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auto detect dark theme change via dbus signals

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maelstrom 2026-04-16 23:05:41 +02:00 • committed by Nishi
commit 138555f41d
3 changed files with 86 additions and 7 deletions
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63
src/lowlevel.c
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@ -176,6 +176,69 @@ MWDECL MwBool MwLLDBusPortalGet(MwLLDBusFuncTable* tbl, MwLLDBusContext* ctx, co
return MwTRUE;
}
MWDECL MwBool MwLLDBusPortalWatch(MwLLDBusFuncTable* tbl, MwLLDBusContext* ctx, const char* portal) {
if(!ctx->dbus_conn) {
return MwFALSE;
}
char filter_string[2048];
MwStringPrintIntoBuffer(filter_string, sizeof(filter_string), "type='%s',interface=%s", "signal", portal);
dbus_bus_add_match(ctx->dbus_conn, filter_string, &ctx->dbus_err);
dbus_connection_flush(ctx->dbus_conn);
return MwTRUE;
}
// Technically this will swallow all other results, so this is not usable multiple times.
// TODO: Use a hashmap instead
MWDECL MwBool MwLLDBusPortalPoll(MwLLDBusFuncTable* tbl, MwLLDBusContext* ctx, MwLL handle, const char* portal, const char* namespace, const char* key, MwLLDBusPortalPollListener listener) {
DBusMessage* msg;
DBusMessageIter args, msg_value;
const char* msg_namespace;
const char* msg_key;
MwU32 msg_value_content;
if(!ctx->dbus_conn) {
return MwFALSE;
}
dbus_connection_read_write(ctx->dbus_conn, 0);
msg = dbus_connection_pop_message(ctx->dbus_conn);
if (NULL == msg) {
return MwFALSE;
}
// check if the message is a signal from the correct interface and with the correct name
if (dbus_message_is_signal(msg, portal, "SettingChanged")) {
// read the parameters
if (!dbus_message_iter_init(msg, &args))
fprintf(stderr, "[WARNING] Message has no arguments\n");
else if (DBUS_TYPE_STRING != dbus_message_iter_get_arg_type(&args))
fprintf(stderr, "[WARNING] Argument is not string\n");
else {
dbus_message_iter_get_basic(&args, &msg_namespace);
dbus_message_iter_next(&args);
dbus_message_iter_get_basic(&args, &msg_key);
// Check that key and namespace match
if (strcmp(msg_namespace, namespace) == 0 && strcmp(msg_key, key) == 0) {
// Assuming the value is a basic type
dbus_message_iter_next(&args);
dbus_message_iter_recurse(&args, &msg_value);
dbus_message_iter_get_basic(&msg_value, &msg_value_content);
listener(handle, msg_value_content);
}
}
}
// free the message
dbus_message_unref(msg);
}
void MwLLDBusFreeContext(MwLLDBusFuncTable* tbl, MwLLDBusContext* ctx) {
if(!tbl->lib) {
return;