use std::cell::RefCell;
use std::sync::Arc;
use crux_core::{App, Core};
use leptos::prelude::*;
use mobiler_core::{
Action, BoxAlign, ButtonStyle, CardStyle, Corner, Density, Effect, FontFamily, Icon, ImageRatio,
ImageShape, InputValue, PluginCall, PluginNotify, PluginResponse, ProjectColor, Spacing,
TextStyle, Theme, Tone, Widget,
};
use wasm_bindgen_futures::spawn_local;
const STYLE: &str = include_str!("mobiler.css");
type Dispatch = Arc<dyn Fn(Action) + Send + Sync>;
pub trait WebApp:
App<Event = Action, ViewModel = Widget, Effect = Effect> + Default + Send + Sync + 'static
where
Self::Model: Default + Send + Sync,
{
}
impl<T> WebApp for T
where
T: App<Event = Action, ViewModel = Widget, Effect = Effect> + Default + Send + Sync + 'static,
T::Model: Default + Send + Sync,
{
}
pub fn run<A: WebApp>()
where
A::Model: Default + Send + Sync,
{
console_error_panic_hook::set_once();
inject_default_style();
leptos::mount::mount_to_body(shell::<A>);
}
fn inject_default_style() {
let document = leptos::prelude::document();
let Some(head) = document.head() else { return };
let Ok(style) = document.create_element("style") else { return };
let _ = style.set_attribute("data-mobiler", "shell");
style.set_text_content(Some(STYLE));
let _ = head.insert_before(&style, head.first_child().as_ref());
}
fn shell<A: WebApp>() -> impl IntoView
where
A::Model: Default + Send + Sync,
{
let core = Arc::new(Core::<A>::new());
let (view, set_view) = signal(core.view());
let send: Dispatch = {
let core = core.clone();
Arc::new(move |action: Action| {
let effects = core.process_event(action);
drive(&core, set_view, effects);
})
};
let saved = local_storage().and_then(|s| s.get_item(STORAGE_KEY).ok().flatten()).unwrap_or_default();
if !saved.is_empty() {
send(Action::Restore { data: saved });
}
send(Action::Start);
let send_for_view = send.clone();
view! {
<div class="app">
{move || render(&view.get(), &send_for_view)}
</div>
}
}
fn drive<A: WebApp>(core: &Arc<Core<A>>, set_view: WriteSignal<Widget>, effects: Vec<Effect>)
where
A::Model: Default + Send + Sync,
{
for effect in effects {
match effect {
Effect::Render(_) => set_view.set(core.view()),
Effect::PluginNotify(notify) => perform_notify(¬ify.operation),
Effect::Plugin(mut request) => {
let core = core.clone();
spawn_local(async move {
let response = perform(&request.operation).await;
if let Ok(next) = core.resolve(&mut request, response) {
drive(&core, set_view, next);
}
});
}
}
}
}
async fn perform(call: &PluginCall) -> PluginResponse {
if call.plugin == "device" {
let ua = web_sys::window()
.and_then(|w| w.navigator().user_agent().ok())
.unwrap_or_default();
return PluginResponse { ok: true, output: ua };
}
if call.plugin == "photo" && call.op == "pick" {
return take_image(false).await;
}
if call.plugin == "camera" && call.op == "capture" {
return take_image(true).await;
}
if call.plugin == "datetime" {
return match call.op.as_str() {
"date" => take_datetime("date").await,
"time" => take_datetime("time").await,
other => PluginResponse { ok: false, output: format!("unknown datetime op '{other}'") },
};
}
if call.plugin == "dialog" && call.op == "confirm" {
let v: serde_json::Value = serde_json::from_str(&call.input).unwrap_or(serde_json::Value::Null);
let title = v.get("title").and_then(serde_json::Value::as_str).unwrap_or("");
let message = v.get("message").and_then(serde_json::Value::as_str).unwrap_or("");
let prompt = if title.is_empty() { message.to_string() } else { format!("{title}\n\n{message}") };
let ok = web_sys::window()
.and_then(|w| w.confirm_with_message(&prompt).ok())
.unwrap_or(false);
return PluginResponse { ok, output: if ok { "ok".into() } else { "cancel".into() } };
}
if call.plugin != "http" {
return PluginResponse { ok: false, output: format!("plugin '{}' not available", call.plugin) };
}
let v: serde_json::Value = serde_json::from_str(&call.input).unwrap_or(serde_json::Value::Null);
let url = v.get("url").and_then(serde_json::Value::as_str).unwrap_or("");
let body = v.get("body").and_then(serde_json::Value::as_str);
use gloo_net::http::Request;
let builder = match call.op.as_str() {
"POST" => Request::post(url),
"PATCH" => Request::patch(url),
"DELETE" => Request::delete(url),
_ => Request::get(url),
};
let request = match body {
Some(b) => builder.header("Content-Type", "application/json").body(b),
None => builder.build(),
};
let request = match request {
Ok(r) => r,
Err(e) => return PluginResponse { ok: false, output: e.to_string() },
};
match request.send().await {
Ok(resp) => PluginResponse { ok: resp.ok(), output: resp.text().await.unwrap_or_default() },
Err(e) => PluginResponse { ok: false, output: e.to_string() },
}
}
async fn take_image(capture: bool) -> PluginResponse {
use wasm_bindgen::{closure::Closure, JsCast};
let Some(doc) = web_sys::window().and_then(|w| w.document()) else {
return PluginResponse { ok: false, output: "no document".into() };
};
let Some(input) = doc.create_element("input").ok().and_then(|e| e.dyn_into::<web_sys::HtmlInputElement>().ok()) else {
return PluginResponse { ok: false, output: "no input element".into() };
};
input.set_type("file");
input.set_accept("image/*");
if capture {
let _ = input.set_attribute("capture", "environment");
}
let (tx, rx) = futures_channel::oneshot::channel::<Option<String>>();
let tx = std::cell::RefCell::new(Some(tx));
let input_for_cb = input.clone();
let on_change = Closure::wrap(Box::new(move || {
let url = input_for_cb
.files()
.and_then(|files| files.get(0))
.and_then(|file| web_sys::Url::create_object_url_with_blob(&file).ok());
if let Some(tx) = tx.borrow_mut().take() {
let _ = tx.send(url);
}
}) as Box<dyn FnMut()>);
input.set_onchange(Some(on_change.as_ref().unchecked_ref()));
input.click();
on_change.forget();
match rx.await {
Ok(Some(url)) => PluginResponse { ok: true, output: url },
_ => PluginResponse { ok: false, output: "cancelled".into() },
}
}
async fn take_datetime(kind: &str) -> PluginResponse {
use wasm_bindgen::{closure::Closure, JsCast};
let Some(doc) = web_sys::window().and_then(|w| w.document()) else {
return PluginResponse { ok: false, output: "no document".into() };
};
let Some(input) = doc.create_element("input").ok().and_then(|e| e.dyn_into::<web_sys::HtmlInputElement>().ok()) else {
return PluginResponse { ok: false, output: "no input element".into() };
};
input.set_type(kind); let _ = input.set_attribute("style", "position:fixed;left:-9999px;opacity:0");
if let Some(body) = doc.body() {
let _ = body.append_child(&input);
}
let (tx, rx) = futures_channel::oneshot::channel::<Option<String>>();
let tx = std::rc::Rc::new(std::cell::RefCell::new(Some(tx)));
let input_for_change = input.clone();
let tx_change = tx.clone();
let on_change = Closure::wrap(Box::new(move || {
let v = input_for_change.value();
if let Some(tx) = tx_change.borrow_mut().take() {
let _ = tx.send(if v.is_empty() { None } else { Some(v) });
}
}) as Box<dyn FnMut()>);
let tx_cancel = tx.clone();
let on_cancel = Closure::wrap(Box::new(move || {
if let Some(tx) = tx_cancel.borrow_mut().take() {
let _ = tx.send(None);
}
}) as Box<dyn FnMut()>);
let _ = input.add_event_listener_with_callback("change", on_change.as_ref().unchecked_ref());
let _ = input.add_event_listener_with_callback("cancel", on_cancel.as_ref().unchecked_ref());
if input.show_picker().is_err() {
input.click(); }
on_change.forget(); on_cancel.forget();
let result = rx.await;
input.remove();
match result {
Ok(Some(v)) => PluginResponse { ok: true, output: v },
_ => PluginResponse { ok: false, output: "cancelled".into() },
}
}
const STORAGE_KEY: &str = "mobiler.state";
fn local_storage() -> Option<web_sys::Storage> {
web_sys::window()?.local_storage().ok().flatten()
}
fn perform_notify(notify: &PluginNotify) {
let win = match web_sys::window() {
Some(w) => w,
None => return,
};
match (notify.plugin.as_str(), notify.op.as_str()) {
("storage", "save") => {
if let Some(s) = local_storage() {
let _ = s.set_item(STORAGE_KEY, ¬ify.input);
}
}
("clipboard", "copy") => {
let _ = win.navigator().clipboard().write_text(¬ify.input);
}
("browser", "open") => {
let _ = win.open_with_url_and_target(¬ify.input, "_blank");
}
("share", _) => {
let _ = win.navigator().clipboard().write_text(¬ify.input);
}
("toast", _) => show_toast(¬ify.input),
("haptics", style) => {
let ms = match style {
"light" => 15,
"heavy" => 50,
_ => 30, };
let _ = win.navigator().vibrate_with_duration(ms);
}
_ => {} }
}
fn show_toast(text: &str) {
let Some(doc) = web_sys::window().and_then(|w| w.document()) else { return };
let (Ok(el), Some(body)) = (doc.create_element("div"), doc.body()) else { return };
el.set_class_name("toast");
el.set_text_content(Some(text));
let _ = body.append_child(&el);
gloo_timers::callback::Timeout::new(2600, move || el.remove()).forget();
}
fn render(widget: &Widget, send: &Dispatch) -> AnyView {
match widget {
Widget::Text { content, style } => {
let (class, content) = (text_class(*style), content.clone());
view! { <p class=class>{content}</p> }.into_any()
}
Widget::Image { source, shape, ratio } => {
let (class, source) = (image_class(*shape, *ratio), source.clone());
view! { <img class=class src=source /> }.into_any()
}
Widget::Badge { label, tone } => {
let (class, label) = (format!("badge {}", tone_class(*tone)), label.clone());
view! { <span class=class>{label}</span> }.into_any()
}
Widget::ColorDot { color } => {
view! { <span class=format!("dot {}", dot_class(*color))></span> }.into_any()
}
Widget::Avatar { source, status } => {
let dot = status.map(|t| view! { <span class=format!("avatar-status {}", tone_class(t))></span> });
view! {
<span class="avatar">
<img class="avatar-img" src=source.clone() />
{dot}
</span>
}
.into_any()
}
Widget::Rating { value, max, on_rate } => {
let value = *value;
let stars: Vec<AnyView> = (1..=*max)
.map(|i| {
let threshold = u32::from(i) * 10;
let glyph = if value >= threshold { "★" } else if value + 5 >= threshold { "⯨" } else { "☆" };
match on_rate {
Some(tokens) => {
let (send, token) = (send.clone(), tokens.get(usize::from(i - 1)).cloned().unwrap_or_default());
view! {
<button class="star star-tappable" on:click=move |_| send(Action::Fired { token: token.clone() })>
{glyph}
</button>
}
.into_any()
}
None => view! { <span class="star">{glyph}</span> }.into_any(),
}
})
.collect();
view! { <span class="rating">{stars}</span> }.into_any()
}
Widget::Divider => view! { <hr class="divider" /> }.into_any(),
Widget::Spacer { size } => {
view! { <div class=format!("spacer {}", spacer_class(*size))></div> }.into_any()
}
Widget::Row { children } => {
let kids = render_all(children, send);
view! { <div class="row">{kids}</div> }.into_any()
}
Widget::Column { children } => {
let kids = render_all(children, send);
view! { <div class="col">{kids}</div> }.into_any()
}
Widget::Card { child, style, on_press } => {
let class = format!("card {}", card_class(*style));
let body = render(child, send);
match on_press {
Some(token) => {
let (send, token) = (send.clone(), token.clone());
view! {
<button
class=format!("{class} card-tappable")
on:click=move |_| send(Action::Fired { token: token.clone() })
>
{body}
</button>
}
.into_any()
}
None => view! { <div class=class>{body}</div> }.into_any(),
}
}
Widget::Box { children, align, scrim } => {
let acls = align_class(*align);
if *scrim && children.len() > 1 {
let bg = render(&children[0], send);
let content = render_all(&children[1..], send);
view! {
<div class=format!("box box-scrim {acls}")>
{bg}
<div class="scrim"></div>
<div class="box-content">{content}</div>
</div>
}
.into_any()
} else {
let kids = render_all(children, send);
view! { <div class=format!("box {acls}")>{kids}</div> }.into_any()
}
}
Widget::Grid { children } => {
let kids = render_all(children, send);
view! { <div class="grid">{kids}</div> }.into_any()
}
Widget::Scroller { children } => {
let kids = render_all(children, send);
view! { <div class="scroller">{kids}</div> }.into_any()
}
Widget::Button { label, style, on_press } => {
let (send, token, label) = (send.clone(), on_press.clone(), label.clone());
let class = format!("btn {}", button_class(*style));
view! {
<button class=class on:click=move |_| send(Action::Fired { token: token.clone() })>
{label}
</button>
}
.into_any()
}
Widget::IconButton { icon, on_press } => {
let (send, token) = (send.clone(), on_press.clone());
let glyph = icon_glyph(*icon);
view! {
<button class="iconbtn" on:click=move |_| send(Action::Fired { token: token.clone() })>
{glyph}
</button>
}
.into_any()
}
Widget::Chip { label, selected, on_press } => {
let (send, token, label) = (send.clone(), on_press.clone(), label.clone());
let class = if *selected { "chip selected" } else { "chip" };
view! {
<button class=class on:click=move |_| send(Action::Fired { token: token.clone() })>
{label}
</button>
}
.into_any()
}
Widget::TextField { id, placeholder, value } => {
let (send, id) = (send.clone(), id.clone());
let (placeholder, value) = (placeholder.clone(), value.clone());
view! {
<input
class="field"
placeholder=placeholder
prop:value=value
on:input=move |ev| send(Action::Input {
id: id.clone(),
value: InputValue::Text(event_target_value(&ev)),
})
/>
}
.into_any()
}
Widget::SearchField { id, placeholder, value } => {
let (send, id) = (send.clone(), id.clone());
let (placeholder, value) = (placeholder.clone(), value.clone());
view! {
<div class="searchfield">
<span class="search-icon">{icon_glyph(Icon::Search)}</span>
<input
class="search-input"
placeholder=placeholder
prop:value=value
on:input=move |ev| send(Action::Input {
id: id.clone(),
value: InputValue::Text(event_target_value(&ev)),
})
/>
</div>
}
.into_any()
}
Widget::Segmented { segments } => {
let segs: Vec<AnyView> = segments
.iter()
.map(|s| {
let (send, token) = (send.clone(), s.on_select.clone());
let class = if s.selected { "segment selected" } else { "segment" };
let label = s.label.clone();
view! {
<button class=class on:click=move |_| send(Action::Fired { token: token.clone() })>
{label}
</button>
}
.into_any()
})
.collect();
view! { <div class="segmented">{segs}</div> }.into_any()
}
Widget::Toggle { id, label, value } => {
let (send, id, label, checked) = (send.clone(), id.clone(), label.clone(), *value);
view! {
<label class="toggle">
{label}
<input
type="checkbox"
role="switch"
prop:checked=checked
on:change=move |ev| send(Action::Input {
id: id.clone(),
value: InputValue::Bool(event_target_checked(&ev)),
})
/>
</label>
}
.into_any()
}
Widget::Checkbox { id, label, value } => {
let (send, id, label, checked) = (send.clone(), id.clone(), label.clone(), *value);
view! {
<label class="check">
<input
type="checkbox"
prop:checked=checked
on:change=move |ev| send(Action::Input {
id: id.clone(),
value: InputValue::Bool(event_target_checked(&ev)),
})
/>
{label}
</label>
}
.into_any()
}
Widget::Slider { id, value, max } => {
let (send, id, value, max) = (send.clone(), id.clone(), *value, *max);
view! {
<input
class="slider"
type="range"
min="0"
max=max
prop:value=value
on:input=move |ev| send(Action::Input {
id: id.clone(),
value: InputValue::Int(event_target_value(&ev).parse().unwrap_or(0)),
})
/>
}
.into_any()
}
Widget::Stepper { value, on_decrement, on_increment } => {
let send_dec = send.clone();
let send_inc = send.clone();
let (dec, inc) = (on_decrement.clone(), on_increment.clone());
view! {
<div class="stepper">
<button on:click=move |_| send_dec(Action::Fired { token: dec.clone() })>"−"</button>
<span class="stepper-value">{*value}</span>
<button on:click=move |_| send_inc(Action::Fired { token: inc.clone() })>"+"</button>
</div>
}
.into_any()
}
Widget::Scaffold { title, body, tabs, back, dark_mode, theme, fab, sheet, route, depth } => {
let back_btn = back.clone().map(|token| {
let send = send.clone();
view! {
<button class="back" on:click=move |_| send(Action::Fired { token: token.clone() })>
"‹"
</button>
}
});
let tabbar = (!tabs.is_empty()).then(|| {
let tabs: Vec<AnyView> = tabs
.iter()
.map(|tab| {
let (send, token) = (send.clone(), tab.on_select.clone());
let class = if tab.selected { "tab selected" } else { "tab" };
let label = tab.label.clone();
let icon = tab.icon.map(|i| view! { <span class="tab-icon">{icon_glyph(i)}</span> });
view! {
<button class=class on:click=move |_| send(Action::Fired { token: token.clone() })>
{icon}
<span class="tab-label">{label}</span>
</button>
}
.into_any()
})
.collect();
view! { <div class="tabbar">{tabs}</div> }
});
let fab_btn = fab.clone().map(|f| {
let (send, token) = (send.clone(), f.on_press.clone());
view! {
<button class="fab" on:click=move |_| send(Action::Fired { token: token.clone() })>
{icon_glyph(f.icon)}
</button>
}
});
let sheet_overlay = sheet.as_ref().map(|s| {
let (send_scrim, dismiss) = (send.clone(), s.on_dismiss.clone());
let (title, child) = (s.title.clone(), render(&s.child, send));
view! {
<div class="sheet-scrim" on:click=move |_| send_scrim(Action::Fired { token: dismiss.clone() })></div>
<div class="sheet">
<div class="sheet-handle"></div>
<div class="sheet-title">{title}</div>
{child}
</div>
}
});
let class = if *dark_mode { "scaffold theme-dark" } else { "scaffold" };
let body_class = format!("scaffold-body {}", nav_class(route, *depth));
let theme_style = theme.as_ref().map(theme_css).unwrap_or_default();
let (title, body) = (title.clone(), render(body, send));
view! {
<div class=class style=theme_style>
<div class="topbar">
{back_btn}
<span class="title">{title}</span>
</div>
<div class=body_class data-route=route.clone()>{body}</div>
{fab_btn}
{tabbar}
{sheet_overlay}
</div>
}
.into_any()
}
}
}
fn render_all(children: &[Widget], send: &Dispatch) -> Vec<AnyView> {
children.iter().map(|c| render(c, send)).collect()
}
thread_local! {
static NAV: RefCell<(String, u32, bool)> = const { RefCell::new((String::new(), 0, false)) };
}
fn theme_css(t: &Theme) -> String {
let (r, g, b) = (t.seed.r, t.seed.g, t.seed.b);
let radius = match t.corner {
Corner::None => "0px",
Corner::Small => "8px",
Corner::Medium => "14px",
Corner::Large => "22px",
};
let (gap, pad) = match t.density {
Density::Compact => ("8px", "10px"),
Density::Comfortable => ("12px", "14px"),
};
let font = match t.font {
FontFamily::System => "system-ui, -apple-system, \"Segoe UI\", Roboto, sans-serif",
FontFamily::Rounded => "ui-rounded, \"SF Pro Rounded\", \"Segoe UI\", system-ui, sans-serif",
FontFamily::Serif => "ui-serif, Georgia, \"Times New Roman\", serif",
FontFamily::Monospace => "ui-monospace, \"SF Mono\", \"Cascadia Code\", Menlo, monospace",
};
let (ar, ag, ab) = t.accent.map_or((r, g, b), |a| (a.r, a.g, a.b));
format!(
"--primary:rgb({r},{g},{b});--accent:rgb({r},{g},{b});\
--accent2:rgb({ar},{ag},{ab});\
--accent-soft:rgba({r},{g},{b},0.16);--radius:{radius};\
--gap:{gap};--pad:{pad};--font:{font};"
)
}
fn nav_class(route: &str, depth: u32) -> &'static str {
NAV.with_borrow_mut(|(prev_route, prev_depth, toggle)| {
if route == prev_route {
return "";
}
let dir = if depth > *prev_depth {
["nav-push-a", "nav-push-b"]
} else if depth < *prev_depth {
["nav-pop-a", "nav-pop-b"]
} else {
["nav-fade-a", "nav-fade-b"]
};
*toggle = !*toggle;
*prev_route = route.to_string();
*prev_depth = depth;
dir[usize::from(*toggle)]
})
}
fn text_class(s: TextStyle) -> &'static str {
match s {
TextStyle::Title => "t-title",
TextStyle::Subtitle => "t-subtitle",
TextStyle::Caption => "t-caption",
TextStyle::Emphasis => "t-emphasis",
TextStyle::Body => "t-body",
}
}
fn button_class(s: ButtonStyle) -> &'static str {
match s {
ButtonStyle::Filled => "btn-filled",
ButtonStyle::Outlined => "btn-outlined",
ButtonStyle::Text => "btn-text",
}
}
fn card_class(s: CardStyle) -> &'static str {
match s {
CardStyle::Elevated => "card-elevated",
CardStyle::Outlined => "card-outlined",
CardStyle::Filled => "card-filled",
CardStyle::Brand => "card-brand",
}
}
fn tone_class(t: Tone) -> &'static str {
match t {
Tone::Neutral => "tone-neutral",
Tone::Success => "tone-success",
Tone::Warning => "tone-warning",
Tone::Danger => "tone-danger",
Tone::Info => "tone-info",
}
}
fn spacer_class(s: Spacing) -> &'static str {
match s {
Spacing::Xs => "sp-xs",
Spacing::Sm => "sp-sm",
Spacing::Md => "sp-md",
Spacing::Lg => "sp-lg",
Spacing::Xl => "sp-xl",
}
}
fn icon_glyph(i: Icon) -> &'static str {
match i {
Icon::Delete => "🗑",
Icon::Add => "＋",
Icon::Edit => "✏️",
Icon::Close => "✕",
Icon::Settings => "⚙",
Icon::Check => "✓",
Icon::Star => "★",
Icon::Info => "ℹ",
Icon::Home => "⌂",
Icon::Search => "🔍",
Icon::Menu => "☰",
Icon::Filter => "⚟",
Icon::Back => "‹",
Icon::Forward => "›",
Icon::Down => "⌄",
Icon::Bell => "🔔",
Icon::Cart => "🛒",
Icon::Share => "↗",
Icon::Heart => "♡",
Icon::HeartFilled => "♥",
Icon::Person => "👤",
Icon::People => "👥",
Icon::Phone => "📞",
Icon::Mail => "✉",
Icon::Calendar => "📅",
Icon::Clock => "🕑",
Icon::MapPin => "📍",
Icon::Camera => "📷",
Icon::Photo => "🖼",
Icon::Play => "▶",
Icon::Scissors => "✂",
}
}
fn image_class(shape: ImageShape, ratio: ImageRatio) -> String {
let shape = match shape {
ImageShape::Square => "img-square",
ImageShape::Rounded => "img-rounded",
ImageShape::Circle => "img-circle",
};
let ratio = match ratio {
ImageRatio::Wide => "ratio-wide",
ImageRatio::Square => "ratio-square",
ImageRatio::Tall => "ratio-tall",
};
format!("img {shape} {ratio}")
}
fn dot_class(c: ProjectColor) -> &'static str {
match c {
ProjectColor::Indigo => "dot-indigo",
ProjectColor::Teal => "dot-teal",
ProjectColor::Coral => "dot-coral",
ProjectColor::Amber => "dot-amber",
ProjectColor::Lime => "dot-lime",
ProjectColor::Pink => "dot-pink",
}
}
fn align_class(a: BoxAlign) -> &'static str {
match a {
BoxAlign::TopStart => "align-top-start",
BoxAlign::TopEnd => "align-top-end",
BoxAlign::Center => "align-center",
BoxAlign::BottomStart => "align-bottom-start",
BoxAlign::BottomCenter => "align-bottom-center",
BoxAlign::BottomEnd => "align-bottom-end",
}
}