mirror of
https://github.com/adoyle0/leptos-use.git
synced 2025-01-22 16:49:22 -05:00
added use_intersection_observer
This commit is contained in:
Maccesch
parent
35c8b0f40e
commit
ded00a4887
19 changed files with 775 additions and 16 deletions
11
.github/workflows/ci.yml
vendored
11
.github/workflows/ci.yml
vendored
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@ -30,11 +30,12 @@ jobs:
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run: python3 docs/generate_count_badge.py --check
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- name: Check formatting
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run: cargo fmt --check
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- name: Clippy check
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uses: auguwu/clippy-action@1.1.2
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with:
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args: --all-features --tests
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token: ${{ secrets.GITHUB_TOKEN }}
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# TODO: this action doesn't seem to work
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# - name: Clippy check
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# uses: auguwu/clippy-action@1.1.2
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# with:
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# args: --all-features --tests
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# token: ${{ secrets.GITHUB_TOKEN }}
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- name: Run tests
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run: cargo test --all-features
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2
.idea/leptos-use.iml
generated
2
.idea/leptos-use.iml
generated
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@ -24,6 +24,7 @@
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<sourceFolder url="file://$MODULE_DIR$/examples/use_media_query/src" isTestSource="false" />
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<sourceFolder url="file://$MODULE_DIR$/examples/use_storage/src" isTestSource="false" />
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<sourceFolder url="file://$MODULE_DIR$/examples/use_breakpoints/src" isTestSource="false" />
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<sourceFolder url="file://$MODULE_DIR$/examples/use_intersection_observer/src" isTestSource="false" />
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<excludeFolder url="file://$MODULE_DIR$/examples/use_event_listener/target" />
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<excludeFolder url="file://$MODULE_DIR$/target" />
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<excludeFolder url="file://$MODULE_DIR$/docs/book/book" />
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@ -44,6 +45,7 @@
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<excludeFolder url="file://$MODULE_DIR$/examples/use_media_query/target" />
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<excludeFolder url="file://$MODULE_DIR$/examples/use_storage/target" />
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<excludeFolder url="file://$MODULE_DIR$/examples/use_breakpoints/target" />
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<excludeFolder url="file://$MODULE_DIR$/examples/use_intersection_observer/target" />
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</content>
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<orderEntry type="inheritedJdk" />
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<orderEntry type="sourceFolder" forTests="false" />
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@ -1,5 +1,12 @@
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# Changelog
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## 0.2.1
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### New Functions
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- `use_intersection_observer`
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- `use_element_visibility`
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## 0.2.0
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#### Braking Changes
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@ -32,6 +32,9 @@ features = [
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"DomRectReadOnly",
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"Element",
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"HtmlLinkElement",
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"IntersectionObserver",
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"IntersectionObserverInit",
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"IntersectionObserverEntry",
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"MediaQueryList",
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"MouseEvent",
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"Navigator",
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@ -14,6 +14,8 @@
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# Elements
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- [use_element_size](elements/use_element_size.md)
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- [use_element_visibility](elements/use_element_visibility.md)
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- [use_intersection_observer](elements/use_intersection_observer.md)
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- [use_resize_observer](elements/use_resize_observer.md)
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# Browser
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3
docs/book/src/elements/use_element_visibility.md
Normal file
3
docs/book/src/elements/use_element_visibility.md
Normal file
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@ -0,0 +1,3 @@
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# use_element_visibility
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<!-- cmdrun python3 ../extract_doc_comment.py use_element_visibility -->
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3
docs/book/src/elements/use_intersection_observer.md
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3
docs/book/src/elements/use_intersection_observer.md
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@ -0,0 +1,3 @@
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# use_intersection_observer
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<!-- cmdrun python3 ../extract_doc_comment.py use_intersection_observer -->
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16
examples/use_intersection_observer/Cargo.toml
Normal file
16
examples/use_intersection_observer/Cargo.toml
Normal file
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@ -0,0 +1,16 @@
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[package]
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name = "use_intersection_observer"
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version = "0.1.0"
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edition = "2021"
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[dependencies]
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leptos = "0.3"
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console_error_panic_hook = "0.1"
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console_log = "1"
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log = "0.4"
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leptos-use = { path = "../..", features = ["docs"] }
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web-sys = "0.3"
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[dev-dependencies]
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wasm-bindgen = "0.2"
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wasm-bindgen-test = "0.3.0"
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23
examples/use_intersection_observer/README.md
Normal file
23
examples/use_intersection_observer/README.md
Normal file
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@ -0,0 +1,23 @@
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A simple example for `use_intersection_observer`.
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If you don't have it installed already, install [Trunk](https://trunkrs.dev/) and [Tailwind](https://tailwindcss.com/docs/installation)
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as well as the nightly toolchain for Rust and the wasm32-unknown-unknown target:
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```bash
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cargo install trunk
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npm install -D tailwindcss @tailwindcss/forms
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rustup toolchain install nightly
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rustup target add wasm32-unknown-unknown
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```
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Then, open two terminals. In the first one, run:
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```
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npx tailwindcss -i ./input.css -o ./style/output.css --watch
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```
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In the second one, run:
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```bash
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trunk serve --open
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```
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2
examples/use_intersection_observer/Trunk.toml
Normal file
2
examples/use_intersection_observer/Trunk.toml
Normal file
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@ -0,0 +1,2 @@
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[build]
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public_url = "/demo/"
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7
examples/use_intersection_observer/index.html
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7
examples/use_intersection_observer/index.html
Normal file
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@ -0,0 +1,7 @@
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<!DOCTYPE html>
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<html>
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<head>
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<link data-trunk rel="css" href="style/output.css">
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</head>
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<body></body>
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</html>
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3
examples/use_intersection_observer/input.css
Normal file
3
examples/use_intersection_observer/input.css
Normal file
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@ -0,0 +1,3 @@
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@tailwind base;
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@tailwind components;
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@tailwind utilities;
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2
examples/use_intersection_observer/rust-toolchain.toml
Normal file
2
examples/use_intersection_observer/rust-toolchain.toml
Normal file
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@ -0,0 +1,2 @@
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[toolchain]
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channel = "nightly"
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94
examples/use_intersection_observer/src/main.rs
Normal file
94
examples/use_intersection_observer/src/main.rs
Normal file
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@ -0,0 +1,94 @@
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use leptos::*;
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use leptos_use::docs::{demo_or_body, BooleanDisplay};
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use leptos_use::{
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use_intersection_observer_with_options, UseIntersectionObserverOptions,
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UseIntersectionObserverReturn,
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};
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#[component]
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fn Demo(cx: Scope) -> impl IntoView {
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let root = create_node_ref(cx);
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let target = create_node_ref(cx);
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let (is_visible, set_visible) = create_signal(cx, false);
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let UseIntersectionObserverReturn {
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is_active,
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pause,
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resume,
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..
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} = use_intersection_observer_with_options(
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cx,
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target,
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move |entries, _| {
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set_visible(entries[0].is_intersecting());
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},
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UseIntersectionObserverOptions::default().root(Some(root)),
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);
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view! { cx,
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<div class="text-center">
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<label class="checkbox">
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<input
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type="checkbox"
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prop:checked=is_active
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name="enabled"
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on:input=move |e| {
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if event_target_checked(&e) {
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resume();
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} else {
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pause();
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}
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}
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/>
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<span>"Enabled"</span>
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</label>
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</div>
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<div node_ref=root class="root">
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<p class="notice">"Scroll me down!"</p>
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<div node_ref=target class="target">
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<p>"Hello world!"</p>
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</div>
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</div>
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<div class="text-center">
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"Element "
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<BooleanDisplay value=is_visible true_str="inside" false_str="outside" class="font-bold"/>
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" the viewport"
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</div>
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<style>"
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.root {
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border: 2px dashed #ccc;
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height: 200px;
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margin: 2rem 1rem;
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overflow-y: scroll;
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}
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.notice {
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text-align: center;
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padding: 2em 0;
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margin-bottom: 300px;
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font-style: italic;
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font-size: 1.2rem;
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opacity: 0.8;
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}
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.target {
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border: 2px dashed var(--brand-color);
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padding: 10px;
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max-height: 150px;
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margin: 0 2rem 400px;
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}
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"</style>
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}
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}
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fn main() {
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_ = console_log::init_with_level(log::Level::Debug);
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console_error_panic_hook::set_once();
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mount_to(demo_or_body(), |cx| {
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view! { cx, <Demo /> }
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})
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}
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305
examples/use_intersection_observer/style/output.css
Normal file
305
examples/use_intersection_observer/style/output.css
Normal file
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@ -0,0 +1,305 @@
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[type='text'],[type='email'],[type='url'],[type='password'],[type='number'],[type='date'],[type='datetime-local'],[type='month'],[type='search'],[type='tel'],[type='time'],[type='week'],[multiple],textarea,select {
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-webkit-appearance: none;
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-moz-appearance: none;
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appearance: none;
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background-color: #fff;
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border-color: #6b7280;
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border-width: 1px;
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border-radius: 0px;
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padding-top: 0.5rem;
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padding-right: 0.75rem;
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padding-bottom: 0.5rem;
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padding-left: 0.75rem;
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font-size: 1rem;
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line-height: 1.5rem;
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--tw-shadow: 0 0 #0000;
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}
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[type='text']:focus, [type='email']:focus, [type='url']:focus, [type='password']:focus, [type='number']:focus, [type='date']:focus, [type='datetime-local']:focus, [type='month']:focus, [type='search']:focus, [type='tel']:focus, [type='time']:focus, [type='week']:focus, [multiple]:focus, textarea:focus, select:focus {
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outline: 2px solid transparent;
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outline-offset: 2px;
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--tw-ring-inset: var(--tw-empty,/*!*/ /*!*/);
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--tw-ring-offset-width: 0px;
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--tw-ring-offset-color: #fff;
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--tw-ring-color: #2563eb;
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--tw-ring-offset-shadow: var(--tw-ring-inset) 0 0 0 var(--tw-ring-offset-width) var(--tw-ring-offset-color);
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--tw-ring-shadow: var(--tw-ring-inset) 0 0 0 calc(1px + var(--tw-ring-offset-width)) var(--tw-ring-color);
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box-shadow: var(--tw-ring-offset-shadow), var(--tw-ring-shadow), var(--tw-shadow);
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border-color: #2563eb;
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}
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input::-moz-placeholder, textarea::-moz-placeholder {
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color: #6b7280;
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opacity: 1;
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}
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input::placeholder,textarea::placeholder {
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color: #6b7280;
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opacity: 1;
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}
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::-webkit-datetime-edit-fields-wrapper {
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padding: 0;
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}
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::-webkit-date-and-time-value {
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min-height: 1.5em;
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}
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::-webkit-datetime-edit,::-webkit-datetime-edit-year-field,::-webkit-datetime-edit-month-field,::-webkit-datetime-edit-day-field,::-webkit-datetime-edit-hour-field,::-webkit-datetime-edit-minute-field,::-webkit-datetime-edit-second-field,::-webkit-datetime-edit-millisecond-field,::-webkit-datetime-edit-meridiem-field {
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padding-top: 0;
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padding-bottom: 0;
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}
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select {
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background-image: url("data:image/svg+xml,%3csvg xmlns='http://www.w3.org/2000/svg' fill='none' viewBox='0 0 20 20'%3e%3cpath stroke='%236b7280' stroke-linecap='round' stroke-linejoin='round' stroke-width='1.5' d='M6 8l4 4 4-4'/%3e%3c/svg%3e");
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background-position: right 0.5rem center;
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background-repeat: no-repeat;
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background-size: 1.5em 1.5em;
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padding-right: 2.5rem;
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-webkit-print-color-adjust: exact;
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print-color-adjust: exact;
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}
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[multiple] {
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background-image: initial;
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background-position: initial;
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background-repeat: unset;
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background-size: initial;
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padding-right: 0.75rem;
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-webkit-print-color-adjust: unset;
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print-color-adjust: unset;
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}
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[type='checkbox'],[type='radio'] {
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-webkit-appearance: none;
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-moz-appearance: none;
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appearance: none;
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padding: 0;
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-webkit-print-color-adjust: exact;
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print-color-adjust: exact;
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display: inline-block;
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vertical-align: middle;
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background-origin: border-box;
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-webkit-user-select: none;
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-moz-user-select: none;
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user-select: none;
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flex-shrink: 0;
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height: 1rem;
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width: 1rem;
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color: #2563eb;
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background-color: #fff;
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border-color: #6b7280;
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border-width: 1px;
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--tw-shadow: 0 0 #0000;
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}
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[type='checkbox'] {
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border-radius: 0px;
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}
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[type='radio'] {
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border-radius: 100%;
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}
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[type='checkbox']:focus,[type='radio']:focus {
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outline: 2px solid transparent;
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outline-offset: 2px;
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--tw-ring-inset: var(--tw-empty,/*!*/ /*!*/);
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--tw-ring-offset-width: 2px;
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--tw-ring-offset-color: #fff;
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--tw-ring-color: #2563eb;
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--tw-ring-offset-shadow: var(--tw-ring-inset) 0 0 0 var(--tw-ring-offset-width) var(--tw-ring-offset-color);
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--tw-ring-shadow: var(--tw-ring-inset) 0 0 0 calc(2px + var(--tw-ring-offset-width)) var(--tw-ring-color);
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box-shadow: var(--tw-ring-offset-shadow), var(--tw-ring-shadow), var(--tw-shadow);
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}
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[type='checkbox']:checked,[type='radio']:checked {
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border-color: transparent;
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background-color: currentColor;
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background-size: 100% 100%;
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background-position: center;
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background-repeat: no-repeat;
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}
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[type='checkbox']:checked {
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background-image: url("data:image/svg+xml,%3csvg viewBox='0 0 16 16' fill='white' xmlns='http://www.w3.org/2000/svg'%3e%3cpath d='M12.207 4.793a1 1 0 010 1.414l-5 5a1 1 0 01-1.414 0l-2-2a1 1 0 011.414-1.414L6.5 9.086l4.293-4.293a1 1 0 011.414 0z'/%3e%3c/svg%3e");
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}
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[type='radio']:checked {
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background-image: url("data:image/svg+xml,%3csvg viewBox='0 0 16 16' fill='white' xmlns='http://www.w3.org/2000/svg'%3e%3ccircle cx='8' cy='8' r='3'/%3e%3c/svg%3e");
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}
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[type='checkbox']:checked:hover,[type='checkbox']:checked:focus,[type='radio']:checked:hover,[type='radio']:checked:focus {
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border-color: transparent;
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background-color: currentColor;
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}
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[type='checkbox']:indeterminate {
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background-image: url("data:image/svg+xml,%3csvg xmlns='http://www.w3.org/2000/svg' fill='none' viewBox='0 0 16 16'%3e%3cpath stroke='white' stroke-linecap='round' stroke-linejoin='round' stroke-width='2' d='M4 8h8'/%3e%3c/svg%3e");
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border-color: transparent;
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background-color: currentColor;
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background-size: 100% 100%;
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background-position: center;
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background-repeat: no-repeat;
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}
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[type='checkbox']:indeterminate:hover,[type='checkbox']:indeterminate:focus {
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border-color: transparent;
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background-color: currentColor;
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}
|
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|
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[type='file'] {
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background: unset;
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border-color: inherit;
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border-width: 0;
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border-radius: 0;
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padding: 0;
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font-size: unset;
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line-height: inherit;
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}
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[type='file']:focus {
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outline: 1px solid ButtonText;
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outline: 1px auto -webkit-focus-ring-color;
|
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}
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*, ::before, ::after {
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--tw-border-spacing-x: 0;
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--tw-border-spacing-y: 0;
|
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--tw-translate-x: 0;
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--tw-translate-y: 0;
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--tw-rotate: 0;
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--tw-skew-x: 0;
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--tw-skew-y: 0;
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--tw-scale-x: 1;
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--tw-scale-y: 1;
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--tw-pan-x: ;
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--tw-pan-y: ;
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--tw-pinch-zoom: ;
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--tw-scroll-snap-strictness: proximity;
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--tw-gradient-from-position: ;
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--tw-gradient-via-position: ;
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--tw-gradient-to-position: ;
|
||||
--tw-ordinal: ;
|
||||
--tw-slashed-zero: ;
|
||||
--tw-numeric-figure: ;
|
||||
--tw-numeric-spacing: ;
|
||||
--tw-numeric-fraction: ;
|
||||
--tw-ring-inset: ;
|
||||
--tw-ring-offset-width: 0px;
|
||||
--tw-ring-offset-color: #fff;
|
||||
--tw-ring-color: rgb(59 130 246 / 0.5);
|
||||
--tw-ring-offset-shadow: 0 0 #0000;
|
||||
--tw-ring-shadow: 0 0 #0000;
|
||||
--tw-shadow: 0 0 #0000;
|
||||
--tw-shadow-colored: 0 0 #0000;
|
||||
--tw-blur: ;
|
||||
--tw-brightness: ;
|
||||
--tw-contrast: ;
|
||||
--tw-grayscale: ;
|
||||
--tw-hue-rotate: ;
|
||||
--tw-invert: ;
|
||||
--tw-saturate: ;
|
||||
--tw-sepia: ;
|
||||
--tw-drop-shadow: ;
|
||||
--tw-backdrop-blur: ;
|
||||
--tw-backdrop-brightness: ;
|
||||
--tw-backdrop-contrast: ;
|
||||
--tw-backdrop-grayscale: ;
|
||||
--tw-backdrop-hue-rotate: ;
|
||||
--tw-backdrop-invert: ;
|
||||
--tw-backdrop-opacity: ;
|
||||
--tw-backdrop-saturate: ;
|
||||
--tw-backdrop-sepia: ;
|
||||
}
|
||||
|
||||
::backdrop {
|
||||
--tw-border-spacing-x: 0;
|
||||
--tw-border-spacing-y: 0;
|
||||
--tw-translate-x: 0;
|
||||
--tw-translate-y: 0;
|
||||
--tw-rotate: 0;
|
||||
--tw-skew-x: 0;
|
||||
--tw-skew-y: 0;
|
||||
--tw-scale-x: 1;
|
||||
--tw-scale-y: 1;
|
||||
--tw-pan-x: ;
|
||||
--tw-pan-y: ;
|
||||
--tw-pinch-zoom: ;
|
||||
--tw-scroll-snap-strictness: proximity;
|
||||
--tw-gradient-from-position: ;
|
||||
--tw-gradient-via-position: ;
|
||||
--tw-gradient-to-position: ;
|
||||
--tw-ordinal: ;
|
||||
--tw-slashed-zero: ;
|
||||
--tw-numeric-figure: ;
|
||||
--tw-numeric-spacing: ;
|
||||
--tw-numeric-fraction: ;
|
||||
--tw-ring-inset: ;
|
||||
--tw-ring-offset-width: 0px;
|
||||
--tw-ring-offset-color: #fff;
|
||||
--tw-ring-color: rgb(59 130 246 / 0.5);
|
||||
--tw-ring-offset-shadow: 0 0 #0000;
|
||||
--tw-ring-shadow: 0 0 #0000;
|
||||
--tw-shadow: 0 0 #0000;
|
||||
--tw-shadow-colored: 0 0 #0000;
|
||||
--tw-blur: ;
|
||||
--tw-brightness: ;
|
||||
--tw-contrast: ;
|
||||
--tw-grayscale: ;
|
||||
--tw-hue-rotate: ;
|
||||
--tw-invert: ;
|
||||
--tw-saturate: ;
|
||||
--tw-sepia: ;
|
||||
--tw-drop-shadow: ;
|
||||
--tw-backdrop-blur: ;
|
||||
--tw-backdrop-brightness: ;
|
||||
--tw-backdrop-contrast: ;
|
||||
--tw-backdrop-grayscale: ;
|
||||
--tw-backdrop-hue-rotate: ;
|
||||
--tw-backdrop-invert: ;
|
||||
--tw-backdrop-opacity: ;
|
||||
--tw-backdrop-saturate: ;
|
||||
--tw-backdrop-sepia: ;
|
||||
}
|
||||
|
||||
.static {
|
||||
position: static;
|
||||
}
|
||||
|
||||
.border {
|
||||
border-width: 1px;
|
||||
}
|
||||
|
||||
.text-center {
|
||||
text-align: center;
|
||||
}
|
||||
|
||||
.font-bold {
|
||||
font-weight: 700;
|
||||
}
|
||||
|
||||
.italic {
|
||||
font-style: italic;
|
||||
}
|
||||
|
||||
.text-\[--brand-color\] {
|
||||
color: var(--brand-color);
|
||||
}
|
||||
|
||||
.text-green-600 {
|
||||
--tw-text-opacity: 1;
|
||||
color: rgb(22 163 74 / var(--tw-text-opacity));
|
||||
}
|
||||
|
||||
.opacity-75 {
|
||||
opacity: 0.75;
|
||||
}
|
||||
|
||||
@media (prefers-color-scheme: dark) {
|
||||
.dark\:text-green-500 {
|
||||
--tw-text-opacity: 1;
|
||||
color: rgb(34 197 94 / var(--tw-text-opacity));
|
||||
}
|
||||
}
|
||||
15
examples/use_intersection_observer/tailwind.config.js
Normal file
15
examples/use_intersection_observer/tailwind.config.js
Normal file
|
|
@ -0,0 +1,15 @@
|
|||
/** @type {import('tailwindcss').Config} */
|
||||
module.exports = {
|
||||
content: {
|
||||
files: ["*.html", "./src/**/*.rs", "../../src/docs/**/*.rs"],
|
||||
},
|
||||
theme: {
|
||||
extend: {},
|
||||
},
|
||||
corePlugins: {
|
||||
preflight: false,
|
||||
},
|
||||
plugins: [
|
||||
require('@tailwindcss/forms'),
|
||||
],
|
||||
}
|
||||
|
|
@ -4,12 +4,12 @@ use leptos::*;
|
|||
pub fn BooleanDisplay(
|
||||
cx: Scope,
|
||||
#[prop(into)] value: MaybeSignal<bool>,
|
||||
#[prop(optional)] class: String,
|
||||
#[prop(optional, into)] class: String,
|
||||
#[prop(default = "true")] true_str: &'static str,
|
||||
#[prop(default = "false")] false_str: &'static str,
|
||||
) -> impl IntoView {
|
||||
let true_class = "text-green-600 dark:text-green-500";
|
||||
let false_class = "text-[--brand-color]";
|
||||
let true_str = "true";
|
||||
let false_str = "false";
|
||||
|
||||
let class = move || {
|
||||
format!(
|
||||
|
|
|
|||
20
src/lib.rs
20
src/lib.rs
|
|
@ -10,18 +10,25 @@ pub mod math;
|
|||
pub mod storage;
|
||||
pub mod utils;
|
||||
|
||||
mod use_breakpoints;
|
||||
mod use_debounce_fn;
|
||||
#[cfg(web_sys_unstable_apis)]
|
||||
mod use_element_size;
|
||||
#[cfg(web_sys_unstable_apis)]
|
||||
mod use_resize_observer;
|
||||
|
||||
#[cfg(web_sys_unstable_apis)]
|
||||
pub use use_element_size::*;
|
||||
#[cfg(web_sys_unstable_apis)]
|
||||
pub use use_resize_observer::*;
|
||||
|
||||
mod use_breakpoints;
|
||||
mod use_debounce_fn;
|
||||
mod use_event_listener;
|
||||
mod use_favicon;
|
||||
mod use_intersection_observer;
|
||||
mod use_media_query;
|
||||
mod use_mouse;
|
||||
mod use_preferred_contrast;
|
||||
mod use_preferred_dark;
|
||||
#[cfg(web_sys_unstable_apis)]
|
||||
mod use_resize_observer;
|
||||
mod use_scroll;
|
||||
mod use_supported;
|
||||
mod use_throttle_fn;
|
||||
|
|
@ -32,16 +39,13 @@ mod watch_throttled;
|
|||
|
||||
pub use use_breakpoints::*;
|
||||
pub use use_debounce_fn::*;
|
||||
#[cfg(web_sys_unstable_apis)]
|
||||
pub use use_element_size::*;
|
||||
pub use use_event_listener::*;
|
||||
pub use use_favicon::*;
|
||||
pub use use_intersection_observer::*;
|
||||
pub use use_media_query::*;
|
||||
pub use use_mouse::*;
|
||||
pub use use_preferred_contrast::*;
|
||||
pub use use_preferred_dark::*;
|
||||
#[cfg(web_sys_unstable_apis)]
|
||||
pub use use_resize_observer::*;
|
||||
pub use use_scroll::*;
|
||||
pub use use_supported::*;
|
||||
pub use use_throttle_fn::*;
|
||||
|
|
|
|||
267
src/use_intersection_observer.rs
Normal file
267
src/use_intersection_observer.rs
Normal file
|
|
@ -0,0 +1,267 @@
|
|||
use crate::core::ElementMaybeSignal;
|
||||
use crate::{watch_with_options, WatchOptions};
|
||||
use default_struct_builder::DefaultBuilder;
|
||||
use leptos::*;
|
||||
use std::cell::RefCell;
|
||||
use std::marker::PhantomData;
|
||||
use std::rc::Rc;
|
||||
use wasm_bindgen::prelude::*;
|
||||
|
||||
/// Reactive [IntersectionObserver](https://developer.mozilla.org/en-US/docs/Web/API/IntersectionObserver).
|
||||
///
|
||||
/// Detects that a target element's visibility inside the viewport.
|
||||
///
|
||||
/// ## Demo
|
||||
///
|
||||
/// [Link to Demo](https://github.com/Synphonyte/leptos-use/tree/main/examples/use_intersection_observer)
|
||||
///
|
||||
/// ## Usage
|
||||
///
|
||||
/// ```
|
||||
/// # use leptos::*;
|
||||
/// # use leptos_use::use_intersection_observer;
|
||||
/// #
|
||||
/// # #[component]
|
||||
/// # fn Demo(cx: Scope) -> impl IntoView {
|
||||
/// let el = create_node_ref(cx);
|
||||
/// let (is_visible, set_visible) = create_signal(cx, false);
|
||||
///
|
||||
/// use_intersection_observer(
|
||||
/// cx,
|
||||
/// el,
|
||||
/// move |entries, _| {
|
||||
/// set_visible(entries[0].is_intersecting());
|
||||
/// },
|
||||
/// );
|
||||
///
|
||||
/// view! { cx,
|
||||
/// <div node_ref=el>
|
||||
/// <h1>"Hello World"</h1>
|
||||
/// </div>
|
||||
/// }
|
||||
/// # }
|
||||
/// ```
|
||||
///
|
||||
/// ## See also
|
||||
///
|
||||
/// * [`use_element_visibility`]
|
||||
pub fn use_intersection_observer<El, T, F>(
|
||||
cx: Scope,
|
||||
target: El,
|
||||
callback: F,
|
||||
) -> UseIntersectionObserverReturn<impl Fn() + Clone, impl Fn() + Clone, impl Fn() + Clone>
|
||||
where
|
||||
(Scope, El): Into<ElementMaybeSignal<T, web_sys::Element>>,
|
||||
T: Into<web_sys::Element> + Clone + 'static,
|
||||
F: FnMut(Vec<web_sys::IntersectionObserverEntry>, web_sys::IntersectionObserver)
|
||||
+ Clone
|
||||
+ 'static,
|
||||
{
|
||||
use_intersection_observer_with_options::<El, T, web_sys::Element, web_sys::Element, F>(
|
||||
cx,
|
||||
target,
|
||||
callback,
|
||||
UseIntersectionObserverOptions::default(),
|
||||
)
|
||||
}
|
||||
|
||||
/// Version of [`use_intersection_observer`] that takes a [`UseIntersectionObserverOptions`]. See [`use_intersection_observer`] for how to use.
|
||||
pub fn use_intersection_observer_with_options<El, T, RootEl, RootT, F>(
|
||||
cx: Scope,
|
||||
target: El,
|
||||
callback: F,
|
||||
options: UseIntersectionObserverOptions<RootEl, RootT>,
|
||||
) -> UseIntersectionObserverReturn<impl Fn() + Clone, impl Fn() + Clone, impl Fn() + Clone>
|
||||
where
|
||||
(Scope, El): Into<ElementMaybeSignal<T, web_sys::Element>>,
|
||||
T: Into<web_sys::Element> + Clone + 'static,
|
||||
(Scope, RootEl): Into<ElementMaybeSignal<RootT, web_sys::Element>>,
|
||||
RootT: Into<web_sys::Element> + Clone + 'static,
|
||||
F: FnMut(Vec<web_sys::IntersectionObserverEntry>, web_sys::IntersectionObserver)
|
||||
+ Clone
|
||||
+ 'static,
|
||||
{
|
||||
let UseIntersectionObserverOptions {
|
||||
immediate,
|
||||
root,
|
||||
root_margin,
|
||||
thresholds,
|
||||
..
|
||||
} = options;
|
||||
|
||||
let (is_active, set_active) = create_signal(cx, immediate);
|
||||
|
||||
let observer: Rc<RefCell<Option<web_sys::IntersectionObserver>>> = Rc::new(RefCell::new(None));
|
||||
|
||||
let obs = Rc::clone(&observer);
|
||||
let cleanup = move || {
|
||||
if let Some(o) = obs.take() {
|
||||
o.disconnect();
|
||||
}
|
||||
};
|
||||
|
||||
let target = (cx, target).into();
|
||||
let root = root.map(|root| (cx, root).into());
|
||||
let clean = cleanup.clone();
|
||||
|
||||
let stop_watch = watch_with_options(
|
||||
cx,
|
||||
move || {
|
||||
(
|
||||
target.get(),
|
||||
root.as_ref().map(|root| root.get()),
|
||||
is_active.get(),
|
||||
)
|
||||
},
|
||||
move |values, _, _| {
|
||||
let (target, root, is_active) = values;
|
||||
|
||||
clean();
|
||||
|
||||
if !is_active {
|
||||
return;
|
||||
}
|
||||
|
||||
if let Some(target) = target {
|
||||
let mut callback = callback.clone();
|
||||
let closure =
|
||||
Closure::<dyn FnMut(js_sys::Array, web_sys::IntersectionObserver)>::new(
|
||||
move |entries: js_sys::Array, observer| {
|
||||
callback(
|
||||
entries
|
||||
.to_vec()
|
||||
.into_iter()
|
||||
.map(|v| {
|
||||
v.unchecked_into::<web_sys::IntersectionObserverEntry>()
|
||||
})
|
||||
.collect(),
|
||||
observer,
|
||||
);
|
||||
},
|
||||
);
|
||||
|
||||
let mut options = web_sys::IntersectionObserverInit::new();
|
||||
options.root_margin(&root_margin).threshold(
|
||||
&thresholds
|
||||
.iter()
|
||||
.copied()
|
||||
.map(JsValue::from)
|
||||
.collect::<js_sys::Array>(),
|
||||
);
|
||||
|
||||
if let Some(Some(root)) = root {
|
||||
let root: web_sys::Element = root.clone().into();
|
||||
options.root(Some(&root));
|
||||
}
|
||||
|
||||
let obs = web_sys::IntersectionObserver::new_with_options(
|
||||
closure.as_ref().unchecked_ref(),
|
||||
&options,
|
||||
)
|
||||
.expect("failed to create IntersectionObserver");
|
||||
|
||||
closure.forget();
|
||||
|
||||
let target: web_sys::Element = target.clone().into();
|
||||
obs.observe(&target);
|
||||
|
||||
observer.replace(Some(obs));
|
||||
}
|
||||
},
|
||||
WatchOptions::default().immediate(immediate),
|
||||
);
|
||||
|
||||
let clean = cleanup.clone();
|
||||
|
||||
let stop = move || {
|
||||
clean();
|
||||
stop_watch();
|
||||
};
|
||||
|
||||
on_cleanup(cx, stop.clone());
|
||||
|
||||
let clean = cleanup.clone();
|
||||
|
||||
UseIntersectionObserverReturn {
|
||||
is_active: is_active.into(),
|
||||
pause: move || {
|
||||
clean();
|
||||
set_active(false);
|
||||
},
|
||||
resume: move || {
|
||||
cleanup();
|
||||
set_active(true);
|
||||
},
|
||||
stop,
|
||||
}
|
||||
}
|
||||
|
||||
/// Options for [`use_intersection_observer_with_options`].
|
||||
#[derive(DefaultBuilder)]
|
||||
pub struct UseIntersectionObserverOptions<El, T>
|
||||
where
|
||||
(Scope, El): Into<ElementMaybeSignal<T, web_sys::Element>>,
|
||||
T: Into<web_sys::Element> + Clone + 'static,
|
||||
{
|
||||
/// If `true`, the `IntersectionObserver` will be attached immediately. Otherwise it
|
||||
/// will only be attached after the returned `resume` closure is called. That is
|
||||
/// `use_intersections_observer` will be started "paused".
|
||||
immediate: bool,
|
||||
|
||||
/// A `web_sys::Element` or `web_sys::Document` object which is an ancestor of the intended `target`,
|
||||
/// whose bounding rectangle will be considered the viewport.
|
||||
/// Any part of the target not visible in the visible area of the `root` is not considered visible.
|
||||
/// Defaults to `None` (which means the root `document` will be used).
|
||||
/// Please note that setting this to a `Some(document)` may not be supported by all browsers.
|
||||
/// See [Browser Compatibility](https://developer.mozilla.org/en-US/docs/Web/API/IntersectionObserver/IntersectionObserver#browser_compatibility)
|
||||
root: Option<El>,
|
||||
|
||||
/// A string which specifies a set of offsets to add to the root's [bounding box](https://developer.mozilla.org/en-US/docs/Glossary/Bounding_box)
|
||||
/// when calculating intersections, effectively shrinking or growing the root for calculation purposes. The syntax is approximately the same as that for the CSS
|
||||
/// [`margin`](https://developer.mozilla.org/en-US/docs/Web/CSS/margin) property; see
|
||||
/// [The intersection root and root margin](https://developer.mozilla.org/en-US/docs/Web/API/Intersection_Observer_API#the_intersection_root_and_root_margin)
|
||||
/// for more information on how the margin works and the syntax. The default is `"0px"`.
|
||||
#[builder(into)]
|
||||
root_margin: String,
|
||||
|
||||
// TODO : validate that each number is between 0 and 1 ?
|
||||
/// A `Vec` of numbers between 0.0 and 1.0, specifying a ratio of intersection area to total
|
||||
/// bounding box area for the observed target. A value of 0.0 means that even a single
|
||||
/// visible pixel counts as the target being visible. 1.0 means that the entire target
|
||||
/// element is visible. See [Thresholds](https://developer.mozilla.org/en-US/docs/Web/API/Intersection_Observer_API#thresholds)
|
||||
/// for a more in-depth description of how thresholds are used.
|
||||
/// The default is a single threshold of `[0.0]`.
|
||||
thresholds: Vec<f64>,
|
||||
|
||||
#[builder(skip)]
|
||||
_marker: PhantomData<T>,
|
||||
}
|
||||
|
||||
impl Default for UseIntersectionObserverOptions<web_sys::Element, web_sys::Element> {
|
||||
fn default() -> Self {
|
||||
Self {
|
||||
immediate: true,
|
||||
root: None,
|
||||
root_margin: "0px".into(),
|
||||
thresholds: vec![0.0],
|
||||
_marker: PhantomData,
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
/// The return value of [`use_intersection_observer`].
|
||||
pub struct UseIntersectionObserverReturn<StopFn, PauseFn, ResumeFn>
|
||||
where
|
||||
StopFn: Fn() + Clone,
|
||||
PauseFn: Fn() + Clone,
|
||||
ResumeFn: Fn() + Clone,
|
||||
{
|
||||
/// Pauses the `IntersectionObserver` observations. Will cause `is_active = false`.
|
||||
pub pause: PauseFn,
|
||||
/// Resumes the `IntersectionObserver` observations. Will cause `is_active = true`.
|
||||
pub resume: ResumeFn,
|
||||
/// Stops the `IntersectionObserver` observations altogether.
|
||||
pub stop: StopFn,
|
||||
/// A signal which is `true` when the `IntersectionObserver` is active, and `false` when paused or stopped.
|
||||
pub is_active: Signal<bool>,
|
||||
}
|
||||
Loading…
Add table
Reference in a new issue