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
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59

//! Decorate content and apply alignment.
use iced_core::{Background, Color};

/// The appearance of a container.
#[derive(Debug, Clone, Copy)]
pub struct Style {
    pub text_color: Option<Color>,
    pub background: Option<Background>,
    pub border_radius: f32,
    pub border_width: f32,
    pub border_color: Color,
}

impl std::default::Default for Style {
    fn default() -> Self {
        Self {
            text_color: None,
            background: None,
            border_radius: 0.0,
            border_width: 0.0,
            border_color: Color::TRANSPARENT,
        }
    }
}

/// A set of rules that dictate the style of a container.
pub trait StyleSheet {
    /// Produces the style of a container.
    fn style(&self) -> Style;
}

struct Default;

impl StyleSheet for Default {
    fn style(&self) -> Style {
        Style {
            text_color: None,
            background: None,
            border_radius: 0.0,
            border_width: 0.0,
            border_color: Color::TRANSPARENT,
        }
    }
}

impl std::default::Default for Box<dyn StyleSheet> {
    fn default() -> Self {
        Box::new(Default)
    }
}

impl<T> From<T> for Box<dyn StyleSheet>
where
    T: 'static + StyleSheet,
{
    fn from(style: T) -> Self {
        Box::new(style)
    }
}