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#define _POSIX_C_SOURCE 200809L
#include <stdbool.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <unistd.h>
#include "swaybar/bar.h"
#include "swaybar/tray/host.h"
#include "swaybar/tray/item.h"
#include "swaybar/tray/tray.h"
#include "list.h"
#include "log.h"
static const char *watcher_path = "/StatusNotifierWatcher";
static int cmp_sni_id(const void *item, const void *cmp_to) {
const struct swaybar_sni *sni = item;
return strcmp(sni->watcher_id, cmp_to);
}
static void add_sni(struct swaybar_tray *tray, char *id) {
int idx = list_seq_find(tray->items, cmp_sni_id, id);
if (idx == -1) {
sway_log(SWAY_INFO, "Registering Status Notifier Item '%s'", id);
struct swaybar_sni *sni = create_sni(id, tray);
if (sni) {
list_add(tray->items, sni);
}
}
}
static int handle_sni_registered(sd_bus_message *msg, void *data,
sd_bus_error *error) {
char *id;
int ret = sd_bus_message_read(msg, "s", &id);
if (ret < 0) {
sway_log(SWAY_ERROR, "Failed to parse register SNI message: %s", strerror(-ret));
}
struct swaybar_tray *tray = data;
add_sni(tray, id);
return ret;
}
static int handle_sni_unregistered(sd_bus_message *msg, void *data,
sd_bus_error *error) {
char *id;
int ret = sd_bus_message_read(msg, "s", &id);
if (ret < 0) {
sway_log(SWAY_ERROR, "Failed to parse unregister SNI message: %s", strerror(-ret));
}
struct swaybar_tray *tray = data;
int idx = list_seq_find(tray->items, cmp_sni_id, id);
if (idx != -1) {
sway_log(SWAY_INFO, "Unregistering Status Notifier Item '%s'", id);
destroy_sni(tray->items->items[idx]);
list_del(tray->items, idx);
set_bar_dirty(tray->bar);
}
return ret;
}
static int get_registered_snis_callback(sd_bus_message *msg, void *data,
sd_bus_error *error) {
if (sd_bus_message_is_method_error(msg, NULL)) {
sd_bus_error err = *sd_bus_message_get_error(msg);
sway_log(SWAY_ERROR, "Failed to get registered SNIs: %s", err.message);
return -sd_bus_error_get_errno(&err);
}
int ret = sd_bus_message_enter_container(msg, 'v', NULL);
if (ret < 0) {
sway_log(SWAY_ERROR, "Failed to read registered SNIs: %s", strerror(-ret));
return ret;
}
char **ids;
ret = sd_bus_message_read_strv(msg, &ids);
if (ret < 0) {
sway_log(SWAY_ERROR, "Failed to read registered SNIs: %s", strerror(-ret));
return ret;
}
if (ids) {
struct swaybar_tray *tray = data;
for (char **id = ids; *id; ++id) {
add_sni(tray, *id);
}
}
return ret;
}
static bool register_to_watcher(struct swaybar_host *host) {
// this is called asynchronously in case the watcher is owned by this process
int ret = sd_bus_call_method_async(host->tray->bus, NULL,
host->watcher_interface, watcher_path, host->watcher_interface,
"RegisterStatusNotifierHost", NULL, NULL, "s", host->service);
if (ret < 0) {
sway_log(SWAY_ERROR, "Failed to send register call: %s", strerror(-ret));
return false;
}
ret = sd_bus_call_method_async(host->tray->bus, NULL,
host->watcher_interface, watcher_path,
"org.freedesktop.DBus.Properties", "Get",
get_registered_snis_callback, host->tray, "ss",
host->watcher_interface, "RegisteredStatusNotifierItems");
if (ret < 0) {
sway_log(SWAY_ERROR, "Failed to get registered SNIs: %s", strerror(-ret));
}
return ret >= 0;
}
static int handle_new_watcher(sd_bus_message *msg,
void *data, sd_bus_error *error) {
char *service, *old_owner, *new_owner;
int ret = sd_bus_message_read(msg, "sss", &service, &old_owner, &new_owner);
if (ret < 0) {
sway_log(SWAY_ERROR, "Failed to parse owner change message: %s", strerror(-ret));
return ret;
}
if (!*old_owner) {
struct swaybar_host *host = data;
if (strcmp(service, host->watcher_interface) == 0) {
register_to_watcher(host);
}
}
return 0;
}
bool init_host(struct swaybar_host *host, char *protocol,
struct swaybar_tray *tray) {
size_t len = snprintf(NULL, 0, "org.%s.StatusNotifierWatcher", protocol) + 1;
host->watcher_interface = malloc(len);
if (!host->watcher_interface) {
return false;
}
snprintf(host->watcher_interface, len, "org.%s.StatusNotifierWatcher", protocol);
sd_bus_slot *reg_slot = NULL, *unreg_slot = NULL, *watcher_slot = NULL;
int ret = sd_bus_match_signal(tray->bus, ®_slot, host->watcher_interface,
watcher_path, host->watcher_interface,
"StatusNotifierItemRegistered", handle_sni_registered, tray);
if (ret < 0) {
sway_log(SWAY_ERROR, "Failed to subscribe to registering events: %s",
strerror(-ret));
goto error;
}
ret = sd_bus_match_signal(tray->bus, &unreg_slot, host->watcher_interface,
watcher_path, host->watcher_interface,
"StatusNotifierItemUnregistered", handle_sni_unregistered, tray);
if (ret < 0) {
sway_log(SWAY_ERROR, "Failed to subscribe to unregistering events: %s",
strerror(-ret));
goto error;
}
ret = sd_bus_match_signal(tray->bus, &watcher_slot, "org.freedesktop.DBus",
"/org/freedesktop/DBus", "org.freedesktop.DBus", "NameOwnerChanged",
handle_new_watcher, host);
if (ret < 0) {
sway_log(SWAY_ERROR, "Failed to subscribe to unregistering events: %s",
strerror(-ret));
goto error;
}
pid_t pid = getpid();
size_t service_len = snprintf(NULL, 0, "org.%s.StatusNotifierHost-%d",
protocol, pid) + 1;
host->service = malloc(service_len);
if (!host->service) {
goto error;
}
snprintf(host->service, service_len, "org.%s.StatusNotifierHost-%d", protocol, pid);
ret = sd_bus_request_name(tray->bus, host->service, 0);
if (ret < 0) {
sway_log(SWAY_DEBUG, "Failed to acquire service name: %s", strerror(-ret));
goto error;
}
host->tray = tray;
if (!register_to_watcher(host)) {
goto error;
}
sd_bus_slot_set_floating(reg_slot, 0);
sd_bus_slot_set_floating(unreg_slot, 0);
sd_bus_slot_set_floating(watcher_slot, 0);
sway_log(SWAY_DEBUG, "Registered %s", host->service);
return true;
error:
sd_bus_slot_unref(reg_slot);
sd_bus_slot_unref(unreg_slot);
sd_bus_slot_unref(watcher_slot);
finish_host(host);
return false;
}
void finish_host(struct swaybar_host *host) {
sd_bus_release_name(host->tray->bus, host->service);
free(host->service);
free(host->watcher_interface);
}
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