This is a color-aware counterpart of base::substr().
It works exactly like the original, but keeps the colors
in the substrings. The ANSI escape sequences are ignored when
calculating the positions within the string.
Arguments
- x
Character vector, potentially ANSI styled, or a vector to coerced to character.
- start
Starting index or indices, recycled to match the length of
x.- stop
Ending index or indices, recycled to match the length of
x.
Value
Character vector of the same length as x, containing
the requested substrings. ANSI styles are retained.
See also
Other ANSI string operations:
ansi_align(),
ansi_columns(),
ansi_nchar(),
ansi_strsplit(),
ansi_strtrim(),
ansi_strwrap(),
ansi_substring(),
ansi_toupper(),
ansi_trimws()
Examples
str <- paste(
col_red("red"),
"default",
col_green("green")
)
cat(str, "\n")
#> red default green
cat(ansi_substr(str, 1, 5), "\n")
#> red d
cat(ansi_substr(str, 1, 15), "\n")
#> red default gre
cat(ansi_substr(str, 3, 7), "\n")
#> d def
substr(ansi_strip(str), 1, 5)
#> [1] "red d"
substr(ansi_strip(str), 1, 15)
#> [1] "red default gre"
substr(ansi_strip(str), 3, 7)
#> [1] "d def"
str2 <- paste(
"another",
col_red("multi-", style_underline("style")),
"text"
)
cat(str2, "\n")
#> another multi-style text
cat(ansi_substr(c(str, str2), c(3,5), c(7, 18)), sep = "\n")
#> d def
#> her multi-styl
substr(ansi_strip(c(str, str2)), c(3,5), c(7, 18))
#> [1] "d def" "her multi-styl"