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patch 9.0.0040: use of set_chars_option() is confusing

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Problem:    Use of set_chars_option() is confusing.
Solution:   Add "apply" argument to store the result or not.  Merge similar
            code.
This commit is contained in:
Bram Moolenaar
2022-07-04 21:03:36 +01:00
parent 4c99e622dd
commit b67f0c8e49
6 changed files with 66 additions and 61 deletions
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48
src/screen.c
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@@ -4843,11 +4843,13 @@ get_encoded_char_adv(char_u **p)
/*
* Handle setting 'listchars' or 'fillchars'.
* "varp" points to either the global or the window-local value.
* When "apply" is FALSE do not store the flags, only check for errors.
* Assume monocell characters.
* Returns error message, NULL if it's OK.
*/
char *
set_chars_option(win_T *wp, char_u **varp)
set_chars_option(win_T *wp, char_u **varp, int apply)
{
int round, i, len, len2, entries;
char_u *p, *s;
@@ -4856,11 +4858,16 @@ set_chars_option(win_T *wp, char_u **varp)
char_u *last_lmultispace = NULL; // Last occurrence of "leadmultispace:"
int multispace_len = 0; // Length of lcs-multispace string
int lead_multispace_len = 0; // Length of lcs-leadmultispace string
int is_listchars = (varp == &p_lcs || varp == &wp->w_p_lcs);
char_u *value = *varp;
struct charstab
{
int *cp;
char *name;
};
struct charstab *tab;
static fill_chars_T fill_chars;
static struct charstab filltab[] =
{
@@ -4874,6 +4881,7 @@ set_chars_option(win_T *wp, char_u **varp)
{&fill_chars.diff, "diff"},
{&fill_chars.eob, "eob"},
};
static lcs_chars_T lcs_chars;
struct charstab lcstab[] =
{
@@ -4891,22 +4899,21 @@ set_chars_option(win_T *wp, char_u **varp)
{NULL, "conceal"},
#endif
};
struct charstab *tab;
if (varp == &p_lcs || varp == &wp->w_p_lcs)
if (is_listchars)
{
tab = lcstab;
CLEAR_FIELD(lcs_chars);
entries = ARRAY_LENGTH(lcstab);
if (varp == &wp->w_p_lcs && wp->w_p_lcs[0] == NUL)
varp = &p_lcs;
value = p_lcs; // local value is empty, us the global value
}
else
{
tab = filltab;
entries = ARRAY_LENGTH(filltab);
if (varp == &wp->w_p_fcs && wp->w_p_fcs[0] == NUL)
varp = &p_fcs;
value = p_fcs; // local value is empty, us the global value
}
// first round: check for valid value, second round: assign values
@@ -4915,7 +4922,7 @@ set_chars_option(win_T *wp, char_u **varp)
if (round > 0)
{
// After checking that the value is valid: set defaults.
if (varp == &p_lcs || varp == &wp->w_p_lcs)
if (is_listchars)
{
for (i = 0; i < entries; ++i)
if (tab[i].cp != NULL)
@@ -4926,7 +4933,8 @@ set_chars_option(win_T *wp, char_u **varp)
if (multispace_len > 0)
{
lcs_chars.multispace = ALLOC_MULT(int, multispace_len + 1);
lcs_chars.multispace[multispace_len] = NUL;
if (lcs_chars.multispace != NULL)
lcs_chars.multispace[multispace_len] = NUL;
}
else
lcs_chars.multispace = NULL;
@@ -4953,7 +4961,7 @@ set_chars_option(win_T *wp, char_u **varp)
fill_chars.eob = '~';
}
}
p = *varp;
p = value;
while (*p)
{
for (i = 0; i < entries; ++i)
@@ -5007,7 +5015,7 @@ set_chars_option(win_T *wp, char_u **varp)
{
len = (int)STRLEN("multispace");
len2 = (int)STRLEN("leadmultispace");
if ((varp == &p_lcs || varp == &wp->w_p_lcs)
if (is_listchars
&& STRNCMP(p, "multispace", len) == 0
&& p[len] == ':'
&& p[len + 1] != NUL)
@@ -5044,7 +5052,7 @@ set_chars_option(win_T *wp, char_u **varp)
}
}
else if ((varp == &p_lcs || varp == &wp->w_p_lcs)
else if (is_listchars
&& STRNCMP(p, "leadmultispace", len2) == 0
&& p[len2] == ':'
&& p[len2 + 1] != NUL)
@@ -5090,15 +5098,23 @@ set_chars_option(win_T *wp, char_u **varp)
}
}
if (tab == lcstab)
if (apply)
{
vim_free(wp->w_lcs_chars.multispace);
vim_free(wp->w_lcs_chars.leadmultispace);
wp->w_lcs_chars = lcs_chars;
if (is_listchars)
{
vim_free(wp->w_lcs_chars.multispace);
vim_free(wp->w_lcs_chars.leadmultispace);
wp->w_lcs_chars = lcs_chars;
}
else
{
wp->w_fill_chars = fill_chars;
}
}
else
else if (is_listchars)
{
wp->w_fill_chars = fill_chars;
vim_free(lcs_chars.multispace);
vim_free(lcs_chars.leadmultispace);
}
return NULL; // no error