75 lines
2.5 KiB
Rust
75 lines
2.5 KiB
Rust
use std::convert::TryInto;
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use napi::{CallContext, JsFunction, JsNumber, JsObject, JsUndefined, Property, Result};
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struct NativeClass {
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value: i32,
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}
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#[js_function(1)]
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fn create_test_class(ctx: CallContext) -> Result<JsFunction> {
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let add_count_method = Property::new("addCount")?.with_method(add_count);
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let add_native_count = Property::new("addNativeCount")?.with_method(add_native_count);
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let renew_wrapped = Property::new("renewWrapped")?.with_method(renew_wrapped);
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ctx.env.define_class(
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"TestClass",
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test_class_constructor,
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&[add_count_method, add_native_count, renew_wrapped],
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)
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}
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#[js_function(1)]
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fn test_class_constructor(ctx: CallContext) -> Result<JsUndefined> {
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let count: i32 = ctx.get::<JsNumber>(0)?.try_into()?;
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let mut this: JsObject = ctx.this_unchecked();
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ctx
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.env
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.wrap(&mut this, NativeClass { value: count + 100 })?;
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this.set_named_property("count", ctx.env.create_int32(count)?)?;
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ctx.env.get_undefined()
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}
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#[js_function(1)]
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fn add_count(ctx: CallContext) -> Result<JsUndefined> {
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let add: i32 = ctx.get::<JsNumber>(0)?.try_into()?;
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let mut this: JsObject = ctx.this_unchecked();
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let count: i32 = this.get_named_property::<JsNumber>("count")?.try_into()?;
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this.set_named_property("count", ctx.env.create_int32(count + add)?)?;
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ctx.env.get_undefined()
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}
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#[js_function(1)]
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fn add_native_count(ctx: CallContext) -> Result<JsNumber> {
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let add: i32 = ctx.get::<JsNumber>(0)?.try_into()?;
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let this: JsObject = ctx.this_unchecked();
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let native_class: &mut NativeClass = ctx.env.unwrap(&this)?;
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native_class.value += add;
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ctx.env.create_int32(native_class.value)
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}
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#[js_function]
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fn renew_wrapped(ctx: CallContext) -> Result<JsUndefined> {
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let mut this: JsObject = ctx.this_unchecked();
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ctx.env.drop_wrapped::<NativeClass>(&mut this)?;
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ctx.env.wrap(&mut this, NativeClass { value: 42 })?;
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ctx.env.get_undefined()
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}
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#[js_function(1)]
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fn new_test_class(ctx: CallContext) -> Result<JsObject> {
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let add_count_method = Property::new("addCount")?.with_method(add_count);
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let add_native_count = Property::new("addNativeCount")?.with_method(add_native_count);
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let properties = vec![add_count_method, add_native_count];
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let test_class =
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ctx
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.env
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.define_class("TestClass", test_class_constructor, properties.as_slice())?;
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test_class.new_instance(&[ctx.env.create_int32(42)?])
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}
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pub fn register_js(exports: &mut JsObject) -> Result<()> {
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exports.create_named_method("createTestClass", create_test_class)?;
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exports.create_named_method("newTestClass", new_test_class)?;
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Ok(())
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}
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