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1//========================================================================
2// GLFW 3.5 Wayland - www.glfw.org
3//------------------------------------------------------------------------
4// Copyright (c) 2014 Jonas Ådahl <[email protected]>
5//
6// This software is provided 'as-is', without any express or implied
7// warranty. In no event will the authors be held liable for any damages
8// arising from the use of this software.
9//
10// Permission is granted to anyone to use this software for any purpose,
11// including commercial applications, and to alter it and redistribute it
12// freely, subject to the following restrictions:
13//
14// 1. The origin of this software must not be misrepresented; you must not
15//    claim that you wrote the original software. If you use this software
16//    in a product, an acknowledgment in the product documentation would
17//    be appreciated but is not required.
18//
19// 2. Altered source versions must be plainly marked as such, and must not
20//    be misrepresented as being the original software.
21//
22// 3. This notice may not be removed or altered from any source
23//    distribution.
24//
25//========================================================================
26
27#define _GNU_SOURCE
28
29#include "internal.h"
30
31#if defined(_GLFW_WAYLAND)
32
33#include <stdio.h>
34#include <stdlib.h>
35#include <errno.h>
36#include <assert.h>
37#include <unistd.h>
38#include <string.h>
39#include <fcntl.h>
40#include <sys/mman.h>
41#include <sys/timerfd.h>
42#include <poll.h>
43#include <linux/input-event-codes.h>
44
45#include "wayland-client-protocol.h"
46#include "xdg-shell-client-protocol.h"
47#include "xdg-decoration-unstable-v1-client-protocol.h"
48#include "viewporter-client-protocol.h"
49#include "relative-pointer-unstable-v1-client-protocol.h"
50#include "pointer-constraints-unstable-v1-client-protocol.h"
51#include "xdg-activation-v1-client-protocol.h"
52#include "idle-inhibit-unstable-v1-client-protocol.h"
53#include "fractional-scale-v1-client-protocol.h"
54
55#define GLFW_BORDER_SIZE    4
56#define GLFW_CAPTION_HEIGHT 24
57
58static int createTmpfileCloexec(char* tmpname)
59{
60    int fd;
61
62    fd = mkostemp(tmpname, O_CLOEXEC);
63    if (fd >= 0)
64        unlink(tmpname);
65
66    return fd;
67}
68
69/*
70 * Create a new, unique, anonymous file of the given size, and
71 * return the file descriptor for it. The file descriptor is set
72 * CLOEXEC. The file is immediately suitable for mmap()'ing
73 * the given size at offset zero.
74 *
75 * The file should not have a permanent backing store like a disk,
76 * but may have if XDG_RUNTIME_DIR is not properly implemented in OS.
77 *
78 * The file name is deleted from the file system.
79 *
80 * The file is suitable for buffer sharing between processes by
81 * transmitting the file descriptor over Unix sockets using the
82 * SCM_RIGHTS methods.
83 *
84 * posix_fallocate() is used to guarantee that disk space is available
85 * for the file at the given size. If disk space is insufficient, errno
86 * is set to ENOSPC. If posix_fallocate() is not supported, program may
87 * receive SIGBUS on accessing mmap()'ed file contents instead.
88 */
89static int createAnonymousFile(off_t size)
90{
91    static const char template[] = "/glfw-shared-XXXXXX";
92    const char* path;
93    char* name;
94    int fd;
95    int ret;
96
97#ifdef HAVE_MEMFD_CREATE
98    fd = memfd_create("glfw-shared", MFD_CLOEXEC | MFD_ALLOW_SEALING);
99    if (fd >= 0)
100    {
101        // We can add this seal before calling posix_fallocate(), as the file
102        // is currently zero-sized anyway.
103        //
104        // There is also no need to check for the return value, we couldn’t do
105        // anything with it anyway.
106        fcntl(fd, F_ADD_SEALS, F_SEAL_SHRINK | F_SEAL_SEAL);
107    }
108    else
109#elif defined(SHM_ANON)
110    fd = shm_open(SHM_ANON, O_RDWR | O_CLOEXEC, 0600);
111    if (fd < 0)
112#endif
113    {
114        path = getenv("XDG_RUNTIME_DIR");
115        if (!path)
116        {
117            errno = ENOENT;
118            return -1;
119        }
120
121        name = _glfw_calloc(strlen(path) + sizeof(template), 1);
122        strcpy(name, path);
123        strcat(name, template);
124
125        fd = createTmpfileCloexec(name);
126        _glfw_free(name);
127        if (fd < 0)
128            return -1;
129    }
130
131#if defined(SHM_ANON)
132    // posix_fallocate does not work on SHM descriptors
133    ret = ftruncate(fd, size);
134#else
135    ret = posix_fallocate(fd, 0, size);
136#endif
137    if (ret != 0)
138    {
139        close(fd);
140        errno = ret;
141        return -1;
142    }
143    return fd;
144}
145
146static struct wl_buffer* createShmBuffer(const GLFWimage* image)
147{
148    const int stride = image->width * 4;
149    const int length = image->width * image->height * 4;
150
151    const int fd = createAnonymousFile(length);
152    if (fd < 0)
153    {
154        _glfwInputError(GLFW_PLATFORM_ERROR,
155                        "Wayland: Failed to create buffer file of size %d: %s",
156                        length, strerror(errno));
157        return NULL;
158    }
159
160    void* data = mmap(NULL, length, PROT_READ | PROT_WRITE, MAP_SHARED, fd, 0);
161    if (data == MAP_FAILED)
162    {
163        _glfwInputError(GLFW_PLATFORM_ERROR,
164                        "Wayland: Failed to map file: %s", strerror(errno));
165        close(fd);
166        return NULL;
167    }
168
169    struct wl_shm_pool* pool = wl_shm_create_pool(_glfw.wl.shm, fd, length);
170
171    close(fd);
172
173    unsigned char* source = (unsigned char*) image->pixels;
174    unsigned char* target = data;
175    for (int i = 0;  i < image->width * image->height;  i++, source += 4)
176    {
177        unsigned int alpha = source[3];
178
179        *target++ = (unsigned char) ((source[2] * alpha) / 255);
180        *target++ = (unsigned char) ((source[1] * alpha) / 255);
181        *target++ = (unsigned char) ((source[0] * alpha) / 255);
182        *target++ = (unsigned char) alpha;
183    }
184
185    struct wl_buffer* buffer =
186        wl_shm_pool_create_buffer(pool, 0,
187                                  image->width,
188                                  image->height,
189                                  stride, WL_SHM_FORMAT_ARGB8888);
190    munmap(data, length);
191    wl_shm_pool_destroy(pool);
192
193    return buffer;
194}
195
196static void createFallbackEdge(_GLFWwindow* window,
197                               _GLFWfallbackEdgeWayland* edge,
198                               struct wl_surface* parent,
199                               struct wl_buffer* buffer,
200                               int x, int y,
201                               int width, int height)
202{
203    edge->surface = wl_compositor_create_surface(_glfw.wl.compositor);
204    wl_surface_set_user_data(edge->surface, window);
205    wl_proxy_set_tag((struct wl_proxy*) edge->surface, &_glfw.wl.tag);
206    edge->subsurface = wl_subcompositor_get_subsurface(_glfw.wl.subcompositor,
207                                                       edge->surface, parent);
208    wl_subsurface_set_position(edge->subsurface, x, y);
209    edge->viewport = wp_viewporter_get_viewport(_glfw.wl.viewporter,
210                                                edge->surface);
211    wp_viewport_set_destination(edge->viewport, width, height);
212    wl_surface_attach(edge->surface, buffer, 0, 0);
213
214    struct wl_region* region = wl_compositor_create_region(_glfw.wl.compositor);
215    wl_region_add(region, 0, 0, width, height);
216    wl_surface_set_opaque_region(edge->surface, region);
217    wl_surface_commit(edge->surface);
218    wl_region_destroy(region);
219}
220
221static void createFallbackDecorations(_GLFWwindow* window)
222{
223    unsigned char data[] = { 224, 224, 224, 255 };
224    const GLFWimage image = { 1, 1, data };
225
226    if (!_glfw.wl.viewporter)
227        return;
228
229    if (!window->wl.fallback.buffer)
230        window->wl.fallback.buffer = createShmBuffer(&image);
231    if (!window->wl.fallback.buffer)
232        return;
233
234    createFallbackEdge(window, &window->wl.fallback.top, window->wl.surface,
235                       window->wl.fallback.buffer,
236                       0, -GLFW_CAPTION_HEIGHT,
237                       window->wl.width, GLFW_CAPTION_HEIGHT);
238    createFallbackEdge(window, &window->wl.fallback.left, window->wl.surface,
239                       window->wl.fallback.buffer,
240                       -GLFW_BORDER_SIZE, -GLFW_CAPTION_HEIGHT,
241                       GLFW_BORDER_SIZE, window->wl.height + GLFW_CAPTION_HEIGHT);
242    createFallbackEdge(window, &window->wl.fallback.right, window->wl.surface,
243                       window->wl.fallback.buffer,
244                       window->wl.width, -GLFW_CAPTION_HEIGHT,
245                       GLFW_BORDER_SIZE, window->wl.height + GLFW_CAPTION_HEIGHT);
246    createFallbackEdge(window, &window->wl.fallback.bottom, window->wl.surface,
247                       window->wl.fallback.buffer,
248                       -GLFW_BORDER_SIZE, window->wl.height,
249                       window->wl.width + GLFW_BORDER_SIZE * 2, GLFW_BORDER_SIZE);
250
251    window->wl.fallback.decorations = GLFW_TRUE;
252}
253
254static void destroyFallbackEdge(_GLFWfallbackEdgeWayland* edge)
255{
256    if (edge->subsurface)
257        wl_subsurface_destroy(edge->subsurface);
258    if (edge->surface)
259        wl_surface_destroy(edge->surface);
260    if (edge->viewport)
261        wp_viewport_destroy(edge->viewport);
262
263    edge->surface = NULL;
264    edge->subsurface = NULL;
265    edge->viewport = NULL;
266}
267
268static void destroyFallbackDecorations(_GLFWwindow* window)
269{
270    window->wl.fallback.decorations = GLFW_FALSE;
271
272    destroyFallbackEdge(&window->wl.fallback.top);
273    destroyFallbackEdge(&window->wl.fallback.left);
274    destroyFallbackEdge(&window->wl.fallback.right);
275    destroyFallbackEdge(&window->wl.fallback.bottom);
276}
277
278static void updateFallbackDecorationCursor(_GLFWwindow* window,
279                                           wl_fixed_t sx,
280                                           wl_fixed_t sy)
281{
282    window->wl.fallback.pointerX = sx;
283    window->wl.fallback.pointerY = sy;
284
285    const double xpos = wl_fixed_to_double(sx);
286    const double ypos = wl_fixed_to_double(sy);
287    const char* cursorName = "left_ptr";
288
289    if (window->resizable)
290    {
291        if (window->wl.fallback.focus == window->wl.fallback.top.surface)
292        {
293            if (ypos < GLFW_BORDER_SIZE)
294                cursorName = "n-resize";
295        }
296        else if (window->wl.fallback.focus == window->wl.fallback.left.surface)
297        {
298            if (ypos < GLFW_BORDER_SIZE)
299                cursorName = "nw-resize";
300            else
301                cursorName = "w-resize";
302        }
303        else if (window->wl.fallback.focus == window->wl.fallback.right.surface)
304        {
305            if (ypos < GLFW_BORDER_SIZE)
306                cursorName = "ne-resize";
307            else
308                cursorName = "e-resize";
309        }
310        else if (window->wl.fallback.focus == window->wl.fallback.bottom.surface)
311        {
312            if (xpos < GLFW_BORDER_SIZE)
313                cursorName = "sw-resize";
314            else if (xpos > window->wl.width + GLFW_BORDER_SIZE)
315                cursorName = "se-resize";
316            else
317                cursorName = "s-resize";
318        }
319    }
320
321    if (window->wl.fallback.cursorName != cursorName)
322    {
323        struct wl_surface* surface = _glfw.wl.cursorSurface;
324        struct wl_cursor_theme* theme = _glfw.wl.cursorTheme;
325        int scale = 1;
326
327        if (window->wl.bufferScale > 1 && _glfw.wl.cursorThemeHiDPI)
328        {
329            // We only support up to scale=2 for now, since libwayland-cursor
330            // requires us to load a different theme for each size.
331            scale = 2;
332            theme = _glfw.wl.cursorThemeHiDPI;
333        }
334
335        struct wl_cursor* cursor = wl_cursor_theme_get_cursor(theme, cursorName);
336        if (!cursor)
337            return;
338
339        // TODO: handle animated cursors too.
340        struct wl_cursor_image* image = cursor->images[0];
341        if (!image)
342            return;
343
344        struct wl_buffer* buffer = wl_cursor_image_get_buffer(image);
345        if (!buffer)
346            return;
347
348        wl_pointer_set_cursor(_glfw.wl.pointer, _glfw.wl.pointerEnterSerial,
349                              surface,
350                              image->hotspot_x / scale,
351                              image->hotspot_y / scale);
352        wl_surface_set_buffer_scale(surface, scale);
353        wl_surface_attach(surface, buffer, 0, 0);
354        wl_surface_damage(surface, 0, 0, image->width, image->height);
355        wl_surface_commit(surface);
356
357        window->wl.fallback.cursorName = cursorName;
358    }
359}
360
361static void handleFallbackDecorationButton(_GLFWwindow* window,
362                                           uint32_t serial,
363                                           uint32_t button)
364{
365    const double xpos = wl_fixed_to_double(window->wl.fallback.pointerX);
366    const double ypos = wl_fixed_to_double(window->wl.fallback.pointerY);
367
368    if (button == BTN_LEFT)
369    {
370        uint32_t edges = XDG_TOPLEVEL_RESIZE_EDGE_NONE;
371
372        if (window->wl.fallback.focus == window->wl.fallback.top.surface)
373        {
374            if (ypos < GLFW_BORDER_SIZE)
375                edges = XDG_TOPLEVEL_RESIZE_EDGE_TOP;
376            else
377                xdg_toplevel_move(window->wl.xdg.toplevel, _glfw.wl.seat, serial);
378        }
379        else if (window->wl.fallback.focus == window->wl.fallback.left.surface)
380        {
381            if (ypos < GLFW_BORDER_SIZE)
382                edges = XDG_TOPLEVEL_RESIZE_EDGE_TOP_LEFT;
383            else
384                edges = XDG_TOPLEVEL_RESIZE_EDGE_LEFT;
385        }
386        else if (window->wl.fallback.focus == window->wl.fallback.right.surface)
387        {
388            if (ypos < GLFW_BORDER_SIZE)
389                edges = XDG_TOPLEVEL_RESIZE_EDGE_TOP_RIGHT;
390            else
391                edges = XDG_TOPLEVEL_RESIZE_EDGE_RIGHT;
392        }
393        else if (window->wl.fallback.focus == window->wl.fallback.bottom.surface)
394        {
395            if (xpos < GLFW_BORDER_SIZE)
396                edges = XDG_TOPLEVEL_RESIZE_EDGE_BOTTOM_LEFT;
397            else if (xpos > window->wl.width + GLFW_BORDER_SIZE)
398                edges = XDG_TOPLEVEL_RESIZE_EDGE_BOTTOM_RIGHT;
399            else
400                edges = XDG_TOPLEVEL_RESIZE_EDGE_BOTTOM;
401        }
402
403        if (edges != XDG_TOPLEVEL_RESIZE_EDGE_NONE)
404            xdg_toplevel_resize(window->wl.xdg.toplevel, _glfw.wl.seat, serial, edges);
405    }
406    else if (button == BTN_RIGHT)
407    {
408        if (!window->wl.xdg.toplevel)
409            return;
410
411        if (window->wl.fallback.focus != window->wl.fallback.top.surface)
412            return;
413
414        if (ypos < GLFW_BORDER_SIZE)
415            return;
416
417        xdg_toplevel_show_window_menu(window->wl.xdg.toplevel,
418                                      _glfw.wl.seat, serial,
419                                      xpos,
420                                      ypos - GLFW_CAPTION_HEIGHT - GLFW_BORDER_SIZE);
421    }
422}
423
424static void xdgDecorationHandleConfigure(void* userData,
425                                         struct zxdg_toplevel_decoration_v1* decoration,
426                                         uint32_t mode)
427{
428    _GLFWwindow* window = userData;
429
430    window->wl.xdg.decorationMode = mode;
431
432    if (mode == ZXDG_TOPLEVEL_DECORATION_V1_MODE_CLIENT_SIDE)
433    {
434        if (window->decorated && !window->monitor)
435            createFallbackDecorations(window);
436    }
437    else
438        destroyFallbackDecorations(window);
439}
440
441static const struct zxdg_toplevel_decoration_v1_listener xdgDecorationListener =
442{
443    xdgDecorationHandleConfigure,
444};
445
446// Makes the surface considered as XRGB instead of ARGB.
447static void setContentAreaOpaque(_GLFWwindow* window)
448{
449    struct wl_region* region;
450
451    region = wl_compositor_create_region(_glfw.wl.compositor);
452    if (!region)
453        return;
454
455    wl_region_add(region, 0, 0, window->wl.width, window->wl.height);
456    wl_surface_set_opaque_region(window->wl.surface, region);
457    wl_region_destroy(region);
458}
459
460static void resizeFramebuffer(_GLFWwindow* window)
461{
462    if (window->wl.fractionalScale)
463    {
464        window->wl.fbWidth = (window->wl.width * window->wl.scalingNumerator) / 120;
465        window->wl.fbHeight = (window->wl.height * window->wl.scalingNumerator) / 120;
466    }
467    else
468    {
469        window->wl.fbWidth = window->wl.width * window->wl.bufferScale;
470        window->wl.fbHeight = window->wl.height * window->wl.bufferScale;
471    }
472
473    if (window->wl.egl.window)
474    {
475        wl_egl_window_resize(window->wl.egl.window,
476                             window->wl.fbWidth,
477                             window->wl.fbHeight,
478                             0, 0);
479    }
480
481    if (!window->wl.transparent)
482        setContentAreaOpaque(window);
483
484    _glfwInputFramebufferSize(window, window->wl.fbWidth, window->wl.fbHeight);
485}
486
487static GLFWbool resizeWindow(_GLFWwindow* window, int width, int height)
488{
489    width = _glfw_max(width, 1);
490    height = _glfw_max(height, 1);
491
492    if (width == window->wl.width && height == window->wl.height)
493        return GLFW_FALSE;
494
495    window->wl.width = width;
496    window->wl.height = height;
497
498    resizeFramebuffer(window);
499
500    if (window->wl.scalingViewport)
501    {
502        wp_viewport_set_destination(window->wl.scalingViewport,
503                                    window->wl.width,
504                                    window->wl.height);
505    }
506
507    if (window->wl.fallback.decorations)
508    {
509        wp_viewport_set_destination(window->wl.fallback.top.viewport,
510                                    window->wl.width,
511                                    GLFW_CAPTION_HEIGHT);
512        wl_surface_commit(window->wl.fallback.top.surface);
513
514        wp_viewport_set_destination(window->wl.fallback.left.viewport,
515                                    GLFW_BORDER_SIZE,
516                                    window->wl.height + GLFW_CAPTION_HEIGHT);
517        wl_surface_commit(window->wl.fallback.left.surface);
518
519        wl_subsurface_set_position(window->wl.fallback.right.subsurface,
520                                window->wl.width, -GLFW_CAPTION_HEIGHT);
521        wp_viewport_set_destination(window->wl.fallback.right.viewport,
522                                    GLFW_BORDER_SIZE,
523                                    window->wl.height + GLFW_CAPTION_HEIGHT);
524        wl_surface_commit(window->wl.fallback.right.surface);
525
526        wl_subsurface_set_position(window->wl.fallback.bottom.subsurface,
527                                -GLFW_BORDER_SIZE, window->wl.height);
528        wp_viewport_set_destination(window->wl.fallback.bottom.viewport,
529                                    window->wl.width + GLFW_BORDER_SIZE * 2,
530                                    GLFW_BORDER_SIZE);
531        wl_surface_commit(window->wl.fallback.bottom.surface);
532    }
533
534    return GLFW_TRUE;
535}
536
537void _glfwUpdateBufferScaleFromOutputsWayland(_GLFWwindow* window)
538{
539    if (wl_compositor_get_version(_glfw.wl.compositor) <
540        WL_SURFACE_SET_BUFFER_SCALE_SINCE_VERSION)
541    {
542        return;
543    }
544
545    if (!window->wl.scaleFramebuffer)
546        return;
547
548    // When using fractional scaling, the buffer scale should remain at 1
549    if (window->wl.fractionalScale)
550        return;
551
552    // Get the scale factor from the highest scale monitor.
553    int32_t maxScale = 1;
554
555    for (size_t i = 0; i < window->wl.outputScaleCount; i++)
556        maxScale = _glfw_max(window->wl.outputScales[i].factor, maxScale);
557
558    // Only change the framebuffer size if the scale changed.
559    if (window->wl.bufferScale != maxScale)
560    {
561        window->wl.bufferScale = maxScale;
562        wl_surface_set_buffer_scale(window->wl.surface, maxScale);
563        _glfwInputWindowContentScale(window, maxScale, maxScale);
564        resizeFramebuffer(window);
565
566        if (window->wl.visible)
567            _glfwInputWindowDamage(window);
568    }
569}
570
571static void surfaceHandleEnter(void* userData,
572                               struct wl_surface* surface,
573                               struct wl_output* output)
574{
575    if (wl_proxy_get_tag((struct wl_proxy*) output) != &_glfw.wl.tag)
576        return;
577
578    _GLFWwindow* window = userData;
579    _GLFWmonitor* monitor = wl_output_get_user_data(output);
580    if (!window || !monitor)
581        return;
582
583    if (window->wl.outputScaleCount + 1 > window->wl.outputScaleSize)
584    {
585        window->wl.outputScaleSize++;
586        window->wl.outputScales =
587            _glfw_realloc(window->wl.outputScales,
588                          window->wl.outputScaleSize * sizeof(_GLFWscaleWayland));
589    }
590
591    window->wl.outputScaleCount++;
592    window->wl.outputScales[window->wl.outputScaleCount - 1] =
593        (_GLFWscaleWayland) { output, monitor->wl.scale };
594
595    _glfwUpdateBufferScaleFromOutputsWayland(window);
596}
597
598static void surfaceHandleLeave(void* userData,
599                               struct wl_surface* surface,
600                               struct wl_output* output)
601{
602    if (wl_proxy_get_tag((struct wl_proxy*) output) != &_glfw.wl.tag)
603        return;
604
605    _GLFWwindow* window = userData;
606
607    for (size_t i = 0; i < window->wl.outputScaleCount; i++)
608    {
609        if (window->wl.outputScales[i].output == output)
610        {
611            window->wl.outputScales[i] =
612                window->wl.outputScales[window->wl.outputScaleCount - 1];
613            window->wl.outputScaleCount--;
614            break;
615        }
616    }
617
618    _glfwUpdateBufferScaleFromOutputsWayland(window);
619}
620
621static const struct wl_surface_listener surfaceListener =
622{
623    surfaceHandleEnter,
624    surfaceHandleLeave
625};
626
627static void setIdleInhibitor(_GLFWwindow* window, GLFWbool enable)
628{
629    if (enable && !window->wl.idleInhibitor && _glfw.wl.idleInhibitManager)
630    {
631        window->wl.idleInhibitor =
632            zwp_idle_inhibit_manager_v1_create_inhibitor(
633                _glfw.wl.idleInhibitManager, window->wl.surface);
634        if (!window->wl.idleInhibitor)
635            _glfwInputError(GLFW_PLATFORM_ERROR,
636                            "Wayland: Failed to create idle inhibitor");
637    }
638    else if (!enable && window->wl.idleInhibitor)
639    {
640        zwp_idle_inhibitor_v1_destroy(window->wl.idleInhibitor);
641        window->wl.idleInhibitor = NULL;
642    }
643}
644
645// Make the specified window and its video mode active on its monitor
646//
647static void acquireMonitor(_GLFWwindow* window)
648{
649    if (window->wl.libdecor.frame)
650    {
651        libdecor_frame_set_fullscreen(window->wl.libdecor.frame,
652                                      window->monitor->wl.output);
653    }
654    else if (window->wl.xdg.toplevel)
655    {
656        xdg_toplevel_set_fullscreen(window->wl.xdg.toplevel,
657                                    window->monitor->wl.output);
658    }
659
660    setIdleInhibitor(window, GLFW_TRUE);
661
662    if (window->wl.fallback.decorations)
663        destroyFallbackDecorations(window);
664}
665
666// Remove the window and restore the original video mode
667//
668static void releaseMonitor(_GLFWwindow* window)
669{
670    if (window->wl.libdecor.frame)
671        libdecor_frame_unset_fullscreen(window->wl.libdecor.frame);
672    else if (window->wl.xdg.toplevel)
673        xdg_toplevel_unset_fullscreen(window->wl.xdg.toplevel);
674
675    setIdleInhibitor(window, GLFW_FALSE);
676
677    if (!window->wl.libdecor.frame &&
678        window->wl.xdg.decorationMode != ZXDG_TOPLEVEL_DECORATION_V1_MODE_SERVER_SIDE)
679    {
680        if (window->decorated)
681            createFallbackDecorations(window);
682    }
683}
684
685void fractionalScaleHandlePreferredScale(void* userData,
686                                         struct wp_fractional_scale_v1* fractionalScale,
687                                         uint32_t numerator)
688{
689    _GLFWwindow* window = userData;
690
691    window->wl.scalingNumerator = numerator;
692    _glfwInputWindowContentScale(window, numerator / 120.f, numerator / 120.f);
693    resizeFramebuffer(window);
694
695    if (window->wl.visible)
696        _glfwInputWindowDamage(window);
697}
698
699const struct wp_fractional_scale_v1_listener fractionalScaleListener =
700{
701    fractionalScaleHandlePreferredScale,
702};
703
704static void xdgToplevelHandleConfigure(void* userData,
705                                       struct xdg_toplevel* toplevel,
706                                       int32_t width,
707                                       int32_t height,
708                                       struct wl_array* states)
709{
710    _GLFWwindow* window = userData;
711    uint32_t* state;
712
713    window->wl.pending.activated  = GLFW_FALSE;
714    window->wl.pending.maximized  = GLFW_FALSE;
715    window->wl.pending.fullscreen = GLFW_FALSE;
716
717    wl_array_for_each(state, states)
718    {
719        switch (*state)
720        {
721            case XDG_TOPLEVEL_STATE_MAXIMIZED:
722                window->wl.pending.maximized = GLFW_TRUE;
723                break;
724            case XDG_TOPLEVEL_STATE_FULLSCREEN:
725                window->wl.pending.fullscreen = GLFW_TRUE;
726                break;
727            case XDG_TOPLEVEL_STATE_RESIZING:
728                break;
729            case XDG_TOPLEVEL_STATE_ACTIVATED:
730                window->wl.pending.activated = GLFW_TRUE;
731                break;
732        }
733    }
734
735    if (width && height)
736    {
737        if (window->wl.fallback.decorations)
738        {
739            window->wl.pending.width  = _glfw_max(0, width - GLFW_BORDER_SIZE * 2);
740            window->wl.pending.height =
741                _glfw_max(0, height - GLFW_BORDER_SIZE - GLFW_CAPTION_HEIGHT);
742        }
743        else
744        {
745            window->wl.pending.width  = width;
746            window->wl.pending.height = height;
747        }
748    }
749    else
750    {
751        window->wl.pending.width  = window->wl.width;
752        window->wl.pending.height = window->wl.height;
753    }
754}
755
756static void xdgToplevelHandleClose(void* userData,
757                                   struct xdg_toplevel* toplevel)
758{
759    _GLFWwindow* window = userData;
760    _glfwInputWindowCloseRequest(window);
761}
762
763static const struct xdg_toplevel_listener xdgToplevelListener =
764{
765    xdgToplevelHandleConfigure,
766    xdgToplevelHandleClose
767};
768
769static void xdgSurfaceHandleConfigure(void* userData,
770                                      struct xdg_surface* surface,
771                                      uint32_t serial)
772{
773    _GLFWwindow* window = userData;
774
775    xdg_surface_ack_configure(surface, serial);
776
777    if (window->wl.activated != window->wl.pending.activated)
778    {
779        window->wl.activated = window->wl.pending.activated;
780        if (!window->wl.activated)
781        {
782            if (window->monitor && window->autoIconify)
783                xdg_toplevel_set_minimized(window->wl.xdg.toplevel);
784        }
785    }
786
787    if (window->wl.maximized != window->wl.pending.maximized)
788    {
789        window->wl.maximized = window->wl.pending.maximized;
790        _glfwInputWindowMaximize(window, window->wl.maximized);
791    }
792
793    window->wl.fullscreen = window->wl.pending.fullscreen;
794
795    int width  = window->wl.pending.width;
796    int height = window->wl.pending.height;
797
798    if (!window->wl.maximized && !window->wl.fullscreen)
799    {
800        if (window->numer != GLFW_DONT_CARE && window->denom != GLFW_DONT_CARE)
801        {
802            const float aspectRatio = (float) width / (float) height;
803            const float targetRatio = (float) window->numer / (float) window->denom;
804            if (aspectRatio < targetRatio)
805                height = width / targetRatio;
806            else if (aspectRatio > targetRatio)
807                width = height * targetRatio;
808        }
809    }
810
811    if (resizeWindow(window, width, height))
812    {
813        _glfwInputWindowSize(window, window->wl.width, window->wl.height);
814
815        if (window->wl.visible)
816            _glfwInputWindowDamage(window);
817    }
818
819    if (!window->wl.visible)
820    {
821        // Allow the window to be mapped only if it either has no XDG
822        // decorations or they have already received a configure event
823        if (!window->wl.xdg.decoration || window->wl.xdg.decorationMode)
824        {
825            window->wl.visible = GLFW_TRUE;
826            _glfwInputWindowDamage(window);
827        }
828    }
829}
830
831static const struct xdg_surface_listener xdgSurfaceListener =
832{
833    xdgSurfaceHandleConfigure
834};
835
836void libdecorFrameHandleConfigure(struct libdecor_frame* frame,
837                                  struct libdecor_configuration* config,
838                                  void* userData)
839{
840    _GLFWwindow* window = userData;
841    int width, height;
842
843    enum libdecor_window_state windowState;
844    GLFWbool fullscreen, activated, maximized;
845
846    if (libdecor_configuration_get_window_state(config, &windowState))
847    {
848        fullscreen = (windowState & LIBDECOR_WINDOW_STATE_FULLSCREEN) != 0;
849        activated = (windowState & LIBDECOR_WINDOW_STATE_ACTIVE) != 0;
850        maximized = (windowState & LIBDECOR_WINDOW_STATE_MAXIMIZED) != 0;
851    }
852    else
853    {
854        fullscreen = window->wl.fullscreen;
855        activated = window->wl.activated;
856        maximized = window->wl.maximized;
857    }
858
859    if (!libdecor_configuration_get_content_size(config, frame, &width, &height))
860    {
861        width = window->wl.width;
862        height = window->wl.height;
863    }
864
865    if (!maximized && !fullscreen)
866    {
867        if (window->numer != GLFW_DONT_CARE && window->denom != GLFW_DONT_CARE)
868        {
869            const float aspectRatio = (float) width / (float) height;
870            const float targetRatio = (float) window->numer / (float) window->denom;
871            if (aspectRatio < targetRatio)
872                height = width / targetRatio;
873            else if (aspectRatio > targetRatio)
874                width = height * targetRatio;
875        }
876    }
877
878    struct libdecor_state* frameState = libdecor_state_new(width, height);
879    libdecor_frame_commit(frame, frameState, config);
880    libdecor_state_free(frameState);
881
882    if (window->wl.activated != activated)
883    {
884        window->wl.activated = activated;
885        if (!window->wl.activated)
886        {
887            if (window->monitor && window->autoIconify)
888                libdecor_frame_set_minimized(window->wl.libdecor.frame);
889        }
890    }
891
892    if (window->wl.maximized != maximized)
893    {
894        window->wl.maximized = maximized;
895        _glfwInputWindowMaximize(window, window->wl.maximized);
896    }
897
898    window->wl.fullscreen = fullscreen;
899
900    GLFWbool damaged = GLFW_FALSE;
901
902    if (!window->wl.visible)
903    {
904        window->wl.visible = GLFW_TRUE;
905        damaged = GLFW_TRUE;
906    }
907
908    if (resizeWindow(window, width, height))
909    {
910        _glfwInputWindowSize(window, window->wl.width, window->wl.height);
911        damaged = GLFW_TRUE;
912    }
913
914    if (damaged)
915        _glfwInputWindowDamage(window);
916    else
917        wl_surface_commit(window->wl.surface);
918}
919
920void libdecorFrameHandleClose(struct libdecor_frame* frame, void* userData)
921{
922    _GLFWwindow* window = userData;
923    _glfwInputWindowCloseRequest(window);
924}
925
926void libdecorFrameHandleCommit(struct libdecor_frame* frame, void* userData)
927{
928    _GLFWwindow* window = userData;
929    wl_surface_commit(window->wl.surface);
930}
931
932void libdecorFrameHandleDismissPopup(struct libdecor_frame* frame,
933                                     const char* seatName,
934                                     void* userData)
935{
936}
937
938static const struct libdecor_frame_interface libdecorFrameInterface =
939{
940    libdecorFrameHandleConfigure,
941    libdecorFrameHandleClose,
942    libdecorFrameHandleCommit,
943    libdecorFrameHandleDismissPopup
944};
945
946static GLFWbool createLibdecorFrame(_GLFWwindow* window)
947{
948    // Allow libdecor to finish initialization of itself and its plugin
949    while (!_glfw.wl.libdecor.ready)
950        _glfwWaitEventsWayland();
951
952    window->wl.libdecor.frame = libdecor_decorate(_glfw.wl.libdecor.context,
953                                                  window->wl.surface,
954                                                  &libdecorFrameInterface,
955                                                  window);
956    if (!window->wl.libdecor.frame)
957    {
958        _glfwInputError(GLFW_PLATFORM_ERROR,
959                        "Wayland: Failed to create libdecor frame");
960        return GLFW_FALSE;
961    }
962
963    struct libdecor_state* frameState =
964        libdecor_state_new(window->wl.width, window->wl.height);
965    libdecor_frame_commit(window->wl.libdecor.frame, frameState, NULL);
966    libdecor_state_free(frameState);
967
968    if (strlen(window->wl.appId))
969        libdecor_frame_set_app_id(window->wl.libdecor.frame, window->wl.appId);
970
971    libdecor_frame_set_title(window->wl.libdecor.frame, window->title);
972
973    if (window->minwidth != GLFW_DONT_CARE &&
974        window->minheight != GLFW_DONT_CARE)
975    {
976        libdecor_frame_set_min_content_size(window->wl.libdecor.frame,
977                                            window->minwidth,
978                                            window->minheight);
979    }
980
981    if (window->maxwidth != GLFW_DONT_CARE &&
982        window->maxheight != GLFW_DONT_CARE)
983    {
984        libdecor_frame_set_max_content_size(window->wl.libdecor.frame,
985                                            window->maxwidth,
986                                            window->maxheight);
987    }
988
989    if (!window->resizable)
990    {
991        libdecor_frame_unset_capabilities(window->wl.libdecor.frame,
992                                          LIBDECOR_ACTION_RESIZE);
993    }
994
995    if (window->monitor)
996    {
997        libdecor_frame_set_fullscreen(window->wl.libdecor.frame,
998                                      window->monitor->wl.output);
999        setIdleInhibitor(window, GLFW_TRUE);
1000    }
1001    else
1002    {
1003        if (window->wl.maximized)
1004            libdecor_frame_set_maximized(window->wl.libdecor.frame);
1005
1006        if (!window->decorated)
1007            libdecor_frame_set_visibility(window->wl.libdecor.frame, false);
1008
1009        setIdleInhibitor(window, GLFW_FALSE);
1010    }
1011
1012    libdecor_frame_map(window->wl.libdecor.frame);
1013    wl_display_roundtrip(_glfw.wl.display);
1014    return GLFW_TRUE;
1015}
1016
1017static void updateXdgSizeLimits(_GLFWwindow* window)
1018{
1019    int minwidth, minheight, maxwidth, maxheight;
1020
1021    if (window->resizable)
1022    {
1023        if (window->minwidth == GLFW_DONT_CARE || window->minheight == GLFW_DONT_CARE)
1024            minwidth = minheight = 0;
1025        else
1026        {
1027            minwidth  = window->minwidth;
1028            minheight = window->minheight;
1029
1030            if (window->wl.fallback.decorations)
1031            {
1032                minwidth  += GLFW_BORDER_SIZE * 2;
1033                minheight += GLFW_CAPTION_HEIGHT + GLFW_BORDER_SIZE;
1034            }
1035        }
1036
1037        if (window->maxwidth == GLFW_DONT_CARE || window->maxheight == GLFW_DONT_CARE)
1038            maxwidth = maxheight = 0;
1039        else
1040        {
1041            maxwidth  = window->maxwidth;
1042            maxheight = window->maxheight;
1043
1044            if (window->wl.fallback.decorations)
1045            {
1046                maxwidth  += GLFW_BORDER_SIZE * 2;
1047                maxheight += GLFW_CAPTION_HEIGHT + GLFW_BORDER_SIZE;
1048            }
1049        }
1050    }
1051    else
1052    {
1053        minwidth = maxwidth = window->wl.width;
1054        minheight = maxheight = window->wl.height;
1055    }
1056
1057    xdg_toplevel_set_min_size(window->wl.xdg.toplevel, minwidth, minheight);
1058    xdg_toplevel_set_max_size(window->wl.xdg.toplevel, maxwidth, maxheight);
1059}
1060
1061static GLFWbool createXdgShellObjects(_GLFWwindow* window)
1062{
1063    window->wl.xdg.surface = xdg_wm_base_get_xdg_surface(_glfw.wl.wmBase,
1064                                                         window->wl.surface);
1065    if (!window->wl.xdg.surface)
1066    {
1067        _glfwInputError(GLFW_PLATFORM_ERROR,
1068                        "Wayland: Failed to create xdg-surface for window");
1069        return GLFW_FALSE;
1070    }
1071
1072    xdg_surface_add_listener(window->wl.xdg.surface, &xdgSurfaceListener, window);
1073
1074    window->wl.xdg.toplevel = xdg_surface_get_toplevel(window->wl.xdg.surface);
1075    if (!window->wl.xdg.toplevel)
1076    {
1077        _glfwInputError(GLFW_PLATFORM_ERROR,
1078                        "Wayland: Failed to create xdg-toplevel for window");
1079        return GLFW_FALSE;
1080    }
1081
1082    xdg_toplevel_add_listener(window->wl.xdg.toplevel, &xdgToplevelListener, window);
1083
1084    if (window->wl.appId)
1085        xdg_toplevel_set_app_id(window->wl.xdg.toplevel, window->wl.appId);
1086
1087    xdg_toplevel_set_title(window->wl.xdg.toplevel, window->title);
1088
1089    if (window->monitor)
1090    {
1091        xdg_toplevel_set_fullscreen(window->wl.xdg.toplevel, window->monitor->wl.output);
1092        setIdleInhibitor(window, GLFW_TRUE);
1093    }
1094    else
1095    {
1096        if (window->wl.maximized)
1097            xdg_toplevel_set_maximized(window->wl.xdg.toplevel);
1098
1099        setIdleInhibitor(window, GLFW_FALSE);
1100    }
1101
1102    if (_glfw.wl.decorationManager)
1103    {
1104        window->wl.xdg.decoration =
1105            zxdg_decoration_manager_v1_get_toplevel_decoration(
1106                _glfw.wl.decorationManager, window->wl.xdg.toplevel);
1107        zxdg_toplevel_decoration_v1_add_listener(window->wl.xdg.decoration,
1108                                                 &xdgDecorationListener,
1109                                                 window);
1110
1111        uint32_t mode;
1112
1113        if (window->decorated)
1114            mode = ZXDG_TOPLEVEL_DECORATION_V1_MODE_SERVER_SIDE;
1115        else
1116            mode = ZXDG_TOPLEVEL_DECORATION_V1_MODE_CLIENT_SIDE;
1117
1118        zxdg_toplevel_decoration_v1_set_mode(window->wl.xdg.decoration, mode);
1119    }
1120    else
1121    {
1122        if (window->decorated && !window->monitor)
1123            createFallbackDecorations(window);
1124    }
1125
1126    updateXdgSizeLimits(window);
1127
1128    wl_surface_commit(window->wl.surface);
1129    wl_display_roundtrip(_glfw.wl.display);
1130    return GLFW_TRUE;
1131}
1132
1133static GLFWbool createShellObjects(_GLFWwindow* window)
1134{
1135    if (_glfw.wl.libdecor.context)
1136    {
1137        if (createLibdecorFrame(window))
1138            return GLFW_TRUE;
1139    }
1140
1141    return createXdgShellObjects(window);
1142}
1143
1144static void destroyShellObjects(_GLFWwindow* window)
1145{
1146    destroyFallbackDecorations(window);
1147
1148    if (window->wl.libdecor.frame)
1149        libdecor_frame_unref(window->wl.libdecor.frame);
1150
1151    if (window->wl.xdg.decoration)
1152        zxdg_toplevel_decoration_v1_destroy(window->wl.xdg.decoration);
1153
1154    if (window->wl.xdg.toplevel)
1155        xdg_toplevel_destroy(window->wl.xdg.toplevel);
1156
1157    if (window->wl.xdg.surface)
1158        xdg_surface_destroy(window->wl.xdg.surface);
1159
1160    window->wl.libdecor.frame = NULL;
1161    window->wl.xdg.decoration = NULL;
1162    window->wl.xdg.decorationMode = 0;
1163    window->wl.xdg.toplevel = NULL;
1164    window->wl.xdg.surface = NULL;
1165}
1166
1167static GLFWbool createNativeSurface(_GLFWwindow* window,
1168                                    const _GLFWwndconfig* wndconfig,
1169                                    const _GLFWfbconfig* fbconfig)
1170{
1171    window->wl.surface = wl_compositor_create_surface(_glfw.wl.compositor);
1172    if (!window->wl.surface)
1173    {
1174        _glfwInputError(GLFW_PLATFORM_ERROR, "Wayland: Failed to create window surface");
1175        return GLFW_FALSE;
1176    }
1177
1178    wl_proxy_set_tag((struct wl_proxy*) window->wl.surface, &_glfw.wl.tag);
1179    wl_surface_add_listener(window->wl.surface,
1180                            &surfaceListener,
1181                            window);
1182
1183    window->wl.width = wndconfig->width;
1184    window->wl.height = wndconfig->height;
1185    window->wl.fbWidth = wndconfig->width;
1186    window->wl.fbHeight = wndconfig->height;
1187    window->wl.appId = _glfw_strdup(wndconfig->wl.appId);
1188
1189    window->wl.bufferScale = 1;
1190    window->wl.scalingNumerator = 120;
1191    window->wl.scaleFramebuffer = wndconfig->scaleFramebuffer;
1192
1193    window->wl.maximized = wndconfig->maximized;
1194
1195    window->wl.transparent = fbconfig->transparent;
1196    if (!window->wl.transparent)
1197        setContentAreaOpaque(window);
1198
1199    if (_glfw.wl.fractionalScaleManager)
1200    {
1201        if (window->wl.scaleFramebuffer)
1202        {
1203            window->wl.scalingViewport =
1204                wp_viewporter_get_viewport(_glfw.wl.viewporter, window->wl.surface);
1205
1206            wp_viewport_set_destination(window->wl.scalingViewport,
1207                                        window->wl.width,
1208                                        window->wl.height);
1209
1210            window->wl.fractionalScale =
1211                wp_fractional_scale_manager_v1_get_fractional_scale(
1212                    _glfw.wl.fractionalScaleManager,
1213                    window->wl.surface);
1214
1215            wp_fractional_scale_v1_add_listener(window->wl.fractionalScale,
1216                                                &fractionalScaleListener,
1217                                                window);
1218        }
1219    }
1220
1221    return GLFW_TRUE;
1222}
1223
1224static void setCursorImage(_GLFWwindow* window,
1225                           _GLFWcursorWayland* cursorWayland)
1226{
1227    struct itimerspec timer = {0};
1228    struct wl_cursor* wlCursor = cursorWayland->cursor;
1229    struct wl_cursor_image* image;
1230    struct wl_buffer* buffer;
1231    struct wl_surface* surface = _glfw.wl.cursorSurface;
1232    int scale = 1;
1233
1234    if (!wlCursor)
1235        buffer = cursorWayland->buffer;
1236    else
1237    {
1238        if (window->wl.bufferScale > 1 && cursorWayland->cursorHiDPI)
1239        {
1240            wlCursor = cursorWayland->cursorHiDPI;
1241            scale = 2;
1242        }
1243
1244        image = wlCursor->images[cursorWayland->currentImage];
1245        buffer = wl_cursor_image_get_buffer(image);
1246        if (!buffer)
1247            return;
1248
1249        timer.it_value.tv_sec = image->delay / 1000;
1250        timer.it_value.tv_nsec = (image->delay % 1000) * 1000000;
1251        timerfd_settime(_glfw.wl.cursorTimerfd, 0, &timer, NULL);
1252
1253        cursorWayland->width = image->width;
1254        cursorWayland->height = image->height;
1255        cursorWayland->xhot = image->hotspot_x;
1256        cursorWayland->yhot = image->hotspot_y;
1257    }
1258
1259    wl_pointer_set_cursor(_glfw.wl.pointer, _glfw.wl.pointerEnterSerial,
1260                          surface,
1261                          cursorWayland->xhot / scale,
1262                          cursorWayland->yhot / scale);
1263    wl_surface_set_buffer_scale(surface, scale);
1264    wl_surface_attach(surface, buffer, 0, 0);
1265    wl_surface_damage(surface, 0, 0,
1266                      cursorWayland->width, cursorWayland->height);
1267    wl_surface_commit(surface);
1268}
1269
1270static void incrementCursorImage(_GLFWwindow* window)
1271{
1272    _GLFWcursor* cursor;
1273
1274    if (!window || !window->wl.hovered)
1275        return;
1276
1277    cursor = window->wl.currentCursor;
1278    if (cursor && cursor->wl.cursor)
1279    {
1280        cursor->wl.currentImage += 1;
1281        cursor->wl.currentImage %= cursor->wl.cursor->image_count;
1282        setCursorImage(window, &cursor->wl);
1283    }
1284}
1285
1286static GLFWbool flushDisplay(void)
1287{
1288    while (wl_display_flush(_glfw.wl.display) == -1)
1289    {
1290        if (errno != EAGAIN)
1291            return GLFW_FALSE;
1292
1293        struct pollfd fd = { wl_display_get_fd(_glfw.wl.display), POLLOUT };
1294
1295        while (poll(&fd, 1, -1) == -1)
1296        {
1297            if (errno != EINTR && errno != EAGAIN)
1298                return GLFW_FALSE;
1299        }
1300    }
1301
1302    return GLFW_TRUE;
1303}
1304
1305static int translateKey(uint32_t scancode)
1306{
1307    if (scancode < sizeof(_glfw.wl.keycodes) / sizeof(_glfw.wl.keycodes[0]))
1308        return _glfw.wl.keycodes[scancode];
1309
1310    return GLFW_KEY_UNKNOWN;
1311}
1312
1313static xkb_keysym_t composeSymbol(xkb_keysym_t sym)
1314{
1315    if (sym == XKB_KEY_NoSymbol || !_glfw.wl.xkb.composeState)
1316        return sym;
1317    if (xkb_compose_state_feed(_glfw.wl.xkb.composeState, sym)
1318            != XKB_COMPOSE_FEED_ACCEPTED)
1319        return sym;
1320    switch (xkb_compose_state_get_status(_glfw.wl.xkb.composeState))
1321    {
1322        case XKB_COMPOSE_COMPOSED:
1323            return xkb_compose_state_get_one_sym(_glfw.wl.xkb.composeState);
1324        case XKB_COMPOSE_COMPOSING:
1325        case XKB_COMPOSE_CANCELLED:
1326            return XKB_KEY_NoSymbol;
1327        case XKB_COMPOSE_NOTHING:
1328        default:
1329            return sym;
1330    }
1331}
1332
1333static void inputText(_GLFWwindow* window, uint32_t scancode)
1334{
1335    const xkb_keysym_t* keysyms;
1336    const xkb_keycode_t keycode = scancode + 8;
1337
1338    if (xkb_state_key_get_syms(_glfw.wl.xkb.state, keycode, &keysyms) == 1)
1339    {
1340        const xkb_keysym_t keysym = composeSymbol(keysyms[0]);
1341        const uint32_t codepoint = xkb_keysym_to_utf32(keysym);
1342        if (codepoint != 0)
1343        {
1344            const int mods = _glfw.wl.xkb.modifiers;
1345            const int plain = !(mods & (GLFW_MOD_CONTROL | GLFW_MOD_ALT));
1346            _glfwInputChar(window, codepoint, mods, plain);
1347        }
1348    }
1349}
1350
1351static void handleEvents(double* timeout)
1352{
1353#if defined(GLFW_BUILD_LINUX_JOYSTICK)
1354    if (_glfw.joysticksInitialized)
1355        _glfwDetectJoystickConnectionLinux();
1356#endif
1357
1358    GLFWbool event = GLFW_FALSE;
1359    enum { DISPLAY_FD, KEYREPEAT_FD, CURSOR_FD, LIBDECOR_FD };
1360    struct pollfd fds[] =
1361    {
1362        [DISPLAY_FD] = { wl_display_get_fd(_glfw.wl.display), POLLIN },
1363        [KEYREPEAT_FD] = { _glfw.wl.keyRepeatTimerfd, POLLIN },
1364        [CURSOR_FD] = { _glfw.wl.cursorTimerfd, POLLIN },
1365        [LIBDECOR_FD] = { -1, POLLIN }
1366    };
1367
1368    if (_glfw.wl.libdecor.context)
1369        fds[LIBDECOR_FD].fd = libdecor_get_fd(_glfw.wl.libdecor.context);
1370
1371    while (!event)
1372    {
1373        while (wl_display_prepare_read(_glfw.wl.display) != 0)
1374        {
1375            if (wl_display_dispatch_pending(_glfw.wl.display) > 0)
1376                return;
1377        }
1378
1379        // If an error other than EAGAIN happens, we have likely been disconnected
1380        // from the Wayland session; try to handle that the best we can.
1381        if (!flushDisplay())
1382        {
1383            wl_display_cancel_read(_glfw.wl.display);
1384
1385            _GLFWwindow* window = _glfw.windowListHead;
1386            while (window)
1387            {
1388                _glfwInputWindowCloseRequest(window);
1389                window = window->next;
1390            }
1391
1392            return;
1393        }
1394
1395        if (!_glfwPollPOSIX(fds, sizeof(fds) / sizeof(fds[0]), timeout))
1396        {
1397            wl_display_cancel_read(_glfw.wl.display);
1398            return;
1399        }
1400
1401        if (fds[DISPLAY_FD].revents & POLLIN)
1402        {
1403            wl_display_read_events(_glfw.wl.display);
1404            if (wl_display_dispatch_pending(_glfw.wl.display) > 0)
1405                event = GLFW_TRUE;
1406        }
1407        else
1408            wl_display_cancel_read(_glfw.wl.display);
1409
1410        if (fds[KEYREPEAT_FD].revents & POLLIN)
1411        {
1412            uint64_t repeats;
1413
1414            if (read(_glfw.wl.keyRepeatTimerfd, &repeats, sizeof(repeats)) == 8)
1415            {
1416                if (_glfw.wl.keyboardFocus)
1417                {
1418                    for (uint64_t i = 0; i < repeats; i++)
1419                    {
1420                        _glfwInputKey(_glfw.wl.keyboardFocus,
1421                                      translateKey(_glfw.wl.keyRepeatScancode),
1422                                      _glfw.wl.keyRepeatScancode,
1423                                      GLFW_PRESS,
1424                                      _glfw.wl.xkb.modifiers);
1425                        inputText(_glfw.wl.keyboardFocus, _glfw.wl.keyRepeatScancode);
1426                    }
1427
1428                    event = GLFW_TRUE;
1429                }
1430
1431            }
1432        }
1433
1434        if (fds[CURSOR_FD].revents & POLLIN)
1435        {
1436            uint64_t repeats;
1437
1438            if (read(_glfw.wl.cursorTimerfd, &repeats, sizeof(repeats)) == 8)
1439                incrementCursorImage(_glfw.wl.pointerFocus);
1440        }
1441
1442        if (fds[LIBDECOR_FD].revents & POLLIN)
1443        {
1444            if (libdecor_dispatch(_glfw.wl.libdecor.context, 0) > 0)
1445                event = GLFW_TRUE;
1446        }
1447    }
1448}
1449
1450// Reads the specified data offer as the specified MIME type
1451//
1452static char* readDataOfferAsString(struct wl_data_offer* offer, const char* mimeType)
1453{
1454    int fds[2];
1455
1456    if (pipe2(fds, O_CLOEXEC) == -1)
1457    {
1458        _glfwInputError(GLFW_PLATFORM_ERROR,
1459                        "Wayland: Failed to create pipe for data offer: %s",
1460                        strerror(errno));
1461        return NULL;
1462    }
1463
1464    wl_data_offer_receive(offer, mimeType, fds[1]);
1465    flushDisplay();
1466    close(fds[1]);
1467
1468    char* string = NULL;
1469    size_t size = 0;
1470    size_t length = 0;
1471
1472    for (;;)
1473    {
1474        const size_t readSize = 4096;
1475        const size_t requiredSize = length + readSize + 1;
1476        if (requiredSize > size)
1477        {
1478            char* longer = _glfw_realloc(string, requiredSize);
1479            if (!longer)
1480            {
1481                _glfwInputError(GLFW_OUT_OF_MEMORY, NULL);
1482                _glfw_free(string);
1483                close(fds[0]);
1484                return NULL;
1485            }
1486
1487            string = longer;
1488            size = requiredSize;
1489        }
1490
1491        const ssize_t result = read(fds[0], string + length, readSize);
1492        if (result == 0)
1493            break;
1494        else if (result == -1)
1495        {
1496            if (errno == EINTR)
1497                continue;
1498
1499            _glfwInputError(GLFW_PLATFORM_ERROR,
1500                            "Wayland: Failed to read from data offer pipe: %s",
1501                            strerror(errno));
1502            _glfw_free(string);
1503            close(fds[0]);
1504            return NULL;
1505        }
1506
1507        length += result;
1508    }
1509
1510    close(fds[0]);
1511
1512    string[length] = '\0';
1513    return string;
1514}
1515
1516static void pointerHandleEnter(void* userData,
1517                               struct wl_pointer* pointer,
1518                               uint32_t serial,
1519                               struct wl_surface* surface,
1520                               wl_fixed_t sx,
1521                               wl_fixed_t sy)
1522{
1523    // Happens in the case we just destroyed the surface.
1524    if (!surface)
1525        return;
1526
1527    if (wl_proxy_get_tag((struct wl_proxy*) surface) != &_glfw.wl.tag)
1528        return;
1529
1530    _GLFWwindow* window = wl_surface_get_user_data(surface);
1531
1532    _glfw.wl.serial = serial;
1533    _glfw.wl.pointerEnterSerial = serial;
1534    _glfw.wl.pointerFocus = window;
1535
1536    if (surface == window->wl.surface)
1537    {
1538        window->wl.hovered = GLFW_TRUE;
1539        _glfwSetCursorWayland(window, window->wl.currentCursor);
1540        _glfwInputCursorEnter(window, GLFW_TRUE);
1541
1542        if (window->cursorMode != GLFW_CURSOR_DISABLED)
1543        {
1544            window->wl.cursorPosX = wl_fixed_to_double(sx);
1545            window->wl.cursorPosY = wl_fixed_to_double(sy);
1546            _glfwInputCursorPos(window, window->wl.cursorPosX, window->wl.cursorPosY);
1547        }
1548    }
1549    else
1550    {
1551        if (window->wl.fallback.decorations)
1552        {
1553            window->wl.fallback.focus = surface;
1554            updateFallbackDecorationCursor(window, sx, sy);
1555        }
1556    }
1557}
1558
1559static void pointerHandleLeave(void* userData,
1560                               struct wl_pointer* pointer,
1561                               uint32_t serial,
1562                               struct wl_surface* surface)
1563{
1564    if (!surface)
1565        return;
1566
1567    if (wl_proxy_get_tag((struct wl_proxy*) surface) != &_glfw.wl.tag)
1568        return;
1569
1570    _GLFWwindow* window = _glfw.wl.pointerFocus;
1571    if (!window)
1572        return;
1573
1574    _glfw.wl.serial = serial;
1575    _glfw.wl.pointerFocus = NULL;
1576
1577    if (window->wl.hovered)
1578    {
1579        window->wl.hovered = GLFW_FALSE;
1580        _glfwInputCursorEnter(window, GLFW_FALSE);
1581    }
1582    else
1583    {
1584        if (window->wl.fallback.decorations)
1585        {
1586            window->wl.fallback.focus = NULL;
1587            window->wl.fallback.cursorName = NULL;
1588        }
1589    }
1590}
1591
1592static void pointerHandleMotion(void* userData,
1593                                struct wl_pointer* pointer,
1594                                uint32_t time,
1595                                wl_fixed_t sx,
1596                                wl_fixed_t sy)
1597{
1598    _GLFWwindow* window = _glfw.wl.pointerFocus;
1599    if (!window)
1600        return;
1601
1602    if (window->cursorMode == GLFW_CURSOR_DISABLED)
1603        return;
1604
1605    if (window->wl.hovered)
1606    {
1607        window->wl.cursorPosX = wl_fixed_to_double(sx);
1608        window->wl.cursorPosY = wl_fixed_to_double(sy);
1609        _glfwInputCursorPos(window, window->wl.cursorPosX, window->wl.cursorPosY);
1610    }
1611    else
1612    {
1613        if (window->wl.fallback.decorations)
1614            updateFallbackDecorationCursor(window, sx, sy);
1615    }
1616}
1617
1618static void pointerHandleButton(void* userData,
1619                                struct wl_pointer* pointer,
1620                                uint32_t serial,
1621                                uint32_t time,
1622                                uint32_t button,
1623                                uint32_t state)
1624{
1625    _GLFWwindow* window = _glfw.wl.pointerFocus;
1626    if (!window)
1627        return;
1628
1629    if (window->wl.hovered)
1630    {
1631        _glfw.wl.serial = serial;
1632
1633        _glfwInputMouseClick(window,
1634                             button - BTN_LEFT,
1635                             state == WL_POINTER_BUTTON_STATE_PRESSED,
1636                             _glfw.wl.xkb.modifiers);
1637    }
1638    else
1639    {
1640        if (window->wl.fallback.decorations)
1641            handleFallbackDecorationButton(window, serial, button);
1642    }
1643}
1644
1645static void pointerHandleAxis(void* userData,
1646                              struct wl_pointer* pointer,
1647                              uint32_t time,
1648                              uint32_t axis,
1649                              wl_fixed_t value)
1650{
1651    _GLFWwindow* window = _glfw.wl.pointerFocus;
1652    if (!window)
1653        return;
1654
1655    if (window->wl.hovered)
1656    {
1657        // NOTE: 10 units of motion per mouse wheel step seems to be a common ratio
1658        if (axis == WL_POINTER_AXIS_HORIZONTAL_SCROLL)
1659            _glfwInputScroll(window, -wl_fixed_to_double(value) / 10.0, 0.0);
1660        else if (axis == WL_POINTER_AXIS_VERTICAL_SCROLL)
1661            _glfwInputScroll(window, 0.0, -wl_fixed_to_double(value) / 10.0);
1662    }
1663}
1664
1665static const struct wl_pointer_listener pointerListener =
1666{
1667    pointerHandleEnter,
1668    pointerHandleLeave,
1669    pointerHandleMotion,
1670    pointerHandleButton,
1671    pointerHandleAxis,
1672};
1673
1674static void keyboardHandleKeymap(void* userData,
1675                                 struct wl_keyboard* keyboard,
1676                                 uint32_t format,
1677                                 int fd,
1678                                 uint32_t size)
1679{
1680    struct xkb_keymap* keymap;
1681    struct xkb_state* state;
1682    struct xkb_compose_table* composeTable;
1683    struct xkb_compose_state* composeState;
1684
1685    char* mapStr;
1686    const char* locale;
1687
1688    if (format != WL_KEYBOARD_KEYMAP_FORMAT_XKB_V1)
1689    {
1690        close(fd);
1691        return;
1692    }
1693
1694    mapStr = mmap(NULL, size, PROT_READ, MAP_SHARED, fd, 0);
1695    if (mapStr == MAP_FAILED)
1696    {
1697        close(fd);
1698        return;
1699    }
1700
1701    keymap = xkb_keymap_new_from_string(_glfw.wl.xkb.context,
1702                                        mapStr,
1703                                        XKB_KEYMAP_FORMAT_TEXT_V1,
1704                                        0);
1705    munmap(mapStr, size);
1706    close(fd);
1707
1708    if (!keymap)
1709    {
1710        _glfwInputError(GLFW_PLATFORM_ERROR,
1711                        "Wayland: Failed to compile keymap");
1712        return;
1713    }
1714
1715    state = xkb_state_new(keymap);
1716    if (!state)
1717    {
1718        _glfwInputError(GLFW_PLATFORM_ERROR,
1719                        "Wayland: Failed to create XKB state");
1720        xkb_keymap_unref(keymap);
1721        return;
1722    }
1723
1724    // Look up the preferred locale, falling back to "C" as default.
1725    locale = getenv("LC_ALL");
1726    if (!locale)
1727        locale = getenv("LC_CTYPE");
1728    if (!locale)
1729        locale = getenv("LANG");
1730    if (!locale)
1731        locale = "C";
1732
1733    composeTable =
1734        xkb_compose_table_new_from_locale(_glfw.wl.xkb.context, locale,
1735                                          XKB_COMPOSE_COMPILE_NO_FLAGS);
1736    if (composeTable)
1737    {
1738        composeState =
1739            xkb_compose_state_new(composeTable, XKB_COMPOSE_STATE_NO_FLAGS);
1740        xkb_compose_table_unref(composeTable);
1741        if (composeState)
1742            _glfw.wl.xkb.composeState = composeState;
1743        else
1744            _glfwInputError(GLFW_PLATFORM_ERROR,
1745                            "Wayland: Failed to create XKB compose state");
1746    }
1747    else
1748    {
1749        _glfwInputError(GLFW_PLATFORM_ERROR,
1750                        "Wayland: Failed to create XKB compose table");
1751    }
1752
1753    xkb_keymap_unref(_glfw.wl.xkb.keymap);
1754    xkb_state_unref(_glfw.wl.xkb.state);
1755    _glfw.wl.xkb.keymap = keymap;
1756    _glfw.wl.xkb.state = state;
1757
1758    _glfw.wl.xkb.controlIndex  = xkb_keymap_mod_get_index(_glfw.wl.xkb.keymap, "Control");
1759    _glfw.wl.xkb.altIndex      = xkb_keymap_mod_get_index(_glfw.wl.xkb.keymap, "Mod1");
1760    _glfw.wl.xkb.shiftIndex    = xkb_keymap_mod_get_index(_glfw.wl.xkb.keymap, "Shift");
1761    _glfw.wl.xkb.superIndex    = xkb_keymap_mod_get_index(_glfw.wl.xkb.keymap, "Mod4");
1762    _glfw.wl.xkb.capsLockIndex = xkb_keymap_mod_get_index(_glfw.wl.xkb.keymap, "Lock");
1763    _glfw.wl.xkb.numLockIndex  = xkb_keymap_mod_get_index(_glfw.wl.xkb.keymap, "Mod2");
1764}
1765
1766static void keyboardHandleEnter(void* userData,
1767                                struct wl_keyboard* keyboard,
1768                                uint32_t serial,
1769                                struct wl_surface* surface,
1770                                struct wl_array* keys)
1771{
1772    // Happens in the case we just destroyed the surface.
1773    if (!surface)
1774        return;
1775
1776    if (wl_proxy_get_tag((struct wl_proxy*) surface) != &_glfw.wl.tag)
1777        return;
1778
1779    _GLFWwindow* window = wl_surface_get_user_data(surface);
1780    if (surface != window->wl.surface)
1781        return;
1782
1783    _glfw.wl.serial = serial;
1784    _glfw.wl.keyboardFocus = window;
1785    _glfwInputWindowFocus(window, GLFW_TRUE);
1786}
1787
1788static void keyboardHandleLeave(void* userData,
1789                                struct wl_keyboard* keyboard,
1790                                uint32_t serial,
1791                                struct wl_surface* surface)
1792{
1793    _GLFWwindow* window = _glfw.wl.keyboardFocus;
1794
1795    if (!window)
1796        return;
1797
1798    struct itimerspec timer = {0};
1799    timerfd_settime(_glfw.wl.keyRepeatTimerfd, 0, &timer, NULL);
1800
1801    _glfw.wl.serial = serial;
1802    _glfw.wl.keyboardFocus = NULL;
1803    _glfwInputWindowFocus(window, GLFW_FALSE);
1804}
1805
1806static void keyboardHandleKey(void* userData,
1807                              struct wl_keyboard* keyboard,
1808                              uint32_t serial,
1809                              uint32_t time,
1810                              uint32_t scancode,
1811                              uint32_t state)
1812{
1813    _GLFWwindow* window = _glfw.wl.keyboardFocus;
1814    if (!window)
1815        return;
1816
1817    const int key = translateKey(scancode);
1818    const int action =
1819        state == WL_KEYBOARD_KEY_STATE_PRESSED ? GLFW_PRESS : GLFW_RELEASE;
1820
1821    _glfw.wl.serial = serial;
1822
1823    struct itimerspec timer = {0};
1824
1825    if (action == GLFW_PRESS)
1826    {
1827        const xkb_keycode_t keycode = scancode + 8;
1828
1829        if (xkb_keymap_key_repeats(_glfw.wl.xkb.keymap, keycode) &&
1830            _glfw.wl.keyRepeatRate > 0)
1831        {
1832            _glfw.wl.keyRepeatScancode = scancode;
1833            if (_glfw.wl.keyRepeatRate > 1)
1834                timer.it_interval.tv_nsec = 1000000000 / _glfw.wl.keyRepeatRate;
1835            else
1836                timer.it_interval.tv_sec = 1;
1837
1838            timer.it_value.tv_sec = _glfw.wl.keyRepeatDelay / 1000;
1839            timer.it_value.tv_nsec = (_glfw.wl.keyRepeatDelay % 1000) * 1000000;
1840            timerfd_settime(_glfw.wl.keyRepeatTimerfd, 0, &timer, NULL);
1841        }
1842    }
1843    else if (scancode == _glfw.wl.keyRepeatScancode)
1844    {
1845        timerfd_settime(_glfw.wl.keyRepeatTimerfd, 0, &timer, NULL);
1846    }
1847
1848    _glfwInputKey(window, key, scancode, action, _glfw.wl.xkb.modifiers);
1849
1850    if (action == GLFW_PRESS)
1851        inputText(window, scancode);
1852}
1853
1854static void keyboardHandleModifiers(void* userData,
1855                                    struct wl_keyboard* keyboard,
1856                                    uint32_t serial,
1857                                    uint32_t modsDepressed,
1858                                    uint32_t modsLatched,
1859                                    uint32_t modsLocked,
1860                                    uint32_t group)
1861{
1862    _glfw.wl.serial = serial;
1863
1864    if (!_glfw.wl.xkb.keymap)
1865        return;
1866
1867    xkb_state_update_mask(_glfw.wl.xkb.state,
1868                          modsDepressed,
1869                          modsLatched,
1870                          modsLocked,
1871                          0,
1872                          0,
1873                          group);
1874
1875    _glfw.wl.xkb.modifiers = 0;
1876
1877    struct
1878    {
1879        xkb_mod_index_t index;
1880        unsigned int bit;
1881    } modifiers[] =
1882    {
1883        { _glfw.wl.xkb.controlIndex,  GLFW_MOD_CONTROL },
1884        { _glfw.wl.xkb.altIndex,      GLFW_MOD_ALT },
1885        { _glfw.wl.xkb.shiftIndex,    GLFW_MOD_SHIFT },
1886        { _glfw.wl.xkb.superIndex,    GLFW_MOD_SUPER },
1887        { _glfw.wl.xkb.capsLockIndex, GLFW_MOD_CAPS_LOCK },
1888        { _glfw.wl.xkb.numLockIndex,  GLFW_MOD_NUM_LOCK }
1889    };
1890
1891    for (size_t i = 0; i < sizeof(modifiers) / sizeof(modifiers[0]); i++)
1892    {
1893        if (xkb_state_mod_index_is_active(_glfw.wl.xkb.state,
1894                                          modifiers[i].index,
1895                                          XKB_STATE_MODS_EFFECTIVE) == 1)
1896        {
1897            _glfw.wl.xkb.modifiers |= modifiers[i].bit;
1898        }
1899    }
1900}
1901
1902static void keyboardHandleRepeatInfo(void* userData,
1903                                     struct wl_keyboard* keyboard,
1904                                     int32_t rate,
1905                                     int32_t delay)
1906{
1907    if (keyboard != _glfw.wl.keyboard)
1908        return;
1909
1910    _glfw.wl.keyRepeatRate = rate;
1911    _glfw.wl.keyRepeatDelay = delay;
1912}
1913
1914static const struct wl_keyboard_listener keyboardListener =
1915{
1916    keyboardHandleKeymap,
1917    keyboardHandleEnter,
1918    keyboardHandleLeave,
1919    keyboardHandleKey,
1920    keyboardHandleModifiers,
1921    keyboardHandleRepeatInfo,
1922};
1923
1924static void seatHandleCapabilities(void* userData,
1925                                   struct wl_seat* seat,
1926                                   enum wl_seat_capability caps)
1927{
1928    if ((caps & WL_SEAT_CAPABILITY_POINTER) && !_glfw.wl.pointer)
1929    {
1930        _glfw.wl.pointer = wl_seat_get_pointer(seat);
1931        wl_pointer_add_listener(_glfw.wl.pointer, &pointerListener, NULL);
1932    }
1933    else if (!(caps & WL_SEAT_CAPABILITY_POINTER) && _glfw.wl.pointer)
1934    {
1935        wl_pointer_destroy(_glfw.wl.pointer);
1936        _glfw.wl.pointer = NULL;
1937    }
1938
1939    if ((caps & WL_SEAT_CAPABILITY_KEYBOARD) && !_glfw.wl.keyboard)
1940    {
1941        _glfw.wl.keyboard = wl_seat_get_keyboard(seat);
1942        wl_keyboard_add_listener(_glfw.wl.keyboard, &keyboardListener, NULL);
1943    }
1944    else if (!(caps & WL_SEAT_CAPABILITY_KEYBOARD) && _glfw.wl.keyboard)
1945    {
1946        wl_keyboard_destroy(_glfw.wl.keyboard);
1947        _glfw.wl.keyboard = NULL;
1948    }
1949}
1950
1951static void seatHandleName(void* userData,
1952                           struct wl_seat* seat,
1953                           const char* name)
1954{
1955}
1956
1957static const struct wl_seat_listener seatListener =
1958{
1959    seatHandleCapabilities,
1960    seatHandleName,
1961};
1962
1963static void dataOfferHandleOffer(void* userData,
1964                                 struct wl_data_offer* offer,
1965                                 const char* mimeType)
1966{
1967    for (unsigned int i = 0; i < _glfw.wl.offerCount; i++)
1968    {
1969        if (_glfw.wl.offers[i].offer == offer)
1970        {
1971            if (strcmp(mimeType, "text/plain;charset=utf-8") == 0)
1972                _glfw.wl.offers[i].text_plain_utf8 = GLFW_TRUE;
1973            else if (strcmp(mimeType, "text/uri-list") == 0)
1974                _glfw.wl.offers[i].text_uri_list = GLFW_TRUE;
1975
1976            break;
1977        }
1978    }
1979}
1980
1981static const struct wl_data_offer_listener dataOfferListener =
1982{
1983    dataOfferHandleOffer
1984};
1985
1986static void dataDeviceHandleDataOffer(void* userData,
1987                                      struct wl_data_device* device,
1988                                      struct wl_data_offer* offer)
1989{
1990    _GLFWofferWayland* offers =
1991        _glfw_realloc(_glfw.wl.offers,
1992                      sizeof(_GLFWofferWayland) * (_glfw.wl.offerCount + 1));
1993    if (!offers)
1994    {
1995        _glfwInputError(GLFW_OUT_OF_MEMORY, NULL);
1996        return;
1997    }
1998
1999    _glfw.wl.offers = offers;
2000    _glfw.wl.offerCount++;
2001
2002    _glfw.wl.offers[_glfw.wl.offerCount - 1] = (_GLFWofferWayland) { offer };
2003    wl_data_offer_add_listener(offer, &dataOfferListener, NULL);
2004}
2005
2006static void dataDeviceHandleEnter(void* userData,
2007                                  struct wl_data_device* device,
2008                                  uint32_t serial,
2009                                  struct wl_surface* surface,
2010                                  wl_fixed_t x,
2011                                  wl_fixed_t y,
2012                                  struct wl_data_offer* offer)
2013{
2014    if (_glfw.wl.dragOffer)
2015    {
2016        wl_data_offer_destroy(_glfw.wl.dragOffer);
2017        _glfw.wl.dragOffer = NULL;
2018        _glfw.wl.dragFocus = NULL;
2019    }
2020
2021    unsigned int i;
2022
2023    for (i = 0; i < _glfw.wl.offerCount; i++)
2024    {
2025        if (_glfw.wl.offers[i].offer == offer)
2026            break;
2027    }
2028
2029    if (i == _glfw.wl.offerCount)
2030        return;
2031
2032    if (surface && wl_proxy_get_tag((struct wl_proxy*) surface) == &_glfw.wl.tag)
2033    {
2034        _GLFWwindow* window = wl_surface_get_user_data(surface);
2035        if (window->wl.surface == surface)
2036        {
2037            if (_glfw.wl.offers[i].text_uri_list)
2038            {
2039                _glfw.wl.dragOffer = offer;
2040                _glfw.wl.dragFocus = window;
2041                _glfw.wl.dragSerial = serial;
2042
2043                wl_data_offer_accept(offer, serial, "text/uri-list");
2044            }
2045        }
2046    }
2047
2048    if (!_glfw.wl.dragOffer)
2049    {
2050        wl_data_offer_accept(offer, serial, NULL);
2051        wl_data_offer_destroy(offer);
2052    }
2053
2054    _glfw.wl.offers[i] = _glfw.wl.offers[_glfw.wl.offerCount - 1];
2055    _glfw.wl.offerCount--;
2056}
2057
2058static void dataDeviceHandleLeave(void* userData,
2059                                  struct wl_data_device* device)
2060{
2061    if (_glfw.wl.dragOffer)
2062    {
2063        wl_data_offer_destroy(_glfw.wl.dragOffer);
2064        _glfw.wl.dragOffer = NULL;
2065        _glfw.wl.dragFocus = NULL;
2066    }
2067}
2068
2069static void dataDeviceHandleMotion(void* userData,
2070                                   struct wl_data_device* device,
2071                                   uint32_t time,
2072                                   wl_fixed_t x,
2073                                   wl_fixed_t y)
2074{
2075}
2076
2077static void dataDeviceHandleDrop(void* userData,
2078                                 struct wl_data_device* device)
2079{
2080    if (!_glfw.wl.dragOffer)
2081        return;
2082
2083    char* string = readDataOfferAsString(_glfw.wl.dragOffer, "text/uri-list");
2084    if (string)
2085    {
2086        int count;
2087        char** paths = _glfwParseUriList(string, &count);
2088        if (paths)
2089        {
2090            _glfwInputDrop(_glfw.wl.dragFocus, count, (const char**) paths);
2091
2092            for (int i = 0; i < count; i++)
2093                _glfw_free(paths[i]);
2094
2095            _glfw_free(paths);
2096        }
2097
2098        _glfw_free(string);
2099    }
2100}
2101
2102static void dataDeviceHandleSelection(void* userData,
2103                                      struct wl_data_device* device,
2104                                      struct wl_data_offer* offer)
2105{
2106    if (_glfw.wl.selectionOffer)
2107    {
2108        wl_data_offer_destroy(_glfw.wl.selectionOffer);
2109        _glfw.wl.selectionOffer = NULL;
2110    }
2111
2112    for (unsigned int i = 0; i < _glfw.wl.offerCount; i++)
2113    {
2114        if (_glfw.wl.offers[i].offer == offer)
2115        {
2116            if (_glfw.wl.offers[i].text_plain_utf8)
2117                _glfw.wl.selectionOffer = offer;
2118            else
2119                wl_data_offer_destroy(offer);
2120
2121            _glfw.wl.offers[i] = _glfw.wl.offers[_glfw.wl.offerCount - 1];
2122            _glfw.wl.offerCount--;
2123            break;
2124        }
2125    }
2126}
2127
2128const struct wl_data_device_listener dataDeviceListener =
2129{
2130    dataDeviceHandleDataOffer,
2131    dataDeviceHandleEnter,
2132    dataDeviceHandleLeave,
2133    dataDeviceHandleMotion,
2134    dataDeviceHandleDrop,
2135    dataDeviceHandleSelection,
2136};
2137
2138static void xdgActivationHandleDone(void* userData,
2139                                    struct xdg_activation_token_v1* activationToken,
2140                                    const char* token)
2141{
2142    _GLFWwindow* window = userData;
2143
2144    if (activationToken != window->wl.activationToken)
2145        return;
2146
2147    xdg_activation_v1_activate(_glfw.wl.activationManager, token, window->wl.surface);
2148    xdg_activation_token_v1_destroy(window->wl.activationToken);
2149    window->wl.activationToken = NULL;
2150}
2151
2152static const struct xdg_activation_token_v1_listener xdgActivationListener =
2153{
2154    xdgActivationHandleDone
2155};
2156
2157void _glfwAddSeatListenerWayland(struct wl_seat* seat)
2158{
2159    wl_seat_add_listener(seat, &seatListener, NULL);
2160}
2161
2162void _glfwAddDataDeviceListenerWayland(struct wl_data_device* device)
2163{
2164    wl_data_device_add_listener(device, &dataDeviceListener, NULL);
2165}
2166
2167
2168//////////////////////////////////////////////////////////////////////////
2169//////                       GLFW platform API                      //////
2170//////////////////////////////////////////////////////////////////////////
2171
2172GLFWbool _glfwCreateWindowWayland(_GLFWwindow* window,
2173                                  const _GLFWwndconfig* wndconfig,
2174                                  const _GLFWctxconfig* ctxconfig,
2175                                  const _GLFWfbconfig* fbconfig)
2176{
2177    if (!createNativeSurface(window, wndconfig, fbconfig))
2178        return GLFW_FALSE;
2179
2180    if (ctxconfig->client != GLFW_NO_API)
2181    {
2182        if (ctxconfig->source == GLFW_EGL_CONTEXT_API ||
2183            ctxconfig->source == GLFW_NATIVE_CONTEXT_API)
2184        {
2185            window->wl.egl.window = wl_egl_window_create(window->wl.surface,
2186                                                         window->wl.fbWidth,
2187                                                         window->wl.fbHeight);
2188            if (!window->wl.egl.window)
2189            {
2190                _glfwInputError(GLFW_PLATFORM_ERROR,
2191                                "Wayland: Failed to create EGL window");
2192                return GLFW_FALSE;
2193            }
2194
2195            if (!_glfwInitEGL())
2196                return GLFW_FALSE;
2197            if (!_glfwCreateContextEGL(window, ctxconfig, fbconfig))
2198                return GLFW_FALSE;
2199        }
2200        else if (ctxconfig->source == GLFW_OSMESA_CONTEXT_API)
2201        {
2202            if (!_glfwInitOSMesa())
2203                return GLFW_FALSE;
2204            if (!_glfwCreateContextOSMesa(window, ctxconfig, fbconfig))
2205                return GLFW_FALSE;
2206        }
2207
2208        if (!_glfwRefreshContextAttribs(window, ctxconfig))
2209            return GLFW_FALSE;
2210    }
2211
2212    if (wndconfig->mousePassthrough)
2213        _glfwSetWindowMousePassthroughWayland(window, GLFW_TRUE);
2214
2215    if (window->monitor || wndconfig->visible)
2216    {
2217        if (!createShellObjects(window))
2218            return GLFW_FALSE;
2219    }
2220
2221    return GLFW_TRUE;
2222}
2223
2224void _glfwDestroyWindowWayland(_GLFWwindow* window)
2225{
2226    if (window == _glfw.wl.pointerFocus)
2227        _glfw.wl.pointerFocus = NULL;
2228
2229    if (window == _glfw.wl.keyboardFocus)
2230    {
2231        struct itimerspec timer = {0};
2232        timerfd_settime(_glfw.wl.keyRepeatTimerfd, 0, &timer, NULL);
2233
2234        _glfw.wl.keyboardFocus = NULL;
2235    }
2236
2237    if (window->wl.fractionalScale)
2238        wp_fractional_scale_v1_destroy(window->wl.fractionalScale);
2239
2240    if (window->wl.scalingViewport)
2241        wp_viewport_destroy(window->wl.scalingViewport);
2242
2243    if (window->wl.activationToken)
2244        xdg_activation_token_v1_destroy(window->wl.activationToken);
2245
2246    if (window->wl.idleInhibitor)
2247        zwp_idle_inhibitor_v1_destroy(window->wl.idleInhibitor);
2248
2249    if (window->wl.relativePointer)
2250        zwp_relative_pointer_v1_destroy(window->wl.relativePointer);
2251
2252    if (window->wl.lockedPointer)
2253        zwp_locked_pointer_v1_destroy(window->wl.lockedPointer);
2254
2255    if (window->wl.confinedPointer)
2256        zwp_confined_pointer_v1_destroy(window->wl.confinedPointer);
2257
2258    if (window->context.destroy)
2259        window->context.destroy(window);
2260
2261    destroyShellObjects(window);
2262
2263    if (window->wl.fallback.buffer)
2264        wl_buffer_destroy(window->wl.fallback.buffer);
2265
2266    if (window->wl.egl.window)
2267        wl_egl_window_destroy(window->wl.egl.window);
2268
2269    if (window->wl.surface)
2270        wl_surface_destroy(window->wl.surface);
2271
2272    _glfw_free(window->wl.appId);
2273    _glfw_free(window->wl.outputScales);
2274}
2275
2276void _glfwSetWindowTitleWayland(_GLFWwindow* window, const char* title)
2277{
2278    if (window->wl.libdecor.frame)
2279        libdecor_frame_set_title(window->wl.libdecor.frame, title);
2280    else if (window->wl.xdg.toplevel)
2281        xdg_toplevel_set_title(window->wl.xdg.toplevel, title);
2282}
2283
2284void _glfwSetWindowIconWayland(_GLFWwindow* window,
2285                               int count, const GLFWimage* images)
2286{
2287    _glfwInputError(GLFW_FEATURE_UNAVAILABLE,
2288                    "Wayland: The platform does not support setting the window icon");
2289}
2290
2291void _glfwGetWindowPosWayland(_GLFWwindow* window, int* xpos, int* ypos)
2292{
2293    // A Wayland client is not aware of its position, so just warn and leave it
2294    // as (0, 0)
2295
2296    _glfwInputError(GLFW_FEATURE_UNAVAILABLE,
2297                    "Wayland: The platform does not provide the window position");
2298}
2299
2300void _glfwSetWindowPosWayland(_GLFWwindow* window, int xpos, int ypos)
2301{
2302    // A Wayland client can not set its position, so just warn
2303
2304    _glfwInputError(GLFW_FEATURE_UNAVAILABLE,
2305                    "Wayland: The platform does not support setting the window position");
2306}
2307
2308void _glfwGetWindowSizeWayland(_GLFWwindow* window, int* width, int* height)
2309{
2310    if (width)
2311        *width = window->wl.width;
2312    if (height)
2313        *height = window->wl.height;
2314}
2315
2316void _glfwSetWindowSizeWayland(_GLFWwindow* window, int width, int height)
2317{
2318    if (window->monitor)
2319    {
2320        // Video mode setting is not available on Wayland
2321    }
2322    else
2323    {
2324        if (!resizeWindow(window, width, height))
2325            return;
2326
2327        if (window->wl.libdecor.frame)
2328        {
2329            struct libdecor_state* frameState =
2330                libdecor_state_new(window->wl.width, window->wl.height);
2331            libdecor_frame_commit(window->wl.libdecor.frame, frameState, NULL);
2332            libdecor_state_free(frameState);
2333        }
2334
2335        if (window->wl.visible)
2336            _glfwInputWindowDamage(window);
2337    }
2338}
2339
2340void _glfwSetWindowSizeLimitsWayland(_GLFWwindow* window,
2341                                     int minwidth, int minheight,
2342                                     int maxwidth, int maxheight)
2343{
2344    if (window->wl.libdecor.frame)
2345    {
2346        if (minwidth == GLFW_DONT_CARE || minheight == GLFW_DONT_CARE)
2347            minwidth = minheight = 0;
2348
2349        if (maxwidth == GLFW_DONT_CARE || maxheight == GLFW_DONT_CARE)
2350            maxwidth = maxheight = 0;
2351
2352        libdecor_frame_set_min_content_size(window->wl.libdecor.frame,
2353                                            minwidth, minheight);
2354        libdecor_frame_set_max_content_size(window->wl.libdecor.frame,
2355                                            maxwidth, maxheight);
2356    }
2357    else if (window->wl.xdg.toplevel)
2358        updateXdgSizeLimits(window);
2359}
2360
2361void _glfwSetWindowAspectRatioWayland(_GLFWwindow* window, int numer, int denom)
2362{
2363    if (window->wl.maximized || window->wl.fullscreen)
2364        return;
2365
2366    int width = window->wl.width, height = window->wl.height;
2367
2368    if (numer != GLFW_DONT_CARE && denom != GLFW_DONT_CARE)
2369    {
2370        const float aspectRatio = (float) width / (float) height;
2371        const float targetRatio = (float) numer / (float) denom;
2372        if (aspectRatio < targetRatio)
2373            height /= targetRatio;
2374        else if (aspectRatio > targetRatio)
2375            width *= targetRatio;
2376    }
2377
2378    if (resizeWindow(window, width, height))
2379    {
2380        if (window->wl.libdecor.frame)
2381        {
2382            struct libdecor_state* frameState =
2383                libdecor_state_new(window->wl.width, window->wl.height);
2384            libdecor_frame_commit(window->wl.libdecor.frame, frameState, NULL);
2385            libdecor_state_free(frameState);
2386        }
2387
2388        _glfwInputWindowSize(window, window->wl.width, window->wl.height);
2389
2390        if (window->wl.visible)
2391            _glfwInputWindowDamage(window);
2392    }
2393}
2394
2395void _glfwGetFramebufferSizeWayland(_GLFWwindow* window, int* width, int* height)
2396{
2397    if (width)
2398        *width = window->wl.fbWidth;
2399    if (height)
2400        *height = window->wl.fbHeight;
2401}
2402
2403void _glfwGetWindowFrameSizeWayland(_GLFWwindow* window,
2404                                    int* left, int* top,
2405                                    int* right, int* bottom)
2406{
2407    if (window->wl.fallback.decorations)
2408    {
2409        if (top)
2410            *top = GLFW_CAPTION_HEIGHT;
2411        if (left)
2412            *left = GLFW_BORDER_SIZE;
2413        if (right)
2414            *right = GLFW_BORDER_SIZE;
2415        if (bottom)
2416            *bottom = GLFW_BORDER_SIZE;
2417    }
2418}
2419
2420void _glfwGetWindowContentScaleWayland(_GLFWwindow* window,
2421                                       float* xscale, float* yscale)
2422{
2423    if (window->wl.fractionalScale)
2424    {
2425        if (xscale)
2426            *xscale = (float) window->wl.scalingNumerator / 120.f;
2427        if (yscale)
2428            *yscale = (float) window->wl.scalingNumerator / 120.f;
2429    }
2430    else
2431    {
2432        if (xscale)
2433            *xscale = (float) window->wl.bufferScale;
2434        if (yscale)
2435            *yscale = (float) window->wl.bufferScale;
2436    }
2437}
2438
2439void _glfwIconifyWindowWayland(_GLFWwindow* window)
2440{
2441    if (window->wl.libdecor.frame)
2442        libdecor_frame_set_minimized(window->wl.libdecor.frame);
2443    else if (window->wl.xdg.toplevel)
2444        xdg_toplevel_set_minimized(window->wl.xdg.toplevel);
2445}
2446
2447void _glfwRestoreWindowWayland(_GLFWwindow* window)
2448{
2449    if (window->monitor)
2450    {
2451        // There is no way to unset minimized, or even to know if we are
2452        // minimized, so there is nothing to do in this case.
2453    }
2454    else
2455    {
2456        // We assume we are not minimized and act only on maximization
2457
2458        if (window->wl.maximized)
2459        {
2460            if (window->wl.libdecor.frame)
2461                libdecor_frame_unset_maximized(window->wl.libdecor.frame);
2462            else if (window->wl.xdg.toplevel)
2463                xdg_toplevel_unset_maximized(window->wl.xdg.toplevel);
2464            else
2465                window->wl.maximized = GLFW_FALSE;
2466        }
2467    }
2468}
2469
2470void _glfwMaximizeWindowWayland(_GLFWwindow* window)
2471{
2472    if (window->wl.libdecor.frame)
2473        libdecor_frame_set_maximized(window->wl.libdecor.frame);
2474    else if (window->wl.xdg.toplevel)
2475        xdg_toplevel_set_maximized(window->wl.xdg.toplevel);
2476    else
2477        window->wl.maximized = GLFW_TRUE;
2478}
2479
2480void _glfwShowWindowWayland(_GLFWwindow* window)
2481{
2482    if (!window->wl.libdecor.frame && !window->wl.xdg.toplevel)
2483    {
2484        // NOTE: The XDG surface and role are created here so command-line applications
2485        //       with off-screen windows do not appear in for example the Unity dock
2486        createShellObjects(window);
2487    }
2488}
2489
2490void _glfwHideWindowWayland(_GLFWwindow* window)
2491{
2492    if (window->wl.visible)
2493    {
2494        window->wl.visible = GLFW_FALSE;
2495        destroyShellObjects(window);
2496
2497        wl_surface_attach(window->wl.surface, NULL, 0, 0);
2498        wl_surface_commit(window->wl.surface);
2499    }
2500}
2501
2502void _glfwRequestWindowAttentionWayland(_GLFWwindow* window)
2503{
2504    if (!_glfw.wl.activationManager)
2505        return;
2506
2507    // We're about to overwrite this with a new request
2508    if (window->wl.activationToken)
2509        xdg_activation_token_v1_destroy(window->wl.activationToken);
2510
2511    window->wl.activationToken =
2512        xdg_activation_v1_get_activation_token(_glfw.wl.activationManager);
2513    xdg_activation_token_v1_add_listener(window->wl.activationToken,
2514                                         &xdgActivationListener,
2515                                         window);
2516
2517    xdg_activation_token_v1_commit(window->wl.activationToken);
2518}
2519
2520void _glfwFocusWindowWayland(_GLFWwindow* window)
2521{
2522    if (!_glfw.wl.activationManager)
2523        return;
2524
2525    if (window->wl.activationToken)
2526        xdg_activation_token_v1_destroy(window->wl.activationToken);
2527
2528    window->wl.activationToken =
2529        xdg_activation_v1_get_activation_token(_glfw.wl.activationManager);
2530    xdg_activation_token_v1_add_listener(window->wl.activationToken,
2531                                         &xdgActivationListener,
2532                                         window);
2533
2534    xdg_activation_token_v1_set_serial(window->wl.activationToken,
2535                                       _glfw.wl.serial,
2536                                       _glfw.wl.seat);
2537
2538    _GLFWwindow* requester = _glfw.wl.keyboardFocus;
2539    if (requester)
2540    {
2541        xdg_activation_token_v1_set_surface(window->wl.activationToken,
2542                                            requester->wl.surface);
2543
2544        if (requester->wl.appId)
2545        {
2546            xdg_activation_token_v1_set_app_id(window->wl.activationToken,
2547                                               requester->wl.appId);
2548        }
2549    }
2550
2551    xdg_activation_token_v1_commit(window->wl.activationToken);
2552}
2553
2554void _glfwSetWindowMonitorWayland(_GLFWwindow* window,
2555                                  _GLFWmonitor* monitor,
2556                                  int xpos, int ypos,
2557                                  int width, int height,
2558                                  int refreshRate)
2559{
2560    if (window->monitor == monitor)
2561    {
2562        if (!monitor)
2563            _glfwSetWindowSizeWayland(window, width, height);
2564
2565        return;
2566    }
2567
2568    if (window->monitor)
2569        releaseMonitor(window);
2570
2571    _glfwInputWindowMonitor(window, monitor);
2572
2573    if (window->monitor)
2574        acquireMonitor(window);
2575    else
2576        _glfwSetWindowSizeWayland(window, width, height);
2577}
2578
2579GLFWbool _glfwWindowFocusedWayland(_GLFWwindow* window)
2580{
2581    return _glfw.wl.keyboardFocus == window;
2582}
2583
2584GLFWbool _glfwWindowIconifiedWayland(_GLFWwindow* window)
2585{
2586    // xdg-shell doesn’t give any way to request whether a surface is
2587    // iconified.
2588    return GLFW_FALSE;
2589}
2590
2591GLFWbool _glfwWindowVisibleWayland(_GLFWwindow* window)
2592{
2593    return window->wl.visible;
2594}
2595
2596GLFWbool _glfwWindowMaximizedWayland(_GLFWwindow* window)
2597{
2598    return window->wl.maximized;
2599}
2600
2601GLFWbool _glfwWindowHoveredWayland(_GLFWwindow* window)
2602{
2603    return window->wl.hovered;
2604}
2605
2606GLFWbool _glfwFramebufferTransparentWayland(_GLFWwindow* window)
2607{
2608    return window->wl.transparent;
2609}
2610
2611void _glfwSetWindowResizableWayland(_GLFWwindow* window, GLFWbool enabled)
2612{
2613    if (window->wl.libdecor.frame)
2614    {
2615        if (enabled)
2616        {
2617            libdecor_frame_set_capabilities(window->wl.libdecor.frame,
2618                                            LIBDECOR_ACTION_RESIZE);
2619        }
2620        else
2621        {
2622            libdecor_frame_unset_capabilities(window->wl.libdecor.frame,
2623                                              LIBDECOR_ACTION_RESIZE);
2624        }
2625    }
2626    else if (window->wl.xdg.toplevel)
2627        updateXdgSizeLimits(window);
2628}
2629
2630void _glfwSetWindowDecoratedWayland(_GLFWwindow* window, GLFWbool enabled)
2631{
2632    if (window->wl.libdecor.frame)
2633    {
2634        libdecor_frame_set_visibility(window->wl.libdecor.frame, enabled);
2635    }
2636    else if (window->wl.xdg.decoration)
2637    {
2638        uint32_t mode;
2639
2640        if (enabled)
2641            mode = ZXDG_TOPLEVEL_DECORATION_V1_MODE_SERVER_SIDE;
2642        else
2643            mode = ZXDG_TOPLEVEL_DECORATION_V1_MODE_CLIENT_SIDE;
2644
2645        zxdg_toplevel_decoration_v1_set_mode(window->wl.xdg.decoration, mode);
2646    }
2647    else if (window->wl.xdg.toplevel)
2648    {
2649        if (enabled)
2650            createFallbackDecorations(window);
2651        else
2652            destroyFallbackDecorations(window);
2653    }
2654}
2655
2656void _glfwSetWindowFloatingWayland(_GLFWwindow* window, GLFWbool enabled)
2657{
2658    _glfwInputError(GLFW_FEATURE_UNAVAILABLE,
2659                    "Wayland: Platform does not support making a window floating");
2660}
2661
2662void _glfwSetWindowMousePassthroughWayland(_GLFWwindow* window, GLFWbool enabled)
2663{
2664    if (enabled)
2665    {
2666        struct wl_region* region = wl_compositor_create_region(_glfw.wl.compositor);
2667        wl_surface_set_input_region(window->wl.surface, region);
2668        wl_region_destroy(region);
2669    }
2670    else
2671        wl_surface_set_input_region(window->wl.surface, NULL);
2672}
2673
2674float _glfwGetWindowOpacityWayland(_GLFWwindow* window)
2675{
2676    return 1.f;
2677}
2678
2679void _glfwSetWindowOpacityWayland(_GLFWwindow* window, float opacity)
2680{
2681    _glfwInputError(GLFW_FEATURE_UNAVAILABLE,
2682                    "Wayland: The platform does not support setting the window opacity");
2683}
2684
2685void _glfwSetRawMouseMotionWayland(_GLFWwindow* window, GLFWbool enabled)
2686{
2687    // This is handled in relativePointerHandleRelativeMotion
2688}
2689
2690GLFWbool _glfwRawMouseMotionSupportedWayland(void)
2691{
2692    return GLFW_TRUE;
2693}
2694
2695void _glfwPollEventsWayland(void)
2696{
2697    double timeout = 0.0;
2698    handleEvents(&timeout);
2699}
2700
2701void _glfwWaitEventsWayland(void)
2702{
2703    handleEvents(NULL);
2704}
2705
2706void _glfwWaitEventsTimeoutWayland(double timeout)
2707{
2708    handleEvents(&timeout);
2709}
2710
2711void _glfwPostEmptyEventWayland(void)
2712{
2713    wl_display_sync(_glfw.wl.display);
2714    flushDisplay();
2715}
2716
2717void _glfwGetCursorPosWayland(_GLFWwindow* window, double* xpos, double* ypos)
2718{
2719    if (xpos)
2720        *xpos = window->wl.cursorPosX;
2721    if (ypos)
2722        *ypos = window->wl.cursorPosY;
2723}
2724
2725void _glfwSetCursorPosWayland(_GLFWwindow* window, double x, double y)
2726{
2727    _glfwInputError(GLFW_FEATURE_UNAVAILABLE,
2728                    "Wayland: The platform does not support setting the cursor position");
2729}
2730
2731void _glfwSetCursorModeWayland(_GLFWwindow* window, int mode)
2732{
2733    _glfwSetCursorWayland(window, window->wl.currentCursor);
2734}
2735
2736const char* _glfwGetScancodeNameWayland(int scancode)
2737{
2738    if (scancode < 0 || scancode > 255)
2739    {
2740        _glfwInputError(GLFW_INVALID_VALUE,
2741                        "Wayland: Invalid scancode %i",
2742                        scancode);
2743        return NULL;
2744    }
2745
2746    const int key = _glfw.wl.keycodes[scancode];
2747    if (key == GLFW_KEY_UNKNOWN)
2748        return NULL;
2749
2750    const xkb_keycode_t keycode = scancode + 8;
2751    const xkb_layout_index_t layout =
2752        xkb_state_key_get_layout(_glfw.wl.xkb.state, keycode);
2753    if (layout == XKB_LAYOUT_INVALID)
2754    {
2755        _glfwInputError(GLFW_PLATFORM_ERROR,
2756                        "Wayland: Failed to retrieve layout for key name");
2757        return NULL;
2758    }
2759
2760    const xkb_keysym_t* keysyms = NULL;
2761    xkb_keymap_key_get_syms_by_level(_glfw.wl.xkb.keymap,
2762                                     keycode,
2763                                     layout,
2764                                     0,
2765                                     &keysyms);
2766    if (keysyms == NULL)
2767    {
2768        _glfwInputError(GLFW_PLATFORM_ERROR,
2769                        "Wayland: Failed to retrieve keysym for key name");
2770        return NULL;
2771    }
2772
2773    // WORKAROUND: xkb_keysym_to_utf8() requires the third parameter (size of the output buffer)
2774    // to be at least 7 (6 bytes + a null terminator), because it was written when UTF-8
2775    // sequences could be up to 6 bytes long. The _glfw.wl.keynames buffers are only 5 bytes
2776    // long, because UTF-8 sequences are now limited to 4 bytes and no codepoints were ever assigned
2777    // that needed more than that. To work around this, we first copy to a temporary buffer.
2778    //
2779    // See: https://github.com/xkbcommon/libxkbcommon/issues/418
2780    char temp_buffer[7];
2781    const int bytes_written = xkb_keysym_to_utf8(keysyms[0], temp_buffer, sizeof(temp_buffer));
2782    if (bytes_written <= 0 || bytes_written > 5)
2783    {
2784        _glfwInputError(GLFW_PLATFORM_ERROR,
2785                        "Wayland: Failed to encode keysym as UTF-8");
2786        return NULL;
2787    }
2788    memcpy(_glfw.wl.keynames[key], temp_buffer, bytes_written);
2789
2790    return _glfw.wl.keynames[key];
2791}
2792
2793int _glfwGetKeyScancodeWayland(int key)
2794{
2795    return _glfw.wl.scancodes[key];
2796}
2797
2798GLFWbool _glfwCreateCursorWayland(_GLFWcursor* cursor,
2799                                  const GLFWimage* image,
2800                                  int xhot, int yhot)
2801{
2802    cursor->wl.buffer = createShmBuffer(image);
2803    if (!cursor->wl.buffer)
2804        return GLFW_FALSE;
2805
2806    cursor->wl.width = image->width;
2807    cursor->wl.height = image->height;
2808    cursor->wl.xhot = xhot;
2809    cursor->wl.yhot = yhot;
2810    return GLFW_TRUE;
2811}
2812
2813GLFWbool _glfwCreateStandardCursorWayland(_GLFWcursor* cursor, int shape)
2814{
2815    const char* name = NULL;
2816
2817    // Try the XDG names first
2818    switch (shape)
2819    {
2820        case GLFW_ARROW_CURSOR:
2821            name = "default";
2822            break;
2823        case GLFW_IBEAM_CURSOR:
2824            name = "text";
2825            break;
2826        case GLFW_CROSSHAIR_CURSOR:
2827            name = "crosshair";
2828            break;
2829        case GLFW_POINTING_HAND_CURSOR:
2830            name = "pointer";
2831            break;
2832        case GLFW_RESIZE_EW_CURSOR:
2833            name = "ew-resize";
2834            break;
2835        case GLFW_RESIZE_NS_CURSOR:
2836            name = "ns-resize";
2837            break;
2838        case GLFW_RESIZE_NWSE_CURSOR:
2839            name = "nwse-resize";
2840            break;
2841        case GLFW_RESIZE_NESW_CURSOR:
2842            name = "nesw-resize";
2843            break;
2844        case GLFW_RESIZE_ALL_CURSOR:
2845            name = "all-scroll";
2846            break;
2847        case GLFW_NOT_ALLOWED_CURSOR:
2848            name = "not-allowed";
2849            break;
2850    }
2851
2852    cursor->wl.cursor = wl_cursor_theme_get_cursor(_glfw.wl.cursorTheme, name);
2853
2854    if (_glfw.wl.cursorThemeHiDPI)
2855    {
2856        cursor->wl.cursorHiDPI =
2857            wl_cursor_theme_get_cursor(_glfw.wl.cursorThemeHiDPI, name);
2858    }
2859
2860    if (!cursor->wl.cursor)
2861    {
2862        // Fall back to the core X11 names
2863        switch (shape)
2864        {
2865            case GLFW_ARROW_CURSOR:
2866                name = "left_ptr";
2867                break;
2868            case GLFW_IBEAM_CURSOR:
2869                name = "xterm";
2870                break;
2871            case GLFW_CROSSHAIR_CURSOR:
2872                name = "crosshair";
2873                break;
2874            case GLFW_POINTING_HAND_CURSOR:
2875                name = "hand2";
2876                break;
2877            case GLFW_RESIZE_EW_CURSOR:
2878                name = "sb_h_double_arrow";
2879                break;
2880            case GLFW_RESIZE_NS_CURSOR:
2881                name = "sb_v_double_arrow";
2882                break;
2883            case GLFW_RESIZE_ALL_CURSOR:
2884                name = "fleur";
2885                break;
2886            default:
2887                _glfwInputError(GLFW_CURSOR_UNAVAILABLE,
2888                                "Wayland: Standard cursor shape unavailable");
2889                return GLFW_FALSE;
2890        }
2891
2892        cursor->wl.cursor = wl_cursor_theme_get_cursor(_glfw.wl.cursorTheme, name);
2893        if (!cursor->wl.cursor)
2894        {
2895            _glfwInputError(GLFW_CURSOR_UNAVAILABLE,
2896                            "Wayland: Failed to create standard cursor \"%s\"",
2897                            name);
2898            return GLFW_FALSE;
2899        }
2900
2901        if (_glfw.wl.cursorThemeHiDPI)
2902        {
2903            if (!cursor->wl.cursorHiDPI)
2904            {
2905                cursor->wl.cursorHiDPI =
2906                    wl_cursor_theme_get_cursor(_glfw.wl.cursorThemeHiDPI, name);
2907            }
2908        }
2909    }
2910
2911    return GLFW_TRUE;
2912}
2913
2914void _glfwDestroyCursorWayland(_GLFWcursor* cursor)
2915{
2916    // If it's a standard cursor we don't need to do anything here
2917    if (cursor->wl.cursor)
2918        return;
2919
2920    if (cursor->wl.buffer)
2921        wl_buffer_destroy(cursor->wl.buffer);
2922}
2923
2924static void relativePointerHandleRelativeMotion(void* userData,
2925                                                struct zwp_relative_pointer_v1* pointer,
2926                                                uint32_t timeHi,
2927                                                uint32_t timeLo,
2928                                                wl_fixed_t dx,
2929                                                wl_fixed_t dy,
2930                                                wl_fixed_t dxUnaccel,
2931                                                wl_fixed_t dyUnaccel)
2932{
2933    _GLFWwindow* window = userData;
2934    double xpos = window->virtualCursorPosX;
2935    double ypos = window->virtualCursorPosY;
2936
2937    if (window->cursorMode != GLFW_CURSOR_DISABLED)
2938        return;
2939
2940    if (window->rawMouseMotion)
2941    {
2942        xpos += wl_fixed_to_double(dxUnaccel);
2943        ypos += wl_fixed_to_double(dyUnaccel);
2944    }
2945    else
2946    {
2947        xpos += wl_fixed_to_double(dx);
2948        ypos += wl_fixed_to_double(dy);
2949    }
2950
2951    _glfwInputCursorPos(window, xpos, ypos);
2952}
2953
2954static const struct zwp_relative_pointer_v1_listener relativePointerListener =
2955{
2956    relativePointerHandleRelativeMotion
2957};
2958
2959static void lockedPointerHandleLocked(void* userData,
2960                                      struct zwp_locked_pointer_v1* lockedPointer)
2961{
2962}
2963
2964static void lockedPointerHandleUnlocked(void* userData,
2965                                        struct zwp_locked_pointer_v1* lockedPointer)
2966{
2967}
2968
2969static const struct zwp_locked_pointer_v1_listener lockedPointerListener =
2970{
2971    lockedPointerHandleLocked,
2972    lockedPointerHandleUnlocked
2973};
2974
2975static void lockPointer(_GLFWwindow* window)
2976{
2977    if (!_glfw.wl.relativePointerManager)
2978    {
2979        _glfwInputError(GLFW_FEATURE_UNAVAILABLE,
2980                        "Wayland: The compositor does not support relative pointer motion");
2981        return;
2982    }
2983
2984    if (!_glfw.wl.pointerConstraints)
2985    {
2986        _glfwInputError(GLFW_FEATURE_UNAVAILABLE,
2987                        "Wayland: The compositor does not support locking the pointer");
2988    }
2989
2990    window->wl.relativePointer =
2991        zwp_relative_pointer_manager_v1_get_relative_pointer(
2992            _glfw.wl.relativePointerManager,
2993            _glfw.wl.pointer);
2994    zwp_relative_pointer_v1_add_listener(window->wl.relativePointer,
2995                                         &relativePointerListener,
2996                                         window);
2997
2998    window->wl.lockedPointer =
2999        zwp_pointer_constraints_v1_lock_pointer(
3000            _glfw.wl.pointerConstraints,
3001            window->wl.surface,
3002            _glfw.wl.pointer,
3003            NULL,
3004            ZWP_POINTER_CONSTRAINTS_V1_LIFETIME_PERSISTENT);
3005    zwp_locked_pointer_v1_add_listener(window->wl.lockedPointer,
3006                                       &lockedPointerListener,
3007                                       window);
3008}
3009
3010static void unlockPointer(_GLFWwindow* window)
3011{
3012    zwp_relative_pointer_v1_destroy(window->wl.relativePointer);
3013    window->wl.relativePointer = NULL;
3014
3015    zwp_locked_pointer_v1_destroy(window->wl.lockedPointer);
3016    window->wl.lockedPointer = NULL;
3017}
3018
3019static void confinedPointerHandleConfined(void* userData,
3020                                          struct zwp_confined_pointer_v1* confinedPointer)
3021{
3022}
3023
3024static void confinedPointerHandleUnconfined(void* userData,
3025                                            struct zwp_confined_pointer_v1* confinedPointer)
3026{
3027}
3028
3029static const struct zwp_confined_pointer_v1_listener confinedPointerListener =
3030{
3031    confinedPointerHandleConfined,
3032    confinedPointerHandleUnconfined
3033};
3034
3035static void confinePointer(_GLFWwindow* window)
3036{
3037    if (!_glfw.wl.pointerConstraints)
3038    {
3039        _glfwInputError(GLFW_FEATURE_UNAVAILABLE,
3040                        "Wayland: The compositor does not support confining the pointer");
3041    }
3042
3043    window->wl.confinedPointer =
3044        zwp_pointer_constraints_v1_confine_pointer(
3045            _glfw.wl.pointerConstraints,
3046            window->wl.surface,
3047            _glfw.wl.pointer,
3048            NULL,
3049            ZWP_POINTER_CONSTRAINTS_V1_LIFETIME_PERSISTENT);
3050
3051    zwp_confined_pointer_v1_add_listener(window->wl.confinedPointer,
3052                                         &confinedPointerListener,
3053                                         window);
3054}
3055
3056static void unconfinePointer(_GLFWwindow* window)
3057{
3058    zwp_confined_pointer_v1_destroy(window->wl.confinedPointer);
3059    window->wl.confinedPointer = NULL;
3060}
3061
3062void _glfwSetCursorWayland(_GLFWwindow* window, _GLFWcursor* cursor)
3063{
3064    if (!_glfw.wl.pointer)
3065        return;
3066
3067    window->wl.currentCursor = cursor;
3068
3069    // If we're not in the correct window just save the cursor
3070    // the next time the pointer enters the window the cursor will change
3071    if (!window->wl.hovered)
3072        return;
3073
3074    // Update pointer lock to match cursor mode
3075    if (window->cursorMode == GLFW_CURSOR_DISABLED)
3076    {
3077        if (window->wl.confinedPointer)
3078            unconfinePointer(window);
3079        if (!window->wl.lockedPointer)
3080            lockPointer(window);
3081    }
3082    else if (window->cursorMode == GLFW_CURSOR_CAPTURED)
3083    {
3084        if (window->wl.lockedPointer)
3085            unlockPointer(window);
3086        if (!window->wl.confinedPointer)
3087            confinePointer(window);
3088    }
3089    else if (window->cursorMode == GLFW_CURSOR_NORMAL ||
3090             window->cursorMode == GLFW_CURSOR_HIDDEN)
3091    {
3092        if (window->wl.lockedPointer)
3093            unlockPointer(window);
3094        else if (window->wl.confinedPointer)
3095            unconfinePointer(window);
3096    }
3097
3098    if (window->cursorMode == GLFW_CURSOR_NORMAL ||
3099        window->cursorMode == GLFW_CURSOR_CAPTURED)
3100    {
3101        if (cursor)
3102            setCursorImage(window, &cursor->wl);
3103        else
3104        {
3105            struct wl_cursor* defaultCursor =
3106                wl_cursor_theme_get_cursor(_glfw.wl.cursorTheme, "left_ptr");
3107            if (!defaultCursor)
3108            {
3109                _glfwInputError(GLFW_PLATFORM_ERROR,
3110                                "Wayland: Standard cursor not found");
3111                return;
3112            }
3113
3114            struct wl_cursor* defaultCursorHiDPI = NULL;
3115            if (_glfw.wl.cursorThemeHiDPI)
3116            {
3117                defaultCursorHiDPI =
3118                    wl_cursor_theme_get_cursor(_glfw.wl.cursorThemeHiDPI, "left_ptr");
3119            }
3120
3121            _GLFWcursorWayland cursorWayland =
3122            {
3123                defaultCursor,
3124                defaultCursorHiDPI,
3125                NULL,
3126                0, 0,
3127                0, 0,
3128                0
3129            };
3130
3131            setCursorImage(window, &cursorWayland);
3132        }
3133    }
3134    else if (window->cursorMode == GLFW_CURSOR_HIDDEN ||
3135             window->cursorMode == GLFW_CURSOR_DISABLED)
3136    {
3137        wl_pointer_set_cursor(_glfw.wl.pointer, _glfw.wl.pointerEnterSerial, NULL, 0, 0);
3138    }
3139}
3140
3141static void dataSourceHandleTarget(void* userData,
3142                                   struct wl_data_source* source,
3143                                   const char* mimeType)
3144{
3145    if (_glfw.wl.selectionSource != source)
3146    {
3147        _glfwInputError(GLFW_PLATFORM_ERROR,
3148                        "Wayland: Unknown clipboard data source");
3149        return;
3150    }
3151}
3152
3153static void dataSourceHandleSend(void* userData,
3154                                 struct wl_data_source* source,
3155                                 const char* mimeType,
3156                                 int fd)
3157{
3158    // Ignore it if this is an outdated or invalid request
3159    if (_glfw.wl.selectionSource != source ||
3160        strcmp(mimeType, "text/plain;charset=utf-8") != 0)
3161    {
3162        close(fd);
3163        return;
3164    }
3165
3166    char* string = _glfw.wl.clipboardString;
3167    size_t length = strlen(string);
3168
3169    while (length > 0)
3170    {
3171        const ssize_t result = write(fd, string, length);
3172        if (result == -1)
3173        {
3174            if (errno == EINTR)
3175                continue;
3176
3177            _glfwInputError(GLFW_PLATFORM_ERROR,
3178                            "Wayland: Error while writing the clipboard: %s",
3179                            strerror(errno));
3180            break;
3181        }
3182
3183        length -= result;
3184        string += result;
3185    }
3186
3187    close(fd);
3188}
3189
3190static void dataSourceHandleCancelled(void* userData,
3191                                      struct wl_data_source* source)
3192{
3193    wl_data_source_destroy(source);
3194
3195    if (_glfw.wl.selectionSource != source)
3196        return;
3197
3198    _glfw.wl.selectionSource = NULL;
3199}
3200
3201static const struct wl_data_source_listener dataSourceListener =
3202{
3203    dataSourceHandleTarget,
3204    dataSourceHandleSend,
3205    dataSourceHandleCancelled,
3206};
3207
3208void _glfwSetClipboardStringWayland(const char* string)
3209{
3210    if (_glfw.wl.selectionSource)
3211    {
3212        wl_data_source_destroy(_glfw.wl.selectionSource);
3213        _glfw.wl.selectionSource = NULL;
3214    }
3215
3216    char* copy = _glfw_strdup(string);
3217    if (!copy)
3218    {
3219        _glfwInputError(GLFW_OUT_OF_MEMORY, NULL);
3220        return;
3221    }
3222
3223    _glfw_free(_glfw.wl.clipboardString);
3224    _glfw.wl.clipboardString = copy;
3225
3226    _glfw.wl.selectionSource =
3227        wl_data_device_manager_create_data_source(_glfw.wl.dataDeviceManager);
3228    if (!_glfw.wl.selectionSource)
3229    {
3230        _glfwInputError(GLFW_PLATFORM_ERROR,
3231                        "Wayland: Failed to create clipboard data source");
3232        return;
3233    }
3234    wl_data_source_add_listener(_glfw.wl.selectionSource,
3235                                &dataSourceListener,
3236                                NULL);
3237    wl_data_source_offer(_glfw.wl.selectionSource, "text/plain;charset=utf-8");
3238    wl_data_device_set_selection(_glfw.wl.dataDevice,
3239                                 _glfw.wl.selectionSource,
3240                                 _glfw.wl.serial);
3241}
3242
3243const char* _glfwGetClipboardStringWayland(void)
3244{
3245    if (!_glfw.wl.selectionOffer)
3246    {
3247        _glfwInputError(GLFW_FORMAT_UNAVAILABLE,
3248                        "Wayland: No clipboard data available");
3249        return NULL;
3250    }
3251
3252    if (_glfw.wl.selectionSource)
3253        return _glfw.wl.clipboardString;
3254
3255    _glfw_free(_glfw.wl.clipboardString);
3256    _glfw.wl.clipboardString =
3257        readDataOfferAsString(_glfw.wl.selectionOffer, "text/plain;charset=utf-8");
3258    return _glfw.wl.clipboardString;
3259}
3260
3261EGLenum _glfwGetEGLPlatformWayland(EGLint** attribs)
3262{
3263    if (_glfw.egl.EXT_platform_base && _glfw.egl.EXT_platform_wayland)
3264        return EGL_PLATFORM_WAYLAND_EXT;
3265    else
3266        return 0;
3267}
3268
3269EGLNativeDisplayType _glfwGetEGLNativeDisplayWayland(void)
3270{
3271    return _glfw.wl.display;
3272}
3273
3274EGLNativeWindowType _glfwGetEGLNativeWindowWayland(_GLFWwindow* window)
3275{
3276    return window->wl.egl.window;
3277}
3278
3279void _glfwGetRequiredInstanceExtensionsWayland(char** extensions)
3280{
3281    if (!_glfw.vk.KHR_surface || !_glfw.vk.KHR_wayland_surface)
3282        return;
3283
3284    extensions[0] = "VK_KHR_surface";
3285    extensions[1] = "VK_KHR_wayland_surface";
3286}
3287
3288GLFWbool _glfwGetPhysicalDevicePresentationSupportWayland(VkInstance instance,
3289                                                          VkPhysicalDevice device,
3290                                                          uint32_t queuefamily)
3291{
3292    PFN_vkGetPhysicalDeviceWaylandPresentationSupportKHR
3293        vkGetPhysicalDeviceWaylandPresentationSupportKHR =
3294        (PFN_vkGetPhysicalDeviceWaylandPresentationSupportKHR)
3295        vkGetInstanceProcAddr(instance, "vkGetPhysicalDeviceWaylandPresentationSupportKHR");
3296    if (!vkGetPhysicalDeviceWaylandPresentationSupportKHR)
3297    {
3298        _glfwInputError(GLFW_API_UNAVAILABLE,
3299                        "Wayland: Vulkan instance missing VK_KHR_wayland_surface extension");
3300        return VK_NULL_HANDLE;
3301    }
3302
3303    return vkGetPhysicalDeviceWaylandPresentationSupportKHR(device,
3304                                                            queuefamily,
3305                                                            _glfw.wl.display);
3306}
3307
3308VkResult _glfwCreateWindowSurfaceWayland(VkInstance instance,
3309                                         _GLFWwindow* window,
3310                                         const VkAllocationCallbacks* allocator,
3311                                         VkSurfaceKHR* surface)
3312{
3313    VkResult err;
3314    VkWaylandSurfaceCreateInfoKHR sci;
3315    PFN_vkCreateWaylandSurfaceKHR vkCreateWaylandSurfaceKHR;
3316
3317    vkCreateWaylandSurfaceKHR = (PFN_vkCreateWaylandSurfaceKHR)
3318        vkGetInstanceProcAddr(instance, "vkCreateWaylandSurfaceKHR");
3319    if (!vkCreateWaylandSurfaceKHR)
3320    {
3321        _glfwInputError(GLFW_API_UNAVAILABLE,
3322                        "Wayland: Vulkan instance missing VK_KHR_wayland_surface extension");
3323        return VK_ERROR_EXTENSION_NOT_PRESENT;
3324    }
3325
3326    memset(&sci, 0, sizeof(sci));
3327    sci.sType = VK_STRUCTURE_TYPE_WAYLAND_SURFACE_CREATE_INFO_KHR;
3328    sci.display = _glfw.wl.display;
3329    sci.surface = window->wl.surface;
3330
3331    err = vkCreateWaylandSurfaceKHR(instance, &sci, allocator, surface);
3332    if (err)
3333    {
3334        _glfwInputError(GLFW_PLATFORM_ERROR,
3335                        "Wayland: Failed to create Vulkan surface: %s",
3336                        _glfwGetVulkanResultString(err));
3337    }
3338
3339    return err;
3340}
3341
3342
3343//////////////////////////////////////////////////////////////////////////
3344//////                        GLFW native API                       //////
3345//////////////////////////////////////////////////////////////////////////
3346
3347GLFWAPI struct wl_display* glfwGetWaylandDisplay(void)
3348{
3349    _GLFW_REQUIRE_INIT_OR_RETURN(NULL);
3350
3351    if (_glfw.platform.platformID != GLFW_PLATFORM_WAYLAND)
3352    {
3353        _glfwInputError(GLFW_PLATFORM_UNAVAILABLE,
3354                        "Wayland: Platform not initialized");
3355        return NULL;
3356    }
3357
3358    return _glfw.wl.display;
3359}
3360
3361GLFWAPI struct wl_surface* glfwGetWaylandWindow(GLFWwindow* handle)
3362{
3363    _GLFW_REQUIRE_INIT_OR_RETURN(NULL);
3364
3365    if (_glfw.platform.platformID != GLFW_PLATFORM_WAYLAND)
3366    {
3367        _glfwInputError(GLFW_PLATFORM_UNAVAILABLE,
3368                        "Wayland: Platform not initialized");
3369        return NULL;
3370    }
3371
3372    _GLFWwindow* window = (_GLFWwindow*) handle;
3373    assert(window != NULL);
3374
3375    return window->wl.surface;
3376}
3377
3378#endif // _GLFW_WAYLAND
3379
3380
[FILE END]
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