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278 lines
11 KiB
C
278 lines
11 KiB
C
/*
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* libInstPatch
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* Copyright (C) 1999-2014 Element Green <element@elementsofsound.org>
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Lesser General Public License
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* as published by the Free Software Foundation; version 2.1
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* of the License only.
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*
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* This library is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
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* 02110-1301, USA or on the web at http://www.gnu.org.
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*/
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#ifndef __IPATCH_ITEM_H__
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#define __IPATCH_ITEM_H__
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#include <stdarg.h>
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#include <glib.h>
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#include <glib-object.h>
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typedef struct _IpatchItem IpatchItem;
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typedef struct _IpatchItemClass IpatchItemClass;
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#include <libinstpatch/IpatchIter.h>
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#include <libinstpatch/IpatchList.h>
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#define IPATCH_TYPE_ITEM (ipatch_item_get_type ())
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#define IPATCH_ITEM(obj) \
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(G_TYPE_CHECK_INSTANCE_CAST ((obj), IPATCH_TYPE_ITEM, IpatchItem))
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#define IPATCH_ITEM_CLASS(klass) \
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(G_TYPE_CHECK_CLASS_CAST ((klass), IPATCH_TYPE_ITEM, IpatchItemClass))
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#define IPATCH_IS_ITEM(obj) \
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(G_TYPE_CHECK_INSTANCE_TYPE ((obj), IPATCH_TYPE_ITEM))
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#define IPATCH_IS_ITEM_CLASS(klass) \
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(G_TYPE_CHECK_CLASS_TYPE ((klass), IPATCH_TYPE_ITEM))
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#define IPATCH_ITEM_GET_CLASS(obj) \
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(G_TYPE_INSTANCE_GET_CLASS ((obj), IPATCH_TYPE_ITEM, IpatchItemClass))
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/**
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* IpatchItemCopyLinkFunc:
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* @item: Item which is being linked (contains a reference to @link).
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* @link: The item being referenced (can be NULL).
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* @user_data: User data supplied to copy/duplicate function.
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*
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* A callback function called during item copy/duplicate operations for
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* any item link reference which needs to be resolved. An example usage
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* is for deep duplicating an object (all references can also be duplicated).
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* Item copy methods should call this for any linked item references which are
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* not part of the new object.
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*
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* Returns: Pointer to item to use for link property (can be the @link item
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* if the duplicated/copied item is local to the same file).
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*/
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typedef IpatchItem *(*IpatchItemCopyLinkFunc)(IpatchItem *item,
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IpatchItem *link,
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gpointer user_data);
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/* Base patch item object */
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struct _IpatchItem
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{
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GObject object;
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/*< private >*/
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int flags; /* flag field (atomic int ops used) */
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IpatchItem *parent; /* parent item or NULL if not parented or root */
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IpatchItem *base; /* base parent object or NULL */
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GStaticRecMutex *mutex; /* pointer to mutex (could be a parent's mutex) */
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};
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/* Base patch item class */
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struct _IpatchItemClass
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{
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GObjectClass parent_class;
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/*< public >*/
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gboolean mutex_slave; /* set to TRUE to use parent thread mutex */
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/* methods */
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void (*item_set_property)(GObject *object, guint property_id,
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const GValue *value, GParamSpec *pspec);
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void (*copy)(IpatchItem *dest, IpatchItem *src,
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IpatchItemCopyLinkFunc link_func, gpointer user_data);
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void (*remove)(IpatchItem *item);
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/**
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* remove_full:
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* @item: Item to remove references to/from
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* @full: %TRUE removes all references to and from @item, %FALSE removes only references to @item
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*
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* Removes references to/from (depending on the value of @full) @item of other objects in the same
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* #IpatchBase object. The remove method can be used instead for default behavior of removing item's
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* children if it is a container and @full is TRUE.
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*
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* Since: 1.1.0
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*/
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void (*remove_full)(IpatchItem *item, gboolean full);
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};
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typedef enum
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{
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IPATCH_ITEM_HOOKS_ACTIVE = 1 << 0, /* hook callbacks active? */
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IPATCH_ITEM_FREE_MUTEX = 1 << 1 /* TRUE if item should free its mutex */
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} IpatchItemFlags;
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/**
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* IPATCH_ITEM_UNUSED_FLAG_SHIFT: (skip)
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*/
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/* 2 flags + reserve 2 bits for future expansion */
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#define IPATCH_ITEM_UNUSED_FLAG_SHIFT 4
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/* Multi-thread locking macros. For now there is no distinction between
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write and read locking since GStaticRWLock is not recursive. */
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#define IPATCH_ITEM_WLOCK(item) \
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g_static_rec_mutex_lock (((IpatchItem *)(item))->mutex)
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#define IPATCH_ITEM_WUNLOCK(item) \
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g_static_rec_mutex_unlock (((IpatchItem *)(item))->mutex)
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#define IPATCH_ITEM_RLOCK(item) IPATCH_ITEM_WLOCK(item)
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#define IPATCH_ITEM_RUNLOCK(item) IPATCH_ITEM_WUNLOCK(item)
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/**
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* IpatchItemPropNotify:
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* @item: Item whose property changed
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* @pspec: Parameter spec of property which changed
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* @new_value: New value assigned to the property
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* @old_value: Old value that the property had (can be %NULL for read only
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* properties)
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* @user_data: User defined pointer from when callback was added
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* @event_ptrs: Per event data defined by users of callback system
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*
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* Property notify information structure.
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*/
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typedef struct
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{
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IpatchItem *item; /* item whose property changed */
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GParamSpec *pspec; /* property spec of the property that changed */
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const GValue *new_value; /* new value of the property */
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const GValue *old_value; /* old value of the property (can be NULL!) */
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gpointer user_data; /* user defined data, defined on connect */
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/* per event data */
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struct
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{
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gpointer data; /* implementation defined data per event */
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GDestroyNotify destroy; /* function called to cleanup for @data */
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} eventdata[4];
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} IpatchItemPropNotify;
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/**
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* IPATCH_ITEM_PROP_NOTIFY_SET_EVENT:
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* @info: IpatchItemPropNotify pointer
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* @index: Pointer index (0-3)
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* @data: Data to assign to pointer field
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* @destroy: Callback function to cleanup @data when done (or %NULL)
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*
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* A macro for assigning per event pointers to #IpatchItemPropNotify.
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*/
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#define IPATCH_ITEM_PROP_NOTIFY_SET_EVENT(info, index, data, destroy) \
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(info)->eventdata[index].data = data; (info)->eventdata[index].destroy = destroy
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/**
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* IpatchItemPropCallback:
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*
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* IpatchItem property change callback function prototype.
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*/
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typedef void (*IpatchItemPropCallback)(IpatchItemPropNotify *notify);
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/**
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* IpatchItemPropDisconnect:
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* @item: Item of prop change match criteria
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* @pspec: Parameter spec of prop change match criteria
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* @user_data: User defined pointer from when callback was added
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*
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* Function prototype which gets called when a property notify callback gets
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* disconnected.
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*/
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typedef void (*IpatchItemPropDisconnect)(IpatchItem *item, GParamSpec *pspec,
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gpointer user_data);
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/* Convenience macro used by IpatchItem copy methods to call a copy link
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function, or use the link pointer directly if function is NULL */
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#define IPATCH_ITEM_COPY_LINK_FUNC(item, link, func, userdata) \
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(func ? func (item, link, userdata) : link)
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/* stored publicy for added convenience to derived types */
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/* Useful when libinstpatch library is used as a static library. */
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extern GParamSpec *ipatch_item_pspec_title;
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/*
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Getter function returning title property GParamSpec as a convenience to derived type.
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Useful when libinstpatch library is used as a shared library linked at load time.
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*/
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GParamSpec *ipatch_item_get_pspec_title(void);
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GType ipatch_item_get_type(void);
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int ipatch_item_get_flags(gpointer item);
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void ipatch_item_set_flags(gpointer item, int flags);
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void ipatch_item_clear_flags(gpointer item, int flags);
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void ipatch_item_set_parent(IpatchItem *item, IpatchItem *parent);
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void ipatch_item_unparent(IpatchItem *item);
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IpatchItem *ipatch_item_get_parent(IpatchItem *item);
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IpatchItem *ipatch_item_peek_parent(IpatchItem *item);
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IpatchItem *ipatch_item_get_base(IpatchItem *item);
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IpatchItem *ipatch_item_peek_base(IpatchItem *item);
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IpatchItem *ipatch_item_get_ancestor_by_type(IpatchItem *item,
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GType ancestor_type);
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IpatchItem *ipatch_item_peek_ancestor_by_type(IpatchItem *item,
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GType ancestor_type);
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void ipatch_item_remove(IpatchItem *item);
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void ipatch_item_remove_full(IpatchItem *item, gboolean full);
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void ipatch_item_remove_recursive(IpatchItem *item, gboolean full);
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void ipatch_item_changed(IpatchItem *item);
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void ipatch_item_get_property_fast(IpatchItem *item, GParamSpec *pspec,
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GValue *value);
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void ipatch_item_copy(IpatchItem *dest, IpatchItem *src);
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void ipatch_item_copy_link_func(IpatchItem *dest, IpatchItem *src,
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IpatchItemCopyLinkFunc link_func,
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gpointer user_data);
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void ipatch_item_copy_replace(IpatchItem *dest, IpatchItem *src,
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GHashTable *repl_hash);
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IpatchItem *ipatch_item_duplicate(IpatchItem *item);
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IpatchItem *ipatch_item_duplicate_link_func(IpatchItem *item,
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IpatchItemCopyLinkFunc link_func,
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gpointer user_data);
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IpatchItem *ipatch_item_duplicate_replace(IpatchItem *item,
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GHashTable *repl_hash);
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IpatchList *ipatch_item_duplicate_deep(IpatchItem *item);
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IpatchItem *ipatch_item_copy_link_func_deep(IpatchItem *item, IpatchItem *link,
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gpointer user_data);
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IpatchItem *ipatch_item_copy_link_func_hash(IpatchItem *item, IpatchItem *link,
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gpointer user_data);
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gboolean ipatch_item_type_can_conflict(GType item_type);
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GParamSpec **ipatch_item_type_get_unique_specs(GType item_type,
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guint32 *groups);
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GValueArray *ipatch_item_get_unique_props(IpatchItem *item);
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guint ipatch_item_test_conflict(IpatchItem *item1, IpatchItem *item2);
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void ipatch_item_set_atomic(gpointer item,
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const char *first_property_name, ...);
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void ipatch_item_get_atomic(gpointer item,
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const char *first_property_name, ...);
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IpatchItem *ipatch_item_first(IpatchIter *iter);
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IpatchItem *ipatch_item_next(IpatchIter *iter);
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/* in IpatchItemProp.c */
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void ipatch_item_prop_notify(IpatchItem *item, GParamSpec *pspec,
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const GValue *new_value, const GValue *old_value);
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void ipatch_item_prop_notify_by_name(IpatchItem *item, const char *prop_name,
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const GValue *new_value,
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const GValue *old_value);
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guint ipatch_item_prop_connect(IpatchItem *item, GParamSpec *pspec,
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IpatchItemPropCallback callback,
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IpatchItemPropDisconnect disconnect,
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gpointer user_data);
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guint ipatch_item_prop_connect_by_name(IpatchItem *item,
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const char *prop_name,
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IpatchItemPropCallback callback,
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IpatchItemPropDisconnect disconnect,
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gpointer user_data);
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void ipatch_item_prop_disconnect(guint handler_id);
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void ipatch_item_prop_disconnect_matched(IpatchItem *item,
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GParamSpec *pspec,
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IpatchItemPropCallback callback,
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gpointer user_data);
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void ipatch_item_prop_disconnect_by_name(IpatchItem *item,
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const char *prop_name,
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IpatchItemPropCallback callback,
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gpointer user_data);
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#endif
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