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schema: make wrap_text less awkward

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Signed-off-by: Wolfgang Bumiller <w.bumiller@proxmox.com>
This commit is contained in:
Wolfgang Bumiller 2024-06-27 11:44:55 +02:00
parent dc7273e888
commit f02ce77ad6
1 changed files with 43 additions and 8 deletions
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51
proxmox-schema/src/format.rs
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@ -37,6 +37,23 @@ pub fn wrap_text(
text: &str,
columns: usize,
) -> String {
// first we condense paragraphs by normalizing whitespace:
let paragraphs = text
.split("\n\n")
.map(|paragraph| {
paragraph
.split_ascii_whitespace()
.fold(String::new(), |mut acc, word| {
if !acc.is_empty() {
acc.push(' ');
}
acc.push_str(word);
acc
})
})
.collect::<Vec<_>>();
// Then we wrap each paragraph with textwrap.
let wrap_options1 = textwrap::Options::new(columns)
.initial_indent(initial_indent)
.subsequent_indent(subsequent_indent);
@ -45,15 +62,15 @@ pub fn wrap_text(
.initial_indent(subsequent_indent)
.subsequent_indent(subsequent_indent);
text.split("\n\n")
.map(|p| p.trim())
paragraphs
.into_iter()
.filter(|p| !p.is_empty())
.fold(String::new(), |mut acc, p| {
if acc.is_empty() {
acc.push_str(&textwrap::wrap(p, &wrap_options1).join("\n"));
acc.push_str(&textwrap::wrap(&p, &wrap_options1).join("\n"));
} else {
acc.push_str("\n\n");
acc.push_str(&textwrap::wrap(p, &wrap_options2).join("\n"));
acc.push_str(&textwrap::wrap(&p, &wrap_options2).join("\n"));
}
acc
})
@ -61,11 +78,29 @@ pub fn wrap_text(
#[test]
fn test_wrap_text() {
let text = "Command. This may be a list in order to spefify nested sub-commands.";
let expect = " Command. This may be a list in order to spefify nested sub-\n commands.";
let text = "\
Command. This may be a list in order to specify nested subcommands.
let indent = " ";
let wrapped = wrap_text(indent, indent, text, 80);
A
second
paragraph which will be formatted differently, consisting of both lines
which are too long and ones which are
too
short.";
let expect = " \
Command. This may be a list in order to specify nested
subcommands.
A second paragraph which will be formatted
differently, consisting of both lines which are too
long and ones which are too short.\
";
let wrapped = wrap_text(" ", " ", text, 60);
eprintln!("[[[[\n{expect}]]]]");
eprintln!("[[[[\n{wrapped}]]]]");
assert_eq!(wrapped, expect);
}