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gem-graph-client/libide/core/ide-object.c

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/* ide-object.c
*
* Copyright 2014-2019 Christian Hergert <chergert@redhat.com>
*
* 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/>.
*
* SPDX-License-Identifier: GPL-3.0-or-later
*/
#define G_LOG_DOMAIN "ide-object"
#include "config.h"
#include "ide-context.h"
#include "ide-object.h"
#include "ide-macros.h"
/**
* SECTION:ide-object
* @title: IdeObject
* @short_description: Base object with support for object trees
*
* #IdeObject is a specialized #GObject for use in Builder. It provides a
* hierarchy of objects using a specialized tree similar to a DOM. You can
* insert/append/prepend objects to a parent node, and track their lifetime
* as part of the tree.
*
* When an object is removed from the tree, it can automatically be destroyed
* via the #IdeObject::destroy signal. This is useful as it may cause the
* children of that object to be removed, recursively destroying the objects
* descendants. This behavior is ideal when you want a large amount of objects
* to be reclaimed once an ancestor is no longer necessary.
*
* #IdeObject's may also have a #GCancellable associated with them. The
* cancellable is created on demand when ide_object_ref_cancellable() is
* called. When the object is destroyed, the #GCancellable::cancel signal
* is emitted. This allows automatic cleanup of asynchronous operations
* when used properly.
*
* Since: 3.32
*/
typedef struct
{
GRecMutex mutex;
GCancellable *cancellable;
IdeObject *parent;
GQueue children;
GList link;
guint in_destruction : 1;
guint destroyed : 1;
} IdeObjectPrivate;
typedef struct
{
GType type;
IdeObject *child;
} GetChildTyped;
typedef struct
{
GType type;
GPtrArray *array;
} GetChildrenTyped;
enum {
PROP_0,
PROP_CANCELLABLE,
PROP_PARENT,
N_PROPS
};
enum {
DESTROY,
N_SIGNALS
};
G_DEFINE_TYPE_WITH_PRIVATE (IdeObject, ide_object, G_TYPE_OBJECT)
static GParamSpec *properties [N_PROPS];
static guint signals [N_SIGNALS];
static inline void
ide_object_private_lock (IdeObjectPrivate *priv)
{
g_rec_mutex_lock (&priv->mutex);
}
static inline void
ide_object_private_unlock (IdeObjectPrivate *priv)
{
g_rec_mutex_unlock (&priv->mutex);
}
static gboolean
check_disposition (IdeObject *child,
IdeObject *parent,
IdeObjectPrivate *sibling_priv)
{
IdeObjectPrivate *priv = ide_object_get_instance_private (child);
if (priv->parent != NULL)
{
g_critical ("Attempt to add %s to %s, but it already has a parent",
G_OBJECT_TYPE_NAME (child),
G_OBJECT_TYPE_NAME (parent));
return FALSE;
}
if (sibling_priv && sibling_priv->parent != parent)
{
g_critical ("Attempt to add child relative to sibling of another parent");
return FALSE;
}
return TRUE;
}
static gchar *
ide_object_real_repr (IdeObject *self)
{
return g_strdup (G_OBJECT_TYPE_NAME (self));
}
static void
ide_object_real_add (IdeObject *self,
IdeObject *sibling,
IdeObject *child,
IdeObjectLocation location)
{
IdeObjectPrivate *priv = ide_object_get_instance_private (self);
IdeObjectPrivate *child_priv = ide_object_get_instance_private (child);
IdeObjectPrivate *sibling_priv = ide_object_get_instance_private (sibling);
g_assert (IDE_IS_OBJECT (self));
g_assert (IDE_IS_OBJECT (child));
g_assert (!sibling || IDE_IS_OBJECT (sibling));
if (location == IDE_OBJECT_BEFORE_SIBLING ||
location == IDE_OBJECT_AFTER_SIBLING)
g_return_if_fail (IDE_IS_OBJECT (sibling));
ide_object_private_lock (priv);
ide_object_private_lock (child_priv);
if (sibling)
ide_object_private_lock (sibling_priv);
if (!check_disposition (child, self, NULL))
goto unlock;
switch (location)
{
case IDE_OBJECT_START:
g_queue_push_head_link (&priv->children, &child_priv->link);
break;
case IDE_OBJECT_END:
g_queue_push_tail_link (&priv->children, &child_priv->link);
break;
case IDE_OBJECT_BEFORE_SIBLING:
_g_queue_insert_before_link (&priv->children, &sibling_priv->link, &child_priv->link);
break;
case IDE_OBJECT_AFTER_SIBLING:
_g_queue_insert_after_link (&priv->children, &sibling_priv->link, &child_priv->link);
break;
default:
g_critical ("Invalid location to add object child");
goto unlock;
}
child_priv->parent = self;
g_object_ref (child);
if (IDE_OBJECT_GET_CLASS (child)->parent_set)
IDE_OBJECT_GET_CLASS (child)->parent_set (child, self);
unlock:
if (sibling)
ide_object_private_unlock (sibling_priv);
ide_object_private_unlock (child_priv);
ide_object_private_unlock (priv);
}
static void
ide_object_real_remove (IdeObject *self,
IdeObject *child)
{
IdeObjectPrivate *priv = ide_object_get_instance_private (self);
IdeObjectPrivate *child_priv = ide_object_get_instance_private (child);
g_assert (IDE_IS_OBJECT (self));
g_assert (IDE_IS_OBJECT (child));
ide_object_private_lock (priv);
ide_object_private_lock (child_priv);
g_assert (child_priv->parent == self);
if (child_priv->parent != self)
{
g_critical ("Attempt to remove child object from incorrect parent");
ide_object_private_unlock (child_priv);
ide_object_private_unlock (priv);
return;
}
g_queue_unlink (&priv->children, &child_priv->link);
child_priv->parent = NULL;
if (IDE_OBJECT_GET_CLASS (child)->parent_set)
IDE_OBJECT_GET_CLASS (child)->parent_set (child, NULL);
ide_object_private_unlock (child_priv);
ide_object_private_unlock (priv);
g_object_unref (child);
}
static void
ide_object_real_destroy (IdeObject *self)
{
IdeObjectPrivate *priv = ide_object_get_instance_private (self);
IdeObject *hold = NULL;
g_assert (IDE_IS_OBJECT (self));
/* We already hold the instance lock, for destroy */
g_cancellable_cancel (priv->cancellable);
if (priv->parent != NULL)
{
hold = g_object_ref (self);
ide_object_remove (priv->parent, self);
}
g_assert (priv->parent == NULL);
g_assert (priv->link.prev == NULL);
g_assert (priv->link.next == NULL);
while (priv->children.head != NULL)
{
IdeObject *child = priv->children.head->data;
ide_object_destroy (child);
}
g_assert (priv->children.tail == NULL);
g_assert (priv->children.head == NULL);
g_assert (priv->children.length == 0);
g_assert (priv->parent == NULL);
g_assert (priv->link.prev == NULL);
g_assert (priv->link.next == NULL);
priv->destroyed = TRUE;
if (hold != NULL)
g_object_unref (hold);
}
static gboolean
ide_object_destroy_in_main_cb (IdeObject *object)
{
g_assert (IDE_IS_MAIN_THREAD ());
g_assert (IDE_IS_OBJECT (object));
ide_object_destroy (object);
return G_SOURCE_REMOVE;
}
void
ide_object_destroy (IdeObject *self)
{
IdeObjectPrivate *priv = ide_object_get_instance_private (self);
g_return_if_fail (IDE_IS_OBJECT (self));
g_object_ref (self);
ide_object_private_lock (priv);
/* If we are not on the main thread, we want to detach from the
* object tree and then dispatch the rest of the destroy to the
* main thread (so no threaded cleanup can occur).
*/
if (IDE_IS_MAIN_THREAD ())
{
g_cancellable_cancel (priv->cancellable);
if (!priv->in_destruction && !priv->destroyed)
g_object_run_dispose (G_OBJECT (self));
}
else
{
g_autoptr(IdeObject) parent = NULL;
if ((parent = ide_object_ref_parent (self)))
ide_object_remove (parent, self);
g_idle_add_full (G_PRIORITY_LOW + 1000,
(GSourceFunc)ide_object_destroy_in_main_cb,
g_object_ref (self),
g_object_unref);
}
ide_object_private_unlock (priv);
g_object_unref (self);
}
static gboolean
ide_object_dispose_from_main_cb (gpointer user_data)
{
IdeObject *self = user_data;
g_object_run_dispose (G_OBJECT (self));
return G_SOURCE_REMOVE;
}
static void
ide_object_dispose (GObject *object)
{
IdeObject *self = (IdeObject *)object;
IdeObjectPrivate *priv = ide_object_get_instance_private (self);
if (!IDE_IS_MAIN_THREAD ())
{
/* We are not on the main thread and might lose our last reference count.
* Pass this object to the main thread for disposal. This usually only
* happens when an object was temporarily created/destroyed on a thread.
*/
g_idle_add_full (G_PRIORITY_LOW + 1000,
ide_object_dispose_from_main_cb,
g_object_ref (self),
g_object_unref);
return;
}
g_assert (IDE_IS_OBJECT (object));
ide_object_private_lock (priv);
if (!priv->in_destruction)
{
priv->in_destruction = TRUE;
g_signal_emit (self, signals [DESTROY], 0);
priv->in_destruction = FALSE;
}
ide_object_private_unlock (priv);
G_OBJECT_CLASS (ide_object_parent_class)->dispose (object);
}
static void
ide_object_finalize (GObject *object)
{
IdeObject *self = (IdeObject *)object;
IdeObjectPrivate *priv = ide_object_get_instance_private (self);
if (!IDE_IS_MAIN_THREAD ())
{
g_critical ("Attempt to finalize %s on a thread which is not allowed. Leaking instead.",
G_OBJECT_TYPE_NAME (object));
return;
}
g_assert (priv->parent == NULL);
g_assert (priv->children.length == 0);
g_assert (priv->children.head == NULL);
g_assert (priv->children.tail == NULL);
g_assert (priv->link.prev == NULL);
g_assert (priv->link.next == NULL);
g_clear_object (&priv->cancellable);
g_rec_mutex_clear (&priv->mutex);
G_OBJECT_CLASS (ide_object_parent_class)->finalize (object);
}
static void
ide_object_get_property (GObject *object,
guint prop_id,
GValue *value,
GParamSpec *pspec)
{
IdeObject *self = IDE_OBJECT (object);
switch (prop_id)
{
case PROP_PARENT:
g_value_take_object (value, ide_object_ref_parent (self));
break;
case PROP_CANCELLABLE:
g_value_take_object (value, ide_object_ref_cancellable (self));
break;
default:
G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
}
}
static void
ide_object_set_property (GObject *object,
guint prop_id,
const GValue *value,
GParamSpec *pspec)
{
IdeObject *self = IDE_OBJECT (object);
IdeObjectPrivate *priv = ide_object_get_instance_private (self);
switch (prop_id)
{
case PROP_CANCELLABLE:
priv->cancellable = g_value_dup_object (value);
break;
case PROP_PARENT:
{
IdeObject *parent = g_value_get_object (value);
if (parent != NULL)
ide_object_append (parent, IDE_OBJECT (self));
}
break;
default:
G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
}
}
static void
ide_object_class_init (IdeObjectClass *klass)
{
GObjectClass *object_class = G_OBJECT_CLASS (klass);
object_class->dispose = ide_object_dispose;
object_class->finalize = ide_object_finalize;
object_class->get_property = ide_object_get_property;
object_class->set_property = ide_object_set_property;
klass->add = ide_object_real_add;
klass->remove = ide_object_real_remove;
klass->destroy = ide_object_real_destroy;
klass->repr = ide_object_real_repr;
/**
* IdeObject:parent:
*
* The parent #IdeObject, if any.
*
* Since: 3.32
*/
properties [PROP_PARENT] =
g_param_spec_object ("parent",
"Parent",
"The parent IdeObject",
IDE_TYPE_OBJECT,
(G_PARAM_READWRITE | G_PARAM_CONSTRUCT_ONLY | G_PARAM_STATIC_STRINGS));
/**
* IdeObject:cancellable:
*
* The "cancellable" property is a #GCancellable that can be used by operations
* that will be cancelled when the #IdeObject::destroy signal is emitted on @self.
*
* This is convenient when you want operations to automatically be cancelled when
* part of teh object tree is segmented.
*
* Since: 3.32
*/
properties [PROP_CANCELLABLE] =
g_param_spec_object ("cancellable",
"Cancellable",
"A GCancellable for the object to use in operations",
G_TYPE_CANCELLABLE,
(G_PARAM_READWRITE | G_PARAM_CONSTRUCT_ONLY | G_PARAM_STATIC_STRINGS));
g_object_class_install_properties (object_class, N_PROPS, properties);
/**
* IdeObject::destroy:
*
* The "destroy" signal is emitted when the object should destroy itself
* and cleanup any state that is no longer necessary. This happens when
* the object has been removed from the because it was requested to be
* destroyed, or because a parent object is being destroyed.
*
* If you do not want to receive the "destroy" signal, then you must
* manually remove the object from the tree using ide_object_remove()
* while holding a reference to the object.
*
* Since: 3.32
*/
signals [DESTROY] =
g_signal_new ("destroy",
G_TYPE_FROM_CLASS (klass),
(G_SIGNAL_RUN_CLEANUP | G_SIGNAL_NO_RECURSE | G_SIGNAL_NO_HOOKS),
G_STRUCT_OFFSET (IdeObjectClass, destroy),
NULL, NULL,
g_cclosure_marshal_VOID__VOID,
G_TYPE_NONE, 0);
g_signal_set_va_marshaller (signals [DESTROY],
G_TYPE_FROM_CLASS (klass),
g_cclosure_marshal_VOID__VOIDv);
}
static void
ide_object_init (IdeObject *self)
{
IdeObjectPrivate *priv = ide_object_get_instance_private (self);
priv->link.data = self;
g_rec_mutex_init (&priv->mutex);
}
/**
* ide_object_new:
* @type: a #GType of an #IdeObject derived object
* @parent: (nullable): an optional #IdeObject parent
*
* This is a convenience function for creating an #IdeObject and appending it
* to a parent.
*
* This function may only be called from the main-thread, as calling from any
* other thread would potentially risk being disposed before returning.
*
* Returns: (transfer full) (type IdeObject): a new #IdeObject
*
* Since: 3.32
*/
gpointer
ide_object_new (GType type,
IdeObject *parent)
{
IdeObject *ret;
g_return_val_if_fail (IDE_IS_MAIN_THREAD (), NULL);
g_return_val_if_fail (g_type_is_a (type, IDE_TYPE_OBJECT), NULL);
g_return_val_if_fail (!parent || IDE_IS_OBJECT (parent), NULL);
ret = g_object_new (type, NULL);
if (parent != NULL)
ide_object_append (parent, ret);
return g_steal_pointer (&ret);
}
/**
* ide_object_get_n_children:
* @self: a #IdeObject
*
* Gets the number of children for an object.
*
* Returns: the number of children
*
* Since: 3.32
*/
guint
ide_object_get_n_children (IdeObject *self)
{
IdeObjectPrivate *priv = ide_object_get_instance_private (self);
guint ret;
g_return_val_if_fail (IDE_IS_OBJECT (self), 0);
ide_object_private_lock (priv);
ret = priv->children.length;
ide_object_private_unlock (priv);
return ret;
}
/**
* ide_object_get_nth_child:
* @self: a #IdeObject
* @nth: position of child to fetch
*
* Gets the @nth child of @self.
*
* A full reference to the child is returned.
*
* Returns: (transfer full) (nullable): an #IdeObject or %NULL
*
* Since: 3.32
*/
IdeObject *
ide_object_get_nth_child (IdeObject *self,
guint nth)
{
IdeObjectPrivate *priv = ide_object_get_instance_private (self);
IdeObject *ret;
g_return_val_if_fail (IDE_IS_OBJECT (self), 0);
ide_object_private_lock (priv);
ret = g_list_nth_data (priv->children.head, nth);
if (ret != NULL)
g_object_ref (ret);
ide_object_private_unlock (priv);
g_return_val_if_fail (!ret || IDE_IS_OBJECT (ret), NULL);
return g_steal_pointer (&ret);
}
/**
* ide_object_get_position:
* @self: a #IdeObject
*
* Gets the position of @self within the parent node.
*
* Returns: the position, starting from 0
*
* Since: 3.32
*/
guint
ide_object_get_position (IdeObject *self)
{
IdeObjectPrivate *priv = ide_object_get_instance_private (self);
guint ret = 0;
g_return_val_if_fail (IDE_IS_OBJECT (self), 0);
ide_object_private_lock (priv);
if (priv->parent != NULL)
{
IdeObjectPrivate *parent_priv = ide_object_get_instance_private (priv->parent);
ret = g_list_position (parent_priv->children.head, &priv->link);
}
ide_object_private_unlock (priv);
return ret;
}
/**
* ide_object_lock:
* @self: a #IdeObject
*
* Acquires the lock for @self. This can be useful when you need to do
* multi-threaded work with @self and want to ensure exclusivity.
*
* Call ide_object_unlock() to release the lock.
*
* The synchronization used is a #GRecMutex.
*
* Since: 3.32
*/
void
ide_object_lock (IdeObject *self)
{
IdeObjectPrivate *priv = ide_object_get_instance_private (self);
g_return_if_fail (IDE_IS_OBJECT (self));
ide_object_private_lock (priv);
}
/**
* ide_object_unlock:
* @self: a #IdeObject
*
* Releases a previously acuiqred lock from ide_object_lock().
*
* The synchronization used is a #GRecMutex.
*
* Since: 3.32
*/
void
ide_object_unlock (IdeObject *self)
{
IdeObjectPrivate *priv = ide_object_get_instance_private (self);
g_return_if_fail (IDE_IS_OBJECT (self));
ide_object_private_unlock (priv);
}
/**
* ide_object_ref_cancellable:
* @self: a #IdeObject
*
* Gets a #GCancellable for the object.
*
* Returns: (transfer none) (not nullable): a #GCancellable
*
* Since: 3.32
*/
GCancellable *
ide_object_ref_cancellable (IdeObject *self)
{
IdeObjectPrivate *priv = ide_object_get_instance_private (self);
GCancellable *ret;
g_return_val_if_fail (IDE_IS_OBJECT (self), NULL);
ide_object_private_lock (priv);
if (priv->cancellable == NULL)
priv->cancellable = g_cancellable_new ();
ret = g_object_ref (priv->cancellable);
ide_object_private_unlock (priv);
return g_steal_pointer (&ret);
}
/**
* ide_object_get_parent:
* @self: a #IdeObject
*
* Gets the parent #IdeObject, if any.
*
* This function may only be called from the main thread.
*
* Returns: (transfer none) (nullable): an #IdeObject or %NULL
*
* Since: 3.32
*/
IdeObject *
ide_object_get_parent (IdeObject *self)
{
IdeObjectPrivate *priv = ide_object_get_instance_private (self);
IdeObject *ret;
g_return_val_if_fail (IDE_IS_MAIN_THREAD (), NULL);
g_return_val_if_fail (IDE_IS_OBJECT (self), NULL);
ide_object_private_lock (priv);
ret = priv->parent;
ide_object_private_unlock (priv);
return g_steal_pointer (&ret);
}
/**
* ide_object_ref_parent:
* @self: a #IdeObject
*
* Gets the parent #IdeObject, if any.
*
* Returns: (transfer full) (nullable): an #IdeObject or %NULL
*
* Since: 3.32
*/
IdeObject *
ide_object_ref_parent (IdeObject *self)
{
IdeObjectPrivate *priv = ide_object_get_instance_private (self);
IdeObject *ret;
g_return_val_if_fail (IDE_IS_OBJECT (self), NULL);
ide_object_private_lock (priv);
ret = priv->parent ? g_object_ref (priv->parent) : NULL;
ide_object_private_unlock (priv);
return g_steal_pointer (&ret);
}
/**
* ide_object_is_root:
* @self: a #IdeObject
*
* Checks if @self is root, meaning it has no parent.
*
* Returns: %TRUE if @self has no parent
*
* Since: 3.32
*/
gboolean
ide_object_is_root (IdeObject *self)
{
IdeObjectPrivate *priv = ide_object_get_instance_private (self);
gboolean ret;
g_return_val_if_fail (IDE_IS_OBJECT (self), FALSE);
ide_object_private_lock (priv);
ret = priv->parent == NULL;
ide_object_private_unlock (priv);
return ret;
}
/**
* ide_object_add:
* @self: an #IdeObject
* @sibling: (nullable): an #IdeObject or %NULL
* @child: an #IdeObject
* @location: location for child
*
* Adds @child to @self, with location dependent on @location.
*
* Generally, it is simpler to use the helper functions such as
* ide_object_append(), ide_object_prepend(), ide_object_insert_before(),
* or ide_object_insert_after().
*
* This function is primarily meant for consumers that don't know the
* relative position they need until runtime.
*
* Since: 3.32
*/
void
ide_object_add (IdeObject *self,
IdeObject *sibling,
IdeObject *child,
IdeObjectLocation location)
{
g_return_if_fail (IDE_IS_OBJECT (self));
g_return_if_fail (IDE_IS_OBJECT (child));
if (location == IDE_OBJECT_BEFORE_SIBLING ||
location == IDE_OBJECT_AFTER_SIBLING)
g_return_if_fail (IDE_IS_OBJECT (sibling));
else
g_return_if_fail (sibling == NULL);
IDE_OBJECT_GET_CLASS (self)->add (self, sibling, child, location);
}
/**
* ide_object_remove:
* @self: an #IdeObject
* @child: an #IdeObject
*
* Removes @child from @self.
*
* If @child is a borrowed reference, it may be finalized before this
* function returns.
*
* Since: 3.32
*/
void
ide_object_remove (IdeObject *self,
IdeObject *child)
{
g_return_if_fail (IDE_IS_OBJECT (self));
g_return_if_fail (IDE_IS_OBJECT (child));
IDE_OBJECT_GET_CLASS (self)->remove (self, child);
}
/**
* ide_object_append:
* @self: an #IdeObject
* @child: an #IdeObject
*
* Inserts @child as the last child of @self.
*
* Since: 3.32
*/
void
ide_object_append (IdeObject *self,
IdeObject *child)
{
ide_object_add (self, NULL, child, IDE_OBJECT_END);
}
/**
* ide_object_prepend:
* @self: an #IdeObject
* @child: an #IdeObject
*
* Inserts @child as the first child of @self.
*
* Since: 3.32
*/
void
ide_object_prepend (IdeObject *self,
IdeObject *child)
{
ide_object_add (self, NULL, child, IDE_OBJECT_START);
}
/**
* ide_object_insert_before:
* @self: an #IdeObject
* @sibling: an #IdeObject
* @child: an #IdeObject
*
* Inserts @child into @self's children, directly before @sibling.
*
* @sibling MUST BE a child of @self.
*
* Since: 3.32
*/
void
ide_object_insert_before (IdeObject *self,
IdeObject *sibling,
IdeObject *child)
{
ide_object_add (self, sibling, child, IDE_OBJECT_BEFORE_SIBLING);
}
/**
* ide_object_insert_after:
* @self: an #IdeObject
* @sibling: an #IdeObject
* @child: an #IdeObject
*
* Inserts @child into @self's children, directly after @sibling.
*
* @sibling MUST BE a child of @self.
*
* Since: 3.32
*/
void
ide_object_insert_after (IdeObject *self,
IdeObject *sibling,
IdeObject *child)
{
ide_object_add (self, sibling, child, IDE_OBJECT_AFTER_SIBLING);
}
/**
* ide_object_insert_sorted:
* @self: a #IdeObject
* @child: an #IdeObject
* @func: (scope call): a #GCompareDataFunc that can be used to locate the
* proper sibling
* @user_data: user data for @func
*
* Locates the proper sibling for @child by using @func amongst @self's
* children #IdeObject. Those objects must already be sorted.
*
* Since: 3.32
*/
void
ide_object_insert_sorted (IdeObject *self,
IdeObject *child,
GCompareDataFunc func,
gpointer user_data)
{
IdeObjectPrivate *priv = ide_object_get_instance_private (self);
g_return_if_fail (IDE_IS_OBJECT (self));
g_return_if_fail (IDE_IS_OBJECT (child));
g_return_if_fail (func != NULL);
ide_object_lock (self);
if (priv->children.length == 0)
{
ide_object_prepend (self, child);
goto unlock;
}
g_assert (priv->children.head != NULL);
g_assert (priv->children.tail != NULL);
for (GList *iter = priv->children.head; iter; iter = iter->next)
{
IdeObject *other = iter->data;
g_assert (IDE_IS_OBJECT (other));
if (func (child, other, user_data) <= 0)
{
ide_object_insert_before (self, other, child);
goto unlock;
}
}
ide_object_append (self, child);
unlock:
ide_object_unlock (self);
}
/**
* ide_object_foreach:
* @self: a #IdeObject
* @callback: (scope call): a #GFunc to call for each child
* @user_data: closure data for @callback
*
* Calls @callback for each child of @self.
*
* @callback is allowed to remove children from @self, but only as long as they are
* the child passed to callback (or child itself). See g_queue_foreach() for more
* details about what is allowed.
*
* Since: 3.32
*/
void
ide_object_foreach (IdeObject *self,
GFunc callback,
gpointer user_data)
{
IdeObjectPrivate *priv = ide_object_get_instance_private (self);
g_return_if_fail (IDE_IS_OBJECT (self));
g_return_if_fail (callback != NULL);
ide_object_private_lock (priv);
g_queue_foreach (&priv->children, callback, user_data);
ide_object_private_unlock (priv);
}
static void
get_child_typed_cb (gpointer data,
gpointer user_data)
{
IdeObject *child = data;
GetChildTyped *q = user_data;
if (q->child != NULL)
return;
if (G_TYPE_CHECK_INSTANCE_TYPE (child, q->type))
q->child = g_object_ref (child);
}
/**
* ide_object_get_child_typed:
* @self: a #IdeObject
* @type: the #GType of the child to match
*
* Finds the first child of @self that is of @type.
*
* Returns: (transfer full) (type IdeObject) (nullable): an #IdeObject or %NULL
*
* Since: 3.32
*/
gpointer
ide_object_get_child_typed (IdeObject *self,
GType type)
{
GetChildTyped q = { type, NULL };
g_return_val_if_fail (IDE_IS_OBJECT (self), NULL);
g_return_val_if_fail (g_type_is_a (type, IDE_TYPE_OBJECT), NULL);
ide_object_foreach (self, get_child_typed_cb, &q);
return g_steal_pointer (&q.child);
}
static void
get_children_typed_cb (gpointer data,
gpointer user_data)
{
IdeObject *child = data;
GetChildrenTyped *q = user_data;
if (G_TYPE_CHECK_INSTANCE_TYPE (child, q->type))
g_ptr_array_add (q->array, g_object_ref (child));
}
/**
* ide_object_get_children_typed:
* @self: a #IdeObject
* @type: a #GType
*
* Gets all children matching @type.
*
* Returns: (transfer full) (element-type IdeObject): a #GPtrArray of
* #IdeObject matching @type.
*
* Since: 3.32
*/
GPtrArray *
ide_object_get_children_typed (IdeObject *self,
GType type)
{
g_autoptr(GPtrArray) ar = NULL;
GetChildrenTyped q;
g_return_val_if_fail (IDE_IS_OBJECT (self), NULL);
g_return_val_if_fail (g_type_is_a (type, IDE_TYPE_OBJECT), NULL);
ar = g_ptr_array_new ();
q.type = type;
q.array = ar;
ide_object_foreach (self, get_children_typed_cb, &q);
return g_steal_pointer (&ar);
}
/**
* ide_object_ref_root:
* @self: a #IdeObject
*
* Finds and returns the toplevel object in the tree.
*
* Returns: (transfer full): an #IdeObject
*
* Since: 3.32
*/
IdeObject *
ide_object_ref_root (IdeObject *self)
{
IdeObject *cur;
g_return_val_if_fail (IDE_IS_OBJECT (self), NULL);
cur = g_object_ref (self);
while (!ide_object_is_root (cur))
{
IdeObject *tmp = cur;
cur = ide_object_ref_parent (tmp);
g_object_unref (tmp);
}
return g_steal_pointer (&cur);
}
static void
ide_object_async_init_cb (GObject *object,
GAsyncResult *result,
gpointer user_data)
{
GAsyncInitable *initable = (GAsyncInitable *)object;
g_autoptr(IdeObject) self = user_data;
g_autoptr(GError) error = NULL;
g_assert (G_IS_ASYNC_INITABLE (initable));
g_assert (G_IS_ASYNC_RESULT (result));
g_assert (IDE_IS_OBJECT (self));
if (!g_async_initable_init_finish (initable, result, &error))
{
g_warning ("Failed to initialize %s: %s",
G_OBJECT_TYPE_NAME (initable),
error->message);
ide_object_destroy (IDE_OBJECT (initable));
}
}
/**
* ide_object_ensure_child_typed:
* @self: a #IdeObject
* @type: the #GType of the child
*
* Like ide_object_get_child_typed() except that it creates an object of
* @type if it is missing.
*
* Returns: (transfer full) (nullable) (type IdeObject): an #IdeObject or %NULL
*
* Since: 3.32
*/
gpointer
ide_object_ensure_child_typed (IdeObject *self,
GType type)
{
IdeObjectPrivate *priv = ide_object_get_instance_private (self);
g_autoptr(IdeObject) ret = NULL;
g_return_val_if_fail (IDE_IS_OBJECT (self), NULL);
g_return_val_if_fail (g_type_is_a (type, IDE_TYPE_OBJECT), NULL);
g_return_val_if_fail (!ide_object_in_destruction (self), NULL);
ide_object_private_lock (priv);
if (!(ret = ide_object_get_child_typed (self, type)))
{
g_autoptr(GError) error = NULL;
ret = ide_object_new (type, self);
if (G_IS_INITABLE (ret))
{
if (!g_initable_init (G_INITABLE (ret), NULL, &error))
g_warning ("Failed to initialize %s: %s",
G_OBJECT_TYPE_NAME (ret), error->message);
}
else if (G_IS_ASYNC_INITABLE (ret))
{
g_async_initable_init_async (G_ASYNC_INITABLE (ret),
G_PRIORITY_DEFAULT,
priv->cancellable,
ide_object_async_init_cb,
g_object_ref (self));
}
}
ide_object_private_unlock (priv);
return g_steal_pointer (&ret);
}
/**
* ide_object_destroyed:
* @self: a #IdeObject
*
* This function sets *object_pointer to NULL if object_pointer != NULL. It's
* intended to be used as a callback connected to the "destroy" signal of a
* object. You connect ide_object_destroyed() as a signal handler, and pass the
* address of your object variable as user data. Then when the object is
* destroyed, the variable will be set to NULL. Useful for example to avoid
* multiple copies of the same dialog.
*
* Since: 3.32
*/
void
ide_object_destroyed (IdeObject **object_pointer)
{
if (object_pointer != NULL)
*object_pointer = NULL;
}
/* compat for now to ease porting */
void
ide_object_set_context (IdeObject *object,
IdeContext *context)
{
ide_object_append (IDE_OBJECT (context), object);
}
static gboolean dummy (gpointer p) { return G_SOURCE_REMOVE; }
/**
* ide_object_get_context:
* @object: a #IdeObject
*
* Gets the #IdeContext for the object.
*
* Returns: (transfer none) (nullable): an #IdeContext
*
* Since: 3.32
*/
IdeContext *
ide_object_get_context (IdeObject *object)
{
g_autoptr(IdeObject) root = ide_object_ref_root (object);
IdeContext *ret = NULL;
GSource *source;
if (IDE_IS_CONTEXT (root))
ret = IDE_CONTEXT (root);
/* We can just return a borrowed instance if in main thread,
* otherwise we need to queue the object to the main loop.
*/
if (IDE_IS_MAIN_THREAD ())
return ret;
source = g_idle_source_new ();
g_source_set_name (source, "context-release");
g_source_set_callback (source, dummy, g_steal_pointer (&root), g_object_unref);
g_source_attach (source, g_main_context_get_thread_default ());
g_source_unref (source);
return ret;
}
/**
* ide_object_ref_context:
* @self: a #IdeContext
*
* Gets the root #IdeContext for the object, if any.
*
* Returns: (transfer full) (nullable): an #IdeContext or %NULL
*
* Since: 3.32
*/
IdeContext *
ide_object_ref_context (IdeObject *self)
{
g_autoptr(IdeObject) root = NULL;
g_return_val_if_fail (IDE_IS_OBJECT (self), NULL);
if ((root = ide_object_ref_root (self)) && IDE_IS_CONTEXT (root))
return IDE_CONTEXT (g_steal_pointer (&root));
return NULL;
}
gboolean
ide_object_in_destruction (IdeObject *self)
{
IdeObjectPrivate *priv = ide_object_get_instance_private (self);
gboolean ret;
g_return_val_if_fail (IDE_IS_OBJECT (self), FALSE);
ide_object_lock (self);
ret = priv->in_destruction || priv->destroyed;
ide_object_unlock (self);
return ret;
}
/**
* ide_object_repr:
* @self: a #IdeObject
*
* This function is similar to Python's `repr()` which gives a string
* representation for the object. It is useful when debugging Builder
* or when writing plugins.
*
* Returns: (transfer full): a string containing the string representation
* of the #IdeObject
*
* Since: 3.32
*/
gchar *
ide_object_repr (IdeObject *self)
{
g_autofree gchar *str = NULL;
g_return_val_if_fail (IDE_IS_OBJECT (self), NULL);
str = IDE_OBJECT_GET_CLASS (self)->repr (self);
return g_strdup_printf ("<%s at %p>", str, self);
}
gboolean
ide_object_set_error_if_destroyed (IdeObject *self,
GError **error)
{
g_return_val_if_fail (IDE_IS_OBJECT (self), FALSE);
if (ide_object_in_destruction (self))
{
g_set_error (error,
G_IO_ERROR,
G_IO_ERROR_CANCELLED,
"The object was destroyed");
return TRUE;
}
return FALSE;
}
void
ide_object_log (gpointer instance,
GLogLevelFlags level,
const gchar *domain,
const gchar *format,
...)
{
g_autoptr(IdeObject) root = NULL;
va_list args;
g_assert (!instance || IDE_IS_OBJECT (instance));
if G_UNLIKELY (instance == NULL || !(root = ide_object_ref_root (instance)))
{
va_start (args, format);
g_logv (domain, level, format, args);
va_end (args);
}
if (IDE_IS_CONTEXT (root))
{
g_autofree gchar *message = NULL;
va_start (args, format);
message = g_strdup_vprintf (format, args);
ide_context_log (IDE_CONTEXT (root), level, domain, message);
va_end (args);
}
}
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