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interval: Transform values on set, if needed

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It's possible that GValues passed to a ClutterInterval setter are not
of the same type as the interval - for instance, if they come from
language bindings, or from untrusted sources; we can use the same
transformation functions we already use inside ClutterTransition to
ensure that the ClutterInterval always stores values of the same type
used to create the interval itself.
This commit is contained in:
Emmanuele Bassi 2012-06-18 11:07:39 +01:00 committed by Emmanuele Bassi
parent b525253c88
commit a0c620b157
1 changed files with 34 additions and 1 deletions
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33
clutter/clutter-interval.c
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@ -463,6 +463,7 @@ clutter_interval_set_value_internal (ClutterInterval *interval,
const GValue *value)
{
ClutterIntervalPrivate *priv = interval->priv;
GType value_type;
g_assert (index_ >= INITIAL && index_ <= RESULT);
@ -470,6 +471,38 @@ clutter_interval_set_value_internal (ClutterInterval *interval,
g_value_unset (&priv->values[index_]);
g_value_init (&priv->values[index_], priv->value_type);
value_type = G_VALUE_TYPE (value);
if (value_type != priv->value_type ||
!g_type_is_a (value_type, priv->value_type))
{
if (g_value_type_compatible (value_type, priv->value_type))
{
g_value_copy (value, &priv->values[index_]);
return;
}
if (g_value_type_transformable (value_type, priv->value_type))
{
GValue transform = G_VALUE_INIT;
g_value_init (&transform, priv->value_type);
if (g_value_transform (value, &transform))
g_value_copy (&transform, &priv->values[index_]);
else
{
g_warning ("%s: Unable to convert a value of type '%s' into "
"the value type '%s' of the interval.",
G_STRLOC,
g_type_name (value_type),
g_type_name (priv->value_type));
}
g_value_unset (&transform);
}
}
else
g_value_copy (value, &priv->values[index_]);
}