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clutter/stage: Add an API for shallow relayouts

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Where "shallow" means you can specify any actor instead of every relayout
having to start from the stage.

https://gitlab.gnome.org/GNOME/mutter/merge_requests/575
This commit is contained in:
Daniel van Vugt 2019-05-07 13:02:55 +08:00 committed by verdre
parent 5723bd8ec7
commit 5257c6ecc2
2 changed files with 74 additions and 34 deletions
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3
clutter/clutter/clutter-stage-private.h
View file

@ -141,6 +141,9 @@ void _clutter_stage_presented (ClutterStage *stag
GList * _clutter_stage_peek_stage_views (ClutterStage *stage);
void clutter_stage_queue_actor_relayout (ClutterStage *stage,
ClutterActor *actor);
G_END_DECLS
#endif /* __CLUTTER_STAGE_PRIVATE_H__ */

105
clutter/clutter/clutter-stage.c
View file

@ -120,6 +120,8 @@ struct _ClutterStagePrivate
ClutterPlane current_clip_planes[4];
GHashTable *pending_relayouts;
unsigned int pending_relayouts_version;
GList *pending_queue_redraws;
gint sync_delay;
@ -146,7 +148,6 @@ struct _ClutterStagePrivate
int update_freeze_count;
guint relayout_pending : 1;
guint redraw_pending : 1;
guint is_cursor_visible : 1;
guint throttle_motion_events : 1;
@ -1287,7 +1288,26 @@ _clutter_stage_needs_update (ClutterStage *stage)
priv = stage->priv;
return priv->relayout_pending || priv->redraw_pending;
return priv->redraw_pending || g_hash_table_size (priv->pending_relayouts) > 0;
}
void
clutter_stage_queue_actor_relayout (ClutterStage *stage,
ClutterActor *actor)
{
ClutterStagePrivate *priv = stage->priv;
if (g_hash_table_contains (priv->pending_relayouts, stage))
return;
if (g_hash_table_size (priv->pending_relayouts) == 0)
_clutter_stage_schedule_update (stage);
if (actor == (ClutterActor *) stage)
g_hash_table_remove_all (priv->pending_relayouts);
g_hash_table_add (priv->pending_relayouts, g_object_ref (actor));
priv->pending_relayouts_version++;
}
void
@ -1295,41 +1315,58 @@ _clutter_stage_maybe_relayout (ClutterActor *actor)
{
ClutterStage *stage = CLUTTER_STAGE (actor);
ClutterStagePrivate *priv = stage->priv;
gfloat natural_width, natural_height;
ClutterActorBox box = { 0, };
GHashTableIter iter;
gpointer key;
int count = 0;
if (!priv->relayout_pending)
/* No work to do? Avoid the extraneous debug log messages too. */
if (g_hash_table_size (priv->pending_relayouts) == 0)
return;
/* avoid reentrancy */
if (!CLUTTER_ACTOR_IN_RELAYOUT (stage))
CLUTTER_NOTE (ACTOR, ">>> Recomputing layout");
g_hash_table_iter_init (&iter, priv->pending_relayouts);
while (g_hash_table_iter_next (&iter, &key, NULL))
{
priv->relayout_pending = FALSE;
priv->stage_was_relayout = TRUE;
g_autoptr (ClutterActor) queued_actor = key;
unsigned int old_version;
CLUTTER_NOTE (ACTOR, "Recomputing layout");
g_hash_table_iter_steal (&iter);
priv->pending_relayouts_version++;
CLUTTER_SET_PRIVATE_FLAGS (stage, CLUTTER_IN_RELAYOUT);
if (CLUTTER_ACTOR_IN_RELAYOUT (queued_actor)) /* avoid reentrancy */
continue;
natural_width = natural_height = 0;
clutter_actor_get_preferred_size (CLUTTER_ACTOR (stage),
NULL, NULL,
&natural_width, &natural_height);
/* An actor may have been destroyed or hidden between queuing and now */
if (clutter_actor_get_stage (queued_actor) != actor)
continue;
box.x1 = 0;
box.y1 = 0;
box.x2 = natural_width;
box.y2 = natural_height;
if (queued_actor == actor)
CLUTTER_NOTE (ACTOR, " Deep relayout of stage %s",
_clutter_actor_get_debug_name (queued_actor));
else
CLUTTER_NOTE (ACTOR, " Shallow relayout of actor %s",
_clutter_actor_get_debug_name (queued_actor));
CLUTTER_NOTE (ACTOR, "Allocating (0, 0 - %d, %d) for the stage",
(int) natural_width,
(int) natural_height);
CLUTTER_SET_PRIVATE_FLAGS (queued_actor, CLUTTER_IN_RELAYOUT);
clutter_actor_allocate (CLUTTER_ACTOR (stage),
&box, CLUTTER_ALLOCATION_NONE);
old_version = priv->pending_relayouts_version;
clutter_actor_allocate_preferred_size (queued_actor,
CLUTTER_ALLOCATION_NONE);
CLUTTER_UNSET_PRIVATE_FLAGS (stage, CLUTTER_IN_RELAYOUT);
CLUTTER_UNSET_PRIVATE_FLAGS (queued_actor, CLUTTER_IN_RELAYOUT);
count++;
/* Prevent using an iterator that's been invalidated */
if (old_version != priv->pending_relayouts_version)
g_hash_table_iter_init (&iter, priv->pending_relayouts);
}
CLUTTER_NOTE (ACTOR, "<<< Completed recomputing layout of %d subtrees", count);
if (count)
priv->stage_was_relayout = TRUE;
}
static void
@ -1511,14 +1548,9 @@ static void
clutter_stage_real_queue_relayout (ClutterActor *self)
{
ClutterStage *stage = CLUTTER_STAGE (self);
ClutterStagePrivate *priv = stage->priv;
ClutterActorClass *parent_class;
if (!priv->relayout_pending)
{
_clutter_stage_schedule_update (stage);
priv->relayout_pending = TRUE;
}
clutter_stage_queue_actor_relayout (stage, self);
/* chain up */
parent_class = CLUTTER_ACTOR_CLASS (clutter_stage_parent_class);
@ -1912,6 +1944,8 @@ clutter_stage_dispose (GObject *object)
(GDestroyNotify) free_queue_redraw_entry);
priv->pending_queue_redraws = NULL;
g_clear_pointer (&priv->pending_relayouts, g_hash_table_destroy);
/* this will release the reference on the stage */
stage_manager = clutter_stage_manager_get_default ();
_clutter_stage_manager_remove_stage (stage_manager, stage);
@ -2271,7 +2305,11 @@ clutter_stage_init (ClutterStage *self)
clutter_actor_set_background_color (CLUTTER_ACTOR (self),
&default_stage_color);
priv->relayout_pending = TRUE;
priv->pending_relayouts = g_hash_table_new_full (NULL,
NULL,
g_object_unref,
NULL);
clutter_stage_queue_actor_relayout (self, CLUTTER_ACTOR (self));
clutter_actor_set_reactive (CLUTTER_ACTOR (self), TRUE);
clutter_stage_set_title (self, g_get_prgname ());
@ -3346,10 +3384,9 @@ clutter_stage_ensure_redraw (ClutterStage *stage)
priv = stage->priv;
if (!priv->relayout_pending && !priv->redraw_pending)
if (!_clutter_stage_needs_update (stage))
_clutter_stage_schedule_update (stage);
priv->relayout_pending = TRUE;
priv->redraw_pending = TRUE;
master_clock = _clutter_master_clock_get_default ();