Separate Yew Platform

packages/yew-platform/Cargo.toml

@@ -0,0 +1,40 @@
+[package]
+name = "yew-platform"
+version = "0.1.0"
+authors = ["Kaede Hoshikawa <futursolo@icloud.com>"]
+edition = "2021"
+license = "MIT OR Apache-2.0"
+readme = "README.md"
+keywords = ["yew", "futures", "async", "io"]
+categories = ["asynchronous"]
+description = "Yew's asynchronous runtime."
+repository = "https://github.com/yewstack/yew"
+rust-version = "1.60.0"
+
+[dependencies]
+futures = { version = "0.3", default-features = false, features = ["std", "async-await"] }
+pin-project = "1.0.11"
+pinned = "0.1.0"
+
+[target.'cfg(target_arch = "wasm32")'.dependencies]
+# we move wasm-bindgen here so no promise-based spawn_local can present for
+# non-wasm32 targets.
+wasm-bindgen-futures = "0.4"
+gloo = "0.8"
+
+[target.'cfg(not(target_arch = "wasm32"))'.dependencies]
+num_cpus = { version = "1.13", optional = true }
+once_cell = "1"
+tokio = { version = "1.21.1", features = ["rt", "time"], optional = true }
+tokio-stream = { version = "0.1", features = ["time"], optional = true }
+
+[target.'cfg(not(target_arch = "wasm32"))'.dev-dependencies]
+tokio = { version = "1.19", features = ["full"] }
+
+[features]
+tokio = ["dep:tokio", "dep:num_cpus", "dep:tokio-stream"]
+default = []
+
+[package.metadata.docs.rs]
+all-features = true
+rustdoc-args = ["--cfg", "documenting"]

packages/yew-platform/README.md

@@ -0,0 +1,3 @@
+# yew-platform
+
+Runtime for the [Yew](https://github.com/yewstack/yew) framework.

packages/yew/src/platform/fmt/buffer.rs → packages/yew-platform/src/fmt/buffer.rs

@@ -80,7 +80,8 @@ impl Write for Inner {
 /// An asynchronous [`String`] writer.
 ///
 /// This type implements [`fmt::Write`] and can be used with [`write!`] and [`writeln!`].
-pub(crate) struct BufWriter {
+#[derive(Debug)]
+pub struct BufWriter {
     inner: Rc<UnsafeCell<Inner>>,
 }
 
@@ -145,7 +146,8 @@ impl Drop for BufWriter {
 }
 
 /// An asynchronous [`String`] reader.
-pub(crate) struct BufReader {
+#[derive(Debug)]
+pub struct BufReader {
     inner: Rc<UnsafeCell<Inner>>,
 }
 
@@ -198,7 +200,7 @@ impl FusedStream for BufReader {
 }
 
 /// Creates an asynchronous buffer that operates over String.
-pub(crate) fn buffer() -> (BufWriter, BufReader) {
+pub fn buffer() -> (BufWriter, BufReader) {
     let inner = Rc::new(UnsafeCell::new(Inner::new()));
 
     let w = {

packages/yew/src/platform/fmt/mod.rs → packages/yew-platform/src/fmt/mod.rs

@@ -9,14 +9,15 @@ use pin_project::pin_project;
 
 mod buffer;
 
-pub(crate) use buffer::{buffer, BufReader, BufWriter};
+pub use buffer::{buffer, BufReader, BufWriter};
 
 /// A buffered asynchronous [`String`] [`Stream`].
 ///
 /// A BufStream combines a BufWriter - BufReader pair and a resolving future that writes to the
 /// buffer and polls the future alongside the buffer.
+#[derive(Debug)]
 #[pin_project]
-pub(crate) struct BufStream<F>
+pub struct BufStream<F>
 where
     F: Future<Output = ()>,
 {

packages/yew/src/platform/mod.rs → packages/yew-platform/src/lib.rs

@@ -1,4 +1,4 @@
-//! Compatibility between JavaScript Runtime and Native Runtimes.
+//! Yew's compatibility between JavaScript Runtime and Native Runtimes.
 //!
 //! When designing components and libraries that works on both WebAssembly targets backed by
 //! JavaScript Runtime and non-WebAssembly targets with Native Runtimes. Developers usually face
@@ -40,13 +40,21 @@
 //! transparent to the future that executes the renderer. The Yew application still needs to use
 //! `tokio`'s timer, IO and task synchronisation primitives.
 
+#![cfg_attr(documenting, feature(doc_cfg))]
+#![cfg_attr(documenting, feature(doc_auto_cfg))]
+#![deny(
+    missing_docs,
+    missing_debug_implementations,
+    bare_trait_objects,
+    anonymous_parameters,
+    elided_lifetimes_in_paths
+)]
+
 use std::future::Future;
 use std::io::Result;
 use std::marker::PhantomData;
 
-#[cfg(feature = "ssr")]
-pub(crate) mod fmt;
-
+pub mod fmt;
 pub mod pinned;
 pub mod time;
 

packages/yew-platform/src/pinned.rs

@@ -0,0 +1,14 @@
+//! Task synchronisation primitives for pinned tasks.
+//!
+//! This module provides the following task synchronisation mechanisms for `!Send` futures:
+//!
+//! - [`Barrier`]: Ensures multiple tasks to wait until all tasks have reached a point in the
+//! program before continuing execution of all together.
+//! - [`RwLock`]: Provides a mutual exclusion mechanism which allows multiple readers at the same
+//! time, while allowing only one writer at a time.
+//! - [`mpsc`]: A channel that supports sending multiple values from multiple producers to a single
+//! receiver.
+//! - [`oneshot`]: A channel to send one single value from a producer to a receiver.
+
+#[doc(inline)]
+pub use pinned::*;

packages/yew/src/platform/rt_tokio/local_worker.rs → packages/yew-platform/src/rt_tokio/local_worker.rs

@@ -149,9 +149,9 @@ mod tests {
     use futures::channel::oneshot;
     use tokio::test;
     use tokio::time::timeout;
-    use yew::platform::Runtime;
 
     use super::*;
+    use crate::Runtime;
 
     #[test]
     async fn test_local_handle_exists() {

packages/yew/src/platform/time.rs → packages/yew-platform/src/time.rs

@@ -5,7 +5,7 @@ use std::time::Duration;
 
 use futures::stream::Stream;
 
-use crate::platform::imp::time as imp;
+use crate::imp::time as imp;
 
 /// Waits until duration has elapsed.
 #[inline(always)]

packages/yew/Cargo.toml

@@ -25,14 +25,21 @@ slab = "0.4"
 wasm-bindgen = "0.2"
 yew-macro = { version = "^0.19.0", path = "../yew-macro" }
 thiserror = "1.0"
-futures = { version = "0.3", default-features = false, features = ["std", "async-await"] }
+futures = { version = "0.3", default-features = false, features = ["std"] }
 html-escape = { version = "0.2.9", optional = true }
 implicit-clone = { version = "0.3", features = ["map"] }
 base64ct = { version = "1.5.0", features = ["std"], optional = true }
 bincode = { version = "1.3.3", optional = true }
 serde = { version = "1", features = ["derive"] }
 tracing = "0.1.36"
-pin-project = "1.0.11"
+yew-platform = { version = "0.1.0", path = "../yew-platform" }
+
+[target.'cfg(target_arch = "wasm32")'.dependencies]
+wasm-bindgen-futures = "0.4"
+
+[target.'cfg(not(target_arch = "wasm32"))'.dependencies]
+# We still need tokio as we have docs linked to it.
+tokio = { version = "1.19", features = ["rt"] }
 
 [dependencies.web-sys]
 version = "^0.3.59"
@@ -69,21 +76,12 @@ features = [
   "SubmitEvent"
 ]
 
-[target.'cfg(target_arch = "wasm32")'.dependencies]
-# we move it here so no promise-based spawn_local can present for
-# non-wasm32 targets.
-wasm-bindgen-futures = "0.4"
-
-[target.'cfg(not(target_arch = "wasm32"))'.dependencies]
-num_cpus = { version = "1.13", optional = true }
-once_cell = "1"
-tokio = { version = "1.21.1", features = ["rt", "time"], optional = true }
-tokio-stream = { version = "0.1", features = ["time"], optional = true }
+[target.'cfg(not(target_arch = "wasm32"))'.dev-dependencies]
+tokio = { version = "1.19", features = ["full"] }
 
 [dev-dependencies]
 wasm-bindgen-test = "0.3"
 gloo = { version = "0.8", features = ["futures"] }
-wasm-bindgen-futures = "0.4"
 rustversion = "1"
 trybuild = "1"
 
@@ -95,15 +93,12 @@ features = [
 ]
 
 [features]
-tokio = ["dep:tokio", "dep:num_cpus", "dep:tokio-stream"]
+tokio = ["yew-platform/tokio"]
 ssr = ["dep:html-escape", "dep:base64ct", "dep:bincode"]
 csr = []
 hydration = ["csr", "dep:bincode"]
 default = []
 
-[target.'cfg(not(target_arch = "wasm32"))'.dev-dependencies]
-tokio = { version = "1.19", features = ["full"] }
-
 [package.metadata.docs.rs]
 all-features = true
 rustdoc-args = ["--cfg", "documenting"]

packages/yew/src/lib.rs

@@ -280,7 +280,8 @@ pub mod context;
 mod dom_bundle;
 pub mod functional;
 pub mod html;
-pub mod platform;
+#[doc(inline)]
+pub use yew_platform as platform;
 pub mod scheduler;
 mod sealed;
 #[cfg(feature = "ssr")]