aboutsummaryrefslogtreecommitdiffstats
path: root/src/api/x11/window.rs
blob: 4e6e17edea054dbc2e8f91adf981737f5c150f46 (plain)
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
use {Event, BuilderAttribs, MouseCursor};
use CreationError;
use CreationError::OsError;
use libc;
use std::borrow::Borrow;
use std::{mem, ptr};
use std::cell::Cell;
use std::sync::atomic::AtomicBool;
use std::collections::VecDeque;
use std::sync::{Arc, Mutex};

use Api;
use ContextError;
use CursorState;
use GlContext;
use GlRequest;
use PixelFormat;

use api::glx::Context as GlxContext;
use api::egl::Context as EglContext;

use platform::MonitorID as PlatformMonitorID;

use super::input::XInputEventHandler;
use super::{ffi};
use super::{MonitorID, XConnection};

// XOpenIM doesn't seem to be thread-safe
lazy_static! {      // TODO: use a static mutex when that's possible, and put me back in my function
    static ref GLOBAL_XOPENIM_LOCK: Mutex<()> = Mutex::new(());
}

// TODO: remove me
fn with_c_str<F, T>(s: &str, f: F) -> T where F: FnOnce(*const libc::c_char) -> T {
    use std::ffi::CString;
    let c_str = CString::new(s.as_bytes().to_vec()).unwrap();
    f(c_str.as_ptr())
}

pub struct XWindow {
    display: Arc<XConnection>,
    window: ffi::Window,
    pub context: Context,
    is_fullscreen: bool,
    screen_id: libc::c_int,
    xf86_desk_mode: *mut ffi::XF86VidModeModeInfo,
    ic: ffi::XIC,
    im: ffi::XIM,
    colormap: ffi::Colormap,
}

pub enum Context {
    Glx(GlxContext),
    Egl(EglContext),
    None,
}

unsafe impl Send for XWindow {}
unsafe impl Sync for XWindow {}

unsafe impl Send for Window {}
unsafe impl Sync for Window {}

impl Drop for XWindow {
    fn drop(&mut self) {
        unsafe {
            // we don't call MakeCurrent(0, 0) because we are not sure that the context
            // is still the current one
            self.context = Context::None;

            let _lock = GLOBAL_XOPENIM_LOCK.lock().unwrap();

            if self.is_fullscreen {
                (self.display.xf86vmode.XF86VidModeSwitchToMode)(self.display.display, self.screen_id, self.xf86_desk_mode);
                (self.display.xf86vmode.XF86VidModeSetViewPort)(self.display.display, self.screen_id, 0, 0);
            }

            (self.display.xlib.XDestroyIC)(self.ic);
            (self.display.xlib.XCloseIM)(self.im);
            (self.display.xlib.XDestroyWindow)(self.display.display, self.window);
            (self.display.xlib.XFreeColormap)(self.display.display, self.colormap);
        }
    }
}

#[derive(Clone)]
pub struct WindowProxy {
    x: Arc<XWindow>,
}

impl WindowProxy {
    pub fn wakeup_event_loop(&self) {
        let mut xev = ffi::XClientMessageEvent {
            type_: ffi::ClientMessage,
            window: self.x.window,
            format: 32,
            message_type: 0,
            serial: 0,
            send_event: 0,
            display: self.x.display.display,
            data: unsafe { mem::zeroed() },
        };

        unsafe {
            (self.x.display.xlib.XSendEvent)(self.x.display.display, self.x.window, 0, 0, mem::transmute(&mut xev));
            (self.x.display.xlib.XFlush)(self.x.display.display);
        }
    }
}

// XEvents of type GenericEvent store their actual data
// in an XGenericEventCookie data structure. This is a wrapper
// to extract the cookie from a GenericEvent XEvent and release
// the cookie data once it has been processed
struct GenericEventCookie<'a> {
    display: &'a XConnection,
    cookie: ffi::XGenericEventCookie
}

impl<'a> GenericEventCookie<'a> {
    fn from_event<'b>(display: &'b XConnection, event: ffi::XEvent) -> Option<GenericEventCookie<'b>> {
        unsafe {
            let mut cookie: ffi::XGenericEventCookie = From::from(event);
            if (display.xlib.XGetEventData)(display.display, &mut cookie) == ffi::True {
                Some(GenericEventCookie{display: display, cookie: cookie})
            } else {
                None
            }
        }
    }
}

impl<'a> Drop for GenericEventCookie<'a> {
    fn drop(&mut self) {
        unsafe {
            let xlib = &self.display.xlib;
            (xlib.XFreeEventData)(self.display.display, &mut self.cookie);
        }
    }
}

pub struct PollEventsIterator<'a> {
    window: &'a Window
}

impl<'a> Iterator for PollEventsIterator<'a> {
    type Item = Event;

    fn next(&mut self) -> Option<Event> {
        let xlib = &self.window.x.display.xlib;

        loop {
            if let Some(ev) = self.window.pending_events.lock().unwrap().pop_front() {
                return Some(ev);
            }

            let mut xev = unsafe { mem::uninitialized() };
            let res = unsafe { (xlib.XCheckMaskEvent)(self.window.x.display.display, -1, &mut xev) };

            if res == 0 {
                let res = unsafe { (xlib.XCheckTypedEvent)(self.window.x.display.display, ffi::ClientMessage, &mut xev) };

                if res == 0 {
                    let res = unsafe { (xlib.XCheckTypedEvent)(self.window.x.display.display, ffi::GenericEvent, &mut xev) };
                    if res == 0 {
                        return None;
                    }
                }
            }

            match xev.get_type() {
                ffi::KeymapNotify => {
                    unsafe { (xlib.XRefreshKeyboardMapping)(mem::transmute(&xev)); }
                },

                ffi::ClientMessage => {
                    use events::Event::{Closed, Awakened};
                    use std::sync::atomic::Ordering::Relaxed;

                    let client_msg: &ffi::XClientMessageEvent = unsafe { mem::transmute(&xev) };

                    if client_msg.data.get_long(0) == self.window.wm_delete_window as libc::c_long {
                        self.window.is_closed.store(true, Relaxed);
                        return Some(Closed);
                    } else {
                        return Some(Awakened);
                    }
                },

                ffi::ConfigureNotify => {
                    use events::Event::Resized;
                    let cfg_event: &ffi::XConfigureEvent = unsafe { mem::transmute(&xev) };
                    let (current_width, current_height) = self.window.current_size.get();
                    if current_width != cfg_event.width || current_height != cfg_event.height {
                        self.window.current_size.set((cfg_event.width, cfg_event.height));
                        return Some(Resized(cfg_event.width as u32, cfg_event.height as u32));
                    }
                },

                ffi::Expose => {
                    use events::Event::Refresh;
                    return Some(Refresh);
                },

                ffi::KeyPress | ffi::KeyRelease => {
                    let mut event: &mut ffi::XKeyEvent = unsafe { mem::transmute(&mut xev) };
                    let events = self.window.input_handler.lock().unwrap().translate_key_event(&mut event);
                    for event in events {
                        self.window.pending_events.lock().unwrap().push_back(event);
                    }
                },

                ffi::GenericEvent => {
                    if let Some(cookie) = GenericEventCookie::from_event(self.window.x.display.borrow(), xev) {
                        match cookie.cookie.evtype {
                            ffi::XI_DeviceChanged...ffi::XI_LASTEVENT => {
                                match self.window.input_handler.lock() {
                                    Ok(mut handler) => {
                                        match handler.translate_event(&cookie.cookie) {
                                            Some(event) => self.window.pending_events.lock().unwrap().push_back(event),
                                            None => {}
                                        }
                                    },
                                    Err(_) => {}
                                }
                            },
                            _ => {}
                        }
                    }
                }

                _ => {}
            };
        }
    }
}

pub struct WaitEventsIterator<'a> {
    window: &'a Window,
}

impl<'a> Iterator for WaitEventsIterator<'a> {
    type Item = Event;

    fn next(&mut self) -> Option<Event> {
        use std::sync::atomic::Ordering::Relaxed;
        use std::mem;

        while !self.window.is_closed.load(Relaxed) {
            if let Some(ev) = self.window.pending_events.lock().unwrap().pop_front() {
                return Some(ev);
            }

            // this will block until an event arrives, but doesn't remove
            // it from the queue
            let mut xev = unsafe { mem::uninitialized() };
            unsafe { (self.window.x.display.xlib.XPeekEvent)(self.window.x.display.display, &mut xev) };

            // calling poll_events()
            if let Some(ev) = self.window.poll_events().next() {
                return Some(ev);
            }
        }

        None
    }
}

pub struct Window {
    pub x: Arc<XWindow>,
    is_closed: AtomicBool,
    wm_delete_window: ffi::Atom,
    current_size: Cell<(libc::c_int, libc::c_int)>,
    /// Events that have been retreived with XLib but not dispatched with iterators yet
    pending_events: Mutex<VecDeque<Event>>,
    cursor_state: Mutex<CursorState>,
    input_handler: Mutex<XInputEventHandler>
}

impl Window {
    pub fn new(display: &Arc<XConnection>, builder: BuilderAttribs) -> Result<Window, CreationError> {
        let dimensions = builder.dimensions.unwrap_or((800, 600));

        let screen_id = match builder.monitor {
            Some(PlatformMonitorID::X(MonitorID(_, monitor))) => monitor as i32,
            _ => unsafe { (display.xlib.XDefaultScreen)(display.display) },
        };

        // finding the mode to switch to if necessary
        let (mode_to_switch_to, xf86_desk_mode) = unsafe {
            let mut mode_num: libc::c_int = mem::uninitialized();
            let mut modes: *mut *mut ffi::XF86VidModeModeInfo = mem::uninitialized();
            if (display.xf86vmode.XF86VidModeGetAllModeLines)(display.display, screen_id, &mut mode_num, &mut modes) == 0 {
                return Err(OsError(format!("Could not query the video modes")));
            }

            let xf86_desk_mode = *modes.offset(0);

            // FIXME: `XF86VidModeModeInfo` is missing its `hskew` field. Therefore we point to
            //        `vsyncstart` instead of `vdisplay` as a temporary hack.

            let mode_to_switch_to = if builder.monitor.is_some() {
                let matching_mode = (0 .. mode_num).map(|i| {
                    let m: ffi::XF86VidModeModeInfo = ptr::read(*modes.offset(i as isize) as *const _); m
                }).find(|m| m.hdisplay == dimensions.0 as u16 && m.vsyncstart == dimensions.1 as u16);

                if let Some(matching_mode) = matching_mode {
                    Some(matching_mode)

                } else {
                    let m = (0 .. mode_num).map(|i| {
                        let m: ffi::XF86VidModeModeInfo = ptr::read(*modes.offset(i as isize) as *const _); m
                    }).find(|m| m.hdisplay >= dimensions.0 as u16 && m.vsyncstart == dimensions.1 as u16);

                    match m {
                        Some(m) => Some(m),
                        None => return Err(OsError(format!("Could not find a suitable graphics mode")))
                    }
                }
            } else {
                None
            };

            (display.xlib.XFree)(modes as *mut _);

            (mode_to_switch_to, xf86_desk_mode)
        };

        // start the context building process
        enum Prototype<'a> {
            Glx(::api::glx::ContextPrototype<'a>),
            Egl(::api::egl::ContextPrototype<'a>),
        }
        let builder_clone = builder.clone();
        let context = match builder.gl_version {
            GlRequest::Latest | GlRequest::Specific(Api::OpenGl, _) | GlRequest::GlThenGles { .. } => {
                if let Some(ref glx) = display.glx {
                    Prototype::Glx(try!(GlxContext::new(glx.clone(), &display.xlib, &builder_clone, display.display)))
                } else if let Some(ref egl) = display.egl {
                    Prototype::Egl(try!(EglContext::new(egl.clone(), &builder_clone, Some(display.display as *const _))))
                } else {
                    return Err(CreationError::NotSupported);
                }
            },
            GlRequest::Specific(Api::OpenGlEs, _) => {
                if let Some(ref egl) = display.egl {
                    Prototype::Egl(try!(EglContext::new(egl.clone(), &builder_clone, Some(display.display as *const _))))
                } else {
                    return Err(CreationError::NotSupported);
                }
            },
            GlRequest::Specific(_, _) => {
                return Err(CreationError::NotSupported);
            },
        };

        // getting the `visual_infos` (a struct that contains information about the visual to use)
        let visual_infos = match context {
            Prototype::Glx(ref p) => p.get_visual_infos().clone(),
            Prototype::Egl(ref p) => {
                unsafe {
                    let mut template: ffi::XVisualInfo = mem::zeroed();
                    template.visualid = p.get_native_visual_id() as ffi::VisualID;

                    let mut num_visuals = 0;
                    let vi = (display.xlib.XGetVisualInfo)(display.display, ffi::VisualIDMask,
                                                           &mut template, &mut num_visuals);
                    assert!(!vi.is_null());
                    assert!(num_visuals == 1);

                    let vi_copy = ptr::read(vi as *const _);
                    (display.xlib.XFree)(vi as *mut _);
                    vi_copy
                }
            },
        };

        // getting the root window
        let root = unsafe { (display.xlib.XDefaultRootWindow)(display.display) };

        // creating the color map
        let cmap = unsafe {
            let cmap = (display.xlib.XCreateColormap)(display.display, root,
                                                      visual_infos.visual as *mut _,
                                                      ffi::AllocNone);
            // TODO: error checking?
            cmap
        };

        // creating
        let mut set_win_attr = {
            let mut swa: ffi::XSetWindowAttributes = unsafe { mem::zeroed() };
            swa.colormap = cmap;
            swa.event_mask = ffi::ExposureMask | ffi::StructureNotifyMask |
                ffi::VisibilityChangeMask | ffi::KeyPressMask | ffi::PointerMotionMask |
                ffi::KeyReleaseMask | ffi::ButtonPressMask |
                ffi::ButtonReleaseMask | ffi::KeymapStateMask;
            swa.border_pixel = 0;
            if builder.transparent {
                swa.background_pixel = 0;
            }
            swa.override_redirect = 0;
            swa
        };

        let mut window_attributes = ffi::CWBorderPixel | ffi::CWColormap | ffi::CWEventMask;

        if builder.transparent {
            window_attributes |= ffi::CWBackPixel;
        }

        // switching to fullscreen
        if let Some(mut mode_to_switch_to) = mode_to_switch_to {
            window_attributes |= ffi::CWOverrideRedirect;
            unsafe {
                (display.xf86vmode.XF86VidModeSwitchToMode)(display.display, screen_id, &mut mode_to_switch_to);
                (display.xf86vmode.XF86VidModeSetViewPort)(display.display, screen_id, 0, 0);
                set_win_attr.override_redirect = 1;
            }
        }

        // finally creating the window
        let window = unsafe {
            let win = (display.xlib.XCreateWindow)(display.display, root, 0, 0, dimensions.0 as libc::c_uint,
                dimensions.1 as libc::c_uint, 0, visual_infos.depth, ffi::InputOutput as libc::c_uint,
                visual_infos.visual as *mut _, window_attributes,
                &mut set_win_attr);
            win
        };

        // set visibility
        if builder.visible {
            unsafe {
                (display.xlib.XMapRaised)(display.display, window);
                (display.xlib.XFlush)(display.display);
            }
        }

        // creating window, step 2
        let wm_delete_window = unsafe {
            let mut wm_delete_window = with_c_str("WM_DELETE_WINDOW", |delete_window|
                (display.xlib.XInternAtom)(display.display, delete_window, 0)
            );
            (display.xlib.XSetWMProtocols)(display.display, window, &mut wm_delete_window, 1);
            with_c_str(&*builder.title, |title| {;
                (display.xlib.XStoreName)(display.display, window, title);
            });
            (display.xlib.XFlush)(display.display);

            wm_delete_window
        };

        // creating IM
        let im = unsafe {
            let _lock = GLOBAL_XOPENIM_LOCK.lock().unwrap();

            let im = (display.xlib.XOpenIM)(display.display, ptr::null_mut(), ptr::null_mut(), ptr::null_mut());
            if im.is_null() {
                return Err(OsError(format!("XOpenIM failed")));
            }
            im
        };

        // creating input context
        let ic = unsafe {
            let ic = with_c_str("inputStyle", |input_style|
                with_c_str("clientWindow", |client_window|
                    (display.xlib.XCreateIC)(
                        im, input_style,
                        ffi::XIMPreeditNothing | ffi::XIMStatusNothing, client_window,
                        window, ptr::null::<()>()
                    )
                )
            );
            if ic.is_null() {
                return Err(OsError(format!("XCreateIC failed")));
            }
            (display.xlib.XSetICFocus)(ic);
            ic
        };

        // Attempt to make keyboard input repeat detectable
        unsafe {
            let mut supported_ptr = ffi::False;
            (display.xlib.XkbSetDetectableAutoRepeat)(display.display, ffi::True, &mut supported_ptr);
            if supported_ptr == ffi::False {
                return Err(OsError(format!("XkbSetDetectableAutoRepeat failed")));
            }
        }

        // Set ICCCM WM_CLASS property based on initial window title
        unsafe {
            with_c_str(&*builder.title, |c_name| {
                let hint = (display.xlib.XAllocClassHint)();
                (*hint).res_name = c_name as *mut libc::c_char;
                (*hint).res_class = c_name as *mut libc::c_char;
                (display.xlib.XSetClassHint)(display.display, window, hint);
                (display.xlib.XFree)(hint as *mut libc::c_void);
            });
        }

        let is_fullscreen = builder.monitor.is_some();

        // finish creating the OpenGL context
        let context = match context {
            Prototype::Glx(ctxt) => {
                Context::Glx(try!(ctxt.finish(window)))
            },
            Prototype::Egl(ctxt) => {
                Context::Egl(try!(ctxt.finish(window as *const libc::c_void)))
            },
        };

        // creating the window object
        let window = Window {
            x: Arc::new(XWindow {
                display: display.clone(),
                window: window,
                im: im,
                ic: ic,
                context: context,
                screen_id: screen_id,
                is_fullscreen: is_fullscreen,
                xf86_desk_mode: xf86_desk_mode,
                colormap: cmap,
            }),
            is_closed: AtomicBool::new(false),
            wm_delete_window: wm_delete_window,
            current_size: Cell::new((0, 0)),
            pending_events: Mutex::new(VecDeque::new()),
            cursor_state: Mutex::new(CursorState::Normal),
            input_handler: Mutex::new(XInputEventHandler::new(display, window, ic))
        };

        // returning
        Ok(window)
    }

    pub fn set_title(&self, title: &str) {
        with_c_str(title, |title| unsafe {
            (self.x.display.xlib.XStoreName)(self.x.display.display, self.x.window, title);
            (self.x.display.xlib.XFlush)(self.x.display.display);
        })
    }

    pub fn show(&self) {
        unsafe {
            (self.x.display.xlib.XMapRaised)(self.x.display.display, self.x.window);
            (self.x.display.xlib.XFlush)(self.x.display.display);
        }
    }

    pub fn hide(&self) {
        unsafe {
            (self.x.display.xlib.XUnmapWindow)(self.x.display.display, self.x.window);
            (self.x.display.xlib.XFlush)(self.x.display.display);
        }
    }

    fn get_geometry(&self) -> Option<(i32, i32, u32, u32, u32)> {
        unsafe {
            use std::mem;

            let mut root: ffi::Window = mem::uninitialized();
            let mut x: libc::c_int = mem::uninitialized();
            let mut y: libc::c_int = mem::uninitialized();
            let mut width: libc::c_uint = mem::uninitialized();
            let mut height: libc::c_uint = mem::uninitialized();
            let mut border: libc::c_uint = mem::uninitialized();
            let mut depth: libc::c_uint = mem::uninitialized();

            if (self.x.display.xlib.XGetGeometry)(self.x.display.display, self.x.window,
                &mut root, &mut x, &mut y, &mut width, &mut height,
                &mut border, &mut depth) == 0
            {
                return None;
            }

            Some((x as i32, y as i32, width as u32, height as u32, border as u32))
        }
    }

    pub fn get_position(&self) -> Option<(i32, i32)> {
        self.get_geometry().map(|(x, y, _, _, _)| (x, y))
    }

    pub fn set_position(&self, x: i32, y: i32) {
        unsafe { (self.x.display.xlib.XMoveWindow)(self.x.display.display, self.x.window, x as libc::c_int, y as libc::c_int); }
    }

    pub fn get_inner_size(&self) -> Option<(u32, u32)> {
        self.get_geometry().map(|(_, _, w, h, _)| (w, h))
    }

    pub fn get_outer_size(&self) -> Option<(u32, u32)> {
        self.get_geometry().map(|(_, _, w, h, b)| (w + b, h + b))       // TODO: is this really outside?
    }

    pub fn set_inner_size(&self, x: u32, y: u32) {
        unsafe { (self.x.display.xlib.XResizeWindow)(self.x.display.display, self.x.window, x as libc::c_uint, y as libc::c_uint); }
    }

    pub fn create_window_proxy(&self) -> WindowProxy {
        WindowProxy {
            x: self.x.clone()
        }
    }

    pub fn poll_events(&self) -> PollEventsIterator {
        PollEventsIterator {
            window: self
        }
    }

    pub fn wait_events(&self) -> WaitEventsIterator {
        WaitEventsIterator {
            window: self
        }
    }

    pub fn platform_display(&self) -> *mut libc::c_void {
        self.x.display.display as *mut libc::c_void
    }

    pub fn platform_window(&self) -> *mut libc::c_void {
        self.x.window as *mut libc::c_void
    }


    pub fn set_window_resize_callback(&mut self, _: Option<fn(u32, u32)>) {
    }

    pub fn set_cursor(&self, cursor: MouseCursor) {
        unsafe {
            use std::ffi::CString;
            let cursor_name = match cursor {
                MouseCursor::Alias => "link",
                MouseCursor::Arrow => "arrow",
                MouseCursor::Cell => "plus",
                MouseCursor::Copy => "copy",
                MouseCursor::Crosshair => "crosshair",
                MouseCursor::Default => "left_ptr",
                MouseCursor::Grabbing => "grabbing",
                MouseCursor::Hand | MouseCursor::Grab => "hand",
                MouseCursor::Help => "question_arrow",
                MouseCursor::Move => "move",
                MouseCursor::NoDrop => "circle",
                MouseCursor::NotAllowed => "crossed_circle",
                MouseCursor::Progress => "left_ptr_watch",

                /// Resize cursors
                MouseCursor::EResize => "right_side",
                MouseCursor::NResize => "top_side",
                MouseCursor::NeResize => "top_right_corner",
                MouseCursor::NwResize => "top_left_corner",
                MouseCursor::SResize => "bottom_side",
                MouseCursor::SeResize => "bottom_right_corner",
                MouseCursor::SwResize => "bottom_left_corner",
                MouseCursor::WResize => "left_side",
                MouseCursor::EwResize | MouseCursor::ColResize => "h_double_arrow",
                MouseCursor::NsResize | MouseCursor::RowResize => "v_double_arrow",
                MouseCursor::NwseResize => "bd_double_arrow",
                MouseCursor::NeswResize => "fd_double_arrow",

                MouseCursor::Text | MouseCursor::VerticalText => "xterm",
                MouseCursor::Wait => "watch",

                /// TODO: Find matching X11 cursors
                MouseCursor::ContextMenu | MouseCursor::NoneCursor |
                MouseCursor::AllScroll | MouseCursor::ZoomIn |
                MouseCursor::ZoomOut => "left_ptr",
            };
            let c_string = CString::new(cursor_name.as_bytes().to_vec()).unwrap();
            let xcursor = (self.x.display.xcursor.XcursorLibraryLoadCursor)(self.x.display.display, c_string.as_ptr());
            (self.x.display.xlib.XDefineCursor)(self.x.display.display, self.x.window, xcursor);
            (self.x.display.xlib.XFlush)(self.x.display.display);
        }
    }

    pub fn set_cursor_state(&self, state: CursorState) -> Result<(), String> {
        use CursorState::{ Grab, Normal };

        let mut cursor_state = self.cursor_state.lock().unwrap();

        match (state, *cursor_state) {
            (Normal, Grab) => {
                unsafe {
                    (self.x.display.xlib.XUngrabPointer)(self.x.display.display, ffi::CurrentTime);
                    *cursor_state = Normal;
                    Ok(())
                }
            },

            (Grab, Normal) => {
                unsafe {
                    *cursor_state = Grab;

                    match (self.x.display.xlib.XGrabPointer)(
                        self.x.display.display, self.x.window, ffi::False,
                        (ffi::ButtonPressMask | ffi::ButtonReleaseMask | ffi::EnterWindowMask |
                        ffi::LeaveWindowMask | ffi::PointerMotionMask | ffi::PointerMotionHintMask |
                        ffi::Button1MotionMask | ffi::Button2MotionMask | ffi::Button3MotionMask |
                        ffi::Button4MotionMask | ffi::Button5MotionMask | ffi::ButtonMotionMask |
                        ffi::KeymapStateMask) as libc::c_uint,
                        ffi::GrabModeAsync, ffi::GrabModeAsync,
                        self.x.window, 0, ffi::CurrentTime
                    ) {
                        ffi::GrabSuccess => Ok(()),
                        ffi::AlreadyGrabbed | ffi::GrabInvalidTime |
                        ffi::GrabNotViewable | ffi::GrabFrozen
                            => Err("cursor could not be grabbed".to_string()),
                        _ => unreachable!(),
                    }
                }
            },

            // Nothing needs to change
            (Grab, Grab) | (Normal, Normal) => Ok(()),

            _ => unimplemented!(),
        }
    }

    pub fn hidpi_factor(&self) -> f32 {
        1.0
    }

    pub fn set_cursor_position(&self, x: i32, y: i32) -> Result<(), ()> {
        unsafe {
            (self.x.display.xlib.XWarpPointer)(self.x.display.display, 0, self.x.window, 0, 0, 0, 0, x, y);
        }

        Ok(())
    }
}

impl GlContext for Window {
    unsafe fn make_current(&self) -> Result<(), ContextError> {
        match self.x.context {
            Context::Glx(ref ctxt) => ctxt.make_current(),
            Context::Egl(ref ctxt) => ctxt.make_current(),
            Context::None => Ok(())
        }
    }

    fn is_current(&self) -> bool {
        match self.x.context {
            Context::Glx(ref ctxt) => ctxt.is_current(),
            Context::Egl(ref ctxt) => ctxt.is_current(),
            Context::None => panic!()
        }
    }

    fn get_proc_address(&self, addr: &str) -> *const libc::c_void {
        match self.x.context {
            Context::Glx(ref ctxt) => ctxt.get_proc_address(addr),
            Context::Egl(ref ctxt) => ctxt.get_proc_address(addr),
            Context::None => ptr::null()
        }
    }

    fn swap_buffers(&self) -> Result<(), ContextError> {
        match self.x.context {
            Context::Glx(ref ctxt) => ctxt.swap_buffers(),
            Context::Egl(ref ctxt) => ctxt.swap_buffers(),
            Context::None => Ok(())
        }
    }

    fn get_api(&self) -> Api {
        match self.x.context {
            Context::Glx(ref ctxt) => ctxt.get_api(),
            Context::Egl(ref ctxt) => ctxt.get_api(),
            Context::None => panic!()
        }
    }

    fn get_pixel_format(&self) -> PixelFormat {
        match self.x.context {
            Context::Glx(ref ctxt) => ctxt.get_pixel_format(),
            Context::Egl(ref ctxt) => ctxt.get_pixel_format(),
            Context::None => panic!()
        }
    }
}