b3-core 0.4.0

A cross-platform framework that provides access and management of the main elements of a graphical application.
Documentation 
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use objc2::rc::Retained;
use objc2_app_kit::NSImage;
use objc2_foundation::{MainThreadBound, MainThreadMarker, NSData, NSString};

use crate::{
    platform::{IconApi, Wrapper},
    ContextOwner,
    Error,
    IconType,
};

#[derive(Debug)]
pub(crate) struct IconImpl(MainThreadBound<Retained<NSImage>>);

impl IconImpl {
    #[inline]
    pub(super) fn get_native(&self, mtm: MainThreadMarker) -> &Retained<NSImage> { self.0.get(mtm) }
}

impl IconApi for IconImpl {
    #[inline]
    fn from_data(
        ctx: &impl ContextOwner,
        icon_data: &Vec<u8>,
        _icon_type: IconType,
    ) -> Result<Self, Error> {
        let mtm = ctx.context().get_impl().mtm();
        let allocated = mtm.alloc();

        let data = NSData::with_bytes(&icon_data);
        match NSImage::initWithData(allocated, &data) {
            Some(image) => Ok(Self(MainThreadBound::new(image, mtm))),
            None => Err(Error::new("NSImage not created.")),
        }
    }

    #[inline]
    fn from_str(ctx: &impl ContextOwner, title: &String) -> Result<Self, Error> {
        let mtm = ctx.context().get_impl().mtm();

        let name = NSString::from_str(title);
        match unsafe { NSImage::imageWithSystemSymbolName_accessibilityDescription(&name, None) } {
            Some(image) => Ok(Self(MainThreadBound::new(image, mtm))),
            None => Err(Error::new("NSImage not created.")),
        }
    }
}