glib/gio/gaction.c

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/*
* Copyright © 2010 Codethink Limited
*
* This program is free software: you can redistribute it and/or modify
* it under the terms of the GNU Lesser General Public License as published
* by the Free Software Foundation; either version 2 of the licence or (at
* your option) any later version.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General
* Public License along with this library; if not, write to the
* Free Software Foundation, Inc., 59 Temple Place, Suite 330,
* Boston, MA 02111-1307, USA.
*
* Authors: Ryan Lortie <desrt@desrt.ca>
*/
#include "config.h"
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#include "gaction.h"
#include "glibintl.h"
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#include <string.h>
G_DEFINE_INTERFACE (GAction, g_action, G_TYPE_OBJECT)
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/**
* SECTION:gaction
* @title: GAction
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* @short_description: An action interface
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*
* #GAction represents a single named action.
*
* The main interface to an action is that it can be activated with
* g_action_activate(). This results in the 'activate' signal being
* emitted. An activation has a #GVariant parameter (which may be
* %NULL). The correct type for the parameter is determined by a static
* parameter type (which is given at construction time).
*
* An action may optionally have a state, in which case the state may be
Make 4 incompatible changes to the GAction API This commit represents an API break to GAction in the following ways: - the 'set_state' entry in the GActionInterface vtable has been renamed to 'change_state'. The number and order of vtable items has not otherwise changed. - g_action_set_state() has been renamed to g_action_change_state() to match the updated vtable entry. - the "state" property of the GAction interface has been changed to read-only to reflect the fact that g_action_set_state() no longer exists. - GSimpleActionClass has been hidden. GSimpleAction can no longer be subclassed. >> Rationale g_action_set_state() has never been a true setter in the sense that calling it will update the value of the "state" property. It has always been closer to "request 'state' to be changed to this value" with semantics defined by the implementor of the interface. This is why the equivalent method in GActionGroup had its name changed from 'set' to 'change'. This change makes the two interfaces more consistent and removes any implication about the effect that calling set_state() should have on the 'state' property. >> Impact This incompatible API break was undertaken only because I strongly suspect that it will go entirely unnoticed. If the break actually affects anybody, then we will accommodate them (possibly going as far as to revert this commit entirely). The virtual table change only impacts implementors of GAction. I strongly suspect that this is nobody (except for GSimpleAction). The hiding of GSimpleActionClass only impacts impacts subclasses of GSimpleAction. I strongly suspect that none of these exist. The changing of the property to be read-only only affects people who were trying to change the state by using GObject properties. I strongly suspect that this is nobody at all. The removal of the g_action_set_state() call is the most dangerous, but I still suspect that it will impact nobody outside of GLib. If anybody is impacted by this change then, at their request, I will reintroduce the API as a deprecated alias for g_action_change_state().
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* set with g_action_change_state(). This call takes a #GVariant. The
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* correct type for the state is determined by a static state type
* (which is given at construction time).
*
* The state may have a hint associated with it, specifying its valid
* range.
*
* #GAction is merely the interface to the concept of an action, as
* described above. Various implementations of actions exist, including
* #GSimpleAction and #GtkAction.
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*
* 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
Make 4 incompatible changes to the GAction API This commit represents an API break to GAction in the following ways: - the 'set_state' entry in the GActionInterface vtable has been renamed to 'change_state'. The number and order of vtable items has not otherwise changed. - g_action_set_state() has been renamed to g_action_change_state() to match the updated vtable entry. - the "state" property of the GAction interface has been changed to read-only to reflect the fact that g_action_set_state() no longer exists. - GSimpleActionClass has been hidden. GSimpleAction can no longer be subclassed. >> Rationale g_action_set_state() has never been a true setter in the sense that calling it will update the value of the "state" property. It has always been closer to "request 'state' to be changed to this value" with semantics defined by the implementor of the interface. This is why the equivalent method in GActionGroup had its name changed from 'set' to 'change'. This change makes the two interfaces more consistent and removes any implication about the effect that calling set_state() should have on the 'state' property. >> Impact This incompatible API break was undertaken only because I strongly suspect that it will go entirely unnoticed. If the break actually affects anybody, then we will accommodate them (possibly going as far as to revert this commit entirely). The virtual table change only impacts implementors of GAction. I strongly suspect that this is nobody (except for GSimpleAction). The hiding of GSimpleActionClass only impacts impacts subclasses of GSimpleAction. I strongly suspect that none of these exist. The changing of the property to be read-only only affects people who were trying to change the state by using GObject properties. I strongly suspect that this is nobody at all. The removal of the g_action_set_state() call is the most dangerous, but I still suspect that it will impact nobody outside of GLib. If anybody is impacted by this change then, at their request, I will reintroduce the API as a deprecated alias for g_action_change_state().
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* calls to g_action_activate() and g_action_change_state() for type
* safety and for the state being enabled.
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*
* Probably the only useful thing to do with a #GAction is to put it
* inside of a #GSimpleActionGroup.
**/
/**
* GActionInterface:
* @get_name: the virtual function pointer for g_action_get_name()
* @get_parameter_type: the virtual function pointer for g_action_get_parameter_type()
* @get_state_type: the virtual function pointer for g_action_get_state_type()
* @get_state_hint: the virtual function pointer for g_action_get_state_hint()
* @get_enabled: the virtual function pointer for g_action_get_enabled()
* @get_state: the virtual function pointer for g_action_get_state()
* @change_state: the virtual function pointer for g_action_change_state()
* @activate: the virtual function pointer for g_action_activate(). Note that #GAction does not have an
* 'activate' signal but that implementations of it may have one.
*
* The virtual function table for #GAction.
*
* Since: 2.28
*/
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void
g_action_default_init (GActionInterface *iface)
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{
/**
* GAction:name:
*
* The name of the action. This is mostly meaningful for identifying
* the action once it has been added to a #GActionGroup.
*
* Since: 2.28
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**/
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));
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/**
* GAction:parameter-type:
*
* The type of the parameter that must be given when activating the
* action.
*
* Since: 2.28
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**/
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));
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/**
* GAction:enabled:
*
* If @action is currently enabled.
*
* If the action is disabled then calls to g_action_activate() and
Make 4 incompatible changes to the GAction API This commit represents an API break to GAction in the following ways: - the 'set_state' entry in the GActionInterface vtable has been renamed to 'change_state'. The number and order of vtable items has not otherwise changed. - g_action_set_state() has been renamed to g_action_change_state() to match the updated vtable entry. - the "state" property of the GAction interface has been changed to read-only to reflect the fact that g_action_set_state() no longer exists. - GSimpleActionClass has been hidden. GSimpleAction can no longer be subclassed. >> Rationale g_action_set_state() has never been a true setter in the sense that calling it will update the value of the "state" property. It has always been closer to "request 'state' to be changed to this value" with semantics defined by the implementor of the interface. This is why the equivalent method in GActionGroup had its name changed from 'set' to 'change'. This change makes the two interfaces more consistent and removes any implication about the effect that calling set_state() should have on the 'state' property. >> Impact This incompatible API break was undertaken only because I strongly suspect that it will go entirely unnoticed. If the break actually affects anybody, then we will accommodate them (possibly going as far as to revert this commit entirely). The virtual table change only impacts implementors of GAction. I strongly suspect that this is nobody (except for GSimpleAction). The hiding of GSimpleActionClass only impacts impacts subclasses of GSimpleAction. I strongly suspect that none of these exist. The changing of the property to be read-only only affects people who were trying to change the state by using GObject properties. I strongly suspect that this is nobody at all. The removal of the g_action_set_state() call is the most dangerous, but I still suspect that it will impact nobody outside of GLib. If anybody is impacted by this change then, at their request, I will reintroduce the API as a deprecated alias for g_action_change_state().
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* g_action_change_state() have no effect.
*
* Since: 2.28
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**/
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));
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/**
* GAction:state-type:
*
* The #GVariantType of the state that the action has, or %NULL if the
* action is stateless.
*
* Since: 2.28
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**/
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));
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/**
* GAction:state:
*
* The state of the action, or %NULL if the action is stateless.
*
* Since: 2.28
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**/
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_READABLE |
G_PARAM_STATIC_STRINGS));
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}
/**
Make 4 incompatible changes to the GAction API This commit represents an API break to GAction in the following ways: - the 'set_state' entry in the GActionInterface vtable has been renamed to 'change_state'. The number and order of vtable items has not otherwise changed. - g_action_set_state() has been renamed to g_action_change_state() to match the updated vtable entry. - the "state" property of the GAction interface has been changed to read-only to reflect the fact that g_action_set_state() no longer exists. - GSimpleActionClass has been hidden. GSimpleAction can no longer be subclassed. >> Rationale g_action_set_state() has never been a true setter in the sense that calling it will update the value of the "state" property. It has always been closer to "request 'state' to be changed to this value" with semantics defined by the implementor of the interface. This is why the equivalent method in GActionGroup had its name changed from 'set' to 'change'. This change makes the two interfaces more consistent and removes any implication about the effect that calling set_state() should have on the 'state' property. >> Impact This incompatible API break was undertaken only because I strongly suspect that it will go entirely unnoticed. If the break actually affects anybody, then we will accommodate them (possibly going as far as to revert this commit entirely). The virtual table change only impacts implementors of GAction. I strongly suspect that this is nobody (except for GSimpleAction). The hiding of GSimpleActionClass only impacts impacts subclasses of GSimpleAction. I strongly suspect that none of these exist. The changing of the property to be read-only only affects people who were trying to change the state by using GObject properties. I strongly suspect that this is nobody at all. The removal of the g_action_set_state() call is the most dangerous, but I still suspect that it will impact nobody outside of GLib. If anybody is impacted by this change then, at their request, I will reintroduce the API as a deprecated alias for g_action_change_state().
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* g_action_change_state:
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* @action: a #GAction
* @value: the new state
*
* Request for the state of @action to be changed to @value.
*
* The action must be stateful and @value must be of the correct type.
* See g_action_get_state_type().
*
* This call merely requests a change. The action may refuse to change
* its state or may change its state to something other than @value.
* See g_action_get_state_hint().
*
* If the @value GVariant is floating, it is consumed.
*
Make 4 incompatible changes to the GAction API This commit represents an API break to GAction in the following ways: - the 'set_state' entry in the GActionInterface vtable has been renamed to 'change_state'. The number and order of vtable items has not otherwise changed. - g_action_set_state() has been renamed to g_action_change_state() to match the updated vtable entry. - the "state" property of the GAction interface has been changed to read-only to reflect the fact that g_action_set_state() no longer exists. - GSimpleActionClass has been hidden. GSimpleAction can no longer be subclassed. >> Rationale g_action_set_state() has never been a true setter in the sense that calling it will update the value of the "state" property. It has always been closer to "request 'state' to be changed to this value" with semantics defined by the implementor of the interface. This is why the equivalent method in GActionGroup had its name changed from 'set' to 'change'. This change makes the two interfaces more consistent and removes any implication about the effect that calling set_state() should have on the 'state' property. >> Impact This incompatible API break was undertaken only because I strongly suspect that it will go entirely unnoticed. If the break actually affects anybody, then we will accommodate them (possibly going as far as to revert this commit entirely). The virtual table change only impacts implementors of GAction. I strongly suspect that this is nobody (except for GSimpleAction). The hiding of GSimpleActionClass only impacts impacts subclasses of GSimpleAction. I strongly suspect that none of these exist. The changing of the property to be read-only only affects people who were trying to change the state by using GObject properties. I strongly suspect that this is nobody at all. The removal of the g_action_set_state() call is the most dangerous, but I still suspect that it will impact nobody outside of GLib. If anybody is impacted by this change then, at their request, I will reintroduce the API as a deprecated alias for g_action_change_state().
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* Since: 2.30
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**/
void
Make 4 incompatible changes to the GAction API This commit represents an API break to GAction in the following ways: - the 'set_state' entry in the GActionInterface vtable has been renamed to 'change_state'. The number and order of vtable items has not otherwise changed. - g_action_set_state() has been renamed to g_action_change_state() to match the updated vtable entry. - the "state" property of the GAction interface has been changed to read-only to reflect the fact that g_action_set_state() no longer exists. - GSimpleActionClass has been hidden. GSimpleAction can no longer be subclassed. >> Rationale g_action_set_state() has never been a true setter in the sense that calling it will update the value of the "state" property. It has always been closer to "request 'state' to be changed to this value" with semantics defined by the implementor of the interface. This is why the equivalent method in GActionGroup had its name changed from 'set' to 'change'. This change makes the two interfaces more consistent and removes any implication about the effect that calling set_state() should have on the 'state' property. >> Impact This incompatible API break was undertaken only because I strongly suspect that it will go entirely unnoticed. If the break actually affects anybody, then we will accommodate them (possibly going as far as to revert this commit entirely). The virtual table change only impacts implementors of GAction. I strongly suspect that this is nobody (except for GSimpleAction). The hiding of GSimpleActionClass only impacts impacts subclasses of GSimpleAction. I strongly suspect that none of these exist. The changing of the property to be read-only only affects people who were trying to change the state by using GObject properties. I strongly suspect that this is nobody at all. The removal of the g_action_set_state() call is the most dangerous, but I still suspect that it will impact nobody outside of GLib. If anybody is impacted by this change then, at their request, I will reintroduce the API as a deprecated alias for g_action_change_state().
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g_action_change_state (GAction *action,
GVariant *value)
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{
const GVariantType *state_type;
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g_return_if_fail (G_IS_ACTION (action));
g_return_if_fail (value != NULL);
state_type = g_action_get_state_type (action);
g_return_if_fail (state_type != NULL);
g_return_if_fail (g_variant_is_of_type (value, state_type));
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g_variant_ref_sink (value);
G_ACTION_GET_IFACE (action)
Make 4 incompatible changes to the GAction API This commit represents an API break to GAction in the following ways: - the 'set_state' entry in the GActionInterface vtable has been renamed to 'change_state'. The number and order of vtable items has not otherwise changed. - g_action_set_state() has been renamed to g_action_change_state() to match the updated vtable entry. - the "state" property of the GAction interface has been changed to read-only to reflect the fact that g_action_set_state() no longer exists. - GSimpleActionClass has been hidden. GSimpleAction can no longer be subclassed. >> Rationale g_action_set_state() has never been a true setter in the sense that calling it will update the value of the "state" property. It has always been closer to "request 'state' to be changed to this value" with semantics defined by the implementor of the interface. This is why the equivalent method in GActionGroup had its name changed from 'set' to 'change'. This change makes the two interfaces more consistent and removes any implication about the effect that calling set_state() should have on the 'state' property. >> Impact This incompatible API break was undertaken only because I strongly suspect that it will go entirely unnoticed. If the break actually affects anybody, then we will accommodate them (possibly going as far as to revert this commit entirely). The virtual table change only impacts implementors of GAction. I strongly suspect that this is nobody (except for GSimpleAction). The hiding of GSimpleActionClass only impacts impacts subclasses of GSimpleAction. I strongly suspect that none of these exist. The changing of the property to be read-only only affects people who were trying to change the state by using GObject properties. I strongly suspect that this is nobody at all. The removal of the g_action_set_state() call is the most dangerous, but I still suspect that it will impact nobody outside of GLib. If anybody is impacted by this change then, at their request, I will reintroduce the API as a deprecated alias for g_action_change_state().
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->change_state (action, value);
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g_variant_unref (value);
}
/**
* g_action_get_state:
* @action: a #GAction
*
* Queries the current state of @action.
*
* If the action is not stateful then %NULL will be returned. If the
* action is stateful then the type of the return value is the type
* given by g_action_get_state_type().
*
* 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
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*
* Since: 2.28
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**/
GVariant *
g_action_get_state (GAction *action)
{
g_return_val_if_fail (G_IS_ACTION (action), NULL);
return G_ACTION_GET_IFACE (action)
->get_state (action);
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}
/**
* g_action_get_name:
* @action: a #GAction
*
* Queries the name of @action.
*
* Returns: the name of the action
*
* Since: 2.28
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**/
const gchar *
g_action_get_name (GAction *action)
{
g_return_val_if_fail (G_IS_ACTION (action), NULL);
return G_ACTION_GET_IFACE (action)
->get_name (action);
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}
/**
* g_action_get_parameter_type:
* @action: a #GAction
*
* Queries the type of the parameter that must be given when activating
* @action.
*
* When activating the action using g_action_activate(), the #GVariant
* given to that function must be of the type returned by this function.
*
* In the case that this function returns %NULL, you must not give any
* #GVariant, but %NULL instead.
*
* Returns: (allow-none): the parameter type
*
* Since: 2.28
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**/
const GVariantType *
g_action_get_parameter_type (GAction *action)
{
g_return_val_if_fail (G_IS_ACTION (action), NULL);
return G_ACTION_GET_IFACE (action)
->get_parameter_type (action);
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}
/**
* g_action_get_state_type:
* @action: a #GAction
*
* Queries the type of the state of @action.
*
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* If the action is stateful (e.g. created with
* g_simple_action_new_stateful()) then this function returns the
* #GVariantType of the state. This is the type of the initial value
Make 4 incompatible changes to the GAction API This commit represents an API break to GAction in the following ways: - the 'set_state' entry in the GActionInterface vtable has been renamed to 'change_state'. The number and order of vtable items has not otherwise changed. - g_action_set_state() has been renamed to g_action_change_state() to match the updated vtable entry. - the "state" property of the GAction interface has been changed to read-only to reflect the fact that g_action_set_state() no longer exists. - GSimpleActionClass has been hidden. GSimpleAction can no longer be subclassed. >> Rationale g_action_set_state() has never been a true setter in the sense that calling it will update the value of the "state" property. It has always been closer to "request 'state' to be changed to this value" with semantics defined by the implementor of the interface. This is why the equivalent method in GActionGroup had its name changed from 'set' to 'change'. This change makes the two interfaces more consistent and removes any implication about the effect that calling set_state() should have on the 'state' property. >> Impact This incompatible API break was undertaken only because I strongly suspect that it will go entirely unnoticed. If the break actually affects anybody, then we will accommodate them (possibly going as far as to revert this commit entirely). The virtual table change only impacts implementors of GAction. I strongly suspect that this is nobody (except for GSimpleAction). The hiding of GSimpleActionClass only impacts impacts subclasses of GSimpleAction. I strongly suspect that none of these exist. The changing of the property to be read-only only affects people who were trying to change the state by using GObject properties. I strongly suspect that this is nobody at all. The removal of the g_action_set_state() call is the most dangerous, but I still suspect that it will impact nobody outside of GLib. If anybody is impacted by this change then, at their request, I will reintroduce the API as a deprecated alias for g_action_change_state().
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* given as the state. All calls to g_action_change_state() must give a
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* #GVariant of this type and g_action_get_state() will return a
* #GVariant of the same type.
*
* If the action is not stateful (e.g. created with g_simple_action_new())
* then this function will return %NULL. In that case, g_action_get_state()
Make 4 incompatible changes to the GAction API This commit represents an API break to GAction in the following ways: - the 'set_state' entry in the GActionInterface vtable has been renamed to 'change_state'. The number and order of vtable items has not otherwise changed. - g_action_set_state() has been renamed to g_action_change_state() to match the updated vtable entry. - the "state" property of the GAction interface has been changed to read-only to reflect the fact that g_action_set_state() no longer exists. - GSimpleActionClass has been hidden. GSimpleAction can no longer be subclassed. >> Rationale g_action_set_state() has never been a true setter in the sense that calling it will update the value of the "state" property. It has always been closer to "request 'state' to be changed to this value" with semantics defined by the implementor of the interface. This is why the equivalent method in GActionGroup had its name changed from 'set' to 'change'. This change makes the two interfaces more consistent and removes any implication about the effect that calling set_state() should have on the 'state' property. >> Impact This incompatible API break was undertaken only because I strongly suspect that it will go entirely unnoticed. If the break actually affects anybody, then we will accommodate them (possibly going as far as to revert this commit entirely). The virtual table change only impacts implementors of GAction. I strongly suspect that this is nobody (except for GSimpleAction). The hiding of GSimpleActionClass only impacts impacts subclasses of GSimpleAction. I strongly suspect that none of these exist. The changing of the property to be read-only only affects people who were trying to change the state by using GObject properties. I strongly suspect that this is nobody at all. The removal of the g_action_set_state() call is the most dangerous, but I still suspect that it will impact nobody outside of GLib. If anybody is impacted by this change then, at their request, I will reintroduce the API as a deprecated alias for g_action_change_state().
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* will return %NULL and you must not call g_action_change_state().
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*
* Returns: (allow-none): the state type, if the action is stateful
*
* Since: 2.28
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**/
const GVariantType *
g_action_get_state_type (GAction *action)
{
g_return_val_if_fail (G_IS_ACTION (action), NULL);
return G_ACTION_GET_IFACE (action)
->get_state_type (action);
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}
/**
* g_action_get_state_hint:
* @action: a #GAction
*
* Requests a hint about the valid range of values for the state of
* @action.
*
* If %NULL is returned it either means that the action is not stateful
* or that there is no hint about the valid range of values for the
* state of the action.
*
* If a #GVariant array is returned then each item in the array is a
* possible value for the state. If a #GVariant pair (ie: two-tuple) is
* returned then the tuple specifies the inclusive lower and upper bound
* of valid values for the state.
*
* In any case, the information is merely a hint. It may be possible to
* have a state value outside of the hinted range and setting a value
* within the range may fail.
*
* The return value (if non-%NULL) should be freed with
* g_variant_unref() when it is no longer required.
*
* Returns: (transfer full): the state range hint
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*
* Since: 2.28
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**/
GVariant *
g_action_get_state_hint (GAction *action)
{
g_return_val_if_fail (G_IS_ACTION (action), NULL);
return G_ACTION_GET_IFACE (action)
->get_state_hint (action);
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}
/**
* g_action_get_enabled:
* @action: a #GAction
*
* Checks if @action is currently enabled.
*
* An action must be enabled in order to be activated or in order to
* have its state changed from outside callers.
*
* Returns: whether the action is enabled
*
* Since: 2.28
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**/
gboolean
g_action_get_enabled (GAction *action)
{
g_return_val_if_fail (G_IS_ACTION (action), FALSE);
return G_ACTION_GET_IFACE (action)
->get_enabled (action);
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}
/**
* g_action_activate:
* @action: a #GAction
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* @parameter: (allow-none): the parameter to the activation
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*
* Activates the action.
*
* @parameter must be the correct type of parameter for the action (ie:
* the parameter type given at construction time). If the parameter
* type was %NULL then @parameter must also be %NULL.
*
* If the @parameter GVariant is floating, it is consumed.
*
* Since: 2.28
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**/
void
g_action_activate (GAction *action,
GVariant *parameter)
{
g_return_if_fail (G_IS_ACTION (action));
if (parameter != NULL)
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g_variant_ref_sink (parameter);
G_ACTION_GET_IFACE (action)
->activate (action, parameter);
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if (parameter != NULL)
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g_variant_unref (parameter);
}
/**
* g_action_parse_detailed_name:
* @detailed_name: a detailed action name
* @action_name: (out): the action name
* @target_value: (out): the target value, or %NULL for no target
* @error: a pointer to a %NULL #GError, or %NULL
*
* Parses a detailed action name into its separate name and target
* components.
*
* Detailed action names can have three formats.
*
* The first format is used to represent an action name with no target
* value and consists of just an action name containing no whitespace
* nor the characters ':', '(' or ')'. For example: "app.action".
*
* The second format is used to represent an action with a string-typed
* target value. The action name and target value are separated by a
* double colon ("::"). For example: "app.action::target".
*
* The third format is used to represent an action with an
* arbitrarily-typed target value. The target value follows the action
* name, surrounded in parens. For example: "app.action(42)". The
* target value is parsed using g_variant_parse(). If a tuple-typed
* value is desired, it must be specified in the same way, resulting in
* two sets of parens, for example: "app.action((1,2,3))".
*
* Returns: %TRUE if successful, else %FALSE with @error set
*
* Since: 2.38
**/
gboolean
g_action_parse_detailed_name (const gchar *detailed_name,
gchar **action_name,
GVariant **target_value,
GError **error)
{
const gchar *target;
gsize target_len;
gsize base_len;
/* We decide which format we have based on which we see first between
* '::' '(' and '\0'.
*/
if (*detailed_name == '\0' || *detailed_name == ' ')
goto bad_fmt;
base_len = strcspn (detailed_name, ": ()");
target = detailed_name + base_len;
target_len = strlen (target);
switch (target[0])
{
case ' ':
case ')':
goto bad_fmt;
case ':':
if (target[1] != ':')
goto bad_fmt;
*target_value = g_variant_ref_sink (g_variant_new_string (target + 2));
break;
case '(':
{
if (target[target_len - 1] != ')')
goto bad_fmt;
*target_value = g_variant_parse (NULL, target + 1, target + target_len - 1, NULL, error);
if (*target_value == NULL)
goto bad_fmt;
}
break;
case '\0':
*target_value = NULL;
break;
}
*action_name = g_strndup (detailed_name, base_len);
return TRUE;
bad_fmt:
if (error)
{
if (*error == NULL)
g_set_error (error, G_VARIANT_PARSE_ERROR, G_VARIANT_PARSE_ERROR_FAILED,
"Detailed action name '%s' has invalid format", detailed_name);
else
g_prefix_error (error, "Detailed action name '%s' has invalid format: ", detailed_name);
}
return FALSE;
}