web-api-cat 0.7.4

Bindings between boa-cat (JS engine) and the DOM (html-cat tree) plus fetch (net-cat). v0.7.4 ships the `EventTarget` mixin: `addEventListener(type, callback)` queues handlers under a lazy `__listeners__` slot; `removeEventListener` drops them by `Value::PartialEq`; `dispatchEvent(event)` walks the bubble chain via the v0.6.8 `__parent__` backref and invokes each handler through boa-cat 0.7.1's now-public `expression::call_function`. Listener throws are swallowed at the dispatch boundary per DOM spec. Seventh sub-crate of a Servo-replacement webview runtime targeting Tauri.
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46

//! Bridge error type.

use boa_cat::Error as EngineError;
use html_cat::Error as HtmlError;
use net_cat::Error as NetError;

/// All errors `web-api-cat` can produce.
#[derive(Debug, Clone, PartialEq, Eq)]
pub enum Error {
    /// A JS engine error from boa-cat.
    Engine(EngineError),
    /// An HTML-parser error.
    Html(HtmlError),
    /// A network error from net-cat.
    Net(NetError),
}

impl From<EngineError> for Error {
    fn from(value: EngineError) -> Self {
        Self::Engine(value)
    }
}

impl From<HtmlError> for Error {
    fn from(value: HtmlError) -> Self {
        Self::Html(value)
    }
}

impl From<NetError> for Error {
    fn from(value: NetError) -> Self {
        Self::Net(value)
    }
}

impl std::fmt::Display for Error {
    fn fmt(&self, f: &mut std::fmt::Formatter<'_>) -> std::fmt::Result {
        match self {
            Self::Engine(e) => write!(f, "engine error: {e}"),
            Self::Html(e) => write!(f, "html error: {e}"),
            Self::Net(e) => write!(f, "net error: {e}"),
        }
    }
}

impl std::error::Error for Error {}