Other projects like Rhythmbox rely on GStreamer and enjoy native charset fallback by GST_TAG_ENCODING.

It seems to be affordable patching with g_getenv() and some of UTF-8 conversion facilities. But,

• I can't make decision where those lines of patch inserted. From inside of C function metadata_get_title() to the boundary between C# Metadata class and interface layer.
• I don't know how to code C#. Classes and methods of Mono is big challenge to me.

In the long run, such builtin utility shall be replaced by GStreamer thing.

Applying CSS box model to GTK+

Among all the properties in CSS box model,

• only GtkBorder is present in GTK.
• property padding is on list of TODO, AFAIK.
• property margin is missing 'til this time.

GtkAlignment was said to implement padding. Why not GtkContainer?

GtkContainer has ::set_border_width API. But the argument is not a GtkBorder but a integer. ::set_border with GtkBorder must implemented.

One of idea is to build GtkStyle from CSS text and set the style to a widget. GtkStyle possible created by a GtkRcStyle, and I don't know how to make a good GtkRcStyle, yet. GtkRcStyle itself should contain all the properties of CSS text.

libcroco the SAC implementation may be the parser of CSS to RC.

How to sync between two (int) variables, NodeList::length and xmlNodeSet::nodeNr?