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|
use codesnake::{Block, CodeWidth, Label, LineIndex};
use core::ops::Range;
fn format<const N: usize>(code: &str, labels: [Label<Range<usize>, &str>; N]) -> String {
let idx = LineIndex::new(code);
let mut prev_empty = false;
let block = Block::new(&idx, labels).unwrap().map_code(|s| {
let sub = usize::from(core::mem::replace(&mut prev_empty, s.is_empty()));
let s = s.replace('\t', " ");
let w = unicode_width::UnicodeWidthStr::width(&*s);
CodeWidth::new(s, core::cmp::max(w, 1) - sub)
});
format!("\n{}\n{block}{}\n", block.prologue(), block.epilogue())
}
fn main() {
// to find the byte positions in this example
for ci in SRC.char_indices() {
println!("{ci:?}");
}
println!("{}", format(SRC, [Label::new(4..7)]));
}
const SRC: &str = "foo bar\nbaz toto\nlook, a fish 🐟 and a hook 🪝\nthis is getting silly";
// nomenclature:
//
// * s: single-line
// * m: multi-line
// * t: text
// * n: no text
#[test]
fn sn() {
assert_eq!(
format(SRC, [Label::new(4..7)]),
"
╭─
│
1 │ foo bar
┆ ───
──╯
"
);
}
#[test]
fn snsn() {
assert_eq!(
format(SRC, [Label::new(0..3), Label::new(4..7)]),
"
╭─
│
1 │ foo bar
┆ ─── ───
──╯
"
);
}
#[test]
fn snmn() {
assert_eq!(
format(SRC, [Label::new(0..3), Label::new(4..11)]),
"
╭─
│
1 │ foo bar
┆ ─── ▲
┆ ╭─────╯
2 │ │ baz toto
┆ │ ▲
┆ │ │
┆ ╰───╯
──╯
"
);
}
#[test]
fn stmtst() {
assert_eq!(
format(
SRC,
[
Label::new(0..3).with_text("some foo"),
Label::new(4..11).with_text("more"),
Label::new(12..16).with_text("a band?")
]
),
"
╭─
│
1 │ foo bar
┆ ─┬─ ▲
┆ │ │
┆ ╰────── some foo
┆ ╭─────╯
2 │ │ baz toto
┆ │ ▲ ──┬─
┆ │ │ │
┆ ╰───┴────── more
┆ │
┆ ╰── a band?
──╯
"
);
}
#[test]
fn mmn() {
assert_eq!(
format(SRC, [Label::new(4..21)]),
"
╭─
│
1 │ foo bar
┆ ▲
┆ ╭─────╯
2 │ │ baz toto
┆ │
3 │ │ look, a fish 🐟 and a hook 🪝
┆ │ ▲
┆ │ │
┆ ╰────╯
──╯
"
);
}
#[test]
fn stst() {
let labels = [
Label::new(25..34).with_text("animal"),
Label::new(41..50).with_text("object"),
];
let output = "
╭─
│
3 │ look, a fish 🐟 and a hook 🪝
┆ ───┬─── ───┬───
┆ │ │
┆ ╰────────────────── animal
┆ │
┆ ╰──── object
──╯
";
assert_eq!(format(SRC, labels), output);
}
#[test]
fn mtmt() {
assert_eq!(
format(
SRC,
[
Label::new(4..11).with_text("ba?"),
Label::new(12..21).with_text("four-letter words")
]
),
"
╭─
│
1 │ foo bar
┆ ▲
┆ ╭─────╯
2 │ │ baz toto
┆ │ ▲ ▲
┆ │ │ │
┆ ╰───┴────── ba?
┆ ╭─────╯
3 │ │ look, a fish 🐟 and a hook 🪝
┆ │ ▲
┆ │ │
┆ ╰────┴────────────────────────── four-letter words
──╯
"
);
}
#[test]
fn empty() {
assert_eq!(
format(SRC, [Label::new(2..2), Label::new(4..7)]),
"
╭─
│
1 │ foo bar
┆ ─ ───
──╯
"
);
}
#[test]
fn the_end() {
assert_eq!(
format(SRC, [Label::new(72..72).with_text("the end")]),
"
╭─
│
4 │ this is getting silly
┆ ┬
┆ │
┆ ╰─ the end
──╯
"
);
}
|
