#![deny(missing_docs)]
mod camel;
mod kebab;
mod mixed;
mod shouty_kebab;
mod shouty_snake;
mod snake;
mod title;
pub use camel::CamelCase;
pub use kebab::KebabCase;
pub use mixed::MixedCase;
pub use shouty_kebab::ShoutyKebabCase;
pub use shouty_snake::{ShoutySnakeCase, ShoutySnekCase};
pub use snake::{SnakeCase, SnekCase};
pub use title::TitleCase;
use unicode_segmentation::UnicodeSegmentation;
fn transform<F, G>(s: &str, with_word: F, boundary: G) -> String
where
F: Fn(&str, &mut String),
G: Fn(&mut String)
{
#[derive(Clone, Copy, PartialEq)]
enum WordMode {
Boundary,
Lowercase,
Uppercase,
}
let mut out = String::new();
let mut first_word = true;
for word in s.unicode_words() {
let mut char_indices = word.char_indices().peekable();
let mut init = 0;
let mut mode = WordMode::Boundary;
while let Some((i, c)) = char_indices.next() {
if c == '_' {
if init == i { init += 1; }
continue
}
if let Some(&(next_i, next)) = char_indices.peek() {
let next_mode = if c.is_lowercase() {
WordMode::Lowercase
} else if c.is_uppercase() {
WordMode::Uppercase
} else {
mode
};
if next == '_' || (next_mode == WordMode::Lowercase && next.is_uppercase()) {
if !first_word { boundary(&mut out); }
with_word(&word[init..next_i], &mut out);
first_word = false;
init = next_i;
mode = WordMode::Boundary;
} else if mode == WordMode::Uppercase && c.is_uppercase() && next.is_lowercase() {
if !first_word { boundary(&mut out); }
else { first_word = false; }
with_word(&word[init..i], &mut out);
init = i;
mode = WordMode::Boundary;
} else {
mode = next_mode;
}
} else {
if !first_word { boundary(&mut out); }
else { first_word = false; }
with_word(&word[init..], &mut out);
break;
}
}
}
out
}
fn lowercase(s: &str, out: &mut String) {
let mut chars = s.chars().peekable();
while let Some(c) = chars.next() {
if c == 'Σ' && chars.peek().is_none() {
out.push('ς');
} else {
out.extend(c.to_lowercase());
}
}
}
fn uppercase(s: &str, out: &mut String ) {
for c in s.chars() {
out.extend(c.to_uppercase())
}
}
fn capitalize(s: &str, out: &mut String) {
let mut char_indices = s.char_indices();
if let Some((_, c)) = char_indices.next() {
out.extend(c.to_uppercase());
if let Some((i, _)) = char_indices.next() {
lowercase(&s[i..], out);
}
}
}