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use std::ops::Deref;
use std::rc::Rc;
use web_sys::Element;
use crate::dom_bundle::BSubtree;
use crate::html::{BaseComponent, NodeRef, Scope, Scoped};
#[cfg(feature = "csr")]
#[derive(Debug)]
pub struct AppHandle<COMP: BaseComponent> {
pub(crate) scope: Scope<COMP>,
}
impl<COMP> AppHandle<COMP>
where
COMP: BaseComponent,
{
#[tracing::instrument(
level = tracing::Level::DEBUG,
name = "mount",
skip(props),
)]
pub(crate) fn mount_with_props(host: Element, props: Rc<COMP::Properties>) -> Self {
clear_element(&host);
let app = Self {
scope: Scope::new(None),
};
let hosting_root = BSubtree::create_root(&host);
app.scope.mount_in_place(
hosting_root,
host,
NodeRef::default(),
NodeRef::default(),
props,
);
app
}
#[tracing::instrument(
level = tracing::Level::DEBUG,
skip_all,
)]
pub fn update(&mut self, new_props: COMP::Properties) {
self.scope.reuse(Rc::new(new_props), NodeRef::default())
}
#[tracing::instrument(
level = tracing::Level::DEBUG,
skip_all,
)]
pub fn destroy(self) {
self.scope.destroy(false)
}
}
impl<COMP> Deref for AppHandle<COMP>
where
COMP: BaseComponent,
{
type Target = Scope<COMP>;
fn deref(&self) -> &Self::Target {
&self.scope
}
}
fn clear_element(host: &Element) {
while let Some(child) = host.last_child() {
host.remove_child(&child).expect("can't remove a child");
}
}
#[cfg(feature = "hydration")]
mod feat_hydration {
use super::*;
use crate::dom_bundle::Fragment;
impl<COMP> AppHandle<COMP>
where
COMP: BaseComponent,
{
#[tracing::instrument(
level = tracing::Level::DEBUG,
name = "hydrate",
skip(props),
)]
pub(crate) fn hydrate_with_props(host: Element, props: Rc<COMP::Properties>) -> Self {
let app = Self {
scope: Scope::new(None),
};
let mut fragment = Fragment::collect_children(&host);
let hosting_root = BSubtree::create_root(&host);
app.scope.hydrate_in_place(
hosting_root,
host.clone(),
&mut fragment,
NodeRef::default(),
Rc::clone(&props),
);
#[cfg(debug_assertions)] app.scope.reuse(props, NodeRef::default());
for node in fragment.iter() {
host.remove_child(node).unwrap();
}
app
}
}
}