1
  2
  3
  4
  5
  6
  7
  8
  9
 10
 11
 12
 13
 14
 15
 16
 17
 18
 19
 20
 21
 22
 23
 24
 25
 26
 27
 28
 29
 30
 31
 32
 33
 34
 35
 36
 37
 38
 39
 40
 41
 42
 43
 44
 45
 46
 47
 48
 49
 50
 51
 52
 53
 54
 55
 56
 57
 58
 59
 60
 61
 62
 63
 64
 65
 66
 67
 68
 69
 70
 71
 72
 73
 74
 75
 76
 77
 78
 79
 80
 81
 82
 83
 84
 85
 86
 87
 88
 89
 90
 91
 92
 93
 94
 95
 96
 97
 98
 99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
482
483
484
485
486
487
488
489
490
491
492
493
494
495
496
497
498
499
500
501
502
503
504
505
506
507
508
509
510
511
512
513
514
515
516
517
518
519
520
521
522
523
524
525
526
527
528
529
530
531
532
533
534
535
536
537
538
539
540
541
542
543
544
545
546
547
548
549
550
551
552
553
554
555
556
557
558
559
560
561
562
563
564
565
566
567
568
569
570
571
572
573
574
575
576
577
578
579
580
581
582
583
584
585
586
587
588
589
590
591
592
593
594
595
596
597
598
599
600
601
602
603
604
605
606
607
608
609
610
611
612
613
614
615
616
617
618
619
620
621
622
623
624
625
626
627
628
629
630
631
632
633
634
635
636
637
638
639
640
641
642
643
644
645
646
647
648
649
650
651
652
653
654
655
656
657
658
659
660
661
662
663
664
665
666
667
668
669
670
671
672
673
674
675
676
677
678
679
680
681
682
683
684
685
686
687
688
689
690
691
692
693
694
695
696
697
698
699
700
701
702
703
704
705
706
707
708
709
710
711
712
713
714
715
716
717
718
719
720
721
722
723
724
725
726
727
728
729
730
731
732
733
734
735
736
737
738
739
740
741
742
743
744
745
746
747
748
749
750
751
752
753
754
755
756
757
758
759
760
761
762
763
764
765
766
767
768
769
770
771
772
773
774
775
776
777
778
779
780
781
782
783
784
785
786
787
788
789
790
791
792
793
794
795
796
797
798
799
800
801
802
803
804
805
806
807
808
809
810
811
812
813
814
815
816
817
818
819
820
821
822
823
824
825
826
827
828
829
830
831
832
833
834
835
836
837
838
839
840
841
842
843
844
845
846
847
848
849
850
851
852
853
854
855
856
857
858
859
860
861
862
863
864
865
866
867
868
869
870
//! The `Window` struct and associated types.
use std::fmt;

use crate::{
    dpi::{PhysicalPosition, PhysicalSize, Position, Size},
    error::{ExternalError, NotSupportedError, OsError},
    event_loop::EventLoopWindowTarget,
    monitor::{MonitorHandle, VideoMode},
    platform_impl,
};

pub use crate::icon::{BadIcon, Icon};

/// Represents a window.
///
/// # Example
///
/// ```no_run
/// use winit::{
///     event::{Event, WindowEvent},
///     event_loop::{ControlFlow, EventLoop},
///     window::Window,
/// };
///
/// let mut event_loop = EventLoop::new();
/// let window = Window::new(&event_loop).unwrap();
///
/// event_loop.run(move |event, _, control_flow| {
///     *control_flow = ControlFlow::Wait;
///
///     match event {
///         Event::WindowEvent {
///             event: WindowEvent::CloseRequested,
///             ..
///         } => *control_flow = ControlFlow::Exit,
///         _ => (),
///     }
/// });
/// ```
pub struct Window {
    pub(crate) window: platform_impl::Window,
}

impl fmt::Debug for Window {
    fn fmt(&self, fmtr: &mut fmt::Formatter<'_>) -> fmt::Result {
        fmtr.pad("Window { .. }")
    }
}

impl Drop for Window {
    fn drop(&mut self) {
        // If the window is in exclusive fullscreen, we must restore the desktop
        // video mode (generally this would be done on application exit, but
        // closing the window doesn't necessarily always mean application exit,
        // such as when there are multiple windows)
        if let Some(Fullscreen::Exclusive(_)) = self.fullscreen() {
            self.set_fullscreen(None);
        }
    }
}

/// Identifier of a window. Unique for each window.
///
/// Can be obtained with `window.id()`.
///
/// Whenever you receive an event specific to a window, this event contains a `WindowId` which you
/// can then compare to the ids of your windows.
#[derive(Debug, Copy, Clone, PartialEq, Eq, PartialOrd, Ord, Hash)]
pub struct WindowId(pub(crate) platform_impl::WindowId);

impl WindowId {
    /// Returns a dummy `WindowId`, useful for unit testing. The only guarantee made about the return
    /// value of this function is that it will always be equal to itself and to future values returned
    /// by this function.  No other guarantees are made. This may be equal to a real `WindowId`.
    ///
    /// **Passing this into a winit function will result in undefined behavior.**
    pub unsafe fn dummy() -> Self {
        WindowId(platform_impl::WindowId::dummy())
    }
}

/// Object that allows you to build windows.
#[derive(Clone, Default)]
pub struct WindowBuilder {
    /// The attributes to use to create the window.
    pub window: WindowAttributes,

    // Platform-specific configuration.
    pub(crate) platform_specific: platform_impl::PlatformSpecificWindowBuilderAttributes,
}

impl fmt::Debug for WindowBuilder {
    fn fmt(&self, fmtr: &mut fmt::Formatter<'_>) -> fmt::Result {
        fmtr.debug_struct("WindowBuilder")
            .field("window", &self.window)
            .finish()
    }
}

/// Attributes to use when creating a window.
#[derive(Debug, Clone)]
pub struct WindowAttributes {
    /// The dimensions of the window. If this is `None`, some platform-specific dimensions will be
    /// used.
    ///
    /// The default is `None`.
    pub inner_size: Option<Size>,

    /// The minimum dimensions a window can be, If this is `None`, the window will have no minimum dimensions (aside from reserved).
    ///
    /// The default is `None`.
    pub min_inner_size: Option<Size>,

    /// The maximum dimensions a window can be, If this is `None`, the maximum will have no maximum or will be set to the primary monitor's dimensions by the platform.
    ///
    /// The default is `None`.
    pub max_inner_size: Option<Size>,

    /// Whether the window is resizable or not.
    ///
    /// The default is `true`.
    pub resizable: bool,

    /// Whether the window should be set as fullscreen upon creation.
    ///
    /// The default is `None`.
    pub fullscreen: Option<Fullscreen>,

    /// The title of the window in the title bar.
    ///
    /// The default is `"winit window"`.
    pub title: String,

    /// Whether the window should be maximized upon creation.
    ///
    /// The default is `false`.
    pub maximized: bool,

    /// Whether the window should be immediately visible upon creation.
    ///
    /// The default is `true`.
    pub visible: bool,

    /// Whether the the window should be transparent. If this is true, writing colors
    /// with alpha values different than `1.0` will produce a transparent window.
    ///
    /// The default is `false`.
    pub transparent: bool,

    /// Whether the window should have borders and bars.
    ///
    /// The default is `true`.
    pub decorations: bool,

    /// Whether the window should always be on top of other windows.
    ///
    /// The default is `false`.
    pub always_on_top: bool,

    /// The window icon.
    ///
    /// The default is `None`.
    pub window_icon: Option<Icon>,
}

impl Default for WindowAttributes {
    #[inline]
    fn default() -> WindowAttributes {
        WindowAttributes {
            inner_size: None,
            min_inner_size: None,
            max_inner_size: None,
            resizable: true,
            title: "winit window".to_owned(),
            maximized: false,
            fullscreen: None,
            visible: true,
            transparent: false,
            decorations: true,
            always_on_top: false,
            window_icon: None,
        }
    }
}

impl WindowBuilder {
    /// Initializes a new `WindowBuilder` with default values.
    #[inline]
    pub fn new() -> Self {
        Default::default()
    }

    /// Requests the window to be of specific dimensions.
    ///
    /// See [`Window::set_inner_size`] for details.
    ///
    /// [`Window::set_inner_size`]: crate::window::Window::set_inner_size
    #[inline]
    pub fn with_inner_size<S: Into<Size>>(mut self, size: S) -> Self {
        self.window.inner_size = Some(size.into());
        self
    }

    /// Sets a minimum dimension size for the window.
    ///
    /// See [`Window::set_min_inner_size`] for details.
    ///
    /// [`Window::set_min_inner_size`]: crate::window::Window::set_min_inner_size
    #[inline]
    pub fn with_min_inner_size<S: Into<Size>>(mut self, min_size: S) -> Self {
        self.window.min_inner_size = Some(min_size.into());
        self
    }

    /// Sets a maximum dimension size for the window.
    ///
    /// See [`Window::set_max_inner_size`] for details.
    ///
    /// [`Window::set_max_inner_size`]: crate::window::Window::set_max_inner_size
    #[inline]
    pub fn with_max_inner_size<S: Into<Size>>(mut self, max_size: S) -> Self {
        self.window.max_inner_size = Some(max_size.into());
        self
    }

    /// Sets whether the window is resizable or not.
    ///
    /// See [`Window::set_resizable`] for details.
    ///
    /// [`Window::set_resizable`]: crate::window::Window::set_resizable
    #[inline]
    pub fn with_resizable(mut self, resizable: bool) -> Self {
        self.window.resizable = resizable;
        self
    }

    /// Requests a specific title for the window.
    ///
    /// See [`Window::set_title`] for details.
    ///
    /// [`Window::set_title`]: crate::window::Window::set_title
    #[inline]
    pub fn with_title<T: Into<String>>(mut self, title: T) -> Self {
        self.window.title = title.into();
        self
    }

    /// Sets the window fullscreen state.
    ///
    /// See [`Window::set_fullscreen`] for details.
    ///
    /// [`Window::set_fullscreen`]: crate::window::Window::set_fullscreen
    #[inline]
    pub fn with_fullscreen(mut self, fullscreen: Option<Fullscreen>) -> Self {
        self.window.fullscreen = fullscreen;
        self
    }

    /// Requests maximized mode.
    ///
    /// See [`Window::set_maximized`] for details.
    ///
    /// [`Window::set_maximized`]: crate::window::Window::set_maximized
    #[inline]
    pub fn with_maximized(mut self, maximized: bool) -> Self {
        self.window.maximized = maximized;
        self
    }

    /// Sets whether the window will be initially hidden or visible.
    ///
    /// See [`Window::set_visible`] for details.
    ///
    /// [`Window::set_visible`]: crate::window::Window::set_visible
    #[inline]
    pub fn with_visible(mut self, visible: bool) -> Self {
        self.window.visible = visible;
        self
    }

    /// Sets whether the background of the window should be transparent.
    #[inline]
    pub fn with_transparent(mut self, transparent: bool) -> Self {
        self.window.transparent = transparent;
        self
    }

    /// Sets whether the window should have a border, a title bar, etc.
    ///
    /// See [`Window::set_decorations`] for details.
    ///
    /// [`Window::set_decorations`]: crate::window::Window::set_decorations
    #[inline]
    pub fn with_decorations(mut self, decorations: bool) -> Self {
        self.window.decorations = decorations;
        self
    }

    /// Sets whether or not the window will always be on top of other windows.
    ///
    /// See [`Window::set_always_on_top`] for details.
    ///
    /// [`Window::set_always_on_top`]: crate::window::Window::set_always_on_top
    #[inline]
    pub fn with_always_on_top(mut self, always_on_top: bool) -> Self {
        self.window.always_on_top = always_on_top;
        self
    }

    /// Sets the window icon.
    ///
    /// See [`Window::set_window_icon`] for details.
    ///
    /// [`Window::set_window_icon`]: crate::window::Window::set_window_icon
    #[inline]
    pub fn with_window_icon(mut self, window_icon: Option<Icon>) -> Self {
        self.window.window_icon = window_icon;
        self
    }

    /// Builds the window.
    ///
    /// Possible causes of error include denied permission, incompatible system, and lack of memory.
    ///
    /// Platform-specific behavior:
    /// - **Web**: The window is created but not inserted into the web page automatically. Please
    /// see the web platform module for more information.
    #[inline]
    pub fn build<T: 'static>(
        self,
        window_target: &EventLoopWindowTarget<T>,
    ) -> Result<Window, OsError> {
        platform_impl::Window::new(&window_target.p, self.window, self.platform_specific).map(
            |window| {
                window.request_redraw();
                Window { window }
            },
        )
    }
}

/// Base Window functions.
impl Window {
    /// Creates a new Window for platforms where this is appropriate.
    ///
    /// This function is equivalent to [`WindowBuilder::new().build(event_loop)`].
    ///
    /// Error should be very rare and only occur in case of permission denied, incompatible system,
    ///  out of memory, etc.
    ///
    /// Platform-specific behavior:
    /// - **Web**: The window is created but not inserted into the web page automatically. Please
    /// see the web platform module for more information.
    ///
    /// [`WindowBuilder::new().build(event_loop)`]: crate::window::WindowBuilder::build
    #[inline]
    pub fn new<T: 'static>(event_loop: &EventLoopWindowTarget<T>) -> Result<Window, OsError> {
        let builder = WindowBuilder::new();
        builder.build(event_loop)
    }

    /// Returns an identifier unique to the window.
    #[inline]
    pub fn id(&self) -> WindowId {
        WindowId(self.window.id())
    }

    /// Returns the scale factor that can be used to map logical pixels to physical pixels, and vice versa.
    ///
    /// See the [`dpi`](crate::dpi) module for more information.
    ///
    /// Note that this value can change depending on user action (for example if the window is
    /// moved to another screen); as such, tracking `WindowEvent::ScaleFactorChanged` events is
    /// the most robust way to track the DPI you need to use to draw.
    ///
    /// ## Platform-specific
    ///
    /// - **X11:** This respects Xft.dpi, and can be overridden using the `WINIT_X11_SCALE_FACTOR` environment variable.
    /// - **Android:** Always returns 1.0.
    /// - **iOS:** Can only be called on the main thread. Returns the underlying `UIView`'s
    ///   [`contentScaleFactor`].
    ///
    /// [`contentScaleFactor`]: https://developer.apple.com/documentation/uikit/uiview/1622657-contentscalefactor?language=objc
    #[inline]
    pub fn scale_factor(&self) -> f64 {
        self.window.scale_factor()
    }

    /// Emits a `WindowEvent::RedrawRequested` event in the associated event loop after all OS
    /// events have been processed by the event loop.
    ///
    /// This is the **strongly encouraged** method of redrawing windows, as it can integrate with
    /// OS-requested redraws (e.g. when a window gets resized).
    ///
    /// This function can cause `RedrawRequested` events to be emitted after `Event::MainEventsCleared`
    /// but before `Event::NewEvents` if called in the following circumstances:
    /// * While processing `MainEventsCleared`.
    /// * While processing a `RedrawRequested` event that was sent during `MainEventsCleared` or any
    ///   directly subsequent `RedrawRequested` event.
    ///
    /// ## Platform-specific
    ///
    /// - **iOS:** Can only be called on the main thread.
    /// - **Android:** Unsupported.
    #[inline]
    pub fn request_redraw(&self) {
        self.window.request_redraw()
    }
}

/// Position and size functions.
impl Window {
    /// Returns the position of the top-left hand corner of the window's client area relative to the
    /// top-left hand corner of the desktop.
    ///
    /// The same conditions that apply to `outer_position` apply to this method.
    ///
    /// ## Platform-specific
    ///
    /// - **iOS:** Can only be called on the main thread. Returns the top left coordinates of the
    ///   window's [safe area] in the screen space coordinate system.
    /// - **Web:** Returns the top-left coordinates relative to the viewport. _Note: this returns the
    ///    same value as `outer_position`._
    /// - **Android / Wayland:** Always returns [`NotSupportedError`].
    ///
    /// [safe area]: https://developer.apple.com/documentation/uikit/uiview/2891103-safeareainsets?language=objc
    #[inline]
    pub fn inner_position(&self) -> Result<PhysicalPosition<i32>, NotSupportedError> {
        self.window.inner_position()
    }

    /// Returns the position of the top-left hand corner of the window relative to the
    ///  top-left hand corner of the desktop.
    ///
    /// Note that the top-left hand corner of the desktop is not necessarily the same as
    ///  the screen. If the user uses a desktop with multiple monitors, the top-left hand corner
    ///  of the desktop is the top-left hand corner of the monitor at the top-left of the desktop.
    ///
    /// The coordinates can be negative if the top-left hand corner of the window is outside
    ///  of the visible screen region.
    ///
    /// ## Platform-specific
    ///
    /// - **iOS:** Can only be called on the main thread. Returns the top left coordinates of the
    ///   window in the screen space coordinate system.
    /// - **Web:** Returns the top-left coordinates relative to the viewport.
    /// - **Android / Wayland:** Always returns [`NotSupportedError`].
    #[inline]
    pub fn outer_position(&self) -> Result<PhysicalPosition<i32>, NotSupportedError> {
        self.window.outer_position()
    }

    /// Modifies the position of the window.
    ///
    /// See `outer_position` for more information about the coordinates. This automatically un-maximizes the
    /// window if it's maximized.
    ///
    /// ## Platform-specific
    ///
    /// - **iOS:** Can only be called on the main thread. Sets the top left coordinates of the
    ///   window in the screen space coordinate system.
    /// - **Web:** Sets the top-left coordinates relative to the viewport.
    /// - **Android / Wayland:** Unsupported.
    #[inline]
    pub fn set_outer_position<P: Into<Position>>(&self, position: P) {
        self.window.set_outer_position(position.into())
    }

    /// Returns the physical size of the window's client area.
    ///
    /// The client area is the content of the window, excluding the title bar and borders.
    ///
    /// ## Platform-specific
    ///
    /// - **iOS:** Can only be called on the main thread. Returns the `PhysicalSize` of the window's
    ///   [safe area] in screen space coordinates.
    /// - **Web:** Returns the size of the canvas element.
    ///
    /// [safe area]: https://developer.apple.com/documentation/uikit/uiview/2891103-safeareainsets?language=objc
    #[inline]
    pub fn inner_size(&self) -> PhysicalSize<u32> {
        self.window.inner_size()
    }

    /// Modifies the inner size of the window.
    ///
    /// See `inner_size` for more information about the values. This automatically un-maximizes the
    /// window if it's maximized.
    ///
    /// ## Platform-specific
    ///
    /// - **iOS / Android:** Unsupported.
    /// - **Web:** Sets the size of the canvas element.
    #[inline]
    pub fn set_inner_size<S: Into<Size>>(&self, size: S) {
        self.window.set_inner_size(size.into())
    }

    /// Returns the physical size of the entire window.
    ///
    /// These dimensions include the title bar and borders. If you don't want that (and you usually don't),
    /// use `inner_size` instead.
    ///
    /// ## Platform-specific
    ///
    /// - **iOS:** Can only be called on the main thread. Returns the `PhysicalSize` of the window in
    ///   screen space coordinates.
    /// - **Web:** Returns the size of the canvas element. _Note: this returns the same value as
    ///   `inner_size`._
    #[inline]
    pub fn outer_size(&self) -> PhysicalSize<u32> {
        self.window.outer_size()
    }

    /// Sets a minimum dimension size for the window.
    ///
    /// ## Platform-specific
    ///
    /// - **iOS / Android / Web:** Unsupported.
    #[inline]
    pub fn set_min_inner_size<S: Into<Size>>(&self, min_size: Option<S>) {
        self.window.set_min_inner_size(min_size.map(|s| s.into()))
    }

    /// Sets a maximum dimension size for the window.
    ///
    /// ## Platform-specific
    ///
    /// - **iOS / Andraid / Web:** Unsupported.
    #[inline]
    pub fn set_max_inner_size<S: Into<Size>>(&self, max_size: Option<S>) {
        self.window.set_max_inner_size(max_size.map(|s| s.into()))
    }
}

/// Misc. attribute functions.
impl Window {
    /// Modifies the title of the window.
    ///
    /// ## Platform-specific
    ///
    /// - **iOS / Android:** Unsupported.
    #[inline]
    pub fn set_title(&self, title: &str) {
        self.window.set_title(title)
    }

    /// Modifies the window's visibility.
    ///
    /// If `false`, this will hide the window. If `true`, this will show the window.
    /// ## Platform-specific
    ///
    /// - **Android / Wayland / Web:** Unsupported.
    /// - **iOS:** Can only be called on the main thread.
    #[inline]
    pub fn set_visible(&self, visible: bool) {
        self.window.set_visible(visible)
    }

    /// Sets whether the window is resizable or not.
    ///
    /// Note that making the window unresizable doesn't exempt you from handling `Resized`, as that event can still be
    /// triggered by DPI scaling, entering fullscreen mode, etc.
    ///
    /// ## Platform-specific
    ///
    /// This only has an effect on desktop platforms.
    ///
    /// Due to a bug in XFCE, this has no effect on Xfwm.
    ///
    /// ## Platform-specific
    ///
    /// - **iOS / Android / Web:** Unsupported.
    #[inline]
    pub fn set_resizable(&self, resizable: bool) {
        self.window.set_resizable(resizable)
    }

    /// Sets the window to minimized or back
    ///
    /// ## Platform-specific
    ///
    /// - **iOS / Android / Web:** Unsupported.
    /// - **Wayland:** Un-minimize is unsupported.
    #[inline]
    pub fn set_minimized(&self, minimized: bool) {
        self.window.set_minimized(minimized);
    }

    /// Sets the window to maximized or back.
    ///
    /// ## Platform-specific
    ///
    /// - **iOS / Android / Web:** Unsupported.
    #[inline]
    pub fn set_maximized(&self, maximized: bool) {
        self.window.set_maximized(maximized)
    }

    /// Sets the window to fullscreen or back.
    ///
    /// ## Platform-specific
    ///
    /// - **macOS:** `Fullscreen::Exclusive` provides true exclusive mode with a
    ///   video mode change. *Caveat!* macOS doesn't provide task switching (or
    ///   spaces!) while in exclusive fullscreen mode. This mode should be used
    ///   when a video mode change is desired, but for a better user experience,
    ///   borderless fullscreen might be preferred.
    ///
    ///   `Fullscreen::Borderless` provides a borderless fullscreen window on a
    ///   separate space. This is the idiomatic way for fullscreen games to work
    ///   on macOS. See `WindowExtMacOs::set_simple_fullscreen` if
    ///   separate spaces are not preferred.
    ///
    ///   The dock and the menu bar are always disabled in fullscreen mode.
    /// - **iOS:** Can only be called on the main thread.
    /// - **Wayland:** Does not support exclusive fullscreen mode and will no-op a request.
    /// - **Windows:** Screen saver is disabled in fullscreen mode.
    /// - **Android:** Unsupported.
    #[inline]
    pub fn set_fullscreen(&self, fullscreen: Option<Fullscreen>) {
        self.window.set_fullscreen(fullscreen)
    }

    /// Gets the window's current fullscreen state.
    ///
    /// ## Platform-specific
    ///
    /// - **iOS:** Can only be called on the main thread.
    /// - **Android:** Will always return `None`.
    /// - **Wayland:** Can return `Borderless(None)` when there are no monitors.
    #[inline]
    pub fn fullscreen(&self) -> Option<Fullscreen> {
        self.window.fullscreen()
    }

    /// Turn window decorations on or off.
    ///
    /// ## Platform-specific
    ///
    /// - **iOS / Android / Web:** Unsupported.
    ///
    /// [`setPrefersStatusBarHidden`]: https://developer.apple.com/documentation/uikit/uiviewcontroller/1621440-prefersstatusbarhidden?language=objc
    #[inline]
    pub fn set_decorations(&self, decorations: bool) {
        self.window.set_decorations(decorations)
    }

    /// Change whether or not the window will always be on top of other windows.
    ///
    /// ## Platform-specific
    ///
    /// - **iOS / Android / Web / Wayland:** Unsupported.
    #[inline]
    pub fn set_always_on_top(&self, always_on_top: bool) {
        self.window.set_always_on_top(always_on_top)
    }

    /// Sets the window icon. On Windows and X11, this is typically the small icon in the top-left
    /// corner of the titlebar.
    ///
    /// ## Platform-specific
    ///
    /// - **iOS / Android / Web / Wayland / macOS:** Unsupported.
    ///
    /// On Windows, this sets `ICON_SMALL`. The base size for a window icon is 16x16, but it's
    /// recommended to account for screen scaling and pick a multiple of that, i.e. 32x32.
    ///
    /// X11 has no universal guidelines for icon sizes, so you're at the whims of the WM. That
    /// said, it's usually in the same ballpark as on Windows.
    #[inline]
    pub fn set_window_icon(&self, window_icon: Option<Icon>) {
        self.window.set_window_icon(window_icon)
    }

    /// Sets location of IME candidate box in client area coordinates relative to the top left.
    ///
    /// ## Platform-specific
    ///
    /// - **iOS / Android / Web / Windows:** Unsupported.
    #[inline]
    pub fn set_ime_position<P: Into<Position>>(&self, position: P) {
        self.window.set_ime_position(position.into())
    }
}

/// Cursor functions.
impl Window {
    /// Modifies the cursor icon of the window.
    ///
    /// ## Platform-specific
    ///
    /// - **iOS / Android:** Unsupported.
    #[inline]
    pub fn set_cursor_icon(&self, cursor: CursorIcon) {
        self.window.set_cursor_icon(cursor);
    }

    /// Changes the position of the cursor in window coordinates.
    ///
    /// ## Platform-specific
    ///
    /// - **iOS / Android / Web / Wayland:** Always returns an [`ExternalError::NotSupported`].
    #[inline]
    pub fn set_cursor_position<P: Into<Position>>(&self, position: P) -> Result<(), ExternalError> {
        self.window.set_cursor_position(position.into())
    }

    /// Grabs the cursor, preventing it from leaving the window.
    ///
    /// There's no guarantee that the cursor will be hidden. You should
    /// hide it by yourself if you want so.
    ///
    /// ## Platform-specific
    ///
    /// - **macOS:** This locks the cursor in a fixed location, which looks visually awkward.
    /// - **iOS / Android / Web:** Always returns an [`ExternalError::NotSupported`].
    #[inline]
    pub fn set_cursor_grab(&self, grab: bool) -> Result<(), ExternalError> {
        self.window.set_cursor_grab(grab)
    }

    /// Modifies the cursor's visibility.
    ///
    /// If `false`, this will hide the cursor. If `true`, this will show the cursor.
    ///
    /// ## Platform-specific
    ///
    /// - **Windows:** The cursor is only hidden within the confines of the window.
    /// - **X11:** The cursor is only hidden within the confines of the window.
    /// - **Wayland:** The cursor is only hidden within the confines of the window.
    /// - **macOS:** The cursor is hidden as long as the window has input focus, even if the cursor is
    ///   outside of the window.
    /// - **iOS / Android:** Unsupported.
    #[inline]
    pub fn set_cursor_visible(&self, visible: bool) {
        self.window.set_cursor_visible(visible)
    }
}

/// Monitor info functions.
impl Window {
    /// Returns the monitor on which the window currently resides.
    ///
    /// Returns `None` if current monitor can't be detected.
    ///
    /// ## Platform-specific
    ///
    /// **iOS:** Can only be called on the main thread.
    #[inline]
    pub fn current_monitor(&self) -> Option<MonitorHandle> {
        self.window.current_monitor()
    }

    /// Returns the list of all the monitors available on the system.
    ///
    /// This is the same as `EventLoopWindowTarget::available_monitors`, and is provided for convenience.
    ///
    /// ## Platform-specific
    ///
    /// **iOS:** Can only be called on the main thread.
    #[inline]
    pub fn available_monitors(&self) -> impl Iterator<Item = MonitorHandle> {
        self.window
            .available_monitors()
            .into_iter()
            .map(|inner| MonitorHandle { inner })
    }

    /// Returns the primary monitor of the system.
    ///
    /// Returns `None` if it can't identify any monitor as a primary one.
    ///
    /// This is the same as `EventLoopWindowTarget::primary_monitor`, and is provided for convenience.
    ///
    /// ## Platform-specific
    ///
    /// **iOS:** Can only be called on the main thread.
    /// **Wayland:** Always returns `None`.
    #[inline]
    pub fn primary_monitor(&self) -> Option<MonitorHandle> {
        self.window.primary_monitor()
    }
}

unsafe impl raw_window_handle::HasRawWindowHandle for Window {
    fn raw_window_handle(&self) -> raw_window_handle::RawWindowHandle {
        self.window.raw_window_handle()
    }
}

/// Describes the appearance of the mouse cursor.
#[derive(Debug, Copy, Clone, PartialEq, Eq, Hash)]
#[cfg_attr(feature = "serde", derive(Serialize, Deserialize))]
pub enum CursorIcon {
    /// The platform-dependent default cursor.
    Default,
    /// A simple crosshair.
    Crosshair,
    /// A hand (often used to indicate links in web browsers).
    Hand,
    /// Self explanatory.
    Arrow,
    /// Indicates something is to be moved.
    Move,
    /// Indicates text that may be selected or edited.
    Text,
    /// Program busy indicator.
    Wait,
    /// Help indicator (often rendered as a "?")
    Help,
    /// Progress indicator. Shows that processing is being done. But in contrast
    /// with "Wait" the user may still interact with the program. Often rendered
    /// as a spinning beach ball, or an arrow with a watch or hourglass.
    Progress,

    /// Cursor showing that something cannot be done.
    NotAllowed,
    ContextMenu,
    Cell,
    VerticalText,
    Alias,
    Copy,
    NoDrop,
    /// Indicates something can be grabbed.
    Grab,
    /// Indicates something is grabbed.
    Grabbing,
    AllScroll,
    ZoomIn,
    ZoomOut,

    /// Indicate that some edge is to be moved. For example, the 'SeResize' cursor
    /// is used when the movement starts from the south-east corner of the box.
    EResize,
    NResize,
    NeResize,
    NwResize,
    SResize,
    SeResize,
    SwResize,
    WResize,
    EwResize,
    NsResize,
    NeswResize,
    NwseResize,
    ColResize,
    RowResize,
}

impl Default for CursorIcon {
    fn default() -> Self {
        CursorIcon::Default
    }
}

/// Fullscreen modes.
#[derive(Clone, Debug, PartialEq)]
pub enum Fullscreen {
    Exclusive(VideoMode),

    /// Providing `None` to `Borderless` will fullscreen on the current monitor.
    Borderless(Option<MonitorHandle>),
}

#[derive(Clone, Debug, PartialEq)]
pub enum Theme {
    Light,
    Dark,
}