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#![no_std] use js::*; #[macro_use] extern crate alloc; use alloc::string::String; use alloc::sync::Arc; use alloc::vec::Vec; use spin::Mutex; pub type HTMLElement = f64; #[derive(Copy, Clone)] struct Destructable { function: Option<JSFunction>, } pub trait CustomElement { fn new(element: HTMLElement) -> Self where Self: core::marker::Sized + core::marker::Sync + core::marker::Send + 'static; fn register(name: &str) where Self: core::marker::Sized + core::marker::Sync + core::marker::Send + 'static, { let construct = create_callback_1(|element| { let el = Arc::new(Mutex::new(Self::new(element.into()))); let el1 = el.clone(); let el2 = el.clone(); let el3 = el.clone(); let destruct_connect = Arc::new(Mutex::new(Destructable { function: None })); let connect = create_callback_0(move || { el1.lock().connected(); }); destruct_connect.lock().function = Some(connect.into()); let destruct_attribute_change = Arc::new(Mutex::new(Destructable { function: None })); let attribute_change = create_callback_3(move |name_obj, old_obj, new_obj| { let name = cstr_to_string(name_obj as i32); let old = if old_obj == -1.0 { None } else { Some(cstr_to_string(old_obj as i32)) }; let new = if new_obj == -1.0 { None } else { Some(cstr_to_string(new_obj as i32)) }; el3.lock().attribute_changed(name, old, new); }); destruct_attribute_change.lock().function = Some(connect.into()); let destruct_disconnect = Arc::new(Mutex::new(Destructable { function: None })); let destruct_disconnect2 = destruct_disconnect.clone(); let disconnect = create_callback_0(move || { el2.lock().disconnected(); remove_callback(destruct_connect.lock().function.as_ref().unwrap().into()); remove_callback(destruct_disconnect.lock().function.as_ref().unwrap().into()); remove_callback( destruct_attribute_change .lock() .function .as_ref() .unwrap() .into(), ); }); destruct_disconnect2.lock().function = Some(disconnect.into()); lazy_static::lazy_static! { static ref FN: JSFunction= { register_function( r#"function(e,a,b,c){ e.addHooks(a,b,c); }"#, ) };}; FN.invoke_4(element, connect, disconnect, attribute_change); }); let attrs = Self::observed_attributes().join(","); lazy_static::lazy_static! { static ref FN: JSFunction= { register_function( r#"function(construct,elementNamePtr, elementNameLen,attrNamesPtr,attrNamesLen){ const elementName = this.readUtf8FromMemory(elementNamePtr,elementNameLen); const attrNames = this.readUtf8FromMemory(attrNamesPtr,attrNamesLen); let attrs = attrNames.split(","); class GeneratedCustomElement extends HTMLElement { constructor() { super(); construct(this); } static get observedAttributes() { return attrs; } connectedCallback() { self.connect(); } disconnectedCallback() { self.disconnect(); } attributeChangedCallback(attributeName, oldValue, newValue) { self.attributeChange(attributeName,oldValue,newValue) } addHooks(connect,disconnect,attributeChange){ self.connect = connect; self.disconnect = disconnect; self.attributeChange = attributeChange; } } // tell the dom to associate it with an html tag name customElements.define(elementName, GeneratedCustomElement); }"#, ) };}; FN.invoke_5( construct, name.as_ptr() as u32, name.len() as u32, attrs.as_ptr() as u32, attrs.len() as u32, ); } fn observed_attributes() -> Vec<&'static str> { vec![] } fn created(&mut self) {} fn connected(&mut self) {} fn disconnected(&mut self) {} fn attribute_changed( &mut self, _name: String, _old_value: Option<String>, _new_value: Option<String>, ) { } }