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use std::{ cell::{Cell, RefCell}, collections::HashMap, rc::Rc, time::Duration, }; use glib::{source_remove, timeout_add_local, Continue, MainContext, SourceId}; pub type HandleType = usize; pub const INVALID_HANDLE: HandleType = 0; pub struct PlatformRunLoop { next_handle: Cell<HandleType>, timers: Rc<RefCell<HashMap<HandleType, SourceId>>>, } #[allow(unused_variables)] impl PlatformRunLoop { pub fn new() -> Self { Self { next_handle: Cell::new(INVALID_HANDLE + 1), timers: Rc::new(RefCell::new(HashMap::new())), } } pub fn unschedule(&self, handle: HandleType) { let source = self.timers.borrow_mut().remove(&handle); if let Some(source) = source { source_remove(source); } } fn next_handle(&self) -> HandleType { let r = self.next_handle.get(); self.next_handle.replace(r + 1); r } #[must_use] pub fn schedule<F>(&self, in_time: Duration, callback: F) -> HandleType where F: FnOnce() + 'static, { let callback = Rc::new(RefCell::new(Some(callback))); let handle = self.next_handle(); let timers = self.timers.clone(); let source_id = timeout_add_local(in_time.as_millis() as u32, move || { timers.borrow_mut().remove(&handle); let f = callback .borrow_mut() .take() .expect("Timer callback was called multiple times"); f(); Continue(false) }); self.timers.borrow_mut().insert(handle, source_id); handle } pub fn run(&self) { gtk::main(); } pub fn stop(&self) { gtk::main_quit(); } pub fn new_sender(&self) -> PlatformRunLoopSender { PlatformRunLoopSender {} } } pub struct PlatformRunLoopSender {} #[allow(unused_variables)] impl PlatformRunLoopSender { pub fn send<F>(&self, callback: F) where F: FnOnce() + 'static + Send, { let context = MainContext::default(); context.invoke(callback); } }