29 lines
953 B
Rust
29 lines
953 B
Rust
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//! Everything useful for the `WindowController`. Handles injecting an `NSWindowController` subclass
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//! into the Objective C runtime, which loops back to give us lifecycle methods.
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use std::sync::Once;
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use objc::declare::ClassDecl;
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use objc::runtime::Class;
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use objc::class;
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use crate::window::{WindowDelegate, WINDOW_DELEGATE_PTR};
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/// Injects an `NSWindowController` subclass, with some callback and pointer ivars for what we
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/// need to do.
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pub(crate) fn register_window_controller_class<T: WindowDelegate>() -> *const Class {
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static mut DELEGATE_CLASS: *const Class = 0 as *const Class;
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static INIT: Once = Once::new();
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INIT.call_once(|| unsafe {
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let superclass = class!(NSWindowController);
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let mut decl = ClassDecl::new("RSTWindowController", superclass).unwrap();
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decl.add_ivar::<usize>(WINDOW_DELEGATE_PTR);
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DELEGATE_CLASS = decl.register();
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});
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unsafe {
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DELEGATE_CLASS
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}
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}
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