virtual_node/event/
non_delegated_event_wrapper.rs

1use crate::event::virtual_events::ElementEventsId;
2use crate::event::{EventHandler, EventName, MouseEvent, VirtualEvents, ELEMENT_EVENTS_ID_PROP};
3use js_sys::Reflect;
4use std::rc::Rc;
5use wasm_bindgen::closure::Closure;
6use wasm_bindgen::JsCast;
7
8/// Attaches an event handler directly onto a DOM element.
9///
10/// See [`VirtualEvents`] and [`EventName::is_delegated`] for documentation regarding event delegation.
11pub fn insert_non_delegated_event(
12    element: &web_sys::Element,
13    onevent: &EventName,
14    callback: &EventHandler,
15    events_id: ElementEventsId,
16    events: &VirtualEvents,
17) {
18    let events_clone = events.clone();
19
20    let event_name = onevent.without_on_prefix();
21
22    let on_event = onevent.with_on_prefix().to_string();
23    let on_event_clone = on_event.clone();
24
25    let callback_wrapper = move |event: web_sys::Event| {
26        let this_elem = event.current_target().unwrap();
27
28        let events_id = Reflect::get(&this_elem, &ELEMENT_EVENTS_ID_PROP.into()).unwrap();
29        let events_id = events_id.as_string();
30        let events_id = events_id.unwrap();
31
32        let events_id =
33            events_id.trim_start_matches(&events_clone.events_id_props_prefix().to_string());
34        let events_id: u32 = events_id.parse().unwrap();
35
36        let event_name = EventName::new(on_event_clone.clone().into());
37        let cb = events_clone
38            .get_event_handler(&ElementEventsId::new(events_id), &event_name)
39            .unwrap();
40
41        match cb {
42            EventHandler::NoArgs(no_args) => (no_args.borrow_mut())(),
43            EventHandler::MouseEvent(mouse) => {
44                (mouse.borrow_mut())(MouseEvent::new(event.dyn_into().unwrap()));
45            }
46            EventHandler::UnsupportedSignature(cb) => cb.call(&event),
47        };
48    };
49
50    let callback_wrapper = Box::new(callback_wrapper) as Box<dyn FnMut(_) -> ()>;
51    let callback_wrapper = Closure::wrap(callback_wrapper);
52
53    let current_elem: &web_sys::EventTarget = element.dyn_ref().unwrap();
54    current_elem
55        .add_event_listener_with_callback(
56            event_name,
57            callback_wrapper.as_ref().as_ref().unchecked_ref(),
58        )
59        .unwrap();
60
61    events.insert_event(
62        events_id,
63        onevent.clone(),
64        callback.clone(),
65        Some(Rc::new(callback_wrapper)),
66    );
67}
virtual_node/event/non_delegated_event_wrapper.rs

virtual_node/event/
non_delegated_event_wrapper.rs
