elm_parser/counter/
counter_instance.rs

1use super::counter_types::{CounterType, CounterValueType};
2use numerals::roman::Roman;
3
4#[derive(Debug, Clone)]
5pub struct CounterInstance {
6    pub counter_type: CounterType,
7    pub name: String,
8    pub current_value: CounterValueType,
9    pub scope: usize,
10}
11
12impl CounterInstance {
13    pub fn new(name: &str, _type: &str, scope: usize, default_value: Option<&str>) -> Self {
14        Self {
15            name: name.to_string(),
16            counter_type: CounterType::from_str(_type).unwrap(),
17            current_value: CounterValueType::from_str(_type, default_value),
18            scope,
19        }
20    }
21
22    pub fn increment(&mut self) {
23        match self.counter_type {
24            CounterType::ARABIC => {
25                if let CounterValueType::ARABIC(i) = self.current_value {
26                    self.current_value = CounterValueType::ARABIC(i + 1)
27                }
28            }
29            CounterType::ROMAN => {
30                if let CounterValueType::ROMAN(roman) = &self.current_value {
31                    self.current_value = if roman == "0" {
32                        CounterValueType::ROMAN("i".to_string())
33                    } else {
34                        let mut num: i16 =
35                            Roman::parse(&roman).expect("unvalid roman chars").value();
36                        num += 1;
37                        let incremented_roman = format!("{:x}", Roman::from(num));
38                        CounterValueType::ROMAN(incremented_roman)
39                    }
40                }
41            }
42            CounterType::ALPHABITICAL => {}
43        }
44    }
45
46    pub fn decrement(&mut self) {
47        match self.counter_type {
48            CounterType::ARABIC => {
49                if let CounterValueType::ARABIC(i) = self.current_value {
50                    self.current_value = CounterValueType::ARABIC(i - 1)
51                }
52            }
53            CounterType::ROMAN => {
54                if let CounterValueType::ROMAN(roman) = &self.current_value {
55                    self.current_value = if roman == "i" {
56                        CounterValueType::ROMAN("0".to_string())
57                    } else {
58                        if let Some(paresed) = Roman::parse(&roman) {
59                            let mut num: i16 = paresed.value();
60                            num -= 1;
61                            let incremented_roman = format!("{:x}", Roman::from(num));
62                            CounterValueType::ROMAN(incremented_roman)
63                        } else {
64                            CounterValueType::ROMAN("-".to_string())
65                        }
66                    }
67                }
68            }
69            CounterType::ALPHABITICAL => {}
70        }
71    }
72}
elm_parser/counter/counter_instance.rs

elm_parser/counter/
counter_instance.rs
