perspective-viewer 4.4.1

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// ┃ Copyright (c) 2017, the Perspective Authors.                              ┃
// ┃ ╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌ ┃
// ┃ This file is part of the Perspective library, distributed under the terms ┃
// ┃ of the [Apache License 2.0](https://www.apache.org/licenses/LICENSE-2.0). ┃
// ┗━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━┛

use yew::prelude::*;

use super::style_cache::StyleCache;

#[derive(Properties, PartialEq)]
pub struct StyleProviderProps {
    pub root: web_sys::HtmlElement,

    #[prop_or(true)]
    pub is_shadow: bool,
    pub children: Children,
}

/// A context which injects any CSS snippet registered within its tree, doing
/// so only once for each unqiue snippet name.
///
/// CSS can be registered within sub-components via the `<LocalStyle>` component
/// and `css!()` resource inlining macro.
pub struct StyleProvider {
    cache: StyleCache,
}

impl Component for StyleProvider {
    type Message = ();
    type Properties = StyleProviderProps;

    fn create(ctx: &Context<Self>) -> Self {
        let cache = StyleCache::new(ctx.props().is_shadow, &ctx.props().root);
        Self { cache }
    }

    fn view(&self, ctx: &Context<Self>) -> Html {
        html! {
            <ContextProvider<StyleCache> context={self.cache.clone()}>
                { for ctx.props().children.iter() }
            </ContextProvider<StyleCache>>
        }
    }
}