/**
* _nm_dbus_signal_connect_data:
* @proxy: a #GDBusProxy
* @signal_name: the D-Bus signal to connect to
* @signature: (allow-none): the signal's type signature (must be a tuple)
* @c_handler: the signal handler function
* @data: (allow-none): data to pass to @c_handler
* @destroy_data: (allow-none): closure destroy notify for @data
* @connect_flags: connection flags
*
* Connects to the D-Bus signal @signal_name on @proxy. @c_handler must be a
* void function whose first argument is a #GDBusProxy, followed by arguments
* for each element of @signature, ending with a #gpointer argument for @data.
*
* The argument types in @c_handler correspond to the types output by
* g_dbus_gvariant_to_gvalue(), except for 'ay' and 'aay'. In particular:
* - both 16-bit and 32-bit integers are passed as #gint/#guint
* - 'as' values are passed as #GStrv (char **)
* - all other array, tuple, and dict types are passed as #GVariant
*
* If @signature is %NULL, then the signal's parameters will be ignored, and
* @c_handler should take only the #GDBusProxy and #gpointer arguments.
*
* Returns: the signal handler ID, which can be used with
* g_signal_handler_remove(). Beware that because of the way the signal is
* connected, you will not be able to remove it with
* g_signal_handlers_disconnect_by_func(), although
* g_signal_handlers_disconnect_by_data() will work correctly.
*/
gulong
_nm_dbus_signal_connect_data (GDBusProxy *proxy,
const char *signal_name,
const GVariantType *signature,
GCallback c_handler,
gpointer data,
GClosureNotify destroy_data,
GConnectFlags connect_flags)
{
NMDBusSignalData *sd;
GClosure *closure;
gboolean swapped = !!(connect_flags & G_CONNECT_SWAPPED);
gboolean after = !!(connect_flags & G_CONNECT_AFTER);
g_return_val_if_fail (G_IS_DBUS_PROXY (proxy), 0);
g_return_val_if_fail (signal_name != NULL, 0);
g_return_val_if_fail (signature == NULL || g_variant_type_is_tuple (signature), 0);
g_return_val_if_fail (c_handler != NULL, 0);
sd = g_slice_new (NMDBusSignalData);
sd->signal_name = g_strdup (signal_name);
sd->signature = signature;
closure = (swapped ? g_cclosure_new_swap : g_cclosure_new) (c_handler, data, destroy_data);
g_closure_set_marshal (closure, g_cclosure_marshal_generic);
g_closure_set_meta_marshal (closure, sd, dbus_signal_meta_marshal);
g_closure_add_finalize_notifier (closure, sd, dbus_signal_data_free);
return g_signal_connect_closure (proxy, "g-signal", closure, after);
}
static inline GClosure *createCppClosure(ClosureDataBase *closureData)
{
GClosure *closure = g_closure_new_simple(sizeof(GClosure), closureData);
g_closure_set_marshal(closure, &c_marshaller);
g_closure_add_finalize_notifier(closure, NULL, &closureDestroyNotify);
g_closure_ref(closure);
g_closure_sink(closure);
return closure;
}
/*
Creates a new closure which invokes callback_func with user_data as the last parameter.
创建GCClosure, 并初始化
但仍返回GClosure
*/
GClosure*
g_cclosure_new (GCallback callback_func,
gpointer user_data,
GClosureNotify destroy_data)
{
closure = g_closure_new_simple (sizeof (GCClosure), user_data);
g_closure_add_finalize_notifier (closure, user_data, destroy_data);
((GCClosure*) closure)->callback = (gpointer) callback_func;
}
GClosure*
gjs_closure_new(JSContext *context,
JSObject *callable,
const char *description,
gboolean root_function)
{
Closure *c;
c = (Closure*) g_closure_new_simple(sizeof(Closure), NULL);
c->runtime = JS_GetRuntime(context);
/* The saved context is used for lifetime management, so that the closure will
* be torn down with the context that created it. The context could be attached to
* the default context of the runtime using if we wanted the closure to survive
* the context that created it.
*/
c->context = context;
JS_BeginRequest(context);
c->obj = callable;
c->unref_on_global_object_finalized = FALSE;
GJS_INC_COUNTER(closure);
/* the finalize notifier right now is purely to track the counter
* of how many closures are alive.
*/
g_closure_add_finalize_notifier(&c->base, NULL, closure_finalized);
if (root_function) {
/* Fully manage closure lifetime if so asked */
gjs_keep_alive_add_global_child(context,
global_context_finalized,
c->obj,
c);
g_closure_add_invalidate_notifier(&c->base, NULL, closure_invalidated);
} else {
/* Only mark the closure as invalid if memory is managed
outside (i.e. by object.c for signals) */
g_closure_add_invalidate_notifier(&c->base, NULL, closure_set_invalid);
}
gjs_debug_closure("Create closure %p which calls object %p '%s'",
c, c->obj, description);
JS_EndRequest(context);
return &c->base;
}
/**
* g_cclosure_new: (skip)
* @callback_func: the function to invoke
* @user_data: user data to pass to @callback_func
* @destroy_data: destroy notify to be called when @user_data is no longer used
*
* Creates a new closure which invokes @callback_func with @user_data as
* the last parameter.
*
* Returns: a new #GCClosure
*/
GClosure*
g_cclosure_new (GCallback callback_func,
gpointer user_data,
GClosureNotify destroy_data)
{
GClosure *closure;
g_return_val_if_fail (callback_func != NULL, NULL);
closure = g_closure_new_simple (sizeof (GCClosure), user_data);
if (destroy_data)
g_closure_add_finalize_notifier (closure, user_data, destroy_data);
((GCClosure*) closure)->callback = (gpointer) callback_func;
return closure;
}
static inline GClosure* mgtk_closure_new(gpointer callback_id) {
GClosure *closure;
/* printf("register id = %i\n",(int) callback_id);
*/
closure = g_closure_new_simple(sizeof(GClosure),
callback_id);
g_closure_set_marshal (closure, mgtk_callback_dispatch);
g_closure_add_finalize_notifier (closure,
callback_id,
mgtk_callback_destroy);
return closure;
}
/**
* Create one of our custom GClosure subclasses. To save us having to export
* it, however, we just return the GClosure* that it extends.
*/
GClosure*
bindings_java_closure_new
(
JNIEnv* env,
jobject handler,
jclass receiver,
const gchar* name,
guint id
)
{
GClosure* closure;
BindingsJavaClosure* bjc;
GSignalQuery info;
GString* buf;
guint i;
gchar* methodName;
gchar* methodSignature;
/*
* First we allocate the closure and do the footwork to tell it what
* its marshaller is
*/
closure = g_closure_new_simple(sizeof(BindingsJavaClosure), NULL);
g_closure_add_finalize_notifier(closure, NULL, bindings_java_closure_destroy);
g_closure_set_marshal(closure, bindings_java_marshaller);
bjc = (BindingsJavaClosure*) closure;
/*
* And now we begin the legwork of figuring out what the methodID of
* the callback to be invoked is and caching that in the closure. We
* get the GSignalQuery data for the specified signal and then use that
* to formulate a string that can be use to lookup the method.
*/
g_signal_query(id, &info);
switch(G_TYPE_FUNDAMENTAL(info.return_type)) {
case G_TYPE_BOOLEAN:
bjc->returnType = 'Z';
break;
case G_TYPE_INT:
bjc->returnType = 'I';
break;
case G_TYPE_ENUM:
bjc->returnType = 'E';
break;
case G_TYPE_STRING:
/*
* Strings are encoded as java.lang.String objects in signatures,
* so we use the object type marker for gchar* (only).
*/
bjc->returnType = 'L';
break;
case G_TYPE_NONE:
bjc->returnType = 'V';
break;
default:
g_critical("Don't know what to do with signal return type %s", g_type_name(info.return_type));
return NULL;
}
/*
* the name of the methods we invoke is algorithmic: "receiveName",
* where Name is a PascalCase version of the signal name we were
* passed in.
*/
buf = g_string_new("receive");
gchar** tokens = g_strsplit_set(name, "_-:", -1);
for (i = 0; i < g_strv_length(tokens); i++) {
gchar* token = tokens[i];
if (token[0] == '\0') {
// skip past :: which splits signal name from "detail"
continue;
}
gchar first = g_unichar_toupper(token[0]);
g_string_append_c(buf, first);
token++;
g_string_append(buf, token);
}
methodName = buf->str;
g_string_free(buf, FALSE);
g_strfreev(tokens);
/*
* And here is the tricky bit: formulate the method signature that goes
* along with this signal. A method of the signature
*
* boolean method(int, long, String)
*
* has a JNI encoding of
*
* (IJLjava/util/String;)Z
*/
buf = g_string_new("(Lorg/gnome/glib/Signal;J");
// add the signature for each parameter type
for(i = 0; i < info.n_params; i++) {
g_string_append(buf, bindings_java_typeToSignature(info.param_types[i]));
}
// and the return type
g_string_append(buf, ")");
g_string_append(buf, bindings_java_typeToSignature(info.return_type));
methodSignature = buf->str;
g_string_free(buf, FALSE);
/*
* Now at last we can lookup the method ID
*/
// jclass CANDIDATE = (*env)->FindClass(env, "org/gnome/gtk/GtkWidget");
// if ((*env)->IsSameObject(env, CANDIDATE, receiver)) {
// g_debug("Received a GtkWidget");
// }
bjc->receiver = receiver;
bjc->method = (*env)->GetStaticMethodID(env, bjc->receiver, methodName, methodSignature);
// g_debug("Looking for\nJava method %s\nwith signature %s\nin class %s\nto handle signal %s\n",
// methodName, methodSignature, "FIXME", g_signal_name(id));
// clean up
g_free(methodName);
g_free(methodSignature);
// and check for error
if (bjc->method == NULL) {
// Exception already thrown by GetMethodID
return NULL;
}
/*
* Set the reference so that the marshaller can find the Signal instance.
*/
bjc->handler = (*env)->NewWeakGlobalRef(env, handler);
/*
* And we're done!
*/
return closure;
}
EditorClientFrameDestructionObserver(Frame* frame, GClosure* closure)
: FrameDestructionObserver(frame)
, m_closure(closure)
{
g_closure_add_finalize_notifier(m_closure, this, destroyOnClosureFinalization);
}
