1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44

use crate::vdom::Value;
use std::borrow::Cow;
use std::fmt;

/// css styles
/// style can be converted into an attribute
#[derive(Debug, Clone, PartialEq)]
pub struct Style {
    /// style name such as border, width, etc
    pub name: Cow<'static, str>,
    /// value of the style
    pub value: Value,
}

impl Style {
    /// create a style with name and value
    pub fn new(name: impl Into<Cow<'static, str>>, value: impl Into<Value>) -> Self {
        Style {
            name: name.into(),
            value: value.into(),
        }
    }

    pub(crate) fn merge_to_string<'a>(
        styles: impl IntoIterator<Item = &'a Self>,
    ) -> Option<String> {
        let stringed = styles
            .into_iter()
            .map(|s| format!("{s};"))
            .collect::<Vec<_>>();
        if !stringed.is_empty() {
            let joined = stringed.join("");
            Some(joined)
        } else {
            None
        }
    }
}

impl fmt::Display for Style {
    fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
        write!(f, "{}:{}", self.name, self.value)
    }
}