71 lines
1.8 KiB
Rust
71 lines
1.8 KiB
Rust
use std::ptr;
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use crate::error::check_status;
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use crate::{sys, Either, Env, Error, JsUndefined, JsUnknown, NapiValue, Result, Status};
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pub struct CallContext<'env, T: NapiValue = JsUnknown> {
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pub env: &'env Env,
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pub this: T,
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callback_info: sys::napi_callback_info,
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args: &'env [sys::napi_value],
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arg_len: usize,
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actual_arg_length: usize,
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}
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impl<'env, T: NapiValue> CallContext<'env, T> {
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#[inline]
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pub fn new(
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env: &'env Env,
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callback_info: sys::napi_callback_info,
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this: sys::napi_value,
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args: &'env [sys::napi_value],
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arg_len: usize,
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actual_arg_length: usize,
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) -> Result<Self> {
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Ok(Self {
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env,
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callback_info,
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this: T::from_raw(env.0, this)?,
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args,
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arg_len,
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actual_arg_length,
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})
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}
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#[inline]
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pub fn get<ArgType: NapiValue>(&self, index: usize) -> Result<ArgType> {
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if index + 1 > self.arg_len {
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Err(Error {
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status: Status::GenericFailure,
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reason: "Arguments index out of range".to_owned(),
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})
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} else {
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ArgType::from_raw(self.env.0, self.args[index])
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}
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}
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#[inline]
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pub fn try_get<ArgType: NapiValue>(&self, index: usize) -> Result<Either<ArgType, JsUndefined>> {
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if index + 1 > self.arg_len {
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Err(Error {
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status: Status::GenericFailure,
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reason: "Arguments index out of range".to_owned(),
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})
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} else {
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if index < self.actual_arg_length {
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ArgType::from_raw(self.env.0, self.args[index]).map(Either::A)
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} else {
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self.env.get_undefined().map(Either::B)
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}
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}
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}
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pub fn get_new_target<V>(&self) -> Result<V>
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where
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V: NapiValue,
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{
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let mut value = ptr::null_mut();
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check_status(unsafe { sys::napi_get_new_target(self.env.0, self.callback_info, &mut value) })?;
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V::from_raw(self.env.0, value)
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}
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}
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