1use crate::{
2 executor,
3 geometry::{
4 rect::RectF,
5 vector::{vec2f, Vector2F},
6 },
7 keymap::Keystroke,
8 mac::platform::NSViewLayerContentsRedrawDuringViewResize,
9 platform::{
10 self,
11 mac::{geometry::RectFExt, renderer::Renderer},
12 Event, WindowBounds,
13 },
14 InputHandler, KeyDownEvent, ModifiersChangedEvent, MouseButton, MouseButtonEvent,
15 MouseMovedEvent, Scene, WindowKind,
16};
17use block::ConcreteBlock;
18use cocoa::{
19 appkit::{
20 CGPoint, NSApplication, NSBackingStoreBuffered, NSScreen, NSView, NSViewHeightSizable,
21 NSViewWidthSizable, NSWindow, NSWindowButton, NSWindowCollectionBehavior,
22 NSWindowStyleMask,
23 },
24 base::{id, nil},
25 foundation::{
26 NSAutoreleasePool, NSInteger, NSNotFound, NSPoint, NSRect, NSSize, NSString, NSUInteger,
27 },
28};
29use core_graphics::display::CGRect;
30use ctor::ctor;
31use foreign_types::ForeignTypeRef;
32use objc::{
33 class,
34 declare::ClassDecl,
35 msg_send,
36 runtime::{Class, Object, Protocol, Sel, BOOL, NO, YES},
37 sel, sel_impl,
38};
39use postage::oneshot;
40use smol::Timer;
41use std::{
42 any::Any,
43 cell::{Cell, RefCell},
44 convert::TryInto,
45 ffi::{c_void, CStr},
46 mem,
47 ops::Range,
48 os::raw::c_char,
49 ptr,
50 rc::{Rc, Weak},
51 sync::Arc,
52 time::Duration,
53};
54
55const WINDOW_STATE_IVAR: &str = "windowState";
56
57static mut WINDOW_CLASS: *const Class = ptr::null();
58static mut PANEL_CLASS: *const Class = ptr::null();
59static mut VIEW_CLASS: *const Class = ptr::null();
60
61#[allow(non_upper_case_globals)]
62const NSWindowStyleMaskNonactivatingPanel: NSWindowStyleMask =
63 unsafe { NSWindowStyleMask::from_bits_unchecked(1 << 7) };
64#[allow(non_upper_case_globals)]
65const NSNormalWindowLevel: NSInteger = 0;
66#[allow(non_upper_case_globals)]
67const NSPopUpWindowLevel: NSInteger = 101;
68#[allow(non_upper_case_globals)]
69const NSTrackingMouseMoved: NSUInteger = 0x02;
70#[allow(non_upper_case_globals)]
71const NSTrackingActiveAlways: NSUInteger = 0x80;
72#[allow(non_upper_case_globals)]
73const NSTrackingInVisibleRect: NSUInteger = 0x200;
74#[allow(non_upper_case_globals)]
75const NSWindowAnimationBehaviorUtilityWindow: NSInteger = 4;
76
77#[repr(C)]
78#[derive(Copy, Clone, Debug)]
79struct NSRange {
80 pub location: NSUInteger,
81 pub length: NSUInteger,
82}
83
84impl NSRange {
85 fn invalid() -> Self {
86 Self {
87 location: NSNotFound as NSUInteger,
88 length: 0,
89 }
90 }
91
92 fn is_valid(&self) -> bool {
93 self.location != NSNotFound as NSUInteger
94 }
95
96 fn to_range(self) -> Option<Range<usize>> {
97 if self.is_valid() {
98 let start = self.location as usize;
99 let end = start + self.length as usize;
100 Some(start..end)
101 } else {
102 None
103 }
104 }
105}
106
107impl From<Range<usize>> for NSRange {
108 fn from(range: Range<usize>) -> Self {
109 NSRange {
110 location: range.start as NSUInteger,
111 length: range.len() as NSUInteger,
112 }
113 }
114}
115
116unsafe impl objc::Encode for NSRange {
117 fn encode() -> objc::Encoding {
118 let encoding = format!(
119 "{{NSRange={}{}}}",
120 NSUInteger::encode().as_str(),
121 NSUInteger::encode().as_str()
122 );
123 unsafe { objc::Encoding::from_str(&encoding) }
124 }
125}
126
127#[ctor]
128unsafe fn build_classes() {
129 WINDOW_CLASS = build_window_class("GPUIWindow", class!(NSWindow));
130 PANEL_CLASS = build_window_class("GPUIPanel", class!(NSPanel));
131 VIEW_CLASS = {
132 let mut decl = ClassDecl::new("GPUIView", class!(NSView)).unwrap();
133 decl.add_ivar::<*mut c_void>(WINDOW_STATE_IVAR);
134
135 decl.add_method(sel!(dealloc), dealloc_view as extern "C" fn(&Object, Sel));
136
137 decl.add_method(
138 sel!(performKeyEquivalent:),
139 handle_key_equivalent as extern "C" fn(&Object, Sel, id) -> BOOL,
140 );
141 decl.add_method(
142 sel!(keyDown:),
143 handle_key_down as extern "C" fn(&Object, Sel, id),
144 );
145 decl.add_method(
146 sel!(mouseDown:),
147 handle_view_event as extern "C" fn(&Object, Sel, id),
148 );
149 decl.add_method(
150 sel!(mouseUp:),
151 handle_view_event as extern "C" fn(&Object, Sel, id),
152 );
153 decl.add_method(
154 sel!(rightMouseDown:),
155 handle_view_event as extern "C" fn(&Object, Sel, id),
156 );
157 decl.add_method(
158 sel!(rightMouseUp:),
159 handle_view_event as extern "C" fn(&Object, Sel, id),
160 );
161 decl.add_method(
162 sel!(otherMouseDown:),
163 handle_view_event as extern "C" fn(&Object, Sel, id),
164 );
165 decl.add_method(
166 sel!(otherMouseUp:),
167 handle_view_event as extern "C" fn(&Object, Sel, id),
168 );
169 decl.add_method(
170 sel!(mouseMoved:),
171 handle_view_event as extern "C" fn(&Object, Sel, id),
172 );
173 decl.add_method(
174 sel!(mouseDragged:),
175 handle_view_event as extern "C" fn(&Object, Sel, id),
176 );
177 decl.add_method(
178 sel!(scrollWheel:),
179 handle_view_event as extern "C" fn(&Object, Sel, id),
180 );
181 decl.add_method(
182 sel!(flagsChanged:),
183 handle_view_event as extern "C" fn(&Object, Sel, id),
184 );
185 decl.add_method(
186 sel!(cancelOperation:),
187 cancel_operation as extern "C" fn(&Object, Sel, id),
188 );
189
190 decl.add_method(
191 sel!(makeBackingLayer),
192 make_backing_layer as extern "C" fn(&Object, Sel) -> id,
193 );
194
195 decl.add_protocol(Protocol::get("CALayerDelegate").unwrap());
196 decl.add_method(
197 sel!(viewDidChangeBackingProperties),
198 view_did_change_backing_properties as extern "C" fn(&Object, Sel),
199 );
200 decl.add_method(
201 sel!(setFrameSize:),
202 set_frame_size as extern "C" fn(&Object, Sel, NSSize),
203 );
204 decl.add_method(
205 sel!(displayLayer:),
206 display_layer as extern "C" fn(&Object, Sel, id),
207 );
208
209 decl.add_protocol(Protocol::get("NSTextInputClient").unwrap());
210 decl.add_method(
211 sel!(validAttributesForMarkedText),
212 valid_attributes_for_marked_text as extern "C" fn(&Object, Sel) -> id,
213 );
214 decl.add_method(
215 sel!(hasMarkedText),
216 has_marked_text as extern "C" fn(&Object, Sel) -> BOOL,
217 );
218 decl.add_method(
219 sel!(markedRange),
220 marked_range as extern "C" fn(&Object, Sel) -> NSRange,
221 );
222 decl.add_method(
223 sel!(selectedRange),
224 selected_range as extern "C" fn(&Object, Sel) -> NSRange,
225 );
226 decl.add_method(
227 sel!(firstRectForCharacterRange:actualRange:),
228 first_rect_for_character_range as extern "C" fn(&Object, Sel, NSRange, id) -> NSRect,
229 );
230 decl.add_method(
231 sel!(insertText:replacementRange:),
232 insert_text as extern "C" fn(&Object, Sel, id, NSRange),
233 );
234 decl.add_method(
235 sel!(setMarkedText:selectedRange:replacementRange:),
236 set_marked_text as extern "C" fn(&Object, Sel, id, NSRange, NSRange),
237 );
238 decl.add_method(sel!(unmarkText), unmark_text as extern "C" fn(&Object, Sel));
239 decl.add_method(
240 sel!(attributedSubstringForProposedRange:actualRange:),
241 attributed_substring_for_proposed_range
242 as extern "C" fn(&Object, Sel, NSRange, *mut c_void) -> id,
243 );
244 decl.add_method(
245 sel!(viewDidChangeEffectiveAppearance),
246 view_did_change_effective_appearance as extern "C" fn(&Object, Sel),
247 );
248
249 // Suppress beep on keystrokes with modifier keys.
250 decl.add_method(
251 sel!(doCommandBySelector:),
252 do_command_by_selector as extern "C" fn(&Object, Sel, Sel),
253 );
254
255 decl.register()
256 };
257}
258
259unsafe fn build_window_class(name: &'static str, superclass: &Class) -> *const Class {
260 let mut decl = ClassDecl::new(name, superclass).unwrap();
261 decl.add_ivar::<*mut c_void>(WINDOW_STATE_IVAR);
262 decl.add_method(sel!(dealloc), dealloc_window as extern "C" fn(&Object, Sel));
263 decl.add_method(
264 sel!(canBecomeMainWindow),
265 yes as extern "C" fn(&Object, Sel) -> BOOL,
266 );
267 decl.add_method(
268 sel!(canBecomeKeyWindow),
269 yes as extern "C" fn(&Object, Sel) -> BOOL,
270 );
271 decl.add_method(
272 sel!(sendEvent:),
273 send_event as extern "C" fn(&Object, Sel, id),
274 );
275 decl.add_method(
276 sel!(windowDidResize:),
277 window_did_resize as extern "C" fn(&Object, Sel, id),
278 );
279 decl.add_method(
280 sel!(windowWillEnterFullScreen:),
281 window_will_enter_fullscreen as extern "C" fn(&Object, Sel, id),
282 );
283 decl.add_method(
284 sel!(windowWillExitFullScreen:),
285 window_will_exit_fullscreen as extern "C" fn(&Object, Sel, id),
286 );
287 decl.add_method(
288 sel!(windowDidBecomeKey:),
289 window_did_change_key_status as extern "C" fn(&Object, Sel, id),
290 );
291 decl.add_method(
292 sel!(windowDidResignKey:),
293 window_did_change_key_status as extern "C" fn(&Object, Sel, id),
294 );
295 decl.add_method(
296 sel!(windowShouldClose:),
297 window_should_close as extern "C" fn(&Object, Sel, id) -> BOOL,
298 );
299 decl.add_method(sel!(close), close_window as extern "C" fn(&Object, Sel));
300 decl.register()
301}
302
303pub struct Window(Rc<RefCell<WindowState>>);
304
305///Used to track what the IME does when we send it a keystroke.
306///This is only used to handle the case where the IME mysteriously
307///swallows certain keys.
308///
309///Basically a direct copy of the approach that WezTerm uses in:
310///github.com/wez/wezterm : d5755f3e : window/src/os/macos/window.rs
311enum ImeState {
312 Continue,
313 Acted,
314 None,
315}
316
317struct WindowState {
318 id: usize,
319 native_window: id,
320 event_callback: Option<Box<dyn FnMut(Event) -> bool>>,
321 activate_callback: Option<Box<dyn FnMut(bool)>>,
322 resize_callback: Option<Box<dyn FnMut()>>,
323 fullscreen_callback: Option<Box<dyn FnMut(bool)>>,
324 should_close_callback: Option<Box<dyn FnMut() -> bool>>,
325 close_callback: Option<Box<dyn FnOnce()>>,
326 appearance_changed_callback: Option<Box<dyn FnMut()>>,
327 input_handler: Option<Box<dyn InputHandler>>,
328 pending_key_down: Option<(KeyDownEvent, Option<InsertText>)>,
329 performed_key_equivalent: bool,
330 synthetic_drag_counter: usize,
331 executor: Rc<executor::Foreground>,
332 scene_to_render: Option<Scene>,
333 renderer: Renderer,
334 last_fresh_keydown: Option<Keystroke>,
335 traffic_light_position: Option<Vector2F>,
336 previous_modifiers_changed_event: Option<Event>,
337 //State tracking what the IME did after the last request
338 ime_state: ImeState,
339 //Retains the last IME Text
340 ime_text: Option<String>,
341}
342
343struct InsertText {
344 replacement_range: Option<Range<usize>>,
345 text: String,
346}
347
348impl Window {
349 pub fn open(
350 id: usize,
351 options: platform::WindowOptions,
352 executor: Rc<executor::Foreground>,
353 fonts: Arc<dyn platform::FontSystem>,
354 ) -> Self {
355 unsafe {
356 let pool = NSAutoreleasePool::new(nil);
357
358 let mut style_mask;
359 if let Some(titlebar) = options.titlebar.as_ref() {
360 style_mask = NSWindowStyleMask::NSClosableWindowMask
361 | NSWindowStyleMask::NSMiniaturizableWindowMask
362 | NSWindowStyleMask::NSResizableWindowMask
363 | NSWindowStyleMask::NSTitledWindowMask;
364
365 if titlebar.appears_transparent {
366 style_mask |= NSWindowStyleMask::NSFullSizeContentViewWindowMask;
367 }
368 } else {
369 style_mask = NSWindowStyleMask::NSTitledWindowMask
370 | NSWindowStyleMask::NSFullSizeContentViewWindowMask;
371 }
372
373 let native_window: id = match options.kind {
374 WindowKind::Normal => msg_send![WINDOW_CLASS, alloc],
375 WindowKind::PopUp => {
376 style_mask |= NSWindowStyleMaskNonactivatingPanel;
377 msg_send![PANEL_CLASS, alloc]
378 }
379 };
380 let native_window = native_window.initWithContentRect_styleMask_backing_defer_(
381 RectF::new(Default::default(), vec2f(1024., 768.)).to_ns_rect(),
382 style_mask,
383 NSBackingStoreBuffered,
384 NO,
385 );
386 assert!(!native_window.is_null());
387
388 let screen = native_window.screen();
389 match options.bounds {
390 WindowBounds::Maximized => {
391 native_window.setFrame_display_(screen.visibleFrame(), YES);
392 }
393 WindowBounds::Fixed(top_left_bounds) => {
394 let frame = screen.visibleFrame();
395 let bottom_left_bounds = RectF::new(
396 vec2f(
397 top_left_bounds.origin_x(),
398 frame.size.height as f32
399 - top_left_bounds.origin_y()
400 - top_left_bounds.height(),
401 ),
402 top_left_bounds.size(),
403 );
404 native_window.setFrame_display_(bottom_left_bounds.to_ns_rect(), YES);
405 }
406 }
407
408 let native_view: id = msg_send![VIEW_CLASS, alloc];
409 let native_view = NSView::init(native_view);
410 assert!(!native_view.is_null());
411
412 let window = Self(Rc::new(RefCell::new(WindowState {
413 id,
414 native_window,
415 event_callback: None,
416 resize_callback: None,
417 should_close_callback: None,
418 close_callback: None,
419 activate_callback: None,
420 fullscreen_callback: None,
421 appearance_changed_callback: None,
422 input_handler: None,
423 pending_key_down: None,
424 performed_key_equivalent: false,
425 synthetic_drag_counter: 0,
426 executor,
427 scene_to_render: Default::default(),
428 renderer: Renderer::new(true, fonts),
429 last_fresh_keydown: None,
430 traffic_light_position: options
431 .titlebar
432 .as_ref()
433 .and_then(|titlebar| titlebar.traffic_light_position),
434 previous_modifiers_changed_event: None,
435 ime_state: ImeState::None,
436 ime_text: None,
437 })));
438
439 (*native_window).set_ivar(
440 WINDOW_STATE_IVAR,
441 Rc::into_raw(window.0.clone()) as *const c_void,
442 );
443 native_window.setDelegate_(native_window);
444 (*native_view).set_ivar(
445 WINDOW_STATE_IVAR,
446 Rc::into_raw(window.0.clone()) as *const c_void,
447 );
448
449 if let Some(title) = options.titlebar.as_ref().and_then(|t| t.title) {
450 native_window.setTitle_(NSString::alloc(nil).init_str(title));
451 }
452
453 native_window.setMovable_(options.is_movable as BOOL);
454
455 if options
456 .titlebar
457 .map_or(true, |titlebar| titlebar.appears_transparent)
458 {
459 native_window.setTitlebarAppearsTransparent_(YES);
460 }
461
462 let tracking_area: id = msg_send![class!(NSTrackingArea), alloc];
463 let _: () = msg_send![
464 tracking_area,
465 initWithRect: NSRect::new(NSPoint::new(0., 0.), NSSize::new(0., 0.))
466 options: NSTrackingMouseMoved | NSTrackingActiveAlways | NSTrackingInVisibleRect
467 owner: native_view
468 userInfo: nil
469 ];
470 let _: () = msg_send![native_view, addTrackingArea: tracking_area.autorelease()];
471
472 native_view.setAutoresizingMask_(NSViewWidthSizable | NSViewHeightSizable);
473 native_view.setWantsBestResolutionOpenGLSurface_(YES);
474
475 // From winit crate: On Mojave, views automatically become layer-backed shortly after
476 // being added to a native_window. Changing the layer-backedness of a view breaks the
477 // association between the view and its associated OpenGL context. To work around this,
478 // on we explicitly make the view layer-backed up front so that AppKit doesn't do it
479 // itself and break the association with its context.
480 native_view.setWantsLayer(YES);
481 let _: () = msg_send![
482 native_view,
483 setLayerContentsRedrawPolicy: NSViewLayerContentsRedrawDuringViewResize
484 ];
485
486 native_window.setContentView_(native_view.autorelease());
487 native_window.makeFirstResponder_(native_view);
488
489 if options.center {
490 native_window.center();
491 }
492
493 match options.kind {
494 WindowKind::Normal => native_window.setLevel_(NSNormalWindowLevel),
495 WindowKind::PopUp => {
496 native_window.setLevel_(NSPopUpWindowLevel);
497 let _: () = msg_send![
498 native_window,
499 setAnimationBehavior: NSWindowAnimationBehaviorUtilityWindow
500 ];
501 native_window.setCollectionBehavior_(
502 NSWindowCollectionBehavior::NSWindowCollectionBehaviorCanJoinAllSpaces |
503 NSWindowCollectionBehavior::NSWindowCollectionBehaviorFullScreenAuxiliary
504 );
505 }
506 }
507 native_window.makeKeyAndOrderFront_(nil);
508
509 window.0.borrow().move_traffic_light();
510 pool.drain();
511
512 window
513 }
514 }
515
516 pub fn key_window_id() -> Option<usize> {
517 unsafe {
518 let app = NSApplication::sharedApplication(nil);
519 let key_window: id = msg_send![app, keyWindow];
520 if msg_send![key_window, isKindOfClass: WINDOW_CLASS] {
521 let id = get_window_state(&*key_window).borrow().id;
522 Some(id)
523 } else {
524 None
525 }
526 }
527 }
528}
529
530impl Drop for Window {
531 fn drop(&mut self) {
532 let this = self.0.borrow();
533 let window = this.native_window;
534 this.executor
535 .spawn(async move {
536 unsafe {
537 window.close();
538 }
539 })
540 .detach();
541 }
542}
543
544impl platform::Window for Window {
545 fn as_any_mut(&mut self) -> &mut dyn Any {
546 self
547 }
548
549 fn on_event(&mut self, callback: Box<dyn FnMut(Event) -> bool>) {
550 self.0.as_ref().borrow_mut().event_callback = Some(callback);
551 }
552
553 fn on_resize(&mut self, callback: Box<dyn FnMut()>) {
554 self.0.as_ref().borrow_mut().resize_callback = Some(callback);
555 }
556
557 fn on_fullscreen(&mut self, callback: Box<dyn FnMut(bool)>) {
558 self.0.as_ref().borrow_mut().fullscreen_callback = Some(callback);
559 }
560
561 fn on_should_close(&mut self, callback: Box<dyn FnMut() -> bool>) {
562 self.0.as_ref().borrow_mut().should_close_callback = Some(callback);
563 }
564
565 fn on_close(&mut self, callback: Box<dyn FnOnce()>) {
566 self.0.as_ref().borrow_mut().close_callback = Some(callback);
567 }
568
569 fn on_active_status_change(&mut self, callback: Box<dyn FnMut(bool)>) {
570 self.0.as_ref().borrow_mut().activate_callback = Some(callback);
571 }
572
573 fn set_input_handler(&mut self, input_handler: Box<dyn InputHandler>) {
574 self.0.as_ref().borrow_mut().input_handler = Some(input_handler);
575 }
576
577 fn prompt(
578 &self,
579 level: platform::PromptLevel,
580 msg: &str,
581 answers: &[&str],
582 ) -> oneshot::Receiver<usize> {
583 unsafe {
584 let alert: id = msg_send![class!(NSAlert), alloc];
585 let alert: id = msg_send![alert, init];
586 let alert_style = match level {
587 platform::PromptLevel::Info => 1,
588 platform::PromptLevel::Warning => 0,
589 platform::PromptLevel::Critical => 2,
590 };
591 let _: () = msg_send![alert, setAlertStyle: alert_style];
592 let _: () = msg_send![alert, setMessageText: ns_string(msg)];
593 for (ix, answer) in answers.iter().enumerate() {
594 let button: id = msg_send![alert, addButtonWithTitle: ns_string(answer)];
595 let _: () = msg_send![button, setTag: ix as NSInteger];
596 }
597 let (done_tx, done_rx) = oneshot::channel();
598 let done_tx = Cell::new(Some(done_tx));
599 let block = ConcreteBlock::new(move |answer: NSInteger| {
600 if let Some(mut done_tx) = done_tx.take() {
601 let _ = postage::sink::Sink::try_send(&mut done_tx, answer.try_into().unwrap());
602 }
603 });
604 let block = block.copy();
605 let native_window = self.0.borrow().native_window;
606 self.0
607 .borrow()
608 .executor
609 .spawn(async move {
610 let _: () = msg_send![
611 alert,
612 beginSheetModalForWindow: native_window
613 completionHandler: block
614 ];
615 })
616 .detach();
617
618 done_rx
619 }
620 }
621
622 fn activate(&self) {
623 let window = self.0.borrow().native_window;
624 self.0
625 .borrow()
626 .executor
627 .spawn(async move {
628 unsafe {
629 let _: () = msg_send![window, makeKeyAndOrderFront: nil];
630 }
631 })
632 .detach();
633 }
634
635 fn set_title(&mut self, title: &str) {
636 unsafe {
637 let app = NSApplication::sharedApplication(nil);
638 let window = self.0.borrow().native_window;
639 let title = ns_string(title);
640 msg_send![app, changeWindowsItem:window title:title filename:false]
641 }
642 }
643
644 fn set_edited(&mut self, edited: bool) {
645 unsafe {
646 let window = self.0.borrow().native_window;
647 msg_send![window, setDocumentEdited: edited as BOOL]
648 }
649
650 // Changing the document edited state resets the traffic light position,
651 // so we have to move it again.
652 self.0.borrow().move_traffic_light();
653 }
654
655 fn show_character_palette(&self) {
656 unsafe {
657 let app = NSApplication::sharedApplication(nil);
658 let window = self.0.borrow().native_window;
659 let _: () = msg_send![app, orderFrontCharacterPalette: window];
660 }
661 }
662
663 fn minimize(&self) {
664 let window = self.0.borrow().native_window;
665 unsafe {
666 window.miniaturize_(nil);
667 }
668 }
669
670 fn zoom(&self) {
671 let this = self.0.borrow();
672 let window = this.native_window;
673 this.executor
674 .spawn(async move {
675 unsafe {
676 window.zoom_(nil);
677 }
678 })
679 .detach();
680 }
681
682 fn toggle_full_screen(&self) {
683 let this = self.0.borrow();
684 let window = this.native_window;
685 this.executor
686 .spawn(async move {
687 unsafe {
688 window.toggleFullScreen_(nil);
689 }
690 })
691 .detach();
692 }
693
694 fn bounds(&self) -> RectF {
695 self.0.as_ref().borrow().bounds()
696 }
697
698 fn content_size(&self) -> Vector2F {
699 self.0.as_ref().borrow().content_size()
700 }
701
702 fn scale_factor(&self) -> f32 {
703 self.0.as_ref().borrow().scale_factor()
704 }
705
706 fn present_scene(&mut self, scene: Scene) {
707 self.0.as_ref().borrow_mut().present_scene(scene);
708 }
709
710 fn titlebar_height(&self) -> f32 {
711 self.0.as_ref().borrow().titlebar_height()
712 }
713
714 fn appearance(&self) -> crate::Appearance {
715 unsafe {
716 let appearance: id = msg_send![self.0.borrow().native_window, effectiveAppearance];
717 crate::Appearance::from_native(appearance)
718 }
719 }
720
721 fn on_appearance_changed(&mut self, callback: Box<dyn FnMut()>) {
722 self.0.borrow_mut().appearance_changed_callback = Some(callback);
723 }
724}
725
726impl WindowState {
727 fn move_traffic_light(&self) {
728 if let Some(traffic_light_position) = self.traffic_light_position {
729 let titlebar_height = self.titlebar_height();
730
731 unsafe {
732 let close_button: id = msg_send![
733 self.native_window,
734 standardWindowButton: NSWindowButton::NSWindowCloseButton
735 ];
736 let min_button: id = msg_send![
737 self.native_window,
738 standardWindowButton: NSWindowButton::NSWindowMiniaturizeButton
739 ];
740 let zoom_button: id = msg_send![
741 self.native_window,
742 standardWindowButton: NSWindowButton::NSWindowZoomButton
743 ];
744
745 let mut close_button_frame: CGRect = msg_send![close_button, frame];
746 let mut min_button_frame: CGRect = msg_send![min_button, frame];
747 let mut zoom_button_frame: CGRect = msg_send![zoom_button, frame];
748 let mut origin = vec2f(
749 traffic_light_position.x(),
750 titlebar_height
751 - traffic_light_position.y()
752 - close_button_frame.size.height as f32,
753 );
754 let button_spacing =
755 (min_button_frame.origin.x - close_button_frame.origin.x) as f32;
756
757 close_button_frame.origin = CGPoint::new(origin.x() as f64, origin.y() as f64);
758 let _: () = msg_send![close_button, setFrame: close_button_frame];
759 origin.set_x(origin.x() + button_spacing);
760
761 min_button_frame.origin = CGPoint::new(origin.x() as f64, origin.y() as f64);
762 let _: () = msg_send![min_button, setFrame: min_button_frame];
763 origin.set_x(origin.x() + button_spacing);
764
765 zoom_button_frame.origin = CGPoint::new(origin.x() as f64, origin.y() as f64);
766 let _: () = msg_send![zoom_button, setFrame: zoom_button_frame];
767 }
768 }
769 }
770
771 fn bounds(&self) -> RectF {
772 unsafe {
773 let screen_frame = self.native_window.screen().visibleFrame();
774 let window_frame = NSWindow::frame(self.native_window);
775 let origin = vec2f(
776 window_frame.origin.x as f32,
777 (window_frame.origin.y - screen_frame.size.height - window_frame.size.height)
778 as f32,
779 );
780 let size = vec2f(
781 window_frame.size.width as f32,
782 window_frame.size.height as f32,
783 );
784 RectF::new(origin, size)
785 }
786 }
787
788 fn content_size(&self) -> Vector2F {
789 let NSSize { width, height, .. } =
790 unsafe { NSView::frame(self.native_window.contentView()) }.size;
791 vec2f(width as f32, height as f32)
792 }
793
794 fn scale_factor(&self) -> f32 {
795 get_scale_factor(self.native_window)
796 }
797
798 fn titlebar_height(&self) -> f32 {
799 unsafe {
800 let frame = NSWindow::frame(self.native_window);
801 let content_layout_rect: CGRect = msg_send![self.native_window, contentLayoutRect];
802 (frame.size.height - content_layout_rect.size.height) as f32
803 }
804 }
805
806 fn present_scene(&mut self, scene: Scene) {
807 self.scene_to_render = Some(scene);
808 unsafe {
809 let _: () = msg_send![self.native_window.contentView(), setNeedsDisplay: YES];
810 }
811 }
812}
813
814fn get_scale_factor(native_window: id) -> f32 {
815 unsafe {
816 let screen: id = msg_send![native_window, screen];
817 NSScreen::backingScaleFactor(screen) as f32
818 }
819}
820
821unsafe fn get_window_state(object: &Object) -> Rc<RefCell<WindowState>> {
822 let raw: *mut c_void = *object.get_ivar(WINDOW_STATE_IVAR);
823 let rc1 = Rc::from_raw(raw as *mut RefCell<WindowState>);
824 let rc2 = rc1.clone();
825 mem::forget(rc1);
826 rc2
827}
828
829unsafe fn drop_window_state(object: &Object) {
830 let raw: *mut c_void = *object.get_ivar(WINDOW_STATE_IVAR);
831 Rc::from_raw(raw as *mut RefCell<WindowState>);
832}
833
834extern "C" fn yes(_: &Object, _: Sel) -> BOOL {
835 YES
836}
837
838extern "C" fn dealloc_window(this: &Object, _: Sel) {
839 unsafe {
840 drop_window_state(this);
841 let _: () = msg_send![super(this, class!(NSWindow)), dealloc];
842 }
843}
844
845extern "C" fn dealloc_view(this: &Object, _: Sel) {
846 unsafe {
847 drop_window_state(this);
848 let _: () = msg_send![super(this, class!(NSView)), dealloc];
849 }
850}
851
852extern "C" fn handle_key_equivalent(this: &Object, _: Sel, native_event: id) -> BOOL {
853 handle_key_event(this, native_event, true)
854}
855
856extern "C" fn handle_key_down(this: &Object, _: Sel, native_event: id) {
857 handle_key_event(this, native_event, false);
858}
859
860extern "C" fn handle_key_event(this: &Object, native_event: id, key_equivalent: bool) -> BOOL {
861 let window_state = unsafe { get_window_state(this) };
862
863 let mut window_state_borrow = window_state.as_ref().borrow_mut();
864
865 let event =
866 unsafe { Event::from_native(native_event, Some(window_state_borrow.content_size().y())) };
867
868 if let Some(event) = event {
869 if key_equivalent {
870 window_state_borrow.performed_key_equivalent = true;
871 } else if window_state_borrow.performed_key_equivalent {
872 return NO;
873 }
874
875 let function_is_held;
876 window_state_borrow.pending_key_down = match event {
877 Event::KeyDown(event) => {
878 let keydown = event.keystroke.clone();
879 // Ignore events from held-down keys after some of the initially-pressed keys
880 // were released.
881 if event.is_held {
882 if window_state_borrow.last_fresh_keydown.as_ref() != Some(&keydown) {
883 return YES;
884 }
885 } else {
886 window_state_borrow.last_fresh_keydown = Some(keydown);
887 }
888 function_is_held = event.keystroke.function;
889 Some((event, None))
890 }
891 _ => return NO,
892 };
893
894 drop(window_state_borrow);
895
896 if !function_is_held {
897 unsafe {
898 let input_context: id = msg_send![this, inputContext];
899 let _: BOOL = msg_send![input_context, handleEvent: native_event];
900 }
901 }
902
903 let mut handled = false;
904 let mut window_state_borrow = window_state.borrow_mut();
905 let ime_text = window_state_borrow.ime_text.clone();
906 if let Some((event, insert_text)) = window_state_borrow.pending_key_down.take() {
907 let is_held = event.is_held;
908 if let Some(mut callback) = window_state_borrow.event_callback.take() {
909 drop(window_state_borrow);
910
911 let is_composing =
912 with_input_handler(this, |input_handler| input_handler.marked_text_range())
913 .flatten()
914 .is_some();
915 if !is_composing {
916 handled = callback(Event::KeyDown(event));
917 }
918
919 if !handled {
920 if let Some(insert) = insert_text {
921 handled = true;
922 with_input_handler(this, |input_handler| {
923 input_handler
924 .replace_text_in_range(insert.replacement_range, &insert.text)
925 });
926 } else if !is_composing && is_held {
927 if let Some(last_insert_text) = ime_text {
928 //MacOS IME is a bit funky, and even when you've told it there's nothing to
929 //inter it will still swallow certain keys (e.g. 'f', 'j') and not others
930 //(e.g. 'n'). This is a problem for certain kinds of views, like the terminal
931 with_input_handler(this, |input_handler| {
932 if input_handler.selected_text_range().is_none() {
933 handled = true;
934 input_handler.replace_text_in_range(None, &last_insert_text)
935 }
936 });
937 }
938 }
939 }
940
941 window_state.borrow_mut().event_callback = Some(callback);
942 }
943 } else {
944 handled = true;
945 }
946
947 handled as BOOL
948 } else {
949 NO
950 }
951}
952
953extern "C" fn handle_view_event(this: &Object, _: Sel, native_event: id) {
954 let window_state = unsafe { get_window_state(this) };
955 let weak_window_state = Rc::downgrade(&window_state);
956 let mut window_state_borrow = window_state.as_ref().borrow_mut();
957
958 let event =
959 unsafe { Event::from_native(native_event, Some(window_state_borrow.content_size().y())) };
960 if let Some(event) = event {
961 match &event {
962 Event::MouseMoved(
963 event @ MouseMovedEvent {
964 pressed_button: Some(_),
965 ..
966 },
967 ) => {
968 window_state_borrow.synthetic_drag_counter += 1;
969 window_state_borrow
970 .executor
971 .spawn(synthetic_drag(
972 weak_window_state,
973 window_state_borrow.synthetic_drag_counter,
974 *event,
975 ))
976 .detach();
977 }
978 Event::MouseUp(MouseButtonEvent {
979 button: MouseButton::Left,
980 ..
981 }) => {
982 window_state_borrow.synthetic_drag_counter += 1;
983 }
984 Event::ModifiersChanged(ModifiersChangedEvent {
985 ctrl,
986 alt,
987 shift,
988 cmd,
989 }) => {
990 // Only raise modifiers changed event when they have actually changed
991 if let Some(Event::ModifiersChanged(ModifiersChangedEvent {
992 ctrl: prev_ctrl,
993 alt: prev_alt,
994 shift: prev_shift,
995 cmd: prev_cmd,
996 })) = &window_state_borrow.previous_modifiers_changed_event
997 {
998 if prev_ctrl == ctrl
999 && prev_alt == alt
1000 && prev_shift == shift
1001 && prev_cmd == cmd
1002 {
1003 return;
1004 }
1005 }
1006
1007 window_state_borrow.previous_modifiers_changed_event = Some(event.clone());
1008 }
1009 _ => {}
1010 }
1011
1012 if let Some(mut callback) = window_state_borrow.event_callback.take() {
1013 drop(window_state_borrow);
1014 callback(event);
1015 window_state.borrow_mut().event_callback = Some(callback);
1016 }
1017 }
1018}
1019
1020// Allows us to receive `cmd-.` (the shortcut for closing a dialog)
1021// https://bugs.eclipse.org/bugs/show_bug.cgi?id=300620#c6
1022extern "C" fn cancel_operation(this: &Object, _sel: Sel, _sender: id) {
1023 let window_state = unsafe { get_window_state(this) };
1024 let mut window_state_borrow = window_state.as_ref().borrow_mut();
1025
1026 let keystroke = Keystroke {
1027 cmd: true,
1028 ctrl: false,
1029 alt: false,
1030 shift: false,
1031 function: false,
1032 key: ".".into(),
1033 };
1034 let event = Event::KeyDown(KeyDownEvent {
1035 keystroke: keystroke.clone(),
1036 is_held: false,
1037 });
1038
1039 window_state_borrow.last_fresh_keydown = Some(keystroke);
1040 if let Some(mut callback) = window_state_borrow.event_callback.take() {
1041 drop(window_state_borrow);
1042 callback(event);
1043 window_state.borrow_mut().event_callback = Some(callback);
1044 }
1045}
1046
1047extern "C" fn send_event(this: &Object, _: Sel, native_event: id) {
1048 unsafe {
1049 let _: () = msg_send![super(this, class!(NSWindow)), sendEvent: native_event];
1050 get_window_state(this).borrow_mut().performed_key_equivalent = false;
1051 }
1052}
1053
1054extern "C" fn window_did_resize(this: &Object, _: Sel, _: id) {
1055 let window_state = unsafe { get_window_state(this) };
1056 window_state.as_ref().borrow().move_traffic_light();
1057}
1058
1059extern "C" fn window_will_enter_fullscreen(this: &Object, _: Sel, _: id) {
1060 window_fullscreen_changed(this, true);
1061}
1062
1063extern "C" fn window_will_exit_fullscreen(this: &Object, _: Sel, _: id) {
1064 window_fullscreen_changed(this, false);
1065}
1066
1067fn window_fullscreen_changed(this: &Object, is_fullscreen: bool) {
1068 let window_state = unsafe { get_window_state(this) };
1069 let mut window_state_borrow = window_state.as_ref().borrow_mut();
1070 if let Some(mut callback) = window_state_borrow.fullscreen_callback.take() {
1071 drop(window_state_borrow);
1072 callback(is_fullscreen);
1073 window_state.borrow_mut().fullscreen_callback = Some(callback);
1074 }
1075}
1076
1077extern "C" fn window_did_change_key_status(this: &Object, selector: Sel, _: id) {
1078 let window_state = unsafe { get_window_state(this) };
1079 let window_state_borrow = window_state.borrow();
1080 let is_active = unsafe { window_state_borrow.native_window.isKeyWindow() == YES };
1081
1082 // When opening a pop-up while the application isn't active, Cocoa sends a spurious
1083 // `windowDidBecomeKey` message to the previous key window even though that window
1084 // isn't actually key. This causes a bug if the application is later activated while
1085 // the pop-up is still open, making it impossible to activate the previous key window
1086 // even if the pop-up gets closed. The only way to activate it again is to de-activate
1087 // the app and re-activate it, which is a pretty bad UX.
1088 // The following code detects the spurious event and invokes `resignKeyWindow`:
1089 // in theory, we're not supposed to invoke this method manually but it balances out
1090 // the spurious `becomeKeyWindow` event and helps us work around that bug.
1091 if selector == sel!(windowDidBecomeKey:) {
1092 if !is_active {
1093 unsafe {
1094 let _: () = msg_send![window_state_borrow.native_window, resignKeyWindow];
1095 return;
1096 }
1097 }
1098 }
1099
1100 let executor = window_state_borrow.executor.clone();
1101 drop(window_state_borrow);
1102 executor
1103 .spawn(async move {
1104 let mut window_state_borrow = window_state.as_ref().borrow_mut();
1105 if let Some(mut callback) = window_state_borrow.activate_callback.take() {
1106 drop(window_state_borrow);
1107 callback(is_active);
1108 window_state.borrow_mut().activate_callback = Some(callback);
1109 };
1110 })
1111 .detach();
1112}
1113
1114extern "C" fn window_should_close(this: &Object, _: Sel, _: id) -> BOOL {
1115 let window_state = unsafe { get_window_state(this) };
1116 let mut window_state_borrow = window_state.as_ref().borrow_mut();
1117 if let Some(mut callback) = window_state_borrow.should_close_callback.take() {
1118 drop(window_state_borrow);
1119 let should_close = callback();
1120 window_state.borrow_mut().should_close_callback = Some(callback);
1121 should_close as BOOL
1122 } else {
1123 YES
1124 }
1125}
1126
1127extern "C" fn close_window(this: &Object, _: Sel) {
1128 unsafe {
1129 let close_callback = {
1130 let window_state = get_window_state(this);
1131 window_state
1132 .as_ref()
1133 .try_borrow_mut()
1134 .ok()
1135 .and_then(|mut window_state| window_state.close_callback.take())
1136 };
1137
1138 if let Some(callback) = close_callback {
1139 callback();
1140 }
1141
1142 let _: () = msg_send![super(this, class!(NSWindow)), close];
1143 }
1144}
1145
1146extern "C" fn make_backing_layer(this: &Object, _: Sel) -> id {
1147 let window_state = unsafe { get_window_state(this) };
1148 let window_state = window_state.as_ref().borrow();
1149 window_state.renderer.layer().as_ptr() as id
1150}
1151
1152extern "C" fn view_did_change_backing_properties(this: &Object, _: Sel) {
1153 let window_state = unsafe { get_window_state(this) };
1154 let mut window_state_borrow = window_state.as_ref().borrow_mut();
1155
1156 unsafe {
1157 let scale_factor = window_state_borrow.scale_factor() as f64;
1158 let size = window_state_borrow.content_size();
1159 let drawable_size: NSSize = NSSize {
1160 width: size.x() as f64 * scale_factor,
1161 height: size.y() as f64 * scale_factor,
1162 };
1163
1164 let _: () = msg_send![
1165 window_state_borrow.renderer.layer(),
1166 setContentsScale: scale_factor
1167 ];
1168 let _: () = msg_send![
1169 window_state_borrow.renderer.layer(),
1170 setDrawableSize: drawable_size
1171 ];
1172 }
1173
1174 if let Some(mut callback) = window_state_borrow.resize_callback.take() {
1175 drop(window_state_borrow);
1176 callback();
1177 window_state.as_ref().borrow_mut().resize_callback = Some(callback);
1178 };
1179}
1180
1181extern "C" fn set_frame_size(this: &Object, _: Sel, size: NSSize) {
1182 let window_state = unsafe { get_window_state(this) };
1183 let window_state_borrow = window_state.as_ref().borrow();
1184
1185 if window_state_borrow.content_size() == vec2f(size.width as f32, size.height as f32) {
1186 return;
1187 }
1188
1189 unsafe {
1190 let _: () = msg_send![super(this, class!(NSView)), setFrameSize: size];
1191 }
1192
1193 let scale_factor = window_state_borrow.scale_factor() as f64;
1194 let drawable_size: NSSize = NSSize {
1195 width: size.width * scale_factor,
1196 height: size.height * scale_factor,
1197 };
1198
1199 unsafe {
1200 let _: () = msg_send![
1201 window_state_borrow.renderer.layer(),
1202 setDrawableSize: drawable_size
1203 ];
1204 }
1205
1206 drop(window_state_borrow);
1207 let mut window_state_borrow = window_state.borrow_mut();
1208 if let Some(mut callback) = window_state_borrow.resize_callback.take() {
1209 drop(window_state_borrow);
1210 callback();
1211 window_state.borrow_mut().resize_callback = Some(callback);
1212 };
1213}
1214
1215extern "C" fn display_layer(this: &Object, _: Sel, _: id) {
1216 unsafe {
1217 let window_state = get_window_state(this);
1218 let mut window_state = window_state.as_ref().borrow_mut();
1219 if let Some(scene) = window_state.scene_to_render.take() {
1220 window_state.renderer.render(&scene);
1221 };
1222 }
1223}
1224
1225extern "C" fn valid_attributes_for_marked_text(_: &Object, _: Sel) -> id {
1226 unsafe { msg_send![class!(NSArray), array] }
1227}
1228
1229extern "C" fn has_marked_text(this: &Object, _: Sel) -> BOOL {
1230 with_input_handler(this, |input_handler| input_handler.marked_text_range())
1231 .flatten()
1232 .is_some() as BOOL
1233}
1234
1235extern "C" fn marked_range(this: &Object, _: Sel) -> NSRange {
1236 with_input_handler(this, |input_handler| input_handler.marked_text_range())
1237 .flatten()
1238 .map_or(NSRange::invalid(), |range| range.into())
1239}
1240
1241extern "C" fn selected_range(this: &Object, _: Sel) -> NSRange {
1242 with_input_handler(this, |input_handler| input_handler.selected_text_range())
1243 .flatten()
1244 .map_or(NSRange::invalid(), |range| range.into())
1245}
1246
1247extern "C" fn first_rect_for_character_range(
1248 this: &Object,
1249 _: Sel,
1250 range: NSRange,
1251 _: id,
1252) -> NSRect {
1253 let frame = unsafe {
1254 let window = get_window_state(this).borrow().native_window;
1255 NSView::frame(window)
1256 };
1257 with_input_handler(this, |input_handler| {
1258 input_handler.rect_for_range(range.to_range()?)
1259 })
1260 .flatten()
1261 .map_or(
1262 NSRect::new(NSPoint::new(0., 0.), NSSize::new(0., 0.)),
1263 |rect| {
1264 NSRect::new(
1265 NSPoint::new(
1266 frame.origin.x + rect.origin_x() as f64,
1267 frame.origin.y + frame.size.height - rect.origin_y() as f64,
1268 ),
1269 NSSize::new(rect.width() as f64, rect.height() as f64),
1270 )
1271 },
1272 )
1273}
1274
1275extern "C" fn insert_text(this: &Object, _: Sel, text: id, replacement_range: NSRange) {
1276 unsafe {
1277 let window_state = get_window_state(this);
1278 let mut window_state_borrow = window_state.borrow_mut();
1279 let pending_key_down = window_state_borrow.pending_key_down.take();
1280 drop(window_state_borrow);
1281
1282 let is_attributed_string: BOOL =
1283 msg_send![text, isKindOfClass: [class!(NSAttributedString)]];
1284 let text: id = if is_attributed_string == YES {
1285 msg_send![text, string]
1286 } else {
1287 text
1288 };
1289 let text = CStr::from_ptr(text.UTF8String() as *mut c_char)
1290 .to_str()
1291 .unwrap();
1292 let replacement_range = replacement_range.to_range();
1293
1294 window_state.borrow_mut().ime_text = Some(text.to_string());
1295 window_state.borrow_mut().ime_state = ImeState::Acted;
1296
1297 let is_composing =
1298 with_input_handler(this, |input_handler| input_handler.marked_text_range())
1299 .flatten()
1300 .is_some();
1301
1302 if is_composing || text.chars().count() > 1 || pending_key_down.is_none() {
1303 with_input_handler(this, |input_handler| {
1304 input_handler.replace_text_in_range(replacement_range, text)
1305 });
1306 } else {
1307 let mut pending_key_down = pending_key_down.unwrap();
1308 pending_key_down.1 = Some(InsertText {
1309 replacement_range,
1310 text: text.to_string(),
1311 });
1312 window_state.borrow_mut().pending_key_down = Some(pending_key_down);
1313 }
1314 }
1315}
1316
1317extern "C" fn set_marked_text(
1318 this: &Object,
1319 _: Sel,
1320 text: id,
1321 selected_range: NSRange,
1322 replacement_range: NSRange,
1323) {
1324 unsafe {
1325 let window_state = get_window_state(this);
1326 window_state.borrow_mut().pending_key_down.take();
1327
1328 let is_attributed_string: BOOL =
1329 msg_send![text, isKindOfClass: [class!(NSAttributedString)]];
1330 let text: id = if is_attributed_string == YES {
1331 msg_send![text, string]
1332 } else {
1333 text
1334 };
1335 let selected_range = selected_range.to_range();
1336 let replacement_range = replacement_range.to_range();
1337 let text = CStr::from_ptr(text.UTF8String() as *mut c_char)
1338 .to_str()
1339 .unwrap();
1340
1341 window_state.borrow_mut().ime_state = ImeState::Acted;
1342 window_state.borrow_mut().ime_text = Some(text.to_string());
1343
1344 with_input_handler(this, |input_handler| {
1345 input_handler.replace_and_mark_text_in_range(replacement_range, text, selected_range);
1346 });
1347 }
1348}
1349
1350extern "C" fn unmark_text(this: &Object, _: Sel) {
1351 unsafe {
1352 let state = get_window_state(this);
1353 let mut borrow = state.borrow_mut();
1354 borrow.ime_state = ImeState::Acted;
1355 borrow.ime_text.take();
1356 }
1357
1358 with_input_handler(this, |input_handler| input_handler.unmark_text());
1359}
1360
1361extern "C" fn attributed_substring_for_proposed_range(
1362 this: &Object,
1363 _: Sel,
1364 range: NSRange,
1365 _actual_range: *mut c_void,
1366) -> id {
1367 with_input_handler(this, |input_handler| {
1368 let range = range.to_range()?;
1369 if range.is_empty() {
1370 return None;
1371 }
1372
1373 let selected_text = input_handler.text_for_range(range)?;
1374 unsafe {
1375 let string: id = msg_send![class!(NSAttributedString), alloc];
1376 let string: id = msg_send![string, initWithString: ns_string(&selected_text)];
1377 Some(string)
1378 }
1379 })
1380 .flatten()
1381 .unwrap_or(nil)
1382}
1383
1384extern "C" fn do_command_by_selector(this: &Object, _: Sel, _: Sel) {
1385 unsafe {
1386 let state = get_window_state(this);
1387 let mut borrow = state.borrow_mut();
1388 borrow.ime_state = ImeState::Continue;
1389 borrow.ime_text.take();
1390 }
1391}
1392
1393extern "C" fn view_did_change_effective_appearance(this: &Object, _: Sel) {
1394 unsafe {
1395 let state = get_window_state(this);
1396 let mut state_borrow = state.as_ref().borrow_mut();
1397 if let Some(mut callback) = state_borrow.appearance_changed_callback.take() {
1398 drop(state_borrow);
1399 callback();
1400 state.borrow_mut().appearance_changed_callback = Some(callback);
1401 }
1402 }
1403}
1404
1405async fn synthetic_drag(
1406 window_state: Weak<RefCell<WindowState>>,
1407 drag_id: usize,
1408 event: MouseMovedEvent,
1409) {
1410 loop {
1411 Timer::after(Duration::from_millis(16)).await;
1412 if let Some(window_state) = window_state.upgrade() {
1413 let mut window_state_borrow = window_state.borrow_mut();
1414 if window_state_borrow.synthetic_drag_counter == drag_id {
1415 if let Some(mut callback) = window_state_borrow.event_callback.take() {
1416 drop(window_state_borrow);
1417 callback(Event::MouseMoved(event));
1418 window_state.borrow_mut().event_callback = Some(callback);
1419 }
1420 } else {
1421 break;
1422 }
1423 }
1424 }
1425}
1426
1427unsafe fn ns_string(string: &str) -> id {
1428 NSString::alloc(nil).init_str(string).autorelease()
1429}
1430
1431fn with_input_handler<F, R>(window: &Object, f: F) -> Option<R>
1432where
1433 F: FnOnce(&mut dyn InputHandler) -> R,
1434{
1435 let window_state = unsafe { get_window_state(window) };
1436 let mut window_state_borrow = window_state.as_ref().borrow_mut();
1437 if let Some(mut input_handler) = window_state_borrow.input_handler.take() {
1438 drop(window_state_borrow);
1439 let result = f(input_handler.as_mut());
1440 window_state.borrow_mut().input_handler = Some(input_handler);
1441 Some(result)
1442 } else {
1443 None
1444 }
1445}