initial commit

wayland/buffer.c

@@ -0,0 +1,215 @@
+// SPDX-License-Identifier: GPL-3.0-only
+/*
+ * Wayland buffer management.
+ *
+ * Copyright (c) 2024, Richard Acayan. All rights reserved.
+ */
+
+#include <errno.h>
+#include <fcntl.h>
+#include <stdbool.h>
+#include <sys/mman.h>
+#include <unistd.h>
+#include <wayland-client-protocol.h>
+
+#include "wayland.h"
+
+static int commit_buffer_resize(struct ufkbd_wl_buffer *ctx);
+
+static void on_buffer_release(void *data, struct wl_buffer *buf)
+{
+	struct ufkbd_wl_buffer *ctx = data;
+
+	if (ctx->resize)
+		commit_buffer_resize(ctx);
+
+	ctx->avail = true;
+}
+
+static const struct wl_buffer_listener buf_listener = {
+	.release = on_buffer_release,
+};
+
+static int commit_buffer_resize(struct ufkbd_wl_buffer *ctx)
+{
+	int ret;
+
+	wl_buffer_destroy(ctx->buf);
+
+	ret = ftruncate(ctx->fd, ctx->size);
+	if (ret == -1) {
+		perror("wl: failed to resize shared memory");
+		return -errno;
+	}
+
+	ctx->ptr = mmap(NULL, ctx->size, PROT_READ | PROT_WRITE, MAP_SHARED, ctx->fd, 0);
+	if (ctx->ptr == MAP_FAILED) {
+		perror("wl: failed to map buffer");
+		return -errno;
+	}
+
+	wl_shm_pool_resize(ctx->pool, ctx->size);
+
+	ctx->buf = wl_shm_pool_create_buffer(ctx->pool, 0,
+					     ctx->width, ctx->height,
+					     ctx->width * 4,
+					     WL_SHM_FORMAT_XRGB8888);
+	if (ctx->buf == NULL) {
+		fprintf(stderr, "wl: lost a buffer to failed resize\n");
+		ctx->avail = false;
+	}
+
+	wl_buffer_add_listener(ctx->buf, &buf_listener, ctx);
+
+	ctx->resize = false;
+
+	return 0;
+}
+
+static void on_wl_shm(void *data,
+		      struct wl_registry *reg,
+		      uint32_t name, uint32_t ver)
+{
+	struct ufkbd_wl_buffer *ctx = data;
+
+	ctx->wl = wl_registry_bind(reg, name, &wl_shm_interface, ver);
+	if (ctx->wl == NULL) {
+		fprintf(stderr, "wl: failed to bind to shared memory\n");
+		return;
+	}
+
+	ctx->pool = wl_shm_create_pool(ctx->wl, ctx->fd, 4);
+	if (ctx->pool == NULL) {
+		fprintf(stderr, "wl: failed to create memory pool\n");
+		return;
+	}
+
+	ctx->buf = wl_shm_pool_create_buffer(ctx->pool, 0,
+					     1, 1, 4,
+					     WL_SHM_FORMAT_XRGB8888);
+	if (ctx->buf == NULL) {
+		fprintf(stderr, "wl: failed to create buffer\n");
+		return;
+	}
+
+	wl_buffer_add_listener(ctx->buf, &buf_listener, ctx);
+}
+
+int ufkbd_wl_buffer_consume(struct ufkbd_wl_buffer *ctx,
+				    struct wl_buffer **buf, void **ptr)
+{
+	if (buf == NULL || ptr == NULL)
+		return -EINVAL;
+
+	if (!ctx->avail)
+		return -EBUSY;
+
+	ctx->avail = false;
+
+	*buf = ctx->buf;
+	*ptr = ctx->ptr;
+
+	return 0;
+}
+
+int ufkbd_wl_buffer_resize(struct ufkbd_wl_buffer *ctx,
+				   uint32_t width, uint32_t height)
+{
+	int ret;
+
+	if (width == 0 && height == 0)
+		return -EINVAL;
+
+	ctx->width = width;
+	ctx->height = height;
+
+	if (ctx->size < ctx->width * ctx->height * 4) {
+		munmap(ctx->ptr, ctx->size);
+
+		ctx->size = ctx->width * ctx->height * 4;
+	}
+
+	if (ctx->avail) {
+		ret = commit_buffer_resize(ctx);
+		if (ret)
+			return ret;
+	} else {
+		ctx->resize = true;
+	}
+
+	return 0;
+}
+
+int ufkbd_wl_buffer_init(struct ufkbd_wl_buffer *ctx,
+				 struct ufkbd_input_wayland *ufkbd_wl,
+				 unsigned int id)
+{
+	intmax_t pid;
+	int ret;
+
+	ctx->ufkbd = ufkbd_wl->ufkbd;
+	ctx->id = id;
+
+	ctx->avail = true;
+	ctx->dirty = false;
+	ctx->resize = false;
+
+	ctx->listener.iface = &wl_shm_interface;
+	ctx->listener.cb = on_wl_shm;
+	ctx->listener.data = ctx;
+
+	pid = getpid();
+
+	snprintf(ctx->path, SHM_PATH_SIZE, "/wl_shm_ufkbd_pid%jd_%u", pid, id);
+	ctx->path[SHM_PATH_SIZE - 1] = '\0';
+
+	ctx->fd = shm_open(ctx->path, O_RDWR | O_CREAT | O_EXCL, 0600);
+	if (ctx->fd == -1) {
+		perror("wl: failed to create shared memory");
+		return -errno;
+	}
+
+	ret = ftruncate(ctx->fd, 4);
+	if (ret) {
+		perror("wl: failed to allocate 4 bytes on shm");
+		ret = -errno;
+		goto err;
+	}
+
+	ctx->ptr = mmap(NULL, 4, PROT_READ | PROT_WRITE, MAP_SHARED, ctx->fd, 0);
+	if (ctx->ptr == MAP_FAILED) {
+		perror("wl: failed to map buffer");
+		ret = -errno;
+		goto err;
+	}
+
+	ret = ufkbd_wl_global_listener_add(ufkbd_wl, &ctx->listener);
+	if (ret)
+		goto err;
+
+	ctx->width = 1; 
+	ctx->height = 1; 
+	ctx->size = 4;
+
+	return 0;
+
+err:
+	close(ctx->fd);
+	shm_unlink(ctx->path);
+	return ret;
+}
+
+void ufkbd_wl_buffer_uninit(struct ufkbd_wl_buffer *ctx)
+{
+	if (ctx->buf != NULL)
+		wl_buffer_destroy(ctx->buf);
+
+	if (ctx->pool != NULL)
+		wl_shm_pool_destroy(ctx->pool);
+
+	if (ctx->wl != NULL)
+		wl_shm_destroy(ctx->wl);
+
+	close(ctx->fd);
+	shm_unlink(ctx->path);
+}

wayland/driver.c

@@ -0,0 +1,247 @@
+// SPDX-License-Identifier: GPL-3.0-only
+/*
+ * Wayland driver.
+ *
+ * Copyright (c) 2024, Richard Acayan. All rights reserved.
+ */
+
+#include <errno.h>
+#include <poll.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <wayland-client.h>
+#include <xkbcommon/xkbcommon.h>
+
+#include "input.h"
+#include "ufkbd.h"
+#include "wayland.h"
+
+static void on_global_object(void *data,
+			     struct wl_registry *reg,
+			     uint32_t name,
+			     const char *iface,
+			     uint32_t version);
+
+static const struct wl_registry_listener reg_listener = {
+	.global = on_global_object,
+	.global_remove = NULL,
+};
+
+static void on_global_object(void *data,
+			     struct wl_registry *reg,
+			     uint32_t name,
+			     const char *iface,
+			     uint32_t version)
+{
+	struct ufkbd_input_wayland *ctx = data;
+	struct ufkbd_wl_global_listener *listener;
+	size_t i;
+
+	// This is assumed to be a small list.
+	for (i = 0; i < ctx->n_global_listeners; i++) {
+		listener = ctx->global_listeners[i];
+
+		if (!strcmp(iface, listener->iface->name))
+			listener->cb(listener->data, reg, name, version);
+	}
+}
+
+int ufkbd_wl_global_listener_add(struct ufkbd_input_wayland *ctx,
+				 struct ufkbd_wl_global_listener *listener)
+{
+	size_t idx = ctx->n_global_listeners;
+
+	if (idx >= MAX_GLOBAL_LISTENERS) {
+		fprintf(stderr, "wl: no space for internal callback\n");
+		return -ENOSPC;
+	}
+
+	ctx->global_listeners[idx] = listener;
+	ctx->n_global_listeners++;
+
+	return 0;
+}
+
+static void ufkbd_wayland_listen_one(void *data, bool block)
+{
+	struct ufkbd_input_wayland *ctx = data;
+	struct pollfd pollfd;
+	int timeout = 0;
+	int ret;
+
+	if (block)
+		timeout = -1;
+
+	// Some listen events may be queued, so send them.
+	ret = wl_display_flush(ctx->display);
+	if (ret < 0)
+		fprintf(stderr, "warn: failed to flush outgoing events: %d\n", -errno);
+
+	pollfd.fd = ctx->fd;
+	pollfd.events = POLLIN;
+	pollfd.revents = 0;
+
+	ret = poll(&pollfd, 1, timeout);
+	if (ret == -1)
+		return;
+
+	if (pollfd.revents) {
+		ret = wl_display_dispatch(ctx->display);
+		if (ret == -1)
+			return;
+	}
+}
+
+static void ufkbd_wayland_listen_step(void *data, int timeout)
+{
+	struct ufkbd_input_wayland *ctx = data;
+	struct pollfd pollfd;
+	int ret;
+
+	// Some listen events may be queued, so send them.
+	ret = wl_display_flush(ctx->display);
+	if (ret < 0)
+		fprintf(stderr, "warn: failed to flush outgoing events: %d\n", -errno);
+
+	pollfd.fd = ctx->fd;
+	pollfd.events = POLLIN;
+	pollfd.revents = 0;
+
+	ret = poll(&pollfd, 1, timeout);
+	if (ret == -1)
+		return;
+
+	if (pollfd.revents) {
+		ret = wl_display_dispatch(ctx->display);
+		if (ret == -1)
+			return;
+	}
+}
+
+static int ufkbd_wayland_send_key(void *data, int code, bool repeat)
+{
+	struct ufkbd_input_wayland *ctx = data;
+
+	ufkbd_wl_input_send_key(ctx->input, code - 8, repeat);
+
+	return 0;
+}
+
+static int ufkbd_wayland_send_mod(void *data, enum ufkbd_modifier mod, bool pressed)
+{
+	struct ufkbd_input_wayland *ctx = data;
+
+	ufkbd_wl_input_send_mod(ctx->input, mod, pressed);
+
+	return 0;
+}
+
+static int ufkbd_wayland_draw_begin(void *data, size_t *stride, void **ptr)
+{
+	struct ufkbd_input_wayland *ctx = data;
+	struct wl_buffer *buf;
+	int ret;
+
+	ret = ufkbd_wl_surface_consume_buffer(ctx->surface, &buf, ptr);
+	if (ret) {
+		fprintf(stderr, "wl: warn: could not consume buffer: %s\n",
+			strerror(-ret));
+		return ret;
+	}
+
+	wl_surface_attach(ctx->surface->wl, buf, 0, 0);
+
+	// NOPUSH
+	*stride = (size_t) ctx->surface->bufs[0].width * 4;
+
+	return 0;
+}
+
+static void ufkbd_wayland_draw_touch(void *data, int x, int y, int width, int height)
+{
+	struct ufkbd_input_wayland *ctx = data;
+
+	wl_surface_damage_buffer(ctx->surface->wl, x, y, width, height);
+}
+
+static void ufkbd_wayland_draw_end(void *data)
+{
+	struct ufkbd_input_wayland *ctx = data;
+
+	wl_surface_commit(ctx->surface->wl);
+}
+
+static void *ufkbd_wayland_init(struct ufkbd_ctx *ufkbd)
+{
+	struct ufkbd_input_wayland *ctx;
+	int ret;
+
+	if (ufkbd == NULL)
+		return NULL;
+
+	ctx = calloc(1, sizeof(*ctx));
+	if (ctx == NULL)
+		return NULL;
+
+	ctx->ufkbd = ufkbd;
+
+	ctx->display = wl_display_connect(NULL);
+	if (ctx->display == NULL)
+		goto err_free_ctx;
+
+	ctx->registry = wl_display_get_registry(ctx->display);
+	if (ctx->registry == NULL)
+		goto err_disconnect;
+
+	ret = wl_registry_add_listener(ctx->registry, &reg_listener, ctx);
+	if (ret)
+		goto err_destroy_reg;
+
+	ret = ufkbd_wl_surface_init(ctx, &ctx->surface);
+	if (ret)
+		goto err_destroy_reg;
+
+	ret = ufkbd_wl_input_init(ctx, &ctx->input);
+	if (ret)
+		goto err_uninit_surface;
+
+	ctx->fd = wl_display_get_fd(ctx->display);
+
+	return ctx;
+
+err_uninit_surface:
+	ufkbd_wl_surface_uninit(ctx->surface);
+err_destroy_reg:
+	wl_registry_destroy(ctx->registry);
+err_disconnect:
+	wl_display_disconnect(ctx->display);
+err_free_ctx:
+	free(ctx);
+	return NULL;
+}
+
+static void ufkbd_wayland_uninit(void *data)
+{
+	struct ufkbd_input_wayland *ctx = data;
+
+	ufkbd_wl_input_uninit(ctx->input);
+	ufkbd_wl_surface_uninit(ctx->surface);
+
+	wl_registry_destroy(ctx->registry);
+	wl_display_disconnect(ctx->display);
+
+	free(ctx);
+}
+
+struct ufkbd_driver ufkbd_wayland = {
+	.init = ufkbd_wayland_init,
+	.uninit = ufkbd_wayland_uninit,
+	.listen_one = ufkbd_wayland_listen_one,
+	.listen_step = ufkbd_wayland_listen_step,
+	.send_key = ufkbd_wayland_send_key,
+	.send_mod = ufkbd_wayland_send_mod,
+	.draw_begin = ufkbd_wayland_draw_begin,
+	.draw_touch = ufkbd_wayland_draw_touch,
+	.draw_end = ufkbd_wayland_draw_end,
+};

wayland/input.c

@@ -0,0 +1,316 @@
+// SPDX-License-Identifier: GPL-3.0-only
+/*
+ * Wayland input handling.
+ *
+ * Copyright (c) 2024, Richard Acayan. All rights reserved.
+ */
+
+#include <errno.h>
+#include <fcntl.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <wayland-client-protocol.h>
+#include <xkbcommon/xkbcommon.h>
+
+#include "input.h"
+#include "keymap.h"
+#include "ufkbd.h"
+#include "wayland.h"
+#include "wayland/input-method-unstable-v2.h"
+#include "wayland/virtual-keyboard-unstable-v1.h"
+
+static void ignore()
+{}
+
+static void on_pointer_move(void *data,
+			    struct wl_pointer *pointer __attribute__((unused)),
+			    uint32_t serial __attribute__((unused)),
+			    wl_fixed_t x,
+			    wl_fixed_t y)
+{
+	struct ufkbd_wl_input *ctx = data;
+	struct ufkbd_input_wayland *ufkbd_wl = ctx->ufkbd_wl;
+	struct ufkbd_ctx *ufkbd = ufkbd_wl->ufkbd;
+
+	ufkbd_input_position(ufkbd, UFKBD_PRESS_MAX - 1, x / 256, y / 256);
+}
+
+static void on_pointer_button(void *data,
+			      struct wl_pointer *pointer,
+			      uint32_t serial,
+			      uint32_t time,
+			      uint32_t button,
+			      uint32_t state)
+{
+	struct ufkbd_wl_input *ctx = data;
+	struct ufkbd_input_wayland *ufkbd_wl = ctx->ufkbd_wl;
+	struct ufkbd_ctx *ufkbd = ufkbd_wl->ufkbd;
+
+	if (state == WL_POINTER_BUTTON_STATE_PRESSED)
+		ufkbd_input_press(ufkbd, UFKBD_PRESS_MAX - 1);
+	else if (state == WL_POINTER_BUTTON_STATE_RELEASED)
+		ufkbd_input_release(ufkbd, UFKBD_PRESS_MAX - 1);
+}
+
+static const struct wl_pointer_listener pointer_listener = {
+	.enter = ignore,
+	.leave = ignore,
+	.motion = on_pointer_move,
+	.button = on_pointer_button,
+	.axis = ignore,
+	.frame = ignore,
+	.axis_source = ignore,
+	.axis_stop = ignore,
+	.axis_discrete = ignore,
+	.axis_value120 = ignore,
+	.axis_relative_direction = ignore,
+};
+
+void on_touch_down(void *data,
+		   struct wl_touch *wl_touch,
+		   uint32_t serial,
+		   uint32_t time,
+		   struct wl_surface *surface,
+		   int32_t id,
+		   wl_fixed_t x,
+		   wl_fixed_t y)
+{
+	struct ufkbd_wl_input *ctx = data;
+	struct ufkbd_input_wayland *ufkbd_wl = ctx->ufkbd_wl;
+	struct ufkbd_ctx *ufkbd = ufkbd_wl->ufkbd;
+
+	ufkbd_input_position(ufkbd, id, x / 256, y / 256);
+	ufkbd_input_press(ufkbd, id);
+}
+
+void on_touch_up(void *data,
+		 struct wl_touch *wl_touch,
+		 uint32_t serial,
+		 uint32_t time,
+		 int32_t id)
+{
+	struct ufkbd_wl_input *ctx = data;
+	struct ufkbd_input_wayland *ufkbd_wl = ctx->ufkbd_wl;
+	struct ufkbd_ctx *ufkbd = ufkbd_wl->ufkbd;
+
+	ufkbd_input_release(ufkbd, id);
+}
+
+void on_touch_motion(void *data,
+		     struct wl_touch *wl_touch,
+		     uint32_t time,
+		     int32_t id,
+		     wl_fixed_t x,
+		     wl_fixed_t y)
+{
+	struct ufkbd_wl_input *ctx = data;
+	struct ufkbd_input_wayland *ufkbd_wl = ctx->ufkbd_wl;
+	struct ufkbd_ctx *ufkbd = ufkbd_wl->ufkbd;
+
+	ufkbd_input_position(ufkbd, id, x / 256, y / 256);
+}
+
+static const struct wl_touch_listener touch_listener = {
+	.down = on_touch_down,
+	.up = on_touch_up,
+	.motion = on_touch_motion,
+	.frame = ignore,
+	.cancel = ignore,
+	.shape = ignore,
+	.orientation = ignore,
+};
+
+static void on_seat_caps(void *data,
+			 struct wl_seat *seat,
+			 uint32_t capabilities)
+{
+	struct ufkbd_wl_input *ctx = data;
+
+	if (capabilities & WL_SEAT_CAPABILITY_TOUCH) {
+		ctx->touch = wl_seat_get_touch(seat);
+		if (ctx->touch == NULL)
+			return;
+
+		wl_touch_add_listener(ctx->touch, &touch_listener, ctx);
+	} else {
+		if (ctx->touch != NULL)
+			wl_touch_destroy(ctx->touch);
+
+		ctx->touch = NULL;
+	}
+
+	if (capabilities & WL_SEAT_CAPABILITY_POINTER) {
+		ctx->pointer = wl_seat_get_pointer(seat);
+		if (ctx->pointer == NULL)
+			return;
+
+		wl_pointer_add_listener(ctx->pointer, &pointer_listener, ctx);
+	} else {
+		if (ctx->pointer != NULL)
+			wl_pointer_destroy(ctx->pointer);
+
+		ctx->pointer = NULL;
+	}
+}
+
+static void on_seat_name(void *data,
+			 struct wl_seat *seat,
+			 const char *name)
+{
+	printf("wl: found seat %s\n", name);
+}
+
+struct wl_seat_listener seat_listener = {
+	.name = on_seat_name,
+	.capabilities = on_seat_caps,
+};
+
+static int try_create_virtual_keyboard(struct ufkbd_wl_input *ctx)
+{
+	struct ufkbd_keymap *keymap = ctx->ufkbd_wl->ufkbd->keymap;
+
+	if (ctx->manager == NULL)
+		return -EINVAL;
+
+	if (ctx->seat == NULL)
+		return -EINVAL;
+
+	if (ctx->kb != NULL)
+		return -EEXIST;
+
+	ctx->kb = zwp_virtual_keyboard_manager_v1_create_virtual_keyboard(ctx->manager,
+									  ctx->seat);
+	if (ctx->kb == NULL)
+		return -ENOMEM;
+
+	zwp_virtual_keyboard_v1_keymap(ctx->kb, WL_KEYBOARD_KEYMAP_FORMAT_XKB_V1,
+				       keymap->fd, keymap->size);
+
+	return 0;
+}
+
+static void on_global_vkman(void *data,
+			    struct wl_registry *reg,
+			    uint32_t name, uint32_t version)
+{
+	struct ufkbd_wl_input *ctx = data;
+
+	ctx->manager = wl_registry_bind(reg, name,
+					&zwp_virtual_keyboard_manager_v1_interface,
+					version);
+	if (ctx->manager == NULL)
+		return;
+
+	try_create_virtual_keyboard(ctx);
+}
+
+static void on_global_seat(void *data,
+			   struct wl_registry *reg,
+			   uint32_t name, uint32_t version)
+{
+	struct ufkbd_wl_input *ctx = data;
+
+	ctx->seat = wl_registry_bind(reg, name, &wl_seat_interface, version);
+	if (ctx->seat == NULL)
+		return;
+
+	wl_seat_add_listener(ctx->seat, &seat_listener, ctx);
+
+	try_create_virtual_keyboard(ctx);
+}
+
+int ufkbd_wl_input_send_key(struct ufkbd_wl_input *ctx, int key, bool repeat)
+{
+	if (ctx->kb == NULL)
+		return -ENODEV;
+
+	zwp_virtual_keyboard_v1_key(ctx->kb, 0, key, WL_KEYBOARD_KEY_STATE_PRESSED);
+
+	if (!repeat)
+		zwp_virtual_keyboard_v1_key(ctx->kb, 0, key, WL_KEYBOARD_KEY_STATE_RELEASED);
+
+	return 0;
+}
+
+int ufkbd_wl_input_send_mod(struct ufkbd_wl_input *ctx, enum ufkbd_modifier mod, bool pressed)
+{
+	int bit;
+
+	if (ctx->kb == NULL)
+		return -ENODEV;
+
+	if (mod == UFKBD_MOD_SHIFT)
+		bit = 0x1;
+	else if (mod == UFKBD_MOD_CTRL)
+		bit = 0x4;
+	else if (mod == UFKBD_MOD_ALT)
+		bit = 0x8;
+	else
+		bit = 0;
+
+	if (pressed)
+		ctx->mod_state |= bit;
+	else
+		ctx->mod_state &= ~bit;
+
+	zwp_virtual_keyboard_v1_modifiers(ctx->kb, ctx->mod_state, 0, 0, 0);
+
+	return 0;
+}
+
+int ufkbd_wl_input_init(struct ufkbd_input_wayland *ufkbd_wl,
+			struct ufkbd_wl_input **out)
+{
+	struct ufkbd_wl_input *ctx;
+	int ret;
+
+	ctx = calloc(1, sizeof(*ctx));
+	if (ctx == NULL)
+		return -errno;
+
+	ctx->ufkbd_wl = ufkbd_wl;
+
+	ctx->listener_seat.iface = &wl_seat_interface;
+	ctx->listener_seat.cb = on_global_seat;
+	ctx->listener_seat.data = ctx;
+
+	ret = ufkbd_wl_global_listener_add(ufkbd_wl, &ctx->listener_seat);
+	if (ret)
+		goto err;
+
+	ctx->listener_manager.iface = &zwp_virtual_keyboard_manager_v1_interface;
+	ctx->listener_manager.cb = on_global_vkman;
+	ctx->listener_manager.data = ctx;
+
+	ret = ufkbd_wl_global_listener_add(ufkbd_wl, &ctx->listener_manager);
+	if (ret)
+		goto err;
+
+	*out = ctx;
+
+	return 0;
+
+err:
+	free(ctx);
+	return ret;
+}
+
+void ufkbd_wl_input_uninit(struct ufkbd_wl_input *ctx)
+{
+	if (ctx->touch != NULL)
+		wl_touch_destroy(ctx->touch);
+
+	if (ctx->pointer != NULL)
+		wl_pointer_destroy(ctx->pointer);
+
+	if (ctx->seat != NULL)
+		wl_seat_destroy(ctx->seat);
+
+	if (ctx->kb != NULL)
+		zwp_virtual_keyboard_v1_destroy(ctx->kb);
+
+	if (ctx->manager != NULL)
+		zwp_virtual_keyboard_manager_v1_destroy(ctx->manager);
+
+	free(ctx);
+}

wayland/protocols/fractional-scale-v1.c

@@ -0,0 +1,73 @@
+/* Generated by wayland-scanner 1.22.0 */
+
+/*
+ * Copyright © 2022 Kenny Levinsen
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a
+ * copy of this software and associated documentation files (the "Software"),
+ * to deal in the Software without restriction, including without limitation
+ * the rights to use, copy, modify, merge, publish, distribute, sublicense,
+ * and/or sell copies of the Software, and to permit persons to whom the
+ * Software is furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice (including the next
+ * paragraph) shall be included in all copies or substantial portions of the
+ * Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
+ * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
+ * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
+ * DEALINGS IN THE SOFTWARE.
+ */
+
+#include <stdlib.h>
+#include <stdint.h>
+#include "wayland-util.h"
+
+#ifndef __has_attribute
+# define __has_attribute(x) 0  /* Compatibility with non-clang compilers. */
+#endif
+
+#if (__has_attribute(visibility) || defined(__GNUC__) && __GNUC__ >= 4)
+#define WL_PRIVATE __attribute__ ((visibility("hidden")))
+#else
+#define WL_PRIVATE
+#endif
+
+extern const struct wl_interface wl_surface_interface;
+extern const struct wl_interface wp_fractional_scale_v1_interface;
+
+static const struct wl_interface *fractional_scale_v1_types[] = {
+	NULL,
+	&wp_fractional_scale_v1_interface,
+	&wl_surface_interface,
+};
+
+static const struct wl_message wp_fractional_scale_manager_v1_requests[] = {
+	{ "destroy", "", fractional_scale_v1_types + 0 },
+	{ "get_fractional_scale", "no", fractional_scale_v1_types + 1 },
+};
+
+WL_PRIVATE const struct wl_interface wp_fractional_scale_manager_v1_interface = {
+	"wp_fractional_scale_manager_v1", 1,
+	2, wp_fractional_scale_manager_v1_requests,
+	0, NULL,
+};
+
+static const struct wl_message wp_fractional_scale_v1_requests[] = {
+	{ "destroy", "", fractional_scale_v1_types + 0 },
+};
+
+static const struct wl_message wp_fractional_scale_v1_events[] = {
+	{ "preferred_scale", "u", fractional_scale_v1_types + 0 },
+};
+
+WL_PRIVATE const struct wl_interface wp_fractional_scale_v1_interface = {
+	"wp_fractional_scale_v1", 1,
+	1, wp_fractional_scale_v1_requests,
+	1, wp_fractional_scale_v1_events,
+};
+

wayland/protocols/input-method-unstable-v2.c

@@ -0,0 +1,132 @@
+/* Generated by wayland-scanner 1.22.0 */
+
+/*
+ * Copyright © 2008-2011 Kristian Høgsberg
+ * Copyright © 2010-2011 Intel Corporation
+ * Copyright © 2012-2013 Collabora, Ltd.
+ * Copyright © 2012, 2013 Intel Corporation
+ * Copyright © 2015, 2016 Jan Arne Petersen
+ * Copyright © 2017, 2018 Red Hat, Inc.
+ * Copyright © 2018       Purism SPC
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a
+ * copy of this software and associated documentation files (the "Software"),
+ * to deal in the Software without restriction, including without limitation
+ * the rights to use, copy, modify, merge, publish, distribute, sublicense,
+ * and/or sell copies of the Software, and to permit persons to whom the
+ * Software is furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice (including the next
+ * paragraph) shall be included in all copies or substantial portions of the
+ * Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
+ * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
+ * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
+ * DEALINGS IN THE SOFTWARE.
+ */
+
+#include <stdlib.h>
+#include <stdint.h>
+#include "wayland-util.h"
+
+#ifndef __has_attribute
+# define __has_attribute(x) 0  /* Compatibility with non-clang compilers. */
+#endif
+
+#if (__has_attribute(visibility) || defined(__GNUC__) && __GNUC__ >= 4)
+#define WL_PRIVATE __attribute__ ((visibility("hidden")))
+#else
+#define WL_PRIVATE
+#endif
+
+extern const struct wl_interface wl_seat_interface;
+extern const struct wl_interface wl_surface_interface;
+extern const struct wl_interface zwp_input_method_keyboard_grab_v2_interface;
+extern const struct wl_interface zwp_input_method_v2_interface;
+extern const struct wl_interface zwp_input_popup_surface_v2_interface;
+
+static const struct wl_interface *input_method_unstable_v2_types[] = {
+	NULL,
+	NULL,
+	NULL,
+	NULL,
+	NULL,
+	&zwp_input_popup_surface_v2_interface,
+	&wl_surface_interface,
+	&zwp_input_method_keyboard_grab_v2_interface,
+	&wl_seat_interface,
+	&zwp_input_method_v2_interface,
+};
+
+static const struct wl_message zwp_input_method_v2_requests[] = {
+	{ "commit_string", "s", input_method_unstable_v2_types + 0 },
+	{ "set_preedit_string", "sii", input_method_unstable_v2_types + 0 },
+	{ "delete_surrounding_text", "uu", input_method_unstable_v2_types + 0 },
+	{ "commit", "u", input_method_unstable_v2_types + 0 },
+	{ "get_input_popup_surface", "no", input_method_unstable_v2_types + 5 },
+	{ "grab_keyboard", "n", input_method_unstable_v2_types + 7 },
+	{ "destroy", "", input_method_unstable_v2_types + 0 },
+};
+
+static const struct wl_message zwp_input_method_v2_events[] = {
+	{ "activate", "", input_method_unstable_v2_types + 0 },
+	{ "deactivate", "", input_method_unstable_v2_types + 0 },
+	{ "surrounding_text", "suu", input_method_unstable_v2_types + 0 },
+	{ "text_change_cause", "u", input_method_unstable_v2_types + 0 },
+	{ "content_type", "uu", input_method_unstable_v2_types + 0 },
+	{ "done", "", input_method_unstable_v2_types + 0 },
+	{ "unavailable", "", input_method_unstable_v2_types + 0 },
+};
+
+WL_PRIVATE const struct wl_interface zwp_input_method_v2_interface = {
+	"zwp_input_method_v2", 1,
+	7, zwp_input_method_v2_requests,
+	7, zwp_input_method_v2_events,
+};
+
+static const struct wl_message zwp_input_popup_surface_v2_requests[] = {
+	{ "destroy", "", input_method_unstable_v2_types + 0 },
+};
+
+static const struct wl_message zwp_input_popup_surface_v2_events[] = {
+	{ "text_input_rectangle", "iiii", input_method_unstable_v2_types + 0 },
+};
+
+WL_PRIVATE const struct wl_interface zwp_input_popup_surface_v2_interface = {
+	"zwp_input_popup_surface_v2", 1,
+	1, zwp_input_popup_surface_v2_requests,
+	1, zwp_input_popup_surface_v2_events,
+};
+
+static const struct wl_message zwp_input_method_keyboard_grab_v2_requests[] = {
+	{ "release", "", input_method_unstable_v2_types + 0 },
+};
+
+static const struct wl_message zwp_input_method_keyboard_grab_v2_events[] = {
+	{ "keymap", "uhu", input_method_unstable_v2_types + 0 },
+	{ "key", "uuuu", input_method_unstable_v2_types + 0 },
+	{ "modifiers", "uuuuu", input_method_unstable_v2_types + 0 },
+	{ "repeat_info", "ii", input_method_unstable_v2_types + 0 },
+};
+
+WL_PRIVATE const struct wl_interface zwp_input_method_keyboard_grab_v2_interface = {
+	"zwp_input_method_keyboard_grab_v2", 1,
+	1, zwp_input_method_keyboard_grab_v2_requests,
+	4, zwp_input_method_keyboard_grab_v2_events,
+};
+
+static const struct wl_message zwp_input_method_manager_v2_requests[] = {
+	{ "get_input_method", "on", input_method_unstable_v2_types + 8 },
+	{ "destroy", "", input_method_unstable_v2_types + 0 },
+};
+
+WL_PRIVATE const struct wl_interface zwp_input_method_manager_v2_interface = {
+	"zwp_input_method_manager_v2", 1,
+	2, zwp_input_method_manager_v2_requests,
+	0, NULL,
+};
+

wayland/protocols/input-method-unstable-v2.xml

@@ -0,0 +1,493 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<protocol name="input_method_unstable_v2">
+
+  <copyright>
+    Copyright © 2008-2011 Kristian Høgsberg
+    Copyright © 2010-2011 Intel Corporation
+    Copyright © 2012-2013 Collabora, Ltd.
+    Copyright © 2012, 2013 Intel Corporation
+    Copyright © 2015, 2016 Jan Arne Petersen
+    Copyright © 2017, 2018 Red Hat, Inc.
+    Copyright © 2018       Purism SPC
+
+    Permission is hereby granted, free of charge, to any person obtaining a
+    copy of this software and associated documentation files (the "Software"),
+    to deal in the Software without restriction, including without limitation
+    the rights to use, copy, modify, merge, publish, distribute, sublicense,
+    and/or sell copies of the Software, and to permit persons to whom the
+    Software is furnished to do so, subject to the following conditions:
+
+    The above copyright notice and this permission notice (including the next
+    paragraph) shall be included in all copies or substantial portions of the
+    Software.
+
+    THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+    IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+    FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
+    THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+    LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
+    FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
+    DEALINGS IN THE SOFTWARE.
+  </copyright>
+
+  <description summary="Protocol for creating input methods">
+    This protocol allows applications to act as input methods for compositors.
+
+    An input method context is used to manage the state of the input method.
+
+    Text strings are UTF-8 encoded, their indices and lengths are in bytes.
+
+    This document adheres to the RFC 2119 when using words like "must",
+    "should", "may", etc.
+
+    Warning! The protocol described in this file is experimental and
+    backward incompatible changes may be made. Backward compatible changes
+    may be added together with the corresponding interface version bump.
+    Backward incompatible changes are done by bumping the version number in
+    the protocol and interface names and resetting the interface version.
+    Once the protocol is to be declared stable, the 'z' prefix and the
+    version number in the protocol and interface names are removed and the
+    interface version number is reset.
+
+    This protocol is copied from the Squeekboard and should be brought
+    up-to-date with it whenever upstream changes.
+  </description>
+
+  <interface name="zwp_input_method_v2" version="1">
+    <description summary="input method">
+      An input method object allows for clients to compose text.
+
+      The objects connects the client to a text input in an application, and
+      lets the client to serve as an input method for a seat.
+
+      The zwp_input_method_v2 object can occupy two distinct states: active and
+      inactive. In the active state, the object is associated to and
+      communicates with a text input. In the inactive state, there is no
+      associated text input, and the only communication is with the compositor.
+      Initially, the input method is in the inactive state.
+
+      Requests issued in the inactive state must be accepted by the compositor.
+      Because of the serial mechanism, and the state reset on activate event,
+      they will not have any effect on the state of the next text input.
+
+      There must be no more than one input method object per seat.
+    </description>
+
+    <event name="activate">
+      <description summary="input method has been requested">
+        Notification that a text input focused on this seat requested the input
+        method to be activated.
+
+        This event serves the purpose of providing the compositor with an
+        active input method.
+
+        This event resets all state associated with previous enable, disable,
+        surrounding_text, text_change_cause, and content_type events, as well
+        as the state associated with set_preedit_string, commit_string, and
+        delete_surrounding_text requests. In addition, it marks the
+        zwp_input_method_v2 object as active, and makes any existing
+        zwp_input_popup_surface_v2 objects visible.
+
+        The surrounding_text, and content_type events must follow before the
+        next done event if the text input supports the respective
+        functionality.
+
+        State set with this event is double-buffered. It will get applied on
+        the next zwp_input_method_v2.done event, and stay valid until changed.
+      </description>
+    </event>
+
+    <event name="deactivate">
+      <description summary="deactivate event">
+        Notification that no focused text input currently needs an active 
+        input method on this seat.
+
+        This event marks the zwp_input_method_v2 object as inactive. The
+        compositor must make all existing zwp_input_popup_surface_v2 objects
+        invisible until the next activate event.
+
+        State set with this event is double-buffered. It will get applied on
+        the next zwp_input_method_v2.done event, and stay valid until changed.
+      </description>
+    </event>
+
+    <event name="surrounding_text">
+      <description summary="surrounding text event">
+        Updates the surrounding plain text around the cursor, excluding the
+        preedit text.
+
+        If any preedit text is present, it is replaced with the cursor for the
+        purpose of this event.
+
+        The argument text is a buffer containing the preedit string, and must
+        include the cursor position, and the complete selection. It should
+        contain additional characters before and after these. There is a
+        maximum length of wayland messages, so text can not be longer than 4000
+        bytes.
+
+        cursor is the byte offset of the cursor within the text buffer.
+
+        anchor is the byte offset of the selection anchor within the text
+        buffer. If there is no selected text, anchor must be the same as
+        cursor.
+
+        If this event does not arrive before the first done event, the input
+        method may assume that the text input does not support this
+        functionality and ignore following surrounding_text events.
+
+        Values set with this event are double-buffered. They will get applied
+        and set to initial values on the next zwp_input_method_v2.done
+        event.
+
+        The initial state for affected fields is empty, meaning that the text
+        input does not support sending surrounding text. If the empty values
+        get applied, subsequent attempts to change them may have no effect.
+      </description>
+      <arg name="text" type="string"/>
+      <arg name="cursor" type="uint"/>
+      <arg name="anchor" type="uint"/>
+    </event>
+
+    <event name="text_change_cause">
+      <description summary="indicates the cause of surrounding text change">
+        Tells the input method why the text surrounding the cursor changed.
+
+        Whenever the client detects an external change in text, cursor, or
+        anchor position, it must issue this request to the compositor. This
+        request is intended to give the input method a chance to update the
+        preedit text in an appropriate way, e.g. by removing it when the user
+        starts typing with a keyboard.
+
+        cause describes the source of the change.
+
+        The value set with this event is double-buffered. It will get applied
+        and set to its initial value on the next zwp_input_method_v2.done
+        event.
+
+        The initial value of cause is input_method.
+      </description>
+      <arg name="cause" type="uint" enum="zwp_text_input_v3.change_cause"/>
+    </event>
+
+    <event name="content_type">
+      <description summary="content purpose and hint">
+        Indicates the content type and hint for the current
+        zwp_input_method_v2 instance.
+
+        Values set with this event are double-buffered. They will get applied
+        on the next zwp_input_method_v2.done event.
+
+        The initial value for hint is none, and the initial value for purpose
+        is normal.
+      </description>
+      <arg name="hint" type="uint" enum="zwp_text_input_v3.content_hint"/>
+      <arg name="purpose" type="uint" enum="zwp_text_input_v3.content_purpose"/>
+    </event>
+
+    <event name="done">
+      <description summary="apply state">
+        Atomically applies state changes recently sent to the client.
+
+        The done event establishes and updates the state of the client, and
+        must be issued after any changes to apply them.
+
+        Text input state (content purpose, content hint, surrounding text, and
+        change cause) is conceptually double-buffered within an input method
+        context.
+
+        Events modify the pending state, as opposed to the current state in use
+        by the input method. A done event atomically applies all pending state,
+        replacing the current state. After done, the new pending state is as
+        documented for each related request.
+
+        Events must be applied in the order of arrival.
+
+        Neither current nor pending state are modified unless noted otherwise.
+      </description>
+    </event>
+
+    <request name="commit_string">
+      <description summary="commit string">
+        Send the commit string text for insertion to the application.
+
+        Inserts a string at current cursor position (see commit event
+        sequence). The string to commit could be either just a single character
+        after a key press or the result of some composing.
+
+        The argument text is a buffer containing the string to insert. There is
+        a maximum length of wayland messages, so text can not be longer than
+        4000 bytes.
+
+        Values set with this event are double-buffered. They must be applied
+        and reset to initial on the next zwp_text_input_v3.commit request.
+
+        The initial value of text is an empty string.
+      </description>
+      <arg name="text" type="string"/>
+    </request>
+
+    <request name="set_preedit_string">
+      <description summary="pre-edit string">
+        Send the pre-edit string text to the application text input.
+
+        Place a new composing text (pre-edit) at the current cursor position.
+        Any previously set composing text must be removed. Any previously
+        existing selected text must be removed. The cursor is moved to a new
+        position within the preedit string.
+
+        The argument text is a buffer containing the preedit string. There is
+        a maximum length of wayland messages, so text can not be longer than
+        4000 bytes.
+
+        The arguments cursor_begin and cursor_end are counted in bytes relative
+        to the beginning of the submitted string buffer. Cursor should be
+        hidden by the text input when both are equal to -1.
+
+        cursor_begin indicates the beginning of the cursor. cursor_end
+        indicates the end of the cursor. It may be equal or different than
+        cursor_begin.
+
+        Values set with this event are double-buffered. They must be applied on
+        the next zwp_input_method_v2.commit event.
+
+        The initial value of text is an empty string. The initial value of
+        cursor_begin, and cursor_end are both 0.
+      </description>
+      <arg name="text" type="string"/>
+      <arg name="cursor_begin" type="int"/>
+      <arg name="cursor_end" type="int"/>
+    </request>
+
+    <request name="delete_surrounding_text">
+      <description summary="delete text">
+        Remove the surrounding text.
+
+        before_length and after_length are the number of bytes before and after
+        the current cursor index (excluding the preedit text) to delete.
+
+        If any preedit text is present, it is replaced with the cursor for the
+        purpose of this event. In effect before_length is counted from the
+        beginning of preedit text, and after_length from its end (see commit
+        event sequence).
+
+        Values set with this event are double-buffered. They must be applied
+        and reset to initial on the next zwp_input_method_v2.commit request.
+
+        The initial values of both before_length and after_length are 0.
+      </description>
+      <arg name="before_length" type="uint"/>
+      <arg name="after_length" type="uint"/>
+    </request>
+
+    <request name="commit">
+      <description summary="apply state">
+        Apply state changes from commit_string, set_preedit_string and
+        delete_surrounding_text requests.
+
+        The state relating to these events is double-buffered, and each one
+        modifies the pending state. This request replaces the current state
+        with the pending state.
+
+        The connected text input is expected to proceed by evaluating the
+        changes in the following order:
+
+        1. Replace existing preedit string with the cursor.
+        2. Delete requested surrounding text.
+        3. Insert commit string with the cursor at its end.
+        4. Calculate surrounding text to send.
+        5. Insert new preedit text in cursor position.
+        6. Place cursor inside preedit text.
+
+        The serial number reflects the last state of the zwp_input_method_v2
+        object known to the client. The value of the serial argument must be
+        equal to the number of done events already issued by that object. When
+        the compositor receives a commit request with a serial different than
+        the number of past done events, it must proceed as normal, except it
+        should not change the current state of the zwp_input_method_v2 object.
+      </description>
+      <arg name="serial" type="uint"/>
+    </request>
+
+    <request name="get_input_popup_surface">
+      <description summary="create popup surface">
+        Creates a new zwp_input_popup_surface_v2 object wrapping a given
+        surface.
+
+        The surface gets assigned the "input_popup" role. If the surface
+        already has an assigned role, the compositor must issue a protocol
+        error.
+      </description>
+      <arg name="id" type="new_id" interface="zwp_input_popup_surface_v2"/>
+      <arg name="surface" type="object" interface="wl_surface"/>
+    </request>
+
+    <request name="grab_keyboard">
+      <description summary="grab hardware keyboard">
+        Allow an input method to receive hardware keyboard input and process
+        key events to generate text events (with pre-edit) over the wire. This
+        allows input methods which compose multiple key events for inputting
+        text like it is done for CJK languages.
+
+        The compositor should send all keyboard events on the seat to the grab
+        holder via the returned wl_keyboard object. Nevertheless, the
+        compositor may decide not to forward any particular event. The
+        compositor must not further process any event after it has been
+        forwarded to the grab holder.
+
+        Releasing the resulting wl_keyboard object releases the grab.
+      </description>
+      <arg name="keyboard" type="new_id"
+        interface="zwp_input_method_keyboard_grab_v2"/>
+    </request>
+
+    <event name="unavailable">
+      <description summary="input method unavailable">
+        The input method ceased to be available.
+
+        The compositor must issue this event as the only event on the object if
+        there was another input_method object associated with the same seat at
+        the time of its creation.
+
+        The compositor must issue this request when the object is no longer
+        useable, e.g. due to seat removal.
+
+        The input method context becomes inert and should be destroyed after
+        deactivation is handled. Any further requests and events except for the
+        destroy request must be ignored.
+      </description>
+    </event>
+
+    <request name="destroy" type="destructor">
+      <description summary="destroy the text input">
+        Destroys the zwp_text_input_v2 object and any associated child
+        objects, i.e. zwp_input_popup_surface_v2 and
+        zwp_input_method_keyboard_grab_v2.
+      </description>
+    </request>
+  </interface>
+
+  <interface name="zwp_input_popup_surface_v2" version="1">
+    <description summary="popup surface">
+      This interface marks a surface as a popup for interacting with an input
+      method.
+
+      The compositor should place it near the active text input area. It must
+      be visible if and only if the input method is in the active state.
+
+      The client must not destroy the underlying wl_surface while the
+      zwp_input_popup_surface_v2 object exists.
+    </description>
+
+    <event name="text_input_rectangle">
+      <description summary="set text input area position">
+        Notify about the position of the area of the text input expressed as a
+        rectangle in surface local coordinates.
+
+        This is a hint to the input method telling it the relative position of
+        the text being entered.
+      </description>
+      <arg name="x" type="int"/>
+      <arg name="y" type="int"/>
+      <arg name="width" type="int"/>
+      <arg name="height" type="int"/>
+    </event>
+
+    <request name="destroy" type="destructor"/>
+  </interface>
+
+  <interface name="zwp_input_method_keyboard_grab_v2" version="1">
+    <!-- Closely follows wl_keyboard version 6 -->
+    <description summary="keyboard grab">
+      The zwp_input_method_keyboard_grab_v2 interface represents an exclusive
+      grab of the wl_keyboard interface associated with the seat.
+    </description>
+
+    <event name="keymap">
+      <description summary="keyboard mapping">
+        This event provides a file descriptor to the client which can be
+        memory-mapped to provide a keyboard mapping description.
+      </description>
+      <arg name="format" type="uint" enum="wl_keyboard.keymap_format"
+        summary="keymap format"/>
+      <arg name="fd" type="fd" summary="keymap file descriptor"/>
+      <arg name="size" type="uint" summary="keymap size, in bytes"/>
+    </event>
+
+    <event name="key">
+      <description summary="key event">
+        A key was pressed or released.
+        The time argument is a timestamp with millisecond granularity, with an
+        undefined base.
+      </description>
+      <arg name="serial" type="uint" summary="serial number of the key event"/>
+      <arg name="time" type="uint" summary="timestamp with millisecond granularity"/>
+      <arg name="key" type="uint" summary="key that produced the event"/>
+      <arg name="state" type="uint" enum="wl_keyboard.key_state"
+        summary="physical state of the key"/>
+    </event>
+
+    <event name="modifiers">
+      <description summary="modifier and group state">
+        Notifies clients that the modifier and/or group state has changed, and
+        it should update its local state.
+      </description>
+      <arg name="serial" type="uint" summary="serial number of the modifiers event"/>
+      <arg name="mods_depressed" type="uint" summary="depressed modifiers"/>
+      <arg name="mods_latched" type="uint" summary="latched modifiers"/>
+      <arg name="mods_locked" type="uint" summary="locked modifiers"/>
+      <arg name="group" type="uint" summary="keyboard layout"/>
+    </event>
+
+    <request name="release" type="destructor">
+      <description summary="release the grab object"/>
+    </request>
+
+    <event name="repeat_info">
+      <description summary="repeat rate and delay">
+        Informs the client about the keyboard's repeat rate and delay.
+
+        This event is sent as soon as the zwp_input_method_keyboard_grab_v2
+        object has been created, and is guaranteed to be received by the
+        client before any key press event.
+
+        Negative values for either rate or delay are illegal. A rate of zero
+        will disable any repeating (regardless of the value of delay).
+
+        This event can be sent later on as well with a new value if necessary,
+        so clients should continue listening for the event past the creation
+        of zwp_input_method_keyboard_grab_v2.
+      </description>
+      <arg name="rate" type="int"
+	   summary="the rate of repeating keys in characters per second"/>
+      <arg name="delay" type="int"
+	   summary="delay in milliseconds since key down until repeating starts"/>
+    </event>
+  </interface>
+
+  <interface name="zwp_input_method_manager_v2" version="1">
+    <description summary="input method manager">
+      The input method manager allows the client to become the input method on
+      a chosen seat.
+
+      No more than one input method must be associated with any seat at any
+      given time.
+    </description>
+
+    <request name="get_input_method">
+      <description summary="request an input method object">
+        Request a new input zwp_input_method_v2 object associated with a given
+        seat.
+      </description>
+      <arg name="seat" type="object" interface="wl_seat"/>
+      <arg name="input_method" type="new_id" interface="zwp_input_method_v2"/>
+    </request>
+
+    <request name="destroy" type="destructor">
+      <description summary="destroy the input method manager">
+        Destroys the zwp_input_method_manager_v2 object.
+
+        The zwp_input_method_v2 objects originating from it remain valid.
+      </description>
+    </request>
+  </interface>
+</protocol>

wayland/protocols/viewporter.c

@@ -0,0 +1,74 @@
+/* Generated by wayland-scanner 1.22.0 */
+
+/*
+ * Copyright © 2013-2016 Collabora, Ltd.
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a
+ * copy of this software and associated documentation files (the "Software"),
+ * to deal in the Software without restriction, including without limitation
+ * the rights to use, copy, modify, merge, publish, distribute, sublicense,
+ * and/or sell copies of the Software, and to permit persons to whom the
+ * Software is furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice (including the next
+ * paragraph) shall be included in all copies or substantial portions of the
+ * Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
+ * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
+ * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
+ * DEALINGS IN THE SOFTWARE.
+ */
+
+#include <stdlib.h>
+#include <stdint.h>
+#include "wayland-util.h"
+
+#ifndef __has_attribute
+# define __has_attribute(x) 0  /* Compatibility with non-clang compilers. */
+#endif
+
+#if (__has_attribute(visibility) || defined(__GNUC__) && __GNUC__ >= 4)
+#define WL_PRIVATE __attribute__ ((visibility("hidden")))
+#else
+#define WL_PRIVATE
+#endif
+
+extern const struct wl_interface wl_surface_interface;
+extern const struct wl_interface wp_viewport_interface;
+
+static const struct wl_interface *viewporter_types[] = {
+	NULL,
+	NULL,
+	NULL,
+	NULL,
+	&wp_viewport_interface,
+	&wl_surface_interface,
+};
+
+static const struct wl_message wp_viewporter_requests[] = {
+	{ "destroy", "", viewporter_types + 0 },
+	{ "get_viewport", "no", viewporter_types + 4 },
+};
+
+WL_PRIVATE const struct wl_interface wp_viewporter_interface = {
+	"wp_viewporter", 1,
+	2, wp_viewporter_requests,
+	0, NULL,
+};
+
+static const struct wl_message wp_viewport_requests[] = {
+	{ "destroy", "", viewporter_types + 0 },
+	{ "set_source", "ffff", viewporter_types + 0 },
+	{ "set_destination", "ii", viewporter_types + 0 },
+};
+
+WL_PRIVATE const struct wl_interface wp_viewport_interface = {
+	"wp_viewport", 1,
+	3, wp_viewport_requests,
+	0, NULL,
+};
+

wayland/protocols/virtual-keyboard-unstable-v1.c

@@ -0,0 +1,77 @@
+/* Generated by wayland-scanner 1.22.0 */
+
+/*
+ * Copyright © 2008-2011  Kristian Høgsberg
+ * Copyright © 2010-2013  Intel Corporation
+ * Copyright © 2012-2013  Collabora, Ltd.
+ * Copyright © 2018       Purism SPC
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a
+ * copy of this software and associated documentation files (the "Software"),
+ * to deal in the Software without restriction, including without limitation
+ * the rights to use, copy, modify, merge, publish, distribute, sublicense,
+ * and/or sell copies of the Software, and to permit persons to whom the
+ * Software is furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice (including the next
+ * paragraph) shall be included in all copies or substantial portions of the
+ * Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
+ * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
+ * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
+ * DEALINGS IN THE SOFTWARE.
+ */
+
+#include <stdlib.h>
+#include <stdint.h>
+#include "wayland-util.h"
+
+#ifndef __has_attribute
+# define __has_attribute(x) 0  /* Compatibility with non-clang compilers. */
+#endif
+
+#if (__has_attribute(visibility) || defined(__GNUC__) && __GNUC__ >= 4)
+#define WL_PRIVATE __attribute__ ((visibility("hidden")))
+#else
+#define WL_PRIVATE
+#endif
+
+extern const struct wl_interface wl_seat_interface;
+extern const struct wl_interface zwp_virtual_keyboard_v1_interface;
+
+static const struct wl_interface *virtual_keyboard_unstable_v1_types[] = {
+	NULL,
+	NULL,
+	NULL,
+	NULL,
+	&wl_seat_interface,
+	&zwp_virtual_keyboard_v1_interface,
+};
+
+static const struct wl_message zwp_virtual_keyboard_v1_requests[] = {
+	{ "keymap", "uhu", virtual_keyboard_unstable_v1_types + 0 },
+	{ "key", "uuu", virtual_keyboard_unstable_v1_types + 0 },
+	{ "modifiers", "uuuu", virtual_keyboard_unstable_v1_types + 0 },
+	{ "destroy", "", virtual_keyboard_unstable_v1_types + 0 },
+};
+
+WL_PRIVATE const struct wl_interface zwp_virtual_keyboard_v1_interface = {
+	"zwp_virtual_keyboard_v1", 1,
+	4, zwp_virtual_keyboard_v1_requests,
+	0, NULL,
+};
+
+static const struct wl_message zwp_virtual_keyboard_manager_v1_requests[] = {
+	{ "create_virtual_keyboard", "on", virtual_keyboard_unstable_v1_types + 4 },
+};
+
+WL_PRIVATE const struct wl_interface zwp_virtual_keyboard_manager_v1_interface = {
+	"zwp_virtual_keyboard_manager_v1", 1,
+	1, zwp_virtual_keyboard_manager_v1_requests,
+	0, NULL,
+};
+

wayland/protocols/virtual-keyboard-unstable-v1.xml

@@ -0,0 +1,118 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<protocol name="virtual_keyboard_unstable_v1">
+  <copyright>
+    Copyright © 2008-2011  Kristian Høgsberg
+    Copyright © 2010-2013  Intel Corporation
+    Copyright © 2012-2013  Collabora, Ltd.
+    Copyright © 2018       Purism SPC
+
+    Permission is hereby granted, free of charge, to any person obtaining a
+    copy of this software and associated documentation files (the "Software"),
+    to deal in the Software without restriction, including without limitation
+    the rights to use, copy, modify, merge, publish, distribute, sublicense,
+    and/or sell copies of the Software, and to permit persons to whom the
+    Software is furnished to do so, subject to the following conditions:
+
+    The above copyright notice and this permission notice (including the next
+    paragraph) shall be included in all copies or substantial portions of the
+    Software.
+
+    THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+    IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+    FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
+    THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+    LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
+    FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
+    DEALINGS IN THE SOFTWARE.
+  </copyright>
+
+  <description>
+    This protocol is copied from the Squeekboard and should be brought
+    up-to-date with it whenever upstream changes.
+  </description>
+
+  <interface name="zwp_virtual_keyboard_v1" version="1">
+    <description summary="virtual keyboard">
+      The virtual keyboard provides an application with requests which emulate
+      the behaviour of a physical keyboard.
+
+      This interface can be used by clients on its own to provide raw input
+      events, or it can accompany the input method protocol.
+    </description>
+
+    <request name="keymap">
+      <description summary="keyboard mapping">
+        Provide a file descriptor to the compositor which can be
+        memory-mapped to provide a keyboard mapping description.
+
+        Format carries a value from the keymap_format enumeration.
+      </description>
+      <arg name="format" type="uint" summary="keymap format"/>
+      <arg name="fd" type="fd" summary="keymap file descriptor"/>
+      <arg name="size" type="uint" summary="keymap size, in bytes"/>
+    </request>
+    
+    <enum name="error">
+      <entry name="no_keymap" value="0" summary="No keymap was set"/>
+    </enum>
+
+    <request name="key">
+      <description summary="key event">
+        A key was pressed or released.
+        The time argument is a timestamp with millisecond granularity, with an
+        undefined base. All requests regarding a single object must share the
+        same clock.
+
+        Keymap must be set before issuing this request.
+
+        State carries a value from the key_state enumeration.
+      </description>
+      <arg name="time" type="uint" summary="timestamp with millisecond granularity"/>
+      <arg name="key" type="uint" summary="key that produced the event"/>
+      <arg name="state" type="uint" summary="physical state of the key"/>
+    </request>
+
+    <request name="modifiers">
+      <description summary="modifier and group state">
+        Notifies the compositor that the modifier and/or group state has
+        changed, and it should update state.
+
+        The client should use wl_keyboard.modifiers event to synchronize its
+        internal state with seat state.
+
+        Keymap must be set before issuing this request.
+      </description>
+      <arg name="mods_depressed" type="uint" summary="depressed modifiers"/>
+      <arg name="mods_latched" type="uint" summary="latched modifiers"/>
+      <arg name="mods_locked" type="uint" summary="locked modifiers"/>
+      <arg name="group" type="uint" summary="keyboard layout"/>
+    </request>
+
+    <request name="destroy" type="destructor" since="1">
+      <description summary="destroy the virtual keyboard keyboard object"/>
+    </request>
+  </interface>
+
+  <interface name="zwp_virtual_keyboard_manager_v1" version="1">
+    <description summary="virtual keyboard manager">
+      A virtual keyboard manager allows an application to provide keyboard
+      input events as if they came from a physical keyboard.
+    </description>
+
+    <enum name="error">
+      <entry name="unauthorized" value="0" summary="client not authorized to use the interface"/>
+    </enum>
+
+    <request name="create_virtual_keyboard">
+      <description summary="Create a new virtual keyboard">
+        Creates a new virtual keyboard associated to a seat.
+
+        If the compositor enables a keyboard to perform arbitrary actions, it
+        should present an error when an untrusted client requests a new
+        keyboard.
+      </description>
+      <arg name="seat" type="object" interface="wl_seat"/>
+      <arg name="id" type="new_id" interface="zwp_virtual_keyboard_v1"/>
+    </request>
+  </interface>
+</protocol>

wayland/protocols/wlr-layer-shell-unstable-v1.c

@@ -0,0 +1,93 @@
+/* Generated by wayland-scanner 1.22.0 */
+
+/*
+ * Copyright © 2017 Drew DeVault
+ *
+ * Permission to use, copy, modify, distribute, and sell this
+ * software and its documentation for any purpose is hereby granted
+ * without fee, provided that the above copyright notice appear in
+ * all copies and that both that copyright notice and this permission
+ * notice appear in supporting documentation, and that the name of
+ * the copyright holders not be used in advertising or publicity
+ * pertaining to distribution of the software without specific,
+ * written prior permission.  The copyright holders make no
+ * representations about the suitability of this software for any
+ * purpose.  It is provided "as is" without express or implied
+ * warranty.
+ *
+ * THE COPYRIGHT HOLDERS DISCLAIM ALL WARRANTIES WITH REGARD TO THIS
+ * SOFTWARE, INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND
+ * FITNESS, IN NO EVENT SHALL THE COPYRIGHT HOLDERS BE LIABLE FOR ANY
+ * SPECIAL, INDIRECT OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
+ * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN
+ * AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION,
+ * ARISING OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF
+ * THIS SOFTWARE.
+ */
+
+#include <stdlib.h>
+#include <stdint.h>
+#include "wayland-util.h"
+
+#ifndef __has_attribute
+# define __has_attribute(x) 0  /* Compatibility with non-clang compilers. */
+#endif
+
+#if (__has_attribute(visibility) || defined(__GNUC__) && __GNUC__ >= 4)
+#define WL_PRIVATE __attribute__ ((visibility("hidden")))
+#else
+#define WL_PRIVATE
+#endif
+
+extern const struct wl_interface wl_output_interface;
+extern const struct wl_interface wl_surface_interface;
+extern const struct wl_interface xdg_popup_interface;
+extern const struct wl_interface zwlr_layer_surface_v1_interface;
+
+static const struct wl_interface *wlr_layer_shell_unstable_v1_types[] = {
+	NULL,
+	NULL,
+	NULL,
+	NULL,
+	&zwlr_layer_surface_v1_interface,
+	&wl_surface_interface,
+	&wl_output_interface,
+	NULL,
+	NULL,
+	&xdg_popup_interface,
+};
+
+static const struct wl_message zwlr_layer_shell_v1_requests[] = {
+	{ "get_layer_surface", "no?ous", wlr_layer_shell_unstable_v1_types + 4 },
+	{ "destroy", "3", wlr_layer_shell_unstable_v1_types + 0 },
+};
+
+WL_PRIVATE const struct wl_interface zwlr_layer_shell_v1_interface = {
+	"zwlr_layer_shell_v1", 4,
+	2, zwlr_layer_shell_v1_requests,
+	0, NULL,
+};
+
+static const struct wl_message zwlr_layer_surface_v1_requests[] = {
+	{ "set_size", "uu", wlr_layer_shell_unstable_v1_types + 0 },
+	{ "set_anchor", "u", wlr_layer_shell_unstable_v1_types + 0 },
+	{ "set_exclusive_zone", "i", wlr_layer_shell_unstable_v1_types + 0 },
+	{ "set_margin", "iiii", wlr_layer_shell_unstable_v1_types + 0 },
+	{ "set_keyboard_interactivity", "u", wlr_layer_shell_unstable_v1_types + 0 },
+	{ "get_popup", "o", wlr_layer_shell_unstable_v1_types + 9 },
+	{ "ack_configure", "u", wlr_layer_shell_unstable_v1_types + 0 },
+	{ "destroy", "", wlr_layer_shell_unstable_v1_types + 0 },
+	{ "set_layer", "2u", wlr_layer_shell_unstable_v1_types + 0 },
+};
+
+static const struct wl_message zwlr_layer_surface_v1_events[] = {
+	{ "configure", "uuu", wlr_layer_shell_unstable_v1_types + 0 },
+	{ "closed", "", wlr_layer_shell_unstable_v1_types + 0 },
+};
+
+WL_PRIVATE const struct wl_interface zwlr_layer_surface_v1_interface = {
+	"zwlr_layer_surface_v1", 4,
+	9, zwlr_layer_surface_v1_requests,
+	2, zwlr_layer_surface_v1_events,
+};
+

wayland/protocols/wlr-layer-shell-unstable-v1.xml

@@ -0,0 +1,390 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<protocol name="wlr_layer_shell_unstable_v1">
+  <copyright>
+    Copyright © 2017 Drew DeVault
+
+    Permission to use, copy, modify, distribute, and sell this
+    software and its documentation for any purpose is hereby granted
+    without fee, provided that the above copyright notice appear in
+    all copies and that both that copyright notice and this permission
+    notice appear in supporting documentation, and that the name of
+    the copyright holders not be used in advertising or publicity
+    pertaining to distribution of the software without specific,
+    written prior permission.  The copyright holders make no
+    representations about the suitability of this software for any
+    purpose.  It is provided "as is" without express or implied
+    warranty.
+
+    THE COPYRIGHT HOLDERS DISCLAIM ALL WARRANTIES WITH REGARD TO THIS
+    SOFTWARE, INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND
+    FITNESS, IN NO EVENT SHALL THE COPYRIGHT HOLDERS BE LIABLE FOR ANY
+    SPECIAL, INDIRECT OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
+    WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN
+    AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION,
+    ARISING OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF
+    THIS SOFTWARE.
+  </copyright>
+
+  <interface name="zwlr_layer_shell_v1" version="4">
+    <description summary="create surfaces that are layers of the desktop">
+      Clients can use this interface to assign the surface_layer role to
+      wl_surfaces. Such surfaces are assigned to a "layer" of the output and
+      rendered with a defined z-depth respective to each other. They may also be
+      anchored to the edges and corners of a screen and specify input handling
+      semantics. This interface should be suitable for the implementation of
+      many desktop shell components, and a broad number of other applications
+      that interact with the desktop.
+    </description>
+
+    <request name="get_layer_surface">
+      <description summary="create a layer_surface from a surface">
+        Create a layer surface for an existing surface. This assigns the role of
+        layer_surface, or raises a protocol error if another role is already
+        assigned.
+
+        Creating a layer surface from a wl_surface which has a buffer attached
+        or committed is a client error, and any attempts by a client to attach
+        or manipulate a buffer prior to the first layer_surface.configure call
+        must also be treated as errors.
+
+        After creating a layer_surface object and setting it up, the client
+        must perform an initial commit without any buffer attached.
+        The compositor will reply with a layer_surface.configure event.
+        The client must acknowledge it and is then allowed to attach a buffer
+        to map the surface.
+
+        You may pass NULL for output to allow the compositor to decide which
+        output to use. Generally this will be the one that the user most
+        recently interacted with.
+
+        Clients can specify a namespace that defines the purpose of the layer
+        surface.
+      </description>
+      <arg name="id" type="new_id" interface="zwlr_layer_surface_v1"/>
+      <arg name="surface" type="object" interface="wl_surface"/>
+      <arg name="output" type="object" interface="wl_output" allow-null="true"/>
+      <arg name="layer" type="uint" enum="layer" summary="layer to add this surface to"/>
+      <arg name="namespace" type="string" summary="namespace for the layer surface"/>
+    </request>
+
+    <enum name="error">
+      <entry name="role" value="0" summary="wl_surface has another role"/>
+      <entry name="invalid_layer" value="1" summary="layer value is invalid"/>
+      <entry name="already_constructed" value="2" summary="wl_surface has a buffer attached or committed"/>
+    </enum>
+
+    <enum name="layer">
+      <description summary="available layers for surfaces">
+        These values indicate which layers a surface can be rendered in. They
+        are ordered by z depth, bottom-most first. Traditional shell surfaces
+        will typically be rendered between the bottom and top layers.
+        Fullscreen shell surfaces are typically rendered at the top layer.
+        Multiple surfaces can share a single layer, and ordering within a
+        single layer is undefined.
+      </description>
+
+      <entry name="background" value="0"/>
+      <entry name="bottom" value="1"/>
+      <entry name="top" value="2"/>
+      <entry name="overlay" value="3"/>
+    </enum>
+
+    <!-- Version 3 additions -->
+
+    <request name="destroy" type="destructor" since="3">
+      <description summary="destroy the layer_shell object">
+        This request indicates that the client will not use the layer_shell
+        object any more. Objects that have been created through this instance
+        are not affected.
+      </description>
+    </request>
+  </interface>
+
+  <interface name="zwlr_layer_surface_v1" version="4">
+    <description summary="layer metadata interface">
+      An interface that may be implemented by a wl_surface, for surfaces that
+      are designed to be rendered as a layer of a stacked desktop-like
+      environment.
+
+      Layer surface state (layer, size, anchor, exclusive zone,
+      margin, interactivity) is double-buffered, and will be applied at the
+      time wl_surface.commit of the corresponding wl_surface is called.
+
+      Attaching a null buffer to a layer surface unmaps it.
+
+      Unmapping a layer_surface means that the surface cannot be shown by the
+      compositor until it is explicitly mapped again. The layer_surface
+      returns to the state it had right after layer_shell.get_layer_surface.
+      The client can re-map the surface by performing a commit without any
+      buffer attached, waiting for a configure event and handling it as usual.
+    </description>
+
+    <request name="set_size">
+      <description summary="sets the size of the surface">
+        Sets the size of the surface in surface-local coordinates. The
+        compositor will display the surface centered with respect to its
+        anchors.
+
+        If you pass 0 for either value, the compositor will assign it and
+        inform you of the assignment in the configure event. You must set your
+        anchor to opposite edges in the dimensions you omit; not doing so is a
+        protocol error. Both values are 0 by default.
+
+        Size is double-buffered, see wl_surface.commit.
+      </description>
+      <arg name="width" type="uint"/>
+      <arg name="height" type="uint"/>
+    </request>
+
+    <request name="set_anchor">
+      <description summary="configures the anchor point of the surface">
+        Requests that the compositor anchor the surface to the specified edges
+        and corners. If two orthogonal edges are specified (e.g. 'top' and
+        'left'), then the anchor point will be the intersection of the edges
+        (e.g. the top left corner of the output); otherwise the anchor point
+        will be centered on that edge, or in the center if none is specified.
+
+        Anchor is double-buffered, see wl_surface.commit.
+      </description>
+      <arg name="anchor" type="uint" enum="anchor"/>
+    </request>
+
+    <request name="set_exclusive_zone">
+      <description summary="configures the exclusive geometry of this surface">
+        Requests that the compositor avoids occluding an area with other
+        surfaces. The compositor's use of this information is
+        implementation-dependent - do not assume that this region will not
+        actually be occluded.
+
+        A positive value is only meaningful if the surface is anchored to one
+        edge or an edge and both perpendicular edges. If the surface is not
+        anchored, anchored to only two perpendicular edges (a corner), anchored
+        to only two parallel edges or anchored to all edges, a positive value
+        will be treated the same as zero.
+
+        A positive zone is the distance from the edge in surface-local
+        coordinates to consider exclusive.
+
+        Surfaces that do not wish to have an exclusive zone may instead specify
+        how they should interact with surfaces that do. If set to zero, the
+        surface indicates that it would like to be moved to avoid occluding
+        surfaces with a positive exclusive zone. If set to -1, the surface
+        indicates that it would not like to be moved to accommodate for other
+        surfaces, and the compositor should extend it all the way to the edges
+        it is anchored to.
+
+        For example, a panel might set its exclusive zone to 10, so that
+        maximized shell surfaces are not shown on top of it. A notification
+        might set its exclusive zone to 0, so that it is moved to avoid
+        occluding the panel, but shell surfaces are shown underneath it. A
+        wallpaper or lock screen might set their exclusive zone to -1, so that
+        they stretch below or over the panel.
+
+        The default value is 0.
+
+        Exclusive zone is double-buffered, see wl_surface.commit.
+      </description>
+      <arg name="zone" type="int"/>
+    </request>
+
+    <request name="set_margin">
+      <description summary="sets a margin from the anchor point">
+        Requests that the surface be placed some distance away from the anchor
+        point on the output, in surface-local coordinates. Setting this value
+        for edges you are not anchored to has no effect.
+
+        The exclusive zone includes the margin.
+
+        Margin is double-buffered, see wl_surface.commit.
+      </description>
+      <arg name="top" type="int"/>
+      <arg name="right" type="int"/>
+      <arg name="bottom" type="int"/>
+      <arg name="left" type="int"/>
+    </request>
+
+    <enum name="keyboard_interactivity">
+      <description summary="types of keyboard interaction possible for a layer shell surface">
+        Types of keyboard interaction possible for layer shell surfaces. The
+        rationale for this is twofold: (1) some applications are not interested
+        in keyboard events and not allowing them to be focused can improve the
+        desktop experience; (2) some applications will want to take exclusive
+        keyboard focus.
+      </description>
+
+      <entry name="none" value="0">
+        <description summary="no keyboard focus is possible">
+          This value indicates that this surface is not interested in keyboard
+          events and the compositor should never assign it the keyboard focus.
+
+          This is the default value, set for newly created layer shell surfaces.
+
+          This is useful for e.g. desktop widgets that display information or
+          only have interaction with non-keyboard input devices.
+        </description>
+      </entry>
+      <entry name="exclusive" value="1">
+        <description summary="request exclusive keyboard focus">
+          Request exclusive keyboard focus if this surface is above the shell surface layer.
+
+          For the top and overlay layers, the seat will always give
+          exclusive keyboard focus to the top-most layer which has keyboard
+          interactivity set to exclusive. If this layer contains multiple
+          surfaces with keyboard interactivity set to exclusive, the compositor
+          determines the one receiving keyboard events in an implementation-
+          defined manner. In this case, no guarantee is made when this surface
+          will receive keyboard focus (if ever).
+
+          For the bottom and background layers, the compositor is allowed to use
+          normal focus semantics.
+
+          This setting is mainly intended for applications that need to ensure
+          they receive all keyboard events, such as a lock screen or a password
+          prompt.
+        </description>
+      </entry>
+      <entry name="on_demand" value="2" since="4">
+        <description summary="request regular keyboard focus semantics">
+          This requests the compositor to allow this surface to be focused and
+          unfocused by the user in an implementation-defined manner. The user
+          should be able to unfocus this surface even regardless of the layer
+          it is on.
+
+          Typically, the compositor will want to use its normal mechanism to
+          manage keyboard focus between layer shell surfaces with this setting
+          and regular toplevels on the desktop layer (e.g. click to focus).
+          Nevertheless, it is possible for a compositor to require a special
+          interaction to focus or unfocus layer shell surfaces (e.g. requiring
+          a click even if focus follows the mouse normally, or providing a
+          keybinding to switch focus between layers).
+
+          This setting is mainly intended for desktop shell components (e.g.
+          panels) that allow keyboard interaction. Using this option can allow
+          implementing a desktop shell that can be fully usable without the
+          mouse.
+        </description>
+      </entry>
+    </enum>
+
+    <request name="set_keyboard_interactivity">
+      <description summary="requests keyboard events">
+        Set how keyboard events are delivered to this surface. By default,
+        layer shell surfaces do not receive keyboard events; this request can
+        be used to change this.
+
+        This setting is inherited by child surfaces set by the get_popup
+        request.
+
+        Layer surfaces receive pointer, touch, and tablet events normally. If
+        you do not want to receive them, set the input region on your surface
+        to an empty region.
+
+        Keyboard interactivity is double-buffered, see wl_surface.commit.
+      </description>
+      <arg name="keyboard_interactivity" type="uint" enum="keyboard_interactivity"/>
+    </request>
+
+    <request name="get_popup">
+      <description summary="assign this layer_surface as an xdg_popup parent">
+        This assigns an xdg_popup's parent to this layer_surface.  This popup
+        should have been created via xdg_surface::get_popup with the parent set
+        to NULL, and this request must be invoked before committing the popup's
+        initial state.
+
+        See the documentation of xdg_popup for more details about what an
+        xdg_popup is and how it is used.
+      </description>
+      <arg name="popup" type="object" interface="xdg_popup"/>
+    </request>
+
+    <request name="ack_configure">
+      <description summary="ack a configure event">
+        When a configure event is received, if a client commits the
+        surface in response to the configure event, then the client
+        must make an ack_configure request sometime before the commit
+        request, passing along the serial of the configure event.
+
+        If the client receives multiple configure events before it
+        can respond to one, it only has to ack the last configure event.
+
+        A client is not required to commit immediately after sending
+        an ack_configure request - it may even ack_configure several times
+        before its next surface commit.
+
+        A client may send multiple ack_configure requests before committing, but
+        only the last request sent before a commit indicates which configure
+        event the client really is responding to.
+      </description>
+      <arg name="serial" type="uint" summary="the serial from the configure event"/>
+    </request>
+
+    <request name="destroy" type="destructor">
+      <description summary="destroy the layer_surface">
+        This request destroys the layer surface.
+      </description>
+    </request>
+
+    <event name="configure">
+      <description summary="suggest a surface change">
+        The configure event asks the client to resize its surface.
+
+        Clients should arrange their surface for the new states, and then send
+        an ack_configure request with the serial sent in this configure event at
+        some point before committing the new surface.
+
+        The client is free to dismiss all but the last configure event it
+        received.
+
+        The width and height arguments specify the size of the window in
+        surface-local coordinates.
+
+        The size is a hint, in the sense that the client is free to ignore it if
+        it doesn't resize, pick a smaller size (to satisfy aspect ratio or
+        resize in steps of NxM pixels). If the client picks a smaller size and
+        is anchored to two opposite anchors (e.g. 'top' and 'bottom'), the
+        surface will be centered on this axis.
+
+        If the width or height arguments are zero, it means the client should
+        decide its own window dimension.
+      </description>
+      <arg name="serial" type="uint"/>
+      <arg name="width" type="uint"/>
+      <arg name="height" type="uint"/>
+    </event>
+
+    <event name="closed">
+      <description summary="surface should be closed">
+        The closed event is sent by the compositor when the surface will no
+        longer be shown. The output may have been destroyed or the user may
+        have asked for it to be removed. Further changes to the surface will be
+        ignored. The client should destroy the resource after receiving this
+        event, and create a new surface if they so choose.
+      </description>
+    </event>
+
+    <enum name="error">
+      <entry name="invalid_surface_state" value="0" summary="provided surface state is invalid"/>
+      <entry name="invalid_size" value="1" summary="size is invalid"/>
+      <entry name="invalid_anchor" value="2" summary="anchor bitfield is invalid"/>
+      <entry name="invalid_keyboard_interactivity" value="3" summary="keyboard interactivity is invalid"/>
+    </enum>
+
+    <enum name="anchor" bitfield="true">
+      <entry name="top" value="1" summary="the top edge of the anchor rectangle"/>
+      <entry name="bottom" value="2" summary="the bottom edge of the anchor rectangle"/>
+      <entry name="left" value="4" summary="the left edge of the anchor rectangle"/>
+      <entry name="right" value="8" summary="the right edge of the anchor rectangle"/>
+    </enum>
+
+    <!-- Version 2 additions -->
+
+    <request name="set_layer" since="2">
+      <description summary="change the layer of the surface">
+        Change the layer that the surface is rendered on.
+
+        Layer is double-buffered, see wl_surface.commit.
+      </description>
+      <arg name="layer" type="uint" enum="zwlr_layer_shell_v1.layer" summary="layer to move this surface to"/>
+    </request>
+  </interface>
+</protocol>

wayland/protocols/xdg-shell.c

@@ -0,0 +1,183 @@
+/* Generated by wayland-scanner 1.22.0 */
+
+/*
+ * Copyright © 2008-2013 Kristian Høgsberg
+ * Copyright © 2013      Rafael Antognolli
+ * Copyright © 2013      Jasper St. Pierre
+ * Copyright © 2010-2013 Intel Corporation
+ * Copyright © 2015-2017 Samsung Electronics Co., Ltd
+ * Copyright © 2015-2017 Red Hat Inc.
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a
+ * copy of this software and associated documentation files (the "Software"),
+ * to deal in the Software without restriction, including without limitation
+ * the rights to use, copy, modify, merge, publish, distribute, sublicense,
+ * and/or sell copies of the Software, and to permit persons to whom the
+ * Software is furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice (including the next
+ * paragraph) shall be included in all copies or substantial portions of the
+ * Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
+ * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
+ * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
+ * DEALINGS IN THE SOFTWARE.
+ */
+
+#include <stdlib.h>
+#include <stdint.h>
+#include "wayland-util.h"
+
+#ifndef __has_attribute
+# define __has_attribute(x) 0  /* Compatibility with non-clang compilers. */
+#endif
+
+#if (__has_attribute(visibility) || defined(__GNUC__) && __GNUC__ >= 4)
+#define WL_PRIVATE __attribute__ ((visibility("hidden")))
+#else
+#define WL_PRIVATE
+#endif
+
+extern const struct wl_interface wl_output_interface;
+extern const struct wl_interface wl_seat_interface;
+extern const struct wl_interface wl_surface_interface;
+extern const struct wl_interface xdg_popup_interface;
+extern const struct wl_interface xdg_positioner_interface;
+extern const struct wl_interface xdg_surface_interface;
+extern const struct wl_interface xdg_toplevel_interface;
+
+static const struct wl_interface *xdg_shell_types[] = {
+	NULL,
+	NULL,
+	NULL,
+	NULL,
+	&xdg_positioner_interface,
+	&xdg_surface_interface,
+	&wl_surface_interface,
+	&xdg_toplevel_interface,
+	&xdg_popup_interface,
+	&xdg_surface_interface,
+	&xdg_positioner_interface,
+	&xdg_toplevel_interface,
+	&wl_seat_interface,
+	NULL,
+	NULL,
+	NULL,
+	&wl_seat_interface,
+	NULL,
+	&wl_seat_interface,
+	NULL,
+	NULL,
+	&wl_output_interface,
+	&wl_seat_interface,
+	NULL,
+	&xdg_positioner_interface,
+	NULL,
+};
+
+static const struct wl_message xdg_wm_base_requests[] = {
+	{ "destroy", "", xdg_shell_types + 0 },
+	{ "create_positioner", "n", xdg_shell_types + 4 },
+	{ "get_xdg_surface", "no", xdg_shell_types + 5 },
+	{ "pong", "u", xdg_shell_types + 0 },
+};
+
+static const struct wl_message xdg_wm_base_events[] = {
+	{ "ping", "u", xdg_shell_types + 0 },
+};
+
+WL_PRIVATE const struct wl_interface xdg_wm_base_interface = {
+	"xdg_wm_base", 6,
+	4, xdg_wm_base_requests,
+	1, xdg_wm_base_events,
+};
+
+static const struct wl_message xdg_positioner_requests[] = {
+	{ "destroy", "", xdg_shell_types + 0 },
+	{ "set_size", "ii", xdg_shell_types + 0 },
+	{ "set_anchor_rect", "iiii", xdg_shell_types + 0 },
+	{ "set_anchor", "u", xdg_shell_types + 0 },
+	{ "set_gravity", "u", xdg_shell_types + 0 },
+	{ "set_constraint_adjustment", "u", xdg_shell_types + 0 },
+	{ "set_offset", "ii", xdg_shell_types + 0 },
+	{ "set_reactive", "3", xdg_shell_types + 0 },
+	{ "set_parent_size", "3ii", xdg_shell_types + 0 },
+	{ "set_parent_configure", "3u", xdg_shell_types + 0 },
+};
+
+WL_PRIVATE const struct wl_interface xdg_positioner_interface = {
+	"xdg_positioner", 6,
+	10, xdg_positioner_requests,
+	0, NULL,
+};
+
+static const struct wl_message xdg_surface_requests[] = {
+	{ "destroy", "", xdg_shell_types + 0 },
+	{ "get_toplevel", "n", xdg_shell_types + 7 },
+	{ "get_popup", "n?oo", xdg_shell_types + 8 },
+	{ "set_window_geometry", "iiii", xdg_shell_types + 0 },
+	{ "ack_configure", "u", xdg_shell_types + 0 },
+};
+
+static const struct wl_message xdg_surface_events[] = {
+	{ "configure", "u", xdg_shell_types + 0 },
+};
+
+WL_PRIVATE const struct wl_interface xdg_surface_interface = {
+	"xdg_surface", 6,
+	5, xdg_surface_requests,
+	1, xdg_surface_events,
+};
+
+static const struct wl_message xdg_toplevel_requests[] = {
+	{ "destroy", "", xdg_shell_types + 0 },
+	{ "set_parent", "?o", xdg_shell_types + 11 },
+	{ "set_title", "s", xdg_shell_types + 0 },
+	{ "set_app_id", "s", xdg_shell_types + 0 },
+	{ "show_window_menu", "ouii", xdg_shell_types + 12 },
+	{ "move", "ou", xdg_shell_types + 16 },
+	{ "resize", "ouu", xdg_shell_types + 18 },
+	{ "set_max_size", "ii", xdg_shell_types + 0 },
+	{ "set_min_size", "ii", xdg_shell_types + 0 },
+	{ "set_maximized", "", xdg_shell_types + 0 },
+	{ "unset_maximized", "", xdg_shell_types + 0 },
+	{ "set_fullscreen", "?o", xdg_shell_types + 21 },
+	{ "unset_fullscreen", "", xdg_shell_types + 0 },
+	{ "set_minimized", "", xdg_shell_types + 0 },
+};
+
+static const struct wl_message xdg_toplevel_events[] = {
+	{ "configure", "iia", xdg_shell_types + 0 },
+	{ "close", "", xdg_shell_types + 0 },
+	{ "configure_bounds", "4ii", xdg_shell_types + 0 },
+	{ "wm_capabilities", "5a", xdg_shell_types + 0 },
+};
+
+WL_PRIVATE const struct wl_interface xdg_toplevel_interface = {
+	"xdg_toplevel", 6,
+	14, xdg_toplevel_requests,
+	4, xdg_toplevel_events,
+};
+
+static const struct wl_message xdg_popup_requests[] = {
+	{ "destroy", "", xdg_shell_types + 0 },
+	{ "grab", "ou", xdg_shell_types + 22 },
+	{ "reposition", "3ou", xdg_shell_types + 24 },
+};
+
+static const struct wl_message xdg_popup_events[] = {
+	{ "configure", "iiii", xdg_shell_types + 0 },
+	{ "popup_done", "", xdg_shell_types + 0 },
+	{ "repositioned", "3u", xdg_shell_types + 0 },
+};
+
+WL_PRIVATE const struct wl_interface xdg_popup_interface = {
+	"xdg_popup", 6,
+	3, xdg_popup_requests,
+	3, xdg_popup_events,
+};
+

wayland/surface.c

@@ -0,0 +1,282 @@
+// SPDX-License-Identifier: GPL-3.0-only
+/*
+ * Wayland buffer manager and surface.
+ *
+ * Copyright (c) 2024, Richard Acayan. All rights reserved.
+ */
+
+#include <errno.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <wayland-client-protocol.h>
+
+#include "graphics.h"
+#include "ufkbd.h"
+#include "layout.h"
+#include "wayland.h"
+#include "wayland/viewporter.h"
+#include "wayland/wlr-layer-shell-unstable-v1.h"
+
+extern struct ufkbd_driver ufkbd_wayland;
+
+static int ufkbd_wl_surface_resize_buffers(struct ufkbd_wl_surface *ctx,
+					   uint32_t width, uint32_t height);
+
+static void on_surface_configure(void *data,
+				 struct zwlr_layer_surface_v1 *surface,
+				 uint32_t serial,
+				 uint32_t width,
+				 uint32_t height)
+{
+	struct ufkbd_wl_surface *ctx = data;
+	struct ufkbd_input_wayland *ufkbd_wl = ctx->ufkbd_wl;
+	struct ufkbd_ctx *ufkbd = ufkbd_wl->ufkbd;
+
+	zwlr_layer_surface_v1_ack_configure(surface, serial);
+
+	wp_viewport_set_source(ctx->vp, 0, 0, width * 256 * ctx->scale,
+			       height * 256 * ctx->scale);
+	wp_viewport_set_destination(ctx->vp, width, height);
+
+	ufkbd_wl_surface_resize_buffers(ctx, width, height);
+
+	ufkbd_layout_resize(ufkbd->layout, width, height);
+	ufkbd_graphics_draw_layout(ufkbd, ufkbd_wl->ufkbd->layout,
+				   width, height);
+}
+
+static void on_surface_closed(void *data,
+			      struct zwlr_layer_surface_v1 *toplev)
+{
+	struct ufkbd_wl_surface *ctx = data;
+	struct ufkbd_input_wayland *ufkbd_wl = ctx->ufkbd_wl;
+	struct ufkbd_ctx *ufkbd = ufkbd_wl->ufkbd;
+
+	ufkbd_terminate(ufkbd);
+}
+
+static const struct zwlr_layer_surface_v1_listener surface_listener = {
+	.configure = on_surface_configure,
+	.closed = on_surface_closed,
+};
+
+static int try_create_layer_surface(struct ufkbd_wl_surface *ctx)
+{
+	if (ctx->wl == NULL)
+		return -EINVAL;
+
+	if (ctx->shell == NULL)
+		return -EINVAL;
+
+	if (ctx->vper == NULL)
+		return -EINVAL;
+
+	ctx->vp = wp_viewporter_get_viewport(ctx->vper, ctx->wl);
+	if (ctx->vp == NULL)
+		return -ENOMEM;
+
+	ctx->wlr = zwlr_layer_shell_v1_get_layer_surface(ctx->shell, ctx->wl, NULL, ZWLR_LAYER_SHELL_V1_LAYER_TOP, "ufkbd-osk");
+	if (ctx->wlr == NULL)
+		return -ENOMEM;
+
+	zwlr_layer_surface_v1_set_anchor(ctx->wlr,
+					 ZWLR_LAYER_SURFACE_V1_ANCHOR_LEFT
+				       | ZWLR_LAYER_SURFACE_V1_ANCHOR_RIGHT
+				       | ZWLR_LAYER_SURFACE_V1_ANCHOR_BOTTOM);
+	zwlr_layer_surface_v1_set_size(ctx->wlr, 0, 185);
+	zwlr_layer_surface_v1_set_exclusive_zone(ctx->wlr, 185);
+
+	zwlr_layer_surface_v1_add_listener(ctx->wlr, &surface_listener, ctx);
+
+	// Commit the role given to the surface
+	wl_surface_commit(ctx->wl);
+
+	return 0;
+}
+
+static void on_global_compositor(void *data,
+				 struct wl_registry *reg,
+				 uint32_t name,
+				 uint32_t version)
+{
+	struct ufkbd_wl_surface *ctx = data;
+
+	if (version < WL_COMPOSITOR_CREATE_SURFACE_SINCE_VERSION)
+		return;
+
+	ctx->compositor = wl_registry_bind(reg,
+					   name,
+					   &wl_compositor_interface,
+					   version);
+	if (ctx->compositor == NULL) {
+		fprintf(stderr, "warn: could not bind to compositor\n");
+		return;
+	}
+
+	ctx->wl = wl_compositor_create_surface(ctx->compositor);
+	if (ctx->wl == NULL) {
+		fprintf(stderr, "warn: no valid surface\n");
+		return;
+	}
+
+	try_create_layer_surface(ctx);
+}
+
+static void on_global_shell(void *data,
+			    struct wl_registry *reg,
+			    uint32_t name,
+			    uint32_t version)
+{
+	struct ufkbd_wl_surface *ctx = data;
+
+	ctx->shell = wl_registry_bind(reg,
+				      name,
+				      &zwlr_layer_shell_v1_interface,
+				      version);
+	if (ctx->shell == NULL) {
+		fprintf(stderr, "wl: warn: could not bind to window manager\n");
+		return;
+	}
+
+	try_create_layer_surface(ctx);
+}
+
+static void on_global_viewporter(void *data,
+				 struct wl_registry *reg,
+				 uint32_t name,
+				 uint32_t version)
+{
+	struct ufkbd_wl_surface *ctx = data;
+
+	ctx->vper = wl_registry_bind(reg,
+				     name,
+				     &wp_viewporter_interface,
+				     version);
+	if (ctx->vper == NULL) {
+		fprintf(stderr, "wl: warn: could not bind to viewporter\n");
+		return;
+	}
+
+	try_create_layer_surface(ctx);
+}
+
+int ufkbd_wl_surface_consume_buffer(struct ufkbd_wl_surface *ctx,
+				    struct wl_buffer **buf, void **ptr)
+{
+	int ret;
+
+	if (buf == NULL || ptr == NULL)
+		return -EINVAL;
+
+	ret = ufkbd_wl_buffer_consume(&ctx->bufs[0], buf, ptr);
+	if (ret != -EBUSY)
+		return ret;
+
+	ret = ufkbd_wl_buffer_consume(&ctx->bufs[1], buf, ptr);
+
+	return ret;
+}
+
+static int ufkbd_wl_surface_resize_buffers(struct ufkbd_wl_surface *ctx,
+					   uint32_t width, uint32_t height)
+{
+	int ret;
+
+	ctx->stride = (size_t) width * 4;
+
+	ret = ufkbd_wl_buffer_resize(&ctx->bufs[0],
+				     width * ctx->scale,
+				     height * ctx->scale);
+	if (ret)
+		return ret;
+
+	return ufkbd_wl_buffer_resize(&ctx->bufs[1],
+				      width * ctx->scale,
+				      height * ctx->scale);
+}
+
+int ufkbd_wl_surface_init(struct ufkbd_input_wayland *ufkbd_wl,
+			  struct ufkbd_wl_surface **out)
+{
+	struct ufkbd_wl_surface *ctx;
+	int ret;
+
+	ctx = calloc(1, sizeof(*ctx));
+	if (ctx == NULL)
+		return -errno;
+
+	ctx->ufkbd_wl = ufkbd_wl;
+	ctx->scale = 1;
+
+	ret = ufkbd_wl_buffer_init(&ctx->bufs[0], ufkbd_wl, 0);
+	if (ret)
+		goto err_free_ctx;
+
+	ret = ufkbd_wl_buffer_init(&ctx->bufs[1], ufkbd_wl, 1);
+	if (ret)
+		goto err_uninit_buf0;
+
+	ctx->listener_comp.iface = &wl_compositor_interface;
+	ctx->listener_comp.cb = on_global_compositor;
+	ctx->listener_comp.data = ctx;
+
+	ret = ufkbd_wl_global_listener_add(ufkbd_wl, &ctx->listener_comp);
+	if (ret)
+		goto err_uninit_buf1;
+
+	ctx->listener_shell.iface = &zwlr_layer_shell_v1_interface;
+	ctx->listener_shell.cb = on_global_shell;
+	ctx->listener_shell.data = ctx;
+
+	ret = ufkbd_wl_global_listener_add(ufkbd_wl, &ctx->listener_shell);
+	if (ret)
+		goto err_uninit_buf1;
+
+	ctx->listener_viewporter.iface = &wp_viewporter_interface;
+	ctx->listener_viewporter.cb = on_global_viewporter;
+	ctx->listener_viewporter.data = ctx;
+
+	ret = ufkbd_wl_global_listener_add(ufkbd_wl, &ctx->listener_viewporter);
+	if (ret)
+		goto err_uninit_buf1;
+
+	ufkbd_graphics_set_scale(ctx->ufkbd_wl->ufkbd->graphics, ctx->scale);
+
+	*out = ctx;
+
+	return 0;
+
+err_uninit_buf1:
+	ufkbd_wl_buffer_uninit(&ctx->bufs[1]);
+err_uninit_buf0:
+	ufkbd_wl_buffer_uninit(&ctx->bufs[0]);
+err_free_ctx:
+	free(ctx);
+	return ret;
+}
+
+void ufkbd_wl_surface_uninit(struct ufkbd_wl_surface *ctx)
+{
+	if (ctx->vper != NULL)
+		wp_viewporter_destroy(ctx->vper);
+
+	if (ctx->vp != NULL)
+		wp_viewport_destroy(ctx->vp);
+
+	if (ctx->wlr != NULL)
+		zwlr_layer_surface_v1_destroy(ctx->wlr);
+
+	if (ctx->wl != NULL)
+		wl_surface_destroy(ctx->wl);
+
+	if (ctx->shell != NULL)
+		zwlr_layer_shell_v1_destroy(ctx->shell);
+
+	if (ctx->compositor != NULL)
+		wl_compositor_destroy(ctx->compositor);
+
+	ufkbd_wl_buffer_uninit(&ctx->bufs[1]);
+	ufkbd_wl_buffer_uninit(&ctx->bufs[0]);
+
+	free(ctx);
+}

wayland/wayland.h

@@ -0,0 +1,149 @@
+/* SPDX-License-Identifier: GPL-3.0-only */
+/*
+ * Wayland objects.
+ *
+ * Copyright (c) 2024, Richard Acayan. All rights reserved.
+ */
+
+#ifndef UFKBD_WAYLAND_H
+#define UFKBD_WAYLAND_H
+
+#include <stdbool.h>
+#include <stddef.h>
+#include <stdint.h>
+#include <xkbcommon/xkbcommon.h>
+
+#include "ufkbd.h"
+
+#define MAX_GLOBAL_LISTENERS 16
+
+#define SHM_PATH_SIZE 256
+
+struct ufkbd_ctx;
+
+struct wl_display;
+struct wl_registry;
+struct wl_seat;
+struct wl_pointer;
+struct wl_compositor;
+struct xdg_wm_base;
+
+struct wl_surface;
+struct wp_viewport;
+struct wp_viewporter;
+struct xdg_surface;
+struct xdg_toplevel;
+
+struct zwp_virtual_keyboard_manager_v1;
+struct zwp_virtual_keyboard_v1;
+
+struct zwp_input_method_manager_v2;
+struct zwp_input_method_v2;
+
+struct ufkbd_input_wayland;
+
+struct ufkbd_wl_global_listener {
+	const struct wl_interface *iface;
+	void (*cb)(void *data, struct wl_registry *reg, uint32_t name, uint32_t version);
+	void *data;
+};
+
+struct ufkbd_wl_input {
+	struct ufkbd_input_wayland *ufkbd_wl;
+
+	struct ufkbd_wl_global_listener listener_seat;
+	struct ufkbd_wl_global_listener listener_manager;
+	struct ufkbd_wl_global_listener listener_methodman;
+
+	struct wl_seat *seat;
+	struct wl_pointer *pointer;
+	struct wl_touch *touch;
+
+	struct zwp_virtual_keyboard_manager_v1 *manager;
+	struct zwp_virtual_keyboard_v1 *kb;
+
+	uint32_t mod_state;
+};
+
+struct ufkbd_wl_buffer {
+	struct ufkbd_ctx *ufkbd;
+	unsigned int id;
+
+	struct ufkbd_wl_global_listener listener;
+	struct wl_shm *wl;
+
+	struct wl_shm_pool *pool;
+	struct wl_buffer *buf;
+
+	bool avail, dirty, resize;
+
+	void *ptr;
+	int fd;
+
+	uint32_t width, height;
+	size_t size;
+
+	char path[SHM_PATH_SIZE];
+};
+
+struct ufkbd_wl_surface {
+	struct ufkbd_input_wayland *ufkbd_wl;
+
+	struct ufkbd_wl_global_listener listener_comp;
+	struct ufkbd_wl_global_listener listener_shell;
+	struct ufkbd_wl_global_listener listener_viewporter;
+
+	struct wl_compositor *compositor;
+	struct zwlr_layer_shell_v1 *shell;
+
+	struct wl_surface *wl;
+	struct zwlr_layer_surface_v1 *wlr;
+
+	struct wp_viewporter *vper;
+	struct wp_viewport *vp;
+
+	unsigned int scale;
+	size_t stride;
+
+	struct ufkbd_wl_buffer bufs[2];
+};
+
+struct ufkbd_input_wayland {
+	struct ufkbd_ctx *ufkbd;
+
+	struct ufkbd_wl_surface *surface;
+	struct ufkbd_wl_input *input;
+
+	struct wl_display *display;
+	struct wl_registry *registry;
+	int fd;
+
+	size_t n_global_listeners;
+	struct ufkbd_wl_global_listener *global_listeners[MAX_GLOBAL_LISTENERS];
+};
+
+int ufkbd_wl_buffer_consume(struct ufkbd_wl_buffer *ctx,
+				    struct wl_buffer **buf, void **ptr);
+int ufkbd_wl_buffer_resize(struct ufkbd_wl_buffer *ctx,
+				   uint32_t width, uint32_t height);
+int ufkbd_wl_buffer_init(struct ufkbd_wl_buffer *ctx,
+				 struct ufkbd_input_wayland *ufkbd_wl,
+				 unsigned int id);
+void ufkbd_wl_buffer_uninit(struct ufkbd_wl_buffer *ctx);
+
+int ufkbd_wl_surface_consume_buffer(struct ufkbd_wl_surface *ctx,
+				    struct wl_buffer **buf, void **ptr);
+int ufkbd_wl_surface_init(struct ufkbd_input_wayland *ufkbd_wl,
+			  struct ufkbd_wl_surface **out);
+void ufkbd_wl_surface_uninit(struct ufkbd_wl_surface *ctx);
+
+int ufkbd_wl_input_init(struct ufkbd_input_wayland *ufkbd_wl,
+			struct ufkbd_wl_input **out);
+void ufkbd_wl_input_uninit(struct ufkbd_wl_input *ctx);
+int ufkbd_wl_input_send_key(struct ufkbd_wl_input *ctx, int key, bool repeat);
+int ufkbd_wl_input_send_mod(struct ufkbd_wl_input *ctx, enum ufkbd_modifier mod, bool pressed);
+
+int ufkbd_wl_global_listener_add(struct ufkbd_input_wayland *ctx,
+				 struct ufkbd_wl_global_listener *listener);
+
+#endif /* UFKBD_WAYLAND_H */