tomt_bevycss 0.7.1

Expansion and fixes based on bevy_ecss. Allows for using a slightly wider subset of CSS to interact with Bevy ECS. Now on Bevy 0.13!
Documentation 
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use crate::{
    property::PropertyValues,
    selector::Selector,
};

use bevy::utils::HashMap;
use std::fmt;

/// Represents a single rule inside a style sheet with a [`Selector`] which determines which entities
/// should be applied the [`PropertyValues`].
///
/// Note that this struct holds intermediate data, the final value is parsed by [`Property`](crate::Property) on
/// the first time it's [`system`](crate::Property::apply_system) is invoked.
#[derive(Debug, Clone)]
pub struct StyleRule
{
    /// Selector used to match entities to apply properties.
    pub selector: Selector,

    /// Properties values to be applied on selected entities.
    pub properties: HashMap<String, PropertyValues>,
}

impl StyleRule
{
    pub fn new(
        selector: Selector
    ) -> Self {
        Self{
            selector,
            properties: Default::default(),
        }
    }
}

impl fmt::Display
for StyleRule
{
    fn fmt(
        &self,
        formatter: &mut fmt::Formatter<'_>
    ) -> fmt::Result {
        write!(formatter, "{}", self.selector)
    }
}