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mutter/clutter/clutter-score.c
Emmanuele Bassi 79acb088e7 Remove mentions of the FSF address 
Since using addresses that might change is something that finally
the FSF acknowledge as a plausible scenario (after changing address
twice), the license blurb in the source files should use the URI
for getting the license in case the library did not come with it.

Not that URIs cannot possibly change, but at least it's easier to
set up a redirection at the same place.

As a side note: this commit closes the oldes bug in Clutter's bug
report tool.

http://bugzilla.openedhand.com/show_bug.cgi?id=521
2010-03-01 12:56:10 +00:00

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/*
* Clutter.
*
* An OpenGL based 'interactive canvas' library.
*
* Authored By Matthew Allum <mallum@openedhand.com>
*
* Copyright (C) 2007 OpenedHand
*
* 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 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, see <http://www.gnu.org/licenses/>.
*
*
*/
/**
* SECTION:clutter-score
* @short_description: Controller for multiple timelines
*
* #ClutterScore is a base class for sequencing multiple timelines in order.
* Using #ClutterScore it is possible to start multiple timelines at the
* same time or launch multiple timelines when a particular timeline has
* emitted the ClutterTimeline::completed signal.
*
* Each time a #ClutterTimeline is started and completed, a signal will be
* emitted.
*
* For example, this code will start two #ClutterTimeline<!-- -->s after
* a third timeline terminates:
*
* |[
* ClutterTimeline *timeline_1, *timeline_2, *timeline_3;
* ClutterScore *score;
*
* timeline_1 = clutter_timeline_new_for_duration (1000);
* timeline_2 = clutter_timeline_new_for_duration (500);
* timeline_3 = clutter_timeline_new_for_duration (500);
*
* score = clutter_score_new ();
*
* clutter_score_append (score, NULL, timeline_1);
* clutter_score_append (score, timeline_1, timeline_2);
* clutter_score_append (score, timeline_1, timeline_3);
*
* clutter_score_start (score);
* ]|
*
* A #ClutterScore takes a reference on the timelines it manages,
* so timelines can be safely unreferenced after being appended.
*
* New timelines can be appended to the #ClutterScore using
* clutter_score_append() and removed using clutter_score_remove().
*
* Timelines can also be appended to a specific marker on the
* parent timeline, using clutter_score_append_at_marker().
*
* The score can be cleared using clutter_score_remove_all().
*
* The list of timelines can be retrieved using
* clutter_score_list_timelines().
*
* The score state is controlled using clutter_score_start(),
* clutter_score_pause(), clutter_score_stop() and clutter_score_rewind().
* The state can be queried using clutter_score_is_playing().
*
* #ClutterScore is available since Clutter 0.6
*/
#ifdef HAVE_CONFIG_H
#include "config.h"
#endif
#include "clutter-score.h"
#include "clutter-main.h"
#include "clutter-marshal.h"
#include "clutter-private.h"
#include "clutter-debug.h"
typedef struct _ClutterScoreEntry ClutterScoreEntry;
struct _ClutterScoreEntry
{
/* the entry unique id */
gulong id;
ClutterTimeline *timeline;
ClutterTimeline *parent;
/* the optional marker on the parent */
gchar *marker;
/* signal handlers id */
gulong complete_id;
gulong marker_id;
ClutterScore *score;
/* pointer back to the tree structure */
GNode *node;
};
#define CLUTTER_SCORE_GET_PRIVATE(obj) (G_TYPE_INSTANCE_GET_PRIVATE ((obj), CLUTTER_TYPE_SCORE, ClutterScorePrivate))
struct _ClutterScorePrivate
{
GNode *root;
GHashTable *running_timelines;
gulong last_id;
guint is_paused : 1;
guint loop : 1;
};
enum
{
PROP_0,
PROP_LOOP
};
enum
{
TIMELINE_STARTED,
TIMELINE_COMPLETED,
STARTED,
PAUSED,
COMPLETED,
LAST_SIGNAL
};
static inline void clutter_score_clear (ClutterScore *score);
G_DEFINE_TYPE (ClutterScore, clutter_score, G_TYPE_OBJECT);
static int score_signals[LAST_SIGNAL] = { 0 };
/* Object */
static void
clutter_score_set_property (GObject *gobject,
guint prop_id,
const GValue *value,
GParamSpec *pspec)
{
ClutterScorePrivate *priv = CLUTTER_SCORE_GET_PRIVATE (gobject);
switch (prop_id)
{
case PROP_LOOP:
priv->loop = g_value_get_boolean (value);
break;
default:
G_OBJECT_WARN_INVALID_PROPERTY_ID (gobject, prop_id, pspec);
break;
}
}
static void
clutter_score_get_property (GObject *gobject,
guint prop_id,
GValue *value,
GParamSpec *pspec)
{
ClutterScorePrivate *priv = CLUTTER_SCORE_GET_PRIVATE (gobject);
switch (prop_id)
{
case PROP_LOOP:
g_value_set_boolean (value, priv->loop);
break;
default:
G_OBJECT_WARN_INVALID_PROPERTY_ID (gobject, prop_id, pspec);
break;
}
}
static void
clutter_score_finalize (GObject *object)
{
ClutterScore *score = CLUTTER_SCORE (object);
clutter_score_stop (score);
clutter_score_clear (score);
G_OBJECT_CLASS (clutter_score_parent_class)->finalize (object);
}
static void
clutter_score_class_init (ClutterScoreClass *klass)
{
GObjectClass *gobject_class = G_OBJECT_CLASS (klass);
gobject_class->set_property = clutter_score_set_property;
gobject_class->get_property = clutter_score_get_property;
gobject_class->finalize = clutter_score_finalize;
g_type_class_add_private (klass, sizeof (ClutterScorePrivate));
/**
* ClutterScore:loop:
*
* Whether the #ClutterScore should restart once finished.
*
* Since: 0.6
*/
g_object_class_install_property (gobject_class,
PROP_LOOP,
g_param_spec_boolean ("loop",
"Loop",
"Whether the score should restart once finished",
FALSE,
CLUTTER_PARAM_READWRITE));
/**
* ClutterScore::timeline-started:
* @score: the score which received the signal
* @timeline: the current timeline
*
* The ::timeline-started signal is emitted each time a new timeline
* inside a #ClutterScore starts playing.
*
* Since: 0.6
*/
score_signals[TIMELINE_STARTED] =
g_signal_new ("timeline-started",
G_TYPE_FROM_CLASS (gobject_class),
G_SIGNAL_RUN_LAST,
G_STRUCT_OFFSET (ClutterScoreClass, timeline_started),
NULL, NULL,
clutter_marshal_VOID__OBJECT,
G_TYPE_NONE,
1, CLUTTER_TYPE_TIMELINE);
/**
* ClutterScore::timeline-completed:
* @score: the score which received the signal
* @timeline: the completed timeline
*
* The ::timeline-completed signal is emitted each time a timeline
* inside a #ClutterScore terminates.
*
* Since: 0.6
*/
score_signals[TIMELINE_COMPLETED] =
g_signal_new ("timeline-completed",
G_TYPE_FROM_CLASS (gobject_class),
G_SIGNAL_RUN_LAST,
G_STRUCT_OFFSET (ClutterScoreClass, timeline_completed),
NULL, NULL,
clutter_marshal_VOID__OBJECT,
G_TYPE_NONE, 1,
CLUTTER_TYPE_TIMELINE);
/**
* ClutterScore::completed:
* @score: the score which received the signal
*
* The ::completed signal is emitted each time a #ClutterScore terminates.
*
* Since: 0.6
*/
score_signals[COMPLETED] =
g_signal_new ("completed",
G_TYPE_FROM_CLASS (gobject_class),
G_SIGNAL_RUN_LAST,
G_STRUCT_OFFSET (ClutterScoreClass, completed),
NULL, NULL,
clutter_marshal_VOID__VOID,
G_TYPE_NONE, 0);
/**
* ClutterScore::started:
* @score: the score which received the signal
*
* The ::started signal is emitted each time a #ClutterScore starts playing.
*
* Since: 0.6
*/
score_signals[STARTED] =
g_signal_new ("started",
G_TYPE_FROM_CLASS (gobject_class),
G_SIGNAL_RUN_LAST,
G_STRUCT_OFFSET (ClutterScoreClass, started),
NULL, NULL,
clutter_marshal_VOID__VOID,
G_TYPE_NONE, 0);
/**
* ClutterScore::paused:
* @score: the score which received the signal
*
* The ::paused signal is emitted each time a #ClutterScore
* is paused.
*
* Since: 0.6
*/
score_signals[PAUSED] =
g_signal_new ("paused",
G_TYPE_FROM_CLASS (gobject_class),
G_SIGNAL_RUN_LAST,
G_STRUCT_OFFSET (ClutterScoreClass, paused),
NULL, NULL,
clutter_marshal_VOID__VOID,
G_TYPE_NONE, 0);
}
static void
clutter_score_init (ClutterScore *self)
{
ClutterScorePrivate *priv;
self->priv = priv = CLUTTER_SCORE_GET_PRIVATE (self);
/* sentinel */
priv->root = g_node_new (NULL);
priv->running_timelines = NULL;
priv->is_paused = FALSE;
priv->loop = FALSE;
priv->last_id = 1;
}
/**
* clutter_score_new:
*
* Creates a new #ClutterScore. A #ClutterScore is an object that can
* hold multiple #ClutterTimeline<!-- -->s in a sequential order.
*
* Return value: the newly created #ClutterScore. Use g_object_unref()
* when done.
*
* Since: 0.6
*/
ClutterScore *
clutter_score_new (void)
{
return g_object_new (CLUTTER_TYPE_SCORE, NULL);
}
/**
* clutter_score_set_loop:
* @score: a #ClutterScore
* @loop: %TRUE for enable looping
*
* Sets whether @score should loop. A looping #ClutterScore will start
* from its initial state after the ::complete signal has been fired.
*
* Since: 0.6
*/
void
clutter_score_set_loop (ClutterScore *score,
gboolean loop)
{
g_return_if_fail (CLUTTER_IS_SCORE (score));
if (score->priv->loop != loop)
{
score->priv->loop = loop;
g_object_notify (G_OBJECT (score), "loop");
}
}
/**
* clutter_score_get_loop:
* @score: a #ClutterScore
*
* Gets whether @score is looping
*
* Return value: %TRUE if the score is looping
*
* Since: 0.6
*/
gboolean
clutter_score_get_loop (ClutterScore *score)
{
g_return_val_if_fail (CLUTTER_IS_SCORE (score), FALSE);
return score->priv->loop;
}
/**
* clutter_score_is_playing:
* @score: A #ClutterScore
*
* Query state of a #ClutterScore instance.
*
* Return Value: %TRUE if score is currently playing
*
* Since: 0.6
*/
gboolean
clutter_score_is_playing (ClutterScore *score)
{
g_return_val_if_fail (CLUTTER_IS_SCORE (score), FALSE);
if (score->priv->is_paused)
return FALSE;
return score->priv->running_timelines
&& g_hash_table_size (score->priv->running_timelines) != 0;
}
/* destroy_entry:
* @node: a #GNode
*
* Frees the #ClutterScoreEntry attached to @node.
*/
static gboolean
destroy_entry (GNode *node,
G_GNUC_UNUSED gpointer data)
{
ClutterScoreEntry *entry = node->data;
if (G_LIKELY (entry != NULL))
{
if (entry->marker_id)
{
g_signal_handler_disconnect (entry->parent, entry->marker_id);
entry->marker_id = 0;
}
if (entry->complete_id)
{
g_signal_handler_disconnect (entry->timeline, entry->complete_id);
entry->complete_id = 0;
}
g_object_unref (entry->timeline);
g_free (entry->marker);
g_slice_free (ClutterScoreEntry, entry);
node->data = NULL;
}
/* continue */
return FALSE;
}
typedef enum {
FIND_BY_TIMELINE,
FIND_BY_ID,
REMOVE_BY_ID,
LIST_TIMELINES
} TraverseAction;
typedef struct {
TraverseAction action;
ClutterScore *score;
/* parameters */
union {
ClutterTimeline *timeline;
gulong id;
ClutterScoreEntry *entry;
} d;
gpointer result;
} TraverseClosure;
/* multi-purpose traversal function for the N-ary tree used by the score */
static gboolean
traverse_children (GNode *node,
gpointer data)
{
TraverseClosure *closure = data;
ClutterScoreEntry *entry = node->data;
gboolean retval = FALSE;
/* root */
if (!entry)
return TRUE;
switch (closure->action)
{
case FIND_BY_TIMELINE:
if (closure->d.timeline == entry->timeline)
{
closure->result = node;
retval = TRUE;
}
break;
case FIND_BY_ID:
if (closure->d.id == entry->id)
{
closure->result = node;
retval = TRUE;
}
break;
case REMOVE_BY_ID:
if (closure->d.id == entry->id)
{
/* Destroy all the child entries of this node */
g_node_traverse (node,
G_POST_ORDER,
G_TRAVERSE_ALL,
-1,
destroy_entry, NULL);
/* Keep track of this node so that it will be destroyed
further up */
closure->result = node;
retval = TRUE;
}
break;
case LIST_TIMELINES:
closure->result = g_slist_prepend (closure->result, entry->timeline);
retval = FALSE;
break;
}
return retval;
}
static GNode *
find_entry_by_timeline (ClutterScore *score,
ClutterTimeline *timeline)
{
ClutterScorePrivate *priv = score->priv;
TraverseClosure closure;
closure.action = FIND_BY_TIMELINE;
closure.score = score;
closure.d.timeline = timeline;
closure.result = NULL;
g_node_traverse (priv->root,
G_POST_ORDER,
G_TRAVERSE_ALL,
-1,
traverse_children, &closure);
if (closure.result)
return closure.result;
return NULL;
}
static GNode *
find_entry_by_id (ClutterScore *score,
gulong id)
{
ClutterScorePrivate *priv = score->priv;
TraverseClosure closure;
closure.action = FIND_BY_ID;
closure.score = score;
closure.d.id = id;
closure.result = NULL;
g_node_traverse (priv->root,
G_POST_ORDER,
G_TRAVERSE_ALL,
-1,
traverse_children, &closure);
if (closure.result)
return closure.result;
return NULL;
}
/* forward declaration */
static void start_entry (ClutterScoreEntry *entry);
static void
start_children_entries (GNode *node,
gpointer data)
{
ClutterScoreEntry *entry = node->data;
/* If data is NULL, start all entries that have no marker, otherwise
only start entries that have the same marker */
if (data == NULL
? entry->marker == NULL
: (entry->marker && !strcmp (data, entry->marker)))
start_entry (entry);
}
static void
on_timeline_marker (ClutterTimeline *timeline,
const gchar *marker_name,
gint frame_num,
ClutterScoreEntry *entry)
{
GNode *parent;
CLUTTER_NOTE (SCHEDULER, "timeline [%p] marker ('%s') reached",
entry->timeline,
entry->marker);
parent = find_entry_by_timeline (entry->score, timeline);
if (!parent)
return;
/* start every child */
if (parent->children)
{
g_node_children_foreach (parent,
G_TRAVERSE_ALL,
start_children_entries,
(gpointer) marker_name);
}
}
static void
on_timeline_completed (ClutterTimeline *timeline,
ClutterScoreEntry *entry)
{
ClutterScorePrivate *priv = entry->score->priv;
g_hash_table_remove (priv->running_timelines,
GUINT_TO_POINTER (entry->id));
g_signal_handler_disconnect (timeline, entry->complete_id);
entry->complete_id = 0;
CLUTTER_NOTE (SCHEDULER, "timeline [%p] ('%lu') completed",
entry->timeline,
entry->id);
g_signal_emit (entry->score, score_signals[TIMELINE_COMPLETED], 0,
entry->timeline);
/* start every child */
if (entry->node->children)
{
g_node_children_foreach (entry->node,
G_TRAVERSE_ALL,
start_children_entries,
NULL);
}
/* score has finished - fire 'completed' signal */
if (g_hash_table_size (priv->running_timelines) == 0)
{
CLUTTER_NOTE (SCHEDULER, "looks like we finished");
g_signal_emit (entry->score, score_signals[COMPLETED], 0);
clutter_score_stop (entry->score);
if (priv->loop)
clutter_score_start (entry->score);
}
}
static void
start_entry (ClutterScoreEntry *entry)
{
ClutterScorePrivate *priv = entry->score->priv;
/* timelines attached to a marker might already be playing when we
* end up here from the ::completed handler, so we need to perform
* this check to avoid restarting those timelines
*/
if (clutter_timeline_is_playing (entry->timeline))
return;
entry->complete_id = g_signal_connect (entry->timeline,
"completed",
G_CALLBACK (on_timeline_completed),
entry);
CLUTTER_NOTE (SCHEDULER, "timeline [%p] ('%lu') started",
entry->timeline,
entry->id);
if (G_UNLIKELY (priv->running_timelines == NULL))
priv->running_timelines = g_hash_table_new (NULL, NULL);
g_hash_table_insert (priv->running_timelines,
GUINT_TO_POINTER (entry->id),
entry);
clutter_timeline_start (entry->timeline);
g_signal_emit (entry->score, score_signals[TIMELINE_STARTED], 0,
entry->timeline);
}
enum
{
ACTION_START,
ACTION_PAUSE,
ACTION_STOP
};
static void
foreach_running_timeline (gpointer key,
gpointer value,
gpointer user_data)
{
ClutterScoreEntry *entry = value;
gint action = GPOINTER_TO_INT (user_data);
switch (action)
{
case ACTION_START:
clutter_timeline_start (entry->timeline);
break;
case ACTION_PAUSE:
clutter_timeline_pause (entry->timeline);
break;
case ACTION_STOP:
if (entry->complete_id)
{
g_signal_handler_disconnect (entry->timeline, entry->complete_id);
entry->complete_id = 0;
}
clutter_timeline_stop (entry->timeline);
break;
}
}
/**
* clutter_score_start:
* @score: A #ClutterScore
*
* Starts the score.
*
* Since: 0.6
*/
void
clutter_score_start (ClutterScore *score)
{
ClutterScorePrivate *priv;
g_return_if_fail (CLUTTER_IS_SCORE (score));
priv = score->priv;
if (priv->is_paused)
{
g_hash_table_foreach (priv->running_timelines,
foreach_running_timeline,
GINT_TO_POINTER (ACTION_START));
priv->is_paused = FALSE;
}
else
{
g_signal_emit (score, score_signals[STARTED], 0);
g_node_children_foreach (priv->root,
G_TRAVERSE_ALL,
start_children_entries,
NULL);
}
}
/**
* clutter_score_stop:
* @score: A #ClutterScore
*
* Stops and rewinds a playing #ClutterScore instance.
*
* Since: 0.6
*/
void
clutter_score_stop (ClutterScore *score)
{
ClutterScorePrivate *priv;
g_return_if_fail (CLUTTER_IS_SCORE (score));
priv = score->priv;
if (priv->running_timelines)
{
g_hash_table_foreach (priv->running_timelines,
foreach_running_timeline,
GINT_TO_POINTER (ACTION_STOP));
g_hash_table_destroy (priv->running_timelines);
priv->running_timelines = NULL;
}
}
/**
* clutter_score_pause:
* @score: a #ClutterScore
*
* Pauses a playing score @score.
*
* Since: 0.6
*/
void
clutter_score_pause (ClutterScore *score)
{
ClutterScorePrivate *priv;
g_return_if_fail (CLUTTER_IS_SCORE (score));
priv = score->priv;
if (!clutter_score_is_playing (score))
return;
g_hash_table_foreach (priv->running_timelines,
foreach_running_timeline,
GINT_TO_POINTER (ACTION_PAUSE));
priv->is_paused = TRUE;
g_signal_emit (score, score_signals[PAUSED], 0);
}
/**
* clutter_score_rewind:
* @score: A #ClutterScore
*
* Rewinds a #ClutterScore to its initial state.
*
* Since: 0.6
*/
void
clutter_score_rewind (ClutterScore *score)
{
gboolean was_playing;
g_return_if_fail (CLUTTER_IS_SCORE (score));
was_playing = clutter_score_is_playing (score);
clutter_score_stop (score);
if (was_playing)
clutter_score_start (score);
}
static inline void
clutter_score_clear (ClutterScore *score)
{
ClutterScorePrivate *priv = score->priv;
g_node_traverse (priv->root,
G_POST_ORDER,
G_TRAVERSE_ALL,
-1,
destroy_entry, NULL);
g_node_destroy (priv->root);
}
/**
* clutter_score_append:
* @score: a #ClutterScore
* @parent: a #ClutterTimeline in the score, or %NULL
* @timeline: a #ClutterTimeline
*
* Appends a timeline to another one existing in the score; the newly
* appended timeline will be started when @parent is complete.
*
* If @parent is %NULL, the new #ClutterTimeline will be started when
* clutter_score_start() is called.
*
* #ClutterScore will take a reference on @timeline.
*
* Return value: the id of the #ClutterTimeline inside the score, or
* 0 on failure. The returned id can be used with clutter_score_remove()
* or clutter_score_get_timeline().
*
* Since: 0.6
*/
gulong
clutter_score_append (ClutterScore *score,
ClutterTimeline *parent,
ClutterTimeline *timeline)
{
ClutterScorePrivate *priv;
ClutterScoreEntry *entry;
g_return_val_if_fail (CLUTTER_IS_SCORE (score), 0);
g_return_val_if_fail (parent == NULL || CLUTTER_IS_TIMELINE (parent), 0);
g_return_val_if_fail (CLUTTER_IS_TIMELINE (timeline), 0);
priv = score->priv;
if (!parent)
{
entry = g_slice_new (ClutterScoreEntry);
entry->timeline = g_object_ref (timeline);
entry->parent = NULL;
entry->id = priv->last_id;
entry->marker = NULL;
entry->marker_id = 0;
entry->complete_id = 0;
entry->score = score;
entry->node = g_node_append_data (priv->root, entry);
}
else
{
GNode *node;
node = find_entry_by_timeline (score, parent);
if (G_UNLIKELY (!node))
{
g_warning ("Unable to find the parent timeline inside the score.");
return 0;
}
entry = g_slice_new (ClutterScoreEntry);
entry->timeline = g_object_ref (timeline);
entry->parent = parent;
entry->id = priv->last_id;
entry->marker = NULL;
entry->marker_id = 0;
entry->complete_id = 0;
entry->score = score;
entry->node = g_node_append_data (node, entry);
}
priv->last_id += 1;
return entry->id;
}
/**
* clutter_score_append_at_marker:
* @score: a #ClutterScore
* @parent: the parent #ClutterTimeline
* @marker_name: the name of the marker to use
* @timeline: the #ClutterTimeline to append
*
* Appends @timeline at the given @marker_name on the @parent
* #ClutterTimeline.
*
* If you want to append @timeline at the end of @parent, use
* clutter_score_append().
*
* The #ClutterScore will take a reference on @timeline.
*
* Return value: the id of the #ClutterTimeline inside the score, or
* 0 on failure. The returned id can be used with clutter_score_remove()
* or clutter_score_get_timeline().
*
* Since: 0.8
*/
gulong
clutter_score_append_at_marker (ClutterScore *score,
ClutterTimeline *parent,
const gchar *marker_name,
ClutterTimeline *timeline)
{
ClutterScorePrivate *priv;
GNode *node;
ClutterScoreEntry *entry;
gchar *marker_reached_signal;
g_return_val_if_fail (CLUTTER_IS_SCORE (score), 0);
g_return_val_if_fail (CLUTTER_IS_TIMELINE (parent), 0);
g_return_val_if_fail (marker_name != NULL, 0);
g_return_val_if_fail (CLUTTER_IS_TIMELINE (timeline), 0);
if (!clutter_timeline_has_marker (parent, marker_name))
{
g_warning ("The parent timeline has no marker '%s'", marker_name);
return 0;
}
priv = score->priv;
node = find_entry_by_timeline (score, parent);
if (G_UNLIKELY (!node))
{
g_warning ("Unable to find the parent timeline inside the score.");
return 0;
}
entry = g_slice_new (ClutterScoreEntry);
entry->timeline = g_object_ref (timeline);
entry->parent = parent;
entry->marker = g_strdup (marker_name);
entry->id = priv->last_id;
entry->score = score;
marker_reached_signal = g_strdup_printf ("marker-reached::%s", marker_name);
entry->marker_id = g_signal_connect (entry->parent,
marker_reached_signal,
G_CALLBACK (on_timeline_marker),
entry);
entry->node = g_node_append_data (node, entry);
g_free (marker_reached_signal);
priv->last_id += 1;
return entry->id;
}
/**
* clutter_score_remove:
* @score: a #ClutterScore
* @id: the id of the timeline to remove
*
* Removes the #ClutterTimeline with the given id inside @score. If
* the timeline has other timelines attached to it, those are removed
* as well.
*
* Since: 0.6
*/
void
clutter_score_remove (ClutterScore *score,
gulong id)
{
ClutterScorePrivate *priv;
TraverseClosure closure;
g_return_if_fail (CLUTTER_IS_SCORE (score));
g_return_if_fail (id > 0);
priv = score->priv;
closure.action = REMOVE_BY_ID;
closure.score = score;
closure.d.id = id;
closure.result = NULL;
g_node_traverse (priv->root,
G_POST_ORDER,
G_TRAVERSE_ALL,
-1,
traverse_children, &closure);
if (closure.result)
g_node_destroy (closure.result);
}
/**
* clutter_score_remove_all:
* @score: a #ClutterScore
*
* Removes all the timelines inside @score.
*
* Since: 0.6
*/
void
clutter_score_remove_all (ClutterScore *score)
{
ClutterScorePrivate *priv;
g_return_if_fail (CLUTTER_IS_SCORE (score));
priv = score->priv;
/* this will take care of the running timelines */
clutter_score_stop (score);
/* destroy all the contents of the tree */
clutter_score_clear (score);
/* recreate the sentinel */
priv->root = g_node_new (NULL);
}
/**
* clutter_score_get_timeline:
* @score: a #ClutterScore
* @id: the id of the timeline
*
* Retrieves the #ClutterTimeline for @id inside @score.
*
* Return value: (transfer none): the requested timeline, or %NULL. This
* function does not increase the reference count on the returned
* #ClutterTimeline
*
* Since: 0.6
*/
ClutterTimeline *
clutter_score_get_timeline (ClutterScore *score,
gulong id)
{
GNode *node;
ClutterScoreEntry *entry;
g_return_val_if_fail (CLUTTER_IS_SCORE (score), NULL);
g_return_val_if_fail (id > 0, NULL);
node = find_entry_by_id (score, id);
if (G_UNLIKELY (!node))
return NULL;
entry = node->data;
return entry->timeline;
}
/**
* clutter_score_list_timelines:
* @score: a #ClutterScore
*
* Retrieves a list of all the #ClutterTimelines managed by @score.
*
* Return value: (transfer container) (element-type ClutterTimeline): a #GSList
* containing all the timelines in the score. This function does not increase
* the reference count of the returned timelines. Use g_slist_free() on the
* returned list to deallocate its resources.
*
* Since: 0.6
*/
GSList *
clutter_score_list_timelines (ClutterScore *score)
{
ClutterScorePrivate *priv;
TraverseClosure closure;
GSList *retval;
g_return_val_if_fail (CLUTTER_IS_SCORE (score), NULL);
priv = score->priv;
closure.action = LIST_TIMELINES;
closure.result = NULL;
g_node_traverse (priv->root,
G_POST_ORDER,
G_TRAVERSE_ALL,
-1,
traverse_children, &closure);
retval = closure.result;
return retval;
}
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