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/*
* Copyright (C) 2009 Collabora Ltd.
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2.1 of the License, or (at your option) any later version.
*
* This library 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
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this library; if not, write to the Free Software
* Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
*
* Authors: Cosimo Alfarano <cosimo.alfarano@collabora.co.uk>
*/
#include "config.h"
#include "action-chain-internal.h"
typedef struct {
TplPendingAction action;
gpointer user_data;
} TplActionLink;
TplActionChain *
_tpl_action_chain_new_async (GObject *obj,
GAsyncReadyCallback cb,
gpointer user_data)
{
TplActionChain *ret = g_slice_new0 (TplActionChain);
ret->chain = g_queue_new ();
ret->simple = g_simple_async_result_new (obj, cb, user_data,
_tpl_action_chain_new_async);
g_object_set_data (G_OBJECT (ret->simple), "chain", ret);
return ret;
}
static void
link_free (TplActionLink *l)
{
g_slice_free (TplActionLink, l);
}
void
_tpl_action_chain_free (TplActionChain *self)
{
g_queue_foreach (self->chain, (GFunc) link_free, NULL);
g_queue_free (self->chain);
g_object_unref (self->simple);
g_slice_free (TplActionChain, self);
}
gpointer // FIXME GObject *
_tpl_action_chain_get_object (TplActionChain *self)
{
GObject *obj;
g_return_val_if_fail (self != NULL && self->simple != NULL, NULL);
obj = g_async_result_get_source_object (G_ASYNC_RESULT (self->simple));
g_object_unref (obj); /* don't want the extra ref */
return obj;
}
void
_tpl_action_chain_prepend (TplActionChain *self,
TplPendingAction func,
gpointer user_data)
{
TplActionLink *l;
l = g_slice_new0 (TplActionLink);
l->action = func;
l->user_data = user_data;
g_queue_push_head (self->chain, l);
}
void
_tpl_action_chain_append (TplActionChain *self,
TplPendingAction func,
gpointer user_data)
{
TplActionLink *l;
l = g_slice_new0 (TplActionLink);
l->action = func;
l->user_data = user_data;
g_queue_push_tail (self->chain, l);
}
void
_tpl_action_chain_start (TplActionChain *self)
{
g_return_if_fail (!g_queue_is_empty (self->chain));
if (self->running)
return;
_tpl_action_chain_continue (self);
}
void
_tpl_action_chain_continue (TplActionChain *self)
{
if (g_queue_is_empty (self->chain))
{
self->running = FALSE;
g_simple_async_result_complete (self->simple);
}
else
{
TplActionLink *l = g_queue_pop_head (self->chain);
self->running = TRUE;
l->action (self, l->user_data);
link_free (l);
if (g_queue_is_empty (self->chain))
self->running = FALSE;
}
}
void
_tpl_action_chain_clear (TplActionChain *self)
{
g_queue_foreach (self->chain, (GFunc) link_free, NULL);
g_queue_clear (self->chain);
}
void
_tpl_action_chain_terminate (TplActionChain *self,
const GError *error)
{
GSimpleAsyncResult *simple = self->simple;
g_assert (error != NULL);
g_simple_async_result_set_from_error (simple, error);
g_simple_async_result_complete (simple);
}
/**
* _tpl_action_chain_new_finish:
* @source: the #GObject pass to _tpl_action_chain_new_async()
* @result: the #GAsyncResult pass in callback
* @error: a pointer to a #GError that will be set on error, or NULL to ignore
*
* Get the result from running the action chain (%TRUE if the chain completed
* successfully, %FALSE with @error set if it was terminated).
*
* This function also frees the chain.
*
* Returns: %TRUE on success, %FALSE with @error set on error.
*/
gboolean
_tpl_action_chain_new_finish (GObject *source,
GAsyncResult *result,
GError **error)
{
TplActionChain *chain;
g_return_val_if_fail (g_simple_async_result_is_valid (result, source,
_tpl_action_chain_new_async), FALSE);
chain = g_object_get_data (G_OBJECT (result), "chain");
g_return_val_if_fail (chain != NULL, FALSE);
if (g_simple_async_result_propagate_error (G_SIMPLE_ASYNC_RESULT (result),
error))
return FALSE;
_tpl_action_chain_free (chain);
return TRUE;
}
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