1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
|
// SPDX-License-Identifier: GPL-2.0
/*
* Copyright (C) 2026 Jason A. Donenfeld <Jason@zx2c4.com>. All Rights Reserved.
*/
#define _GNU_SOURCE
#include <err.h>
#include <locale.h>
#include <signal.h>
#include <stdint.h>
#include <stdio.h>
#include <string.h>
#include <time.h>
#include <wchar.h>
#include <wayland-client.h>
#include <xkbcommon/xkbcommon.h>
#define ARRAY_SIZE(a) (sizeof(a) / sizeof((a)[0]))
/* https://invent.kde.org/libraries/plasma-wayland-protocols/-/blob/master/src/protocols/fake-input.xml */
static const struct wl_message input_methods[] = {
{ "authenticate", "ss", NULL },
{ "pointer_motion", "ff", NULL },
{ "button", "uu", NULL },
{ "axis", "uf", NULL },
{ "touch_down", "2uff", NULL },
{ "touch_motion", "2uff", NULL },
{ "touch_up", "2u", NULL },
{ "touch_cancel", "2", NULL },
{ "touch_frame", "2", NULL },
{ "pointer_motion_absolute", "3ff", NULL },
{ "keyboard_key", "4uu", NULL },
{ "destroy", "5", NULL },
{ "keyboard_keysym", "6uu", NULL },
};
static const struct wl_interface input_interface = { "org_kde_kwin_fake_input", 6, ARRAY_SIZE(input_methods), input_methods, 0, NULL };
/* https://invent.kde.org/libraries/plasma-wayland-protocols/-/blob/master/src/protocols/keystate.xml */
static const struct wl_message state_methods[] = { { "fetchStates", "", NULL } };
static const struct wl_message state_events[] = { { "stateChanged", "uu", NULL } };
static const struct wl_interface state_interface = { "org_kde_kwin_keystate", 1, ARRAY_SIZE(state_methods), state_methods, ARRAY_SIZE(state_events), state_events };
enum { AUTHENTICATE = 0, KEY = 10, DESTROY = 11, KEYSYM = 12 };
enum { RELEASED = 0, PRESSED = 1, CAPS_LOCK_KEY = 58 };
static volatile sig_atomic_t interrupted;
static void on_signal(int signo)
{
interrupted = signo;
}
static void state_changed(void *data, struct wl_proxy *, uint32_t key, uint32_t state)
{
bool **caps = data;
if (key == 0) {
*caps[0] = true;
*caps[1] = state != 0;
}
}
static void registry_global(void *data, struct wl_registry *, uint32_t name, const char *interface, uint32_t version)
{
uint32_t **names = data;
if (!strcmp(interface, input_interface.name) && version >= (uint32_t)input_interface.version)
*names[0] = name;
else if (!strcmp(interface, state_interface.name))
*names[1] = name;
}
static void registry_global_remove(void *, struct wl_registry *, uint32_t)
{
}
static void type_key(struct wl_proxy *input, uint32_t request, uint32_t key)
{
wl_proxy_marshal_flags(input, request, NULL, input_interface.version, 0, key, PRESSED);
wl_proxy_marshal_flags(input, request, NULL, input_interface.version, 0, key, RELEASED);
}
int main(int argc, char **argv)
{
bool caps_known = false, caps_locked = false, restore_caps = false, ret = false;
uint32_t input_name = 0, keystate_name = 0;
struct wl_proxy *input, *keystate;
struct wl_registry *registry;
struct wl_display *display;
xkb_keysym_t keysym;
wint_t cp;
if (argc != 1)
errx(1, "usage: %s < text.txt", argv[0]);
if (!setlocale(LC_CTYPE, "C.UTF-8"))
errx(1, "cannot select C.UTF-8 locale");
if (sigaction(SIGINT, &(struct sigaction){ .sa_handler = on_signal }, NULL) < 0 ||
sigaction(SIGTERM, &(struct sigaction){ .sa_handler = on_signal }, NULL) < 0 ||
sigaction(SIGHUP, &(struct sigaction){ .sa_handler = on_signal }, NULL) < 0) {
warn("installing signal handlers");
goto err;
}
display = wl_display_connect(NULL);
if (!display) {
warn("cannot connect to display");
goto err;
}
registry = wl_display_get_registry(display);
if (!registry) {
warn("getting registry");
goto err_display;
}
wl_registry_add_listener(registry,
&(const struct wl_registry_listener){ registry_global, registry_global_remove },
(uint32_t *[]){ &input_name, &keystate_name });
if (wl_display_roundtrip(display) < 0) {
warn("synchronizing display");
goto err_registry;
}
if (!input_name || !keystate_name) {
warnx("%s-v%d and %s-v%d protocols are required",
input_interface.name, input_interface.version, state_interface.name, state_interface.version);
goto err_registry;
}
keystate = wl_registry_bind(registry, keystate_name, &state_interface, state_interface.version);
if (!keystate) {
warn("binding key-state interface");
goto err_registry;
}
wl_proxy_add_listener(keystate,
(void (*[])(void)){ (void (*)(void))state_changed },
(bool *[]){ &caps_known, &caps_locked });
input = wl_registry_bind(registry, input_name, &input_interface, input_interface.version);
if (!input) {
warn("binding fake-input interface");
goto err_keystate;
}
wl_proxy_marshal_flags(input, AUTHENTICATE, NULL, input_interface.version, 0, "kwin-type", "Type text from stdin");
wl_proxy_marshal_flags(keystate, 0, NULL, state_interface.version, 0);
if (wl_display_roundtrip(display) < 0) {
warn("synchronizing display");
goto err_input;
}
if (!caps_known) {
warnx("cannot read caps lock state");
goto err_input;
}
/* Chrome has some complicated keyboard refreshing logic. We could patch upstream kwin to
* hack around it, or fix Chrome itself, but it's probably easier to just delay briefly
* here. Probably other things will benefit from this hack too. Oh well. */
nanosleep(&(struct timespec){ .tv_nsec = 100000000 }, NULL);
if (interrupted)
goto err_input;
if (caps_locked) {
restore_caps = true;
type_key(input, KEY, CAPS_LOCK_KEY);
}
while (!interrupted && (cp = fgetwc(stdin)) != WEOF) {
if (interrupted)
break;
keysym = xkb_utf32_to_keysym(cp);
if (keysym == XKB_KEY_Linefeed)
keysym = XKB_KEY_Return;
type_key(input, KEYSYM, keysym);
}
if (!interrupted && ferror(stdin))
warn("reading stdin");
else
ret = true;
err_input:
if (restore_caps)
type_key(input, KEY, CAPS_LOCK_KEY);
wl_proxy_marshal_flags(input, DESTROY, NULL, input_interface.version, WL_MARSHAL_FLAG_DESTROY);
if (wl_display_roundtrip(display) < 0) {
warn("synchronizing display");
ret = false;
}
err_keystate:
wl_proxy_destroy(keystate);
err_registry:
wl_registry_destroy(registry);
err_display:
wl_display_disconnect(display);
err:
return interrupted ? (128 + interrupted) : (ret ? 0 : 1);
}
|
