1use super::{geometry::RectFExt, renderer::Renderer};
2use crate::{
3 executor,
4 geometry::{
5 rect::RectF,
6 vector::{vec2f, Vector2F},
7 },
8 keymap::Keystroke,
9 platform::{self, Event, WindowBounds, WindowContext},
10 InputHandler, KeyDownEvent, ModifiersChangedEvent, MouseButton, MouseButtonEvent,
11 MouseMovedEvent, Scene,
12};
13use block::ConcreteBlock;
14use cocoa::{
15 appkit::{
16 CGPoint, NSApplication, NSBackingStoreBuffered, NSScreen, NSView, NSViewHeightSizable,
17 NSViewWidthSizable, NSWindow, NSWindowButton, NSWindowStyleMask,
18 },
19 base::{id, nil},
20 foundation::{
21 NSAutoreleasePool, NSInteger, NSNotFound, NSPoint, NSRect, NSSize, NSString, NSUInteger,
22 },
23 quartzcore::AutoresizingMask,
24};
25use core_graphics::display::CGRect;
26use ctor::ctor;
27use foreign_types::ForeignType as _;
28use objc::{
29 class,
30 declare::ClassDecl,
31 msg_send,
32 runtime::{Class, Object, Protocol, Sel, BOOL, NO, YES},
33 sel, sel_impl,
34};
35use postage::oneshot;
36use smol::Timer;
37use std::{
38 any::Any,
39 cell::{Cell, RefCell},
40 convert::TryInto,
41 ffi::{c_void, CStr},
42 mem,
43 ops::Range,
44 os::raw::c_char,
45 ptr,
46 rc::{Rc, Weak},
47 sync::Arc,
48 time::Duration,
49};
50
51const WINDOW_STATE_IVAR: &str = "windowState";
52
53static mut WINDOW_CLASS: *const Class = ptr::null();
54static mut VIEW_CLASS: *const Class = ptr::null();
55
56#[repr(C)]
57#[derive(Copy, Clone, Debug)]
58struct NSRange {
59 pub location: NSUInteger,
60 pub length: NSUInteger,
61}
62
63impl NSRange {
64 fn invalid() -> Self {
65 Self {
66 location: NSNotFound as NSUInteger,
67 length: 0,
68 }
69 }
70
71 fn is_valid(&self) -> bool {
72 self.location != NSNotFound as NSUInteger
73 }
74
75 fn to_range(self) -> Option<Range<usize>> {
76 if self.is_valid() {
77 let start = self.location as usize;
78 let end = start + self.length as usize;
79 Some(start..end)
80 } else {
81 None
82 }
83 }
84}
85
86impl From<Range<usize>> for NSRange {
87 fn from(range: Range<usize>) -> Self {
88 NSRange {
89 location: range.start as NSUInteger,
90 length: range.len() as NSUInteger,
91 }
92 }
93}
94
95unsafe impl objc::Encode for NSRange {
96 fn encode() -> objc::Encoding {
97 let encoding = format!(
98 "{{NSRange={}{}}}",
99 NSUInteger::encode().as_str(),
100 NSUInteger::encode().as_str()
101 );
102 unsafe { objc::Encoding::from_str(&encoding) }
103 }
104}
105
106#[allow(non_upper_case_globals)]
107const NSViewLayerContentsRedrawDuringViewResize: NSInteger = 2;
108
109#[ctor]
110unsafe fn build_classes() {
111 WINDOW_CLASS = {
112 let mut decl = ClassDecl::new("GPUIWindow", class!(NSWindow)).unwrap();
113 decl.add_ivar::<*mut c_void>(WINDOW_STATE_IVAR);
114 decl.add_method(sel!(dealloc), dealloc_window as extern "C" fn(&Object, Sel));
115 decl.add_method(
116 sel!(canBecomeMainWindow),
117 yes as extern "C" fn(&Object, Sel) -> BOOL,
118 );
119 decl.add_method(
120 sel!(canBecomeKeyWindow),
121 yes as extern "C" fn(&Object, Sel) -> BOOL,
122 );
123 decl.add_method(
124 sel!(sendEvent:),
125 send_event as extern "C" fn(&Object, Sel, id),
126 );
127 decl.add_method(
128 sel!(windowDidResize:),
129 window_did_resize as extern "C" fn(&Object, Sel, id),
130 );
131 decl.add_method(
132 sel!(windowWillEnterFullScreen:),
133 window_will_enter_fullscreen as extern "C" fn(&Object, Sel, id),
134 );
135 decl.add_method(
136 sel!(windowWillExitFullScreen:),
137 window_will_exit_fullscreen as extern "C" fn(&Object, Sel, id),
138 );
139 decl.add_method(
140 sel!(windowDidBecomeKey:),
141 window_did_change_key_status as extern "C" fn(&Object, Sel, id),
142 );
143 decl.add_method(
144 sel!(windowDidResignKey:),
145 window_did_change_key_status as extern "C" fn(&Object, Sel, id),
146 );
147 decl.add_method(
148 sel!(windowShouldClose:),
149 window_should_close as extern "C" fn(&Object, Sel, id) -> BOOL,
150 );
151 decl.add_method(sel!(close), close_window as extern "C" fn(&Object, Sel));
152 decl.register()
153 };
154
155 VIEW_CLASS = {
156 let mut decl = ClassDecl::new("GPUIView", class!(NSView)).unwrap();
157 decl.add_ivar::<*mut c_void>(WINDOW_STATE_IVAR);
158
159 decl.add_method(sel!(dealloc), dealloc_view as extern "C" fn(&Object, Sel));
160
161 decl.add_method(
162 sel!(performKeyEquivalent:),
163 handle_key_equivalent as extern "C" fn(&Object, Sel, id) -> BOOL,
164 );
165 decl.add_method(
166 sel!(keyDown:),
167 handle_key_down as extern "C" fn(&Object, Sel, id),
168 );
169 decl.add_method(
170 sel!(mouseDown:),
171 handle_view_event as extern "C" fn(&Object, Sel, id),
172 );
173 decl.add_method(
174 sel!(mouseUp:),
175 handle_view_event as extern "C" fn(&Object, Sel, id),
176 );
177 decl.add_method(
178 sel!(rightMouseDown:),
179 handle_view_event as extern "C" fn(&Object, Sel, id),
180 );
181 decl.add_method(
182 sel!(rightMouseUp:),
183 handle_view_event as extern "C" fn(&Object, Sel, id),
184 );
185 decl.add_method(
186 sel!(otherMouseDown:),
187 handle_view_event as extern "C" fn(&Object, Sel, id),
188 );
189 decl.add_method(
190 sel!(otherMouseUp:),
191 handle_view_event as extern "C" fn(&Object, Sel, id),
192 );
193 decl.add_method(
194 sel!(mouseMoved:),
195 handle_view_event as extern "C" fn(&Object, Sel, id),
196 );
197 decl.add_method(
198 sel!(mouseDragged:),
199 handle_view_event as extern "C" fn(&Object, Sel, id),
200 );
201 decl.add_method(
202 sel!(scrollWheel:),
203 handle_view_event as extern "C" fn(&Object, Sel, id),
204 );
205 decl.add_method(
206 sel!(flagsChanged:),
207 handle_view_event as extern "C" fn(&Object, Sel, id),
208 );
209 decl.add_method(
210 sel!(cancelOperation:),
211 cancel_operation as extern "C" fn(&Object, Sel, id),
212 );
213
214 decl.add_method(
215 sel!(makeBackingLayer),
216 make_backing_layer as extern "C" fn(&Object, Sel) -> id,
217 );
218
219 decl.add_protocol(Protocol::get("CALayerDelegate").unwrap());
220 decl.add_method(
221 sel!(viewDidChangeBackingProperties),
222 view_did_change_backing_properties as extern "C" fn(&Object, Sel),
223 );
224 decl.add_method(
225 sel!(setFrameSize:),
226 set_frame_size as extern "C" fn(&Object, Sel, NSSize),
227 );
228 decl.add_method(
229 sel!(displayLayer:),
230 display_layer as extern "C" fn(&Object, Sel, id),
231 );
232
233 decl.add_protocol(Protocol::get("NSTextInputClient").unwrap());
234 decl.add_method(
235 sel!(validAttributesForMarkedText),
236 valid_attributes_for_marked_text as extern "C" fn(&Object, Sel) -> id,
237 );
238 decl.add_method(
239 sel!(hasMarkedText),
240 has_marked_text as extern "C" fn(&Object, Sel) -> BOOL,
241 );
242 decl.add_method(
243 sel!(markedRange),
244 marked_range as extern "C" fn(&Object, Sel) -> NSRange,
245 );
246 decl.add_method(
247 sel!(selectedRange),
248 selected_range as extern "C" fn(&Object, Sel) -> NSRange,
249 );
250 decl.add_method(
251 sel!(firstRectForCharacterRange:actualRange:),
252 first_rect_for_character_range as extern "C" fn(&Object, Sel, NSRange, id) -> NSRect,
253 );
254 decl.add_method(
255 sel!(insertText:replacementRange:),
256 insert_text as extern "C" fn(&Object, Sel, id, NSRange),
257 );
258 decl.add_method(
259 sel!(setMarkedText:selectedRange:replacementRange:),
260 set_marked_text as extern "C" fn(&Object, Sel, id, NSRange, NSRange),
261 );
262 decl.add_method(sel!(unmarkText), unmark_text as extern "C" fn(&Object, Sel));
263 decl.add_method(
264 sel!(attributedSubstringForProposedRange:actualRange:),
265 attributed_substring_for_proposed_range
266 as extern "C" fn(&Object, Sel, NSRange, *mut c_void) -> id,
267 );
268
269 // Suppress beep on keystrokes with modifier keys.
270 decl.add_method(
271 sel!(doCommandBySelector:),
272 do_command_by_selector as extern "C" fn(&Object, Sel, Sel),
273 );
274
275 decl.register()
276 };
277}
278
279pub struct Window(Rc<RefCell<WindowState>>);
280
281struct WindowState {
282 id: usize,
283 native_window: id,
284 event_callback: Option<Box<dyn FnMut(Event) -> bool>>,
285 activate_callback: Option<Box<dyn FnMut(bool)>>,
286 resize_callback: Option<Box<dyn FnMut()>>,
287 fullscreen_callback: Option<Box<dyn FnMut(bool)>>,
288 should_close_callback: Option<Box<dyn FnMut() -> bool>>,
289 close_callback: Option<Box<dyn FnOnce()>>,
290 input_handler: Option<Box<dyn InputHandler>>,
291 pending_key_down: Option<(KeyDownEvent, Option<InsertText>)>,
292 performed_key_equivalent: bool,
293 synthetic_drag_counter: usize,
294 executor: Rc<executor::Foreground>,
295 scene_to_render: Option<Scene>,
296 renderer: Renderer,
297 command_queue: metal::CommandQueue,
298 last_fresh_keydown: Option<Keystroke>,
299 layer: id,
300 traffic_light_position: Option<Vector2F>,
301 previous_modifiers_changed_event: Option<Event>,
302}
303
304struct InsertText {
305 replacement_range: Option<Range<usize>>,
306 text: String,
307}
308
309impl Window {
310 pub fn open(
311 id: usize,
312 options: platform::WindowOptions,
313 executor: Rc<executor::Foreground>,
314 fonts: Arc<dyn platform::FontSystem>,
315 ) -> Self {
316 const PIXEL_FORMAT: metal::MTLPixelFormat = metal::MTLPixelFormat::BGRA8Unorm;
317
318 unsafe {
319 let pool = NSAutoreleasePool::new(nil);
320
321 let frame = match options.bounds {
322 WindowBounds::Maximized => RectF::new(Default::default(), vec2f(1024., 768.)),
323 WindowBounds::Fixed(rect) => rect,
324 }
325 .to_ns_rect();
326 let mut style_mask = NSWindowStyleMask::NSClosableWindowMask
327 | NSWindowStyleMask::NSMiniaturizableWindowMask
328 | NSWindowStyleMask::NSResizableWindowMask
329 | NSWindowStyleMask::NSTitledWindowMask;
330
331 if options.titlebar_appears_transparent {
332 style_mask |= NSWindowStyleMask::NSFullSizeContentViewWindowMask;
333 }
334
335 let native_window: id = msg_send![WINDOW_CLASS, alloc];
336 let native_window = native_window.initWithContentRect_styleMask_backing_defer_(
337 frame,
338 style_mask,
339 NSBackingStoreBuffered,
340 NO,
341 );
342 assert!(!native_window.is_null());
343
344 if matches!(options.bounds, WindowBounds::Maximized) {
345 let screen = native_window.screen();
346 native_window.setFrame_display_(screen.visibleFrame(), YES);
347 }
348
349 let device: metal::Device = if let Some(device) = metal::Device::system_default() {
350 device
351 } else {
352 log::error!("unable to access a compatible graphics device");
353 std::process::exit(1);
354 };
355
356 let layer: id = msg_send![class!(CAMetalLayer), layer];
357 let _: () = msg_send![layer, setDevice: device.as_ptr()];
358 let _: () = msg_send![layer, setPixelFormat: PIXEL_FORMAT];
359 let _: () = msg_send![layer, setAllowsNextDrawableTimeout: NO];
360 let _: () = msg_send![layer, setNeedsDisplayOnBoundsChange: YES];
361 let _: () = msg_send![layer, setPresentsWithTransaction: YES];
362 let _: () = msg_send![
363 layer,
364 setAutoresizingMask: AutoresizingMask::WIDTH_SIZABLE
365 | AutoresizingMask::HEIGHT_SIZABLE
366 ];
367
368 let native_view: id = msg_send![VIEW_CLASS, alloc];
369 let native_view = NSView::init(native_view);
370 assert!(!native_view.is_null());
371
372 let window = Self(Rc::new(RefCell::new(WindowState {
373 id,
374 native_window,
375 event_callback: None,
376 resize_callback: None,
377 should_close_callback: None,
378 close_callback: None,
379 activate_callback: None,
380 fullscreen_callback: None,
381 input_handler: None,
382 pending_key_down: None,
383 performed_key_equivalent: false,
384 synthetic_drag_counter: 0,
385 executor,
386 scene_to_render: Default::default(),
387 renderer: Renderer::new(
388 device.clone(),
389 PIXEL_FORMAT,
390 get_scale_factor(native_window),
391 fonts,
392 ),
393 command_queue: device.new_command_queue(),
394 last_fresh_keydown: None,
395 layer,
396 traffic_light_position: options.traffic_light_position,
397 previous_modifiers_changed_event: None,
398 })));
399
400 (*native_window).set_ivar(
401 WINDOW_STATE_IVAR,
402 Rc::into_raw(window.0.clone()) as *const c_void,
403 );
404 native_window.setDelegate_(native_window);
405 (*native_view).set_ivar(
406 WINDOW_STATE_IVAR,
407 Rc::into_raw(window.0.clone()) as *const c_void,
408 );
409
410 if let Some(title) = options.title.as_ref() {
411 native_window.setTitle_(NSString::alloc(nil).init_str(title));
412 }
413 if options.titlebar_appears_transparent {
414 native_window.setTitlebarAppearsTransparent_(YES);
415 }
416 native_window.setAcceptsMouseMovedEvents_(YES);
417
418 native_view.setAutoresizingMask_(NSViewWidthSizable | NSViewHeightSizable);
419 native_view.setWantsBestResolutionOpenGLSurface_(YES);
420
421 // From winit crate: On Mojave, views automatically become layer-backed shortly after
422 // being added to a native_window. Changing the layer-backedness of a view breaks the
423 // association between the view and its associated OpenGL context. To work around this,
424 // on we explicitly make the view layer-backed up front so that AppKit doesn't do it
425 // itself and break the association with its context.
426 native_view.setWantsLayer(YES);
427 let _: () = msg_send![
428 native_view,
429 setLayerContentsRedrawPolicy: NSViewLayerContentsRedrawDuringViewResize
430 ];
431
432 native_window.setContentView_(native_view.autorelease());
433 native_window.makeFirstResponder_(native_view);
434
435 native_window.center();
436 native_window.makeKeyAndOrderFront_(nil);
437
438 window.0.borrow().move_traffic_light();
439 pool.drain();
440
441 window
442 }
443 }
444
445 pub fn key_window_id() -> Option<usize> {
446 unsafe {
447 let app = NSApplication::sharedApplication(nil);
448 let key_window: id = msg_send![app, keyWindow];
449 if msg_send![key_window, isKindOfClass: WINDOW_CLASS] {
450 let id = get_window_state(&*key_window).borrow().id;
451 Some(id)
452 } else {
453 None
454 }
455 }
456 }
457}
458
459impl Drop for Window {
460 fn drop(&mut self) {
461 unsafe {
462 self.0.as_ref().borrow().native_window.close();
463 }
464 }
465}
466
467impl platform::Window for Window {
468 fn as_any_mut(&mut self) -> &mut dyn Any {
469 self
470 }
471
472 fn on_event(&mut self, callback: Box<dyn FnMut(Event) -> bool>) {
473 self.0.as_ref().borrow_mut().event_callback = Some(callback);
474 }
475
476 fn on_resize(&mut self, callback: Box<dyn FnMut()>) {
477 self.0.as_ref().borrow_mut().resize_callback = Some(callback);
478 }
479
480 fn on_fullscreen(&mut self, callback: Box<dyn FnMut(bool)>) {
481 self.0.as_ref().borrow_mut().fullscreen_callback = Some(callback);
482 }
483
484 fn on_should_close(&mut self, callback: Box<dyn FnMut() -> bool>) {
485 self.0.as_ref().borrow_mut().should_close_callback = Some(callback);
486 }
487
488 fn on_close(&mut self, callback: Box<dyn FnOnce()>) {
489 self.0.as_ref().borrow_mut().close_callback = Some(callback);
490 }
491
492 fn on_active_status_change(&mut self, callback: Box<dyn FnMut(bool)>) {
493 self.0.as_ref().borrow_mut().activate_callback = Some(callback);
494 }
495
496 fn set_input_handler(&mut self, input_handler: Box<dyn InputHandler>) {
497 self.0.as_ref().borrow_mut().input_handler = Some(input_handler);
498 }
499
500 fn prompt(
501 &self,
502 level: platform::PromptLevel,
503 msg: &str,
504 answers: &[&str],
505 ) -> oneshot::Receiver<usize> {
506 unsafe {
507 let alert: id = msg_send![class!(NSAlert), alloc];
508 let alert: id = msg_send![alert, init];
509 let alert_style = match level {
510 platform::PromptLevel::Info => 1,
511 platform::PromptLevel::Warning => 0,
512 platform::PromptLevel::Critical => 2,
513 };
514 let _: () = msg_send![alert, setAlertStyle: alert_style];
515 let _: () = msg_send![alert, setMessageText: ns_string(msg)];
516 for (ix, answer) in answers.iter().enumerate() {
517 let button: id = msg_send![alert, addButtonWithTitle: ns_string(answer)];
518 let _: () = msg_send![button, setTag: ix as NSInteger];
519 }
520 let (done_tx, done_rx) = oneshot::channel();
521 let done_tx = Cell::new(Some(done_tx));
522 let block = ConcreteBlock::new(move |answer: NSInteger| {
523 if let Some(mut done_tx) = done_tx.take() {
524 let _ = postage::sink::Sink::try_send(&mut done_tx, answer.try_into().unwrap());
525 }
526 });
527 let block = block.copy();
528 let native_window = self.0.borrow().native_window;
529 self.0
530 .borrow()
531 .executor
532 .spawn(async move {
533 let _: () = msg_send![
534 alert,
535 beginSheetModalForWindow: native_window
536 completionHandler: block
537 ];
538 })
539 .detach();
540
541 done_rx
542 }
543 }
544
545 fn activate(&self) {
546 let window = self.0.borrow().native_window;
547 self.0
548 .borrow()
549 .executor
550 .spawn(async move {
551 unsafe {
552 let _: () = msg_send![window, makeKeyAndOrderFront: nil];
553 }
554 })
555 .detach();
556 }
557
558 fn set_title(&mut self, title: &str) {
559 unsafe {
560 let app = NSApplication::sharedApplication(nil);
561 let window = self.0.borrow().native_window;
562 let title = ns_string(title);
563 msg_send![app, changeWindowsItem:window title:title filename:false]
564 }
565 }
566
567 fn set_edited(&mut self, edited: bool) {
568 unsafe {
569 let window = self.0.borrow().native_window;
570 msg_send![window, setDocumentEdited: edited as BOOL]
571 }
572
573 // Changing the document edited state resets the traffic light position,
574 // so we have to move it again.
575 self.0.borrow().move_traffic_light();
576 }
577
578 fn show_character_palette(&self) {
579 unsafe {
580 let app = NSApplication::sharedApplication(nil);
581 let window = self.0.borrow().native_window;
582 let _: () = msg_send![app, orderFrontCharacterPalette: window];
583 }
584 }
585
586 fn minimize(&self) {
587 let window = self.0.borrow().native_window;
588 unsafe {
589 window.miniaturize_(nil);
590 }
591 }
592
593 fn zoom(&self) {
594 let this = self.0.borrow();
595 let window = this.native_window;
596 this.executor
597 .spawn(async move {
598 unsafe {
599 window.zoom_(nil);
600 }
601 })
602 .detach();
603 }
604
605 fn toggle_full_screen(&self) {
606 let this = self.0.borrow();
607 let window = this.native_window;
608 this.executor
609 .spawn(async move {
610 unsafe {
611 window.toggleFullScreen_(nil);
612 }
613 })
614 .detach();
615 }
616}
617
618impl platform::WindowContext for Window {
619 fn size(&self) -> Vector2F {
620 self.0.as_ref().borrow().size()
621 }
622
623 fn scale_factor(&self) -> f32 {
624 self.0.as_ref().borrow().scale_factor()
625 }
626
627 fn present_scene(&mut self, scene: Scene) {
628 self.0.as_ref().borrow_mut().present_scene(scene);
629 }
630
631 fn titlebar_height(&self) -> f32 {
632 self.0.as_ref().borrow().titlebar_height()
633 }
634}
635
636impl WindowState {
637 fn move_traffic_light(&self) {
638 if let Some(traffic_light_position) = self.traffic_light_position {
639 let titlebar_height = self.titlebar_height();
640
641 unsafe {
642 let close_button: id = msg_send![
643 self.native_window,
644 standardWindowButton: NSWindowButton::NSWindowCloseButton
645 ];
646 let min_button: id = msg_send![
647 self.native_window,
648 standardWindowButton: NSWindowButton::NSWindowMiniaturizeButton
649 ];
650 let zoom_button: id = msg_send![
651 self.native_window,
652 standardWindowButton: NSWindowButton::NSWindowZoomButton
653 ];
654
655 let mut close_button_frame: CGRect = msg_send![close_button, frame];
656 let mut min_button_frame: CGRect = msg_send![min_button, frame];
657 let mut zoom_button_frame: CGRect = msg_send![zoom_button, frame];
658 let mut origin = vec2f(
659 traffic_light_position.x(),
660 titlebar_height
661 - traffic_light_position.y()
662 - close_button_frame.size.height as f32,
663 );
664 let button_spacing =
665 (min_button_frame.origin.x - close_button_frame.origin.x) as f32;
666
667 close_button_frame.origin = CGPoint::new(origin.x() as f64, origin.y() as f64);
668 let _: () = msg_send![close_button, setFrame: close_button_frame];
669 origin.set_x(origin.x() + button_spacing);
670
671 min_button_frame.origin = CGPoint::new(origin.x() as f64, origin.y() as f64);
672 let _: () = msg_send![min_button, setFrame: min_button_frame];
673 origin.set_x(origin.x() + button_spacing);
674
675 zoom_button_frame.origin = CGPoint::new(origin.x() as f64, origin.y() as f64);
676 let _: () = msg_send![zoom_button, setFrame: zoom_button_frame];
677 }
678 }
679 }
680}
681
682impl platform::WindowContext for WindowState {
683 fn size(&self) -> Vector2F {
684 let NSSize { width, height, .. } =
685 unsafe { NSView::frame(self.native_window.contentView()) }.size;
686 vec2f(width as f32, height as f32)
687 }
688
689 fn scale_factor(&self) -> f32 {
690 get_scale_factor(self.native_window)
691 }
692
693 fn titlebar_height(&self) -> f32 {
694 unsafe {
695 let frame = NSWindow::frame(self.native_window);
696 let content_layout_rect: CGRect = msg_send![self.native_window, contentLayoutRect];
697 (frame.size.height - content_layout_rect.size.height) as f32
698 }
699 }
700
701 fn present_scene(&mut self, scene: Scene) {
702 self.scene_to_render = Some(scene);
703 unsafe {
704 let _: () = msg_send![self.native_window.contentView(), setNeedsDisplay: YES];
705 }
706 }
707}
708
709fn get_scale_factor(native_window: id) -> f32 {
710 unsafe {
711 let screen: id = msg_send![native_window, screen];
712 NSScreen::backingScaleFactor(screen) as f32
713 }
714}
715
716unsafe fn get_window_state(object: &Object) -> Rc<RefCell<WindowState>> {
717 let raw: *mut c_void = *object.get_ivar(WINDOW_STATE_IVAR);
718 let rc1 = Rc::from_raw(raw as *mut RefCell<WindowState>);
719 let rc2 = rc1.clone();
720 mem::forget(rc1);
721 rc2
722}
723
724unsafe fn drop_window_state(object: &Object) {
725 let raw: *mut c_void = *object.get_ivar(WINDOW_STATE_IVAR);
726 Rc::from_raw(raw as *mut RefCell<WindowState>);
727}
728
729extern "C" fn yes(_: &Object, _: Sel) -> BOOL {
730 YES
731}
732
733extern "C" fn dealloc_window(this: &Object, _: Sel) {
734 unsafe {
735 drop_window_state(this);
736 let _: () = msg_send![super(this, class!(NSWindow)), dealloc];
737 }
738}
739
740extern "C" fn dealloc_view(this: &Object, _: Sel) {
741 unsafe {
742 drop_window_state(this);
743 let _: () = msg_send![super(this, class!(NSView)), dealloc];
744 }
745}
746
747extern "C" fn handle_key_equivalent(this: &Object, _: Sel, native_event: id) -> BOOL {
748 handle_key_event(this, native_event, true)
749}
750
751extern "C" fn handle_key_down(this: &Object, _: Sel, native_event: id) {
752 handle_key_event(this, native_event, false);
753}
754
755extern "C" fn handle_key_event(this: &Object, native_event: id, key_equivalent: bool) -> BOOL {
756 let window_state = unsafe { get_window_state(this) };
757
758 let mut window_state_borrow = window_state.as_ref().borrow_mut();
759
760 let event = unsafe { Event::from_native(native_event, Some(window_state_borrow.size().y())) };
761 if let Some(event) = event {
762 if key_equivalent {
763 window_state_borrow.performed_key_equivalent = true;
764 } else if window_state_borrow.performed_key_equivalent {
765 return NO;
766 }
767
768 let function_is_held;
769 window_state_borrow.pending_key_down = match event {
770 Event::KeyDown(event) => {
771 let keydown = event.keystroke.clone();
772 // Ignore events from held-down keys after some of the initially-pressed keys
773 // were released.
774 if event.is_held {
775 if window_state_borrow.last_fresh_keydown.as_ref() != Some(&keydown) {
776 return YES;
777 }
778 } else {
779 window_state_borrow.last_fresh_keydown = Some(keydown);
780 }
781 function_is_held = event.keystroke.function;
782 Some((event, None))
783 }
784 _ => return NO,
785 };
786
787 drop(window_state_borrow);
788
789 if !function_is_held {
790 unsafe {
791 let input_context: id = msg_send![this, inputContext];
792 let _: BOOL = msg_send![input_context, handleEvent: native_event];
793 }
794 }
795
796 let mut handled = false;
797 let mut window_state_borrow = window_state.borrow_mut();
798 if let Some((event, insert_text)) = window_state_borrow.pending_key_down.take() {
799 if let Some(mut callback) = window_state_borrow.event_callback.take() {
800 drop(window_state_borrow);
801
802 let is_composing =
803 with_input_handler(this, |input_handler| input_handler.marked_text_range())
804 .flatten()
805 .is_some();
806 if !is_composing {
807 handled = callback(Event::KeyDown(event));
808 }
809
810 if !handled {
811 if let Some(insert) = insert_text {
812 handled = true;
813 with_input_handler(this, |input_handler| {
814 input_handler
815 .replace_text_in_range(insert.replacement_range, &insert.text)
816 });
817 }
818 }
819
820 window_state.borrow_mut().event_callback = Some(callback);
821 }
822 } else {
823 handled = true;
824 }
825
826 handled as BOOL
827 } else {
828 NO
829 }
830}
831
832extern "C" fn handle_view_event(this: &Object, _: Sel, native_event: id) {
833 let window_state = unsafe { get_window_state(this) };
834 let weak_window_state = Rc::downgrade(&window_state);
835 let mut window_state_borrow = window_state.as_ref().borrow_mut();
836
837 let event = unsafe { Event::from_native(native_event, Some(window_state_borrow.size().y())) };
838 if let Some(event) = event {
839 match &event {
840 Event::MouseMoved(
841 event @ MouseMovedEvent {
842 pressed_button: Some(_),
843 ..
844 },
845 ) => {
846 window_state_borrow.synthetic_drag_counter += 1;
847 window_state_borrow
848 .executor
849 .spawn(synthetic_drag(
850 weak_window_state,
851 window_state_borrow.synthetic_drag_counter,
852 *event,
853 ))
854 .detach();
855 }
856 Event::MouseUp(MouseButtonEvent {
857 button: MouseButton::Left,
858 ..
859 }) => {
860 window_state_borrow.synthetic_drag_counter += 1;
861 }
862 Event::ModifiersChanged(ModifiersChangedEvent {
863 ctrl,
864 alt,
865 shift,
866 cmd,
867 }) => {
868 // Only raise modifiers changed event when they have actually changed
869 if let Some(Event::ModifiersChanged(ModifiersChangedEvent {
870 ctrl: prev_ctrl,
871 alt: prev_alt,
872 shift: prev_shift,
873 cmd: prev_cmd,
874 })) = &window_state_borrow.previous_modifiers_changed_event
875 {
876 if prev_ctrl == ctrl
877 && prev_alt == alt
878 && prev_shift == shift
879 && prev_cmd == cmd
880 {
881 return;
882 }
883 }
884
885 window_state_borrow.previous_modifiers_changed_event = Some(event.clone());
886 }
887 _ => {}
888 }
889
890 if let Some(mut callback) = window_state_borrow.event_callback.take() {
891 drop(window_state_borrow);
892 callback(event);
893 window_state.borrow_mut().event_callback = Some(callback);
894 }
895 }
896}
897
898// Allows us to receive `cmd-.` (the shortcut for closing a dialog)
899// https://bugs.eclipse.org/bugs/show_bug.cgi?id=300620#c6
900extern "C" fn cancel_operation(this: &Object, _sel: Sel, _sender: id) {
901 let window_state = unsafe { get_window_state(this) };
902 let mut window_state_borrow = window_state.as_ref().borrow_mut();
903
904 let keystroke = Keystroke {
905 cmd: true,
906 ctrl: false,
907 alt: false,
908 shift: false,
909 function: false,
910 key: ".".into(),
911 };
912 let event = Event::KeyDown(KeyDownEvent {
913 keystroke: keystroke.clone(),
914 is_held: false,
915 });
916
917 window_state_borrow.last_fresh_keydown = Some(keystroke);
918 if let Some(mut callback) = window_state_borrow.event_callback.take() {
919 drop(window_state_borrow);
920 callback(event);
921 window_state.borrow_mut().event_callback = Some(callback);
922 }
923}
924
925extern "C" fn send_event(this: &Object, _: Sel, native_event: id) {
926 unsafe {
927 let _: () = msg_send![super(this, class!(NSWindow)), sendEvent: native_event];
928 get_window_state(this).borrow_mut().performed_key_equivalent = false;
929 }
930}
931
932extern "C" fn window_did_resize(this: &Object, _: Sel, _: id) {
933 let window_state = unsafe { get_window_state(this) };
934 window_state.as_ref().borrow().move_traffic_light();
935}
936
937extern "C" fn window_will_enter_fullscreen(this: &Object, _: Sel, _: id) {
938 window_fullscreen_changed(this, true);
939}
940
941extern "C" fn window_will_exit_fullscreen(this: &Object, _: Sel, _: id) {
942 window_fullscreen_changed(this, false);
943}
944
945fn window_fullscreen_changed(this: &Object, is_fullscreen: bool) {
946 let window_state = unsafe { get_window_state(this) };
947 let mut window_state_borrow = window_state.as_ref().borrow_mut();
948 if let Some(mut callback) = window_state_borrow.fullscreen_callback.take() {
949 drop(window_state_borrow);
950 callback(is_fullscreen);
951 window_state.borrow_mut().fullscreen_callback = Some(callback);
952 }
953}
954
955extern "C" fn window_did_change_key_status(this: &Object, selector: Sel, _: id) {
956 let is_active = if selector == sel!(windowDidBecomeKey:) {
957 true
958 } else if selector == sel!(windowDidResignKey:) {
959 false
960 } else {
961 unreachable!();
962 };
963
964 let window_state = unsafe { get_window_state(this) };
965 let executor = window_state.as_ref().borrow().executor.clone();
966 executor
967 .spawn(async move {
968 let mut window_state_borrow = window_state.as_ref().borrow_mut();
969 if let Some(mut callback) = window_state_borrow.activate_callback.take() {
970 drop(window_state_borrow);
971 callback(is_active);
972 window_state.borrow_mut().activate_callback = Some(callback);
973 };
974 })
975 .detach();
976}
977
978extern "C" fn window_should_close(this: &Object, _: Sel, _: id) -> BOOL {
979 let window_state = unsafe { get_window_state(this) };
980 let mut window_state_borrow = window_state.as_ref().borrow_mut();
981 if let Some(mut callback) = window_state_borrow.should_close_callback.take() {
982 drop(window_state_borrow);
983 let should_close = callback();
984 window_state.borrow_mut().should_close_callback = Some(callback);
985 should_close as BOOL
986 } else {
987 YES
988 }
989}
990
991extern "C" fn close_window(this: &Object, _: Sel) {
992 unsafe {
993 let close_callback = {
994 let window_state = get_window_state(this);
995 window_state
996 .as_ref()
997 .try_borrow_mut()
998 .ok()
999 .and_then(|mut window_state| window_state.close_callback.take())
1000 };
1001
1002 if let Some(callback) = close_callback {
1003 callback();
1004 }
1005
1006 let _: () = msg_send![super(this, class!(NSWindow)), close];
1007 }
1008}
1009
1010extern "C" fn make_backing_layer(this: &Object, _: Sel) -> id {
1011 let window_state = unsafe { get_window_state(this) };
1012 let window_state = window_state.as_ref().borrow();
1013 window_state.layer
1014}
1015
1016extern "C" fn view_did_change_backing_properties(this: &Object, _: Sel) {
1017 let window_state = unsafe { get_window_state(this) };
1018 let mut window_state_borrow = window_state.as_ref().borrow_mut();
1019
1020 unsafe {
1021 let scale_factor = window_state_borrow.scale_factor() as f64;
1022 let size = window_state_borrow.size();
1023 let drawable_size: NSSize = NSSize {
1024 width: size.x() as f64 * scale_factor,
1025 height: size.y() as f64 * scale_factor,
1026 };
1027
1028 let _: () = msg_send![window_state_borrow.layer, setContentsScale: scale_factor];
1029 let _: () = msg_send![window_state_borrow.layer, setDrawableSize: drawable_size];
1030 }
1031
1032 if let Some(mut callback) = window_state_borrow.resize_callback.take() {
1033 drop(window_state_borrow);
1034 callback();
1035 window_state.as_ref().borrow_mut().resize_callback = Some(callback);
1036 };
1037}
1038
1039extern "C" fn set_frame_size(this: &Object, _: Sel, size: NSSize) {
1040 let window_state = unsafe { get_window_state(this) };
1041 let window_state_borrow = window_state.as_ref().borrow();
1042
1043 if window_state_borrow.size() == vec2f(size.width as f32, size.height as f32) {
1044 return;
1045 }
1046
1047 unsafe {
1048 let _: () = msg_send![super(this, class!(NSView)), setFrameSize: size];
1049 }
1050
1051 let scale_factor = window_state_borrow.scale_factor() as f64;
1052 let drawable_size: NSSize = NSSize {
1053 width: size.width * scale_factor,
1054 height: size.height * scale_factor,
1055 };
1056
1057 unsafe {
1058 let _: () = msg_send![window_state_borrow.layer, setDrawableSize: drawable_size];
1059 }
1060
1061 drop(window_state_borrow);
1062 let mut window_state_borrow = window_state.borrow_mut();
1063 if let Some(mut callback) = window_state_borrow.resize_callback.take() {
1064 drop(window_state_borrow);
1065 callback();
1066 window_state.borrow_mut().resize_callback = Some(callback);
1067 };
1068}
1069
1070extern "C" fn display_layer(this: &Object, _: Sel, _: id) {
1071 unsafe {
1072 let window_state = get_window_state(this);
1073 let mut window_state = window_state.as_ref().borrow_mut();
1074
1075 if let Some(scene) = window_state.scene_to_render.take() {
1076 let drawable: &metal::MetalDrawableRef = msg_send![window_state.layer, nextDrawable];
1077 let command_queue = window_state.command_queue.clone();
1078 let command_buffer = command_queue.new_command_buffer();
1079
1080 let size = window_state.size();
1081 let scale_factor = window_state.scale_factor();
1082
1083 window_state.renderer.render(
1084 &scene,
1085 size * scale_factor,
1086 command_buffer,
1087 drawable.texture(),
1088 );
1089
1090 command_buffer.commit();
1091 command_buffer.wait_until_completed();
1092 drawable.present();
1093 };
1094 }
1095}
1096
1097extern "C" fn valid_attributes_for_marked_text(_: &Object, _: Sel) -> id {
1098 unsafe { msg_send![class!(NSArray), array] }
1099}
1100
1101extern "C" fn has_marked_text(this: &Object, _: Sel) -> BOOL {
1102 with_input_handler(this, |input_handler| input_handler.marked_text_range())
1103 .flatten()
1104 .is_some() as BOOL
1105}
1106
1107extern "C" fn marked_range(this: &Object, _: Sel) -> NSRange {
1108 with_input_handler(this, |input_handler| input_handler.marked_text_range())
1109 .flatten()
1110 .map_or(NSRange::invalid(), |range| range.into())
1111}
1112
1113extern "C" fn selected_range(this: &Object, _: Sel) -> NSRange {
1114 with_input_handler(this, |input_handler| input_handler.selected_text_range())
1115 .flatten()
1116 .map_or(NSRange::invalid(), |range| range.into())
1117}
1118
1119extern "C" fn first_rect_for_character_range(
1120 this: &Object,
1121 _: Sel,
1122 range: NSRange,
1123 _: id,
1124) -> NSRect {
1125 let frame = unsafe {
1126 let window = get_window_state(this).borrow().native_window;
1127 NSView::frame(window)
1128 };
1129
1130 with_input_handler(this, |input_handler| {
1131 input_handler.rect_for_range(range.to_range()?)
1132 })
1133 .flatten()
1134 .map_or(
1135 NSRect::new(NSPoint::new(0., 0.), NSSize::new(0., 0.)),
1136 |rect| {
1137 NSRect::new(
1138 NSPoint::new(
1139 frame.origin.x + rect.origin_x() as f64,
1140 frame.origin.y + frame.size.height - rect.origin_y() as f64,
1141 ),
1142 NSSize::new(rect.width() as f64, rect.height() as f64),
1143 )
1144 },
1145 )
1146}
1147
1148extern "C" fn insert_text(this: &Object, _: Sel, text: id, replacement_range: NSRange) {
1149 unsafe {
1150 let window_state = get_window_state(this);
1151 let mut window_state_borrow = window_state.borrow_mut();
1152 let pending_key_down = window_state_borrow.pending_key_down.take();
1153 drop(window_state_borrow);
1154
1155 let is_attributed_string: BOOL =
1156 msg_send![text, isKindOfClass: [class!(NSAttributedString)]];
1157 let text: id = if is_attributed_string == YES {
1158 msg_send![text, string]
1159 } else {
1160 text
1161 };
1162 let text = CStr::from_ptr(text.UTF8String() as *mut c_char)
1163 .to_str()
1164 .unwrap();
1165 let replacement_range = replacement_range.to_range();
1166
1167 let is_composing =
1168 with_input_handler(this, |input_handler| input_handler.marked_text_range())
1169 .flatten()
1170 .is_some();
1171
1172 if is_composing || text.chars().count() > 1 || pending_key_down.is_none() {
1173 with_input_handler(this, |input_handler| {
1174 input_handler.replace_text_in_range(replacement_range, text)
1175 });
1176 } else {
1177 let mut pending_key_down = pending_key_down.unwrap();
1178 pending_key_down.1 = Some(InsertText {
1179 replacement_range,
1180 text: text.to_string(),
1181 });
1182 window_state.borrow_mut().pending_key_down = Some(pending_key_down);
1183 }
1184 }
1185}
1186
1187extern "C" fn set_marked_text(
1188 this: &Object,
1189 _: Sel,
1190 text: id,
1191 selected_range: NSRange,
1192 replacement_range: NSRange,
1193) {
1194 unsafe {
1195 get_window_state(this).borrow_mut().pending_key_down.take();
1196
1197 let is_attributed_string: BOOL =
1198 msg_send![text, isKindOfClass: [class!(NSAttributedString)]];
1199 let text: id = if is_attributed_string == YES {
1200 msg_send![text, string]
1201 } else {
1202 text
1203 };
1204 let selected_range = selected_range.to_range();
1205 let replacement_range = replacement_range.to_range();
1206 let text = CStr::from_ptr(text.UTF8String() as *mut c_char)
1207 .to_str()
1208 .unwrap();
1209
1210 with_input_handler(this, |input_handler| {
1211 input_handler.replace_and_mark_text_in_range(replacement_range, text, selected_range);
1212 });
1213 }
1214}
1215
1216extern "C" fn unmark_text(this: &Object, _: Sel) {
1217 with_input_handler(this, |input_handler| input_handler.unmark_text());
1218}
1219
1220extern "C" fn attributed_substring_for_proposed_range(
1221 this: &Object,
1222 _: Sel,
1223 range: NSRange,
1224 _actual_range: *mut c_void,
1225) -> id {
1226 with_input_handler(this, |input_handler| {
1227 let range = range.to_range()?;
1228 if range.is_empty() {
1229 return None;
1230 }
1231
1232 let selected_text = input_handler.text_for_range(range)?;
1233 unsafe {
1234 let string: id = msg_send![class!(NSAttributedString), alloc];
1235 let string: id = msg_send![string, initWithString: ns_string(&selected_text)];
1236 Some(string)
1237 }
1238 })
1239 .flatten()
1240 .unwrap_or(nil)
1241}
1242
1243extern "C" fn do_command_by_selector(_: &Object, _: Sel, _: Sel) {}
1244
1245async fn synthetic_drag(
1246 window_state: Weak<RefCell<WindowState>>,
1247 drag_id: usize,
1248 event: MouseMovedEvent,
1249) {
1250 loop {
1251 Timer::after(Duration::from_millis(16)).await;
1252 if let Some(window_state) = window_state.upgrade() {
1253 let mut window_state_borrow = window_state.borrow_mut();
1254 if window_state_borrow.synthetic_drag_counter == drag_id {
1255 if let Some(mut callback) = window_state_borrow.event_callback.take() {
1256 drop(window_state_borrow);
1257 callback(Event::MouseMoved(event));
1258 window_state.borrow_mut().event_callback = Some(callback);
1259 }
1260 } else {
1261 break;
1262 }
1263 }
1264 }
1265}
1266
1267unsafe fn ns_string(string: &str) -> id {
1268 NSString::alloc(nil).init_str(string).autorelease()
1269}
1270
1271fn with_input_handler<F, R>(window: &Object, f: F) -> Option<R>
1272where
1273 F: FnOnce(&mut dyn InputHandler) -> R,
1274{
1275 let window_state = unsafe { get_window_state(window) };
1276 let mut window_state_borrow = window_state.as_ref().borrow_mut();
1277 if let Some(mut input_handler) = window_state_borrow.input_handler.take() {
1278 drop(window_state_borrow);
1279 let result = f(input_handler.as_mut());
1280 window_state.borrow_mut().input_handler = Some(input_handler);
1281 Some(result)
1282 } else {
1283 None
1284 }
1285}