notation_core/
signature.rs

1use std::fmt::Display;
2
3use serde::{Deserialize, Serialize};
4
5use crate::prelude::{Unit, Units};
6
7#[derive(Copy, Clone, PartialEq, PartialOrd, Serialize, Deserialize, Debug)]
8pub struct Beats(pub f32);
9
10#[derive(Copy, Clone, PartialEq, Eq, Serialize, Deserialize, Debug)]
11pub struct Signature {
12    pub beat_unit: Unit,
13    pub bar_beats: u8,
14}
15impl Display for Signature {
16    fn fmt(&self, f: &mut std::fmt::Formatter<'_>) -> std::fmt::Result {
17        write!(f, "{}/{}", self.bar_beats, match self.beat_unit {
18            Unit::Whole => 1,
19            Unit::Half => 2,
20            Unit::Quarter => 4,
21            Unit::Eighth => 8,
22            Unit::Sixteenth => 16,
23            Unit::ThirtySecondth => 32,
24        })
25    }
26}
27
28impl Signature {
29    pub fn new(beat_unit: Unit, bar_beats: u8) -> Self {
30        Self {
31            beat_unit,
32            bar_beats,
33        }
34    }
35}
36
37impl Signature {
38    pub const _4_4: Self = Self {
39        beat_unit: Unit::Quarter,
40        bar_beats: 4,
41    };
42    pub const _3_4: Self = Self {
43        beat_unit: Unit::Quarter,
44        bar_beats: 3,
45    };
46    pub const _2_4: Self = Self {
47        beat_unit: Unit::Quarter,
48        bar_beats: 2,
49    };
50    pub const _6_8: Self = Self {
51        beat_unit: Unit::Eighth,
52        bar_beats: 6,
53    };
54}
55
56impl From<f32> for Beats {
57    fn from(v: f32) -> Self {
58        Self(v)
59    }
60}
61
62impl From<Signature> for Units {
63    fn from(v: Signature) -> Self {
64        Self::from(Units::from(v.beat_unit).0 * (v.bar_beats as f32))
65    }
66}
67
68impl From<Signature> for Beats {
69    fn from(v: Signature) -> Self {
70        Self::from(v.bar_beats as f32)
71    }
72}
73
74impl From<(Signature, Units)> for Beats {
75    fn from((signature, units): (Signature, Units)) -> Self {
76        Self::from(units.0 / Units::from(signature.beat_unit).0)
77    }
78}
notation_core/signature.rs

notation_core/
signature.rs
