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Add n: modifier to get length of a format, also automatically expand 

variable name arguments again if they contain a #{.
pull/2378/head
nicm 2020-08-20 16:57:40 +00:00
parent d8b6560cbf
commit d0957529ed
2 changed files with 29 additions and 11 deletions
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37
format.c
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@ -94,6 +94,7 @@ format_job_cmp(struct format_job *fj1, struct format_job *fj2)
#define FORMAT_WINDOWS 0x100
#define FORMAT_PANES 0x200
#define FORMAT_PRETTY 0x400
#define FORMAT_LENGTH 0x800
/* Limit on recursion. */
#define FORMAT_LOOP_LIMIT 10
@ -1647,7 +1648,7 @@ format_build_modifiers(struct format_tree *ft, const char **s, u_int *count)
/*
* Modifiers are a ; separated list of the forms:
* l,m,C,b,d,t,q,E,T,S,W,P,<,>
* l,m,C,b,d,n,t,q,E,T,S,W,P,<,>
* =a
* =/a
* =/a/
@ -1664,7 +1665,7 @@ format_build_modifiers(struct format_tree *ft, const char **s, u_int *count)
cp++;
/* Check single character modifiers with no arguments. */
if (strchr("lbdqETSWP<>", cp[0]) != NULL &&
if (strchr("lbdnqETSWP<>", cp[0]) != NULL &&
format_is_end(cp[1])) {
format_add_modifier(&list, count, cp, 1, NULL, 0);
cp++;
@ -2122,6 +2123,9 @@ format_replace(struct format_tree *ft, const char *key, size_t keylen,
case 'd':
modifiers |= FORMAT_DIRNAME;
break;
case 'n':
modifiers |= FORMAT_LENGTH;
break;
case 't':
modifiers |= FORMAT_TIMESTRING;
if (fm->argc < 1)
@ -2301,13 +2305,17 @@ format_replace(struct format_tree *ft, const char *key, size_t keylen,
if (value == NULL)
value = xstrdup("");
} else {
/* Neither: look up directly. */
value = format_find(ft, copy, modifiers, time_format);
if (value == NULL) {
format_log(ft, "format '%s' not found", copy);
value = xstrdup("");
} else
format_log(ft, "format '%s' found: %s", copy, value);
if (strstr(copy, "#{") != 0) {
format_log(ft, "expanding inner format '%s'", copy);
value = format_expand(ft, copy);
} else {
value = format_find(ft, copy, modifiers, time_format);
if (value == NULL) {
format_log(ft, "format '%s' not found", copy);
value = xstrdup("");
} else
format_log(ft, "format '%s' found: %s", copy, value);
}
}
done:
@ -2316,8 +2324,7 @@ done:
new = format_expand(ft, value);
free(value);
value = new;
}
else if (modifiers & FORMAT_EXPANDTIME) {
} else if (modifiers & FORMAT_EXPANDTIME) {
new = format_expand_time(ft, value);
free(value);
value = new;
@ -2371,6 +2378,14 @@ done:
format_log(ft, "applied padding width %d: %s", width, value);
}
/* Replace with the length if needed. */
if (modifiers & FORMAT_LENGTH) {
xasprintf(&new, "%zu", strlen(value));
free(value);
value = new;
format_log(ft, "replacing with length: %s", new);
}
/* Expand the buffer and copy in the value. */
valuelen = strlen(value);
while (*len - *off < valuelen + 1) {

3
tmux.1
View File

@ -4574,6 +4574,9 @@ pads the string to a given width, for example
.Ql #{p10:pane_title}
will result in a width of at least 10 characters.
A positive width pads on the left, a negative on the right.
.Ql n
expands to the length of the variable, for example
.Ql #{n:window_name} .
.Pp
Prefixing a time variable with
.Ql t:\&