note_pen/
key_signature.rs

1use crate::alphabet::Alphabet;
2use crate::Accidental;
3
4#[derive(Clone, Debug)]
5#[cfg_attr(feature = "serde", derive(serde::Serialize, serde::Deserialize))]
6pub struct KeySignature {
7    pub accidental: Accidental,
8    pub notes: Vec<Alphabet>,
9}
10
11impl KeySignature {
12    pub const SHARP_ORDER: [Alphabet; 7] = [
13        Alphabet::F,
14        Alphabet::C,
15        Alphabet::G,
16        Alphabet::D,
17        Alphabet::A,
18        Alphabet::E,
19        Alphabet::B,
20    ];
21    pub const FLAT_ORDER: [Alphabet; 7] = [
22        Alphabet::B,
23        Alphabet::E,
24        Alphabet::A,
25        Alphabet::D,
26        Alphabet::G,
27        Alphabet::C,
28        Alphabet::F,
29    ];
30
31    #[inline]
32    pub fn new_sharp(n: u8) -> Self {
33        Self {
34            accidental: Accidental::Sharp,
35            notes: Self::SHARP_ORDER.iter().take(n as usize).copied().collect(),
36        }
37    }
38
39    #[inline]
40    pub fn new_flat(n: u8) -> Self {
41        Self {
42            accidental: Accidental::Flat,
43            notes: Self::FLAT_ORDER.iter().take(n as usize).copied().collect(),
44        }
45    }
46}
note_pen/key_signature.rs

note_pen/
key_signature.rs
