#include "gaction.h"
#include "glibintl.h"
-G_DEFINE_TYPE (GAction, g_action, G_TYPE_OBJECT)
+G_DEFINE_INTERFACE (GAction, g_action, G_TYPE_OBJECT)
/**
* SECTION:gaction
* @title: GAction
- * @short_description: an action
+ * @short_description: An action
*
* #GAction represents a single named action.
*
* The state may have a hint associated with it, specifying its valid
* range.
*
- * #GAction is intended to be used both as a simple action class and as
- * a base class for more complicated action types. The base class
- * itself supports activation and state. Not supported are state hints
- * and filtering requests to set the state based on the requested value.
- * You should subclass if you require either of these abilities.
+ * #GAction is merely the interface to the concept of an action, as
+ * described above. Various implementations of actions exist, including
+ * #GSimpleAction and #GtkAction.
*
- * In all cases, the base class is responsible for storing the name of
- * the action, the parameter type, the enabled state, the optional state
- * type and the state and emitting the appropriate signals when these
- * change. The base class is also responsbile for filtering calls to
- * g_action_activate() and g_action_set_state() for type safety and for
- * the state being enabled.
+ * In all cases, the implementing class is responsible for storing the
+ * name of the action, the parameter type, the enabled state, the
+ * optional state type and the state and emitting the appropriate
+ * signals when these change. The implementor responsible for filtering
+ * calls to g_action_activate() and g_action_set_state() for type safety
+ * and for the state being enabled.
*
* Probably the only useful thing to do with a #GAction is to put it
* inside of a #GSimpleActionGroup.
**/
-struct _GActionPrivate
-{
- gchar *name;
- GVariantType *parameter_type;
- guint enabled : 1;
- guint state_set : 1;
- GVariant *state;
-};
-
-enum
-{
- PROP_NONE,
- PROP_NAME,
- PROP_PARAMETER_TYPE,
- PROP_ENABLED,
- PROP_STATE_TYPE,
- PROP_STATE
-};
-
-enum
-{
- SIGNAL_ACTIVATE,
- NR_SIGNALS
-};
-
-static guint g_action_signals[NR_SIGNALS];
-
-static void
-g_action_real_set_state (GAction *action,
- GVariant *value)
-{
- if (action->priv->state == value)
- return;
-
- if (!action->priv->state || !g_variant_equal (action->priv->state, value))
- {
- if (action->priv->state)
- g_variant_unref (action->priv->state);
-
- action->priv->state = g_variant_ref (value);
-
- g_object_notify (G_OBJECT (action), "state");
- }
-}
-
-static GVariant *
-g_action_real_get_state_hint (GAction *action)
-{
- return NULL;
-}
-
-static void
-g_action_set_property (GObject *object,
- guint prop_id,
- const GValue *value,
- GParamSpec *pspec)
-{
- GAction *action = G_ACTION (object);
-
- switch (prop_id)
- {
- case PROP_NAME:
- g_assert (action->priv->name == NULL);
- action->priv->name = g_value_dup_string (value);
- break;
-
- case PROP_PARAMETER_TYPE:
- g_assert (action->priv->parameter_type == NULL);
- action->priv->parameter_type = g_value_dup_boxed (value);
- break;
-
- case PROP_ENABLED:
- g_action_set_enabled (action, g_value_get_boolean (value));
- break;
-
- case PROP_STATE:
- /* PROP_STATE is marked as G_PARAM_CONSTRUCT so we always get a
- * call during object construction, even if it is NULL. We treat
- * that first call differently, for a number of reasons.
- *
- * First, we don't want the value to be rejected by the
- * possibly-overridden .set_state() function. Second, we don't
- * want to be tripped by the assertions in g_action_set_state()
- * that would enforce the catch22 that we only provide a value of
- * the same type as the existing value (when there is not yet an
- * existing value).
- */
- if (action->priv->state_set)
- g_action_set_state (action, g_value_get_variant (value));
-
- else /* this is the special case */
- {
- /* only do it the first time. */
- action->priv->state_set = TRUE;
-
- /* blindly set it. */
- action->priv->state = g_value_dup_variant (value);
- }
- break;
-
- default:
- g_assert_not_reached ();
- }
-}
-
-static void
-g_action_get_property (GObject *object,
- guint prop_id,
- GValue *value,
- GParamSpec *pspec)
-{
- GAction *action = G_ACTION (object);
-
- switch (prop_id)
- {
- case PROP_NAME:
- g_value_set_string (value, g_action_get_name (action));
- break;
-
- case PROP_PARAMETER_TYPE:
- g_value_set_boxed (value, g_action_get_parameter_type (action));
- break;
-
- case PROP_ENABLED:
- g_value_set_boolean (value, g_action_get_enabled (action));
- break;
-
- case PROP_STATE_TYPE:
- g_value_set_boxed (value, g_action_get_state_type (action));
- break;
-
- case PROP_STATE:
- g_value_set_variant (value, g_action_get_state (action));
- break;
-
- default:
- g_assert_not_reached ();
- }
-}
-
-static void
-g_action_finalize (GObject *object)
-{
- GAction *action = G_ACTION (object);
-
- g_free (action->priv->name);
- if (action->priv->parameter_type)
- g_variant_type_free (action->priv->parameter_type);
- if (action->priv->state)
- g_variant_unref (action->priv->state);
-
- G_OBJECT_CLASS (g_action_parent_class)
- ->finalize (object);
-}
-
void
-g_action_init (GAction *action)
+g_action_default_init (GActionInterface *iface)
{
- action->priv = G_TYPE_INSTANCE_GET_PRIVATE (action,
- G_TYPE_ACTION,
- GActionPrivate);
-}
-
-void
-g_action_class_init (GActionClass *class)
-{
- GObjectClass *object_class = G_OBJECT_CLASS (class);
-
- class->get_state_hint = g_action_real_get_state_hint;
- class->set_state = g_action_real_set_state;
-
- object_class->get_property = g_action_get_property;
- object_class->set_property = g_action_set_property;
- object_class->finalize = g_action_finalize;
-
- /**
- * GAction::activate:
- * @action: the #GAction
- * @parameter: (allow-none): the parameter to the activation
- *
- * Indicates that the action was just activated.
- *
- * @parameter will always be of the expected type. In the event that
- * an incorrect type was given, no signal will be emitted.
- *
- * Since: 2.26
- */
- g_action_signals[SIGNAL_ACTIVATE] =
- g_signal_new (I_("activate"),
- G_TYPE_ACTION,
- G_SIGNAL_RUN_LAST,
- G_STRUCT_OFFSET (GActionClass, activate),
- NULL, NULL,
- g_cclosure_marshal_VOID__VARIANT,
- G_TYPE_NONE, 1,
- G_TYPE_VARIANT);
-
/**
* GAction:name:
*
* The name of the action. This is mostly meaningful for identifying
* the action once it has been added to a #GActionGroup.
*
- * Since: 2.26
+ * Since: 2.28
**/
- g_object_class_install_property (object_class, PROP_NAME,
- g_param_spec_string ("name",
- P_("Action Name"),
- P_("The name used to invoke the action"),
- NULL,
- G_PARAM_READWRITE |
- G_PARAM_CONSTRUCT_ONLY |
- G_PARAM_STATIC_STRINGS));
+ g_object_interface_install_property (iface,
+ g_param_spec_string ("name",
+ P_("Action Name"),
+ P_("The name used to invoke the action"),
+ NULL,
+ G_PARAM_READABLE |
+ G_PARAM_STATIC_STRINGS));
/**
* GAction:parameter-type:
* The type of the parameter that must be given when activating the
* action.
*
- * Since: 2.26
+ * Since: 2.28
**/
- g_object_class_install_property (object_class, PROP_PARAMETER_TYPE,
- g_param_spec_boxed ("parameter-type",
- P_("Parameter Type"),
- P_("The type of GVariant passed to activate()"),
- G_TYPE_VARIANT_TYPE,
- G_PARAM_READWRITE |
- G_PARAM_CONSTRUCT_ONLY |
- G_PARAM_STATIC_STRINGS));
+ g_object_interface_install_property (iface,
+ g_param_spec_boxed ("parameter-type",
+ P_("Parameter Type"),
+ P_("The type of GVariant passed to activate()"),
+ G_TYPE_VARIANT_TYPE,
+ G_PARAM_READABLE |
+ G_PARAM_STATIC_STRINGS));
/**
* GAction:enabled:
* If the action is disabled then calls to g_action_activate() and
* g_action_set_state() have no effect.
*
- * Since: 2.26
+ * Since: 2.28
**/
- g_object_class_install_property (object_class, PROP_ENABLED,
- g_param_spec_boolean ("enabled",
- P_("Enabled"),
- P_("If the action can be activated"),
- TRUE,
- G_PARAM_CONSTRUCT |
- G_PARAM_READWRITE |
- G_PARAM_STATIC_STRINGS));
+ g_object_interface_install_property (iface,
+ g_param_spec_boolean ("enabled",
+ P_("Enabled"),
+ P_("If the action can be activated"),
+ TRUE,
+ G_PARAM_READABLE |
+ G_PARAM_STATIC_STRINGS));
/**
* GAction:state-type:
* The #GVariantType of the state that the action has, or %NULL if the
* action is stateless.
*
- * Since: 2.26
+ * Since: 2.28
**/
- g_object_class_install_property (object_class, PROP_STATE_TYPE,
- g_param_spec_boxed ("state-type",
- P_("State Type"),
- P_("The type of the state kept by the action"),
- G_TYPE_VARIANT_TYPE,
- G_PARAM_READABLE |
- G_PARAM_STATIC_STRINGS));
+ g_object_interface_install_property (iface,
+ g_param_spec_boxed ("state-type",
+ P_("State Type"),
+ P_("The type of the state kept by the action"),
+ G_TYPE_VARIANT_TYPE,
+ G_PARAM_READABLE |
+ G_PARAM_STATIC_STRINGS));
/**
* GAction:state:
*
* The state of the action, or %NULL if the action is stateless.
*
- * Since: 2.26
+ * Since: 2.28
**/
- g_object_class_install_property (object_class, PROP_STATE,
- g_param_spec_variant ("state",
- P_("State"),
- P_("The state the action is in"),
- G_VARIANT_TYPE_ANY,
- NULL,
- G_PARAM_CONSTRUCT |
- G_PARAM_READWRITE |
- G_PARAM_STATIC_STRINGS));
-
- g_type_class_add_private (class, sizeof (GActionPrivate));
+ g_object_interface_install_property (iface,
+ g_param_spec_variant ("state",
+ P_("State"),
+ P_("The state the action is in"),
+ G_VARIANT_TYPE_ANY,
+ NULL,
+ G_PARAM_CONSTRUCT |
+ G_PARAM_READWRITE |
+ G_PARAM_STATIC_STRINGS));
}
/**
* its state or may change its state to something other than @value.
* See g_action_get_state_hint().
*
- * Since: 2.26
+ * If the @value GVariant is floating, it is consumed.
+ *
+ * Since: 2.28
**/
void
g_action_set_state (GAction *action,
g_variant_ref_sink (value);
- if (action->priv->enabled)
- G_ACTION_GET_CLASS (action)
- ->set_state (action, value);
+ G_ACTION_GET_IFACE (action)
+ ->set_state (action, value);
g_variant_unref (value);
}
* action is stateful then the type of the return value is the type
* given by g_action_get_state_type().
*
- * Returns: (allow-none) (transfer none): the current state of the action
+ * The return value (if non-%NULL) should be freed with
+ * g_variant_unref() when it is no longer required.
+ *
+ * Returns: (transfer full): the current state of the action
*
- * Since: 2.26
+ * Since: 2.28
**/
GVariant *
g_action_get_state (GAction *action)
{
g_return_val_if_fail (G_IS_ACTION (action), NULL);
- return action->priv->state;
+ return G_ACTION_GET_IFACE (action)
+ ->get_state (action);
}
/**
*
* Returns: the name of the action
*
- * Since: 2.26
+ * Since: 2.28
**/
const gchar *
g_action_get_name (GAction *action)
{
g_return_val_if_fail (G_IS_ACTION (action), NULL);
- return action->priv->name;
+ return G_ACTION_GET_IFACE (action)
+ ->get_name (action);
}
/**
*
* Returns: (allow-none): the parameter type
*
- * Since: 2.26
+ * Since: 2.28
**/
const GVariantType *
g_action_get_parameter_type (GAction *action)
{
g_return_val_if_fail (G_IS_ACTION (action), NULL);
- return action->priv->parameter_type;
+ return G_ACTION_GET_IFACE (action)
+ ->get_parameter_type (action);
}
/**
*
* Returns: (allow-none): the state type, if the action is stateful
*
- * Since: 2.26
+ * Since: 2.28
**/
const GVariantType *
g_action_get_state_type (GAction *action)
{
g_return_val_if_fail (G_IS_ACTION (action), NULL);
- if (action->priv->state != NULL)
- return g_variant_get_type (action->priv->state);
- else
- return NULL;
+ return G_ACTION_GET_IFACE (action)
+ ->get_state_type (action);
}
/**
* The return value (if non-%NULL) should be freed with
* g_variant_unref() when it is no longer required.
*
- * Returns: (allow-none): the state range hint
+ * Returns: (transfer full): the state range hint
*
- * Since: 2.26
+ * Since: 2.28
**/
GVariant *
g_action_get_state_hint (GAction *action)
{
g_return_val_if_fail (G_IS_ACTION (action), NULL);
- return G_ACTION_GET_CLASS (action)->get_state_hint (action);
+ return G_ACTION_GET_IFACE (action)
+ ->get_state_hint (action);
}
/**
*
* Returns: whether the action is enabled
*
- * Since: 2.26
+ * Since: 2.28
**/
gboolean
g_action_get_enabled (GAction *action)
{
g_return_val_if_fail (G_IS_ACTION (action), FALSE);
- return action->priv->enabled;
-}
-
-/**
- * g_action_set_enabled:
- * @action: a #GAction
- * @enabled: whether the action is enabled
- *
- * Sets the action as enabled or not.
- *
- * An action must be enabled in order to be activated or in order to
- * have its state changed from outside callers.
- *
- * Since: 2.26
- **/
-void
-g_action_set_enabled (GAction *action,
- gboolean enabled)
-{
- g_return_if_fail (G_IS_ACTION (action));
-
- enabled = !!enabled;
-
- if (action->priv->enabled != enabled)
- {
- action->priv->enabled = enabled;
- g_object_notify (G_OBJECT (action), "enabled");
- }
+ return G_ACTION_GET_IFACE (action)
+ ->get_enabled (action);
}
/**
* the parameter type given at construction time). If the parameter
* type was %NULL then @parameter must also be %NULL.
*
- * Since: 2.26
+ * Since: 2.28
**/
void
g_action_activate (GAction *action,
{
g_return_if_fail (G_IS_ACTION (action));
- g_return_if_fail (action->priv->parameter_type == NULL ?
- parameter == NULL :
- (parameter != NULL &&
- g_variant_is_of_type (parameter,
- action->priv->parameter_type)));
-
if (parameter != NULL)
g_variant_ref_sink (parameter);
- if (action->priv->enabled)
- g_signal_emit (action, g_action_signals[SIGNAL_ACTIVATE], 0, parameter);
+ G_ACTION_GET_IFACE (action)
+ ->activate (action, parameter);
if (parameter != NULL)
g_variant_unref (parameter);
}
-
-/**
- * g_action_new:
- * @name: the name of the action
- * @parameter_type: (allow-none): the type of parameter to the activate function
- *
- * Creates a new action.
- *
- * The created action is stateless. See g_action_new_stateful().
- *
- * Returns: a new #GAction
- *
- * Since: 2.26
- **/
-GAction *
-g_action_new (const gchar *name,
- const GVariantType *parameter_type)
-{
- return g_object_new (G_TYPE_ACTION,
- "name", name,
- "parameter-type", parameter_type,
- NULL);
-}
-
-/**
- * g_action_new_stateful:
- * @name: the name of the action
- * @parameter_type: (allow-none): the type of the parameter to the activate function
- * @state: the initial state of the action
- *
- * Creates a new stateful action.
- *
- * @state is the initial state of the action. All future state values
- * must have the same #GVariantType as the initial state.
- *
- * Returns: a new #GAction
- *
- * Since: 2.26
- **/
-GAction *
-g_action_new_stateful (const gchar *name,
- const GVariantType *parameter_type,
- GVariant *state)
-{
- return g_object_new (G_TYPE_ACTION,
- "name", name,
- "parameter-type", parameter_type,
- "state", state,
- NULL);
-}
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