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