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refactor: extract common functions

pull/12043/head
Nikita Revenco 2024-12-20 11:25:27 +00:00
parent 79d3e10c5c
commit 1821000acd
1 changed files with 108 additions and 108 deletions
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216
helix-core/src/case_conversion.rs
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@ -2,6 +2,114 @@ use crate::Tendril;
// todo: should this be grapheme aware?
pub fn to_simple_case_with(
text: impl Iterator<Item = char>,
buf: &mut Tendril,
transform_char: impl Fn(&char) -> char,
) {
for c in text {
buf.push(transform_char(&c))
}
}
pub fn to_camel_or_pascal_or_title_case_with(
text: impl Iterator<Item = char>,
buf: &mut Tendril,
capitalize_first: bool,
capitalize_rest: bool,
separator: Option<char>,
) {
let mut capitalize_next = capitalize_first;
let mut prev: Option<char> = None;
for c in text.skip_while(|ch| ch.is_whitespace()) {
if c.is_alphanumeric() {
if prev.is_some_and(|p| p.is_lowercase()) && c.is_uppercase() {
capitalize_next = true;
}
if capitalize_next && capitalize_rest {
buf.push(if capitalize_rest {
c.to_ascii_uppercase()
} else {
c
});
capitalize_next = false;
} else {
buf.extend(c.to_lowercase());
}
} else {
capitalize_next = true;
if let Some(separator) = separator {
if prev.is_some_and(|p| p != separator) {
buf.push(separator);
}
}
}
prev = Some(c);
}
}
pub fn to_case_with_separator(
text: impl Iterator<Item = char>,
buf: &mut Tendril,
separator: char,
) {
let mut prev: Option<char> = None;
for c in text.skip_while(|ch| ch.is_whitespace()) {
if c.is_alphanumeric() {
if prev.is_some_and(|p| p.is_lowercase()) && c.is_uppercase()
|| !prev.is_some_and(|p| p.is_alphanumeric()) && !buf.is_empty()
{
buf.push(separator);
}
buf.push(c.to_ascii_lowercase());
}
prev = Some(c);
}
}
pub fn to_alternate_case_with(text: impl Iterator<Item = char>, buf: &mut Tendril) {
to_simple_case_with(text, buf, |c| {
if c.is_uppercase() {
c.to_ascii_lowercase()
} else if c.is_lowercase() {
c.to_ascii_uppercase()
} else {
*c
}
});
}
pub fn to_upper_case_with(text: impl Iterator<Item = char>, buf: &mut Tendril) {
to_simple_case_with(text, buf, char::to_ascii_uppercase);
}
pub fn to_lower_case_with(text: impl Iterator<Item = char>, buf: &mut Tendril) {
to_simple_case_with(text, buf, char::to_ascii_lowercase);
}
pub fn to_kebab_case_with(text: impl Iterator<Item = char>, buf: &mut Tendril) {
to_case_with_separator(text, buf, '-');
}
pub fn to_snake_case_with(text: impl Iterator<Item = char>, buf: &mut Tendril) {
to_case_with_separator(text, buf, '_');
}
pub fn to_title_case_with(text: impl Iterator<Item = char>, buf: &mut Tendril) {
to_camel_or_pascal_or_title_case_with(text, buf, true, true, Some(' '));
}
pub fn to_camel_case_with(text: impl Iterator<Item = char>, buf: &mut Tendril) {
to_camel_or_pascal_or_title_case_with(text, buf, false, true, None);
}
pub fn to_pascal_case_with(text: impl Iterator<Item = char>, buf: &mut Tendril) {
to_camel_or_pascal_or_title_case_with(text, buf, true, true, None);
}
fn to_case<I>(text: I, to_case_with: fn(I, &mut Tendril)) -> Tendril
where
I: Iterator<Item = char>,
@ -43,114 +151,6 @@ pub fn to_snake_case(text: impl Iterator<Item = char>) -> Tendril {
to_case(text, to_snake_case_with)
}
pub fn to_upper_case_with(text: impl Iterator<Item = char>, buf: &mut Tendril) {
for c in text {
for c in c.to_uppercase() {
buf.push(c)
}
}
}
pub fn to_lower_case_with(text: impl Iterator<Item = char>, buf: &mut Tendril) {
for c in text {
for c in c.to_lowercase() {
buf.push(c)
}
}
}
pub fn to_alternate_case_with(text: impl Iterator<Item = char>, buf: &mut Tendril) {
for c in text {
if c.is_uppercase() {
buf.extend(c.to_lowercase())
} else if c.is_lowercase() {
buf.extend(c.to_uppercase())
} else {
buf.push(c)
}
}
}
pub fn to_camel_or_pascal_or_title_case_with(
text: impl Iterator<Item = char>,
buf: &mut Tendril,
capitalize_first: bool,
separator: Option<char>,
) {
let mut capitalize_next = capitalize_first;
let mut prev: Option<char> = None;
for c in text.skip_while(|ch| ch.is_whitespace()) {
if c.is_alphanumeric() {
if prev.is_some_and(|p| p.is_lowercase()) && c.is_uppercase() {
capitalize_next = true;
}
if capitalize_next {
buf.extend(c.to_uppercase());
capitalize_next = false;
} else {
buf.extend(c.to_lowercase());
}
} else {
capitalize_next = true;
if let Some(separator) = separator {
if prev.is_some_and(|p| p != separator) {
buf.push(separator);
}
}
}
prev = Some(c);
}
}
pub fn to_case_with_separator(
text: impl Iterator<Item = char>,
buf: &mut Tendril,
separator: char,
) {
let mut prev_is_lowercase = false;
let mut prev_is_alphanumeric = false;
for c in text.skip_while(|ch| ch.is_whitespace()) {
if c.is_alphanumeric() {
if prev_is_lowercase && c.is_uppercase() || !prev_is_alphanumeric && !buf.is_empty() {
buf.push(separator);
}
buf.push(c.to_ascii_lowercase());
prev_is_lowercase = c.is_lowercase();
prev_is_alphanumeric = true;
} else {
prev_is_lowercase = false;
prev_is_alphanumeric = false;
}
}
if buf.ends_with(separator) {
buf.pop();
}
}
pub fn to_kebab_case_with(text: impl Iterator<Item = char>, buf: &mut Tendril) {
to_case_with_separator(text, buf, '-');
}
pub fn to_snake_case_with(text: impl Iterator<Item = char>, buf: &mut Tendril) {
to_case_with_separator(text, buf, '_');
}
pub fn to_title_case_with(text: impl Iterator<Item = char>, buf: &mut Tendril) {
to_camel_or_pascal_or_title_case_with(text, buf, true, Some(' '));
}
pub fn to_camel_case_with(text: impl Iterator<Item = char>, buf: &mut Tendril) {
to_camel_or_pascal_or_title_case_with(text, buf, false, None);
}
pub fn to_pascal_case_with(text: impl Iterator<Item = char>, buf: &mut Tendril) {
to_camel_or_pascal_or_title_case_with(text, buf, true, None);
}
#[cfg(test)]
mod tests {
use super::*;