git.iko.soy/dodrio
on master help sign in
swap
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46 files changed+1715−1062
since splitsnapshots
unifiedsplit
.travis.yml+18−12 Cargo.lock+500−504 Cargo.toml+16−16 README.md+9 benches/benches.rs+13−24 crates/js-api/Cargo.toml+6−7 crates/js-api/src/lib.rs+13−10 examples/counter/Cargo.toml+5−5 examples/counter/src/lib.rs+3−3 examples/game-of-life/Cargo.toml+5−6 examples/game-of-life/src/lib.rs+18−13 examples/hello-world/Cargo.toml+3−3 examples/hello-world/src/lib.rs+2−2 examples/input-form/Cargo.toml+3−3 examples/input-form/src/lib.rs+2−2 examples/js-component/Cargo.toml+3−3 examples/js-component/src/lib.rs+3−3 examples/moire/Cargo.toml+8−9 examples/moire/src/lib.rs+6−7 examples/sierpinski-triangle/Cargo.toml+5−6 examples/sierpinski-triangle/src/lib.rs+5−6 examples/todomvc/Cargo.toml+11−12 examples/todomvc/src/router.rs+23−21 examples/todomvc/src/todo.rs+77−21 examples/todomvc/src/todos.rs+5−6 js/change-list-interpreter.js+26 js/strace.js+9 src/builder.rs+4 src/cached.rs+75−13 src/cached_set.rs+58−26 src/change_list/emitter.rs+17 src/change_list/mod.rs+46−3 src/change_list/traversal.rs+1−1 src/diff.rs+207−15 src/events.rs+2−2 src/lib.rs+3−3 src/render.rs+43−16 src/render_context.rs+43−2 src/vdom.rs+89−79 tests/web/cached.js+11 tests/web/cached.rs+103−48 tests/web/events.rs+56−73 tests/web/js_api.rs+30−37 tests/web/keyed.rs+18−19 tests/web/main.rs+23−19 tests/web/render.rs+89−2
.travis.yml+18−12
@@ -25,24 +25,30 @@ matrix:
2525 - name: "build (beta)"
2626 rust: beta
2727 script: INSTALL=1 ./build.sh
28− - name: "build (nightly)"
29− rust: nightly
30− script: INSTALL=1 ./build.sh
3128 - name: "headless browser tests (firefox)"
3229 rust: stable
3330 addons:
3431 firefox: latest
3532 script: wasm-pack test --firefox --headless -- --features xxx-unstable-internal-use-only
36− - name: "headless browser tests (chrome)"
37− rust: stable
38− addons:
39− chrome: stable
40− script: wasm-pack test --chrome --headless -- --features xxx-unstable-internal-use-only
4133 - name: "native tests"
4234 rust: stable
4335 install: echo "no install"
4436 script: cargo test --all
45− - name: "check native benches"
46− rust: nightly
47− install: echo "no install"
48− script: cargo check --benches --features xxx-unstable-internal-use-only
37+
38+ # TODO: A bug in `rustc` is making `js-sys` broken on nightly:
39+ # https://github.com/rust-lang/rust/issues/69315
40+ # - name: "build (nightly)"
41+ # rust: nightly
42+ # script: INSTALL=1 ./build.sh
43+ # - name: "check native benches"
44+ # rust: nightly
45+ # install: echo "no install"
46+ # script: cargo check --benches --features xxx-unstable-internal-use-only
47+
48+ # TODO: `chromedriver` is complaining about ports or something. Temporarily
49+ # disable in CI until we figure it out.
50+ # - name: "headless browser tests (chrome)"
51+ # rust: stable
52+ # addons:
53+ # chrome: stable
54+ # script: wasm-pack test --chrome --headless -- --features xxx-unstable-internal-use-only
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1039−"checksum wincolor 1.0.1 (registry+https://github.com/rust-lang/crates.io-index)" = "561ed901ae465d6185fa7864d63fbd5720d0ef718366c9a4dc83cf6170d7e9ba"
Cargo.toml+16−16
@@ -8,7 +8,7 @@ license = "MPL-2.0"
88name = "dodrio"
99readme = "./README.md"
1010repository = "https://github.com/fitzgen/dodrio"
11−version = "0.1.0"
11+version = "0.2.0"
1212
1313[badges]
1414travis-ci = { repository = "fitzgen/dodrio" }
@@ -42,19 +42,18 @@ xxx-unstable-strace = []
4242xxx-unstable-internal-use-only = []
4343
4444[dependencies]
45−bumpalo = "2.4.1"
46−cfg-if = "0.1.7"
47−futures = "0.1.26"
48−wasm-bindgen = "0.2.42"
49−wasm-bindgen-futures = "0.3.19"
50−js-sys = "0.3.19"
45+bumpalo = "2.6.0"
46+cfg-if = "0.1.10"
5147fxhash = "0.2.1"
52−log = { version = "0.4.6", optional = true }
53−bitflags = "1.0.4"
48+js-sys = "0.3.32"
49+log = { version = "0.4.11", optional = true }
5450longest-increasing-subsequence = "0.1.0"
51+serde = { version = "1.0.114", optional = true }
52+wasm-bindgen = "0.2.55"
53+wasm-bindgen-futures = "0.4.5"
5554
5655[dependencies.web-sys]
57−version = "0.3.19"
56+version = "0.3.32"
5857features = [
5958 "console",
6059 "Document",
@@ -65,13 +64,14 @@ features = [
6564]
6665
6766[dev-dependencies]
68−console_log = "0.1.2"
69−dodrio-js-api = { version = "=0.1.0", path = "./crates/js-api" }
70−log = "0.4.6"
71−wasm-bindgen-test = "0.2.42"
67+console_log = "0.2.0"
68+dodrio-js-api = { version = "=0.2.0", path = "./crates/js-api" }
69+futures = "0.3.5"
70+log = "0.4.11"
71+wasm-bindgen-test = "0.3.5"
7272
7373[dev-dependencies.web-sys]
74−version = "0.3.19"
74+version = "0.3.32"
7575features = [
7676 "Attr",
7777 "EventTarget",
@@ -81,7 +81,7 @@ features = [
8181]
8282
8383[target.'cfg(not(target_arch = "wasm32"))'.dev-dependencies]
84−criterion = "0.2.11"
84+criterion = "0.3.3"
8585
8686[profile.bench]
8787debug = true
README.md+9
@@ -57,6 +57,15 @@ directory](https://github.com/fitzgen/dodrio/tree/master/examples), including:
5757* [`js-component`](https://github.com/fitzgen/dodrio/tree/master/examples/js-component):
5858 Defines a rendering component in JavaScript with the `dodrio-js-api` crate.
5959
60+## Cargo Features
61+
62+* `log` — enable debugging-oriented log messages with the `log` crate's
63+ facade. You still have to initialize a logger for the messages to go anywhere,
64+ such as [`console_log`](https://github.com/iamcodemaker/console_log).
65+
66+* `serde` — enable `serde::{Serialize, Deserialize}` implementations for
67+ `Cached<R>` where `R` is serializable and deserializable.
68+
6069## Design
6170
6271### Bump Allocation
benches/benches.rs+13−24
@@ -13,19 +13,20 @@ use dodrio::{
1313 CachedSet, Node, Render, RenderContext, Vdom,
1414};
1515use std::cell::RefCell;
16+use std::convert::TryInto;
1617
1718/// The simplest thing we can render: `<div/>`.
1819struct Empty;
19−impl Render for Empty {
20− fn render<'a>(&self, cx: &mut RenderContext<'a>) -> Node<'a> {
20+impl<'a> Render<'a> for Empty {
21+ fn render(&self, cx: &mut RenderContext<'a>) -> Node<'a> {
2122 div(&cx).finish()
2223 }
2324}
2425
2526/// Render a list that is `self.0` items long, has attributes and listeners.
2627struct SimpleList(usize);
27−impl Render for SimpleList {
28− fn render<'a>(&self, cx: &mut RenderContext<'a>) -> Node<'a> {
28+impl<'a> Render<'a> for SimpleList {
29+ fn render(&self, cx: &mut RenderContext<'a>) -> Node<'a> {
2930 let mut children = bumpalo::collections::Vec::with_capacity_in(self.0, cx.bump);
3031 children.extend((0..self.0).map(|_| {
3132 li(&cx)
@@ -46,9 +47,10 @@ fn criterion_benchmark(c: &mut Criterion) {
4647 Benchmark::new("empty", {
4748 let mut bump = Bump::new();
4849 let cached_set = RefCell::new(CachedSet::default());
50+ let mut templates = Default::default();
4951 move |b| {
5052 bump.reset();
51− let mut cx = RenderContext::new(&bump, &cached_set);
53+ let mut cx = RenderContext::new(&bump, &cached_set, &mut templates);
5254 b.iter(|| {
5355 black_box(Empty.render(&mut cx));
5456 })
@@ -63,24 +65,18 @@ fn criterion_benchmark(c: &mut Criterion) {
6365 {
6466 let mut bump = Bump::new();
6567 let cached_set = RefCell::new(CachedSet::default());
68+ let mut templates = Default::default();
6669 move |b, n| {
6770 bump.reset();
68− let mut cx = RenderContext::new(&bump, &cached_set);
71+ let mut cx = RenderContext::new(&bump, &cached_set, &mut templates);
6972 b.iter(|| {
7073 black_box(SimpleList(*n).render(&mut cx));
7174 })
7275 }
7376 },
74− vec![
75− // TODO: Only test one `n` value until
76− // https://github.com/bheisler/criterion.rs/issues/269 is fixed.
77− //
78− // 100,
79− // 1_000,
80− 10_000,
81− ],
77+ vec![100, 1_000, 10_000],
8278 )
83− .throughput(|n| Throughput::Elements(*n as u32)),
79+ .throughput(|n| Throughput::Elements((*n).try_into().unwrap())),
8480 );
8581
8682 c.bench(
@@ -94,14 +90,7 @@ fn criterion_benchmark(c: &mut Criterion) {
9490 black_box(&vdom);
9591 })
9692 },
97− vec![
98− // TODO: Only test one `n` value until
99− // https://github.com/bheisler/criterion.rs/issues/269 is fixed.
100− //
101− // 100,
102− // 1_000,
103− 10_000,
104− ],
93+ vec![100, 1_000, 10_000],
10594 )
10695 .with_function("empty-to-full-list-to-empty", |b, &n| {
10796 b.iter(|| {
@@ -121,7 +110,7 @@ fn criterion_benchmark(c: &mut Criterion) {
121110 black_box(&vdom);
122111 })
123112 })
124− .throughput(|n| Throughput::Elements(*n as u32)),
113+ .throughput(|n| Throughput::Elements((*n).try_into().unwrap())),
125114 );
126115}
127116
crates/js-api/Cargo.toml+6−7
@@ -7,17 +7,16 @@ keywords = ["javascript", "js", "vdom", "virtual-dom"]
77license = "MPL-2.0"
88name = "dodrio-js-api"
99repository = "https://github.com/fitzgen/dodrio"
10−version = "0.1.0"
10+version = "0.2.0"
1111
1212[badges]
1313travis-ci = { repository = "fitzgen/dodrio" }
1414
1515[dependencies]
16−dodrio = { version = "=0.1.0", path = "../.." }
17−wasm-bindgen = "0.2.42"
18−js-sys = "0.3.19"
19−wasm-bindgen-futures = "0.3.19"
20−futures = "0.1.26"
16+dodrio = { version = "=0.2.0", path = "../.." }
17+wasm-bindgen = "0.2.55"
18+js-sys = "0.3.32"
19+wasm-bindgen-futures = "0.4.5"
2120
2221[dev-dependencies]
23−wasm-bindgen-test = "0.2.42"
22+wasm-bindgen-test = "0.3.5"
crates/js-api/src/lib.rs+13−10
@@ -99,8 +99,8 @@ impl GreetingViaJs {
9999
100100/// And finally the `Render` implementation! This adds a `<p>` element and some
101101/// text around whatever the inner JS `Greeting` component renders.
102−impl Render for GreetingViaJs {
103− fn render<'a>(&self, cx: &mut RenderContext<'a>) -> Node<'a> {
102+impl<'a> Render<'a> for GreetingViaJs {
103+ fn render(&self, cx: &mut RenderContext<'a>) -> Node<'a> {
104104 use dodrio::builder::*;
105105 p(&cx)
106106 .children([
@@ -116,7 +116,6 @@ impl Render for GreetingViaJs {
116116#![deny(missing_docs, missing_debug_implementations)]
117117
118118use dodrio::{builder, bumpalo, Node, Render, RenderContext};
119−use futures::prelude::*;
120119use js_sys::{Object, Promise, Reflect};
121120use wasm_bindgen::prelude::*;
122121use wasm_bindgen::JsCast;
@@ -185,12 +184,16 @@ impl VdomWeak {
185184 /// Schedule re-rendering of the virtual DOM. A promise is returned that is
186185 /// resolved after the rendering has happened.
187186 pub fn render(&self) -> Promise {
188− wasm_bindgen_futures::future_to_promise(
189− self.inner.render().map(|_| JsValue::null()).map_err(|e| {
187+ let future = self.inner.render();
188+
189+ wasm_bindgen_futures::future_to_promise(async move {
190+ if let Err(e) = future.await {
190191 let msg = e.to_string();
191− js_sys::Error::new(&msg).into()
192− }),
193− )
192+ Err(js_sys::Error::new(&msg).into())
193+ } else {
194+ Ok(JsValue::null())
195+ }
196+ })
194197 }
195198}
196199
@@ -213,8 +216,8 @@ impl JsRender {
213216 }
214217}
215218
216−impl Render for JsRender {
217− fn render<'a>(&self, cx: &mut RenderContext<'a>) -> Node<'a> {
219+impl<'a> Render<'a> for JsRender {
220+ fn render(&self, cx: &mut RenderContext<'a>) -> Node<'a> {
218221 create(cx, self.render())
219222 }
220223}
examples/counter/Cargo.toml+5−5
@@ -11,13 +11,13 @@ crate-type = ["cdylib"]
1111
1212[dependencies]
1313console_error_panic_hook = "0.1.6"
14−console_log = "0.1.2"
14+console_log = "0.2.0"
1515dodrio = { path = "../.." }
16−log = "0.4.6"
17−wasm-bindgen = "0.2.42"
16+log = "0.4.11"
17+wasm-bindgen = "0.2.55"
1818
1919[dependencies.web-sys]
20−version = "0.3.19"
20+version = "0.3.32"
2121features = [
2222 "console",
2323 "Document",
@@ -30,4 +30,4 @@ features = [
3030]
3131
3232[dev-dependencies]
33−wasm-bindgen-test = "0.2.42"
33+wasm-bindgen-test = "0.3.5"
examples/counter/src/lib.rs+3−3
@@ -1,4 +1,4 @@
1−use dodrio::{bumpalo, Render, RenderContext};
1+use dodrio::{bumpalo, Node, Render, RenderContext};
22use log::*;
33use wasm_bindgen::prelude::*;
44
@@ -26,8 +26,8 @@ impl Counter {
2626
2727// The `Render` implementation for `Counter`s displays the current count and has
2828// buttons to increment and decrement the count.
29−impl Render for Counter {
30− fn render<'a>(&self, cx: &mut RenderContext<'a>) -> dodrio::Node<'a> {
29+impl<'a> Render<'a> for Counter {
30+ fn render(&self, cx: &mut RenderContext<'a>) -> Node<'a> {
3131 use dodrio::builder::*;
3232
3333 // Stringify the count as a bump-allocated string.
examples/game-of-life/Cargo.toml+5−6
@@ -11,14 +11,13 @@ crate-type = ["cdylib"]
1111
1212[dependencies]
1313dodrio = { path = "../.." }
14−wasm-bindgen = "0.2.42"
14+wasm-bindgen = "0.2.55"
1515console_error_panic_hook = "0.1.6"
16−js-sys = "0.3.19"
17−wasm-bindgen-futures = "0.3.19"
18−futures = "0.1.26"
16+js-sys = "0.3.32"
17+wasm-bindgen-futures = "0.4.5"
1918
2019[dependencies.web-sys]
21−version = "0.3.19"
20+version = "0.3.32"
2221features = [
2322 "Document",
2423 "HtmlElement",
@@ -27,4 +26,4 @@ features = [
2726]
2827
2928[dev-dependencies]
30−wasm-bindgen-test = "0.2.42"
29+wasm-bindgen-test = "0.3.5"
examples/game-of-life/src/lib.rs+18−13
@@ -1,5 +1,4 @@
11use dodrio::{bumpalo, Node, Render, RenderContext, Vdom};
2−use futures::prelude::*;
32use std::cell::RefCell;
43use std::rc::Rc;
54use wasm_bindgen::{prelude::*, JsCast};
@@ -127,8 +126,8 @@ impl Universe {
127126}
128127
129128/// The rendering implementation for our Game of Life.
130−impl Render for Universe {
131− fn render<'a>(&self, cx: &mut RenderContext<'a>) -> Node<'a> {
129+impl<'a> Render<'a> for Universe {
130+ fn render(&self, cx: &mut RenderContext<'a>) -> Node<'a> {
132131 use dodrio::builder::*;
133132
134133 let mut rows = bumpalo::collections::Vec::with_capacity_in(self.height as usize, cx.bump);
@@ -172,26 +171,32 @@ pub fn run() {
172171 // Create a new Game of Life `Universe` render component.
173172 let universe = Universe::new();
174173
175− // Create a virtual DOM and mount it and the `Hello` render component to the
174+ // Create a virtual DOM and mount it and the `Universe` render component to the
176175 // `<body>`.
177176 let vdom = Vdom::new(body.as_ref(), universe);
178177
179178 // Kick off a loop that keeps computing a tick of the universe and then
180179 // re-rendering on every animation frame.
181− let rc: Rc<RefCell<Option<Closure<FnMut()>>>> = Rc::new(RefCell::new(None));
180+ let rc = <Rc<RefCell<Option<Closure<dyn FnMut()>>>>>::default();
182181 let rc2 = rc.clone();
183182 let window2 = window.clone();
184183 let weak = vdom.weak();
185184 let f = Closure::wrap(Box::new(move || {
186185 weak.schedule_render();
187186
188− wasm_bindgen_futures::spawn_local(
189− weak.with_component(|root| {
190− let universe = root.unwrap_mut::<Universe>();
191− universe.tick();
192− })
193− .map_err(|_| wasm_bindgen::throw_str("impossible, we always keep the vdom alive")),
194− );
187+ wasm_bindgen_futures::spawn_local({
188+ let weak = weak.clone();
189+ async move {
190+ let fut = weak.with_component(|root| {
191+ let universe = root.unwrap_mut::<Universe>();
192+ universe.tick();
193+ });
194+
195+ if fut.await.is_err() {
196+ wasm_bindgen::throw_str("impossible, we always keep the vdom alive");
197+ }
198+ }
199+ });
195200
196201 window
197202 .request_animation_frame(
@@ -202,7 +207,7 @@ pub fn run() {
202207 .unchecked_ref::<js_sys::Function>(),
203208 )
204209 .unwrap_throw();
205− }) as Box<FnMut()>);
210+ }) as Box<dyn FnMut()>);
206211 window2
207212 .request_animation_frame(f.as_ref().unchecked_ref::<js_sys::Function>())
208213 .unwrap_throw();
examples/hello-world/Cargo.toml+3−3
@@ -11,11 +11,11 @@ crate-type = ["cdylib"]
1111
1212[dependencies]
1313dodrio = { path = "../.." }
14−wasm-bindgen = "0.2.42"
14+wasm-bindgen = "0.2.55"
1515console_error_panic_hook = "0.1.6"
1616
1717[dependencies.web-sys]
18−version = "0.3.19"
18+version = "0.3.32"
1919features = [
2020 "Document",
2121 "HtmlElement",
@@ -24,4 +24,4 @@ features = [
2424]
2525
2626[dev-dependencies]
27−wasm-bindgen-test = "0.2.42"
27+wasm-bindgen-test = "0.3.5"
examples/hello-world/src/lib.rs+2−2
@@ -10,8 +10,8 @@ struct Hello {
1010
1111// The `Render` implementation describes how to render a `Hello` component into
1212// HTML.
13−impl Render for Hello {
14− fn render<'a>(&self, cx: &mut RenderContext<'a>) -> Node<'a> {
13+impl<'a> Render<'a> for Hello {
14+ fn render(&self, cx: &mut RenderContext<'a>) -> Node<'a> {
1515 let msg = bumpalo::format!(in cx.bump, "Hello, {}!", self.who);
1616 let msg = msg.into_bump_str();
1717 p(&cx).children([text(msg)]).finish()
examples/input-form/Cargo.toml+3−3
@@ -11,11 +11,11 @@ crate-type = ["cdylib"]
1111
1212[dependencies]
1313dodrio = { path = "../.." }
14−wasm-bindgen = "0.2.42"
14+wasm-bindgen = "0.2.55"
1515console_error_panic_hook = "0.1.6"
1616
1717[dependencies.web-sys]
18−version = "0.3.19"
18+version = "0.3.32"
1919features = [
2020 "console",
2121 "Document",
@@ -29,4 +29,4 @@ features = [
2929]
3030
3131[dev-dependencies]
32−wasm-bindgen-test = "0.2.42"
32+wasm-bindgen-test = "0.3.5"
examples/input-form/src/lib.rs+2−2
@@ -23,8 +23,8 @@ impl SayHelloTo {
2323
2424// The `Render` implementation has a text `<input>` and a `<div>` that shows a
2525// greeting to the `<input>`'s value.
26−impl Render for SayHelloTo {
27− fn render<'a>(&self, cx: &mut RenderContext<'a>) -> Node<'a> {
26+impl<'a> Render<'a> for SayHelloTo {
27+ fn render(&self, cx: &mut RenderContext<'a>) -> Node<'a> {
2828 use dodrio::builder::*;
2929
3030 div(&cx)
examples/js-component/Cargo.toml+3−3
@@ -12,12 +12,12 @@ crate-type = ["cdylib"]
1212[dependencies]
1313dodrio = { path = "../.." }
1414dodrio-js-api = { path = "../../crates/js-api" }
15−wasm-bindgen = "0.2.42"
15+wasm-bindgen = "0.2.55"
1616console_error_panic_hook = "0.1.6"
17−js-sys = "0.3.19"
17+js-sys = "0.3.32"
1818
1919[dependencies.web-sys]
20−version = "0.3.19"
20+version = "0.3.32"
2121features = [
2222 "Document",
2323 "HtmlElement",
examples/js-component/src/lib.rs+3−3
@@ -31,8 +31,8 @@ impl GreetingViaJs {
3131
3232/// Here's the `Render` implementation! This adds a `<p>` element and some text
3333/// around whatever the inner JS `Greeting` component renders.
34−impl Render for GreetingViaJs {
35− fn render<'a>(&self, cx: &mut RenderContext<'a>) -> Node<'a> {
34+impl<'a> Render<'a> for GreetingViaJs {
35+ fn render(&self, cx: &mut RenderContext<'a>) -> Node<'a> {
3636 use dodrio::builder::*;
3737 p(&cx)
3838 .children([text("JavaScript says: "), self.js.render(cx)])
@@ -54,7 +54,7 @@ pub fn run() {
5454 // Create a new `GreetingViaJs` render component.
5555 let component = GreetingViaJs::new("World");
5656
57− // Create a virtual DOM and mount it and the `Hello` render component to the
57+ // Create a virtual DOM and mount it and the `GreetingViaJs` render component to the
5858 // `<body>`.
5959 let vdom = Vdom::new(body.as_ref(), component);
6060
examples/moire/Cargo.toml+8−9
@@ -8,20 +8,19 @@ edition = "2018"
88crate-type = ["cdylib"]
99
1010[dependencies]
11−cfg-if = "0.1.7"
11+cfg-if = "0.1.10"
1212dodrio = { path = "../.." }
13−futures = "0.1.26"
14−log = "0.4.6"
15−wasm-bindgen = "0.2.42"
16−wasm-bindgen-futures = "0.3.19"
13+log = "0.4.11"
14+wasm-bindgen = "0.2.55"
15+wasm-bindgen-futures = "0.4.5"
1716
1817# Optional dependencies for logging.
1918console_error_panic_hook = { optional = true, version = "0.1.6" }
20−console_log = { optional = true, version = "0.1.2" }
21−js-sys = "0.3.19"
19+console_log = { optional = true, version = "0.2.0" }
20+js-sys = "0.3.32"
2221
2322[dependencies.web-sys]
24−version = "0.3.19"
23+version = "0.3.32"
2524features = [
2625 "Document",
2726 "Element",
@@ -35,7 +34,7 @@ features = [
3534]
3635
3736[dev-dependencies]
38−wasm-bindgen-test = "0.2.42"
37+wasm-bindgen-test = "0.3.5"
3938
4039[features]
4140logging = [
examples/moire/src/lib.rs+6−7
@@ -5,8 +5,7 @@ use dodrio::{bumpalo, Node, Render, RenderContext, Vdom};
55use std::cell::RefCell;
66use std::rc::Rc;
77use std::str;
8−use wasm_bindgen::prelude::*;
9−use wasm_bindgen::JsCast;
8+use wasm_bindgen::{prelude::*, JsCast};
109
1110/// This is the main function that is automatically invoked when the wasm module
1211/// is loaded.
@@ -23,12 +22,12 @@ pub fn run() {
2322 // Create a new `Moire` render component.
2423 let component = Moire::new();
2524
26− // Create a virtual DOM and mount it and the `Hello` render component to the
25+ // Create a virtual DOM and mount it and the `Moire` render component to the
2726 // scene.
2827 let vdom = Vdom::new(&scene, component);
2928
3029 // Kick off a loop that keeps re-rendering on every animation frame.
31− let rc: Rc<RefCell<Option<Closure<FnMut()>>>> = Rc::new(RefCell::new(None));
30+ let rc = <Rc<RefCell<Option<Closure<dyn FnMut()>>>>>::default();
3231 let rc2 = rc.clone();
3332 let window2 = window.clone();
3433 let weak = vdom.weak();
@@ -43,7 +42,7 @@ pub fn run() {
4342 .unchecked_ref::<js_sys::Function>(),
4443 )
4544 .unwrap_throw();
46− }) as Box<FnMut()>);
45+ }) as Box<dyn FnMut()>);
4746 window2
4847 .request_animation_frame(f.as_ref().unchecked_ref::<js_sys::Function>())
4948 .unwrap_throw();
@@ -105,8 +104,8 @@ impl Moire {
105104 }
106105}
107106
108−impl Render for Moire {
109− fn render<'a>(&self, cx: &mut RenderContext<'a>) -> Node<'a> {
107+impl<'a> Render<'a> for Moire {
108+ fn render(&self, cx: &mut RenderContext<'a>) -> Node<'a> {
110109 use dodrio::builder::*;
111110
112111 let elapsed = web_sys::window()
examples/sierpinski-triangle/Cargo.toml+5−6
@@ -9,14 +9,13 @@ crate-type = ["cdylib"]
99
1010[dependencies]
1111dodrio = { path = "../.." }
12−wasm-bindgen = "0.2.42"
12+wasm-bindgen = "0.2.55"
1313console_error_panic_hook = "0.1.6"
14−js-sys = "0.3.19"
15−wasm-bindgen-futures = "0.3.19"
16−futures = "0.1.26"
14+js-sys = "0.3.32"
15+wasm-bindgen-futures = "0.4.5"
1716
1817[dependencies.web-sys]
19−version = "0.3.19"
18+version = "0.3.32"
2019features = [
2120 "Document",
2221 "HtmlElement",
@@ -26,4 +25,4 @@ features = [
2625]
2726
2827[dev-dependencies]
29−wasm-bindgen-test = "0.2.42"
28+wasm-bindgen-test = "0.3.5"
examples/sierpinski-triangle/src/lib.rs+5−6
@@ -1,8 +1,7 @@
11use dodrio::{bumpalo, Node, Render, RenderContext, Vdom};
22use std::cell::RefCell;
33use std::rc::Rc;
4−use wasm_bindgen::prelude::*;
5−use wasm_bindgen::JsCast;
4+use wasm_bindgen::{prelude::*, JsCast};
65use web_sys::Window;
76
87// Triangle container defining target size.
@@ -86,8 +85,8 @@ impl Container {
8685 }
8786}
8887
89−impl Render for Container {
90− fn render<'a>(&self, cx: &mut RenderContext<'a>) -> Node<'a> {
88+impl<'a> Render<'a> for Container {
89+ fn render(&self, cx: &mut RenderContext<'a>) -> Node<'a> {
9190 use dodrio::builder::div;
9291
9392 let elapsed = web_sys::window()
@@ -112,7 +111,7 @@ impl Render for Container {
112111
113112// Kick off a loop that keeps re-rendering on every animation frame.
114113fn animate(window: Window, vdom: Vdom) {
115− let rc: Rc<RefCell<Option<Closure<FnMut()>>>> = Rc::new(RefCell::new(None));
114+ let rc = <Rc<RefCell<Option<Closure<dyn FnMut()>>>>>::default();
116115 let rc2 = rc.clone();
117116 let window2 = window.clone();
118117 let weak = vdom.weak();
@@ -127,7 +126,7 @@ fn animate(window: Window, vdom: Vdom) {
127126 .unchecked_ref::<js_sys::Function>(),
128127 )
129128 .unwrap_throw();
130− }) as Box<FnMut()>);
129+ }) as Box<dyn FnMut()>);
131130 window2
132131 .request_animation_frame(f.as_ref().unchecked_ref::<js_sys::Function>())
133132 .unwrap_throw();
examples/todomvc/Cargo.toml+11−12
@@ -5,22 +5,21 @@ name = "dodrio-todomvc"
55version = "0.1.0"
66
77[dependencies]
8−cfg-if = "0.1.7"
9−dodrio = { path = "../.." }
10−futures = "0.1.26"
11−js-sys = "0.3.19"
12−serde = { features = ["derive"], version = "1.0.90" }
13−serde_json = "1.0.39"
14−wasm-bindgen = "0.2.42"
15−wasm-bindgen-futures = "0.3.19"
8+cfg-if = "0.1.10"
9+dodrio = { path = "../..", features = ["serde"] }
10+js-sys = "0.3.32"
11+serde = { features = ["derive"], version = "1.0.114" }
12+serde_json = "1.0.57"
13+wasm-bindgen = "0.2.55"
14+wasm-bindgen-futures = "0.4.5"
1615
1716# Optional dependencies for logging.
1817console_error_panic_hook = { optional = true, version = "0.1.6" }
19−console_log = { optional = true, version = "0.1.2" }
20−log = { optional = true, version = "0.4.6" }
18+console_log = { optional = true, version = "0.2.0" }
19+log = { optional = true, version = "0.4.11" }
2120
2221[dependencies.web-sys]
23−version = "0.3.19"
22+version = "0.3.32"
2423features = [
2524 "Document",
2625 "Event",
@@ -35,7 +34,7 @@ features = [
3534]
3635
3736[dev-dependencies]
38−wasm-bindgen-test = "0.2.42"
37+wasm-bindgen-test = "0.3.5"
3938
4039[features]
4140logging = [
examples/todomvc/src/router.rsmode 100644 → 100755+23−21
@@ -4,10 +4,8 @@ use crate::todos::Todos;
44use crate::utils;
55use crate::visibility::Visibility;
66use dodrio::VdomWeak;
7−use futures::prelude::*;
87use std::str::FromStr;
9−use wasm_bindgen::prelude::*;
10−use wasm_bindgen::JsCast;
8+use wasm_bindgen::{prelude::*, JsCast};
119
1210/// Start the router.
1311pub fn start(vdom: VdomWeak) {
@@ -30,23 +28,27 @@ pub fn start(vdom: VdomWeak) {
3028 v
3129 });
3230
33− wasm_bindgen_futures::spawn_local(
34− vdom.with_component({
35− let vdom = vdom.clone();
36− move |root| {
37− let todos = root.unwrap_mut::<Todos>();
38− // If the todos' visibility already matches the event's
39− // visibility, then there is nothing to do (ha). If they
40− // don't match, then we need to update the todos' visibility
41− // and re-render.
42− if todos.visibility() != new_vis {
43− todos.set_visibility(new_vis);
44− vdom.schedule_render();
45− }
46− }
47− })
48− .map_err(|_| ()),
49− );
31+ wasm_bindgen_futures::spawn_local({
32+ let vdom = vdom.clone();
33+ async move {
34+ let _ = vdom
35+ .with_component({
36+ let vdom = vdom.clone();
37+ move |root| {
38+ let todos = root.unwrap_mut::<Todos>();
39+ // If the todos' visibility already matches the event's
40+ // visibility, then there is nothing to do (ha). If they
41+ // don't match, then we need to update the todos' visibility
42+ // and re-render.
43+ if todos.visibility() != new_vis {
44+ todos.set_visibility(new_vis);
45+ vdom.schedule_render();
46+ }
47+ }
48+ })
49+ .await;
50+ }
51+ });
5052 };
5153
5254 // Call it once to handle the initial `#` fragment.
@@ -57,7 +59,7 @@ pub fn start(vdom: VdomWeak) {
5759 // Note that if we ever intended to unmount our todos app, we would want to
5860 // provide a method for removing this router's event listener and cleaning
5961 // up after ourselves.
60− let on_hash_change = Closure::wrap(Box::new(on_hash_change) as Box<FnMut()>);
62+ let on_hash_change = Closure::wrap(Box::new(on_hash_change) as Box<dyn FnMut()>);
6163 let window = utils::window();
6264 window
6365 .add_event_listener_with_callback("hashchange", on_hash_change.as_ref().unchecked_ref())
examples/todomvc/src/todo.rs+77−21
@@ -1,14 +1,19 @@
11//! Type definition and `dodrio::Render` implementation for a single todo item.
22
33use crate::keys;
4−use dodrio::{Node, Render, RenderContext, RootRender, VdomWeak};
4+use dodrio::{Cached, Node, Render, RenderContext, RootRender, VdomWeak};
55use serde::{Deserialize, Serialize};
66use std::marker::PhantomData;
77use wasm_bindgen::{prelude::*, JsCast};
88
99/// A single todo item.
10−#[derive(Serialize, Deserialize)]
10+#[derive(Default)]
1111pub struct Todo<C> {
12+ inner: Cached<TodoInner<C>>,
13+}
14+
15+#[derive(Serialize, Deserialize)]
16+struct TodoInner<C> {
1217 id: usize,
1318 title: String,
1419 completed: bool,
@@ -48,68 +53,87 @@ impl<C> Todo<C> {
4853 let completed = false;
4954 let edits = None;
5055 Todo {
51− id,
52− title,
53− completed,
54− edits,
55− _controller: PhantomData,
56+ inner: Cached::new(TodoInner {
57+ id,
58+ title,
59+ completed,
60+ edits,
61+ _controller: PhantomData,
62+ }),
5663 }
5764 }
5865
5966 /// Set this todo item's id.
6067 pub fn set_id(&mut self, id: usize) {
61− self.id = id;
68+ if id != self.inner.id {
69+ Cached::invalidate(&self.inner);
70+ }
71+ self.inner.id = id;
6272 }
6373
6474 /// Is this `Todo` complete?
6575 pub fn is_complete(&self) -> bool {
66− self.completed
76+ self.inner.completed
6777 }
6878
6979 /// Mark the `Todo` as complete or not.
7080 pub fn set_complete(&mut self, to: bool) {
71− self.completed = to;
81+ if to != self.inner.completed {
82+ Cached::invalidate(&self.inner);
83+ }
84+ self.inner.completed = to;
7285 }
7386
7487 /// Get this todo's title.
7588 pub fn title(&self) -> &str {
76− &self.title
89+ &self.inner.title
7790 }
7891
7992 /// Set this todo item's title.
8093 pub fn set_title<S: Into<String>>(&mut self, title: S) {
81− self.title = title.into();
94+ let title = title.into();
95+ if title != self.inner.title {
96+ Cached::invalidate(&self.inner);
97+ }
98+ self.inner.title = title;
8299 }
83100
84101 /// Set the edits for this todo.
85102 pub fn set_edits<S: Into<String>>(&mut self, edits: Option<S>) {
86− self.edits = edits.map(Into::into);
103+ let edits = edits.map(Into::into);
104+ if edits != self.inner.edits {
105+ Cached::invalidate(&self.inner);
106+ }
107+ self.inner.edits = edits;
87108 }
88109
89110 /// Take this todo's edits, leaving `None` in their place.
90111 pub fn take_edits(&mut self) -> Option<String> {
91− self.edits.take()
112+ if self.inner.edits.is_some() {
113+ Cached::invalidate(&self.inner);
114+ }
115+ self.inner.edits.take()
92116 }
93117}
94118
95−impl<C: TodoActions> Render for Todo<C> {
96− fn render<'a>(&self, cx: &mut RenderContext<'a>) -> Node<'a> {
119+impl<'a, C: TodoActions> Render<'a> for Todo<C> {
120+ fn render(&self, cx: &mut RenderContext<'a>) -> Node<'a> {
97121 use dodrio::{
98122 builder::*,
99123 bumpalo::{self, collections::String},
100124 };
101125
102− let id = self.id;
103− let title = self.edits.as_ref().unwrap_or(&self.title);
126+ let id = self.inner.id;
127+ let title = self.inner.edits.as_ref().unwrap_or(&self.inner.title);
104128 let title = bumpalo::format!(in cx.bump, "{}", title).into_bump_str();
105129
106130 li(&cx)
107131 .attr("class", {
108132 let mut class = String::new_in(cx.bump);
109− if self.completed {
133+ if self.inner.completed {
110134 class.push_str("completed ");
111135 }
112− if self.edits.is_some() {
136+ if self.inner.edits.is_some() {
113137 class.push_str("editing");
114138 }
115139 class.into_bump_str()
@@ -121,7 +145,7 @@ impl<C: TodoActions> Render for Todo<C> {
121145 input(&cx)
122146 .attr("class", "toggle")
123147 .attr("type", "checkbox")
124− .bool_attr("checked", self.completed)
148+ .bool_attr("checked", self.inner.completed)
125149 .on("click", move |root, vdom, _event| {
126150 C::toggle_completed(root, vdom, id);
127151 })
@@ -171,3 +195,35 @@ impl<C: TodoActions> Render for Todo<C> {
171195 .finish()
172196 }
173197}
198+
199+impl<C> Default for TodoInner<C> {
200+ fn default() -> Self {
201+ TodoInner {
202+ id: Default::default(),
203+ title: Default::default(),
204+ completed: Default::default(),
205+ edits: Default::default(),
206+ _controller: PhantomData,
207+ }
208+ }
209+}
210+
211+impl<C> serde::Serialize for Todo<C> {
212+ fn serialize<S>(&self, serializer: S) -> Result<S::Ok, S::Error>
213+ where
214+ S: serde::Serializer,
215+ {
216+ self.inner.serialize(serializer)
217+ }
218+}
219+
220+impl<'de, C> Deserialize<'de> for Todo<C> {
221+ fn deserialize<D>(deserializer: D) -> Result<Self, D::Error>
222+ where
223+ D: serde::Deserializer<'de>,
224+ {
225+ Ok(Todo {
226+ inner: <Cached<TodoInner<C>>>::deserialize(deserializer)?,
227+ })
228+ }
229+}
examples/todomvc/src/todos.rsmode 100644 → 100755+5−6
@@ -9,8 +9,7 @@ use dodrio::{bumpalo, Node, Render, RenderContext, RootRender, VdomWeak};
99use serde::{Deserialize, Serialize};
1010use std::marker::PhantomData;
1111use std::mem;
12−use wasm_bindgen::prelude::*;
13−use wasm_bindgen::JsCast;
12+use wasm_bindgen::{prelude::*, JsCast};
1413
1514/// A collection of todos.
1615#[derive(Default, Serialize, Deserialize)]
@@ -29,7 +28,7 @@ pub struct Todos<C = Controller> {
2928}
3029
3130/// Actions for `Todos` that can be triggered by UI interactions.
32−pub trait TodosActions: TodoActions {
31+pub trait TodosActions: 'static + TodoActions {
3332 /// Toggle the completion state of all todo items.
3433 fn toggle_all(root: &mut dyn RootRender, vdom: VdomWeak);
3534
@@ -50,7 +49,7 @@ pub trait TodosActions: TodoActions {
5049impl<C> Todos<C> {
5150 /// Construct a new todos set.
5251 ///
53− /// If an existing set is available in local storage, then us that,
52+ /// If an existing set is available in local storage, then use that,
5453 /// otherwise create a new set.
5554 pub fn new() -> Self
5655 where
@@ -290,8 +289,8 @@ impl<C: TodosActions> Todos<C> {
290289 }
291290}
292291
293−impl<C: TodosActions> Render for Todos<C> {
294− fn render<'a>(&self, cx: &mut RenderContext<'a>) -> Node<'a> {
292+impl<'a, C: TodosActions> Render<'a> for Todos<C> {
293+ fn render(&self, cx: &mut RenderContext<'a>) -> Node<'a> {
295294 use dodrio::builder::*;
296295
297296 div(&cx)
js/change-list-interpreter.js+26
@@ -259,6 +259,22 @@ const OP_TABLE = [
259259 const className = interpreter.getCachedString(classId);
260260 top(interpreter.stack).className = className;
261261 return i;
262+ },
263+
264+ // 24
265+ function saveTemplate(interpreter, mem8, mem32, i) {
266+ const id = mem32[i++];
267+ const template = top(interpreter.stack);
268+ interpreter.saveTemplate(id, template.cloneNode(true));
269+ return i;
270+ },
271+
272+ // 25
273+ function pushTemplate(interpreter, mem8, mem32, i) {
274+ const id = mem32[i++];
275+ const template = interpreter.getTemplate(id);
276+ interpreter.stack.push(template.cloneNode(true));
277+ return i;
262278 }
263279];
264280
@@ -270,6 +286,7 @@ export class ChangeListInterpreter {
270286 this.stack = [];
271287 this.strings = new Map();
272288 this.temporaries = [];
289+ this.templates = new Map();
273290 }
274291
275292 unmount() {
@@ -283,6 +300,7 @@ export class ChangeListInterpreter {
283300 this.stack = null;
284301 this.strings = null;
285302 this.temporaries = null;
303+ this.templates = null;
286304 }
287305
288306 addChangeListRange(start, len) {
@@ -330,6 +348,14 @@ export class ChangeListInterpreter {
330348 return this.strings.get(id);
331349 }
332350
351+ saveTemplate(id, template) {
352+ this.templates.set(id, template);
353+ }
354+
355+ getTemplate(id) {
356+ return this.templates.get(id);
357+ }
358+
333359 initEventsTrampoline(trampoline) {
334360 this.trampoline = trampoline;
335361 trampoline.mounted = true;
js/strace.js+9
@@ -6,9 +6,13 @@ export function initStrace() {
66}
77
88const counts = new Map;
9+counts.total = 0;
10+
911let timer = null;
1012
1113function log(ctorName, kind, key) {
14+ counts.total += 1;
15+
1216 const entry = `${kind} ${ctorName}#${key}`
1317 const count = counts.get(entry);
1418 if (count === undefined) {
@@ -27,8 +31,13 @@ function dumpAndReset() {
2731 const data = [...counts]
2832 .sort((a, b) => b[1] - a[1])
2933 .map(a => ({ "DOM Method": a[0], "Count": a[1] }));
34+
35+ data.push({ "DOM Method": "<total>", "Count": counts.total });
36+
3037 console.table(data, ["DOM Method", "Count"]);
38+
3139 counts.clear();
40+ counts.total = 0;
3241}
3342
3443function instrument(proto, key, desc) {
src/builder.rs+4
@@ -1010,6 +1010,10 @@ builder_constructors! {
10101010 /// [`<rect>`](https://developer.mozilla.org/en-US/docs/Web/SVG/Element/rect)
10111011 /// element.
10121012 rect <> "http://www.w3.org/2000/svg";
1013+ /// Build a
1014+ /// [`<image>`](https://developer.mozilla.org/en-US/docs/Web/SVG/Element/image)
1015+ /// element.
1016+ image <> "http://www.w3.org/2000/svg";
10131017}
10141018
10151019/// Construct a text node.
src/cached.rs+75−13
@@ -3,18 +3,36 @@ use crate::{
33 node::{CachedNode, NodeKey},
44 Node, Render, RenderContext,
55};
6+use std::any::TypeId;
67use std::cell::Cell;
78use std::ops::{Deref, DerefMut};
89
910/// A renderable that supports caching for when rendering is expensive but can
1011/// generate the same DOM tree.
11−#[derive(Clone, Debug)]
12−pub struct Cached<R> {
12+///
13+/// # Example
14+///
15+/// The [TodoMVC
16+/// example](https://github.com/fitzgen/dodrio/blob/master/examples/todomvc/src/todo.rs)
17+/// caches individual todo items.
18+#[derive(Clone, Debug, Default)]
19+pub struct Cached<R>
20+where
21+ R: Default,
22+{
1323 inner: R,
1424 cached: Cell<Option<CachedNode>>,
1525}
1626
17−impl<R> Cached<R> {
27+pub_unstable_internal! {
28+ #[derive(Clone, Copy, PartialEq, Eq, Debug, Hash)]
29+ pub(crate) struct TemplateId(TypeId);
30+}
31+
32+impl<R> Cached<R>
33+where
34+ R: Default,
35+{
1836 /// Construct a new `Cached<R>` of an inner `R`.
1937 ///
2038 /// # Example
@@ -22,12 +40,13 @@ impl<R> Cached<R> {
2240 /// ```
2341 /// use dodrio::{Cached, Node, Render, RenderContext};
2442 ///
43+ /// #[derive(Default)]
2544 /// pub struct Counter {
2645 /// count: u32,
2746 /// }
2847 ///
29− /// impl Render for Counter {
30− /// fn render<'a>(&self, cx: &mut RenderContext<'a>) -> Node<'a> {
48+ /// impl<'a> Render<'a> for Counter {
49+ /// fn render(&self, cx: &mut RenderContext<'a>) -> Node<'a> {
3150 /// // ...
3251 /// # unimplemented!()
3352 /// }
@@ -61,12 +80,13 @@ impl<R> Cached<R> {
6180 /// use dodrio::{bumpalo, Cached, Node, Render, RenderContext};
6281 ///
6382 /// /// A component that renders to "<p>Hello, {who}!</p>"
83+ /// #[derive(Default)]
6484 /// pub struct Hello {
6585 /// who: String
6686 /// }
6787 ///
68− /// impl Render for Hello {
69− /// fn render<'a>(&self, cx: &mut RenderContext<'a>) -> Node<'a> {
88+ /// impl<'a> Render<'a> for Hello {
89+ /// fn render(&self, cx: &mut RenderContext<'a>) -> Node<'a> {
7090 /// use dodrio::builder::*;
7191 /// let greeting = bumpalo::format!(in cx.bump, "Hello, {}!", self.who);
7292 /// p(&cx)
@@ -94,7 +114,19 @@ impl<R> Cached<R> {
94114 }
95115}
96116
97−impl<R> Deref for Cached<R> {
117+impl<R> Cached<R>
118+where
119+ R: 'static + Default,
120+{
121+ pub(crate) fn template_id() -> TemplateId {
122+ TemplateId(TypeId::of::<R>())
123+ }
124+}
125+
126+impl<R> Deref for Cached<R>
127+where
128+ R: Default,
129+{
98130 type Target = R;
99131
100132 fn deref(&self) -> &R {
@@ -102,17 +134,21 @@ impl<R> Deref for Cached<R> {
102134 }
103135}
104136
105−impl<R> DerefMut for Cached<R> {
137+impl<R> DerefMut for Cached<R>
138+where
139+ R: Default,
140+{
106141 fn deref_mut(&mut self) -> &mut R {
107142 &mut self.inner
108143 }
109144}
110145
111−impl<R> Render for Cached<R>
146+impl<'a, R> Render<'a> for Cached<R>
112147where
113− R: Render,
148+ R: 'static + Default + for<'b> Render<'b>,
114149{
115− fn render<'a>(&self, cx: &mut RenderContext<'a>) -> Node<'a> {
150+ fn render(&self, cx: &mut RenderContext<'a>) -> Node<'a> {
151+ let template = cx.template::<R>();
116152 let cached = match self.cached.get() {
117153 // This does-the-cache-contain-this-id check is necessary because
118154 // the same `Cached<R>` instance can be rendered into vdom A, which
@@ -151,7 +187,7 @@ where
151187 }
152188 _ => {
153189 let mut key = NodeKey::NONE;
154− let id = CachedSet::insert(cx, |nested_cx| {
190+ let id = CachedSet::insert(cx, false, template, |nested_cx| {
155191 let node = self.inner.render(nested_cx);
156192 key = node.key();
157193 node
@@ -165,3 +201,29 @@ where
165201 cached.into()
166202 }
167203}
204+
205+#[cfg(feature = "serde")]
206+impl<R> serde::Serialize for Cached<R>
207+where
208+ R: Default + serde::Serialize,
209+{
210+ fn serialize<S>(&self, serializer: S) -> Result<S::Ok, S::Error>
211+ where
212+ S: serde::Serializer,
213+ {
214+ self.inner.serialize(serializer)
215+ }
216+}
217+
218+#[cfg(feature = "serde")]
219+impl<'de, R> serde::Deserialize<'de> for Cached<R>
220+where
221+ R: Default + serde::Deserialize<'de>,
222+{
223+ fn deserialize<D>(deserializer: D) -> Result<Self, D::Error>
224+ where
225+ D: serde::Deserializer<'de>,
226+ {
227+ R::deserialize(deserializer).map(Cached::new)
228+ }
229+}
src/cached_set.rs+58−26
@@ -35,6 +35,28 @@ pub(crate) struct CacheEntry {
3535 // once, we don't have to repeat the tracing every time we want to garbage
3636 // collect cache entries.
3737 edges: FxHashSet<CacheId>,
38+
39+ // The template for this cached virtual subtree.
40+ //
41+ // When a cache entry has a template, that means that the `ChangeList` will
42+ // lazily build a physical DOM subtree based on the template, and when we
43+ // create new versions of this cached result, we clone the template's
44+ // physical DOM subtree and then modify it, rather than building the cached
45+ // result up from scratch. This is a nice win because we bounce between JS
46+ // and DOM methods less often, and get the C++ DOM implementation to do most
47+ // of the subtree construction for us.
48+ template: Option<CacheId>,
49+
50+ // Whether this entry should never be garbage collected. Typically only
51+ // templates are pinned.
52+ pinned: bool,
53+}
54+
55+impl From<CacheId> for u32 {
56+ #[inline]
57+ fn from(id: CacheId) -> u32 {
58+ id.0
59+ }
3860}
3961
4062impl CachedSet {
@@ -62,7 +84,7 @@ impl CachedSet {
6284 }
6385
6486 self.items.retain(|id, entry| {
65− let keep = marked.contains(id);
87+ let keep = entry.pinned || marked.contains(id);
6688 if !keep {
6789 let node: &Node = unsafe { &*entry.node };
6890 registry.remove_subtree(node);
@@ -108,21 +130,38 @@ impl CachedSet {
108130 CacheId(next.expect_throw("ID_COUNTER overflowed"))
109131 }
110132
111− pub(crate) fn insert<F>(cx: &mut RenderContext, f: F) -> CacheId
133+ pub(crate) fn insert<F>(
134+ cx: &mut RenderContext,
135+ pinned: bool,
136+ template: Option<CacheId>,
137+ f: F,
138+ ) -> CacheId
112139 where
113140 F: for<'a> FnOnce(&mut RenderContext<'a>) -> Node<'a>,
114141 {
115− let bump = Bump::new();
116142 let set = cx.cached_set;
117− let mut nested_cx = RenderContext::new(&bump, set);
118− let node = f(&mut nested_cx);
119− let node = bump.alloc(node);
120− let edges = {
121− let set = set.borrow();
122− set.trace(node)
143+ let bump = Bump::new();
144+ let (node, edges) = {
145+ let mut nested_cx = RenderContext::new(&bump, cx.cached_set, cx.templates);
146+ let node = f(&mut nested_cx);
147+ let node = bump.alloc(node);
148+ let edges = {
149+ let set = set.borrow();
150+ set.trace(node)
151+ };
152+ (
153+ node as *mut Node<'_> as usize as *const Node<'static>,
154+ edges,
155+ )
156+ };
157+
158+ let entry = CacheEntry {
159+ bump,
160+ node,
161+ edges,
162+ template,
163+ pinned,
123164 };
124− let node = node as *mut Node<'_> as usize as *const Node<'static>;
125− let entry = CacheEntry { bump, node, edges };
126165
127166 let mut set = set.borrow_mut();
128167 let id = set.next_id();
@@ -135,20 +174,13 @@ impl CachedSet {
135174 self.items.contains_key(&id)
136175 }
137176
138− /// Get the node for the given cache id.
139− pub fn get(&self, mut id: CacheId) -> &Node {
140− loop {
141− let entry = self
142− .items
143− .get(&id)
144− .expect_throw("CachedSet::get: should have id in set");
145− let node: &Node = unsafe { &*entry.node };
146− if let NodeKind::Cached(ref c) = node.kind {
147− id = c.id;
148− continue;
149− } else {
150− return node;
151− }
152− }
177+ /// Get the cached node and its template (if any) for the given cache id.
178+ pub fn get(&self, id: CacheId) -> (&Node, Option<CacheId>) {
179+ let entry = self
180+ .items
181+ .get(&id)
182+ .expect_throw("CachedSet::get: should have id in set");
183+ let node: &Node = unsafe { &*entry.node };
184+ (node, entry.template)
153185 }
154186}
src/change_list/emitter.rsmode 100644 → 100755+17
@@ -30,6 +30,7 @@ impl InstructionEmitter {
3030
3131 /// Invoke the given function with each of the allocated instruction
3232 /// sequences that this emitter has built up.
33+ #[cfg_attr(feature = "xxx-unstable-internal-use-only", allow(dead_code))]
3334 pub fn each_instruction_sequence<F>(&mut self, f: F)
3435 where
3536 F: FnMut(&[u8]),
@@ -272,4 +273,20 @@ define_change_list_instructions! {
272273 /// node.className = class
273274 /// ```
274275 set_class(class) = 23,
276+
277+ /// Stack: `[... Node] -> [... Node]`
278+ ///
279+ /// ```text
280+ /// template = stack.top()
281+ /// saveTemplate(id, template)
282+ /// ```
283+ save_template(id) = 24,
284+
285+ /// Stack: `[...] -> [... Node]`
286+ ///
287+ /// ```text
288+ /// template = getTemplate(id)
289+ /// stack.push(template.cloneNode(true))
290+ /// ```
291+ push_template(id) = 25,
275292}
src/change_list/mod.rs+46−3
@@ -8,7 +8,8 @@ pub mod js;
88use self::emitter::InstructionEmitter;
99use self::strings::{StringKey, StringsCache};
1010use self::traversal::{MoveTo, Traversal};
11−use crate::Listener;
11+use crate::{cached_set::CacheId, Listener};
12+use fxhash::FxHashSet;
1213
1314#[derive(Debug)]
1415pub(crate) struct ChangeListPersistentState {
@@ -16,11 +17,13 @@ pub(crate) struct ChangeListPersistentState {
1617 emitter: InstructionEmitter,
1718 traversal: Traversal,
1819 interpreter: js::ChangeListInterpreter,
20+ templates: FxHashSet<CacheId>,
1921}
2022
2123pub(crate) struct ChangeListBuilder<'a> {
2224 state: &'a mut ChangeListPersistentState,
2325 next_temporary: u32,
26+ forcing_new_listeners: bool,
2427}
2528
2629impl Drop for ChangeListPersistentState {
@@ -35,11 +38,13 @@ impl ChangeListPersistentState {
3538 let emitter = InstructionEmitter::new();
3639 let traversal = Traversal::new();
3740 let interpreter = js::ChangeListInterpreter::new(container);
41+ let templates = Default::default();
3842 ChangeListPersistentState {
3943 strings,
4044 emitter,
4145 traversal,
4246 interpreter,
47+ templates,
4348 }
4449 }
4550
@@ -51,6 +56,7 @@ impl ChangeListPersistentState {
5156 ChangeListBuilder {
5257 state: self,
5358 next_temporary: 0,
59+ forcing_new_listeners: false,
5460 }
5561 }
5662}
@@ -227,9 +233,9 @@ impl ChangeListBuilder<'_> {
227233 self.state.emitter.replace_with();
228234 }
229235
230− pub fn set_attribute(&mut self, name: &str, value: &str) {
236+ pub fn set_attribute(&mut self, name: &str, value: &str, is_namespaced: bool) {
231237 debug_assert!(self.traversal_is_committed());
232− if name == "class" {
238+ if name == "class" && !is_namespaced {
233239 let class_id = self.ensure_string(value);
234240 debug!("emit: set_class({:?})", value);
235241 self.state.emitter.set_class(class_id.into());
@@ -281,6 +287,17 @@ impl ChangeListBuilder<'_> {
281287 .create_element_ns(tag_name_id.into(), ns_id.into());
282288 }
283289
290+ pub fn push_force_new_listeners(&mut self) -> bool {
291+ let old = self.forcing_new_listeners;
292+ self.forcing_new_listeners = true;
293+ old
294+ }
295+
296+ pub fn pop_force_new_listeners(&mut self, previous: bool) {
297+ debug_assert!(self.forcing_new_listeners);
298+ self.forcing_new_listeners = previous;
299+ }
300+
284301 pub fn new_event_listener(&mut self, listener: &Listener) {
285302 debug_assert!(self.traversal_is_committed());
286303 debug!("emit: new_event_listener({:?})", listener);
@@ -292,6 +309,12 @@ impl ChangeListBuilder<'_> {
292309
293310 pub fn update_event_listener(&mut self, listener: &Listener) {
294311 debug_assert!(self.traversal_is_committed());
312+
313+ if self.forcing_new_listeners {
314+ self.new_event_listener(listener);
315+ return;
316+ }
317+
295318 debug!("emit: update_event_listener({:?})", listener);
296319 let (a, b) = listener.get_callback_parts();
297320 debug_assert!(a != 0);
@@ -307,4 +330,24 @@ impl ChangeListBuilder<'_> {
307330 let event_id = self.ensure_string(event);
308331 self.state.emitter.remove_event_listener(event_id.into());
309332 }
333+
334+ #[inline]
335+ pub fn has_template(&mut self, id: CacheId) -> bool {
336+ self.state.templates.contains(&id)
337+ }
338+
339+ pub fn save_template(&mut self, id: CacheId) {
340+ debug_assert!(self.traversal_is_committed());
341+ debug_assert!(!self.has_template(id));
342+ debug!("emit: save_template({:?})", id);
343+ self.state.templates.insert(id);
344+ self.state.emitter.save_template(id.into());
345+ }
346+
347+ pub fn push_template(&mut self, id: CacheId) {
348+ debug_assert!(self.traversal_is_committed());
349+ debug_assert!(self.has_template(id));
350+ debug!("emit: push_template({:?})", id);
351+ self.state.emitter.push_template(id.into());
352+ }
310353}
src/change_list/traversal.rs+1−1
@@ -167,7 +167,7 @@ mod tests {
167167
168168 #[test]
169169 fn test_traversal() {
170− fn t<F>(f: F) -> Box<FnMut(&mut Traversal)>
170+ fn t<F>(f: F) -> Box<dyn FnMut(&mut Traversal)>
171171 where
172172 F: 'static + FnMut(&mut Traversal),
173173 {
src/diff.rs+207−15
@@ -78,7 +78,7 @@ pub(crate) fn diff(
7878 return;
7979 }
8080 diff_listeners(change_list, registry, old_listeners, new_listeners);
81− diff_attributes(change_list, old_attributes, new_attributes);
81+ diff_attributes(change_list, old_attributes, new_attributes, new_namespace.is_some());
8282 diff_children(
8383 cached_set,
8484 change_list,
@@ -98,9 +98,27 @@ pub(crate) fn diff(
9898 return;
9999 }
100100
101− let new = cached_set.get(new.id);
102− let old = cached_set.get(old.id);
103− diff(cached_set, change_list, registry, old, new, cached_roots);
101+ let (new, new_template) = cached_set.get(new.id);
102+ let (old, old_template) = cached_set.get(old.id);
103+ if new_template == old_template {
104+ // If they are both using the same template, then just diff the
105+ // subtrees.
106+ diff(cached_set, change_list, registry, old, new, cached_roots);
107+ } else {
108+ // Otherwise, they are probably different enough that
109+ // re-constructing the subtree from scratch should be faster.
110+ // This doubly holds true if we have a new template.
111+ change_list.commit_traversal();
112+ create_and_replace(
113+ cached_set,
114+ change_list,
115+ registry,
116+ new_template,
117+ old,
118+ new,
119+ cached_roots,
120+ );
121+ }
104122 }
105123
106124 // New cached node when the old node was not cached. In this scenario,
@@ -109,10 +127,16 @@ pub(crate) fn diff(
109127 (&NodeKind::Cached(ref c), _) => {
110128 change_list.commit_traversal();
111129 cached_roots.insert(c.id);
112− let new = cached_set.get(c.id);
113− create(cached_set, change_list, registry, new, cached_roots);
114− registry.remove_subtree(&old);
115− change_list.replace_with();
130+ let (new, new_template) = cached_set.get(c.id);
131+ create_and_replace(
132+ cached_set,
133+ change_list,
134+ registry,
135+ new_template,
136+ old,
137+ new,
138+ cached_roots,
139+ );
116140 }
117141
118142 // Old cached node and new non-cached node. Again, assume that they are
@@ -180,26 +204,26 @@ fn diff_listeners(
180204// [... node]
181205//
182206// The change list stack is left unchanged.
183−fn diff_attributes(change_list: &mut ChangeListBuilder, old: &[Attribute], new: &[Attribute]) {
207+fn diff_attributes(change_list: &mut ChangeListBuilder, old: &[Attribute], new: &[Attribute], is_namespaced: bool) {
184208 // Do O(n^2) passes to add/update and remove attributes, since
185209 // there are almost always very few attributes.
186210 'outer: for new_attr in new {
187211 if new_attr.is_volatile() {
188212 change_list.commit_traversal();
189− change_list.set_attribute(new_attr.name, new_attr.value);
213+ change_list.set_attribute(new_attr.name, new_attr.value, is_namespaced);
190214 } else {
191215 for old_attr in old {
192216 if old_attr.name == new_attr.name {
193217 if old_attr.value != new_attr.value {
194218 change_list.commit_traversal();
195− change_list.set_attribute(new_attr.name, new_attr.value);
219+ change_list.set_attribute(new_attr.name, new_attr.value, is_namespaced);
196220 }
197221 continue 'outer;
198222 }
199223 }
200224
201225 change_list.commit_traversal();
202− change_list.set_attribute(new_attr.name, new_attr.value);
226+ change_list.set_attribute(new_attr.name, new_attr.value, is_namespaced);
203227 }
204228 }
205229
@@ -239,6 +263,35 @@ fn diff_children(
239263 return;
240264 }
241265
266+ if new.len() == 1 {
267+ match (old.first(), &new[0]) {
268+ (
269+ Some(&Node {
270+ kind: NodeKind::Text(TextNode { text: old_text }),
271+ }),
272+ &Node {
273+ kind: NodeKind::Text(TextNode { text: new_text }),
274+ },
275+ ) if old_text == new_text => {
276+ // Don't take this fast path...
277+ }
278+ (
279+ _,
280+ &Node {
281+ kind: NodeKind::Text(TextNode { text }),
282+ },
283+ ) => {
284+ change_list.commit_traversal();
285+ change_list.set_text(text);
286+ for o in old {
287+ registry.remove_subtree(o);
288+ }
289+ return;
290+ }
291+ (_, _) => {}
292+ }
293+ }
294+
242295 if old.is_empty() {
243296 if !new.is_empty() {
244297 change_list.commit_traversal();
@@ -900,7 +953,7 @@ fn create(
900953 }
901954
902955 for attr in attributes {
903− change_list.set_attribute(&attr.name, &attr.value);
956+ change_list.set_attribute(&attr.name, &attr.value, namespace.is_some());
904957 }
905958
906959 // Fast path: if there is a single text child, it is faster to
@@ -926,8 +979,147 @@ fn create(
926979 }
927980 NodeKind::Cached(ref c) => {
928981 cached_roots.insert(c.id);
929− let node = cached_set.get(c.id);
930− create(cached_set, change_list, registry, node, cached_roots)
982+ let (node, template) = cached_set.get(c.id);
983+ if let Some(template) = template {
984+ create_with_template(
985+ cached_set,
986+ change_list,
987+ registry,
988+ template,
989+ node,
990+ cached_roots,
991+ );
992+ } else {
993+ create(cached_set, change_list, registry, node, cached_roots);
994+ }
995+ }
996+ }
997+}
998+
999+// Get or create the template.
1000+//
1001+// Upon entering this function the change list stack may be in any shape:
1002+//
1003+// [...]
1004+//
1005+// When this function returns, it leaves a freshly cloned copy of the template
1006+// on the top of the change list stack:
1007+//
1008+// [... template]
1009+#[inline]
1010+fn get_or_create_template<'a>(
1011+ cached_set: &'a CachedSet,
1012+ change_list: &mut ChangeListBuilder,
1013+ registry: &mut EventsRegistry,
1014+ cached_roots: &mut FxHashSet<CacheId>,
1015+ template_id: CacheId,
1016+) -> (&'a Node<'a>, bool) {
1017+ let (template, template_template) = cached_set.get(template_id);
1018+ debug_assert!(
1019+ template_template.is_none(),
1020+ "templates should not be templated themselves"
1021+ );
1022+
1023+ // If we haven't already created and saved the physical DOM subtree for this
1024+ // template, do that now.
1025+ if change_list.has_template(template_id) {
1026+ // Clone the template and push it onto the stack.
1027+ //
1028+ // [...]
1029+ change_list.push_template(template_id);
1030+ // [... template]
1031+
1032+ (template, true)
1033+ } else {
1034+ // [...]
1035+ create(cached_set, change_list, registry, template, cached_roots);
1036+ // [... template]
1037+ change_list.save_template(template_id);
1038+ // [... template]
1039+
1040+ (template, false)
1041+ }
1042+}
1043+
1044+fn create_and_replace(
1045+ cached_set: &CachedSet,
1046+ change_list: &mut ChangeListBuilder,
1047+ registry: &mut EventsRegistry,
1048+ new_template: Option<CacheId>,
1049+ old: &Node,
1050+ new: &Node,
1051+ cached_roots: &mut FxHashSet<CacheId>,
1052+) {
1053+ debug_assert!(change_list.traversal_is_committed());
1054+
1055+ if let Some(template_id) = new_template {
1056+ let (template, needs_listeners) =
1057+ get_or_create_template(cached_set, change_list, registry, cached_roots, template_id);
1058+ change_list.replace_with();
1059+
1060+ let mut old_forcing = None;
1061+ if needs_listeners {
1062+ old_forcing = Some(change_list.push_force_new_listeners());
9311063 }
1064+
1065+ diff(
1066+ cached_set,
1067+ change_list,
1068+ registry,
1069+ template,
1070+ new,
1071+ cached_roots,
1072+ );
1073+
1074+ if let Some(old) = old_forcing {
1075+ change_list.pop_force_new_listeners(old);
1076+ }
1077+
1078+ change_list.commit_traversal();
1079+ } else {
1080+ create(cached_set, change_list, registry, new, cached_roots);
1081+ change_list.replace_with();
9321082 }
1083+ registry.remove_subtree(old);
1084+}
1085+
1086+fn create_with_template(
1087+ cached_set: &CachedSet,
1088+ change_list: &mut ChangeListBuilder,
1089+ registry: &mut EventsRegistry,
1090+ template_id: CacheId,
1091+ node: &Node,
1092+ cached_roots: &mut FxHashSet<CacheId>,
1093+) {
1094+ debug_assert!(change_list.traversal_is_committed());
1095+
1096+ // [...]
1097+ let (template, needs_listeners) =
1098+ get_or_create_template(cached_set, change_list, registry, cached_roots, template_id);
1099+ // [... template]
1100+
1101+ // Now diff the node with its template.
1102+ //
1103+ // We must force adding new listeners instead of updating existing ones,
1104+ // since listeners don't get cloned in `cloneNode`.
1105+ let mut old_forcing = None;
1106+ if needs_listeners {
1107+ old_forcing = Some(change_list.push_force_new_listeners());
1108+ }
1109+
1110+ diff(
1111+ cached_set,
1112+ change_list,
1113+ registry,
1114+ template,
1115+ node,
1116+ cached_roots,
1117+ );
1118+
1119+ if let Some(old) = old_forcing {
1120+ change_list.pop_force_new_listeners(old);
1121+ }
1122+
1123+ // Make sure that we come back up to the level we were at originally.
1124+ change_list.commit_traversal();
9331125}
src/events.rs+2−2
@@ -86,7 +86,7 @@ cfg_if::cfg_if! {
8686 callback(component, vdom_weak, event);
8787 }
8888 }
89− }) as Box<Fn(web_sys::Event, u32, u32)>);
89+ }) as Box<dyn Fn(web_sys::Event, u32, u32)>);
9090
9191 (registry, closure)
9292 }
@@ -99,7 +99,7 @@ cfg_if::cfg_if! {
9999
100100 pub(crate) fn remove_subtree(&mut self, node: &Node) {
101101 match node.kind {
102− NodeKind::Cached(_) | NodeKind::Text(_) => return,
102+ NodeKind::Cached(_) | NodeKind::Text(_) => {},
103103 NodeKind::Element(&ElementNode {listeners, children, ..}) => {
104104 for l in listeners {
105105 self.remove(l);
src/lib.rs+3−3
@@ -18,8 +18,8 @@
1818//! }
1919//! }
2020//!
21−//! impl<'who> Render for Hello<'who> {
22−//! fn render<'a>(&self, cx: &mut RenderContext<'a>) -> Node<'a> {
21+//! impl<'a, 'who> Render<'a> for Hello<'who> {
22+//! fn render(&self, cx: &mut RenderContext<'a>) -> Node<'a> {
2323//! use dodrio::builder::*;
2424//!
2525//! let id = bumpalo::format!(in cx.bump, "hello-{}", self.who);
@@ -123,7 +123,7 @@ cfg_if::cfg_if! {
123123 /// An element node in the physical DOM.
124124 pub type Element = web_sys::Element;
125125
126− pub(crate) type EventsTrampoline = wasm_bindgen::closure::Closure<Fn(web_sys::Event, u32, u32)>;
126+ pub(crate) type EventsTrampoline = wasm_bindgen::closure::Closure<dyn Fn(web_sys::Event, u32, u32)>;
127127 }
128128}
129129
src/render.rs+43−16
@@ -21,8 +21,8 @@ use wasm_bindgen::UnwrapThrowExt;
2121///
2222/// pub struct MyComponent;
2323///
24−/// impl Render for MyComponent {
25−/// fn render<'a>(&self, cx: &mut RenderContext<'a>) -> Node<'a> {
24+/// impl<'a> Render<'a> for MyComponent {
25+/// fn render(&self, cx: &mut RenderContext<'a>) -> Node<'a> {
2626/// use dodrio::builder::*;
2727///
2828/// p(&cx)
@@ -35,26 +35,26 @@ use wasm_bindgen::UnwrapThrowExt;
3535/// }
3636/// }
3737/// ```
38−pub trait Render {
38+pub trait Render<'a> {
3939 /// Render `self` as a virtual DOM. Use the given context's `Bump` for
4040 /// temporary allocations.
41− fn render<'a>(&self, cx: &mut RenderContext<'a>) -> Node<'a>;
41+ fn render(&self, cx: &mut RenderContext<'a>) -> Node<'a>;
4242}
4343
44−impl<'r, R> Render for &'r R
44+impl<'a, 'r, R> Render<'a> for &'r R
4545where
46− R: Render,
46+ R: Render<'a>,
4747{
48− fn render<'a>(&self, cx: &mut RenderContext<'a>) -> Node<'a> {
48+ fn render(&self, cx: &mut RenderContext<'a>) -> Node<'a> {
4949 (**self).render(cx)
5050 }
5151}
5252
53−impl<R> Render for Rc<R>
53+impl<'a, R> Render<'a> for Rc<R>
5454where
55− R: Render,
55+ R: Render<'a>,
5656{
57− fn render<'a>(&self, cx: &mut RenderContext<'a>) -> Node<'a> {
57+ fn render(&self, cx: &mut RenderContext<'a>) -> Node<'a> {
5858 (**self).render(cx)
5959 }
6060}
@@ -69,24 +69,24 @@ where
6969/// You do not need to implement this trait by hand: there is a blanket
7070/// implementation for all `Render` types that fulfill the `RootRender`
7171/// requirements.
72−pub trait RootRender: Any + Render {
72+pub trait RootRender: Any + for<'a> Render<'a> {
7373 /// Get this `&RootRender` trait object as an `&Any` trait object reference.
74− fn as_any(&self) -> &Any;
74+ fn as_any(&self) -> &dyn Any;
7575
7676 /// Get this `&mut RootRender` trait object as an `&mut Any` trait object
7777 /// reference.
78− fn as_any_mut(&mut self) -> &mut Any;
78+ fn as_any_mut(&mut self) -> &mut dyn Any;
7979}
8080
8181impl<T> RootRender for T
8282where
83− T: Any + Render,
83+ T: Any + for<'a> Render<'a>,
8484{
85− fn as_any(&self) -> &Any {
85+ fn as_any(&self) -> &dyn Any {
8686 self
8787 }
8888
89− fn as_any_mut(&mut self) -> &mut Any {
89+ fn as_any_mut(&mut self) -> &mut dyn Any {
9090 self
9191 }
9292}
@@ -138,4 +138,31 @@ mod tests {
138138 #[allow(dead_code)]
139139 fn takes_dyn_render(_: &dyn super::RootRender) {}
140140 }
141+
142+ #[test]
143+ fn render_bump_scoped_child() {
144+ use crate::{builder::*, bumpalo::collections::String, Node, Render, RenderContext};
145+
146+ struct Child<'a> {
147+ name: &'a str,
148+ }
149+
150+ impl<'a> Render<'a> for Child<'a> {
151+ fn render(&self, _cx: &mut RenderContext<'a>) -> Node<'a> {
152+ text(self.name)
153+ }
154+ }
155+
156+ struct Parent;
157+
158+ impl<'a> Render<'a> for Parent {
159+ fn render(&self, cx: &mut RenderContext<'a>) -> Node<'a> {
160+ let child_name = String::from_str_in("child", cx.bump).into_bump_str();
161+
162+ div(&cx)
163+ .children([Child { name: child_name }.render(cx)])
164+ .finish()
165+ }
166+ }
167+ }
141168}
src/render_context.rs+43−2
@@ -1,5 +1,10 @@
1−use crate::cached_set::CachedSet;
1+use crate::{
2+ cached::{Cached, TemplateId},
3+ cached_set::{CacheId, CachedSet},
4+ Node, Render,
5+};
26use bumpalo::Bump;
7+use fxhash::FxHashMap;
38use std::fmt;
49
510/// Common context available to all `Render` implementations.
@@ -23,6 +28,8 @@ pub struct RenderContext<'a> {
2328
2429 pub(crate) cached_set: &'a crate::RefCell<CachedSet>,
2530
31+ pub(crate) templates: &'a mut FxHashMap<TemplateId, Option<CacheId>>,
32+
2633 // Prevent exhaustive matching on the rendering context, so we can always
2734 // add more members in a semver-compatible way.
2835 _non_exhaustive: (),
@@ -38,14 +45,48 @@ impl fmt::Debug for RenderContext<'_> {
3845
3946impl<'a> RenderContext<'a> {
4047 pub_unstable_internal! {
41− pub(crate) fn new(bump: &'a Bump, cached_set: &'a crate::RefCell<CachedSet>) -> Self {
48+ pub(crate) fn new(
49+ bump: &'a Bump,
50+ cached_set: &'a crate::RefCell<CachedSet>,
51+ templates: &'a mut FxHashMap<TemplateId, Option<CacheId>>
52+ ) -> Self {
4253 RenderContext {
4354 bump,
4455 cached_set,
56+ templates,
4557 _non_exhaustive: (),
4658 }
4759 }
4860 }
61+
62+ pub(crate) fn cache<F>(&mut self, pinned: bool, template: Option<CacheId>, f: F) -> CacheId
63+ where
64+ F: for<'b> FnOnce(&mut RenderContext<'b>) -> Node<'b>,
65+ {
66+ CachedSet::insert(self, pinned, template, f)
67+ }
68+
69+ /// Get or create the cached template for `Cached<R>`.
70+ pub(crate) fn template<R>(&mut self) -> Option<CacheId>
71+ where
72+ R: 'static + Default + for<'b> Render<'b>,
73+ {
74+ let template_id = Cached::<R>::template_id();
75+ if let Some(cache_id) = self.templates.get(&template_id).cloned() {
76+ return cache_id;
77+ }
78+
79+ // Prevent re-entrancy from infinite looping. Any attempts to get `R`'s
80+ // template while constructing the template will simply fail to use the
81+ // templated fast path.
82+ self.templates.insert(template_id, None);
83+
84+ // Render the default `R` and save that as the template for all
85+ // `Cached<R>`s.
86+ let cache_id = self.cache(true, None, |nested_cx| R::default().render(nested_cx));
87+ self.templates.insert(template_id, Some(cache_id));
88+ Some(cache_id)
89+ }
4990}
5091
5192impl<'a, 'b> From<&'b RenderContext<'a>> for &'a Bump {
src/vdom.rs+89−79
@@ -1,14 +1,16 @@
11use super::change_list::ChangeListPersistentState;
22use super::RootRender;
3−use crate::cached_set::CachedSet;
3+use crate::cached::TemplateId;
4+use crate::cached_set::{CacheId, CachedSet};
45use crate::events::EventsRegistry;
56use crate::node::{Node, NodeKey};
67use crate::RenderContext;
78use bumpalo::Bump;
8−use futures::future::Future;
9+use fxhash::FxHashMap;
910use std::cell::Cell;
1011use std::cell::RefCell;
1112use std::fmt;
13+use std::future::Future;
1214use std::mem;
1315use std::mem::ManuallyDrop;
1416use std::rc::{Rc, Weak};
@@ -53,7 +55,7 @@ pub(crate) struct VdomInnerExclusive {
5355 // Always `Some` except just before we drop. Just an option so that
5456 // `unmount` can take the component out but we can still have a Drop
5557 // implementation.
56− component: Option<Box<RootRender>>,
58+ component: Option<Box<dyn RootRender>>,
5759
5860 dom_buffers: Option<[Bump; 2]>,
5961 change_list: ManuallyDrop<ChangeListPersistentState>,
@@ -61,6 +63,7 @@ pub(crate) struct VdomInnerExclusive {
6163 events_registry: Option<Rc<RefCell<EventsRegistry>>>,
6264 events_trampoline: Option<crate::EventsTrampoline>,
6365 cached_set: crate::RefCell<CachedSet>,
66+ templates: FxHashMap<TemplateId, Option<CacheId>>,
6467
6568 // Actually a reference into `self.dom_buffers[0]` or if `self.component` is
6669 // caching renders, into `self.component`'s bump.
@@ -155,12 +158,15 @@ impl Vdom {
155158 where
156159 R: RootRender,
157160 {
158− Self::with_boxed_root_render(container, Box::new(component) as Box<RootRender>)
161+ Self::with_boxed_root_render(container, Box::new(component) as Box<dyn RootRender>)
159162 }
160163
161164 /// Construct a `Vdom` with the already-boxed-as-a-trait-object root
162165 /// rendering component.
163− pub fn with_boxed_root_render(container: &crate::Element, component: Box<RootRender>) -> Vdom {
166+ pub fn with_boxed_root_render(
167+ container: &crate::Element,
168+ component: Box<dyn RootRender>,
169+ ) -> Vdom {
164170 crate::strace::init_strace();
165171
166172 let dom_buffers = [Bump::new(), Bump::new()];
@@ -186,6 +192,7 @@ impl Vdom {
186192 events_registry: None,
187193 events_trampoline: None,
188194 cached_set: crate::RefCell::new(Default::default()),
195+ templates: Default::default(),
189196 }),
190197 });
191198
@@ -213,7 +220,7 @@ impl Vdom {
213220 R: RootRender,
214221 {
215222 let mut exclusive = self.inner.exclusive.borrow_mut();
216− let component = Box::new(component) as Box<RootRender>;
223+ let component = Box::new(component) as Box<dyn RootRender>;
217224 exclusive.component = Some(component);
218225 exclusive.render();
219226 }
@@ -233,7 +240,7 @@ impl Vdom {
233240 /// Unmount this virtual DOM, unregister its event listeners, and return its
234241 /// root render component.
235242 #[inline]
236− pub fn unmount(self) -> Box<RootRender> {
243+ pub fn unmount(self) -> Box<dyn RootRender> {
237244 Rc::try_unwrap(self.inner.clone())
238245 .map_err(|_| ())
239246 .unwrap_throw()
@@ -265,7 +272,8 @@ impl VdomInnerExclusive {
265272 dom_buffers[1].reset();
266273
267274 // Render the new current contents into the inactive bump arena.
268− let mut cx = RenderContext::new(&dom_buffers[1], &self.cached_set);
275+ let mut cx =
276+ RenderContext::new(&dom_buffers[1], &self.cached_set, &mut self.templates);
269277 let new_contents = self.component.as_ref().unwrap_throw().render(&mut cx);
270278 let new_contents = extend_node_lifetime(new_contents);
271279
@@ -318,7 +326,7 @@ impl VdomInnerExclusive {
318326 }
319327}
320328
321−fn request_animation_frame(f: &Closure<FnMut()>) {
329+fn request_animation_frame(f: &Closure<dyn FnMut()>) {
322330 web_sys::window()
323331 .expect_throw("should have a window")
324332 .request_animation_frame(f.as_ref().unchecked_ref())
@@ -335,7 +343,7 @@ where
335343 let f = Closure::wrap(Box::new(move || {
336344 *g.borrow_mut() = None;
337345 f();
338− }) as Box<FnMut()>);
346+ }) as Box<dyn FnMut()>);
339347 request_animation_frame(&f);
340348
341349 *h.borrow_mut() = Some(f);
@@ -366,25 +374,23 @@ impl VdomWeak {
366374 /// Replace the root rendering component with the new `root`.
367375 ///
368376 /// Returns a future that resolves to the *old* root component.
369− pub fn set_component(
377+ pub async fn set_component(
370378 self,
371379 root: Box<dyn RootRender>,
372− ) -> impl Future<Item = Box<dyn RootRender + 'static>, Error = VdomDroppedError> {
373− futures::future::ok(self.inner.upgrade())
374− .and_then(|inner| inner.ok_or(()))
375− .map_err(|_| VdomDroppedError {})
376− .and_then(|inner| {
377− let promise = js_sys::Promise::resolve(&JsValue::null());
378− JsFuture::from(promise)
379− .map_err(|_| VdomDroppedError {})
380− .and_then(move |_| {
381− let old = {
382− let mut exclusive = inner.exclusive.borrow_mut();
383− mem::replace(&mut *exclusive.component.as_mut().unwrap_throw(), root)
384− };
385− VdomWeak::new(&inner).render().map(|_| old)
386− })
387− })
380+ ) -> Result<Box<dyn RootRender + 'static>, VdomDroppedError> {
381+ let inner = self.inner.upgrade().ok_or(VdomDroppedError {})?;
382+
383+ // Wait for a new tick of the micro-task queue
384+ let _ = JsFuture::from(js_sys::Promise::resolve(&JsValue::null())).await;
385+
386+ let old = {
387+ let mut exclusive = inner.exclusive.borrow_mut();
388+ mem::replace(&mut *exclusive.component.as_mut().unwrap_throw(), root)
389+ };
390+
391+ VdomWeak::new(&inner).render().await?;
392+
393+ Ok(old)
388394 }
389395
390396 /// Execute `f` with a reference to this virtual DOM's root rendering
@@ -392,24 +398,18 @@ impl VdomWeak {
392398 ///
393399 /// To ensure exclusive access to the root rendering component, the
394400 /// invocation takes place on a new tick of the micro-task queue.
395− pub fn with_component<F, T>(&self, f: F) -> impl Future<Item = T, Error = VdomDroppedError>
401+ pub async fn with_component<F, T>(&self, f: F) -> Result<T, VdomDroppedError>
396402 where
397403 F: 'static + FnOnce(&mut dyn RootRender) -> T,
398404 {
399− futures::future::ok(self.inner.upgrade())
400− .and_then(|inner| inner.ok_or(()))
401− .map_err(|_| VdomDroppedError {})
402− .and_then(|inner| {
403− let mut f = Some(f);
404− let promise = js_sys::Promise::resolve(&JsValue::null());
405− JsFuture::from(promise)
406− .map_err(|_| VdomDroppedError {})
407− .map(move |_| {
408− let f = f.take().unwrap_throw();
409− let mut exclusive = inner.exclusive.borrow_mut();
410− f(exclusive.component_raw_mut())
411− })
412− })
405+ let inner = self.inner.upgrade().ok_or(VdomDroppedError {})?;
406+
407+ // Wait for a new tick of the micro-task queue
408+ let _ = JsFuture::from(js_sys::Promise::resolve(&JsValue::null())).await;
409+
410+ let mut exclusive = inner.exclusive.borrow_mut();
411+
412+ Ok(f(exclusive.component_raw_mut()))
413413 }
414414
415415 /// Schedule a render to occur during the next animation frame.
@@ -418,7 +418,12 @@ impl VdomWeak {
418418 /// `render` instead.
419419 pub fn schedule_render(&self) {
420420 debug!("VdomWeak::schedule_render");
421− wasm_bindgen_futures::spawn_local(self.render().map_err(|_| ()));
421+
422+ let future = self.render();
423+
424+ wasm_bindgen_futures::spawn_local(async move {
425+ let _ = future.await;
426+ });
422427 }
423428
424429 /// Schedule a render to occur during the next animation frame and return a
@@ -426,41 +431,46 @@ impl VdomWeak {
426431 ///
427432 /// If you don't want to do more things after the render completes, then use
428433 /// `schedule_render` instead of `render`.
429− pub fn render(&self) -> impl Future<Item = (), Error = VdomDroppedError> {
430− futures::future::ok(self.inner.upgrade())
431− .and_then(|inner| inner.ok_or(()))
432− .map_err(|_| VdomDroppedError {})
433− .and_then(|inner| {
434− let promise = inner.shared.render_scheduled.take().unwrap_or_else(|| {
435− js_sys::Promise::new(&mut |resolve, reject| {
436− let vdom = VdomWeak {
437− inner: Rc::downgrade(&inner),
438− };
439− with_animation_frame(move || match vdom.inner.upgrade() {
440− None => {
441− warn!("VdomWeak::render: vdom unmounted before we could render");
442− let r = reject.call0(&JsValue::null());
443− debug_assert!(r.is_ok());
444− }
445− Some(inner) => {
446− let mut exclusive = inner.exclusive.borrow_mut();
447− exclusive.render();
448−
449− // We did the render, so take the promise away
450− // and let future `render` calls request new
451− // animation frames.
452− let _ = inner.shared.render_scheduled.take();
453−
454− let r = resolve.call0(&JsValue::null());
455− debug_assert!(r.is_ok());
456− }
457− });
458− })
459− });
460− inner.shared.render_scheduled.set(Some(promise.clone()));
461− JsFuture::from(promise)
462− .map(|_| ())
463− .map_err(|_| VdomDroppedError {})
464− })
434+ pub fn render(&self) -> impl Future<Output = Result<(), VdomDroppedError>> {
435+ let inner = self.inner.upgrade();
436+
437+ async move {
438+ let inner = inner.ok_or(VdomDroppedError {})?;
439+
440+ let promise = inner.shared.render_scheduled.take().unwrap_or_else(|| {
441+ js_sys::Promise::new(&mut |resolve, reject| {
442+ let vdom = VdomWeak {
443+ inner: Rc::downgrade(&inner),
444+ };
445+
446+ with_animation_frame(move || match vdom.inner.upgrade() {
447+ None => {
448+ warn!("VdomWeak::render: vdom unmounted before we could render");
449+ let r = reject.call0(&JsValue::null());
450+ debug_assert!(r.is_ok());
451+ }
452+ Some(inner) => {
453+ let mut exclusive = inner.exclusive.borrow_mut();
454+ exclusive.render();
455+
456+ // We did the render, so take the promise away
457+ // and let future `render` calls request new
458+ // animation frames.
459+ let _ = inner.shared.render_scheduled.take();
460+
461+ let r = resolve.call0(&JsValue::null());
462+ debug_assert!(r.is_ok());
463+ }
464+ });
465+ })
466+ });
467+
468+ inner.shared.render_scheduled.set(Some(promise.clone()));
469+
470+ JsFuture::from(promise)
471+ .await
472+ .map(drop)
473+ .map_err(|_| VdomDroppedError {})
474+ }
465475 }
466476}
tests/web/cached.jsnew file+11
@@ -0,0 +1,11 @@
1+let cloneNodeCount = 0;
2+
3+const origCloneNode = Node.prototype.cloneNode;
4+Node.prototype.cloneNode = function (...args) {
5+ cloneNodeCount += 1;
6+ return origCloneNode.apply(this, args);
7+};
8+
9+export function getCloneNodeCount() {
10+ return cloneNodeCount;
11+}
tests/web/cached.rs+103−48
@@ -1,11 +1,11 @@
11use super::{assert_rendered, before_after, create_element, RenderFn};
2−use dodrio::{builder::*, bumpalo, Cached, Node, Render, RenderContext, Vdom};
3−use futures::prelude::*;
2+use dodrio::{builder::*, bumpalo, Cached, Node, Render, RenderContext, RootRender, Vdom};
43use std::cell::Cell;
54use std::rc::Rc;
6−use wasm_bindgen::*;
5+use wasm_bindgen::prelude::*;
76use wasm_bindgen_test::*;
87
8+#[derive(Default)]
99pub struct CountRenders {
1010 render_count: Cell<usize>,
1111}
@@ -18,8 +18,8 @@ impl CountRenders {
1818 }
1919}
2020
21−impl Render for CountRenders {
22− fn render<'a>(&self, cx: &mut RenderContext<'a>) -> Node<'a> {
21+impl<'a> Render<'a> for CountRenders {
22+ fn render(&self, cx: &mut RenderContext<'a>) -> Node<'a> {
2323 let count = self.render_count.get() + 1;
2424 self.render_count.set(count);
2525
@@ -28,8 +28,8 @@ impl Render for CountRenders {
2828 }
2929}
3030
31−#[wasm_bindgen_test(async)]
32−fn uses_cached_render() -> impl Future<Item = (), Error = JsValue> {
31+#[wasm_bindgen_test]
32+async fn uses_cached_render() {
3333 use dodrio::builder::*;
3434
3535 let cached = Cached::new(CountRenders::new());
@@ -49,57 +49,112 @@ fn uses_cached_render() -> impl Future<Item = (), Error = JsValue> {
4949 let vdom6 = vdom0.clone();
5050 let vdom7 = vdom0.clone();
5151
52+ // We render, populate the cache, and get "1".
53+ vdom0.weak().render().await.unwrap();
5254 vdom0
5355 .weak()
54− // We render, populate the cache, and get "1".
55− .render()
56− .and_then(move |_| {
57− vdom0.weak().with_component(move |comp| {
58− let comp = comp.unwrap_mut::<Cached<CountRenders>>();
59− assert_eq!(comp.render_count.get(), 1);
60− assert_rendered(&container1, &RenderFn(|_| text("1")));
61− })
56+ .with_component(move |comp| {
57+ let comp = comp.unwrap_mut::<Cached<CountRenders>>();
58+ assert_eq!(comp.render_count.get(), 1);
59+ assert_rendered(&container1, &RenderFn(|_| text("1")));
6260 })
63− // We re-render, re-use the cached node, and get "1" again.
64− .and_then(move |_| vdom1.weak().render())
65− .and_then(move |_| {
66− vdom2.weak().with_component(move |comp| {
67− let comp = comp.unwrap_mut::<Cached<CountRenders>>();
68− assert_eq!(comp.render_count.get(), 1);
69− assert_rendered(&container2, &RenderFn(|_| text("1")));
70− })
61+ .await
62+ .unwrap();
63+
64+ // We re-render, re-use the cached node, and get "1" again.
65+ vdom1.weak().render().await.unwrap();
66+ vdom2
67+ .weak()
68+ .with_component(move |comp| {
69+ let comp = comp.unwrap_mut::<Cached<CountRenders>>();
70+ assert_eq!(comp.render_count.get(), 1);
71+ assert_rendered(&container2, &RenderFn(|_| text("1")));
7172 })
72− // We invalidate the cache, re-render, re-populate the cache, and should
73− // now have "2".
74− .and_then(move |_| {
75− vdom3.weak().with_component(move |comp| {
76− let comp = comp.unwrap_mut::<Cached<CountRenders>>();
77− Cached::invalidate(comp);
78− })
73+ .await
74+ .unwrap();
75+
76+ // We invalidate the cache, re-render, re-populate the cache, and should now have "2".
77+ vdom3
78+ .weak()
79+ .with_component(move |comp| {
80+ let comp = comp.unwrap_mut::<Cached<CountRenders>>();
81+ Cached::invalidate(comp);
7982 })
80− .and_then(move |_| vdom4.weak().render())
81− .and_then(move |_| {
82− vdom5.weak().with_component(move |comp| {
83− let comp = comp.unwrap_mut::<Cached<CountRenders>>();
84− assert_eq!(comp.render_count.get(), 2);
85− assert_rendered(&container3, &RenderFn(|_| text("2")));
86− })
83+ .await
84+ .unwrap();
85+ vdom4.weak().render().await.unwrap();
86+ vdom5
87+ .weak()
88+ .with_component(move |comp| {
89+ let comp = comp.unwrap_mut::<Cached<CountRenders>>();
90+ assert_eq!(comp.render_count.get(), 2);
91+ assert_rendered(&container3, &RenderFn(|_| text("2")));
8792 })
88− // We re-render, re-use the cached node, and get "2" again.
89− .and_then(move |_| vdom6.weak().render())
90− .and_then(move |_| {
91− vdom7.weak().with_component(move |comp| {
92− let comp = comp.unwrap_mut::<Cached<CountRenders>>();
93− assert_eq!(comp.render_count.get(), 2);
94− assert_rendered(&container4, &RenderFn(|_| text("2")));
95− })
93+ .await
94+ .unwrap();
95+
96+ // We re-render, re-use the cached node, and get "2" again.
97+ vdom6.weak().render().await.unwrap();
98+ vdom7
99+ .weak()
100+ .with_component(move |comp| {
101+ let comp = comp.unwrap_mut::<Cached<CountRenders>>();
102+ assert_eq!(comp.render_count.get(), 2);
103+ assert_rendered(&container4, &RenderFn(|_| text("2")));
96104 })
97− .map_err(|e| JsValue::from(e.to_string()))
105+ .await
106+ .unwrap();
107+}
108+
109+#[wasm_bindgen(module = "/tests/web/cached.js")]
110+extern "C" {
111+ #[wasm_bindgen(js_name = getCloneNodeCount)]
112+ fn get_clone_node_count() -> u32;
113+}
114+
115+#[wasm_bindgen_test]
116+async fn creating_cached_nodes_uses_clone_node() {
117+ use dodrio::builder::*;
118+
119+ let container = create_element("div");
120+
121+ // The initial vdom render should populate the cache and save a template.
122+ let vdom0 = Rc::new(Vdom::new(&container, Cached::new(CountRenders::new())));
123+ let vdom1 = vdom0.clone();
124+ let _vdom2 = vdom0.clone();
125+
126+ let clone_node_count_before = get_clone_node_count();
127+
128+ // Render something entirely different...
129+ vdom0
130+ .weak()
131+ .set_component(Box::new(RenderFn(|_| text("hi"))) as Box<dyn RootRender>)
132+ .await
133+ .unwrap();
134+
135+ // Re-render our cached node. Since we are creating it from scratch,
136+ // and already have a template from the earlier render, we should
137+ // call `cloneNode` here.
138+ vdom1
139+ .weak()
140+ .set_component(Box::new(Cached::new(CountRenders::new())) as Box<dyn RootRender>)
141+ .await
142+ .unwrap();
143+
144+ let clone_node_count_after = get_clone_node_count();
145+ assert_eq!(clone_node_count_after, clone_node_count_before + 1);
98146}
99147
100148struct Id(&'static str);
101−impl Render for Id {
102− fn render<'a>(&self, _cx: &mut RenderContext<'a>) -> Node<'a> {
149+
150+impl Default for Id {
151+ fn default() -> Id {
152+ Id("")
153+ }
154+}
155+
156+impl<'a> Render<'a> for Id {
157+ fn render(&self, _cx: &mut RenderContext<'a>) -> Node<'a> {
103158 text(self.0)
104159 }
105160}
tests/web/events.rs+56−73
@@ -1,6 +1,6 @@
11use super::create_element;
22use dodrio::{Node, Render, RenderContext, Vdom};
3−use futures::Future;
3+use futures::future::{select, Either};
44use std::cell::{Cell, RefCell};
55use std::rc::Rc;
66use wasm_bindgen::prelude::*;
@@ -9,7 +9,7 @@ use wasm_bindgen_test::*;
99
1010struct EventContainer {
1111 event: &'static str,
12− on_event: Box<FnMut()>,
12+ on_event: Box<dyn FnMut()>,
1313}
1414
1515impl EventContainer {
@@ -24,8 +24,8 @@ impl EventContainer {
2424 }
2525}
2626
27−impl Render for EventContainer {
28− fn render<'a>(&self, cx: &mut RenderContext<'a>) -> Node<'a> {
27+impl<'a> Render<'a> for EventContainer {
28+ fn render(&self, cx: &mut RenderContext<'a>) -> Node<'a> {
2929 use dodrio::builder::*;
3030 div(&cx)
3131 .attr("id", "target")
@@ -44,14 +44,14 @@ fn target(container: &web_sys::Element) -> web_sys::HtmlElement {
4444 .unchecked_into()
4545}
4646
47−#[wasm_bindgen_test(async)]
48−fn click() -> impl Future<Item = (), Error = JsValue> {
47+#[wasm_bindgen_test]
48+async fn click() {
4949 let container = create_element("div");
5050
51− let (sender, receiver) = futures::sync::oneshot::channel();
51+ let (sender, receiver) = futures::channel::oneshot::channel();
5252 let mut sender = Some(sender);
5353
54− let vdom = Vdom::new(
54+ let _vdom = Vdom::new(
5555 &container,
5656 EventContainer::new("click", move || {
5757 sender
@@ -64,18 +64,14 @@ fn click() -> impl Future<Item = (), Error = JsValue> {
6464
6565 target(&container).click();
6666
67− receiver
68− .map(|_| {
69− drop(vdom);
70− })
71− .map_err(|e| JsValue::from(e.to_string()))
67+ receiver.await.unwrap();
7268}
7369
74−#[wasm_bindgen_test(async)]
75−fn updated_listener_is_called() -> impl Future<Item = (), Error = JsValue> {
70+#[wasm_bindgen_test]
71+async fn updated_listener_is_called() {
7672 let container = create_element("div");
7773
78− let (first_sender, first_receiver) = futures::sync::oneshot::channel();
74+ let (first_sender, first_receiver) = futures::channel::oneshot::channel();
7975 let mut first_sender = Some(first_sender);
8076
8177 let vdom = Vdom::new(
@@ -89,7 +85,7 @@ fn updated_listener_is_called() -> impl Future<Item = (), Error = JsValue> {
8985 }),
9086 );
9187
92− let (second_sender, second_receiver) = futures::sync::oneshot::channel();
88+ let (second_sender, second_receiver) = futures::channel::oneshot::channel();
9389 let mut second_sender = Some(second_sender);
9490
9591 vdom.weak()
@@ -100,25 +96,22 @@ fn updated_listener_is_called() -> impl Future<Item = (), Error = JsValue> {
10096 .send("second")
10197 .expect_throw("should not have dropped the receiver");
10298 })))
103− .map_err(|e| JsValue::from(e.to_string()))
104− .and_then(move |_| {
105− target(&container).click();
106−
107− first_receiver
108− .select(second_receiver)
109− .map(|(which, _other)| which)
110− .or_else(|(_error, other)| other)
111− .map(|which| {
112− assert_eq!(which, "second");
113− drop(vdom);
114− })
115− .map_err(|e| JsValue::from(e.to_string()))
116− })
99+ .await
100+ .unwrap();
101+
102+ target(&container).click();
103+
104+ match select(first_receiver, second_receiver).await {
105+ Either::Left((Ok(_), _)) => panic!(),
106+ Either::Left((Err(_), second)) => assert_eq!(second.await, Ok("second")),
107+ Either::Right((Ok(msg), _)) => assert_eq!(msg, "second"),
108+ Either::Right((Err(_), _)) => panic!(),
109+ }
117110}
118111
119112struct ListensOnlyOnFirstRender {
120113 count: Cell<usize>,
121− callback: Box<FnMut()>,
114+ callback: Box<dyn FnMut()>,
122115}
123116
124117impl ListensOnlyOnFirstRender {
@@ -133,8 +126,8 @@ impl ListensOnlyOnFirstRender {
133126 }
134127}
135128
136−impl Render for ListensOnlyOnFirstRender {
137− fn render<'a>(&self, cx: &mut RenderContext<'a>) -> Node<'a> {
129+impl<'a> Render<'a> for ListensOnlyOnFirstRender {
130+ fn render(&self, cx: &mut RenderContext<'a>) -> Node<'a> {
138131 use dodrio::builder::*;
139132
140133 let count = self.count.get();
@@ -150,11 +143,11 @@ impl Render for ListensOnlyOnFirstRender {
150143 }
151144}
152145
153−#[wasm_bindgen_test(async)]
154−fn removed_listener_is_not_called() -> impl Future<Item = (), Error = JsValue> {
146+#[wasm_bindgen_test]
147+async fn removed_listener_is_not_called() {
155148 let container = create_element("div");
156149
157− let (outer_sender, outer_receiver) = futures::sync::oneshot::channel();
150+ let (outer_sender, outer_receiver) = futures::channel::oneshot::channel();
158151 let outer_sender = Rc::new(RefCell::new(Some(outer_sender)));
159152 let outer_listener = Closure::wrap(Box::new(move |_| {
160153 outer_sender
@@ -163,13 +156,13 @@ fn removed_listener_is_not_called() -> impl Future<Item = (), Error = JsValue> {
163156 .expect_throw("should only invoke outer_listener once")
164157 .send("outer")
165158 .expect_throw("should not have dropped receiver");
166− }) as Box<FnMut(web_sys::Event)>);
159+ }) as Box<dyn FnMut(web_sys::Event)>);
167160
168161 container
169162 .add_event_listener_with_callback("click", outer_listener.as_ref().unchecked_ref())
170163 .unwrap();
171164
172− let (vdom_sender, vdom_receiver) = futures::sync::oneshot::channel();
165+ let (vdom_sender, vdom_receiver) = futures::channel::oneshot::channel();
173166 let mut vdom_sender = Some(vdom_sender);
174167
175168 // Render a vdom with a listener into container.
@@ -184,33 +177,26 @@ fn removed_listener_is_not_called() -> impl Future<Item = (), Error = JsValue> {
184177 }),
185178 );
186179
187− vdom.weak()
188− // Re-render, so we aren't listening anymore.
189− .render()
190− .map_err(|e| JsValue::from(e.to_string()))
191− .and_then(move |_| {
192− target(&container).click();
193−
194− // We should get our container's event handler fired, and not the unmounted
195− // vdom's event handler.
196− outer_receiver
197− .select(vdom_receiver)
198− .map(|(which, _other)| which)
199− .or_else(|(_error, other)| other)
200− .map(|which| {
201− assert_eq!(which, "outer");
202− drop(outer_listener);
203− drop(vdom)
204− })
205− .map_err(|e| JsValue::from(e.to_string()))
206− })
180+ // Re-render, so we aren't listening anymore.
181+ vdom.weak().render().await.unwrap();
182+
183+ target(&container).click();
184+
185+ // We should get our container's event handler fired, and not the unmounted
186+ // vdom's event handler.
187+ match select(outer_receiver, vdom_receiver).await {
188+ Either::Left((Ok(msg), _)) => assert_eq!(msg, ("outer")),
189+ Either::Left((Err(_), _)) => panic!(),
190+ Either::Right((Ok(_), _)) => panic!(),
191+ Either::Right((Err(_), outer)) => assert_eq!(outer.await, Ok("outer")),
192+ }
207193}
208194
209−#[wasm_bindgen_test(async)]
210−fn event_does_not_fire_after_unmounting() -> impl Future<Item = (), Error = JsValue> {
195+#[wasm_bindgen_test]
196+async fn event_does_not_fire_after_unmounting() {
211197 let container = create_element("div");
212198
213− let (outer_sender, outer_receiver) = futures::sync::oneshot::channel();
199+ let (outer_sender, outer_receiver) = futures::channel::oneshot::channel();
214200 let outer_sender = Rc::new(RefCell::new(Some(outer_sender)));
215201 let outer_listener = Closure::wrap(Box::new(move |_| {
216202 outer_sender
@@ -219,13 +205,13 @@ fn event_does_not_fire_after_unmounting() -> impl Future<Item = (), Error = JsVa
219205 .expect_throw("should only invoke outer_listener once")
220206 .send("outer")
221207 .expect_throw("should not have dropped receiver");
222− }) as Box<FnMut(web_sys::Event)>);
208+ }) as Box<dyn FnMut(web_sys::Event)>);
223209
224210 container
225211 .add_event_listener_with_callback("click", outer_listener.as_ref().unchecked_ref())
226212 .unwrap();
227213
228− let (vdom_sender, vdom_receiver) = futures::sync::oneshot::channel();
214+ let (vdom_sender, vdom_receiver) = futures::channel::oneshot::channel();
229215 let mut vdom_sender = Some(vdom_sender);
230216
231217 // Render a vdom with a listener into container.
@@ -255,13 +241,10 @@ fn event_does_not_fire_after_unmounting() -> impl Future<Item = (), Error = JsVa
255241
256242 // We should get our container's event handler fired, and not the unmounted
257243 // vdom's event handler.
258− outer_receiver
259− .select(vdom_receiver)
260− .map(|(which, _other)| which)
261− .or_else(|(_error, other)| other)
262− .map(|which| {
263− assert_eq!(which, "outer");
264− drop(outer_listener);
265− })
266− .map_err(|e| JsValue::from(e.to_string()))
244+ match select(outer_receiver, vdom_receiver).await {
245+ Either::Left((Ok(msg), _)) => assert_eq!(msg, ("outer")),
246+ Either::Left((Err(_), _)) => panic!(),
247+ Either::Right((Ok(_), _)) => panic!(),
248+ Either::Right((Err(_), outer)) => assert_eq!(outer.await, Ok("outer")),
249+ }
267250}
tests/web/js_api.rs+30−37
@@ -1,8 +1,7 @@
11use super::{assert_rendered, create_element, RenderFn};
22use dodrio::{builder::*, Node, Render, RenderContext, Vdom};
33use dodrio_js_api::JsRender;
4−use futures::prelude::*;
5−use futures::sync::oneshot;
4+use futures::channel::oneshot;
65use js_sys::Object;
76use std::rc::Rc;
87use wasm_bindgen::prelude::*;
@@ -14,7 +13,7 @@ pub struct WrapJs {
1413}
1514
1615impl WrapJs {
17− pub fn new() -> (WrapJs, oneshot::Receiver<()>, Closure<FnMut()>) {
16+ pub fn new() -> (WrapJs, oneshot::Receiver<()>, Closure<dyn FnMut()>) {
1817 let (sender, receiver) = oneshot::channel();
1918
2019 let on_after_render = Closure::wrap(Box::new({
@@ -26,7 +25,7 @@ impl WrapJs {
2625 .send(())
2726 .expect_throw("receiver should not have been dropped");
2827 }
29− }) as Box<FnMut()>);
28+ }) as Box<dyn FnMut()>);
3029
3130 let component = WrapJs {
3231 inner: JsRender::new(JsComponent::new(&on_after_render)),
@@ -36,8 +35,8 @@ impl WrapJs {
3635 }
3736}
3837
39−impl Render for WrapJs {
40− fn render<'a>(&self, cx: &mut RenderContext<'a>) -> Node<'a> {
38+impl<'a> Render<'a> for WrapJs {
39+ fn render(&self, cx: &mut RenderContext<'a>) -> Node<'a> {
4140 div(&cx)
4241 .attr("class", "wrap-js")
4342 .children([self.inner.render(cx)])
@@ -52,7 +51,7 @@ extern "C" {
5251 type JsComponent;
5352
5453 #[wasm_bindgen(constructor)]
55− fn new(on_after_render: &Closure<FnMut()>) -> JsComponent;
54+ fn new(on_after_render: &Closure<dyn FnMut()>) -> JsComponent;
5655}
5756
5857fn eval_js_rendering_component() {
@@ -96,14 +95,14 @@ fn eval_js_rendering_component() {
9695 });
9796}
9897
99−#[wasm_bindgen_test(async)]
100−fn can_use_js_rendering_components() -> impl Future<Item = (), Error = JsValue> {
98+#[wasm_bindgen_test]
99+async fn can_use_js_rendering_components() {
101100 eval_js_rendering_component();
102101
103102 let container = create_element("div");
104− let (component, receiver, closure) = WrapJs::new();
103+ let (component, receiver, _closure) = WrapJs::new();
104+ let _vdom = Rc::new(Vdom::new(&container, component));
105105
106− let vdom = Rc::new(Vdom::new(&container, component));
107106 assert_rendered(
108107 &container,
109108 &RenderFn(|cx| {
@@ -131,30 +130,24 @@ fn can_use_js_rendering_components() -> impl Future<Item = (), Error = JsValue>
131130 .expect_throw("should be an `HTMLElement` object")
132131 .click();
133132
134− receiver
135− .map(move |_| {
136− assert_rendered(
137− &container,
138− &RenderFn(|cx| {
139− div(&cx)
140− .attr("class", "wrap-js")
141− .children([span(&cx)
142− .attr("class", "js-component")
143− .children([
144− text("Here is some plain text"),
145− b(&cx)
146− .children([text("...and here is some bold text")])
147− .finish(),
148− text("1"),
149− ])
150− .finish()])
151− .finish()
152− }),
153− );
154−
155− drop(vdom);
156− drop(container);
157− drop(closure);
158− })
159− .map_err(|e| e.to_string().into())
133+ receiver.await.unwrap();
134+
135+ assert_rendered(
136+ &container,
137+ &RenderFn(|cx| {
138+ div(&cx)
139+ .attr("class", "wrap-js")
140+ .children([span(&cx)
141+ .attr("class", "js-component")
142+ .children([
143+ text("Here is some plain text"),
144+ b(&cx)
145+ .children([text("...and here is some bold text")])
146+ .finish(),
147+ text("1"),
148+ ])
149+ .finish()])
150+ .finish()
151+ }),
152+ );
160153}
tests/web/keyed.rs+18−19
@@ -1,6 +1,5 @@
11use crate::{assert_rendered, create_element};
22use dodrio::{builder::*, bumpalo, Node, Render, RenderContext, Vdom};
3−use futures::Future;
43use log::*;
54use std::rc::Rc;
65use wasm_bindgen::prelude::*;
@@ -8,8 +7,8 @@ use wasm_bindgen_test::*;
87
98struct Keyed(u16);
109
11−impl Render for Keyed {
12− fn render<'a>(&self, cx: &mut RenderContext<'a>) -> Node<'a> {
10+impl<'a> Render<'a> for Keyed {
11+ fn render(&self, cx: &mut RenderContext<'a>) -> Node<'a> {
1312 let key = bumpalo::format!(in cx.bump, "{}", self.0).into_bump_str();
1413 div(&cx)
1514 .attr("class", "keyed")
@@ -32,13 +31,10 @@ where
3231 parent.finish()
3332}
3433
35−fn assert_keyed<Before, After>(
36− before: Before,
37− after: After,
38−) -> impl Future<Item = (), Error = JsValue>
34+async fn assert_keyed<Before, After>(before: Before, after: After) -> Result<(), JsValue>
3935where
40− Before: 'static + Render,
41− After: 'static + Render,
36+ Before: 'static + for<'a> Render<'a>,
37+ After: 'static + for<'a> Render<'a>,
4238{
4339 #[wasm_bindgen(module = "/tests/web/keyed.js")]
4440 extern "C" {
@@ -56,7 +52,7 @@ where
5652
5753 debug!("====== Rendering the *before* DOM into the physical DOM ======");
5854 let vdom1 = Rc::new(Vdom::new(&container, before.clone()));
59− let vdom2 = vdom1.clone();
55+ let _vdom2 = vdom1.clone();
6056 let saved = save_keyed_elements(&container);
6157
6258 debug!("====== Checking the *before* DOM against the physical DOM ======");
@@ -65,13 +61,14 @@ where
6561 debug!("====== Rendering the *after* DOM into the physical DOM ======");
6662 let weak = vdom1.weak();
6763 weak.set_component(Box::new(after.clone()))
68− .map(move |_| {
69− debug!("====== Checking the *after* DOM against the physical DOM ======");
70− assert_rendered(&container, &after);
71− check_keyed_elements(&container, saved);
72− drop(vdom2);
73− })
74− .map_err(|e| JsValue::from(e.to_string()))
64+ .await
65+ .map_err(|e| e.to_string())?;
66+
67+ debug!("====== Checking the *after* DOM against the physical DOM ======");
68+ assert_rendered(&container, &after);
69+ check_keyed_elements(&container, saved);
70+
71+ Ok(())
7572}
7673
7774macro_rules! keyed_tests {
@@ -86,14 +83,16 @@ macro_rules! keyed_tests {
8683 }
8784 )* ) => {
8885 $(
89− #[wasm_bindgen_test(async)]
90− fn $name() -> impl Future<Item = (), Error = wasm_bindgen::JsValue> {
86+ #[wasm_bindgen_test]
87+ async fn $name() {
9188 use crate::RenderFn;
9289 log::debug!("############### {} ###############", stringify!($name));
9390 assert_keyed(
9491 RenderFn(|$before_cx| { $( $before )* }),
9592 RenderFn(|$after_cx| { $( $after )* }),
9693 )
94+ .await
95+ .unwrap()
9796 }
9897 )*
9998 }
tests/web/main.rs+23−19
@@ -6,7 +6,7 @@ use bumpalo::Bump;
66use dodrio::{
77 Attribute, CachedSet, ElementNode, Node, NodeKind, Render, RenderContext, TextNode, Vdom,
88};
9−use futures::prelude::*;
9+use fxhash::FxHashMap;
1010use log::*;
1111use std::cell::RefCell;
1212use std::rc::Rc;
@@ -50,12 +50,13 @@ pub fn init_logging() {
5050
5151/// Assert that the `container` contains the physical DOM tree that matches
5252/// `r`'s rendered virtual DOM.
53−pub fn assert_rendered<R: Render>(container: &web_sys::Element, r: &R) {
53+pub fn assert_rendered<R: for<'a> Render<'a>>(container: &web_sys::Element, r: &R) {
5454 init_logging();
5555
5656 let cached_set = &RefCell::new(CachedSet::default());
5757 let bump = &Bump::new();
58− let cx = &mut RenderContext::new(bump, cached_set);
58+ let templates = &mut FxHashMap::default();
59+ let cx = &mut RenderContext::new(bump, cached_set, templates);
5960 let node = r.render(cx);
6061 let child = container
6162 .first_child()
@@ -111,7 +112,7 @@ pub fn assert_rendered<R: Render>(container: &web_sys::Element, r: &R) {
111112 }
112113 }
113114 NodeKind::Cached(ref c) => {
114− let expected = cached_set.get(c.id);
115+ let (expected, _template) = cached_set.get(c.id);
115116 check_node(cached_set, actual, &expected);
116117 }
117118 }
@@ -154,11 +155,11 @@ pub struct RenderFn<F>(F)
154155where
155156 F: for<'a> Fn(&mut RenderContext<'a>) -> Node<'a>;
156157
157−impl<F> Render for RenderFn<F>
158+impl<'a, F> Render<'a> for RenderFn<F>
158159where
159− F: for<'a> Fn(&mut RenderContext<'a>) -> Node<'a>,
160+ F: for<'b> Fn(&mut RenderContext<'b>) -> Node<'b>,
160161{
161− fn render<'a>(&self, cx: &mut RenderContext<'a>) -> Node<'a> {
162+ fn render(&self, cx: &mut RenderContext<'a>) -> Node<'a> {
162163 (self.0)(cx)
163164 }
164165}
@@ -166,10 +167,10 @@ where
166167/// Assert that if we start by rendering the `before` virtual DOM tree into a
167168/// physical DOM tree, and then diff it with the `after` virtual DOM tree, then
168169/// the physical DOM tree correctly matches `after`.
169−pub fn assert_before_after<R, S>(before: R, after: S) -> impl Future<Item = (), Error = JsValue>
170+pub async fn assert_before_after<R, S>(before: R, after: S) -> Result<(), JsValue>
170171where
171− R: 'static + Render,
172− S: 'static + Render,
172+ R: 'static + for<'a> Render<'a>,
173+ S: 'static + for<'a> Render<'a>,
173174{
174175 let container = create_element("div");
175176
@@ -178,7 +179,7 @@ where
178179
179180 debug!("====== Rendering the *before* DOM into the physical DOM ======");
180181 let vdom1 = Rc::new(Vdom::new(&container, before.clone()));
181− let vdom2 = vdom1.clone();
182+ let _vdom2 = vdom1.clone();
182183
183184 debug!("====== Checking the *before* DOM against the physical DOM ======");
184185 assert_rendered(&container, &before);
@@ -186,12 +187,13 @@ where
186187 debug!("====== Rendering the *after* DOM into the physical DOM ======");
187188 let weak = vdom1.weak();
188189 weak.set_component(Box::new(after.clone()))
189− .map(move |_| {
190− debug!("====== Checking the *after* DOM against the physical DOM ======");
191− assert_rendered(&container, &after);
192− drop(vdom2);
193− })
194− .map_err(|e| JsValue::from(e.to_string()))
190+ .await
191+ .map_err(|e| e.to_string())?;
192+
193+ debug!("====== Checking the *after* DOM against the physical DOM ======");
194+ assert_rendered(&container, &after);
195+
196+ Ok(())
195197}
196198
197199/// A helper macro for declaring a bunch of `assert_before_after` tests.
@@ -208,14 +210,16 @@ macro_rules! before_after {
208210 }
209211 )* ) => {
210212 $(
211− #[wasm_bindgen_test(async)]
212− fn $name() -> impl Future<Item = (), Error = wasm_bindgen::JsValue> {
213+ #[wasm_bindgen_test]
214+ async fn $name() {
213215 use crate::{assert_before_after, RenderFn};
214216 log::debug!("############### {} ###############", stringify!($name));
215217 assert_before_after(
216218 RenderFn(|$before_bump| { $( $before )* }),
217219 RenderFn(|$after_bump| { $( $after )* })
218220 )
221+ .await
222+ .unwrap()
219223 }
220224 )*
221225 }
tests/web/render.rs+89−2
@@ -1,7 +1,7 @@
11use super::{assert_rendered, before_after, create_element, RenderFn};
2−use dodrio::{builder::*, Vdom};
3−use futures::prelude::*;
2+use dodrio::{builder::*, bumpalo::collections::String, Node, Render, RenderContext, Vdom};
43use std::rc::Rc;
4+use wasm_bindgen::{ JsCast};
55use wasm_bindgen_test::*;
66
77#[wasm_bindgen_test]
@@ -35,6 +35,93 @@ fn container_is_emptied_upon_drop() {
3535 assert!(container.first_child().is_none());
3636}
3737
38+/// Renders a child with a lifetime scoped to the RenderContext bump arena.
39+#[wasm_bindgen_test]
40+fn render_bump_scoped_node() {
41+ struct Child<'a> {
42+ name: &'a str,
43+ }
44+
45+ impl<'a> Render<'a> for Child<'a> {
46+ fn render(&self, _cx: &mut RenderContext<'a>) -> Node<'a> {
47+ text(self.name)
48+ }
49+ }
50+
51+ struct Parent;
52+
53+ impl<'a> Render<'a> for Parent {
54+ fn render(&self, cx: &mut RenderContext<'a>) -> Node<'a> {
55+ let child_name = String::from_str_in("child", cx.bump).into_bump_str();
56+
57+ div(&cx)
58+ .children([Child { name: child_name }.render(cx)])
59+ .finish()
60+ }
61+ }
62+
63+ let parent = Rc::new(RenderFn(|cx| {
64+ Parent.render(cx)
65+ }));
66+
67+ let container = create_element("div");
68+ let _vdom = Vdom::new(&container, parent.clone());
69+
70+ assert_rendered(&container, &parent);
71+}
72+
73+/// Originally, dodrio would use the className property for SVGs.
74+///
75+/// This is problematic because when SVG elements are created, the className is flagged as a read
76+/// only property, so setting it causes an exception to be thrown. Here's an example of how this
77+/// happens:
78+///
79+/// let elem = web_sys::window()
80+/// .unwrap()
81+/// .document()
82+/// .unwrap()
83+/// .create_element_ns(Some("http://www.w3.org/2000/svg"), "svg")
84+/// .unwrap();
85+///
86+/// elem.set_class_name("does-not-work");
87+///
88+/// -----------------------------------------------------------------------------------------------
89+///
90+/// wasm-bindgen: imported JS function that was not marked as `catch` threw an error:
91+/// setting getter-only property "className"
92+///
93+/// -----------------------------------------------------------------------------------------------
94+///
95+/// Now, dodrio passes the 'class' attribute of all namespaced elements into set_attribute. This
96+/// satisfies the restrictions on SVG and keeps the optimized path for non-namespaced elements
97+#[wasm_bindgen_test(async)]
98+async fn test_svg_set_class() {
99+ let container = create_element("div");
100+
101+
102+ let valid_svg = Rc::new(RenderFn(|cx| {
103+ ElementBuilder::new(cx.bump, "svg")
104+ .namespace(Some("http://www.w3.org/2000/svg"))
105+ .attr("class", "works")
106+ .finish()
107+ }));
108+
109+ let vdom = Vdom::new(&container, valid_svg.clone());
110+ let weak = vdom.weak();
111+
112+ weak.render().await.unwrap();
113+
114+ assert_eq!(
115+ "works",
116+ container.first_child()
117+ .expect("unable to get svg")
118+ .dyn_ref::<web_sys::Element>()
119+ .expect("svg should be an element")
120+ .get_attribute("class")
121+ .expect("unable to get 'class' of svg")
122+ );
123+}
124+
38125before_after! {
39126 same_text {
40127 before(_cx) {