G_DEFINE_TYPE (GtkCssAnimation, _gtk_css_animation, GTK_TYPE_STYLE_ANIMATION)
+/* NB: Return value can be negative (if animation hasn't started yet) */
+static gint64
+gtk_css_animation_get_elapsed (GtkCssAnimation *animation,
+ gint64 for_time_us)
+{
+ if (animation->play_state == GTK_CSS_PLAY_STATE_PAUSED)
+ return animation->timestamp;
+ else
+ return for_time_us - animation->timestamp;
+}
/* NB: Return value can be negative and +-Inf */
static double
gtk_css_animation_get_iteration (GtkCssAnimation *animation,
gint64 for_time_us)
{
- gint64 elapsed;
- double iterations;
-
- elapsed = for_time_us - animation->timestamp;
- iterations = (double) elapsed / animation->duration;
-
- return iterations;
+ return (double) gtk_css_animation_get_elapsed (animation, for_time_us) / animation->duration;
}
static gboolean
GtkCssAnimation *animation = GTK_CSS_ANIMATION (style_animation);
double iteration;
+ if (animation->play_state == GTK_CSS_PLAY_STATE_PAUSED)
+ return TRUE;
+
iteration = gtk_css_animation_get_iteration (animation, at_time_us);
return iteration >= animation->iteration_count;
GtkStyleAnimation *
_gtk_css_animation_new (const char *name,
GtkCssKeyframes *keyframes,
- gint64 start_time_us,
+ gint64 timestamp,
+ gint64 delay_us,
gint64 duration_us,
GtkCssValue *ease,
GtkCssDirection direction,
animation->name = g_strdup (name);
animation->keyframes = _gtk_css_keyframes_ref (keyframes);
- animation->timestamp = start_time_us;
+ if (play_state == GTK_CSS_PLAY_STATE_PAUSED)
+ animation->timestamp = - delay_us;
+ else
+ animation->timestamp = timestamp + delay_us;
+
animation->duration = duration_us;
animation->ease = _gtk_css_value_ref (ease);
animation->direction = direction;
return animation->name;
}
+
+GtkStyleAnimation *
+_gtk_css_animation_copy (GtkCssAnimation *animation,
+ gint64 at_time_us,
+ GtkCssPlayState play_state)
+{
+ g_return_val_if_fail (GTK_IS_CSS_ANIMATION (animation), NULL);
+
+ if (animation->play_state == play_state)
+ return g_object_ref (animation);
+
+ return _gtk_css_animation_new (animation->name,
+ animation->keyframes,
+ at_time_us,
+ - gtk_css_animation_get_elapsed (animation, at_time_us),
+ animation->duration,
+ animation->ease,
+ animation->direction,
+ play_state,
+ animation->fill_mode,
+ animation->iteration_count);
+}
+