added sync_signal

This commit is contained in:
Maccesch 2024-04-10 00:21:08 +01:00
parent db081cca07
commit f3fbf1bc28
17 changed files with 826 additions and 0 deletions

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@ -3,6 +3,12 @@
The format is based on [Keep a Changelog](https://keepachangelog.com/en/1.0.0/), The format is based on [Keep a Changelog](https://keepachangelog.com/en/1.0.0/),
and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0.html). and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0.html).
## [Unreleased] -
### New Functions 🚀
- `sync_signal`
## [0.10.6] - 2024-04-02 ## [0.10.6] - 2024-04-02
### Fixes 🍕 ### Fixes 🍕

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@ -87,6 +87,7 @@
- [signal_debounced](reactivity/signal_debounced.md) - [signal_debounced](reactivity/signal_debounced.md)
- [signal_throttled](reactivity/signal_throttled.md) - [signal_throttled](reactivity/signal_throttled.md)
- [sync_signal](reactivity/sync_signal.md)
# Iterable # Iterable

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@ -0,0 +1,3 @@
# sync_signal
<!-- cmdrun python3 ../extract_doc_comment.py sync_signal -->

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@ -5,6 +5,7 @@ members = [
"on_click_outside", "on_click_outside",
"signal_debounced", "signal_debounced",
"signal_throttled", "signal_throttled",
"sync_signal",
"use_abs", "use_abs",
"use_active_element", "use_active_element",
"use_and", "use_and",

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@ -0,0 +1,16 @@
[package]
name = "sync_signal"
version = "0.1.0"
edition = "2021"
[dependencies]
leptos = { version = "0.6", features = ["nightly", "csr"] }
console_error_panic_hook = "0.1"
console_log = "1"
log = "0.4"
leptos-use = { path = "../..", features = ["docs"] }
web-sys = "0.3"
[dev-dependencies]
wasm-bindgen = "0.2"
wasm-bindgen-test = "0.3.0"

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@ -0,0 +1,23 @@
A simple example for `sync_signal`.
If you don't have it installed already, install [Trunk](https://trunkrs.dev/) and [Tailwind](https://tailwindcss.com/docs/installation)
as well as the nightly toolchain for Rust and the wasm32-unknown-unknown target:
```bash
cargo install trunk
npm install -D tailwindcss @tailwindcss/forms
rustup toolchain install nightly
rustup target add wasm32-unknown-unknown
```
Then, open two terminals. In the first one, run:
```
npx tailwindcss -i ./input.css -o ./style/output.css --watch
```
In the second one, run:
```bash
trunk serve --open
```

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@ -0,0 +1,2 @@
[build]
public_url = "/demo/"

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@ -0,0 +1,7 @@
<!DOCTYPE html>
<html>
<head>
<link data-trunk rel="css" href="style/output.css">
</head>
<body></body>
</html>

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@ -0,0 +1,3 @@
@tailwind base;
@tailwind components;
@tailwind utilities;

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[toolchain]
channel = "nightly"

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@ -0,0 +1,25 @@
use leptos::*;
use leptos_use::docs::demo_or_body;
use leptos_use::sync_signal;
#[component]
fn Demo() -> impl IntoView {
let (a, set_a) = create_signal(String::new());
let (b, set_b) = create_signal(String::new());
let _ = sync_signal((a, set_a), (b, set_b));
view! {
<input prop:value=a on:input=move |e| set_a(event_target_value(&e)) placeholder="A" type="text" />
<input prop:value=b on:input=move |e| set_b(event_target_value(&e)) placeholder="B" type="text" />
}
}
fn main() {
_ = console_log::init_with_level(log::Level::Debug);
console_error_panic_hook::set_once();
mount_to(demo_or_body(), || {
view! { <Demo/> }
})
}

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@ -0,0 +1,289 @@
[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 {
-webkit-appearance: none;
-moz-appearance: none;
appearance: none;
background-color: #fff;
border-color: #6b7280;
border-width: 1px;
border-radius: 0px;
padding-top: 0.5rem;
padding-right: 0.75rem;
padding-bottom: 0.5rem;
padding-left: 0.75rem;
font-size: 1rem;
line-height: 1.5rem;
--tw-shadow: 0 0 #0000;
}
[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 {
outline: 2px solid transparent;
outline-offset: 2px;
--tw-ring-inset: var(--tw-empty,/*!*/ /*!*/);
--tw-ring-offset-width: 0px;
--tw-ring-offset-color: #fff;
--tw-ring-color: #2563eb;
--tw-ring-offset-shadow: var(--tw-ring-inset) 0 0 0 var(--tw-ring-offset-width) var(--tw-ring-offset-color);
--tw-ring-shadow: var(--tw-ring-inset) 0 0 0 calc(1px + var(--tw-ring-offset-width)) var(--tw-ring-color);
box-shadow: var(--tw-ring-offset-shadow), var(--tw-ring-shadow), var(--tw-shadow);
border-color: #2563eb;
}
input::-moz-placeholder, textarea::-moz-placeholder {
color: #6b7280;
opacity: 1;
}
input::placeholder,textarea::placeholder {
color: #6b7280;
opacity: 1;
}
::-webkit-datetime-edit-fields-wrapper {
padding: 0;
}
::-webkit-date-and-time-value {
min-height: 1.5em;
}
::-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 {
padding-top: 0;
padding-bottom: 0;
}
select {
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");
background-position: right 0.5rem center;
background-repeat: no-repeat;
background-size: 1.5em 1.5em;
padding-right: 2.5rem;
-webkit-print-color-adjust: exact;
print-color-adjust: exact;
}
[multiple] {
background-image: initial;
background-position: initial;
background-repeat: unset;
background-size: initial;
padding-right: 0.75rem;
-webkit-print-color-adjust: unset;
print-color-adjust: unset;
}
[type='checkbox'],[type='radio'] {
-webkit-appearance: none;
-moz-appearance: none;
appearance: none;
padding: 0;
-webkit-print-color-adjust: exact;
print-color-adjust: exact;
display: inline-block;
vertical-align: middle;
background-origin: border-box;
-webkit-user-select: none;
-moz-user-select: none;
user-select: none;
flex-shrink: 0;
height: 1rem;
width: 1rem;
color: #2563eb;
background-color: #fff;
border-color: #6b7280;
border-width: 1px;
--tw-shadow: 0 0 #0000;
}
[type='checkbox'] {
border-radius: 0px;
}
[type='radio'] {
border-radius: 100%;
}
[type='checkbox']:focus,[type='radio']:focus {
outline: 2px solid transparent;
outline-offset: 2px;
--tw-ring-inset: var(--tw-empty,/*!*/ /*!*/);
--tw-ring-offset-width: 2px;
--tw-ring-offset-color: #fff;
--tw-ring-color: #2563eb;
--tw-ring-offset-shadow: var(--tw-ring-inset) 0 0 0 var(--tw-ring-offset-width) var(--tw-ring-offset-color);
--tw-ring-shadow: var(--tw-ring-inset) 0 0 0 calc(2px + var(--tw-ring-offset-width)) var(--tw-ring-color);
box-shadow: var(--tw-ring-offset-shadow), var(--tw-ring-shadow), var(--tw-shadow);
}
[type='checkbox']:checked,[type='radio']:checked {
border-color: transparent;
background-color: currentColor;
background-size: 100% 100%;
background-position: center;
background-repeat: no-repeat;
}
[type='checkbox']:checked {
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");
}
[type='radio']:checked {
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");
}
[type='checkbox']:checked:hover,[type='checkbox']:checked:focus,[type='radio']:checked:hover,[type='radio']:checked:focus {
border-color: transparent;
background-color: currentColor;
}
[type='checkbox']:indeterminate {
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");
border-color: transparent;
background-color: currentColor;
background-size: 100% 100%;
background-position: center;
background-repeat: no-repeat;
}
[type='checkbox']:indeterminate:hover,[type='checkbox']:indeterminate:focus {
border-color: transparent;
background-color: currentColor;
}
[type='file'] {
background: unset;
border-color: inherit;
border-width: 0;
border-radius: 0;
padding: 0;
font-size: unset;
line-height: inherit;
}
[type='file']:focus {
outline: 1px solid ButtonText;
outline: 1px auto -webkit-focus-ring-color;
}
*, ::before, ::after {
--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;
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--tw-scale-x: 1;
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--tw-scroll-snap-strictness: proximity;
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--tw-gradient-via-position: ;
--tw-gradient-to-position: ;
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--tw-ring-color: rgb(59 130 246 / 0.5);
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--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: ;
}
.block {
display: block;
}
.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));
}
}

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/** @type {import('tailwindcss').Config} */
module.exports = {
content: {
files: ["*.html", "./src/**/*.rs", "../../src/docs/**/*.rs"],
},
theme: {
extend: {},
},
corePlugins: {
preflight: false,
},
plugins: [
require('@tailwindcss/forms'),
],
}

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@ -10,6 +10,7 @@ mod size;
mod ssr_safe_method; mod ssr_safe_method;
mod storage; mod storage;
pub(crate) mod url; pub(crate) mod url;
mod use_rw_signal;
pub use connection_ready_state::*; pub use connection_ready_state::*;
pub(crate) use datetime::*; pub(crate) use datetime::*;
@ -22,3 +23,4 @@ pub use position::*;
pub use size::*; pub use size::*;
pub(crate) use ssr_safe_method::*; pub(crate) use ssr_safe_method::*;
pub use storage::*; pub use storage::*;
pub use use_rw_signal::*;

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src/core/use_rw_signal.rs Normal file
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use leptos::*;
pub enum UseRwSignal<T: 'static> {
Separate(Signal<T>, WriteSignal<T>),
Combined(RwSignal<T>),
}
impl<T> From<RwSignal<T>> for UseRwSignal<T> {
fn from(s: RwSignal<T>) -> Self {
Self::Combined(s)
}
}
impl<T, RS> From<(RS, WriteSignal<T>)> for UseRwSignal<T>
where
RS: Into<Signal<T>>,
{
fn from(s: (RS, WriteSignal<T>)) -> Self {
Self::Separate(s.0.into(), s.1)
}
}
impl<T> Default for UseRwSignal<T>
where
T: Default,
{
fn default() -> Self {
Self::Combined(Default::default())
}
}
impl<T> Clone for UseRwSignal<T> {
fn clone(&self) -> Self {
match self {
Self::Separate(s, w) => Self::Separate(s.clone(), w.clone()),
Self::Combined(s) => Self::Combined(s.clone()),
}
}
}
impl<T> Copy for UseRwSignal<T> {}
impl<T> SignalGet for UseRwSignal<T>
where
T: Clone,
{
type Value = T;
fn get(&self) -> T {
match self {
Self::Separate(s, _) => s.get(),
Self::Combined(s) => s.get(),
}
}
fn try_get(&self) -> Option<T> {
match self {
Self::Separate(s, _) => s.try_get(),
Self::Combined(s) => s.try_get(),
}
}
}
impl<T> SignalGetUntracked for UseRwSignal<T>
where
T: Clone,
{
type Value = T;
fn get_untracked(&self) -> T {
match self {
Self::Separate(s, _) => s.get_untracked(),
Self::Combined(s) => s.get_untracked(),
}
}
fn try_get_untracked(&self) -> Option<T> {
match self {
Self::Separate(s, _) => s.try_get_untracked(),
Self::Combined(s) => s.try_get_untracked(),
}
}
}
impl<T> SignalWith for UseRwSignal<T> {
type Value = T;
fn with<R>(&self, f: impl FnOnce(&T) -> R) -> R {
match self {
Self::Separate(s, _) => s.with(f),
Self::Combined(s) => s.with(f),
}
}
fn try_with<R>(&self, f: impl FnOnce(&T) -> R) -> Option<R> {
match self {
Self::Separate(s, _) => s.try_with(f),
Self::Combined(s) => s.try_with(f),
}
}
}
impl<T> SignalWithUntracked for UseRwSignal<T> {
type Value = T;
fn with_untracked<R>(&self, f: impl FnOnce(&T) -> R) -> R {
match self {
Self::Separate(s, _) => s.with_untracked(f),
Self::Combined(s) => s.with_untracked(f),
}
}
fn try_with_untracked<R>(&self, f: impl FnOnce(&T) -> R) -> Option<R> {
match self {
Self::Separate(s, _) => s.try_with_untracked(f),
Self::Combined(s) => s.try_with_untracked(f),
}
}
}
impl<T> SignalSet for UseRwSignal<T> {
type Value = T;
fn set(&self, new_value: T) {
match *self {
Self::Separate(_, s) => s.set(new_value),
Self::Combined(s) => s.set(new_value),
}
}
fn try_set(&self, new_value: T) -> Option<T> {
match *self {
Self::Separate(_, s) => s.try_set(new_value),
Self::Combined(s) => s.try_set(new_value),
}
}
}
impl<T> SignalSetUntracked<T> for UseRwSignal<T> {
fn set_untracked(&self, new_value: T) {
match self {
Self::Separate(_, s) => s.set_untracked(new_value),
Self::Combined(s) => s.set_untracked(new_value),
}
}
fn try_set_untracked(&self, new_value: T) -> Option<T> {
match self {
Self::Separate(_, s) => s.try_set_untracked(new_value),
Self::Combined(s) => s.try_set_untracked(new_value),
}
}
}
impl<T> SignalUpdate for UseRwSignal<T> {
type Value = T;
fn update(&self, f: impl FnOnce(&mut T)) {
match self {
Self::Separate(_, s) => s.update(f),
Self::Combined(s) => s.update(f),
}
}
fn try_update<O>(&self, f: impl FnOnce(&mut T) -> O) -> Option<O> {
match self {
Self::Separate(_, s) => s.try_update(f),
Self::Combined(s) => s.try_update(f),
}
}
}

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@ -24,6 +24,7 @@ mod is_none;
mod is_ok; mod is_ok;
mod is_some; mod is_some;
mod on_click_outside; mod on_click_outside;
mod sync_signal;
mod signal_debounced; mod signal_debounced;
mod signal_throttled; mod signal_throttled;
mod use_active_element; mod use_active_element;
@ -88,6 +89,7 @@ pub use is_none::*;
pub use is_ok::*; pub use is_ok::*;
pub use is_some::*; pub use is_some::*;
pub use on_click_outside::*; pub use on_click_outside::*;
pub use sync_signal::*;
pub use signal_debounced::*; pub use signal_debounced::*;
pub use signal_throttled::*; pub use signal_throttled::*;
pub use use_active_element::*; pub use use_active_element::*;

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src/sync_signal.rs Normal file
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@ -0,0 +1,258 @@
use crate::core::UseRwSignal;
use default_struct_builder::DefaultBuilder;
use leptos::*;
use std::fmt::Debug;
use std::rc::Rc;
/// Two-way Signals synchronization.
///
/// > Note: Please consider first if you can achieve your goals with the
/// > ["Good Options" described in the Leptos book](https://book.leptos.dev/reactivity/working_with_signals.html#making-signals-depend-on-each-other)
/// > firstly. Only if you really have to, use this function. This is in effect the
/// > ["If you really must..."](https://book.leptos.dev/reactivity/working_with_signals.html#if-you-really-must).
///
/// ## Demo
///
/// [Link to Demo](https://github.com/Synphonyte/leptos-use/tree/main/examples/sync_signal)
///
/// ## Usage
///
/// ```
/// # use leptos::*;
/// # use leptos_use::sync_signal;
/// #
/// # #[component]
/// # fn Demo() -> impl IntoView {
/// let (a, set_a) = create_signal(1);
/// let (b, set_b) = create_signal(2);
///
/// let stop = sync_signal((a, set_a), (b, set_b));
///
/// logging::log!("a: {}, b: {}", a.get(), b.get()); // a: 1, b: 1
///
/// set_b.set(3);
///
/// logging::log!("a: {}, b: {}", a.get(), b.get()); // a: 3, b: 3
///
/// set_a.set(4);
///
/// logging::log!("a: {}, b: {}", a.get(), b.get()); // a: 4, b: 4
/// #
/// # view! { }
/// # }
/// ```
///
/// ### `RwSignal`
///
/// You can mix and match `RwSignal`s and `Signal`-`WriteSignal` pairs.
///
/// ```
/// # use leptos::*;
/// # use leptos_use::sync_signal;
/// #
/// # #[component]
/// # fn Demo() -> impl IntoView {
/// let (a, set_a) = create_signal(1);
/// let (b, set_b) = create_signal(2);
/// let c_rw = create_rw_signal(3);
/// let d_rw = create_rw_signal(4);
///
/// sync_signal((a, set_a), c_rw);
/// sync_signal(d_rw, (b, set_b));
/// sync_signal(c_rw, d_rw);
///
/// #
/// # view! { }
/// # }
/// ```
///
/// ### One directional
///
/// You can synchronize a signal only from left to right or right to left.
///
/// ```
/// # use leptos::*;
/// # use leptos_use::{sync_signal_with_options, SyncSignalOptions, SyncDirection};
/// #
/// # #[component]
/// # fn Demo() -> impl IntoView {
/// let (a, set_a) = create_signal(1);
/// let (b, set_b) = create_signal(2);
///
/// let stop = sync_signal_with_options(
/// (a, set_a),
/// (b, set_b),
/// SyncSignalOptions::default().direction(SyncDirection::LeftToRight)
/// );
///
/// set_b.set(3); // doesn't sync
///
/// logging::log!("a: {}, b: {}", a.get(), b.get()); // a: 1, b: 3
///
/// set_a.set(4);
///
/// logging::log!("a: {}, b: {}", a.get(), b.get()); // a: 4, b: 4
/// #
/// # view! { }
/// # }
/// ```
///
/// ### Custom Transform
///
/// You can optionally provide custom transforms between the two signals.
/// ```
/// # use leptos::*;
/// # use leptos_use::{sync_signal_with_options, SyncSignalOptions};
/// #
/// # #[component]
/// # fn Demo() -> impl IntoView {
/// let (a, set_a) = create_signal(10);
/// let (b, set_b) = create_signal(2);
///
/// let stop = sync_signal_with_options(
/// (a, set_a),
/// (b, set_b),
/// SyncSignalOptions::default()
/// .transform_ltr(|left| *left * 2)
/// .transform_rtl(|right| *right / 2)
/// );
///
/// logging::log!("a: {}, b: {}", a.get(), b.get()); // a: 10, b: 20
///
/// set_b.set(30);
///
/// logging::log!("a: {}, b: {}", a.get(), b.get()); // a: 15, b: 30
/// #
/// # view! { }
/// # }
/// ```
pub fn sync_signal<T>(
left: impl Into<UseRwSignal<T>>,
right: impl Into<UseRwSignal<T>>,
) -> impl Fn() + Clone
where
T: Clone + PartialEq + 'static,
{
sync_signal_with_options(left, right, SyncSignalOptions::default())
}
/// Version of [`sync_signal`] that takes a `SyncSignalOptions`. See [`sync_signal`] for how to use.
pub fn sync_signal_with_options<L, R>(
left: impl Into<UseRwSignal<L>>,
right: impl Into<UseRwSignal<R>>,
options: SyncSignalOptions<L, R>,
) -> impl Fn() + Clone
where
L: Clone + PartialEq + 'static,
R: Clone + PartialEq + 'static,
{
let SyncSignalOptions {
immediate,
direction,
transform_ltr,
transform_rtl,
} = options;
let left = left.into();
let right = right.into();
let mut stop_watch_left = None;
let mut stop_watch_right = None;
if matches!(direction, SyncDirection::Both | SyncDirection::LeftToRight) {
stop_watch_left = Some(watch(
move || left.get(),
move |new_value, _, _| {
let new_value = (*transform_ltr)(new_value);
if right.with_untracked(|right| right != &new_value) {
right.update(|right| *right = new_value);
}
},
immediate,
));
}
if matches!(direction, SyncDirection::Both | SyncDirection::RightToLeft) {
stop_watch_right = Some(watch(
move || right.get(),
move |new_value, _, _| {
let new_value = (*transform_rtl)(new_value);
if left.with_untracked(|left| left != &new_value) {
left.update(|left| *left = new_value);
}
},
immediate,
));
}
move || {
if let Some(stop_watch_left) = &stop_watch_left {
stop_watch_left();
}
if let Some(stop_watch_right) = &stop_watch_right {
stop_watch_right();
}
}
}
/// Direction of syncing.
pub enum SyncDirection {
LeftToRight,
RightToLeft,
Both,
}
/// Options for [`sync_signal_with_options`].
#[derive(DefaultBuilder)]
pub struct SyncSignalOptions<L, R> {
/// If `true`, the signals will be immediately synced when this function is called.
/// If `false`, a signal is only updated when the other signal's value changes.
/// Defaults to `true`.
immediate: bool,
/// Direction of syncing. Defaults to `SyncDirection::Both`.
direction: SyncDirection,
/// Transforms the left signal into the right signal.
/// Defaults to identity.
#[builder(skip)]
transform_ltr: Rc<dyn Fn(&L) -> R>,
/// Transforms the right signal into the left signal.
/// Defaults to identity.
#[builder(skip)]
transform_rtl: Rc<dyn Fn(&R) -> L>,
}
impl<L, R> SyncSignalOptions<L, R> {
/// Transforms the left signal into the right signal.
/// Defaults to identity.
pub fn transform_ltr(self, transform_ltr: impl Fn(&L) -> R + 'static) -> Self {
Self {
transform_ltr: Rc::new(transform_ltr),
..self
}
}
/// Transforms the right signal into the left signal.
/// Defaults to identity.
pub fn transform_rtl(self, transform_rtl: impl Fn(&R) -> L + 'static) -> Self {
Self {
transform_rtl: Rc::new(transform_rtl),
..self
}
}
}
impl<T: Clone> Default for SyncSignalOptions<T, T> {
fn default() -> Self {
Self {
immediate: true,
direction: SyncDirection::Both,
transform_ltr: Rc::new(|x| x.clone()),
transform_rtl: Rc::new(|x| x.clone()),
}
}
}