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use eframe::wasm_bindgen::{self, prelude::*};
use std::sync::Arc;
use re_error::ResultExt as _;
use re_memory::AccountingAllocator;
#[global_allocator]
static GLOBAL: AccountingAllocator<std::alloc::System> =
AccountingAllocator::new(std::alloc::System);
#[wasm_bindgen]
pub struct WebHandle {
runner: eframe::WebRunner,
}
#[wasm_bindgen]
impl WebHandle {
#[allow(clippy::new_without_default)]
#[wasm_bindgen(constructor)]
pub fn new() -> Self {
re_log::setup_web_logging();
Self {
runner: eframe::WebRunner::new(),
}
}
/// The `url` is an optional URL to either an .rrd file over http, or a Rerun WebSocket server.
#[wasm_bindgen]
pub async fn start(
&self,
canvas_id: &str,
url: Option<String>,
) -> Result<(), wasm_bindgen::JsValue> {
let web_options = eframe::WebOptions {
follow_system_theme: false,
default_theme: eframe::Theme::Dark,
wgpu_options: crate::wgpu_options(),
depth_buffer: 0,
};
self.runner
.start(
canvas_id,
web_options,
Box::new(move |cc| {
let build_info = re_build_info::build_info!();
let app_env = crate::AppEnvironment::Web;
let persist_state = get_persist_state(&cc.integration_info);
let startup_options = crate::StartupOptions {
memory_limit: re_memory::MemoryLimit {
// On wasm32 we only have 4GB of memory to play around with.
limit: Some(2_500_000_000),
},
persist_state,
};
let re_ui = crate::customize_eframe(cc);
let url = url.unwrap_or_else(|| get_url(&cc.integration_info));
match categorize_uri(url) {
EndpointCategory::HttpRrd(url) => {
// Download an .rrd file over http:
let (tx, rx) = re_smart_channel::smart_channel(
re_smart_channel::SmartMessageSource::RrdHttpStream {
url: url.clone(),
},
re_smart_channel::SmartChannelSource::RrdHttpStream {
url: url.clone(),
},
);
re_log_encoding::stream_rrd_from_http::stream_rrd_from_http(
url,
Arc::new({
let egui_ctx = cc.egui_ctx.clone();
move |msg| {
egui_ctx.request_repaint(); // wake up ui thread
use re_log_encoding::stream_rrd_from_http::HttpMessage;
match msg {
HttpMessage::LogMsg(msg) => tx
.send(msg)
.warn_on_err_once("failed to send message"),
HttpMessage::Success => tx
.quit(None)
.warn_on_err_once("failed to send quit marker"),
HttpMessage::Failure(err) => tx
.quit(Some(err))
.warn_on_err_once("failed to send quit marker"),
};
}
}),
);
Box::new(crate::App::from_receiver(
build_info,
&app_env,
startup_options,
re_ui,
cc.storage,
rx,
))
}
EndpointCategory::WebEventListener => {
// Process an rrd when it's posted via `window.postMessage`
let (tx, rx) = re_smart_channel::smart_channel(
re_smart_channel::SmartMessageSource::RrdWebEventCallback,
re_smart_channel::SmartChannelSource::RrdWebEventListener,
);
re_log_encoding::stream_rrd_from_http::stream_rrd_from_event_listener(
Arc::new({
let egui_ctx = cc.egui_ctx.clone();
move |msg| {
egui_ctx.request_repaint(); // wake up ui thread
use re_log_encoding::stream_rrd_from_http::HttpMessage;
match msg {
HttpMessage::LogMsg(msg) => tx
.send(msg)
.warn_on_err_once("failed to send message"),
HttpMessage::Success => tx
.quit(None)
.warn_on_err_once("failed to send quit marker"),
HttpMessage::Failure(err) => tx
.quit(Some(err))
.warn_on_err_once("failed to send quit marker"),
};
}
}),
);
Box::new(crate::App::from_receiver(
build_info,
&app_env,
startup_options,
re_ui,
cc.storage,
rx,
))
}
EndpointCategory::WebSocket(url) => {
// Connect to a Rerun server over WebSockets.
Box::new(crate::RemoteViewerApp::new(
build_info,
app_env,
startup_options,
re_ui,
cc.storage,
url,
))
}
}
}),
)
.await?;
re_log::debug!("Web app started.");
Ok(())
}
#[wasm_bindgen]
pub fn destroy(&self) {
self.runner.destroy();
}
#[wasm_bindgen]
pub fn has_panicked(&self) -> bool {
self.runner.panic_summary().is_some()
}
#[wasm_bindgen]
pub fn panic_message(&self) -> Option<String> {
self.runner.panic_summary().map(|s| s.message())
}
#[wasm_bindgen]
pub fn panic_callstack(&self) -> Option<String> {
self.runner.panic_summary().map(|s| s.callstack())
}
}
#[wasm_bindgen]
pub fn is_webgpu_build() -> bool {
!cfg!(feature = "webgl")
}
enum EndpointCategory {
/// Could be a local path (`/foo.rrd`) or a remote url (`http://foo.com/bar.rrd`).
HttpRrd(String),
/// A remote Rerun server.
WebSocket(String),
/// An eventListener for rrd posted from containing html
WebEventListener,
}
fn categorize_uri(mut uri: String) -> EndpointCategory {
if uri.starts_with("http") || uri.ends_with(".rrd") {
EndpointCategory::HttpRrd(uri)
} else if uri.starts_with("ws:") || uri.starts_with("wss:") {
EndpointCategory::WebSocket(uri)
} else if uri.starts_with("web_event:") {
EndpointCategory::WebEventListener
} else {
// If this is sometyhing like `foo.com` we can't know what it is until we connect to it.
// We could/should connect and see what it is, but for now we just take a wild guess instead:
re_log::info!("Assuming WebSocket endpoint");
if !uri.contains("://") {
uri = format!("{}://{uri}", re_ws_comms::PROTOCOL);
}
EndpointCategory::WebSocket(uri)
}
}
fn get_url(info: &eframe::IntegrationInfo) -> String {
let mut url = String::new();
if let Some(param) = info.web_info.location.query_map.get("url") {
url = param.clone();
}
if url.is_empty() {
format!(
"{}://{}:{}",
re_ws_comms::PROTOCOL,
&info.web_info.location.hostname,
re_ws_comms::DEFAULT_WS_SERVER_PORT
)
} else {
url
}
}
fn get_persist_state(info: &eframe::IntegrationInfo) -> bool {
match info
.web_info
.location
.query_map
.get("persist")
.map(String::as_str)
{
Some("0") => false,
Some("1") => true,
Some(other) => {
re_log::warn!(
"Unexpected value for 'persist' query: {other:?}. Expected either '0' or '1'. Defaulting to '1'."
);
true
}
_ => true,
}
}