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https://github.com/aljazceru/notedeck.git
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6232a8429e
This is a simple and fast function for abbreviating usernames in the timeline. If they are too large they make the timeline too wide. We'll probably need to make this adjustable based on the timeline width, but this is ok for now. Changelog-Added: Abbreviate usernames in timelines
21 lines
600 B
Rust
21 lines
600 B
Rust
#[inline]
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pub fn floor_char_boundary(s: &str, index: usize) -> usize {
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if index >= s.len() {
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s.len()
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} else {
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let lower_bound = index.saturating_sub(3);
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let new_index = s.as_bytes()[lower_bound..=index]
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.iter()
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.rposition(|b| is_utf8_char_boundary(*b));
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// SAFETY: we know that the character boundary will be within four bytes
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unsafe { lower_bound + new_index.unwrap_unchecked() }
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}
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}
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#[inline]
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fn is_utf8_char_boundary(c: u8) -> bool {
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// This is bit magic equivalent to: b < 128 || b >= 192
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(c as i8) >= -0x40
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}
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