makepad-platform 1.0.0

Makepad platform layer
Documentation 
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use {
    crate::{
        //makepad_error_log::*,
        apple_util::nsstring_to_string, makepad_objc_sys::{objc_block, objc_block_invoke}, os::{
            apple::apple_sys::*,
            apple_util::str_to_nsstring,
            cx_stdin::PresentableImageId,
        }
    }, std::{collections::HashMap, sync::Mutex}
};

static mut METAL_XPC_CLASSES: *const MetalXPCClasses = 0 as *const _;
static mut METAL_XPC_STORAGE: *const MetalXPCStorage = 0 as *const _;
fn get_metal_xpc_classes() -> &'static MetalXPCClasses {unsafe {&*(METAL_XPC_CLASSES)}}
fn get_metal_xpc_storage() -> &'static MetalXPCStorage {unsafe {&*(METAL_XPC_STORAGE)}}

struct MetalXPCClasses {
    pub xpc_service_delegate: *const Class,
    pub xpc_service_protocol: *const Protocol,
    pub xpc_service_class: *const Class,
}

#[derive(Default)]
struct MetalXPCStorage {
    pub textures_by_presentable_image_id_u64: Mutex<HashMap<u64, RcObjcId>>,
}

impl MetalXPCClasses {
    pub fn new() -> Self {
        Self {
            xpc_service_delegate: define_xpc_service_delegate(),
            xpc_service_protocol: unsafe {define_xpc_service_protocol()},
            xpc_service_class: define_xpc_service_class(),
        }
    }
}

extern "C" {
    fn define_xpc_service_protocol() -> &'static Protocol;
    fn hackily_heapify_block2_obj_u64(data: *const c_void) -> ObjcId;
    fn hackily_heapify_block0(data: *const c_void) -> ObjcId;
}
/*
pub fn xpc_service_proxy_poll_run_loop() {
    unsafe {
        let nsrunloop: ObjcId = msg_send![class!(NSRunLoop), mainRunLoop];
        let nsuntil: ObjcId = msg_send![class!(NSDate), distantPast];
        let () = msg_send![nsrunloop, runUntilDate: nsuntil];
    }
}*/

pub fn xpc_service_proxy() -> RcObjcId {
    unsafe {
        if METAL_XPC_CLASSES == 0 as *const _ {
            METAL_XPC_CLASSES = Box::into_raw(Box::new(MetalXPCClasses::new()));
        } 
        let connection: ObjcId = msg_send![class!(NSXPCConnection), new];
        let nsstring = str_to_nsstring("dev.makepad.metalxpc");
        let () = msg_send![connection, initWithMachServiceName: nsstring options: 0];
        let iface: ObjcId = msg_send![
            class!(NSXPCInterface),
            interfaceWithProtocol: get_metal_xpc_classes().xpc_service_protocol
        ];
        let () = msg_send![connection, setRemoteObjectInterface: iface];
        let () = msg_send![connection, resume];
        let error_handler = objc_block!(move | error: ObjcId | {
            let desc: ObjcId = msg_send![error, localizedDescription];
            crate::log!("xpc_service_proxy got error: {}", nsstring_to_string(desc));
        });
        let proxy: ObjcId = msg_send![connection, remoteObjectProxyWithErrorHandler: &error_handler];
        RcObjcId::from_unowned(NonNull::new(proxy).unwrap())
    }
}

pub fn fetch_xpc_service_texture(proxy: ObjcId, id: PresentableImageId, f: impl Fn(RcObjcId) + 'static) {
    unsafe {
        let completion_block = objc_block!(move |texture: ObjcId, _padding: u64| {
            //log!("FETCH RETUREND");
            f(RcObjcId::from_unowned(NonNull::new(texture).unwrap()))
        });
        let completion_block = hackily_heapify_block2_obj_u64(&completion_block as *const _ as *const _);
        let () = msg_send![proxy, fetchTexture: id.as_u64() _padding: 0 with: completion_block];
    } 
}

pub fn store_xpc_service_texture(id: PresentableImageId, obj: ObjcId) {
    //log!("STORING {}", obj as *const _ as u64);
    unsafe {
        let proxy = xpc_service_proxy();
        let completion_block = objc_block!(move | | {
            //log!("store texture complete!");
        });
        let completion_block = hackily_heapify_block0(&completion_block as *const _ as *const _);
        let () = msg_send![proxy.as_id(), storeTexture: id.as_u64() obj: obj _padding: 0 with: completion_block];
    }
}

use std::io::prelude::*;

pub fn insane_debug_out(what: &str) {
    let mut file = std::fs::OpenOptions::new()
        .append(true)
        .open("/Users/admin/makepad/edit_repo/insane.log")
        .unwrap();
    
    let _ = file.write_all(format!("{}\n", what).as_bytes());
}

pub fn start_xpc_service() {
    unsafe {
        //insane_debug_out("START XPC SERVICE");
        METAL_XPC_CLASSES = Box::into_raw(Box::new(MetalXPCClasses::new()));
        METAL_XPC_STORAGE = Box::into_raw(Box::new(MetalXPCStorage::default()));
        let delegate: ObjcId = msg_send![get_metal_xpc_classes().xpc_service_delegate, new];
        let nsstring = str_to_nsstring("dev.makepad.metalxpc");
        let listener: ObjcId = msg_send![class!(NSXPCListener), new];
        let () = msg_send![listener, setDelegate: delegate];
        let () = msg_send![listener, initWithMachServiceName: nsstring];
        let () = msg_send![listener, activate];
        let nsrunloop: ObjcId = msg_send![class!(NSRunLoop), mainRunLoop];
        let () = msg_send![nsrunloop, run];
        //insane_debug_out("STOP XPC SERVICE");
    }
}

pub fn define_xpc_service_delegate() -> *const Class {
    
    extern "C" fn listener(_this: &Object, _: Sel, _listener: ObjcId, connection: ObjcId) -> bool {
        //insane_debug_out("LISTENER INCOMING");
        unsafe {
            let iface: ObjcId = msg_send![
                class!(NSXPCInterface),
                interfaceWithProtocol: get_metal_xpc_classes().xpc_service_protocol
            ];
            
            let api: ObjcId = msg_send![get_metal_xpc_classes().xpc_service_class, new];
            
            let () = msg_send![connection, setExportedInterface: iface];
            let () = msg_send![connection, setExportedObject: api];
            let () = msg_send![connection, resume];
        }
        true
    }
    
    let superclass = class!(NSObject);
    let mut decl = ClassDecl::new("MetalXPCServiceDelegate", superclass).unwrap();
    
    unsafe {
        decl.add_method(sel!(listener: shouldAcceptNewConnection:), listener as extern "C" fn(&Object, Sel, ObjcId, ObjcId) -> bool);
    }
    
    return decl.register();
}

pub fn define_xpc_service_class() -> *const Class {
    
    extern "C" fn fetch_texture(_this: &Object, _: Sel, presentable_image_id_u64: u64, _padding: u64, completion: ObjcId) {
        let storage = get_metal_xpc_storage();
        if let Some(obj) = storage.textures_by_presentable_image_id_u64.lock().unwrap().remove(&presentable_image_id_u64) {
            unsafe {
                objc_block_invoke!(completion, invoke(
                    (obj.as_id()): ObjcId,
                    (0): u64
                ));
            }
        } 
        //storage.textures_by_presentable_image_id_u64.lock().unwrap().clear();
        //insane_debug_out("GOT CALL! POST FETCH TEXTURE!");
    }
     
    extern "C" fn store_texture(_this: &Object, _: Sel, presentable_image_id_u64: u64, obj: ObjcId, _padding: u64, completion: ObjcId) {
        let storage = get_metal_xpc_storage();
        storage.textures_by_presentable_image_id_u64.lock().unwrap().insert(
            presentable_image_id_u64,
            RcObjcId::from_unowned(NonNull::new(obj).unwrap())
        );
        unsafe {objc_block_invoke!(completion, invoke());}
        //insane_debug_out(&format!("STORE TEXTURE! {}", index));
    }
    
    let superclass = class!(NSObject);
    let mut decl = ClassDecl::new("MetalXPCServiceAPI", superclass).unwrap();
    
    // Add callback methods
    unsafe {
        decl.add_method(sel!(fetchTexture: _padding: with:), fetch_texture as extern "C" fn(&Object, Sel, u64, u64, ObjcId));
        decl.add_method(sel!(storeTexture: obj: _padding: with:), store_texture as extern "C" fn(&Object, Sel, u64, ObjcId, u64, ObjcId));
        decl.add_protocol(define_xpc_service_protocol());
    }
    
    return decl.register();
}