winit/src/platform/macos/monitor.rs

use core_graphics::display;
use std::collections::VecDeque;
use super::EventsLoop;

#[derive(Clone)]
pub struct MonitorId(u32);

impl EventsLoop {
    pub fn get_available_monitors(&self) -> VecDeque<MonitorId> {
        let mut monitors = VecDeque::new();
        unsafe {
            let max_displays = 10u32;
            let mut active_displays = [0u32; 10];
            let mut display_count = 0;
            display::CGGetActiveDisplayList(max_displays, &mut active_displays[0], &mut display_count);
            for i in 0..display_count as usize {
                monitors.push_back(MonitorId(active_displays[i]));
            }
        }
        monitors
    }

    #[inline]
    pub fn get_primary_monitor(&self) -> MonitorId {
        let id = unsafe { MonitorId(display::CGMainDisplayID()) };
        id
    }
}

impl MonitorId {
    pub fn get_name(&self) -> Option<String> {
        let MonitorId(display_id) = *self;
        let screen_num = unsafe { display::CGDisplayModelNumber(display_id) };
        Some(format!("Monitor #{}", screen_num))
    }

    #[inline]
    pub fn get_native_identifier(&self) -> u32 {
        self.0
    }

    pub fn get_dimensions(&self) -> (u32, u32) {
        let MonitorId(display_id) = *self;
        let dimension = unsafe {
            let height = display::CGDisplayPixelsHigh(display_id);
            let width = display::CGDisplayPixelsWide(display_id);
            (width as u32, height as u32)
        };
        dimension
    }

    #[inline]
    pub fn get_position(&self) -> (i32, i32) {
        unimplemented!()
    }

    #[inline]
    pub fn get_hidpi_factor(&self) -> f32 {
        1.0
    }
}