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4355088644af6ece2f205da2ba5b087cb159835c
gimp/app/core/gimpcontainer.c
Michael Natterer 28e1a379e6 app: remove const qualifiers from all object parameters 
They are unreliable because every type checking cast discards them,
they are useless anyway, visual clutter, added inconsistently, and
generally suck. Wanted to do this a long time ago, it was a bad idea
in the first place.
2016-05-19 23:54:14 +02:00

1064 lines
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/* GIMP - The GNU Image Manipulation Program
* Copyright (C) 1995-1997 Spencer Kimball and Peter Mattis
*
* gimpcontainer.c
* Copyright (C) 2001 Michael Natterer <mitch@gimp.org>
*
* This program is free software: you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 3 of the License, or
* (at your option) any later version.
*
* This program 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 General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
#include "config.h"
#include <gio/gio.h>
#include <gegl.h>
#include "libgimpconfig/gimpconfig.h"
#include "core-types.h"
#include "gimp.h"
#include "gimp-memsize.h"
#include "gimpcontainer.h"
#include "gimpmarshal.h"
/* #define DEBUG_CONTAINER */
#ifdef DEBUG_CONTAINER
#define D(stmnt) stmnt
#else
#define D(stmnt)
#endif
enum
{
ADD,
REMOVE,
REORDER,
FREEZE,
THAW,
LAST_SIGNAL
};
enum
{
PROP_0,
PROP_CHILDREN_TYPE,
PROP_POLICY
};
typedef struct
{
gchar *signame;
GCallback callback;
gpointer callback_data;
GQuark quark; /* used to attach the signal id's of child signals */
} GimpContainerHandler;
struct _GimpContainerPriv
{
GType children_type;
GimpContainerPolicy policy;
gint n_children;
GList *handlers;
gint freeze_count;
};
/* local function prototypes */
static void gimp_container_config_iface_init (GimpConfigInterface *iface);
static void gimp_container_dispose (GObject *object);
static void gimp_container_set_property (GObject *object,
guint property_id,
const GValue *value,
GParamSpec *pspec);
static void gimp_container_get_property (GObject *object,
guint property_id,
GValue *value,
GParamSpec *pspec);
static gint64 gimp_container_get_memsize (GimpObject *object,
gint64 *gui_size);
static void gimp_container_real_add (GimpContainer *container,
GimpObject *object);
static void gimp_container_real_remove (GimpContainer *container,
GimpObject *object);
static gboolean gimp_container_serialize (GimpConfig *config,
GimpConfigWriter *writer,
gpointer data);
static gboolean gimp_container_deserialize (GimpConfig *config,
GScanner *scanner,
gint nest_level,
gpointer data);
static void gimp_container_disconnect_callback (GimpObject *object,
gpointer data);
G_DEFINE_TYPE_WITH_CODE (GimpContainer, gimp_container, GIMP_TYPE_OBJECT,
G_IMPLEMENT_INTERFACE (GIMP_TYPE_CONFIG,
gimp_container_config_iface_init))
#define parent_class gimp_container_parent_class
static guint container_signals[LAST_SIGNAL] = { 0, };
static void
gimp_container_class_init (GimpContainerClass *klass)
{
GObjectClass *object_class = G_OBJECT_CLASS (klass);
GimpObjectClass *gimp_object_class = GIMP_OBJECT_CLASS (klass);
container_signals[ADD] =
g_signal_new ("add",
G_TYPE_FROM_CLASS (klass),
G_SIGNAL_RUN_FIRST,
G_STRUCT_OFFSET (GimpContainerClass, add),
NULL, NULL,
gimp_marshal_VOID__OBJECT,
G_TYPE_NONE, 1,
GIMP_TYPE_OBJECT);
container_signals[REMOVE] =
g_signal_new ("remove",
G_TYPE_FROM_CLASS (klass),
G_SIGNAL_RUN_FIRST,
G_STRUCT_OFFSET (GimpContainerClass, remove),
NULL, NULL,
gimp_marshal_VOID__OBJECT,
G_TYPE_NONE, 1,
GIMP_TYPE_OBJECT);
container_signals[REORDER] =
g_signal_new ("reorder",
G_TYPE_FROM_CLASS (klass),
G_SIGNAL_RUN_FIRST,
G_STRUCT_OFFSET (GimpContainerClass, reorder),
NULL, NULL,
gimp_marshal_VOID__OBJECT_INT,
G_TYPE_NONE, 2,
GIMP_TYPE_OBJECT,
G_TYPE_INT);
container_signals[FREEZE] =
g_signal_new ("freeze",
G_TYPE_FROM_CLASS (klass),
G_SIGNAL_RUN_LAST,
G_STRUCT_OFFSET (GimpContainerClass, freeze),
NULL, NULL,
gimp_marshal_VOID__VOID,
G_TYPE_NONE, 0);
container_signals[THAW] =
g_signal_new ("thaw",
G_TYPE_FROM_CLASS (klass),
G_SIGNAL_RUN_LAST,
G_STRUCT_OFFSET (GimpContainerClass, thaw),
NULL, NULL,
gimp_marshal_VOID__VOID,
G_TYPE_NONE, 0);
object_class->dispose = gimp_container_dispose;
object_class->set_property = gimp_container_set_property;
object_class->get_property = gimp_container_get_property;
gimp_object_class->get_memsize = gimp_container_get_memsize;
klass->add = gimp_container_real_add;
klass->remove = gimp_container_real_remove;
klass->reorder = NULL;
klass->freeze = NULL;
klass->thaw = NULL;
klass->clear = NULL;
klass->have = NULL;
klass->foreach = NULL;
klass->get_child_by_name = NULL;
klass->get_child_by_index = NULL;
klass->get_child_index = NULL;
g_object_class_install_property (object_class, PROP_CHILDREN_TYPE,
g_param_spec_gtype ("children-type",
NULL, NULL,
GIMP_TYPE_OBJECT,
GIMP_PARAM_READWRITE |
G_PARAM_CONSTRUCT_ONLY));
g_object_class_install_property (object_class, PROP_POLICY,
g_param_spec_enum ("policy",
NULL, NULL,
GIMP_TYPE_CONTAINER_POLICY,
GIMP_CONTAINER_POLICY_STRONG,
GIMP_PARAM_READWRITE |
G_PARAM_CONSTRUCT_ONLY));
g_type_class_add_private (klass, sizeof (GimpContainerPriv));
}
static void
gimp_container_config_iface_init (GimpConfigInterface *iface)
{
iface->serialize = gimp_container_serialize;
iface->deserialize = gimp_container_deserialize;
}
static void
gimp_container_init (GimpContainer *container)
{
container->priv = G_TYPE_INSTANCE_GET_PRIVATE (container,
GIMP_TYPE_CONTAINER,
GimpContainerPriv);
container->priv->handlers = NULL;
container->priv->freeze_count = 0;
container->priv->children_type = G_TYPE_NONE;
container->priv->policy = GIMP_CONTAINER_POLICY_STRONG;
container->priv->n_children = 0;
}
static void
gimp_container_dispose (GObject *object)
{
GimpContainer *container = GIMP_CONTAINER (object);
gimp_container_clear (container);
while (container->priv->handlers)
gimp_container_remove_handler (container,
((GimpContainerHandler *)
container->priv->handlers->data)->quark);
if (container->priv->children_type != G_TYPE_NONE)
{
g_type_class_unref (g_type_class_peek (container->priv->children_type));
container->priv->children_type = G_TYPE_NONE;
}
G_OBJECT_CLASS (parent_class)->dispose (object);
}
static void
gimp_container_set_property (GObject *object,
guint property_id,
const GValue *value,
GParamSpec *pspec)
{
GimpContainer *container = GIMP_CONTAINER (object);
switch (property_id)
{
case PROP_CHILDREN_TYPE:
container->priv->children_type = g_value_get_gtype (value);
g_type_class_ref (container->priv->children_type);
break;
case PROP_POLICY:
container->priv->policy = g_value_get_enum (value);
break;
default:
G_OBJECT_WARN_INVALID_PROPERTY_ID (object, property_id, pspec);
break;
}
}
static void
gimp_container_get_property (GObject *object,
guint property_id,
GValue *value,
GParamSpec *pspec)
{
GimpContainer *container = GIMP_CONTAINER (object);
switch (property_id)
{
case PROP_CHILDREN_TYPE:
g_value_set_gtype (value, container->priv->children_type);
break;
case PROP_POLICY:
g_value_set_enum (value, container->priv->policy);
break;
default:
G_OBJECT_WARN_INVALID_PROPERTY_ID (object, property_id, pspec);
break;
}
}
static gint64
gimp_container_get_memsize (GimpObject *object,
gint64 *gui_size)
{
GimpContainer *container = GIMP_CONTAINER (object);
gint64 memsize = 0;
GList *list;
for (list = container->priv->handlers; list; list = g_list_next (list))
{
GimpContainerHandler *handler = list->data;
memsize += (sizeof (GList) +
sizeof (GimpContainerHandler) +
gimp_string_get_memsize (handler->signame));
}
return memsize + GIMP_OBJECT_CLASS (parent_class)->get_memsize (object,
gui_size);
}
static void
gimp_container_real_add (GimpContainer *container,
GimpObject *object)
{
container->priv->n_children++;
}
static void
gimp_container_real_remove (GimpContainer *container,
GimpObject *object)
{
container->priv->n_children--;
}
typedef struct
{
GimpConfigWriter *writer;
gpointer data;
gboolean success;
} SerializeData;
static void
gimp_container_serialize_foreach (GObject *object,
SerializeData *serialize_data)
{
GimpConfigInterface *config_iface;
const gchar *name;
config_iface = GIMP_CONFIG_GET_INTERFACE (object);
if (! config_iface)
serialize_data->success = FALSE;
if (! serialize_data->success)
return;
gimp_config_writer_open (serialize_data->writer,
g_type_name (G_TYPE_FROM_INSTANCE (object)));
name = gimp_object_get_name (object);
if (name)
gimp_config_writer_string (serialize_data->writer, name);
else
gimp_config_writer_print (serialize_data->writer, "NULL", 4);
serialize_data->success = config_iface->serialize (GIMP_CONFIG (object),
serialize_data->writer,
serialize_data->data);
gimp_config_writer_close (serialize_data->writer);
}
static gboolean
gimp_container_serialize (GimpConfig *config,
GimpConfigWriter *writer,
gpointer data)
{
GimpContainer *container = GIMP_CONTAINER (config);
SerializeData serialize_data;
serialize_data.writer = writer;
serialize_data.data = data;
serialize_data.success = TRUE;
gimp_container_foreach (container,
(GFunc) gimp_container_serialize_foreach,
&serialize_data);
return serialize_data.success;
}
static gboolean
gimp_container_deserialize (GimpConfig *config,
GScanner *scanner,
gint nest_level,
gpointer data)
{
GimpContainer *container = GIMP_CONTAINER (config);
GTokenType token;
token = G_TOKEN_LEFT_PAREN;
while (g_scanner_peek_next_token (scanner) == token)
{
token = g_scanner_get_next_token (scanner);
switch (token)
{
case G_TOKEN_LEFT_PAREN:
token = G_TOKEN_IDENTIFIER;
break;
case G_TOKEN_IDENTIFIER:
{
GimpObject *child;
GType type;
gchar *name = NULL;
gboolean add_child = FALSE;
type = g_type_from_name (scanner->value.v_identifier);
if (! type)
{
g_scanner_error (scanner,
"unable to determine type of '%s'",
scanner->value.v_identifier);
return FALSE;
}
if (! g_type_is_a (type, container->priv->children_type))
{
g_scanner_error (scanner,
"'%s' is not a subclass of '%s'",
scanner->value.v_identifier,
g_type_name (container->priv->children_type));
return FALSE;
}
if (! g_type_is_a (type, GIMP_TYPE_CONFIG))
{
g_scanner_error (scanner,
"'%s' does not implement GimpConfigInterface",
scanner->value.v_identifier);
return FALSE;
}
if (! gimp_scanner_parse_string (scanner, &name))
{
token = G_TOKEN_STRING;
break;
}
if (! name)
name = g_strdup ("");
child = gimp_container_get_child_by_name (container, name);
if (! child)
{
if (GIMP_IS_GIMP (data))
child = g_object_new (type, "gimp", data, NULL);
else
child = g_object_new (type, NULL);
add_child = TRUE;
}
/* always use the deserialized name. while it normally
* doesn't make a difference there are obscure case like
* template migration.
*/
gimp_object_take_name (child, name);
if (! GIMP_CONFIG_GET_INTERFACE (child)->deserialize (GIMP_CONFIG (child),
scanner,
nest_level + 1,
NULL))
{
if (add_child)
g_object_unref (child);
/* warning should be already set by child */
return FALSE;
}
if (add_child)
{
gimp_container_add (container, child);
if (container->priv->policy == GIMP_CONTAINER_POLICY_STRONG)
g_object_unref (child);
}
}
token = G_TOKEN_RIGHT_PAREN;
break;
case G_TOKEN_RIGHT_PAREN:
token = G_TOKEN_LEFT_PAREN;
break;
default: /* do nothing */
break;
}
}
return gimp_config_deserialize_return (scanner, token, nest_level);
}
static void
gimp_container_disconnect_callback (GimpObject *object,
gpointer data)
{
GimpContainer *container = GIMP_CONTAINER (data);
gimp_container_remove (container, object);
}
GType
gimp_container_get_children_type (GimpContainer *container)
{
g_return_val_if_fail (GIMP_IS_CONTAINER (container), G_TYPE_NONE);
return container->priv->children_type;
}
GimpContainerPolicy
gimp_container_get_policy (GimpContainer *container)
{
g_return_val_if_fail (GIMP_IS_CONTAINER (container), 0);
return container->priv->policy;
}
gint
gimp_container_get_n_children (GimpContainer *container)
{
g_return_val_if_fail (GIMP_IS_CONTAINER (container), 0);
return container->priv->n_children;
}
gboolean
gimp_container_add (GimpContainer *container,
GimpObject *object)
{
GList *list;
gint n_children;
g_return_val_if_fail (GIMP_IS_CONTAINER (container), FALSE);
g_return_val_if_fail (object != NULL, FALSE);
g_return_val_if_fail (G_TYPE_CHECK_INSTANCE_TYPE (object,
container->priv->children_type),
FALSE);
if (gimp_container_have (container, object))
{
g_warning ("%s: container %p already contains object %p",
G_STRFUNC, container, object);
return FALSE;
}
for (list = container->priv->handlers; list; list = g_list_next (list))
{
GimpContainerHandler *handler = list->data;
gulong handler_id;
handler_id = g_signal_connect (object,
handler->signame,
handler->callback,
handler->callback_data);
g_object_set_qdata (G_OBJECT (object), handler->quark,
GUINT_TO_POINTER (handler_id));
}
switch (container->priv->policy)
{
case GIMP_CONTAINER_POLICY_STRONG:
g_object_ref (object);
break;
case GIMP_CONTAINER_POLICY_WEAK:
g_signal_connect (object, "disconnect",
G_CALLBACK (gimp_container_disconnect_callback),
container);
break;
}
n_children = container->priv->n_children;
g_signal_emit (container, container_signals[ADD], 0, object);
if (n_children == container->priv->n_children)
{
g_warning ("%s: GimpContainer::add() implementation did not "
"chain up. Please report this at http://www.gimp.org/bugs/",
G_STRFUNC);
container->priv->n_children++;
}
return TRUE;
}
gboolean
gimp_container_remove (GimpContainer *container,
GimpObject *object)
{
GList *list;
gint n_children;
g_return_val_if_fail (GIMP_IS_CONTAINER (container), FALSE);
g_return_val_if_fail (object != NULL, FALSE);
g_return_val_if_fail (G_TYPE_CHECK_INSTANCE_TYPE (object,
container->priv->children_type),
FALSE);
if (! gimp_container_have (container, object))
{
g_warning ("%s: container %p does not contain object %p",
G_STRFUNC, container, object);
return FALSE;
}
for (list = container->priv->handlers; list; list = g_list_next (list))
{
GimpContainerHandler *handler = list->data;
gulong handler_id;
handler_id = GPOINTER_TO_UINT (g_object_get_qdata (G_OBJECT (object),
handler->quark));
if (handler_id)
{
g_signal_handler_disconnect (object, handler_id);
g_object_set_qdata (G_OBJECT (object), handler->quark, NULL);
}
}
n_children = container->priv->n_children;
g_signal_emit (container, container_signals[REMOVE], 0, object);
if (n_children == container->priv->n_children)
{
g_warning ("%s: GimpContainer::remove() implementation did not "
"chain up. Please report this at http://www.gimp.org/bugs/",
G_STRFUNC);
container->priv->n_children--;
}
switch (container->priv->policy)
{
case GIMP_CONTAINER_POLICY_STRONG:
g_object_unref (object);
break;
case GIMP_CONTAINER_POLICY_WEAK:
g_signal_handlers_disconnect_by_func (object,
gimp_container_disconnect_callback,
container);
break;
}
return TRUE;
}
gboolean
gimp_container_insert (GimpContainer *container,
GimpObject *object,
gint index)
{
g_return_val_if_fail (GIMP_IS_CONTAINER (container), FALSE);
g_return_val_if_fail (object != NULL, FALSE);
g_return_val_if_fail (G_TYPE_CHECK_INSTANCE_TYPE (object,
container->priv->children_type),
FALSE);
g_return_val_if_fail (index >= -1 &&
index <= container->priv->n_children, FALSE);
if (gimp_container_have (container, object))
{
g_warning ("%s: container %p already contains object %p",
G_STRFUNC, container, object);
return FALSE;
}
if (gimp_container_add (container, object))
{
return gimp_container_reorder (container, object, index);
}
return FALSE;
}
gboolean
gimp_container_reorder (GimpContainer *container,
GimpObject *object,
gint new_index)
{
gint index;
g_return_val_if_fail (GIMP_IS_CONTAINER (container), FALSE);
g_return_val_if_fail (object != NULL, FALSE);
g_return_val_if_fail (G_TYPE_CHECK_INSTANCE_TYPE (object,
container->priv->children_type),
FALSE);
g_return_val_if_fail (new_index >= -1 &&
new_index < container->priv->n_children, FALSE);
if (new_index == -1)
new_index = container->priv->n_children - 1;
index = gimp_container_get_child_index (container, object);
if (index == -1)
{
g_warning ("%s: container %p does not contain object %p",
G_STRFUNC, container, object);
return FALSE;
}
if (index != new_index)
g_signal_emit (container, container_signals[REORDER], 0,
object, new_index);
return TRUE;
}
void
gimp_container_freeze (GimpContainer *container)
{
g_return_if_fail (GIMP_IS_CONTAINER (container));
container->priv->freeze_count++;
if (container->priv->freeze_count == 1)
g_signal_emit (container, container_signals[FREEZE], 0);
}
void
gimp_container_thaw (GimpContainer *container)
{
g_return_if_fail (GIMP_IS_CONTAINER (container));
if (container->priv->freeze_count > 0)
container->priv->freeze_count--;
if (container->priv->freeze_count == 0)
g_signal_emit (container, container_signals[THAW], 0);
}
gboolean
gimp_container_frozen (GimpContainer *container)
{
g_return_val_if_fail (GIMP_IS_CONTAINER (container), FALSE);
return (container->priv->freeze_count > 0) ? TRUE : FALSE;
}
void
gimp_container_clear (GimpContainer *container)
{
g_return_if_fail (GIMP_IS_CONTAINER (container));
if (container->priv->n_children > 0)
{
gimp_container_freeze (container);
GIMP_CONTAINER_GET_CLASS (container)->clear (container);
gimp_container_thaw (container);
}
}
gboolean
gimp_container_is_empty (GimpContainer *container)
{
g_return_val_if_fail (GIMP_IS_CONTAINER (container), FALSE);
return (container->priv->n_children == 0);
}
gboolean
gimp_container_have (GimpContainer *container,
GimpObject *object)
{
g_return_val_if_fail (GIMP_IS_CONTAINER (container), FALSE);
if (container->priv->n_children < 1)
return FALSE;
return GIMP_CONTAINER_GET_CLASS (container)->have (container, object);
}
void
gimp_container_foreach (GimpContainer *container,
GFunc func,
gpointer user_data)
{
g_return_if_fail (GIMP_IS_CONTAINER (container));
g_return_if_fail (func != NULL);
if (container->priv->n_children > 0)
GIMP_CONTAINER_GET_CLASS (container)->foreach (container, func, user_data);
}
GimpObject *
gimp_container_get_child_by_name (GimpContainer *container,
const gchar *name)
{
g_return_val_if_fail (GIMP_IS_CONTAINER (container), NULL);
if (!name)
return NULL;
return GIMP_CONTAINER_GET_CLASS (container)->get_child_by_name (container,
name);
}
GimpObject *
gimp_container_get_child_by_index (GimpContainer *container,
gint index)
{
g_return_val_if_fail (GIMP_IS_CONTAINER (container), NULL);
if (index < 0 || index >= container->priv->n_children)
return NULL;
return GIMP_CONTAINER_GET_CLASS (container)->get_child_by_index (container,
index);
}
/**
* gimp_container_get_first_child:
* @container: a #GimpContainer
*
* Return value: the first child object stored in @container or %NULL if the
* container is empty
*/
GimpObject *
gimp_container_get_first_child (GimpContainer *container)
{
g_return_val_if_fail (GIMP_IS_CONTAINER (container), NULL);
if (container->priv->n_children > 0)
return GIMP_CONTAINER_GET_CLASS (container)->get_child_by_index (container,
0);
return NULL;
}
/**
* gimp_container_get_last_child:
* @container: a #GimpContainer
*
* Return value: the last child object stored in @container or %NULL if the
* container is empty
*/
GimpObject *
gimp_container_get_last_child (GimpContainer *container)
{
g_return_val_if_fail (GIMP_IS_CONTAINER (container), NULL);
if (container->priv->n_children > 0)
return GIMP_CONTAINER_GET_CLASS (container)->get_child_by_index (container,
container->priv->n_children - 1);
return NULL;
}
gint
gimp_container_get_child_index (GimpContainer *container,
GimpObject *object)
{
g_return_val_if_fail (GIMP_IS_CONTAINER (container), -1);
g_return_val_if_fail (object != NULL, -1);
g_return_val_if_fail (G_TYPE_CHECK_INSTANCE_TYPE (object,
container->priv->children_type),
-1);
return GIMP_CONTAINER_GET_CLASS (container)->get_child_index (container,
object);
}
GimpObject *
gimp_container_get_neighbor_of (GimpContainer *container,
GimpObject *object)
{
gint index;
g_return_val_if_fail (GIMP_IS_CONTAINER (container), NULL);
g_return_val_if_fail (GIMP_IS_OBJECT (object), NULL);
index = gimp_container_get_child_index (container, object);
if (index != -1)
{
GimpObject *new;
new = gimp_container_get_child_by_index (container, index + 1);
if (! new && index > 0)
new = gimp_container_get_child_by_index (container, index - 1);
return new;
}
return NULL;
}
static void
gimp_container_get_name_array_foreach_func (GimpObject *object,
gchar ***iter)
{
gchar **array = *iter;
*array = g_strdup (gimp_object_get_name (object));
(*iter)++;
}
gchar **
gimp_container_get_name_array (GimpContainer *container,
gint *length)
{
gchar **names;
gchar **iter;
g_return_val_if_fail (GIMP_IS_CONTAINER (container), NULL);
g_return_val_if_fail (length != NULL, NULL);
*length = gimp_container_get_n_children (container);
if (*length == 0)
return NULL;
names = iter = g_new (gchar *, *length);
gimp_container_foreach (container,
(GFunc) gimp_container_get_name_array_foreach_func,
&iter);
return names;
}
static void
gimp_container_add_handler_foreach_func (GimpObject *object,
GimpContainerHandler *handler)
{
gulong handler_id;
handler_id = g_signal_connect (object,
handler->signame,
handler->callback,
handler->callback_data);
g_object_set_qdata (G_OBJECT (object), handler->quark,
GUINT_TO_POINTER (handler_id));
}
GQuark
gimp_container_add_handler (GimpContainer *container,
const gchar *signame,
GCallback callback,
gpointer callback_data)
{
GimpContainerHandler *handler;
gchar *key;
static gint handler_id = 0;
g_return_val_if_fail (GIMP_IS_CONTAINER (container), 0);
g_return_val_if_fail (signame != NULL, 0);
g_return_val_if_fail (callback != NULL, 0);
if (! g_str_has_prefix (signame, "notify::"))
g_return_val_if_fail (g_signal_lookup (signame,
container->priv->children_type), 0);
handler = g_slice_new0 (GimpContainerHandler);
/* create a unique key for this handler */
key = g_strdup_printf ("%s-%d", signame, handler_id++);
handler->signame = g_strdup (signame);
handler->callback = callback;
handler->callback_data = callback_data;
handler->quark = g_quark_from_string (key);
D (g_print ("%s: key = %s, id = %d\n", G_STRFUNC, key, handler->quark));
g_free (key);
container->priv->handlers = g_list_prepend (container->priv->handlers, handler);
gimp_container_foreach (container,
(GFunc) gimp_container_add_handler_foreach_func,
handler);
return handler->quark;
}
static void
gimp_container_remove_handler_foreach_func (GimpObject *object,
GimpContainerHandler *handler)
{
gulong handler_id;
handler_id = GPOINTER_TO_UINT (g_object_get_qdata (G_OBJECT (object),
handler->quark));
if (handler_id)
{
g_signal_handler_disconnect (object, handler_id);
g_object_set_qdata (G_OBJECT (object), handler->quark, NULL);
}
}
void
gimp_container_remove_handler (GimpContainer *container,
GQuark id)
{
GimpContainerHandler *handler;
GList *list;
g_return_if_fail (GIMP_IS_CONTAINER (container));
g_return_if_fail (id != 0);
for (list = container->priv->handlers; list; list = g_list_next (list))
{
handler = (GimpContainerHandler *) list->data;
if (handler->quark == id)
break;
}
if (! list)
{
g_warning ("%s: tried to remove handler which unknown id %d",
G_STRFUNC, id);
return;
}
D (g_print ("%s: id = %d\n", G_STRFUNC, handler->quark));
gimp_container_foreach (container,
(GFunc) gimp_container_remove_handler_foreach_func,
handler);
container->priv->handlers = g_list_remove (container->priv->handlers, handler);
g_free (handler->signame);
g_slice_free (GimpContainerHandler, handler);
}
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