feat: context api overhaul

packages/hooks/src/usecontext.rs

@@ -0,0 +1,17 @@
+use dioxus_core::ScopeState;
+
+/// Consume some context in the tree
+pub fn use_context<T: 'static>(cx: &ScopeState) -> Option<&T> {
+    match *cx.use_hook(|| cx.consume_context::<T>().map(|t| t as *const T)) {
+        Some(res) => Some(unsafe { &*res }),
+        None => None,
+    }
+}
+
+/// Provide some context via the tree and return a reference to it
+///
+/// Once the context has been provided, it is immutable. Mutations should be done via interior mutability.
+pub fn use_context_provider<T: 'static>(cx: &ScopeState, f: impl FnOnce() -> T) -> &T {
+    let ptr = *cx.use_hook(|| cx.provide_context(f()) as *const T);
+    unsafe { &*ptr }
+}