1use crate::{
2 executor,
3 geometry::{
4 rect::RectF,
5 vector::{vec2f, Vector2F},
6 },
7 keymap::Keystroke,
8 platform::{self, Event, WindowBounds, WindowContext},
9 Scene,
10};
11use block::ConcreteBlock;
12use cocoa::{
13 appkit::{
14 CGPoint, NSApplication, NSBackingStoreBuffered, NSScreen, NSView, NSViewHeightSizable,
15 NSViewWidthSizable, NSWindow, NSWindowButton, NSWindowStyleMask,
16 },
17 base::{id, nil},
18 foundation::{NSAutoreleasePool, NSInteger, NSSize, NSString},
19 quartzcore::AutoresizingMask,
20};
21use core_graphics::display::CGRect;
22use ctor::ctor;
23use foreign_types::ForeignType as _;
24use objc::{
25 class,
26 declare::ClassDecl,
27 msg_send,
28 runtime::{Class, Object, Protocol, Sel, BOOL, NO, YES},
29 sel, sel_impl,
30};
31use postage::oneshot;
32use smol::Timer;
33use std::{
34 any::Any,
35 cell::{Cell, RefCell},
36 convert::TryInto,
37 ffi::c_void,
38 mem, ptr,
39 rc::{Rc, Weak},
40 sync::Arc,
41 time::Duration,
42};
43
44use super::{geometry::RectFExt, renderer::Renderer};
45
46const WINDOW_STATE_IVAR: &'static str = "windowState";
47
48static mut WINDOW_CLASS: *const Class = ptr::null();
49static mut VIEW_CLASS: *const Class = ptr::null();
50
51#[allow(non_upper_case_globals)]
52const NSViewLayerContentsRedrawDuringViewResize: NSInteger = 2;
53
54#[ctor]
55unsafe fn build_classes() {
56 WINDOW_CLASS = {
57 let mut decl = ClassDecl::new("GPUIWindow", class!(NSWindow)).unwrap();
58 decl.add_ivar::<*mut c_void>(WINDOW_STATE_IVAR);
59 decl.add_method(sel!(dealloc), dealloc_window as extern "C" fn(&Object, Sel));
60 decl.add_method(
61 sel!(canBecomeMainWindow),
62 yes as extern "C" fn(&Object, Sel) -> BOOL,
63 );
64 decl.add_method(
65 sel!(canBecomeKeyWindow),
66 yes as extern "C" fn(&Object, Sel) -> BOOL,
67 );
68 decl.add_method(
69 sel!(sendEvent:),
70 send_event as extern "C" fn(&Object, Sel, id),
71 );
72 decl.add_method(
73 sel!(windowDidResize:),
74 window_did_resize as extern "C" fn(&Object, Sel, id),
75 );
76 decl.add_method(
77 sel!(windowDidBecomeKey:),
78 window_did_change_key_status as extern "C" fn(&Object, Sel, id),
79 );
80 decl.add_method(
81 sel!(windowDidResignKey:),
82 window_did_change_key_status as extern "C" fn(&Object, Sel, id),
83 );
84 decl.add_method(
85 sel!(windowShouldClose:),
86 window_should_close as extern "C" fn(&Object, Sel, id) -> BOOL,
87 );
88 decl.add_method(sel!(close), close_window as extern "C" fn(&Object, Sel));
89 decl.register()
90 };
91
92 VIEW_CLASS = {
93 let mut decl = ClassDecl::new("GPUIView", class!(NSView)).unwrap();
94 decl.add_ivar::<*mut c_void>(WINDOW_STATE_IVAR);
95
96 decl.add_method(sel!(dealloc), dealloc_view as extern "C" fn(&Object, Sel));
97
98 decl.add_method(
99 sel!(performKeyEquivalent:),
100 handle_key_equivalent as extern "C" fn(&Object, Sel, id) -> BOOL,
101 );
102 decl.add_method(
103 sel!(mouseDown:),
104 handle_view_event as extern "C" fn(&Object, Sel, id),
105 );
106 decl.add_method(
107 sel!(mouseUp:),
108 handle_view_event as extern "C" fn(&Object, Sel, id),
109 );
110 decl.add_method(
111 sel!(rightMouseDown:),
112 handle_view_event as extern "C" fn(&Object, Sel, id),
113 );
114 decl.add_method(
115 sel!(rightMouseUp:),
116 handle_view_event as extern "C" fn(&Object, Sel, id),
117 );
118 decl.add_method(
119 sel!(otherMouseDown:),
120 handle_view_event as extern "C" fn(&Object, Sel, id),
121 );
122 decl.add_method(
123 sel!(otherMouseUp:),
124 handle_view_event as extern "C" fn(&Object, Sel, id),
125 );
126 decl.add_method(
127 sel!(mouseMoved:),
128 handle_view_event as extern "C" fn(&Object, Sel, id),
129 );
130 decl.add_method(
131 sel!(mouseDragged:),
132 handle_view_event as extern "C" fn(&Object, Sel, id),
133 );
134 decl.add_method(
135 sel!(scrollWheel:),
136 handle_view_event as extern "C" fn(&Object, Sel, id),
137 );
138 decl.add_method(
139 sel!(flagsChanged:),
140 handle_view_event as extern "C" fn(&Object, Sel, id),
141 );
142 decl.add_method(
143 sel!(cancelOperation:),
144 cancel_operation as extern "C" fn(&Object, Sel, id),
145 );
146
147 decl.add_method(
148 sel!(makeBackingLayer),
149 make_backing_layer as extern "C" fn(&Object, Sel) -> id,
150 );
151
152 decl.add_protocol(Protocol::get("CALayerDelegate").unwrap());
153 decl.add_method(
154 sel!(viewDidChangeBackingProperties),
155 view_did_change_backing_properties as extern "C" fn(&Object, Sel),
156 );
157 decl.add_method(
158 sel!(setFrameSize:),
159 set_frame_size as extern "C" fn(&Object, Sel, NSSize),
160 );
161 decl.add_method(
162 sel!(displayLayer:),
163 display_layer as extern "C" fn(&Object, Sel, id),
164 );
165
166 decl.register()
167 };
168}
169
170pub struct Window(Rc<RefCell<WindowState>>);
171
172struct WindowState {
173 id: usize,
174 native_window: id,
175 event_callback: Option<Box<dyn FnMut(Event) -> bool>>,
176 activate_callback: Option<Box<dyn FnMut(bool)>>,
177 resize_callback: Option<Box<dyn FnMut()>>,
178 should_close_callback: Option<Box<dyn FnMut() -> bool>>,
179 close_callback: Option<Box<dyn FnOnce()>>,
180 synthetic_drag_counter: usize,
181 executor: Rc<executor::Foreground>,
182 scene_to_render: Option<Scene>,
183 renderer: Renderer,
184 command_queue: metal::CommandQueue,
185 last_fresh_keydown: Option<(Keystroke, Option<String>)>,
186 layer: id,
187 traffic_light_position: Option<Vector2F>,
188 previous_modifiers_changed_event: Option<Event>,
189}
190
191impl Window {
192 pub fn open(
193 id: usize,
194 options: platform::WindowOptions,
195 executor: Rc<executor::Foreground>,
196 fonts: Arc<dyn platform::FontSystem>,
197 ) -> Self {
198 const PIXEL_FORMAT: metal::MTLPixelFormat = metal::MTLPixelFormat::BGRA8Unorm;
199
200 unsafe {
201 let pool = NSAutoreleasePool::new(nil);
202
203 let frame = match options.bounds {
204 WindowBounds::Maximized => RectF::new(Default::default(), vec2f(1024., 768.)),
205 WindowBounds::Fixed(rect) => rect,
206 }
207 .to_ns_rect();
208 let mut style_mask = NSWindowStyleMask::NSClosableWindowMask
209 | NSWindowStyleMask::NSMiniaturizableWindowMask
210 | NSWindowStyleMask::NSResizableWindowMask
211 | NSWindowStyleMask::NSTitledWindowMask;
212
213 if options.titlebar_appears_transparent {
214 style_mask |= NSWindowStyleMask::NSFullSizeContentViewWindowMask;
215 }
216
217 let native_window: id = msg_send![WINDOW_CLASS, alloc];
218 let native_window = native_window.initWithContentRect_styleMask_backing_defer_(
219 frame,
220 style_mask,
221 NSBackingStoreBuffered,
222 NO,
223 );
224 assert!(!native_window.is_null());
225
226 if matches!(options.bounds, WindowBounds::Maximized) {
227 let screen = native_window.screen();
228 native_window.setFrame_display_(screen.visibleFrame(), YES);
229 }
230
231 let device =
232 metal::Device::system_default().expect("could not find default metal device");
233
234 let layer: id = msg_send![class!(CAMetalLayer), layer];
235 let _: () = msg_send![layer, setDevice: device.as_ptr()];
236 let _: () = msg_send![layer, setPixelFormat: PIXEL_FORMAT];
237 let _: () = msg_send![layer, setAllowsNextDrawableTimeout: NO];
238 let _: () = msg_send![layer, setNeedsDisplayOnBoundsChange: YES];
239 let _: () = msg_send![layer, setPresentsWithTransaction: YES];
240 let _: () = msg_send![
241 layer,
242 setAutoresizingMask: AutoresizingMask::WIDTH_SIZABLE
243 | AutoresizingMask::HEIGHT_SIZABLE
244 ];
245
246 let native_view: id = msg_send![VIEW_CLASS, alloc];
247 let native_view = NSView::init(native_view);
248 assert!(!native_view.is_null());
249
250 let window = Self(Rc::new(RefCell::new(WindowState {
251 id,
252 native_window,
253 event_callback: None,
254 resize_callback: None,
255 should_close_callback: None,
256 close_callback: None,
257 activate_callback: None,
258 synthetic_drag_counter: 0,
259 executor,
260 scene_to_render: Default::default(),
261 renderer: Renderer::new(
262 device.clone(),
263 PIXEL_FORMAT,
264 get_scale_factor(native_window),
265 fonts,
266 ),
267 command_queue: device.new_command_queue(),
268 last_fresh_keydown: None,
269 layer,
270 traffic_light_position: options.traffic_light_position,
271 previous_modifiers_changed_event: None,
272 })));
273
274 (*native_window).set_ivar(
275 WINDOW_STATE_IVAR,
276 Rc::into_raw(window.0.clone()) as *const c_void,
277 );
278 native_window.setDelegate_(native_window);
279 (*native_view).set_ivar(
280 WINDOW_STATE_IVAR,
281 Rc::into_raw(window.0.clone()) as *const c_void,
282 );
283
284 if let Some(title) = options.title.as_ref() {
285 native_window.setTitle_(NSString::alloc(nil).init_str(title));
286 }
287 if options.titlebar_appears_transparent {
288 native_window.setTitlebarAppearsTransparent_(YES);
289 }
290 native_window.setAcceptsMouseMovedEvents_(YES);
291
292 native_view.setAutoresizingMask_(NSViewWidthSizable | NSViewHeightSizable);
293 native_view.setWantsBestResolutionOpenGLSurface_(YES);
294
295 // From winit crate: On Mojave, views automatically become layer-backed shortly after
296 // being added to a native_window. Changing the layer-backedness of a view breaks the
297 // association between the view and its associated OpenGL context. To work around this,
298 // on we explicitly make the view layer-backed up front so that AppKit doesn't do it
299 // itself and break the association with its context.
300 native_view.setWantsLayer(YES);
301 let _: () = msg_send![
302 native_view,
303 setLayerContentsRedrawPolicy: NSViewLayerContentsRedrawDuringViewResize
304 ];
305
306 native_window.setContentView_(native_view.autorelease());
307 native_window.makeFirstResponder_(native_view);
308
309 native_window.center();
310 native_window.makeKeyAndOrderFront_(nil);
311
312 window.0.borrow().move_traffic_light();
313 pool.drain();
314
315 window
316 }
317 }
318
319 pub fn key_window_id() -> Option<usize> {
320 unsafe {
321 let app = NSApplication::sharedApplication(nil);
322 let key_window: id = msg_send![app, keyWindow];
323 if msg_send![key_window, isKindOfClass: WINDOW_CLASS] {
324 let id = get_window_state(&*key_window).borrow().id;
325 Some(id)
326 } else {
327 None
328 }
329 }
330 }
331}
332
333impl Drop for Window {
334 fn drop(&mut self) {
335 unsafe {
336 self.0.as_ref().borrow().native_window.close();
337 }
338 }
339}
340
341impl platform::Window for Window {
342 fn as_any_mut(&mut self) -> &mut dyn Any {
343 self
344 }
345
346 fn on_event(&mut self, callback: Box<dyn FnMut(Event) -> bool>) {
347 self.0.as_ref().borrow_mut().event_callback = Some(callback);
348 }
349
350 fn on_resize(&mut self, callback: Box<dyn FnMut()>) {
351 self.0.as_ref().borrow_mut().resize_callback = Some(callback);
352 }
353
354 fn on_should_close(&mut self, callback: Box<dyn FnMut() -> bool>) {
355 self.0.as_ref().borrow_mut().should_close_callback = Some(callback);
356 }
357
358 fn on_close(&mut self, callback: Box<dyn FnOnce()>) {
359 self.0.as_ref().borrow_mut().close_callback = Some(callback);
360 }
361
362 fn on_active_status_change(&mut self, callback: Box<dyn FnMut(bool)>) {
363 self.0.as_ref().borrow_mut().activate_callback = Some(callback);
364 }
365
366 fn prompt(
367 &self,
368 level: platform::PromptLevel,
369 msg: &str,
370 answers: &[&str],
371 ) -> oneshot::Receiver<usize> {
372 unsafe {
373 let alert: id = msg_send![class!(NSAlert), alloc];
374 let alert: id = msg_send![alert, init];
375 let alert_style = match level {
376 platform::PromptLevel::Info => 1,
377 platform::PromptLevel::Warning => 0,
378 platform::PromptLevel::Critical => 2,
379 };
380 let _: () = msg_send![alert, setAlertStyle: alert_style];
381 let _: () = msg_send![alert, setMessageText: ns_string(msg)];
382 for (ix, answer) in answers.into_iter().enumerate() {
383 let button: id = msg_send![alert, addButtonWithTitle: ns_string(answer)];
384 let _: () = msg_send![button, setTag: ix as NSInteger];
385 }
386 let (done_tx, done_rx) = oneshot::channel();
387 let done_tx = Cell::new(Some(done_tx));
388 let block = ConcreteBlock::new(move |answer: NSInteger| {
389 if let Some(mut done_tx) = done_tx.take() {
390 let _ = postage::sink::Sink::try_send(&mut done_tx, answer.try_into().unwrap());
391 }
392 });
393 let block = block.copy();
394 let native_window = self.0.borrow().native_window;
395 let _: () = msg_send![
396 alert,
397 beginSheetModalForWindow: native_window
398 completionHandler: block
399 ];
400 done_rx
401 }
402 }
403
404 fn activate(&self) {
405 unsafe { msg_send![self.0.borrow().native_window, makeKeyAndOrderFront: nil] }
406 }
407
408 fn set_title(&mut self, title: &str) {
409 unsafe {
410 let app = NSApplication::sharedApplication(nil);
411 let window = self.0.borrow().native_window;
412 let title = ns_string(title);
413 msg_send![app, changeWindowsItem:window title:title filename:false]
414 }
415 }
416
417 fn set_edited(&mut self, edited: bool) {
418 unsafe {
419 let window = self.0.borrow().native_window;
420 msg_send![window, setDocumentEdited: edited as BOOL]
421 }
422
423 // Changing the document edited state resets the traffic light position,
424 // so we have to move it again.
425 self.0.borrow().move_traffic_light();
426 }
427}
428
429impl platform::WindowContext for Window {
430 fn size(&self) -> Vector2F {
431 self.0.as_ref().borrow().size()
432 }
433
434 fn scale_factor(&self) -> f32 {
435 self.0.as_ref().borrow().scale_factor()
436 }
437
438 fn present_scene(&mut self, scene: Scene) {
439 self.0.as_ref().borrow_mut().present_scene(scene);
440 }
441
442 fn titlebar_height(&self) -> f32 {
443 self.0.as_ref().borrow().titlebar_height()
444 }
445}
446
447impl WindowState {
448 fn move_traffic_light(&self) {
449 if let Some(traffic_light_position) = self.traffic_light_position {
450 let titlebar_height = self.titlebar_height();
451
452 unsafe {
453 let close_button: id = msg_send![
454 self.native_window,
455 standardWindowButton: NSWindowButton::NSWindowCloseButton
456 ];
457 let min_button: id = msg_send![
458 self.native_window,
459 standardWindowButton: NSWindowButton::NSWindowMiniaturizeButton
460 ];
461 let zoom_button: id = msg_send![
462 self.native_window,
463 standardWindowButton: NSWindowButton::NSWindowZoomButton
464 ];
465
466 let mut close_button_frame: CGRect = msg_send![close_button, frame];
467 let mut min_button_frame: CGRect = msg_send![min_button, frame];
468 let mut zoom_button_frame: CGRect = msg_send![zoom_button, frame];
469 let mut origin = vec2f(
470 traffic_light_position.x(),
471 titlebar_height
472 - traffic_light_position.y()
473 - close_button_frame.size.height as f32,
474 );
475 let button_spacing =
476 (min_button_frame.origin.x - close_button_frame.origin.x) as f32;
477
478 close_button_frame.origin = CGPoint::new(origin.x() as f64, origin.y() as f64);
479 let _: () = msg_send![close_button, setFrame: close_button_frame];
480 origin.set_x(origin.x() + button_spacing);
481
482 min_button_frame.origin = CGPoint::new(origin.x() as f64, origin.y() as f64);
483 let _: () = msg_send![min_button, setFrame: min_button_frame];
484 origin.set_x(origin.x() + button_spacing);
485
486 zoom_button_frame.origin = CGPoint::new(origin.x() as f64, origin.y() as f64);
487 let _: () = msg_send![zoom_button, setFrame: zoom_button_frame];
488 }
489 }
490 }
491}
492
493impl platform::WindowContext for WindowState {
494 fn size(&self) -> Vector2F {
495 let NSSize { width, height, .. } =
496 unsafe { NSView::frame(self.native_window.contentView()) }.size;
497 vec2f(width as f32, height as f32)
498 }
499
500 fn scale_factor(&self) -> f32 {
501 get_scale_factor(self.native_window)
502 }
503
504 fn titlebar_height(&self) -> f32 {
505 unsafe {
506 let frame = NSWindow::frame(self.native_window);
507 let content_layout_rect: CGRect = msg_send![self.native_window, contentLayoutRect];
508 (frame.size.height - content_layout_rect.size.height) as f32
509 }
510 }
511
512 fn present_scene(&mut self, scene: Scene) {
513 self.scene_to_render = Some(scene);
514 unsafe {
515 let _: () = msg_send![self.native_window.contentView(), setNeedsDisplay: YES];
516 }
517 }
518}
519
520fn get_scale_factor(native_window: id) -> f32 {
521 unsafe {
522 let screen: id = msg_send![native_window, screen];
523 NSScreen::backingScaleFactor(screen) as f32
524 }
525}
526
527unsafe fn get_window_state(object: &Object) -> Rc<RefCell<WindowState>> {
528 let raw: *mut c_void = *object.get_ivar(WINDOW_STATE_IVAR);
529 let rc1 = Rc::from_raw(raw as *mut RefCell<WindowState>);
530 let rc2 = rc1.clone();
531 mem::forget(rc1);
532 rc2
533}
534
535unsafe fn drop_window_state(object: &Object) {
536 let raw: *mut c_void = *object.get_ivar(WINDOW_STATE_IVAR);
537 Rc::from_raw(raw as *mut RefCell<WindowState>);
538}
539
540extern "C" fn yes(_: &Object, _: Sel) -> BOOL {
541 YES
542}
543
544extern "C" fn dealloc_window(this: &Object, _: Sel) {
545 unsafe {
546 drop_window_state(this);
547 let () = msg_send![super(this, class!(NSWindow)), dealloc];
548 }
549}
550
551extern "C" fn dealloc_view(this: &Object, _: Sel) {
552 unsafe {
553 drop_window_state(this);
554 let () = msg_send![super(this, class!(NSView)), dealloc];
555 }
556}
557
558extern "C" fn handle_key_equivalent(this: &Object, _: Sel, native_event: id) -> BOOL {
559 let window_state = unsafe { get_window_state(this) };
560 let mut window_state_borrow = window_state.as_ref().borrow_mut();
561
562 let event = unsafe { Event::from_native(native_event, Some(window_state_borrow.size().y())) };
563 if let Some(event) = event {
564 match &event {
565 Event::KeyDown {
566 keystroke,
567 input,
568 is_held,
569 } => {
570 let keydown = (keystroke.clone(), input.clone());
571 // Ignore events from held-down keys after some of the initially-pressed keys
572 // were released.
573 if *is_held {
574 if window_state_borrow.last_fresh_keydown.as_ref() != Some(&keydown) {
575 return YES;
576 }
577 } else {
578 window_state_borrow.last_fresh_keydown = Some(keydown);
579 }
580 }
581 _ => return NO,
582 }
583
584 if let Some(mut callback) = window_state_borrow.event_callback.take() {
585 drop(window_state_borrow);
586 let handled = callback(event);
587 window_state.borrow_mut().event_callback = Some(callback);
588 handled as BOOL
589 } else {
590 NO
591 }
592 } else {
593 NO
594 }
595}
596
597extern "C" fn handle_view_event(this: &Object, _: Sel, native_event: id) {
598 let window_state = unsafe { get_window_state(this) };
599 let weak_window_state = Rc::downgrade(&window_state);
600 let mut window_state_borrow = window_state.as_ref().borrow_mut();
601
602 let event = unsafe { Event::from_native(native_event, Some(window_state_borrow.size().y())) };
603
604 if let Some(event) = event {
605 match &event {
606 Event::LeftMouseDragged { position, .. } => {
607 window_state_borrow.synthetic_drag_counter += 1;
608 window_state_borrow
609 .executor
610 .spawn(synthetic_drag(
611 weak_window_state,
612 window_state_borrow.synthetic_drag_counter,
613 *position,
614 ))
615 .detach();
616 }
617 Event::LeftMouseUp { .. } => {
618 window_state_borrow.synthetic_drag_counter += 1;
619 }
620 Event::ModifiersChanged {
621 ctrl,
622 alt,
623 shift,
624 cmd,
625 } => {
626 // Only raise modifiers changed event when they have actually changed
627 if let Some(Event::ModifiersChanged {
628 ctrl: prev_ctrl,
629 alt: prev_alt,
630 shift: prev_shift,
631 cmd: prev_cmd,
632 }) = &window_state_borrow.previous_modifiers_changed_event
633 {
634 if prev_ctrl == ctrl
635 && prev_alt == alt
636 && prev_shift == shift
637 && prev_cmd == cmd
638 {
639 return;
640 }
641 }
642
643 window_state_borrow.previous_modifiers_changed_event = Some(event.clone());
644 }
645 _ => {}
646 }
647
648 if let Some(mut callback) = window_state_borrow.event_callback.take() {
649 drop(window_state_borrow);
650 callback(event);
651 window_state.borrow_mut().event_callback = Some(callback);
652 }
653 }
654}
655
656// Allows us to receive `cmd-.` (the shortcut for closing a dialog)
657// https://bugs.eclipse.org/bugs/show_bug.cgi?id=300620#c6
658extern "C" fn cancel_operation(this: &Object, _sel: Sel, _sender: id) {
659 let window_state = unsafe { get_window_state(this) };
660 let mut window_state_borrow = window_state.as_ref().borrow_mut();
661
662 let chars = ".".to_string();
663 let keystroke = Keystroke {
664 cmd: true,
665 ctrl: false,
666 alt: false,
667 shift: false,
668 key: chars.clone(),
669 };
670 let event = Event::KeyDown {
671 keystroke: keystroke.clone(),
672 input: Some(chars.clone()),
673 is_held: false,
674 };
675
676 window_state_borrow.last_fresh_keydown = Some((keystroke, Some(chars)));
677 if let Some(mut callback) = window_state_borrow.event_callback.take() {
678 drop(window_state_borrow);
679 callback(event);
680 window_state.borrow_mut().event_callback = Some(callback);
681 }
682}
683
684extern "C" fn send_event(this: &Object, _: Sel, native_event: id) {
685 unsafe {
686 let () = msg_send![super(this, class!(NSWindow)), sendEvent: native_event];
687 }
688}
689
690extern "C" fn window_did_resize(this: &Object, _: Sel, _: id) {
691 let window_state = unsafe { get_window_state(this) };
692 window_state.as_ref().borrow().move_traffic_light();
693}
694
695extern "C" fn window_did_change_key_status(this: &Object, selector: Sel, _: id) {
696 let is_active = if selector == sel!(windowDidBecomeKey:) {
697 true
698 } else if selector == sel!(windowDidResignKey:) {
699 false
700 } else {
701 unreachable!();
702 };
703
704 let window_state = unsafe { get_window_state(this) };
705 let executor = window_state.as_ref().borrow().executor.clone();
706 executor
707 .spawn(async move {
708 let mut window_state_borrow = window_state.as_ref().borrow_mut();
709 if let Some(mut callback) = window_state_borrow.activate_callback.take() {
710 drop(window_state_borrow);
711 callback(is_active);
712 window_state.borrow_mut().activate_callback = Some(callback);
713 };
714 })
715 .detach();
716}
717
718extern "C" fn window_should_close(this: &Object, _: Sel, _: id) -> BOOL {
719 let window_state = unsafe { get_window_state(this) };
720 let mut window_state_borrow = window_state.as_ref().borrow_mut();
721 if let Some(mut callback) = window_state_borrow.should_close_callback.take() {
722 drop(window_state_borrow);
723 let should_close = callback();
724 window_state.borrow_mut().should_close_callback = Some(callback);
725 should_close as BOOL
726 } else {
727 YES
728 }
729}
730
731extern "C" fn close_window(this: &Object, _: Sel) {
732 unsafe {
733 let close_callback = {
734 let window_state = get_window_state(this);
735 window_state
736 .as_ref()
737 .try_borrow_mut()
738 .ok()
739 .and_then(|mut window_state| window_state.close_callback.take())
740 };
741
742 if let Some(callback) = close_callback {
743 callback();
744 }
745
746 let () = msg_send![super(this, class!(NSWindow)), close];
747 }
748}
749
750extern "C" fn make_backing_layer(this: &Object, _: Sel) -> id {
751 let window_state = unsafe { get_window_state(this) };
752 let window_state = window_state.as_ref().borrow();
753 window_state.layer
754}
755
756extern "C" fn view_did_change_backing_properties(this: &Object, _: Sel) {
757 let window_state = unsafe { get_window_state(this) };
758 let mut window_state_borrow = window_state.as_ref().borrow_mut();
759
760 unsafe {
761 let scale_factor = window_state_borrow.scale_factor() as f64;
762 let size = window_state_borrow.size();
763 let drawable_size: NSSize = NSSize {
764 width: size.x() as f64 * scale_factor,
765 height: size.y() as f64 * scale_factor,
766 };
767
768 let _: () = msg_send![window_state_borrow.layer, setContentsScale: scale_factor];
769 let _: () = msg_send![window_state_borrow.layer, setDrawableSize: drawable_size];
770 }
771
772 if let Some(mut callback) = window_state_borrow.resize_callback.take() {
773 drop(window_state_borrow);
774 callback();
775 window_state.as_ref().borrow_mut().resize_callback = Some(callback);
776 };
777}
778
779extern "C" fn set_frame_size(this: &Object, _: Sel, size: NSSize) {
780 let window_state = unsafe { get_window_state(this) };
781 let mut window_state_borrow = window_state.as_ref().borrow_mut();
782
783 if window_state_borrow.size() == vec2f(size.width as f32, size.height as f32) {
784 return;
785 }
786
787 unsafe {
788 let _: () = msg_send![super(this, class!(NSView)), setFrameSize: size];
789 }
790
791 let scale_factor = window_state_borrow.scale_factor() as f64;
792 let drawable_size: NSSize = NSSize {
793 width: size.width * scale_factor,
794 height: size.height * scale_factor,
795 };
796
797 unsafe {
798 let _: () = msg_send![window_state_borrow.layer, setDrawableSize: drawable_size];
799 }
800
801 if let Some(mut callback) = window_state_borrow.resize_callback.take() {
802 drop(window_state_borrow);
803 callback();
804 window_state.borrow_mut().resize_callback = Some(callback);
805 };
806}
807
808extern "C" fn display_layer(this: &Object, _: Sel, _: id) {
809 unsafe {
810 let window_state = get_window_state(this);
811 let mut window_state = window_state.as_ref().borrow_mut();
812
813 if let Some(scene) = window_state.scene_to_render.take() {
814 let drawable: &metal::MetalDrawableRef = msg_send![window_state.layer, nextDrawable];
815 let command_queue = window_state.command_queue.clone();
816 let command_buffer = command_queue.new_command_buffer();
817
818 let size = window_state.size();
819 let scale_factor = window_state.scale_factor();
820
821 window_state.renderer.render(
822 &scene,
823 size * scale_factor,
824 command_buffer,
825 drawable.texture(),
826 );
827
828 command_buffer.commit();
829 command_buffer.wait_until_completed();
830 drawable.present();
831 };
832 }
833}
834
835async fn synthetic_drag(
836 window_state: Weak<RefCell<WindowState>>,
837 drag_id: usize,
838 position: Vector2F,
839) {
840 loop {
841 Timer::after(Duration::from_millis(16)).await;
842 if let Some(window_state) = window_state.upgrade() {
843 let mut window_state_borrow = window_state.borrow_mut();
844 if window_state_borrow.synthetic_drag_counter == drag_id {
845 if let Some(mut callback) = window_state_borrow.event_callback.take() {
846 drop(window_state_borrow);
847 callback(Event::LeftMouseDragged {
848 // TODO: Make sure empty modifiers is correct for this
849 position,
850 shift: false,
851 ctrl: false,
852 alt: false,
853 cmd: false,
854 });
855 window_state.borrow_mut().event_callback = Some(callback);
856 }
857 } else {
858 break;
859 }
860 }
861 }
862}
863
864unsafe fn ns_string(string: &str) -> id {
865 NSString::alloc(nil).init_str(string).autorelease()
866}