TpChannelManager: telepathy-glib API Reference Manual

TpChannelManager

TpChannelManager — interface for creating and tracking channels

Functions

void	(*TpChannelManagerChannelClassFunc) ()
void	(*TpChannelManagerForeachChannelClassFunc) ()
void	(*TpChannelManagerTypeChannelClassFunc) ()
void	(*TpChannelManagerTypeForeachChannelClassFunc) ()
void	(*TpChannelManagerForeachChannelFunc) ()
gboolean	(*TpChannelManagerRequestFunc) ()
gboolean	tp_channel_manager_asv_has_unknown_properties ()
gboolean	tp_channel_manager_create_channel ()
void	tp_channel_manager_emit_channel_closed ()
void	tp_channel_manager_emit_channel_closed_for_object ()
void	tp_channel_manager_emit_new_channel ()
void	tp_channel_manager_emit_new_channels ()
void	tp_channel_manager_emit_request_already_satisfied ()
void	tp_channel_manager_emit_request_failed ()
void	tp_channel_manager_emit_request_failed_printf ()
gboolean	tp_channel_manager_ensure_channel ()
void	tp_channel_manager_foreach_channel ()
void	tp_channel_manager_foreach_channel_class ()
void	tp_channel_manager_type_foreach_channel_class ()
gboolean	tp_channel_manager_request_channel ()

Signals

void	channel-closed	Has Details
void	new-channels	Has Details
void	request-already-satisfied	Has Details
void	request-failed	Has Details

Types and Values

	TpChannelManager
struct	TpChannelManagerIface

Object Hierarchy

    GInterface
    ╰── TpChannelManager

Known Implementations

TpChannelManager is implemented by TpBaseContactList and TpSimplePasswordManager.

Includes

#include <telepathy-glib/telepathy-glib.h>

Description

A channel manager is attached to a connection. It carries out channel requests from the connection, and responds to channel-related events on the underlying network connection, for particular classes of channel (for example, incoming and outgoing calls, respectively). It also tracks currently-open channels of the relevant kinds.

The connection has an array of channel managers. In response to a call to CreateChannel or RequestChannel, the channel request is offered to each channel manager in turn, until one accepts the request. In a trivial implementation there might be a single channel manager which handles all requests and all incoming events, but in general, there will be multiple channel managers handling different types of channel.

For example, at the time of writing, Gabble has a roster channel manager which handles contact lists and groups, an IM channel manager which handles one-to-one messaging, a MUC channel manager which handles multi-user chat rooms, the index of chat rooms and MUC tubes, a media channel manager which handles VoIP calls, and a 1-1 tubes channel manager.

Functions

TpChannelManagerChannelClassFunc ()

void
(*TpChannelManagerChannelClassFunc) (TpChannelManager *manager,
                                     GHashTable *fixed_properties,
                                     const gchar * const *allowed_properties,
                                     gpointer user_data);

Signature of callbacks which act on each channel class supported by manager .

Parameters

manager	An object implementing TpChannelManager
fixed_properties	A table mapping (const gchar *) property names to GValues, representing the values those properties must take to request channels of a particular class.
allowed_properties	A `NULL`-terminated array of property names which may appear in requests for a particular channel class.
user_data	Arbitrary user-supplied data.

TpChannelManagerForeachChannelClassFunc ()

void
(*TpChannelManagerForeachChannelClassFunc)
                               (TpChannelManager *manager,
                                TpChannelManagerChannelClassFunc func,
                                gpointer user_data);

Signature of an implementation of foreach_channel_class, which must call func(manager, fixed, allowed, user_data) for each channel class understood by manager .

Parameters

manager	An object implementing TpChannelManager
func	A function
user_data	Arbitrary data to be passed as the final argument of `func`

TpChannelManagerTypeChannelClassFunc ()

void
(*TpChannelManagerTypeChannelClassFunc)
                               (GType type,
                                GHashTable *fixed_properties,
                                const gchar * const *allowed_properties,
                                gpointer user_data);

Signature of callbacks which act on each channel class potentially supported by instances of type .

Parameters

type	A type whose instances implement TpChannelManager
fixed_properties	A table mapping (const gchar *) property names to GValues, representing the values those properties must take to request channels of a particular class.
allowed_properties	A `NULL`-terminated array of property names which may appear in requests for a particular channel class.
user_data	Arbitrary user-supplied data.

TpChannelManagerTypeForeachChannelClassFunc ()

void
(*TpChannelManagerTypeForeachChannelClassFunc)
                               (GType type,
                                TpChannelManagerTypeChannelClassFunc func,
                                gpointer user_data);

Signature of an implementation of type_foreach_channel_class, which must call func(type, fixed, allowed, user_data) for each channel class potentially understood by instances of type .

Parameters

type	A type whose instances implement TpChannelManager
func	A function
user_data	Arbitrary data to be passed as the final argument of `func`

TpChannelManagerForeachChannelFunc ()

void
(*TpChannelManagerForeachChannelFunc) (TpChannelManager *manager,
                                       TpExportableChannelFunc func,
                                       gpointer user_data);

Signature of an implementation of foreach_channel, which must call func(channel, user_data) for each channel managed by this channel manager.

Parameters

manager	an object implementing TpChannelManager
func	A function
user_data	Arbitrary data to be passed as the second argument of `func`

TpChannelManagerRequestFunc ()

gboolean
(*TpChannelManagerRequestFunc) (TpChannelManager *manager,
                                gpointer request_token,
                                GHashTable *request_properties);

Signature of an implementation of TpChannelManagerIface.create_channel and TpChannelManagerIface.request_channel.

Implementations should inspect the contents of request_properties to see if it matches a channel class handled by this manager. If so, they should return TRUE to accept responsibility for the request, and ultimately emit exactly one of the “new-channels”, “request-already-satisfied” and “request-failed” signals (including request_token in the appropriate argument).

If the implementation does not want to handle the request, it should return FALSE to allow the request to be offered to another channel manager.

Implementations may assume the following of request_properties :

the ChannelType property is present, and is a (const gchar *)
the TargetHandleType property is a valid TpHandleType, if present
if TargetHandleType is None, TargetHandle is omitted
if TargetHandleType is not None, TargetHandle is a valid TpHandle of that TpHandleType

Changed in version 0.15.5: Previously the TargetID property was guaranteed to be missing from request_properties . Now it is always present, whether it was in the original channel request or not.

Parameters

manager	An object implementing TpChannelManager
request_token	An opaque pointer representing this pending request.
request_properties	A table mapping (const gchar *) property names to GValue, representing the desired properties of a channel requested by a Telepathy client. The hash table will be freed after the function returns; if the channel manager wants to keep it around, it must copy it.

Returns

TRUE if manager will handle this request, else FALSE.

tp_channel_manager_asv_has_unknown_properties ()

gboolean
tp_channel_manager_asv_has_unknown_properties
                               (GHashTable *properties,
                                const gchar * const *fixed,
                                const gchar * const *allowed,
                                GError **error);

Checks whether the keys of properties are elements of one of fixed and allowed . This is intended to be used by implementations of TpChannelManagerIface.create_channel which have decided to accept a request, to conform with the specification's requirement that unknown requested properties must cause a request to fail, not be silently ignored.

On encountering unknown properties, this function will return TRUE, and set error to a GError that could be used as a D-Bus method error.

Parameters

properties	a table mapping (const gchar *) property names to GValues, as passed to methods of TpChannelManager
fixed	a `NULL`-terminated array of property names
allowed	a `NULL`-terminated array of property names
error	an address at which to store an error suitable for returning from the D-Bus method when `properties` contains unknown properties

Returns

TRUE if properties contains keys not in either fixed or allowed ; else FALSE.

Since: 0.7.15

tp_channel_manager_create_channel ()

gboolean
tp_channel_manager_create_channel (TpChannelManager *manager,
                                   gpointer request_token,
                                   GHashTable *request_properties);

Offers an incoming CreateChannel call to manager .

Parameters

manager	An object implementing TpChannelManager
request_token	An opaque pointer representing this pending request.
request_properties	A table mapping (const gchar *) property names to GValue, representing the desired properties of a channel requested by a Telepathy client.

Returns

TRUE if this request will be handled by manager ; else FALSE.

Since: 0.7.15

tp_channel_manager_emit_channel_closed ()

void
tp_channel_manager_emit_channel_closed
                               (gpointer instance,
                                const gchar *path);

Emit the “channel-closed” signal indicating that the channel at the given object path has been closed.

Parameters

instance	An object implementing TpChannelManager
path	A channel's object-path

Since: 0.7.15

tp_channel_manager_emit_channel_closed_for_object ()

void
tp_channel_manager_emit_channel_closed_for_object
                               (gpointer instance,
                                TpExportableChannel *channel);

Emit the “channel-closed” signal indicating that the given channel has been closed. (This is a convenient shortcut for calling tp_channel_manager_emit_channel_closed() with the “object-path” property of channel .)

Parameters

instance	An object implementing TpChannelManager
channel	A TpExportableChannel

Since: 0.7.15

tp_channel_manager_emit_new_channel ()

void
tp_channel_manager_emit_new_channel (gpointer instance,
                                     TpExportableChannel *channel,
                                     GSList *request_tokens);

Emit the “new-channels” signal indicating that the channel has been created.

Parameters

instance	An object implementing TpChannelManager
channel	A TpExportableChannel
request_tokens	the request tokens (opaque pointers) satisfied by this channel

Since: 0.7.15

tp_channel_manager_emit_new_channels ()

void
tp_channel_manager_emit_new_channels (gpointer instance,
                                      GHashTable *channels);

tp_channel_manager_emit_new_channels is deprecated and should not be used in newly-written code.

in 0.19.1 this function should not be used. Signalling the creation of multiple channels together in a single signal is strongly recommended against as it's very complicated, hard to get right in clients, and not nearly as useful as it originally sounded. Use tp_channel_manager_emit_new_channel() instead.

If channels is non-empty, emit the “new-channels” signal indicating that those channels have been created.

Parameters

instance	An object implementing TpChannelManager
channels	a GHashTable where the keys are TpExportableChannel instances (hashed and compared by `g_direct_hash()` and `g_direct_equal()`) and the values are linked lists (GSList) of request tokens (opaque pointers) satisfied by these channels

Since: 0.7.15

tp_channel_manager_emit_request_already_satisfied ()

void
tp_channel_manager_emit_request_already_satisfied
                               (gpointer instance,
                                gpointer request_token,
                                TpExportableChannel *channel);

Emit the “request-already-satisfied” signal indicating that the pre-existing channel channel satisfies request_token .

Parameters

instance	An object implementing TpChannelManager
request_token	An opaque pointer representing the request that succeeded
channel	The channel that satisfies the request

Since: 0.7.15

tp_channel_manager_emit_request_failed ()

void
tp_channel_manager_emit_request_failed
                               (gpointer instance,
                                gpointer request_token,
                                GQuark domain,
                                gint code,
                                const gchar *message);

Emit the “request-failed” signal indicating that the request request_token failed for the given reason.

Parameters

instance	An object implementing TpChannelManager
request_token	An opaque pointer representing the request that failed
domain	a GError domain
code	a GError code appropriate for `domain`
message	the error message

Since: 0.7.15

tp_channel_manager_emit_request_failed_printf ()

void
tp_channel_manager_emit_request_failed_printf
                               (gpointer instance,
                                gpointer request_token,
                                GQuark domain,
                                gint code,
                                const gchar *format,
                                ...);

Emit the “request-failed” signal indicating that the request request_token failed for the given reason.

Parameters

instance	An object implementing TpChannelManager
request_token	An opaque pointer representing the request that failed
domain	a GError domain
code	a GError code appropriate for `domain`
format	a printf-style format string for the error message
...	arguments for the format string

Since: 0.7.15

tp_channel_manager_ensure_channel ()

gboolean
tp_channel_manager_ensure_channel (TpChannelManager *manager,
                                   gpointer request_token,
                                   GHashTable *request_properties);

Offers an incoming EnsureChannel call to manager .

Parameters

manager	An object implementing TpChannelManager
request_token	An opaque pointer representing this pending request.
request_properties	A table mapping (const gchar *) property names to GValue, representing the desired properties of a channel requested by a Telepathy client.

Returns

TRUE if this request will be handled by manager ; else FALSE.

Since: 0.7.16

tp_channel_manager_foreach_channel ()

void
tp_channel_manager_foreach_channel (TpChannelManager *manager,
                                    TpExportableChannelFunc func,
                                    gpointer user_data);

Calls func(channel, user_data) for each channel managed by manager .

Parameters

manager	an object implementing TpChannelManager
func	A function
user_data	Arbitrary data to be passed as the second argument of `func`

Since: 0.7.15

tp_channel_manager_foreach_channel_class ()

void
tp_channel_manager_foreach_channel_class
                               (TpChannelManager *manager,
                                TpChannelManagerChannelClassFunc func,
                                gpointer user_data);

Calls func(manager, fixed, allowed, user_data) for each channel class understood by manager .

Parameters

manager	An object implementing TpChannelManager
func	A function
user_data	Arbitrary data to be passed as the final argument of `func`

Since: 0.7.15

tp_channel_manager_type_foreach_channel_class ()

void
tp_channel_manager_type_foreach_channel_class
                               (GType type,
                                TpChannelManagerTypeChannelClassFunc func,
                                gpointer user_data);

Calls func(type, fixed, allowed, user_data) for each channel class potentially understood by instances of type .

Parameters

type	A type whose instances implement TpChannelManager
func	A function
user_data	Arbitrary data to be passed as the final argument of `func`

Since: 0.11.11

tp_channel_manager_request_channel ()

gboolean
tp_channel_manager_request_channel (TpChannelManager *manager,
                                    gpointer request_token,
                                    GHashTable *request_properties);

Offers an incoming RequestChannel call to manager .

Parameters

manager	An object implementing TpChannelManager
request_token	An opaque pointer representing this pending request.
request_properties	A table mapping (const gchar *) property names to GValue, representing the desired properties of a channel requested by a Telepathy client.

Returns

TRUE if this request will be handled by manager ; else FALSE.

Since: 0.7.15

Types and Values

TpChannelManager

typedef struct _TpChannelManager TpChannelManager;

Opaque typedef representing any channel manager implementation.

struct TpChannelManagerIface

struct TpChannelManagerIface {
    GTypeInterface parent;

    TpChannelManagerForeachChannelFunc foreach_channel;

    TpChannelManagerForeachChannelClassFunc foreach_channel_class;

    TpChannelManagerRequestFunc create_channel;
    TpChannelManagerRequestFunc request_channel;
    TpChannelManagerRequestFunc ensure_channel;

    TpChannelManagerTypeForeachChannelClassFunc type_foreach_channel_class;
};

The vtable for a channel manager implementation.

In addition to the fields documented here there are several GCallback fields which must currently be NULL.

Members

GTypeInterface `parent`;	Fields shared with GTypeInterface.
TpChannelManagerForeachChannelFunc `foreach_channel`;	Call func(channel, user_data) for each channel managed by this manager. If not implemented, the manager is assumed to manage no channels.
TpChannelManagerForeachChannelClassFunc `foreach_channel_class`;	Call func(manager, fixed, allowed, user_data) for each class of channel that this instance can create (a subset of the channel classes produced by `type_foreach_channel_class` ). If not implemented, `type_foreach_channel_class` is used.
TpChannelManagerRequestFunc `create_channel`;	Respond to a request for a new channel made with the Connection.Interface.Requests.CreateChannel method. See TpChannelManagerRequestFunc for details.
TpChannelManagerRequestFunc `request_channel`;	Respond to a request for a (new or existing) channel made with the Connection.RequestChannel method. See TpChannelManagerRequestFunc for details.
TpChannelManagerRequestFunc `ensure_channel`;	Respond to a request for a (new or existing) channel made with the Connection.Interface.Requests.EnsureChannel method. See TpChannelManagerRequestFunc for details. Since: 0.7.16
TpChannelManagerTypeForeachChannelClassFunc `type_foreach_channel_class`;	Call func(cls, fixed, allowed, user_data) for each class of channel that instances of this class might be able to create. Since: 0.11.11

Since: 0.7.15

Signal Details

The `“channel-closed”` signal

void
user_function (TpChannelManager *self,
               gchar            *path,
               gpointer          user_data)

Emitted when a channel has been closed. The Connection should generally respond to this signal by emitting ChannelClosed.

Parameters

self	the channel manager
path	the channel's object-path
user_data	user data set when the signal handler was connected.

Flags: Has Details

The `“new-channels”` signal

void
user_function (TpChannelManager *self,
               gpointer          channels,
               gpointer          user_data)

Emitted when new channels have been created. The Connection should generally emit NewChannels (and NewChannel) in response to this signal, and then return from pending CreateChannel, EnsureChannel and/or RequestChannel calls if appropriate.

Since 0.19.1, clients should not emit more than one channel in this signal at one time as the creation of multiple channels together in a single signal is strongly recommended against: it's very complicated, hard to get right in clients, and not nearly as useful as it originally sounded.

Parameters

self	the channel manager
channels	a GHashTable where the keys are TpExportableChannel instances (hashed and compared by `g_direct_hash()` and `g_direct_equal()`) and the values are linked lists (GSList) of request tokens (opaque pointers) satisfied by these channels
user_data	user data set when the signal handler was connected.

Flags: Has Details

The `“request-already-satisfied”` signal

void
user_function (TpChannelManager *self,
               gpointer          request_token,
               GObject          *channel,
               gpointer          user_data)

Emitted when a channel request is satisfied by an existing channel. The Connection should generally respond to this signal by returning success from EnsureChannel or RequestChannel.

Parameters

self	the channel manager
request_token	opaque pointer supplied by the requester, representing a request
channel	the existing TpExportableChannel that satisfies the request
user_data	user data set when the signal handler was connected.

Flags: Has Details

The `“request-failed”` signal

void
user_function (TpChannelManager *self,
               gpointer          request_token,
               guint             domain,
               gint              code,
               gchar            *message,
               gpointer          user_data)

Emitted when a channel request has failed. The Connection should generally respond to this signal by returning failure from CreateChannel, EnsureChannel or RequestChannel.

Parameters

self	the channel manager
request_token	opaque pointer supplied by the requester, representing a request
domain	the domain of a GError indicating why the request failed
code	the error code of a GError indicating why the request failed
message	the string part of a GError indicating why the request failed
user_data	user data set when the signal handler was connected.

Flags: Has Details

TpChannelManager

Functions

Signals

Types and Values

Object Hierarchy

Known Implementations

Includes

Description

Functions

TpChannelManagerChannelClassFunc ()

Parameters

TpChannelManagerForeachChannelClassFunc ()

Parameters

TpChannelManagerTypeChannelClassFunc ()

Parameters

TpChannelManagerTypeForeachChannelClassFunc ()

Parameters

TpChannelManagerForeachChannelFunc ()

Parameters

TpChannelManagerRequestFunc ()

Parameters

Returns

tp_channel_manager_asv_has_unknown_properties ()

Parameters

Returns

tp_channel_manager_create_channel ()

Parameters

Returns

tp_channel_manager_emit_channel_closed ()

Parameters

tp_channel_manager_emit_channel_closed_for_object ()

Parameters

tp_channel_manager_emit_new_channel ()

Parameters

tp_channel_manager_emit_new_channels ()

Parameters

tp_channel_manager_emit_request_already_satisfied ()

Parameters

tp_channel_manager_emit_request_failed ()

Parameters

tp_channel_manager_emit_request_failed_printf ()

Parameters

tp_channel_manager_ensure_channel ()

Parameters

Returns

tp_channel_manager_foreach_channel ()

Parameters

tp_channel_manager_foreach_channel_class ()

Parameters

tp_channel_manager_type_foreach_channel_class ()

Parameters

tp_channel_manager_request_channel ()

Parameters

Returns

Types and Values

TpChannelManager

struct TpChannelManagerIface

Members

Signal Details

The “channel-closed” signal

Parameters

The “new-channels” signal

Parameters

The “request-already-satisfied” signal

Parameters

The “request-failed” signal

Parameters

See Also

The `“channel-closed”` signal

The `“new-channels”` signal

The `“request-already-satisfied”` signal

The `“request-failed”` signal