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#include <stdbool.h>
#include <stddef.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include "list.h"
#include "log.h"
#include "stringop.h"
#include "swaybar/tray/watcher.h"
static const char *obj_path = "/StatusNotifierWatcher";
static bool using_standard_protocol(struct swaybar_watcher *watcher) {
return watcher->interface[strlen("org.")] == 'f'; // freedesktop
}
static int cmp_id(const void *item, const void *cmp_to) {
return strcmp(item, cmp_to);
}
static int handle_lost_service(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 (!*new_owner) {
struct swaybar_watcher *watcher = data;
for (int idx = 0; idx < watcher->items->length; ++idx) {
char *id = watcher->items->items[idx];
int cmp_res = using_standard_protocol(watcher) ?
cmp_id(id, service) : strncmp(id, service, strlen(service));
if (cmp_res == 0) {
sway_log(SWAY_DEBUG, "Unregistering Status Notifier Item '%s'", id);
list_del(watcher->items, idx--);
sd_bus_emit_signal(watcher->bus, obj_path, watcher->interface,
"StatusNotifierItemUnregistered", "s", id);
free(id);
if (using_standard_protocol(watcher)) {
break;
}
}
}
int idx = list_seq_find(watcher->hosts, cmp_id, service);
if (idx != -1) {
sway_log(SWAY_DEBUG, "Unregistering Status Notifier Host '%s'", service);
free(watcher->hosts->items[idx]);
list_del(watcher->hosts, idx);
}
}
return 0;
}
static int register_sni(sd_bus_message *msg, void *data, sd_bus_error *error) {
char *service_or_path, *id;
int ret = sd_bus_message_read(msg, "s", &service_or_path);
if (ret < 0) {
sway_log(SWAY_ERROR, "Failed to parse register SNI message: %s", strerror(-ret));
return ret;
}
struct swaybar_watcher *watcher = data;
if (using_standard_protocol(watcher)) {
id = strdup(service_or_path);
} else {
const char *service, *path;
if (service_or_path[0] == '/') {
service = sd_bus_message_get_sender(msg);
path = service_or_path;
} else {
service = service_or_path;
path = "/StatusNotifierItem";
}
id = format_str("%s%s", service, path);
}
if (list_seq_find(watcher->items, cmp_id, id) == -1) {
sway_log(SWAY_DEBUG, "Registering Status Notifier Item '%s'", id);
list_add(watcher->items, id);
sd_bus_emit_signal(watcher->bus, obj_path, watcher->interface,
"StatusNotifierItemRegistered", "s", id);
} else {
sway_log(SWAY_DEBUG, "Status Notifier Item '%s' already registered", id);
free(id);
}
return sd_bus_reply_method_return(msg, "");
}
static int register_host(sd_bus_message *msg, void *data, sd_bus_error *error) {
char *service;
int ret = sd_bus_message_read(msg, "s", &service);
if (ret < 0) {
sway_log(SWAY_ERROR, "Failed to parse register host message: %s", strerror(-ret));
return ret;
}
struct swaybar_watcher *watcher = data;
if (list_seq_find(watcher->hosts, cmp_id, service) == -1) {
sway_log(SWAY_DEBUG, "Registering Status Notifier Host '%s'", service);
list_add(watcher->hosts, strdup(service));
sd_bus_emit_signal(watcher->bus, obj_path, watcher->interface,
"StatusNotifierHostRegistered", "");
} else {
sway_log(SWAY_DEBUG, "Status Notifier Host '%s' already registered", service);
}
return sd_bus_reply_method_return(msg, "");
}
static int get_registered_snis(sd_bus *bus, const char *obj_path,
const char *interface, const char *property, sd_bus_message *reply,
void *data, sd_bus_error *error) {
struct swaybar_watcher *watcher = data;
list_add(watcher->items, NULL); // strv expects NULL-terminated string array
int ret = sd_bus_message_append_strv(reply, (char **)watcher->items->items);
list_del(watcher->items, watcher->items->length - 1);
return ret;
}
static int is_host_registered(sd_bus *bus, const char *obj_path,
const char *interface, const char *property, sd_bus_message *reply,
void *data, sd_bus_error *error) {
struct swaybar_watcher *watcher = data;
int val = watcher->hosts->length > 0; // dbus expects int rather than bool
return sd_bus_message_append_basic(reply, 'b', &val);
}
static const sd_bus_vtable watcher_vtable[] = {
SD_BUS_VTABLE_START(0),
SD_BUS_METHOD("RegisterStatusNotifierItem", "s", "", register_sni,
SD_BUS_VTABLE_UNPRIVILEGED),
SD_BUS_METHOD("RegisterStatusNotifierHost", "s", "", register_host,
SD_BUS_VTABLE_UNPRIVILEGED),
SD_BUS_PROPERTY("RegisteredStatusNotifierItems", "as", get_registered_snis,
0, SD_BUS_VTABLE_PROPERTY_EMITS_CHANGE),
SD_BUS_PROPERTY("IsStatusNotifierHostRegistered", "b", is_host_registered,
0, SD_BUS_VTABLE_PROPERTY_EMITS_CHANGE),
SD_BUS_PROPERTY("ProtocolVersion", "i", NULL,
offsetof(struct swaybar_watcher, version),
SD_BUS_VTABLE_PROPERTY_CONST),
SD_BUS_SIGNAL("StatusNotifierItemRegistered", "s", 0),
SD_BUS_SIGNAL("StatusNotifierItemUnregistered", "s", 0),
SD_BUS_SIGNAL("StatusNotifierHostRegistered", NULL, 0),
SD_BUS_VTABLE_END
};
struct swaybar_watcher *create_watcher(char *protocol, sd_bus *bus) {
struct swaybar_watcher *watcher =
calloc(1, sizeof(struct swaybar_watcher));
if (!watcher) {
return NULL;
}
watcher->interface = format_str("org.%s.StatusNotifierWatcher", protocol);
sd_bus_slot *signal_slot = NULL, *vtable_slot = NULL;
int ret = sd_bus_add_object_vtable(bus, &vtable_slot, obj_path,
watcher->interface, watcher_vtable, watcher);
if (ret < 0) {
sway_log(SWAY_ERROR, "Failed to add object vtable: %s", strerror(-ret));
goto error;
}
ret = sd_bus_match_signal(bus, &signal_slot, "org.freedesktop.DBus",
"/org/freedesktop/DBus", "org.freedesktop.DBus",
"NameOwnerChanged", handle_lost_service, watcher);
if (ret < 0) {
sway_log(SWAY_ERROR, "Failed to subscribe to unregistering events: %s",
strerror(-ret));
goto error;
}
ret = sd_bus_request_name(bus, watcher->interface, 0);
if (ret < 0) {
if (-ret == EEXIST) {
sway_log(SWAY_DEBUG, "Failed to acquire service name '%s':"
"another tray is already running", watcher->interface);
} else {
sway_log(SWAY_ERROR, "Failed to acquire service name '%s': %s",
watcher->interface, strerror(-ret));
}
goto error;
}
sd_bus_slot_set_floating(signal_slot, 0);
sd_bus_slot_set_floating(vtable_slot, 0);
watcher->bus = bus;
watcher->hosts = create_list();
watcher->items = create_list();
watcher->version = 0;
sway_log(SWAY_DEBUG, "Registered %s", watcher->interface);
return watcher;
error:
sd_bus_slot_unref(signal_slot);
sd_bus_slot_unref(vtable_slot);
destroy_watcher(watcher);
return NULL;
}
void destroy_watcher(struct swaybar_watcher *watcher) {
if (!watcher) {
return;
}
list_free_items_and_destroy(watcher->hosts);
list_free_items_and_destroy(watcher->items);
free(watcher->interface);
free(watcher);
}
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