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Nicer token skip

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This commit is contained in:
Joshua Barretto 2025-09-22 13:52:22 +01:00
parent 1f7a0c48e8
commit 95c894f825
1 changed files with 30 additions and 15 deletions
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45
src/state.rs
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@ -325,16 +325,24 @@ impl Buffer {
cursor.pos = if !retain_base && cursor.base < cursor.pos {
cursor.base
} else if let (true, Some(mut pos)) = (word, cursor.pos.checked_sub(1)) {
let class = self.text.chars().get(pos).copied().map(classify);
let mut class = self.text.chars().get(pos).copied().and_then(classify);
loop {
pos = match pos.checked_sub(1) {
Some(pos)
if self.text.chars().get(pos).copied().map(classify) == class =>
(class, pos) = if let Some(new_pos) = pos.checked_sub(1) {
let Some(new_class) =
self.text.chars().get(new_pos).copied().map(classify)
else {
break pos;
};
if (class.is_some() && new_class.is_none())
|| matches!((class, new_class), (Some(c), Some(n)) if c != n)
{
pos
break pos;
} else {
(new_class, new_pos)
}
_ => break pos,
}
} else {
break pos;
};
}
} else {
cursor.pos.saturating_sub(dist[0])
@ -346,13 +354,19 @@ impl Buffer {
cursor.base
} else if word {
let mut pos = cursor.pos;
let class = self.text.chars().get(pos).copied().map(classify);
let mut class = self.text.chars().get(pos).copied().and_then(classify);
loop {
pos = if self.text.chars().get(pos).copied().map(classify) == class {
pos + 1
} else {
let Some(new_class) = self.text.chars().get(pos).copied().map(classify)
else {
break pos;
};
(class, pos) = if (class.is_some() && new_class.is_none())
|| matches!((class, new_class), (Some(c), Some(n)) if c != n)
{
break pos;
} else {
(new_class, pos + 1)
};
}
} else {
(cursor.pos + dist[0]).min(self.text.chars.len())
@ -559,11 +573,12 @@ impl Buffer {
}
// CLassify the character by property
fn classify(c: char) -> u8 {
fn classify(c: char) -> Option<u8> {
match c {
// c if c.is_ascii_whitespace() => 0,
c if c.is_alphanumeric() || c == '_' => 1,
_ => 2,
' ' | '\t' => None,
'\n' => Some(0),
c if c.is_alphanumeric() || c == '_' => Some(1),
_ => Some(2),
}
}