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use std::ops::{Deref, DerefMut};
use std::os::raw::c_char;
use std::sync::{Once, ONCE_INIT};
use declare::{ClassDecl, ProtocolDecl};
use runtime::{Class, Object, Protocol, Sel, self};
use {Encode, Encoding};
pub struct CustomObject {
obj: *mut Object,
}
impl CustomObject {
fn new(class: &Class) -> Self {
let obj = unsafe {
runtime::class_createInstance(class, 0)
};
CustomObject { obj: obj }
}
}
impl Deref for CustomObject {
type Target = Object;
fn deref(&self) -> &Object {
unsafe { &*self.obj }
}
}
impl DerefMut for CustomObject {
fn deref_mut(&mut self) -> &mut Object {
unsafe { &mut *self.obj }
}
}
impl Drop for CustomObject {
fn drop(&mut self) {
unsafe {
runtime::object_dispose(self.obj);
}
}
}
#[derive(Eq, PartialEq)]
pub struct CustomStruct {
pub a: u64,
pub b: u64,
pub c: u64,
pub d: u64,
}
unsafe impl Encode for CustomStruct {
fn encode() -> Encoding {
let mut code = "{CustomStruct=".to_owned();
for _ in 0..4 {
code.push_str(u64::encode().as_str());
}
code.push_str("}");
unsafe {
Encoding::from_str(&code)
}
}
}
pub fn custom_class() -> &'static Class {
static REGISTER_CUSTOM_CLASS: Once = ONCE_INIT;
REGISTER_CUSTOM_CLASS.call_once(|| {
// The runtime will call this method, so it has to be implemented
extern fn custom_obj_class_initialize(_this: &Class, _cmd: Sel) { }
let mut decl = ClassDecl::root("CustomObject", custom_obj_class_initialize).unwrap();
let proto = custom_protocol();
decl.add_protocol(proto);
decl.add_ivar::<u32>("_foo");
extern fn custom_obj_set_foo(this: &mut Object, _cmd: Sel, foo: u32) {
unsafe { this.set_ivar::<u32>("_foo", foo); }
}
extern fn custom_obj_get_foo(this: &Object, _cmd: Sel) -> u32 {
unsafe { *this.get_ivar::<u32>("_foo") }
}
extern fn custom_obj_get_struct(_this: &Object, _cmd: Sel) -> CustomStruct {
CustomStruct { a: 1, b: 2, c: 3, d: 4 }
}
extern fn custom_obj_class_method(_this: &Class, _cmd: Sel) -> u32 {
7
}
extern fn custom_obj_set_bar(this: &mut Object, _cmd: Sel, bar: u32) {
unsafe { this.set_ivar::<u32>("_foo", bar) ;}
}
extern fn custom_obj_add_number_to_number(_this: &Class, _cmd: Sel, fst: i32, snd: i32) -> i32 {
fst + snd
}
unsafe {
let set_foo: extern fn(&mut Object, Sel, u32) = custom_obj_set_foo;
decl.add_method(sel!(setFoo:), set_foo);
let get_foo: extern fn(&Object, Sel) -> u32 = custom_obj_get_foo;
decl.add_method(sel!(foo), get_foo);
let get_struct: extern fn(&Object, Sel) -> CustomStruct = custom_obj_get_struct;
decl.add_method(sel!(customStruct), get_struct);
let class_method: extern fn(&Class, Sel) -> u32 = custom_obj_class_method;
decl.add_class_method(sel!(classFoo), class_method);
let protocol_instance_method: extern fn(&mut Object, Sel, u32) = custom_obj_set_bar;
decl.add_method(sel!(setBar:), protocol_instance_method);
let protocol_class_method: extern fn(&Class, Sel, i32, i32) -> i32 = custom_obj_add_number_to_number;
decl.add_class_method(sel!(addNumber:toNumber:), protocol_class_method);
}
decl.register();
});
class!(CustomObject)
}
pub fn custom_protocol() -> &'static Protocol {
static REGISTER_CUSTOM_PROTOCOL: Once = ONCE_INIT;
REGISTER_CUSTOM_PROTOCOL.call_once(|| {
let mut decl = ProtocolDecl::new("CustomProtocol").unwrap();
decl.add_method_description::<(i32,), ()>(sel!(setBar:), true);
decl.add_method_description::<(), *const c_char>(sel!(getName), false);
decl.add_class_method_description::<(i32, i32), i32>(sel!(addNumber:toNumber:), true);
decl.register();
});
Protocol::get("CustomProtocol").unwrap()
}
pub fn custom_subprotocol() -> &'static Protocol {
static REGISTER_CUSTOM_SUBPROTOCOL: Once = ONCE_INIT;
REGISTER_CUSTOM_SUBPROTOCOL.call_once(|| {
let super_proto = custom_protocol();
let mut decl = ProtocolDecl::new("CustomSubProtocol").unwrap();
decl.add_protocol(super_proto);
decl.add_method_description::<(u32,), u32>(sel!(calculateFoo:), true);
decl.register();
});
Protocol::get("CustomSubProtocol").unwrap()
}
pub fn custom_object() -> CustomObject {
CustomObject::new(custom_class())
}
pub fn custom_subclass() -> &'static Class {
static REGISTER_CUSTOM_SUBCLASS: Once = ONCE_INIT;
REGISTER_CUSTOM_SUBCLASS.call_once(|| {
let superclass = custom_class();
let mut decl = ClassDecl::new("CustomSubclassObject", superclass).unwrap();
extern fn custom_subclass_get_foo(this: &Object, _cmd: Sel) -> u32 {
let foo: u32 = unsafe {
msg_send![super(this, custom_class()), foo]
};
foo + 2
}
unsafe {
let get_foo: extern fn(&Object, Sel) -> u32 = custom_subclass_get_foo;
decl.add_method(sel!(foo), get_foo);
}
decl.register();
});
class!(CustomSubclassObject)
}
pub fn custom_subclass_object() -> CustomObject {
CustomObject::new(custom_subclass())
}