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{% if self.include_once_check("CallbackInterfaceRuntime.kt") %}{% include "CallbackInterfaceRuntime.kt" %}{% endif %}
{%- let trait_impl=format!("uniffiCallbackInterface{}", name) %}
// Put the implementation in an object so we don't pollute the top-level namespace
internal object {{ trait_impl }} {
{%- for (ffi_callback, meth) in vtable_methods.iter() %}
internal object {{ meth.name()|var_name }}: {{ ffi_callback.name()|ffi_callback_name }} {
override fun callback(
{%- for arg in ffi_callback.arguments() -%}
{{ arg.name().borrow()|var_name }}: {{ arg.type_().borrow()|ffi_type_name_by_value }},
{%- endfor -%}
{%- if ffi_callback.has_rust_call_status_arg() -%}
uniffiCallStatus: UniffiRustCallStatus,
{%- endif -%}
)
{%- match ffi_callback.return_type() %}
{%- when Some(return_type) %}: {{ return_type|ffi_type_name_by_value }},
{%- when None %}
{%- endmatch %} {
val uniffiObj = {{ ffi_converter_name }}.handleMap.get(uniffiHandle)
val makeCall = {% if meth.is_async() %}suspend {% endif %}{ ->
uniffiObj.{{ meth.name()|fn_name() }}(
{%- for arg in meth.arguments() %}
{{ arg|lift_fn }}({{ arg.name()|var_name }}),
{%- endfor %}
)
}
{%- if !meth.is_async() %}
{%- match meth.return_type() %}
{%- when Some(return_type) %}
val writeReturn = { value: {{ return_type|type_name(ci) }} -> uniffiOutReturn.setValue({{ return_type|lower_fn }}(value)) }
{%- when None %}
val writeReturn = { _: Unit -> Unit }
{%- endmatch %}
{%- match meth.throws_type() %}
{%- when None %}
uniffiTraitInterfaceCall(uniffiCallStatus, makeCall, writeReturn)
{%- when Some(error_type) %}
uniffiTraitInterfaceCallWithError(
uniffiCallStatus,
makeCall,
writeReturn,
{ e: {{error_type|type_name(ci) }} -> {{ error_type|lower_fn }}(e) }
)
{%- endmatch %}
{%- else %}
val uniffiHandleSuccess = { {% if meth.return_type().is_some() %}returnValue{% else %}_{% endif %}: {% match meth.return_type() %}{%- when Some(return_type) %}{{ return_type|type_name(ci) }}{%- when None %}Unit{% endmatch %} ->
val uniffiResult = {{ meth.foreign_future_ffi_result_struct().name()|ffi_struct_name }}.UniffiByValue(
{%- match meth.return_type() %}
{%- when Some(return_type) %}
{{ return_type|lower_fn }}(returnValue),
{%- when None %}
{%- endmatch %}
UniffiRustCallStatus.ByValue()
)
uniffiResult.write()
uniffiFutureCallback.callback(uniffiCallbackData, uniffiResult)
}
val uniffiHandleError = { callStatus: UniffiRustCallStatus.ByValue ->
uniffiFutureCallback.callback(
uniffiCallbackData,
{{ meth.foreign_future_ffi_result_struct().name()|ffi_struct_name }}.UniffiByValue(
{%- match meth.return_type() %}
{%- when Some(return_type) %}
{{ return_type.into()|ffi_default_value }},
{%- when None %}
{%- endmatch %}
callStatus,
),
)
}
uniffiOutReturn.uniffiSetValue(
{%- match meth.throws_type() %}
{%- when None %}
uniffiTraitInterfaceCallAsync(
makeCall,
uniffiHandleSuccess,
uniffiHandleError
)
{%- when Some(error_type) %}
uniffiTraitInterfaceCallAsyncWithError(
makeCall,
uniffiHandleSuccess,
uniffiHandleError,
{ e: {{error_type|type_name(ci) }} -> {{ error_type|lower_fn }}(e) }
)
{%- endmatch %}
)
{%- endif %}
}
}
{%- endfor %}
internal object uniffiFree: {{ "CallbackInterfaceFree"|ffi_callback_name }} {
override fun callback(handle: Long) {
{{ ffi_converter_name }}.handleMap.remove(handle)
}
}
internal var vtable = {{ vtable|ffi_type_name_by_value }}(
{%- for (ffi_callback, meth) in vtable_methods.iter() %}
{{ meth.name()|var_name() }},
{%- endfor %}
uniffiFree,
)
// Registers the foreign callback with the Rust side.
// This method is generated for each callback interface.
internal fun register(lib: UniffiLib) {
lib.{{ ffi_init_callback.name() }}(vtable)
}
}