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shared: add nm_g_type_find_implementing_class_for_property() helper

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A helper method, only useful for printf debugging -- and thus
unused in the source-tree.

It is relatively cumbersome to lookup the GType that implements
a property. For example, for NMDeviceBond.driver, it should return
NMDevice (which implements the "driver" property).
This commit is contained in:
Thomas Haller 2019-02-19 08:56:18 +01:00
parent fc9d661018
commit c9244d28ae
2 changed files with 52 additions and 0 deletions
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47
shared/nm-utils/nm-shared-utils.c
View file

@ -1413,6 +1413,53 @@ nm_g_object_class_find_property_from_gtype (GType gtype,
/*****************************************************************************/
/**
* nm_g_type_find_implementing_class_for_property:
* @gtype: the GObject type which has a property @pname
* @pname: the name of the property to look up
*
* This is only a helper function for printf debugging. It's not
* used in actual code. Hence, the function just asserts that
* @pname and @gtype arguments are suitable. It cannot fail.
*
* Returns: the most ancestor type of @gtype, that
* implements the property @pname. It means, it
* searches the type hierarchy to find the type
* that added @pname.
*/
GType
nm_g_type_find_implementing_class_for_property (GType gtype,
const char *pname)
{
nm_auto_unref_gtypeclass GObjectClass *klass = NULL;
GParamSpec *pspec;
g_return_val_if_fail (pname, G_TYPE_INVALID);
klass = g_type_class_ref (gtype);
g_return_val_if_fail (G_IS_OBJECT_CLASS (klass), G_TYPE_INVALID);
pspec = g_object_class_find_property (klass, pname);
g_return_val_if_fail (pspec, G_TYPE_INVALID);
gtype = G_TYPE_FROM_CLASS (klass);
while (TRUE) {
nm_auto_unref_gtypeclass GObjectClass *k = NULL;
k = g_type_class_ref (g_type_parent (gtype));
g_return_val_if_fail (G_IS_OBJECT_CLASS (k), G_TYPE_INVALID);
if (g_object_class_find_property (k, pname) != pspec)
return gtype;
gtype = G_TYPE_FROM_CLASS (k);
}
}
/*****************************************************************************/
static void
_str_append_escape (GString *s, char ch)
{

5
shared/nm-utils/nm-shared-utils.h
View file

@ -795,6 +795,11 @@ GParamSpec *nm_g_object_class_find_property_from_gtype (GType gtype,
/*****************************************************************************/
GType nm_g_type_find_implementing_class_for_property (GType gtype,
const char *pname);
/*****************************************************************************/
typedef enum {
NM_UTILS_STR_UTF8_SAFE_FLAG_NONE = 0,
NM_UTILS_STR_UTF8_SAFE_FLAG_ESCAPE_CTRL = 0x0001,