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use crate::RopeSlice;
pub fn find_nth_next(
text: RopeSlice,
ch: char,
mut pos: usize,
n: usize,
inclusive: bool,
) -> Option<usize> {
if pos >= text.len_chars() {
return None;
}
// start searching right after pos
let mut chars = text.chars_at(pos + 1);
for _ in 0..n {
loop {
let c = chars.next()?;
pos += 1;
if c == ch {
break;
}
}
}
if !inclusive {
pos -= 1;
}
Some(pos)
}
pub fn find_nth_prev(
text: RopeSlice,
ch: char,
mut pos: usize,
n: usize,
inclusive: bool,
) -> Option<usize> {
// start searching right before pos
pos = pos.saturating_sub(1);
let mut chars = text.chars_at(pos);
for _ in 0..n {
loop {
let c = chars.prev()?;
pos = pos.saturating_sub(1);
if c == ch {
break;
}
}
}
if !inclusive {
pos += 1;
}
Some(pos)
}
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