1use crate::{
2 executor,
3 geometry::{
4 rect::RectF,
5 vector::{vec2f, Vector2F},
6 },
7 keymap::Keystroke,
8 platform::{self, Event, WindowBounds, WindowContext},
9 KeyDownEvent, ModifiersChangedEvent, MouseButton, MouseEvent, MouseMovedEvent, Scene,
10};
11use block::ConcreteBlock;
12use cocoa::{
13 appkit::{
14 CGPoint, NSApplication, NSBackingStoreBuffered, NSModalResponse, NSScreen, NSView,
15 NSViewHeightSizable, 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 = if let Some(device) = metal::Device::system_default() {
232 device
233 } else {
234 let alert: id = msg_send![class!(NSAlert), alloc];
235 let _: () = msg_send![alert, init];
236 let _: () = msg_send![alert, setAlertStyle: 2];
237 let _: () = msg_send![alert, setMessageText: ns_string("Unable to access a compatible graphics device")];
238 let _: NSModalResponse = msg_send![alert, runModal];
239 std::process::exit(1);
240 };
241
242 let layer: id = msg_send![class!(CAMetalLayer), layer];
243 let _: () = msg_send![layer, setDevice: device.as_ptr()];
244 let _: () = msg_send![layer, setPixelFormat: PIXEL_FORMAT];
245 let _: () = msg_send![layer, setAllowsNextDrawableTimeout: NO];
246 let _: () = msg_send![layer, setNeedsDisplayOnBoundsChange: YES];
247 let _: () = msg_send![layer, setPresentsWithTransaction: YES];
248 let _: () = msg_send![
249 layer,
250 setAutoresizingMask: AutoresizingMask::WIDTH_SIZABLE
251 | AutoresizingMask::HEIGHT_SIZABLE
252 ];
253
254 let native_view: id = msg_send![VIEW_CLASS, alloc];
255 let native_view = NSView::init(native_view);
256 assert!(!native_view.is_null());
257
258 let window = Self(Rc::new(RefCell::new(WindowState {
259 id,
260 native_window,
261 event_callback: None,
262 resize_callback: None,
263 should_close_callback: None,
264 close_callback: None,
265 activate_callback: None,
266 synthetic_drag_counter: 0,
267 executor,
268 scene_to_render: Default::default(),
269 renderer: Renderer::new(
270 device.clone(),
271 PIXEL_FORMAT,
272 get_scale_factor(native_window),
273 fonts,
274 ),
275 command_queue: device.new_command_queue(),
276 last_fresh_keydown: None,
277 layer,
278 traffic_light_position: options.traffic_light_position,
279 previous_modifiers_changed_event: None,
280 })));
281
282 (*native_window).set_ivar(
283 WINDOW_STATE_IVAR,
284 Rc::into_raw(window.0.clone()) as *const c_void,
285 );
286 native_window.setDelegate_(native_window);
287 (*native_view).set_ivar(
288 WINDOW_STATE_IVAR,
289 Rc::into_raw(window.0.clone()) as *const c_void,
290 );
291
292 if let Some(title) = options.title.as_ref() {
293 native_window.setTitle_(NSString::alloc(nil).init_str(title));
294 }
295 if options.titlebar_appears_transparent {
296 native_window.setTitlebarAppearsTransparent_(YES);
297 }
298 native_window.setAcceptsMouseMovedEvents_(YES);
299
300 native_view.setAutoresizingMask_(NSViewWidthSizable | NSViewHeightSizable);
301 native_view.setWantsBestResolutionOpenGLSurface_(YES);
302
303 // From winit crate: On Mojave, views automatically become layer-backed shortly after
304 // being added to a native_window. Changing the layer-backedness of a view breaks the
305 // association between the view and its associated OpenGL context. To work around this,
306 // on we explicitly make the view layer-backed up front so that AppKit doesn't do it
307 // itself and break the association with its context.
308 native_view.setWantsLayer(YES);
309 let _: () = msg_send![
310 native_view,
311 setLayerContentsRedrawPolicy: NSViewLayerContentsRedrawDuringViewResize
312 ];
313
314 native_window.setContentView_(native_view.autorelease());
315 native_window.makeFirstResponder_(native_view);
316
317 native_window.center();
318 native_window.makeKeyAndOrderFront_(nil);
319
320 window.0.borrow().move_traffic_light();
321 pool.drain();
322
323 window
324 }
325 }
326
327 pub fn key_window_id() -> Option<usize> {
328 unsafe {
329 let app = NSApplication::sharedApplication(nil);
330 let key_window: id = msg_send![app, keyWindow];
331 if msg_send![key_window, isKindOfClass: WINDOW_CLASS] {
332 let id = get_window_state(&*key_window).borrow().id;
333 Some(id)
334 } else {
335 None
336 }
337 }
338 }
339}
340
341impl Drop for Window {
342 fn drop(&mut self) {
343 unsafe {
344 self.0.as_ref().borrow().native_window.close();
345 }
346 }
347}
348
349impl platform::Window for Window {
350 fn as_any_mut(&mut self) -> &mut dyn Any {
351 self
352 }
353
354 fn on_event(&mut self, callback: Box<dyn FnMut(Event) -> bool>) {
355 self.0.as_ref().borrow_mut().event_callback = Some(callback);
356 }
357
358 fn on_resize(&mut self, callback: Box<dyn FnMut()>) {
359 self.0.as_ref().borrow_mut().resize_callback = Some(callback);
360 }
361
362 fn on_should_close(&mut self, callback: Box<dyn FnMut() -> bool>) {
363 self.0.as_ref().borrow_mut().should_close_callback = Some(callback);
364 }
365
366 fn on_close(&mut self, callback: Box<dyn FnOnce()>) {
367 self.0.as_ref().borrow_mut().close_callback = Some(callback);
368 }
369
370 fn on_active_status_change(&mut self, callback: Box<dyn FnMut(bool)>) {
371 self.0.as_ref().borrow_mut().activate_callback = Some(callback);
372 }
373
374 fn prompt(
375 &self,
376 level: platform::PromptLevel,
377 msg: &str,
378 answers: &[&str],
379 ) -> oneshot::Receiver<usize> {
380 unsafe {
381 let alert: id = msg_send![class!(NSAlert), alloc];
382 let alert: id = msg_send![alert, init];
383 let alert_style = match level {
384 platform::PromptLevel::Info => 1,
385 platform::PromptLevel::Warning => 0,
386 platform::PromptLevel::Critical => 2,
387 };
388 let _: () = msg_send![alert, setAlertStyle: alert_style];
389 let _: () = msg_send![alert, setMessageText: ns_string(msg)];
390 for (ix, answer) in answers.into_iter().enumerate() {
391 let button: id = msg_send![alert, addButtonWithTitle: ns_string(answer)];
392 let _: () = msg_send![button, setTag: ix as NSInteger];
393 }
394 let (done_tx, done_rx) = oneshot::channel();
395 let done_tx = Cell::new(Some(done_tx));
396 let block = ConcreteBlock::new(move |answer: NSInteger| {
397 if let Some(mut done_tx) = done_tx.take() {
398 let _ = postage::sink::Sink::try_send(&mut done_tx, answer.try_into().unwrap());
399 }
400 });
401 let block = block.copy();
402 let native_window = self.0.borrow().native_window;
403 self.0
404 .borrow()
405 .executor
406 .spawn(async move {
407 let _: () = msg_send![
408 alert,
409 beginSheetModalForWindow: native_window
410 completionHandler: block
411 ];
412 })
413 .detach();
414
415 done_rx
416 }
417 }
418
419 fn activate(&self) {
420 let window = self.0.borrow().native_window;
421 self.0
422 .borrow()
423 .executor
424 .spawn(async move {
425 unsafe {
426 let _: () = msg_send![window, makeKeyAndOrderFront: nil];
427 }
428 })
429 .detach();
430 }
431
432 fn set_title(&mut self, title: &str) {
433 unsafe {
434 let app = NSApplication::sharedApplication(nil);
435 let window = self.0.borrow().native_window;
436 let title = ns_string(title);
437 msg_send![app, changeWindowsItem:window title:title filename:false]
438 }
439 }
440
441 fn set_edited(&mut self, edited: bool) {
442 unsafe {
443 let window = self.0.borrow().native_window;
444 msg_send![window, setDocumentEdited: edited as BOOL]
445 }
446
447 // Changing the document edited state resets the traffic light position,
448 // so we have to move it again.
449 self.0.borrow().move_traffic_light();
450 }
451}
452
453impl platform::WindowContext for Window {
454 fn size(&self) -> Vector2F {
455 self.0.as_ref().borrow().size()
456 }
457
458 fn scale_factor(&self) -> f32 {
459 self.0.as_ref().borrow().scale_factor()
460 }
461
462 fn present_scene(&mut self, scene: Scene) {
463 self.0.as_ref().borrow_mut().present_scene(scene);
464 }
465
466 fn titlebar_height(&self) -> f32 {
467 self.0.as_ref().borrow().titlebar_height()
468 }
469}
470
471impl WindowState {
472 fn move_traffic_light(&self) {
473 if let Some(traffic_light_position) = self.traffic_light_position {
474 let titlebar_height = self.titlebar_height();
475
476 unsafe {
477 let close_button: id = msg_send![
478 self.native_window,
479 standardWindowButton: NSWindowButton::NSWindowCloseButton
480 ];
481 let min_button: id = msg_send![
482 self.native_window,
483 standardWindowButton: NSWindowButton::NSWindowMiniaturizeButton
484 ];
485 let zoom_button: id = msg_send![
486 self.native_window,
487 standardWindowButton: NSWindowButton::NSWindowZoomButton
488 ];
489
490 let mut close_button_frame: CGRect = msg_send![close_button, frame];
491 let mut min_button_frame: CGRect = msg_send![min_button, frame];
492 let mut zoom_button_frame: CGRect = msg_send![zoom_button, frame];
493 let mut origin = vec2f(
494 traffic_light_position.x(),
495 titlebar_height
496 - traffic_light_position.y()
497 - close_button_frame.size.height as f32,
498 );
499 let button_spacing =
500 (min_button_frame.origin.x - close_button_frame.origin.x) as f32;
501
502 close_button_frame.origin = CGPoint::new(origin.x() as f64, origin.y() as f64);
503 let _: () = msg_send![close_button, setFrame: close_button_frame];
504 origin.set_x(origin.x() + button_spacing);
505
506 min_button_frame.origin = CGPoint::new(origin.x() as f64, origin.y() as f64);
507 let _: () = msg_send![min_button, setFrame: min_button_frame];
508 origin.set_x(origin.x() + button_spacing);
509
510 zoom_button_frame.origin = CGPoint::new(origin.x() as f64, origin.y() as f64);
511 let _: () = msg_send![zoom_button, setFrame: zoom_button_frame];
512 }
513 }
514 }
515}
516
517impl platform::WindowContext for WindowState {
518 fn size(&self) -> Vector2F {
519 let NSSize { width, height, .. } =
520 unsafe { NSView::frame(self.native_window.contentView()) }.size;
521 vec2f(width as f32, height as f32)
522 }
523
524 fn scale_factor(&self) -> f32 {
525 get_scale_factor(self.native_window)
526 }
527
528 fn titlebar_height(&self) -> f32 {
529 unsafe {
530 let frame = NSWindow::frame(self.native_window);
531 let content_layout_rect: CGRect = msg_send![self.native_window, contentLayoutRect];
532 (frame.size.height - content_layout_rect.size.height) as f32
533 }
534 }
535
536 fn present_scene(&mut self, scene: Scene) {
537 self.scene_to_render = Some(scene);
538 unsafe {
539 let _: () = msg_send![self.native_window.contentView(), setNeedsDisplay: YES];
540 }
541 }
542}
543
544fn get_scale_factor(native_window: id) -> f32 {
545 unsafe {
546 let screen: id = msg_send![native_window, screen];
547 NSScreen::backingScaleFactor(screen) as f32
548 }
549}
550
551unsafe fn get_window_state(object: &Object) -> Rc<RefCell<WindowState>> {
552 let raw: *mut c_void = *object.get_ivar(WINDOW_STATE_IVAR);
553 let rc1 = Rc::from_raw(raw as *mut RefCell<WindowState>);
554 let rc2 = rc1.clone();
555 mem::forget(rc1);
556 rc2
557}
558
559unsafe fn drop_window_state(object: &Object) {
560 let raw: *mut c_void = *object.get_ivar(WINDOW_STATE_IVAR);
561 Rc::from_raw(raw as *mut RefCell<WindowState>);
562}
563
564extern "C" fn yes(_: &Object, _: Sel) -> BOOL {
565 YES
566}
567
568extern "C" fn dealloc_window(this: &Object, _: Sel) {
569 unsafe {
570 drop_window_state(this);
571 let () = msg_send![super(this, class!(NSWindow)), dealloc];
572 }
573}
574
575extern "C" fn dealloc_view(this: &Object, _: Sel) {
576 unsafe {
577 drop_window_state(this);
578 let () = msg_send![super(this, class!(NSView)), dealloc];
579 }
580}
581
582extern "C" fn handle_key_equivalent(this: &Object, _: Sel, native_event: id) -> BOOL {
583 let window_state = unsafe { get_window_state(this) };
584 let mut window_state_borrow = window_state.as_ref().borrow_mut();
585
586 let event = unsafe { Event::from_native(native_event, Some(window_state_borrow.size().y())) };
587 if let Some(event) = event {
588 match &event {
589 Event::KeyDown(KeyDownEvent {
590 keystroke,
591 input,
592 is_held,
593 }) => {
594 let keydown = (keystroke.clone(), input.clone());
595 // Ignore events from held-down keys after some of the initially-pressed keys
596 // were released.
597 if *is_held {
598 if window_state_borrow.last_fresh_keydown.as_ref() != Some(&keydown) {
599 return YES;
600 }
601 } else {
602 window_state_borrow.last_fresh_keydown = Some(keydown);
603 }
604 }
605 _ => return NO,
606 }
607
608 if let Some(mut callback) = window_state_borrow.event_callback.take() {
609 drop(window_state_borrow);
610 let handled = callback(event);
611 window_state.borrow_mut().event_callback = Some(callback);
612 handled as BOOL
613 } else {
614 NO
615 }
616 } else {
617 NO
618 }
619}
620
621extern "C" fn handle_view_event(this: &Object, _: Sel, native_event: id) {
622 let window_state = unsafe { get_window_state(this) };
623 let weak_window_state = Rc::downgrade(&window_state);
624 let mut window_state_borrow = window_state.as_ref().borrow_mut();
625
626 let event = unsafe { Event::from_native(native_event, Some(window_state_borrow.size().y())) };
627
628 if let Some(event) = event {
629 match &event {
630 Event::MouseMoved(
631 event @ MouseMovedEvent {
632 pressed_button: Some(_),
633 ..
634 },
635 ) => {
636 window_state_borrow.synthetic_drag_counter += 1;
637 window_state_borrow
638 .executor
639 .spawn(synthetic_drag(
640 weak_window_state,
641 window_state_borrow.synthetic_drag_counter,
642 *event,
643 ))
644 .detach();
645 }
646 Event::MouseUp(MouseEvent {
647 button: MouseButton::Left,
648 ..
649 }) => {
650 window_state_borrow.synthetic_drag_counter += 1;
651 }
652 Event::ModifiersChanged(ModifiersChangedEvent {
653 ctrl,
654 alt,
655 shift,
656 cmd,
657 }) => {
658 // Only raise modifiers changed event when they have actually changed
659 if let Some(Event::ModifiersChanged(ModifiersChangedEvent {
660 ctrl: prev_ctrl,
661 alt: prev_alt,
662 shift: prev_shift,
663 cmd: prev_cmd,
664 })) = &window_state_borrow.previous_modifiers_changed_event
665 {
666 if prev_ctrl == ctrl
667 && prev_alt == alt
668 && prev_shift == shift
669 && prev_cmd == cmd
670 {
671 return;
672 }
673 }
674
675 window_state_borrow.previous_modifiers_changed_event = Some(event.clone());
676 }
677 _ => {}
678 }
679
680 if let Some(mut callback) = window_state_borrow.event_callback.take() {
681 drop(window_state_borrow);
682 callback(event);
683 window_state.borrow_mut().event_callback = Some(callback);
684 }
685 }
686}
687
688// Allows us to receive `cmd-.` (the shortcut for closing a dialog)
689// https://bugs.eclipse.org/bugs/show_bug.cgi?id=300620#c6
690extern "C" fn cancel_operation(this: &Object, _sel: Sel, _sender: id) {
691 let window_state = unsafe { get_window_state(this) };
692 let mut window_state_borrow = window_state.as_ref().borrow_mut();
693
694 let chars = ".".to_string();
695 let keystroke = Keystroke {
696 cmd: true,
697 ctrl: false,
698 alt: false,
699 shift: false,
700 key: chars.clone(),
701 };
702 let event = Event::KeyDown(KeyDownEvent {
703 keystroke: keystroke.clone(),
704 input: Some(chars.clone()),
705 is_held: false,
706 });
707
708 window_state_borrow.last_fresh_keydown = Some((keystroke, Some(chars)));
709 if let Some(mut callback) = window_state_borrow.event_callback.take() {
710 drop(window_state_borrow);
711 callback(event);
712 window_state.borrow_mut().event_callback = Some(callback);
713 }
714}
715
716extern "C" fn send_event(this: &Object, _: Sel, native_event: id) {
717 unsafe {
718 let () = msg_send![super(this, class!(NSWindow)), sendEvent: native_event];
719 }
720}
721
722extern "C" fn window_did_resize(this: &Object, _: Sel, _: id) {
723 let window_state = unsafe { get_window_state(this) };
724 window_state.as_ref().borrow().move_traffic_light();
725}
726
727extern "C" fn window_did_change_key_status(this: &Object, selector: Sel, _: id) {
728 let is_active = if selector == sel!(windowDidBecomeKey:) {
729 true
730 } else if selector == sel!(windowDidResignKey:) {
731 false
732 } else {
733 unreachable!();
734 };
735
736 let window_state = unsafe { get_window_state(this) };
737 let executor = window_state.as_ref().borrow().executor.clone();
738 executor
739 .spawn(async move {
740 let mut window_state_borrow = window_state.as_ref().borrow_mut();
741 if let Some(mut callback) = window_state_borrow.activate_callback.take() {
742 drop(window_state_borrow);
743 callback(is_active);
744 window_state.borrow_mut().activate_callback = Some(callback);
745 };
746 })
747 .detach();
748}
749
750extern "C" fn window_should_close(this: &Object, _: Sel, _: id) -> BOOL {
751 let window_state = unsafe { get_window_state(this) };
752 let mut window_state_borrow = window_state.as_ref().borrow_mut();
753 if let Some(mut callback) = window_state_borrow.should_close_callback.take() {
754 drop(window_state_borrow);
755 let should_close = callback();
756 window_state.borrow_mut().should_close_callback = Some(callback);
757 should_close as BOOL
758 } else {
759 YES
760 }
761}
762
763extern "C" fn close_window(this: &Object, _: Sel) {
764 unsafe {
765 let close_callback = {
766 let window_state = get_window_state(this);
767 window_state
768 .as_ref()
769 .try_borrow_mut()
770 .ok()
771 .and_then(|mut window_state| window_state.close_callback.take())
772 };
773
774 if let Some(callback) = close_callback {
775 callback();
776 }
777
778 let () = msg_send![super(this, class!(NSWindow)), close];
779 }
780}
781
782extern "C" fn make_backing_layer(this: &Object, _: Sel) -> id {
783 let window_state = unsafe { get_window_state(this) };
784 let window_state = window_state.as_ref().borrow();
785 window_state.layer
786}
787
788extern "C" fn view_did_change_backing_properties(this: &Object, _: Sel) {
789 let window_state = unsafe { get_window_state(this) };
790 let mut window_state_borrow = window_state.as_ref().borrow_mut();
791
792 unsafe {
793 let scale_factor = window_state_borrow.scale_factor() as f64;
794 let size = window_state_borrow.size();
795 let drawable_size: NSSize = NSSize {
796 width: size.x() as f64 * scale_factor,
797 height: size.y() as f64 * scale_factor,
798 };
799
800 let _: () = msg_send![window_state_borrow.layer, setContentsScale: scale_factor];
801 let _: () = msg_send![window_state_borrow.layer, setDrawableSize: drawable_size];
802 }
803
804 if let Some(mut callback) = window_state_borrow.resize_callback.take() {
805 drop(window_state_borrow);
806 callback();
807 window_state.as_ref().borrow_mut().resize_callback = Some(callback);
808 };
809}
810
811extern "C" fn set_frame_size(this: &Object, _: Sel, size: NSSize) {
812 let window_state = unsafe { get_window_state(this) };
813 let window_state_borrow = window_state.as_ref().borrow();
814
815 if window_state_borrow.size() == vec2f(size.width as f32, size.height as f32) {
816 return;
817 }
818
819 unsafe {
820 let _: () = msg_send![super(this, class!(NSView)), setFrameSize: size];
821 }
822
823 let scale_factor = window_state_borrow.scale_factor() as f64;
824 let drawable_size: NSSize = NSSize {
825 width: size.width * scale_factor,
826 height: size.height * scale_factor,
827 };
828
829 unsafe {
830 let _: () = msg_send![window_state_borrow.layer, setDrawableSize: drawable_size];
831 }
832
833 drop(window_state_borrow);
834 let mut window_state_borrow = window_state.borrow_mut();
835 if let Some(mut callback) = window_state_borrow.resize_callback.take() {
836 drop(window_state_borrow);
837 callback();
838 window_state.borrow_mut().resize_callback = Some(callback);
839 };
840}
841
842extern "C" fn display_layer(this: &Object, _: Sel, _: id) {
843 unsafe {
844 let window_state = get_window_state(this);
845 let mut window_state = window_state.as_ref().borrow_mut();
846
847 if let Some(scene) = window_state.scene_to_render.take() {
848 let drawable: &metal::MetalDrawableRef = msg_send![window_state.layer, nextDrawable];
849 let command_queue = window_state.command_queue.clone();
850 let command_buffer = command_queue.new_command_buffer();
851
852 let size = window_state.size();
853 let scale_factor = window_state.scale_factor();
854
855 window_state.renderer.render(
856 &scene,
857 size * scale_factor,
858 command_buffer,
859 drawable.texture(),
860 );
861
862 command_buffer.commit();
863 command_buffer.wait_until_completed();
864 drawable.present();
865 };
866 }
867}
868
869async fn synthetic_drag(
870 window_state: Weak<RefCell<WindowState>>,
871 drag_id: usize,
872 event: MouseMovedEvent,
873) {
874 loop {
875 Timer::after(Duration::from_millis(16)).await;
876 if let Some(window_state) = window_state.upgrade() {
877 let mut window_state_borrow = window_state.borrow_mut();
878 if window_state_borrow.synthetic_drag_counter == drag_id {
879 if let Some(mut callback) = window_state_borrow.event_callback.take() {
880 drop(window_state_borrow);
881 callback(Event::MouseMoved(event));
882 window_state.borrow_mut().event_callback = Some(callback);
883 }
884 } else {
885 break;
886 }
887 }
888 }
889}
890
891unsafe fn ns_string(string: &str) -> id {
892 NSString::alloc(nil).init_str(string).autorelease()
893}