63 lines
1.7 KiB
Rust
63 lines
1.7 KiB
Rust
use slab::Slab;
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use crate::{
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any_props::AnyProps,
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arena::ElementId,
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bump_frame::BumpFrame,
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nodes::VTemplate,
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scopes::{ComponentPtr, ScopeId, ScopeState},
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VirtualDom,
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};
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impl VirtualDom {
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pub fn new_scope(
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&mut self,
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fn_ptr: ComponentPtr,
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parent: Option<*mut ScopeState>,
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container: ElementId,
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props: Box<dyn AnyProps>,
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) -> ScopeId {
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let entry = self.scopes.vacant_entry();
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let our_arena_idx = entry.key();
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let height = unsafe { parent.map(|f| (*f).height).unwrap_or(0) + 1 };
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entry.insert(ScopeState {
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parent,
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container,
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our_arena_idx,
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height,
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fn_ptr,
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props,
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node_arena_1: BumpFrame::new(50),
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node_arena_2: BumpFrame::new(50),
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render_cnt: Default::default(),
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hook_arena: Default::default(),
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hook_vals: Default::default(),
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hook_idx: Default::default(),
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});
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our_arena_idx
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}
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pub fn run_scope<'a>(&'a mut self, id: ScopeId) -> &'a VTemplate<'a> {
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let scope = &mut self.scopes[id];
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scope.hook_idx.set(0);
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let res = scope.props.render(scope).unwrap();
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let res: VTemplate<'static> = unsafe { std::mem::transmute(res) };
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let frame = match scope.render_cnt % 2 {
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0 => &mut scope.node_arena_1,
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1 => &mut scope.node_arena_2,
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_ => unreachable!(),
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};
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// set the head of the bump frame
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let alloced = frame.bump.alloc(res);
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frame.node.set(alloced);
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// rebind the lifetime now that its stored internally
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unsafe { std::mem::transmute(alloced) }
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}
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}
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