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systemd/src/libsystemd-terminal/idev-keyboard.c
Michal Schmidt 23bbb0de4e treewide: more log_*_errno + return simplifications
2014-11-28 18:24:30 +01:00

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/*-*- Mode: C; c-basic-offset: 8; indent-tabs-mode: nil -*-*/
/***
This file is part of systemd.
Copyright (C) 2014 David Herrmann <dh.herrmann@gmail.com>
systemd is free software; you can redistribute it and/or modify it
under the terms of the GNU Lesser General Public License as published by
the Free Software Foundation; either version 2.1 of the License, or
(at your option) any later version.
systemd is distributed in the hope that it will be useful, but
WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
Lesser General Public License for more details.
You should have received a copy of the GNU Lesser General Public License
along with systemd; If not, see <http://www.gnu.org/licenses/>.
***/
#include <inttypes.h>
#include <stdbool.h>
#include <stdlib.h>
#include <systemd/sd-bus.h>
#include <systemd/sd-event.h>
#include <xkbcommon/xkbcommon.h>
#include <xkbcommon/xkbcommon-compose.h>
#include "bus-util.h"
#include "hashmap.h"
#include "idev.h"
#include "idev-internal.h"
#include "macro.h"
#include "term-internal.h"
#include "util.h"
typedef struct kbdtbl kbdtbl;
typedef struct kbdmap kbdmap;
typedef struct kbdctx kbdctx;
typedef struct idev_keyboard idev_keyboard;
struct kbdtbl {
unsigned long ref;
struct xkb_compose_table *xkb_compose_table;
};
struct kbdmap {
unsigned long ref;
struct xkb_keymap *xkb_keymap;
xkb_mod_index_t modmap[IDEV_KBDMOD_CNT];
xkb_led_index_t ledmap[IDEV_KBDLED_CNT];
};
struct kbdctx {
unsigned long ref;
idev_context *context;
struct xkb_context *xkb_context;
struct kbdmap *kbdmap;
struct kbdtbl *kbdtbl;
sd_bus_slot *slot_locale_props_changed;
sd_bus_slot *slot_locale_get_all;
char *locale_lang;
char *locale_x11_model;
char *locale_x11_layout;
char *locale_x11_variant;
char *locale_x11_options;
char *last_x11_model;
char *last_x11_layout;
char *last_x11_variant;
char *last_x11_options;
};
struct idev_keyboard {
idev_device device;
kbdctx *kbdctx;
kbdmap *kbdmap;
kbdtbl *kbdtbl;
struct xkb_state *xkb_state;
struct xkb_compose_state *xkb_compose;
usec_t repeat_delay;
usec_t repeat_rate;
sd_event_source *repeat_timer;
uint32_t n_syms;
idev_data evdata;
idev_data repdata;
uint32_t *compose_res;
bool repeating : 1;
};
#define keyboard_from_device(_d) container_of((_d), idev_keyboard, device)
#define KBDCTX_KEY "keyboard.context" /* hashmap key for global kbdctx */
#define KBDXKB_SHIFT (8) /* xkb shifts evdev key-codes by 8 */
#define KBDKEY_UP (0) /* KEY UP event value */
#define KBDKEY_DOWN (1) /* KEY DOWN event value */
#define KBDKEY_REPEAT (2) /* KEY REPEAT event value */
static const idev_device_vtable keyboard_vtable;
static int keyboard_update_kbdmap(idev_keyboard *k);
static int keyboard_update_kbdtbl(idev_keyboard *k);
/*
* Keyboard Compose Tables
*/
static kbdtbl *kbdtbl_ref(kbdtbl *kt) {
if (kt) {
assert_return(kt->ref > 0, NULL);
++kt->ref;
}
return kt;
}
static kbdtbl *kbdtbl_unref(kbdtbl *kt) {
if (!kt)
return NULL;
assert_return(kt->ref > 0, NULL);
if (--kt->ref > 0)
return NULL;
xkb_compose_table_unref(kt->xkb_compose_table);
free(kt);
return 0;
}
DEFINE_TRIVIAL_CLEANUP_FUNC(kbdtbl*, kbdtbl_unref);
static int kbdtbl_new_from_locale(kbdtbl **out, kbdctx *kc, const char *locale) {
_cleanup_(kbdtbl_unrefp) kbdtbl *kt = NULL;
assert_return(out, -EINVAL);
assert_return(locale, -EINVAL);
kt = new0(kbdtbl, 1);
if (!kt)
return -ENOMEM;
kt->ref = 1;
kt->xkb_compose_table = xkb_compose_table_new_from_locale(kc->xkb_context,
locale,
XKB_COMPOSE_COMPILE_NO_FLAGS);
if (!kt->xkb_compose_table)
return errno > 0 ? -errno : -EFAULT;
*out = kt;
kt = NULL;
return 0;
}
/*
* Keyboard Keymaps
*/
static const char * const kbdmap_modmap[IDEV_KBDMOD_CNT] = {
[IDEV_KBDMOD_IDX_SHIFT] = XKB_MOD_NAME_SHIFT,
[IDEV_KBDMOD_IDX_CTRL] = XKB_MOD_NAME_CTRL,
[IDEV_KBDMOD_IDX_ALT] = XKB_MOD_NAME_ALT,
[IDEV_KBDMOD_IDX_LINUX] = XKB_MOD_NAME_LOGO,
[IDEV_KBDMOD_IDX_CAPS] = XKB_MOD_NAME_CAPS,
};
static const char * const kbdmap_ledmap[IDEV_KBDLED_CNT] = {
[IDEV_KBDLED_IDX_NUM] = XKB_LED_NAME_NUM,
[IDEV_KBDLED_IDX_CAPS] = XKB_LED_NAME_CAPS,
[IDEV_KBDLED_IDX_SCROLL] = XKB_LED_NAME_SCROLL,
};
static kbdmap *kbdmap_ref(kbdmap *km) {
assert_return(km, NULL);
assert_return(km->ref > 0, NULL);
++km->ref;
return km;
}
static kbdmap *kbdmap_unref(kbdmap *km) {
if (!km)
return NULL;
assert_return(km->ref > 0, NULL);
if (--km->ref > 0)
return NULL;
xkb_keymap_unref(km->xkb_keymap);
free(km);
return 0;
}
DEFINE_TRIVIAL_CLEANUP_FUNC(kbdmap*, kbdmap_unref);
static int kbdmap_new_from_names(kbdmap **out,
kbdctx *kc,
const char *model,
const char *layout,
const char *variant,
const char *options) {
_cleanup_(kbdmap_unrefp) kbdmap *km = NULL;
struct xkb_rule_names rmlvo = { };
unsigned int i;
assert_return(out, -EINVAL);
km = new0(kbdmap, 1);
if (!km)
return -ENOMEM;
km->ref = 1;
rmlvo.rules = "evdev";
rmlvo.model = model;
rmlvo.layout = layout;
rmlvo.variant = variant;
rmlvo.options = options;
errno = 0;
km->xkb_keymap = xkb_keymap_new_from_names(kc->xkb_context, &rmlvo, 0);
if (!km->xkb_keymap)
return errno > 0 ? -errno : -EFAULT;
for (i = 0; i < IDEV_KBDMOD_CNT; ++i) {
const char *t = kbdmap_modmap[i];
if (t)
km->modmap[i] = xkb_keymap_mod_get_index(km->xkb_keymap, t);
else
km->modmap[i] = XKB_MOD_INVALID;
}
for (i = 0; i < IDEV_KBDLED_CNT; ++i) {
const char *t = kbdmap_ledmap[i];
if (t)
km->ledmap[i] = xkb_keymap_led_get_index(km->xkb_keymap, t);
else
km->ledmap[i] = XKB_LED_INVALID;
}
*out = km;
km = NULL;
return 0;
}
/*
* Keyboard Context
*/
static int kbdctx_refresh_compose_table(kbdctx *kc, const char *lang) {
kbdtbl *kt;
idev_session *s;
idev_device *d;
Iterator i, j;
int r;
if (!lang)
lang = "C";
if (streq_ptr(kc->locale_lang, lang))
return 0;
r = free_and_strdup(&kc->locale_lang, lang);
if (r < 0)
return r;
log_debug("idev-keyboard: new default compose table: [ %s ]", lang);
r = kbdtbl_new_from_locale(&kt, kc, lang);
if (r < 0) {
/* TODO: We need to catch the case where no compose-file is
* available. xkb doesn't tell us so far.. so we must not treat
* it as a hard-failure but just continue. Preferably, we want
* xkb to tell us exactly whether compilation failed or whether
* there is no compose file available for this locale. */
log_debug_errno(r, "idev-keyboard: cannot load compose-table for '%s': %m",
lang);
r = 0;
kt = NULL;
}
kbdtbl_unref(kc->kbdtbl);
kc->kbdtbl = kt;
HASHMAP_FOREACH(s, kc->context->session_map, i)
HASHMAP_FOREACH(d, s->device_map, j)
if (idev_is_keyboard(d))
keyboard_update_kbdtbl(keyboard_from_device(d));
return 0;
}
static void move_str(char **dest, char **src) {
free(*dest);
*dest = *src;
*src = NULL;
}
static int kbdctx_refresh_keymap(kbdctx *kc) {
idev_session *s;
idev_device *d;
Iterator i, j;
kbdmap *km;
int r;
if (kc->kbdmap &&
streq_ptr(kc->locale_x11_model, kc->last_x11_model) &&
streq_ptr(kc->locale_x11_layout, kc->last_x11_layout) &&
streq_ptr(kc->locale_x11_variant, kc->last_x11_variant) &&
streq_ptr(kc->locale_x11_options, kc->last_x11_options))
return 0 ;
move_str(&kc->last_x11_model, &kc->locale_x11_model);
move_str(&kc->last_x11_layout, &kc->locale_x11_layout);
move_str(&kc->last_x11_variant, &kc->locale_x11_variant);
move_str(&kc->last_x11_options, &kc->locale_x11_options);
log_debug("idev-keyboard: new default keymap: [%s / %s / %s / %s]",
kc->last_x11_model, kc->last_x11_layout, kc->last_x11_variant, kc->last_x11_options);
/* TODO: add a fallback keymap that's compiled-in */
r = kbdmap_new_from_names(&km, kc, kc->last_x11_model, kc->last_x11_layout,
kc->last_x11_variant, kc->last_x11_options);
if (r < 0)
return log_debug_errno(r, "idev-keyboard: cannot create keymap from locale1: %m");
kbdmap_unref(kc->kbdmap);
kc->kbdmap = km;
HASHMAP_FOREACH(s, kc->context->session_map, i)
HASHMAP_FOREACH(d, s->device_map, j)
if (idev_is_keyboard(d))
keyboard_update_kbdmap(keyboard_from_device(d));
return 0;
}
static int kbdctx_set_locale(sd_bus *bus, const char *member, sd_bus_message *m, sd_bus_error *error, void *userdata) {
kbdctx *kc = userdata;
const char *s, *ctype = NULL, *lang = NULL;
int r;
r = sd_bus_message_enter_container(m, 'a', "s");
if (r < 0)
goto error;
while ((r = sd_bus_message_read(m, "s", &s)) > 0) {
if (!ctype)
ctype = startswith(s, "LC_CTYPE=");
if (!lang)
lang = startswith(s, "LANG=");
}
if (r < 0)
goto error;
r = sd_bus_message_exit_container(m);
if (r < 0)
goto error;
kbdctx_refresh_compose_table(kc, ctype ? : lang);
r = 0;
error:
if (r < 0)
log_debug_errno(r, "idev-keyboard: cannot parse locale property from locale1: %m");
return r;
}
static const struct bus_properties_map kbdctx_locale_map[] = {
{ "Locale", "as", kbdctx_set_locale, 0 },
{ "X11Model", "s", NULL, offsetof(kbdctx, locale_x11_model) },
{ "X11Layout", "s", NULL, offsetof(kbdctx, locale_x11_layout) },
{ "X11Variant", "s", NULL, offsetof(kbdctx, locale_x11_variant) },
{ "X11Options", "s", NULL, offsetof(kbdctx, locale_x11_options) },
};
static int kbdctx_locale_get_all_fn(sd_bus *bus,
sd_bus_message *m,
void *userdata,
sd_bus_error *ret_err) {
kbdctx *kc = userdata;
int r;
kc->slot_locale_get_all = sd_bus_slot_unref(kc->slot_locale_get_all);
if (sd_bus_message_is_method_error(m, NULL)) {
const sd_bus_error *error = sd_bus_message_get_error(m);
log_debug("idev-keyboard: GetAll() on locale1 failed: %s: %s",
error->name, error->message);
return 0;
}
r = bus_message_map_all_properties(bus, m, kbdctx_locale_map, kc);
if (r < 0) {
log_debug("idev-keyboard: erroneous GetAll() reply from locale1");
return 0;
}
kbdctx_refresh_keymap(kc);
return 0;
}
static int kbdctx_query_locale(kbdctx *kc) {
_cleanup_bus_message_unref_ sd_bus_message *m = NULL;
int r;
kc->slot_locale_get_all = sd_bus_slot_unref(kc->slot_locale_get_all);
r = sd_bus_message_new_method_call(kc->context->sysbus,
&m,
"org.freedesktop.locale1",
"/org/freedesktop/locale1",
"org.freedesktop.DBus.Properties",
"GetAll");
if (r < 0)
goto error;
r = sd_bus_message_append(m, "s", "org.freedesktop.locale1");
if (r < 0)
goto error;
r = sd_bus_call_async(kc->context->sysbus,
&kc->slot_locale_get_all,
m,
kbdctx_locale_get_all_fn,
kc,
0);
if (r < 0)
goto error;
return 0;
error:
return log_debug_errno(r, "idev-keyboard: cannot send GetAll to locale1: %m");
}
static int kbdctx_locale_props_changed_fn(sd_bus *bus,
sd_bus_message *signal,
void *userdata,
sd_bus_error *ret_err) {
kbdctx *kc = userdata;
int r;
kc->slot_locale_get_all = sd_bus_slot_unref(kc->slot_locale_get_all);
/* skip interface name */
r = sd_bus_message_skip(signal, "s");
if (r < 0)
goto error;
r = bus_message_map_properties_changed(bus, signal, kbdctx_locale_map, kc);
if (r < 0)
goto error;
if (r > 0) {
r = kbdctx_query_locale(kc);
if (r < 0)
return r;
}
kbdctx_refresh_keymap(kc);
return 0;
error:
return log_debug_errno(r, "idev-keyboard: cannot handle PropertiesChanged from locale1: %m");
}
static int kbdctx_setup_bus(kbdctx *kc) {
int r;
r = sd_bus_add_match(kc->context->sysbus,
&kc->slot_locale_props_changed,
"type='signal',"
"sender='org.freedesktop.locale1',"
"interface='org.freedesktop.DBus.Properties',"
"member='PropertiesChanged',"
"path='/org/freedesktop/locale1'",
kbdctx_locale_props_changed_fn,
kc);
if (r < 0)
return log_debug_errno(r, "idev-keyboard: cannot setup locale1 link: %m");
return kbdctx_query_locale(kc);
}
static void kbdctx_log_fn(struct xkb_context *ctx, enum xkb_log_level lvl, const char *format, va_list args) {
char buf[LINE_MAX];
int sd_lvl;
if (lvl >= XKB_LOG_LEVEL_DEBUG)
sd_lvl = LOG_DEBUG;
else if (lvl >= XKB_LOG_LEVEL_INFO)
sd_lvl = LOG_INFO;
else if (lvl >= XKB_LOG_LEVEL_WARNING)
sd_lvl = LOG_INFO; /* most XKB warnings really are informational */
else if (lvl >= XKB_LOG_LEVEL_ERROR)
sd_lvl = LOG_ERR;
else if (lvl >= XKB_LOG_LEVEL_CRITICAL)
sd_lvl = LOG_CRIT;
else
sd_lvl = LOG_CRIT;
snprintf(buf, sizeof(buf), "idev-xkb: %s", format);
log_internalv(sd_lvl, 0, __FILE__, __LINE__, __func__, buf, args);
}
static kbdctx *kbdctx_ref(kbdctx *kc) {
assert_return(kc, NULL);
assert_return(kc->ref > 0, NULL);
++kc->ref;
return kc;
}
static kbdctx *kbdctx_unref(kbdctx *kc) {
if (!kc)
return NULL;
assert_return(kc->ref > 0, NULL);
if (--kc->ref > 0)
return NULL;
free(kc->last_x11_options);
free(kc->last_x11_variant);
free(kc->last_x11_layout);
free(kc->last_x11_model);
free(kc->locale_x11_options);
free(kc->locale_x11_variant);
free(kc->locale_x11_layout);
free(kc->locale_x11_model);
free(kc->locale_lang);
kc->slot_locale_get_all = sd_bus_slot_unref(kc->slot_locale_get_all);
kc->slot_locale_props_changed = sd_bus_slot_unref(kc->slot_locale_props_changed);
kc->kbdtbl = kbdtbl_unref(kc->kbdtbl);
kc->kbdmap = kbdmap_unref(kc->kbdmap);
xkb_context_unref(kc->xkb_context);
hashmap_remove_value(kc->context->data_map, KBDCTX_KEY, kc);
free(kc);
return NULL;
}
DEFINE_TRIVIAL_CLEANUP_FUNC(kbdctx*, kbdctx_unref);
static int kbdctx_new(kbdctx **out, idev_context *c) {
_cleanup_(kbdctx_unrefp) kbdctx *kc = NULL;
int r;
assert_return(out, -EINVAL);
assert_return(c, -EINVAL);
kc = new0(kbdctx, 1);
if (!kc)
return -ENOMEM;
kc->ref = 1;
kc->context = c;
errno = 0;
kc->xkb_context = xkb_context_new(XKB_CONTEXT_NO_FLAGS);
if (!kc->xkb_context)
return errno > 0 ? -errno : -EFAULT;
xkb_context_set_log_fn(kc->xkb_context, kbdctx_log_fn);
xkb_context_set_log_level(kc->xkb_context, XKB_LOG_LEVEL_DEBUG);
r = kbdctx_refresh_keymap(kc);
if (r < 0)
return r;
r = kbdctx_refresh_compose_table(kc, NULL);
if (r < 0)
return r;
if (c->sysbus) {
r = kbdctx_setup_bus(kc);
if (r < 0)
return r;
}
r = hashmap_put(c->data_map, KBDCTX_KEY, kc);
if (r < 0)
return r;
*out = kc;
kc = NULL;
return 0;
}
static int get_kbdctx(idev_context *c, kbdctx **out) {
kbdctx *kc;
assert_return(c, -EINVAL);
assert_return(out, -EINVAL);
kc = hashmap_get(c->data_map, KBDCTX_KEY);
if (kc) {
*out = kbdctx_ref(kc);
return 0;
}
return kbdctx_new(out, c);
}
/*
* Keyboard Devices
*/
bool idev_is_keyboard(idev_device *d) {
return d && d->vtable == &keyboard_vtable;
}
idev_device *idev_find_keyboard(idev_session *s, const char *name) {
char *kname;
assert_return(s, NULL);
assert_return(name, NULL);
kname = strappenda("keyboard/", name);
return hashmap_get(s->device_map, kname);
}
static int keyboard_raise_data(idev_keyboard *k, idev_data *data) {
idev_device *d = &k->device;
int r;
r = idev_session_raise_device_data(d->session, d, data);
if (r < 0)
log_debug_errno(r, "idev-keyboard: %s/%s: error while raising data event: %m",
d->session->name, d->name);
return r;
}
static int keyboard_resize_bufs(idev_keyboard *k, uint32_t n_syms) {
uint32_t *t;
if (n_syms <= k->n_syms)
return 0;
t = realloc(k->compose_res, sizeof(*t) * n_syms);
if (!t)
return -ENOMEM;
k->compose_res = t;
t = realloc(k->evdata.keyboard.keysyms, sizeof(*t) * n_syms);
if (!t)
return -ENOMEM;
k->evdata.keyboard.keysyms = t;
t = realloc(k->evdata.keyboard.codepoints, sizeof(*t) * n_syms);
if (!t)
return -ENOMEM;
k->evdata.keyboard.codepoints = t;
t = realloc(k->repdata.keyboard.keysyms, sizeof(*t) * n_syms);
if (!t)
return -ENOMEM;
k->repdata.keyboard.keysyms = t;
t = realloc(k->repdata.keyboard.codepoints, sizeof(*t) * n_syms);
if (!t)
return -ENOMEM;
k->repdata.keyboard.codepoints = t;
k->n_syms = n_syms;
return 0;
}
static unsigned int keyboard_read_compose(idev_keyboard *k, const xkb_keysym_t **out) {
_cleanup_free_ char *t = NULL;
term_utf8 u8 = { };
char buf[256], *p;
size_t flen = 0;
int i, r;
r = xkb_compose_state_get_utf8(k->xkb_compose, buf, sizeof(buf));
if (r >= (int)sizeof(buf)) {
t = malloc(r + 1);
if (!t)
return 0;
xkb_compose_state_get_utf8(k->xkb_compose, t, r + 1);
p = t;
} else {
p = buf;
}
for (i = 0; i < r; ++i) {
uint32_t *ucs;
size_t len, j;
len = term_utf8_decode(&u8, &ucs, p[i]);
if (len > 0) {
r = keyboard_resize_bufs(k, flen + len);
if (r < 0)
return 0;
for (j = 0; j < len; ++j)
k->compose_res[flen++] = ucs[j];
}
}
*out = k->compose_res;
return flen;
}
static void keyboard_arm(idev_keyboard *k, usec_t usecs) {
int r;
if (usecs != 0) {
usecs += now(CLOCK_MONOTONIC);
r = sd_event_source_set_time(k->repeat_timer, usecs);
if (r >= 0)
sd_event_source_set_enabled(k->repeat_timer, SD_EVENT_ONESHOT);
} else {
sd_event_source_set_enabled(k->repeat_timer, SD_EVENT_OFF);
}
}
static int keyboard_repeat_timer_fn(sd_event_source *source, uint64_t usec, void *userdata) {
idev_keyboard *k = userdata;
/* never feed REPEAT keys into COMPOSE */
keyboard_arm(k, k->repeat_rate);
return keyboard_raise_data(k, &k->repdata);
}
int idev_keyboard_new(idev_device **out, idev_session *s, const char *name) {
_cleanup_(idev_device_freep) idev_device *d = NULL;
idev_keyboard *k;
char *kname;
int r;
assert_return(out, -EINVAL);
assert_return(s, -EINVAL);
assert_return(name, -EINVAL);
k = new0(idev_keyboard, 1);
if (!k)
return -ENOMEM;
d = &k->device;
k->device = IDEV_DEVICE_INIT(&keyboard_vtable, s);
k->repeat_delay = 250 * USEC_PER_MSEC;
k->repeat_rate = 30 * USEC_PER_MSEC;
/* TODO: add key-repeat configuration */
r = get_kbdctx(s->context, &k->kbdctx);
if (r < 0)
return r;
r = keyboard_update_kbdmap(k);
if (r < 0)
return r;
r = keyboard_update_kbdtbl(k);
if (r < 0)
return r;
r = keyboard_resize_bufs(k, 8);
if (r < 0)
return r;
r = sd_event_add_time(s->context->event,
&k->repeat_timer,
CLOCK_MONOTONIC,
0,
10 * USEC_PER_MSEC,
keyboard_repeat_timer_fn,
k);
if (r < 0)
return r;
r = sd_event_source_set_enabled(k->repeat_timer, SD_EVENT_OFF);
if (r < 0)
return r;
kname = strappenda("keyboard/", name);
r = idev_device_add(d, kname);
if (r < 0)
return r;
if (out)
*out = d;
d = NULL;
return 0;
}
static void keyboard_free(idev_device *d) {
idev_keyboard *k = keyboard_from_device(d);
xkb_compose_state_unref(k->xkb_compose);
xkb_state_unref(k->xkb_state);
free(k->repdata.keyboard.codepoints);
free(k->repdata.keyboard.keysyms);
free(k->evdata.keyboard.codepoints);
free(k->evdata.keyboard.keysyms);
free(k->compose_res);
k->repeat_timer = sd_event_source_unref(k->repeat_timer);
k->kbdtbl = kbdtbl_unref(k->kbdtbl);
k->kbdmap = kbdmap_unref(k->kbdmap);
k->kbdctx = kbdctx_unref(k->kbdctx);
free(k);
}
static int8_t guess_ascii(struct xkb_state *state, uint32_t code, uint32_t n_syms, const uint32_t *syms) {
xkb_layout_index_t n_lo, lo;
xkb_level_index_t lv;
struct xkb_keymap *keymap;
const xkb_keysym_t *s;
int num;
if (n_syms == 1 && syms[0] < 128 && syms[0] > 0)
return syms[0];
keymap = xkb_state_get_keymap(state);
n_lo = xkb_keymap_num_layouts_for_key(keymap, code + KBDXKB_SHIFT);
for (lo = 0; lo < n_lo; ++lo) {
lv = xkb_state_key_get_level(state, code + KBDXKB_SHIFT, lo);
num = xkb_keymap_key_get_syms_by_level(keymap, code + KBDXKB_SHIFT, lo, lv, &s);
if (num == 1 && s[0] < 128 && s[0] > 0)
return s[0];
}
return -1;
}
static int keyboard_fill(idev_keyboard *k,
idev_data *dst,
bool resync,
uint16_t code,
uint32_t value,
uint32_t n_syms,
const uint32_t *keysyms) {
idev_data_keyboard *kev;
uint32_t i;
int r;
assert(dst == &k->evdata || dst == &k->repdata);
r = keyboard_resize_bufs(k, n_syms);
if (r < 0)
return r;
dst->type = IDEV_DATA_KEYBOARD;
dst->resync = resync;
kev = &dst->keyboard;
kev->ascii = guess_ascii(k->xkb_state, code, n_syms, keysyms);
kev->value = value;
kev->keycode = code;
kev->mods = 0;
kev->consumed_mods = 0;
kev->n_syms = n_syms;
memcpy(kev->keysyms, keysyms, sizeof(*keysyms) * n_syms);
for (i = 0; i < n_syms; ++i) {
kev->codepoints[i] = xkb_keysym_to_utf32(keysyms[i]);
if (!kev->codepoints[i])
kev->codepoints[i] = 0xffffffffUL;
}
for (i = 0; i < IDEV_KBDMOD_CNT; ++i) {
if (k->kbdmap->modmap[i] == XKB_MOD_INVALID)
continue;
r = xkb_state_mod_index_is_active(k->xkb_state, k->kbdmap->modmap[i], XKB_STATE_MODS_EFFECTIVE);
if (r > 0)
kev->mods |= 1 << i;
r = xkb_state_mod_index_is_consumed(k->xkb_state, code + KBDXKB_SHIFT, k->kbdmap->modmap[i]);
if (r > 0)
kev->consumed_mods |= 1 << i;
}
return 0;
}
static void keyboard_repeat(idev_keyboard *k) {
idev_data *evdata = &k->evdata;
idev_data *repdata = &k->repdata;
idev_data_keyboard *evkbd = &evdata->keyboard;
idev_data_keyboard *repkbd = &repdata->keyboard;
const xkb_keysym_t *keysyms;
idev_device *d = &k->device;
bool repeats;
int r, num;
if (evdata->resync) {
/*
* We received a re-sync event. During re-sync, any number of
* key-events may have been lost and sync-events may be
* re-ordered. Always disable key-repeat for those events. Any
* following event will trigger it again.
*/
k->repeating = false;
keyboard_arm(k, 0);
return;
}
repeats = xkb_keymap_key_repeats(k->kbdmap->xkb_keymap, evkbd->keycode + KBDXKB_SHIFT);
if (k->repeating && repkbd->keycode == evkbd->keycode) {
/*
* We received an event for the key we currently repeat. If it
* was released, stop key-repeat. Otherwise, ignore the event.
*/
if (evkbd->value == KBDKEY_UP) {
k->repeating = false;
keyboard_arm(k, 0);
}
} else if (evkbd->value == KBDKEY_DOWN && repeats) {
/*
* We received a key-down event for a key that repeats. The
* previous condition caught keys we already repeat, so we know
* this is a different key or no key-repeat is running. Start
* new key-repeat.
*/
errno = 0;
num = xkb_state_key_get_syms(k->xkb_state, evkbd->keycode + KBDXKB_SHIFT, &keysyms);
if (num < 0)
r = errno > 0 ? errno : -EFAULT;
else
r = keyboard_fill(k, repdata, false, evkbd->keycode, KBDKEY_REPEAT, num, keysyms);
if (r < 0) {
log_debug_errno(r, "idev-keyboard: %s/%s: cannot set key-repeat: %m",
d->session->name, d->name);
k->repeating = false;
keyboard_arm(k, 0);
} else {
k->repeating = true;
keyboard_arm(k, k->repeat_delay);
}
} else if (k->repeating && !repeats) {
/*
* We received an event for a key that does not repeat, but we
* currently repeat a previously received key. The new key is
* usually a modifier, but might be any kind of key. In this
* case, we continue repeating the old key, but update the
* symbols according to the new state.
*/
errno = 0;
num = xkb_state_key_get_syms(k->xkb_state, repkbd->keycode + KBDXKB_SHIFT, &keysyms);
if (num < 0)
r = errno > 0 ? errno : -EFAULT;
else
r = keyboard_fill(k, repdata, false, repkbd->keycode, KBDKEY_REPEAT, num, keysyms);
if (r < 0) {
log_debug_errno(r, "idev-keyboard: %s/%s: cannot update key-repeat: %m",
d->session->name, d->name);
k->repeating = false;
keyboard_arm(k, 0);
}
}
}
static int keyboard_feed_evdev(idev_keyboard *k, idev_data *data) {
struct input_event *ev = &data->evdev.event;
enum xkb_state_component compch;
enum xkb_compose_status cstatus;
const xkb_keysym_t *keysyms;
idev_device *d = &k->device;
int num, r;
if (ev->type != EV_KEY || ev->value > KBDKEY_DOWN)
return 0;
/* TODO: We should audit xkb-actions, whether they need @resync as
* flag. Most actions should just be executed, however, there might
* be actions that depend on modifier-orders. Those should be
* suppressed. */
num = xkb_state_key_get_syms(k->xkb_state, ev->code + KBDXKB_SHIFT, &keysyms);
compch = xkb_state_update_key(k->xkb_state, ev->code + KBDXKB_SHIFT, ev->value);
if (compch & XKB_STATE_LEDS) {
/* TODO: update LEDs */
}
if (num < 0) {
r = num;
goto error;
}
if (k->xkb_compose && ev->value == KBDKEY_DOWN) {
if (num == 1 && !data->resync) {
xkb_compose_state_feed(k->xkb_compose, keysyms[0]);
cstatus = xkb_compose_state_get_status(k->xkb_compose);
} else {
cstatus = XKB_COMPOSE_CANCELLED;
}
switch (cstatus) {
case XKB_COMPOSE_NOTHING:
/* keep produced keysyms and forward unchanged */
break;
case XKB_COMPOSE_COMPOSING:
/* consumed by compose-state, drop keysym */
keysyms = NULL;
num = 0;
break;
case XKB_COMPOSE_COMPOSED:
/* compose-state produced sth, replace keysym */
num = keyboard_read_compose(k, &keysyms);
xkb_compose_state_reset(k->xkb_compose);
break;
case XKB_COMPOSE_CANCELLED:
/* canceled compose, reset, forward cancellation sym */
xkb_compose_state_reset(k->xkb_compose);
break;
}
} else if (k->xkb_compose &&
num == 1 &&
keysyms[0] == XKB_KEY_Multi_key &&
!data->resync &&
ev->value == KBDKEY_UP) {
/* Reset compose state on Multi-Key UP events. This effectively
* requires you to hold the key during the whole sequence. I
* think it's pretty handy to avoid accidental
* Compose-sequences, but this may break Compose for disabled
* people. We really need to make this opional! (TODO) */
xkb_compose_state_reset(k->xkb_compose);
}
if (ev->value == KBDKEY_UP) {
/* never produce keysyms for UP */
keysyms = NULL;
num = 0;
}
r = keyboard_fill(k, &k->evdata, data->resync, ev->code, ev->value, num, keysyms);
if (r < 0)
goto error;
keyboard_repeat(k);
return keyboard_raise_data(k, &k->evdata);
error:
log_debug_errno(r, "idev-keyboard: %s/%s: cannot handle event: %m",
d->session->name, d->name);
k->repeating = false;
keyboard_arm(k, 0);
return 0;
}
static int keyboard_feed(idev_device *d, idev_data *data) {
idev_keyboard *k = keyboard_from_device(d);
switch (data->type) {
case IDEV_DATA_RESYNC:
/*
* If the underlying device is re-synced, key-events might be
* sent re-ordered. Thus, we don't know which key was pressed
* last. Key-repeat might get confused, hence, disable it
* during re-syncs. The first following event will enable it
* again.
*/
k->repeating = false;
keyboard_arm(k, 0);
return 0;
case IDEV_DATA_EVDEV:
return keyboard_feed_evdev(k, data);
default:
return 0;
}
}
static int keyboard_update_kbdmap(idev_keyboard *k) {
idev_device *d = &k->device;
struct xkb_state *state;
kbdmap *km;
int r;
assert(k);
km = k->kbdctx->kbdmap;
if (km == k->kbdmap)
return 0;
errno = 0;
state = xkb_state_new(km->xkb_keymap);
if (!state) {
r = errno > 0 ? -errno : -EFAULT;
goto error;
}
kbdmap_unref(k->kbdmap);
k->kbdmap = kbdmap_ref(km);
xkb_state_unref(k->xkb_state);
k->xkb_state = state;
/* TODO: On state-change, we should trigger a resync so the whole
* event-state is flushed into the new xkb-state. libevdev currently
* does not support that, though. */
return 0;
error:
return log_debug_errno(r, "idev-keyboard: %s/%s: cannot adopt new keymap: %m",
d->session->name, d->name);
}
static int keyboard_update_kbdtbl(idev_keyboard *k) {
idev_device *d = &k->device;
struct xkb_compose_state *compose = NULL;
kbdtbl *kt;
int r;
assert(k);
kt = k->kbdctx->kbdtbl;
if (kt == k->kbdtbl)
return 0;
if (kt) {
errno = 0;
compose = xkb_compose_state_new(kt->xkb_compose_table, XKB_COMPOSE_STATE_NO_FLAGS);
if (!compose) {
r = errno > 0 ? -errno : -EFAULT;
goto error;
}
}
kbdtbl_unref(k->kbdtbl);
k->kbdtbl = kbdtbl_ref(kt);
xkb_compose_state_unref(k->xkb_compose);
k->xkb_compose = compose;
return 0;
error:
return log_debug_errno(r, "idev-keyboard: %s/%s: cannot adopt new compose table: %m",
d->session->name, d->name);
}
static const idev_device_vtable keyboard_vtable = {
.free = keyboard_free,
.feed = keyboard_feed,
};
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