nw_sys/
nw.rs

1//!
2//! Provides access to the global `nw` namespace and [`try_nw`] functions allowing
3//! to detect if the application is running inside of Node Webkit or in the browser.
4//!
5
6use js_sys::{Function, Object};
7use wasm_bindgen::prelude::*;
8
9#[wasm_bindgen]
10extern "C" {
11    /// Access to the global `nw` namespace.
12    ///
13    /// ⧉ [NWJS Documentation](https://docs.nwjs.io/en/latest/)
14    ///
15    #[wasm_bindgen (extends = Object, js_name = nw)]
16    #[derive(Debug, Clone)]
17    pub type Nw;
18
19    #[wasm_bindgen(js_namespace = console)]
20    pub fn error(s: &str);
21}
22
23/// Getter for the global `nw` namespace object
24///
25///
26/// ⧉ [NWJS Documentation]: https://docs.nwjs.io/en/latest/
27pub fn try_nw() -> Result<Nw, JsValue> {
28    let nw_opt = Function::new_no_args("return this.nw").call0(&JsValue::undefined());
29
30    match nw_opt {
31        Ok(value) => {
32            if value.is_undefined() {
33                error("NW not found");
34                Err(value)
35            } else {
36                let nw_ns: Nw = value.into();
37                Ok(nw_ns)
38            }
39        }
40        Err(err) => {
41            error(&format!("NW not found, error: {:?}", err));
42            Err(err)
43        }
44    }
45}
46
47/// Helper to test whether the application is running under
48/// Node Webkit or in a regular browser environment.
49pub fn is_nw() -> bool {
50    try_nw().is_ok()
51}
nw_sys/nw.rs

nw_sys/
nw.rs
