Optionalproperties: Partial<JavaScriptCore.Value.ConstructorProps>Internal$signalsCompile-time signal type information.
This instance property is generated only for TypeScript type checking. It is not defined at runtime and should not be accessed in JS code.
Static$gtypeConstruct OnlycontextThe JavaScriptCore.Context in which the value was created.
Gets a pointer to memory that contains the array buffer data.
Obtains a pointer to the memory region that holds the contents of the
%ArrayBuffer; modifications done to the data will be visible to JavaScript
code. If size is not null, the size in bytes of the memory region
will also be stored in the pointed location.
Note that the pointer returned by this function is not guaranteed to remain
the same after calls to other JSC API functions. If you plan to access the
data of the %ArrayBuffer later, you can keep a reference to the value and
obtain the data pointer at a later point. Keep in mind that if JavaScript
code has a chance to run, for example due to main loop events that result
in JSC being called, the contents of the memory region might be modified in
the meantime. Consider taking a copy of the data and using the copy instead
in asynchronous code.
pointer to memory.
Gets the size in bytes of the array buffer.
Obtains the size in bytes of the memory region that holds the contents of an %ArrayBuffer.
size, in bytes.
SignalconnectSignalconnect_Invoke value. If n_parameters
is 0 no parameters will be passed to the constructor.
Optionalparameters: JavaScriptCore.Value[]the JavaScriptCore.Values to pass as parameters to the constructor, or null
a JavaScriptCore.Value referencing the newly created object instance.
SignalemitCall function referenced by value, passing the given parameters. If n_parameters
is 0 no parameters will be passed to the function.
This function always returns a JavaScriptCore.Value, in case of void functions a JavaScriptCore.Value referencing
Optionalparameters: JavaScriptCore.Value[]the JavaScriptCore.Values to pass as parameters to the function, or null
a JavaScriptCore.Value with the return value of the function.
Get the JavaScriptCore.Context in which value was created.
the JavaScriptCore.Value context.
Get whether the value referenced by value is an array.
whether the value is an array.
Check whether the value is an %ArrayBuffer.
whether the value is an %ArrayBuffer
Get whether the value referenced by value is a boolean.
whether the value is a boolean.
Get whether the value referenced by value is a constructor.
whether the value is a constructor.
Get whether the value referenced by value is a function
whether the value is a function.
Get whether the value referenced by value is
whether the value is null.
Get whether the value referenced by value is a number.
whether the value is a number.
Get whether the value referenced by value is an object.
whether the value is an object.
Get whether the value referenced by value is a string
whether the value is a string
Determines whether a value is a typed array.
Whether value is a typed array.
Get whether the value referenced by value is
whether the value is undefined.
Create a new typed array value with elements from an array buffer.
Create a JavaScriptCore.Value referencing a new typed array value containing
elements of the given type, where the elements are stored at the memory
region represented by the array_buffer.
The type must not be JavaScriptCore.TypedArrayType.NONE.
The offset and length parameters can be used to indicate which part of
the array buffer can be accessed through the typed array. If both are
omitted (passing zero as offset, and -1 as length), the whole
array_buffer is exposed through the typed array. Omitting the length
with a non-zero offset will expose the remainder of the array_buffer
starting at the indicated offset.
type of array elements.
offset, in bytes.
number of array elements, or -1.
Define or modify a property with property_name in object referenced by value. When the
property value needs to be getted or set, getter and setter callbacks will be called.
When the property is cleared in the JavaScriptCore.Class context, destroy_notify is called with
user_data as parameter. This is equivalent to JavaScript
Note that the value returned by getter must be fully transferred. In case of boxed types, you could use
G_TYPE_POINTER instead of the actual boxed GObject.GType to ensure that the instance owned by JavaScriptCore.Class is used.
If you really want to return a new copy of the boxed type, use #JSC_TYPE_VALUE and return a JavaScriptCore.Value created
with jsc_value_new_object() that receives the copy as instance parameter.
Note that getter and setter are called as functions and not methods, so they don't receive an instance as
first parameter. Use jsc_class_add_property() if you want to add property accessor invoked as a method.
the name of the property to define
the GObject.GType of the property
Optionalgetter: GObject.Callbacka GObject.Callback to be called to get the property value
Optionalsetter: GObject.Callbacka GObject.Callback to be called to set the property value
Optionaldestroy_notify: DestroyNotifydestroy notifier for user_data
Define or modify a property with property_name in object referenced by value. This is equivalent to
JavaScript
the name of the property to define
Optionalproperty_value: JavaScriptCore.Valuethe default property value
Try to delete property with name from value. This function will return false if
the property was defined without JavaScriptCore.ValuePropertyFlags.CONFIGURABLE flag.
the property name
true if the property was deleted, or false otherwise.
Get the list of property names of value. Only properties defined with JavaScriptCore.ValuePropertyFlags.ENUMERABLE
flag will be collected.
a null-terminated array of strings containing the property names, or null if value doesn't have enumerable properties. Use g_strfreev() to free.
Get property with name from value.
the property name
the property JavaScriptCore.Value.
Get property at index from value.
the property index
the property JavaScriptCore.Value.
Get whether value has property with name.
the property name
true if value has a property with name, or false otherwise
Invoke method with name on object referenced by value, passing the given parameters. If
n_parameters is 0 no parameters will be passed to the method.
The object instance will be handled automatically even when the method is a custom one
registered with jsc_class_add_method(), so it should never be passed explicitly as parameter
of this function.
This function always returns a JavaScriptCore.Value, in case of void methods a JavaScriptCore.Value referencing
the method name
Optionalparameters: JavaScriptCore.Value[]the JavaScriptCore.Values to pass as parameters to the method, or null
a JavaScriptCore.Value with the return value of the method.
Get whether the value referenced by value is an instance of class name.
a class name
whether the value is an object instance of class name.
Set property with name on value.
the property name
the JavaScriptCore.Value to set
Set property at index on value.
the property index
the JavaScriptCore.Value to set
Convert value to a boolean.
a gboolean result of the conversion.
Convert value to a double.
a gdouble result of the conversion.
Convert value to a gint32.
a gint32 result of the conversion.
Create a JSON string of value serialization. If indent is 0, the resulting JSON will
not contain newlines. The size of the indent is clamped to 10 spaces.
The number of spaces to indent when nesting.
a null-terminated JSON string with serialization of value
Convert value to a string. Use jsc_value_to_string_as_bytes() instead, if you need to
handle strings containing null characters.
a null-terminated string result of the conversion.
Convert value to a string and return the results as GLib.Bytes. This is needed
to handle strings with null characters.
a GLib.Bytes with the result of the conversion.
Obtain the %ArrayBuffer for the memory region of the typed array elements.
Obtains a pointer to the memory region that holds the elements of the typed
array; modifications done to them will be visible to JavaScript code. If
length is not null, the number of elements contained in the typed array
are also stored in the pointed location.
The returned pointer needs to be casted to the appropriate type (see
JavaScriptCore.TypedArrayType), and has the offset over the underlying array
buffer data applied—that is, points to the first element of the typed
array:
if (jsc_value_typed_array_get_type(value) != JSC_TYPED_ARRAY_UINT32)
g_error ("Only arrays of uint32_t are supported");
gsize count = 0;
uint32_t *elements = jsc_value_typed_array_get_contents (value, &count);
for (gsize i = 0; i < count; i++)
g_print ("index %zu, value %" PRIu32 "\n", i, elements[i]);
Note that the pointer returned by this function is not guaranteed to remain
the same after calls to other JSC API functions. See
jsc_value_array_buffer_get_data() for details.
pointer to memory.
Gets the number of elements in a typed array.
number of elements.
Gets the offset over the underlying array buffer data.
offset, in bytes.
Gets the size of a typed array.
size, in bytes.
Gets the type of elements contained in a typed array.
type of the elements, or JavaScriptCore.TypedArrayType.NONE if value is not a typed array.
Staticnew_Optionaldestroy_notify: DestroyNotifyStaticnew_Optionalarray: JavaScriptCore.Value[]Staticnew_Staticnew_Staticnew_Staticnew_Optionalparameter_types: GType<unknown>[]Staticnew_Staticnew_Staticnew_Staticnew_Optionalinstance: anyOptionaljsc_class: JavaScriptCore.ClassStaticnew_Staticnew_Optionalstring: stringStaticnew_Optionalbytes: GLib.BytesStaticnew_Staticnew_Creates a binding between source_property on source and target_property
on target.
Whenever the source_property is changed the target_property is
updated using the same value. For instance:
g_object_bind_property (action, "active", widget, "sensitive", 0);
Will result in the "sensitive" property of the widget GObject.Object instance to be updated with the same value of the "active" property of the action GObject.Object instance.
If flags contains GObject.BindingFlags.BIDIRECTIONAL then the binding will be mutual:
if target_property on target changes then the source_property on source
will be updated as well.
The binding will automatically be removed when either the source or the
target instances are finalized. To remove the binding without affecting the
source and the target you can just call g_object_unref() on the returned
GObject.Binding instance.
Removing the binding by calling g_object_unref() on it must only be done if
the binding, source and target are only used from a single thread and it
is clear that both source and target outlive the binding. Especially it
is not safe to rely on this if the binding, source or target can be
finalized from different threads. Keep another reference to the binding and
use g_binding_unbind() instead to be on the safe side.
A GObject.Object can have multiple bindings.
the property on source to bind
the target GObject.Object
the property on target to bind
flags to pass to GObject.Binding
the GObject.Binding instance representing the binding between the two GObject.Object instances. The binding is released whenever the GObject.Binding reference count reaches zero.
Complete version of g_object_bind_property().
Creates a binding between source_property on source and target_property
on target, allowing you to set the transformation functions to be used by
the binding.
If flags contains GObject.BindingFlags.BIDIRECTIONAL then the binding will be mutual:
if target_property on target changes then the source_property on source
will be updated as well. The transform_from function is only used in case
of bidirectional bindings, otherwise it will be ignored
The binding will automatically be removed when either the source or the
target instances are finalized. This will release the reference that is
being held on the GObject.Binding instance; if you want to hold on to the
GObject.Binding instance, you will need to hold a reference to it.
To remove the binding, call g_binding_unbind().
A GObject.Object can have multiple bindings.
The same user_data parameter will be used for both transform_to
and transform_from transformation functions; the notify function will
be called once, when the binding is removed. If you need different data
for each transformation function, please use
g_object_bind_property_with_closures() instead.
the property on source to bind
the target GObject.Object
the property on target to bind
flags to pass to GObject.Binding
Optionaltransform_to: BindingTransformFuncthe transformation function from the source to the target, or null to use the default
Optionaltransform_from: BindingTransformFuncthe transformation function from the target to the source, or null to use the default
Optionalnotify: DestroyNotifya function to call when disposing the binding, to free resources used by the transformation functions, or null if not required
the GObject.Binding instance representing the binding between the two GObject.Object instances. The binding is released whenever the GObject.Binding reference count reaches zero.
Creates a binding between source_property on source and target_property
on target, allowing you to set the transformation functions to be used by
the binding.
This function is the language bindings friendly version of
g_object_bind_property_full(), using GClosures instead of
function pointers.
the property on source to bind
the target GObject.Object
the property on target to bind
flags to pass to GObject.Binding
a GObject.Closure wrapping the transformation function from the source to the target, or null to use the default
a GObject.Closure wrapping the transformation function from the target to the source, or null to use the default
the GObject.Binding instance representing the binding between the two GObject.Object instances. The binding is released whenever the GObject.Binding reference count reaches zero.
Blocks a handler of an instance so it will not be called during any signal emissions
Handler ID of the handler to be blocked
Disconnects a handler from an instance so it will not be called during any future or currently ongoing emissions of the signal it has been connected to.
Handler ID of the handler to be disconnected
This function is intended for GObject.Object implementations to re-enforce
a [floating][floating-ref] object reference. Doing this is seldom
required: all GInitiallyUnowneds are created with a floating reference
which usually just needs to be sunken by calling g_object_ref_sink().
Increases the freeze count on object. If the freeze count is
non-zero, the emission of "notify" signals on object is
stopped. The signals are queued until the freeze count is decreased
to zero. Duplicate notifications are squashed so that at most one
GObject.Object::notify signal is emitted for each property modified while the
object is frozen.
This is necessary for accessors that modify multiple properties to prevent premature notification while the object is still being modified.
Gets a named field from the objects table of associations (see g_object_set_data()).
name of the key for that association
the data if found, or null if no such data exists.
Gets a property of an object.
The value can be:
In general, a copy is made of the property contents and the caller is responsible for freeing the memory by calling GObject.Value.unset.
Note that GObject.Object.get_property is really intended for language bindings, GObject.Object.get is much more convenient for C programming.
The name of the property to get
Return location for the property value. Can be an empty GObject.Value initialized by G_VALUE_INIT (auto-initialized with expected type since GLib 2.60), a GObject.Value initialized with the expected property type, or a GObject.Value initialized with a transformable type
This function gets back user data pointers stored via
g_object_set_qdata().
A GLib.Quark, naming the user data pointer
The user data pointer set, or null
Gets n_properties properties for an object.
Obtained properties will be set to values. All properties must be valid.
Warnings will be emitted and undefined behaviour may result if invalid
properties are passed in.
the names of each property to get
the values of each property to get
Checks whether object has a [floating][floating-ref] reference.
true if object has a floating reference
Emits a "notify" signal for the property property_name on object.
When possible, eg. when signaling a property change from within the class
that registered the property, you should use g_object_notify_by_pspec()
instead.
Note that emission of the notify signal may be blocked with
g_object_freeze_notify(). In this case, the signal emissions are queued
and will be emitted (in reverse order) when g_object_thaw_notify() is
called.
the name of a property installed on the class of object.
Emits a "notify" signal for the property specified by pspec on object.
This function omits the property name lookup, hence it is faster than
g_object_notify().
One way to avoid using g_object_notify() from within the
class that registered the properties, and using g_object_notify_by_pspec()
instead, is to store the GParamSpec used with
g_object_class_install_property() inside a static array, e.g.:
typedef enum
{
PROP_FOO = 1,
PROP_LAST
} MyObjectProperty;
static GParamSpec *properties[PROP_LAST];
static void
my_object_class_init (MyObjectClass *klass)
{
properties[PROP_FOO] = g_param_spec_int ("foo", NULL, NULL,
0, 100,
50,
G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS);
g_object_class_install_property (gobject_class,
PROP_FOO,
properties[PROP_FOO]);
}
and then notify a change on the "foo" property with:
g_object_notify_by_pspec (self, properties[PROP_FOO]);
the GObject.ParamSpec of a property installed on the class of object.
Increases the reference count of object.
Since GLib 2.56, if GLIB_VERSION_MAX_ALLOWED is 2.56 or greater, the type
of object will be propagated to the return type (using the GCC typeof()
extension), so any casting the caller needs to do on the return type must be
explicit.
the same object
Increase the reference count of object, and possibly remove the
[floating][floating-ref] reference, if object has a floating reference.
In other words, if the object is floating, then this call "assumes ownership" of the floating reference, converting it to a normal reference by clearing the floating flag while leaving the reference count unchanged. If the object is not floating, then this call adds a new normal reference increasing the reference count by one.
Since GLib 2.56, the type of object will be propagated to the return type
under the same conditions as for g_object_ref().
object
Releases all references to other objects. This can be used to break reference cycles.
This function should only be called from object system implementations.
Sets multiple properties of an object at once. The properties argument should be a dictionary mapping property names to values.
Object containing the properties to set
Each object carries around a table of associations from strings to pointers. This function lets you set an association.
If the object already had an association with that name, the old association will be destroyed.
Internally, the key is converted to a GLib.Quark using g_quark_from_string().
This means a copy of key is kept permanently (even after object has been
finalized) — so it is recommended to only use a small, bounded set of values
for key in your program, to avoid the GLib.Quark storage growing unbounded.
name of the key
Optionaldata: anydata to associate with that key
Sets a property on an object.
The name of the property to set
The value to set the property to
Remove a specified datum from the object's data associations, without invoking the association's destroy handler.
name of the key
the data if found, or null if no such data exists.
This function gets back user data pointers stored via
g_object_set_qdata() and removes the data from object
without invoking its destroy() function (if any was
set).
Usually, calling this function is only required to update
user data pointers with a destroy notifier, for example:
void
object_add_to_user_list (GObject *object,
const gchar *new_string)
{
// the quark, naming the object data
GQuark quark_string_list = g_quark_from_static_string ("my-string-list");
// retrieve the old string list
GList *list = g_object_steal_qdata (object, quark_string_list);
// prepend new string
list = g_list_prepend (list, g_strdup (new_string));
// this changed 'list', so we need to set it again
g_object_set_qdata_full (object, quark_string_list, list, free_string_list);
}
static void
free_string_list (gpointer data)
{
GList *node, *list = data;
for (node = list; node; node = node->next)
g_free (node->data);
g_list_free (list);
}
Using g_object_get_qdata() in the above example, instead of
g_object_steal_qdata() would have left the destroy function set,
and thus the partial string list would have been freed upon
g_object_set_qdata_full().
A GLib.Quark, naming the user data pointer
The user data pointer set, or null
Stops a signal's emission by the given signal name. This will prevent the default handler and any subsequent signal handlers from being invoked.
Name of the signal to stop emission of
Reverts the effect of a previous call to
g_object_freeze_notify(). The freeze count is decreased on object
and when it reaches zero, queued "notify" signals are emitted.
Duplicate notifications for each property are squashed so that at most one GObject.Object::notify signal is emitted for each property, in the reverse order in which they have been queued.
It is an error to call this function when the freeze count is zero.
Unblocks a handler so it will be called again during any signal emissions
Handler ID of the handler to be unblocked
Decreases the reference count of object. When its reference count
drops to 0, the object is finalized (i.e. its memory is freed).
If the pointer to the GObject.Object may be reused in future (for example, if it is
an instance variable of another object), it is recommended to clear the
pointer to null rather than retain a dangling pointer to a potentially
invalid GObject.Object instance. Use g_clear_object() for this.
Virtualvfunc_the constructed function is called by g_object_new() as the
final step of the object creation process. At the point of the call, all
construction properties have been set on the object. The purpose of this
call is to allow for object initialisation steps that can only be performed
after construction properties have been set. constructed implementors
should chain up to the constructed call of their parent class to allow it
to complete its initialisation.
Virtualvfunc_Virtualvfunc_the dispose function is supposed to drop all references to other
objects, but keep the instance otherwise intact, so that client method
invocations still work. It may be run multiple times (due to reference
loops). Before returning, dispose should chain up to the dispose method
of the parent class.
Virtualvfunc_instance finalization function, should finish the finalization of
the instance begun in dispose and chain up to the finalize method of the
parent class.
Virtualvfunc_Virtualvfunc_Emits a "notify" signal for the property property_name on object.
When possible, eg. when signaling a property change from within the class
that registered the property, you should use g_object_notify_by_pspec()
instead.
Note that emission of the notify signal may be blocked with
g_object_freeze_notify(). In this case, the signal emissions are queued
and will be emitted (in reverse order) when g_object_thaw_notify() is
called.
Virtualvfunc_the generic setter for all properties of this type. Should be
overridden for every type with properties. If implementations of
set_property don't emit property change notification explicitly, this will
be done implicitly by the type system. However, if the notify signal is
emitted explicitly, the type system will not emit it a second time.
This function essentially limits the life time of the closure to
the life time of the object. That is, when the object is finalized,
the closure is invalidated by calling g_closure_invalidate() on
it, in order to prevent invocations of the closure with a finalized
(nonexisting) object. Also, g_object_ref() and g_object_unref() are
added as marshal guards to the closure, to ensure that an extra
reference count is held on object during invocation of the
closure. Usually, this function will be called on closures that
use this object as closure data.
GObject.Closure to watch
Static_Staticcompat_Optionaldata: anyStaticfind_Staticinstall_Staticinstall_the id for the new property
the GObject.ParamSpec for the new property
Staticinterface_Find the GObject.ParamSpec with the given name for an
interface. Generally, the interface vtable passed in as g_iface
will be the default vtable from g_type_default_interface_ref(), or,
if you know the interface has already been loaded,
g_type_default_interface_peek().
any interface vtable for the interface, or the default vtable for the interface
name of a property to look up.
Staticinterface_Add a property to an interface; this is only useful for interfaces
that are added to GObject-derived types. Adding a property to an
interface forces all objects classes with that interface to have a
compatible property. The compatible property could be a newly
created GObject.ParamSpec, but normally
g_object_class_override_property() will be used so that the object
class only needs to provide an implementation and inherits the
property description, default value, bounds, and so forth from the
interface property.
This function is meant to be called from the interface's default
vtable initialization function (the class_init member of
GObject.TypeInfo.) It must not be called after after class_init has
been called for any object types implementing this interface.
If pspec is a floating reference, it will be consumed.
any interface vtable for the interface, or the default vtable for the interface.
the GObject.ParamSpec for the new property
Staticinterface_Lists the properties of an interface.Generally, the interface
vtable passed in as g_iface will be the default vtable from
g_type_default_interface_ref(), or, if you know the interface has
already been loaded, g_type_default_interface_peek().
any interface vtable for the interface, or the default vtable for the interface
Staticlist_StaticnewvStaticoverride_the new property ID
the name of a property registered in a parent class or in an interface of this class.
JSCValue represents a reference to a value in a JavaScriptCore.Context. The JSCValue protects the referenced value from being garbage collected.