glib_macros/
shared_boxed_derive.rsuse proc_macro2::{Ident, TokenStream};
use quote::quote;
use crate::utils::{crate_ident_new, parse_nested_meta_items, NestedMetaItem};
fn gen_impl_to_value_optional(name: &Ident, crate_ident: &TokenStream) -> TokenStream {
let refcounted_type_prefix = refcounted_type_prefix(name, crate_ident);
quote! {
impl #crate_ident::value::ToValueOptional for #name {
#[inline]
fn to_value_optional(s: ::core::option::Option<&Self>) -> #crate_ident::Value {
let mut value = #crate_ident::Value::for_value_type::<Self>();
unsafe {
let ptr = match s {
::core::option::Option::Some(s) => #refcounted_type_prefix::into_raw(s.0.clone()),
::core::option::Option::None => ::std::ptr::null(),
};
#crate_ident::gobject_ffi::g_value_take_boxed(
#crate_ident::translate::ToGlibPtrMut::to_glib_none_mut(&mut value).0,
ptr as *mut _
);
}
value
}
}
impl #crate_ident::value::ValueTypeOptional for #name { }
}
}
fn gen_impl_from_value_optional(name: &Ident, crate_ident: &TokenStream) -> TokenStream {
let refcounted_type_prefix = refcounted_type_prefix(name, crate_ident);
quote! {
unsafe impl<'a> #crate_ident::value::FromValue<'a> for #name {
type Checker = #crate_ident::value::GenericValueTypeOrNoneChecker<Self>;
#[inline]
unsafe fn from_value(value: &'a #crate_ident::Value) -> Self {
let ptr = #crate_ident::gobject_ffi::g_value_dup_boxed(#crate_ident::translate::ToGlibPtr::to_glib_none(value).0);
debug_assert!(!ptr.is_null());
#name(#refcounted_type_prefix::from_raw(ptr as *mut _))
}
}
}
}
fn gen_impl_from_value(name: &Ident, crate_ident: &TokenStream) -> TokenStream {
let refcounted_type_prefix = refcounted_type_prefix(name, crate_ident);
quote! {
unsafe impl<'a> #crate_ident::value::FromValue<'a> for #name {
type Checker = #crate_ident::value::GenericValueTypeChecker<Self>;
#[inline]
unsafe fn from_value(value: &'a #crate_ident::Value) -> Self {
let ptr = #crate_ident::gobject_ffi::g_value_dup_boxed(#crate_ident::translate::ToGlibPtr::to_glib_none(value).0);
debug_assert!(!ptr.is_null());
#name(#refcounted_type_prefix::from_raw(ptr as *mut _))
}
}
}
}
fn refcounted_type(input: &syn::DeriveInput) -> Option<&syn::TypePath> {
let fields = match &input.data {
syn::Data::Struct(s) => &s.fields,
_ => return None,
};
let unnamed = match fields {
syn::Fields::Unnamed(u) if u.unnamed.len() == 1 => &u.unnamed[0],
_ => return None,
};
let refcounted = match &unnamed.ty {
syn::Type::Path(p) => p,
_ => return None,
};
Some(refcounted)
}
fn refcounted_type_prefix(name: &Ident, crate_ident: &TokenStream) -> proc_macro2::TokenStream {
quote! {
<<#name as #crate_ident::subclass::shared::SharedType>::RefCountedType as #crate_ident::subclass::shared::RefCounted>
}
}
pub fn impl_shared_boxed(input: &syn::DeriveInput) -> syn::Result<proc_macro2::TokenStream> {
let name = &input.ident;
let Some(refcounted_type) = refcounted_type(input) else {
return Err(syn::Error::new_spanned(
input,
"#[derive(glib::SharedBoxed)] requires struct MyStruct(T: RefCounted)",
));
};
let mut gtype_name = NestedMetaItem::<syn::LitStr>::new("name")
.required()
.value_required();
let mut nullable = NestedMetaItem::<syn::LitBool>::new("nullable").value_optional();
let mut allow_name_conflict =
NestedMetaItem::<syn::LitBool>::new("allow_name_conflict").value_optional();
let found = parse_nested_meta_items(
&input.attrs,
"shared_boxed_type",
&mut [&mut gtype_name, &mut nullable, &mut allow_name_conflict],
)?;
if found.is_none() {
return Err(syn::Error::new_spanned(input,
"#[derive(glib::SharedBoxed)] requires #[shared_boxed_type(name = \"SharedBoxedTypeName\")]"
));
}
let gtype_name = gtype_name.value.unwrap();
let nullable = nullable.found || nullable.value.map(|b| b.value()).unwrap_or(false);
let allow_name_conflict = allow_name_conflict.found
|| allow_name_conflict
.value
.map(|b| b.value())
.unwrap_or(false);
let crate_ident = crate_ident_new();
let refcounted_type_prefix = refcounted_type_prefix(name, &crate_ident);
let impl_from_value = if !nullable {
gen_impl_from_value(name, &crate_ident)
} else {
gen_impl_from_value_optional(name, &crate_ident)
};
let impl_to_value_optional = if nullable {
gen_impl_to_value_optional(name, &crate_ident)
} else {
quote! {}
};
Ok(quote! {
impl #crate_ident::subclass::shared::SharedType for #name {
const NAME: &'static ::core::primitive::str = #gtype_name;
const ALLOW_NAME_CONFLICT: bool = #allow_name_conflict;
type RefCountedType = #refcounted_type;
#[inline]
fn from_refcounted(this: Self::RefCountedType) -> Self {
Self(this)
}
#[inline]
fn into_refcounted(self) -> Self::RefCountedType {
self.0
}
}
impl #crate_ident::prelude::StaticType for #name {
#[inline]
fn static_type() -> #crate_ident::Type {
static TYPE: ::std::sync::OnceLock<#crate_ident::Type> = ::std::sync::OnceLock::new();
*TYPE.get_or_init(|| {
#crate_ident::subclass::shared::register_shared_type::<#name>()
})
}
}
impl #crate_ident::value::ValueType for #name {
type Type = #name;
}
impl #crate_ident::value::ToValue for #name {
#[inline]
fn to_value(&self) -> #crate_ident::Value {
unsafe {
let ptr = #refcounted_type_prefix::into_raw(self.0.clone());
let mut value = #crate_ident::Value::from_type_unchecked(<#name as #crate_ident::prelude::StaticType>::static_type());
#crate_ident::gobject_ffi::g_value_take_boxed(
#crate_ident::translate::ToGlibPtrMut::to_glib_none_mut(&mut value).0,
ptr as *mut _
);
value
}
}
#[inline]
fn value_type(&self) -> #crate_ident::Type {
<#name as #crate_ident::prelude::StaticType>::static_type()
}
}
impl ::std::convert::From<#name> for #crate_ident::Value {
#[inline]
fn from(v: #name) -> Self {
unsafe {
let mut value = #crate_ident::Value::from_type_unchecked(<#name as #crate_ident::prelude::StaticType>::static_type());
#crate_ident::gobject_ffi::g_value_take_boxed(
#crate_ident::translate::ToGlibPtrMut::to_glib_none_mut(&mut value).0,
#crate_ident::translate::IntoGlibPtr::<*mut #refcounted_type_prefix::InnerType>::into_glib_ptr(v) as *mut _,
);
value
}
}
}
#impl_to_value_optional
#impl_from_value
impl #crate_ident::translate::GlibPtrDefault for #name {
type GlibType = *mut #refcounted_type_prefix::InnerType;
}
impl #crate_ident::translate::FromGlibPtrBorrow<*const #refcounted_type_prefix::InnerType> for #name {
#[inline]
unsafe fn from_glib_borrow(ptr: *const #refcounted_type_prefix::InnerType) -> #crate_ident::translate::Borrowed<Self> {
debug_assert!(!ptr.is_null());
#crate_ident::translate::Borrowed::new(#name(#refcounted_type_prefix::from_raw(ptr)))
}
}
impl #crate_ident::translate::FromGlibPtrBorrow<*mut #refcounted_type_prefix::InnerType> for #name {
#[inline]
unsafe fn from_glib_borrow(ptr: *mut #refcounted_type_prefix::InnerType) -> #crate_ident::translate::Borrowed<Self> {
#crate_ident::translate::FromGlibPtrBorrow::from_glib_borrow(ptr as *const _)
}
}
impl #crate_ident::translate::FromGlibPtrNone<*const #refcounted_type_prefix::InnerType> for #name {
#[inline]
unsafe fn from_glib_none(ptr: *const #refcounted_type_prefix::InnerType) -> Self {
let ptr = #refcounted_type_prefix::ref_(ptr);
#name(#refcounted_type_prefix::from_raw(ptr))
}
}
impl #crate_ident::translate::FromGlibPtrNone<*mut #refcounted_type_prefix::InnerType> for #name {
#[inline]
unsafe fn from_glib_none(ptr: *mut #refcounted_type_prefix::InnerType) -> Self {
#crate_ident::translate::FromGlibPtrNone::from_glib_none(ptr as *const _)
}
}
impl #crate_ident::translate::FromGlibPtrFull<*mut #refcounted_type_prefix::InnerType> for #name {
#[inline]
unsafe fn from_glib_full(ptr: *mut #refcounted_type_prefix::InnerType) -> Self {
#name(#refcounted_type_prefix::from_raw(ptr))
}
}
impl #crate_ident::translate::IntoGlibPtr<*mut #refcounted_type_prefix::InnerType> for #name {
#[inline]
unsafe fn into_glib_ptr(self) -> *mut #refcounted_type_prefix::InnerType {
let r = <Self as #crate_ident::subclass::shared::SharedType>::into_refcounted(self);
#refcounted_type_prefix::into_raw(r) as *mut _
}
}
impl<'a> #crate_ident::translate::ToGlibPtr<'a, *const #refcounted_type_prefix::InnerType> for #name {
type Storage = std::marker::PhantomData<&'a Self>;
#[inline]
fn to_glib_none(&'a self) -> #crate_ident::translate::Stash<'a, *const #refcounted_type_prefix::InnerType, Self> {
unsafe {
#crate_ident::translate::Stash(#refcounted_type_prefix::as_ptr(&self.0), std::marker::PhantomData)
}
}
#[inline]
fn to_glib_full(&self) -> *const #refcounted_type_prefix::InnerType {
let r = <#name as #crate_ident::subclass::shared::SharedType>::into_refcounted(self.clone());
unsafe {
#refcounted_type_prefix::into_raw(r)
}
}
}
impl<'a> #crate_ident::translate::ToGlibPtr<'a, *mut #refcounted_type_prefix::InnerType> for #name {
type Storage = std::marker::PhantomData<&'a Self>;
#[inline]
fn to_glib_none(&'a self) -> #crate_ident::translate::Stash<'a, *mut #refcounted_type_prefix::InnerType, Self> {
unsafe {
#crate_ident::translate::Stash(#refcounted_type_prefix::as_ptr(&self.0) as *mut _, std::marker::PhantomData)
}
}
#[inline]
fn to_glib_full(&self) -> *mut #refcounted_type_prefix::InnerType {
let r = <#name as #crate_ident::subclass::shared::SharedType>::into_refcounted(self.clone());
unsafe {
#refcounted_type_prefix::into_raw(r) as *mut _
}
}
}
impl #crate_ident::HasParamSpec for #name {
type ParamSpec = #crate_ident::ParamSpecBoxed;
type SetValue = Self;
type BuilderFn = fn(&::core::primitive::str) -> #crate_ident::ParamSpecBoxedBuilder<Self>;
fn param_spec_builder() -> Self::BuilderFn {
|name| Self::ParamSpec::builder(name)
}
}
})
}