TpChannel

typedef struct _TpChannel TpChannel;

A proxy object for a Telepathy channel.

(Changed in 0.7.12: the layout of the structure is visible, allowing subclassing.)

Since 0.7.1

TpChannelClass

typedef struct {
    TpProxyClass parent_class;
} TpChannelClass;

The class of a TpChannel. In addition to parent_class there are four pointers reserved for possible future use.

(Changed in 0.7.12: the layout of the structure is visible, allowing subclassing.)

Since 0.7.1

tp_channel_new ()

TpChannel *         tp_channel_new                      (TpConnection *conn,
                                                         const gchar *object_path,
                                                         const gchar *optional_channel_type,
                                                         TpHandleType optional_handle_type,
                                                         TpHandle optional_handle,
                                                         GError **error);

Since 0.7.1

tp_channel_new_from_properties ()

TpChannel *         tp_channel_new_from_properties      (TpConnection *conn,
                                                         const gchar *object_path,
                                                         const GHashTable *immutable_properties,
                                                         GError **error);

Since 0.7.19

tp_channel_run_until_ready ()

gboolean            tp_channel_run_until_ready          (TpChannel *self,
                                                         GError **error,
                                                         GMainLoop **loop);

If self is ready for use (introspection has finished, etc.), return immediately. Otherwise, re-enter the main loop until the channel either becomes invalid or becomes ready for use, or until the main loop stored via loop is cancelled.

Since 0.7.1

TpChannelWhenReadyCb ()

void                (*TpChannelWhenReadyCb)             (TpChannel *channel,
                                                         const GError *error,
                                                         gpointer user_data);

Signature of a callback passed to tp_channel_call_when_ready(), which will be called exactly once, when the channel becomes ready or invalid (whichever happens first)

tp_channel_call_when_ready ()

void                tp_channel_call_when_ready          (TpChannel *self,
                                                         TpChannelWhenReadyCb callback,
                                                         gpointer user_data);

If self is ready for use or has been invalidated, call callback immediately, then return. Otherwise, arrange for callback to be called when self either becomes ready for use or becomes invalid.

Since 0.7.7

tp_channel_init_known_interfaces ()

void                tp_channel_init_known_interfaces    (void);

Ensure that the known interfaces for TpChannel have been set up. This is done automatically when necessary, but for correct overriding of library interfaces by local extensions, you should call this function before calling tp_proxy_or_subclass_hook_on_interface_add() with first argument TP_TYPE_CHANNEL.

Since 0.7.6

tp_channel_borrow_connection ()

TpConnection *      tp_channel_borrow_connection        (TpChannel *self);

Returns the connection for this channel. The returned pointer is only valid while this channel is valid - reference it with g_object_ref() if needed.

Since 0.7.12

tp_channel_borrow_immutable_properties ()

GHashTable *        tp_channel_borrow_immutable_properties
                                                        (TpChannel *self);

Returns the immutable D-Bus properties of this channel, the same as "channel-properties".

The returned hash table should not be altered, and is not necessarily valid after the main loop is next re-entered. Copy it with g_boxed_copy() (its type is TP_HASH_TYPE_QUALIFIED_PROPERTY_VALUE_MAP) if a copy that remains valid must be kept.

If the "channel-properties" property was not set during construction (e.g. by calling tp_channel_new_from_properties()), a reasonable but possibly incomplete version will be made up from the values of individual properties; reading this property repeatedly may yield progressively more complete values until "channel-ready" becomes TRUE.

tp_channel_get_channel_type ()

const gchar *       tp_channel_get_channel_type         (TpChannel *self);

Get the D-Bus interface name representing this channel's type, if it has been discovered.

This is the same as the "channel-type" property.

Since 0.7.12

tp_channel_get_channel_type_id ()

GQuark              tp_channel_get_channel_type_id      (TpChannel *self);

Get the D-Bus interface name representing this channel's type, as a GQuark, if it has been discovered.

This is the same as the "channel-type" property, except that it is a GQuark rather than a string.

Since 0.7.12

tp_channel_get_handle ()

TpHandle            tp_channel_get_handle               (TpChannel *self,
                                                         TpHandleType *handle_type);

Get the handle representing the contact, chatroom, etc. with which this channel communicates for its whole lifetime, or 0 if there is no such handle or it has not yet been discovered.

This is the same as the "handle" property.

If handle_type is not NULL, the type of handle is written into it. This will be TP_UNKNOWN_HANDLE_TYPE if the handle has not yet been discovered, or TP_HANDLE_TYPE_NONE if there is no handle with which this channel will always communicate. This is the same as the "handle-type" property.

Since 0.7.12

tp_channel_get_identifier ()

const gchar *       tp_channel_get_identifier           (TpChannel *self);

This channel's associated identifier, or NULL if no identifier or unknown.

The identifier is the result of inspecting "handle". This is the same as the "identifier" property.

Since 0.7.21

tp_channel_is_ready ()

gboolean            tp_channel_is_ready                 (TpChannel *self);

Returns the same thing as the "channel-ready" property.

Since 0.7.12

tp_channel_group_get_flags ()

TpChannelGroupFlags  tp_channel_group_get_flags         (TpChannel *self);

Return the "group-flags" property (see the description of that property for notes on validity).

Since 0.7.12

tp_channel_group_get_handle_owner ()

TpHandle            tp_channel_group_get_handle_owner   (TpChannel *self,
                                                         TpHandle handle);

Synopsis (see below for further explanation):

- if self is not a group or handle is not a member of this channel, result is undefined; - if self does not have "ready" = TRUE, result is undefined; - if self does not have flags that include TP_CHANNEL_FLAG_PROPERTIES, result is undefined; - if handle is channel-specific and its globally valid "owner" is known, return that owner; - if handle is channel-specific and its globally valid "owner" is unknown, return zero; - if handle is globally valid, return handle itself

Some channels (those with flags that include TP_CHANNEL_FLAG_CHANNEL_SPECIFIC_HANDLES) have a concept of "channel-specific handles". These are handles that only have meaning within the context of the channel - for instance, in XMPP Multi-User Chat, participants in a chatroom are identified by an in-room JID consisting of the JID of the chatroom plus a local nickname.

Depending on the protocol and configuration, it might be possible to find out what globally valid handle (i.e. an identifier that you could add to your contact list) "owns" a channel-specific handle. For instance, in most XMPP MUC chatrooms, normal users cannot see what global JID corresponds to an in-room JID, but moderators can.

This is further complicated by the fact that channels with channel-specific handles can sometimes have members with globally valid handles (for instance, if you invite someone to an XMPP MUC using their globally valid JID, you would expect to see the handle representing that JID in the Group's remote-pending set).

This function's result is undefined unless the channel is ready and its flags include TP_CHANNEL_FLAG_PROPERTIES (an implementation without extra D-Bus round trips is not possible using the older API).

Since 0.7.12

tp_channel_group_get_self_handle ()

TpHandle            tp_channel_group_get_self_handle    (TpChannel *self);

Return the "group-self-handle" property (see the description of that property for notes on validity).

Since 0.7.12

tp_channel_group_get_local_pending ()

const TpIntSet *    tp_channel_group_get_local_pending  (TpChannel *self);

If self is ready and is a group, return a TpIntSet containing its local-pending members.

If self is a group but is not ready, the result may either be a set of local-pending members, or NULL.

If self is not a group, return NULL.

Since 0.7.12

tp_channel_group_get_members ()

const TpIntSet *    tp_channel_group_get_members        (TpChannel *self);

If self is ready and is a group, return a TpIntSet containing its members.

If self is a group but is not ready, the result may either be a set of members, or NULL.

If self is not a group, return NULL.

Since 0.7.12

tp_channel_group_get_remote_pending ()

const TpIntSet *    tp_channel_group_get_remote_pending (TpChannel *self);

If self is ready and is a group, return a TpIntSet containing its remote-pending members.

If self is a group but is not ready, the result may either be a set of remote-pending members, or NULL.

If self is not a group, return NULL.

Since 0.7.12

tp_channel_group_get_local_pending_info ()

gboolean            tp_channel_group_get_local_pending_info
                                                        (TpChannel *self,
                                                         TpHandle local_pending,
                                                         TpHandle *actor,
                                                         TpChannelGroupChangeReason *reason,
                                                         const gchar **message);

If local_pending is actually the handle of a local-pending contact, write additional information into actor, reason and message and return TRUE. The handle and message are not referenced or copied, and can only be assumed to remain valid until the main loop is re-entered.

If local_pending is not the handle of a local-pending contact, write 0 into actor, TP_CHANNEL_GROUP_CHANGE_REASON_NONE into reason and "" into message, and return FALSE.

Since 0.7.12

TP_ERRORS_REMOVED_FROM_GROUP

#define TP_ERRORS_REMOVED_FROM_GROUP (tp_errors_removed_from_group_quark ())

GError domain representing the local user being removed from a channel with the Group interface. The code in a GError with this domain must be a member of TpChannelGroupChangeReason.

This error may be raised on non-Group channels with certain reason codes if there's no better error code to use (mainly TP_CHANNEL_GROUP_CHANGE_REASON_NONE).

This macro expands to a function call returning a GQuark.

Since 0.7.1

tp_cli_channel_call_close ()

TpProxyPendingCall * tp_cli_channel_call_close          (TpChannel *proxy,
                                                         gint timeout_ms,
                                                         tp_cli_channel_callback_for_close callback,
                                                         gpointer user_data,
                                                         GDestroyNotify destroy,
                                                         GObject *weak_object);

Start a Close method call.

Request that the channel be closed. This is not the case until the <tp:member-ref>Closed</tp:member-ref> signal has been emitted, and depending on the connection manager this may simply remove you from the channel on the server, rather than causing it to stop existing entirely. Some channels such as contact list channels may not be closed.

tp_cli_channel_call_get_channel_type ()

TpProxyPendingCall * tp_cli_channel_call_get_channel_type
                                                        (TpChannel *proxy,
                                                         gint timeout_ms,
                                                         tp_cli_channel_callback_for_get_channel_type callback,
                                                         gpointer user_data,
                                                         GDestroyNotify destroy,
                                                         GObject *weak_object);

Start a GetChannelType method call.

Returns the interface name for the type of this channel. Clients SHOULD use the <tp:member-ref>ChannelType</tp:member-ref> property instead, falling back to this method only if necessary. <tp:rationale> The GetAll method lets clients retrieve all properties in one round-trip. </tp:rationale>

tp_cli_channel_call_get_handle ()

TpProxyPendingCall * tp_cli_channel_call_get_handle     (TpChannel *proxy,
                                                         gint timeout_ms,
                                                         tp_cli_channel_callback_for_get_handle callback,
                                                         gpointer user_data,
                                                         GDestroyNotify destroy,
                                                         GObject *weak_object);

Start a GetHandle method call.

Returns the handle type and number if this channel represents a communication with a particular contact, room or server-stored list, or zero if it is transient and defined only by its contents. Clients SHOULD use the <tp:member-ref>TargetHandle</tp:member-ref> and <tp:member-ref>TargetHandleType</tp:member-ref> properties instead, falling back to this method only if necessary. <tp:rationale> The GetAll method lets clients retrieve all properties in one round-trip. </tp:rationale>

tp_cli_channel_call_get_interfaces ()

TpProxyPendingCall * tp_cli_channel_call_get_interfaces (TpChannel *proxy,
                                                         gint timeout_ms,
                                                         tp_cli_channel_callback_for_get_interfaces callback,
                                                         gpointer user_data,
                                                         GDestroyNotify destroy,
                                                         GObject *weak_object);

Start a GetInterfaces method call.

Get the optional interfaces implemented by the channel. Clients SHOULD use the <tp:member-ref>Interfaces</tp:member-ref> property instead, falling back to this method only if necessary. <tp:rationale> The GetAll method lets clients retrieve all properties in one round-trip. </tp:rationale>

tp_cli_channel_callback_for_close ()

void                (*tp_cli_channel_callback_for_close)
                                                        (TpChannel *proxy,
                                                         const GError *error,
                                                         gpointer user_data,
                                                         GObject *weak_object);

Signature of the callback called when a Close method call succeeds or fails.

tp_cli_channel_callback_for_get_channel_type ()

void                (*tp_cli_channel_callback_for_get_channel_type)
                                                        (TpChannel *proxy,
                                                         const gchar *out_Channel_Type,
                                                         const GError *error,
                                                         gpointer user_data,
                                                         GObject *weak_object);

Signature of the callback called when a GetChannelType method call succeeds or fails.

tp_cli_channel_callback_for_get_handle ()

void                (*tp_cli_channel_callback_for_get_handle)
                                                        (TpChannel *proxy,
                                                         guint out_Target_Handle_Type,
                                                         guint out_Target_Handle,
                                                         const GError *error,
                                                         gpointer user_data,
                                                         GObject *weak_object);

Signature of the callback called when a GetHandle method call succeeds or fails.

tp_cli_channel_callback_for_get_interfaces ()

void                (*tp_cli_channel_callback_for_get_interfaces)
                                                        (TpChannel *proxy,
                                                         const gchar **out_Interfaces,
                                                         const GError *error,
                                                         gpointer user_data,
                                                         GObject *weak_object);

Signature of the callback called when a GetInterfaces method call succeeds or fails.

tp_cli_channel_run_close ()

gboolean            tp_cli_channel_run_close            (TpChannel *proxy,
                                                         gint timeout_ms,
                                                         GError **error,
                                                         GMainLoop **loop);

Call the method Close and run the main loop until it returns. Before calling this method, you must add a reference to any borrowed objects you need to keep, and generally ensure that everything is in a consistent state.

Request that the channel be closed. This is not the case until the <tp:member-ref>Closed</tp:member-ref> signal has been emitted, and depending on the connection manager this may simply remove you from the channel on the server, rather than causing it to stop existing entirely. Some channels such as contact list channels may not be closed.

tp_cli_channel_run_get_channel_type ()

gboolean            tp_cli_channel_run_get_channel_type (TpChannel *proxy,
                                                         gint timeout_ms,
                                                         gchar **out_Channel_Type,
                                                         GError **error,
                                                         GMainLoop **loop);

Call the method GetChannelType and run the main loop until it returns. Before calling this method, you must add a reference to any borrowed objects you need to keep, and generally ensure that everything is in a consistent state.

Returns the interface name for the type of this channel. Clients SHOULD use the <tp:member-ref>ChannelType</tp:member-ref> property instead, falling back to this method only if necessary. <tp:rationale> The GetAll method lets clients retrieve all properties in one round-trip. </tp:rationale>

tp_cli_channel_run_get_handle ()

gboolean            tp_cli_channel_run_get_handle       (TpChannel *proxy,
                                                         gint timeout_ms,
                                                         guint *out_Target_Handle_Type,
                                                         guint *out_Target_Handle,
                                                         GError **error,
                                                         GMainLoop **loop);

Call the method GetHandle and run the main loop until it returns. Before calling this method, you must add a reference to any borrowed objects you need to keep, and generally ensure that everything is in a consistent state.

Returns the handle type and number if this channel represents a communication with a particular contact, room or server-stored list, or zero if it is transient and defined only by its contents. Clients SHOULD use the <tp:member-ref>TargetHandle</tp:member-ref> and <tp:member-ref>TargetHandleType</tp:member-ref> properties instead, falling back to this method only if necessary. <tp:rationale> The GetAll method lets clients retrieve all properties in one round-trip. </tp:rationale>

tp_cli_channel_run_get_interfaces ()

gboolean            tp_cli_channel_run_get_interfaces   (TpChannel *proxy,
                                                         gint timeout_ms,
                                                         gchar ***out_Interfaces,
                                                         GError **error,
                                                         GMainLoop **loop);

Call the method GetInterfaces and run the main loop until it returns. Before calling this method, you must add a reference to any borrowed objects you need to keep, and generally ensure that everything is in a consistent state.

Get the optional interfaces implemented by the channel. Clients SHOULD use the <tp:member-ref>Interfaces</tp:member-ref> property instead, falling back to this method only if necessary. <tp:rationale> The GetAll method lets clients retrieve all properties in one round-trip. </tp:rationale>

tp_cli_channel_connect_to_closed ()

TpProxySignalConnection * tp_cli_channel_connect_to_closed
                                                        (TpChannel *proxy,
                                                         tp_cli_channel_signal_callback_closed callback,
                                                         gpointer user_data,
                                                         GDestroyNotify destroy,
                                                         GObject *weak_object,
                                                         GError **error);

Connect a handler to the signal Closed.

Emitted when the channel has been closed. Method calls on the channel are no longer valid after this signal has been emitted, and the connection manager may then remove the object from the bus at any point.

tp_cli_channel_signal_callback_closed ()

void                (*tp_cli_channel_signal_callback_closed)
                                                        (TpChannel *proxy,
                                                         gpointer user_data,
                                                         GObject *weak_object);

Represents the signature of a callback for the signal Closed.

tp_cli_channel_interface_destroyable_call_destroy ()

TpProxyPendingCall * tp_cli_channel_interface_destroyable_call_destroy
                                                        (TpChannel *proxy,
                                                         gint timeout_ms,
                                                         tp_cli_channel_interface_destroyable_callback_for_destroy callback,
                                                         gpointer user_data,
                                                         GDestroyNotify destroy,
                                                         GObject *weak_object);

Start a Destroy method call.

<tp:docstring xmlns="http://www.w3.org/1999/xhtml"> <p>Close the channel abruptly, possibly with loss of data. The connection manager MUST NOT re-create the channel unless/until more events occur.</p> <tp:rationale> <p>The main motivating situation for this method is that when a Text channel with pending messages is closed with Close, it comes back as an incoming channel (to avoid a race between Close and an incoming message). If Destroy is called on a Text channel, the CM should delete all pending messages and close the channel, and the channel shouldn't be re-created until/unless another message arrives.</p> </tp:rationale> <p>Most clients SHOULD call <tp:dbus-ref namespace="org.freedesktop.Telepathy">Channel.Close</tp:dbus-ref> instead. However, if a client explicitly intends to destroy the channel with possible loss of data, it SHOULD call this method if this interface is supported (according to the <tp:dbus-ref namespace="org.freedesktop.Telepathy">Channel.Interfaces</tp:dbus-ref> property), falling back to Close if not.</p> <p>In particular, channel dispatchers SHOULD use this method if available when terminating channels that cannot be handled correctly (for instance, if no handler has been installed for a channel type, or if the handler crashes repeatedly).</p> <p>Connection managers do not need to implement this interface on channels where Close and Destroy would be equivalent.</p> <tp:rationale> <p>Callers need to be able to fall back to Close in any case.</p> </tp:rationale>

tp_cli_channel_interface_destroyable_callback_for_destroy ()

void                (*tp_cli_channel_interface_destroyable_callback_for_destroy)
                                                        (TpChannel *proxy,
                                                         const GError *error,
                                                         gpointer user_data,
                                                         GObject *weak_object);

Signature of the callback called when a Destroy method call succeeds or fails.

tp_cli_channel_interface_destroyable_run_destroy ()

gboolean            tp_cli_channel_interface_destroyable_run_destroy
                                                        (TpChannel *proxy,
                                                         gint timeout_ms,
                                                         GError **error,
                                                         GMainLoop **loop);

Call the method Destroy and run the main loop until it returns. Before calling this method, you must add a reference to any borrowed objects you need to keep, and generally ensure that everything is in a consistent state.

<tp:docstring xmlns="http://www.w3.org/1999/xhtml"> <p>Close the channel abruptly, possibly with loss of data. The connection manager MUST NOT re-create the channel unless/until more events occur.</p> <tp:rationale> <p>The main motivating situation for this method is that when a Text channel with pending messages is closed with Close, it comes back as an incoming channel (to avoid a race between Close and an incoming message). If Destroy is called on a Text channel, the CM should delete all pending messages and close the channel, and the channel shouldn't be re-created until/unless another message arrives.</p> </tp:rationale> <p>Most clients SHOULD call <tp:dbus-ref namespace="org.freedesktop.Telepathy">Channel.Close</tp:dbus-ref> instead. However, if a client explicitly intends to destroy the channel with possible loss of data, it SHOULD call this method if this interface is supported (according to the <tp:dbus-ref namespace="org.freedesktop.Telepathy">Channel.Interfaces</tp:dbus-ref> property), falling back to Close if not.</p> <p>In particular, channel dispatchers SHOULD use this method if available when terminating channels that cannot be handled correctly (for instance, if no handler has been installed for a channel type, or if the handler crashes repeatedly).</p> <p>Connection managers do not need to implement this interface on channels where Close and Destroy would be equivalent.</p> <tp:rationale> <p>Callers need to be able to fall back to Close in any case.</p> </tp:rationale>

The "channel-properties" property

  "channel-properties"       GHashTable_gchararray+GValue_*  : Read / Write / Construct Only

The immutable D-Bus properties of this channel, represented by a GHashTable where the keys are D-Bus interface name + "." + property name, and the values are GValue instances.

Read-only except during construction. If this is not provided during construction, a reasonable (but possibly incomplete) version will be made up from the values of individual properties; reading this property repeatedly may yield progressively more complete values until "channel-ready" becomes TRUE.

The "channel-ready" property

  "channel-ready"            gboolean              : Read

Initially FALSE; changes to TRUE when introspection of the channel has finished and it's ready for use.

By the time this property becomes TRUE, the following will be true:

- "channel-type" set, unless introspection failed - "handle-type" and "handle" set, unless introspection failed - any extra interfaces will have been set up in TpProxy (i.e. "interfaces" contains at least all extra Channel interfaces)

In addition, if "interfaces" includes the Group interface:

- the initial value of the "group-self-handle" property will have been fetched and change notification will have been set up - the initial value of the "group-flags" property will have been fetched and change notification will have been set up

Change notification is via notify::channel-ready.

Default value: FALSE

The "connection" property

  "connection"               TpConnection*         : Read / Write / Construct Only

The TpConnection to which this TpChannel belongs. Used for e.g. handle manipulation.

The "group-flags" property

  "group-flags"              guint                 : Read

If this channel is ready ("channel-ready") and is a group, TpChannelGroupFlags indicating the capabilities and behaviour of that group.

Otherwise, 0.

Change notification is via notify::group-flags or TpChannel::group-flags-changed.

Default value: 0

Since 0.7.12

The "group-self-handle" property

  "group-self-handle"        guint                 : Read

If this channel is ready ("channel-ready") and is a group, and the user is a member of it, the TpHandle representing them in this group.

Otherwise, either a handle representing the user, or 0.

Change notification is via notify::group-self-handle.

Default value: 0

Since 0.7.12

The "identifier" property

  "identifier"               gchar*                : Read

This channel's associated identifier, or NULL if no identifier or unknown.

The identifier is the result of inspecting "handle".

Default value: NULL

The "group-flags-changed" signal

void                user_function                      (TpChannel *self,
                                                        guint      added,
                                                        guint      removed,
                                                        gpointer   user_data)      : Run Last / Has Details

Emitted when the "group-flags" property changes while the channel is ready.

Since 0.7.12

The "group-members-changed" signal

void                user_function                      (TpChannel     *self,
                                                        gchar         *message,
                                                        GArray_guint_ *added,
                                                        GArray_guint_ *removed,
                                                        GArray_guint_ *local_pending,
                                                        GArray_guint_ *remote_pending,
                                                        guint          actor,
                                                        guint          reason,
                                                        gpointer       user_data)           : Run Last / Has Details

Emitted when the group members change in a Group channel that is ready.

Since 0.7.12

The "group-members-changed-detailed" signal

void                user_function                      (TpChannel     *self,
                                                        GArray_guint_ *added,
                                                        GArray_guint_ *removed,
                                                        GArray_guint_ *local_pending,
                                                        GArray_guint_ *remote_pending,
                                                        gpointer       user_data)           : Run Last / Has Details

Emitted when the group members change in a Group channel that is ready. Contains a superset of the information in the TpChannel::group-members-changed signal, and is emitted at the same time; applications can connect to this signal and ignore the other.

Since 0.7.21