napi_h/bindgen_runtime/js_values/
class.rs

1use std::any::type_name;
2use std::ops::{Deref, DerefMut};
3use std::ptr;
4
5use super::Object;
6use crate::{
7  bindgen_runtime::{FromNapiValue, TypeName, ValidateNapiValue},
8  check_status, sys, Env, NapiRaw, NapiValue, ValueType,
9};
10
11pub type This<T = Object> = T;
12
13pub struct ClassInstance<T: 'static> {
14  pub value: sys::napi_value,
15  inner: &'static mut T,
16}
17
18impl<T: 'static> ClassInstance<T> {
19  #[doc(hidden)]
20  pub fn new(value: sys::napi_value, inner: &'static mut T) -> Self {
21    Self { value, inner }
22  }
23
24  pub fn as_object(&self, env: Env) -> Object {
25    unsafe { Object::from_raw_unchecked(env.raw(), self.value) }
26  }
27}
28
29impl<T: 'static> NapiRaw for ClassInstance<T> {
30  unsafe fn raw(&self) -> sys::napi_value {
31    self.value
32  }
33}
34
35impl<T: 'static> TypeName for ClassInstance<T>
36where
37  &'static T: TypeName,
38{
39  fn type_name() -> &'static str {
40    type_name::<&T>()
41  }
42
43  fn value_type() -> ValueType {
44    <&T>::value_type()
45  }
46}
47
48impl<T: 'static> ValidateNapiValue for ClassInstance<T>
49where
50  &'static T: ValidateNapiValue,
51{
52  unsafe fn validate(
53    env: sys::napi_env,
54    napi_val: sys::napi_value,
55  ) -> crate::Result<sys::napi_value> {
56    unsafe { <&T>::validate(env, napi_val) }
57  }
58}
59
60impl<T: 'static> FromNapiValue for ClassInstance<T> {
61  unsafe fn from_napi_value(env: sys::napi_env, napi_val: sys::napi_value) -> crate::Result<Self> {
62    let mut value = ptr::null_mut();
63    check_status!(
64      unsafe { sys::napi_unwrap(env, napi_val, &mut value) },
65      "Unwrap value [{}] from class failed",
66      type_name::<T>(),
67    )?;
68    let value = unsafe { Box::from_raw(value as *mut T) };
69    Ok(Self {
70      value: napi_val,
71      inner: Box::leak(value),
72    })
73  }
74}
75
76impl<T: 'static> Deref for ClassInstance<T> {
77  type Target = T;
78
79  fn deref(&self) -> &Self::Target {
80    self.inner
81  }
82}
83
84impl<T: 'static> DerefMut for ClassInstance<T> {
85  fn deref_mut(&mut self) -> &mut T {
86    self.inner
87  }
88}
89
90impl<T: 'static> AsRef<T> for ClassInstance<T> {
91  fn as_ref(&self) -> &T {
92    self.inner
93  }
94}
95
96impl<T: 'static> AsMut<T> for ClassInstance<T> {
97  fn as_mut(&mut self) -> &mut T {
98    self.inner
99  }
100}
napi_h/bindgen_runtime/js_values/class.rs

napi_h/bindgen_runtime/js_values/
class.rs
