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#ifndef __CONTEXT_PROVIDER_H__
#define __CONTEXT_PROVIDER_H__
#include <glib.h>
#include <glib-object.h>
#include <gee/arraylist.h>
#include <stdlib.h>
#include <string.h>
#include <float.h>
#include <math.h>
#include <dbus/dbus-glib-lowlevel.h>
#include <dbus/dbus-glib.h>
#include <string_set.h>
#include <provider_interface.h>
G_BEGIN_DECLS
#define CONTEXT_PROVIDER_TYPE_CHANGE_SET (context_provider_change_set_get_type ())
#define CONTEXT_PROVIDER_CHANGE_SET(obj) (G_TYPE_CHECK_INSTANCE_CAST ((obj), CONTEXT_PROVIDER_TYPE_CHANGE_SET, ContextProviderChangeSet))
#define CONTEXT_PROVIDER_CHANGE_SET_CLASS(klass) (G_TYPE_CHECK_CLASS_CAST ((klass), CONTEXT_PROVIDER_TYPE_CHANGE_SET, ContextProviderChangeSetClass))
#define CONTEXT_PROVIDER_IS_CHANGE_SET(obj) (G_TYPE_CHECK_INSTANCE_TYPE ((obj), CONTEXT_PROVIDER_TYPE_CHANGE_SET))
#define CONTEXT_PROVIDER_IS_CHANGE_SET_CLASS(klass) (G_TYPE_CHECK_CLASS_TYPE ((klass), CONTEXT_PROVIDER_TYPE_CHANGE_SET))
#define CONTEXT_PROVIDER_CHANGE_SET_GET_CLASS(obj) (G_TYPE_INSTANCE_GET_CLASS ((obj), CONTEXT_PROVIDER_TYPE_CHANGE_SET, ContextProviderChangeSetClass))
typedef struct _ContextProviderChangeSet ContextProviderChangeSet;
typedef struct _ContextProviderChangeSetClass ContextProviderChangeSetClass;
typedef struct _ContextProviderChangeSetPrivate ContextProviderChangeSetPrivate;
typedef struct _ContextProviderParamSpecChangeSet ContextProviderParamSpecChangeSet;
/**
* ContextProviderGetCallback:
* @keys: a #ContextProviderStringSet of keys for which values have been requested
* @change_set: a #ContextProvideChangeSet in which to fill in the requested values
* @user_data: the user data passed in #context_provider_install
*
* Type definition for a function that will be called back when key values are needed.
* The keys will only ever be keys that this provider registered as providing.
*/
typedef void (*ContextProviderGetCallback) (ContextProviderStringSet* keys, ContextProviderChangeSet* change_set, void* user_data);
/**
* ContextProviderSubscribedCallback:
* @keys_subscribed: a #ContextProviderStringSet of keys which have been newly subscibed
* @user_data: the user data passed in #context_provider_install
*
* Type definition for a function that will be called back when a key is first subscribed to
* The keys will only ever be keys that this provider registered as providing.
*/
typedef void (*ContextProviderSubscribedCallback) (ContextProviderStringSet* keys_subscribed, void* user_data);
/**
* ContextProviderUnsubscribedCallback:
* @keys_unsubscribed: a #ContextProviderStringSet of keys that have been newly unsubscribed
* @keys_remaining: a #ContextProviderStringSet of keys provided by this provider that are still
* subscribed to
* @user_data: the user data passed in #context_provider_install
*
* Type definition for a function that will be called back when a key is last unsubscribed from.
* The keys will only ever be keys that this provider registered as providing.
*/
typedef void (*ContextProviderUnsubscribedCallback) (ContextProviderStringSet* keys_unsubscribed, ContextProviderStringSet* keys_remaining, void* user_data);
/**
* SECTION:change_set
* @short_description: Context value change handling
* @include: context_provider.h
* @see_also: #ContextProviderGetCallback
*
* #ContextProviderChangeSet is used to signal changes to contextual values by a provider.
* As a provider you can asynchronously emit value changes for keys which you are providing
* by creating a #ContextProviderChangeSet and commiting it using #context_provider_change_set_commit.
* #ContextProviderChangeSet can also be provided to you, for example in
* #ContextProviderGetCallback. In this case, you should simply add the values requested
* and return without calling #context_provider_change_set_commit.
*/
struct _ContextProviderChangeSet {
GTypeInstance parent_instance;
volatile int ref_count;
ContextProviderChangeSetPrivate * priv;
GeeArrayList* undeterminable_keys;
};
struct _ContextProviderChangeSetClass {
GTypeClass parent_class;
void (*finalize) (ContextProviderChangeSet *self);
};
struct _ContextProviderParamSpecChangeSet {
GParamSpec parent_instance;
};
extern gboolean context_provider_initialised;
ContextProviderChangeSet* context_provider_change_set_create (void);
gboolean context_provider_change_set_commit (ContextProviderChangeSet* change_set);
void context_provider_change_set_cancel (ContextProviderChangeSet* change_set);
ContextProviderChangeSet* context_provider_change_set_construct_from_get (GType object_type, GHashTable* properties, GeeArrayList* undeterminable_keys);
ContextProviderChangeSet* context_provider_change_set_new_from_get (GHashTable* properties, GeeArrayList* undeterminable_keys);
void context_provider_change_set_add_integer (ContextProviderChangeSet* self, const char* key, gint value);
void context_provider_change_set_add_double (ContextProviderChangeSet* self, const char* key, double value);
void context_provider_change_set_add_boolean (ContextProviderChangeSet* self, const char* key, gboolean value);
void context_provider_change_set_add_undetermined_key (ContextProviderChangeSet* self, const char* key);
GParamSpec* context_provider_param_spec_change_set (const gchar* name, const gchar* nick, const gchar* blurb, GType object_type, GParamFlags flags);
gpointer context_provider_value_get_change_set (const GValue* value);
void context_provider_value_set_change_set (GValue* value, gpointer v_object);
GType context_provider_change_set_get_type (void);
gpointer context_provider_change_set_ref (gpointer instance);
void context_provider_change_set_unref (gpointer instance);
gboolean context_provider_init (DBusBusType bus_type, const char* bus_name);
ContextProviderProvider* context_provider_install (char** provided_keys, ContextProviderGetCallback get_cb, void* get_cb_target, ContextProviderSubscribedCallback subscribed_cb, void* subscribed_cb_target, ContextProviderUnsubscribedCallback unsubscribed_cb, void* unsubscribed_cb_target);
void context_provider_remove (ContextProviderProvider* provider);
gint context_provider_no_of_subscribers (const char* key);
G_END_DECLS
#endif
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