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connection.rs
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connection.rs
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// let () = msg_send! is a common pattern for objc
#![allow(clippy::let_unit_value)]
use super::nsstring_to_str;
use super::window::WindowInner;
use crate::connection::ConnectionOps;
use crate::os::macos::app::create_app_delegate;
use crate::screen::{ScreenInfo, Screens};
use crate::spawn::*;
use crate::Appearance;
use cocoa::appkit::{NSApp, NSApplication, NSApplicationActivationPolicyRegular, NSScreen};
use cocoa::base::{id, nil};
use cocoa::foundation::{NSArray, NSInteger};
use objc::runtime::{Object, BOOL, YES};
use objc::*;
use serde::Deserialize;
use std::cell::RefCell;
use std::collections::HashMap;
use std::rc::Rc;
use std::sync::atomic::AtomicUsize;
pub struct Connection {
ns_app: id,
pub(crate) windows: RefCell<HashMap<usize, Rc<RefCell<WindowInner>>>>,
pub(crate) next_window_id: AtomicUsize,
pub(crate) gl_connection: RefCell<Option<Rc<crate::egl::GlConnection>>>,
}
impl Connection {
pub(crate) fn create_new() -> anyhow::Result<Self> {
// Ensure that the SPAWN_QUEUE is created; it will have nothing
// to run right now.
SPAWN_QUEUE.run();
unsafe {
let ns_app = NSApp();
ns_app.setActivationPolicy_(NSApplicationActivationPolicyRegular);
let delegate = create_app_delegate();
let () = msg_send![ns_app, setDelegate: delegate];
let conn = Self {
ns_app,
windows: RefCell::new(HashMap::new()),
next_window_id: AtomicUsize::new(1),
gl_connection: RefCell::new(None),
};
Ok(conn)
}
}
pub(crate) fn next_window_id(&self) -> usize {
self.next_window_id
.fetch_add(1, ::std::sync::atomic::Ordering::Relaxed)
}
pub(crate) fn window_by_id(&self, window_id: usize) -> Option<Rc<RefCell<WindowInner>>> {
self.windows.borrow().get(&window_id).map(Rc::clone)
}
pub(crate) fn with_window_inner<
R,
F: FnOnce(&mut WindowInner) -> anyhow::Result<R> + Send + 'static,
>(
window_id: usize,
f: F,
) -> promise::Future<R>
where
R: Send + 'static,
{
let mut prom = promise::Promise::new();
let future = prom.get_future().unwrap();
promise::spawn::spawn_into_main_thread(async move {
if let Some(handle) = Connection::get().unwrap().window_by_id(window_id) {
let mut inner = handle.borrow_mut();
prom.result(f(&mut inner));
}
})
.detach();
future
}
}
/// `/System/Library/CoreServices/SystemVersion.plist`
#[derive(Deserialize, Debug)]
#[serde(rename_all = "PascalCase")]
struct SoftwareVersion {
product_build_version: String,
product_user_visible_version: String,
product_name: String,
}
impl SoftwareVersion {
fn load() -> anyhow::Result<Self> {
let vers: Self = plist::from_file("/System/Library/CoreServices/SystemVersion.plist")?;
Ok(vers)
}
}
impl ConnectionOps for Connection {
fn name(&self) -> String {
if let Ok(vers) = SoftwareVersion::load() {
format!(
"{} {} ({})",
vers.product_name, vers.product_user_visible_version, vers.product_build_version
)
} else {
"macOS".to_string()
}
}
fn default_dpi(&self) -> f64 {
if let Ok(screens) = self.screens() {
screens.active.effective_dpi.unwrap_or(crate::DEFAULT_DPI)
} else {
crate::DEFAULT_DPI
}
}
fn terminate_message_loop(&self) {
unsafe {
// bounce via an event callback to encourage stop to apply
// to the correct level of run loop
promise::spawn::spawn_into_main_thread(async move {
let () = msg_send![NSApp(), stop: nil];
// Generate a UI event so that the run loop breaks out
// after receiving the stop
let () = msg_send![NSApp(), abortModal];
})
.detach();
}
}
fn get_appearance(&self) -> Appearance {
let name = unsafe {
let appearance: id = msg_send![self.ns_app, effectiveAppearance];
nsstring_to_str(msg_send![appearance, name])
};
log::debug!("NSAppearanceName is {name}");
match name {
"NSAppearanceNameVibrantDark" | "NSAppearanceNameDarkAqua" => Appearance::Dark,
"NSAppearanceNameVibrantLight" | "NSAppearanceNameAqua" => Appearance::Light,
"NSAppearanceNameAccessibilityHighContrastVibrantLight"
| "NSAppearanceNameAccessibilityHighContrastAqua" => Appearance::LightHighContrast,
"NSAppearanceNameAccessibilityHighContrastVibrantDark"
| "NSAppearanceNameAccessibilityHighContrastDarkAqua" => Appearance::DarkHighContrast,
_ => {
log::warn!("Unknown NSAppearanceName {name}, assume Light");
Appearance::Light
}
}
}
fn run_message_loop(&self) -> anyhow::Result<()> {
unsafe {
self.ns_app.run();
}
self.windows.borrow_mut().clear();
Ok(())
}
fn hide_application(&self) {
unsafe {
let () = msg_send![self.ns_app, hide: self.ns_app];
}
}
fn beep(&self) {
unsafe {
NSBeep();
}
}
fn screens(&self) -> anyhow::Result<Screens> {
let mut by_name = HashMap::new();
let mut virtual_rect = euclid::rect(0, 0, 0, 0);
let screens = unsafe { NSScreen::screens(nil) };
for idx in 0..unsafe { screens.count() } {
let screen = unsafe { screens.objectAtIndex(idx) };
let screen = nsscreen_to_screen_info(screen);
virtual_rect = virtual_rect.union(&screen.rect);
by_name.insert(screen.name.clone(), screen);
}
// The screen with the menu bar is always index 0
let main = nsscreen_to_screen_info(unsafe { screens.objectAtIndex(0) });
// The active screen is known as the "main" screen in macOS
let active = nsscreen_to_screen_info(unsafe { NSScreen::mainScreen(nil) });
Ok(Screens {
by_name,
active,
main,
virtual_rect,
})
}
}
pub fn nsscreen_to_screen_info(screen: *mut Object) -> ScreenInfo {
let frame = unsafe { NSScreen::frame(screen) };
let backing_frame = unsafe { NSScreen::convertRectToBacking_(screen, frame) };
let rect = euclid::rect(
backing_frame.origin.x as isize,
backing_frame.origin.y as isize,
backing_frame.size.width as isize,
backing_frame.size.height as isize,
);
let has_name: BOOL = unsafe { msg_send!(screen, respondsToSelector: sel!(localizedName)) };
let name = if has_name == YES {
unsafe { nsstring_to_str(msg_send!(screen, localizedName)) }.to_string()
} else {
format!(
"{}x{}@{},{}",
backing_frame.size.width,
backing_frame.size.height,
backing_frame.origin.x,
backing_frame.origin.y
)
};
let has_max_fps: BOOL =
unsafe { msg_send!(screen, respondsToSelector: sel!(maximumFramesPerSecond)) };
let max_fps = if has_max_fps == YES {
let max_fps: NSInteger = unsafe { msg_send!(screen, maximumFramesPerSecond) };
Some(max_fps as usize)
} else {
None
};
let scale = backing_frame.size.width / frame.size.width;
let config = config::configuration();
let effective_dpi = if let Some(dpi) = config.dpi_by_screen.get(&name).copied() {
Some(dpi)
} else if let Some(dpi) = config.dpi {
Some(dpi)
} else {
Some(crate::DEFAULT_DPI * scale)
};
ScreenInfo {
name,
rect,
scale,
max_fps,
effective_dpi,
}
}
extern "C" {
fn NSBeep();
}