97 lines
2.8 KiB
Rust
97 lines
2.8 KiB
Rust
#![doc = include_str!("../README.md")]
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// `macro_use` puts the log macros (`error!`, `warn!`, `debug!`, `info!` and `trace!`) in scope for the crate
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#[macro_use]
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extern crate log;
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pub mod editor_api;
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pub mod helpers;
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use editor::messages::prelude::*;
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use std::cell::RefCell;
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use std::collections::HashMap;
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use std::panic;
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use std::sync::atomic::{AtomicBool, Ordering};
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use wasm_bindgen::prelude::*;
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// Set up the persistent editor backend state
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pub static EDITOR_HAS_CRASHED: AtomicBool = AtomicBool::new(false);
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pub static LOGGER: WasmLog = WasmLog;
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thread_local! {
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// TODO: Remove the concept of multiple editor instances to simplify all of this
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pub static EDITOR_INSTANCES: RefCell<HashMap<u64, editor::application::Editor>> = RefCell::new(HashMap::new());
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pub static JS_EDITOR_HANDLES: RefCell<HashMap<u64, editor_api::JsEditorHandle>> = RefCell::new(HashMap::new());
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}
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/// Initialize the backend
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#[wasm_bindgen(start)]
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pub fn init_graphite() {
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// Set up the panic hook
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panic::set_hook(Box::new(panic_hook));
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// Set up the logger with a default level of debug
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log::set_logger(&LOGGER).expect("Failed to set logger");
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log::set_max_level(log::LevelFilter::Debug);
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}
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/// When a panic occurs, notify the user and log the error to the JS console before the backend dies
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pub fn panic_hook(info: &panic::PanicInfo) {
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EDITOR_HAS_CRASHED.store(true, Ordering::SeqCst);
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error!("{info}");
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JS_EDITOR_HANDLES.with(|instances| {
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instances
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.borrow_mut()
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.values_mut()
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.for_each(|instance| instance.send_frontend_message_to_js_rust_proxy(FrontendMessage::DisplayDialogPanic { panic_info: info.to_string() }))
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});
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}
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/// The JavaScript `Error` type
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#[wasm_bindgen]
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extern "C" {
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#[derive(Clone, Debug)]
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pub type Error;
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#[wasm_bindgen(constructor)]
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pub fn new(msg: &str) -> Error;
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}
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/// Logging to the JS console
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#[wasm_bindgen]
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extern "C" {
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#[wasm_bindgen(js_namespace = console)]
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fn log(msg: &str, format: &str);
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#[wasm_bindgen(js_namespace = console)]
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fn info(msg: &str, format: &str);
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#[wasm_bindgen(js_namespace = console)]
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fn warn(msg: &str, format: &str);
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#[wasm_bindgen(js_namespace = console)]
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fn error(msg: &str, format: &str);
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}
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#[derive(Default)]
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pub struct WasmLog;
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impl log::Log for WasmLog {
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fn enabled(&self, metadata: &log::Metadata) -> bool {
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metadata.level() <= log::Level::Info
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}
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fn log(&self, record: &log::Record) {
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let (log, name, color): (fn(&str, &str), &str, &str) = match record.level() {
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log::Level::Trace => (log, "trace", "color:plum"),
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log::Level::Debug => (log, "debug", "color:cyan"),
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log::Level::Warn => (warn, "warn", "color:goldenrod"),
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log::Level::Info => (info, "info", "color:mediumseagreen"),
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log::Level::Error => (error, "error", "color:red"),
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};
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let msg = &format!("%c{}\t{}", name, record.args());
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log(msg, color)
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}
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fn flush(&self) {}
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}
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