make desktop compile

packages/core/src/global_context.rs

@@ -0,0 +1,115 @@
+use futures_util::Future;
+
+use crate::{
+    runtime::{with_current_scope, with_runtime},
+    Element, ScopeId, Task,
+};
+
+/// Get the current scope id
+pub fn current_scope_id() -> Option<ScopeId> {
+    with_runtime(|rt| rt.current_scope_id()).flatten()
+}
+
+#[doc(hidden)]
+/// Check if the virtual dom is currently inside of the body of a component
+pub fn vdom_is_rendering() -> bool {
+    with_runtime(|rt| rt.rendering.get()).unwrap_or_default()
+}
+
+/// Consume context from the current scope
+pub fn consume_context<T: 'static + Clone>() -> Option<T> {
+    with_current_scope(|cx| cx.consume_context::<T>()).flatten()
+}
+
+/// Consume context from the current scope
+pub fn consume_context_from_scope<T: 'static + Clone>(scope_id: ScopeId) -> Option<T> {
+    with_runtime(|rt| {
+        rt.get_context(scope_id)
+            .and_then(|cx| cx.consume_context::<T>())
+    })
+    .flatten()
+}
+
+/// Check if the current scope has a context
+pub fn has_context<T: 'static + Clone>() -> Option<T> {
+    with_current_scope(|cx| cx.has_context::<T>()).flatten()
+}
+
+/// Provide context to the current scope
+pub fn provide_context<T: 'static + Clone>(value: T) -> Option<T> {
+    with_current_scope(|cx| cx.provide_context(value))
+}
+
+/// Provide a context to the root scope
+pub fn provide_root_context<T: 'static + Clone>(value: T) -> Option<T> {
+    with_current_scope(|cx| cx.provide_root_context(value))
+}
+
+/// Suspends the current component
+pub fn suspend() -> Option<Element> {
+    with_current_scope(|cx| {
+        cx.suspend();
+    });
+    None
+}
+
+/// Pushes the future onto the poll queue to be polled after the component renders.
+pub fn push_future(fut: impl Future<Output = ()> + 'static) -> Option<Task> {
+    with_current_scope(|cx| cx.push_future(fut))
+}
+
+/// Spawns the future but does not return the [`TaskId`]
+pub fn spawn(fut: impl Future<Output = ()> + 'static) {
+    with_current_scope(|cx| cx.spawn(fut));
+}
+
+/// Spawn a future that Dioxus won't clean up when this component is unmounted
+///
+/// This is good for tasks that need to be run after the component has been dropped.
+pub fn spawn_forever(fut: impl Future<Output = ()> + 'static) -> Option<Task> {
+    with_current_scope(|cx| cx.spawn_forever(fut))
+}
+
+/// Informs the scheduler that this task is no longer needed and should be removed.
+///
+/// This drops the task immediately.
+pub fn remove_future(id: Task) {
+    with_current_scope(|cx| cx.remove_future(id));
+}
+
+/// Store a value between renders. The foundational hook for all other hooks.
+///
+/// Accepts an `initializer` closure, which is run on the first use of the hook (typically the initial render). The return value of this closure is stored for the lifetime of the component, and a mutable reference to it is provided on every render as the return value of `use_hook`.
+///
+/// When the component is unmounted (removed from the UI), the value is dropped. This means you can return a custom type and provide cleanup code by implementing the [`Drop`] trait
+///
+/// # Example
+///
+/// ```
+/// use dioxus_core::ScopeState;
+///
+/// // prints a greeting on the initial render
+/// pub fn use_hello_world() {
+///     once(|| println!("Hello, world!"));
+/// }
+/// ```
+pub fn once<State: Clone + 'static>(initializer: impl FnOnce() -> State) -> State {
+    with_current_scope(|cx| cx.use_hook(initializer)).expect("to be in a dioxus runtime")
+}
+
+/// Get the current render since the inception of this component
+///
+/// This can be used as a helpful diagnostic when debugging hooks/renders, etc
+pub fn generation() -> Option<usize> {
+    with_current_scope(|cx| Some(cx.generation())).expect("to be in a dioxus runtime")
+}
+
+/// Get the parent of the current scope if it exists
+pub fn parent_scope() -> Option<ScopeId> {
+    with_current_scope(|cx| cx.parent_id()).flatten()
+}
+
+/// Mark the current scope as dirty, causing it to re-render
+pub fn needs_update() {
+    with_current_scope(|cx| cx.needs_update());
+}