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use proc_macro2::{Ident, TokenStream};
use proc_macro_error::abort_call_site;
use quote::quote;
use crate::utils::{crate_ident_new, find_attribute_meta, find_nested_meta, parse_name};
fn gen_option_to_ptr() -> TokenStream {
quote! {
match s {
Some(s) => ::std::boxed::Box::into_raw(::std::boxed::Box::new(s.clone())),
None => ::std::ptr::null_mut(),
};
}
}
fn gen_impl_from_value_optional(name: &Ident, crate_ident: &TokenStream) -> TokenStream {
quote! {
unsafe impl<'a> #crate_ident::value::FromValue<'a> for #name {
type Checker = #crate_ident::value::GenericValueTypeOrNoneChecker<Self>;
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);
assert!(!ptr.is_null());
*::std::boxed::Box::from_raw(ptr as *mut #name)
}
}
unsafe impl<'a> #crate_ident::value::FromValue<'a> for &'a #name {
type Checker = #crate_ident::value::GenericValueTypeOrNoneChecker<Self>;
unsafe fn from_value(value: &'a #crate_ident::Value) -> Self {
let ptr = #crate_ident::gobject_ffi::g_value_get_boxed(#crate_ident::translate::ToGlibPtr::to_glib_none(value).0);
assert!(!ptr.is_null());
&*(ptr as *mut #name)
}
}
}
}
fn gen_impl_from_value(name: &Ident, crate_ident: &TokenStream) -> TokenStream {
quote! {
unsafe impl<'a> #crate_ident::value::FromValue<'a> for #name {
type Checker = #crate_ident::value::GenericValueTypeChecker<Self>;
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);
assert!(!ptr.is_null());
*::std::boxed::Box::from_raw(ptr as *mut #name)
}
}
unsafe impl<'a> #crate_ident::value::FromValue<'a> for &'a #name {
type Checker = #crate_ident::value::GenericValueTypeChecker<Self>;
unsafe fn from_value(value: &'a #crate_ident::Value) -> Self {
let ptr = #crate_ident::gobject_ffi::g_value_get_boxed(#crate_ident::translate::ToGlibPtr::to_glib_none(value).0);
assert!(!ptr.is_null());
&*(ptr as *mut #name)
}
}
}
}
fn gen_impl_to_value_optional(name: &Ident, crate_ident: &TokenStream) -> TokenStream {
let option_to_ptr = gen_option_to_ptr();
quote! {
impl #crate_ident::value::ToValueOptional for #name {
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: *mut #name = #option_to_ptr;
#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 { }
}
}
pub fn impl_boxed(input: &syn::DeriveInput) -> TokenStream {
let name = &input.ident;
let gtype_name = match parse_name(input, "boxed_type") {
Ok(name) => name,
Err(e) => abort_call_site!(
"{}: #[derive(glib::Boxed)] requires #[boxed_type(name = \"BoxedTypeName\")]",
e
),
};
let meta = find_attribute_meta(&input.attrs, "boxed_type")
.unwrap()
.unwrap();
let nullable = find_nested_meta(&meta, "nullable").is_some();
let crate_ident = crate_ident_new();
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! {}
};
quote! {
impl #crate_ident::subclass::boxed::BoxedType for #name {
const NAME: &'static str = #gtype_name;
}
impl #crate_ident::StaticType for #name {
fn static_type() -> #crate_ident::Type {
static ONCE: ::std::sync::Once = ::std::sync::Once::new();
static mut TYPE_: #crate_ident::Type = #crate_ident::Type::INVALID;
ONCE.call_once(|| {
let type_ = #crate_ident::subclass::register_boxed_type::<#name>();
unsafe {
TYPE_ = type_;
}
});
unsafe {
assert!(TYPE_.is_valid());
TYPE_
}
}
}
impl #crate_ident::value::ValueType for #name {
type Type = #name;
}
impl #crate_ident::value::ToValue for #name {
fn to_value(&self) -> #crate_ident::Value {
unsafe {
let ptr: *mut #name = ::std::boxed::Box::into_raw(::std::boxed::Box::new(self.clone()));
let mut value = #crate_ident::Value::from_type(<#name as #crate_ident::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
}
}
fn value_type(&self) -> #crate_ident::Type {
<#name as #crate_ident::StaticType>::static_type()
}
}
#impl_to_value_optional
#impl_from_value
impl #crate_ident::translate::FromGlibPtrNone<*const #name> for #name {
#[inline]
unsafe fn from_glib_none(ptr: *const #name) -> Self {
assert!(!ptr.is_null());
(&*ptr).clone()
}
}
impl #crate_ident::translate::FromGlibPtrNone<*mut #name> for #name {
#[inline]
unsafe fn from_glib_none(ptr: *mut #name) -> Self {
#crate_ident::translate::FromGlibPtrNone::from_glib_none(ptr as *const _)
}
}
impl #crate_ident::translate::FromGlibPtrFull<*mut #name> for #name {
#[inline]
unsafe fn from_glib_full(ptr: *mut #name) -> Self {
assert!(!ptr.is_null());
*::std::boxed::Box::from_raw(ptr)
}
}
impl<'a> #crate_ident::translate::ToGlibPtr<'a, *const #name> for #name {
type Storage = &'a Self;
#[inline]
fn to_glib_none(&'a self) -> #crate_ident::translate::Stash<'a, *const #name, Self> {
#crate_ident::translate::Stash(self as *const #name, self)
}
#[inline]
fn to_glib_full(&self) -> *const #name {
::std::boxed::Box::into_raw(::std::boxed::Box::new(self.clone()))
}
}
impl<'a> #crate_ident::translate::ToGlibPtr<'a, *mut #name> for #name {
type Storage = &'a Self;
#[inline]
fn to_glib_none(&'a self) -> #crate_ident::translate::Stash<'a, *mut #name, Self> {
#crate_ident::translate::Stash(self as *const #name as *mut _, self)
}
#[inline]
fn to_glib_full(&self) -> *mut #name {
::std::boxed::Box::into_raw(::std::boxed::Box::new(self.clone())) as *mut _
}
}
}
}