2020-07-18 03:00:48 +09:00
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use crate::{sys, Either, Env, Error, JsUndefined, JsUnknown, NapiValue, Result, Status};
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2020-04-21 01:20:35 +09:00
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2020-06-21 20:10:06 +09:00
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pub struct CallContext<'env, T: NapiValue = JsUnknown> {
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2020-05-09 16:14:44 +09:00
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pub env: &'env Env,
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2020-06-21 20:10:06 +09:00
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pub this: T,
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2020-06-21 18:50:38 +09:00
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args: &'env [sys::napi_value],
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2020-04-21 01:20:35 +09:00
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arg_len: usize,
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2020-07-18 03:00:48 +09:00
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actual_arg_length: usize,
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2020-04-21 01:20:35 +09:00
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}
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2020-06-21 20:10:06 +09:00
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impl<'env, T: NapiValue> CallContext<'env, T> {
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2020-05-09 16:14:44 +09:00
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#[inline]
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2020-04-26 19:46:56 +09:00
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pub fn new(
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2020-05-09 16:14:44 +09:00
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env: &'env Env,
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2020-04-26 19:46:56 +09:00
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this: sys::napi_value,
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2020-06-21 18:50:38 +09:00
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args: &'env [sys::napi_value],
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2020-04-26 19:46:56 +09:00
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arg_len: usize,
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2020-07-18 03:00:48 +09:00
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actual_arg_length: usize,
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2020-04-26 19:46:56 +09:00
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) -> Result<Self> {
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Ok(Self {
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env,
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2020-06-21 20:10:06 +09:00
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this: T::from_raw(env.0, this)?,
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2020-04-26 19:46:56 +09:00
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args,
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arg_len,
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2020-07-18 03:00:48 +09:00
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actual_arg_length,
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2020-04-26 19:46:56 +09:00
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})
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2020-04-21 01:20:35 +09:00
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}
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2020-05-09 16:14:44 +09:00
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#[inline]
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2020-06-21 20:10:06 +09:00
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pub fn get<ArgType: NapiValue>(&self, index: usize) -> Result<ArgType> {
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2020-04-21 01:20:35 +09:00
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if index + 1 > self.arg_len {
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2020-05-06 00:13:23 +09:00
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Err(Error {
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status: Status::GenericFailure,
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2020-06-21 20:10:06 +09:00
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reason: "Arguments index out of range".to_owned(),
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2020-05-06 00:13:23 +09:00
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})
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2020-04-21 01:20:35 +09:00
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} else {
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2020-06-21 20:10:06 +09:00
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ArgType::from_raw(self.env.0, self.args[index])
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2020-04-21 01:20:35 +09:00
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}
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}
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2020-07-18 03:00:48 +09:00
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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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2020-04-21 01:20:35 +09:00
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}
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