIN);
break;
# if ENABLE_FEATURE_VI_UNDO_QUEUE
case ALLOW_UNDO_QUEUED:
undo_push(p, len, UNDO_INS_QUEUED);
break;
# endif
}
}
static void undo_pop(void) // Undo the last operation
{
int repeat;
@ -2665,14 +2659,7 @@ static uintptr_t string_insert(char *p, const char *s, int undo) // insert the s
i = strlen(s);
#if ENABLE_FEATURE_VI_UNDO
switch (undo) {
case ALLOW_UNDO:
undo_push(p, i, UNDO_INS);
break;
case ALLOW_UNDO_CHAIN:
undo_push(p, i, UNDO_INS_CHAIN);
break;
}
undo_push_insert(p, i, undo);
#endif
bias = text_hole_make(p, i);
p += bias;